From 683c7eee2c5873021510d089625ab585b4e7123e Mon Sep 17 00:00:00 2001
From: Qingping Hou <dave2008713@gmail.com>
Date: Fri, 7 Dec 2012 16:42:27 -0500
Subject: [PATCH 01/12] handle corrupted usedbbox in
 Document:getUsedBBoxDimensions()

---
 frontend/document/document.lua | 24 ++++++++++++++++--------
 1 file changed, 16 insertions(+), 8 deletions(-)

diff --git a/frontend/document/document.lua b/frontend/document/document.lua
index cd73f22ef..fca96135b 100644
--- a/frontend/document/document.lua
+++ b/frontend/document/document.lua
@@ -124,16 +124,24 @@ function Document:getPageDimensions(pageno, zoom, rotation)
 	return native_dimen
 end
 
+--[[
+This method returns pagesize if bbox is corrupted
+--]]
 function Document:getUsedBBoxDimensions(pageno, zoom, rotation)
 	ubbox = self:getUsedBBox(pageno)
-	ubbox_dimen = Geom:new{
-		x = ubbox.x0,
-		y = ubbox.y0,
-		w = ubbox.x1 - ubbox.x0,
-		h = ubbox.y1 - ubbox.y0,
-	}
-	if zoom ~= 1 then
-		ubbox_dimen:transformByScale(zoom)
+	if ubbox.x0 < 0 or ubbox.y0 < 0 or ubbox.x1 < 0 or ubbox.y1 < 0 then
+		-- if document's bbox info is corrupted, we use the page size
+		ubbox_dimen = self:getPageDimensions(pageno, zoom, rotation)
+	else
+		ubbox_dimen = Geom:new{
+			x = ubbox.x0,
+			y = ubbox.y0,
+			w = ubbox.x1 - ubbox.x0,
+			h = ubbox.y1 - ubbox.y0,
+		}
+		if zoom ~= 1 then
+			ubbox_dimen:transformByScale(zoom)
+		end
 	end
 	return ubbox_dimen
 end

From e98a89f8d57bf290330e23511d5d8c0cfde56294 Mon Sep 17 00:00:00 2001
From: Qingping Hou <dave2008713@gmail.com>
Date: Sat, 8 Dec 2012 01:05:10 -0500
Subject: [PATCH 02/12] demo for dimming on page overlap

---
 frontend/ui/reader/readerpaging.lua  | 68 +++++++++++++++++++++++++---
 frontend/ui/reader/readerrolling.lua | 47 +++++++++++--------
 frontend/ui/reader/readerview.lua    | 19 +++++++-
 3 files changed, 105 insertions(+), 29 deletions(-)

diff --git a/frontend/ui/reader/readerpaging.lua b/frontend/ui/reader/readerpaging.lua
index a75279bc6..f06739123 100644
--- a/frontend/ui/reader/readerpaging.lua
+++ b/frontend/ui/reader/readerpaging.lua
@@ -3,6 +3,8 @@ ReaderPaging = InputContainer:new{
 	number_of_pages = 0,
 	visible_area = nil,
 	page_area = nil,
+	show_overlap_enable = true,
+	overlap = 20,
 }
 
 function ReaderPaging:init()
@@ -67,6 +69,10 @@ end
 
 function ReaderPaging:onReadSettings(config)
 	self:gotoPage(config:readSetting("last_page") or 1)
+	local soe = config:readSetting("show_overlap_enable")
+	if not soe then
+		self.show_overlap_enable = soe
+	end
 end
 
 function ReaderPaging:onCloseDocument()
@@ -112,7 +118,7 @@ end
 
 function ReaderPaging:onViewRecalculate(visible_area, page_area)
 	-- we need to remember areas to handle page turn event
-	self.visible_area = visible_area
+	self.visible_area = visible_area:copy()
 	self.page_area = page_area
 end
 
@@ -144,28 +150,76 @@ function ReaderPaging:onGotoPageRel(diff)
 			x_pan_off = self.visible_area.w * diff
 		end
 	end
-
 	-- adjust offset to help with page turn decision
+	-- we dont take overlap into account here yet, otherwise new_va will
+	-- always intersect with page_area
 	x_pan_off = math.roundAwayFromZero(x_pan_off)
 	y_pan_off = math.roundAwayFromZero(y_pan_off)
 	new_va.x = math.roundAwayFromZero(self.visible_area.x+x_pan_off)
 	new_va.y = math.roundAwayFromZero(self.visible_area.y+y_pan_off)
 
-	if (new_va:notIntersectWith(self.page_area)) then
+	if new_va:notIntersectWith(self.page_area) then
+		-- view area out of page area, do a page turn
 		self:gotoPage(self.current_page + diff)
 		-- if we are going back to previous page, reset
-		-- view to bottom of previous page
+		-- view area to bottom of previous page
 		if x_pan_off < 0 then
 			self.view:PanningUpdate(self.page_area.w, 0)
 		elseif y_pan_off < 0 then
 			self.view:PanningUpdate(0, self.page_area.h)
 		end
+		-- reset dim_area
+		--self.view.dim_area.h = 0
+		--self.view.dim_area.w = 0
+		--
 	else
+		-- not end of page yet, goto next view
+		-- adjust panning step according to overlap
+		if self.show_overlap_enable then
+			if x_pan_off > self.overlap then
+				-- moving to next view, move view
+				x_pan_off = x_pan_off - self.overlap
+			elseif x_pan_off < -self.overlap then
+				x_pan_off = x_pan_off + self.overlap
+			end
+			if y_pan_off > self.overlap then
+				y_pan_off = y_pan_off - self.overlap
+			elseif y_pan_off < -self.overlap then
+				y_pan_off = y_pan_off + self.overlap
+			end
+			-- we have to calculate again to count into overlap
+			new_va.x = math.roundAwayFromZero(self.visible_area.x+x_pan_off)
+			new_va.y = math.roundAwayFromZero(self.visible_area.y+y_pan_off)
+		end
 		-- fit new view area into page area
 		new_va:offsetWithin(self.page_area, 0, 0)
-		self.view:PanningUpdate(
-			new_va.x - self.visible_area.x,
-			new_va.y - self.visible_area.y)
+		-- calculate panning offsets
+		local panned_x = new_va.x - self.visible_area.x
+		local panned_y = new_va.y - self.visible_area.y
+		-- adjust for crazy float point overflow...
+		if math.abs(panned_x) < 1 then
+			panned_x = 0
+		end
+		if math.abs(panned_y) < 1 then
+			panned_y = 0
+		end
+		-- singal panning update
+		self.view:PanningUpdate(panned_x, panned_y)
+		-- update dime area in ReaderView
+		if self.show_overlap_enable then
+			self.view.dim_area.h = new_va.h - math.abs(panned_y)
+			self.view.dim_area.w = new_va.w - math.abs(panned_x)
+			if panned_y < 0 then
+				self.view.dim_area.y = new_va.y - panned_y
+			else
+				self.view.dim_area.y = 0
+			end
+			if panned_x < 0 then
+				self.view.dim_area.x = new_va.x - panned_x
+			else
+				self.view.dim_area.x = 0
+			end
+		end
 		-- update self.visible_area
 		self.visible_area = new_va
 	end
diff --git a/frontend/ui/reader/readerrolling.lua b/frontend/ui/reader/readerrolling.lua
index 8f6f63a2b..942921843 100644
--- a/frontend/ui/reader/readerrolling.lua
+++ b/frontend/ui/reader/readerrolling.lua
@@ -1,29 +1,12 @@
 require "ui/reader/readerpanning"
 
