tests/tests/view/src/android/view/cts/surfacevalidator/PixelCounter.rs

/*
 * Copyright (C) 2016 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#pragma version(1)
#pragma rs java_package_name(android.view.cts.surfacevalidator)

int WIDTH;
uchar THRESHOLD;

rs_allocation image;

void countBlackishPixels(const int32_t *v_in, int *v_out){
    int y = v_in[0];
    v_out[0] = 0;

    for(int i = 0 ; i < WIDTH; i++){
        uchar4 pixel = rsGetElementAt_uchar4(image, i, y);
        if (pixel.r < THRESHOLD
                && pixel.g < THRESHOLD
                && pixel.b < THRESHOLD) {
            v_out[0]++;
        }
    }
}