Index: conformance/extensions/oes-standard-derivatives.html |
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+<!-- |
+ |
+/* |
+** Copyright (c) 2012 The Khronos Group Inc. |
+** |
+** Permission is hereby granted, free of charge, to any person obtaining a |
+** copy of this software and/or associated documentation files (the |
+** "Materials"), to deal in the Materials without restriction, including |
+** without limitation the rights to use, copy, modify, merge, publish, |
+** distribute, sublicense, and/or sell copies of the Materials, and to |
+** permit persons to whom the Materials are furnished to do so, subject to |
+** the following conditions: |
+** |
+** The above copyright notice and this permission notice shall be included |
+** in all copies or substantial portions of the Materials. |
+** |
+** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
+** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
+** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
+** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
+** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
+** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS. |
+*/ |
+ |
+--> |
+ |
+<!DOCTYPE html> |
+<html> |
+<head> |
+<meta charset="utf-8"> |
+<title>WebGL OES_standard_derivatives Conformance Tests</title> |
+<link rel="stylesheet" href="../../resources/js-test-style.css"/> |
+<script src="../../resources/desktop-gl-constants.js" type="text/javascript"></script> |
+<script src="../../resources/js-test-pre.js"></script> |
+<script src="../resources/webgl-test.js"></script> |
+<script src="../resources/webgl-test-utils.js"></script> |
+</head> |
+<body> |
+<div id="description"></div> |
+<canvas id="canvas" style="width: 50px; height: 50px;"> </canvas> |
+<div id="console"></div> |
+<!-- Shaders for testing standard derivatives --> |
+ |
+<!-- Shader omitting the required #extension pragma --> |
+<script id="missingPragmaFragmentShader" type="x-shader/x-fragment"> |
+precision mediump float; |
+varying vec2 texCoord; |
+void main() { |
+ float dx = dFdx(texCoord.x); |
+ float dy = dFdy(texCoord.y); |
+ float w = fwidth(texCoord.x); |
+ gl_FragColor = vec4(dx, dy, w, 1.0); |
+} |
+</script> |
+ |
+<!-- Shader to test macro definition --> |
+<script id="macroFragmentShader" type="x-shader/x-fragment"> |
+precision mediump float; |
+void main() { |
+#ifdef GL_OES_standard_derivatives |
+ gl_FragColor = vec4(0.0, 0.0, 0.0, 0.0); |
+#else |
+ // Error expected |
+ #error no GL_OES_standard_derivatives; |
+#endif |
+} |
+</script> |
+ |
+<!-- Shader with required #extension pragma --> |
+<script id="testFragmentShader" type="x-shader/x-fragment"> |
+#extension GL_OES_standard_derivatives : enable |
+precision mediump float; |
+varying vec2 texCoord; |
+void main() { |
+ float dx = dFdx(texCoord.x); |
+ float dy = dFdy(texCoord.y); |
+ float w = fwidth(texCoord.x); |
+ gl_FragColor = vec4(dx, dy, w, 1.0); |
+} |
+</script> |
+<!-- Shaders to link with test fragment shaders --> |
+<script id="goodVertexShader" type="x-shader/x-vertex"> |
+attribute vec4 vPosition; |
+varying vec2 texCoord; |
+void main() { |
+ texCoord = vPosition.xy; |
+ gl_Position = vPosition; |
+} |
+</script> |
+<!-- Shaders to test output --> |
+<script id="outputVertexShader" type="x-shader/x-vertex"> |
+attribute vec4 vPosition; |
+varying vec4 position; |
+void main() { |
+ position = vPosition; |
+ gl_Position = vPosition; |
+} |
+</script> |
