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+/*
+** Copyright (c) 2013 The Khronos Group Inc.
+**
+** Permission is hereby granted, free of charge, to any person obtaining a
+** copy of this software and/or associated documentation files (the
+** "Materials"), to deal in the Materials without restriction, including
+** without limitation the rights to use, copy, modify, merge, publish,
+** distribute, sublicense, and/or sell copies of the Materials, and to
+** permit persons to whom the Materials are furnished to do so, subject to
+** the following conditions:
+**
+** The above copyright notice and this permission notice shall be included
+** in all copies or substantial portions of the Materials.
+**
+** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
+*/
+IterableTest = (function() {
+
+ var wtu = WebGLTestUtils;
+
+ function run(test, iterations) {
+ var target = iterations || 10;
+ var count = 0;
+
+ function doNextTest() {
+ ++count;
+ debug("Test " + count + " of " + target);
+ var success = test();
+ if (count < target && success !== false) {
+ wtu.waitForComposite(doNextTest);
+ //setTimeout(doNextTest, 100);
+ } else {
+ finishTest();
+ }
+ }
+
+ doNextTest();
+ }
+
+ // Creates a canvas and a texture then exits. There are
+ // no references to either so both should be garbage collected.
+ function createContextCreationAndDestructionTest() {
+ var textureSize = null;
+
+ return function() {
+ var canvas = document.createElement("canvas");
+ // This is safe for any device. See drawingBufferWidth in spec.
+ canvas.width = 2048;
+ canvas.height = 2048;
+ var gl = wtu.create3DContext(canvas);
+ if (textureSize === null) {
+ var maxTextureSize = gl.getParameter(gl.MAX_TEXTURE_SIZE);
+ textureSize = Math.min(1024, maxTextureSize);
+ }
+ var tex = gl.createTexture();
+ gl.bindTexture(gl.TEXTURE_2D, tex);
+ gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, textureSize, textureSize, 0, gl.RGBA, gl.UNSIGNED_BYTE,
+ null);
+ gl.clear(gl.COLOR_BUFFER_BIT);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors");
+
+ return true;
+ };
+ }
+
+ // Creates many small canvases and attaches them to the DOM.
+ // This tests an edge case discovered in Chrome where the creation of multiple
+ // WebGL contexts would eventually lead to context creation failure.
+ // (crbug.com/319265) The test does not require that old contexts remain
+ // valid, only that new ones can be created.
+ function createContextCreationTest() {
+ return function() {
+ var canvas = document.createElement("canvas");
+ canvas.width = 1;
+ canvas.height = 1;
+
+ document.body.appendChild(canvas);
+
+ var gl = wtu.create3DContext(canvas);
+ if (!gl) {
+ return false;
+ }
+
+ gl.clear(gl.COLOR_BUFFER_BIT);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors");
+
+ return true;
+ };
+ }
+
+ // Draws rectangle on a passed canvas with preserveDrawingBuffer
+ // and antialiasing ON, tests rect color on every iteration.
+ function createMultisampleCorruptionTest(gl) {
+ var lastContext = null;
+ // Allocate a read back buffer in advance and reuse it for all iterations
+ // to avoid memory issues because of late garbage collection.
+ var readBackBuf = new Uint8Array(gl.canvas.width * gl.canvas.height * 4);
+
+ var program = wtu.loadStandardProgram(gl);
+ var uniforms = wtu.getUniformMap(gl, program);
+ gl.useProgram(program);
+
+ gl.clearColor(1.0, 0.0, 0.0, 1.0);
+ gl.clear(gl.COLOR_BUFFER_BIT);
+
+ var vertexObject = gl.createBuffer();
+ gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
+ gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ 0,2.5,0, 1.5,1.5,0, 2.5,1.5,0 ]), gl.STATIC_DRAW);
+ gl.enableVertexAttribArray(0);
+ gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);
+ gl.vertexAttrib3f(1, 0.0, 0.0, 1.0);
+
+ var identityMat = new Float32Array([
+ 1, 0, 0, 0,
+ 0, 1, 0, 0,
+ 0, 0, 1, 0,
+ 0, 0, 0, 1
+ ]);
+
+ gl.uniformMatrix4fv(uniforms.u_modelViewProjMatrix.location, false, identityMat);
+
+ function test() {
+ var gl2 = wtu.create3DContext(null, {antialias: true});
+
+ gl2.canvas.width = gl2.canvas.height = 1024;
+ gl2.canvas.style.width = gl2.canvas.style.height = "1px";
+ document.body.appendChild(gl2.canvas);
+
+ gl2.clearColor(1.0, 0.0, 0.0, 1.0);
+ gl2.clear(gl2.COLOR_BUFFER_BIT);
+
+ if(lastContext) {
+ gl.drawArrays(gl.TRIANGLES, 0, 3);
+ var msg = "Canvas should be red";
+ wtu.checkCanvasRectColor(gl,
+ 0, 0, gl.canvas.width, gl.canvas.height,
+ [255, 0, 0, 255], null,
+ function() {
+ testPassed(msg);
+ },
+ function() {
+ testFailed(msg);
+ return false;
+ },
+ debug, readBackBuf);
+ document.body.removeChild(lastContext.canvas);
+ }
+
+ lastContext = gl2;
+ return true;
+ };
+
+ // First pass does initialization
+ test();
+
+ return test;
+ }
+
+ return {
+ run: run,
+
+ createContextCreationAndDestructionTest: createContextCreationAndDestructionTest,
+ createContextCreationTest: createContextCreationTest,
+ createMultisampleCorruptionTest: createMultisampleCorruptionTest
+ };
+
+})();