mirror of
https://github.com/openharmony/third_party_giflib.git
synced 2026-07-01 06:41:59 -04:00
mamingshuai
362 lines
11 KiB
C
362 lines
11 KiB
C
/*****************************************************************************
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gifclrmap - extract colormaps from GIF images
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SPDX-License-Identifier: MIT
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*****************************************************************************/
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#include <math.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <string.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <assert.h>
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#include "gif_lib.h"
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#include "getarg.h"
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#define PROGRAM_NAME "gifclrmp"
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static char
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*VersionStr =
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PROGRAM_NAME
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VERSION_COOKIE
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" Gershon Elber, "
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__DATE__ ", " __TIME__ "\n"
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"(C) Copyright 1989 Gershon Elber.\n";
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static char
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*CtrlStr =
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PROGRAM_NAME
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" v%- s%- t%-TranslationFile!s l%-ColorMapFile!s g%-Gamma!F i%-Image#!d h%- GifFile!*s";
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static bool
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SaveFlag = false,
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TranslateFlag = false,
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LoadFlag = false,
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GammaFlag = false;
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static
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double Gamma = 1.0;
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static
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FILE *ColorFile = NULL;
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FILE *TranslateFile = NULL;
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static
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GifPixelType Translation[256];
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static ColorMapObject *ModifyColorMap(ColorMapObject *ColorMap);
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static void QuitGifError(GifFileType *GifFileIn, GifFileType *GifFileOut);
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/******************************************************************************
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Interpret the command line and scan the given GIF file.
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******************************************************************************/
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int main(int argc, char **argv)
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{
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int NumFiles, ExtCode, CodeSize, ImageNum = 0,
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ImageN, HasGIFOutput, ErrorCode;
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bool Error, ImageNFlag = false, HelpFlag = false;
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GifRecordType RecordType;
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GifByteType *Extension, *CodeBlock;
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char **FileName = NULL, *ColorFileName, *TranslateFileName;
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GifFileType *GifFileIn = NULL, *GifFileOut = NULL;
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if ((Error = GAGetArgs(argc, argv, CtrlStr, &GifNoisyPrint, &SaveFlag,
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&TranslateFlag, &TranslateFileName,
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&LoadFlag, &ColorFileName,
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&GammaFlag, &Gamma, &ImageNFlag, &ImageN,
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&HelpFlag, &NumFiles, &FileName)) != false ||
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(NumFiles > 1 && !HelpFlag)) {
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if (Error)
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GAPrintErrMsg(Error);
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else if (NumFiles > 1)
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GIF_MESSAGE("Error in command line parsing - one GIF file please.");
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GAPrintHowTo(CtrlStr);
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exit(EXIT_FAILURE);
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}
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if (HelpFlag) {
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(void)fprintf(stderr, VersionStr, GIFLIB_MAJOR, GIFLIB_MINOR);
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GAPrintHowTo(CtrlStr);
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exit(EXIT_SUCCESS);
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}
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if (SaveFlag + LoadFlag + GammaFlag + TranslateFlag > 1)
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GIF_EXIT("Can not handle more than one of -s -l, -t, or -g at the same time.");
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/* Default action is to dump colormaps */
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if (!SaveFlag && !LoadFlag && !GammaFlag && !TranslateFlag)
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SaveFlag = true;
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if (NumFiles == 1) {
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if ((GifFileIn = DGifOpenFileName(*FileName, &ErrorCode)) == NULL) {
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PrintGifError(ErrorCode);
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exit(EXIT_FAILURE);
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}
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}
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else {
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/* Use stdin instead: */
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if ((GifFileIn = DGifOpenFileHandle(0, &ErrorCode)) == NULL) {
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PrintGifError(ErrorCode);
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exit(EXIT_FAILURE);
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}
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}
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if (SaveFlag) {
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/* We are dumping out the color map as text file to stdout: */
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ColorFile = stdout;
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}
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else {
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if (TranslateFlag) {
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/* We are loading new color map from specified file: */
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if ((TranslateFile = fopen(TranslateFileName, "rt")) == NULL)
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GIF_EXIT("Failed to open specified color translation file.");
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}
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if (LoadFlag) {
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/* We are loading new color map from specified file: */
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if ((ColorFile = fopen(ColorFileName, "rt")) == NULL)
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GIF_EXIT("Failed to open specified color map file.");
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}
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}
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if ((HasGIFOutput = (LoadFlag || TranslateFlag || GammaFlag)) != 0) {
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/* Open stdout for GIF output file: */
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if ((GifFileOut = EGifOpenFileHandle(1, &ErrorCode)) == NULL) {
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PrintGifError(ErrorCode);
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exit(EXIT_FAILURE);
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}
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}
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if (!ImageNFlag) {
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/* We are supposed to modify the screen color map, so do it: */
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if (!GifFileIn->SColorMap)
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GIF_EXIT("No colormap to modify");
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GifFileIn->SColorMap = ModifyColorMap(GifFileIn->SColorMap);
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if (!HasGIFOutput) {
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/* We can quit here, as we have the color map: */
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DGifCloseFile(GifFileIn, NULL);
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fclose(ColorFile);
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exit(EXIT_SUCCESS);
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}
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}
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/* And dump out its new possible repositioned screen information: */
