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#include <stdio.h>
#include <stdlib.h>
typedef struct{
short type;
int size;
short reserved1;
short reserved2;
int offset;
} BMPHeader;
typedef struct{
int size;
int width;
int height;
short planes;
short bitsPerPixel;
unsigned compression;
unsigned imageSize;
int xPelsPerMeter;
int yPelsPerMeter;
int clrUsed;
int clrImportant;
} BMPInfoHeader;
void LoadBMPFile(unsigned char **dst, int *width, int *height, const char *name){
BMPHeader hdr;
BMPInfoHeader infoHdr;
int x, y;
FILE *fd;
printf("Chargement de %s...\n", name);
if( !(fd = fopen(name,"rb")) ){
printf("***BMP load error: file access denied***\n");
exit(0);
}
fread(&hdr, sizeof(hdr), 1, fd);
if(hdr.type != 0x4D42){
printf("***BMP load error: bad file format***\n");
exit(0);
}
fread(&infoHdr, sizeof(infoHdr), 1, fd);
if(infoHdr.bitsPerPixel != 24){
printf("***BMP load error: invalid color depth***\n");
exit(0);
}
if(infoHdr.compression){
printf("***BMP load error: compressed image***\n");
exit(0);
}
*width = infoHdr.width;
*height = infoHdr.height;
*dst = (unsigned char *)malloc(*width * *height * sizeof(unsigned char));
printf("Largeur : %u\n", infoHdr.width);
printf("Hauteur : %u\n", infoHdr.height);
fseek(fd, hdr.offset - sizeof(hdr) - sizeof(infoHdr), SEEK_CUR);
int r,g,b;
for(y = 0; y < *height; y++){
for(x = 0; x < infoHdr.width; x++){
(*dst)[(y * *width + x)].z =fgetc(fd); // composante bleue
(*dst)[(y * *width + x)].y=fgetc(fd); // composante verte
(*dst)[(y * *width + x)].x=fgetc(fd); // composante rouge
}
/* si la largeur de l'image n'est pas multiple de 4, des octets sont ajoutés à la fin de chaque ligne, on ne les ignore */
for(x = 0; x < (4 - (3 * infoHdr.width) % 4) % 4; x++)
fgetc(fd);
}
if(ferror(fd)){
printf("***Unknown BMP load error.***\n");
free(*dst);
exit(0);
}
else
printf("BMP file loaded successfully!\n");
fclose(fd);
} |
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