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-rw-r--r-- | dom/canvas/test/webgl-conf/checkout/conformance/buffers/buffer-uninitialized.html | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/buffers/buffer-uninitialized.html b/dom/canvas/test/webgl-conf/checkout/conformance/buffers/buffer-uninitialized.html new file mode 100644 index 0000000000..75282f3674 --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/buffers/buffer-uninitialized.html @@ -0,0 +1,104 @@ +<!-- +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. +--> +<!DOCTYPE html> +<html> +<head> +<meta charset="utf-8"> +<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> +</head> +<body> +<div id="description"></div> +<div id="console"></div> + +<canvas id="canvas" width="1" height="1"></canvas> + +<script id="vshader" type="x-shader/x-vertex"> +attribute float a_vertex; +void main() +{ + gl_Position = a_vertex == 0.0 ? vec4(9, 9, 9, 1) : vec4(0.5, 0.5, 0.5, 1); +} +</script> + +<script id="fshader" type="x-shader/x-fragment"> +void main() +{ + gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0); +} +</script> + +<script> +"use strict"; +description("Tests that uninitialized WebGLBuffers are zeroed out"); + +var wtu = WebGLTestUtils; +var gl = wtu.create3DContext(document.getElementById("canvas")); +var program = wtu.setupProgram(gl, ["vshader", "fshader"], ["a_vertex"]); +shouldBeTrue("program != null"); + +var TEST_LENGTH = 1024; +var TEST_BUFSIZE = TEST_LENGTH * 4; +var data = new Float32Array(TEST_LENGTH / 4); // this array is zeroed + +var indices = new Uint16Array(TEST_LENGTH); +for (var i = 0; i < TEST_LENGTH; i++) { + indices[i] = i; +} + +gl.clearColor(0, 1, 0, 1); + +function test(initFunction) { + var uninitializedBuffer = gl.createBuffer(); + gl.bindBuffer(gl.ARRAY_BUFFER, uninitializedBuffer); + initFunction(); + + var elements = gl.createBuffer(); + gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, elements); + gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, indices, gl.STATIC_DRAW); + + gl.useProgram(program); + var vertexLoc = gl.getAttribLocation(program, "a_vertex"); + gl.vertexAttribPointer(vertexLoc, 1, gl.FLOAT, gl.FALSE, 0, 0); + gl.enableVertexAttribArray(vertexLoc); + + wtu.glErrorShouldBe(gl, gl.NO_ERROR, "no error should result from setup"); + + gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); + gl.drawElements(gl.POINTS, TEST_LENGTH, gl.UNSIGNED_SHORT, 0); + wtu.checkCanvasRect(gl, 0, 0, 1, 1, [0, 255, 0, 255], "buffer should be initialized to zero"); + + gl.deleteBuffer(uninitializedBuffer); +} + +var REPETITIONS = 50; + +var j; +debug(""); +debug("testing bufferData(..., size, ...)"); +for (j = 0; j < REPETITIONS; j++) { + test(function() { + gl.bufferData(gl.ARRAY_BUFFER, TEST_BUFSIZE, gl.STATIC_DRAW); + }); +} + +debug(""); +debug("testing bufferSubData(..., offset, data) of uninitialized buffer"); +for (j = 0; j < REPETITIONS; j++) { + test(function() { + gl.bufferData(gl.ARRAY_BUFFER, TEST_BUFSIZE, gl.STATIC_DRAW); + // bufferSubData the second quarter of the buffer + gl.bufferSubData(gl.ARRAY_BUFFER, TEST_BUFSIZE / 4, data); + }); +} + +var successfullyParsed = true; +</script> + +<script src="../../js/js-test-post.js"></script> +</body> +</html> |