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if (HasGIFOutput)
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if (EGifPutScreenDesc(GifFileOut,
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GifFileIn->SWidth, GifFileIn->SHeight,
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GifFileIn->SColorResolution, GifFileIn->SBackGroundColor,
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GifFileIn->SColorMap) == GIF_ERROR)
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QuitGifError(GifFileIn, GifFileOut);
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/* Scan the content of the GIF file and load the image(s) in: */
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do {
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if (DGifGetRecordType(GifFileIn, &RecordType) == GIF_ERROR)
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QuitGifError(GifFileIn, GifFileOut);
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switch (RecordType) {
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case IMAGE_DESC_RECORD_TYPE:
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if (DGifGetImageDesc(GifFileIn) == GIF_ERROR)
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QuitGifError(GifFileIn, GifFileOut);
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if ((++ImageNum == ImageN) && ImageNFlag) {
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/* We are suppose to modify this image color map, do it: */
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GifFileIn->SColorMap =ModifyColorMap(GifFileIn->SColorMap);
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if (!HasGIFOutput) {
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/* We can quit here, as we have the color map: */
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DGifCloseFile(GifFileIn, NULL);
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fclose(ColorFile);
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exit(EXIT_SUCCESS);
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}
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}
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if (HasGIFOutput)
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if (EGifPutImageDesc(GifFileOut,
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GifFileIn->Image.Left, GifFileIn->Image.Top,
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GifFileIn->Image.Width, GifFileIn->Image.Height,
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GifFileIn->Image.Interlace,
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GifFileIn->Image.ColorMap) == GIF_ERROR)
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QuitGifError(GifFileIn, GifFileOut);
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if (!TranslateFlag || (ImageNFlag && (ImageN != ImageNum)))
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{
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/* Now read image itself in decoded form as we don't */
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/* really care what we have there, and this is much */
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/* faster. */
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if (DGifGetCode(GifFileIn, &CodeSize, &CodeBlock) == GIF_ERROR)
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QuitGifError(GifFileIn, GifFileOut);
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if (HasGIFOutput)
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if (EGifPutCode(GifFileOut, CodeSize, CodeBlock) == GIF_ERROR)
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QuitGifError(GifFileIn, GifFileOut);
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while (CodeBlock != NULL) {
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if (DGifGetCodeNext(GifFileIn, &CodeBlock) == GIF_ERROR)
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QuitGifError(GifFileIn, GifFileOut);
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if (HasGIFOutput)
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if (EGifPutCodeNext(GifFileOut, CodeBlock) == GIF_ERROR)
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QuitGifError(GifFileIn, GifFileOut);
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}
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}
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else /* we need to mung pixels intices */
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{
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int i;
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register GifPixelType *cp;
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GifPixelType *Line
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= (GifPixelType *) malloc(GifFileIn->Image.Width *
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sizeof(GifPixelType));
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for (i = 0; i < GifFileIn->Image.Height; i++) {
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if (DGifGetLine(GifFileIn, Line,GifFileIn->Image.Width)
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== GIF_ERROR) {
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QuitGifError(GifFileIn, GifFileOut);
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}
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/* translation step goes here */
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for (cp = Line; cp < Line+GifFileIn->Image.Width; cp++)
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*cp = Translation[*cp];
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if (EGifPutLine(GifFileOut,
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Line, GifFileIn->Image.Width)
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== GIF_ERROR) {
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QuitGifError(GifFileIn, GifFileOut);
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}
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}
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free((char *) Line);
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}
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break;
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case EXTENSION_RECORD_TYPE:
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assert(GifFileOut != NULL); /* might pacify Coverity */
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/* pass through extension records */
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if (DGifGetExtension(GifFileIn, &ExtCode, &Extension) == GIF_ERROR)
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QuitGifError(GifFileIn, GifFileOut);
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if (Extension == NULL)
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break;
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if (EGifPutExtensionLeader(GifFileOut, ExtCode) == GIF_ERROR)
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QuitGifError(GifFileIn, GifFileOut);
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if (EGifPutExtensionBlock(GifFileOut,
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Extension[0],
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Extension + 1) == GIF_ERROR)
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QuitGifError(GifFileIn, GifFileOut);
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while (Extension != NULL) {
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if (DGifGetExtensionNext(GifFileIn, &Extension)==GIF_ERROR)
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QuitGifError(GifFileIn, GifFileOut);
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if (Extension != NULL)
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if (EGifPutExtensionBlock(GifFileOut,
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Extension[0],
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Extension + 1) == GIF_ERROR)
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QuitGifError(GifFileIn, GifFileOut);
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}
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if (EGifPutExtensionTrailer(GifFileOut) == GIF_ERROR)
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QuitGifError(GifFileIn, GifFileOut);
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break;
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case TERMINATE_RECORD_TYPE:
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break;
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default: /* Should be trapped by DGifGetRecordType. */
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break;
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}
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}
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while (RecordType != TERMINATE_RECORD_TYPE);
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if (DGifCloseFile(GifFileIn, &ErrorCode) == GIF_ERROR)
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{
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PrintGifError(ErrorCode);
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exit(EXIT_FAILURE);
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}
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if (HasGIFOutput)
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if (EGifCloseFile(GifFileOut, &ErrorCode) == GIF_ERROR)
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{
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PrintGifError(ErrorCode);
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exit(EXIT_FAILURE);
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}
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return 0;
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}
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/******************************************************************************
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Modify the given colormap according to global variables setting.
