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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 <html> |
| 7 <head> |
| 8 <meta charset="utf-8"> |
| 9 <link rel="stylesheet" href="../../resources/js-test-style.css"/> |
| 10 <script src="../../resources/js-test-pre.js"></script> |
| 11 <script src="../resources/webgl-test.js"></script> |
| 12 <script id="vshader" type="x-shader/x-vertex"> |
| 13 attribute vec3 g_Position; |
| 14 |
| 15 void main() |
| 16 { |
| 17 gl_Position = vec4(g_Position.x, g_Position.y, g_Position.z, 1.0); |
| 18 } |
| 19 </script> |
| 20 |
| 21 <script id="fshader" type="x-shader/x-fragment"> |
| 22 void main() |
| 23 { |
| 24 gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0); |
| 25 } |
| 26 </script> |
| 27 |
| 28 </head> |
| 29 <body> |
| 30 <canvas id="example" width="4px" height="4px"></canvas> |
| 31 <div id="description"></div> |
| 32 <div id="console"></div> |
| 33 <script> |
| 34 description('Verifies that GL viewport does not change when canvas is resized'); |
| 35 |
| 36 var err; |
| 37 var gl = initWebGL("example", "vshader", "fshader", [ "g_Position" ], [ 0, 0, 1,
1 ], 1); |
| 38 |
| 39 var vertices = new Float32Array([ |
| 40 1.0, 1.0, 0.0, |
| 41 -1.0, 1.0, 0.0, |
| 42 -1.0, -1.0, 0.0, |
| 43 1.0, 1.0, 0.0, |
| 44 -1.0, -1.0, 0.0, |
| 45 1.0, -1.0, 0.0]); |
| 46 var vbo = gl.createBuffer(); |
| 47 gl.bindBuffer(gl.ARRAY_BUFFER, vbo); |
| 48 gl.bufferData(gl.ARRAY_BUFFER, vertices, gl.STATIC_DRAW); |
| 49 |
| 50 gl.enableVertexAttribArray(0); |
| 51 gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0); |
| 52 |
| 53 // Clear and set up |
| 54 gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); |
| 55 gl.useProgram(gl.program); |
| 56 // Draw the triangle pair to the frame buffer |
| 57 gl.drawArrays(gl.TRIANGLES, 0, 6); |
| 58 |
| 59 // Ensure that the frame buffer is red at the sampled pixel |
| 60 var buf = new Uint8Array(1 * 1 * 4); |
| 61 gl.readPixels(2, 2, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, buf); |
| 62 var passed = true; |
| 63 if (buf[0] != 255 || |
| 64 buf[1] != 0 || |
| 65 buf[2] != 0 || |
| 66 buf[3] != 255) { |
| 67 testFailed("Pixel at (2, 2) should have been (255, 0, 0, 255), " + |
| 68 "was (" + buf[0] + ", " + buf[1] + ", " + buf[2] + ", " + buf[3] +
")"); |
| 69 passed = false; |
| 70 } |
| 71 |
| 72 if (passed) { |
| 73 // Now resize the canvas |
| 74 glErrorShouldBe(gl, gl.NO_ERROR, "No GL errors before resizing the canvas"); |
| 75 var canvas = document.getElementById("example"); |
| 76 canvas.width = 8; |
| 77 canvas.height = 8; |
| 78 err = gl.getError(); |
| 79 // Some implementations might lost the context when resizing |
| 80 if (err == gl.CONTEXT_LOST_WEBGL) { |
| 81 testPassed("canvas lost context on resize"); |
| 82 } else { |
| 83 shouldBe("err", "gl.NO_ERROR"); |
| 84 // Do another render |
| 85 gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); |
| 86 gl.drawArrays(gl.TRIANGLES, 0, 6); |
| 87 // This time, because we did not change the viewport, it should |
| 88 // still be (0, 0, 4, 4), so only the lower-left quadrant should |
| 89 // have been filled. |
| 90 var buf = new Uint8Array(1 * 1 * 4); |
| 91 gl.readPixels(6, 6, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, buf); |
| 92 var passed = true; |
| 93 if (buf[0] != 0 || |
| 94 buf[1] != 0 || |
| 95 buf[2] != 255 || |
| 96 buf[3] != 255) { |
| 97 testFailed("Pixel at (6, 6) should have been (0, 0, 255, 255), " + |
| 98 "was (" + buf[0] + ", " + buf[1] + ", " + buf[2] + ", " + buf[3
] + ")"); |
| 99 passed = false; |
| 100 } |
| 101 if (passed) { |
| 102 testPassed("Viewport correctly did not change size during canvas resize"); |
| 103 } |
| 104 } |
| 105 } |
| 106 |
| 107 successfullyParsed = true; |
| 108 </script> |
| 109 <script src="../../resources/js-test-post.js"></script> |
| 110 </body> |
| 111 </html> |
| 112 |
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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/