+<script id="outputFragmentShader" type="x-shader/x-fragment"> |
+#extension GL_OES_standard_derivatives : enable |
+precision mediump float; |
+varying vec4 position; |
+void main() { |
+ float dzdx = dFdx(position.z); |
+ float dzdy = dFdy(position.z); |
+ float fw = fwidth(position.z); |
+ gl_FragColor = vec4(abs(dzdx) * 40.0, abs(dzdy) * 40.0, fw * 40.0, 1.0); |
+} |
+</script> |
+ |
+<script> |
+"use strict"; |
+description("This test verifies the functionality of the OES_standard_derivatives extension, if it is available."); |
+ |
+debug(""); |
+ |
+var wtu = WebGLTestUtils; |
+var canvas = document.getElementById("canvas"); |
+var gl = wtu.create3DContext(canvas); |
+var ext = null; |
+ |
+if (!gl) { |
+ testFailed("WebGL context does not exist"); |
+} else { |
+ testPassed("WebGL context exists"); |
+ |
+ // Run tests with extension disabled |
+ runHintTestDisabled(); |
+ runShaderTests(false); |
+ |
+ // Query the extension and store globally so shouldBe can access it |
+ ext = gl.getExtension("OES_standard_derivatives"); |
+ if (!ext) { |
+ testPassed("No OES_standard_derivatives support -- this is legal"); |
+ |
+ runSupportedTest(false); |
+ } else { |
+ testPassed("Successfully enabled OES_standard_derivatives extension"); |
+ |
+ runSupportedTest(true); |
+ |
+ runHintTestEnabled(); |
+ runShaderTests(true); |
+ runOutputTests(); |
+ runUniqueObjectTest(); |
+ } |
+} |
+ |
+function runSupportedTest(extensionEnabled) { |
+ var supported = gl.getSupportedExtensions(); |
+ if (supported.indexOf("OES_standard_derivatives") >= 0) { |
+ if (extensionEnabled) { |
+ testPassed("OES_standard_derivatives listed as supported and getExtension succeeded"); |
+ } else { |
+ testFailed("OES_standard_derivatives listed as supported but getExtension failed"); |
+ } |
+ } else { |
+ if (extensionEnabled) { |
+ testFailed("OES_standard_derivatives not listed as supported but getExtension succeeded"); |
+ } else { |
+ testPassed("OES_standard_derivatives not listed as supported and getExtension failed -- this is legal"); |
+ } |
+ } |
+} |
+ |
+function runHintTestDisabled() { |
+ debug("Testing FRAGMENT_SHADER_DERIVATIVE_HINT_OES with extension disabled"); |
+ |
+ // Use the constant directly as we don't have the extension |
+ var FRAGMENT_SHADER_DERIVATIVE_HINT_OES = 0x8B8B; |
+ |
+ gl.getParameter(FRAGMENT_SHADER_DERIVATIVE_HINT_OES); |
+ glErrorShouldBe(gl, gl.INVALID_ENUM, "FRAGMENT_SHADER_DERIVATIVE_HINT_OES should not be queryable if extension is disabled"); |
+ |
+ gl.hint(FRAGMENT_SHADER_DERIVATIVE_HINT_OES, gl.DONT_CARE); |
+ glErrorShouldBe(gl, gl.INVALID_ENUM, "hint should not accept FRAGMENT_SHADER_DERIVATIVE_HINT_OES if extension is disabled"); |
+} |
+ |
+function runHintTestEnabled() { |
+ debug("Testing FRAGMENT_SHADER_DERIVATIVE_HINT_OES with extension enabled"); |
+ |
+ shouldBe("ext.FRAGMENT_SHADER_DERIVATIVE_HINT_OES", "0x8B8B"); |
+ |
+ gl.getParameter(ext.FRAGMENT_SHADER_DERIVATIVE_HINT_OES); |
+ glErrorShouldBe(gl, gl.NO_ERROR, "FRAGMENT_SHADER_DERIVATIVE_HINT_OES query should succeed if extension is enabled"); |
+ |
+ // Default value is DONT_CARE |
+ if (gl.getParameter(ext.FRAGMENT_SHADER_DERIVATIVE_HINT_OES) == gl.DONT_CARE) { |
+ testPassed("Default value of FRAGMENT_SHADER_DERIVATIVE_HINT_OES is DONT_CARE"); |
+ } else { |
+ testFailed("Default value of FRAGMENT_SHADER_DERIVATIVE_HINT_OES is not DONT_CARE"); |
+ } |
+ |
+ // Ensure that we can set the target |
