From f015ec9ad03a8c22f423638c5338da0a185c5235 Mon Sep 17 00:00:00 2001 From: The Android Open Source Project Date: Tue, 3 Mar 2009 18:28:25 -0800 Subject: auto import from //depot/cupcake/@135843 --- Android.mk | 13 - config.h | 13 - dgif_lib.c | 1098 ----------------------------------------------------- gif_err.c | 120 ------ gif_hash.h | 59 --- gif_lib.h | 336 ---------------- gif_lib_private.h | 59 --- gifalloc.c | 443 --------------------- 8 files changed, 2141 deletions(-) delete mode 100644 Android.mk delete mode 100644 config.h delete mode 100644 dgif_lib.c delete mode 100644 gif_err.c delete mode 100644 gif_hash.h delete mode 100644 gif_lib.h delete mode 100644 gif_lib_private.h delete mode 100644 gifalloc.c diff --git a/Android.mk b/Android.mk deleted file mode 100644 index 2453314..0000000 --- a/Android.mk +++ /dev/null @@ -1,13 +0,0 @@ -LOCAL_PATH:= $(call my-dir) -include $(CLEAR_VARS) - -LOCAL_SRC_FILES := \ - dgif_lib.c \ - gifalloc.c \ - gif_err.c - -LOCAL_CFLAGS += -Wno-format -DHAVE_CONFIG_H - -LOCAL_MODULE:= libgif - -include $(BUILD_STATIC_LIBRARY) diff --git a/config.h b/config.h deleted file mode 100644 index 3193a1b..0000000 --- a/config.h +++ /dev/null @@ -1,13 +0,0 @@ - -// giflib config.h - -#ifndef GIF_CONFIG_H_DEFINED -#define GIF_CONFIG_H_DEFINED - -#include -#include -#include - -typedef uint32_t UINT32; - -#endif diff --git a/dgif_lib.c b/dgif_lib.c deleted file mode 100644 index 760d053..0000000 --- a/dgif_lib.c +++ /dev/null @@ -1,1098 +0,0 @@ -/****************************************************************************** - * "Gif-Lib" - Yet another gif library. - * - * Written by: Gershon Elber IBM PC Ver 1.1, Aug. 1990 - ****************************************************************************** - * The kernel of the GIF Decoding process can be found here. - ****************************************************************************** - * History: - * 16 Jun 89 - Version 1.0 by Gershon Elber. - * 3 Sep 90 - Version 1.1 by Gershon Elber (Support for Gif89, Unique names). - *****************************************************************************/ - -#ifdef HAVE_CONFIG_H -#include -#endif - -#include -#if defined (__MSDOS__) && !defined(__DJGPP__) && !defined(__GNUC__) -#include -#include -#include -#else -#include -#include -#endif /* __MSDOS__ */ - -#ifdef HAVE_IO_H -#include -#endif - -#ifdef HAVE_FCNTL_H -#include -#endif /* HAVE_FCNTL_H */ -#ifdef HAVE_UNISTD_H -#include -#endif /* HAVE_UNISTD_H */ -#include -#include -#include "gif_lib.h" -#include "gif_lib_private.h" - -#define COMMENT_EXT_FUNC_CODE 0xfe /* Extension function code for - comment. */ - -/* avoid extra function call in case we use fread (TVT) */ -#define READ(_gif,_buf,_len) \ - (((GifFilePrivateType*)_gif->Private)->Read ? \ - ((GifFilePrivateType*)_gif->Private)->Read(_gif,_buf,_len) : \ - fread(_buf,1,_len,((GifFilePrivateType*)_gif->Private)->File)) - -static int DGifGetWord(GifFileType *GifFile, GifWord *Word); -static int DGifSetupDecompress(GifFileType *GifFile); -static int DGifDecompressLine(GifFileType *GifFile, GifPixelType *Line, - int LineLen); -static int DGifGetPrefixChar(GifPrefixType *Prefix, int Code, int ClearCode); -static int DGifDecompressInput(GifFileType *GifFile, int *Code); -static int DGifBufferedInput(GifFileType *GifFile, GifByteType *Buf, - GifByteType *NextByte); -#ifndef _GBA_NO_FILEIO - -/****************************************************************************** - * Open a new gif file for read, given by its name. - * Returns GifFileType pointer dynamically allocated which serves as the gif - * info record. _GifError is cleared if succesfull. - *****************************************************************************/ -GifFileType * -DGifOpenFileName(const char *FileName) { - int FileHandle; - GifFileType *GifFile; - - if ((FileHandle = open(FileName, O_RDONLY -#if defined(__MSDOS__) || defined(WINDOWS32) || defined(_OPEN_BINARY) - | O_BINARY -#endif /* __MSDOS__ || _OPEN_BINARY */ - )) == -1) { - _GifError = D_GIF_ERR_OPEN_FAILED; - return NULL; - } - - GifFile = DGifOpenFileHandle(FileHandle); - return GifFile; -} - -/****************************************************************************** - * Update a new gif file, given its file handle. - * Returns GifFileType pointer dynamically allocated which serves as the gif - * info record. _GifError is cleared if succesfull. - *****************************************************************************/ -GifFileType * -DGifOpenFileHandle(int FileHandle) { - - unsigned char Buf[GIF_STAMP_LEN + 1]; - GifFileType *GifFile; - GifFilePrivateType *Private; - FILE *f; - - GifFile = (GifFileType *)malloc(sizeof(GifFileType)); - if (GifFile == NULL) { - _GifError = D_GIF_ERR_NOT_ENOUGH_MEM; - close(FileHandle); - return NULL; - } - - memset(GifFile, '\0', sizeof(GifFileType)); - - Private = (GifFilePrivateType *)malloc(sizeof(GifFilePrivateType)); - if (Private == NULL) { - _GifError = D_GIF_ERR_NOT_ENOUGH_MEM; - close(FileHandle); - free((char *)GifFile); - return NULL; - } -#if defined(__MSDOS__) || defined(WINDOWS32) || defined(_OPEN_BINARY) - setmode(FileHandle, O_BINARY); /* Make sure it is in binary mode. */ -#endif /* __MSDOS__ */ - - f = fdopen(FileHandle, "rb"); /* Make it into a stream: */ - -#if defined(__MSDOS__) || defined(WINDOWS32) - setvbuf(f, NULL, _IOFBF, GIF_FILE_BUFFER_SIZE); /* And inc. stream - buffer. */ -#endif /* __MSDOS__ */ - - GifFile->Private = (VoidPtr)Private; - Private->FileHandle = FileHandle; - Private->File = f; - Private->FileState = FILE_STATE_READ; - Private->Read = 0; /* don't use alternate input method (TVT) */ - GifFile->UserData = 0; /* TVT */ - - /* Lets see if this is a GIF file: */ - if (READ(GifFile, Buf, GIF_STAMP_LEN) != GIF_STAMP_LEN) { - _GifError = D_GIF_ERR_READ_FAILED; - fclose(f); - free((char *)Private); - free((char *)GifFile); - return NULL; - } - - /* The GIF Version number is ignored at this time. Maybe we should do - * something more useful with it. */ - Buf[GIF_STAMP_LEN] = 0; - if (strncmp(GIF_STAMP, Buf, GIF_VERSION_POS) != 0) { - _GifError = D_GIF_ERR_NOT_GIF_FILE; - fclose(f); - free((char *)Private); - free((char *)GifFile); - return NULL; - } - - if (DGifGetScreenDesc(GifFile) == GIF_ERROR) { - fclose(f); - free((char *)Private); - free((char *)GifFile); - return NULL; - } - - _GifError = 0; - - return GifFile; -} - -#endif /* _GBA_NO_FILEIO */ - -/****************************************************************************** - * GifFileType constructor with user supplied input function (TVT) - *****************************************************************************/ -GifFileType * -DGifOpen(void *userData, - InputFunc readFunc) { - - unsigned char Buf[GIF_STAMP_LEN + 1]; - GifFileType *GifFile; - GifFilePrivateType *Private; - - GifFile = (GifFileType *)malloc(sizeof(GifFileType)); - if (GifFile == NULL) { - _GifError = D_GIF_ERR_NOT_ENOUGH_MEM; - return NULL; - } - - memset(GifFile, '\0', sizeof(GifFileType)); - - Private = (GifFilePrivateType *)malloc(sizeof(GifFilePrivateType)); - if (!Private) { - _GifError = D_GIF_ERR_NOT_ENOUGH_MEM; - free((char *)GifFile); - return NULL; - } - - GifFile->Private = (VoidPtr)Private; - Private->FileHandle = 0; - Private->File = 0; - Private->FileState = FILE_STATE_READ; - - Private->Read = readFunc; /* TVT */ - GifFile->UserData = userData; /* TVT */ - - /* Lets see if this is a GIF file: */ - if (READ(GifFile, Buf, GIF_STAMP_LEN) != GIF_STAMP_LEN) { - _GifError = D_GIF_ERR_READ_FAILED; - free((char *)Private); - free((char *)GifFile); - return NULL; - } - - /* The GIF Version number is ignored at this time. Maybe we should do - * something more useful with it. */ - Buf[GIF_STAMP_LEN] = 0; - if (strncmp(GIF_STAMP, Buf, GIF_VERSION_POS) != 0) { - _GifError = D_GIF_ERR_NOT_GIF_FILE; - free((char *)Private); - free((char *)GifFile); - return NULL; - } - - if (DGifGetScreenDesc(GifFile) == GIF_ERROR) { - free((char *)Private); - free((char *)GifFile); - return NULL; - } - - _GifError = 0; - - return GifFile; -} - -/****************************************************************************** - * This routine should be called before any other DGif calls. Note that - * this routine is called automatically from DGif file open routines. - *****************************************************************************/ -int -DGifGetScreenDesc(GifFileType * GifFile) { - - int i, BitsPerPixel; - GifByteType Buf[3]; - GifFilePrivateType *Private = (GifFilePrivateType *)GifFile->Private; - - if (!IS_READABLE(Private)) { - /* This file was NOT open for reading: */ - _GifError = D_GIF_ERR_NOT_READABLE; - return GIF_ERROR; - } - - /* Put the screen descriptor into the file: */ - if (DGifGetWord(GifFile, &GifFile->SWidth) == GIF_ERROR || - DGifGetWord(GifFile, &GifFile->SHeight) == GIF_ERROR) - return GIF_ERROR; - - if (READ(GifFile, Buf, 3) != 3) { - _GifError = D_GIF_ERR_READ_FAILED; - return GIF_ERROR; - } - GifFile->SColorResolution = (((Buf[0] & 0x70) + 1) >> 4) + 1; - BitsPerPixel = (Buf[0] & 0x07) + 1; - GifFile->SBackGroundColor = Buf[1]; - if (Buf[0] & 0x80) { /* Do we have global color map? */ - - GifFile->SColorMap = MakeMapObject(1 << BitsPerPixel, NULL); - if (GifFile->SColorMap == NULL) { - _GifError = D_GIF_ERR_NOT_ENOUGH_MEM; - return GIF_ERROR; - } - - /* Get the global color map: */ - for (i = 0; i < GifFile->SColorMap->ColorCount; i++) { - if (READ(GifFile, Buf, 3) != 3) { - FreeMapObject(GifFile->SColorMap); - GifFile->SColorMap = NULL; - _GifError = D_GIF_ERR_READ_FAILED; - return GIF_ERROR; - } - GifFile->SColorMap->Colors[i].Red = Buf[0]; - GifFile->SColorMap->Colors[i].Green = Buf[1]; - GifFile->SColorMap->Colors[i].Blue = Buf[2]; - } - } else { - GifFile->SColorMap = NULL; - } - - return GIF_OK; -} - -/****************************************************************************** - * This routine should be called before any attempt to read an image. - *****************************************************************************/ -int -DGifGetRecordType(GifFileType * GifFile, - GifRecordType * Type) { - - GifByteType Buf; - GifFilePrivateType *Private = (GifFilePrivateType *)GifFile->Private; - - if (!IS_READABLE(Private)) { - /* This file was NOT open for reading: */ - _GifError = D_GIF_ERR_NOT_READABLE; - return GIF_ERROR; - } - - if (READ(GifFile, &Buf, 1) != 1) { - _GifError = D_GIF_ERR_READ_FAILED; - return GIF_ERROR; - } - - switch (Buf) { - case ',': - *Type = IMAGE_DESC_RECORD_TYPE; - break; - case '!': - *Type = EXTENSION_RECORD_TYPE; - break; - case ';': - *Type = TERMINATE_RECORD_TYPE; - break; - default: - *Type = UNDEFINED_RECORD_TYPE; - _GifError = D_GIF_ERR_WRONG_RECORD; - return GIF_ERROR; - } - - return GIF_OK; -} - -/****************************************************************************** - * This routine should be called before any attempt to read an image. - * Note it is assumed the Image desc. header (',') has been read. - *****************************************************************************/ -int -DGifGetImageDesc(GifFileType * GifFile) { - - int i, BitsPerPixel; - GifByteType Buf[3]; - GifFilePrivateType *Private = (GifFilePrivateType *)GifFile->Private; - SavedImage *sp; - - if (!IS_READABLE(Private)) { - /* This file was NOT open for reading: */ - _GifError = D_GIF_ERR_NOT_READABLE; - return GIF_ERROR; - } - - if (DGifGetWord(GifFile, &GifFile->Image.Left) == GIF_ERROR || - DGifGetWord(GifFile, &GifFile->Image.Top) == GIF_ERROR || - DGifGetWord(GifFile, &GifFile->Image.Width) == GIF_ERROR || - DGifGetWord(GifFile, &GifFile->Image.Height) == GIF_ERROR) - return GIF_ERROR; - if (READ(GifFile, Buf, 1) != 1) { - _GifError = D_GIF_ERR_READ_FAILED; - return GIF_ERROR; - } - BitsPerPixel = (Buf[0] & 0x07) + 1; - GifFile->Image.Interlace = (Buf[0] & 0x40); - if (Buf[0] & 0x80) { /* Does this image have local color map? */ - - /*** FIXME: Why do we check both of these in order to do this? - * Why do we have both Image and SavedImages? */ - if (GifFile->Image.ColorMap && GifFile->SavedImages == NULL) - FreeMapObject(GifFile->Image.ColorMap); - - GifFile->Image.ColorMap = MakeMapObject(1 << BitsPerPixel, NULL); - if (GifFile->Image.ColorMap == NULL) { - _GifError = D_GIF_ERR_NOT_ENOUGH_MEM; - return GIF_ERROR; - } - - /* Get the image local color map: */ - for (i = 0; i < GifFile->Image.ColorMap->ColorCount; i++) { - if (READ(GifFile, Buf, 3) != 3) { - FreeMapObject(GifFile->Image.ColorMap); - _GifError = D_GIF_ERR_READ_FAILED; - GifFile->Image.ColorMap = NULL; - return GIF_ERROR; - } - GifFile->Image.ColorMap->Colors[i].Red = Buf[0]; - GifFile->Image.ColorMap->Colors[i].Green = Buf[1]; - GifFile->Image.ColorMap->Colors[i].Blue = Buf[2]; - } - } else if (GifFile->Image.ColorMap) { - FreeMapObject(GifFile->Image.ColorMap); - GifFile->Image.ColorMap = NULL; - } - - if (GifFile->SavedImages) { - if ((GifFile->SavedImages = (SavedImage *)realloc(GifFile->SavedImages, - sizeof(SavedImage) * - (GifFile->ImageCount + 1))) == NULL) { - _GifError = D_GIF_ERR_NOT_ENOUGH_MEM; - return GIF_ERROR; - } - } else { - if ((GifFile->SavedImages = - (SavedImage *) malloc(sizeof(SavedImage))) == NULL) { - _GifError = D_GIF_ERR_NOT_ENOUGH_MEM; - return GIF_ERROR; - } - } - - sp = &GifFile->SavedImages[GifFile->ImageCount]; - memcpy(&sp->ImageDesc, &GifFile->Image, sizeof(GifImageDesc)); - if (GifFile->Image.ColorMap != NULL) { - sp->ImageDesc.ColorMap = MakeMapObject( - GifFile->Image.ColorMap->ColorCount, - GifFile->Image.ColorMap->Colors); - if (sp->ImageDesc.ColorMap == NULL) { - _GifError = D_GIF_ERR_NOT_ENOUGH_MEM; - return GIF_ERROR; - } - } - sp->RasterBits = (unsigned char *)NULL; - sp->ExtensionBlockCount = 0; - sp->ExtensionBlocks = (ExtensionBlock *) NULL; - - GifFile->ImageCount++; - - Private->PixelCount = (long)GifFile->Image.Width * - (long)GifFile->Image.Height; - - DGifSetupDecompress(GifFile); /* Reset decompress algorithm parameters. */ - - return GIF_OK; -} - -/****************************************************************************** - * Get one full scanned line (Line) of length LineLen from GIF file. - *****************************************************************************/ -int -DGifGetLine(GifFileType * GifFile, - GifPixelType * Line, - int LineLen) { - - GifByteType *Dummy; - GifFilePrivateType *Private = (GifFilePrivateType *) GifFile->Private; - - if (!IS_READABLE(Private)) { - /* This file was NOT open for reading: */ - _GifError = D_GIF_ERR_NOT_READABLE; - return GIF_ERROR; - } - - if (!LineLen) - LineLen = GifFile->Image.Width; - -#if defined(__MSDOS__) || defined(WINDOWS32) || defined(__GNUC__) - if ((Private->PixelCount -= LineLen) > 0xffff0000UL) { -#else - if ((Private->PixelCount -= LineLen) > 0xffff0000) { -#endif /* __MSDOS__ */ - _GifError = D_GIF_ERR_DATA_TOO_BIG; - return GIF_ERROR; - } - - if (DGifDecompressLine(GifFile, Line, LineLen) == GIF_OK) { - if (Private->PixelCount == 0) { - /* We probably would not be called any more, so lets clean - * everything before we return: need to flush out all rest of - * image until empty block (size 0) detected. We use GetCodeNext. */ - do - if (DGifGetCodeNext(GifFile, &Dummy) == GIF_ERROR) - return GIF_ERROR; - while (Dummy != NULL) ; - } - return GIF_OK; - } else - return GIF_ERROR; -} - -/****************************************************************************** - * Put one pixel (Pixel) into GIF file. - *****************************************************************************/ -int -DGifGetPixel(GifFileType * GifFile, - GifPixelType Pixel) { - - GifByteType *Dummy; - GifFilePrivateType *Private = (GifFilePrivateType *) GifFile->Private; - - if (!IS_READABLE(Private)) { - /* This file was NOT open for reading: */ - _GifError = D_GIF_ERR_NOT_READABLE; - return GIF_ERROR; - } -#if defined(__MSDOS__) || defined(WINDOWS32) || defined(__GNUC__) - if (--Private->PixelCount > 0xffff0000UL) -#else - if (--Private->PixelCount > 0xffff0000) -#endif /* __MSDOS__ */ - { - _GifError = D_GIF_ERR_DATA_TOO_BIG; - return GIF_ERROR; - } - - if (DGifDecompressLine(GifFile, &Pixel, 1) == GIF_OK) { - if (Private->PixelCount == 0) { - /* We probably would not be called any more, so lets clean - * everything before we return: need to flush out all rest of - * image until empty block (size 0) detected. We use GetCodeNext. */ - do - if (DGifGetCodeNext(GifFile, &Dummy) == GIF_ERROR) - return GIF_ERROR; - while (Dummy != NULL) ; - } - return GIF_OK; - } else - return GIF_ERROR; -} - -/****************************************************************************** - * Get an extension block (see GIF manual) from gif file. This routine only - * returns the first data block, and DGifGetExtensionNext should be called - * after this one until NULL extension is returned. - * The Extension should NOT be freed by the user (not dynamically allocated). - * Note it is assumed the Extension desc. header ('!') has been read. - *****************************************************************************/ -int -DGifGetExtension(GifFileType * GifFile, - int *ExtCode, - GifByteType ** Extension) { - - GifByteType Buf; - GifFilePrivateType *Private = (GifFilePrivateType *)GifFile->Private; - - if (!IS_READABLE(Private)) { - /* This file was NOT open for reading: */ - _GifError = D_GIF_ERR_NOT_READABLE; - return GIF_ERROR; - } - - if (READ(GifFile, &Buf, 1) != 1) { - _GifError = D_GIF_ERR_READ_FAILED; - return GIF_ERROR; - } - *ExtCode = Buf; - - return DGifGetExtensionNext(GifFile, Extension); -} - -/****************************************************************************** - * Get a following extension block (see GIF manual) from gif file. This - * routine should be called until NULL Extension is returned. - * The Extension should NOT be freed by the user (not dynamically allocated). - *****************************************************************************/ -int -DGifGetExtensionNext(GifFileType * GifFile, - GifByteType ** Extension) { - - GifByteType Buf; - GifFilePrivateType *Private = (GifFilePrivateType *)GifFile->Private; - - if (READ(GifFile, &Buf, 1) != 1) { - _GifError = D_GIF_ERR_READ_FAILED; - return GIF_ERROR; - } - if (Buf > 0) { - *Extension = Private->Buf; /* Use private unused buffer. */ - (*Extension)[0] = Buf; /* Pascal strings notation (pos. 0 is len.). */ - if (READ(GifFile, &((*Extension)[1]), Buf) != Buf) { - _GifError = D_GIF_ERR_READ_FAILED; - return GIF_ERROR; - } - } else - *Extension = NULL; - - return GIF_OK; -} - -/****************************************************************************** - * This routine should be called last, to close the GIF file. - *****************************************************************************/ -int -DGifCloseFile(GifFileType * GifFile) { - - GifFilePrivateType *Private; - FILE *File; - - if (GifFile == NULL) - return GIF_ERROR; - - Private = (GifFilePrivateType *) GifFile->Private; - - if (!IS_READABLE(Private)) { - /* This file was NOT open for reading: */ - _GifError = D_GIF_ERR_NOT_READABLE; - return GIF_ERROR; - } - - File = Private->File; - - if (GifFile->Image.ColorMap) { - FreeMapObject(GifFile->Image.ColorMap); - GifFile->Image.ColorMap = NULL; - } - - if (GifFile->SColorMap) { - FreeMapObject(GifFile->SColorMap); - GifFile->SColorMap = NULL; - } - - if (Private) { - free((char *)Private); - Private = NULL; - } - - if (GifFile->SavedImages) { - FreeSavedImages(GifFile); - GifFile->SavedImages = NULL; - } - - free(GifFile); - - if (File && (fclose(File) != 0)) { - _GifError = D_GIF_ERR_CLOSE_FAILED; - return GIF_ERROR; - } - return GIF_OK; -} - -/****************************************************************************** - * Get 2 bytes (word) from the given file: - *****************************************************************************/ -static int -DGifGetWord(GifFileType * GifFile, - GifWord *Word) { - - unsigned char c[2]; - - if (READ(GifFile, c, 2) != 2) { - _GifError = D_GIF_ERR_READ_FAILED; - return GIF_ERROR; - } - - *Word = (((unsigned int)c[1]) << 8) + c[0]; - return GIF_OK; -} - -/****************************************************************************** - * Get the image code in compressed form. This routine can be called if the - * information needed to be piped out as is. Obviously this is much faster - * than decoding and encoding again. This routine should be followed by calls - * to DGifGetCodeNext, until NULL block is returned. - * The block should NOT be freed by the user (not dynamically allocated). - *****************************************************************************/ -int -DGifGetCode(GifFileType * GifFile, - int *CodeSize, - GifByteType ** CodeBlock) { - - GifFilePrivateType *Private = (GifFilePrivateType *)GifFile->Private; - - if (!IS_READABLE(Private)) { - /* This file was NOT open for reading: */ - _GifError = D_GIF_ERR_NOT_READABLE; - return GIF_ERROR; - } - - *CodeSize = Private->BitsPerPixel; - - return DGifGetCodeNext(GifFile, CodeBlock); -} - -/****************************************************************************** - * Continue to get the image code in compressed form. This routine should be - * called until NULL block is returned. - * The block should NOT be freed by the user (not dynamically allocated). - *****************************************************************************/ -int -DGifGetCodeNext(GifFileType * GifFile, - GifByteType ** CodeBlock) { - - GifByteType Buf; - GifFilePrivateType *Private = (GifFilePrivateType *)GifFile->Private; - - if (READ(GifFile, &Buf, 1) != 1) { - _GifError = D_GIF_ERR_READ_FAILED; - return GIF_ERROR; - } - - if (Buf > 0) { - *CodeBlock = Private->Buf; /* Use private unused buffer. */ - (*CodeBlock)[0] = Buf; /* Pascal strings notation (pos. 0 is len.). */ - if (READ(GifFile, &((*CodeBlock)[1]), Buf) != Buf) { - _GifError = D_GIF_ERR_READ_FAILED; - return GIF_ERROR; - } - } else { - *CodeBlock = NULL; - Private->Buf[0] = 0; /* Make sure the buffer is empty! */ - Private->PixelCount = 0; /* And local info. indicate image read. */ - } - - return GIF_OK; -} - -/****************************************************************************** - * Setup the LZ decompression for this image: - *****************************************************************************/ -static int -DGifSetupDecompress(GifFileType * GifFile) { - - int i, BitsPerPixel; - GifByteType CodeSize; - GifPrefixType *Prefix; - GifFilePrivateType *Private = (GifFilePrivateType *)GifFile->Private; - - READ(GifFile, &CodeSize, 1); /* Read Code size from file. */ - BitsPerPixel = CodeSize; - - Private->Buf[0] = 0; /* Input Buffer empty. */ - Private->BitsPerPixel = BitsPerPixel; - Private->ClearCode = (1 << BitsPerPixel); - Private->EOFCode = Private->ClearCode + 1; - Private->RunningCode = Private->EOFCode + 1; - Private->RunningBits = BitsPerPixel + 1; /* Number of bits per code. */ - Private->MaxCode1 = 1 << Private->RunningBits; /* Max. code + 1. */ - Private->StackPtr = 0; /* No pixels on the pixel stack. */ - Private->LastCode = NO_SUCH_CODE; - Private->CrntShiftState = 0; /* No information in CrntShiftDWord. */ - Private->CrntShiftDWord = 0; - - Prefix = Private->Prefix; - for (i = 0; i <= LZ_MAX_CODE; i++) - Prefix[i] = NO_SUCH_CODE; - - return GIF_OK; -} - -/****************************************************************************** - * The LZ decompression routine: - * This version decompress the given gif file into Line of length LineLen. - * This routine can be called few times (one per scan line, for example), in - * order the complete the whole image. - *****************************************************************************/ -static int -DGifDecompressLine(GifFileType * GifFile, - GifPixelType * Line, - int LineLen) { - - int i = 0; - int j, CrntCode, EOFCode, ClearCode, CrntPrefix, LastCode, StackPtr; - GifByteType *Stack, *Suffix; - GifPrefixType *Prefix; - GifFilePrivateType *Private = (GifFilePrivateType *) GifFile->Private; - - StackPtr = Private->StackPtr; - Prefix = Private->Prefix; - Suffix = Private->Suffix; - Stack = Private->Stack; - EOFCode = Private->EOFCode; - ClearCode = Private->ClearCode; - LastCode = Private->LastCode; - - if (StackPtr > LZ_MAX_CODE) { - return GIF_ERROR; - } - - if (StackPtr != 0) { - /* Let pop the stack off before continueing to read the gif file: */ - while (StackPtr != 0 && i < LineLen) - Line[i++] = Stack[--StackPtr]; - } - - while (i < LineLen) { /* Decode LineLen items. */ - if (DGifDecompressInput(GifFile, &CrntCode) == GIF_ERROR) - return GIF_ERROR; - - if (CrntCode == EOFCode) { - /* Note however that usually we will not be here as we will stop - * decoding as soon as we got all the pixel, or EOF code will - * not be read at all, and DGifGetLine/Pixel clean everything. */ - if (i != LineLen - 1 || Private->PixelCount != 0) { - _GifError = D_GIF_ERR_EOF_TOO_SOON; - return GIF_ERROR; - } - i++; - } else if (CrntCode == ClearCode) { - /* We need to start over again: */ - for (j = 0; j <= LZ_MAX_CODE; j++) - Prefix[j] = NO_SUCH_CODE; - Private->RunningCode = Private->EOFCode + 1; - Private->RunningBits = Private->BitsPerPixel + 1; - Private->MaxCode1 = 1 << Private->RunningBits; - LastCode = Private->LastCode = NO_SUCH_CODE; - } else { - /* Its regular code - if in pixel range simply add it to output - * stream, otherwise trace to codes linked list until the prefix - * is in pixel range: */ - if (CrntCode < ClearCode) { - /* This is simple - its pixel scalar, so add it to output: */ - Line[i++] = CrntCode; - } else { - /* Its a code to needed to be traced: trace the linked list - * until the prefix is a pixel, while pushing the suffix - * pixels on our stack. If we done, pop the stack in reverse - * (thats what stack is good for!) order to output. */ - if (Prefix[CrntCode] == NO_SUCH_CODE) { - /* Only allowed if CrntCode is exactly the running code: - * In that case CrntCode = XXXCode, CrntCode or the - * prefix code is last code and the suffix char is - * exactly the prefix of last code! */ - if (CrntCode == Private->RunningCode - 2) { - CrntPrefix = LastCode; - Suffix[Private->RunningCode - 2] = - Stack[StackPtr++] = DGifGetPrefixChar(Prefix, - LastCode, - ClearCode); - } else { - _GifError = D_GIF_ERR_IMAGE_DEFECT; - return GIF_ERROR; - } - } else - CrntPrefix = CrntCode; - - /* Now (if image is O.K.) we should not get an NO_SUCH_CODE - * During the trace. As we might loop forever, in case of - * defective image, we count the number of loops we trace - * and stop if we got LZ_MAX_CODE. obviously we can not - * loop more than that. */ - j = 0; - while (j++ <= LZ_MAX_CODE && - CrntPrefix > ClearCode && CrntPrefix <= LZ_MAX_CODE) { - Stack[StackPtr++] = Suffix[CrntPrefix]; - CrntPrefix = Prefix[CrntPrefix]; - } - if (j >= LZ_MAX_CODE || CrntPrefix > LZ_MAX_CODE) { - _GifError = D_GIF_ERR_IMAGE_DEFECT; - return GIF_ERROR; - } - /* Push the last character on stack: */ - Stack[StackPtr++] = CrntPrefix; - - /* Now lets pop all the stack into output: */ - while (StackPtr != 0 && i < LineLen) - Line[i++] = Stack[--StackPtr]; - } - if (LastCode != NO_SUCH_CODE) { - Prefix[Private->RunningCode - 2] = LastCode; - - if (CrntCode == Private->RunningCode - 2) { - /* Only allowed if CrntCode is exactly the running code: - * In that case CrntCode = XXXCode, CrntCode or the - * prefix code is last code and the suffix char is - * exactly the prefix of last code! */ - Suffix[Private->RunningCode - 2] = - DGifGetPrefixChar(Prefix, LastCode, ClearCode); - } else { - Suffix[Private->RunningCode - 2] = - DGifGetPrefixChar(Prefix, CrntCode, ClearCode); - } - } - LastCode = CrntCode; - } - } - - Private->LastCode = LastCode; - Private->StackPtr = StackPtr; - - return GIF_OK; -} - -/****************************************************************************** - * Routine to trace the Prefixes linked list until we get a prefix which is - * not code, but a pixel value (less than ClearCode). Returns that pixel value. - * If image is defective, we might loop here forever, so we limit the loops to - * the maximum possible if image O.k. - LZ_MAX_CODE times. - *****************************************************************************/ -static int -DGifGetPrefixChar(GifPrefixType *Prefix, - int Code, - int ClearCode) { - - int i = 0; - - while (Code > ClearCode && i++ <= LZ_MAX_CODE) { - if (Code > LZ_MAX_CODE) { - return NO_SUCH_CODE; - } - Code = Prefix[Code]; - } - return Code; -} - -/****************************************************************************** - * Interface for accessing the LZ codes directly. Set Code to the real code - * (12bits), or to -1 if EOF code is returned. - *****************************************************************************/ -int -DGifGetLZCodes(GifFileType * GifFile, - int *Code) { - - GifByteType *CodeBlock; - GifFilePrivateType *Private = (GifFilePrivateType *)GifFile->Private; - - if (!IS_READABLE(Private)) { - /* This file was NOT open for reading: */ - _GifError = D_GIF_ERR_NOT_READABLE; - return GIF_ERROR; - } - - if (DGifDecompressInput(GifFile, Code) == GIF_ERROR) - return GIF_ERROR; - - if (*Code == Private->EOFCode) { - /* Skip rest of codes (hopefully only NULL terminating block): */ - do { - if (DGifGetCodeNext(GifFile, &CodeBlock) == GIF_ERROR) - return GIF_ERROR; - } while (CodeBlock != NULL) ; - - *Code = -1; - } else if (*Code == Private->ClearCode) { - /* We need to start over again: */ - Private->RunningCode = Private->EOFCode + 1; - Private->RunningBits = Private->BitsPerPixel + 1; - Private->MaxCode1 = 1 << Private->RunningBits; - } - - return GIF_OK; -} - -/****************************************************************************** - * The LZ decompression input routine: - * This routine is responsable for the decompression of the bit stream from - * 8 bits (bytes) packets, into the real codes. - * Returns GIF_OK if read succesfully. - *****************************************************************************/ -static int -DGifDecompressInput(GifFileType * GifFile, - int *Code) { - - GifFilePrivateType *Private = (GifFilePrivateType *)GifFile->Private; - - GifByteType NextByte; - static unsigned short CodeMasks[] = { - 0x0000, 0x0001, 0x0003, 0x0007, - 0x000f, 0x001f, 0x003f, 0x007f, - 0x00ff, 0x01ff, 0x03ff, 0x07ff, - 0x0fff - }; - /* The image can't contain more than LZ_BITS per code. */ - if (Private->RunningBits > LZ_BITS) { - _GifError = D_GIF_ERR_IMAGE_DEFECT; - return GIF_ERROR; - } - - while (Private->CrntShiftState < Private->RunningBits) { - /* Needs to get more bytes from input stream for next code: */ - if (DGifBufferedInput(GifFile, Private->Buf, &NextByte) == GIF_ERROR) { - return GIF_ERROR; - } - Private->CrntShiftDWord |= - ((unsigned long)NextByte) << Private->CrntShiftState; - Private->CrntShiftState += 8; - } - *Code = Private->CrntShiftDWord & CodeMasks[Private->RunningBits]; - - Private->CrntShiftDWord >>= Private->RunningBits; - Private->CrntShiftState -= Private->RunningBits; - - /* If code cannot fit into RunningBits bits, must raise its size. Note - * however that codes above 4095 are used for special signaling. - * If we're using LZ_BITS bits already and we're at the max code, just - * keep using the table as it is, don't increment Private->RunningCode. - */ - if (Private->RunningCode < LZ_MAX_CODE + 2 && - ++Private->RunningCode > Private->MaxCode1 && - Private->RunningBits < LZ_BITS) { - Private->MaxCode1 <<= 1; - Private->RunningBits++; - } - return GIF_OK; -} - -/****************************************************************************** - * This routines read one gif data block at a time and buffers it internally - * so that the decompression routine could access it. - * The routine returns the next byte from its internal buffer (or read next - * block in if buffer empty) and returns GIF_OK if succesful. - *****************************************************************************/ -static int -DGifBufferedInput(GifFileType * GifFile, - GifByteType * Buf, - GifByteType * NextByte) { - - if (Buf[0] == 0) { - /* Needs to read the next buffer - this one is empty: */ - if (READ(GifFile, Buf, 1) != 1) { - _GifError = D_GIF_ERR_READ_FAILED; - return GIF_ERROR; - } - /* There shouldn't be any empty data blocks here as the LZW spec - * says the LZW termination code should come first. Therefore we - * shouldn't be inside this routine at that point. - */ - if (Buf[0] == 0) { - _GifError = D_GIF_ERR_IMAGE_DEFECT; - return GIF_ERROR; - } - if (READ(GifFile, &Buf[1], Buf[0]) != Buf[0]) { - _GifError = D_GIF_ERR_READ_FAILED; - return GIF_ERROR; - } - *NextByte = Buf[1]; - Buf[1] = 2; /* We use now the second place as last char read! */ - Buf[0]--; - } else { - *NextByte = Buf[Buf[1]++]; - Buf[0]--; - } - - return GIF_OK; -} -#ifndef _GBA_NO_FILEIO - -/****************************************************************************** - * This routine reads an entire GIF into core, hanging all its state info off - * the GifFileType pointer. Call DGifOpenFileName() or DGifOpenFileHandle() - * first to initialize I/O. Its inverse is EGifSpew(). - ******************************************************************************/ -int -DGifSlurp(GifFileType * GifFile) { - - int ImageSize; - GifRecordType RecordType; - SavedImage *sp; - GifByteType *ExtData; - SavedImage temp_save; - - temp_save.ExtensionBlocks = NULL; - temp_save.ExtensionBlockCount = 0; - - do { - if (DGifGetRecordType(GifFile, &RecordType) == GIF_ERROR) - return (GIF_ERROR); - - switch (RecordType) { - case IMAGE_DESC_RECORD_TYPE: - if (DGifGetImageDesc(GifFile) == GIF_ERROR) - return (GIF_ERROR); - - sp = &GifFile->SavedImages[GifFile->ImageCount - 1]; - ImageSize = sp->ImageDesc.Width * sp->ImageDesc.Height; - - sp->RasterBits = (unsigned char *)malloc(ImageSize * - sizeof(GifPixelType)); - if (sp->RasterBits == NULL) { - return GIF_ERROR; - } - if (DGifGetLine(GifFile, sp->RasterBits, ImageSize) == - GIF_ERROR) - return (GIF_ERROR); - if (temp_save.ExtensionBlocks) { - sp->ExtensionBlocks = temp_save.ExtensionBlocks; - sp->ExtensionBlockCount = temp_save.ExtensionBlockCount; - - temp_save.ExtensionBlocks = NULL; - temp_save.ExtensionBlockCount = 0; - - /* FIXME: The following is wrong. It is left in only for - * backwards compatibility. Someday it should go away. Use - * the sp->ExtensionBlocks->Function variable instead. */ - sp->Function = sp->ExtensionBlocks[0].Function; - } - break; - - case