add rendermode support for djvu documents

frontend/document/document.lua

@@ -128,7 +128,7 @@ function Document:getToc()
 	return self._document:getToc()
 end
 
-function Document:renderPage(pageno, rect, zoom, rotation)
+function Document:renderPage(pageno, rect, zoom, rotation, render_mode)
 	local hash = "renderpg|"..self.file.."|"..pageno.."|"..zoom.."|"..rotation
 	local page_size = self:getPageDimensions(pageno, zoom, rotation)
 	-- this will be the size we actually render
@@ -172,7 +172,7 @@ function Document:renderPage(pageno, rect, zoom, rotation)
 
 	-- render
 	local page = self._document:openPage(pageno)
-	page:draw(dc, tile.bb, size.x, size.y)
+	page:draw(dc, tile.bb, size.x, size.y, render_mode)
 	page:close()
 	Cache:insert(hash, tile)
 
@@ -185,7 +185,7 @@ function Document:hintPage(pageno, zoom, rotation)
 	self:renderPage(pageno, nil, zoom, rotation)
 end
 
-function Document:drawPage(target, x, y, rect, pageno, zoom, rotation)
+function Document:drawPage(target, x, y, rect, pageno, zoom, rotation, render_mode)
 	local hash_full_page = "renderpg|"..self.file.."|"..pageno.."|"..zoom.."|"..rotation
 	local hash_excerpt = "renderpg|"..self.file.."|"..pageno.."|"..zoom.."|"..rotation.."|"..tostring(rect)
 	local tile = Cache:check(hash_full_page)
@@ -193,7 +193,7 @@ function Document:drawPage(target, x, y, rect, pageno, zoom, rotation)
 		tile = Cache:check(hash_excerpt)
 		if not tile then
 			DEBUG("rendering")
-			tile = self:renderPage(pageno, rect, zoom, rotation)
+			tile = self:renderPage(pageno, rect, zoom, rotation, render_mode)
 		end
 	end
 	DEBUG("now painting", tile)

frontend/ui/reader/readerview.lua

@@ -9,8 +9,9 @@ ReaderView = WidgetContainer:new{
 		offset = {},
 		bbox = nil,
 	},
-
 	outer_page_color = 7,
+	-- DjVu page rendering mode (used in djvu.c:drawPage())
+	render_mode = 0, -- default to COLOR
 
 	visible_area = Geom:new{x = 0, y = 0},
 	page_area = Geom:new{},
@@ -41,7 +42,8 @@ function ReaderView:paintTo(bb, x, y)
 			self.visible_area,
 			self.state.page,
 			self.state.zoom,
-			self.state.rotation)
+			self.state.rotation,
+			self.render_mode)
 	else
 		self.ui.document:drawCurrentView(
 			bb,
@@ -88,6 +90,10 @@ function ReaderView:onSetDimensions(dimensions)
 	self:recalculate()
 end
 
+function ReaderView:onReadSettings(config)
+	self.render_mode = config:readSetting("render_mode") or 0
+end
+
 function ReaderView:onPageUpdate(new_page_no)
 	self.state.page = new_page_no
 	self:recalculate()
@@ -108,3 +114,6 @@ function ReaderView:onRotationUpdate(rotation)
 	self:recalculate()
 end
 
+function ReaderView:onCloseDocument()
+	self.ui.doc_settings:saveSetting("render_mode", self.render_mode)
+end