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Move EXT_clip_control to draft; add tests (#3568)
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<!-- | ||
Copyright (c) 2023 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. | ||
--> | ||
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<!DOCTYPE html> | ||
<html> | ||
<head> | ||
<meta charset="utf-8"> | ||
<title>WebGL EXT_clip_control Conformance Tests</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 width="32" height="32" id="c"></canvas> | ||
<div id="description"></div> | ||
<div id="console"></div> | ||
<script> | ||
"use strict"; | ||
description("This test verifies the functionality of the EXT_clip_control extension, if it is available."); | ||
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debug(""); | ||
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var wtu = WebGLTestUtils; | ||
var gl = wtu.create3DContext("c"); | ||
var ext; | ||
const w = gl.drawingBufferWidth; | ||
const h = gl.drawingBufferHeight; | ||
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function runTestNoExtension() { | ||
debug(""); | ||
debug("Check the parameters without the extension"); | ||
shouldBeNull("gl.getParameter(0x935C /* CLIP_ORIGIN_EXT */)"); | ||
wtu.glErrorShouldBe(gl, gl.INVALID_ENUM, "parameter unknown without enabling the extension"); | ||
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors"); | ||
shouldBeNull("gl.getParameter(0x935D /* CLIP_DEPTH_MODE_EXT */)"); | ||
wtu.glErrorShouldBe(gl, gl.INVALID_ENUM, "parameter unknown without enabling the extension"); | ||
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors"); | ||
} | ||
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function checkEnums() { | ||
debug(""); | ||
debug("Check enums"); | ||
shouldBe("ext.LOWER_LEFT_EXT", "0x8CA1"); | ||
shouldBe("ext.UPPER_LEFT_EXT", "0x8CA2"); | ||
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shouldBe("ext.NEGATIVE_ONE_TO_ONE_EXT", "0x935E"); | ||
shouldBe("ext.ZERO_TO_ONE_EXT", "0x935F"); | ||
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shouldBe("ext.CLIP_ORIGIN_EXT", "0x935C"); | ||
shouldBe("ext.CLIP_DEPTH_MODE_EXT", "0x935D"); | ||
} | ||
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function checkQueries() { | ||
debug(""); | ||
debug("Check default state"); | ||
shouldBe('gl.getParameter(ext.CLIP_ORIGIN_EXT)', 'ext.LOWER_LEFT_EXT'); | ||
shouldBe('gl.getParameter(ext.CLIP_DEPTH_MODE_EXT)', 'ext.NEGATIVE_ONE_TO_ONE_EXT'); | ||
debug(""); | ||
debug("Check state updates using the new function"); | ||
ext.clipControlEXT(ext.UPPER_LEFT_EXT, ext.ZERO_TO_ONE_EXT); | ||
shouldBe('gl.getParameter(ext.CLIP_ORIGIN_EXT)', 'ext.UPPER_LEFT_EXT'); | ||
shouldBe('gl.getParameter(ext.CLIP_DEPTH_MODE_EXT)', 'ext.ZERO_TO_ONE_EXT'); | ||
ext.clipControlEXT(ext.LOWER_LEFT_EXT, ext.ZERO_TO_ONE_EXT); | ||
shouldBe('gl.getParameter(ext.CLIP_ORIGIN_EXT)', 'ext.LOWER_LEFT_EXT'); | ||
shouldBe('gl.getParameter(ext.CLIP_DEPTH_MODE_EXT)', 'ext.ZERO_TO_ONE_EXT'); | ||
ext.clipControlEXT(ext.UPPER_LEFT_EXT, ext.NEGATIVE_ONE_TO_ONE_EXT); | ||
shouldBe('gl.getParameter(ext.CLIP_ORIGIN_EXT)', 'ext.UPPER_LEFT_EXT'); | ||
shouldBe('gl.getParameter(ext.CLIP_DEPTH_MODE_EXT)', 'ext.NEGATIVE_ONE_TO_ONE_EXT'); | ||
ext.clipControlEXT(ext.LOWER_LEFT_EXT, ext.NEGATIVE_ONE_TO_ONE_EXT); | ||
shouldBe('gl.getParameter(ext.CLIP_ORIGIN_EXT)', 'ext.LOWER_LEFT_EXT'); | ||
shouldBe('gl.getParameter(ext.CLIP_DEPTH_MODE_EXT)', 'ext.NEGATIVE_ONE_TO_ONE_EXT'); | ||
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors"); | ||
} | ||
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function checkDepthMode() { | ||
debug(""); | ||
debug("Check depth mode toggling"); | ||
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gl.enable(gl.DEPTH_TEST); | ||
gl.clear(gl.DEPTH_BUFFER_BIT); | ||
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const program = wtu.setupProgram(gl, [wtu.simpleVertexShader, | ||
