Ambient LED mode: some optimizations and bugfixes#645

Merged

frysee merged 7 commits intoLoveRetro:mainfrom

DrFlarp:ambient-speedup

Feb 17, 2026

Commits on Feb 17, 2026

ambient leds: remove second loop pass for more consistent cpu time

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frysee
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ambient leds: do not implicit cast to float for min() or max()

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frysee
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ambient leds: don't sample every pixel, blend result with previous frame to reduce ensuing flicker

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frysee
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ambient leds: move function call to 32bpp area for consistency between RGB565 and RGB888 cores

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frysee
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ambient leds: downsample to 7x7 instead of 8x8 to de-emphasize negative effects of scrolling 2D tiles

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frysee
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ambient leds: don't override user brightness setting

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frysee
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ambient leds: comments, cleanup

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