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<!--
Copyright (c) 2019 The Khronos Group Inc.
Use of this source code is governed by an MIT-style license that can be
found in the LICENSE.txt file.
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>WebGL OVR_multiview2 Conformance Tests</title>
<link rel="stylesheet" href="../../resources/js-test-style.css"/>
<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>
</head>
<body>
<div id="description"></div>
<div id="console"></div>
<script>
"use strict";
let wtu = WebGLTestUtils;
let gl = wtu.create3DContext(null, null, 2);
let ext = null;
function runDrawBuffersClearTest()
{
debug("");
debug("Testing that calling clear() clears all views in all draw buffers");
let width = 256;
let height = 256;
let views = gl.getParameter(ext.MAX_VIEWS_OVR);
let fb = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
let colorTex = [null, null, null];
let drawBuffers = [0, 0, 0];
for (let texIndex = 0; texIndex < colorTex.length; ++texIndex) {
colorTex[texIndex] = createTextureWithNearestFiltering(gl.TEXTURE_2D_ARRAY);
gl.texStorage3D(gl.TEXTURE_2D_ARRAY, 1, gl.RGBA8, width, height, views);
ext.framebufferTextureMultiviewOVR(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0 + texIndex, colorTex[texIndex], 0, 0, views);
drawBuffers[texIndex] = gl.COLOR_ATTACHMENT0 + texIndex;
}
gl.viewport(0, 0, width, height);
gl.drawBuffers(drawBuffers);
gl.clearColor(0, 1, 1, 1);
gl.clear(gl.COLOR_BUFFER_BIT);
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors from clear");
let readFb = gl.createFramebuffer();
gl.bindFramebuffer(gl.READ_FRAMEBUFFER, readFb);
for (let texIndex = 0; texIndex < colorTex.length; ++texIndex) {
for (let viewIndex = 0; viewIndex < views; ++viewIndex) {
gl.framebufferTextureLayer(gl.READ_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, colorTex[texIndex], 0, viewIndex);
let expectedColor = [0, 255, 255, 255];
wtu.checkCanvasRect(gl, 0, 0, width, height, expectedColor, 'view ' + viewIndex + ' of color attachment ' + texIndex + ' should be cyan');
}
debug("");
}
}
function runDrawBuffersRenderTest()
{
debug("");
debug("Testing rendering into multiple draw buffers with a different transformation matrix chosen from a uniform array according to ViewID");
let width = 256;
let height = 256;
let views = gl.getParameter(ext.MAX_VIEWS_OVR);
let fb = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
let colorTex = [null, null, null];
let drawBuffers = [0, 0, 0];
for (let texIndex = 0; texIndex < colorTex.length; ++texIndex) {
colorTex[texIndex] = createTextureWithNearestFiltering(gl.TEXTURE_2D_ARRAY);
gl.texStorage3D(gl.TEXTURE_2D_ARRAY, 1, gl.RGBA8, width, height, views);
ext.framebufferTextureMultiviewOVR(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0 + texIndex, colorTex[texIndex], 0, 0, views);
drawBuffers[texIndex] = gl.COLOR_ATTACHMENT0 + texIndex;
}
let multiviewShaders = [
getMultiviewRealisticUseCaseVertexShader(views),
getMultiviewColorFragmentShaderForDrawBuffers(colorTex.length)
];
let testProgram = wtu.setupProgram(gl, multiviewShaders, ['a_position'], [0], true);
if (!testProgram) {
testFailed("Compilation with extension enabled failed.");
return;
}
gl.viewport(0, 0, width, height);
gl.drawBuffers(drawBuffers);
let transformLocation = gl.getUniformLocation(testProgram, 'transform');
let transformData = new Float32Array (views * 16);
for (let viewIndex = 0; viewIndex < views; ++viewIndex) {
let scaleX = 1.0 / views;
// offsetX is the position of the left edge of the quad we want to get in normalized device coordinates
let offsetX = viewIndex / views * 2.0 - 1.0;
setupTranslateAndScaleXMatrix(transformData, viewIndex * 16, scaleX, offsetX);
}
gl.uniformMatrix4fv(transformLocation, false, transformData);
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 texIndex = 0; texIndex < colorTex.length; ++texIndex) {
for (let viewIndex = 0; viewIndex < views; ++viewIndex) {
gl.framebufferTextureLayer(gl.READ_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, colorTex[texIndex], 0, viewIndex);
let expectedColor = getExpectedColor(viewIndex + texIndex);
checkVerticalStrip(width, height, views, viewIndex, expectedColor, 'view ' + viewIndex + ' of color attachment ' + texIndex);
}
debug("");
}
}
description("This test verifies the functionality of the OVR_multiview2 extension when used with multiple draw buffers, 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');
runDrawBuffersClearTest();
wtu.setupUnitQuad(gl, 0, 1);
runDrawBuffersRenderTest();
}
}
debug("");
var successfullyParsed = true;
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