mirror of
https://github.com/koreader/koreader
synced 2024-11-18 03:25:46 +00:00
126 lines
3.0 KiB
Lua
126 lines
3.0 KiB
Lua
--[[
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Copyright (C) 2011 Hans-Werner Hilse <hilse@web.de>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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]]--
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--[[
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Codes for rotation modes:
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1 for no rotation,
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2 for landscape with bottom on the right side of screen, etc.
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2
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+--------------+
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| +----------+ |
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| | Freedom! | |
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3 | | | | 1
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| +----------+ |
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+--------------+
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0
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--]]
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Screen = {
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cur_rotation_mode = 0,
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-- these two variabls are used to help switching from framework to reader
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native_rotation_mode = nil,
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kpv_rotation_mode = nil,
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saved_bb = nil,
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fb = einkfb.open("/dev/fb0")
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}
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-- @orien: 1 for clockwise rotate, -1 for anti-clockwise
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-- Remember to reread screen resolution after this function call
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function Screen:screenRotate(orien)
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if orien == "clockwise" then
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orien = -1
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elseif orien == "anticlockwise" then
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orien = 1
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else
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return
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end
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self.cur_rotation_mode = (self.cur_rotation_mode + orien) % 4
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-- you have to reopen framebuffer after rotate
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self.fb:setOrientation(self.cur_rotation_mode)
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self.fb:close()
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self.fb = einkfb.open("/dev/fb0")
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Input.rotation = self.cur_rotation_mode
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end
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function Screen:getSize()
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local w, h = self.fb:getSize()
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return Geom:new{w = w, h = h}
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end
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function Screen:getWidth()
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local w, _ = self.fb:getSize()
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return w
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end
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function Screen:getHeight()
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local _, h = self.fb:getSize()
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return h
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end
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function Screen:updateRotationMode()
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-- in EMU mode, you will always get 0 from getOrientation()
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self.cur_rotation_mode = self.fb:getOrientation()
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end
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function Screen:setRotationMode(mode)
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self.fb:setOrientation(Screen.native_rotation_mode)
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end
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function Screen:saveCurrentBB()
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local width, height = self:getWidth(), self:getHeight()
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if not self.saved_bb then
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self.saved_bb = Blitbuffer.new(width, height)
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end
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if self.saved_bb:getWidth() ~= width then
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self.saved_bb:free()
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self.saved_bb = Blitbuffer.new(width, height)
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end
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self.saved_bb:blitFullFrom(self.fb.bb)
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end
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function Screen:restoreFromSavedBB()
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self:restoreFromBB(self.saved_bb)
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end
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function Screen:getCurrentScreenBB()
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local bb = Blitbuffer.new(self:getWidth(), self:getHeight())
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bb:blitFullFrom(self.fb.bb)
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return bb
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end
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function Screen:restoreFromBB(bb)
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if bb then
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self.fb.bb:blitFullFrom(bb)
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else
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DEBUG("Got nil bb in restoreFromSavedBB!")
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end
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end
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