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| #include <stdlib.h>
#include <stdio.h>
#include <string.h>
int readImage(image_desc *pDesc, char * fName)
{
FILE *fp;
targa_header *header;
long length;
uint8_t *buffer=NULL;
uint8_t *colourmap=NULL;
uint8_t *ptr;
fp = fopen (fName, "rb");
if (!fp)
{
fprintf (stderr, "error: couldn't open \"%s\"!\n",fName);
return NULL;
}
else printf("fichier ouvert\n");
fseek(fp,0,SEEK_END);
length=ftell(fp);
fseek(fp,0,SEEK_SET);
buffer=(uint8_t*)malloc(sizeof(uint8_t)*length);
if (!buffer)
{
printf(stderr,"Error: memory allocation failed");
fclose(fp);
return NULL;
}
fread(buffer,1,length,fp);
fclose(fp);
printf("length: %d\n",length);
ptr=buffer;
header=(struct targa_header*)ptr;
ptr+=sizeof(targa_header);
pDesc=(struct targa_header*)malloc(sizeof(targa_header));
ptr+=header->idlength;
pDesc->pRed=(uint8_t*)malloc(sizeof(uint8_t)*pDesc->width*pDesc->height);
pDesc->pBlue=(uint8_t*)malloc(sizeof(uint8_t)*pDesc->width*pDesc->height);
pDesc->pGreen=(uint8_t*)malloc(sizeof(uint8_t)*pDesc->width*pDesc->height);
if(header->colourmaptype)
{
colourmap=ptr;
}
int i;
uint8_t colour;
for(i=0;i<pDesc->width*pDesc->height;++i)
{
colour=ptr[i];
pDesc->pRed[(i*3)]=colourmap[(colour*3)+0];
pDesc->pBlue[(i*3)]=colourmap[(colour*3)+1];
pDesc->pGreen[(i*3)]=colourmap[(colour*3)+2];
printf("pDesc->pRed[%d]: %d\n",i,pDesc->pRed[i]);
}
printf("%d\n",pDesc->width);
fclose (fp);
return pDesc;
}
int main()
{
image_desc *pDesc;
char * fName;
fName="image.tga";
readImage(&pDesc,fName);
} |
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