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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<link rel="stylesheet" href="../../resources/js-test-style.css"/>
<script src="../../resources/js-test-pre.js"></script>
<script src="../resources/webgl-test.js"></script>
<script src="../resources/webgl-test-utils.js"></script>
</head>
<body>
<div id="description"></div>
<div id="console"></div>
<canvas id="canvas" width="16" height="16" style="width: 50px; height: 50px; border: 1px solid black;"></canvas>
<!-- Shaders to test output -->
<script id="vertexShader" type="x-shader/x-vertex">
attribute vec4 aPosition;
void main() {
gl_Position = aPosition;
}
</script>
<script id="fragmentShader" type="x-shader/x-fragment">
precision mediump float;
uniform float uColor;
void main() {
gl_FragColor = vec4(uColor, uColor, uColor, 1);
}
</script>
<script>
"use strict";
var wtu = WebGLTestUtils;
var canvas;
var gl;
var ext = null;
function getExtension() {
ext = gl.getExtension("EXT_sRGB");
}
function listsExtension() {
var supported = gl.getSupportedExtensions();
return (supported.indexOf("EXT_sRGB") >= 0);
}
function readLocation(x, y) {
var pixel = new Uint8Array(1 * 1 * 4);
var px = Math.floor(x * canvas.drawingBufferWidth);
var py = Math.floor(y * canvas.drawingBufferHeight);
gl.readPixels(px, py, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, pixel);
return pixel;
}
function toVec3String(val) {
if (typeof(val) == 'number') {
return toVec3String([val, val, val]);
}
return '[' + val[0] + ', ' + val[1] + ', ' + val[2] + ']';
}
var e = 2; // Amount of variance to allow in result pixels - may need to be tweaked higher
function expectResult(target, successMessage, failureMessage) {
var anyDiffer = false;
var source = readLocation(0.5, 0.5);
for (var m = 0; m < 3; m++) {
if (Math.abs(source[m] - target) > e) {
anyDiffer = true;
testFailed(failureMessage + "; should be " + toVec3String(target) + ", was " + toVec3String(source));
break;
}
}
if (!anyDiffer) {
testPassed(successMessage);
}
}
function createGreySRGBATexture(gl, color) {
var numPixels = gl.drawingBufferWidth * gl.drawingBufferHeight;
var size = numPixels * 4;
var buf = new Uint8Array(size);
for (var ii = 0; ii < numPixels; ++ii) {
var off = ii * 3;
buf[off + 0] = color;
buf[off + 1] = color;
buf[off + 2] = color;
buf[off + 3] = 0xff;
}
var tex = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, tex);
gl.texImage2D(gl.TEXTURE_2D,
0,
ext.SRGB_ALPHA_EXT,
gl.drawingBufferWidth,
gl.drawingBufferHeight,
0,
ext.SRGB_ALPHA_EXT,
gl.UNSIGNED_BYTE,
buf);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
return tex;
}
function testValidFormat(fn, internalFormat, formatName) {
fn(internalFormat);
glErrorShouldBe(gl, gl.NO_ERROR, "was able to create type " + formatName);
}
function testInvalidFormat(fn, internalFormat, formatName) {
fn(internalFormat);
var err = gl.getError();
if (err == gl.NO_ERROR) {
testFailed("should NOT be able to create type " + formatName);
} else if (err == gl.INVALID_OPERATION) {
testFailed("should return gl.INVALID_ENUM for type " + formatName);
} else if (err == gl.INVALID_ENUM) {
testPassed("not able to create invalid format: " + formatName);
}
}
var textureFormatFixture = {
desc: "Checking texture formats",
create: function(format) {
var tex = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, tex);
gl.texImage2D(gl.TEXTURE_2D,
0, // level
format, // internalFormat
gl.drawingBufferWidth, // width
gl.drawingBufferHeight, // height
0, // border
format, // format
gl.UNSIGNED_BYTE, // type
null); // data
},
tests: [
{
desc: "Checking valid formats",
fn: testValidFormat,
formats: [ 'SRGB_EXT', 'SRGB_ALPHA_EXT' ]
},
{
desc: "Checking invalid formats",
fn: testInvalidFormat,
formats: [ 'SRGB8_ALPHA8_EXT' ]
}
]
};
var renderbufferFormatFixture = {
desc: "Checking renderbuffer formats",
create: function(format) {
var rbo = gl.createRenderbuffer();
gl.bindRenderbuffer(gl.RENDERBUFFER, rbo);
gl.renderbufferStorage(gl.RENDERBUFFER,
format,
gl.drawingBufferWidth,
gl.drawingBufferHeight);
},
tests: [
{
desc: "Checking valid formats",
fn: testValidFormat,
formats: [ 'SRGB8_ALPHA8_EXT' ]
},
{
desc: "Checking invalid formats",
fn: testInvalidFormat,
formats: [ 'SRGB_EXT', 'SRGB_ALPHA_EXT' ]
}
]
};
description("Test sRGB texture support");
debug("");
debug("Canvas.getContext");
canvas = document.getElementById("canvas");
gl = wtu.create3DContext(canvas);
if (!gl) {
testFailed("context does not exist");
} else {
testPassed("context exists");
debug("");
debug("Checking sRGB texture support");