 ReaderRolling = InputContainer:new{
-	key_events = {
-		GotoNextView = { {Input.group.PgFwd}, doc = "go to next view", event = "GotoViewRel", args = 1 },
-		GotoPrevView = { {Input.group.PgBack}, doc = "go to previous view", event = "GotoViewRel", args = -1 },
-
-		MoveUp = { {"Up"}, doc = "move view up", event = "Panning", args = {0, -1} },
-		MoveDown = { {"Down"}, doc = "move view down", event = "Panning", args = {0,  1} },
-
-		GotoFirst = { {"1"}, doc = "go to start", event = "GotoPercent", args = 0},
-		Goto11 = { {"2"}, doc = "go to 11%", event = "GotoPercent", args = 11},
-		Goto22 = { {"3"}, doc = "go to 22%", event = "GotoPercent", args = 22},
-		Goto33 = { {"4"}, doc = "go to 33%", event = "GotoPercent", args = 33},
-		Goto44 = { {"5"}, doc = "go to 44%", event = "GotoPercent", args = 44},
-		Goto55 = { {"6"}, doc = "go to 55%", event = "GotoPercent", args = 55},
-		Goto66 = { {"7"}, doc = "go to 66%", event = "GotoPercent", args = 66},
-		Goto77 = { {"8"}, doc = "go to 77%", event = "GotoPercent", args = 77},
-		Goto88 = { {"9"}, doc = "go to 88%", event = "GotoPercent", args = 88},
-		GotoLast = { {"0"}, doc = "go to end", event = "GotoPercent", args = 100},
-	},
-
 	old_doc_height = nil,
 	current_pos = 0,
 	doc_height = nil,
 	panning_steps = ReaderPanning.panning_steps,
+	show_overlap_enable = true,
+	overlap = 20,
 }
 
 function ReaderRolling:init()
@@ -103,6 +86,10 @@ end
 
 function ReaderRolling:onReadSettings(config)
 	self:gotoPercent(config:readSetting("last_percent") or 0)
+	local soe = config:readSetting("show_overlap_enable")
+	if not soe then
+		self.show_overlap_enable = soe
+	end
 end
 
 function ReaderRolling:onCloseDocument()
@@ -132,7 +119,15 @@ end
 
 function ReaderRolling:onGotoViewRel(diff)
 	DEBUG("goto relative screen:", diff)
-	self:gotoPos(self.current_pos + diff * self.ui.dimen.h)
+	local pan_diff = diff * self.ui.dimen.h
+	if self.show_overlap_enable then
+		if pan_diff > self.overlap then
+			pan_diff = pan_diff - self.overlap
+		elseif pan_diff < -self.overlap then
+			pan_diff = pan_diff + self.overlap
+		end
+	end
+	self:gotoPos(self.current_pos + pan_diff)
 	return true
 end
 
@@ -167,6 +162,18 @@ function ReaderRolling:gotoPos(new_pos)
 	if new_pos == self.current_pos then return end
 	if new_pos < 0 then new_pos = 0 end
 	if new_pos > self.doc_height then new_pos = self.doc_height end
+	-- adjust dim_area according to new_pos
+	if self.show_overlap_enable then
+		local panned_step = new_pos - self.current_pos
+		self.view.dim_area.x = 0
+		self.view.dim_area.h = self.ui.dimen.h - math.abs(panned_step)
+		self.view.dim_area.w = self.ui.dimen.w
+		if panned_step < 0 then
+			self.view.dim_area.y = self.ui.dimen.h - self.view.dim_area.h
+		elseif panned_step > 0 then
+			self.view.dim_area.y = 0
+		end
+	end
 	self.ui:handleEvent(Event:new("PosUpdate", new_pos))
 end
 
diff --git a/frontend/ui/reader/readerview.lua b/frontend/ui/reader/readerview.lua
index e0662c471..b977dc555 100644
--- a/frontend/ui/reader/readerview.lua
+++ b/frontend/ui/reader/readerview.lua
@@ -17,6 +17,8 @@ ReaderView = WidgetContainer:new{
 	visible_area = Geom:new{x = 0, y = 0},
 	-- dimen for current viewing page
 	page_area = Geom:new{},
+	-- dimen for area to dim
+	dim_area = Geom:new{w = 0, h = 0},
 }
 
 function ReaderView:paintTo(bb, x, y)
@@ -54,8 +56,18 @@ function ReaderView:paintTo(bb, x, y)
 			self.visible_area,
 			self.state.pos)
 	end
+	-- dim last read area
+	if self.dim_area.w ~= 0 and self.dim_area.h ~= 0 then
+		bb:dimRect(
+			self.dim_area.x, self.dim_area.y,
+			self.dim_area.w, self.dim_area.h
+		)
+	end
 end
 
+--[[
+This method is supposed to be only used by ReaderPaging
+--]]
 function ReaderView:recalculate()
 	local page_size = nil
 	if self.ui.document.info.has_pages then
@@ -77,11 +89,14 @@ function ReaderView:recalculate()
 		self.visible_area:setSizeTo(self.dimen)
 		-- and recalculate it according to page size
 		self.visible_area:offsetWithin(self.page_area, 0, 0)
+		-- clear dim area
+		self.dim_area.w = 0
+		self.dim_area.h = 0
+		self.ui:handleEvent(
+			Event:new("ViewRecalculate", self.visible_area, self.page_area))
 	else
 		self.visible_area:setSizeTo(self.dimen)
 	end
-	self.ui:handleEvent(
-		Event:new("ViewRecalculate", self.visible_area, self.page_area))
 	-- flag a repaint so self:paintTo will be called
 	UIManager:setDirty(self.dialog)
 end

From cc38d9e6fcd8b51d16d9d39e6bdcb5cae9eab2db Mon Sep 17 00:00:00 2001
From: Qingping Hou <dave2008713@gmail.com>
Date: Sat, 8 Dec 2012 01:06:47 -0500
Subject: [PATCH 03/12] add KT support

