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50 lines
2 KiB
C
50 lines
2 KiB
C
/*
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FileHandler - General-purpose file handling library for Niotso
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read_tga.c - Copyright (c) 2012 Niotso Project <http://niotso.org/>
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Author(s): Fatbag <X-Fi6@phppoll.org>
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include "read_tga.h"
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#ifndef read_uint32
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#define read_uint32(x) (unsigned)(((x)[0]<<(8*0)) | ((x)[1]<<(8*1)) | ((x)[2]<<(8*2)) | ((x)[3]<<(8*3)))
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#define read_uint16(x) (unsigned)(((x)[0]<<(8*0)) | ((x)[1]<<(8*1)))
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#endif
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int tga_read_header(tgaheader_t * TGAHeader, const uint8_t * Buffer, size_t FileSize){
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unsigned padding;
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if(FileSize < ?) return 0;
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TGAHeader->IDLength = read_uint8(Buffer);
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TGAHeader->ColorMapType = read_uint8(Buffer+1);
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TGAHeader->ImageType = read_uint8(Buffer+2);
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/* Color map */
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TGAHeader->FirstEntry = read_uint16(Buffer+3);
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TGAHeader->ColorMapLength = read_uint16(Buffer+5);
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TGAHeader->EntrySize = read_uint8(Buffer+7);
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/* Image */
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TGAHeader->XOrigin = read_uint16(Buffer+8);
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TGAHeader->YOrigin = read_uint16(Buffer+10);
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TGAHeader->Width = read_uint16(Buffer+12);
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TGAHeader->Height = read_uint16(Buffer+14);
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TGAHeader->ImageDepth = read_uint8(Buffer+16);
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TGAHeader->Descriptor = read_uint8(Buffer+17);
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return 1;
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}
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