+ gl.hint(ext.FRAGMENT_SHADER_DERIVATIVE_HINT_OES, gl.DONT_CARE); |
+ glErrorShouldBe(gl, gl.NO_ERROR, "hint should accept FRAGMENT_SHADER_DERIVATIVE_HINT_OES"); |
+ |
+ // Test all the hint modes |
+ var validModes = ["FASTEST", "NICEST", "DONT_CARE"]; |
+ var anyFailed = false; |
+ for (var n = 0; n < validModes.length; n++) { |
+ var mode = validModes[n]; |
+ gl.hint(ext.FRAGMENT_SHADER_DERIVATIVE_HINT_OES, gl[mode]); |
+ if (gl.getParameter(ext.FRAGMENT_SHADER_DERIVATIVE_HINT_OES) != gl[mode]) { |
+ testFailed("Round-trip of hint()/getParameter() failed on mode " + mode); |
+ anyFailed = true; |
+ } |
+ } |
+ if (!anyFailed) { |
+ testPassed("Round-trip of hint()/getParameter() with all supported modes"); |
+ } |
+} |
+ |
+function runShaderTests(extensionEnabled) { |
+ debug(""); |
+ debug("Testing various shader compiles with extension " + (extensionEnabled ? "enabled" : "disabled")); |
+ |
+ // Expect the macro shader to succeed ONLY if enabled |
+ var macroFragmentProgram = wtu.loadProgramFromScriptExpectError(gl, "goodVertexShader", "macroFragmentShader"); |
+ if (extensionEnabled) { |
+ if (macroFragmentProgram) { |
+ // Expected result |
+ testPassed("GL_OES_standard_derivatives defined in shaders when extension is enabled"); |
+ } else { |
+ testFailed("GL_OES_standard_derivatives not defined in shaders when extension is enabled"); |
+ } |
+ } else { |
+ if (macroFragmentProgram) { |
+ testFailed("GL_OES_standard_derivatives defined in shaders when extension is disabled"); |
+ } else { |
+ testPassed("GL_OES_standard_derivatives not defined in shaders when extension disabled"); |
+ } |
+ } |
+ |
+ // Always expect the shader missing the #pragma to fail (whether enabled or not) |
+ var missingPragmaFragmentProgram = wtu.loadProgramFromScriptExpectError(gl, "goodVertexShader", "missingPragmaFragmentShader"); |
+ if (missingPragmaFragmentProgram) { |
+ testFailed("Shader built-ins allowed without #extension pragma"); |
+ } else { |
+ testPassed("Shader built-ins disallowed without #extension pragma"); |
+ } |
+ |
+ // Try to compile a shader using the built-ins that should only succeed if enabled |
+ var testFragmentProgram = wtu.loadProgramFromScriptExpectError(gl, "goodVertexShader", "testFragmentShader"); |
+ if (extensionEnabled) { |
+ if (testFragmentProgram) { |
+ testPassed("Shader built-ins compiled successfully when extension enabled"); |
+ } else { |
+ testFailed("Shader built-ins failed to compile when extension enabled"); |
+ } |
+ } else { |
+ if (testFragmentProgram) { |
+ testFailed("Shader built-ins compiled successfully when extension disabled"); |
+ } else { |
+ testPassed("Shader built-ins failed to compile when extension disabled"); |
+ } |
+ } |
+} |
+ |
+function runOutputTests() { |
+ // This tests does several draws with various values of z. |
+ // The output of the fragment shader is: |
+ // [dFdx(z), dFdy(z), fwidth(z), 1.0] |
+ // The expected math: (note the conversion to uint8) |
+ // canvas.width = canvas.height = 50 |
+ // dFdx = totalChange.x / canvas.width = 0.5 / 50.0 = 0.01 |
+ // dFdy = totalChange.y / canvas.height = 0.5 / 50.0 = 0.01 |
+ // fw = abs(dFdx + dFdy) = 0.01 + 0.01 = 0.02 |
+ // r = floor(dFdx * 40.0 * 255) = 102 |
+ // g = floor(dFdy * 40.0 * 255) = 102 |
+ // b = floor(fw * 40.0 * 255) = 204 |
+ |
+ var e = 5; // Amount of variance to allow in result pixels - may need to be tweaked higher |
+ |
+ debug("Testing various draws for valid built-in function behavior"); |
+ |
