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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>WebGL OES_texture_half_float Conformance Tests</title>
<link rel="stylesheet" href="../../resources/js-test-style.css"/>
<script src="../../resources/desktop-gl-constants.js" type="text/javascript"></script>
<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>
<canvas id="canvas" style="width: 50px; height: 50px;"> </canvas>
<canvas id="canvas2d" style="width: 50px; height: 50px;"> </canvas>
<div id="console"></div>
<script id="testFragmentShader" type="x-shader/x-fragment">
precision mediump float;
uniform sampler2D tex;
uniform vec4 subtractor;
varying vec2 texCoord;
void main()
{
vec4 color = texture2D(tex, texCoord);
if (abs(color.r - subtractor.r) +
abs(color.g - subtractor.g) +
abs(color.b - subtractor.b) +
abs(color.a - subtractor.a) < 8.0) {
gl_FragColor = vec4(0.0, 1.0, 0.0, 1.0);
} else {
gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
}
}
</script>
<!-- Shaders for testing half-floating-point render targets -->
<script id="positionVertexShader" type="x-shader/x-vertex">
attribute vec4 vPosition;
void main()
{
gl_Position = vPosition;
}
</script>
<script id="floatingPointFragmentShader" type="x-shader/x-fragment">
void main()
{
gl_FragColor = vec4(10000.0, 10000.0, 10000.0, 10000.0);
}
</script>
<script>
"use strict"
description("This test verifies the functionality of OES_texture_half_float with null/non-null ArrayBufferView");
debug("");
var wtu = WebGLTestUtils;
var canvas = document.getElementById("canvas");
var colorCanvas = document.getElementById("canvas2d");
colorCanvas.width = 2;
colorCanvas.height = 2;
var ctx = colorCanvas.getContext("2d");
ctx.fillStyle = "rgb(255,0,0)";
ctx.fillRect(0, 0, 2, 2);
var gl = wtu.create3DContext(canvas);
// This constant must be defined in order to run the texture creation test without the extension enabled.
var halfFloatOESEnum = 0x8D61;
var ext = null;
if (!gl) {
testFailed("WebGL context does not exists");
} else {
testPassed("WebGL context exists");
// Verify that allocation of texture fails if extension is not enabled
runTextureCreationTest(false);
ext = gl.getExtension("OES_texture_half_float")
if (!ext) {
testPassed("No OES_texture_half_float support. This is legal");
} else {
testPassed("Successfully enabled OES_texture_half_float extension");
var program = wtu.setupTexturedQuad(gl);
// Check if creation of texture succeed's with various formats and null ArrayBufferView
var formats = [
{ format: gl.RGBA, expected: [255, 0, 0, 255], },
{ format: gl.RGB, expected: [255, 0, 0, 255], },
{ format: gl.LUMINANCE, expected: [255, 255, 255, 255], },
{ format: gl.ALPHA, expected: [ 0, 0, 0, 255], },
{ format: gl.LUMINANCE_ALPHA, expected: [255, 255, 255, 255], },
];
formats.forEach(function(f) {
runTextureCreationTest(true, f.format, null, f.expected);
});
// Texture creation should fail when passed with non-null ArrayBufferView
formats.forEach(function(f) {
var width = 2;
var height = 2;
var format = f.format;
// Float32Array
var float32Data = new Float32Array(width * height * getNumberOfChannels(format));
for (var ii = 0; ii < float32Data.length; ii++) {
float32Data[ii] = 1000;
}
runTextureCreationTest(true, format, float32Data);
// Int16Array
var int16Data = new Int16Array(width * height * getNumberOfChannels(format));
for (var ii = 0; ii < int16Data.length; ii++) {
int16Data[ii] = 1000;
}
runTextureCreationTest(true, format, int16Data);
// Uint16Array
var uint16Data = new Uint16Array(width * height * getNumberOfChannels(format));
for (var ii = 0; ii < uint16Data.length; ii++) {
uint16Data[ii] = 1000;
}
runTextureCreationTest(true, format, uint16Data);
});
// Check if attaching texture as FBO target succeeds (Not mandatory)
runRenderTargetTest();
// Check of getExtension() returns same object
runUniqueObjectTest();
}
}
function getNumberOfChannels(format)
{
if (format == gl.RGBA)
return 4;
else if (format == gl.RGB)
return 3;
else if (format == gl.LUMINANCE || format == gl.ALPHA)
return 1;
else if (format == gl.LUMINANCE_ALPHA)
return 2;
}
function getFormatName(format)
{
if (format == gl.RGBA)
return "RGBA";
else if (format == gl.RGB)