---
 frontend/ui/device.lua     | 11 +++++++++--
 frontend/ui/inputevent.lua |  6 +++++-
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/frontend/ui/device.lua b/frontend/ui/device.lua
index aaa3b1525..915b60447 100644
--- a/frontend/ui/device.lua
+++ b/frontend/ui/device.lua
@@ -15,9 +15,16 @@ function Device:getModel()
 		end
 	end
 	if cpu_mod == "MX50" then
-		local f = lfs.attributes("/sys/devices/system/fl_tps6116x/fl_tps6116x0/fl_intensity")
-		if f then
+		-- for KPW
+		local pw_test_fd = lfs.attributes("/sys/devices/system/fl_tps6116x/fl_tps6116x0/fl_intensity")
+		-- for KT
+		local kt_test_fd = lfs.attributes("/sys/devices/platform/whitney-button")
+		-- another special file for KT is Neonode zForce touchscreen:
+		-- /sys/devices/platform/zforce.0/
+		if pw_test_fd then
 			return "KindlePaperWhite"
+		elseif kt_test_fd then
+			return "KindleTouch"
 		else
 			return "Kindle4"
 		end
diff --git a/frontend/ui/inputevent.lua b/frontend/ui/inputevent.lua
index 89a496f29..efd2a58b8 100644
--- a/frontend/ui/inputevent.lua
+++ b/frontend/ui/inputevent.lua
@@ -239,13 +239,17 @@ function Input:init()
 	else
 		input.open("fake_events")
 		local dev_mod = Device:getModel()
-
+		-- open event0 for all models
 		input.open("/dev/input/event0")
 		if dev_mod ~= "KindlePaperWhite" then
 			-- we don't have event1 in KindlePaperWhite
 			input.open("/dev/input/event1")
 		elseif dev_mod == "KindlePaperWhite" then
 			print("Auto-detected Kindle PaperWhite")
+		elseif dev_mod == "KindleTouch" then
+			input.open("/dev/input/event2")
+			input.open("/dev/input/event3")
+			print("Auto-detected Kindle Touch")
 		elseif dev_mod == "Kindle4" then
 			print("Auto-detected Kindle 4")
 			self:adjustKindle4EventMap()

From bf86cf7a93b418efd577837ab8180c6ec605595e Mon Sep 17 00:00:00 2001
From: eureka <@mobileread.com>
Date: Mon, 10 Dec 2012 18:52:22 -0500
Subject: [PATCH 04/12] KT input device patch from eureka

* add KT detection
* remove unnacessary input device for KT
---
 frontend/ui/device.lua     |  2 +-
 frontend/ui/inputevent.lua | 18 +++++++++++-------
 2 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/frontend/ui/device.lua b/frontend/ui/device.lua
index 915b60447..454453a9a 100644
--- a/frontend/ui/device.lua
+++ b/frontend/ui/device.lua
@@ -67,7 +67,7 @@ end
 
 function Device:isTouchDevice()
 	local model = self:getModel()
-	return (model == "Kindle4") or (model == "KindlePaperWhite") or util.isEmulated()
+	return (model == "Kindle4") or (model == "KindlePaperWhite") or (model == "KindleTouch") or util.isEmulated()
 end
 
 function Device:intoScreenSaver()
diff --git a/frontend/ui/inputevent.lua b/frontend/ui/inputevent.lua
index efd2a58b8..a7b52f590 100644
--- a/frontend/ui/inputevent.lua
+++ b/frontend/ui/inputevent.lua
@@ -239,16 +239,20 @@ function Input:init()
 	else
 		input.open("fake_events")
 		local dev_mod = Device:getModel()
-		-- open event0 for all models
-		input.open("/dev/input/event0")
-		if dev_mod ~= "KindlePaperWhite" then
-			-- we don't have event1 in KindlePaperWhite
+		if dev_mod ~= "KindleTouch" then
+			-- event0 in KindleTouch is "WM8962 Beep Generator" (useless)
+			input.open("/dev/input/event0")
+		end
+		if dev_mod ~= "KindleTouch" and dev_mod ~= "KindlePaperWhite" then
+			-- event1 in KindleTouch is "imx-yoshi Headset" (useless)
+			-- and we don't have event1 in KindlePaperWhite
 			input.open("/dev/input/event1")
-		elseif dev_mod == "KindlePaperWhite" then
+		end
+		if dev_mod == "KindlePaperWhite" then
 			print("Auto-detected Kindle PaperWhite")
 		elseif dev_mod == "KindleTouch" then
-			input.open("/dev/input/event2")
-			input.open("/dev/input/event3")
+			input.open("/dev/input/event2") -- Home button
+			input.open("/dev/input/event3") -- touchscreen
 			print("Auto-detected Kindle Touch")
 		elseif dev_mod == "Kindle4" then
 			print("Auto-detected Kindle 4")

From 1b7357fc0f7798035d6e27ff395d7ceaa5e704a9 Mon Sep 17 00:00:00 2001
From: Qingping Hou <dave2008713@gmail.com>
Date: Mon, 10 Dec 2012 19:01:32 -0500
Subject: [PATCH 05/12] add Device:hasKeyboard to help initialize UI components

So that kindle4 won't have all the gesture event registered.
---
 frontend/ui/device.lua | 14 ++++++++++++--
 reader.lua             |  5 +----
 2 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/frontend/ui/device.lua b/frontend/ui/device.lua
index 454453a9a..1ff787c5f 100644
--- a/frontend/ui/device.lua
+++ b/frontend/ui/device.lua
@@ -1,6 +1,7 @@
 Device = {
 	screen_saver_mode = false,
 	charging_mode = false,
+	model = nil,
 }
 
 function Device:getModel()
@@ -65,9 +66,18 @@ function Device:isKindle2()
 	end
 end
 
+function Device:hasNoKeyboard()
+	if not self.model then
+		self.model = self:getModel()
+	end
+	return self:isTouchDevice() or (self.model == "Kindle4")
+end
+
 function Device:isTouchDevice()
-	local model = self:getModel()
-	return (model == "Kindle4") or (model == "KindlePaperWhite") or (model == "KindleTouch") or util.isEmulated()
+	if not self.model then
+		self.model = self:getModel()
+	end
+	return (self.model == "KindlePaperWhite") or (self.model == "KindleTouch") or util.isEmulated()
 end
 
 function Device:intoScreenSaver()
diff --git a/reader.lua b/reader.lua
index 51932222c..12afe36ea 100755
--- a/reader.lua
+++ b/reader.lua
@@ -62,9 +62,6 @@ end
 
 -- option parsing:
 longopts = {
-	password = "p",
-	goto = "g",
-	gamma = "G",
 	debug = "d",
 	help = "h",
 }
@@ -97,7 +94,7 @@ else
 	DEBUG = function() end
 end
 
-if Device.isKindle4() or Device:isTouchDevice() then
+if Device:hasNoKeyboard() then
 	-- remove menu item shortcut for K4
 	Menu.is_enable_shortcut = false
 end

From 334f680598977c4704fd60299b77ecc44cd83564 Mon Sep 17 00:00:00 2001
From: Qingping Hou <dave2008713@gmail.com>
Date: Mon, 10 Dec 2012 19:54:44 -0500
Subject: [PATCH 06/12] use proper eink update function for KT

