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a003adc409
Update
Description:
Updated copyright statement
Platforms tested:
Linux (Only change in comments...checked if compiles)
Misc. update:
345 lines
15 KiB
C
345 lines
15 KiB
C
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Copyright by the Board of Trustees of the University of Illinois. *
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* All rights reserved. *
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* *
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* This file is part of HDF5. The full HDF5 copyright notice, including *
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* terms governing use, modification, and redistribution, is contained in *
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* the files COPYING and Copyright.html. COPYING can be found at the root *
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* of the source code distribution tree; Copyright.html can be found at the *
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* root level of an installed copy of the electronic HDF5 document set and *
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* is linked from the top-level documents page. It can also be found at *
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* http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have *
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* access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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/*
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* This file contains snippets of code from James Murray's original file to
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* display the GIF header information, but most of it has been modified to
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* suit gif2hdf
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*/
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/****************************************************************************\
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** Title: GIFHEAD.C **
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** Purpose: Display the data in a GIF image file. **
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** Version: 1.0 **
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** Date: March 1992 **
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** Author: James D. Murray, Anaheim, CA, USA **
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** C Compilers: Borland C++ v2.0, Microsoft C v6.00a **
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** **
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** GIFHEAD displays all real information contained within a GIF image **
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** file, including all color tables and extension block information. **
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** GIFHEAD reads both GIF 87a abd 89a-format files. **
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** **
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** Copyright (C) 1991-92 by Graphics Software Labs. All rights reserved. **
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\****************************************************************************/
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#include <stdio.h>
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#include "gif.h"
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#define VERSION "1.00"
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GIFTOMEM
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Gif2Mem(BYTE *MemGif)
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{
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/*
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* The gif structure outline for passing data to memory is given in gif.h.
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* These pointers are redunant, should take them out in ver. 2
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*/
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GIFHEAD *gifHead; /* GIF Header structure */
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GIFIMAGEDESC **gifImageDesc; /* Logical Image Descriptor struct */
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GIFPLAINTEXT **gifPlainText; /* Plain Text Extension structure */
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GIFAPPLICATION **gifApplication; /* Application Extension structure */
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GIFCOMMENT **gifComment; /* Comment Extension structure */
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GIFGRAPHICCONTROL **gifGraphicControl; /* Graphic Control Extension strct */
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GIFTOMEM GifMemoryStruct;
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register WORD i; /* Loop counter */
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BYTE Identifier; /* Extension block identifier holder */
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BYTE Label; /* Extension block label holder */
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BYTE ImageCount; /* Count of the number of images in the file */
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BYTE ImageArray; /* Keep the size of the array to store Images */
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BYTE CommentCount;
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BYTE CommentArray;
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BYTE ApplicationCount;
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BYTE ApplicationArray;
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BYTE PlainTextCount;
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BYTE PlainTextArray;
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BYTE GCEflag;
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BYTE aTemp;
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BYTE j;
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BYTE w; /* Two more variables needed only while testing */
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BYTE *b; /* Endian Ordering */
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/* Allocate memory for the GIF structures */
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/* Plug the structs into GifMemoryStruct at the end */
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/****************************************************/
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if (!(gifHead = (GIFHEAD *)malloc(sizeof(GIFHEAD)))) {
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printf("Could not allocate memory for gifHead\n");
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exit(-1);
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}
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/*
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* The next three have to grow dynamically so we leave them for now and
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* let realloc handle it later on.
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*/
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gifImageDesc = NULL;
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gifPlainText = NULL;
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gifGraphicControl = NULL;
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gifComment = NULL;
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gifApplication = NULL;
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/******************************/
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/* Memory allocation complete */
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/******************************/
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/* Carry out Endian Testing and set Endian Order */
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w = 0x0001;
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b = (BYTE *) &w;
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EndianOrder = (b[0] ? 1 : 0);
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/* Read the GIF image file header information */
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ReadGifHeader(gifHead, &MemGif);
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/* Check for FILE stream error */
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#if 0
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if (ferror(fpGif))
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{
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fputs("GIFHEAD: Error reading header information!\n", stderr);
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exit(-3);
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}
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#endif /* 0 */
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/*
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* Identify, read, and display block information.
