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-rw-r--r-- | dom/canvas/test/webgl-conf/checkout/conformance/glsl/bugs/fragcoord-linking-bug.html | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/glsl/bugs/fragcoord-linking-bug.html b/dom/canvas/test/webgl-conf/checkout/conformance/glsl/bugs/fragcoord-linking-bug.html new file mode 100644 index 0000000000..f22632c0a4 --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/glsl/bugs/fragcoord-linking-bug.html @@ -0,0 +1,93 @@ +<!-- +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"> +<title>GLSL compiler bug referencing gl_FragCoord</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> +<!-- These shaders were extracted from Skia's GPU accelerated backend "Ganesh". --> +<script id="shader-vs" type="x-shader/x-vertex"> +uniform mat3 uViewM; +uniform mat3 uStageMatrix_Stage1; +uniform vec4 urtAdjustment; +attribute vec2 aPosition; +attribute vec4 aColor; +varying vec4 vColor; +varying vec2 vMatrixCoord_Stage1; +void main() { + vec3 pos3 = uViewM * vec3(aPosition, 1); + vColor = aColor; + { // Stage 0: XferEffect + } + vMatrixCoord_Stage1 = (uStageMatrix_Stage1 * vec3(aPosition, 1)).xy; + { // Stage 1: Texture + } + gl_Position = vec4(dot(pos3.xz, urtAdjustment.xy), dot(pos3.yz, urtAdjustment.zw), 0, pos3.z); +} +</script> + +<script id="shader-fs" type="x-shader/x-fragment"> +precision mediump float; +uniform sampler2D uDstCopySampler; +uniform vec2 uDstCopyUpperLeft; +uniform vec2 uDstCopyCoordScale; +uniform float uRTHeight; +uniform sampler2D uSampler0_Stage1; +varying vec4 vColor; +varying vec2 vMatrixCoord_Stage1; +void main() { + vec4 fragCoordYDown = vec4(gl_FragCoord.x, uRTHeight - gl_FragCoord.y, gl_FragCoord.zw); + // Read color from copy of the destination. + vec2 _dstTexCoord = (fragCoordYDown.xy - uDstCopyUpperLeft) * uDstCopyCoordScale; + _dstTexCoord.y = 1.0 - _dstTexCoord.y; + vec4 _dstColor = texture2D(uDstCopySampler, _dstTexCoord); + + vec4 output_Stage0; + { // Stage 0: XferEffect + // SkXfermode::Mode: Multiply + output_Stage0.a = vColor.a + (1.0 - vColor.a) * _dstColor.a; + output_Stage0.rgb = (1.0 - vColor.a) * _dstColor.rgb + (1.0 - _dstColor.a) * vColor.rgb + vColor.rgb * _dstColor.rgb; + } + vec4 output_Stage1; + { // Stage 1: Texture + output_Stage1 = texture2D(uSampler0_Stage1, vMatrixCoord_Stage1); + } + gl_FragColor = ((output_Stage0 * output_Stage1) + ((vec4(1) - output_Stage1) * _dstColor)); +} +</script> +<div id="description"></div> +<div id="console"></div> +<script> +"use strict"; + +description(); +debug(""); +debug('Verify shaders using gl_FragCoord z and w components compile and link correctly'); +debug('Regression test for Qualcomm bug ID CR649654'); +var wtu = WebGLTestUtils; +var gl = wtu.create3DContext(); +if (!gl) { + testFailed("context does not exist"); +} else { + var program = wtu.setupProgram(gl, ["shader-vs", "shader-fs"], null, null, true); + if (program) { + testPassed("Program compiled and linked successfully"); + } else { + testFailed("Program failed to compile and link"); + } +} + +var successfullyParsed = true; +</script> +<script src="../../../js/js-test-post.js"></script> +</body> +</html> |