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fix(koreader): open the dashboard on reMarkable's 16-bit screen

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Draw dashboard thumbnails in RGB32 when the screen is RGB565. KOReader's
MuPDF scaler throws on RGB565, which crashed the first-run layout picker
and the widget previews on every reMarkable running under AppLoad.

Closes #1909
This commit is contained in:
neon
2026-10-24 21:06:40 +00:00
parent b9e5fe3a29
commit 70376ad866
2 changed files with 82 additions and 1 deletions
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koreader-plugin/bookorbit.koplugin/bookorbit_board_ui.lua
+5 -1
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@@ -856,7 +856,11 @@ function BoardUI.snapshot(key, full_w, full_h, w, h, build)
if not snapshot_cache[key] then
local Screen = require("device").screen
local Blitbuffer_ = require("ffi/blitbuffer")
local canvas = Blitbuffer_.new(full_w, full_h, Screen.bb:getType())
-- KOReader's MuPDF scaler keeps the 16-bit stride when it widens RGB565 and throws, so the
-- reMarkable's RGB565 screen draws its thumbnails in RGB32 instead.
local canvas_type = Screen.bb:getType()
if canvas_type == Blitbuffer_.TYPE_BBRGB16 then canvas_type = Blitbuffer_.TYPE_BBRGB32 end
local canvas = Blitbuffer_.new(full_w, full_h, canvas_type)
canvas:fill(INK.white)
-- Built in a sink of its own: a thumbnail's buttons are not tappable.
local widget = BoardUI.collectHits(build)