44 lines
No EOL
2.1 KiB
JavaScript
44 lines
No EOL
2.1 KiB
JavaScript
/*
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Copyright (c) 2019 The Khronos Group Inc.
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Use of this source code is governed by an MIT-style license that can be
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found in the LICENSE.txt file.
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*/
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"use strict";
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var runBindAttribLocationAliasingTest = function(wtu, gl, glFragmentShader, vertexShaderTemplate) {
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var typeInfo = [
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{ type: 'float', asVec4: 'vec4(0.0, $(var), 0.0, 1.0)' },
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{ type: 'vec2', asVec4: 'vec4($(var), 0.0, 1.0)' },
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{ type: 'vec3', asVec4: 'vec4($(var), 1.0)' },
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{ type: 'vec4', asVec4: '$(var)' },
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];
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var maxAttributes = gl.getParameter(gl.MAX_VERTEX_ATTRIBS);
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// Test all type combinations of a_1 and a_2.
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typeInfo.forEach(function(typeInfo1) {
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typeInfo.forEach(function(typeInfo2) {
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debug('attribute_1: ' + typeInfo1.type + ' attribute_2: ' + typeInfo2.type);
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var replaceParams = {
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type_1: typeInfo1.type,
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type_2: typeInfo2.type,
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gl_Position_1: wtu.replaceParams(typeInfo1.asVec4, {var: 'a_1'}),
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gl_Position_2: wtu.replaceParams(typeInfo2.asVec4, {var: 'a_2'})
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};
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var strVertexShader = wtu.replaceParams(vertexShaderTemplate, replaceParams);
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var glVertexShader = wtu.loadShader(gl, strVertexShader, gl.VERTEX_SHADER);
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assertMsg(glVertexShader != null, "Vertex shader compiled successfully.");
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// Bind both a_1 and a_2 to the same position and verify the link fails.
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// Do so for all valid positions available.
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for (var l = 0; l < maxAttributes; l++) {
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var glProgram = gl.createProgram();
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gl.bindAttribLocation(glProgram, l, 'a_1');
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gl.bindAttribLocation(glProgram, l, 'a_2');
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gl.attachShader(glProgram, glVertexShader);
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gl.attachShader(glProgram, glFragmentShader);
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gl.linkProgram(glProgram);
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var linkStatus = gl.getProgramParameter(glProgram, gl.LINK_STATUS);
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assertMsg(!linkStatus, "Link should fail when both attributes are aliased to location " + l);
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}
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});
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});
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}; |