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| ** Copyright (c) 2012 The Khronos Group Inc. |
| ** |
| ** Permission is hereby granted, free of charge, to any person obtaining a |
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| ** "Materials"), to deal in the Materials without restriction, including |
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| |
| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title>WebGL Texture Attachment Format Conformance Tests</title> |
| <link rel="stylesheet" href="../../../resources/js-test-style.css"/> |
| <script src="../../../js/js-test-pre.js"></script> |
| <script src="../../../js/webgl-test-utils.js"></script> |
| </head> |
| <body> |
| <div id="description"></div> |
| <div id="console"></div> |
| <canvas id="canvas" width="2" height="2" style="width: 100px; height:100px; border: 1px solid black;"> </canvas> |
| <script> |
| "use strict"; |
| description(); |
| |
| var wtu = WebGLTestUtils; |
| var gl = wtu.create3DContext("canvas"); |
| if (!gl) { |
| testFailed("context does not exist"); |
| } else { |
| testPassed("context exists"); |
| |
| debug(""); |
| debug("Checking texture formats."); |
| |
| var numValidFormats = 0; |
| var clearColor = [0.25, 0.5, 0.75, 0.25]; |
| |
| var floatToBits = function(value, bits) { |
| var range = (1 << bits) - 1; |
| var result = 0; |
| if (range > 0) { |
| result = Math.floor(Math.floor(value * range) * 255 / range); |
| } |
| |
| //debug("v = " + value + ", bits = " + bits + ", range = " + range + ", result = " + result); |
| return result; |
| } |
| |
| var testFormat = function(info) { |
| debug(""); |
| debug("testing: " + info.format + ", " + info.type); |
| |
| var format = gl[info.format]; |
| var type = gl[info.type]; |
| |
| gl.texImage2D(gl.TEXTURE_2D, |
| 0, // level |
| format, // internalFormat |
| 16, // width |
| 16, // height |
| 0, // border |
| format, // format |
| type, // type |
| null); // data |
| var fbStatus = gl.checkFramebufferStatus(gl.FRAMEBUFFER); |
| debug(wtu.glEnumToString(gl, fbStatus)); |
| if (fbStatus != gl.FRAMEBUFFER_COMPLETE) { |
| debug("format unsupported"); |
| if (info.mustBeFramebufferComplete) { |
| testFailed(info.format + " must be FRAMEBUFFER_COMPLETE"); |
| } |
| return; |
| } |
| |
| ++numValidFormats; |
| |
| var startExpected = [0, 0, 0, info.channels[3] < 0 ? 255 : 0]; |
| |
| var expected = []; |
| var tolerance = []; |
| for (var ii = 0; ii < 4; ++ii) { |
| var color = 0; |
| var channel = info.channels[ii]; |
| if (channel < 0) { |
| color = ii < 3 ? 0 : 255 |
| } else { |
| color = floatToBits(clearColor[channel], info.bits[ii]); |
| } |
| expected.push(color); |
| tolerance.push(channel < 0 ? 0 : (1 + (1 << (8 - info.bits[ii])))); |
| } |
| |
| wtu.checkCanvas(gl, startExpected, "should be " + startExpected); |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| wtu.checkCanvas(gl, expected, "should be " + expected + " with tolerance " + tolerance, tolerance); |
| } |
| |
| var validFormats = [ |
| { format: 'RGBA', |
| type: 'UNSIGNED_BYTE', |
| channels: [0, 1, 2, 3], |
| bits: [8, 8, 8, 8], |
| mustBeFramebufferComplete: true |
| }, |
| { format: 'ALPHA', |
| type: 'UNSIGNED_BYTE', |
| channels: [-1, -1, -1, 3], |
| bits: [0, 0, 0, 8], |
| mustBeFramebufferComplete: false |
| }, |
| { format: 'RGB', |
| type: 'UNSIGNED_BYTE', |
| channels: [0, 1, 2, -1], |
| bits: [8, 8, 8, 0], |
| mustBeFramebufferComplete: false |
| }, |
| { format: 'RGB', |
| type: 'UNSIGNED_SHORT_5_6_5', |
| channels: [0, 1, 2, -1], |
| bits: [5, 6, 5, 0], |
| mustBeFramebufferComplete: false |
| }, |
| { format: 'RGBA', |
| type: 'UNSIGNED_SHORT_5_5_5_1', |
| channels: [0, 1, 2, 3], |
| bits: [5, 5, 5, 1], |
| mustBeFramebufferComplete: false |
| }, |
| { format: 'RGBA', |
| type: 'UNSIGNED_SHORT_4_4_4_4', |
| channels: [0, 1, 2, 3], |
| bits: [4, 4, 4, 4], |
| mustBeFramebufferComplete: false |
| }, |
| { format: 'LUMINANCE', |
| type: 'UNSIGNED_BYTE', |
| channels: [0, 0, 0, -1], |
| bits: [8, 8, 8, -1], |
| mustBeFramebufferComplete: false |
| }, |
| { format: 'LUMINANCE_ALPHA', |
| type: 'UNSIGNED_BYTE', |
| channels: [0, 0, 0, 3], |
| bits: [8, 8, 8, 8], |
| mustBeFramebufferComplete: false |
| } |
| ]; |
| |
| gl.clearColor(clearColor[0], clearColor[1], clearColor[2], clearColor[3]); |
| var fbo = gl.createFramebuffer(); |
| gl.bindFramebuffer(gl.FRAMEBUFFER, fbo); |
| var tex = gl.createTexture(); |
| gl.bindTexture(gl.TEXTURE_2D, tex); |
| gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE); |
| gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE); |
| gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR); |
| gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR); |
| gl.framebufferTexture2D( |
| gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex, 0); |
| |
| for (var ii = 0; ii < validFormats.length; ++ii) { |
| var info = validFormats[ii]; |
| testFormat(info); |
| } |
| |
| debug(""); |
| shouldBeTrue("numValidFormats > 0"); |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, "there should be no errors"); |
| } |
| |
| debug(""); |
| var successfullyParsed = true; |
| </script> |
| <script src="../../../js/js-test-post.js"></script> |
| |
| </body> |
| </html> |