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estimate cache size of koptcontext

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This should fix #285.
This commit is contained in:
chrox
2013-09-26 14:51:27 +08:00
parent 46e58a4b87
commit ffd31613a5
1 changed files with 15 additions and 3 deletions
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18
frontend/document/koptinterface.lua
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@@ -8,6 +8,8 @@ KoptInterface = {
tessocr_data = "data",
ocr_lang = "eng",
ocr_type = 3, -- default 0, for more accuracy use 3
last_context_size = nil,
default_context_size = 1024*1024,
}
ContextCacheItem = CacheItem:new{}
@@ -253,11 +255,18 @@ function KoptInterface:getCachedContext(doc, pageno)
--self:logReflowDuration(pageno, dur)
local fullwidth, fullheight = kc:getPageDim()
DEBUG("reflowed page", pageno, "fullwidth:", fullwidth, "fullheight:", fullheight)
Cache:insert(kctx_hash, ContextCacheItem:new{ kctx = kc })
self.last_context_size = fullwidth * fullheight + 128 -- estimation
Cache:insert(kctx_hash, ContextCacheItem:new{
size = self.last_context_size,
kctx = kc
})
return kc
else
-- wait for background thread
return self:waitForContext(cached.kctx)
local kc = self:waitForContext(cached.kctx)
local fullwidth, fullheight = kc:getPageDim()
self.last_context_size = fullwidth * fullheight + 128 -- estimation
return kc
end
end
@@ -325,7 +334,10 @@ function KoptInterface:hintPage(doc, pageno, zoom, rotation, gamma, render_mode)
kc:setPreCache()
page:reflow(kc, 0)
page:close()
Cache:insert(kctx_hash, ContextCacheItem:new{ kctx = kc })
Cache:insert(kctx_hash, ContextCacheItem:new{
size = self.last_context_size or self.default_context_size,
kctx = kc,
})
end
end