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| 1 <!-- |
| 2 Copyright (c) 2011 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> |
| 7 <html> |
| 8 <head> |
| 9 <meta charset="utf-8"> |
| 10 <link rel="stylesheet" href="../../resources/js-test-style.css"/> |
| 11 <script src="../../resources/js-test-pre.js"></script> |
| 12 <script src="../resources/webgl-test.js"></script> |
| 13 <script src="../resources/webgl-test-utils.js"></script> |
| 14 <script id="fshader" type="x-shader/x-fragment"> |
| 15 precision mediump float; |
| 16 |
| 17 uniform sampler2D tex; |
| 18 varying vec2 texCoord; |
| 19 |
| 20 void main() |
| 21 { |
| 22 float intensity = texture2D(tex, texCoord).a; |
| 23 gl_FragColor = vec4(intensity, intensity, intensity, 1.0); |
| 24 } |
| 25 </script> |
| 26 |
| 27 </head> |
| 28 <body> |
| 29 <canvas id="example" width="256px" height="1px"></canvas> |
| 30 <div id="description"></div> |
| 31 <div id="console"></div> |
| 32 <script> |
| 33 description('Tests texSubImage2D upload path from Uint8Array'); |
| 34 |
| 35 var wtu = WebGLTestUtils; |
| 36 var canvas = document.getElementById("example"); |
| 37 var gl = wtu.create3DContext(canvas); |
| 38 var program = wtu.setupProgram( |
| 39 gl, |
| 40 [wtu.setupSimpleTextureVertexShader(gl), |
| 41 wtu.loadShaderFromScript(gl, "fshader")], |
| 42 ['vPosition', 'texCoord0']); |
| 43 wtu.setupUnitQuad(gl); |
| 44 var textureWidth = 256; |
| 45 var textureHeight = 1; |
| 46 |
| 47 textureLoc = gl.getUniformLocation(program, "tex"); |
| 48 |
| 49 var texture = gl.createTexture(); |
| 50 gl.bindTexture(gl.TEXTURE_2D, texture); |
| 51 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE); |
| 52 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE); |
| 53 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST); |
| 54 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST); |
| 55 // Allocate the texture object |
| 56 gl.texImage2D(gl.TEXTURE_2D, 0, gl.ALPHA, textureWidth, textureHeight, 0, gl.ALP
HA, gl.UNSIGNED_BYTE, null); |
| 57 // Prepare the image data |
| 58 var array = new Uint8Array(textureWidth); |
| 59 for (var i = 0; i < textureWidth; i++) |
| 60 array[i] = i; |
| 61 // Fill the texture object with data -- this is actually the code path being tes
ted |
| 62 gl.texSubImage2D(gl.TEXTURE_2D, 0, 0, 0, textureWidth, textureHeight, gl.ALPHA,
gl.UNSIGNED_BYTE, array); |
| 63 |
| 64 // Clear and set up |
| 65 gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); |
| 66 gl.bindTexture(gl.TEXTURE_2D, texture); |
| 67 gl.useProgram(program); |
| 68 gl.uniform1i(textureLoc, 0); |
| 69 // Draw the texture to the frame buffer |
| 70 gl.drawArrays(gl.TRIANGLES, 0, 6); |
| 71 |
| 72 // Read back the frame buffer |
| 73 var buf = new Uint8Array(textureWidth * textureHeight * 4); |
| 74 gl.readPixels(0, 0, textureWidth, textureHeight, gl.RGBA, gl.UNSIGNED_BYTE, buf)
; |
| 75 |
| 76 // Verify the frame buffer's contents |
| 77 var passed = true; |
| 78 for (var i = 0; i < textureWidth; i++) { |
| 79 var val = i; |
| 80 if (buf[4 * i + 0] != val || |
| 81 buf[4 * i + 1] != val || |
| 82 buf[4 * i + 2] != val) { |
| 83 testFailed("pixel at (" + i + ", 0) was (" + |
| 84 buf[4 * i + 0] + ", " + |
| 85 buf[4 * i + 1] + ", " + |
| 86 buf[4 * i + 2] + "), should be (" + |
| 87 val + ", " + val + ", " + val + ")"); |
| 88 passed = false; |
| 89 break; |
| 90 } |
| 91 } |
| 92 |
| 93 if (passed) |
| 94 testPassed(""); |
| 95 |
| 96 successfullyParsed = true; |
| 97 </script> |
| 98 <script src="../../resources/js-test-post.js"></script> |
| 99 </body> |
| 100 </html> |
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Chromium Code Reviews
Issue 8342021:
Add webgl conformance tests r15841. (Closed)
Base URL: svn://chrome-svn/chrome/trunk/deps/third_party/webgl/sdk/tests/