EXTENSION_RECORD_TYPE: - if (DGifGetExtension(GifFile, &temp_save.Function, &ExtData) == - GIF_ERROR) - return (GIF_ERROR); - while (ExtData != NULL) { - - /* Create an extension block with our data */ - if (AddExtensionBlock(&temp_save, ExtData[0], &ExtData[1]) - == GIF_ERROR) - return (GIF_ERROR); - - if (DGifGetExtensionNext(GifFile, &ExtData) == GIF_ERROR) - return (GIF_ERROR); - temp_save.Function = 0; - } - break; - - case TERMINATE_RECORD_TYPE: - break; - - default: /* Should be trapped by DGifGetRecordType */ - break; - } - } while (RecordType != TERMINATE_RECORD_TYPE); - - /* Just in case the Gif has an extension block without an associated - * image... (Should we save this into a savefile structure with no image - * instead? Have to check if the present writing code can handle that as - * well.... */ - if (temp_save.ExtensionBlocks) - FreeExtension(&temp_save); - - return (GIF_OK); -} -#endif /* _GBA_NO_FILEIO */ diff --git a/gif_err.c b/gif_err.c deleted file mode 100644 index ea977bd..0000000 --- a/gif_err.c +++ /dev/null @@ -1,120 +0,0 @@ -/***************************************************************************** - * "Gif-Lib" - Yet another gif library. - * - * Written by: Gershon Elber IBM PC Ver 0.1, Jun. 1989 - ***************************************************************************** - * Handle error reporting for the GIF library. - ***************************************************************************** - * History: - * 17 Jun 89 - Version 1.0 by Gershon Elber. - ****************************************************************************/ - -#ifdef HAVE_CONFIG_H -#include -#endif - -#include -#include "gif_lib.h" - -int _GifError = 0; - -/***************************************************************************** - * Return the last GIF error (0 if none) and reset the error. - ****************************************************************************/ -int -GifLastError(void) { - int i = _GifError; - - _GifError = 0; - - return i; -} -#ifndef _GBA_NO_FILEIO - -/***************************************************************************** - * Print the last GIF error to stderr. - ****************************************************************************/ -void -PrintGifError(void) { - char *Err; - - switch (_GifError) { - case E_GIF_ERR_OPEN_FAILED: - Err = "Failed to open given file"; - break; - case E_GIF_ERR_WRITE_FAILED: - Err = "Failed to Write to given file"; - break; - case E_GIF_ERR_HAS_SCRN_DSCR: - Err = "Screen Descriptor already been set"; - break; - case E_GIF_ERR_HAS_IMAG_DSCR: - Err = "Image Descriptor is still active"; - break; - case E_GIF_ERR_NO_COLOR_MAP: - Err = "Neither Global Nor Local color map"; - break; - case E_GIF_ERR_DATA_TOO_BIG: - Err = "#Pixels bigger than Width * Height"; - break; - case E_GIF_ERR_NOT_ENOUGH_MEM: - Err = "Fail to allocate required memory"; - break; - case E_GIF_ERR_DISK_IS_FULL: - Err = "Write failed (disk full?)"; - break; - case E_GIF_ERR_CLOSE_FAILED: - Err = "Failed to close given file"; - break; - case E_GIF_ERR_NOT_WRITEABLE: - Err = "Given file was not opened for write"; - break; - case D_GIF_ERR_OPEN_FAILED: - Err = "Failed to open given file"; - break; - case D_GIF_ERR_READ_FAILED: - Err = "Failed to Read from given file"; - break; - case D_GIF_ERR_NOT_GIF_FILE: - Err = "Given file is NOT GIF file"; - break; - case D_GIF_ERR_NO_SCRN_DSCR: - Err = "No Screen Descriptor detected"; - break; - case D_GIF_ERR_NO_IMAG_DSCR: - Err = "No Image Descriptor detected"; - break; - case D_GIF_ERR_NO_COLOR_MAP: - Err = "Neither Global Nor Local color map"; - break; - case D_GIF_ERR_WRONG_RECORD: - Err = "Wrong record type detected"; - break; - case D_GIF_ERR_DATA_TOO_BIG: - Err = "#Pixels bigger than Width * Height"; - break; - case D_GIF_ERR_NOT_ENOUGH_MEM: - Err = "Fail to allocate required memory"; - break; - case D_GIF_ERR_CLOSE_FAILED: - Err = "Failed to close given file"; - break; - case D_GIF_ERR_NOT_READABLE: - Err = "Given file was not opened for read"; - break; - case D_GIF_ERR_IMAGE_DEFECT: - Err = "Image is defective, decoding aborted"; - break; - case D_GIF_ERR_EOF_TOO_SOON: - Err = "Image EOF detected, before image complete"; - break; - default: - Err = NULL; - break; - } - if (Err != NULL) - fprintf(stderr, "\nGIF-LIB error: %s.\n", Err); - else - fprintf(stderr, "\nGIF-LIB undefined error %d.\n", _GifError); -} -#endif /* _GBA_NO_FILEIO */ diff --git a/gif_hash.h b/gif_hash.h deleted file mode 100644 index 3e23ff3..0000000 --- a/gif_hash.h +++ /dev/null @@ -1,59 +0,0 @@ -/****************************************************************************** -* Declarations, global to other of the GIF-HASH.C module. * -* * -* Written by Gershon Elber, Jun 1989 * -******************************************************************************* -* History: * -* 14 Jun 89 - Version 1.0 by Gershon Elber. * -******************************************************************************/ - -#ifndef _GIF_HASH_H_ -#define _GIF_HASH_H_ - -#ifdef HAVE_CONFIG_H -#include -#endif - -/* Find a thirty-two bit int type */ -#ifdef HAVE_STDINT_H -#include -#endif -#ifdef HAVE_INTTYPES_H -#include -#endif -#ifdef HAVE_SYS_TYPES_H -#include -#endif -#ifdef HAVE_UNISTD_H -#include -#endif - -#ifdef HAVE_BASETSD_H -#include -#endif - -#define HT_SIZE 8192 /* 12bits = 4096 or twice as big! */ -#define HT_KEY_MASK 0x1FFF /* 13bits keys */ -#define HT_KEY_NUM_BITS 13 /* 13bits keys */ -#define HT_MAX_KEY 8191 /* 13bits - 1, maximal code possible */ -#define HT_MAX_CODE 4095 /* Biggest code possible in 12 bits. */ - -/* The 32 bits of the long are divided into two parts for the key & code: */ -/* 1. The code is 12 bits as our compression algorithm is limited to 12bits */ -/* 2. The key is 12 bits Prefix code + 8 bit new char or 20 bits. */ -/* The key is the upper 20 bits. The code is the lower 12. */ -#define HT_GET_KEY(l) (l >> 12) -#define HT_GET_CODE(l) (l & 0x0FFF) -#define HT_PUT_KEY(l) (l << 12) -#define HT_PUT_CODE(l) (l & 0x0FFF) - -typedef struct GifHashTableType { - UINT32 HTable[HT_SIZE]; -} GifHashTableType; - -GifHashTableType *_InitHashTable(void); -void _ClearHashTable(GifHashTableType *HashTable); -void _InsertHashTable(GifHashTableType *HashTable, UINT32 Key, int Code); -int _ExistsHashTable(GifHashTableType *HashTable, UINT32 Key); - -#endif /* _GIF_HASH_H_ */ diff --git a/gif_lib.h b/gif_lib.h deleted file mode 100644 index f0cf858..0000000 --- a/gif_lib.h +++ /dev/null @@ -1,336 +0,0 @@ -/****************************************************************************** - * In order to make life a little bit easier when using the GIF file format, - * this library was written, and which does all the dirty work... - * - * Written by Gershon Elber, Jun. 1989 - * Hacks by Eric S. Raymond, Sep. 1992 - ****************************************************************************** - * History: - * 14 Jun 89 - Version 1.0 by Gershon Elber. - * 3 Sep 90 - Version 1.1 by Gershon Elber (Support for Gif89, Unique names) - * 15 Sep 90 - Version 2.0 by Eric S. Raymond (Changes to suoport GIF slurp) - * 26 Jun 96 - Version 3.0 by Eric S. Raymond (Full GIF89 support) - * 17 Dec 98 - Version 4.0 by Toshio Kuratomi (Fix extension writing code) - *****************************************************************************/ - -#ifndef _GIF_LIB_H_ -#define _GIF_LIB_H_ 1 - -#ifdef __cplusplus -extern "C" { -#endif /* __cplusplus */ - -#define GIF_LIB_VERSION " Version 4.1, " - -#define GIF_ERROR 0 -#define GIF_OK 1 - -#ifndef TRUE -#define TRUE 1 -#endif /* TRUE */ -#ifndef FALSE -#define FALSE 0 -#endif /* FALSE */ - -#ifndef NULL -#define NULL 0 -#endif /* NULL */ - -#define GIF_STAMP "GIFVER" /* First chars in file - GIF stamp. */ -#define GIF_STAMP_LEN sizeof(GIF_STAMP) - 1 -#define GIF_VERSION_POS 3 /* Version first character in stamp. */ -#define GIF87_STAMP "GIF87a" /* First chars in file - GIF stamp. */ -#define GIF89_STAMP "GIF89a" /* First chars in file - GIF stamp. */ - -#define GIF_FILE_BUFFER_SIZE 16384 /* Files uses bigger buffers than usual. */ - -typedef int GifBooleanType; -typedef unsigned char GifPixelType; -typedef unsigned char *GifRowType; -typedef unsigned char GifByteType; -#ifdef _GBA_OPTMEM - typedef unsigned short GifPrefixType; - typedef short GifWord; -#else - typedef unsigned int GifPrefixType; - typedef int GifWord; -#endif - -#define GIF_MESSAGE(Msg) fprintf(stderr, "\n%s: %s\n", PROGRAM_NAME, Msg) -#define GIF_EXIT(Msg) { GIF_MESSAGE(Msg); exit(-3); } - -#ifdef SYSV -#define VoidPtr char * -#else -#define VoidPtr void * -#endif /* SYSV */ - -typedef struct GifColorType { - GifByteType Red, Green, Blue; -} GifColorType; - -typedef struct ColorMapObject { - int ColorCount; - int BitsPerPixel; - GifColorType *Colors; /* on malloc(3) heap */ -} ColorMapObject; - -typedef struct GifImageDesc { - GifWord Left, Top, Width, Height, /* Current image dimensions. */ - Interlace; /* Sequential/Interlaced lines. */ - ColorMapObject *ColorMap; /* The local color map */ -} GifImageDesc; - -typedef struct GifFileType { - GifWord SWidth, SHeight, /* Screen dimensions. */ - SColorResolution, /* How many colors can we generate? */ - SBackGroundColor; /* I hope you understand this one... */ - ColorMapObject *SColorMap; /* NULL if not exists. */ - int ImageCount; /* Number of current image */ - GifImageDesc Image; /* Block describing current image */ - struct SavedImage *SavedImages; /* Use this to accumulate file state */ - VoidPtr UserData; /* hook to attach user data (TVT) */ - VoidPtr Private; /* Don't mess with this! */ -} GifFileType; - -typedef enum { - UNDEFINED_RECORD_TYPE, - SCREEN_DESC_RECORD_TYPE, - IMAGE_DESC_RECORD_TYPE, /* Begin with ',' */ - EXTENSION_RECORD_TYPE, /* Begin with '!' */ - TERMINATE_RECORD_TYPE /* Begin with ';' */ -} GifRecordType; - -/* DumpScreen2Gif routine constants identify type of window/screen to dump. - * Note all values below 1000 are reserved for the IBMPC different display - * devices (it has many!) and are compatible with the numbering TC2.0 - * (Turbo C 2.0 compiler for IBM PC) gives to these devices. - */ -typedef enum { - GIF_DUMP_SGI_WINDOW = 1000, - GIF_DUMP_X_WINDOW = 1001 -} GifScreenDumpType; - -/* func type to read gif data from arbitrary sources (TVT) */ -typedef int (*InputFunc) (GifFileType *, GifByteType *, int); - -/* func type to write gif data ro arbitrary targets. - * Returns count of bytes written. (MRB) - */ -typedef int (*OutputFunc) (GifFileType *, const GifByteType *, int); - -/****************************************************************************** - * GIF89 extension function codes -******************************************************************************/ - -#define COMMENT_EXT_FUNC_CODE 0xfe /* comment */ -#define GRAPHICS_EXT_FUNC_CODE 0xf9 /* graphics control */ -#define PLAINTEXT_EXT_FUNC_CODE 0x01 /* plaintext */ -#define APPLICATION_EXT_FUNC_CODE 0xff /* application block */ - -/****************************************************************************** - * O.K., here are the routines one can access in order to encode GIF file: - * (GIF_LIB file EGIF_LIB.C). -******************************************************************************/ - -GifFileType *EGifOpenFileName(const char *GifFileName, - int GifTestExistance); -GifFileType *EGifOpenFileHandle(int GifFileHandle); -GifFileType *EGifOpen(void *userPtr, OutputFunc writeFunc); - -int EGifSpew(GifFileType * GifFile); -void EGifSetGifVersion(const char *Version); -int EGifPutScreenDesc(GifFileType * GifFile, - int GifWidth, int GifHeight, int GifColorRes, - int GifBackGround, - const ColorMapObject * GifColorMap); -int EGifPutImageDesc(GifFileType * GifFile, int GifLeft, int GifTop, - int Width, int GifHeight, int GifInterlace, - const ColorMapObject * GifColorMap); -int EGifPutLine(GifFileType * GifFile, GifPixelType * GifLine, - int GifLineLen); -int EGifPutPixel(GifFileType * GifFile, GifPixelType GifPixel); -int EGifPutComment(GifFileType * GifFile, const char *GifComment); -int EGifPutExtensionFirst(GifFileType * GifFile, int GifExtCode, - int GifExtLen, const VoidPtr GifExtension); -int EGifPutExtensionNext(GifFileType * GifFile, int GifExtCode, - int GifExtLen, const VoidPtr GifExtension); -int EGifPutExtensionLast(GifFileType * GifFile, int GifExtCode, - int GifExtLen, const VoidPtr GifExtension); -int EGifPutExtension(GifFileType * GifFile, int GifExtCode, int GifExtLen, - const VoidPtr GifExtension); -int EGifPutCode(GifFileType * GifFile, int GifCodeSize, - const GifByteType * GifCodeBlock); -int EGifPutCodeNext(GifFileType * GifFile, - const GifByteType * GifCodeBlock); -int EGifCloseFile(GifFileType * GifFile); - -#define E_GIF_ERR_OPEN_FAILED 1 /* And EGif possible errors. */ -#define E_GIF_ERR_WRITE_FAILED 2 -#define E_GIF_ERR_HAS_SCRN_DSCR 3 -#define E_GIF_ERR_HAS_IMAG_DSCR 4 -#define E_GIF_ERR_NO_COLOR_MAP 5 -#define E_GIF_ERR_DATA_TOO_BIG 6 -#define E_GIF_ERR_NOT_ENOUGH_MEM 7 -#define E_GIF_ERR_DISK_IS_FULL 8 -#define E_GIF_ERR_CLOSE_FAILED 9 -#define E_GIF_ERR_NOT_WRITEABLE 10 - -/****************************************************************************** - * O.K., here are the routines one can access in order to decode GIF file: - * (GIF_LIB file DGIF_LIB.C). - *****************************************************************************/ -#ifndef _GBA_NO_FILEIO -GifFileType *DGifOpenFileName(const char *GifFileName); -GifFileType *DGifOpenFileHandle(int GifFileHandle); -int DGifSlurp(GifFileType * GifFile); -#endif /* _GBA_NO_FILEIO */ -GifFileType *DGifOpen(void *userPtr, InputFunc readFunc); /* new one - * (TVT) */ -int DGifGetScreenDesc(GifFileType * GifFile); -int DGifGetRecordType(GifFileType * GifFile, GifRecordType * GifType); -int DGifGetImageDesc(GifFileType * GifFile); -int DGifGetLine(GifFileType * GifFile, GifPixelType * GifLine, int GifLineLen); -int DGifGetPixel(GifFileType * GifFile, GifPixelType GifPixel); -int DGifGetComment(GifFileType * GifFile, char *GifComment); -int DGifGetExtension(GifFileType * GifFile, int *GifExtCode, - GifByteType ** GifExtension); -int DGifGetExtensionNext(GifFileType * GifFile, GifByteType ** GifExtension); -int DGifGetCode(GifFileType * GifFile, int *GifCodeSize, - GifByteType ** GifCodeBlock); -int DGifGetCodeNext(GifFileType * GifFile, GifByteType ** GifCodeBlock); -int DGifGetLZCodes(GifFileType * GifFile, int *GifCode); -int DGifCloseFile(GifFileType * GifFile); - -#define D_GIF_ERR_OPEN_FAILED 101 /* And DGif possible errors. */ -#define D_GIF_ERR_READ_FAILED 102 -#define D_GIF_ERR_NOT_GIF_FILE 103 -#define D_GIF_ERR_NO_SCRN_DSCR 104 -#define D_GIF_ERR_NO_IMAG_DSCR 105 -#define D_GIF_ERR_NO_COLOR_MAP 106 -#define D_GIF_ERR_WRONG_RECORD 107 -#define D_GIF_ERR_DATA_TOO_BIG 108 -#define D_GIF_ERR_NOT_ENOUGH_MEM 109 -#define D_GIF_ERR_CLOSE_FAILED 110 -#define D_GIF_ERR_NOT_READABLE 111 -#define D_GIF_ERR_IMAGE_DEFECT 112 -#define D_GIF_ERR_EOF_TOO_SOON 113 - -/****************************************************************************** - * O.K., here are the routines from GIF_LIB file QUANTIZE.C. -******************************************************************************/ -int QuantizeBuffer(unsigned int Width, unsigned int Height, - int *ColorMapSize, GifByteType * RedInput, - GifByteType * GreenInput, GifByteType * BlueInput, - GifByteType * OutputBuffer, - GifColorType * OutputColorMap); - -/****************************************************************************** - * O.K., here are the routines from GIF_LIB file QPRINTF.C. -******************************************************************************/ -extern int GifQuietPrint; - -#ifdef HAVE_STDARG_H - extern void GifQprintf(char *Format, ...); -#elif defined (HAVE_VARARGS_H) - extern void GifQprintf(); -#endif /* HAVE_STDARG_H */ - -/****************************************************************************** - * O.K., here are the routines from GIF_LIB file GIF_ERR.C. -******************************************************************************/ -#ifndef _GBA_NO_FILEIO -extern void PrintGifError(void); -#endif /* _GBA_NO_FILEIO */ -extern int GifLastError(void); - -/****************************************************************************** - * O.K., here are the routines from GIF_LIB file DEV2GIF.C. -******************************************************************************/ -extern int DumpScreen2Gif(const char *FileName, - int ReqGraphDriver, - long ReqGraphMode1, - long ReqGraphMode2, - long ReqGraphMode3); - -/***************************************************************************** - * - * Everything below this point is new after version 1.2, supporting `slurp - * mode' for doing I/O in two big belts with all the image-bashing in core. - * - *****************************************************************************/ - -/****************************************************************************** - * Color Map handling from ALLOCGIF.C - *****************************************************************************/ - -extern ColorMapObject *MakeMapObject(int ColorCount, - const GifColorType * ColorMap); -extern void FreeMapObject(ColorMapObject * Object); -extern