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******************************************************************************/
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static ColorMapObject *ModifyColorMap(ColorMapObject *ColorMap)
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{
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int i, Dummy, Red, Green, Blue;
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if (SaveFlag) {
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/* Save this color map to ColorFile: */
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for (i = 0; i < ColorMap->ColorCount; i++)
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fprintf(ColorFile, "%3d %3d %3d %3d\n", i,
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ColorMap->Colors[i].Red,
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ColorMap->Colors[i].Green,
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ColorMap->Colors[i].Blue);
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return(ColorMap);
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}
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else if (LoadFlag) {
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/* Read the color map in ColorFile into this color map: */
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for (i = 0; i < ColorMap->ColorCount; i++) {
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if (feof(ColorFile))
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GIF_EXIT("Color file to load color map from, too small.");
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if (fscanf(ColorFile, "%3d %3d %3d %3d\n", &Dummy, &Red, &Green, &Blue) == 4) {
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ColorMap->Colors[i].Red = Red;
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ColorMap->Colors[i].Green = Green;
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ColorMap->Colors[i].Blue = Blue;
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}
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}
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return(ColorMap);
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}
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else if (GammaFlag) {
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/* Apply gamma correction to this color map: */
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double Gamma1 = 1.0 / Gamma;
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for (i = 0; i < ColorMap->ColorCount; i++) {
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ColorMap->Colors[i].Red =
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((int) (255 * pow(ColorMap->Colors[i].Red / 255.0, Gamma1)));
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ColorMap->Colors[i].Green =
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((int) (255 * pow(ColorMap->Colors[i].Green / 255.0, Gamma1)));
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ColorMap->Colors[i].Blue =
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((int) (255 * pow(ColorMap->Colors[i].Blue / 255.0, Gamma1)));
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}
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return(ColorMap);
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}
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else if (TranslateFlag) {
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ColorMapObject *NewMap;
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int Max = 0;
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/* Read the translation table in TranslateFile: */
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for (i = 0; i < ColorMap->ColorCount; i++) {
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int tmp;
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if (feof(TranslateFile))
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GIF_EXIT("Color file to load color map from, too small.");
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if (fscanf(TranslateFile, "%3d %3d\n", &Dummy, &tmp) == 2) {
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Translation[i] = tmp & 0xff;
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if (Translation[i] > Max)
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Max = Translation[i];
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}
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}
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if ((NewMap = GifMakeMapObject(1 << GifBitSize(Max+1), NULL)) == NULL)
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GIF_EXIT("Out of memory while allocating color map!");
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/* Apply the translation; we'll do it to the pixels, too */
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for (i = 0; i < ColorMap->ColorCount; i++) {
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NewMap->Colors[i] = ColorMap->Colors[Translation[i]];
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}
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return(NewMap);
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}
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else
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{
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GIF_EXIT("Nothing to do!");
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return(ColorMap);
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}
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}
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/******************************************************************************
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Close both input and output file (if open), and exit.
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******************************************************************************/
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static void QuitGifError(GifFileType *GifFileIn, GifFileType *GifFileOut)
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{
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if (GifFileIn != NULL) {
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PrintGifError(GifFileIn->Error);
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EGifCloseFile(GifFileIn, NULL);
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}
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if (GifFileOut != NULL) {
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PrintGifError(GifFileOut->Error);
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EGifCloseFile(GifFileOut, NULL);
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}
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exit(EXIT_FAILURE);
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}
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/* end */
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