shaders-with-mis-matching-varyings.html

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<title>WebGL GLSL Conformance Tests</title>

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<div id="description"></div>

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<script id="vertexShader" type="text/something-not-javascript">

// Shaders with mis-matching varying types should fail

// GLSL 1.0.17 4.3.5

attribute $(type) a_attribute;

varying $(type) v_varying;

void main()

    v_varying = a_attribute;

    gl_Position = vec4(0,0,0,0);

</script>

<script id="fragmentShader" type="text/something-not-javascript">

// Shaders with mis-matching varyings types should fail

// GLSL 1.0.17 4.3.5

precision mediump float;

varying $(type) v_varying;

void main()

    gl_FragColor = $(code);

</script>

<script>

"use strict";

var wtu = WebGLTestUtils;

var varyingTypes = [

  { type: "float", code: "vec4(v_varying, 0, 0, 0)", },

  { type: "vec2",  code: "vec4(v_varying, 0, 0)", },

  { type: "vec3",  code: "vec4(v_varying, 0)", },

  { type: "vec4",  code: "vec4(v_varying)", },

  { type: "mat2",  code: "vec4(v_varying[0][0], 0, 0, 0)", },

  { type: "mat3",  code: "vec4(v_varying[0][0], 0, 0, 0)", },

  { type: "mat4",  code: "vec4(v_varying[0][0], 0, 0, 0)", },

];

var vSource = wtu.getScript("vertexShader");

var fSource = wtu.getScript("fragmentShader");

var tests = [];

for (var ii = 0; ii < varyingTypes.length; ++ii) {

  var u1 = varyingTypes[ii];

  var vs = wtu.replaceParams(vSource, u1);

  for (var jj = ii + 1; jj < varyingTypes.length; ++jj) {

    var u2 = varyingTypes[jj];

    var fs = wtu.replaceParams(fSource, u2);

    tests.push({

      vShaderSource: vs,

      vShaderSuccess: true,

      fShaderSource: fs,

      fShaderSuccess: true,

      linkSuccess: false,

      passMsg: "vertex shader with varying " + u1.type + " and fragment shader with varying " + u2.type + " with the same name should fail to link",

});

GLSLConformanceTester.runTests(tests);

var successfullyParsed = true;

</script>

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