Mosaic RenderScript

gistfile1.txt

#pragma version(1)
#pragma rs java_package_name(com.uievolution.vehicleinfo.android.util)
#pragma rs_fp_relaxed

rs_allocation pixels;
int dotSize;

void init() {

}

/*
 * RenderScript kernel that performs mosaic manipulation.
 */
uchar4 __attribute__((kernel)) mosaic(uint32_t x, uint32_t y) {

    //rsDebug("x: %d y: %d", x, y);
    int px = (x / dotSize) * dotSize;
    int py = (y / dotSize) * dotSize;
    int square = dotSize * dotSize;

    int4 avg = {0, 0, 0, 255};

    for (int k = 0; k < dotSize; k++) {
        for (int l = 0; l < dotSize; l++) {
            uchar4 color = *(uchar4*)rsGetElementAt(pixels, px + k, py + l);
            avg.r += color.r;
            avg.g += color.g;
            avg.b += color.b;
        }
    }

    uchar4 out = {0, 0, 0, 255};
    out.r = avg.r / square;
    out.g = avg.g / square;
    out.b = avg.b / square;

    return out;
}