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[fix] ReaderZooming: work around tiles that are too large (#4608)

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Zooms out until a page can fit in the cache. It's a bit ugly, but better than being stuck. Fixes #3491.
This commit is contained in:
Frans de Jonge
2019-02-21 11:38:19 +01:00
committed by GitHub
parent afa12ef8ce
commit ca6c7316e6
1 changed files with 20 additions and 0 deletions
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20
frontend/apps/reader/modules/readerzooming.lua
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@@ -1,3 +1,4 @@
local Cache = require("cache")
local InputContainer = require("ui/widget/container/inputcontainer")
local ConfirmBox = require("ui/widget/confirmbox")
local GestureRange = require("ui/gesturerange")
@@ -277,6 +278,25 @@ function ReaderZooming:getZoom(pageno)
elseif self.zoom_mode == "free" then
zoom = self.zoom
end
if zoom and zoom > 10 and not Cache:willAccept(zoom * (self.dimen.w * self.dimen.h + 64)) then
logger.dbg("zoom too large, adjusting")
while not Cache:willAccept(zoom * (self.dimen.w * self.dimen.h + 64)) do
if zoom > 100 then
zoom = zoom - 50
elseif zoom > 10 then
zoom = zoom - 5
elseif zoom > 1 then
zoom = zoom - 0.5
elseif zoom > 0.1 then
zoom = zoom - 0.05
else
zoom = zoom - 0.005
end
logger.dbg("new zoom: "..zoom)
if zoom < 0 then return 0 end
end
end
return zoom
end