qt-everywhere-src-5.14.1/qtdeclarative/tests/auto/qmltest/pixel/tst_pixel.qml

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import QtQuick 2.0
import QtTest 1.1

Rectangle {
    id:rect
    width: 40
    height: 40
    color:"red"
    TestCase {
        name: "Pixels"
        when: windowShown

        function test_pixel() {
           skip("test_pixel() is unstable, QTBUG-27671")
           var img = grabImage(rect);
           compare(img.pixel(20, 20), Qt.rgba(255, 0, 0, 255));
           compare(img.red(1,1), 255);
           compare(img.green(1,1), 0);
           compare(img.blue(1,1), 0);
           compare(img.alpha(1,1), 255);

           fuzzyCompare(img.red(1,1), 254, 2);
           fuzzyCompare(img.pixel(1,1), Qt.rgba(254, 0, 0, 254), 2);
           fuzzyCompare(img.pixel(1,1), "#FF0201", 2);

           rect.color = "blue";
           waitForRendering(rect);
           img = grabImage(rect);
           compare(img.pixel(20, 20), Qt.rgba(0, 0, 255, 255));
           compare(img.red(1,1), 0);
           compare(img.green(1,1), 0);
           compare(img.blue(1,1), 255);
           compare(img.alpha(1,1), 255);
        }

    }
}