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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>Verifies EXIF orientation is respected when uploading images to WebGL textures</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/tests/tex-image-and-sub-image-utils.js"></script>
</head>
<body onload="run()">
<canvas id="c" width="256" height="256"></canvas>
<div id="description"></div>
<div id="console"></div>
<script>
"use strict";
description();
let wtu = WebGLTestUtils;
let tiu = TexImageUtils;
let canvas = document.getElementById("c");
let gl = wtu.create3DContext(canvas);
let program = tiu.setupTexturedQuad(gl, gl.RGBA);
const resourcePath = "../../../resources/";
const tolerance = 5;
// The locations are written assuming flipY = false. For flipY = true, y = 1.0-y.
const expectedColors = {
top: { location: [ 0.5, 0.25 ], color: [ 255, 0, 0 ] },
left: { location: [ 0.4, 0.5 ], color: [ 0, 0, 255 ] },
right: { location: [ 0.6, 0.5 ], color: [ 255, 255, 0 ] },
bottom: { location: [ 0.5, 0.75 ], color: [ 0, 255, 0 ] },
}
function output(str)
{
debug(str);
bufferedLogToConsole(str);
}
function checkPixels(flipY)
{
for (let place in expectedColors) {
let color = expectedColors[place];
let loc = color.location;
let x = loc[0];
let y = (flipY ? 1.0 - loc[1] : loc[1]);
output(" Checking " + place);
wtu.checkCanvasRect(gl, Math.floor(canvas.width * x), Math.floor(canvas.height * y), 1, 1,
color.color, "shouldBe " + color.color + " +/-" + tolerance, tolerance);
}
}
async function testImageBitmapFromBlobWithFlipY(blob, flipY)
{
let bitmap;
// As a concession to Firefox, which doesn't yet implement
// createImageBitmap with creation options, skip the tests
// involving flipY=true if ImageBitmap creation throws an
// exception, and use the single-argument constructor for the
// flipY=false case.
if (flipY) {
try {
bitmap = await createImageBitmap(blob, {imageOrientation: flipY});
} catch (e) {
output(" (createImageBitmap options not supported - skipping flipY=true case)");
return;
}
} else {
bitmap = await createImageBitmap(blob);
}
output(" Testing texImage2D, flipY = " + flipY);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, bitmap);
wtu.clearAndDrawUnitQuad(gl, [0, 0, 0, 255]);
checkPixels(flipY);
output(" Testing texSubImage2D, flipY = " + flipY);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, bitmap.width, bitmap.height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
gl.texSubImage2D(gl.TEXTURE_2D, 0, 0, 0, gl.RGBA, gl.UNSIGNED_BYTE, bitmap);
wtu.clearAndDrawUnitQuad(gl, [0, 0, 0, 255]);
checkPixels(flipY);
}
async function testImageBitmapFromBlob(filename)
{
let response = await fetch(resourcePath + filename);
let blob = await response.blob();
output("----------------------------------------------------------------");
output("Testing " + filename + " via ImageBitmap from Blob");
await testImageBitmapFromBlobWithFlipY(blob, true);
await testImageBitmapFromBlobWithFlipY(blob, false);
}
async function testImageElementWithFlipY(image, flipY)
{
output(" Testing texImage2D, flipY = " + flipY);
gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, flipY);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image);
wtu.clearAndDrawUnitQuad(gl, [0, 0, 0, 255]);
checkPixels(flipY);
output(" Testing texSubImage2D, flipY = " + flipY);
gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, flipY);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, image.width, image.height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
gl.texSubImage2D(gl.TEXTURE_2D, 0, 0, 0, gl.RGBA, gl.UNSIGNED_BYTE, image);
wtu.clearAndDrawUnitQuad(gl, [0, 0, 0, 255]);
checkPixels(flipY);
}
async function testImageElement(filename)
{
let image = new Image();
image.src = resourcePath + filename;
await image.decode();
output("----------------------------------------------------------------");
output("Testing " + filename + " via HTMLImageElement");
await testImageElementWithFlipY(image, true);
await testImageElementWithFlipY(image, false);
}
async function testSingleImage(filename)
{
await testImageBitmapFromBlob(filename);
await testImageElement(filename);
}
async function run()
{
let tex = gl.createTexture();
// Bind the texture to the default texture unit 0
gl.bindTexture(gl.TEXTURE_2D, tex);
// Set up texture parameters
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);
const filenames = [
"exif-orientation-test-1-normal.jpg",
"exif-orientation-test-2-mirror-horizontal.jpg",
"exif-orientation-test-3-rotate-180.jpg",
"exif-orientation-test-4-mirror-vertical.jpg",
"exif-orientation-test-5-mirror-horizontal-90-ccw.jpg",
"exif-orientation-test-6-90-ccw.jpg",
"exif-orientation-test-7-mirror-horizontal-90-cw.jpg",
"exif-orientation-test-8-90-cw.jpg",
];
for (let fn of filenames) {
await testSingleImage(fn);
}
finishTest();
}
var successfullyParsed = true;
</script>
</body>
</html>
|