---
 einkfb.c | 269 ++++++++++++++++++++++++++++---------------------------
 1 file changed, 137 insertions(+), 132 deletions(-)

diff --git a/einkfb.c b/einkfb.c
index cdbc61658..d7a594288 100644
--- a/einkfb.c
+++ b/einkfb.c
@@ -19,13 +19,130 @@
 #include <sys/ioctl.h>
 #include <sys/mman.h>
 #include <fcntl.h>
-//#include <stdio.h>
+#include <stdlib.h>
 
 #include "einkfb.h"
 
 #ifdef EMULATE_READER
-	int emu_w = EMULATE_READER_W;
-	int emu_h = EMULATE_READER_H;
+int emu_w = EMULATE_READER_W;
+int emu_h = EMULATE_READER_H;
+#else
+static void (*einkUpdateFunc)(FBInfo *fb, lua_State *L) = NULL;
+
+inline void fbInvert4BppTo8Bpp(FBInfo *fb) {
+	int i = 0, j = 0, h = 0, w = 0, pitch = 0, fb_pitch = 0;
+	uint8_t *shadow_buf = NULL, *fb_buf = NULL;
+
+	shadow_buf = fb->buf->data;
+	fb_buf = fb->real_buf->data;
+	h = fb->buf->h;
+	w = fb->buf->w;
+	pitch = fb->buf->pitch;
+	fb_pitch = fb->real_buf->pitch;
+
+	/* copy bitmap from 4bpp shadow blitbuffer to framebuffer */
+	for (i = (h-1); i > 0; i--) {
+		for (j = (w-1)/2; j > 0; j--) {
+			fb_buf[i*fb_pitch + j*2] = shadow_buf[i*pitch + j];
+			fb_buf[i*fb_pitch + j*2] &= 0xF0;
+			fb_buf[i*fb_pitch + j*2] |= shadow_buf[i*pitch + j]>>4 & 0x0F;
+
+			fb_buf[i*fb_pitch + j*2 + 1] = shadow_buf[i*pitch + j];
+			fb_buf[i*fb_pitch + j*2 + 1] &= 0x0F;
+			fb_buf[i*fb_pitch + j*2 + 1] |= shadow_buf[i*pitch + j]<<4 & 0xF0;
+		}
+	}
+}
+
+inline void fb4BppTo8Bpp(FBInfo *fb) {
+	int i = 0, j = 0, h = 0, w = 0, pitch = 0, fb_pitch = 0;
+	uint8_t *shadow_buf = NULL, *fb_buf = NULL;
+
+	shadow_buf = fb->buf->data;
+	fb_buf = fb->real_buf->data;
+	/* h is 1024 for PaperWhite */
+	h = fb->buf->h;
+	/* w is 758 for PaperWhite */
+	w = fb->buf->w;
+	/* pitch is 384 for shadow buffer */
+	pitch = fb->buf->pitch;
+	/* pitch is 768 for PaperWhite */
+	fb_pitch = fb->real_buf->pitch;
+
+	/* copy bitmap from 4bpp shadow blitbuffer to framebuffer */
+	for (i = (h-1); i > 0; i--) {
+		for (j = (w-1)/2; j > 0; j--) {
+			fb_buf[i*fb_pitch + j*2] = shadow_buf[i*pitch + j];
+			fb_buf[i*fb_pitch + j*2] &= 0xF0;
+			fb_buf[i*fb_pitch + j*2] |= shadow_buf[i*pitch + j]>>4 & 0x0F;
+			fb_buf[i*fb_pitch + j*2] = ~fb_buf[i*fb_pitch + j*2];
+
+			fb_buf[i*fb_pitch + j*2 + 1] = shadow_buf[i*pitch + j];
+			fb_buf[i*fb_pitch + j*2 + 1] &= 0x0F;
+			fb_buf[i*fb_pitch + j*2 + 1] |= shadow_buf[i*pitch + j]<<4 & 0xF0;
+			fb_buf[i*fb_pitch + j*2 + 1] = ~fb_buf[i*fb_pitch + j*2 + 1];
+		}
+	}
+}
+
+inline void fillUpdateAreaT(update_area_t *myarea, FBInfo *fb, lua_State *L) {
+	int fxtype = luaL_optint(L, 2, 0);
+
+	myarea->x1 = luaL_optint(L, 3, 0);
+	myarea->y1 = luaL_optint(L, 4, 0);
+	myarea->x2 = myarea->x1 + luaL_optint(L, 5, fb->vinfo.xres);
+	myarea->y2 = myarea->y1 + luaL_optint(L, 6, fb->vinfo.yres);
+	myarea->buffer = NULL;
+	myarea->which_fx = fxtype ? fx_update_partial : fx_update_full;
+}
+
+inline void fillMxcfbUpdateData51(mxcfb_update_data51 *myarea, FBInfo *fb, lua_State *L) {
+	myarea->update_region.top = luaL_optint(L, 3, 0);
+	myarea->update_region.left = luaL_optint(L, 4, 0);
+	myarea->update_region.width = luaL_optint(L, 5, fb->vinfo.xres);
+	myarea->update_region.height = luaL_optint(L, 6, fb->vinfo.yres);
+	myarea->waveform_mode = 257;
+	myarea->update_mode = 0;
+	myarea->update_marker = 1;
+	myarea->hist_bw_waveform_mode = 0;
+	myarea->hist_gray_waveform_mode = 0;
+	myarea->temp = 0x1001;
+	myarea->flags = 0;
+	myarea->alt_buffer_data.virt_addr = NULL;
+	myarea->alt_buffer_data.phys_addr = NULL;
+	myarea->alt_buffer_data.width = 0;
+	myarea->alt_buffer_data.height = 0;
+	myarea->alt_buffer_data.alt_update_region.top = 0;
+	myarea->alt_buffer_data.alt_update_region.left = 0;
+	myarea->alt_buffer_data.alt_update_region.width = 0;
+	myarea->alt_buffer_data.alt_update_region.height = 0;
+}
+
+void kindle3einkUpdate(FBInfo *fb, lua_State *L) {
+	update_area_t myarea;
+
+	fillUpdateAreaT(&myarea, fb, L);
+
+	ioctl(fb->fd, FBIO_EINK_UPDATE_DISPLAY_AREA, &myarea);
+}
+
+void kindle4einkUpdate(FBInfo *fb, lua_State *L) {
+	update_area_t myarea;
+
+	fbInvert4BppTo8Bpp(fb);
+	fillUpdateAreaT(&myarea, fb, L);
+
+	ioctl(fb->fd, FBIO_EINK_UPDATE_DISPLAY_AREA, &myarea);
+}
+
+void kindle51einkUpdate(FBInfo *fb, lua_State *L) {
+	mxcfb_update_data51 myarea;
+
+	fb4BppTo8Bpp(fb);
+	fillMxcfbUpdateData51(&myarea, fb, L);
+
+	ioctl(fb->fd, 0x4048462e, &myarea);
+}
 #endif	
 
 static int openFrameBuffer(lua_State *L) {
@@ -65,6 +182,22 @@ static int openFrameBuffer(lua_State *L) {
 				fb->finfo.type);
 	}
 
