mod: screen rotation implemented by ioctl

Now you get a instance rotate :) With only one bug.
I have to restore to previous rotation state of the
native system after exists. Because the native system
does poll the new rotation state that changed by ioctl.

Currently, I don't know how to force the native system
to detect the changes.

einkfb.c

@@ -180,6 +180,29 @@ static int einkUpdate(lua_State *L) {
 	return 0;
 }
 
+/* NOTICE!!! You must close and reopen framebuffer after called this method.
+ * Otherwise, screen resolution will not be updated! */
+static int einkSetOrientation(lua_State *L) {
+#ifndef EMULATE_READER
+	FBInfo *fb = (FBInfo*) luaL_checkudata(L, 1, "einkfb");
+	int mode = luaL_optint(L, 2, 0);
+
+	if (mode < 0 || mode > 3) {
+		return luaL_error(L, "Wrong rotation mode %d given!", mode);
+	}
+
+	/* ioctl has a different definition for rotation mode. */
+	if (mode == 1) 
+		mode = 2;
+	else if (mode == 2)
+		mode = 1;
+
+	ioctl(fb->fd, FBIO_EINK_SET_DISPLAY_ORIENTATION, mode);
+#endif
+	return 0;
+}
+
+
 static const struct luaL_reg einkfb_func[] = {
 	{"open", openFrameBuffer},
 	{NULL, NULL}
@@ -189,6 +212,7 @@ static const struct luaL_reg einkfb_meth[] = {
 	{"close", closeFrameBuffer},
 	{"__gc", closeFrameBuffer},
 	{"refresh", einkUpdate},
+	{"setOrientation", einkSetOrientation},
 	{"getSize", getSize},
 	{NULL, NULL}
 };

keys.lua

@@ -196,9 +196,9 @@ function adjustKeyEvents(ev)
 
 	-- adjust five way key according to rotation mode
 	local code = ev.code
-	if Screen.cur_rotation_mode == 1 then
+	if Screen.cur_rotation_mode == 0 then
 		return code
-	elseif Screen.cur_rotation_mode == 2 then
+	elseif Screen.cur_rotation_mode == 1 then
 		if code == KEY_FW_UP then
 			return KEY_FW_RIGHT
 		elseif code == KEY_FW_RIGHT then
@@ -210,7 +210,7 @@ function adjustKeyEvents(ev)
 		else
 			return code
 		end
-	elseif Screen.cur_rotation_mode == 3 then
+	elseif Screen.cur_rotation_mode == 2 then
 		if code == KEY_FW_UP then
 			return KEY_FW_DOWN
 		elseif code == KEY_FW_RIGHT then
@@ -222,7 +222,7 @@ function adjustKeyEvents(ev)
 		else
 			return code
 		end
-	elseif Screen.cur_rotation_mode == 4 then
+	elseif Screen.cur_rotation_mode == 3 then
 		if code == KEY_FW_UP then
 			return KEY_FW_LEFT
 		elseif code == KEY_FW_RIGHT then
@@ -235,4 +235,7 @@ function adjustKeyEvents(ev)
 			return code
 		end
 	end
+	-- This should not happen.
+	print("# Unrecognizable rotation mode "..Screen.cur_rotation_mode.."!")
+	return nil
 end

reader.lua

@@ -114,6 +114,7 @@ fb = einkfb.open("/dev/fb0")
 width, height = fb:getSize()
 -- read current rotation mode
 Screen:updateRotationMode()
+origin_rotation_mode = Screen.cur_rotation_mode
 
 -- set up reader's setting: font
 reader_settings = DocSettings:open(".reader")
@@ -158,6 +159,10 @@ end
 reader_settings:savesetting("cfont", FontChooser.cfont)
 reader_settings:close()
 
+-- @TODO dirty workaround, find a way to force native system poll
+-- screen orientation and upside down mode 09.03 2012
+fb:setOrientation(origin_rotation_mode)
+
 input.closeAll()
 --os.execute('test -e /proc/keypad && echo "send '..KEY_HOME..'" > /proc/keypad ')
 if optarg["d"] ~= "emu" then

screen.lua

@@ -21,53 +21,54 @@ Codes for rotation modes:
 1 for no rotation, 
 2 for landscape with bottom on the right side of screen, etc.
 
-		  3
+		  2
    +--------------+
    | +----------+ |
    | |          | |
    | | Freedom! | |
    | |          | |  
    | |          | |  
- 4 | |          | | 2
+ 3 | |          | | 1
    | |          | |
    | |          | |
    | +----------+ |
    |              |
    |              |
    +--------------+
-		  1
+		  0
 --]]
 
 
 Screen = {
-	rotation_modes = {"Up","Right","Down","Left"},
-	cur_rotation_mode = 1,
+	cur_rotation_mode = 0,
 }
 
 -- @ orien: 1 for clockwise rotate, -1 for anti-clockwise
 function Screen:screenRotate(orien)
 	if orien == "clockwise" then
-		orien = 1
-	elseif orien == "anticlockwise" then
 		orien = -1
+	elseif orien == "anticlockwise" then
+		orien = 1
 	else
 		return
 	end
 
+	self.cur_rotation_mode = (self.cur_rotation_mode + orien) % 4
+	fb:setOrientation(self.cur_rotation_mode)
 	fb:close()
-	self.cur_rotation_mode = (self.cur_rotation_mode-1 + 1*orien)%4 + 1
-	local mode = self.rotation_modes[self.cur_rotation_mode]
-	os.execute("lipc-send-event -r 3 com.lab126.hal orientation"..mode)
+	--local mode = self.rotation_modes[self.cur_rotation_mode]
+	--self.cur_rotation_mode = (self.cur_rotation_mode-1 + 1*orien)%4 + 1
+	--os.execute("lipc-send-event -r 3 com.lab126.hal orientation"..mode)
 	fb = einkfb.open("/dev/fb0")
 end
 
 function Screen:updateRotationMode()
-	if KEY_FW_DOWN == 116 then -- in EMU mode always set to 1
-		self.cur_rotation_mode = 1
+	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) + 1
+		self.cur_rotation_mode = orie_fd:read() + (updown_fd:read() * 2)
 	end
 end
 

unireader.lua

@@ -544,10 +544,7 @@ end
 function UniReader:screenRotate(orien)
 	Screen:screenRotate(orien)
 	width, height = fb:getSize()
-
 	self:clearcache()
-	--@TODO write a sleep in util module to replace it 08.03 2012
-	os.execute("sleep 2")
 	self:goto(self.pageno)
 end
 
@@ -714,13 +711,13 @@ function UniReader:inputloop()
 				end
 			elseif ev.code == KEY_J then
 				if Keys.shiftmode then
-					self:screenRotate("anticlockwise")
+					self:screenRotate("clockwise")
 				else
 					self:setrotate( self.globalrotate + 10 )
 				end
 			elseif ev.code == KEY_K then
 				if Keys.shiftmode then
-					self:screenRotate("clockwise")
+					self:screenRotate("anticlockwise")
 				else
 					self:setrotate( self.globalrotate - 10 )
 				end