framebuffer-completeness-draw-framebuffer.html (2586B)
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>Test draw framebuffer completeness when an incomplete framebuffer is bound to read framebuffer</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 <script> 20 // This exposes a bug in Chrome 67: If the read framebuffer is incomplete, then draw can fail even if the draw framebuffer is complete. 21 // http://anglebug.com/2737 22 23 "use strict"; 24 description(); 25 26 var wtu = WebGLTestUtils; 27 var gl = wtu.create3DContext(undefined, undefined, 2); 28 if (!gl) { 29 testFailed("context does not exist"); 30 } else { 31 testPassed("context exists"); 32 33 var incompleteFb = gl.createFramebuffer(); 34 gl.bindFramebuffer(gl.FRAMEBUFFER, incompleteFb); 35 var incompleteTex = gl.createTexture(); 36 gl.bindTexture(gl.TEXTURE_2D, incompleteTex); 37 gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, incompleteTex, 0); 38 shouldBe('gl.checkFramebufferStatus(gl.FRAMEBUFFER)', 'gl.FRAMEBUFFER_INCOMPLETE_ATTACHMENT'); 39 40 wtu.setupUnitQuad(gl, 0, 1); 41 42 var testProgram = wtu.setupSimpleColorProgram(gl, 0); 43 44 // If this is changed to gl.FRAMEBUFFER, the rendering succeeds on Chrome 67. 45 var drawFbTarget = gl.DRAW_FRAMEBUFFER; 46 47 var completeFb = gl.createFramebuffer(); 48 gl.bindFramebuffer(drawFbTarget, completeFb); 49 var completeTex = gl.createTexture(); 50 gl.bindTexture(gl.TEXTURE_2D, completeTex); 51 gl.texStorage2D(gl.TEXTURE_2D, 1, gl.RGBA8, 128, 128); 52 gl.framebufferTexture2D(drawFbTarget, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, completeTex, 0); 53 wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no error after setup"); 54 55 shouldBe('gl.checkFramebufferStatus(gl.READ_FRAMEBUFFER)', 'gl.FRAMEBUFFER_INCOMPLETE_ATTACHMENT'); 56 shouldBe('gl.checkFramebufferStatus(gl.DRAW_FRAMEBUFFER)', 'gl.FRAMEBUFFER_COMPLETE'); 57 58 gl.viewport(0, 0, 128, 128); 59 gl.uniform4f(gl.getUniformLocation(testProgram, 'u_color'), 0, 1, 0, 1); 60 wtu.drawUnitQuad(gl); 61 62 wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no error after draw"); 63 gl.bindFramebuffer(gl.READ_FRAMEBUFFER, completeFb); 64 wtu.checkCanvasRect(gl, 0, 0, 128, 128, [0, 255, 0, 255], 'should be green', 2); 65 } 66 67 debug(""); 68 var successfullyParsed = true; 69 70 </script> 71 <script src="../../js/js-test-post.js"></script> 72 73 </body> 74 </html>