Brandon Thomas bf877411fb Render: picture brightness with contrast as PowerPoint combines them ... Brightness was added after the contrast stretch. Measured on PowerPoint's export of grey ramps (5 x 5 grid of -80..80% brightness and contrast): contrast scales about mid-grey (x(1+c) below zero, /(1-c) above) and brightness adds b * 255 scaled by (1 + cf) / 2, half before the stretch and half after; +40% brightness with +40% contrast maps black to 54, not 17. DeckCraft now matches the 25 ramps within 5 grey levels. Wild synthetic set: brightness/contrast grid 15.93 -> 13.36, recolour slide 8.74 -> 7.60. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>		2026-10-13 08:16:41 -04:00
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src	Render: picture brightness with contrast as PowerPoint combines them	2026-10-13 08:16:41 -04:00
tests/fixtures	Emoji: drawn in colour, with families, skin tones and flags joined (#278)	2026-10-12 17:48:51 -04:00
Cargo.toml	Transitions like PowerPoint: measured frame by frame and retuned (#366)	2026-10-13 05:31:13 -04:00