ovr_multiview2_flat_varying.html

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<title>WebGL OVR_multiview2 Conformance Tests</title>

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<script src="../../js/js-test-pre.js"></script>

<script src="../../js/webgl-test-utils.js"></script>

<script src="../../js/tests/ovr_multiview2_util.js"></script>

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<script>

"use strict";

let wtu = WebGLTestUtils;

let gl = wtu.create3DContext(null, null, 2);

let ext = null;

function runFlatVaryingTest()

    debug("");

    debug("Testing rendering with different colors in fragment shader");

    let width = 256;

    let height = 256;

    let views = gl.getParameter(ext.MAX_VIEWS_OVR);

    let multiviewShaders = [

      getMultiviewFlatVaryingVertexShader(views),

      getMultiviewFlatVaryingFragmentShader()

];

    let testProgram = wtu.setupProgram(gl, multiviewShaders, ['a_position'], [0], true);

    if (!testProgram) {

        testFailed("Compilation with extension enabled failed.");

        return;

    let fb = gl.createFramebuffer();

    gl.bindFramebuffer(gl.FRAMEBUFFER, fb);

    let colorTex = createTextureWithNearestFiltering(gl.TEXTURE_2D_ARRAY);

    gl.texStorage3D(gl.TEXTURE_2D_ARRAY, 1, gl.RGBA8, width, height, views);

    ext.framebufferTextureMultiviewOVR(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, colorTex, 0, 0, views);

    gl.viewport(0, 0, width, height);

    wtu.drawUnitQuad(gl);

    wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors from draw");

    let readFb = gl.createFramebuffer();

    gl.bindFramebuffer(gl.READ_FRAMEBUFFER, readFb);

    for (let viewIndex = 0; viewIndex < views; ++viewIndex) {

        gl.framebufferTextureLayer(gl.READ_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, colorTex, 0, viewIndex);

        let expectedColor = getExpectedColor(viewIndex);

        wtu.checkCanvasRect(gl, 0, 0, width, height, expectedColor, 'view ' + viewIndex + ' should be colored ' + expectedColor);

description("This test verifies that flat varyings work in multiview shaders using OVR_multiview2 extension, if it is available.");

debug("");

if (!gl) {

  testFailed("WebGL context does not exist");

} else {

  testPassed("WebGL context exists");

  if (!gl.getExtension("OVR_multiview2")) {

      testPassed("No OVR_multiview2 support -- this is legal");

  } else {

      testPassed("Successfully enabled OVR_multiview2 extension");

      ext = gl.getExtension('OVR_multiview2');

      wtu.setupUnitQuad(gl, 0, 1);

      runFlatVaryingTest();

debug("");

var successfullyParsed = true;

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