LayoutTests/webgl/2.0.0/resources/webgl_test_files/conformance/rendering/point-with-gl-pointcoord-in-fragment-shader.html - WebKit - Git at Google

 <!--

 /*
 ** Copyright (c) 2013 The Khronos Group Inc.
 **
 ** Permission is hereby granted, free of charge, to any person obtaining a
 ** copy of this software and/or associated documentation files (the
 ** "Materials"), to deal in the Materials without restriction, including
 ** without limitation the rights to use, copy, modify, merge, publish,
 ** distribute, sublicense, and/or sell copies of the Materials, and to
 ** permit persons to whom the Materials are furnished to do so, subject to
 ** the following conditions:
 **
 ** The above copyright notice and this permission notice shall be included
 ** in all copies or substantial portions of the Materials.
 **
 ** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 ** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 ** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 ** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 ** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 ** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 ** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
 */

 -->

 <!DOCTYPE html>
 <html>
 <head>
 <meta charset="utf-8">
 <title>WebGL Point with gl_PointCoord in Fragment Shader Test</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>
 <canvas id="canvas" width="64" height="64"> </canvas>
 <div id="console"></div>
 <script id="vs" type="x-shader/x-vertex">
 varying vec4 v_color;

 // The X and Y coordinates of the center of the point.
 attribute vec2 a_vertex;

 uniform float u_pointSize;

 void main(void) {
   gl_PointSize = u_pointSize;
   gl_Position = vec4(a_vertex, 0.0, 1.0);

   // The color of the point.
   v_color = vec4(0.0, 1.0, 0.0, 1.0);
 }

 </script>
 <script id="fs" type="x-shader/x-fragment">
 precision mediump float;

 varying vec4 v_color;

 void main(void) {
   // It seems as long as this mathematical expression references
   // gl_PointCoord, the fragment's color is incorrect.
   vec2 diff = gl_PointCoord - vec2(.5, .5);
   if (length(diff) > 0.5)
     discard;

   // The point should be a solid color.
   gl_FragColor = v_color;
 }
 </script>
 <script>
 "use strict";
 // Radar 13239314
 description("This is a regression test for a graphics driver bug affecting end caps on roads in MapsGL.");

 debug("");

 var wtu = WebGLTestUtils;
 var canvas = document.getElementById("canvas");
 var canvasWidth = canvas.width;
 var canvasHeight = canvas.height;
 var output = document.getElementById("console");
 var gl = wtu.create3DContext(canvas);

 function runTest() {
   var pointSizeRange = gl.getParameter(gl.ALIASED_POINT_SIZE_RANGE);
   // This test can't really run without a maximum point size of at least 2
   if (pointSizeRange[1] < 2.0) {
     debug("This test needs a maximum ALIASED_POINT_SIZE_RANGE of at least 2");
     return;
   }

   var vs = wtu.loadShaderFromScript(gl, "vs", gl.VERTEX_SHADER);
   var fs = wtu.loadShaderFromScript(gl, "fs", gl.FRAGMENT_SHADER);
   if (!vs || !fs) {
     testFailed("Loading shaders failed");
     return;
   }

   var program = wtu.setupProgram(gl, [vs, fs], ['a_vertex']);
   if (!program) {
     testFailed("Loading program failed");
     return;
   }

   gl.useProgram(program);
   gl.clearColor(0, 0, 0, 1.0);
   gl.disable(gl.DEPTH_TEST);
   gl.clear(gl.COLOR_BUFFER_BIT);

   // uniform float u_pointSize;
   var uni = gl.getUniformLocation(program, 'u_pointSize');
   gl.uniform1f(uni, Math.min(20.0, pointSizeRange[1]));

   // vertex
   var buffer = gl.createBuffer();
   gl.bindBuffer(gl.ARRAY_BUFFER, buffer);
   var vertexData = new Float32Array([
     0, 0,
   ]);
   gl.bufferData(gl.ARRAY_BUFFER, vertexData, gl.STATIC_DRAW);
   gl.enableVertexAttribArray(0);
   gl.vertexAttribPointer(0, 2, gl.FLOAT, false, 0, 0);

   gl.drawArrays(gl.POINTS, 0, 1);
   wtu.checkCanvasRect(gl, canvasWidth / 2, canvasHeight / 2, 1, 1,
       [0, 255, 0, 255], "Center pixel should be green", 2);
 }

 runTest();

 debug("");
 var successfullyParsed = true;
 </script>
 <script src="../../js/js-test-post.js"></script>
 </body>
 </html>
	<!--

	/*
	** Copyright (c) 2013 The Khronos Group Inc.
	**
	** Permission is hereby granted, free of charge, to any person obtaining a
	** copy of this software and/or associated documentation files (the
	** "Materials"), to deal in the Materials without restriction, including
	** without limitation the rights to use, copy, modify, merge, publish,
	** distribute, sublicense, and/or sell copies of the Materials, and to
	** permit persons to whom the Materials are furnished to do so, subject to
	** the following conditions:
	**
	** The above copyright notice and this permission notice shall be included
	** in all copies or substantial portions of the Materials.
	**
	** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
	** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
	** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
	** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
	** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
	*/

	-->

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<title>WebGL Point with gl_PointCoord in Fragment Shader Test</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>
	<canvas id="canvas" width="64" height="64"> </canvas>
	<div id="console"></div>
	<script id="vs" type="x-shader/x-vertex">
	varying vec4 v_color;

	// The X and Y coordinates of the center of the point.
	attribute vec2 a_vertex;

	uniform float u_pointSize;

	void main(void) {
	gl_PointSize = u_pointSize;
	gl_Position = vec4(a_vertex, 0.0, 1.0);

	// The color of the point.
	v_color = vec4(0.0, 1.0, 0.0, 1.0);
	}

	</script>
	<script id="fs" type="x-shader/x-fragment">
	precision mediump float;

	varying vec4 v_color;

	void main(void) {
	// It seems as long as this mathematical expression references
	// gl_PointCoord, the fragment's color is incorrect.
	vec2 diff = gl_PointCoord - vec2(.5, .5);
	if (length(diff) > 0.5)
	discard;

	// The point should be a solid color.
	gl_FragColor = v_color;
	}
	</script>
	<script>
	"use strict";
	// Radar 13239314
	description("This is a regression test for a graphics driver bug affecting end caps on roads in MapsGL.");

	debug("");

	var wtu = WebGLTestUtils;
	var canvas = document.getElementById("canvas");
	var canvasWidth = canvas.width;
	var canvasHeight = canvas.height;
	var output = document.getElementById("console");
	var gl = wtu.create3DContext(canvas);

	function runTest() {
	var pointSizeRange = gl.getParameter(gl.ALIASED_POINT_SIZE_RANGE);
	// This test can't really run without a maximum point size of at least 2
	if (pointSizeRange[1] < 2.0) {
	debug("This test needs a maximum ALIASED_POINT_SIZE_RANGE of at least 2");
	return;
	}

	var vs = wtu.loadShaderFromScript(gl, "vs", gl.VERTEX_SHADER);
	var fs = wtu.loadShaderFromScript(gl, "fs", gl.FRAGMENT_SHADER);
	if (!vs \|\| !fs) {
	testFailed("Loading shaders failed");
	return;
	}

	var program = wtu.setupProgram(gl, [vs, fs], ['a_vertex']);
	if (!program) {
	testFailed("Loading program failed");
	return;
	}

	gl.useProgram(program);
	gl.clearColor(0, 0, 0, 1.0);
	gl.disable(gl.DEPTH_TEST);
	gl.clear(gl.COLOR_BUFFER_BIT);

	// uniform float u_pointSize;
	var uni = gl.getUniformLocation(program, 'u_pointSize');
	gl.uniform1f(uni, Math.min(20.0, pointSizeRange[1]));

	// vertex
	var buffer = gl.createBuffer();
	gl.bindBuffer(gl.ARRAY_BUFFER, buffer);
	var vertexData = new Float32Array([
	0, 0,
	]);
	gl.bufferData(gl.ARRAY_BUFFER, vertexData, gl.STATIC_DRAW);
	gl.enableVertexAttribArray(0);
	gl.vertexAttribPointer(0, 2, gl.FLOAT, false, 0, 0);

	gl.drawArrays(gl.POINTS, 0, 1);
	wtu.checkCanvasRect(gl, canvasWidth / 2, canvasHeight / 2, 1, 1,
	[0, 255, 0, 255], "Center pixel should be green", 2);
	}

	runTest();

	debug("");
	var successfullyParsed = true;
	</script>
	<script src="../../js/js-test-post.js"></script>
	</body>
	</html>