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2. When changing DjVu page rendering mode there is no need to clear DjVu cache, only our own tile cache.
72 lines
2.3 KiB
Lua
72 lines
2.3 KiB
Lua
require "unireader"
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DJVUReader = UniReader:new{}
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-- open a DJVU file and its settings store
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-- DJVU does not support password yet
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function DJVUReader:open(filename)
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local ok
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ok, self.doc = pcall(djvu.openDocument, filename, self.cache_document_size)
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if not ok then
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return ok, self.doc -- this will be the error message instead
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end
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return ok
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end
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function DJVUReader:init()
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self:addAllCommands()
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self:adjustDjvuReaderCommand()
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end
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function DJVUReader:adjustDjvuReaderCommand()
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self.commands:del(KEY_J, MOD_SHIFT, "J")
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self.commands:del(KEY_K, MOD_SHIFT, "K")
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self.commands:add(KEY_R, nil, "R",
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"select djvu page rendering mode",
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function(self)
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self:select_render_mode()
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end)
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end
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-- select the rendering mode from those supported by djvulibre.
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-- Note that if the values in the definition of ddjvu_render_mode_t in djvulibre/libdjvu/ddjvuapi.h change,
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-- then we should update our values here also. This is a bit risky, but these values never change, so it should be ok :)
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function DJVUReader:select_render_mode()
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local mode_menu = SelectMenu:new{
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menu_title = "Select DjVu page rendering mode",
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item_array = {
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"COLOUR (works for both colour and b&w pages)", -- 0 (colour page or stencil)
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"BLACK & WHITE (for b&w pages only, much faster)", -- 1 (stencil or colour page)
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"COLOUR ONLY (slightly faster than COLOUR)", -- 2 (colour page or fail)
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"MASK ONLY (for b&w pages only)", -- 3 (stencil or fail)
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"COLOUR BACKGROUND (show only background)", -- 4 (colour background layer)
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"COLOUR FOREGROUND (show only foreground)" -- 5 (colour foreground layer)
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},
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current_entry = self.render_mode,
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}
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local mode = mode_menu:choose(0, fb.bb:getHeight())
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if mode then
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self.render_mode = mode - 1
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self:clearCache()
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end
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self:redrawCurrentPage()
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end
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----------------------------------------------------
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-- highlight support
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----------------------------------------------------
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function DJVUReader:getText(pageno)
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return self.doc:getPageText(pageno)
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end
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-- for incompatible API fixing
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function DJVUReader:invertTextYAxel(pageno, text_table)
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local _, height = self.doc:getOriginalPageSize(pageno)
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for _,text in pairs(text_table) do
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for _,line in ipairs(text) do
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line.y0, line.y1 = (height - line.y1), (height - line.y0)
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end
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end
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return text_table
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end
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