private void initRendering(int mode) {
Paint paint = new Paint();
switch (mode) {
case 0:
{ // Default
paint.setColorFilter(null);
break;
}
case 1:
{ // Grayscale
ColorMatrix matrix = new ColorMatrix();
matrix.setSaturation(0);
ColorMatrixColorFilter filter = new ColorMatrixColorFilter(matrix);
paint.setColorFilter(filter);
break;
}
case 2:
{ // Inverted
ColorMatrixColorFilter filter = new ColorMatrixColorFilter(NEGATIVE_COLOR);
paint.setColorFilter(filter);
break;
}
case 3:
{ // Inverted grayscale
ColorMatrix matrix = new ColorMatrix();
matrix.set(NEGATIVE_COLOR);
ColorMatrix gcm = new ColorMatrix();
gcm.setSaturation(0);
ColorMatrix concat = new ColorMatrix();
concat.setConcat(matrix, gcm);
ColorMatrixColorFilter filter = new ColorMatrixColorFilter(concat);
paint.setColorFilter(filter);
break;
}
default:
{
paint.setColorFilter(null);
break;
}
}
// maybe sometime LAYER_TYPE_NONE would better?
setLayerType(View.LAYER_TYPE_HARDWARE, paint);
}