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*/
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ImageCount = ImageArray = 0;
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CommentCount = CommentArray = 0;
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ApplicationCount = ApplicationArray = 0;
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PlainTextCount = PlainTextArray = 0;
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GCEflag = 0;
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for (;;) {
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Identifier = *MemGif++;
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switch (Identifier) {
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case 0x3B: /* Trailer */
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/*
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* The counts are stored to make it easier while putting stuff
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* into the HDF file and then deallocating space.
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*/
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gifHead->ImageCount = ImageCount;
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gifHead->CommentCount = CommentCount;
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gifHead->ApplicationCount = ApplicationCount;
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gifHead->PlainTextCount = PlainTextCount;
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/* putting stuff into the gif2mem structure */
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GifMemoryStruct.GifHeader = gifHead;
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GifMemoryStruct.GifImageDesc = gifImageDesc;
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GifMemoryStruct.GifPlainTextExtension = gifPlainText;
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GifMemoryStruct.GifApplicationExtension = gifApplication;
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GifMemoryStruct.GifCommentExtension = gifComment;
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GifMemoryStruct.GifGraphicControlExtension = gifGraphicControl;
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/* return the struct */
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return GifMemoryStruct;
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case 0x2C: /* Image Descriptor */
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/*
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* If there was no image descriptor before this increase image
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* count. If an imagedescriptor was present, reset GCEflag
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*/
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if (GCEflag == 0)
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ImageCount++;
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else
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GCEflag = 0;
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if (ImageCount > ImageArray) {
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aTemp = ImageArray;
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ImageArray = (ImageArray << 1) + 1;
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if (!(gifImageDesc = (GIFIMAGEDESC **)realloc(gifImageDesc,
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sizeof(GIFIMAGEDESC *) * ImageArray))) {
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printf("Out of memory!");
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exit(-1);
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}
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if (!(gifGraphicControl = (GIFGRAPHICCONTROL **)realloc(
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gifGraphicControl,
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sizeof(GIFGRAPHICCONTROL *) * ImageArray))) {
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printf("Out of memory!");
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exit(-1);
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}
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for (j = aTemp ; j < ImageArray ; j++) {
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gifGraphicControl[j] = NULL;
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gifImageDesc[j] = NULL;
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}
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}
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if(!(gifImageDesc[ImageCount-1] = (GIFIMAGEDESC*)malloc(sizeof(GIFIMAGEDESC)))) {
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printf("Out of memory!");
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exit(-1);
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}
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if (ReadGifImageDesc(gifImageDesc[ImageCount-1], &MemGif) == -1)
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fputs("Error reading Image Descriptor information\n", stderr);
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/* Decompress the Image */
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gifImageDesc[ImageCount-1]->Image = Decompress(gifImageDesc[ImageCount-1],
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gifHead);
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free(gifImageDesc[ImageCount-1]->GIFImage);
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/*
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* Convert the local palette into an HDF compatible palette In
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* case the local color table is present, it is written out as
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* the HDFPalette If it is absent the global table is written
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* as the HDFPalette.