wtu.simpleColorFragmentShader]); | ||
gl.useProgram(program); | ||
const colorLoc = gl.getUniformLocation(program, "u_color"); | ||
wtu.setupUnitQuad(gl); | ||
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// Draw red at 0 with the default depth mode | ||
gl.uniform4f(colorLoc, 1, 0, 0, 1); | ||
ext.clipControlEXT(ext.LOWER_LEFT_EXT, ext.NEGATIVE_ONE_TO_ONE_EXT); | ||
wtu.drawUnitQuad(gl); | ||
wtu.checkCanvasRect(gl, 0, 0, w, h, [255, 0, 0, 255]); | ||
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// Draw green at 0, depth test must fail | ||
gl.uniform4f(colorLoc, 0, 1, 0, 1); | ||
wtu.drawUnitQuad(gl); | ||
wtu.checkCanvasRect(gl, 0, 0, w, h, [255, 0, 0, 255]); | ||
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// Draw green at 0 after switching the depth mode | ||
ext.clipControlEXT(ext.LOWER_LEFT_EXT, ext.ZERO_TO_ONE_EXT); | ||
wtu.drawUnitQuad(gl); | ||
wtu.checkCanvasRect(gl, 0, 0, w, h, [0, 255, 0, 255]); | ||
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wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors"); | ||
} | ||
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function checkClipOrigin() { | ||
debug(""); | ||
debug("Check clip origin toggling"); | ||
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gl.disable(gl.DEPTH_TEST); | ||
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const vertexShader = ` | ||
attribute vec4 vPosition; | ||
varying float y; | ||
void main() { | ||
gl_Position = vPosition; | ||
y = vPosition.y; | ||
}`; | ||
const fragmentShader = ` | ||
precision mediump float; | ||
varying float y; | ||
void main() { | ||
if (y > 0.0) { | ||
gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0); | ||
} else { | ||
gl_FragColor = vec4(0.0, 1.0, 0.0, 1.0); | ||
} | ||
}`; | ||
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const program = wtu.setupProgram(gl, [vertexShader, fragmentShader]); | ||
gl.useProgram(program); | ||
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wtu.setupUnitQuad(gl); | ||
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ext.clipControlEXT(ext.LOWER_LEFT_EXT, ext.NEGATIVE_ONE_TO_ONE_EXT); | ||
wtu.drawUnitQuad(gl); | ||
wtu.checkCanvasRect(gl, 0, 0, w, h / 2 - 2, [0, 255, 0, 255]); | ||
wtu.checkCanvasRect(gl, 0, h / 2 + 2, w, h / 2 - 2, [255, 0, 0, 255]); | ||
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ext.clipControlEXT(ext.UPPER_LEFT_EXT, ext.NEGATIVE_ONE_TO_ONE_EXT); | ||
wtu.drawUnitQuad(gl); | ||
wtu.checkCanvasRect(gl, 0, 0, w, h / 2 - 2, [255, 0, 0, 255]); | ||
wtu.checkCanvasRect(gl, 0, h / 2 + 2, w, h / 2 - 2, [0, 255, 0, 255]); | ||
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wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors"); | ||
} | ||
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function runTestExtension() { | ||
checkEnums(); | ||
checkQueries(); | ||
checkDepthMode(); | ||
checkClipOrigin(); | ||
} | ||
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function runTest() { | ||
if (!gl) { | ||
testFailed("WebGL context does not exist"); | ||
return; | ||
} | ||
testPassed("WebGL context exists"); | ||
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runTestNoExtension(); | ||
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ext = gl.getExtension("EXT_clip_control"); | ||
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wtu.runExtensionSupportedTest(gl, "EXT_clip_control", ext !== null); | ||
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if (ext !== null) { | ||
runTestExtension(); | ||
} else { | ||
testPassed("No EXT_clip_control support -- this is legal"); | ||
} | ||
} | ||
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runTest(); | ||
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var successfullyParsed = true; | ||
</script> | ||
<script src="../../js/js-test-post.js"></script> | ||
</body> | ||
</html> |