288020 2025-02-19 15:52:56 -0800 [HDR] Add test infrastructure to enable HDR images in layout tests 2025-02-20 11:56:39 -0800 1 1 1 Unclassified WebKit Images WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 282299 1 sabouhallawa webkit-unassigned sabouhallawa webkit-bug-importer oldest_to_newest 2096108 0 sabouhallawa 2025-02-19 15:52:56 -0800 Two things will be added to support HDR images in layout tests: 1. An internal API called setHeadroomForTesting() will be added. The inputs are HTMLImageElement and a headroom as a float. This API will will override the image headroom value. So if we want to make an SDR image pretend to be an HDR image, we need to make call like this: internals.setHeadroomForTesting(image, 5); This API will eventually sets an std::optional<Headroom> member in BitmapImageSource. This setting will force the CALayer to be an HDR layer. Plus it will change the display of this image. 2. To test the display of the HDR image, BitmapImage::draw() will check if setHeadroomForTesting() was called for this image. And if this happened, it will display a golden rectangle regardless of the original contents. 2096109 1 webkit-bug-importer 2025-02-19 15:53:20 -0800 <rdar://problem/145173897> 2096113 2 sabouhallawa 2025-02-19 15:57:14 -0800 https://github.com/WebKit/WebKit/pull/40917 2096466 3 sabouhallawa 2025-02-20 11:56:39 -0800 Committed 290704@main (0f0ff23): https://commits.webkit.org/290704@main