diff options
Diffstat (limited to 'giflib-4.1.6/util/gifrsize.c')
| -rw-r--r-- | giflib-4.1.6/util/gifrsize.c | 315 |
1 files changed, 0 insertions, 315 deletions
diff --git a/giflib-4.1.6/util/gifrsize.c b/giflib-4.1.6/util/gifrsize.c deleted file mode 100644 index 69ca6e0..0000000 --- a/giflib-4.1.6/util/gifrsize.c +++ /dev/null @@ -1,315 +0,0 @@ -/***************************************************************************** -* "Gif-Lib" - Yet another gif library. * -* * -* Written by: Gershon Elber Ver 0.1, Jul. 1989 * -****************************************************************************** -* Program to resize GIF by given factors horizontally and vertically. * -* Options: * -* -q : quiet printing mode. * -* -S x y : scale into size as specified by x and y. * -* -s r : resize both x & y direction by factor r. * -* -x r : resize the x direction (horizontally) by factor r. * -* -y r : resize the y direction (vertically) by factor r. * -* -h : on-line help. * -****************************************************************************** -* History: * -* 4 Jul 89 - Version 1.0 by Gershon Elber. * -* 22 Dec 89 - Fix minor bag in discarding last line of input (Version 1.1). * -* 3 Aug 91 - make it scale by an arbitrary size value. * -*****************************************************************************/ - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif - -#ifdef __MSDOS__ -#include <stdlib.h> -#include <alloc.h> -#endif /* __MSDOS__ */ - -#ifndef __MSDOS__ -#include <stdlib.h> -#endif -#include <stdio.h> -#include <ctype.h> -#include <string.h> -#include "gif_lib.h" -#include "getarg.h" - -#define PROGRAM_NAME "GifRSize" - -#define MAX_SCALE 16.0 /* Maximum scaling factor. */ - -#ifdef __MSDOS__ -extern unsigned int - _stklen = 16384; /* Increase default stack size. */ -#endif /* __MSDOS__ */ - -#ifdef SYSV -static char *VersionStr = - "Gif toolkit module,\t\tGershon Elber\n\ - (C) Copyright 1989 Gershon Elber.\n"; -static char - *CtrlStr = "GifRSize q%- S%-X|Y!d!d s%-Scale!F x%-XScale!F y%-YScale!F h%- GifFile!*s"; -#else -static char - *VersionStr = - PROGRAM_NAME - GIF_LIB_VERSION - " Gershon Elber, " - __DATE__ ", " __TIME__ "\n" - "(C) Copyright 1989 Gershon Elber.\n"; -static char - *CtrlStr = - PROGRAM_NAME - " q%- S%-X|Y!d!d s%-Scale!F x%-XScale!F y%-YScale!F h%- GifFile!*s"; -#endif /* SYSV */ - -/* Make some variables global, so we could access them faster: */ -static GifPixelType - BackGroundColor = 0; -static double - XScale = 0.5, - YScale = 0.5; -static int - XSize = 0, - YSize = 0; - -static void ResizeLine(GifRowType LineIn, GifRowType LineOut, - int InLineLen, int OutLineLen); -static void QuitGifError(GifFileType *GifFileIn, GifFileType *GifFileOut); - -/****************************************************************************** -* Interpret the command line and scan the given GIF file. * -******************************************************************************/ -int main(int argc, char **argv) -{ - int i, iy, last_iy, l, t, w, h, Error, NumFiles, ExtCode, - ImageNum = 0, - SizeFlag = FALSE, - ScaleFlag = FALSE, - XScaleFlag = FALSE, - YScaleFlag = FALSE, - HelpFlag = FALSE; - double Scale, y; - GifRecordType RecordType; - char s[80]; - GifByteType *Extension; - GifRowType LineIn, LineOut; - char **FileName = NULL; - GifFileType *GifFileIn = NULL, *GifFileOut = NULL; - - if ((Error = GAGetArgs(argc, argv, CtrlStr, - &GifQuietPrint, &SizeFlag, &XSize, &YSize, &ScaleFlag, &Scale, - &XScaleFlag, &XScale, &YScaleFlag, &YScale, - &HelpFlag, &NumFiles, &FileName)) != FALSE || - (NumFiles > 1 && !HelpFlag)) { - if (Error) - GAPrintErrMsg(Error); - else if (NumFiles > 1) - GIF_MESSAGE("Error in command line parsing - one GIF file please."); - GAPrintHowTo(CtrlStr); - exit(EXIT_FAILURE); - } - - if (HelpFlag) { - fprintf(stderr, VersionStr); - GAPrintHowTo(CtrlStr); - exit(EXIT_SUCCESS); - } - - /* If specific direction was set, set other direction to 1: */ - if (!XScaleFlag && YScaleFlag) XScale = 1.0; - if (!YScaleFlag && XScaleFlag) YScale = 1.0; - - /* If the specific direction was not set, but global one did use it: */ - if (!XScaleFlag && ScaleFlag) XScale = Scale; - if (!YScaleFlag && ScaleFlag) YScale = Scale; - - if (XScale > MAX_SCALE) { - sprintf(s, "XScale too big, maximum scale selected instead (%f).", - MAX_SCALE); - GIF_MESSAGE(s); - XScale = MAX_SCALE; - } - if (YScale > MAX_SCALE) { - sprintf(s, "YScale too big, maximum scale selected instead (%f).", - MAX_SCALE); - GIF_MESSAGE(s); - YScale = MAX_SCALE; - } - - if (NumFiles == 1) { - if ((GifFileIn = DGifOpenFileName(*FileName)) == NULL) - QuitGifError(GifFileIn, GifFileOut); - } - else { - /* Use the stdin instead: */ - if ((GifFileIn = DGifOpenFileHandle(0)) == NULL) - QuitGifError(GifFileIn, GifFileOut); - } - BackGroundColor = GifFileIn->SBackGroundColor; - - /* If size was specified, it is used to derive the scale: */ - if (SizeFlag) { - XScale = XSize / ((double) GifFileIn->SWidth); - YScale = YSize / ((double) GifFileIn->SHeight); - } - else - { - XSize = (int) (GifFileIn->SWidth * XScale + 0.5); - YSize = (int) (GifFileIn->SHeight * YScale + 0.5); - } - - /* As at this time we know the Screen size of the input gif file, and as */ - /* all image(s) in file must be less/equal to it, we can allocate the */ - /* scan lines for the input file, and output file. The number of lines */ - /* to allocate for each is set by ScaleDown & XScale & YScale: */ - LineOut = (GifRowType) malloc(XSize * sizeof(GifPixelType)); - LineIn = (GifRowType) malloc(GifFileIn->SWidth * sizeof(GifPixelType)); - - /* Open stdout for the output file: */ - if ((GifFileOut = EGifOpenFileHandle(1)) == NULL) - QuitGifError(GifFileIn, GifFileOut); - - /* And dump out its new scaled screen information: */ - if (EGifPutScreenDesc(GifFileOut, XSize, YSize, - GifFileIn->SColorResolution, GifFileIn->SBackGroundColor, - GifFileIn->SColorMap) == GIF_ERROR) - QuitGifError(GifFileIn, GifFileOut); - - /* Scan the content of the GIF file and load the image(s) in: */ - do { - if (DGifGetRecordType(GifFileIn, &RecordType) == GIF_ERROR) - QuitGifError(GifFileIn, GifFileOut); - - switch (RecordType) { - case IMAGE_DESC_RECORD_TYPE: - if (DGifGetImageDesc(GifFileIn) == GIF_ERROR) - QuitGifError(GifFileIn, GifFileOut); - /* Put the image descriptor to out file: */ - l = (int) (GifFileIn->Image.Left * XScale + 0.5); - w = (int) (GifFileIn->Image.Width * XScale + 0.5); - t = (int) (GifFileIn->Image.Top * YScale + 0.5); - h = (int) (GifFileIn->Image.Height * YScale + 0.5); - if (l < 0) l = 0; - if (t < 0) t = 0; - if (l + w > XSize) w = XSize - l; - if (t + h > YSize) h = YSize - t; - - if (EGifPutImageDesc(GifFileOut, l, t, w, h, - GifFileIn->Image.Interlace, - GifFileIn->Image.ColorMap) == GIF_ERROR) - QuitGifError(GifFileIn, GifFileOut); - - if (GifFileIn->Image.Interlace) { - GIF_EXIT("Cannt resize interlaced images - use GifInter first."); - } - else { - GifQprintf("\n%s: Image %d at (%d, %d) [%dx%d]: ", - PROGRAM_NAME, ++ImageNum, - GifFileOut->Image.Left, GifFileOut->Image.Top, - GifFileOut->Image.Width, GifFileOut->Image.Height); - - for (i = GifFileIn->Image.Height, y = 0.0, last_iy = -1; - i-- > 0; - y += YScale) { - if (DGifGetLine(GifFileIn, LineIn, - GifFileIn->Image.Width) == GIF_ERROR) - QuitGifError(GifFileIn, GifFileOut); - - iy = (int) y; - if (last_iy < iy && last_iy < YSize) { - ResizeLine(LineIn, LineOut, - GifFileIn->Image.Width, GifFileOut->Image.Width); - - for (; - last_iy < iy && last_iy < GifFileOut->Image.Height - 1; - last_iy++) { - GifQprintf("\b\b\b\b%-4d", last_iy + 1); - if (EGifPutLine(GifFileOut, LineOut, - GifFileOut->Image.Width) == - GIF_ERROR) - QuitGifError(GifFileIn, GifFileOut); - } - } - } - - /* If scale is not dividable - dump last lines: */ - while (++last_iy < GifFileOut->Image.Height) { - GifQprintf("\b\b\b\b%-4d", last_iy); - if (EGifPutLine(GifFileOut, LineOut, - GifFileOut->Image.Width) == GIF_ERROR) - QuitGifError(GifFileIn, GifFileOut); - } - } - break; - case EXTENSION_RECORD_TYPE: - /* Skip any extension blocks in file: */ - if (DGifGetExtension(GifFileIn, &ExtCode, &Extension) == GIF_ERROR) - QuitGifError(GifFileIn, GifFileOut); - if (EGifPutExtension(GifFileOut, ExtCode, Extension[0], - Extension) == GIF_ERROR) - QuitGifError(GifFileIn, GifFileOut); - - /* No support to more than one extension blocks, so discard: */ - while (Extension != NULL) { - if (DGifGetExtensionNext(GifFileIn, &Extension) == GIF_ERROR) - QuitGifError(GifFileIn, GifFileOut); - } - break; - case TERMINATE_RECORD_TYPE: - break; - default: /* Should be traps by DGifGetRecordType. */ - break; - } - } - while (RecordType != TERMINATE_RECORD_TYPE); - - if (DGifCloseFile(GifFileIn) == GIF_ERROR) - QuitGifError(GifFileIn, GifFileOut); - if (EGifCloseFile(GifFileOut) == GIF_ERROR) - QuitGifError(GifFileIn, GifFileOut); - - free(LineOut); - free(LineIn); - - return 0; -} - -/****************************************************************************** -* Line resizing routine - scale given lines as follows: * -* Scale (by pixel duplication/elimination) from InLineLen to OutLineLen. * -******************************************************************************/ -static void ResizeLine(GifRowType LineIn, GifRowType LineOut, - int InLineLen, int OutLineLen) -{ - int i, ix, last_ix; - double x; - - OutLineLen--; - - for (i = InLineLen, x = 0.0, last_ix = -1; - i-- > 0; - x += XScale, LineIn++) - { - ix = (int) x; - for (; last_ix < ix && last_ix < OutLineLen; last_ix++) - *LineOut++ = *LineIn; - } - - /* Make sure the line is complete. */ - for (LineIn--; last_ix < OutLineLen; last_ix++) - *LineOut++ = *LineIn; -} - -/****************************************************************************** -* Close both input and output file (if open), and exit. * -******************************************************************************/ -static void QuitGifError(GifFileType *GifFileIn, GifFileType *GifFileOut) -{ - PrintGifError(); - if (GifFileIn != NULL) DGifCloseFile(GifFileIn); - if (GifFileOut != NULL) EGifCloseFile(GifFileOut); - exit(EXIT_FAILURE); -} |