third_party/webgl/sdk/tests/extra/slow-shader-example.html - Issue 9360034: Remove everthing except conformance tests in the deps/third_party/webgl

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Issue 9360034: Remove everthing except conformance tests in the deps/third_party/webgl (Closed) Base URL: svn://chrome-svn/chrome/trunk/deps/

Patch Set: Created 8 years, 10 months ago

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1 <!--

2 Copyright (c) 2009 The Chromium Authors. All rights reserved.

3 Use of this source code is governed by a BSD-style license that can be

4 found in the LICENSE file.

5 -->

6 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"

7 "http://www.w3.org/TR/html4/loose.dtd">

8 <html>

9 <head>

10 <meta charset="utf-8">

11 <title>WebGL Slow Shader example.</title>

12 <link rel="stylesheet" href="../resources/js-test-style.css"/>

13 <script src="../resources/js-test-pre.js"></script>

14 <script src="../conformance/resources/webgl-test-utils.js"> </script>

15 </head>

16 <body>

17 <canvas id="example" width="1024" height="1024" style="width: 40px; height: 40px ;">

18 </canvas>

19 <div id="description"></div>

20 <div id="console"></div>

21 <script id="slow" type="text/something-not-javascript">

22 precision mediump float;

23 uniform sampler2D tex;

24 varying vec2 texCoord;

25 void main() {

26 gl_FragColor = texture2D(tex, texture2D(tex, texture2D(tex, texCoord).xy).xy);

27 }

28 </script>

29 <script>

30 window.onload = main;

31

32 debug("Tests drawing a very slow shader.");

33 var wtu = WebGLTestUtils;

34 var canvas = document.getElementById("example");

35 canvas.addEventListener("webglcontextlost", function(e) { e.preventDefault(); }, false);

36 canvas.addEventListener("webglcontextrestored", function(e) { }, false);

37 var gl = wtu.create3DContext(canvas);

38 var maxTexSize = gl.getParameter(gl.MAX_TEXTURE_SIZE);

39 var texSize = Math.min(maxTexSize, 4096);

40 debug("Max Texture size: " + maxTexSize);

41 debug("Texture size: " + texSize);

42 var shaderSource =

43 document.getElementById("slow").text.replace(/\$size/g, texSize + ".0");

44 wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after getting a context");

45 var vs = wtu.setupSimpleTextureVertexShader(gl);

46 var fs = wtu.loadShader(

47 gl,

48 shaderSource,

49 gl.FRAGMENT_SHADER)

50 var program = wtu.setupProgram(

51 gl,

52 [vs, fs],

53 ['vPosition', 'texCoord0'],

54 [0, 1]);

55 wtu.setupUnitQuad(gl, 0, 1);

56 wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after program setup");

57 var tex = gl.createTexture();

58 gl.enable(gl.BLEND);

59 gl.disable(gl.DEPTH_TEST);

60

61 wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after creating texture");

62 debug("preparing...");

63 var numBytes = texSize * texSize * 4;

64 var pixelBuf = new ArrayBuffer(numBytes);

65 var pixels = new Uint8Array(pixelBuf);

66 for (var ii = 0; ii < numBytes; ++ii) {

67 pixels[ii] = Math.random() * 255;

68 }

69 gl.bindTexture(gl.TEXTURE_2D, tex);

70 gl.texImage2D(

71 gl.TEXTURE_2D, 0, gl.RGBA, texSize, texSize, 0,

72 gl.RGBA, gl.UNSIGNED_BYTE, pixels);

73 wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after texture setup");

74

75 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);

76 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);

77 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT);

78 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT);

79 wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after texture param setting");

80

81 var loc = gl.getUniformLocation(program, "tex");

82 wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after getting tex location");

83 gl.uniform1i(loc, 0);

84 wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after setting tex uniform");

85

86 var numQuads = 1000;

87 var indexBuf = new ArrayBuffer(numQuads * 6);

88 var indices = new Uint8Array(indexBuf);

89 for (var ii = 0; ii < numQuads; ++ii) {

90 var offset = ii * 6;

91 indices[offset + 0] = 0;

92 indices[offset + 1] = 1;

93 indices[offset + 2] = 2;

94 indices[offset + 3] = 3;

95 indices[offset + 4] = 4;

96 indices[offset + 5] = 5;

97 }

98 var indexBuffer = gl.createBuffer();

99 gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, indexBuffer);

100 gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, indices, gl.STATIC_DRAW);

101 wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after setting up indices");

102

103 function main () {

104 if (confirm(

105 "after clicking ok your machine may be come unresponsive or crash")) {

106 gl.drawElements(gl.TRIANGLES, numQuads * 6, gl.UNSIGNED_BYTE, 0);

107 wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after drawing");

108 } else {

109 debug("cancelled");

110 }

111 }

112

113 successfullyParsed = true;

114 </script>

115 </body>

116 </html>

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