ColorMapObject *UnionColorMap(const ColorMapObject * ColorIn1, - const ColorMapObject * ColorIn2, - GifPixelType ColorTransIn2[]); -extern int BitSize(int n); - -/****************************************************************************** - * Support for the in-core structures allocation (slurp mode). - *****************************************************************************/ - -/* This is the in-core version of an extension record */ -typedef struct { - int ByteCount; - char *Bytes; /* on malloc(3) heap */ - int Function; /* Holds the type of the Extension block. */ -} ExtensionBlock; - -/* This holds an image header, its unpacked raster bits, and extensions */ -typedef struct SavedImage { - GifImageDesc ImageDesc; - unsigned char *RasterBits; /* on malloc(3) heap */ - int Function; /* DEPRECATED: Use ExtensionBlocks[x].Function instead */ - int ExtensionBlockCount; - ExtensionBlock *ExtensionBlocks; /* on malloc(3) heap */ -} SavedImage; - -extern void ApplyTranslation(SavedImage * Image, GifPixelType Translation[]); -extern void MakeExtension(SavedImage * New, int Function); -extern int AddExtensionBlock(SavedImage * New, int Len, - unsigned char ExtData[]); -extern void FreeExtension(SavedImage * Image); -extern SavedImage *MakeSavedImage(GifFileType * GifFile, - const SavedImage * CopyFrom); -extern void FreeSavedImages(GifFileType * GifFile); - -/****************************************************************************** - * The library's internal utility font - *****************************************************************************/ - -#define GIF_FONT_WIDTH 8 -#define GIF_FONT_HEIGHT 8 -extern unsigned char AsciiTable[][GIF_FONT_WIDTH]; - -#ifdef _WIN32 - extern void DrawGifText(SavedImage * Image, -#else - extern void DrawGifText(SavedImage * Image, -#endif - const int x, const int y, - const char *legend, const int color); - -extern void DrawBox(SavedImage * Image, - const int x, const int y, - const int w, const int d, const int color); - -void DrawRectangle(SavedImage * Image, - const int x, const int y, - const int w, const int d, const int color); - -extern void DrawBoxedText(SavedImage * Image, - const int x, const int y, - const char *legend, - const int border, const int bg, const int fg); - -#ifdef __cplusplus -} -#endif /* __cplusplus */ -#endif /* _GIF_LIB_H */ diff --git a/gif_lib_private.h b/gif_lib_private.h deleted file mode 100644 index b31c9c5..0000000 --- a/gif_lib_private.h +++ /dev/null @@ -1,59 +0,0 @@ -#ifndef _GIF_LIB_PRIVATE_H -#define _GIF_LIB_PRIVATE_H - -#include "gif_lib.h" -#include "gif_hash.h" - -#define PROGRAM_NAME "GIFLIB" - -#ifdef SYSV -#define VersionStr "Gif library module,\t\tEric S. Raymond\n\ - (C) Copyright 1997 Eric S. Raymond\n" -#else -#define VersionStr PROGRAM_NAME " IBMPC " GIF_LIB_VERSION \ - " Eric S. Raymond, " __DATE__ ", " \ - __TIME__ "\n" "(C) Copyright 1997 Eric S. Raymond\n" -#endif /* SYSV */ - -#define LZ_MAX_CODE 4095 /* Biggest code possible in 12 bits. */ -#define LZ_BITS 12 - -#define FLUSH_OUTPUT 4096 /* Impossible code, to signal flush. */ -#define FIRST_CODE 4097 /* Impossible code, to signal first. */ -#define NO_SUCH_CODE 4098 /* Impossible code, to signal empty. */ - -#define FILE_STATE_WRITE 0x01 -#define FILE_STATE_SCREEN 0x02 -#define FILE_STATE_IMAGE 0x04 -#define FILE_STATE_READ 0x08 - -#define IS_READABLE(Private) (Private->FileState & FILE_STATE_READ) -#define IS_WRITEABLE(Private) (Private->FileState & FILE_STATE_WRITE) - -typedef struct GifFilePrivateType { - GifWord FileState, FileHandle, /* Where all this data goes to! */ - BitsPerPixel, /* Bits per pixel (Codes uses at least this + 1). */ - ClearCode, /* The CLEAR LZ code. */ - EOFCode, /* The EOF LZ code. */ - RunningCode, /* The next code algorithm can generate. */ - RunningBits, /* The number of bits required to represent RunningCode. */ - MaxCode1, /* 1 bigger than max. possible code, in RunningBits bits. */ - LastCode, /* The code before the current code. */ - CrntCode, /* Current algorithm code. */ - StackPtr, /* For character stack (see below). */ - CrntShiftState; /* Number of bits in CrntShiftDWord. */ - unsigned long CrntShiftDWord; /* For bytes decomposition into codes. */ - unsigned long PixelCount; /* Number of pixels in image. */ - FILE *File; /* File as stream. */ - InputFunc Read; /* function to read gif input (TVT) */ - OutputFunc Write; /* function to write gif output (MRB) */ - GifByteType Buf[256]; /* Compressed input is buffered here. */ - GifByteType Stack[LZ_MAX_CODE]; /* Decoded pixels are stacked here. */ - GifByteType Suffix[LZ_MAX_CODE + 1]; /* So we can trace the codes. */ - GifPrefixType Prefix[LZ_MAX_CODE + 1]; - GifHashTableType *HashTable; -} GifFilePrivateType; - -extern int _GifError; - -#endif /* _GIF_LIB_PRIVATE_H */ diff --git a/gifalloc.c b/gifalloc.c deleted file mode 100644 index 79d2332..0000000 --- a/gifalloc.c +++ /dev/null @@ -1,443 +0,0 @@ -/***************************************************************************** - * "Gif-Lib" - Yet another gif library. - * - * Written by: Gershon Elber Ver 0.1, Jun. 1989 - * Extensively hacked by: Eric S. Raymond Ver 1.?, Sep 1992 - ***************************************************************************** - * GIF construction tools - ***************************************************************************** - * History: - * 15 Sep 92 - Version 1.0 by Eric Raymond. - ****************************************************************************/ - -#ifdef HAVE_CONFIG_H -#include -#endif - -#include -#include -#include -#include "gif_lib.h" - -#define MAX(x, y) (((x) > (y)) ? (x) : (y)) - -/****************************************************************************** - * Miscellaneous utility functions - *****************************************************************************/ - -/* return smallest bitfield size n will fit in */ -int -BitSize(int n) { - - register int i; - - for (i = 1; i <= 8; i++) - if ((1 << i) >= n) - break; - return (i); -} - -/****************************************************************************** - * Color map object functions - *****************************************************************************/ - -/* - * Allocate a color map of given size; initialize with contents of - * ColorMap if that pointer is non-NULL. - */ -ColorMapObject * -MakeMapObject(int ColorCount, - const GifColorType * ColorMap) { - - ColorMapObject *Object; - - /*** FIXME: Our ColorCount has to be a power of two. Is it necessary to - * make the user know that or should we automatically round up instead? */ - if (ColorCount != (1 << BitSize(ColorCount))) { - return ((ColorMapObject *) NULL); - } - - Object = (ColorMapObject *)malloc(sizeof(ColorMapObject)); - if (Object == (ColorMapObject *) NULL) { - return ((ColorMapObject *) NULL); - } - - Object->Colors = (GifColorType *)calloc(ColorCount, sizeof(GifColorType)); - if (Object->Colors == (GifColorType *) NULL) { - return ((ColorMapObject *) NULL); - } - - Object->ColorCount = ColorCount; - Object->BitsPerPixel = BitSize(ColorCount); - - if (ColorMap) { - memcpy((char *)Object->Colors, - (char *)ColorMap, ColorCount * sizeof(GifColorType)); - } - - return (Object); -} - -/* - * Free a color map object - */ -void -FreeMapObject(ColorMapObject * Object) { - - if (Object != NULL) { - free(Object->Colors); - free(Object); - /*** FIXME: - * When we are willing to break API we need to make this function - * FreeMapObject(ColorMapObject **Object) - * and do this assignment to NULL here: - * *Object = NULL; - */ - } -} - -#ifdef DEBUG -void -DumpColorMap(ColorMapObject * Object, - FILE * fp) { - - if (Object) { - int i, j, Len = Object->ColorCount; - - for (i = 0; i < Len; i += 4) { - for (j = 0; j < 4 && j < Len; j++) { - fprintf(fp, "%3d: %02x %02x %02x ", i + j, - Object->Colors[i + j].Red, - Object->Colors[i + j].Green, - Object->Colors[i + j].Blue); - } - fprintf(fp, "\n"); - } - } -} -#endif /* DEBUG */ - -/* - * Compute the union of two given color maps and return it. If result can't - * fit into 256 colors, NULL is returned, the allocated union otherwise. - * ColorIn1 is copied as is to ColorUnion, while colors from ColorIn2 are - * copied iff they didn't exist before. ColorTransIn2 maps the old - * ColorIn2 into ColorUnion color map table. - */ -ColorMapObject * -UnionColorMap(const ColorMapObject * ColorIn1, - const ColorMapObject * ColorIn2, - GifPixelType ColorTransIn2[]) { - - int i, j, CrntSlot, RoundUpTo, NewBitSize; - ColorMapObject *ColorUnion; - - /* - * Allocate table which will hold the result for sure. - */ - ColorUnion = MakeMapObject(MAX(ColorIn1->ColorCount, - ColorIn2->ColorCount) * 2, NULL); - - if (ColorUnion == NULL) - return (NULL); - - /* Copy ColorIn1 to ColorUnionSize; */ - /*** FIXME: What if there are duplicate entries into the colormap to begin - * with? */ - for (i = 0; i < ColorIn1->ColorCount; i++) - ColorUnion->Colors[i] = ColorIn1->Colors[i]; - CrntSlot = ColorIn1->ColorCount; - - /* - * Potentially obnoxious hack: - * - * Back CrntSlot down past all contiguous {0, 0, 0} slots at the end - * of table 1. This is very useful if your display is limited to - * 16 colors. - */ - while (ColorIn1->Colors[CrntSlot - 1].Red == 0 - && ColorIn1->Colors[CrntSlot - 1].Green == 0 - && ColorIn1->Colors[CrntSlot - 1].Blue == 0) - CrntSlot--; - - /* Copy ColorIn2 to ColorUnionSize (use old colors if they exist): */ - for (i = 0; i < ColorIn2->ColorCount && CrntSlot <= 256; i++) { - /* Let's see if this color already exists: */ - /*** FIXME: Will it ever occur that ColorIn2 will contain duplicate - * entries? So we should search from 0 to CrntSlot rather than - * ColorIn1->ColorCount? - */ - for (j = 0; j < ColorIn1->ColorCount; j++) - if (memcmp (&ColorIn1->Colors[j], &ColorIn2->Colors[i], - sizeof(GifColorType)) == 0) - break; - - if (j < ColorIn1->ColorCount) - ColorTransIn2[i] = j; /* color exists in Color1 */ - else { - /* Color is new - copy it to a new slot: */ - ColorUnion->Colors[CrntSlot] = ColorIn2->Colors[i]; - ColorTransIn2[i] = CrntSlot++; - } - } - - if (CrntSlot > 256) { - FreeMapObject(ColorUnion); - return ((ColorMapObject *) NULL); - } - - NewBitSize = BitSize(CrntSlot); - RoundUpTo = (1 << NewBitSize); - - if (RoundUpTo != ColorUnion->ColorCount) { - register GifColorType *Map = ColorUnion->Colors; - - /* - * Zero out slots up to next power of 2. - * We know these slots exist because of the way ColorUnion's - * start dimension was computed. - */ - for (j = CrntSlot; j < RoundUpTo; j++) - Map[j].Red = Map[j].Green = Map[j].Blue = 0; - - /* perhaps we can shrink the map? */ - if (RoundUpTo < ColorUnion->ColorCount) - ColorUnion->Colors = (GifColorType *)realloc(Map, - sizeof(GifColorType) * RoundUpTo); - } - - ColorUnion->ColorCount = RoundUpTo; - ColorUnion->BitsPerPixel = NewBitSize; - - return (ColorUnion); -} - -/* - * Apply a given color translation to the raster bits of an image - */ -void -ApplyTranslation(SavedImage * Image, - GifPixelType Translation[]) { - - register int i; - register int RasterSize = Image->ImageDesc.Height * Image->ImageDesc.Width; - - for (i = 0; i < RasterSize; i++) - Image->RasterBits[i] = Translation[Image->RasterBits[i]]; -} - -/****************************************************************************** - * Extension record functions - *****************************************************************************/ - -void -MakeExtension(SavedImage * New, - int Function) { - - New->Function = Function; - /*** FIXME: - * Someday we might have to deal with multiple extensions. - * ??? Was this a note from Gershon or from me? Does the multiple - * extension blocks solve this or do we need multiple Functions? Or is - * this an obsolete function? (People should use AddExtensionBlock - * instead?) - * Looks like AddExtensionBlock needs to take the int Function argument - * then it can take the place of this function. Right now people have to - * use both. Fix AddExtensionBlock and add this to the deprecation list. - */ -} - -int -AddExtensionBlock(SavedImage * New, - int Len, - unsigned char ExtData[]) { - - ExtensionBlock *ep; - - if (New->ExtensionBlocks == NULL) - New->ExtensionBlocks=(ExtensionBlock *)malloc(sizeof(ExtensionBlock)); - else - New->ExtensionBlocks = (ExtensionBlock *)realloc(New->ExtensionBlocks, - sizeof(ExtensionBlock) * - (New->ExtensionBlockCount + 1)); - - if (New->ExtensionBlocks == NULL) - return (GIF_ERROR); - - ep = &New->ExtensionBlocks[New->ExtensionBlockCount++]; - - ep->ByteCount=Len; - ep->Bytes = (char *)malloc(ep->ByteCount); - if (ep->Bytes == NULL) - return (GIF_ERROR); - - if (ExtData) { - memcpy(ep->Bytes, ExtData, Len); - ep->Function = New->Function; - } - - return (GIF_OK); -} - -void -FreeExtension(SavedImage * Image) -{ - ExtensionBlock *ep; - - if ((Image == NULL) || (Image->ExtensionBlocks == NULL)) { - return; - } - for (ep = Image->ExtensionBlocks; - ep < (Image->ExtensionBlocks + Image->ExtensionBlockCount); ep++) - (void)free((char *)ep->Bytes); - free((char *)Image->ExtensionBlocks); - Image->ExtensionBlocks = NULL; -} - -/****************************************************************************** - * Image block allocation functions -******************************************************************************/ - -/* Private Function: - * Frees the last image in the GifFile->SavedImages array - */ -void -FreeLastSavedImage(GifFileType *GifFile) { - - SavedImage *sp; - - if ((GifFile == NULL) || (GifFile->SavedImages == NULL)) - return; - - /* Remove one SavedImage from the GifFile */ - GifFile->ImageCount--; - sp = &GifFile->SavedImages[GifFile->ImageCount]; - - /* Deallocate its Colormap */ - if (sp->ImageDesc.ColorMap) { - FreeMapObject(sp->ImageDesc.ColorMap); - sp->ImageDesc.ColorMap = NULL; - } - - /* Deallocate the image data */ - if (sp->RasterBits) - free((char *)sp->RasterBits); - - /* Deallocate any extensions */ - if (sp->ExtensionBlocks) - FreeExtension(sp); - - /*** FIXME: We could realloc the GifFile->SavedImages structure but is - * there a point to it? Saves some memory but we'd have to do it every - * time. If this is used in FreeSavedImages then it would be inefficient - * (The whole array is going to be deallocated.) If we just use it when - * we want to free the last Image it's convenient to do it here. - */ -} - -/* - * Append an image block to the SavedImages array - */ -SavedImage * -MakeSavedImage(GifFileType * GifFile, - const SavedImage * CopyFrom) { - - SavedImage *sp; - - if (GifFile->SavedImages == NULL) - GifFile->SavedImages = (SavedImage *)malloc(sizeof(SavedImage)); - else - GifFile->SavedImages = (SavedImage *)realloc(GifFile->SavedImages, - sizeof(SavedImage) * (GifFile->ImageCount + 1)); - - if (GifFile->SavedImages == NULL) - return ((SavedImage *)NULL); - else { - sp = &GifFile->SavedImages[GifFile->ImageCount++]; - memset((char *)sp, '\0', sizeof(SavedImage)); - - if (CopyFrom) { - memcpy((char *)sp, CopyFrom, sizeof(SavedImage)); - - /* - * Make our own allocated copies of the heap fields in the - * copied record. This guards against potential aliasing - * problems. - */ - - /* first, the local color map */ - if (sp->ImageDesc.ColorMap) { - sp->ImageDesc.ColorMap = MakeMapObject( - CopyFrom->ImageDesc.ColorMap->ColorCount, - CopyFrom->ImageDesc.ColorMap->Colors); - if (sp->ImageDesc.ColorMap == NULL) { - FreeLastSavedImage(GifFile); - return (SavedImage *)(NULL); - } - } - - /* next, the raster */ - sp->RasterBits = (unsigned char *)malloc(sizeof(GifPixelType) * - CopyFrom->ImageDesc.Height * - CopyFrom->ImageDesc.Width); - if (sp->RasterBits == NULL) { - FreeLastSavedImage(GifFile); - return (SavedImage *)(NULL); - } - memcpy(sp->RasterBits, CopyFrom->RasterBits, - sizeof(GifPixelType) * CopyFrom->ImageDesc.Height * - CopyFrom->ImageDesc.Width); - - /* finally, the extension blocks */ - if (sp->ExtensionBlocks) { - sp->ExtensionBlocks = (ExtensionBlock *)malloc( - sizeof(ExtensionBlock) * - CopyFrom->ExtensionBlockCount); - if (sp->ExtensionBlocks == NULL) { - FreeLastSavedImage(GifFile); - return (SavedImage *)(NULL); - } - memcpy(sp->ExtensionBlocks, CopyFrom->ExtensionBlocks, - sizeof(ExtensionBlock) * CopyFrom->ExtensionBlockCount); - - /* - * For the moment, the actual blocks can take their - * chances with free(). We'll fix this later. - *** FIXME: [Better check this out... Toshio] - * 2004 May 27: Looks like this was an ESR note. - * It means the blocks are shallow copied from InFile to - * OutFile. However, I don't see that in this code.... - * Did ESR fix it but never remove this note (And other notes - * in gifspnge?) - */ - } - } - - return (sp); - } -} - -void -FreeSavedImages(GifFileType * GifFile) { - - SavedImage *sp; - - if ((GifFile == NULL) || (GifFile->SavedImages == NULL)) { - return; - } - for (sp = GifFile->SavedImages; - sp < GifFile->SavedImages + GifFile->ImageCount; sp++) { - if (sp->ImageDesc.ColorMap) { - FreeMapObject(sp->ImageDesc.ColorMap); - sp->ImageDesc.ColorMap = NULL; - } - - if (sp->RasterBits) - free((char *)sp->RasterBits); - - if (sp->ExtensionBlocks) - FreeExtension(sp); - } - free((char *)GifFile->SavedImages); - GifFile->SavedImages=NULL; -} -- cgit