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Unified Diff: conformance/rendering/point-size.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/rendering/point-size.html
===================================================================
--- conformance/rendering/point-size.html (revision 0)
+++ conformance/rendering/point-size.html (revision 0)
@@ -0,0 +1,133 @@
+<!--
+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">
+<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 id="vshader" type="x-shader/x-vertex">
+attribute vec3 pos;
+attribute vec4 colorIn;
+uniform float pointSize;
+varying vec4 color;
+
+void main()
+{
+ gl_PointSize = pointSize;
+ color = colorIn;
+ gl_Position = vec4(pos.xyz, 3.0);
+}
+</script>
+
+<script id="fshader" type="x-shader/x-fragment">
+precision mediump float;
+varying vec4 color;
+
+void main()
+{
+ gl_FragColor = color;
+}
+</script>
+
+<script>
+function runTest()
+{
+ var gl = initWebGL('testbed', 'vshader', 'fshader', ['pos', 'colorIn'], [0, 0, 0, 1], 1, { antialias: false });
+ if (!gl) {
+ testFailed('initWebGL(..) failed');
+ return false;
+ }
+ gl.disable(gl.BLEND);
+ gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
+
+ // The choice of (0.4, 0.4) ensures that the centers of the surrounding
+ // pixels are not contained within the point when it is of size 1, but
+ // that they definitely are when it is of size 2.
+ var vertices = new Float32Array([
+ 0.4, 0.4, 0.0]);
+ var colors = new Uint8Array([
+ 255, 0, 0, 255]);
+
+ var colorOffset = vertices.byteLength;
+
+ var vbo = gl.createBuffer();
+ gl.bindBuffer(gl.ARRAY_BUFFER, vbo);
+ gl.bufferData(gl.ARRAY_BUFFER, colorOffset + colors.byteLength, gl.STATIC_DRAW);
+ gl.bufferSubData(gl.ARRAY_BUFFER, 0, vertices);
+ gl.bufferSubData(gl.ARRAY_BUFFER, colorOffset, colors);
+
+ gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);
+ gl.enableVertexAttribArray(0);
+ gl.vertexAttribPointer(1, 4, gl.UNSIGNED_BYTE, true, 0, colorOffset);
+ gl.enableVertexAttribArray(1);
+
+ var locPointSize = gl.getUniformLocation(gl.program, 'pointSize');
+
+ debug('Draw a point of size 1 and verify it does not touch any other pixels.');
+
+ gl.uniform1f(locPointSize, 1.0);
+ gl.drawArrays(gl.POINTS, 0, vertices.length / 3);
+ var buf = new Uint8Array(2 * 2 * 4);
+ gl.readPixels(0, 0, 2, 2, gl.RGBA, gl.UNSIGNED_BYTE, buf);
+ var index = 0;
+ for (var y = 0; y < 2; ++y) {
+ for (var x = 0; x < 2; ++x) {
+ var correctColor = [0, 0, 0];
+ if (x == 1 && y == 1)
+ correctColor[0] = 255;
+ if (buf[index] != correctColor[0] || buf[index + 1] != correctColor[1] || buf[index + 2] != correctColor[2]) {
+ testFailed('Drawing a point of size 1 touched pixels that should not be touched');
+ return false;
+ }
+ index += 4;
+ }
+ }
+ gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
+
+ debug('Draw a point of size 2 and verify it fills the appropriate region.');
+
+ var pointSizeRange = gl.getParameter(gl.ALIASED_POINT_SIZE_RANGE);
+ if (pointSizeRange < 2.0)
+ return true;
+
+ gl.uniform1f(locPointSize, 2.0);
+ gl.drawArrays(gl.POINTS, 0, vertices.length / 3);
+ gl.readPixels(0, 0, 2, 2, gl.RGBA, gl.UNSIGNED_BYTE, buf);
+ index = 0;
+ for (var y = 0; y < 2; ++y) {
+ for (var x = 0; x < 2; ++x) {
+ var correctColor = [255, 0, 0];
+ if (buf[index] != correctColor[0] || buf[index + 1] != correctColor[1] || buf[index + 2] != correctColor[2]) {
+ testFailed('Drawing a point of size 2 failed to fill the appropriate region');
+ return false;
+ }
+ index += 4;
+ }
+ }
+
+ return true;
+}
+</script>
+</head>
+<body>
+<canvas id="testbed" width="2px" height="2px"></canvas>
+<div id="description"></div>
+<div id="console"></div>
+<script>
+description('Verify GL_VERTEX_PROGRAM_POINT_SIZE is enabled in WebGL');
+
+if (runTest())
+ testPassed("");
+
+successfullyParsed = true;
+</script>
+
+<script src="../../resources/js-test-post.js"></script>
+
+</body>
+</html>
Property changes on: conformance/rendering/point-size.html
___________________________________________________________________
Added: svn:eol-style
+ LF
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