Optimizations and cleanups

(missing float conversion, defines, 1.0 vs 1.f etc.)

rtengine/rawimage.cc

@@ -229,10 +229,12 @@ unsigned short** RawImage::compress_image()
 
     // copy pixel raw data: the compressed format earns space
 	if (filters != 0) {
+        #pragma omp parallel for
 		for (int row = 0; row < height; row++)
 			for (int col = 0; col < width; col++)
 				this->data[row][col] = image[row * width + col][FC(row, col)];
 	} else {
+        #pragma omp parallel for
 		for (int row = 0; row < height; row++)
 			for (int col = 0; col < width; col++) {
 				this->data[row][3 * col + 0] = image[row * width + col][0];