+	if (strncmp(fb->finfo.id, "mxc_epdc_fb", 11) == 0) {
+		/* Kindle PaperWhite and KT with 5.1 or later firmware */
+		einkUpdateFunc = &kindle51einkUpdate;
+	} else if (strncmp(fb->finfo.id, "eink_fb", 7) == 0) {
+		if (fb->vinfo.bits_per_pixel == 8) {
+			/* kindle4 */
+			einkUpdateFunc = &kindle4einkUpdate;
+		} else {
+			/* kindle2, 3, DXG */
+			einkUpdateFunc = &kindle3einkUpdate;
+		}
+	} else {
+		return luaL_error(L, "eink model %s not supported",
+				fb->finfo.id);
+	}
+
 	if (ioctl(fb->fd, FBIOGET_VSCREENINFO, &fb->vinfo)) {
 		return luaL_error(L, "cannot get variable screen info");
 	}
@@ -167,139 +300,11 @@ static int closeFrameBuffer(lua_State *L) {
 	return 0;
 }
 
-#ifndef EMULATE_READER
-inline void fbInvert4BppTo8Bpp(FBInfo *fb) {
-	int i = 0, j = 0, h = 0, w = 0, pitch = 0, fb_pitch = 0;
-	uint8_t *shadow_buf = NULL, *fb_buf = NULL;
-
-	shadow_buf = fb->buf->data;
-	fb_buf = fb->real_buf->data;
-	h = fb->buf->h;
-	w = fb->buf->w;
-	pitch = fb->buf->pitch;
-	fb_pitch = fb->real_buf->pitch;
-
-	/* copy bitmap from 4bpp shadow blitbuffer to framebuffer */
-	for (i = (h-1); i > 0; i--) {
-		for (j = (w-1)/2; j > 0; j--) {
-			fb_buf[i*fb_pitch + j*2] = shadow_buf[i*pitch + j];
-			fb_buf[i*fb_pitch + j*2] &= 0xF0;
-			fb_buf[i*fb_pitch + j*2] |= shadow_buf[i*pitch + j]>>4 & 0x0F;
-
-			fb_buf[i*fb_pitch + j*2 + 1] = shadow_buf[i*pitch + j];
-			fb_buf[i*fb_pitch + j*2 + 1] &= 0x0F;
-			fb_buf[i*fb_pitch + j*2 + 1] |= shadow_buf[i*pitch + j]<<4 & 0xF0;
-		}
-	}
-}
-
-inline void fb4BppTo8Bpp(FBInfo *fb) {
-	int i = 0, j = 0, h = 0, w = 0, pitch = 0, fb_pitch = 0;
-	uint8_t *shadow_buf = NULL, *fb_buf = NULL;
-
-	shadow_buf = fb->buf->data;
-	fb_buf = fb->real_buf->data;
-	/* h is 1024 for PaperWhite */
-	h = fb->buf->h;
-	/* w is 758 for PaperWhite */
-	w = fb->buf->w;
-	/* pitch is 384 for shadow buffer */
-	pitch = fb->buf->pitch;
-	/* pitch is 768 for PaperWhite */
-	fb_pitch = fb->real_buf->pitch;
-
-	/* copy bitmap from 4bpp shadow blitbuffer to framebuffer */
-	for (i = (h-1); i > 0; i--) {
-		for (j = (w-1)/2; j > 0; j--) {
-			fb_buf[i*fb_pitch + j*2] = shadow_buf[i*pitch + j];
-			fb_buf[i*fb_pitch + j*2] &= 0xF0;
-			fb_buf[i*fb_pitch + j*2] |= shadow_buf[i*pitch + j]>>4 & 0x0F;
-			fb_buf[i*fb_pitch + j*2] = ~fb_buf[i*fb_pitch + j*2];
-
-			fb_buf[i*fb_pitch + j*2 + 1] = shadow_buf[i*pitch + j];
-			fb_buf[i*fb_pitch + j*2 + 1] &= 0x0F;
-			fb_buf[i*fb_pitch + j*2 + 1] |= shadow_buf[i*pitch + j]<<4 & 0xF0;
-			fb_buf[i*fb_pitch + j*2 + 1] = ~fb_buf[i*fb_pitch + j*2 + 1];
-		}
-	}
-}
-
-inline void fillUpdateAreaT(update_area_t *myarea, FBInfo *fb, lua_State *L) {
-	int fxtype = luaL_optint(L, 2, 0);
-
-	myarea->x1 = luaL_optint(L, 3, 0);
-	myarea->y1 = luaL_optint(L, 4, 0);
-	myarea->x2 = myarea->x1 + luaL_optint(L, 5, fb->vinfo.xres);
-	myarea->y2 = myarea->y1 + luaL_optint(L, 6, fb->vinfo.yres);
-	myarea->buffer = NULL;
-	myarea->which_fx = fxtype ? fx_update_partial : fx_update_full;
-}
-
-inline void fillMxcfbUpdateData51(mxcfb_update_data51 *myarea, FBInfo *fb, lua_State *L) {
-	myarea->update_region.top = luaL_optint(L, 3, 0);
-	myarea->update_region.left = luaL_optint(L, 4, 0);
-	myarea->update_region.width = luaL_optint(L, 5, fb->vinfo.xres);
-	myarea->update_region.height = luaL_optint(L, 6, fb->vinfo.yres);
-	myarea->waveform_mode = 257;
-	myarea->update_mode = 0;
-	myarea->update_marker = 1;
-	myarea->hist_bw_waveform_mode = 0;
-	myarea->hist_gray_waveform_mode = 0;
-	myarea->temp = 0x1001;
-	myarea->flags = 0;
-	myarea->alt_buffer_data.virt_addr = NULL;
-	myarea->alt_buffer_data.phys_addr = NULL;
-	myarea->alt_buffer_data.width = 0;
-	myarea->alt_buffer_data.height = 0;
-	myarea->alt_buffer_data.alt_update_region.top = 0;
-	myarea->alt_buffer_data.alt_update_region.left = 0;
-	myarea->alt_buffer_data.alt_update_region.width = 0;
-	myarea->alt_buffer_data.alt_update_region.height = 0;
-}
-
-inline void Kindle3einkUpdate(FBInfo *fb, lua_State *L) {
-	update_area_t myarea;
-
-	fillUpdateAreaT(&myarea, fb, L);
-
-	ioctl(fb->fd, FBIO_EINK_UPDATE_DISPLAY_AREA, &myarea);
-}
-
-inline void kindle4einkUpdate(FBInfo *fb, lua_State *L) {
-	update_area_t myarea;
-
-	fbInvert4BppTo8Bpp(fb);
-	fillUpdateAreaT(&myarea, fb, L);
-
-	ioctl(fb->fd, FBIO_EINK_UPDATE_DISPLAY_AREA, &myarea);
-}
-
-inline void kindlePWeinkUpdate(FBInfo *fb, lua_State *L) {
-	mxcfb_update_data51 myarea;
-
-	fb4BppTo8Bpp(fb);
-	fillMxcfbUpdateData51(&myarea, fb, L);
-
-	ioctl(fb->fd, 0x4048462e, &myarea);
-}
-#endif
-
 static int einkUpdate(lua_State *L) {
 	FBInfo *fb = (FBInfo*) luaL_checkudata(L, 1, "einkfb");
 	// for Kindle e-ink display
 #ifndef EMULATE_READER
-	if (fb->vinfo.bits_per_pixel == 8) {
-		if (fb->buf->h == 1024) {
-			/* Kindle PaperWhite */
-			kindlePWeinkUpdate(fb, L);
-		} else {
-			/* kindle4 */
-			kindle4einkUpdate(fb, L);
-		}
-	} else {
-		/* kindle2, 3, DXG */
-		Kindle3einkUpdate(fb, L);
-	}
+	einkUpdateFunc(fb, L);
 #else
 	int fxtype = luaL_optint(L, 2, 0);
 	// for now, we only do fullscreen blits in emulation mode

