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Diffstat (limited to 'giflib-4.1.6/util/gifwedge.c')
| -rw-r--r-- | giflib-4.1.6/util/gifwedge.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/giflib-4.1.6/util/gifwedge.c b/giflib-4.1.6/util/gifwedge.c new file mode 100644 index 0000000..c42c5fe --- /dev/null +++ b/giflib-4.1.6/util/gifwedge.c @@ -0,0 +1,176 @@ +/***************************************************************************** +* "Gif-Lib" - Yet another gif library. * +* * +* Written by: Gershon Elber Ver 0.1, Jul. 1989 * +****************************************************************************** +* Program to create a test image of White and Red/Green/Blue levels for * +* test purposes. The Primary (RGB) and Secondary (YCM) are also displayed. * +* background. * +* Options: * +* -q : quiet printing mode. * +* -s Width Height : set image size. * +* -l levels : number of color levels. * +* -h : on-line help. * +****************************************************************************** +* History: * +* 4 Jan 90 - Version 1.0 by Gershon Elber. * +*****************************************************************************/ + +#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 "GifWedge" + +#define DEFAULT_WIDTH 640 +#define DEFAULT_HEIGHT 350 + +#define DEFAULT_NUM_LEVELS 16 /* Number of colors to gen the image. */ + +#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 = "GifWedge q%- l%-#Lvls!d s%-Width|Height!d!d h%-"; +#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%- l%-#Lvls!d s%-Width|Height!d!d h%-"; +#endif /* SYSV */ + +static int + NumLevels = DEFAULT_NUM_LEVELS, + ImageWidth = DEFAULT_WIDTH, + ImageHeight = DEFAULT_HEIGHT; + +static void QuitGifError(GifFileType *GifFile); + +/****************************************************************************** +* Interpret the command line and scan the given GIF file. * +******************************************************************************/ +int main(int argc, char **argv) +{ + int i, j, l, c, Error, LevelStep, LogNumLevels, + Count = 0, LevelsFlag = FALSE, SizeFlag = FALSE, HelpFlag = FALSE; + GifRowType Line; + ColorMapObject *ColorMap; + GifFileType *GifFile; + + if ((Error = GAGetArgs(argc, argv, CtrlStr, + &GifQuietPrint, &LevelsFlag, &NumLevels, + &SizeFlag, &ImageWidth, &ImageHeight, + &HelpFlag)) != FALSE) { + GAPrintErrMsg(Error); + GAPrintHowTo(CtrlStr); + exit(EXIT_FAILURE); + } + + if (HelpFlag) { + fprintf(stderr, VersionStr); + GAPrintHowTo(CtrlStr); + exit(EXIT_SUCCESS); + } + + /* Make sure the number of levels is power of 2 (up to 32 levels.). */ + for (i = 1; i < 6; i++) if (NumLevels == (1 << i)) break; + if (i == 6) GIF_EXIT("#Lvls (-l option) is not power of 2 up to 32."); + LogNumLevels = i + 3; /* Multiple by 8 (see below). */ + LevelStep = 256 / NumLevels; + + /* Make sure the image dimension is a multiple of NumLevels horizontally */ + /* and 7 (White, Red, Green, Blue and Yellow Cyan Magenta) vertically. */ + ImageWidth = (ImageWidth / NumLevels) * NumLevels; + ImageHeight = (ImageHeight / 7) * 7; + + /* Open stdout for the output file: */ + if ((GifFile = EGifOpenFileHandle(1)) == NULL) + QuitGifError(GifFile); + + /* Dump out screen description with given size and generated color map: */ + /* The color map has 7 NumLevels colors for White, Red, Green and then */ + /* The secondary colors Yellow Cyan and magenta. */ + if ((ColorMap = MakeMapObject(8 * NumLevels, NULL)) == NULL) + GIF_EXIT("Failed to allocate memory required, aborted."); + + for (i = 0; i < 8; i++) /* Set color map. */ + for (j = 0; j < NumLevels; j++) { + l = LevelStep * j; + c = i * NumLevels + j; + ColorMap->Colors[c].Red = (i == 0 || i == 1 || i == 4 || i == 6) * l; + ColorMap->Colors[c].Green = (i == 0 || i == 2 || i == 4 || i == 5) * l; + ColorMap->Colors[c].Blue = (i == 0 || i == 3 || i == 5 || i == 6) * l; + } + + if (EGifPutScreenDesc(GifFile, + ImageWidth, ImageHeight, LogNumLevels, 0, ColorMap) + == GIF_ERROR) + QuitGifError(GifFile); + + /* Dump out the image descriptor: */ + if (EGifPutImageDesc(GifFile, + 0, 0, ImageWidth, ImageHeight, FALSE, NULL) == GIF_ERROR) + QuitGifError(GifFile); + + GifQprintf("\n%s: Image 1 at (%d, %d) [%dx%d]: ", + PROGRAM_NAME, GifFile->Image.Left, GifFile->Image.Top, + GifFile->Image.Width, GifFile->Image.Height); + + /* Allocate one scan line to be used for all image. */ + if ((Line = (GifRowType) malloc(sizeof(GifPixelType) * ImageWidth)) == NULL) + GIF_EXIT("Failed to allocate memory required, aborted."); + + /* Dump the pixels: */ + for (c = 0; c < 7; c++) { + for (i = 0, l = 0; i < NumLevels; i++) + for (j = 0; j < ImageWidth / NumLevels; j++) + Line[l++] = i + NumLevels * c; + for (i = 0; i < ImageHeight / 7; i++) { + if (EGifPutLine(GifFile, Line, ImageWidth) == GIF_ERROR) + QuitGifError(GifFile); + GifQprintf("\b\b\b\b%-4d", Count++); + } + } + + if (EGifCloseFile(GifFile) == GIF_ERROR) + QuitGifError(GifFile); + + return 0; +} + +/****************************************************************************** +* Close output file (if open), and exit. * +******************************************************************************/ +static void QuitGifError(GifFileType *GifFile) +{ + PrintGifError(); + if (GifFile != NULL) DGifCloseFile(GifFile); + exit(EXIT_FAILURE); +} |