LayoutTests/webgl/2.0.0/resources/webgl_test_files/conformance/glsl/misc/shader-varying-packing-restrictions.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 varying packing restrictions Conformance Test</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>
 <canvas id="example" width="2" height="2"> </canvas>
 <script id="vshaderArrayTest" type="x-shader/x-vertex">
 attribute vec4 a_position;
 varying $(type) v_varying[$(numTestType)];
 void main()
 {
     gl_Position = a_position;
     $(vcode)
 }
 </script>
 <script id="fshaderArrayTest" type="x-shader/x-fragment">
 precision mediump float;
 varying $(type) v_varying[$(numTestType)];
 void main()
 {
     gl_FragColor = $(fcode);
 }
 </script>
 <script id="vshaderVaryingTest" type="x-shader/x-fragment">
 attribute vec4 a_position;
 $(varyings)
 void main()
 {
     gl_Position = a_position;
     $(vcode)
 }
 </script>
 <script id="fshaderVaryingTest" type="x-shader/x-fragment">
 precision mediump float;
 $(varyings)
 void main()
 {
     gl_FragColor = $(fcode);
 }
 </script>
 <script>
 "use strict";
 description();
 debug("");
 var wtu = WebGLTestUtils;
 var gl = wtu.create3DContext("example");

 var varyingTypes = [
   { type: "float",       componentsPerRow: 1, rows: 1, vcode: "v_varying$(id)$(index) = 1.0;",              fcode: "vec4(v_varying$(id)$(index), 0, 0, 0)", },
   { type: "vec2",        componentsPerRow: 2, rows: 1, vcode: "v_varying$(id)$(index) = vec2(0, 0);",       fcode: "vec4(v_varying$(id)$(index), 0, 0)", },
   { type: "vec3",        componentsPerRow: 3, rows: 1, vcode: "v_varying$(id)$(index) = vec3(0, 0, 0);",    fcode: "vec4(v_varying$(id)$(index), 0)", },
   { type: "vec4",        componentsPerRow: 4, rows: 1, vcode: "v_varying$(id)$(index) = vec4(0, 0, 0, 0);", fcode: "vec4(v_varying$(id)$(index))", },
 // Yes, the spec says mat2 takes 4 columns, 2 rows.
   { type: "mat2",        componentsPerRow: 4, rows: 2, vcode: "v_varying$(id)$(index) = mat2(1.0);", fcode: "vec4(v_varying$(id)$(index)[0], 0, 0)", },
   { type: "mat3",        componentsPerRow: 3, rows: 3, vcode: "v_varying$(id)$(index) = mat3(1.0);", fcode: "vec4(v_varying$(id)$(index)[0], 0)", },
   { type: "mat4",        componentsPerRow: 4, rows: 4, vcode: "v_varying$(id)$(index) = mat4(1.0);", fcode: "vec4(v_varying$(id)$(index)[0])", },
 ];

 var vArrayTestSource = wtu.getScript("vshaderArrayTest");
 var fArrayTestSource = wtu.getScript("fshaderArrayTest");
 var vVaryingTestSource = wtu.getScript("vshaderVaryingTest");
 var fVaryingTestSource = wtu.getScript("fshaderVaryingTest");

 var minVaryingVectors = 8;
 var maxVaryingVectors = gl.getParameter(gl.MAX_VARYING_VECTORS);
 var tests = [];

 for (var ii = 0; ii < varyingTypes.length; ++ii) {
   var info = varyingTypes[ii];
   wtu.log("checking: " + info.type);
   // Compute the maximum amount of this type allowed in a single array.
   var numVars = Math.floor(maxVaryingVectors / info.rows);
   // Compute the minimum required to work in a single array.
   var minVars = Math.floor(minVaryingVectors / info.rows);
   // Compute the maximum allowed as single elements
   var numPerRow = Math.floor(4 / info.componentsPerRow);
   var numMax = Math.floor(maxVaryingVectors * numPerRow / info.rows);

   // Test array[1] of the type
   var vcode = wtu.replaceParams(info.vcode, {id: "", index: "[0]"});
   var fcode = wtu.replaceParams(info.fcode, {id: "", index: "[0]"});
   tests.push({
     vShaderSource: wtu.replaceParams(vArrayTestSource, {numTestType: 1, vcode: vcode}, info),
     vShaderSuccess: true,
     fShaderSource: wtu.replaceParams(fArrayTestSource, {numTestType: 1, fcode: fcode}, info),
     fShaderSuccess: true,
     linkSuccess: true,
     passMsg: "shaders with varying array of " + info.type + " with 1 element should succeed",
   });

