private int colordodge(int in1, int in2) {
float image = (float)in2;
float mask = (float)in1;
return ((int) ((image == 255) ? image:Math.min(255, (((long)mask << 8 ) / (255 - image)))));
}
/**
* Blends 2 bitmaps to one and adds the color dodge blend mode to it.
*/
public Bitmap ColorDodgeBlend(Bitmap source, Bitmap layer) {
Bitmap base = source.copy(Config.ARGB_8888, true);
Bitmap blend = layer.copy(Config.ARGB_8888, false);
IntBuffer buffBase = IntBuffer.allocate(base.getWidth() * base.getHeight());
base.copyPixelsToBuffer(buffBase);
buffBase.rewind();
IntBuffer buffBlend = IntBuffer.allocate(blend.getWidth() * blend.getHeight());
blend.copyPixelsToBuffer(buffBlend);
buffBlend.rewind();
IntBuffer buffOut = IntBuffer.allocate(base.getWidth() * base.getHeight());
buffOut.rewind();
while (buffOut.position() < buffOut.limit()) {
int filterInt = buffBlend.get();
int srcInt = buffBase.get();
int redValueFilter = Color.red(filterInt);
int greenValueFilter = Color.green(filterInt);
int blueValueFilter = Color.blue(filterInt);
int redValueSrc = Color.red(srcInt);
int greenValueSrc = Color.green(srcInt);
int blueValueSrc = Color.blue(srcInt);
int redValueFinal = colordodge(redValueFilter, redValueSrc);
int greenValueFinal = colordodge(greenValueFilter, greenValueSrc);
int blueValueFinal = colordodge(blueValueFilter, blueValueSrc);
int pixel = Color.argb(255, redValueFinal, greenValueFinal, blueValueFinal);
buffOut.put(pixel);
}
buffOut.rewind();
base.copyPixelsFromBuffer(buffOut);
blend.recycle();
return base;
}