--[[ Copyright (C) 2011 Hans-Werner Hilse This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . ]]-- --[[ Codes for rotation modes: 1 for no rotation, 2 for landscape with bottom on the right side of screen, etc. 2 +--------------+ | +----------+ | | | | | | | Freedom! | | | | | | | | | | 3 | | | | 1 | | | | | | | | | +----------+ | | | | | +--------------+ 0 --]] Screen = { cur_rotation_mode = 0, -- these two variabls are used to help switching from framework to reader native_rotation_mode = nil, kpv_rotation_mode = nil, saved_bb = nil, } -- @orien: 1 for clockwise rotate, -1 for anti-clockwise -- Remember to reread screen resolution after this function call function Screen:screenRotate(orien) if orien == "clockwise" then orien = -1 elseif orien == "anticlockwise" then orien = 1 else return end self.cur_rotation_mode = (self.cur_rotation_mode + orien) % 4 -- you have to reopen framebuffer after rotate fb:setOrientation(self.cur_rotation_mode) fb:close() fb = einkfb.open("/dev/fb0") end function Screen:updateRotationMode() if KEY_FW_DOWN == 116 then -- in EMU mode always set to 0 self.cur_rotation_mode = 0 else orie_fd = assert(io.open("/sys/module/eink_fb_hal_broads/parameters/bs_orientation", "r")) updown_fd = assert(io.open("/sys/module/eink_fb_hal_broads/parameters/bs_upside_down", "r")) self.cur_rotation_mode = orie_fd:read() + (updown_fd:read() * 2) end end function Screen:saveCurrentBB() local width, height = G_width, G_height if not self.saved_bb then self.saved_bb = Blitbuffer.new(width, height) end if self.saved_bb:getWidth() ~= width then self.saved_bb:free() self.saved_bb = Blitbuffer.new(width, height) end self.saved_bb:blitFullFrom(fb.bb) end function Screen:restoreFromSavedBB() self:restoreFromBB(self.saved_bb) end function Screen:getCurrentScreenBB() local bb = Blitbuffer.new(G_width, G_height) bb:blitFullFrom(fb.bb) return bb end function Screen:restoreFromBB(bb) if bb then fb.bb:blitFullFrom(bb) else Debug("Got nil bb in restoreFromSavedBB!") end end function Screen:screenshot() lfs.mkdir("./screenshots") local start = os.clock() --showInfoMsgWithDelay("making screenshot... ", 1000, 1) self:BMP(lfs.currentdir().."/screenshots/"..os.date("%Y%m%d%H%M%S")..".bmp", "bzip2 ") -- fastest for 4bpp devices --self:PGM(lfs.currentdir().."/screenshots/"..os.date("%Y%m%d%H%M%S")..".pgm", "bzip2 ",8) -- fastest for 8bpp devices showInfoMsgWithDelay(string.format("Screenshot is ready in %.2f(s) ", os.clock()-start), 1000, 1) end -- NuPogodi (02.07.2012): added the functions to save the fb-content in common graphic files - bmp & pgm. -- todo: to look for the arm-compiled bmp2png converter & to use it instead of the current bzip2-packer. function Screen:LE(i) -- returns value in the little-endian binary sequence (4chars) local j=i%256 -- lowest byte return string.char(0,0,j,(i-j)/256) end --[[ This function saves the 4bpp framebuffer as 4bpp BMP and, if necessary, packes the output by command os.execute(pack..fn). Since framebuffer enumerates the lines from top to bottom and the bmp-file does it in the inversed order, the process includes a vertical flip that makes it a bit slower - ~0.15(s) @ Kindle3 & Kindle2. NB: needs free memory of G_width*G_height/2 bytes to manupulate the fb-content! ]] function Screen:BMP(fn, pack) -- for 4bpp framebuffers only local inputf = assert(io.open("/dev/fb0","rb")) if inputf then local outputf, size = assert(io.open(fn,"wb")) if math.max(G_width,G_height)>1000 then -- KDX(G) size=string.char(0x98,0x8D,7,0) -- 0x00,0x72,0x06,0x00 > raw bytes in image 825*1200/2 = 0x00078D98 @ KDX(G) else -- 600x800 size=string.char(0x80,0xA9,3,0) -- 0x80,0xA9,0x03,0x00 > raw bytes in image 600*800/2 = 0x0003A980 @ K2&3 end -- writing bmp-header outputf:write(string.char(0x42,0x4D,0xF6,0xA9,3,0,0,0,0,0,0x76,0,0,0,40,0), self:LE(G_width), self:LE(G_height), -- width & height: 4 chars each string.char(0,0,1,0,4,0,0,0,0,0), size, string.char(0x87,0x19,0,0,0x87,0x19,0,0), -- 0x87,0x19,0x00,0x00 = 6536 pix/m = 166 dpi - resolution_x, res_y string.char(16,0,0,0,0,0,0,0)) -- 16 colors local line, i = G_width/2, 15 -- add palette to bmp-header while i>=0 do outputf:write(string.char(i*16+i):rep(3), string.char(0)) i=i-1 end -- read the fb-content line-by-line & fill the content-table in the inversed order local content = {} for i=1, G_height do table.insert(content, 1, inputf:read(line)) end -- write the v-flipped bmp-data for i=1, G_height do outputf:write(content[i]) end inputf:close() outputf:close() if pack then os.execute(pack..fn) end end end --[[ This function saves the fb-content (both 4bpp and 8bpp) as 8bpp PGM and pack it. It's relatively slow for 4bpp devices (~2.5s on Kindle3, 600x800, 4bpp), but should be extremely fast (<0.1s) when no 4bbp to 8bpp is needed. ]] function Screen:PGM(fn, pack, bpp) local inputf = assert(io.open("/dev/fb0","rb")) if inputf then local outputf = assert(io.open(fn,"wb")) outputf:write("P5\n\# Created by kindlepdfviewer\n"..G_width.." "..G_height.."\n255\n") if bpp == 8 then -- needs free memory of G_width*G_height bytes! outputf:write(inputf:read("*all")) else -- convert 4bpp to 8bpp; needs free memory to store a block = G_width/2 bytes (could be changed) local bpp8, block, i, j, line = {}, G_width/2 -- to accelerate a process, let us first create the convertion table: char (0..255) > 2 chars for j=0, 255 do i = j%16 bpp8[#bpp8+1] = string.char(255-j+i)..string.char(255-i*16) end -- now read, convert & write the fb0-content by blocks for i=1, G_height do line = inputf:read(block) for j=1, block do outputf:write(bpp8[1+string.byte(line,j)]) end end end inputf:close() outputf:close() if pack then os.execute(pack..fn) end end end