| <!-- |
| Copyright (c) 2019 The Khronos Group Inc. |
| Use of this source code is governed by an MIT-style license that can be |
| found in the LICENSE.txt file. |
| --> |
| |
| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <link rel="stylesheet" href="../../resources/js-test-style.css"/> |
| <script src="../../js/js-test-pre.js"></script> |
| <script src="../../js/webgl-test-utils.js"></script> |
| </head> |
| <body> |
| <canvas id="testbed" width="40" height="40" style="width: 40px; height: 40px;"></canvas> |
| <div id="description"></div> |
| <div id="console"></div> |
| <script> |
| "use strict"; |
| var wtu = WebGLTestUtils; |
| description('Verify multisampled renderbuffers are initialized to 0 before being read in WebGL'); |
| |
| var gl = wtu.create3DContext("testbed", null, 2); |
| |
| if (!gl) { |
| testFailed('canvas.getContext() failed'); |
| } else { |
| // Set the clear color to green. It should never show up. |
| gl.clearColor(0, 1, 0, 1); |
| |
| let c = gl.canvas; |
| var maxSamples = gl.getInternalformatParameter( |
| gl.RENDERBUFFER, gl.RGBA8, gl.SAMPLES)[0]; |
| for (let i = 0; i < 2; ++i) { |
| runTest(gl, {alloc1: {w: c.width, h: c.height, s: maxSamples}, alloc2: null}); |
| runTest(gl, {alloc1: null, alloc2: {w: c.width, h: c.height, s: maxSamples}}); |
| |
| // Tests for initially allocating at the wrong size. |
| // This is caused by a Qualcomm driver bug: http://crbug.com/696126 |
| runTest(gl, {alloc1: {w: 5, h: 5, s: maxSamples}, alloc2: {w: c.width, h: c.height, s: maxSamples}}); |
| runTest(gl, {alloc1: {w: 5, h: 5, s: maxSamples}, alloc2: {w: c.width, h: c.height, s: 0}}); |
| runTest(gl, {alloc1: {w: 5, h: 5, s: 0}, alloc2: {w: c.width, h: c.height, s: maxSamples}}); |
| } |
| |
| // Testing buffer clearing won't change the clear values. |
| var clearColor = gl.getParameter(gl.COLOR_CLEAR_VALUE); |
| shouldBe("clearColor", "[0, 1, 0, 1]"); |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, 'should be no errors'); |
| } |
| |
| function runTest(gl, params) { |
| debug("Test for color buffer: " + JSON.stringify(params)); |
| let resolve = params.alloc2 ? params.alloc2 : params.alloc1; |
| wtu.checkCanvasRect(gl, 0, 0, resolve.w, resolve.h, |
| [0, 0, 0, 0], |
| "internal buffers have been initialized to 0"); |
| |
| // fill the back buffer so we know that reading below happens from |
| // the renderbuffer. |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| |
| // Set up non-multisampled buffer to blit to and read back from. |
| var fbo = gl.createFramebuffer(); |
| gl.bindFramebuffer(gl.FRAMEBUFFER, fbo); |
| var buffer = gl.createRenderbuffer(); |
| gl.bindRenderbuffer(gl.RENDERBUFFER, buffer); |
| gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA8, resolve.w, resolve.h); |
| attachBuffer(buffer); |
| shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", |
| "gl.FRAMEBUFFER_COMPLETE"); |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, 'should be no errors'); |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| wtu.checkCanvasRect(gl, 0, 0, resolve.w, resolve.h, |
| [0, 255, 0, 255], |
| "user buffer has been cleared to green"); |
| |
| // Set up multisampled buffer to test. |
| var fbo_m = gl.createFramebuffer(); |
| gl.bindFramebuffer(gl.FRAMEBUFFER, fbo_m); |
| var buffer_m = gl.createRenderbuffer(); |
| gl.bindRenderbuffer(gl.RENDERBUFFER, buffer_m); |
| |
| if (params.alloc1) { |
| allocStorage(params.alloc1.w, params.alloc1.h, params.alloc1.s); |
| } |
| attachBuffer(buffer_m); |
| if (params.alloc2) { |
| if (params.alloc1) { |
| // Clear the FBO in order to make sure framebufferRenderbuffer is |
| // committed. (In Firefox, framebufferRenderbuffer is deferred, so |
| // this is needed to trigger the bug.) |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| } |
| allocStorage(params.alloc2.w, params.alloc2.h, params.alloc2.s); |
| } |
| |
| function allocStorage(width, height, samples) { |
| gl.renderbufferStorageMultisample( |
| gl.RENDERBUFFER, samples, gl.RGBA8, width, height); |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, |
| "should be no error after renderbufferStorageMultisample(RGBA8)."); |
| } |
| |
| function attachBuffer(buffer) { |
| gl.framebufferRenderbuffer( |
| gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, buffer); |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, |
| "should be no error after framebufferRenderbuffer."); |
| } |
| |
| shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", |
| "gl.FRAMEBUFFER_COMPLETE"); |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, 'should be no errors'); |
| |
| // Blit from multisampled buffer to non-multisampled buffer. |
| gl.bindFramebuffer(gl.READ_FRAMEBUFFER, fbo_m); |
| gl.bindFramebuffer(gl.DRAW_FRAMEBUFFER, fbo); |
| // Blit color from fbo_m (should be black) to fbo (should be green) |
| gl.blitFramebuffer(0, 0, resolve.w, resolve.h, |
| 0, 0, resolve.w, resolve.h, |
| gl.COLOR_BUFFER_BIT, gl.NEAREST); |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, 'should be no errors'); |
| |
| gl.bindFramebuffer(gl.FRAMEBUFFER, fbo); |
| wtu.checkCanvasRect(gl, 0, 0, resolve.w, resolve.h, |
| [0, 0, 0, 0], |
| "user buffer has been initialized to 0"); |
| |
| gl.deleteFramebuffer(fbo_m); |
| gl.deleteRenderbuffer(buffer_m); |
| gl.deleteFramebuffer(fbo); |
| gl.deleteRenderbuffer(buffer); |
| |
| // this clear should not matter we are about to resize |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| |
| gl.canvas.width += 1; |
| gl.canvas.height += 1; |
| |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, 'should be no errors'); |
| debug(''); |
| } |
| |
| var successfullyParsed = true; |
| </script> |
| <script src="../../js/js-test-post.js"></script> |
| </body> |
| </html> |