From 15e0af285727e8bc55b3bb7e800d8267ee1417f7 Mon Sep 17 00:00:00 2001
From: eureka <@mobileread.com>
Date: Mon, 10 Dec 2012 20:06:27 -0500
Subject: [PATCH 07/12] update mxcfb_alt_buffer_data struct, added
 MXCFB_SEND_UPDATE51

* mxcfb_alt_buffer_data is modified according to amazon's source
* use MXCFB_SEND_UPDATE51 instead of magic raw number for update
---
 einkfb.c        |  4 ++--
 include/mxcfb.h | 21 ++++++++++++++-------
 2 files changed, 16 insertions(+), 9 deletions(-)

diff --git a/einkfb.c b/einkfb.c
index d7a594288..f4a10a8bb 100644
--- a/einkfb.c
+++ b/einkfb.c
@@ -108,7 +108,7 @@ inline void fillMxcfbUpdateData51(mxcfb_update_data51 *myarea, FBInfo *fb, lua_S
 	myarea->hist_gray_waveform_mode = 0;
 	myarea->temp = 0x1001;
 	myarea->flags = 0;
-	myarea->alt_buffer_data.virt_addr = NULL;
+	/*myarea->alt_buffer_data.virt_addr = NULL;*/
 	myarea->alt_buffer_data.phys_addr = NULL;
 	myarea->alt_buffer_data.width = 0;
 	myarea->alt_buffer_data.height = 0;
@@ -141,7 +141,7 @@ void kindle51einkUpdate(FBInfo *fb, lua_State *L) {
 	fb4BppTo8Bpp(fb);
 	fillMxcfbUpdateData51(&myarea, fb, L);
 
-	ioctl(fb->fd, 0x4048462e, &myarea);
+	ioctl(fb->fd, MXCFB_SEND_UPDATE51, &myarea);
 }
 #endif	
 
diff --git a/include/mxcfb.h b/include/mxcfb.h
index e4e885bf8..4e313299b 100644
--- a/include/mxcfb.h
+++ b/include/mxcfb.h
@@ -1,12 +1,15 @@
 /*
  * Copyright 2004-2011 Freescale Semiconductor, Inc. All Rights Reserved.
  *
- * Modified by houqp, added mxcfb_update_data51 struct from GeekMaster's video
- * player, refer to:
- * http://www.mobileread.com/forums/showthread.php?t=177455&page=10
- */
-
-/*
+ * - Modified by houqp, added mxcfb_update_data51 struct from GeekMaster's
+ *   video player, refer to:
+ *   http://www.mobileread.com/forums/showthread.php?t=177455&page=10
+ *
+ * - Modified mxcfb_alt_buffer_data struct according to include/linux/mxcfb.h
+ *   from Kindle 5.3.0 firmware. Thanks to eureka@mobileread.
+ *   http://www.mobileread.com/forums/showpost.php?p=2337118&postcount=818
+ *
+ *
  * The code contained herein is licensed under the GNU Lesser General
  * Public License.  You may obtain a copy of the GNU Lesser General
  * Public License Version 2.1 or later at the following locations:
@@ -96,7 +99,8 @@ struct mxcfb_rect {
 #define FB_TEMP_AUTO_UPDATE_DISABLE     -1
 
 struct mxcfb_alt_buffer_data {
-	void *virt_addr;
+	/* virt_addr is not included in amazon's source */
+	/* void *virt_addr; */
 	__u32 phys_addr;
 	__u32 width;	/* width of entire buffer */
 	__u32 height;	/* height of entire buffer */
@@ -168,6 +172,9 @@ struct mxcfb_waveform_modes {
 #define MXCFB_SET_TEMP_AUTO_UPDATE_PERIOD     _IOR('F', 0x36, int32_t)
 #define MXCFB_SET_MERGE_ON_WAVEFORM_MISMATCH	_IOW('F', 0x37, int32_t)
 
+/* IOCTLs for E-ink panel updates, kindle firmware version >= 5.1 */
+#define MXCFB_SEND_UPDATE51 _IOW('F', 0x2E, struct mxcfb_update_data51)
+
 #ifdef __KERNEL__
 
 extern struct fb_videomode mxcfb_modedb[];

From e80987c430326ce0e22f0eb61314bfb949e5f23a Mon Sep 17 00:00:00 2001
From: Qingping Hou <dave2008713@gmail.com>
Date: Mon, 10 Dec 2012 20:21:04 -0500
Subject: [PATCH 08/12] rename mxcfb_update_data51 to mxcfb_update_data

as suggested by eureka@mobileread:
http://www.mobileread.com/forums/showthread.php?p=2337061#post2337061
---
 einkfb.c        |  9 +++++----
 include/mxcfb.h | 14 ++++++++------
 2 files changed, 13 insertions(+), 10 deletions(-)

diff --git a/einkfb.c b/einkfb.c
index f4a10a8bb..af237db63 100644
--- a/einkfb.c
+++ b/einkfb.c
@@ -96,7 +96,7 @@ inline void fillUpdateAreaT(update_area_t *myarea, FBInfo *fb, lua_State *L) {
 	myarea->which_fx = fxtype ? fx_update_partial : fx_update_full;
 }
 
