ext-blend-minmax.html (7478B)
1 <!-- 2 Copyright (c) 2019 The Khronos Group Inc. 3 Use of this source code is governed by an MIT-style license that can be 4 found in the LICENSE.txt file. 5 --> 6 7 <!DOCTYPE html> 8 <html> 9 <head> 10 <meta charset="utf-8"> 11 <title>WebGL EXT_blend_minmax Conformance Tests</title> 12 <link rel="stylesheet" href="../../resources/js-test-style.css"/> 13 <script src="../../js/js-test-pre.js"></script> 14 <script src="../../js/webgl-test-utils.js"></script> 15 </head> 16 <body> 17 <div id="description"></div> 18 <canvas id="canvas" style="width: 50px; height: 50px;"> </canvas> 19 <div id="console"></div> 20 <!-- Shaders to test output --> 21 <script id="outputVertexShader" type="x-shader/x-vertex"> 22 attribute vec4 vPosition; 23 void main() { 24 gl_Position = vPosition; 25 } 26 </script> 27 <script id="outputFragmentShader" type="x-shader/x-fragment"> 28 precision mediump float; 29 uniform vec4 uColor; 30 void main() { 31 gl_FragColor = uColor; 32 } 33 </script> 34 35 <script> 36 "use strict"; 37 description("This test verifies the functionality of the EXT_blend_minmax extension, if it is available."); 38 39 debug(""); 40 41 var wtu = WebGLTestUtils; 42 var canvas = document.getElementById("canvas"); 43 var gl = wtu.create3DContext(canvas); 44 var ext = null; 45 46 // Use the constant directly when we don't have the extension 47 var MIN_EXT = 0x8007; 48 var MAX_EXT = 0x8008; 49 50 if (!gl) { 51 testFailed("WebGL context does not exist"); 52 } else { 53 testPassed("WebGL context exists"); 54 55 runBlendTestDisabled(); 56 57 // Query the extension and store globally so shouldBe can access it 58 ext = wtu.getExtensionWithKnownPrefixes(gl, "EXT_blend_minmax"); 59 if (!ext) { 60 testPassed("No EXT_blend_minmax support -- this is legal"); 61 62 runSupportedTest(false); 63 } else { 64 debug(""); 65 testPassed("Successfully enabled EXT_blend_minmax extension"); 66 67 runSupportedTest(true); 68 69 runBlendTestEnabled(); 70 runOutputTests(); 71 runUniqueObjectTest(); 72 } 73 } 74 75 function runSupportedTest(extensionEnabled) { 76 var supported = gl.getSupportedExtensions(); 77 if (supported.indexOf("EXT_blend_minmax") >= 0) { 78 if (extensionEnabled) { 79 testPassed("EXT_blend_minmax listed as supported and getExtension succeeded"); 80 } else { 81 testFailed("EXT_blend_minmax listed as supported but getExtension failed"); 82 } 83 } else { 84 if (extensionEnabled) { 85 testFailed("EXT_blend_minmax not listed as supported but getExtension succeeded"); 86 } else { 87 testPassed("EXT_blend_minmax not listed as supported and getExtension failed -- this is legal"); 88 } 89 } 90 } 91 92 function runBlendTestDisabled() { 93 debug(""); 94 debug("Testing blending enums with extension disabled"); 95 96 // Set the blend equation to a known-good enum first 97 gl.blendEquation(gl.FUNC_ADD); 98 99 wtu.shouldGenerateGLError(gl, gl.INVALID_ENUM, "gl.blendEquation(MIN_EXT)"); 100 shouldBe("gl.getParameter(gl.BLEND_EQUATION)", "gl.FUNC_ADD"); 101 102 wtu.shouldGenerateGLError(gl, gl.INVALID_ENUM, "gl.blendEquation(MAX_EXT)"); 103 shouldBe("gl.getParameter(gl.BLEND_EQUATION)", "gl.FUNC_ADD"); 104 105 wtu.shouldGenerateGLError(gl, gl.INVALID_ENUM, "gl.blendEquationSeparate(MIN_EXT, gl.FUNC_ADD)"); 106 shouldBe("gl.getParameter(gl.BLEND_EQUATION_RGB)", "gl.FUNC_ADD"); 107 108 wtu.shouldGenerateGLError(gl, gl.INVALID_ENUM, "gl.blendEquationSeparate(gl.FUNC_ADD, MIN_EXT)"); 109 shouldBe("gl.getParameter(gl.BLEND_EQUATION_ALPHA)", "gl.FUNC_ADD"); 110 111 wtu.shouldGenerateGLError(gl, gl.INVALID_ENUM, "gl.blendEquationSeparate(MAX_EXT, gl.FUNC_ADD)"); 112 shouldBe("gl.getParameter(gl.BLEND_EQUATION_RGB)", "gl.FUNC_ADD"); 113 114 wtu.shouldGenerateGLError(gl, gl.INVALID_ENUM, "gl.blendEquationSeparate(gl.FUNC_ADD, MAX_EXT)"); 115 shouldBe("gl.getParameter(gl.BLEND_EQUATION_ALPHA)", "gl.FUNC_ADD"); 