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Diffstat (limited to 'dom/canvas/test/webgl-conf/checkout/conformance2/rendering/clearbufferfv-with-alpha-false.html')
-rw-r--r-- | dom/canvas/test/webgl-conf/checkout/conformance2/rendering/clearbufferfv-with-alpha-false.html | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/dom/canvas/test/webgl-conf/checkout/conformance2/rendering/clearbufferfv-with-alpha-false.html b/dom/canvas/test/webgl-conf/checkout/conformance2/rendering/clearbufferfv-with-alpha-false.html new file mode 100644 index 0000000000..a50b6f8e2f --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance2/rendering/clearbufferfv-with-alpha-false.html @@ -0,0 +1,80 @@ +<!-- +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>Test clearBufferfv with alpha:false canvas</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> +<div id="description"></div> +<div id="console"></div> +<canvas id="canvas" width="20" height="20"> </canvas> +<script> +"use strict"; +description("This tests the operation of clearBufferfv with the back buffer of an alpha:false canvas."); + +function verifyOnePixel(readFormat, readType, arrayType, expectedColor) { + var buffer = new arrayType(4); + gl.readPixels(0, 0, 1, 1, readFormat, readType, buffer); + if (buffer[0] == expectedColor[0] && + buffer[1] == expectedColor[1] && + buffer[2] == expectedColor[2] && + buffer[3] == expectedColor[3]) { + testPassed("clearBufferfv set the color buffer to the correct value"); + } else { + testFailed("clearBufferfv failed to work. Expected: " + expectedColor + ", got: " + buffer); + } +} + +function testClearBuffer(func, format, arrayType, readFormat, readType, readArrayType) { + debug(""); + debug("Testing " + func); + + var srcData = new arrayType([0, 1, 0, 0]); + gl[func](gl.COLOR, 0, srcData); + wtu.glErrorShouldBe(gl, gl.NO_ERROR, "clearBuffer with no srcOffset should succeed"); + // Back buffer has no alpha channel + verifyOnePixel(readFormat, readType, Uint8Array, [0, 255, 0, 255]); +} + +var wtu = WebGLTestUtils; +var canvas = document.getElementById("canvas"); +var gl = wtu.create3DContext(canvas, { alpha:false }, 2); +if (!gl) { + testFailed("context does not exist"); +} else { + testPassed("context exists"); + + var testCases = [ + { + func: "clearBufferfv", format: gl.RGBA, arrayType: Float32Array, + readFormat: gl.RGBA, readType: gl.UNSIGNED_BYTE, readArrayType: Uint8Array, + }, + ]; + + for (var tt = 0; tt < testCases.length; ++tt) { + var test = testCases[tt]; + if (test.extension && !gl.getExtension(test.extension)) + continue; + testClearBuffer(test.func, test.format, test.arrayType, + test.readFormat, test.readType, test.readArrayType); + } +} + +debug(""); +wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no error"); +var successfullyParsed = true; + +</script> +<script src="../../js/js-test-post.js"></script> + +</body> +</html> |