   // Test required number of varyings
   var vcode = wtu.replaceParams(info.vcode, {id: "", index: "[" + (minVars - 1) + "]"});
   var fcode = wtu.replaceParams(info.fcode, {id: "", index: "[" + (minVars - 1) + "]"});
   tests.push({
     vShaderSource: wtu.replaceParams(vArrayTestSource, {numTestType: minVars, vcode: vcode}, info),
     vShaderSuccess: true,
     fShaderSource: wtu.replaceParams(fArrayTestSource, {numTestType: minVars, fcode: fcode}, info),
     fShaderSuccess: true,
     linkSuccess: true,
     passMsg: "shaders with varying array of " + info.type + " with " + minVars + " elements (the minimum required) should succeed",
   });

   // Test array[max + 1] accessing last element. WebGL requires this to fail.
   var vcode = wtu.replaceParams(info.vcode, {id: "", index: "[" + numVars + "]"});
   var fcode = wtu.replaceParams(info.fcode, {id: "", index: "[" + numVars + "]"});
   tests.push({
     vShaderSource: wtu.replaceParams(vArrayTestSource, {numTestType: numVars + 1, vcode: vcode}, info),
     vShaderSuccess: false,
     fShaderSource: wtu.replaceParams(fArrayTestSource, {numTestType: numVars + 1, fcode: fcode}, info),
     fShaderSuccess: false,
     linkSuccess: false,
     passMsg: "shaders with varying array of " + info.type + " with " + (numVars + 1) + " elements (one past maximum) accessing last element should fail",
   });

   // Test array[max + 1] accessing first element. WebGL requires this to fail but ES allows truncating array.
   var vcode = wtu.replaceParams(info.vcode, {id: "", index: "[0]"});
   var fcode = wtu.replaceParams(info.fcode, {id: "", index: "[0]"});
   tests.push({
     vShaderSource: wtu.replaceParams(vArrayTestSource, {numTestType: numVars + 1, vcode: vcode}, info),
     vShaderSuccess: false,
     fShaderSource: wtu.replaceParams(fArrayTestSource, {numTestType: numVars + 1, fcode: fcode}, info),
     fShaderSuccess: false,
     linkSuccess: false,
     passMsg: "shaders with varying array of " + info.type + " with " + (numVars + 1) + " elements (one past maximum) accessing first element should fail",
   });

   // Note: We can't test max varyings as actual GL drivers are only required to be able to
   // do the minimum number. After that it can fail for any reason, for example running out of
   // instruction space.

   var generateCode = function(numVars) {
     var varyings = [];
     var vcodes = [];
     var fcodes = [];
     for (var uu = 0; uu < numVars; ++uu) {
       varyings.push("    varying " + info.type + " v_varying" + uu + ";");
       vcodes.push(wtu.replaceParams(info.vcode, {id: uu, index: ""}));
       fcodes.push(wtu.replaceParams(info.fcode, {id: uu, index: ""}));
     }
     return {
       varyings: varyings.join("\n"),
       vcode: vcodes.join("\n            "),
       fcode: fcodes.join(" + \n            "),
     };
   };

   // Test max+1 varyings of type.
   tests.push({
     vShaderSource: wtu.replaceParams(vVaryingTestSource, generateCode(numMax + 1), info),
     vShaderSuccess: false,
     fShaderSource: wtu.replaceParams(fVaryingTestSource, generateCode(numMax + 1), info),
     fShaderSuccess: false,
     linkSuccess: false,
     passMsg: "shaders with " + (numMax + 1) + " varyings of " + info.type + " (one past maximum) should fail",
   });

   // Test required varyings of type.
   tests.push({
     vShaderSource: wtu.replaceParams(vVaryingTestSource, generateCode(minVars), info),
     vShaderSuccess: true,
     fShaderSource: wtu.replaceParams(fVaryingTestSource, generateCode(minVars), info),
     fShaderSuccess: true,
     linkSuccess: true,
     passMsg: "shaders with " + minVars + " varyings of " + info.type + " (the minimum required) should succeed",
   });
 }

