dla danej bitmapy i maski:
najpierw utworzyć tymczasowy bitmapę:
bitmap = BitmapFactory.decodeResource(ctx.getResources(), R.drawable.bitmap);
mask = BitmapFactory.decodeResource(ctx.getResources(), R.drawable.mask);
float[] src = {
0, 0, 0, 0, 255,
0, 0, 0, 0, 255,
0, 0, 0, 0, 255,
1, 1, 1, -1, 0,
};
ColorMatrix cm = new ColorMatrix(src);
ColorMatrixColorFilter filter = new ColorMatrixColorFilter(cm);
maskPaint = new Paint();
maskPaint.setColorFilter(filter);
maskPaint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));
filteredBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888);
Canvas c = new Canvas(filteredBitmap);
c.drawBitmap(bitmap, 0, 0, null);
c.drawBitmap(mask, 0, 0, maskPaint);
colorFilterPaint = new Paint();
colorFilterPaint.setColorFilter(new LightingColorFilter(0xffffff, 0x880000));
i wyciągnąć go (I skalowane go, ponieważ mój emulator skalowane w dół):
@Override
public void draw(Canvas canvas) {
canvas.save();
canvas.scale(3, 3);
canvas.drawBitmap(bitmap, 0, 0, null);
canvas.drawBitmap(filteredBitmap, 0, 0, colorFilterPaint);
canvas.restore();
}
a wynik jest: