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-rw-r--r--tools/gifconv/gif2mem.c344
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diff --git a/tools/gifconv/gif2mem.c b/tools/gifconv/gif2mem.c
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-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
- * Copyright by the Board of Trustees of the University of Illinois. *
- * All rights reserved. *
- * *
- * This file is part of HDF5. The full HDF5 copyright notice, including *
- * terms governing use, modification, and redistribution, is contained in *
- * the files COPYING and Copyright.html. COPYING can be found at the root *
- * of the source code distribution tree; Copyright.html can be found at the *
- * root level of an installed copy of the electronic HDF5 document set and *
- * is linked from the top-level documents page. It can also be found at *
- * http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have *
- * access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
-/*
- * This file contains snippets of code from James Murray's original file to
- * display the GIF header information, but most of it has been modified to
- * suit gif2hdf
- */
-
-/****************************************************************************\
-** Title: GIFHEAD.C **
-** Purpose: Display the data in a GIF image file. **
-** Version: 1.0 **
-** Date: March 1992 **
-** Author: James D. Murray, Anaheim, CA, USA **
-** C Compilers: Borland C++ v2.0, Microsoft C v6.00a **
-** **
-** GIFHEAD displays all real information contained within a GIF image **
-** file, including all color tables and extension block information. **
-** GIFHEAD reads both GIF 87a abd 89a-format files. **
-** **
-** Copyright (C) 1991-92 by Graphics Software Labs. All rights reserved. **
-\****************************************************************************/
-#include <stdio.h>
-
-#include "gif.h"
-
-#define VERSION "1.00"
-
-GIFTOMEM
-Gif2Mem(BYTE *MemGif)
-{
- /*
- * The gif structure outline for passing data to memory is given in gif.h.
- * These pointers are redunant, should take them out in ver. 2
- */
- GIFHEAD *gifHead; /* GIF Header structure */
- GIFIMAGEDESC **gifImageDesc; /* Logical Image Descriptor struct */
- GIFPLAINTEXT **gifPlainText; /* Plain Text Extension structure */
- GIFAPPLICATION **gifApplication; /* Application Extension structure */
- GIFCOMMENT **gifComment; /* Comment Extension structure */
- GIFGRAPHICCONTROL **gifGraphicControl; /* Graphic Control Extension strct */
-
- GIFTOMEM GifMemoryStruct;
-
- register WORD i; /* Loop counter */
- BYTE Identifier; /* Extension block identifier holder */
- BYTE Label; /* Extension block label holder */
- BYTE ImageCount; /* Count of the number of images in the file */
- BYTE ImageArray; /* Keep the size of the array to store Images */
- BYTE CommentCount;
- BYTE CommentArray;
- BYTE ApplicationCount;
- BYTE ApplicationArray;
- BYTE PlainTextCount;
- BYTE PlainTextArray;
- BYTE GCEflag;
- BYTE aTemp;
- BYTE j;
- BYTE w; /* Two more variables needed only while testing */
- BYTE *b; /* Endian Ordering */
-
- /* Allocate memory for the GIF structures */
- /* Plug the structs into GifMemoryStruct at the end */
- /****************************************************/
- if (!(gifHead = (GIFHEAD *)malloc(sizeof(GIFHEAD)))) {
- printf("Could not allocate memory for gifHead\n");
- exit(-1);
- }
-
- /*
- * The next three have to grow dynamically so we leave them for now and
- * let realloc handle it later on.
- */
- gifImageDesc = NULL;
- gifPlainText = NULL;
- gifGraphicControl = NULL;
- gifComment = NULL;
- gifApplication = NULL;
-
- /******************************/
- /* Memory allocation complete */
- /******************************/
-
- /* Carry out Endian Testing and set Endian Order */
- w = 0x0001;
- b = (BYTE *) &w;
- EndianOrder = (b[0] ? 1 : 0);
-
- /* Read the GIF image file header information */
- ReadGifHeader(gifHead, &MemGif);
-
- /* Check for FILE stream error */
-#if 0
- if (ferror(fpGif))
- {
- fputs("GIFHEAD: Error reading header information!\n", stderr);
- exit(-3);
- }
-#endif /* 0 */
-
- /*
- * Identify, read, and display block information.
- */
- ImageCount = ImageArray = 0;
- CommentCount = CommentArray = 0;
- ApplicationCount = ApplicationArray = 0;
- PlainTextCount = PlainTextArray = 0;
- GCEflag = 0;
-
- for (;;) {
- Identifier = *MemGif++;
-
- switch (Identifier) {
- case 0x3B: /* Trailer */
- /*
- * The counts are stored to make it easier while putting stuff
- * into the HDF file and then deallocating space.
- */
- gifHead->ImageCount = ImageCount;
- gifHead->CommentCount = CommentCount;
- gifHead->ApplicationCount = ApplicationCount;
- gifHead->PlainTextCount = PlainTextCount;
-
- /* putting stuff into the gif2mem structure */
- GifMemoryStruct.GifHeader = gifHead;
- GifMemoryStruct.GifImageDesc = gifImageDesc;
- GifMemoryStruct.GifPlainTextExtension = gifPlainText;
- GifMemoryStruct.GifApplicationExtension = gifApplication;
- GifMemoryStruct.GifCommentExtension = gifComment;
- GifMemoryStruct.GifGraphicControlExtension = gifGraphicControl;
-
- /* return the struct */
- return GifMemoryStruct;
-
- case 0x2C: /* Image Descriptor */
- /*
- * If there was no image descriptor before this increase image
- * count. If an imagedescriptor was present, reset GCEflag
- */
- if (GCEflag == 0)
- ImageCount++;
- else
- GCEflag = 0;
-
- if (ImageCount > ImageArray) {
- aTemp = ImageArray;
- ImageArray = (ImageArray << 1) + 1;
- if (!(gifImageDesc = (GIFIMAGEDESC **)realloc(gifImageDesc,
- sizeof(GIFIMAGEDESC *) * ImageArray))) {
- printf("Out of memory!");
- exit(-1);
- }
-
- if (!(gifGraphicControl = (GIFGRAPHICCONTROL **)realloc(
- gifGraphicControl,
- sizeof(GIFGRAPHICCONTROL *) * ImageArray))) {
- printf("Out of memory!");
- exit(-1);
- }
-
- for (j = aTemp ; j < ImageArray ; j++) {
- gifGraphicControl[j] = NULL;
- gifImageDesc[j] = NULL;
- }
- }
-
- if(!(gifImageDesc[ImageCount-1] = (GIFIMAGEDESC*)malloc(sizeof(GIFIMAGEDESC)))) {
- printf("Out of memory!");
- exit(-1);
- }
-
-
- if (ReadGifImageDesc(gifImageDesc[ImageCount-1], &MemGif) == -1)
- fputs("Error reading Image Descriptor information\n", stderr);
-
- /* Decompress the Image */
- gifImageDesc[ImageCount-1]->Image = Decompress(gifImageDesc[ImageCount-1],
- gifHead);
- free(gifImageDesc[ImageCount-1]->GIFImage);
-
- /*
- * Convert the local palette into an HDF compatible palette In
- * case the local color table is present, it is written out as
- * the HDFPalette If it is absent the global table is written
- * as the HDFPalette.
