renun/koreader
1
0
Fork 0
mirror of https://github.com/koreader/koreader.git synced 2025-08-10 00:52:38 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

add gamma correction for pdf/djvu reader

Browse Source
This commit is contained in:
chrox
2013-02-20 14:32:51 +08:00
parent df7f7714e4
commit 9efdefb22f
5 changed files with 36 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
frontend/document/document.lua
View File

@@ -56,6 +56,8 @@ Document = {
date = ""
},
GAMMA_NO_GAMMA = 1.0,
-- override bbox from orignal page's getUsedBBox
bbox = {},
@@ -182,8 +184,8 @@ function Document:getToc()
return self._document:getToc()
end
function Document:renderPage(pageno, rect, zoom, rotation, render_mode)
local hash = "renderpg|"..self.file.."|"..pageno.."|"..zoom.."|"..rotation.."|"..render_mode
function Document:renderPage(pageno, rect, zoom, rotation, gamma, render_mode)
local hash = "renderpg|"..self.file.."|"..pageno.."|"..zoom.."|"..rotation.."|"..gamma.."|"..render_mode
local page_size = self:getPageDimensions(pageno, zoom, rotation)
-- this will be the size we actually render
local size = page_size
@@ -198,7 +200,7 @@ function Document:renderPage(pageno, rect, zoom, rotation, render_mode)
return
end
-- only render required part
hash = "renderpg|"..self.file.."|"..pageno.."|"..zoom.."|"..rotation.."|"..render_mode.."|"..tostring(rect)
hash = "renderpg|"..self.file.."|"..pageno.."|"..zoom.."|"..rotation.."|"..gamma.."|"..render_mode.."|"..tostring(rect)
size = rect
end
@@ -223,6 +225,11 @@ function Document:renderPage(pageno, rect, zoom, rotation, render_mode)
dc:setOffset(0, page_size.h)
end
dc:setZoom(zoom)
if gamma ~= self.GAMMA_NO_GAMMA then
--DEBUG("gamma correction: ", gamma)
dc:setGamma(gamma)
end
-- render
local page = self._document:openPage(pageno)
@@ -235,10 +242,11 @@ end
-- a hint for the cache engine to paint a full page to the cache
-- TODO: this should trigger a background operation
function Document:hintPage(pageno, zoom, rotation, render_mode)
local hash_full_page = "renderpg|"..self.file.."|"..pageno.."|"..zoom.."|"..rotation.."|"..render_mode
function Document:hintPage(pageno, zoom, rotation, gamma, render_mode)
local hash_full_page = "renderpg|"..self.file.."|"..pageno.."|"..zoom.."|"..rotation.."|"..gamma.."|"..render_mode
if not Cache:check(hash_full_page) then
self:renderPage(pageno, nil, zoom, rotation, render_mode)
--DEBUG("hinting page", pageno)
self:renderPage(pageno, nil, zoom, rotation, gamma, render_mode)
end
end
@@ -250,15 +258,15 @@ Draw page content to blitbuffer.
@target: target blitbuffer
@rect: visible_area inside document page
--]]
function Document:drawPage(target, x, y, rect, pageno, zoom, rotation, render_mode)
local hash_full_page = "renderpg|"..self.file.."|"..pageno.."|"..zoom.."|"..rotation.."|"..render_mode
function Document:drawPage(target, x, y, rect, pageno, zoom, rotation, gamma, render_mode)
local hash_full_page = "renderpg|"..self.file.."|"..pageno.."|"..zoom.."|"..rotation.."|"..gamma.."|"..render_mode
local hash_excerpt = hash_full_page.."|"..tostring(rect)
local tile = Cache:check(hash_full_page)
if not tile then
tile = Cache:check(hash_excerpt)
if not tile then
DEBUG("rendering")
tile = self:renderPage(pageno, rect, zoom, rotation, render_mode)
tile = self:renderPage(pageno, rect, zoom, rotation, gamma, render_mode)
end
end
DEBUG("now painting", tile, rect)