v1.2.3 From c2eacaec90baee57fdbbdbad935d161638894ee7 Mon Sep 17 00:00:00 2001 From: The Android Open Source Project Date: Tue, 3 Mar 2009 19:29:32 -0800 Subject: auto import from //depot/cupcake/@135843 --- Android.mk | 13 + config.h | 13 + dgif_lib.c | 1098 +++++++++++++++++++++++++++++++++++++++++++++++++++++ gif_err.c | 120 ++++++ gif_hash.h | 59 +++ gif_lib.h | 336 ++++++++++++++++ gif_lib_private.h | 59 +++ gifalloc.c | 443 +++++++++++++++++++++ 8 files changed, 2141 insertions(+) create mode 100644 Android.mk create mode 100644 config.h create mode 100644 dgif_lib.c create mode 100644 gif_err.c create mode 100644 gif_hash.h create mode 100644 gif_lib.h create mode 100644 gif_lib_private.h create mode 100644 gifalloc.c diff --git a/Android.mk b/Android.mk new file mode 100644 index 0000000..2453314 --- /dev/null +++ b/Android.mk @@ -0,0 +1,13 @@ +LOCAL_PATH:= $(call my-dir) +include $(CLEAR_VARS) + +LOCAL_SRC_FILES := \ + dgif_lib.c \ + gifalloc.c \ + gif_err.c + +LOCAL_CFLAGS += -Wno-format -DHAVE_CONFIG_H + +LOCAL_MODULE:= libgif + +include $(BUILD_STATIC_LIBRARY) diff --git a/config.h b/config.h new file mode 100644 index 0000000..3193a1b --- /dev/null +++ b/config.h @@ -0,0 +1,13 @@ + +// giflib config.h + +#ifndef GIF_CONFIG_H_DEFINED +#define GIF_CONFIG_H_DEFINED + +#include +#include +#include + +typedef uint32_t UINT32; + +#endif diff --git a/dgif_lib.c b/dgif_lib.c new file mode 100644 index 0000000..760d053 --- /dev/null +++ b/dgif_lib.c @@ -0,0 +1,1098 @@ +/****************************************************************************** + * "Gif-Lib" - Yet another gif library. + * + * Written by: Gershon Elber IBM PC Ver 1.1, Aug. 1990 + ****************************************************************************** + * The kernel of the GIF Decoding process can be found here. + ****************************************************************************** + * History: + * 16 Jun 89 - Version 1.0 by Gershon Elber. + * 3 Sep 90 - Version 1.1 by Gershon Elber (Support for Gif89, Unique names). + *****************************************************************************/ + +#ifdef HAVE_CONFIG_H +#include +#endif + +#include +#if defined (__MSDOS__) && !defined(__DJGPP__) && !defined(__GNUC__) +#include +#include +#include +#else +#include +#include +#endif /* __MSDOS__ */ + +#ifdef HAVE_IO_H +#include +#endif + +#ifdef HAVE_FCNTL_H +#include +#endif /* HAVE_FCNTL_H */ +#ifdef HAVE_UNISTD_H +#include +#endif /* HAVE_UNISTD_H */ +#include +#include +#include "gif_lib.h" +#include "gif_lib_private.h" + +#define COMMENT_EXT_FUNC_CODE 0xfe /* Extension function code for + comment. */ + +/* avoid extra function call in case we use fread (TVT) */ +#define READ(_gif,_buf,_len) \ + (((GifFilePrivateType*)_gif->Private)->Read ? \ + ((GifFilePrivateType*)_gif->Private)->Read(_gif,_buf,_len) : \ + fread(_buf,1,_len,((GifFilePrivateType*)_gif->Private)->File)) + +static int DGifGetWord(GifFileType *GifFile, GifWord *Word); +static int DGifSetupDecompress(GifFileType *GifFile); +static int DGifDecompressLine(GifFileType *GifFile, GifPixelType *Line, + int LineLen); +static int DGifGetPrefixChar(GifPrefixType *Prefix, int Code, int ClearCode); +static int DGifDecompressInput(GifFileType *GifFile, int *Code); +static int DGifBufferedInput(GifFileType *GifFile, GifByteType *Buf, + GifByteType *NextByte); +#ifndef _GBA_NO_FILEIO + +/****************************************************************************** + * Open a new gif file for read, given by its name. + * Returns GifFileType pointer dynamically allocated which serves as the gif + * info record. _GifError is cleared if succesfull. + *****************************************************************************/ +GifFileType * +DGifOpenFileName(const char *FileName) { + int FileHandle; + GifFileType *GifFile; + + if ((FileHandle = open(FileName, O_RDONLY +#if defined(__MSDOS__) || defined(WINDOWS32) || defined(_OPEN_BINARY) + | O_BINARY +#endif /* __MSDOS__ || _OPEN_BINARY */ + )) == -1) { + _GifError = D_GIF_ERR_OPEN_FAILED; + return NULL; + } + + GifFile = DGifOpenFileHandle(FileHandle); + return GifFile; +} + +/****************************************************************************** + * Update a new gif file, given its file handle. + * Returns GifFileType pointer dynamically allocated which serves as the gif + * info record. _GifError is cleared if succesfull. + *****************************************************************************/ +GifFileType * +DGifOpenFileHandle(int FileHandle) { + + unsigned char Buf[GIF_STAMP_LEN + 1]; + GifFileType *GifFile; + GifFilePrivateType *Private; + FILE *f; + + GifFile = (GifFileType *)malloc(sizeof(GifFileType)); + if (GifFile == NULL) { + _GifError = D_GIF_ERR_NOT_ENOUGH_MEM; + close(FileHandle); + return NULL; + } + + memset(GifFile, '\0', sizeof(GifFileType)); + + Private = (GifFilePrivateType *)malloc(sizeof(GifFilePrivateType)); + if (Private == NULL) { + _GifError = D_GIF_ERR_NOT_ENOUGH_MEM; + close(FileHandle); + free((char *)GifFile); + return NULL; + } +#if defined(__MSDOS__) || defined(WINDOWS32) || defined(_OPEN_BINARY) + setmode(FileHandle, O_BINARY); /* Make sure it is in binary mode. */ +#endif /* __MSDOS__ */ + + f = fdopen(FileHandle, "rb"); /* Make it into a stream: */ + +#if defined(__MSDOS__) || defined(WINDOWS32) + setvbuf(f, NULL, _IOFBF, GIF_FILE_BUFFER_SIZE); /* And inc. stream + buffer. */ +#endif /* __MSDOS__ */ + + GifFile->Private = (VoidPtr)Private; + Private->FileHandle = FileHandle; + Private->File = f; + Private->FileState = FILE_STATE_READ; + Private->Read = 0; /* don't use alternate input method (TVT) */ + GifFile->UserData = 0; /* TVT */ + + /* Lets see if this is a GIF file: */ + if (READ(GifFile, Buf, GIF_STAMP_LEN) != GIF_STAMP_LEN) { + _GifError = D_GIF_ERR_READ_FAILED; + fclose(f); + free((char *)Private); + free((char *)GifFile); + return NULL; + } + + /* The GIF Version number is ignored at this time. Maybe we should do + * something more useful with it. */ + Buf[GIF_STAMP_LEN] = 0; + if (strncmp(GIF_STAMP, Buf, GIF_VERSION_POS) != 0) { + _GifError = D_GIF_ERR_NOT_GIF_FILE; + fclose(f); + free((char *)Private); + free((char *)GifFile); + return NULL; + } + + if (DGifGetScreenDesc(GifFile) == GIF_ERROR) { + fclose(f); + free((char *)Private); + free((char *)GifFile); + return NULL; + } + + _GifError = 0; + + return GifFile; +} + +#endif /* _GBA_NO_FILEIO */ + +/****************************************************************************** + * GifFileType constructor with user supplied input function (TVT) + *****************************************************************************/ +GifFileType * +DGifOpen(void *userData, + InputFunc readFunc) { + + unsigned char Buf[GIF_STAMP_LEN + 1]; + GifFileType *GifFile; + GifFilePrivateType *Private; + + GifFile = (GifFileType *)malloc(sizeof(GifFileType)); + if (GifFile == NULL) { + _GifError = D_GIF_ERR_NOT_ENOUGH_MEM; + return NULL; + } + + memset(GifFile, '\0', sizeof(GifFileType)); + + Private = (GifFilePrivateType *)malloc(sizeof(GifFilePrivateType)); + if (!Private) { + _GifError = D_GIF_ERR_NOT_ENOUGH_MEM; + free((char *)GifFile); + return NULL; + } + + GifFile->Private = (VoidPtr)Private; + Private->FileHandle = 0; + Private->File = 0; + Private->FileState = FILE_STATE_READ; + + Private->Read = readFunc; /* TVT */ + GifFile->UserData = userData; /* TVT */ + + /* Lets see if this is a GIF file: */ + if (READ(GifFile, Buf, GIF_STAMP_LEN) != GIF_STAMP_LEN) { + _GifError = D_GIF_ERR_READ_FAILED; + free((char *)Private); + free((char *)GifFile); + return NULL; + } + + /* The GIF Version number is ignored at this time. Maybe we should do + * something more useful with it. */ + Buf[GIF_STAMP_LEN] = 0; + if (strncmp(GIF_STAMP, Buf, GIF_VERSION_POS) != 0) { + _GifError = D_GIF_ERR_NOT_GIF_FILE; + free((char *)Private); + free((char *)GifFile); + return NULL; + } + + if (DGifGetScreenDesc(GifFile) == GIF_ERROR) { + free((char *)Private); + free((char *)GifFile); + return NULL; + } + + _GifError = 0; + + return GifFile; +} + +/****************************************************************************** + * This routine should be called before any other DGif calls. Note that + * this routine is called automatically from DGif file open routines. + *****************************************************************************/ +int +DGifGetScreenDesc(GifFileType * GifFile) { + + int i, BitsPerPixel; + GifByteType Buf[3]; + GifFilePrivateType *Private = (GifFilePrivateType *)GifFile->Private; + + if (!IS_READABLE(Private)) { + /* This file was NOT open for reading: */ + _GifError = D_GIF_ERR_NOT_READABLE; + return GIF_ERROR; + } + + /* Put the screen descriptor into the file: */ + if (DGifGetWord(GifFile, &GifFile->SWidth) == GIF_ERROR || + DGifGetWord(GifFile, &GifFile->SHeight) == GIF_ERROR) + return GIF_ERROR; + + if (READ(GifFile, Buf, 3) != 3) { + _GifError = D_GIF_ERR_READ_FAILED; + return GIF_ERROR; + } + GifFile->SColorResolution = (((Buf[0] & 0x70) + 1) >> 4) + 1; + BitsPerPixel = (Buf[0] & 0x07) + 1; + GifFile->SBackGroundColor = Buf[1]; + if (Buf[0] & 0x80) { /* Do we have global color map? */ + + GifFile->SColorMap = MakeMapObject(1 << BitsPerPixel, NULL); + if (GifFile->SColorMap == NULL) { + _GifError = D_GIF_ERR_NOT_ENOUGH_MEM; + return GIF_ERROR; + } + + /* Get the global color map: */ + for (i = 0; i < GifFile->SColorMap->ColorCount; i++) { + if (READ(GifFile, Buf, 3) != 3) { + FreeMapObject(GifFile->SColorMap); + GifFile->SColorMap = NULL; + _GifError = D_GIF_ERR_READ_FAILED; + return GIF_ERROR; + } + GifFile->SColorMap->Colors[i].Red = Buf[0]; + GifFile->SColorMap->Colors[i].Green = Buf[1]; + GifFile->SColorMap->Colors[i].Blue = Buf[2]; + } + } else { + GifFile->SColorMap = NULL; + } + + return GIF_OK; +} + +/****************************************************************************** + * This routine should be called before any attempt to read an image. + *****************************************************************************/ +int +DGifGetRecordType(GifFileType * GifFile, + GifRecordType * Type) { + + GifByteType Buf; + GifFilePrivateType *Private = (GifFilePrivateType *)GifFile->Private; + + if (!IS_READABLE(Private)) { + /* This file was NOT open for reading: */ + _GifError = D_GIF_ERR_NOT_READABLE; + return GIF_ERROR; + } + + if (READ(GifFile, &Buf, 1) != 1) { + _GifError = D_GIF_ERR_READ_FAILED; + return GIF_ERROR; + } + + switch (Buf) { + case ',': + *Type = IMAGE_DESC_RECORD_TYPE; + break; + case '!': + *Type = EXTENSION_RECORD_TYPE; + break; + case ';': + *Type = TERMINATE_RECORD_TYPE; + break; + default: + *Type = UNDEFINED_RECORD_TYPE; + _GifError = D_GIF_ERR_WRONG_RECORD; + return GIF_ERROR; + } + + return GIF_OK; +} + +/****************************************************************************** + * This routine should be called before any attempt to read an image. + * Note it is assumed the Image desc. header (',') has been read. + *****************************************************************************/ +int +DGifGetImageDesc(GifFileType * GifFile) { + + int i, BitsPerPixel; + GifByteType Buf[3]; + GifFilePrivateType *Private = (GifFilePrivateType *)GifFile->Private; + SavedImage *sp; + + if (!IS_READABLE(Private)) { + /* This file was NOT open for reading: */ + _GifError = D_GIF_ERR_NOT_READABLE; + return GIF_ERROR; + } + + if (DGifGetWord(GifFile, &GifFile->Image.Left) == GIF_ERROR || + DGifGetWord(GifFile, &GifFile->Image.Top) == GIF_ERROR || + DGifGetWord(GifFile, &GifFile->Image.Width) == GIF_ERROR || + DGifGetWord(GifFile, &GifFile->Image.Height) == GIF_ERROR) + return GIF_ERROR; + if (READ(GifFile, Buf, 1) != 1) { + _GifError = D_GIF_ERR_READ_FAILED; + return GIF_ERROR; + } + BitsPerPixel = (Buf[0] & 0x07) + 1; + GifFile->Image.Interlace = (Buf[0] & 0x40); + if (Buf[0] & 0x80) { /* Does this image have local color map? */ + + /*** FIXME: Why do we check both of these in order to do this? + * Why do we have both Image and SavedImages? */ + if (GifFile->Image.ColorMap && GifFile->SavedImages == NULL) + FreeMapObject(GifFile->Image.ColorMap); + + GifFile->Image.ColorMap = MakeMapObject(1 << BitsPerPixel, NULL); + if (GifFile->Image.ColorMap == NULL) { + _GifError = D_GIF_ERR_NOT_ENOUGH_MEM; + return GIF_ERROR; + } + + /* Get the image local color map: */ + for (i = 0; i < GifFile->Image.ColorMap->ColorCount; i++) { + if (READ(GifFile, Buf, 3) != 3) { + FreeMapObject(GifFile->Image.ColorMap); + _GifError = D_GIF_ERR_READ_FAILED; + GifFile->Image.ColorMap = NULL; + return GIF_ERROR; + } + GifFile->Image.ColorMap->Colors[i].Red = Buf[0]; + GifFile->Image.ColorMap->Colors[i].Green = Buf[1]; + GifFile->Image.ColorMap->Colors[i].Blue = Buf[2]; + } + } else if (GifFile->Image.ColorMap) { + FreeMapObject(GifFile->Image.ColorMap); + GifFile->Image.ColorMap = NULL; + } + + if (GifFile->SavedImages) { + if ((GifFile->SavedImages = (SavedImage *)realloc(GifFile->SavedImages, + sizeof(SavedImage) * + (GifFile->ImageCount + 1))) == NULL) { + _GifError = D_GIF_ERR_NOT_ENOUGH_MEM; + return GIF_ERROR; + } + } else { + if ((GifFile->SavedImages = + (SavedImage *) malloc(sizeof(SavedImage))) == NULL) { + _GifError = D_GIF_ERR_NOT_ENOUGH_MEM; + return GIF_ERROR; + } + } + + sp = &GifFile->SavedImages[GifFile->ImageCount]; + memcpy(&sp->ImageDesc, &GifFile->Image, sizeof(GifImageDesc)); + if (GifFile->Image.ColorMap != NULL) { + sp->ImageDesc.ColorMap = MakeMapObject( + GifFile->Image.ColorMap->ColorCount, + GifFile->Image.ColorMap->Colors); + if (sp->ImageDesc.ColorMap == NULL) { + _GifError = D_GIF_ERR_NOT_ENOUGH_MEM; + return GIF_ERROR; + } + } + sp->RasterBits = (unsigned char *)NULL; + sp->ExtensionBlockCount = 0; + sp->ExtensionBlocks = (ExtensionBlock *) NULL; + + GifFile->ImageCount++; + + Private->PixelCount = (long)GifFile->Image.Width * + (long)GifFile->Image.Height; + + DGifSetupDecompress(GifFile); /* Reset decompress algorithm parameters. */ + + return GIF_OK; +} + +/****************************************************************************** + * Get one full scanned line (Line) of length LineLen from GIF file. + *****************************************************************************/ +int +DGifGetLine(GifFileType * GifFile, + GifPixelType * Line, + int LineLen) { + + GifByteType *Dummy; + GifFilePrivateType *Private = (GifFilePrivateType *) GifFile->Private; + + if (!IS_READABLE(Private)) { + /* This file was NOT open for reading: */ + _GifError = D_GIF_ERR_NOT_READABLE; + return GIF_ERROR; + } + + if (!LineLen) + LineLen = GifFile->Image.Width; + +#if defined(__MSDOS__) || defined(WINDOWS32) || defined(__GNUC__) + if ((Private->PixelCount -= LineLen) > 0xffff0000UL) { +#else + if ((Private->PixelCount -= LineLen) > 0xffff0000) { +#endif /* __MSDOS__ */ + _GifError = D_GIF_ERR_DATA_TOO_BIG; + return GIF_ERROR; + } + + if (DGifDecompressLine(GifFile, Line, LineLen) == GIF_OK) { + if (Private->PixelCount == 0) { + /* We probably would not be called any more, so lets clean + * everything before we return: need to flush out all rest of + * image until empty block (size 0) detected. We use GetCodeNext. */ + do + if (DGifGetCodeNext(GifFile, &Dummy) == GIF_ERROR) + return GIF_ERROR; + while (Dummy != NULL) ; + } + return GIF_OK; + } else + return GIF_ERROR; +} + +/****************************************************************************** + * Put one pixel (Pixel) into GIF file. + *****************************************************************************/ +int +DGifGetPixel(GifFileType * GifFile, + GifPixelType Pixel) { + + GifByteType *Dummy; + GifFilePrivateType *Private = (GifFilePrivateType *) GifFile->Private; + + if (!IS_READABLE(Private)) { + /* This file was NOT open for reading: */ + _GifError = D_GIF_ERR_NOT_READABLE; + return GIF_ERROR; + } +#if defined(__MSDOS__) || defined(WINDOWS32) || defined(__GNUC__) + if (--Private->PixelCount > 0xffff0000UL) +#else + if (--Private->PixelCount > 0xffff0000) +#endif /* __MSDOS__ */ + { + _GifError = D_GIF_ERR_DATA_TOO_BIG; + return GIF_ERROR; + } + + if (DGifDecompressLine(GifFile, &Pixel, 1) == GIF_OK) { + if (Private->PixelCount == 0) { + /* We probably would not be called any more, so lets clean + * everything before we return: need to flush out all rest of + * image until empty block (size 0) detected. We use GetCodeNext. */ + do + if (DGifGetCodeNext(GifFile, &Dummy) == GIF_ERROR) + return GIF_ERROR; + while (Dummy != NULL) ; + } + return GIF_OK; + } else + return GIF_ERROR; +} + +/****************************************************************************** + * Get an extension block (see GIF manual) from gif file. This routine only + * returns the first data block, and DGifGetExtensionNext should be called + * after this one until NULL extension is returned. + * The Extension should NOT be freed by the user (not dynamically allocated). + * Note it is assumed the Extension desc. header ('!') has been read. + *****************************************************************************/ +int +DGifGetExtension(GifFileType * GifFile, + int *ExtCode, + GifByteType ** Extension) { + + GifByteType Buf; + GifFilePrivateType *Private = (GifFilePrivateType *)GifFile->Private; + + if (!IS_READABLE(Private)) { + /* This file was NOT open for reading: */ + _GifError = D_GIF_ERR_NOT_READABLE; + return GIF_ERROR; + } + + if (READ(GifFile, &Buf, 1) != 1) { + _GifError = D_GIF_ERR_READ_FAILED; + return GIF_ERROR; + } + *ExtCode = Buf; + + return DGifGetExtensionNext(GifFile, Extension); +} + +/****************************************************************************** + * Get a following extension block (see GIF manual) from gif file. This + * routine should be called until NULL Extension is returned. + * The Extension should NOT be freed by the user (not dynamically allocated). + *****************************************************************************/ +int +DGifGetExtensionNext(GifFileType * GifFile, + GifByteType ** Extension) { + + GifByteType Buf; + GifFilePrivateType *Private = (GifFilePrivateType *)GifFile->Private; + + if (READ(GifFile, &Buf, 1) != 1) { + _GifError = D_GIF_ERR_READ_FAILED; + return GIF_ERROR; + } + if (Buf > 0) { + *Extension = Private->Buf; /* Use private unused buffer. */ + (*Extension)[0] = Buf; /* Pascal strings notation (pos. 0 is len.). */ + if (READ(GifFile, &((*Extension)[1]), Buf) != Buf) { + _GifError = D_GIF_ERR_READ_FAILED; + return GIF_ERROR; + } + } else + *Extension = NULL; + + return GIF_OK; +} + +/****************************************************************************** + * This routine should be called last, to close the GIF file. + *****************************************************************************/ +int +DGifCloseFile(GifFileType * GifFile) { + + GifFilePrivateType *Private; + FILE *File; + + if (GifFile == NULL) + return GIF_ERROR; + + Private = (GifFilePrivateType *) GifFile->Private; + + if (!IS_READABLE(Private)) { + /* This file was NOT open for reading: */ + _GifError = D_GIF_ERR_NOT_READABLE; + return GIF_ERROR; + } + + File = Private->File; + + if (GifFile->Image.ColorMap) { + FreeMapObject(GifFile->Image.ColorMap); + GifFile->Image.ColorMap = NULL; + } + + if (GifFile->SColorMap) { + FreeMapObject(GifFile->SColorMap); + GifFile->SColorMap = NULL; + } + + if (Private) { + free((char *)Private); + Private = NULL; + } + + if (GifFile->SavedImages) { + FreeSavedImages(GifFile); + GifFile->SavedImages = NULL; + } + + free(GifFile); + + if (File && (fclose(File) != 0)) { + _GifError = D_GIF_ERR_CLOSE_FAILED; + return GIF_ERROR; + } + return GIF_OK; +} + +/****************************************************************************** + * Get 2 bytes (word) from the given file: + *****************************************************************************/ +static int +DGifGetWord(GifFileType * GifFile, + GifWord *Word) { + + unsigned char c[2]; + + if (READ(GifFile, c, 2) != 2) { + _GifError = D_GIF_ERR_READ_FAILED; + return GIF_ERROR; + } + + *Word = (((unsigned int)c[1]) << 8) + c[0]; + return GIF_OK; +} + +/****************************************************************************** + * Get the image code in compressed form. This routine can be called if the + * information needed to be piped out as is. Obviously this is much faster + * than decoding and encoding again. This routine should be followed by calls + * to DGifGetCodeNext, until NULL block is returned. + * The block should NOT be freed by the user (not dynamically allocated). + *****************************************************************************/ +int +DGifGetCode(GifFileType * GifFile, + int *CodeSize, + GifByteType ** CodeBlock) { + + GifFilePrivateType *Private = (GifFilePrivateType *)GifFile->Private; + + if (!IS_READABLE(Private)) { + /* This file was NOT open for reading: */ + _GifError = D_GIF_ERR_NOT_READABLE; + return GIF_ERROR; + } + + *CodeSize = Private->BitsPerPixel; + + return DGifGetCodeNext(GifFile, CodeBlock); +} + +/****************************************************************************** + * Continue to get the image code in compressed form. This routine should be + * called until NULL block is returned. + * The block should NOT be freed by the user (not dynamically allocated). + *****************************************************************************/ +int +DGifGetCodeNext(GifFileType * GifFile, + GifByteType ** CodeBlock) { + + GifByteType Buf; + GifFilePrivateType *Private = (GifFilePrivateType *)GifFile->Private; + + if (READ(GifFile, &Buf, 1) != 1) { + _GifError = D_GIF_ERR_READ_FAILED; + return GIF_ERROR; + } + + if (Buf > 0) { + *CodeBlock = Private->Buf; /* Use private unused buffer. */ + (*CodeBlock)[0] = Buf; /* Pascal strings notation (pos. 0 is len.). */ + if (READ(GifFile, &((*CodeBlock)[1]), Buf) != Buf) { + _GifError = D_GIF_ERR_READ_FAILED; + return GIF_ERROR; + } + } else { + *CodeBlock = NULL; + Private->Buf[0] = 0; /* Make sure the buffer is empty! */ + Private->PixelCount = 0; /* And local info. indicate image read. */ + } + + return GIF_OK; +} + +/****************************************************************************** + * Setup the LZ decompression for this image: + *****************************************************************************/ +static int +DGifSetupDecompress(GifFileType * GifFile) { + + int i, BitsPerPixel; + GifByteType CodeSize; + GifPrefixType *Prefix; + GifFilePrivateType *Private = (GifFilePrivateType *)GifFile->Private; + + READ(GifFile, &CodeSize, 1); /* Read Code size from file. */ + BitsPerPixel = CodeSize; + + Private->Buf[0] = 0; /* Input Buffer empty. */ + Private->BitsPerPixel = BitsPerPixel; + Private->ClearCode = (1 << BitsPerPixel); + Private->EOFCode = Private->ClearCode + 1; + Private->RunningCode = Private->EOFCode + 1; + Private->RunningBits = BitsPerPixel + 1; /* Number of bits per code. */ + Private->MaxCode1 = 1 << Private->RunningBits; /* Max. code + 1. */ + Private->StackPtr = 0; /* No pixels on the pixel stack. */ + Private->LastCode = NO_SUCH_CODE; + Private->CrntShiftState = 0; /* No information in CrntShiftDWord. */ + Private->CrntShiftDWord = 0; + + Prefix = Private->Prefix; + for (i = 0; i <= LZ_MAX_CODE; i++) + Prefix[i] = NO_SUCH_CODE; + + return GIF_OK; +} + +/****************************************************************************** + * The LZ decompression routine: + * This version decompress the given gif file into Line of length LineLen. + * This routine can be called few times (one per scan line, for example), in + * order the complete the whole image. + *****************************************************************************/ +static int +DGifDecompressLine(GifFileType * GifFile, + GifPixelType * Line, + int LineLen) { + + int i = 0; + int j, CrntCode, EOFCode, ClearCode, CrntPrefix, LastCode, StackPtr; + GifByteType *Stack, *Suffix; + GifPrefixType *Prefix; + GifFilePrivateType *Private = (GifFilePrivateType *) GifFile->Private; + + StackPtr = Private->StackPtr; + Prefix = Private->Prefix; + Suffix = Private->Suffix; + Stack = Private->Stack; + EOFCode = Private->EOFCode; + ClearCode = Private->ClearCode; + LastCode = Private->LastCode; + + if (StackPtr > LZ_MAX_CODE) { + return GIF_ERROR; + } + + if (StackPtr != 0) { + /* Let pop the stack off before continueing to read the gif file: */ + while (StackPtr != 0 && i < LineLen) + Line[i++] = Stack[--StackPtr]; + } + + while (i < LineLen) { /* Decode LineLen items. */ + if (DGifDecompressInput(GifFile, &CrntCode) == GIF_ERROR) + return GIF_ERROR; + + if (CrntCode == EOFCode) { + /* Note however that usually we will not be here as we will stop + * decoding as soon as we got all the pixel, or EOF code will + * not be read at all, and DGifGetLine/Pixel clean everything. */ + if (i != LineLen - 1 || Private->PixelCount != 0) { + _GifError = D_GIF_ERR_EOF_TOO_SOON; + return GIF_ERROR; + } + i++; + } else if (CrntCode == ClearCode) { + /* We need to start over again: */ + for (j = 0; j <= LZ_MAX_CODE; j++) + Prefix[j] = NO_SUCH_CODE; + Private->RunningCode = Private->EOFCode + 1; + Private->RunningBits = Private->BitsPerPixel + 1; + Private->MaxCode1 = 1 << Private->RunningBits; + LastCode = Private->LastCode = NO_SUCH_CODE; + } else { + /* Its regular code - if in pixel range simply add it to output + * stream, otherwise trace to codes linked list until the prefix + * is in pixel range: */ + if (CrntCode < ClearCode) { + /* This is simple - its pixel scalar, so add it to output: */ + Line[i++] = CrntCode; + } else { + /* Its a code to needed to be traced: trace the linked list + * until the prefix is a pixel, while pushing the suffix + * pixels on our stack. If we done, pop the stack in reverse + * (thats what stack is good for!) order to output. */ + if (Prefix[CrntCode] == NO_SUCH_CODE) { + /* Only allowed if CrntCode is exactly the running code: + * In that case CrntCode = XXXCode, CrntCode or the + * prefix code is last code and the suffix char is + * exactly the prefix of last code! */ + if (CrntCode == Private->RunningCode - 2) { + CrntPrefix = LastCode; + Suffix[Private->RunningCode - 2] = + Stack[StackPtr++] = DGifGetPrefixChar(Prefix, + LastCode, + ClearCode); + } else { + _GifError = D_GIF_ERR_IMAGE_DEFECT; + return GIF_ERROR; + } + } else + CrntPrefix = CrntCode; + + /* Now (if image is O.K.) we should not get an NO_SUCH_CODE + * During the trace. As we might loop forever, in case of + * defective image, we count the number of loops we trace + * and stop if we got LZ_MAX_CODE. obviously we can not + * loop more than that. */ + j = 0; + while (j++ <= LZ_MAX_CODE && + CrntPrefix > ClearCode && CrntPrefix <= LZ_MAX_CODE) { + Stack[StackPtr++] = Suffix[CrntPrefix]; + CrntPrefix = Prefix[CrntPrefix]; + } + if (j >= LZ_MAX_CODE || CrntPrefix > LZ_MAX_CODE) { + _GifError = D_GIF_ERR_IMAGE_DEFECT; + return GIF_ERROR; + } + /* Push the last character on stack: */ + Stack[StackPtr++] = CrntPrefix; + + /* Now lets pop all the stack into output: */ + while (StackPtr != 0 && i < LineLen) + Line[i++] = Stack[--StackPtr]; + } + if (LastCode != NO_SUCH_CODE) { + Prefix[Private->RunningCode - 2] = LastCode; + + if (CrntCode == Private->RunningCode - 2) { + /* Only allowed if CrntCode is exactly the running code: + * In that case CrntCode = XXXCode, CrntCode or the + * prefix code is last code and the suffix char is + * exactly the prefix of last code! */ + Suffix[Private->RunningCode - 2] = + DGifGetPrefixChar(Prefix, LastCode, ClearCode); + } else { + Suffix[Private->RunningCode - 2] = + DGifGetPrefixChar(Prefix, CrntCode, ClearCode); + } + } + LastCode = CrntCode; + } + } + + Private->LastCode = LastCode; + Private->StackPtr = StackPtr; + + return GIF_OK; +} + +/****************************************************************************** + * Routine to trace the Prefixes linked list until we get a prefix which is + * not code, but a pixel value (less than ClearCode). Returns that pixel value. + * If image is defective, we might loop here forever, so we limit the loops to + * the maximum possible if image O.k. - LZ_MAX_CODE times. + *****************************************************************************/ +static int +DGifGetPrefixChar(GifPrefixType *Prefix, + int Code, + int ClearCode) { + + int i = 0; + + while (Code > ClearCode && i++ <= LZ_MAX_CODE) { + if (Code > LZ_MAX_CODE) { + return NO_SUCH_CODE; + } + Code = Prefix[Code]; + } + return Code; +} + +/****************************************************************************** + * Interface for accessing the LZ codes directly. Set Code to the real code + * (12bits), or to -1 if EOF code is returned. + *****************************************************************************/ +int +DGifGetLZCodes(GifFileType * GifFile, + int *Code) { + + GifByteType *CodeBlock; + GifFilePrivateType *Private = (GifFilePrivateType *)GifFile->Private; + + if (!IS_READABLE(Private)) { + /* This file was NOT open for reading: */ + _GifError = D_GIF_ERR_NOT_READABLE; + return GIF_ERROR; + } + + if (DGifDecompressInput(GifFile, Code) == GIF_ERROR) + return GIF_ERROR; + + if (*Code == Private->EOFCode) { + /* Skip rest of codes (hopefully only NULL terminating block): */ + do { + if (DGifGetCodeNext(GifFile, &CodeBlock) == GIF_ERROR) + return GIF_ERROR; + } while (CodeBlock != NULL) ; + + *Code = -1; + } else if (*Code == Private->ClearCode) { + /* We need to start over again: */ + Private->RunningCode = Private->EOFCode + 1; + Private->RunningBits = Private->BitsPerPixel + 1; + Private->MaxCode1 = 1 << Private->RunningBits; + } + + return GIF_OK; +} + +/****************************************************************************** + * The LZ decompression input routine: + * This routine is responsable for the decompression of the bit stream from + * 8 bits (bytes) packets, into the real codes. + * Returns GIF_OK if read succesfully. + *****************************************************************************/ +static int +DGifDecompressInput(GifFileType * GifFile, + int *Code) { + + GifFilePrivateType *Private = (GifFilePrivateType *)GifFile->Private; + + GifByteType NextByte; + static unsigned short CodeMasks[] = { + 0x0000, 0x0001, 0x0003, 0x0007, + 0x000f, 0x001f, 0x003f, 0x007f, + 0x00ff, 0x01ff, 0x03ff, 0x07ff, + 0x0fff + }; + /* The image can't contain more than LZ_BITS per code. */ + if (Private->RunningBits > LZ_BITS) { + _GifError = D_GIF_ERR_IMAGE_DEFECT; + return GIF_ERROR; + } + + while (Private->CrntShiftState < Private->RunningBits) { + /* Needs to get more bytes from input stream for next code: */ + if (DGifBufferedInput(GifFile, Private->Buf, &NextByte) == GIF_ERROR) { + return GIF_ERROR; + } + Private->CrntShiftDWord |= + ((unsigned long)NextByte) << Private->CrntShiftState; + Private->CrntShiftState += 8; + } + *Code = Private->CrntShiftDWord & CodeMasks[Private->RunningBits]; + + Private->CrntShiftDWord >>= Private->RunningBits; + Private->CrntShiftState -= Private->RunningBits; + + /* If code cannot fit into RunningBits bits, must raise its size. Note + * however that codes above 4095 are used for special signaling. + * If we're using LZ_BITS bits already and we're at the max code, just + * keep using the table as it is, don't increment Private->RunningCode. + */ + if (Private->RunningCode < LZ_MAX_CODE + 2 && + ++Private->RunningCode > Private->MaxCode1 && + Private->RunningBits < LZ_BITS) { + Private->MaxCode1 <<= 1; + Private->RunningBits++; + } + return GIF_OK; +} + +/****************************************************************************** + * This routines read one gif data block at a time and buffers it internally + * so that the decompression routine could access it. + * The routine returns the next byte from its internal buffer (or read next + * block in if buffer empty) and returns GIF_OK if succesful. + *****************************************************************************/ +static int +DGifBufferedInput(GifFileType * GifFile, + GifByteType * Buf, + GifByteType * NextByte) { + + if (Buf[0] == 0) { + /* Needs to read the next buffer - this one is empty: */ + if (READ(GifFile, Buf, 1) != 1) { + _GifError = D_GIF_ERR_READ_FAILED; + return GIF_ERROR; + } + /* There shouldn't be any empty data blocks here as the LZW spec + * says the LZW termination code should come first. Therefore we + * shouldn't be inside this routine at that point. + */ + if (Buf[0] == 0) { + _GifError = D_GIF_ERR_IMAGE_DEFECT; + return GIF_ERROR; + } + if (READ(GifFile, &Buf[1], Buf[0]) != Buf[0]) { + _GifError = D_GIF_ERR_READ_FAILED; + return GIF_ERROR; + } + *NextByte = Buf[1]; + Buf[1] = 2; /* We use now the second place as last char read! */ + Buf[0]--; + } else { + *NextByte = Buf[Buf[1]++]; + Buf[0]--; + } + + return GIF_OK; +} +#ifndef _GBA_NO_FILEIO + +/****************************************************************************** + * This routine reads an entire GIF into core, hanging all its state info off + * the GifFileType pointer. Call DGifOpenFileName() or DGifOpenFileHandle() + * first to initialize I/O. Its inverse is EGifSpew(). + ******************************************************************************/ +int +DGifSlurp(GifFileType * GifFile) { + + int ImageSize; + GifRecordType RecordType; + SavedImage *sp; + GifByteType *ExtData; + SavedImage temp_save; + + temp_save.ExtensionBlocks = NULL; + temp_save.ExtensionBlockCount = 0; + + do { + if (DGifGetRecordType(GifFile, &RecordType) == GIF_ERROR) + return (GIF_ERROR); + + switch (RecordType) { + case IMAGE_DESC_RECORD_TYPE: + if (DGifGetImageDesc(GifFile) == GIF_ERROR) + return (GIF_ERROR); + + sp = &GifFile->SavedImages[GifFile->ImageCount - 1]; + ImageSize = sp->ImageDesc.Width * sp->ImageDesc.Height; + + sp->RasterBits = (unsigned char *)malloc(ImageSize * + sizeof(GifPixelType)); + if (sp->RasterBits == NULL) { + return GIF_ERROR; + } + if (DGifGetLine(GifFile, sp->RasterBits, ImageSize) == + GIF_ERROR) + return (GIF_ERROR); + if (temp_save.ExtensionBlocks) { + sp->ExtensionBlocks = temp_save.ExtensionBlocks; + sp->ExtensionBlockCount = temp_save.ExtensionBlockCount; + + temp_save.ExtensionBlocks = NULL; + temp_save.ExtensionBlockCount = 0; + + /* FIXME: The following is wrong. It is left in only for + * backwards compatibility. Someday it should go away. Use + * the sp->ExtensionBlocks->Function variable instead. */ + sp->Function = sp->ExtensionBlocks[0].Function; + } + break; + + case EXTENSION_RECORD_TYPE: + if (DGifGetExtension(GifFile, &temp_save.Function, &ExtData) == + GIF_ERROR) + return (GIF_ERROR); + while (ExtData != NULL) { + + /* Create an extension block with our data */ + if (AddExtensionBlock(&temp_save, ExtData[0], &ExtData[1]) + == GIF_ERROR) + return (GIF_ERROR); + + if (DGifGetExtensionNext(GifFile, &ExtData) == GIF_ERROR) + return (GIF_ERROR); + temp_save.Function = 0; + } + break; + + case TERMINATE_RECORD_TYPE: + break; + + default: /* Should be trapped by DGifGetRecordType */ + break; + } + } while (RecordType != TERMINATE_RECORD_TYPE); + + /* Just in case the Gif has an extension block without an associated + * image... (Should we save this into a savefile structure with no image + * instead? Have to check if the present writing code can handle that as + * well.... */ + if (temp_save.ExtensionBlocks) + FreeExtension(&temp_save); + + return (GIF_OK); +} +#endif /* _GBA_NO_FILEIO */ diff --git a/gif_err.c b/gif_err.c new file mode 100644 index 0000000..ea977bd --- /dev/null +++ b/gif_err.c @@ -0,0 +1,120 @@ +/***************************************************************************** + * "Gif-Lib" - Yet another gif library. + * + * Written by: Gershon Elber IBM PC Ver 0.1, Jun. 1989 + ***************************************************************************** + * Handle error reporting for the GIF library. + ***************************************************************************** + * History: + * 17 Jun 89 - Version 1.0 by Gershon Elber. + ****************************************************************************/ + +#ifdef HAVE_CONFIG_H +#include +#endif + +#include +#include "gif_lib.h" + +int _GifError = 0; + +/***************************************************************************** + * Return the last GIF error (0 if none) and reset the error. + ****************************************************************************/ +int +GifLastError(void) { + int i = _GifError; + + _GifError = 0; + + return i; +} +#ifndef _GBA_NO_FILEIO + +/***************************************************************************** + * Print the last GIF error to stderr. + ****************************************************************************/ +void +PrintGifError(void) { + char *Err; + + switch (_GifError) { + case E_GIF_ERR_OPEN_FAILED: + Err = "Failed to open given file"; + break; + case E_GIF_ERR_WRITE_FAILED: + Err = "Failed to Write to given file"; + break; + case E_GIF_ERR_HAS_SCRN_DSCR: + Err = "Screen Descriptor already been set"; + break; + case E_GIF_ERR_HAS_IMAG_DSCR: + Err = "Image Descriptor is still active"; + break; + case E_GIF_ERR_NO_COLOR_MAP: + Err = "Neither Global Nor Local color map"; + break; + case E_GIF_ERR_DATA_TOO_BIG: + Err = "#Pixels bigger than Width * Height"; + break; + case E_GIF_ERR_NOT_ENOUGH_MEM: + Err = "Fail to allocate required memory"; + break; + case E_GIF_ERR_DISK_IS_FULL: + Err = "Write failed (disk full?)"; + break; + case E_GIF_ERR_CLOSE_FAILED: + Err = "Failed to close given file"; + break; + case E_GIF_ERR_NOT_WRITEABLE: + Err = "Given file was not opened for write"; + break; + case D_GIF_ERR_OPEN_FAILED: + Err = "Failed to open given file"; + break; + case D_GIF_ERR_READ_FAILED: + Err = "Failed to Read from given file"; + break; + case D_GIF_ERR_NOT_GIF_FILE: + Err = "Given file is NOT GIF file"; + break; + case D_GIF_ERR_NO_SCRN_DSCR: + Err = "No Screen Descriptor detected"; + break; + case D_GIF_ERR_NO_IMAG_DSCR: + Err = "No Image Descriptor detected"; + break; + case D_GIF_ERR_NO_COLOR_MAP: + Err = "Neither Global Nor Local color map"; + break; + case D_GIF_ERR_WRONG_RECORD: + Err = "Wrong record type detected"; + break; + case D_GIF_ERR_DATA_TOO_BIG: + Err = "#Pixels bigger than Width * Height"; + break; + case D_GIF_ERR_NOT_ENOUGH_MEM: + Err = "Fail to allocate required memory"; + break; + case D_GIF_ERR_CLOSE_FAILED: + Err = "Failed to close given file"; + break; + case D_GIF_ERR_NOT_READABLE: + Err = "Given file was not opened for read"; + break; + case D_GIF_ERR_IMAGE_DEFECT: + Err = "Image is defective, decoding aborted"; + break; + case D_GIF_ERR_EOF_TOO_SOON: + Err = "Image EOF detected, before image complete"; + break; + default: + Err = NULL; + break; + } + if (Err != NULL) + fprintf(stderr, "\nGIF-LIB error: %s.\n", Err); + else + fprintf(stderr, "\nGIF-LIB undefined error %d.\n", _GifError); +} +#endif /* _GBA_NO_FILEIO */ diff --git a/gif_hash.h b/gif_hash.h new file mode 100644 index 0000000..3e23ff3 --- /dev/null +++ b/gif_hash.h @@ -0,0 +1,59 @@ +/****************************************************************************** +* Declarations, global to other of the GIF-HASH.C module. * +* * +* Written by Gershon Elber, Jun 1989 * +******************************************************************************* +* History: * +* 14 Jun 89 - Version 1.0 by Gershon Elber. * +******************************************************************************/ + +#ifndef _GIF_HASH_H_ +#define _GIF_HASH_H_ + +#ifdef HAVE_CONFIG_H +#include +#endif + +/* Find a thirty-two bit int type */ +#ifdef HAVE_STDINT_H +#include +#endif +#ifdef HAVE_INTTYPES_H +#include +#endif +#ifdef HAVE_SYS_TYPES_H +#include +#endif +#ifdef HAVE_UNISTD_H +#include +#endif + +#ifdef HAVE_BASETSD_H +#include +#endif + +#define HT_SIZE 8192 /* 12bits = 4096 or twice as big! */ +#define HT_KEY_MASK 0x1FFF /* 13bits keys */ +#define HT_KEY_NUM_BITS 13 /* 13bits keys */ +#define HT_MAX_KEY 8191 /* 13bits - 1, maximal code possible */ +#define HT_MAX_CODE 4095 /* Biggest code possible in 12 bits. */ + +/* The 32 bits of the long are divided into two parts for the key & code: */ +/* 1. The code is 12 bits as our compression algorithm is limited to 12bits */ +/* 2. The key is 12 bits Prefix code + 8 bit new char or 20 bits. */ +/* The key is the upper 20 bits. The code is the lower 12. */ +#define HT_GET_KEY(l) (l >> 12) +#define HT_GET_CODE(l) (l & 0x0FFF) +#define HT_PUT_KEY(l) (l << 12) +#define HT_PUT_CODE(l) (l & 0x0FFF) + +typedef struct GifHashTableType { + UINT32 HTable[HT_SIZE]; +} GifHashTableType; + +GifHashTableType *_InitHashTable(void); +void _ClearHashTable(GifHashTableType *HashTable); +void _InsertHashTable(GifHashTableType *HashTable, UINT32 Key, int Code); +int _ExistsHashTable(GifHashTableType *HashTable, UINT32 Key); + +#endif /* _GIF_HASH_H_ */ diff --git a/gif_lib.h b/gif_lib.h new file mode 100644 index 0000000..f0cf858 --- /dev/null +++ b/gif_lib.h @@ -0,0 +1,336 @@ +/****************************************************************************** + * In order to make life a little bit easier when using the GIF file format, + * this library was written, and which does all the dirty work... + * + * Written by Gershon Elber, Jun. 1989 + * Hacks by Eric S. Raymond, Sep. 1992 + ****************************************************************************** + * History: + * 14 Jun 89 - Version 1.0 by Gershon Elber. + * 3 Sep 90 - Version 1.1 by Gershon Elber (Support for Gif89, Unique names) + * 15 Sep 90 - Version 2.0 by Eric S. Raymond (Changes to suoport GIF slurp) + * 26 Jun 96 - Version 3.0 by Eric S. Raymond (Full GIF89 support) + * 17 Dec 98 - Version 4.0 by Toshio Kuratomi (Fix extension writing code) + *****************************************************************************/ + +#ifndef _GIF_LIB_H_ +#define _GIF_LIB_H_ 1 + +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +#define GIF_LIB_VERSION " Version 4.1, " + +#define GIF_ERROR 0 +#define GIF_OK 1 + +#ifndef TRUE +#define TRUE 1 +#endif /* TRUE */ +#ifndef FALSE +#define FALSE 0 +#endif /* FALSE */ + +#ifndef NULL +#define NULL 0 +#endif /* NULL */ + +#define GIF_STAMP "GIFVER" /* First chars in file - GIF stamp. */ +#define GIF_STAMP_LEN sizeof(GIF_STAMP) - 1 +#define GIF_VERSION_POS 3 /* Version first character in stamp. */ +#define GIF87_STAMP "GIF87a" /* First chars in file - GIF stamp. */ +#define GIF89_STAMP "GIF89a" /* First chars in file - GIF stamp. */ + +#define GIF_FILE_BUFFER_SIZE 16384 /* Files uses bigger buffers than usual. */ + +typedef int GifBooleanType; +typedef unsigned char GifPixelType; +typedef unsigned char *GifRowType; +typedef unsigned char GifByteType; +#ifdef _GBA_OPTMEM + typedef unsigned short GifPrefixType; + typedef short GifWord; +#else + typedef unsigned int GifPrefixType; + typedef int GifWord; +#endif + +#define GIF_MESSAGE(Msg) fprintf(stderr, "\n%s: %s\n", PROGRAM_NAME, Msg) +#define GIF_EXIT(Msg) { GIF_MESSAGE(Msg); exit(-3); } + +#ifdef SYSV +#define VoidPtr char * +#else +#define VoidPtr void * +#endif /* SYSV */ + +typedef struct GifColorType { + GifByteType Red, Green, Blue; +} GifColorType; + +typedef struct ColorMapObject { + int ColorCount; + int BitsPerPixel; + GifColorType *Colors; /* on malloc(3) heap */ +} ColorMapObject; + +typedef struct GifImageDesc { + GifWord Left, Top, Width, Height, /* Current image dimensions. */ + Interlace; /* Sequential/Interlaced lines. */ + ColorMapObject *ColorMap; /* The local color map */ +} GifImageDesc; + +typedef struct GifFileType { + GifWord SWidth, SHeight, /* Screen dimensions. */ + SColorResolution, /* How many colors can we generate? */ + SBackGroundColor; /* I hope you understand this one... */ + ColorMapObject *SColorMap; /* NULL if not exists. */ + int ImageCount; /* Number of current image */ + GifImageDesc Image; /* Block describing current image */ + struct SavedImage *SavedImages; /* Use this to accumulate file state */ + VoidPtr UserData; /* hook to attach user data (TVT) */ + VoidPtr Private; /* Don't mess with this! */ +} GifFileType; + +typedef enum { + UNDEFINED_RECORD_TYPE, + SCREEN_DESC_RECORD_TYPE, + IMAGE_DESC_RECORD_TYPE, /* Begin with ',' */ + EXTENSION_RECORD_TYPE, /* Begin with '!' */ + TERMINATE_RECORD_TYPE /* Begin with ';' */ +} GifRecordType; + +/* DumpScreen2Gif routine constants identify type of window/screen to dump. + * Note all values below 1000 are reserved for the IBMPC different display + * devices (it has many!) and are compatible with the numbering TC2.0 + * (Turbo C 2.0 compiler for IBM PC) gives to these devices. + */ +typedef enum { + GIF_DUMP_SGI_WINDOW = 1000, + GIF_DUMP_X_WINDOW = 1001 +} GifScreenDumpType; + +/* func type to read gif data from arbitrary sources (TVT) */ +typedef int (*InputFunc) (GifFileType *, GifByteType *, int); + +/* func type to write gif data ro arbitrary targets. + * Returns count of bytes written. (MRB) + */ +typedef int (*OutputFunc) (GifFileType *, const GifByteType *, int); + +/****************************************************************************** + * GIF89 extension function codes +******************************************************************************/ + +#define COMMENT_EXT_FUNC_CODE 0xfe /* comment */ +#define GRAPHICS_EXT_FUNC_CODE 0xf9 /* graphics control */ +#define PLAINTEXT_EXT_FUNC_CODE 0x01 /* plaintext */ +#define APPLICATION_EXT_FUNC_CODE 0xff /* application block */ + +/****************************************************************************** + * O.K., here are the routines one can access in order to encode GIF file: + * (GIF_LIB file EGIF_LIB.C). +******************************************************************************/ + +GifFileType *EGifOpenFileName(const char *GifFileName, + int GifTestExistance); +GifFileType *EGifOpenFileHandle(int GifFileHandle); +GifFileType *EGifOpen(void *userPtr, OutputFunc writeFunc); + +int EGifSpew(GifFileType * GifFile); +void EGifSetGifVersion(const char *Version); +int EGifPutScreenDesc(GifFileType * GifFile, + int GifWidth, int GifHeight, int GifColorRes, + int GifBackGround, + const ColorMapObject * GifColorMap); +int EGifPutImageDesc(GifFileType * GifFile, int GifLeft, int GifTop, + int Width, int GifHeight, int GifInterlace, + const ColorMapObject * GifColorMap); +int EGifPutLine(GifFileType * GifFile, GifPixelType * GifLine, + int GifLineLen); +int EGifPutPixel(GifFileType * GifFile, GifPixelType GifPixel); +int EGifPutComment(GifFileType * GifFile, const char *GifComment); +int EGifPutExtensionFirst(GifFileType * GifFile, int GifExtCode, + int GifExtLen, const VoidPtr GifExtension); +int EGifPutExtensionNext(GifFileType * GifFile, int GifExtCode, + int GifExtLen, const VoidPtr GifExtension); +int EGifPutExtensionLast(GifFileType * GifFile, int GifExtCode, + int GifExtLen, const VoidPtr GifExtension); +int EGifPutExtension(GifFileType * GifFile, int GifExtCode, int GifExtLen, + const VoidPtr GifExtension); +int EGifPutCode(GifFileType * GifFile, int GifCodeSize, + const GifByteType * GifCodeBlock); +int EGifPutCodeNext(GifFileType * GifFile, + const GifByteType * GifCodeBlock); +int EGifCloseFile(GifFileType * GifFile); + +#define E_GIF_ERR_OPEN_FAILED 1 /* And EGif possible errors. */ +#define E_GIF_ERR_WRITE_FAILED 2 +#define E_GIF_ERR_HAS_SCRN_DSCR 3 +#define E_GIF_ERR_HAS_IMAG_DSCR 4 +#define E_GIF_ERR_NO_COLOR_MAP 5 +#define E_GIF_ERR_DATA_TOO_BIG 6 +#define E_GIF_ERR_NOT_ENOUGH_MEM 7 +#define E_GIF_ERR_DISK_IS_FULL 8 +#define E_GIF_ERR_CLOSE_FAILED 9 +#define E_GIF_ERR_NOT_WRITEABLE 10 + +/****************************************************************************** + * O.K., here are the routines one can access in order to decode GIF file: + * (GIF_LIB file DGIF_LIB.C). + *****************************************************************************/ +#ifndef _GBA_NO_FILEIO +GifFileType *DGifOpenFileName(const char *GifFileName); +GifFileType *DGifOpenFileHandle(int GifFileHandle); +int DGifSlurp(GifFileType * GifFile); +#endif /* _GBA_NO_FILEIO */ +GifFileType *DGifOpen(void *userPtr, InputFunc readFunc); /* new one + * (TVT) */ +int DGifGetScreenDesc(GifFileType * GifFile); +int DGifGetRecordType(GifFileType * GifFile, GifRecordType * GifType); +int DGifGetImageDesc(GifFileType * GifFile); +int DGifGetLine(GifFileType * GifFile, GifPixelType * GifLine, int GifLineLen); +int DGifGetPixel(GifFileType * GifFile, GifPixelType GifPixel); +int DGifGetComment(GifFileType * GifFile, char *GifComment); +int DGifGetExtension(GifFileType * GifFile, int *GifExtCode, + GifByteType ** GifExtension); +int DGifGetExtensionNext(GifFileType * GifFile, GifByteType ** GifExtension); +int DGifGetCode(GifFileType * GifFile, int *GifCodeSize, + GifByteType ** GifCodeBlock); +int DGifGetCodeNext(GifFileType * GifFile, GifByteType ** GifCodeBlock); +int DGifGetLZCodes(GifFileType * GifFile, int *GifCode); +int DGifCloseFile(GifFileType * GifFile); + +#define D_GIF_ERR_OPEN_FAILED 101 /* And DGif possible errors. */ +#define D_GIF_ERR_READ_FAILED 102 +#define D_GIF_ERR_NOT_GIF_FILE 103 +#define D_GIF_ERR_NO_SCRN_DSCR 104 +#define D_GIF_ERR_NO_IMAG_DSCR 105 +#define D_GIF_ERR_NO_COLOR_MAP 106 +#define D_GIF_ERR_WRONG_RECORD 107 +#define D_GIF_ERR_DATA_TOO_BIG 108 +#define D_GIF_ERR_NOT_ENOUGH_MEM 109 +#define D_GIF_ERR_CLOSE_FAILED 110 +#define D_GIF_ERR_NOT_READABLE 111 +#define D_GIF_ERR_IMAGE_DEFECT 112 +#define D_GIF_ERR_EOF_TOO_SOON 113 + +/****************************************************************************** + * O.K., here are the routines from GIF_LIB file QUANTIZE.C. +******************************************************************************/ +int QuantizeBuffer(unsigned int Width, unsigned int Height, + int *ColorMapSize, GifByteType * RedInput, + GifByteType * GreenInput, GifByteType * BlueInput, + GifByteType * OutputBuffer, + GifColorType * OutputColorMap); + +/****************************************************************************** + * O.K., here are the routines from GIF_LIB file QPRINTF.C. +******************************************************************************/ +extern int GifQuietPrint; + +#ifdef HAVE_STDARG_H + extern void GifQprintf(char *Format, ...); +#elif defined (HAVE_VARARGS_H) + extern void GifQprintf(); +#endif /* HAVE_STDARG_H */ + +/****************************************************************************** + * O.K., here are the routines from GIF_LIB file GIF_ERR.C. +******************************************************************************/ +#ifndef _GBA_NO_FILEIO +extern void PrintGifError(void); +#endif /* _GBA_NO_FILEIO */ +extern int GifLastError(void); + +/****************************************************************************** + * O.K., here are the routines from GIF_LIB file DEV2GIF.C. +******************************************************************************/ +extern int DumpScreen2Gif(const char *FileName, + int ReqGraphDriver, + long ReqGraphMode1, + long ReqGraphMode2, + long ReqGraphMode3); + +/***************************************************************************** + * + * Everything below this point is new after version 1.2, supporting `slurp + * mode' for doing I/O in two big belts with all the image-bashing in core. + * + *****************************************************************************/ + +/****************************************************************************** + * Color Map handling from ALLOCGIF.C + *****************************************************************************/ + +extern ColorMapObject *MakeMapObject(int ColorCount, + const GifColorType * ColorMap); +extern void FreeMapObject(ColorMapObject * Object); +extern