LayoutTests/webgl/2.0.0/resources/webgl_test_files/conformance/glsl/misc/shader-with-too-many-uniforms.html - WebKit - Git at Google

 <!--

 /*
 ** Copyright (c) 2012 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 GLSL Conformance Tests</title>
 <link rel="stylesheet" href="../../../resources/js-test-style.css"/>
 <link rel="stylesheet" href="../../../resources/glsl-feature-tests.css"/>
 <script src="../../../js/js-test-pre.js"></script>
 <script src="../../../js/webgl-test-utils.js"></script>
 <script src="../../../js/glsl-conformance-test.js"></script>
 </head>
 <body>
 <div id="description"></div>
 <div id="console"></div>
 <script id="vshader" type="x-shader/x-vertex">
 attribute vec4 a_position;
 void main()
 {
     gl_Position = a_position;
 }
 </script>
 <script id="vshader-max" type="x-shader/x-vertex">
 attribute vec4 a_position;
 uniform vec4 u_color[$(maxUniformVectors)];
 void main()
 {
     vec4 v = vec4(0, 0, 0, 0);
     for (int i = 0; i < $(maxUniformVectors); ++i) {
         v = v + vec4(u_color[i]);
     }
     gl_Position = a_position + v;
 }
 </script>
 <script id="fshader" type="x-shader/x-fragment">
 precision mediump float;
 void main()
 {
     gl_FragColor = vec4(0, 1, 0, 1);
 }
 </script>
 <script id="fshader-max" type="x-shader/x-fragment">
 precision mediump float;
 uniform vec4 u_color[$(maxUniformVectors)];
 void main()
 {
     vec4 v = vec4(0, 0, 0, 0);
     for (int i = 0; i < $(maxUniformVectors); ++i) {
         v = v + vec4(u_color[i]);
     }
     gl_FragColor = v;
 }
 </script>
 <script>
 "use strict";
 description("checks shader with too many uniforms fails");

 var wtu = WebGLTestUtils;
 var gl = wtu.create3DContext();
 var maxFragmentUniformVectors = gl.getParameter(gl.MAX_FRAGMENT_UNIFORM_VECTORS);
 var maxVertexUniformVectors = gl.getParameter(gl.MAX_VERTEX_UNIFORM_VECTORS);

 // Up to 2 uniform vector registers may be spent for literal constants in
 // vshader-max or fshader-max code. One vector row is used for the vec4, and
 // another may be used for integer constants that are allowed to be treated
 // internally as floats and are packable to the space of one row. This is
 // according to the GLSL ES variable packing algorithm detailed in Section 7 of
 // Appendix A of the GLSL ES Specification 10.0.17.
 var maxVectorStorageUsedForLiterals = 2;

 var tests = [
  { desc: "using all uniforms in vertex shader should succeed",
    maxUniformVectors: maxVertexUniformVectors - maxVectorStorageUsedForLiterals,
    vShader: "vshader-max",
    fShader: "fshader",
    success: true,
  },
  { desc: "using too many uniforms in vertex shader should fail",
    maxUniformVectors: maxVertexUniformVectors + 1,
    vShader: "vshader-max",
    fShader: "fshader",
    color: [0, 1, 0, 1],
    success: false,
  },
  { desc: "using all uniforms in fragment shader should succeed",
    maxUniformVectors: maxFragmentUniformVectors - maxVectorStorageUsedForLiterals,
    vShader: "vshader",
    fShader: "fshader-max",
    success: true,
  },
  { desc: "using too many uniforms in fragment shader should fail",
    maxUniformVectors: maxFragmentUniformVectors + 1,
    vShader: "vshader",
    fShader: "fshader-max",
    color: [0, 1, 0, 1],
    success: false,
  },
 ];

 var glslTests = [];

 for (var ii = 0; ii < tests.length; ++ii) {
   var test = tests[ii];
   var vSrc = wtu.replaceParams(wtu.getScript(test.vShader), test);
   var fSrc = wtu.replaceParams(wtu.getScript(test.fShader), test);
   glslTests.push({
     vShaderSource: vSrc,
     fShaderSource: fSrc,
     linkSuccess: test.success,
     passMsg: 'shader ' + test.desc,
   });
 }

