diff --git a/scripts/pybootchartgui/pybootchartgui/draw.py b/scripts/pybootchartgui/pybootchartgui/draw.py
new file mode 100644
index 0000000..8c574be
--- /dev/null
+++ b/scripts/pybootchartgui/pybootchartgui/draw.py
@@ -0,0 +1,894 @@
+#  This file is part of pybootchartgui.
+
+#  pybootchartgui 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.
+
+#  pybootchartgui 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 pybootchartgui. If not, see <http://www.gnu.org/licenses/>.
+
+
+import cairo
+import math
+import re
+import random
+import colorsys
+from operator import itemgetter
+
+class RenderOptions:
+
+	def __init__(self, app_options):
+		# should we render a cumulative CPU time chart
+		self.cumulative = True
+		self.charts = True
+		self.kernel_only = False
+		self.app_options = app_options
+
+	def proc_tree (self, trace):
+		if self.kernel_only:
+			return trace.kernel_tree
+		else:
+			return trace.proc_tree
+
+# Process tree background color.
+BACK_COLOR = (1.0, 1.0, 1.0, 1.0)
+
+WHITE = (1.0, 1.0, 1.0, 1.0)
+# Process tree border color.
+BORDER_COLOR = (0.63, 0.63, 0.63, 1.0)
+# Second tick line color.
+TICK_COLOR = (0.92, 0.92, 0.92, 1.0)
+# 5-second tick line color.
+TICK_COLOR_BOLD = (0.86, 0.86, 0.86, 1.0)
+# Annotation colour
+ANNOTATION_COLOR = (0.63, 0.0, 0.0, 0.5)
+# Text color.
+TEXT_COLOR = (0.0, 0.0, 0.0, 1.0)
+
+# Font family
+FONT_NAME = "Bitstream Vera Sans"
+# Title text font.
+TITLE_FONT_SIZE = 18
+# Default text font.
+TEXT_FONT_SIZE = 12
+# Axis label font.
+AXIS_FONT_SIZE = 11
+# Legend font.
+LEGEND_FONT_SIZE = 12
+
+# CPU load chart color.
+CPU_COLOR = (0.40, 0.55, 0.70, 1.0)
+# IO wait chart color.
+IO_COLOR = (0.76, 0.48, 0.48, 0.5)
+# Disk throughput color.
+DISK_TPUT_COLOR = (0.20, 0.71, 0.20, 1.0)
+# CPU load chart color.
+FILE_OPEN_COLOR = (0.20, 0.71, 0.71, 1.0)
+# Mem cached color
+MEM_CACHED_COLOR = CPU_COLOR
+# Mem used color
+MEM_USED_COLOR = IO_COLOR
+# Buffers color
+MEM_BUFFERS_COLOR = (0.4, 0.4, 0.4, 0.3)
+# Swap color
+MEM_SWAP_COLOR = DISK_TPUT_COLOR
+
+# Process border color.
+PROC_BORDER_COLOR = (0.71, 0.71, 0.71, 1.0)
+# Waiting process color.
+PROC_COLOR_D = (0.76, 0.48, 0.48, 0.5)
+# Running process color.
+PROC_COLOR_R = CPU_COLOR
+# Sleeping process color.
+PROC_COLOR_S = (0.94, 0.94, 0.94, 1.0)
+# Stopped process color.
+PROC_COLOR_T = (0.94, 0.50, 0.50, 1.0)
+# Zombie process color.
+PROC_COLOR_Z = (0.71, 0.71, 0.71, 1.0)
+# Dead process color.
+PROC_COLOR_X = (0.71, 0.71, 0.71, 0.125)
+# Paging process color.
+PROC_COLOR_W = (0.71, 0.71, 0.71, 0.125)
+
+# Process label color.
+PROC_TEXT_COLOR = (0.19, 0.19, 0.19, 1.0)
+# Process label font.
+PROC_TEXT_FONT_SIZE = 12
+
+# Signature color.
+SIG_COLOR = (0.0, 0.0, 0.0, 0.3125)
+# Signature font.
+SIG_FONT_SIZE = 14
+# Signature text.
+SIGNATURE = "http://github.com/mmeeks/bootchart"
+
+# Process dependency line color.