ColorMapObject *UnionColorMap(const ColorMapObject * ColorIn1, + const ColorMapObject * ColorIn2, + GifPixelType ColorTransIn2[]); +extern int BitSize(int n); + +/****************************************************************************** + * Support for the in-core structures allocation (slurp mode). + *****************************************************************************/ + +/* This is the in-core version of an extension record */ +typedef struct { + int ByteCount; + char *Bytes; /* on malloc(3) heap */ + int Function; /* Holds the type of the Extension block. */ +} ExtensionBlock; + +/* This holds an image header, its unpacked raster bits, and extensions */ +typedef struct SavedImage { + GifImageDesc ImageDesc; + unsigned char *RasterBits; /* on malloc(3) heap */ + int Function; /* DEPRECATED: Use ExtensionBlocks[x].Function instead */ + int ExtensionBlockCount; + ExtensionBlock *ExtensionBlocks; /* on malloc(3) heap */ +} SavedImage; + +extern void ApplyTranslation(SavedImage * Image, GifPixelType Translation[]); +extern void MakeExtension(SavedImage * New, int Function); +extern int AddExtensionBlock(SavedImage * New, int Len, + unsigned char ExtData[]); +extern void FreeExtension(SavedImage * Image); +extern SavedImage *MakeSavedImage(GifFileType * GifFile, + const SavedImage * CopyFrom); +extern void FreeSavedImages(GifFileType * GifFile); + +/****************************************************************************** + * The library's internal utility font + *****************************************************************************/ + +#define GIF_FONT_WIDTH 8 +#define GIF_FONT_HEIGHT 8 +extern unsigned char AsciiTable[][GIF_FONT_WIDTH]; + +#ifdef _WIN32 + extern void DrawGifText(SavedImage * Image, +#else + extern void DrawGifText(SavedImage * Image, +#endif + const int x, const int y, + const char *legend, const int color); + +extern void DrawBox(SavedImage * Image, + const int x, const int y, + const int w, const int d, const int color); + +void DrawRectangle(SavedImage * Image, + const int x, const int y, + const int w, const int d, const int color); + +extern void DrawBoxedText(SavedImage * Image, + const int x, const int y, + const char *legend, + const int border, const int bg, const int fg); + +#ifdef __cplusplus +} +#endif /* __cplusplus */ +#endif /* _GIF_LIB_H */ diff --git a/gif_lib_private.h b/gif_lib_private.h new file mode 100644 index 0000000..b31c9c5 --- /dev/null +++ b/gif_lib_private.h @@ -0,0 +1,59 @@ +#ifndef _GIF_LIB_PRIVATE_H +#define _GIF_LIB_PRIVATE_H + +#include "gif_lib.h" +#include "gif_hash.h" + +#define PROGRAM_NAME "GIFLIB" + +#ifdef SYSV +#define VersionStr "Gif library module,\t\tEric S. Raymond\n\ + (C) Copyright 1997 Eric S. Raymond\n" +#else +#define VersionStr PROGRAM_NAME " IBMPC " GIF_LIB_VERSION \ + " Eric S. Raymond, " __DATE__ ", " \ + __TIME__ "\n" "(C) Copyright 1997 Eric S. Raymond\n" +#endif /* SYSV */ + +#define LZ_MAX_CODE 4095 /* Biggest code possible in 12 bits. */ +#define LZ_BITS 12 + +#define FLUSH_OUTPUT 4096 /* Impossible code, to signal flush. */ +#define FIRST_CODE 4097 /* Impossible code, to signal first. */ +#define NO_SUCH_CODE 4098 /* Impossible code, to signal empty. */ + +#define FILE_STATE_WRITE 0x01 +#define FILE_STATE_SCREEN 0x02 +#define FILE_STATE_IMAGE 0x04 +#define FILE_STATE_READ 0x08 + +#define IS_READABLE(Private) (Private->FileState & FILE_STATE_READ) +#define IS_WRITEABLE(Private) (Private->FileState & FILE_STATE_WRITE) + +typedef struct GifFilePrivateType { + GifWord FileState, FileHandle, /* Where all this data goes to! */ + BitsPerPixel, /* Bits per pixel (Codes uses at least this + 1). */ + ClearCode, /* The CLEAR LZ code. */ + EOFCode, /* The EOF LZ code. */ + RunningCode, /* The next code algorithm can generate. */ + RunningBits, /* The number of bits required to represent RunningCode. */ + MaxCode1, /* 1 bigger than max. possible code, in RunningBits bits. */ + LastCode, /* The code before the current code. */ + CrntCode, /* Current algorithm code. */ + StackPtr, /* For character stack (see below). */ + CrntShiftState; /* Number of bits in CrntShiftDWord. */ + unsigned long CrntShiftDWord; /* For bytes decomposition into codes. */ + unsigned long PixelCount; /* Number of pixels in image. */ + FILE *File; /* File as stream. */ + InputFunc Read; /* function to read gif input (TVT) */ + OutputFunc Write; /* function to write gif output (MRB) */ + GifByteType Buf[256]; /* Compressed input is buffered here. */ + GifByteType Stack[LZ_MAX_CODE]; /* Decoded pixels are stacked here. */ + GifByteType Suffix[LZ_MAX_CODE + 1]; /* So we can trace the codes. */ + GifPrefixType Prefix[LZ_MAX_CODE + 1]; + GifHashTableType *HashTable; +} GifFilePrivateType; + +extern int _GifError; + +#endif /* _GIF_LIB_PRIVATE_H */ diff --git a/gifalloc.c b/gifalloc.c new file mode 100644 index 0000000..79d2332 --- /dev/null +++ b/gifalloc.c @@ -0,0 +1,443 @@ +/***************************************************************************** + * "Gif-Lib" - Yet another gif library. + * + * Written by: Gershon Elber Ver 0.1, Jun. 1989 + * Extensively hacked by: Eric S. Raymond Ver 1.?, Sep 1992 + ***************************************************************************** + * GIF construction tools + ***************************************************************************** + * History: + * 15 Sep 92 - Version 1.0 by Eric Raymond. + ****************************************************************************/ + +#ifdef HAVE_CONFIG_H +#include +#endif + +#include +#include +#include +#include "gif_lib.h" + +#define MAX(x, y) (((x) > (y)) ? (x) : (y)) + +/****************************************************************************** + * Miscellaneous utility functions + *****************************************************************************/ + +/* return smallest bitfield size n will fit in */ +int +BitSize(int n) { + + register int i; + + for (i = 1; i <= 8; i++) + if ((1 << i) >= n) + break; + return (i); +} + +/****************************************************************************** + * Color map object functions + *****************************************************************************/ + +/* + * Allocate a color map of given size; initialize with contents of + * ColorMap if that pointer is non-NULL. + */ +ColorMapObject * +MakeMapObject(int ColorCount, + const GifColorType * ColorMap) { + + ColorMapObject *Object; + + /*** FIXME: Our ColorCount has to be a power of two. Is it necessary to + * make the user know that or should we automatically round up instead? */ + if (ColorCount != (1 << BitSize(ColorCount))) { + return ((ColorMapObject *) NULL); + } + + Object = (ColorMapObject *)malloc(sizeof(ColorMapObject)); + if (Object == (ColorMapObject *) NULL) { + return ((ColorMapObject *) NULL); + } + + Object->Colors = (GifColorType *)calloc(ColorCount, sizeof(GifColorType)); + if (Object->Colors == (GifColorType *) NULL) { + return ((ColorMapObject *) NULL); + } + + Object->ColorCount = ColorCount; + Object->BitsPerPixel = BitSize(ColorCount); + + if (ColorMap) { + memcpy((char *)Object->Colors, + (char *)ColorMap, ColorCount * sizeof(GifColorType)); + } + + return (Object); +} + +/* + * Free a color map object + */ +void +FreeMapObject(ColorMapObject * Object) { + + if (Object != NULL) { + free(Object->Colors); + free(Object); + /*** FIXME: + * When we are willing to break API we need to make this function + * FreeMapObject(ColorMapObject **Object) + * and do this assignment to NULL here: + * *Object = NULL; + */ + } +} + +#ifdef DEBUG +void +DumpColorMap(ColorMapObject * Object, + FILE * fp) { + + if (Object) { + int i, j, Len = Object->ColorCount; + + for (i = 0; i < Len; i += 4) { + for (j = 0; j < 4 && j < Len; j++) { + fprintf(fp, "%3d: %02x %02x %02x ", i + j, + Object->Colors[i + j].Red, + Object->Colors[i + j].Green, + Object->Colors[i + j].Blue); + } + fprintf(fp, "\n"); + } + } +} +#endif /* DEBUG */ + +/* + * Compute the union of two given color maps and return it. If result can't + * fit into 256 colors, NULL is returned, the allocated union otherwise. + * ColorIn1 is copied as is to ColorUnion, while colors from ColorIn2 are + * copied iff they didn't exist before. ColorTransIn2 maps the old + * ColorIn2 into ColorUnion color map table. + */ +ColorMapObject * +UnionColorMap(const ColorMapObject * ColorIn1, + const ColorMapObject * ColorIn2, + GifPixelType ColorTransIn2[]) { + + int i, j, CrntSlot, RoundUpTo, NewBitSize; + ColorMapObject *ColorUnion; + + /* + * Allocate table which will hold the result for sure. + */ + ColorUnion = MakeMapObject(MAX(ColorIn1->ColorCount, + ColorIn2->ColorCount) * 2, NULL); + + if (ColorUnion == NULL) + return (NULL); + + /* Copy ColorIn1 to ColorUnionSize; */ + /*** FIXME: What if there are duplicate entries into the colormap to begin + * with? */ + for (i = 0; i < ColorIn1->ColorCount; i++) + ColorUnion->Colors[i] = ColorIn1->Colors[i]; + CrntSlot = ColorIn1->ColorCount; + + /* + * Potentially obnoxious hack: + * + * Back CrntSlot down past all contiguous {0, 0, 0} slots at the end + * of table 1. This is very useful if your display is limited to + * 16 colors. + */ + while (ColorIn1->Colors[CrntSlot - 1].Red == 0 + && ColorIn1->Colors[CrntSlot - 1].Green == 0 + && ColorIn1->Colors[CrntSlot - 1].Blue == 0) + CrntSlot--; + + /* Copy ColorIn2 to ColorUnionSize (use old colors if they exist): */ + for (i = 0; i < ColorIn2->ColorCount && CrntSlot <= 256; i++) { + /* Let's see if this color already exists: */ + /*** FIXME: Will it ever occur that ColorIn2 will contain duplicate + * entries? So we should search from 0 to CrntSlot rather than + * ColorIn1->ColorCount? + */ + for (j = 0; j < ColorIn1->ColorCount; j++) + if (memcmp (&ColorIn1->Colors[j], &ColorIn2->Colors[i], + sizeof(GifColorType)) == 0) + break; + + if (j < ColorIn1->ColorCount) + ColorTransIn2[i] = j; /* color exists in Color1 */ + else { + /* Color is new - copy it to a new slot: */ + ColorUnion->Colors[CrntSlot] = ColorIn2->Colors[i]; + ColorTransIn2[i] = CrntSlot++; + } + } + + if (CrntSlot > 256) { + FreeMapObject(ColorUnion); + return ((ColorMapObject *) NULL); + } + + NewBitSize = BitSize(CrntSlot); + RoundUpTo = (1 << NewBitSize); + + if (RoundUpTo != ColorUnion->ColorCount) { + register GifColorType *Map = ColorUnion->Colors; + + /* + * Zero out slots up to next power of 2. + * We know these slots exist because of the way ColorUnion's + * start dimension was computed. + */ + for (j = CrntSlot; j < RoundUpTo; j++) + Map[j].Red = Map[j].Green = Map[j].Blue = 0; + + /* perhaps we can shrink the map? */ + if (RoundUpTo < ColorUnion->ColorCount) + ColorUnion->Colors = (GifColorType *)realloc(Map, + sizeof(GifColorType) * RoundUpTo); + } + + ColorUnion->ColorCount = RoundUpTo; + ColorUnion->BitsPerPixel = NewBitSize; + + return (ColorUnion); +} + +/* + * Apply a given color translation to the raster bits of an image + */ +void +ApplyTranslation(SavedImage * Image, + GifPixelType Translation[]) { + + register int i; + register int RasterSize = Image->ImageDesc.Height * Image->ImageDesc.Width; + + for (i = 0; i < RasterSize; i++) + Image->RasterBits[i] = Translation[Image->RasterBits[i]]; +} + +/****************************************************************************** + * Extension record functions + *****************************************************************************/ + +void +MakeExtension(SavedImage * New, + int Function) { + + New->Function = Function; + /*** FIXME: + * Someday we might have to deal with multiple extensions. + * ??? Was this a note from Gershon or from me? Does the multiple + * extension blocks solve this or do we need multiple Functions? Or is + * this an obsolete function? (People should use AddExtensionBlock + * instead?) + * Looks like AddExtensionBlock needs to take the int Function argument + * then it can take the place of this function. Right now people have to + * use both. Fix AddExtensionBlock and add this to the deprecation list. + */ +} + +int +AddExtensionBlock(SavedImage * New, + int Len, + unsigned char ExtData[]) { + + ExtensionBlock *ep; + + if (New->ExtensionBlocks == NULL) + New->ExtensionBlocks=(ExtensionBlock *)malloc(sizeof(ExtensionBlock)); + else + New->ExtensionBlocks = (ExtensionBlock *)realloc(New->ExtensionBlocks, + sizeof(ExtensionBlock) * + (New->ExtensionBlockCount + 1)); + + if (New->ExtensionBlocks == NULL) + return (GIF_ERROR); + + ep = &New->ExtensionBlocks[New->ExtensionBlockCount++]; + + ep->ByteCount=Len; + ep->Bytes = (char *)malloc(ep->ByteCount); + if (ep->Bytes == NULL) + return (GIF_ERROR); + + if (ExtData) { + memcpy(ep->Bytes, ExtData, Len); + ep->Function = New->Function; + } + + return (GIF_OK); +} + +void +FreeExtension(SavedImage * Image) +{ + ExtensionBlock *ep; + + if ((Image == NULL) || (Image->ExtensionBlocks == NULL)) { + return; + } + for (ep = Image->ExtensionBlocks; + ep < (Image->ExtensionBlocks + Image->ExtensionBlockCount); ep++) + (void)free((char *)ep->Bytes); + free((char *)Image->ExtensionBlocks); + Image->ExtensionBlocks = NULL; +} + +/****************************************************************************** + * Image block allocation functions +******************************************************************************/ + +/* Private Function: + * Frees the last image in the GifFile->SavedImages array + */ +void +FreeLastSavedImage(GifFileType *GifFile) { + + SavedImage *sp; + + if ((GifFile == NULL) || (GifFile->SavedImages == NULL)) + return; + + /* Remove one SavedImage from the GifFile */ + GifFile->ImageCount--; + sp = &GifFile->SavedImages[GifFile->ImageCount]; + + /* Deallocate its Colormap */ + if (sp->ImageDesc.ColorMap) { + FreeMapObject(sp->ImageDesc.ColorMap); + sp->ImageDesc.ColorMap = NULL; + } + + /* Deallocate the image data */ + if (sp->RasterBits) + free((char *)sp->RasterBits); + + /* Deallocate any extensions */ + if (sp->ExtensionBlocks) + FreeExtension(sp); + + /*** FIXME: We could realloc the GifFile->SavedImages structure but is + * there a point to it? Saves some memory but we'd have to do it every + * time. If this is used in FreeSavedImages then it would be inefficient + * (The whole array is going to be deallocated.) If we just use it when + * we want to free the last Image it's convenient to do it here. + */ +} + +/* + * Append an image block to the SavedImages array + */ +SavedImage * +MakeSavedImage(GifFileType * GifFile, + const SavedImage * CopyFrom) { + + SavedImage *sp; + + if (GifFile->SavedImages == NULL) + GifFile->SavedImages = (SavedImage *)malloc(sizeof(SavedImage)); + else + GifFile->SavedImages = (SavedImage *)realloc(GifFile->SavedImages, + sizeof(SavedImage) * (GifFile->ImageCount + 1)); + + if (GifFile->SavedImages == NULL) + return ((SavedImage *)NULL); + else { + sp = &GifFile->SavedImages[GifFile->ImageCount++]; + memset((char *)sp, '\0', sizeof(SavedImage)); + + if (CopyFrom) { + memcpy((char *)sp, CopyFrom, sizeof(SavedImage)); + + /* + * Make our own allocated copies of the heap fields in the + * copied record. This guards against potential aliasing + * problems. + */ + + /* first, the local color map */ + if (sp->ImageDesc.ColorMap) { + sp->ImageDesc.ColorMap = MakeMapObject( + CopyFrom->ImageDesc.ColorMap->ColorCount, + CopyFrom->ImageDesc.ColorMap->Colors); + if (sp->ImageDesc.ColorMap == NULL) { + FreeLastSavedImage(GifFile); + return (SavedImage *)(NULL); + } + } + + /* next, the raster */ + sp->RasterBits = (unsigned char *)malloc(sizeof(GifPixelType) * + CopyFrom->ImageDesc.Height * + CopyFrom->ImageDesc.Width); + if (sp->RasterBits == NULL) { + FreeLastSavedImage(GifFile); + return (SavedImage *)(NULL); + } + memcpy(sp->RasterBits, CopyFrom->RasterBits, + sizeof(GifPixelType) * CopyFrom->ImageDesc.Height * + CopyFrom->ImageDesc.Width); + + /* finally, the extension blocks */ + if (sp->ExtensionBlocks) { + sp->ExtensionBlocks = (ExtensionBlock *)malloc( + sizeof(ExtensionBlock) * + CopyFrom->ExtensionBlockCount); + if (sp->ExtensionBlocks == NULL) { + FreeLastSavedImage(GifFile); + return (SavedImage *)(NULL); + } + memcpy(sp->ExtensionBlocks, CopyFrom->ExtensionBlocks, + sizeof(ExtensionBlock) * CopyFrom->ExtensionBlockCount); + + /* + * For the moment, the actual blocks can take their + * chances with free(). We'll fix this later. + *** FIXME: [Better check this out... Toshio] + * 2004 May 27: Looks like this was an ESR note. + * It means the blocks are shallow copied from InFile to + * OutFile. However, I don't see that in this code.... + * Did ESR fix it but never remove this note (And other notes + * in gifspnge?) + */ + } + } + + return (sp); + } +} + +void +FreeSavedImages(GifFileType * GifFile) { + + SavedImage *sp; + + if ((GifFile == NULL) || (GifFile->SavedImages == NULL)) { + return; + } + for (sp = GifFile->SavedImages; + sp < GifFile->SavedImages + GifFile->ImageCount; sp++) { + if (sp->ImageDesc.ColorMap) { + FreeMapObject(sp->ImageDesc.ColorMap); + sp->ImageDesc.ColorMap = NULL; + } + + if (sp->RasterBits) + free((char *)sp->RasterBits); + + if (sp->ExtensionBlocks) + FreeExtension(sp); + } + free((char *)GifFile->SavedImages); + GifFile->SavedImages=NULL; +} -- cgit v1.2.3