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-rw-r--r-- | dom/canvas/test/webgl-conf/checkout/conformance2/rendering/blitframebuffer-unaffected-by-colormask.html | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/dom/canvas/test/webgl-conf/checkout/conformance2/rendering/blitframebuffer-unaffected-by-colormask.html b/dom/canvas/test/webgl-conf/checkout/conformance2/rendering/blitframebuffer-unaffected-by-colormask.html new file mode 100644 index 0000000000..3d2d7f54bc --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance2/rendering/blitframebuffer-unaffected-by-colormask.html @@ -0,0 +1,102 @@ +<!-- +Copyright (c) 2021 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"> +<title>BlitFramebuffer Should Be Unaffected by ColorMask</title> +<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="canvas" width="8" height="8"></canvas> +<div id="description"></div> +<div id="console"></div> + +<script> +"use strict"; + +const wtu = WebGLTestUtils; +description("This test verifies that the blitFramebuffer is unaffected by the colorMask state."); + +debug('Regression test for <a href="https://crbug.com/1257769">https://crbug.com/1257769</a> and <a href="https://bugs.webkit.org/show_bug.cgi?id=220129">https://bugs.webkit.org/show_bug.cgi?id=220129</a>'); + +function allocateTexture(gl, size) { + const tex = gl.createTexture(); + gl.bindTexture(gl.TEXTURE_2D, tex); + gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA8, size, size, 0, gl.RGBA, gl.UNSIGNED_BYTE, null); + return tex; +} + +function allocateFBO(gl, tex) { + const fbo = gl.createFramebuffer(); + gl.bindFramebuffer(gl.DRAW_FRAMEBUFFER, fbo); + gl.framebufferTexture2D(gl.DRAW_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex, 0); + return fbo; +} + +function run() { + const gl = wtu.create3DContext("canvas", { antialias: false }, 2); + + if (!gl) { + testFailed("WebGL context does not exist"); + finishTest(); + return; + } + + const size = 8; + + testPassed("WebGL context exists"); + + // Allocate source and destination textures and framebuffer objects. + const sourceTex = allocateTexture(gl, size); + const sourceFBO = allocateFBO(gl, sourceTex); + + const destTex = allocateTexture(gl, size); + const destFBO = allocateFBO(gl, destTex); + + const program = wtu.setupColorQuad(gl); + + gl.bindFramebuffer(gl.FRAMEBUFFER, sourceFBO); + + // Clear the source framebuffer to red. + gl.clearColor(1, 0, 0, 1); + gl.colorMask(true, true, true, true); + gl.clear(gl.COLOR_BUFFER_BIT); + + // Draw a transparent green quad. + gl.useProgram(program); + wtu.drawFloatColorQuad(gl, [ 0, 255, 0, 0 ]); + + // Clear the alpha channel. + gl.colorMask(false, false, false, true); + gl.clearColor(0, 0, 0, 1); + gl.clear(gl.COLOR_BUFFER_BIT); + + // At this point, even setting the colorMask to all-true won't + // work around the bug, since that state is latched inside ANGLE + // only during draws / clears. + + // Blit source to dest. + gl.bindFramebuffer(gl.DRAW_FRAMEBUFFER, destFBO); + gl.blitFramebuffer(0, 0, size, size, 0, 0, size, size, gl.COLOR_BUFFER_BIT, gl.NEAREST); + gl.bindFramebuffer(gl.READ_FRAMEBUFFER, destFBO); + + // Note that the on-screen canvas is always black - we don't blit the result to it. + wtu.checkCanvas(gl, [ 0, 255, 0, 255 ], "should be green", 1); + finishTest(); +} + +var successfullyParsed = true; + +requestAnimationFrame(run); + +</script> + +</body> +</html> |