 GLSLConformanceTester.runTests(glslTests);
 var successfullyParsed = true;
 </script>
 </body>
 </html>
	<!--

	/*
	** Copyright (c) 2012 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 GLSL Conformance Tests</title>
	<link rel="stylesheet" href="../../../resources/js-test-style.css"/>
	<link rel="stylesheet" href="../../../resources/glsl-feature-tests.css"/>
	<script src="../../../js/js-test-pre.js"></script>
	<script src="../../../js/webgl-test-utils.js"></script>
	<script src="../../../js/glsl-conformance-test.js"></script>
	</head>
	<body>
	<div id="description"></div>
	<div id="console"></div>
	<script id="vshader" type="x-shader/x-vertex">
	attribute vec4 a_position;
	void main()
	{
	gl_Position = a_position;
	}
	</script>
	<script id="vshader-max" type="x-shader/x-vertex">
	attribute vec4 a_position;
	uniform vec4 u_color[$(maxUniformVectors)];
	void main()
	{
	vec4 v = vec4(0, 0, 0, 0);
	for (int i = 0; i < $(maxUniformVectors); ++i) {
	v = v + vec4(u_color[i]);
	}
	gl_Position = a_position + v;
	}
	</script>
	<script id="fshader" type="x-shader/x-fragment">
	precision mediump float;
	void main()
	{
	gl_FragColor = vec4(0, 1, 0, 1);
	}
	</script>
	<script id="fshader-max" type="x-shader/x-fragment">
	precision mediump float;
	uniform vec4 u_color[$(maxUniformVectors)];
	void main()
	{
	vec4 v = vec4(0, 0, 0, 0);
	for (int i = 0; i < $(maxUniformVectors); ++i) {
	v = v + vec4(u_color[i]);
	}
	gl_FragColor = v;
	}
	</script>
	<script>
	"use strict";
	description("checks shader with too many uniforms fails");

	var wtu = WebGLTestUtils;
	var gl = wtu.create3DContext();
	var maxFragmentUniformVectors = gl.getParameter(gl.MAX_FRAGMENT_UNIFORM_VECTORS);
	var maxVertexUniformVectors = gl.getParameter(gl.MAX_VERTEX_UNIFORM_VECTORS);

	// Up to 2 uniform vector registers may be spent for literal constants in
	// vshader-max or fshader-max code. One vector row is used for the vec4, and
	// another may be used for integer constants that are allowed to be treated
	// internally as floats and are packable to the space of one row. This is
	// according to the GLSL ES variable packing algorithm detailed in Section 7 of
	// Appendix A of the GLSL ES Specification 10.0.17.
	var maxVectorStorageUsedForLiterals = 2;

	var tests = [
	{ desc: "using all uniforms in vertex shader should succeed",
	maxUniformVectors: maxVertexUniformVectors - maxVectorStorageUsedForLiterals,
	vShader: "vshader-max",
	fShader: "fshader",
	success: true,
	},
	{ desc: "using too many uniforms in vertex shader should fail",
	maxUniformVectors: maxVertexUniformVectors + 1,
	vShader: "vshader-max",
	fShader: "fshader",
	color: [0, 1, 0, 1],
	success: false,
	},
	{ desc: "using all uniforms in fragment shader should succeed",
	maxUniformVectors: maxFragmentUniformVectors - maxVectorStorageUsedForLiterals,
	vShader: "vshader",
	fShader: "fshader-max",
	success: true,
	},
	{ desc: "using too many uniforms in fragment shader should fail",
	maxUniformVectors: maxFragmentUniformVectors + 1,
	vShader: "vshader",
	fShader: "fshader-max",
	color: [0, 1, 0, 1],
	success: false,
	},
	];

	var glslTests = [];

	for (var ii = 0; ii < tests.length; ++ii) {
	var test = tests[ii];
	var vSrc = wtu.replaceParams(wtu.getScript(test.vShader), test);
	var fSrc = wtu.replaceParams(wtu.getScript(test.fShader), test);
	glslTests.push({
	vShaderSource: vSrc,
	fShaderSource: fSrc,
	linkSuccess: test.success,
	passMsg: 'shader ' + test.desc,
	});
	}

	GLSLConformanceTester.runTests(glslTests);
	var successfullyParsed = true;
	</script>
	</body>
	</html>