// Query the extension and store globally so shouldBe can access it
ext = gl.getExtension("EXT_sRGB");
if (!ext) {
testPassed("No EXT_sRGB support -- this is legal");
runSupportedTest(false);
} else {
testPassed("Successfully enabled EXT_sRGB extension");
runSupportedTest(true);
gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);
runFormatTest(textureFormatFixture);
runFormatTest(renderbufferFormatFixture);
runTextureReadConversionTest();
runFramebufferTextureConversionTest();
runFramebufferRenderbufferConversionTest();
}
}
function runSupportedTest(extensionEnabled) {
if (listsExtension()) {
if (extensionEnabled) {
testPassed("EXT_sRGB listed as supported and getExtension succeeded");
} else {
testFailed("EXT_sRGB listed as supported but getExtension failed");
}
} else {
if (extensionEnabled) {
testFailed("EXT_sRGB not listed as supported but getExtension succeeded");
} else {
testPassed("EXT_sRGB not listed as supported and getExtension failed -- this is legal");
}
}
}
function runFormatTest(fixture) {
debug("");
debug(fixture.desc);
for (var tt = 0; tt < fixture.tests.length; ++tt) {
var test = fixture.tests[tt];
debug(test.desc);
for (var ii = 0; ii < test.formats.length; ++ii) {
var formatName = test.formats[ii];
test.fn(fixture.create, ext[formatName], "ext." + formatName);
}
if (tt != fixture.tests.length - 1)
debug("");
}
}
function runTextureReadConversionTest() {
debug("");
debug("Test the conversion of colors from sRGB to linear on texture read");
// Draw
var conversions = [
[ 0, 0 ],
[ 63, 13 ],
[ 127, 54 ],
[ 191, 133 ],
[ 255, 255 ]
];
var program = wtu.setupTexturedQuad(gl);
gl.uniform1i(gl.getUniformLocation(program, "tex2d"), 0);
for (var ii = 0; ii < conversions.length; ii++) {
var tex = createGreySRGBATexture(gl, conversions[ii][0]);
wtu.drawQuad(gl);
expectResult(conversions[ii][1],
"sRGBA texture read returned correct data",
"sRGBA texture read returned incorrect data");
}
}
function runFramebufferTextureConversionTest() {
debug("");
debug("Test the conversion of colors from linear to sRGB on framebuffer (texture) write");
var program = wtu.setupProgram(gl, ['vertexShader', 'fragmentShader'], ['aPosition'], [0]);
var tex = createGreySRGBATexture(gl, 0);
var fbo = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex, 0);
glErrorShouldBe(gl, gl.NO_ERROR);
shouldBe('gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, ext.FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING_EXT)', 'ext.SRGB_EXT');
glErrorShouldBe(gl, gl.NO_ERROR);
shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE");
// Draw
var conversions = [
[ 0, 0 ],
[ 13, 63 ],
[ 54, 127 ],
[ 133, 191 ],
[ 255, 255 ]
];
wtu.setupUnitQuad(gl, 0);
for (var ii = 0; ii < conversions.length; ii++) {
gl.uniform1f(gl.getUniformLocation(program, "uColor"), conversions[ii][0]/255.0);
wtu.drawQuad(gl, [0, 0, 0, 0]);
expectResult(conversions[ii][1],
"framebuffer (texture) read returned correct data",
"framebuffer (texture) read returned incorrect data");
}
glErrorShouldBe(gl, gl.NO_ERROR);
gl.bindFramebuffer(gl.FRAMEBUFFER, null);
}
function runFramebufferRenderbufferConversionTest() {
debug("");
debug("Test the conversion of colors from linear to sRGB on framebuffer (renderbuffer) write");
function createsRGBFramebuffer(gl, width, height) {
var rbo = gl.createRenderbuffer();
gl.bindRenderbuffer(gl.RENDERBUFFER, rbo);
gl.renderbufferStorage(gl.RENDERBUFFER, ext.SRGB8_ALPHA8_EXT, width, height);
glErrorShouldBe(gl, gl.NO_ERROR);
var fbo = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0,
gl.RENDERBUFFER, rbo);
glErrorShouldBe(gl, gl.NO_ERROR);
shouldBe('gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, ext.FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING_EXT)', 'ext.SRGB_EXT');
glErrorShouldBe(gl, gl.NO_ERROR);
shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE");
return fbo;
}
// Draw
var conversions = [
[ 0, 0 ],
[ 13, 63 ],
[ 54, 127 ],
[ 133, 191 ],
[ 255, 255 ]
];
var program = wtu.setupProgram(gl, ['vertexShader', 'fragmentShader'], ['aPosition'], [0]);
wtu.setupUnitQuad(gl, 0);
var fbo = createsRGBFramebuffer(gl, 4, 4);
for (var ii = 0; ii < conversions.length; ii++) {
gl.uniform1f(gl.getUniformLocation(program, "uColor"), conversions[ii][0]/255.0);
wtu.drawQuad(gl, [0, 0, 0, 0]);
expectResult(conversions[ii][1],
"framebuffer (renderbuffer) read returned the correct data",
"framebuffer (renderbuffer) read returned incorrect data");
}
glErrorShouldBe(gl, gl.NO_ERROR);
}
debug("");
var successfullyParsed = true;
</script>
<script>finishTest();</script>
</body>
</html>
|
