texture-offset-out-of-range.html

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Copyright (c) 2019 The Khronos Group Inc.

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<meta charset="utf-8">

<title>GLSL out-of-range texture offset 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>

<script src="../../js/glsl-conformance-test.js"></script>

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<body>

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

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<script id="vshaderInvalidOffset" type="x-shader/x-vertex">#version 300 es

in vec4 a_position;

in vec2 a_in0;

out vec2 v_texCoord;

void main()

    gl_Position = a_position;

    v_texCoord = a_in0;

</script>

<script id="fshaderInvalidOffset" type="x-shader/x-fragment">#version 300 es

precision mediump float;

in vec2 v_texCoord;

out vec4 my_FragColor;

uniform sampler2D u_sampler;

uniform int x;

void main() {

    my_FragColor = textureOffset(u_sampler, v_texCoord, ivec2(0, $(yoffset)));

</script>

<script type="application/javascript">

"use strict";

description("Out-of-range texture offset should not compile.");

var wtu = WebGLTestUtils;

var vshader = wtu.getScript('vshaderInvalidOffset');

var fshaderTemplate = wtu.getScript('fshaderInvalidOffset');

var gl = wtu.create3DContext(undefined, undefined, 2);

if (!gl) {

    testFailed("Unable to initialize WebGL 2.0 context.");

} else {

    var minOffset = gl.getParameter(gl.MIN_PROGRAM_TEXEL_OFFSET);

    var maxOffset = gl.getParameter(gl.MAX_PROGRAM_TEXEL_OFFSET);

    var shaderSrcValidMin = wtu.replaceParams(fshaderTemplate, {'yoffset': minOffset});

    var shaderSrcValidMax = wtu.replaceParams(fshaderTemplate, {'yoffset': maxOffset});

    var shaderSrcBelowMin = wtu.replaceParams(fshaderTemplate, {'yoffset': (minOffset - 1)});

    var shaderSrcAboveMax = wtu.replaceParams(fshaderTemplate, {'yoffset': (maxOffset + 1)});

    var shaderSrcDynamic = wtu.replaceParams(fshaderTemplate, {'yoffset': 'x'});

    GLSLConformanceTester.runTests([

        vShaderSource: vshader,

        fShaderSource: shaderSrcValidMin,

        fShaderSuccess: true,

        linkSuccess: true,

        passMsg: 'Minimum in-range texture offset should compile'

},

        vShaderSource: vshader,

        fShaderSource: shaderSrcValidMax,

        fShaderSuccess: true,

        linkSuccess: true,

        passMsg: 'Maximum in-range texture offset should compile'

},

        vShaderSource: vshader,

        fShaderSource: shaderSrcBelowMin,

        fShaderSuccess: false,

        linkSuccess: false,

        passMsg: 'Texture offset below minimum valid value should not compile'

},

        vShaderSource: vshader,

        fShaderSource: shaderSrcAboveMax,

        fShaderSuccess: false,

        linkSuccess: false,

        passMsg: 'Texture offset above maximum valid value should not compile'

},

        vShaderSource: vshader,

        fShaderSource: shaderSrcDynamic,

        fShaderSuccess: false,

        linkSuccess: false,

        passMsg: 'Dynamic texture offset should not compile'

    ], 2);

</script>

</body>

</html>