+DEP_COLOR = (0.75, 0.75, 0.75, 1.0)
+# Process dependency line stroke.
+DEP_STROKE = 1.0
+
+# Process description date format.
+DESC_TIME_FORMAT = "mm:ss.SSS"
+
+# Cumulative coloring bits
+HSV_MAX_MOD = 31
+HSV_STEP = 7
+
+# Configure task color
+TASK_COLOR_CONFIGURE = (1.0, 1.0, 0.00, 1.0)
+# Compile task color.
+TASK_COLOR_COMPILE = (0.0, 1.00, 0.00, 1.0)
+# Install task color
+TASK_COLOR_INSTALL = (1.0, 0.00, 1.00, 1.0)
+# Sysroot task color
+TASK_COLOR_SYSROOT = (0.0, 0.00, 1.00, 1.0)
+# Package task color
+TASK_COLOR_PACKAGE = (0.0, 1.00, 1.00, 1.0)
+# Package Write RPM/DEB/IPK task color
+TASK_COLOR_PACKAGE_WRITE = (0.0, 0.50, 0.50, 1.0)
+
+# Process states
+STATE_UNDEFINED = 0
+STATE_RUNNING   = 1
+STATE_SLEEPING  = 2
+STATE_WAITING   = 3
+STATE_STOPPED   = 4
+STATE_ZOMBIE    = 5
+
+STATE_COLORS = [(0, 0, 0, 0), PROC_COLOR_R, PROC_COLOR_S, PROC_COLOR_D, \
+		PROC_COLOR_T, PROC_COLOR_Z, PROC_COLOR_X, PROC_COLOR_W]
+
+# CumulativeStats Types
+STAT_TYPE_CPU = 0
+STAT_TYPE_IO = 1
+
+# Convert ps process state to an int
+def get_proc_state(flag):
+	return "RSDTZXW".find(flag) + 1
+
+def draw_text(ctx, text, color, x, y):
+	ctx.set_source_rgba(*color)
+	ctx.move_to(x, y)
+	ctx.show_text(text)
+
+def draw_fill_rect(ctx, color, rect):
+	ctx.set_source_rgba(*color)
+	ctx.rectangle(*rect)
+	ctx.fill()
+
+def draw_rect(ctx, color, rect):
+	ctx.set_source_rgba(*color)
+	ctx.rectangle(*rect)
+	ctx.stroke()
+
+def draw_legend_box(ctx, label, fill_color, x, y, s):
+	draw_fill_rect(ctx, fill_color, (x, y - s, s, s))
+	draw_rect(ctx, PROC_BORDER_COLOR, (x, y - s, s, s))
+	draw_text(ctx, label, TEXT_COLOR, x + s + 5, y)
+
+def draw_legend_line(ctx, label, fill_color, x, y, s):
+	draw_fill_rect(ctx, fill_color, (x, y - s/2, s + 1, 3))
+	ctx.arc(x + (s + 1)/2.0, y - (s - 3)/2.0, 2.5, 0, 2.0 * math.pi)
+	ctx.fill()
+	draw_text(ctx, label, TEXT_COLOR, x + s + 5, y)
+
+def draw_label_in_box(ctx, color, label, x, y, w, maxx):
+	label_w = ctx.text_extents(label)[2]
+	label_x = x + w / 2 - label_w / 2
+	if label_w + 10 > w:
+		label_x = x + w + 5
+	if label_x + label_w > maxx:
+		label_x = x - label_w - 5
+	draw_text(ctx, label, color, label_x, y)
+
+def draw_sec_labels(ctx, options, rect, sec_w, nsecs):
+	ctx.set_font_size(AXIS_FONT_SIZE)
+	prev_x = 0
+	for i in range(0, rect[2] + 1, sec_w):
+		if ((i / sec_w) % nsecs == 0) :
+			if options.app_options.as_minutes :
+				label = "%.1f" % (i / sec_w / 60.0)
+			else :
+				label = "%d" % (i / sec_w)
+			label_w = ctx.text_extents(label)[2]
+			x = rect[0] + i - label_w/2
+			if x >= prev_x:
+				draw_text(ctx, label, TEXT_COLOR, x, rect[1] - 2)
+				prev_x = x + label_w
+
+def draw_box_ticks(ctx, rect, sec_w):
+	draw_rect(ctx, BORDER_COLOR, tuple(rect))
+
+	ctx.set_line_cap(cairo.LINE_CAP_SQUARE)
+
+	for i in range(sec_w, rect[2] + 1, sec_w):
