Example #1
0
// Reads Tiff Images
RGBAImage* RGBAImage::ReadTiff(char *filename)
{
	RGBAImage *fimg = 0;
	
    TIFF* tif = TIFFOpen(filename, "r");
    char emsg[1024];
    if (tif) {
		TIFFRGBAImage img;
		
		if (TIFFRGBAImageBegin(&img, tif, 0, emsg)) {
			size_t npixels;
			uint32* raster;

			npixels = img.width * img.height;
			raster = (uint32*) _TIFFmalloc(npixels * sizeof (uint32));
			if (raster != NULL) {
				if (TIFFRGBAImageGet(&img, raster, img.width, img.height)) {
					// result is in ABGR
					fimg = new RGBAImage(img.width, img.height);
					for (int y = 0; y < img.height; y++) {
						for (int x = 0; x < img.width; x++) {
						   fimg->Set(x,y, raster[x + y * img.width]);
						}
					}
				}
			_TIFFfree(raster);
			}
	    }
	    TIFFRGBAImageEnd(&img);
	} else {
	    TIFFError(filename, emsg);
	}
	return fimg;
}
Example #2
0
	static RGBAImage *ReadFromFile(const string &filename)
	{
		cout << "reading from file:" << filename << "\n";
		vector<uint8_t> lodepng_image; //the raw pixels
		unsigned width, height;
		unsigned error = lodepng::decode(lodepng_image, width, height, filename.c_str());
		if (error) {
			cout << "decoder error " << error << ": " << lodepng_error_text(error) << endl;
			return NULL;
		}

		//the pixels are now in the vector "image", 4 bytes per pixel, 
		//ordered RGBARGBA..., use it as texture, draw it, ...
		cout << "width " << width << ", height " << height << "\n";

		RGBAImage *rgbaimg = new RGBAImage(width,height,filename);

		for(unsigned y = 0; y < height; y += 1) {
		for(unsigned x = 0; x < width; x += 1) {
			uint32_t red = lodepng_image[4 * y * width + 4 * x + 0]; //red
			uint32_t green = lodepng_image[4 * y * width + 4 * x + 1]; //green
			uint32_t blue = lodepng_image[4 * y * width + 4 * x + 2]; //blue
			uint32_t alpha = lodepng_image[4 * y * width + 4 * x + 3]; //alpha
			rgbaimg->Set( red, green, blue, alpha, y*width+x );
		}
		}

		return rgbaimg;
	}