multisampled-stencil-renderbuffer-initialization.html (6731B)
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 <link rel="stylesheet" href="../../resources/js-test-style.css"/> 12 <script src="../../js/js-test-pre.js"></script> 13 <script src="../../js/webgl-test-utils.js"></script> 14 </head> 15 <body> 16 <canvas id="testbed" width="40" height="40" style="width: 40px; height: 40px;"></canvas> 17 <div id="description"></div> 18 <div id="console"></div> 19 <script> 20 "use strict"; 21 var wtu = WebGLTestUtils; 22 description('Verify multisampled stencil renderbuffers are initialized to 0 before being read in WebGL'); 23 24 var gl = wtu.create3DContext("testbed", null, 2); 25 26 if (!gl) { 27 testFailed('canvas.getContext() failed'); 28 } else { 29 // Set the clear color to green. It should never show up. 30 gl.clearColor(0, 1, 0, 1); 31 gl.disable(gl.DEPTH_TEST); 32 33 let c = gl.canvas; 34 var maxSamples = gl.getInternalformatParameter( 35 gl.RENDERBUFFER, gl.RGBA8, gl.SAMPLES)[0]; 36 for (let i = 0; i < 2; ++i) { 37 // Non-multisampled tests 38 runTest(gl, {alloc1: {w: c.width, h: c.height, s: 0}, alloc2: null}); 39 runTest(gl, {alloc1: null, alloc2: {w: c.width, h: c.height, s: 0}}); 40 // Multisampled tests 41 runTest(gl, {alloc1: {w: c.width, h: c.height, s: maxSamples}, alloc2: null}); 42 runTest(gl, {alloc1: null, alloc2: {w: c.width, h: c.height, s: maxSamples}}); 43 44 // Tests for initially allocating at the wrong size. 45 // This is caused by a Qualcomm driver bug: http://crbug.com/696126 46 runTest(gl, {alloc1: {w: 5, h: 5, s: maxSamples}, alloc2: {w: c.width, h: c.height, s: maxSamples}}); 47 } 48 49 // Testing buffer clearing won't change the clear values. 50 var clearColor = gl.getParameter(gl.COLOR_CLEAR_VALUE); 51 shouldBe("clearColor", "[0, 1, 0, 1]"); 52 wtu.glErrorShouldBe(gl, gl.NO_ERROR, 'should be no errors'); 53 } 54 55 function runTest(gl, params) { 56 debug("Test for stencil buffer: " + JSON.stringify(params)); 57 let resolve = params.alloc2 ? params.alloc2 : params.alloc1; 58 gl.viewport(0, 0, resolve.w, resolve.h); 59 wtu.checkCanvasRect(gl, 0, 0, resolve.w, resolve.h, 60 [0, 0, 0, 0], 61 "internal buffers have been initialized to 0"); 62 63 gl.disable(gl.STENCIL_TEST); 64 65 // fill the back buffer so we know that reading below happens from 66 // the renderbuffer. 67 gl.clearStencil(2); 68 gl.clear(gl.COLOR_BUFFER_BIT | gl.STENCIL_BUFFER_BIT); 69 70 // Set up (color+stencil) non-multisampled buffer to blit to and read back from. 71 var fbo = gl.createFramebuffer(); 72 gl.bindFramebuffer(gl.FRAMEBUFFER, fbo); 73 var buffer = gl.createRenderbuffer(); 74 gl.bindRenderbuffer(gl.RENDERBUFFER, buffer); 75 gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA8, resolve.w, resolve.h); 76 gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, buffer); 77 var stencilBuffer = gl.createRenderbuffer(); 78 gl.bindRenderbuffer(gl.RENDERBUFFER, stencilBuffer); 79 gl.renderbufferStorage(gl.RENDERBUFFER, gl.STENCIL_INDEX8, resolve.w, resolve.h); 80 gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.STENCIL_ATTACHMENT, gl.RENDERBUFFER, stencilBuffer); 81 if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) { 