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Add test for TEXTURE_MIN/MAG_FILTER and TEXTURE_MAX_ANISOTROPY.
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Addresses #3143.
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@kdashg
kdashg committed Oct 5, 2020
1 parent 6cf1e72 commit c78e7df
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3 changes: 2 additions & 1 deletion sdk/tests/conformance/textures/misc/00_test_list.txt
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Expand Up @@ -4,7 +4,7 @@ copy-tex-image-and-sub-image-2d.html
--min-version 1.0.2 copy-tex-image-2d-formats.html
--min-version 1.0.4 copy-tex-image-crash.html
--min-version 1.0.4 copytexsubimage2d-large-partial-copy-corruption.html
--min-version 1.0.4 copytexsubimage2d-subrects.html
--min-version 1.0.4 copytexsubimage2d-subrects.html
--min-version 1.0.4 cube-incomplete-fbo.html
--min-version 1.0.4 cube-map-uploads-out-of-order.html
--min-version 1.0.3 default-texture.html
Expand Down Expand Up @@ -38,6 +38,7 @@ texture-complete.html
--min-version 1.0.3 --max-version 1.9.9 texture-fakeblack.html
--min-version 1.0.2 --max-version 1.9.9 texture-formats-test.html
--min-version 1.0.2 texture-hd-dpi.html
--min-version 1.0.4 texture-min-mag-filter.html
texture-mips.html
--max-version 1.9.9 texture-npot-video.html
--max-version 1.9.9 texture-npot.html
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191 changes: 191 additions & 0 deletions sdk/tests/conformance/textures/misc/texture-min-mag-filter.html
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<!--
Copyright (c) 2020 The Khronos Group Inc.
Use of this source code is governed by an MIT-style license that can be
found in the LICENSE.txt file.
-->

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Test TEXTURE_MIN/MAG_FILTER and TEXTURE_MAX_ANISOTROPY</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>
</head>
<body>
<div id="description"></div>
<div id="console"></div>
<script>
"use strict";
description("Test TEXTURE_MIN/MAG_FILTER and TEXTURE_MAX_ANISOTROPY");
debug("");

var wtu = WebGLTestUtils;
var gl = wtu.create3DContext();

if (!gl) {
testFailed("WebGL context does not exist");
} else {
testPassed("WebGL context exists");

testFiltering();

debug('');
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "End of run");
}

function makeRgbaFramebuffer(gl, w, h) {
const tex = gl.createTexture();

let was = gl.getParameter(gl.TEXTURE_BINDING_2D);
gl.bindTexture(gl.TEXTURE_2D, tex);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, w, h, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
gl.bindTexture(gl.TEXTURE_2D, was);

const fb = gl.createFramebuffer();
was = gl.getParameter(gl.FRAMEBUFFER_BINDING);
gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0,
gl.TEXTURE_2D, tex, 0);
gl.bindFramebuffer(gl.FRAMEBUFFER, was);

return fb;
}

function testFiltering() {
const RED = [255, 0, 0, 255];
const GREEN = [0, 255, 0, 255];
const BLUE = [0, 0, 255, 255];
const DATA_LEVEL_0 = new Uint8Array([
RED[0], RED[1], RED[2], RED[3],
GREEN[0], GREEN[1], GREEN[2], GREEN[3],
GREEN[0], GREEN[1], GREEN[2], GREEN[3],
RED[0], RED[1], RED[2], RED[3],
]);

const DATA_LEVEL_1 = new Uint8Array([
BLUE[0], BLUE[1], BLUE[2], BLUE[3],
]);

const tex = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, tex);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 2, 2, 0, gl.RGBA, gl.UNSIGNED_BYTE, DATA_LEVEL_0);
gl.texImage2D(gl.TEXTURE_2D, 1, gl.RGBA, 1, 1, 0, gl.RGBA, gl.UNSIGNED_BYTE, DATA_LEVEL_1);

const VS = `
void main() {
gl_Position = vec4(0, 0, 0, 1);
gl_PointSize = 1.0;
}
`;
const FS = `
uniform sampler2D u_tex0;
precision mediump float;
void main() {
vec2 pos = gl_PointCoord - vec2(0.5);
pos.x *= 1.03;
pos += vec2(0.3);
gl_FragColor = texture2D(u_tex0, pos, -0.7);
//gl_FragColor.rg = pos;
}
`;

const prog = gl.createProgram();
let shader;
shader = gl.createShader(gl.VERTEX_SHADER);
gl.shaderSource(shader, VS);
gl.compileShader(shader);
gl.attachShader(prog, shader);

shader = gl.createShader(gl.FRAGMENT_SHADER);
gl.shaderSource(shader, FS);
gl.compileShader(shader);
gl.attachShader(prog, shader);

gl.linkProgram(prog);
gl.useProgram(prog);

// -

const fb = makeRgbaFramebuffer(gl, 1, 1);
gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
gl.viewport(0, 0, 1, 1);

const MAG = [
gl.NEAREST, gl.LINEAR
];
const MIN = [
{
filter: gl.NEAREST,
test: (r, g, b, a) => r && !g && !b,
}, {
filter: gl.LINEAR,
test: (r, g, b, a) => r && g && !b,
}, {
filter: gl.NEAREST_MIPMAP_NEAREST,
test: (r, g, b, a) => r && !g && !b,
}, {
// LINEAR, MIPMAP_NEAREST: Linear within mipmap that's nearest
filter: gl.LINEAR_MIPMAP_NEAREST,
test: (r, g, b, a) => r && g && !b,
}, {
// NEAREST, MIPMAP_LINEAR: The opposite
filter: gl.NEAREST_MIPMAP_LINEAR,
//test: (r, g, b, a) => r && !g && b,
// NEAREST_MIPMAP_LINEAR w/ anisotropy sometimes yields RED.
test: (r, g, b, a) => !g,
}, {
filter: gl.LINEAR_MIPMAP_LINEAR,
test: (r, g, b, a) => r && g && b,
},
];

const ANISO = [1];
const anisoExt = gl.getExtension('EXT_texture_filter_anisotropic');
if (anisoExt) {
ANISO.push(2);
}

for (const min of MIN) {
debug('\nmin: ' + wtu.glEnumToString(gl,min.filter));
for (const mag of MAG) {
debug(' mag: ' + wtu.glEnumToString(gl,mag));
for (const aniso of ANISO) {
debug(' aniso: ' + aniso);
const res = filtering_result(mag, min.filter, anisoExt, aniso);
debug(' res: ' + res);
const ok = min.test(res[0], res[1], res[2], res[3]);
if (ok) {
testPassed('Result was ' + res.toString());
} else {
testFailed('Result was ' + res.toString());
}
}
}
}
}

function filtering_result(mag, min, anisoExt, aniso) {
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, mag);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, min);
if (anisoExt) {
gl.texParameterf(gl.TEXTURE_2D, anisoExt.TEXTURE_MAX_ANISOTROPY_EXT, aniso);
}

gl.clearColor(0, 0, 0, 0);
gl.clear(gl.COLOR_BUFFER_BIT);
gl.drawArrays(gl.POINTS, 0, 1);

const data = new Uint8Array(4);
gl.readPixels(0, 0, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, data);
return data;
}

var successfullyParsed = true;
</script>
<script src="../../../js/js-test-post.js"></script>

</body>
</html>

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