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#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
void CreateTGA( char *filename, short width, short height, void *image ) {
// create file pointer to write to
FILE *tga = NULL;
// write filename from func arg to buffer
char buffer[256];
if( filename ) {
strncpy( buffer, filename, sizeof(buffer) );
}
// if no filename is provided, set default
else {
strcpy( buffer, "img.tga" );
}
// open the named file for binary writing
tga = fopen( buffer, "wb" );
// set 'id length' field of tga header
fputc( 0, tga );
// set 'color map type' field of tga header
fputc( 1, tga ); // color map present
// set 'image type' field of tga header
fputc( 1, tga ); // uncompressed color mapped image
// set 'color map specification' field of tga header
fputc( 0, tga ); fputc( 0, tga ); // 2 byte 'first entry index' subfield, index 0
fputc( 2, tga ); fputc( 0, tga ); // 2 byte 'color map length' subfield, 2 entries
fputc( 24, tga ); // 'color map entry size' subfield, 24-bit color
// set 'image specification' field of tga header
fputc( 0, tga ); fputc( 0, tga ); // 2 byte 'x-origin' subfield, origin 0
fputc( 0, tga ); fputc( 0, tga ); // 2 byte 'y-origin' subfield, origin 0
fputc( width & 0xff, tga ); fputc( width >> 8, tga ); // 2 byte 'width' subfield, set by function argument 'w'
fputc( height & 0xff, tga ); fputc( height >> 8, tga ); // 2 byte 'height' subfield, set by function argument 'h'
fputc( 8, tga ); // 'pixel depth' subfield, 8 bits per pixel
fputc( 0x20, tga ); // 'image descriptor' subfield, bit 5 set, indicating top-to-bottom, left-to-right order
// set 'image and color map data' field
fputc( 0xff, tga ); fputc( 0xff, tga ); fputc( 0xff, tga ); // set first color map entry, 0xffffff
fputc( 0x00, tga ); fputc( 0x00, tga ); fputc( 0x00, tga ); // set second color map entry, 0x000000
// write image data
fwrite( image, 1, (width * height), tga );
fclose( tga );
}
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