PhotoFilter.java 文件源码

@RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR1)
public Bitmap twelve(Context context, Bitmap bitmap){
    renderScript=RenderScript.create(context);
    outBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), bitmap.getConfig());
    inputAllocation=Allocation.createFromBitmap(renderScript,bitmap);
    outputAllocation=Allocation.createTyped(renderScript,inputAllocation.getType());
    final ScriptIntrinsicColorMatrix colorMatrix12 = ScriptIntrinsicColorMatrix.create(renderScript, Element.U8_4(renderScript));
    colorMatrix12.setColorMatrix(new android.renderscript.Matrix4f(new float[]
            {
                    .309f, .409f, .309f, 0f,
                    .609f, .309f, .409f, 0f,
                    0.42f, .42f, .2f, 0f,
                    0f, 0f, 0f, 1f


            }));
    colorMatrix12.forEach(inputAllocation, outputAllocation);
    outputAllocation.copyTo(outBitmap);
    return outBitmap;
}