Blitz - WPT: image-orientation-none-cross-origin-canvas.html

wpt / css / css-images / image-orientation / image-orientation-none-cross-origin-canvas.html

/css/css-images/image-orientation/image-orientation-none-cross-origin-canvas.html

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CSS Images Module Level 3: image-orientation: none</title>
<script src=/common/get-host-info.sub.js></script>
<link rel="author" title="Noam Rosenthal" href="mailto:noam@webkit.org">
<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/5165">
<link rel="match" href="reference/image-orientation-none-cross-origin-canvas-ref.html">
<style>
    img {display: none}
    canvas {
        width: 20px;
        height: 20px;
        margin: 10px;
    }
</style>
<script>
    const src1 = 'support/exif-orientation-1-ul.jpg';
    const src2 = 'support/exif-orientation-3-lr.jpg';
    function toCors(src) {
        return src.replace(new URL(src).origin, get_host_info().HTTP_REMOTE_ORIGIN)
    }
    function createImage({cors, src, orientation, shouldBeRotated}) {
        const img = document.createElement('img');
        img.src = src
        if (cors)
            img.src = toCors(img.src)
        img.style.imageOrientation = orientation
        img.style.display = 'none'
        img.dataset.shouldBeRotated = shouldBeRotated
        document.body.appendChild(img)
        return img
    }

    window.onload = () => {
        const images = [
            createImage({cors: true, src: src1, orientation: 'from-image', shouldBeRotated: false}),
            createImage({cors: true, src: src1, orientation: 'none', shouldBeRotated: false}),
            createImage({cors: true, src: src2, orientation: 'from-image', shouldBeRotated: true}),
            createImage({cors: true, src: src2, orientation: 'none', shouldBeRotated: true}),
            createImage({cors: false, src: src1, orientation: 'from-image', shouldBeRotated: false}),
            createImage({cors: false, src: src1, orientation: 'none', shouldBeRotated: false}),
            createImage({cors: false, src: src2, orientation: 'from-image', shouldBeRotated: true}),
            createImage({cors: false, src: src2, orientation: 'none', shouldBeRotated: false}),
        ]

        const dimension = 1

        images.forEach(image => {
            const canvas = document.createElement('canvas')
            canvas.width = canvas.height = dimension
            // The source of image-orientation preference for canvas drawImage
            // is currently not standardized.
            // See https://github.com/w3c/csswg-drafts/issues/4666
            canvas.style.imageOrientation = image.style.imageOrientation
            document.body.appendChild(canvas)
            const ctx = canvas.getContext('2d')
            const sx = image.dataset.shouldBeRotated === 'true' ? image.width * .8 : 0
            const sy = image.dataset.shouldBeRotated === 'true' ? image.height * .8 : 0
            ctx.drawImage(image, sx, sy, 1, 1, 0, 0, dimension, dimension)
        })
    }

</script>
</head>
<body>
    <p>You should see 8 green rectangles, no red.</p>
</body>
<script>
    [src1, src2].forEach(src => {
        const img = document.createElement('img')
        img.src = src
        const imgCors = document.createElement('img')
        imgCors.src = src
        imgCors.src = toCors(imgCors.src)
        document.body.appendChild(img)
        document.body.appendChild(imgCors)
    })
</script>
</html>

/css/css-images/image-orientation/reference/image-orientation-none-cross-origin-canvas-ref.html

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CSS Images Module Level 3: image-orientation: none</title>
<link rel="author" title="Noam Rosenthal" href="mailto:noam@webkit.org">
<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/5165">
<style>
    body {
        overflow: hidden;
        image-orientation: none;
    }
    img {display: none}
    canvas {
        width: 20px;
        height: 20px;
        margin: 10px;
    }
</style>
<body>
    <p>You should see 8 green rectangles, no red.</p>
</body>
<script>
    const img = document.createElement('img')
    img.src = '../support/exif-orientation-1-ul.jpg'

    document.body.appendChild(img)

    const dimension = 5
    window.onload = () => {
        for (let i = 0; i < 8; ++i) {
            const canvas = document.createElement('canvas')
            canvas.width = canvas.height = dimension
            const ctx = canvas.getContext('2d')
            ctx.drawImage(img, 0, 0)
            document.body.appendChild(canvas)
        }

    }
</script>
</head>
</html>