+ canvas.width = 50; canvas.height = 50; |
+ gl.viewport(0, 0, canvas.width, canvas.height); |
+ gl.hint(ext.FRAGMENT_SHADER_DERIVATIVE_HINT_OES, gl.NICEST); |
+ |
+ var positionLoc = 0; |
+ var texcoordLoc = 1; |
+ var program = wtu.setupProgram(gl, ["outputVertexShader", "outputFragmentShader"], ['vPosition', 'texCoord0'], [0, 1]); |
+ var quadParameters = wtu.setupUnitQuad(gl, positionLoc, texcoordLoc); |
+ |
+ function readLocation(x, y) { |
+ var pixels = new Uint8Array(1 * 1 * 4); |
+ var px = Math.floor(x * canvas.width); |
+ var py = Math.floor(y * canvas.height); |
+ gl.readPixels(px, py, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, pixels); |
+ return pixels; |
+ }; |
+ function toString(arr) { |
+ var s = "["; |
+ for (var n = 0; n < arr.length; n++) { |
+ s += arr[n]; |
+ if (n < arr.length - 1) { |
+ s += ", "; |
+ } |
+ } |
+ return s + "]"; |
+ }; |
+ function expectResult(target, successMessage, failureMessage) { |
+ var locations = [ |
+ readLocation(0.1, 0.1), |
+ readLocation(0.9, 0.1), |
+ readLocation(0.1, 0.9), |
+ readLocation(0.9, 0.9), |
+ readLocation(0.5, 0.5) |
+ ]; |
+ var anyDiffer = false; |
+ for (var n = 0; n < locations.length; n++) { |
+ var source = locations[n]; |
+ for (var m = 0; m < 4; m++) { |
+ if (Math.abs(source[m] - target[m]) > e) { |
+ anyDiffer = true; |
+ testFailed(failureMessage + "; should be " + toString(target) + ", was " + toString(source)); |
+ break; |
+ } |
+ } |
+ } |
+ if (!anyDiffer) { |
+ testPassed(successMessage); |
+ } |
+ }; |
+ |
+ function setupBuffers(tl, tr, bl, br) { |
+ gl.bindBuffer(gl.ARRAY_BUFFER, quadParameters[0]); |
+ gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ |
+ 1.0, 1.0, tr, |
+ -1.0, 1.0, tl, |
+ -1.0, -1.0, bl, |
+ 1.0, 1.0, tr, |
+ -1.0, -1.0, bl, |
+ 1.0, -1.0, br]), gl.STATIC_DRAW); |
+ gl.vertexAttribPointer(positionLoc, 3, gl.FLOAT, false, 0, 0); |
+ }; |
+ |
+ // Draw 1: (no variation) |
+ setupBuffers(0.0, 0.0, 0.0, 0.0); |
+ wtu.clearAndDrawUnitQuad(gl); |
+ expectResult([0, 0, 0, 255], |
+ "Draw 1 (no variation) returned the correct data", |
+ "Draw 1 (no variation) returned incorrect data"); |
+ |
+ // Draw 2: (variation in x) |
+ setupBuffers(1.0, 0.0, 1.0, 0.0); |
+ wtu.clearAndDrawUnitQuad(gl); |
+ expectResult([204, 0, 204, 255], |
+ "Draw 2 (variation in x) returned the correct data", |
+ "Draw 2 (variation in x) returned incorrect data"); |
+ |
+ // Draw 3: (variation in y) |
+ setupBuffers(1.0, 1.0, 0.0, 0.0); |
+ wtu.clearAndDrawUnitQuad(gl); |
+ expectResult([0, 204, 204, 255], |
+ "Draw 3 (variation in y) returned the correct data", |
+ "Draw 3 (variation in y) returned incorrect data"); |
+ |
+ // Draw 4: (variation in x & y) |
+ setupBuffers(1.0, 0.5, 0.5, 0.0); |
+ wtu.clearAndDrawUnitQuad(gl); |
+ expectResult([102, 102, 204, 255], |
+ "Draw 4 (variation in x & y) returned the correct data", |
+ "Draw 4 (variation in x & y) returned incorrect data"); |
+ |
+} |
+ |
+function runUniqueObjectTest() |
+{ |
+ debug("Testing that getExtension() returns the same object each time"); |
+ gl.getExtension("OES_standard_derivatives").myProperty = 2; |
+ gc(); |
+ shouldBe('gl.getExtension("OES_standard_derivatives").myProperty', '2'); |
+} |
+ |
+debug(""); |
+var successfullyParsed = true; |
+</script> |
+<script src="../../resources/js-test-post.js"></script> |
+ |
+</body> |
+</html> |
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+LF |
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