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*/
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if (!((gifImageDesc[ImageCount-1]->PackedField) & 0x80)) {
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/* Check to see if the global color table exists.... */
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if (gifHead->PackedField & 0x80) {
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for (i=0 ; i<gifHead->TableSize ; i++) {
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gifImageDesc[ImageCount-1]->HDFPalette[i][0] =
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gifHead->HDFPalette[i][0];
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gifImageDesc[ImageCount-1]->HDFPalette[i][1] =
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gifHead->HDFPalette[i][1];
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gifImageDesc[ImageCount-1]->HDFPalette[i][2] =
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gifHead->HDFPalette[i][2];
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}
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}
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gifImageDesc[ImageCount-1]->TableSize = gifHead->TableSize;
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}
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break;
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case 0x21: /* Extension Block */
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Label = *MemGif++;
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switch (Label) {
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case 0x01: /* Plain Text Extension */
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puts("Plain Text Extension\n");
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PlainTextCount++;
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if (PlainTextCount > PlainTextArray)
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PlainTextArray = (PlainTextArray << 1) + 1;
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if (!(gifPlainText = (GIFPLAINTEXT **)realloc(gifPlainText , sizeof(GIFPLAINTEXT *) * PlainTextArray))) {
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printf("Out of memory!");
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exit(-1);
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}
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if(!(gifPlainText[PlainTextCount - 1] = (GIFPLAINTEXT*)malloc(sizeof(GIFPLAINTEXT)))) {
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printf("Out of memory!");
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exit(-1);
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}
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if (ReadGifPlainText(gifPlainText[PlainTextCount - 1], &MemGif))
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fprintf(stderr,
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"Error reading Plain Text Extension information.\n");
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break;
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case 0xFE: /* Comment Extension */
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CommentCount++;
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if (CommentCount > CommentArray)
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CommentArray = (CommentArray << 1) + 1;
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if (!(gifComment = (GIFCOMMENT **)realloc(gifComment , sizeof(GIFCOMMENT *) * CommentArray))) {
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printf("Out of memory!");
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exit(-1);
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}
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if(!(gifComment[CommentCount - 1] = (GIFCOMMENT *)malloc(sizeof(GIFCOMMENT)))) {
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printf("Out of memory!");
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exit(-1);
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}
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if (ReadGifComment(gifComment[CommentCount - 1], &MemGif))
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fprintf(stderr,
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"Error reading Comment Extension information\n");
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break;
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case 0xF9: /* Graphic Control Extension */
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if (GCEflag == 0 )
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ImageCount++;
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GCEflag = 1;
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if (ImageCount > ImageArray) {
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aTemp = ImageArray;
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ImageArray = (ImageArray << 1) + 1;
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if (!(gifGraphicControl = (GIFGRAPHICCONTROL **)realloc(gifGraphicControl , sizeof(GIFGRAPHICCONTROL *) * ImageArray))) {
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printf("Out of memory!");
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exit(-1);
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}
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if (!(gifImageDesc = (GIFIMAGEDESC **)realloc(gifImageDesc , sizeof(GIFIMAGEDESC *) * ImageArray))) {
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printf("Out of memory!");
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exit(-1);
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}
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for (j = aTemp ; j < ImageArray ; j++) {
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gifGraphicControl[j] = NULL;
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gifImageDesc[j] = NULL;
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}
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}
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if(!(gifGraphicControl[ImageCount-1] = (GIFGRAPHICCONTROL*)malloc(sizeof(GIFGRAPHICCONTROL)))) {
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printf("Out of memory!");
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exit(-1);
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}
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if (ReadGifGraphicControl(gifGraphicControl[ImageCount-1], &MemGif))
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fprintf(stderr,
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"Error reading Graphic Control Extension information\n");
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if (!*MemGif++ == 0)
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fprintf(stderr,
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"Error reading Graphic Control Extension\n");
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break;
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case 0xFF: /* Application Extension */
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ApplicationCount++;
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if (ApplicationCount > ApplicationArray)
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ApplicationArray = (ApplicationArray << 1) + 1;
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if (!(gifApplication = (GIFAPPLICATION **)realloc(gifApplication , sizeof(GIFAPPLICATION *) * ApplicationArray))) {
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printf("Out of memory!");
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exit(-1);
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}
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if(!(gifApplication[ApplicationCount - 1] = (GIFAPPLICATION *)malloc(sizeof(GIFAPPLICATION)))) {
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printf("Out of memory!");
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exit(-1);
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}
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if (ReadGifApplication(gifApplication[ApplicationCount - 1], &MemGif))
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fprintf(stderr,
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"Error reading Application Extension information\n");
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break;
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default:
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printf("Unknown Extension Label: 0x%02x\n", Label);
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break;
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}
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break;
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default:
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fprintf(stderr,
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"Unknown Block Separator Character: 0x%02x\n", Identifier);
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}
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}
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}
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