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| (Empty) |
| 1 <html> | |
| 2 <head> | |
| 3 <script src="../../../resources/js-test.js"></script> | |
| 4 <script src="resources/webgl-test.js"></script> | |
| 5 <script id="vshader" type="x-shader/x-vertex"> | |
| 6 attribute vec3 g_Position; | |
| 7 | |
| 8 void main() | |
| 9 { | |
| 10 gl_Position = vec4(g_Position.x, g_Position.y, g_Position.z, 1.0); | |
| 11 } | |
| 12 </script> | |
| 13 | |
| 14 <script id="fshader" type="x-shader/x-fragment"> | |
| 15 void main() | |
| 16 { | |
| 17 gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0); | |
| 18 } | |
| 19 </script> | |
| 20 | |
| 21 </head> | |
| 22 <body> | |
| 23 <canvas id="example" width="4px" height="4px"></canvas> | |
| 24 <div id="description"></div> | |
| 25 <div id="console"></div> | |
| 26 <script> | |
| 27 description('Verifies that GL viewport does not change when canvas is resized'); | |
| 28 | |
| 29 var gl = initWebGL("example", "vshader", "fshader", [ "g_Position" ], [ 0, 0, 1,
1 ], 1); | |
| 30 | |
| 31 var vertices = new Float32Array([ | |
| 32 1.0, 1.0, 0.0, | |
| 33 -1.0, 1.0, 0.0, | |
| 34 -1.0, -1.0, 0.0, | |
| 35 1.0, 1.0, 0.0, | |
| 36 -1.0, -1.0, 0.0, | |
| 37 1.0, -1.0, 0.0]); | |
| 38 var vbo = gl.createBuffer(); | |
| 39 gl.bindBuffer(gl.ARRAY_BUFFER, vbo); | |
| 40 gl.bufferData(gl.ARRAY_BUFFER, vertices, gl.STATIC_DRAW); | |
| 41 | |
| 42 gl.enableVertexAttribArray(0); | |
| 43 gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0); | |
| 44 | |
| 45 // Clear and set up | |
| 46 gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); | |
| 47 gl.useProgram(gl.program); | |
| 48 // Draw the triangle pair to the frame buffer | |
| 49 gl.drawArrays(gl.TRIANGLES, 0, 6); | |
| 50 | |
| 51 // Ensure that the frame buffer is red at the sampled pixel | |
| 52 var buf = new Uint8Array(1 * 1 * 4); | |
| 53 gl.readPixels(2, 2, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, buf); | |
| 54 var passed = true; | |
| 55 if (buf[0] != 255 || | |
| 56 buf[1] != 0 || | |
| 57 buf[2] != 0 || | |
| 58 buf[3] != 255) { | |
| 59 testFailed("Pixel at (2, 2) should have been (255, 0, 0, 255), " + | |
| 60 "was (" + buf[0] + ", " + buf[1] + ", " + buf[2] + ", " + buf[3] +
")"); | |
| 61 passed = false; | |
| 62 } | |
| 63 | |
| 64 if (passed) { | |
| 65 // Now resize the canvas | |
| 66 var canvas = document.getElementById("example"); | |
| 67 canvas.width = 8; | |
| 68 canvas.height = 8; | |
| 69 // Do another render | |
| 70 gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); | |
| 71 gl.drawArrays(gl.TRIANGLES, 0, 6); | |
| 72 // This time, because we did not change the viewport, it should | |
| 73 // still be (0, 0, 4, 4), so only the lower-left quadrant should | |
| 74 // have been filled. | |
| 75 var buf = new Uint8Array(1 * 1 * 4); | |
| 76 gl.readPixels(6, 6, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, buf); | |
| 77 var passed = true; | |
| 78 if (buf[0] != 0 || | |
| 79 buf[1] != 0 || | |
| 80 buf[2] != 255 || | |
| 81 buf[3] != 255) { | |
| 82 testFailed("Pixel at (6, 6) should have been (0, 0, 255, 255), " + | |
| 83 "was (" + buf[0] + ", " + buf[1] + ", " + buf[2] + ", " + buf[3]
+ ")"); | |
| 84 passed = false; | |
| 85 } | |
| 86 } | |
| 87 | |
| 88 if (passed) | |
| 89 testPassed("Viewport correctly did not change size during canvas resize"); | |
| 90 </script> | |
| 91 </body> | |
| 92 </html> | |
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Chromium Code Reviews
Issue 1601093008:
Remove duplicated WebGL layout tests. (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master