LayoutTests/webgl/webgl-image-rendering.html

<!--
    Tests that image-rendering behavior for WebGL canvas element is the same as
    for an image with the same contents.
    Left (canvas element) should be the same as right (image element).
 -->
<body>
    <style type=text/css>
    canvas {
        width: 64px;
        height: 64px;
        display: inline-block;
    }
    img {
        width: 64px;
        height: 64px;
        display: inline-block;
    }
    .pixelated canvas, .pixelated img {
        image-rendering: pixelated;
    }
    .crisp-edges canvas, .crisp-edges img {
        image-rendering: crisp-edges;
    }
    </style>
    <div class="pixelated">
        <canvas width="2" height="2""></canvas>
        <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAYAAABytg0kAAAAAXNSR0IArs4c6QAAAERlWElmTU0AKgAAAAgAAYdpAAQAAAABAAAAGgAAAAAAA6ABAAMAAAABAAEAAKACAAQAAAABAAAAAqADAAQAAAABAAAAAgAAAADtGLyqAAAADklEQVQIHWNg+A+EyAAAHfQB/5BEIGEAAAAASUVORK5CYII=">
    </div>
    <div class="to-be-pixelated">
        <canvas width="2" height="2""></canvas>
        <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAYAAABytg0kAAAAAXNSR0IArs4c6QAAAERlWElmTU0AKgAAAAgAAYdpAAQAAAABAAAAGgAAAAAAA6ABAAMAAAABAAEAAKACAAQAAAABAAAAAqADAAQAAAABAAAAAgAAAADtGLyqAAAADklEQVQIHWNg+A+EyAAAHfQB/5BEIGEAAAAASUVORK5CYII=">
    </div>
    <div class="pixelated delayed">
        <canvas width="2" height="2""></canvas>
        <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAYAAABytg0kAAAAAXNSR0IArs4c6QAAAERlWElmTU0AKgAAAAgAAYdpAAQAAAABAAAAGgAAAAAAA6ABAAMAAAABAAEAAKACAAQAAAABAAAAAqADAAQAAAABAAAAAgAAAADtGLyqAAAADklEQVQIHWNg+A+EyAAAHfQB/5BEIGEAAAAASUVORK5CYII=">
    </div>
    <div class="crisp-edges">
        <canvas width="2" height="2"></canvas>
        <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAYAAABytg0kAAAAAXNSR0IArs4c6QAAAERlWElmTU0AKgAAAAgAAYdpAAQAAAABAAAAGgAAAAAAA6ABAAMAAAABAAEAAKACAAQAAAABAAAAAqADAAQAAAABAAAAAgAAAADtGLyqAAAADklEQVQIHWNg+A+EyAAAHfQB/5BEIGEAAAAASUVORK5CYII=">
    </div>
    <div class="to-be-crisp-edges">
        <canvas width="2" height="2"></canvas>
        <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAYAAABytg0kAAAAAXNSR0IArs4c6QAAAERlWElmTU0AKgAAAAgAAYdpAAQAAAABAAAAGgAAAAAAA6ABAAMAAAABAAEAAKACAAQAAAABAAAAAqADAAQAAAABAAAAAgAAAADtGLyqAAAADklEQVQIHWNg+A+EyAAAHfQB/5BEIGEAAAAASUVORK5CYII=">
    </div>
    <div class="crisp-edges delayed">
        <canvas width="2" height="2"></canvas>
        <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAYAAABytg0kAAAAAXNSR0IArs4c6QAAAERlWElmTU0AKgAAAAgAAYdpAAQAAAABAAAAGgAAAAAAA6ABAAMAAAABAAEAAKACAAQAAAABAAAAAqADAAQAAAABAAAAAgAAAADtGLyqAAAADklEQVQIHWNg+A+EyAAAHfQB/5BEIGEAAAAASUVORK5CYII=">
    </div>
    <div>
        <canvas width="2" height="2"></canvas>
        <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAYAAABytg0kAAAAAXNSR0IArs4c6QAAAERlWElmTU0AKgAAAAgAAYdpAAQAAAABAAAAGgAAAAAAA6ABAAMAAAABAAEAAKACAAQAAAABAAAAAqADAAQAAAABAAAAAgAAAADtGLyqAAAADklEQVQIHWNg+A+EyAAAHfQB/5BEIGEAAAAASUVORK5CYII=">
    </div>
    <div class="to-be-cleared pixelated">
        <canvas width="2" height="2"></canvas>
        <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAYAAABytg0kAAAAAXNSR0IArs4c6QAAAERlWElmTU0AKgAAAAgAAYdpAAQAAAABAAAAGgAAAAAAA6ABAAMAAAABAAEAAKACAAQAAAABAAAAAqADAAQAAAABAAAAAgAAAADtGLyqAAAADklEQVQIHWNg+A+EyAAAHfQB/5BEIGEAAAAASUVORK5CYII=">
    </div>
    <div class="to-be-cleared crisp-edges">
        <canvas width="2" height="2"></canvas>
        <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAYAAABytg0kAAAAAXNSR0IArs4c6QAAAERlWElmTU0AKgAAAAgAAYdpAAQAAAABAAAAGgAAAAAAA6ABAAMAAAABAAEAAKACAAQAAAABAAAAAqADAAQAAAABAAAAAgAAAADtGLyqAAAADklEQVQIHWNg+A+EyAAAHfQB/5BEIGEAAAAASUVORK5CYII=">
    </div>

    <script>
    if (window.testRunner) {
        window.testRunner.dumpAsText(true);
        window.testRunner.waitUntilDone();
    }
    function clear(e) {
        const gl = e.getContext('webgl');
        gl.clearColor(0, 1, 0, 1);
        gl.enable(gl.SCISSOR_TEST);
        gl.scissor(0, 1, 1, 1);
        gl.clear(gl.COLOR_BUFFER_BIT);
    }
    [...document.querySelectorAll('canvas')].forEach((e) => {
        if (e.parentNode.className.includes("delayed"))
            return;
        clear(e);
    });

    [...document.querySelectorAll('.to-be-cleared')].forEach((e) => {
        e.className = ""
    });
    window.requestAnimationFrame(() => {
        [...document.querySelectorAll('.to-be-pixelated')].forEach((e) => {
            e.className = "pixelated"
        });
        [...document.querySelectorAll('.to-be-crisp-edges')].forEach((e) => {
            e.className = "crisp-edges"
        });
        [...document.querySelectorAll('div.delayed > canvas')].forEach((e) => {
            clear(e);
        });
        if (window.testRunner)
            window.testRunner.notifyDone();
    });
    </script>
</body>