return "RGB";
else if (format == gl.LUMINANCE)
return "LUMINANCE";
else if (format == gl.ALPHA)
return "ALPHA";
else if (format == gl.LUMINANCE_ALPHA)
return "LUMINANCE_ALPHA";
}
function allocateTexture()
{
var texture = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, texture);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_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);
glErrorShouldBe(gl, gl.NO_ERROR, "texture parameter setup should succeed");
return texture;
}
function runTextureCreationTest(extensionEnabled, opt_format, opt_data, opt_expected)
{
var format = opt_format || gl.RGBA;
var data = opt_data || null;
var expectSuccess = true;
if (!extensionEnabled || data)
expectSuccess = false;
debug("Testing texture creation with extension " + (extensionEnabled ? "enabled" : "disabled") +
", format " + getFormatName(format) + ", and data " + (data ? "non-null" : "null") +
". Expect " + (expectSuccess ? "Success" : "Failure"));
var texture = allocateTexture();
var width = 2;
var height = 2;
gl.texImage2D(gl.TEXTURE_2D, 0, format, width, height, 0, format, halfFloatOESEnum, data);
if(!extensionEnabled) {
glErrorShouldBe(gl, gl.INVALID_ENUM, "Half floating point texture must be diallowed if OES_texture_half_float isn't enabled");
return;
} else if (data) {
glErrorShouldBe(gl, gl.INVALID_OPERATION, "Half floating point texture allocation must be diallowed when ArrayBufferView is not-null");
return;
} else {
glErrorShouldBe(gl, gl.NO_ERROR, "Half floating point texture allocation should succeed if OES_texture_half_float is enabled");
gl.texImage2D(gl.TEXTURE_2D, 0, format, format, halfFloatOESEnum, colorCanvas);
wtu.clearAndDrawUnitQuad(gl);
wtu.checkCanvas(gl, opt_expected);
// Check that linear fails.
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
wtu.clearAndDrawUnitQuad(gl);
wtu.checkCanvas(gl, [0, 0, 0, 255], "should be black");
}
}
function checkRenderingResults()
{
wtu.checkCanvas(gl, [0, 255, 0, 255], "should be green");
}
function runRenderTargetTest(testProgram)
{
debug("");
debug("Testing half floating point render target");
var texture = allocateTexture();
var width = 2;
var height = 2;
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, width, height, 0, gl.RGBA, ext.HALF_FLOAT_OES, null);
glErrorShouldBe(gl, gl.NO_ERROR, "Half floating point texture allocation should succeed if OES_texture_half_float is enabled");
// Try to use this texture as render target
var fbo = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, texture, 0);
gl.bindTexture(gl.TEXTURE_2D, null);
// It is legal for a WebGL implementation exposing the OES_texture_half_float extension to
// support half floating point textures but not as attachments to framebuffer objects.
if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) {
debug("Half floating point render targets not supported -- this is legal");
return;
}
var renderProgram =
wtu.setupProgram(gl,
["positionVertexShader", "floatingPointFragmentShader"],
['vPosition'],
[0]);
wtu.drawUnitQuad(gl);
glErrorShouldBe(gl, gl.NO_ERROR, "Rendering to half floating point texture should succeed");
// Now sample from the half floating-point texture and verify we got the correct values.
var texturedShaders = [
wtu.setupSimpleTextureVertexShader(gl),
"testFragmentShader"
];
var testProgram =
wtu.setupProgram(gl,
[wtu.setupSimpleTextureVertexShader(gl), "testFragmentShader"],
['vPosition', 'texCoord0'],
[0, 1]);
var quadParameters = wtu.setupUnitQuad(gl, 0, 1);
gl.bindFramebuffer(gl.FRAMEBUFFER, null);
gl.bindTexture(gl.TEXTURE_2D, texture);
gl.useProgram(testProgram);
gl.uniform4fv(gl.getUniformLocation(testProgram, "subtractor"), [10000, 10000, 10000, 10000]);
wtu.drawUnitQuad(gl);
glErrorShouldBe(gl, gl.NO_ERROR, "rendering from half floating point texture should succeed");
checkRenderingResults();
}
function runUniqueObjectTest()
{
debug("Testing that getExtension() returns the same object each time");
gl.getExtension("OES_texture_half_float").myProperty = 2;
gc();
shouldBe('gl.getExtension("OES_texture_half_float").myProperty', '2');
}
debug("");
var successfullyParsed = true;
</script>
<script src="../../resources/js-test-post.js"></script>
</body>
</html>