-inline void fillMxcfbUpdateData51(mxcfb_update_data51 *myarea, FBInfo *fb, lua_State *L) {
+inline void fillMxcfbUpdateData(mxcfb_update_data *myarea, FBInfo *fb, lua_State *L) {
 	myarea->update_region.top = luaL_optint(L, 3, 0);
 	myarea->update_region.left = luaL_optint(L, 4, 0);
 	myarea->update_region.width = luaL_optint(L, 5, fb->vinfo.xres);
@@ -135,13 +135,14 @@ void kindle4einkUpdate(FBInfo *fb, lua_State *L) {
 	ioctl(fb->fd, FBIO_EINK_UPDATE_DISPLAY_AREA, &myarea);
 }
 
+/* for kindle firmware with version >= 5.1, 5.0 is not supported for now */
 void kindle51einkUpdate(FBInfo *fb, lua_State *L) {
-	mxcfb_update_data51 myarea;
+	mxcfb_update_data myarea;
 
 	fb4BppTo8Bpp(fb);
-	fillMxcfbUpdateData51(&myarea, fb, L);
+	fillMxcfbUpdateData(&myarea, fb, L);
 
-	ioctl(fb->fd, MXCFB_SEND_UPDATE51, &myarea);
+	ioctl(fb->fd, MXCFB_SEND_UPDATE, &myarea);
 }
 #endif	
 
diff --git a/include/mxcfb.h b/include/mxcfb.h
index 4e313299b..a933ef1ad 100644
--- a/include/mxcfb.h
+++ b/include/mxcfb.h
@@ -1,7 +1,7 @@
 /*
  * Copyright 2004-2011 Freescale Semiconductor, Inc. All Rights Reserved.
  *
- * - Modified by houqp, added mxcfb_update_data51 struct from GeekMaster's
+ * - Modified by houqp, added mxcfb_update_data struct from GeekMaster's
  *   video player, refer to:
  *   http://www.mobileread.com/forums/showthread.php?t=177455&page=10
  *
@@ -107,7 +107,7 @@ struct mxcfb_alt_buffer_data {
 	struct mxcfb_rect alt_update_region;	/* region within buffer to update */
 };
 
-struct mxcfb_update_data51 {
+struct mxcfb_update_data {
 	struct mxcfb_rect update_region;
 	__u32 waveform_mode;
 	__u32 update_mode;
@@ -118,9 +118,11 @@ struct mxcfb_update_data51 {
 	uint flags;
 	struct mxcfb_alt_buffer_data alt_buffer_data;
 };
-typedef struct mxcfb_update_data51 mxcfb_update_data51;
+typedef struct mxcfb_update_data mxcfb_update_data;
 
-struct mxcfb_update_data {
+/* this is only used in kindle firmware 5.0, later version (5.1) has changed
+ * the struct to mxcfb_update_data (see above) */
+struct mxcfb_update_data_50x {
 	struct mxcfb_rect update_region;
 	__u32 waveform_mode;
 	__u32 update_mode;
@@ -160,7 +162,7 @@ struct mxcfb_waveform_modes {
 #define MXCFB_SET_WAVEFORM_MODES	_IOW('F', 0x2B, struct mxcfb_waveform_modes)
 #define MXCFB_SET_TEMPERATURE		_IOW('F', 0x2C, int32_t)
 #define MXCFB_SET_AUTO_UPDATE_MODE	_IOW('F', 0x2D, __u32)
-#define MXCFB_SEND_UPDATE		_IOW('F', 0x2E, struct mxcfb_update_data)
+#define MXCFB_SEND_UPDATE_50X		_IOW('F', 0x2E, struct mxcfb_update_data_50x)
 #define MXCFB_WAIT_FOR_UPDATE_COMPLETE	_IOW('F', 0x2F, __u32)
 #define MXCFB_SET_PWRDOWN_DELAY		_IOW('F', 0x30, int32_t)
 #define MXCFB_GET_PWRDOWN_DELAY		_IOR('F', 0x31, int32_t)
@@ -173,7 +175,7 @@ struct mxcfb_waveform_modes {
 #define MXCFB_SET_MERGE_ON_WAVEFORM_MISMATCH	_IOW('F', 0x37, int32_t)
 
 /* IOCTLs for E-ink panel updates, kindle firmware version >= 5.1 */
-#define MXCFB_SEND_UPDATE51 _IOW('F', 0x2E, struct mxcfb_update_data51)
+#define MXCFB_SEND_UPDATE _IOW('F', 0x2E, struct mxcfb_update_data)
 
 #ifdef __KERNEL__
 

From c8d43cd33c4408c26693058490690bc65419010c Mon Sep 17 00:00:00 2001
From: Qingping Hou <dave2008713@gmail.com>
Date: Mon, 10 Dec 2012 20:58:16 -0500
Subject: [PATCH 09/12] add Input:eventAdjustHook(ev)

so we can adjust input event for KT on the fly.
the touch input event coordinates in KT ranges from 0-4095
instead of the screen size.
---
 frontend/ui/geometry.lua        |  4 ++++
 frontend/ui/gesturedetector.lua | 14 --------------
 frontend/ui/inputevent.lua      | 33 +++++++++++++++++++++++++++++++++
 3 files changed, 37 insertions(+), 14 deletions(-)

diff --git a/frontend/ui/geometry.lua b/frontend/ui/geometry.lua
index b50a07d85..3eefdbd75 100644
--- a/frontend/ui/geometry.lua
+++ b/frontend/ui/geometry.lua
@@ -274,4 +274,8 @@ function math.roundAwayFromZero(num)
 	end
 end
 
+function math.round(num)
+	return math.floor(num + 0.5)
+end
+
 
diff --git a/frontend/ui/gesturedetector.lua b/frontend/ui/gesturedetector.lua
index 9d1fc01bb..0c7f4d902 100644
--- a/frontend/ui/gesturedetector.lua
+++ b/frontend/ui/gesturedetector.lua
@@ -1,18 +1,5 @@
 require "ui/geometry"
 
--- Synchronization events (SYN.code).
-SYN_REPORT = 0
-SYN_CONFIG = 1
-SYN_MT_REPORT = 2
-
--- For multi-touch events (ABS.code).
-ABS_MT_SLOT = 47
-ABS_MT_POSITION_X = 53
-ABS_MT_POSITION_Y = 54
-ABS_MT_TRACKING_ID = 57
-ABS_MT_PRESSURE = 58
-
-
 GestureRange = {
 	ges = nil,
 	range = nil,
@@ -207,7 +194,6 @@ function GestureDetector:tapState(ev)
 				sec = 0, usec = self.HOLD_INTERVAL
 			}
 		Input:setTimeout(function()
-			print("hold timer", self.state == self.tapState)
 			if self.state == self.tapState then
 				-- timer set in tapState, so we switch to hold
 				return self:switchState("holdState")
diff --git a/frontend/ui/inputevent.lua b/frontend/ui/inputevent.lua
index a7b52f590..8866cd0fb 100644
--- a/frontend/ui/inputevent.lua
+++ b/frontend/ui/inputevent.lua
@@ -14,6 +14,19 @@ EVENT_VALUE_KEY_PRESS = 1
 EVENT_VALUE_KEY_REPEAT = 2
 EVENT_VALUE_KEY_RELEASE = 0
 