- */
- if (!((gifImageDesc[ImageCount-1]->PackedField) & 0x80)) {
- /* Check to see if the global color table exists.... */
- if (gifHead->PackedField & 0x80) {
- for (i=0 ; i<gifHead->TableSize ; i++) {
- gifImageDesc[ImageCount-1]->HDFPalette[i][0] =
- gifHead->HDFPalette[i][0];
- gifImageDesc[ImageCount-1]->HDFPalette[i][1] =
- gifHead->HDFPalette[i][1];
- gifImageDesc[ImageCount-1]->HDFPalette[i][2] =
- gifHead->HDFPalette[i][2];
- }
- }
-
- gifImageDesc[ImageCount-1]->TableSize = gifHead->TableSize;
- }
-
- break;
-
- case 0x21: /* Extension Block */
- Label = *MemGif++;
-
- switch (Label) {
- case 0x01: /* Plain Text Extension */
- puts("Plain Text Extension\n");
- PlainTextCount++;
-
- if (PlainTextCount > PlainTextArray)
- PlainTextArray = (PlainTextArray << 1) + 1;
-
- if (!(gifPlainText = (GIFPLAINTEXT **)realloc(gifPlainText , sizeof(GIFPLAINTEXT *) * PlainTextArray))) {
- printf("Out of memory!");
- exit(-1);
- }
-
- if(!(gifPlainText[PlainTextCount - 1] = (GIFPLAINTEXT*)malloc(sizeof(GIFPLAINTEXT)))) {
- printf("Out of memory!");
- exit(-1);
- }
-
- if (ReadGifPlainText(gifPlainText[PlainTextCount - 1], &MemGif))
- fprintf(stderr,
- "Error reading Plain Text Extension information.\n");
-
- break;
-
- case 0xFE: /* Comment Extension */
- CommentCount++;
-
- if (CommentCount > CommentArray)
- CommentArray = (CommentArray << 1) + 1;
-
- if (!(gifComment = (GIFCOMMENT **)realloc(gifComment , sizeof(GIFCOMMENT *) * CommentArray))) {
- printf("Out of memory!");
- exit(-1);
- }
-
- if(!(gifComment[CommentCount - 1] = (GIFCOMMENT *)malloc(sizeof(GIFCOMMENT)))) {
- printf("Out of memory!");
- exit(-1);
- }
-
-
- if (ReadGifComment(gifComment[CommentCount - 1], &MemGif))
- fprintf(stderr,
- "Error reading Comment Extension information\n");
-
- break;
-
- case 0xF9: /* Graphic Control Extension */
- if (GCEflag == 0 )
- ImageCount++;
-
- GCEflag = 1;
-
- if (ImageCount > ImageArray) {
- aTemp = ImageArray;
- ImageArray = (ImageArray << 1) + 1;
-
- if (!(gifGraphicControl = (GIFGRAPHICCONTROL **)realloc(gifGraphicControl , sizeof(GIFGRAPHICCONTROL *) * ImageArray))) {
- printf("Out of memory!");
- exit(-1);
- }
-
- if (!(gifImageDesc = (GIFIMAGEDESC **)realloc(gifImageDesc , sizeof(GIFIMAGEDESC *) * ImageArray))) {
- printf("Out of memory!");
- exit(-1);
- }
-
- for (j = aTemp ; j < ImageArray ; j++) {
- gifGraphicControl[j] = NULL;
- gifImageDesc[j] = NULL;
- }
- }
-
- if(!(gifGraphicControl[ImageCount-1] = (GIFGRAPHICCONTROL*)malloc(sizeof(GIFGRAPHICCONTROL)))) {
- printf("Out of memory!");
- exit(-1);
- }
-
-
- if (ReadGifGraphicControl(gifGraphicControl[ImageCount-1], &MemGif))
- fprintf(stderr,
- "Error reading Graphic Control Extension information\n");
-
- if (!*MemGif++ == 0)
- fprintf(stderr,
- "Error reading Graphic Control Extension\n");
-
- break;
-
- case 0xFF: /* Application Extension */
- ApplicationCount++;
-
- if (ApplicationCount > ApplicationArray)
- ApplicationArray = (ApplicationArray << 1) + 1;
-
- if (!(gifApplication = (GIFAPPLICATION **)realloc(gifApplication , sizeof(GIFAPPLICATION *) * ApplicationArray))) {
- printf("Out of memory!");
- exit(-1);
- }
-
- if(!(gifApplication[ApplicationCount - 1] = (GIFAPPLICATION *)malloc(sizeof(GIFAPPLICATION)))) {
- printf("Out of memory!");
- exit(-1);
- }
-
-
- if (ReadGifApplication(gifApplication[ApplicationCount - 1], &MemGif))
- fprintf(stderr,
- "Error reading Application Extension information\n");
-
- break;
-
- default:
- printf("Unknown Extension Label: 0x%02x\n", Label);
- break;
- }
-
- break;
-
- default:
- fprintf(stderr,
- "Unknown Block Separator Character: 0x%02x\n", Identifier);
- }
- }
-}
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