 GLSLConformanceTester.runTests(tests);
 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 varying packing restrictions Conformance Test</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>
	<canvas id="example" width="2" height="2"> </canvas>
	<script id="vshaderArrayTest" type="x-shader/x-vertex">
	attribute vec4 a_position;
	varying $(type) v_varying[$(numTestType)];
	void main()
	{
	gl_Position = a_position;
	$(vcode)
	}
	</script>
	<script id="fshaderArrayTest" type="x-shader/x-fragment">
	precision mediump float;
	varying $(type) v_varying[$(numTestType)];
	void main()
	{
	gl_FragColor = $(fcode);
	}
	</script>
	<script id="vshaderVaryingTest" type="x-shader/x-fragment">
	attribute vec4 a_position;
	$(varyings)
	void main()
	{
	gl_Position = a_position;
	$(vcode)
	}
	</script>
	<script id="fshaderVaryingTest" type="x-shader/x-fragment">
	precision mediump float;
	$(varyings)
	void main()
	{
	gl_FragColor = $(fcode);
	}
	</script>
	<script>
	"use strict";
	description();
	debug("");
	var wtu = WebGLTestUtils;
	var gl = wtu.create3DContext("example");

	var varyingTypes = [
	{ type: "float", componentsPerRow: 1, rows: 1, vcode: "v_varying$(id)$(index) = 1.0;", fcode: "vec4(v_varying$(id)$(index), 0, 0, 0)", },
	{ type: "vec2", componentsPerRow: 2, rows: 1, vcode: "v_varying$(id)$(index) = vec2(0, 0);", fcode: "vec4(v_varying$(id)$(index), 0, 0)", },
	{ type: "vec3", componentsPerRow: 3, rows: 1, vcode: "v_varying$(id)$(index) = vec3(0, 0, 0);", fcode: "vec4(v_varying$(id)$(index), 0)", },
	{ type: "vec4", componentsPerRow: 4, rows: 1, vcode: "v_varying$(id)$(index) = vec4(0, 0, 0, 0);", fcode: "vec4(v_varying$(id)$(index))", },
	// Yes, the spec says mat2 takes 4 columns, 2 rows.
	{ type: "mat2", componentsPerRow: 4, rows: 2, vcode: "v_varying$(id)$(index) = mat2(1.0);", fcode: "vec4(v_varying$(id)$(index)[0], 0, 0)", },
	{ type: "mat3", componentsPerRow: 3, rows: 3, vcode: "v_varying$(id)$(index) = mat3(1.0);", fcode: "vec4(v_varying$(id)$(index)[0], 0)", },
	{ type: "mat4", componentsPerRow: 4, rows: 4, vcode: "v_varying$(id)$(index) = mat4(1.0);", fcode: "vec4(v_varying$(id)$(index)[0])", },
	];

	var vArrayTestSource = wtu.getScript("vshaderArrayTest");
	var fArrayTestSource = wtu.getScript("fshaderArrayTest");
	var vVaryingTestSource = wtu.getScript("vshaderVaryingTest");
	var fVaryingTestSource = wtu.getScript("fshaderVaryingTest");

	var minVaryingVectors = 8;
	var maxVaryingVectors = gl.getParameter(gl.MAX_VARYING_VECTORS);
	var tests = [];

	for (var ii = 0; ii < varyingTypes.length; ++ii) {
	var info = varyingTypes[ii];
	wtu.log("checking: " + info.type);
	// Compute the maximum amount of this type allowed in a single array.
	var numVars = Math.floor(maxVaryingVectors / info.rows);
	// Compute the minimum required to work in a single array.
	var minVars = Math.floor(minVaryingVectors / info.rows);
	// Compute the maximum allowed as single elements
	var numPerRow = Math.floor(4 / info.componentsPerRow);
	var numMax = Math.floor(maxVaryingVectors * numPerRow / info.rows);

	// Test array[1] of the type
	var vcode = wtu.replaceParams(info.vcode, {id: "", index: "[0]"});
	var fcode = wtu.replaceParams(info.fcode, {id: "", index: "[0]"});
	tests.push({
	vShaderSource: wtu.replaceParams(vArrayTestSource, {numTestType: 1, vcode: vcode}, info),
	vShaderSuccess: true,
	fShaderSource: wtu.replaceParams(fArrayTestSource, {numTestType: 1, fcode: fcode}, info),
	fShaderSuccess: true,
	linkSuccess: true,
	passMsg: "shaders with varying array of " + info.type + " with 1 element should succeed",
	});

