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| |
| <!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> |