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prepare for more elaborate caching policy

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we allow for bigger render buffers, so the cache now returns
the ID (hash) of the relevant cashed tile PLUS offsets into that
tile, pointing to the coordinates where the requested frame
has its origin.
This commit is contained in:
HW
2012-03-12 20:48:46 +01:00
parent 0e914c5fda
commit 86ff74acd6
1 changed files with 6 additions and 4 deletions
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10
unireader.lua
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@@ -189,7 +189,7 @@ function UniReader:draworcache(no, zoom, offset_x, offset_y, width, height, gamm
-- so give it more ttl.
self.cache[hash].ttl = self.cache_max_ttl
end
return hash
return hash, 0, 0
end
-- calculate a hash for our current state
@@ -358,12 +358,14 @@ end
-- render and blit a page
function UniReader:show(no)
local slot
local offset_x -- resulting display offset
local offset_y
if self.globalzoommode ~= self.ZOOM_BY_VALUE then
slot = self:draworcache(no,self.globalzoommode,self.offset_x,self.offset_y,width,height,self.globalgamma,self.globalrotate)
slot, offset_x, offset_y = self:draworcache(no,self.globalzoommode,self.offset_x,self.offset_y,width,height,self.globalgamma,self.globalrotate)
else
slot = self:draworcache(no,self.globalzoom,self.offset_x,self.offset_y,width,height,self.globalgamma,self.globalrotate)
slot, offset_x, offset_y = self:draworcache(no,self.globalzoom,self.offset_x,self.offset_y,width,height,self.globalgamma,self.globalrotate)
end
fb.bb:blitFullFrom(self.cache[slot].bb)
fb.bb:blitFrom(self.cache[slot].bb, 0, 0, offset_x, offset_y, width, height)
if self.rcount == self.rcountmax then
print("full refresh")
self.rcount = 1