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bcade589e7
Follow the ImageBitmap specification and make cropping of the bitmap data to the source rectangle with formatting: https://html.spec.whatwg.org/multipage/#cropped-to-the-source-rectangle-with-formatting For now the next functionality not implemented: - image orientation support (such as EXIF metadata) - color space conversion (image, blob) The convertion from ResizeQuality to "image" FilterType: - pixelated/low/medium/high -> Nearest/Triangle/CatmullRom/Lanczos3 Other browsers use the following sample filtering: - chromium (skia): Nearest/Linear/Linear/CatmullRom - firefox (skia): Lanczos3 Testing: Improvements in the following WPT tests - html/canvas/element/manual/imagebitmap/* Fixes (partially): #34112 Signed-off-by: Andrei Volykhin <andrei.volykhin@gmail.com>
60 lines
1.6 KiB
Rust
60 lines
1.6 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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use euclid::default::Size2D;
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use pixels::flip_y_rgba8_image_inplace;
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const RED: [u8; 4] = [255, 0, 0, 255];
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const GREEN: [u8; 4] = [0, 255, 0, 255];
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const BLUE: [u8; 4] = [0, 0, 255, 255];
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const YELLOW: [u8; 4] = [255, 255, 0, 255];
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const COLORS: [[u8; 4]; 4] = [RED, GREEN, BLUE, YELLOW];
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fn create_rgba8_image(number_of_pixels: usize) -> Vec<u8> {
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(0..number_of_pixels)
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.map(|i| COLORS[i % 4])
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.flatten()
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.collect()
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}
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#[test]
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fn test_flip_y_rgba8_image_inplace() {
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// | R G | B Y | -> | B Y | R G |
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let mut image2x2 = create_rgba8_image(4);
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flip_y_rgba8_image_inplace(Size2D::new(2, 2), &mut image2x2);
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assert_eq!(
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&image2x2[0..4],
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&BLUE,
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"Expected blue color at [0, 0] (image2x2)"
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);
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assert_eq!(
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&image2x2[12..16],
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&GREEN,
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"Expected green color at [1, 1] (image2x2)"
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);
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// | R G B | Y R G | B Y R | -> | B Y R | Y R G | R G B |
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let mut image3x3 = create_rgba8_image(9);
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flip_y_rgba8_image_inplace(Size2D::new(3, 3), &mut image3x3);
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assert_eq!(
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&image3x3[0..4],
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&BLUE,
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"Expected blue color at [0, 0] (image3x3)"
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);
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assert_eq!(
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&image3x3[16..20],
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&RED,
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"Expected red color at [1, 1] (image3x3)"
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);
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assert_eq!(
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&image3x3[32..36],
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&BLUE,
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"Expected blue color at [2, 2] (image3x3)"
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);
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}
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