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Unified Diff: conformance/textures/gl-pixelstorei.html

Issue 8342021: Add webgl conformance tests r15841. (Closed) Base URL: svn://chrome-svn/chrome/trunk/deps/third_party/webgl/sdk/tests/
Patch Set: Created 9 years, 2 months ago
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Index: conformance/textures/gl-pixelstorei.html
===================================================================
--- conformance/textures/gl-pixelstorei.html (revision 0)
+++ conformance/textures/gl-pixelstorei.html (revision 0)
@@ -0,0 +1,125 @@
+<!--
+Copyright (c) 2011 The Chromium Authors. All rights reserved.
+Use of this source code is governed by a BSD-style license that can be
+found in the LICENSE file.
+-->
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>WebGL pixelStorei Test</title>
+<link rel="stylesheet" href="../../resources/js-test-style.css"/>
+<script src="../../resources/js-test-pre.js"></script>
+<script src="../resources/webgl-test.js"> </script>
+<script src="../../resources/desktop-gl-constants.js" type="text/javascript"></script>
+</head>
+<body>
+<canvas id="example" width="50" height="50"></canvas>
+<canvas id="2d00" width="50" height="50"></canvas>
+<canvas id="2d01" width="50" height="50"></canvas>
+<canvas id="2d02" width="50" height="50"></canvas>
+<canvas id="2d03" width="50" height="50"></canvas>
+<div id="description"></div>
+<div id="console"></div>
+<script id="vshader" type="x-shader/x-vertex">
+attribute vec4 vPosition;
+void main() {
+ gl_Position = vPosition;
+}
+</script>
+
+<script id="fshader" type="x-shader/x-fragment">
+void main() {
+ gl_FragColor = vec4(1.0,0.0,0.0,1.0);
+}
+</script>
+
+<script>
+function fail(x,y, name, buf, shouldBe) {
+ var i = (y*50+x) * 4;
+ var reason = "pixel in "+name+" at ("+x+","+y+") is ("+buf[i]+","+buf[i+1]+","+buf[i+2]+","+buf[i+3]+"), should be "+shouldBe;
+ testFailed(reason);
+}
+
+function pass(name) {
+ testPassed("drawing is correct in " + name);
+}
+
+function init() {
+ debug("There should be 5 red triangles on 5 black squares above");
+ debug("");
+
+ debug("This test checks that drawImage and readPixels are not effected by gl.Pixelstorei(gl.PACK_ALIGNMENT) and visa versa");
+ debug("");
+
+ var canvas3d = document.getElementById("example");
+ gl = initWebGL("example", "vshader", "fshader", [ "vPosition"], [ 0, 0, 0, 1 ], 1);
+
+ var vertexObject = gl.createBuffer();
+ gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
+ gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ 0,0.5,0, -0.5,-0.5,0, 0.5,-0.5,0 ]), gl.STATIC_DRAW);
+ gl.enableVertexAttribArray(0);
+ gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);
+
+ gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
+ gl.drawArrays(gl.TRIANGLES, 0, 3);
+
+
+ function checkData(buf, name) {
+ // Test several locations
+ // First line should be all black
+ for (var i = 0; i < 50; ++i) {
+ if (buf[i*4] != 0 || buf[i*4+1] != 0 || buf[i*4+2] != 0 || buf[i*4+3] != 255) {
+ fail(i, 0, name, buf, "(0,0,0,255)");
+ return;
+ }
+ }
+
+ // Line 25 should be red for at least 6 red pixels starting 22 pixels in
+ var offset = (25*50+22) * 4;
+ for (var i = 0; i < 6; ++i) {
+ if (buf[offset+i*4] != 255 || buf[offset+i*4+1] != 0 || buf[offset+i*4+2] != 0 || buf[offset+i*4+3] != 255) {
+ fail(22 + i, 25, name, buf, "(255,0,0,255)");
+ return;
+ }
+ }
+
+ // Last line should be all black
+ offset = (49*50) * 4;
+ for (var i = 0; i < 50; ++i) {
+ if (buf[offset+i*4] != 0 || buf[offset+i*4+1] != 0 || buf[offset+i*4+2] != 0 || buf[offset+i*4+3] != 255) {
+ fail(i, 49, name, buf, "(0,0,0,255)");
+ return;
+ }
+ }
+
+ pass(name);
+ }
+
+ function checkColors() {
+ var buf = new Uint8Array(50 * 50 * 4);
+ gl.readPixels(0, 0, 50, 50, gl.RGBA, gl.UNSIGNED_BYTE, buf);
+ checkData(buf, "3d context");
+ var imgData = ctx2d.getImageData(0, 0, 50, 50);
+ checkData(imgData.data, "2d context");
+ }
+
+ var table = [1, 2, 4, 8];
+ for (var ii = 0; ii < table.length; ++ii) {
+ gl.pixelStorei(gl.PACK_ALIGNMENT, table[ii]);
+ ctx2d = document.getElementById("2d0" + ii).getContext("2d");
+ ctx2d.globalCompositeOperation = 'copy';
+ ctx2d.drawImage(canvas3d, 0, 0);
+ checkColors();
+ assertMsg(gl.getParameter(gl.PACK_ALIGNMENT) == table[ii],
+ "PACK_ALIGNMENT is " + table[ii]);
+ }
+}
+
+init();
+successfullyParsed = true;
+</script>
+<script src="../../resources/js-test-post.js"></script>
+
+</body>
+</html>
Property changes on: conformance/textures/gl-pixelstorei.html
___________________________________________________________________
Added: svn:eol-style
+ LF
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