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Diffstat (limited to 'dom/canvas/test/webgl-conf/checkout/conformance/limits/gl-line-width.html')
| -rw-r--r-- | dom/canvas/test/webgl-conf/checkout/conformance/limits/gl-line-width.html | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/limits/gl-line-width.html b/dom/canvas/test/webgl-conf/checkout/conformance/limits/gl-line-width.html new file mode 100644 index 0000000000..e446c62a94 --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/limits/gl-line-width.html @@ -0,0 +1,72 @@ +<!-- +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>Verify that line width limits are enforced.</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="example" width="4" height="4" style="width: 40px; height: 30px;"></canvas> +<div id="description"></div> +<div id="console"></div> +<script> +"use strict"; +description(document.title); +var wtu = WebGLTestUtils; +var gl = wtu.create3DContext("example"); + +// Query the line width range +var lineWidthRange = gl.getParameter(gl.ALIASED_LINE_WIDTH_RANGE); +wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors."); + +if (lineWidthRange[0] > 1 || lineWidthRange[1] < 1) + testFailed("Line width range must include width 1"); + +// Zero, negative, or NaN values should cause an error and leave the value unchanged. +var curLineWidth = gl.getParameter(gl.LINE_WIDTH); +gl.lineWidth(0); +wtu.glErrorShouldBe(gl, gl.INVALID_VALUE, "Should not be able to set lineWidth to zero"); +shouldBe('gl.getParameter(gl.LINE_WIDTH)', 'curLineWidth'); // Previous value should be preserved + +gl.lineWidth(-1); +wtu.glErrorShouldBe(gl, gl.INVALID_VALUE, "Should not be able to set lineWidth to a negative value"); +shouldBe('gl.getParameter(gl.LINE_WIDTH)', 'curLineWidth'); // Previous value should be preserved + +gl.lineWidth(NaN); +wtu.glErrorShouldBe(gl, gl.INVALID_VALUE, "Should not be able to set lineWidth to NaN"); +shouldBe('gl.getParameter(gl.LINE_WIDTH)', 'curLineWidth'); // Previous value should be preserved + +// Check that the line width can be set to the valid range. +gl.lineWidth(lineWidthRange[1]); +wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be able to set lineWidth to the max supported value"); +shouldBe('gl.getParameter(gl.LINE_WIDTH)', 'lineWidthRange[1]'); + +gl.lineWidth(lineWidthRange[0]); +wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be able to set lineWidth to the min supported value"); +shouldBe('gl.getParameter(gl.LINE_WIDTH)', 'lineWidthRange[0]'); + +// Checks that the line width can be set outside the supported range without error, +// and the unclamped value can be queried back. +// Yes, this is actually what the spec says should happen. +// See: https://www.khronos.org/opengles/sdk/docs/man3/html/glLineWidth.xhtml +gl.lineWidth(lineWidthRange[1]+1); +wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be able to set lineWidth to the above max supported value"); +shouldBe('gl.getParameter(gl.LINE_WIDTH)', 'lineWidthRange[1]+1'); + +var successfullyParsed = true; + +</script> +<script src="../../js/js-test-post.js"></script> + +</body> +</html> + + |