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| 1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" | |
| 2 "http://www.w3.org/TR/html4/loose.dtd"> | |
| 3 <html> | |
| 4 <head> | |
| 5 <title>WebGL pixelStorei Test</title> | |
| 6 <script src="../../../resources/js-test.js"></script> | |
| 7 <script src="resources/webgl-test.js"> </script> | |
| 8 <script src="resources/desktop-gl-constants.js" type="text/javascript"></script> | |
| 9 </head> | |
| 10 <body> | |
| 11 <canvas id="example" width="50" height="50"></canvas> | |
| 12 <canvas id="2d00" width="50" height="50"></canvas> | |
| 13 <canvas id="2d01" width="50" height="50"></canvas> | |
| 14 <canvas id="2d02" width="50" height="50"></canvas> | |
| 15 <canvas id="2d03" width="50" height="50"></canvas> | |
| 16 <div id="description"></div> | |
| 17 <div id="console"></div> | |
| 18 <script id="vshader" type="x-shader/x-vertex"> | |
| 19 attribute vec4 vPosition; | |
| 20 void main() { | |
| 21 gl_Position = vPosition; | |
| 22 } | |
| 23 </script> | |
| 24 | |
| 25 <script id="fshader" type="x-shader/x-fragment"> | |
| 26 void main() { | |
| 27 gl_FragColor = vec4(1.0,0.0,0.0,1.0); | |
| 28 } | |
| 29 </script> | |
| 30 | |
| 31 <script> | |
| 32 function fail(x,y, name, buf, shouldBe) { | |
| 33 var i = (y*50+x) * 4; | |
| 34 var reason = "pixel in "+name+" at ("+x+","+y+") is ("+buf[i]+","+buf[i+1]+","
+buf[i+2]+","+buf[i+3]+"), should be "+shouldBe; | |
| 35 testFailed(reason); | |
| 36 } | |
| 37 | |
| 38 function pass(name) { | |
| 39 testPassed("drawing is correct in " + name); | |
| 40 } | |
| 41 | |
| 42 function init() { | |
| 43 debug("There should be 5 red triangles on 5 black squares above"); | |
| 44 debug(""); | |
| 45 | |
| 46 debug("This test checks that drawImage and readPixels are not effected by gl.P
ixelstorei(gl.PACK_ALIGNMENT) and visa versa"); | |
| 47 debug(""); | |
| 48 | |
| 49 var canvas3d = document.getElementById("example"); | |
| 50 gl = initWebGL("example", "vshader", "fshader", [ "vPosition"], [ 0, 0, 0, 1 ]
, 1); | |
| 51 | |
| 52 var vertexObject = gl.createBuffer(); | |
| 53 gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject); | |
| 54 gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ 0,0.5,0, -0.5,-0.5,0, 0.5,-0
.5,0 ]), gl.STATIC_DRAW); | |
| 55 gl.enableVertexAttribArray(0); | |
| 56 gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0); | |
| 57 | |
| 58 gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); | |
| 59 gl.drawArrays(gl.TRIANGLES, 0, 3); | |
| 60 | |
| 61 | |
| 62 function checkData(buf, name) { | |
| 63 // Test several locations | |
| 64 // First line should be all black | |
| 65 for (var i = 0; i < 50; ++i) { | |
| 66 if (buf[i*4] != 0 || buf[i*4+1] != 0 || buf[i*4+2] != 0 || buf[i*4+3] != 2
55) { | |
| 67 fail(i, 0, name, buf, "(0,0,0,255)"); | |
| 68 return; | |
| 69 } | |
| 70 } | |
| 71 | |
| 72 // Line 25 should be red for at least 6 red pixels starting 22 pixels in | |
| 73 var offset = (25*50+22) * 4; | |
| 74 for (var i = 0; i < 6; ++i) { | |
| 75 if (buf[offset+i*4] != 255 || buf[offset+i*4+1] != 0 || buf[offset+i*4+2]
!= 0 || buf[offset+i*4+3] != 255) { | |
| 76 fail(22 + i, 25, name, buf, "(255,0,0,255)"); | |
| 77 return; | |
| 78 } | |
| 79 } | |
| 80 | |
| 81 // Last line should be all black | |
| 82 offset = (49*50) * 4; | |
| 83 for (var i = 0; i < 50; ++i) { | |
| 84 if (buf[offset+i*4] != 0 || buf[offset+i*4+1] != 0 || buf[offset+i*4+2] !=
0 || buf[offset+i*4+3] != 255) { | |
| 85 fail(i, 49, name, buf, "(0,0,0,255)"); | |
| 86 return; | |
| 87 } | |
| 88 } | |
| 89 | |
| 90 pass(name); | |
| 91 } | |
| 92 | |
| 93 function checkColors() { | |
| 94 var buf = new Uint8Array(50 * 50 * 4); | |
| 95 gl.readPixels(0, 0, 50, 50, gl.RGBA, gl.UNSIGNED_BYTE, buf); | |
| 96 checkData(buf, "3d context"); | |
| 97 var imgData = ctx2d.getImageData(0, 0, 50, 50); | |
| 98 checkData(imgData.data, "2d context"); | |
| 99 } | |
| 100 | |
| 101 var table = [1, 2, 4, 8]; | |
| 102 for (var ii = 0; ii < table.length; ++ii) { | |
| 103 gl.pixelStorei(gl.PACK_ALIGNMENT, table[ii]); | |
| 104 ctx2d = document.getElementById("2d0" + ii).getContext("2d"); | |
| 105 ctx2d.globalCompositeOperation = 'copy'; | |
| 106 ctx2d.drawImage(canvas3d, 0, 0); | |
| 107 checkColors(); | |
| 108 assertMsg(gl.getParameter(gl.PACK_ALIGNMENT) == table[ii], | |
| 109 "PACK_ALIGNMENT is " + table[ii]); | |
| 110 } | |
| 111 } | |
| 112 | |
| 113 init(); | |
| 114 </script> | |
| 115 </body> | |
| 116 | |
| 117 <script> | |
| 118 </script> | |
| 119 | |
| 120 </body> | |
| 121 </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