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@ -13,14 +13,14 @@ KoptDocument = Document:new{
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screen_size = Screen:getSize(),
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screen_dpi = Device:getModel() == "KindlePaperWhite" and 212 or 167,
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configurable = {
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font_size = 1.2,
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font_size = 1.0,
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page_margin = 0.06,
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line_spacing = 1.2,
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word_spacing = 0.15,
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quality = 1.0,
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text_wrap = 1,
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defect_size = 1.0,
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trim_page = 1,
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trim_page = 0,
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detect_indent = 1,
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multi_threads = 0,
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auto_straighten = 0,
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@ -90,20 +90,31 @@ function KoptDocument:getUsedBBox(pageno)
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local hash = "pgubbox|"..self.file.."|"..pageno
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local cached = Cache:check(hash)
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if cached then
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return cached.data
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return cached.ubbox
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end
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local page = self._document:openPage(pageno)
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local used = {}
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local native_dim = self:getNativePageDimensions(pageno)
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used.x, used.y, used.w, used.h = 0, 0, native_dim.w, native_dim.h
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Cache:insert(hash, CacheItem:new{ used })
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used.x0, used.y0, used.x1, used.y1 = page:getUsedBBox()
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local pwidth, pheight = page:getSize(self.dc_null)
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if used.x1 == 0 then used.x1 = pwidth end
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if used.y1 == 0 then used.y1 = pheight end
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-- clamp to page BBox
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if used.x0 < 0 then used.x0 = 0 end;
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if used.y0 < 0 then used.y0 = 0 end;
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if used.x1 > pwidth then used.x1 = pwidth end
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if used.y1 > pheight then used.y1 = pheight end
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--@TODO give size for cacheitem? 02.12 2012 (houqp)
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Cache:insert(hash, CacheItem:new{
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ubbox = used,
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})
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page:close()
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DEBUG("UsedBBox", used)
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return used
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elseif self.file_type == "djvu" then
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-- djvu does not support usedbbox, so fake it.
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local used = {}
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local native_dim = self:getNativePageDimensions(pageno)
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used.x, used.y, used.w, used.h = 0, 0, native_dim.w, native_dim.h
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used.x0, used.y0, used.x1, used.y1 = 0, 0, native_dim.w, native_dim.h
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return used
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end
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end
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@ -128,38 +139,38 @@ function KoptDocument:getKOPTContext(pageno)
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kc:setLineSpacing(self.configurable.line_spacing)
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kc:setWordSpacing(self.configurable.word_spacing)
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local bbox = self:getUsedBBox(pageno)
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kc:setBBox(bbox.x, bbox.y, bbox.w, bbox.h)
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kc:setBBox(bbox.x0, bbox.y0, bbox.x1, bbox.y1)
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return kc
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end
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-- calculates page dimensions
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function KoptDocument:getPageDimensions(pageno, zoom, rotation)
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-- check cached page size
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local hash = "pgrfsize|"..self.file.."|"..pageno
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local hash = "kctx|"..self.file.."|"..pageno
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local cached = Cache:check(hash)
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if not cached then
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DEBUG("Warnning: cannot determine page size before reflowing.")
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return Screen:getSize()
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local kc = self:getKOPTContext(pageno)
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local page = self._document:openPage(pageno)
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-- reflow page
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page:reflow(kc, 0)
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page:close()
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local fullwidth, fullheight = kc:getPageDim()
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DEBUG("page::reflowPage:", "fullwidth:", fullwidth, "fullheight:", fullheight)
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local page_size = Geom:new{ w = fullwidth, h = fullheight }
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-- cache reflowed page size and kc
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Cache:insert(hash, CacheItem:new{ kctx = kc })
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return page_size
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end
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DEBUG("Found cached page size on page", pageno, cached[1])
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return cached[1]
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DEBUG("Found cached koptcontex on page", pageno, cached)
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local fullwidth, fullheight = cached.kctx:getPageDim()
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local page_size = Geom:new{ w = fullwidth, h = fullheight }
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return page_size
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end
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function KoptDocument:renderPage(pageno, rect, zoom, rotation, render_mode)
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self.render_mode = render_mode
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local hash = "renderpg|"..self.file.."|"..pageno.."|"..zoom.."|"..rotation
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--local page_size = self:getPageDimensions(pageno, zoom, rotation)
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local kc = self:getKOPTContext(pageno)
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local page = self._document:openPage(pageno)
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-- reflow page
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page:reflow(kc, render_mode)
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local fullwidth, fullheight = kc:getPageDim()
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DEBUG("page::reflowPage:", "fullwidth:", fullwidth, "fullheight:", fullheight)
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local page_size = Geom:new{ w = fullwidth, h = fullheight }
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-- cache reflowed page size
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local pgrfsize_hash = "pgrfsize|"..self.file.."|"..pageno
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if not Cache:check(pgrfsize_hash) then
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Cache:insert(pgrfsize_hash, CacheItem:new{ page_size })
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end
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local page_size = self:getPageDimensions(pageno, zoom, rotation)
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-- this will be the size we actually render
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local size = page_size
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-- we prefer to render the full page, if it fits into cache
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@ -186,11 +197,16 @@ function KoptDocument:renderPage(pageno, rect, zoom, rotation, render_mode)
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}
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-- draw to blitbuffer
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page:rfdraw(kc, tile.bb)
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page:close()
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Cache:insert(hash, tile)
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return tile
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local kc_hash = "kctx|"..self.file.."|"..pageno
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local page = self._document:openPage(pageno)
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local cached = Cache:check(kc_hash)
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if cached then
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page:rfdraw(cached.kctx, tile.bb)
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page:close()
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Cache:insert(hash, tile)
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return tile
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end
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DEBUG("Error: cannot render page before reflowing.")
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end
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DocumentRegistry:addProvider("pdf", "application/pdf", KoptDocument)
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