mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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134 lines
3.9 KiB
HTML
134 lines
3.9 KiB
HTML
<!--
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Copyright (c) 2010 The Chromium Authors. All rights reserved.
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Use of this source code is governed by a BSD-style license that can be
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found in the LICENSE file.
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-->
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<html>
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<head>
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<link rel="stylesheet" href="../resources/js-test-style.css"/>
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<script src="../resources/js-test-pre.js"></script>
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<script src="resources/webgl-test.js"></script>
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<script id="vshader" type="x-shader/x-vertex">
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attribute vec3 pos;
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attribute vec4 colorIn;
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uniform float pointSize;
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varying vec4 color;
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void main()
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{
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gl_PointSize = pointSize;
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color = colorIn;
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gl_Position = vec4(pos.xyz, 3.0);
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}
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</script>
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<script id="fshader" type="x-shader/x-fragment">
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#ifdef GL_ES
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precision mediump float;
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#endif
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varying vec4 color;
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void main()
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{
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gl_FragColor = color;
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}
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</script>
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<script>
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function runTest()
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{
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var gl = initWebGL('testbed', 'vshader', 'fshader', ['pos', 'colorIn'], [0, 0, 0, 1], 1, { antialias: false });
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if (!gl) {
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testFailed('initWebGL(..) failed');
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return false;
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}
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gl.disable(gl.BLEND);
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gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
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// The choice of (0.4, 0.4) ensures that the centers of the surrounding
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// pixels are not contained within the point when it is of size 1, but
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// that they definitely are when it is of size 2.
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var vertices = new Float32Array([
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0.4, 0.4, 0.0]);
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var colors = new Uint8Array([
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255, 0, 0, 255]);
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var colorOffset = vertices.byteLength;
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var vbo = gl.createBuffer();
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gl.bindBuffer(gl.ARRAY_BUFFER, vbo);
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gl.bufferData(gl.ARRAY_BUFFER, colorOffset + colors.byteLength, gl.STATIC_DRAW);
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gl.bufferSubData(gl.ARRAY_BUFFER, 0, vertices);
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gl.bufferSubData(gl.ARRAY_BUFFER, colorOffset, colors);
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gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);
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gl.enableVertexAttribArray(0);
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gl.vertexAttribPointer(1, 4, gl.UNSIGNED_BYTE, true, 0, colorOffset);
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gl.enableVertexAttribArray(1);
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var locPointSize = gl.getUniformLocation(gl.program, 'pointSize');
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debug('Draw a point of size 1 and verify it does not touch any other pixels.');
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gl.uniform1f(locPointSize, 1.0);
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gl.drawArrays(gl.POINTS, 0, vertices.length / 3);
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var buf = new Uint8Array(2 * 2 * 4);
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gl.readPixels(0, 0, 2, 2, gl.RGBA, gl.UNSIGNED_BYTE, buf);
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var index = 0;
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for (var y = 0; y < 2; ++y) {
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for (var x = 0; x < 2; ++x) {
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var correctColor = [0, 0, 0];
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if (x == 1 && y == 1)
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correctColor[0] = 255;
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if (buf[index] != correctColor[0] || buf[index + 1] != correctColor[1] || buf[index + 2] != correctColor[2]) {
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testFailed('Drawing a point of size 1 touched pixels that should not be touched');
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return false;
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}
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index += 4;
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}
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}
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gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
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debug('Draw a point of size 2 and verify it fills the appropriate region.');
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var pointSizeRange = gl.getParameter(gl.ALIASED_POINT_SIZE_RANGE);
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if (pointSizeRange < 2.0)
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return true;
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gl.uniform1f(locPointSize, 2.0);
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gl.drawArrays(gl.POINTS, 0, vertices.length / 3);
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gl.readPixels(0, 0, 2, 2, gl.RGBA, gl.UNSIGNED_BYTE, buf);
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index = 0;
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for (var y = 0; y < 2; ++y) {
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for (var x = 0; x < 2; ++x) {
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var correctColor = [255, 0, 0];
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if (buf[index] != correctColor[0] || buf[index + 1] != correctColor[1] || buf[index + 2] != correctColor[2]) {
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testFailed('Drawing a point of size 2 failed to fill the appropriate region');
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return false;
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}
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index += 4;
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}
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}
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return true;
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}
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</script>
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</head>
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<body>
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<canvas id="testbed" width="2px" height="2px"></canvas>
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<div id="description"></div>
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<div id="console"></div>
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<script>
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description('Verify GL_VERTEX_PROGRAM_POINT_SIZE is enabled in WebGL');
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if (runTest())
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testPassed("");
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successfullyParsed = true;
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</script>
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<script src="../resources/js-test-post.js"></script>
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</body>
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</html>
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