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Fix crash with kopt semi-auto crop on blank page

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When such blank page has only a few black pixels (dust), it would result in
a really small cropped area, than when scaled to fit screen, would cause a
crash with :
    ./ffi/mupdf.lua:63: could not allocate pixmap:
         malloc of array (451342 x 612558 bytes) failed (integer overflow) (1)
Fix similar to what is done in KoptInterface:getAutoBBox(): when cropped area too small,
fall back to whole page (or here: to user's manually set area).
This commit is contained in:
poire-z 2017-04-22 15:40:10 +02:00 committed by Frans de Jonge
parent a192178bf6
commit 76f6b49731
1 changed files with 5 additions and 0 deletions
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5
frontend/document/koptinterface.lua
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@ -180,6 +180,11 @@ function KoptInterface:getSemiAutoBBox(doc, pageno)
auto_bbox.x1 = auto_bbox.x1 + bbox.x0
auto_bbox.y1 = auto_bbox.y1 + bbox.y0
logger.dbg("Semi-auto detected bbox", auto_bbox)
local native_size = Document.getNativePageDimensions(doc, pageno)
if (auto_bbox.x1 - auto_bbox.x0)/native_size.w < 0.1 and (auto_bbox.y1 - auto_bbox.y0)/native_size.h < 0.1 then
logger.dbg("Semi-auto detected bbox too small, using manual bbox")
auto_bbox = bbox
end
page:close()
Cache:insert(hash, CacheItem:new{ semiautobbox = auto_bbox })
kc:free()