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2.4.1, all Apps, Windows: export dialog WebP preview, color/profile mismatch


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When exporting to WebP, the preview left hand does not show the exact colors. This is format specific. E.g. exporting to JPEG, PNG or TIFF shows the preview exactly like the original. On the other hand WebP, PSD or EPS show somewhat offset colors.

In this example (8bit, sRGB) you can see this in the sky blue tones in the upper left area.

WebP offset blue:

2024-03-28_publisher_webp-export-preview-color-mismatch_001.png.8f593b028aaaff753f682eea397982ea.png

JPEG ok:

2024-03-28_publisher_webp-export-preview-color-mismatch_002.png.172559bb22c567d1a5e9120b9449dd19.png

 

In the final WebP file that is saved, the colors are like in the original. But the preview is not only "for fun". When exporting for web i heavily rely on the preview, balancing image qualitiy vs. file size. The preview should show the exact output with the right target color profile applied.

 

Hardware: Windows 11 Pro (23H2, build 22631.3447, Windows Feature Experience Pack 1000.22688.1000.0), Intel(R) Core(TM) i9-14900K @3.20 GHz, 64 GB RAM, NVIDIA RTX A4000 (16GB VRAM, driver 551.61), 1TB + 2TB SSD. 1 Display set to native 2560 x 1440.
Software: Affinity v1 - Designer/Publisher/Photo (1.10.6.1665), Affinity v2 (universal license) - Designer/Publisher/Photo, v2 betas.

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