framebuffer-texture-clear.html (3187B)
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 framebuffer clearColor with pure 0/1</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 <div id="console"></div> 19 <canvas id="canvas" width="2" height="2"> </canvas> 20 <script> 21 "use strict"; 22 // This test verifies a Mac Intel HD 6000/6100 driver bug. See crbug.com/710443. 23 var wtu = WebGLTestUtils; 24 var gl = wtu.create3DContext("canvas"); 25 26 function InitializeRGBAData(width, height) 27 { 28 var size = 4 * width * height; 29 var data = new Uint8Array(size); 30 for (var i = 0; i < size; i++) { 31 data[i] = 128; 32 } 33 return data; 34 } 35 36 function testFramebufferTextureClearWithPureZeroOrOne(clearColor, expectedColor) { 37 var width = 32; 38 var height = 32; 39 var texture0 = gl.createTexture(); 40 gl.bindTexture(gl.TEXTURE_2D, texture0); 41 // It seems that if we add texParameteri here, all cases can pass no matter 42 // you use texParameteri or not in Line 85. 43 // gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST); 44 var texData = InitializeRGBAData(width, height); 45 gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, width, height, 0, gl.RGBA, gl.UNSIGNED_BYTE, texData); 46 47 var fbo0 = gl.createFramebuffer(); 48 gl.bindFramebuffer(gl.FRAMEBUFFER, fbo0); 49 gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, texture0, 0); 50 gl.viewport(0, 0, width, height); 51 gl.clearColor(clearColor[0], clearColor[1], clearColor[2], clearColor[3]); 52 gl.clear(gl.COLOR_BUFFER_BIT); 53 54 var texture1 = gl.createTexture(); 55 gl.bindTexture(gl.TEXTURE_2D, texture1); 56 gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, width, height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null); 57 var fbo1 = gl.createFramebuffer(); 58 gl.bindFramebuffer(gl.FRAMEBUFFER, fbo1); 59 gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, texture1, 0); 60 61 wtu.setupTexturedQuad(gl); 62 63 gl.bindTexture(gl.TEXTURE_2D, texture0); 64 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST); 65 gl.bindFramebuffer(gl.FRAMEBUFFER, fbo1); 66 gl.viewport(0, 0, width, height); 67 gl.drawArrays(gl.TRIANGLES, 0, 6); 68 69 wtu.checkCanvasRect(gl, 0, 0, 1, 1, expectedColor); 70 71 gl.deleteTexture(texture0); 72 gl.deleteFramebuffer(fbo0); 73 gl.deleteTexture(texture1); 74 gl.deleteFramebuffer(fbo1); 75 } 76 77 description("Test that if clear fbo texture color with pure 0/1 and sample this texture to draw to another fbo, the final render color should be consistent with the clear color."); 78 79 for(var index = 0; index < 16; index++) 80 { 81 var r = (index & 8) / 8; 82 var g = (index & 4) / 4; 83 var b = (index & 2) / 2; 84 var a = index & 1; 85 var clearColor = [r, g, b, a]; 86 var expectedColor = [r * 255, g * 255, b * 255, a * 255]; 87 testFramebufferTextureClearWithPureZeroOrOne(clearColor, expectedColor); 88 } 89 90 debug(""); 91 var successfullyParsed = true; 92 93 </script> 94 <script src="../../js/js-test-post.js"></script> 95 96 </body> 97 </html>