michael@0: /* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko.gfx;
michael@0: 
michael@0: import android.graphics.Bitmap;
michael@0: 
michael@0: /**
michael@0:  * Utility methods useful when displaying Cairo bitmaps using OpenGL ES.
michael@0:  */
michael@0: public class CairoUtils {
michael@0:     private CairoUtils() { /* Don't call me. */ }
michael@0: 
michael@0:     public static int bitsPerPixelForCairoFormat(int cairoFormat) {
michael@0:         switch (cairoFormat) {
michael@0:         case CairoImage.FORMAT_A1:          return 1;
michael@0:         case CairoImage.FORMAT_A8:          return 8;
michael@0:         case CairoImage.FORMAT_RGB16_565:   return 16;
michael@0:         case CairoImage.FORMAT_RGB24:       return 24;
michael@0:         case CairoImage.FORMAT_ARGB32:      return 32;
michael@0:         default:
michael@0:             throw new RuntimeException("Unknown Cairo format");
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     public static int bitmapConfigToCairoFormat(Bitmap.Config config) {
michael@0:         if (config == null)
michael@0:             return CairoImage.FORMAT_ARGB32;    /* Droid Pro fix. */
michael@0: 
michael@0:         switch (config) {
michael@0:         case ALPHA_8:   return CairoImage.FORMAT_A8;
michael@0:         case ARGB_4444: throw new RuntimeException("ARGB_444 unsupported");
michael@0:         case ARGB_8888: return CairoImage.FORMAT_ARGB32;
michael@0:         case RGB_565:   return CairoImage.FORMAT_RGB16_565;
michael@0:         default:        throw new RuntimeException("Unknown Skia bitmap config");
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     public static Bitmap.Config cairoFormatTobitmapConfig(int format) {
michael@0:         switch (format) {
michael@0:         case CairoImage.FORMAT_A8:        return Bitmap.Config.ALPHA_8;
michael@0:         case CairoImage.FORMAT_ARGB32:    return Bitmap.Config.ARGB_8888;
michael@0:         case CairoImage.FORMAT_RGB16_565: return Bitmap.Config.RGB_565;
michael@0:         default:
michael@0:             throw new RuntimeException("Unknown CairoImage format");
michael@0:         }
michael@0:     }
michael@0: }
michael@0: