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| 1 <!-- |
| 2 |
| 3 /* |
| 4 ** Copyright (c) 2013 The Khronos Group Inc. |
| 5 ** |
| 6 ** Permission is hereby granted, free of charge, to any person obtaining a |
| 7 ** copy of this software and/or associated documentation files (the |
| 8 ** "Materials"), to deal in the Materials without restriction, including |
| 9 ** without limitation the rights to use, copy, modify, merge, publish, |
| 10 ** distribute, sublicense, and/or sell copies of the Materials, and to |
| 11 ** permit persons to whom the Materials are furnished to do so, subject to |
| 12 ** the following conditions: |
| 13 ** |
| 14 ** The above copyright notice and this permission notice shall be included |
| 15 ** in all copies or substantial portions of the Materials. |
| 16 ** |
| 17 ** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 18 ** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 19 ** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 20 ** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
| 21 ** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| 22 ** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| 23 ** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS. |
| 24 */ |
| 25 |
| 26 --> |
| 27 |
| 28 <!DOCTYPE html> |
| 29 <html> |
| 30 <head> |
| 31 <meta charset="utf-8"> |
| 32 <title>WebGL compressed texture size limit conformance test</title> |
| 33 <link rel="stylesheet" href="../../resources/js-test-style.css"/> |
| 34 <script src="../../resources/js-test-pre.js"></script> |
| 35 <script src="../resources/webgl-test.js"> </script> |
| 36 <script src="../resources/webgl-test-utils.js"></script> |
| 37 </head> |
| 38 <body> |
| 39 <canvas id="example" width="32" height="32" style="width: 40px; height: 40px;"><
/canvas> |
| 40 <div id="description"></div> |
| 41 <div id="console"></div> |
| 42 <script> |
| 43 "use strict"; |
| 44 description("Checks size limit of the webgl compressed textures") |
| 45 var canvas; |
| 46 |
| 47 function numLevelsFromSize(size) { |
| 48 var levels = 0; |
| 49 while ((size >> levels) > 0) { |
| 50 ++levels; |
| 51 } |
| 52 return levels; |
| 53 } |
| 54 |
| 55 // More formats can be added here when more texture compression extensions is en
abled in WebGL. |
| 56 var validFormats = { |
| 57 COMPRESSED_RGB_S3TC_DXT1_EXT : 0x83F0, |
| 58 COMPRESSED_RGBA_S3TC_DXT1_EXT : 0x83F1, |
| 59 COMPRESSED_RGBA_S3TC_DXT3_EXT : 0x83F2, |
| 60 COMPRESSED_RGBA_S3TC_DXT5_EXT : 0x83F3, |
| 61 }; |
| 62 |
| 63 // format specific restrictions for COMPRESSED_RGB_S3TC_DXT1_EXT and COMPRESSED_
RGBA_S3TC_DXT1_EXT |
| 64 // on the byteLength of the ArrayBufferView, pixels |
| 65 function func1 (width, height) |
| 66 { |
| 67 return Math.floor((width + 3) / 4) * Math.floor((height + 3) / 4) * 8; |
| 68 } |
| 69 |
| 70 // format specific restrictions for COMPRESSED_RGBA_S3TC_DXT3_EXT and COMPRESSED
_RGBA_S3TC_DXT5_EXT |
| 71 // on the byteLength of the ArrayBufferView, pixels |
| 72 function func2 (width, height) |
| 73 { |
| 74 return Math.floor((width + 3) / 4) * Math.floor((height + 3) / 4) * 16; |
| 75 } |
| 76 |
| 77 var wtu = WebGLTestUtils; |
| 78 var gl = wtu.create3DContext("example"); |
| 79 var tests = [ |
| 80 // More tests can be added here when more texture compression extensions is en
abled in WebGL. |
| 81 { extension: "WEBGL_compressed_texture_s3tc", format: validFormats.COMPRESSED_
RGB_S3TC_DXT1_EXT, dataType: Uint8Array, func: func1}, |
| 82 { extension: "WEBGL_compressed_texture_s3tc", format: validFormats.COMPRESSED_
RGBA_S3TC_DXT1_EXT, dataType: Uint8Array, func: func1}, |
| 83 { extension: "WEBGL_compressed_texture_s3tc", format: validFormats.COMPRESSED_
RGBA_S3TC_DXT3_EXT, dataType: Uint8Array, func: func2}, |
| 84 { extension: "WEBGL_compressed_texture_s3tc", format: validFormats.COMPRESSED_
RGBA_S3TC_DXT5_EXT, dataType: Uint8Array, func: func2}, |
| 85 ]; |
| 86 |
| 87 // Note: We expressly only use 2 textures because first a texture will be define