	// Test required number of varyings
	var vcode = wtu.replaceParams(info.vcode, {id: "", index: "[" + (minVars - 1) + "]"});
	var fcode = wtu.replaceParams(info.fcode, {id: "", index: "[" + (minVars - 1) + "]"});
	tests.push({
	vShaderSource: wtu.replaceParams(vArrayTestSource, {numTestType: minVars, vcode: vcode}, info),
	vShaderSuccess: true,
	fShaderSource: wtu.replaceParams(fArrayTestSource, {numTestType: minVars, fcode: fcode}, info),
	fShaderSuccess: true,
	linkSuccess: true,
	passMsg: "shaders with varying array of " + info.type + " with " + minVars + " elements (the minimum required) should succeed",
	});

	// Test array[max + 1] accessing last element. WebGL requires this to fail.
	var vcode = wtu.replaceParams(info.vcode, {id: "", index: "[" + numVars + "]"});
	var fcode = wtu.replaceParams(info.fcode, {id: "", index: "[" + numVars + "]"});
	tests.push({
	vShaderSource: wtu.replaceParams(vArrayTestSource, {numTestType: numVars + 1, vcode: vcode}, info),
	vShaderSuccess: false,
	fShaderSource: wtu.replaceParams(fArrayTestSource, {numTestType: numVars + 1, fcode: fcode}, info),
	fShaderSuccess: false,
	linkSuccess: false,
	passMsg: "shaders with varying array of " + info.type + " with " + (numVars + 1) + " elements (one past maximum) accessing last element should fail",
	});

	// Test array[max + 1] accessing first element. WebGL requires this to fail but ES allows truncating array.
	var vcode = wtu.replaceParams(info.vcode, {id: "", index: "[0]"});
	var fcode = wtu.replaceParams(info.fcode, {id: "", index: "[0]"});
	tests.push({
	vShaderSource: wtu.replaceParams(vArrayTestSource, {numTestType: numVars + 1, vcode: vcode}, info),
	vShaderSuccess: false,
	fShaderSource: wtu.replaceParams(fArrayTestSource, {numTestType: numVars + 1, fcode: fcode}, info),
	fShaderSuccess: false,
	linkSuccess: false,
	passMsg: "shaders with varying array of " + info.type + " with " + (numVars + 1) + " elements (one past maximum) accessing first element should fail",
	});

	// Note: We can't test max varyings as actual GL drivers are only required to be able to
	// do the minimum number. After that it can fail for any reason, for example running out of
	// instruction space.

	var generateCode = function(numVars) {
	var varyings = [];
	var vcodes = [];
	var fcodes = [];
	for (var uu = 0; uu < numVars; ++uu) {
	varyings.push(" varying " + info.type + " v_varying" + uu + ";");
	vcodes.push(wtu.replaceParams(info.vcode, {id: uu, index: ""}));
	fcodes.push(wtu.replaceParams(info.fcode, {id: uu, index: ""}));
	}
	return {
	varyings: varyings.join("\n"),
	vcode: vcodes.join("\n "),
	fcode: fcodes.join(" + \n "),
	};
	};

	// Test max+1 varyings of type.
	tests.push({
	vShaderSource: wtu.replaceParams(vVaryingTestSource, generateCode(numMax + 1), info),
	vShaderSuccess: false,
	fShaderSource: wtu.replaceParams(fVaryingTestSource, generateCode(numMax + 1), info),
	fShaderSuccess: false,
	linkSuccess: false,
	passMsg: "shaders with " + (numMax + 1) + " varyings of " + info.type + " (one past maximum) should fail",
	});

	// Test required varyings of type.
	tests.push({
	vShaderSource: wtu.replaceParams(vVaryingTestSource, generateCode(minVars), info),
	vShaderSuccess: true,
	fShaderSource: wtu.replaceParams(fVaryingTestSource, generateCode(minVars), info),
	fShaderSuccess: true,
	linkSuccess: true,
	passMsg: "shaders with " + minVars + " varyings of " + info.type + " (the minimum required) should succeed",
	});
	}

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