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Speed up Model pi3a+ SPI speeds for coalescing decisions #206

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Merged
sastraxi merged 3 commits into from
Jul 18, 2026
+4 −0
Merged

Speed up Model pi3a+ SPI speeds for coalescing decisions #206

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c8f086f
WIP
sastraxi Jul 13, 2026
c72bb32
Merge branch 'main' into perf/pi3-spi
sastraxi Jul 14, 2026
5aaea88
Merge branch 'main' into perf/pi3-spi
sastraxi Jul 17, 2026
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4 changes: 4 additions & 0 deletions uilib/panel.py
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Expand Up @@ -353,6 +353,10 @@ def __init__(
# and the offset remains 0,0 (don't try to scroll)
if box is None:
box = Box((0, 0), lcd.dimensions())
# The root stays opaque even when dimming. It is a blend *destination*:
# 32-bit keeps full 8-bit blend precision, but a dest alpha channel buys
# nothing, and an SRCALPHA root would force the LCD's 565 convert-blit
# down SDL's alpha-blending path (~7x slower).
if image_format is None:
image_format = lcd.default_format()

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