116 } 117 118 function runBlendTestEnabled() { 119 debug(""); 120 debug("Testing blending enums with extension enabled"); 121 122 shouldBe("ext.MIN_EXT", "0x8007"); 123 shouldBe("ext.MAX_EXT", "0x8008"); 124 125 wtu.shouldGenerateGLError(gl, gl.NO_ERROR, "gl.blendEquation(ext.MIN_EXT)"); 126 shouldBe("gl.getParameter(gl.BLEND_EQUATION)", "ext.MIN_EXT"); 127 128 wtu.shouldGenerateGLError(gl, gl.NO_ERROR, "gl.blendEquation(ext.MAX_EXT)"); 129 shouldBe("gl.getParameter(gl.BLEND_EQUATION)", "ext.MAX_EXT"); 130 131 wtu.shouldGenerateGLError(gl, gl.NO_ERROR, "gl.blendEquationSeparate(ext.MIN_EXT, gl.FUNC_ADD)"); 132 shouldBe("gl.getParameter(gl.BLEND_EQUATION_RGB)", "ext.MIN_EXT"); 133 shouldBe("gl.getParameter(gl.BLEND_EQUATION_ALPHA)", "gl.FUNC_ADD"); 134 135 wtu.shouldGenerateGLError(gl, gl.NO_ERROR, "gl.blendEquationSeparate(gl.FUNC_ADD, ext.MIN_EXT)"); 136 shouldBe("gl.getParameter(gl.BLEND_EQUATION_RGB)", "gl.FUNC_ADD"); 137 shouldBe("gl.getParameter(gl.BLEND_EQUATION_ALPHA)", "ext.MIN_EXT"); 138 139 wtu.shouldGenerateGLError(gl, gl.NO_ERROR, "gl.blendEquationSeparate(ext.MAX_EXT, gl.FUNC_ADD)"); 140 shouldBe("gl.getParameter(gl.BLEND_EQUATION_RGB)", "ext.MAX_EXT"); 141 shouldBe("gl.getParameter(gl.BLEND_EQUATION_ALPHA)", "gl.FUNC_ADD"); 142 143 wtu.shouldGenerateGLError(gl, gl.NO_ERROR, "gl.blendEquationSeparate(gl.FUNC_ADD, ext.MAX_EXT)"); 144 shouldBe("gl.getParameter(gl.BLEND_EQUATION_RGB)", "gl.FUNC_ADD"); 145 shouldBe("gl.getParameter(gl.BLEND_EQUATION_ALPHA)", "ext.MAX_EXT"); 146 } 147 148 function runOutputTests() { 149 var e = 2; // Amount of variance to allow in result pixels - may need to be tweaked higher 150 151 debug(""); 152 debug("Testing various draws for valid blending behavior"); 153 154 canvas.width = 50; canvas.height = 50; 155 gl.viewport(0, 0, canvas.width, canvas.height); 156 gl.enable(gl.BLEND); 157 gl.blendFunc(gl.ONE, gl.ONE); 158 159 var program = wtu.setupProgram(gl, ["outputVertexShader", "outputFragmentShader"], ['vPosition'], [0]); 160 var quadParameters = wtu.setupUnitQuad(gl, 0, 1); 161 var colorUniform = gl.getUniformLocation(program, "uColor"); 162 163 164 // Draw 1 165 gl.blendEquation(ext.MIN_EXT); 166 167 gl.clearColor(0.2, 0.4, 0.6, 0.8); 168 gl.clear(gl.COLOR_BUFFER_BIT); 169 170 gl.uniform4f(colorUniform, 0.8, 0.6, 0.4, 0.2); 171 wtu.drawUnitQuad(gl); 172 173 wtu.checkCanvasRect(gl, 0, 0, canvas.width, canvas.height, [51, 102, 102, 51]); 174 175 // Draw 2: 176 gl.blendEquation(ext.MAX_EXT); 177 178 gl.clearColor(0.2, 0.4, 0.6, 0.8); 179 gl.clear(gl.COLOR_BUFFER_BIT); 180 181 gl.uniform4f(colorUniform, 0.8, 0.6, 0.4, 0.2); 182 wtu.drawUnitQuad(gl); 183 184 wtu.checkCanvasRect(gl, 0, 0, canvas.width, canvas.height, [204, 153, 153, 204]); 185 186 // Draw 3 187 gl.blendEquationSeparate(ext.MIN_EXT, ext.MAX_EXT); 188 189 gl.clearColor(0.2, 0.4, 0.6, 0.8); 190 gl.clear(gl.COLOR_BUFFER_BIT); 191 192 gl.uniform4f(colorUniform, 0.8, 0.6, 0.4, 0.2); 193 wtu.drawUnitQuad(gl); 194 195 wtu.checkCanvasRect(gl, 0, 0, canvas.width, canvas.height, [51, 102, 102, 204]); 196 197 // Draw 4 198 gl.blendEquationSeparate(ext.MAX_EXT, ext.MIN_EXT); 199 200 gl.clearColor(0.2, 0.4, 0.6, 0.8); 201 gl.clear(gl.COLOR_BUFFER_BIT); 202 203 gl.uniform4f(colorUniform, 0.8, 0.6, 0.4, 0.2); 204 wtu.drawUnitQuad(gl); 205 206 wtu.checkCanvasRect(gl, 0, 0, canvas.width, canvas.height, [204, 153, 153, 51]); 207 } 208 209 function runUniqueObjectTest() 210 { 211 debug(""); 212 debug("Testing that getExtension() returns the same object each time"); 213 ext = null; 214 gl.getExtension("EXT_blend_minmax").myProperty = 2; 215 webglHarnessCollectGarbage(); 216 shouldBe('gl.getExtension("EXT_blend_minmax").myProperty', '2'); 217 } 218 219 debug(""); 220 var successfullyParsed = true; 221 </script> 222 <script src="../../js/js-test-post.js"></script> 223 224 </body> 225 </html>