+-- Synchronization events (SYN.code).
+SYN_REPORT = 0
+SYN_CONFIG = 1
+SYN_MT_REPORT = 2
+
+-- For multi-touch events (ABS.code).
+ABS_MT_SLOT = 47
+ABS_MT_POSITION_X = 53
+ABS_MT_POSITION_Y = 54
+ABS_MT_TRACKING_ID = 57
+ABS_MT_PRESSURE = 58
+
+
 
 --[[
 an interface for key presses
@@ -253,6 +266,16 @@ function Input:init()
 		elseif dev_mod == "KindleTouch" then
 			input.open("/dev/input/event2") -- Home button
 			input.open("/dev/input/event3") -- touchscreen
+			-- update event hook
+			function Input:eventAdjustHook(ev)
+				if ev.type == EV_ABS then
+					if ev.code == ABS_MT_POSITION_X then
+						ev.code = math.round(ev.code * (600/4095))
+					elseif ev.code == ABS_MT_POSITION_Y then
+						ev.code = math.round(ev.code * (800/4095))
+					end
+				end
+			end
 			print("Auto-detected Kindle Touch")
 		elseif dev_mod == "Kindle4" then
 			print("Auto-detected Kindle 4")
@@ -271,6 +294,15 @@ function Input:init()
 	end
 end
 
+--[[
+different device models shoudl overload this method if
+necessary to make event compatible to KPV.
+--]]
+function Input:eventAdjustHook(ev)
+	-- do nothing by default
+	return ev
+end
+
 function Input:adjustKindle4EventMap()
 	self.event_map[193] = "LPgBack"
 	self.event_map[104] = "LPgFwd"
@@ -342,6 +374,7 @@ function Input:waitEvent(timeout_us, timeout_s)
 		end
 	end
 	if ok and ev then
+		ev = self:eventAdjustHook(ev)
 		if ev.type == EV_KEY then
 			local keycode = self.event_map[ev.code]
 			if not keycode then

From b253a774f649b6967665bb40f19a350f51cf05b1 Mon Sep 17 00:00:00 2001
From: Qingping Hou <dave2008713@gmail.com>
Date: Mon, 10 Dec 2012 21:05:35 -0500
Subject: [PATCH 10/12] added TODO in Input:init in case I forget it in the
 future

---
 frontend/ui/inputevent.lua | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/frontend/ui/inputevent.lua b/frontend/ui/inputevent.lua
index 8866cd0fb..daa21ec40 100644
--- a/frontend/ui/inputevent.lua
+++ b/frontend/ui/inputevent.lua
@@ -269,6 +269,8 @@ function Input:init()
 			-- update event hook
 			function Input:eventAdjustHook(ev)
 				if ev.type == EV_ABS then
+					--@TODO handle coordinates properly after
+					--screen rotate.    (houqp)
 					if ev.code == ABS_MT_POSITION_X then
 						ev.code = math.round(ev.code * (600/4095))
 					elseif ev.code == ABS_MT_POSITION_Y then

From 424776b564b00522ba26e4e6c341c4dbcfb4ed85 Mon Sep 17 00:00:00 2001
From: eureka <@mobileread.com>
Date: Tue, 11 Dec 2012 13:14:41 +0800
Subject: [PATCH 11/12] fix bug in eventhook for KT

* no return
* it is value that should be changed
---
 frontend/ui/inputevent.lua | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/frontend/ui/inputevent.lua b/frontend/ui/inputevent.lua
index daa21ec40..4c5712d0a 100644
--- a/frontend/ui/inputevent.lua
+++ b/frontend/ui/inputevent.lua
@@ -272,11 +272,12 @@ function Input:init()
 					--@TODO handle coordinates properly after
 					--screen rotate.    (houqp)
 					if ev.code == ABS_MT_POSITION_X then
-						ev.code = math.round(ev.code * (600/4095))
+						ev.value = math.round(ev.value * (600/4095))
 					elseif ev.code == ABS_MT_POSITION_Y then
-						ev.code = math.round(ev.code * (800/4095))
+						ev.value = math.round(ev.value * (800/4095))
 					end
 				end
+				return ev
 			end
 			print("Auto-detected Kindle Touch")
 		elseif dev_mod == "Kindle4" then

From 309af296db1893562c2f26f6af92c868366a3ec3 Mon Sep 17 00:00:00 2001
From: Qingping Hou <dave2008713@gmail.com>
Date: Wed, 12 Dec 2012 09:35:49 +0800
Subject: [PATCH 12/12] read document configuration files from history dir

this feature was introduced by @NuPogodi in old KPV
---
 frontend/settings.lua       | 32 ++++++++++++++++++++++++++++++--
 frontend/ui/filechooser.lua |  2 +-
 2 files changed, 31 insertions(+), 3 deletions(-)

diff --git a/frontend/settings.lua b/frontend/settings.lua
index 757b14b3a..638484488 100644
--- a/frontend/settings.lua
+++ b/frontend/settings.lua
@@ -1,8 +1,36 @@
 DocSettings = {}
 
+function DocSettings:getHistoryPath(fullpath)
+	local i = #fullpath - 1
+	-- search for last slash
+	while i > 0 do
+		if fullpath:sub(i,i) == "/" then
+			break
+		end
+		i = i - 1
+	end
+	-- construct path to configuration file in history dir
+	local filename = fullpath:sub(i+1, -1)
+	local basename = fullpath:sub(1, i)
+	return "./history/["..basename:gsub("/","#").."] "..filename..".lua"
+end
+
 function DocSettings:open(docfile)
-	local new = { file = docfile..".kpdfview.lua", data = {} }
-	local ok, stored = pcall(dofile,new.file)
+	local conf_path = nil
+	if docfile == ".reader" then
+		-- we handle reader setting as special case
+		conf_path = "settings.reader.lua"
+	else
+		conf_path = self:getHistoryPath(docfile)
+	end
+	-- construct settings obj
+	local new = { file = conf_path, data = {} }
+	local ok, stored = pcall(dofile, new.file)
+	if not ok then
+		-- try legacy conf path, for backward compatibility. this also
+		-- takes care of reader legacy setting
+		ok, stored = pcall(dofile, docfile..".kpdfview.lua")
+	end
 	if ok then
 		new.data = stored
 	end
diff --git a/frontend/ui/filechooser.lua b/frontend/ui/filechooser.lua
index dbfbf044f..8be30e3cb 100644
--- a/frontend/ui/filechooser.lua
+++ b/frontend/ui/filechooser.lua
@@ -3,7 +3,7 @@ require "ui/menu"
 FileChooser = Menu:new{
 	height = Screen:getHeight(),
 	width = Screen:getWidth(),
-	path = ".",
+	path = lfs.currentdir(),
 	parent = nil,
 	show_hidden = false,
 	filter = function(filename) return true end,