diff options
Diffstat (limited to 'tools/gifconv/gif2mem.c')
| -rw-r--r-- | tools/gifconv/gif2mem.c | 572 |
1 files changed, 281 insertions, 291 deletions
diff --git a/tools/gifconv/gif2mem.c b/tools/gifconv/gif2mem.c index 830eba7..dd103c4 100644 --- a/tools/gifconv/gif2mem.c +++ b/tools/gifconv/gif2mem.c @@ -1,10 +1,11 @@ /* -** 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 -*/ - - + * Copyright (C) 2001 National Center for Supercomputing Applications + * All rights reserved. + * + * 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 ** @@ -21,20 +22,18 @@ ** Copyright (C) 1991-92 by Graphics Software Labs. All rights reserved. ** \****************************************************************************/ #include <stdio.h> + #include "gif.h" -/* #include <hdf.h> */ #define VERSION "1.00" GIFTOMEM -Gif2Mem(MemGif) -BYTE *MemGif; +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 - */ + /* + * 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 */ @@ -42,302 +41,293 @@ BYTE *MemGif; GIFCOMMENT **gifComment; /* Comment Extension structure */ GIFGRAPHICCONTROL **gifGraphicControl; /* Graphic Control Extension strct */ - GIFTOMEM GifMemoryStruct; - - + 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); + 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 (;;) - { + * 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; + 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); + fprintf(stderr, + "Unknown Block Separator Character: 0x%02x\n", Identifier); } - } - - + } } |