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117 lines
4.0 KiB
Lua
117 lines
4.0 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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-- used in UniReader:showMenu()
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---[[
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function DJVUReader:_drawReadingInfo()
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local secs, usecs = util.gettime()
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local width, height = G_width, G_height
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local numpages = self.doc:getPages()
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local load_percent = self.pageno/numpages
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-- changed to be the same font group as originaly intended
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local face = Font:getFace("rifont", 20)
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--local page_width, page_height, page_dpi = self.doc:getOriginalPageSize(self.pageno)
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local page_width, page_height, page_dpi = self.doc:getPageInfo(self.pageno)
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-- display memory on top of page
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fb.bb:paintRect(0, 0, width, 40+6*2, 0)
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renderUtf8Text(fb.bb, 10, 15+6, face,
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"M: "..
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math.ceil( self.cache_current_memsize / 1024 ).."/"..math.ceil( self.cache_max_memsize / 1024 ).."k, "..
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math.ceil( self.doc:getCacheSize() / 1024 ).."/"..math.ceil( self.cache_document_size / 1024 ).."k, "..
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os.date("%a %d %b %Y %T")..
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" ["..BatteryLevel().."]", true)
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renderUtf8Text(fb.bb, 10, 15+6+22, face,
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"Gamma:"..tostring(self.globalgamma)..", "..
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tostring(page_width).."x"..tostring(page_height)..", "..
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tostring(page_dpi).."dpi", true)
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-- display reading progress on bottom of page
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local ypos = height - 50
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fb.bb:paintRect(0, ypos, width, 50, 0)
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ypos = ypos + 15
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local cur_section = self:getTocTitleOfCurrentPage()
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if cur_section ~= "" then
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cur_section = "Sec: "..cur_section
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end
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renderUtf8Text(fb.bb, 10, ypos+6, face,
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"Page: "..self.pageno.."/"..numpages.." "..cur_section, true)
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ypos = ypos + 15
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blitbuffer.progressBar(fb.bb, 10, ypos, width-20, 15,
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5, 4, load_percent, 8)
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local nsecs, nusecs = util.gettime()
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local diff = (nsecs - secs)*1000000 + nusecs - usecs
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print("DJVUReader:_drawReadingInfo(): "..tostring(diff).." us")
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end
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--]]
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