d |
| 88 // as using all mips of 1 format, then for a moment it will have mixed formats w
hich |
| 89 // may uncover bugs. |
| 90 var targets = [ |
| 91 { target: gl.TEXTURE_2D, |
| 92 maxSize: gl.getParameter(gl.MAX_TEXTURE_SIZE), |
| 93 tex: gl.createTexture(), |
| 94 targets: [gl.TEXTURE_2D] |
| 95 }, |
| 96 { target: gl.TEXTURE_CUBE_MAP, |
| 97 maxSize: gl.getParameter(gl.MAX_CUBE_MAP_TEXTURE_SIZE), |
| 98 tex: gl.createTexture(), |
| 99 targets: [ |
| 100 gl.TEXTURE_CUBE_MAP_POSITIVE_X, |
| 101 gl.TEXTURE_CUBE_MAP_NEGATIVE_X, |
| 102 gl.TEXTURE_CUBE_MAP_POSITIVE_Y, |
| 103 gl.TEXTURE_CUBE_MAP_NEGATIVE_Y, |
| 104 gl.TEXTURE_CUBE_MAP_POSITIVE_Z, |
| 105 gl.TEXTURE_CUBE_MAP_NEGATIVE_Z |
| 106 ] |
| 107 } |
| 108 ]; |
| 109 |
| 110 gl.pixelStorei(gl.UNPACK_ALIGNMENT, 1); |
| 111 |
| 112 var trg = 0; |
| 113 var tt = 0; |
| 114 runNextTest(); |
| 115 |
| 116 function runNextTest() { |
| 117 var t = targets[trg]; |
| 118 |
| 119 if (tt == 0) { |
| 120 var tex = t.tex; |
| 121 gl.bindTexture(t.target, tex); |
| 122 |
| 123 debug(""); |
| 124 debug("max size for " + wtu.glEnumToString(gl, t.target) + ": " + t.maxSize)
; |
| 125 var numLevels = numLevelsFromSize(t.maxSize); |
| 126 debug("num levels " + numLevels); |
| 127 } |
| 128 |
| 129 var test = tests[tt]; |
| 130 testFormatType(t, test); |
| 131 ++tt; |
| 132 if (tt == tests.length) { |
| 133 tt = 0; |
| 134 ++trg; |
| 135 if (trg == targets.length) { |
| 136 finishTest(); |
| 137 return; |
| 138 } |
| 139 } |
| 140 wtu.waitForComposite(gl, runNextTest) |
| 141 } |
| 142 |
| 143 function testFormatType(t, test) { |
| 144 debug(""); |
| 145 |
| 146 // Query the extension and store globally so shouldBe can access it |
| 147 var ext = wtu.getExtensionWithKnownPrefixes(gl, test.extension); |
| 148 if (ext) { |
| 149 testPassed("Successfully enabled " + test.extension + " extension"); |
| 150 |
| 151 for (var j = 0; j < t.targets.length; ++j) { |
| 152 var target = t.targets[j]; |
| 153 debug(""); |
| 154 debug(wtu.glEnumToString(gl, target)); |
| 155 var numLevels = numLevelsFromSize(t.maxSize); |
| 156 |
| 157 // positive test |
| 158 for (var i = 0, size = t.maxSize; i < numLevels; i++, size /= 2) { |
| 159 var pixels = new test.dataType(test.func(size, size)); |
| 160 gl.compressedTexImage2D(target, i, test.format, size, size, 0, pixels); |
| 161 glErrorShouldBe(gl, gl.NO_ERROR, "uploading compressed texture should ge
nerate NO_ERROR." |
| 162 + "level is " + i + ", size is " + size + "x" + size); |
| 163 } |
| 164 |
| 165 // out of bound test |
| 166 // width or height out of bound |
| 167 var pixelsNegativeTest1 = new test.dataType(test.func(t.maxSize * 2, t.max
Size * 2)); |
| 168 gl.compressedTexImage2D(target, 0, test.format, t.maxSize * 2, t.maxSize *
2, 0, pixelsNegativeTest1); |
| 169 glErrorShouldBe(gl, gl.INVALID_VALUE, "width or height out of bound: shoul
d generate INVALID_VALUE." |
| 170 + " level is 0, size is " + (t.maxSize * 2) + "x" + (t.maxSize * 2)); |
| 171 // level out of bound |
| 172 var pixelsNegativeTest2 = new test.dataType(test.func(256, 256)); |
| 173 gl.compressedTexImage2D(target, numLevels, test.format, 256, 256, 0, pixel
sNegativeTest2); |
| 174 glErrorShouldBe(gl, gl.INVALID_VALUE, "level out of bound: should generate
INVALID_VALUE." |
| 175 + " level is " + numLevels + ", size is 256x256"); |
| 176 //width or height out of bound for specified level |
| 177 gl.compressedTexImage2D(target, numLevels - 1, test.format, 256, 256, 0, p
ixelsNegativeTest2); |
| 178 glErrorShouldBe(gl, gl.INVALID_VALUE, "width or height out of bound for sp
ecified level: should generate INVALID_VALUE." |
| 179 + " level is " + (numLevels - 1) + ", size is 256x256"); |
| 180 } |
| 181 } |
| 182 else |
| 183 testPassed("No " + test.extension + " extension support -- this is legal"); |
| 184 } |
| 185 |
| 186 var successfullyParsed = true; |
| 187 </script> |
| 188 </body> |
| 189 </html> |
| 190 |
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