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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.
-->
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>WebGL WEBGL_polygon_mode 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 WEBGL_polygon_mode extension, if it is available.");
debug("");
var wtu = WebGLTestUtils;
var gl = wtu.create3DContext("c");
var ext;
const w = gl.drawingBufferWidth;
const h = gl.drawingBufferHeight;
function runTestNoExtension() {
debug("");
debug("Check the parameters without the extension");
shouldBeNull("gl.getParameter(0x0B40 /* POLYGON_MODE_WEBGL */)");
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(0x2A02 /* POLYGON_OFFSET_LINE_WEBGL */)");
wtu.glErrorShouldBe(gl, gl.INVALID_ENUM, "parameter unknown without enabling the extension");
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors");
debug("Check the cap without the extension");
gl.disable(0x2A02 /* POLYGON_OFFSET_LINE_WEBGL */);
wtu.glErrorShouldBe(gl, gl.INVALID_ENUM, "cap unknown without enabling the extension");
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors");
gl.enable(0x2A02 /* POLYGON_OFFSET_LINE_WEBGL */);
wtu.glErrorShouldBe(gl, gl.INVALID_ENUM, "cap unknown without enabling the extension");
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors");
shouldBeFalse("gl.isEnabled(0x2A02 /* POLYGON_OFFSET_LINE_WEBGL */)");
wtu.glErrorShouldBe(gl, gl.INVALID_ENUM, "cap unknown without enabling the extension");
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors");
}
function checkEnums() {
debug("");
debug("Check enums");
shouldBe("ext.POLYGON_MODE_WEBGL", "0x0B40");
shouldBe("ext.POLYGON_OFFSET_LINE_WEBGL", "0x2A02");
shouldBe("ext.LINE_WEBGL", "0x1B01");
shouldBe("ext.FILL_WEBGL", "0x1B02");
}
function checkQueries() {
debug("");
debug("Check default state");
shouldBe('gl.getParameter(ext.POLYGON_MODE_WEBGL)', 'ext.FILL_WEBGL');
shouldBeFalse('gl.getParameter(ext.POLYGON_OFFSET_LINE_WEBGL)');
shouldBeFalse('gl.isEnabled(ext.POLYGON_OFFSET_LINE_WEBGL)');
debug("");
debug("Check state updates");
ext.polygonModeWEBGL(gl.FRONT_AND_BACK, ext.LINE_WEBGL);
shouldBe('gl.getParameter(ext.POLYGON_MODE_WEBGL)', 'ext.LINE_WEBGL');
ext.polygonModeWEBGL(gl.FRONT_AND_BACK, ext.FILL_WEBGL);
shouldBe('gl.getParameter(ext.POLYGON_MODE_WEBGL)', 'ext.FILL_WEBGL');
debug("");
debug("Check errors");
ext.polygonModeWEBGL(gl.FRONT, ext.LINE_WEBGL);
wtu.glErrorShouldBe(gl, gl.INVALID_ENUM, "invalid face");
ext.polygonModeWEBGL(gl.FRONT_AND_BACK, 0);
wtu.glErrorShouldBe(gl, gl.INVALID_ENUM, "invalid mode");
shouldBe('gl.getParameter(ext.POLYGON_MODE_WEBGL)', 'ext.FILL_WEBGL');
debug("");
debug("Check cap updates");
gl.enable(ext.POLYGON_OFFSET_LINE_WEBGL);
shouldBeTrue('gl.getParameter(ext.POLYGON_OFFSET_LINE_WEBGL)');
shouldBeTrue('gl.isEnabled(ext.POLYGON_OFFSET_LINE_WEBGL)');
gl.disable(ext.POLYGON_OFFSET_LINE_WEBGL);
shouldBeFalse('gl.getParameter(ext.POLYGON_OFFSET_LINE_WEBGL)');
shouldBeFalse('gl.isEnabled(ext.POLYGON_OFFSET_LINE_WEBGL)');
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors");
}
function checkDiagonal(r, g, b) {
const pixels = new Uint8Array(w * h * 4);
gl.readPixels(0, 0, w, h, gl.RGBA, gl.UNSIGNED_BYTE, pixels);
for (let i = 0; i < w; i++)
{
const baseOffset = (i * w + i) * 4;
if (pixels[baseOffset + 0] != r ||
pixels[baseOffset + 1] != g ||
pixels[baseOffset + 2] != b) {
testFailed(`Unexpected diagonal color at (${i}, ${i})`);
return;
}
}
testPassed("Expected diagonal color");
}
function checkLineMode() {
debug("");
debug("Check line polygon mode");
gl.enable(gl.DEPTH_TEST);
const program = wtu.setupProgram(gl, [wtu.simpleVertexShader,
wtu.simpleColorFragmentShader]);
gl.useProgram(program);
const colorLoc = gl.getUniformLocation(program, "u_color");
wtu.setupUnitQuad(gl);
// Draw red quad with lines
gl.uniform4f(colorLoc, 1, 0, 0, 1);
ext.polygonModeWEBGL(gl.FRONT_AND_BACK, ext.LINE_WEBGL);
wtu.clearAndDrawUnitQuad(gl);
// Nothing is drawn inside triangles
wtu.checkCanvasRect(gl, 2, 17, 13, 13, [255, 255, 255, 255]);
wtu.checkCanvasRect(gl, 17, 2, 13, 13, [255, 255, 255, 255]);
// Main diagonal is drawn
checkDiagonal(255, 0, 0);
// Test polygon offset
gl.polygonOffset(0, -2);
gl.enable(gl.POLYGON_OFFSET_FILL);
// Depth test must fail because line mode uses its own polygon offset toggle
gl.uniform4f(colorLoc, 0, 1, 0, 1);
wtu.drawUnitQuad(gl);
checkDiagonal(255, 0, 0);
// Depth test must pass
gl.enable(ext.POLYGON_OFFSET_LINE_WEBGL)
wtu.drawUnitQuad(gl);
checkDiagonal(0, 255, 0);
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors");
}
function runTestExtension() {
checkEnums();
checkQueries();
checkLineMode();
}
function runTest() {
if (!gl) {
testFailed("WebGL context does not exist");
return;
}
testPassed("WebGL context exists");
runTestNoExtension();
ext = gl.getExtension("WEBGL_polygon_mode");
wtu.runExtensionSupportedTest(gl, "WEBGL_polygon_mode", ext !== null);
if (ext !== null) {
runTestExtension();
} else {
testPassed("No WEBGL_polygon_mode support -- this is legal");
}
}
runTest();
var successfullyParsed = true;
</script>
<script src="../../js/js-test-post.js"></script>
</body>
</html>
|
