ppm_rendering.txt

void 
renderer_output_ppm(renderer_t * renderer, const char * filename){
	unsigned int colcnt=0, bi=0, samplestart;
	int i, j, imgW = renderer->imgWidth, imgH = renderer->imgHeight;
    FILE *fp = fopen(filename, "wb"); /* b - binary mode */
    (void) fprintf(fp, "P6\n%d %d\n255\n", imgW, imgH);
	cRGB_t fc;
	unsigned char color[3*imgW*imgH];
    for (j = 0; j < imgH; ++j){
	  bi = j * renderer->bufWidth;
	  for (i = 0; i < imgW; ++i){
		fc.r = 0.f, fc.g = 0.f, fc.b = 0.f;
		samplestart = bi + (i*renderer->used_samples);
		for (unsigned int sample = renderer->used_samples; sample--;){
			cRGB_t * c = &renderer->frameBuffer[samplestart + sample];
			//crgb_crgb_add(&fc, c);
			fc.r += c->r;
			fc.g += c->g;
			fc.b += c->b;
		}
	 
		color[colcnt++] = (unsigned char)(fc.r * 255.f);
		color[colcnt++] = (unsigned char)(fc.g * 255.f);
		color[colcnt++] = (unsigned char)(fc.b * 255.f);
	  }
    }
	(void) fwrite(color, 1, 3*imgW*imgH, fp);
    (void) fclose(fp);
}