82 debug("Skip: framebuffer is allowed to be incomplete."); 83 return; 84 } 85 wtu.glErrorShouldBe(gl, gl.NO_ERROR, 'should be no errors'); 86 gl.clearStencil(2); 87 gl.clear(gl.COLOR_BUFFER_BIT | gl.STENCIL_BUFFER_BIT); 88 wtu.checkCanvasRect(gl, 0, 0, resolve.w, resolve.h, 89 [0, 255, 0, 255], 90 "user buffer has been cleared to green"); 91 92 // Set up (stencil-only) multisampled buffer to test. 93 var fbo_m = gl.createFramebuffer(); 94 gl.bindFramebuffer(gl.FRAMEBUFFER, fbo_m); 95 var buffer_m = gl.createRenderbuffer(); 96 gl.bindRenderbuffer(gl.RENDERBUFFER, buffer_m); 97 98 if (params.alloc1) { 99 allocStorage(params.alloc1.w, params.alloc1.h, params.alloc1.s); 100 } 101 gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.STENCIL_ATTACHMENT, gl.RENDERBUFFER, buffer_m); 102 if (params.alloc2) { 103 if (params.alloc1) { 104 if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) { 105 debug("Skip: framebuffer is allowed to be incomplete."); 106 return; 107 } 108 // Clear the FBO in order to make sure framebufferRenderbuffer is 109 // committed. (In Firefox, framebufferRenderbuffer is deferred, so this 110 // is needed to trigger the bug.) 111 gl.clear(gl.COLOR_BUFFER_BIT | gl.STENCIL_BUFFER_BIT); 112 } 113 allocStorage(params.alloc2.w, params.alloc2.h, params.alloc2.s); 114 } 115 116 function allocStorage(width, height, samples) { 117 gl.renderbufferStorageMultisample( 118 gl.RENDERBUFFER, samples, gl.STENCIL_INDEX8, width, height); 119 wtu.glErrorShouldBe(gl, gl.NO_ERROR, 120 "should be no error after renderbufferStorageMultisample(STENCIL_INDEX8)."); 121 } 122 123 if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) { 124 debug("Skip: framebuffer is allowed to be incomplete."); 125 return; 126 } 127 wtu.glErrorShouldBe(gl, gl.NO_ERROR, 'should be no errors'); 128 129 // Blit from multisampled buffer to non-multisampled buffer. 130 gl.bindFramebuffer(gl.READ_FRAMEBUFFER, fbo_m); 131 gl.bindFramebuffer(gl.DRAW_FRAMEBUFFER, fbo); 132 gl.clearStencil(2); 133 gl.clear(gl.STENCIL_BUFFER_BIT); 134 // Blit stencil from fbo_m (should be default value of 0) to fbo (should be 2). 135 gl.blitFramebuffer(0, 0, resolve.w, resolve.h, 136 0, 0, resolve.w, resolve.h, 137 gl.STENCIL_BUFFER_BIT, gl.NEAREST); 138 // fbo stencil should now be 0. 139 wtu.glErrorShouldBe(gl, gl.NO_ERROR, 'should be no errors'); 140 141 gl.bindFramebuffer(gl.FRAMEBUFFER, fbo); 142 // Draw a blue quad (with stencil = 1) (should pass the stencil test: 1 > 0) 143 gl.stencilFunc(gl.GREATER, 1, 0xffffffff); 144 gl.enable(gl.STENCIL_TEST); 145 wtu.setupColorQuad(gl); 146 wtu.setFloatDrawColor(gl, [0, 0, 1, 1]); 147 wtu.drawUnitQuad(gl); 148 wtu.checkCanvasRect(gl, 0, 0, resolve.w, resolve.h, 149 [0, 0, 255, 255]); 150 151 gl.deleteFramebuffer(fbo_m); 152 gl.deleteRenderbuffer(buffer_m); 153 gl.deleteFramebuffer(fbo); 154 gl.deleteRenderbuffer(buffer); 155 156 gl.canvas.width += 1; 157 gl.canvas.height += 1; 158 159 wtu.glErrorShouldBe(gl, gl.NO_ERROR, 'should be no errors'); 160 debug(''); 161 } 162 163 var successfullyParsed = true; 164 </script> 165 <script src="../../js/js-test-post.js"></script> 166 </body> 167 </html>