+		if ((i / sec_w) % 10 == 0) :
+			ctx.set_line_width(1.5)
+		elif sec_w < 5 :
+			continue
+		else :
+			ctx.set_line_width(1.0)
+		if ((i / sec_w) % 30 == 0) :
+			ctx.set_source_rgba(*TICK_COLOR_BOLD)
+		else :
+			ctx.set_source_rgba(*TICK_COLOR)
+		ctx.move_to(rect[0] + i, rect[1] + 1)
+		ctx.line_to(rect[0] + i, rect[1] + rect[3] - 1)
+		ctx.stroke()
+	ctx.set_line_width(1.0)
+
+	ctx.set_line_cap(cairo.LINE_CAP_BUTT)
+
+def draw_annotations(ctx, proc_tree, times, rect):
+    ctx.set_line_cap(cairo.LINE_CAP_SQUARE)
+    ctx.set_source_rgba(*ANNOTATION_COLOR)
+    ctx.set_dash([4, 4])
+
+    for time in times:
+        if time is not None:
+            x = ((time - proc_tree.start_time) * rect[2] / proc_tree.duration)
+
+            ctx.move_to(rect[0] + x, rect[1] + 1)
+            ctx.line_to(rect[0] + x, rect[1] + rect[3] - 1)
+            ctx.stroke()
+
+    ctx.set_line_cap(cairo.LINE_CAP_BUTT)
+    ctx.set_dash([])
+
+def draw_chart(ctx, color, fill, chart_bounds, data, proc_tree, data_range):
+	ctx.set_line_width(0.5)
+	x_shift = proc_tree.start_time
+
+	def transform_point_coords(point, x_base, y_base, \
+				   xscale, yscale, x_trans, y_trans):
+		x = (point[0] - x_base) * xscale + x_trans
+		y = (point[1] - y_base) * -yscale + y_trans + chart_bounds[3]
+		return x, y
+
+	max_x = max (x for (x, y) in data)
+	max_y = max (y for (x, y) in data)
+	# avoid divide by zero
+	if max_y == 0:
+		max_y = 1.0
+	xscale = float (chart_bounds[2]) / max_x
+	# If data_range is given, scale the chart so that the value range in
+	# data_range matches the chart bounds exactly.
+	# Otherwise, scale so that the actual data matches the chart bounds.
+	if data_range:
+		yscale = float(chart_bounds[3]) / (data_range[1] - data_range[0])
+		ybase = data_range[0]
+	else:
+		yscale = float(chart_bounds[3]) / max_y
+		ybase = 0
+
+	first = transform_point_coords (data[0], x_shift, ybase, xscale, yscale, \
+				        chart_bounds[0], chart_bounds[1])
+	last =  transform_point_coords (data[-1], x_shift, ybase, xscale, yscale, \
+				        chart_bounds[0], chart_bounds[1])
+
+	ctx.set_source_rgba(*color)
+	ctx.move_to(*first)
+	for point in data:
+		x, y = transform_point_coords (point, x_shift, ybase, xscale, yscale, \
+					       chart_bounds[0], chart_bounds[1])
+		ctx.line_to(x, y)
+	if fill:
+		ctx.stroke_preserve()
+		ctx.line_to(last[0], chart_bounds[1]+chart_bounds[3])
+		ctx.line_to(first[0], chart_bounds[1]+chart_bounds[3])
+		ctx.line_to(first[0], first[1])
+		ctx.fill()
+	else:
+		ctx.stroke()
+	ctx.set_line_width(1.0)
+
+bar_h = 55
+meminfo_bar_h = 2 * bar_h
+header_h = 60
+# offsets
+off_x, off_y = 220, 10
+sec_w_base = 1 # the width of a second
+proc_h = 16 # the height of a process
+leg_s = 10
+MIN_IMG_W = 800
+CUML_HEIGHT = 2000 # Increased value to accomodate CPU and I/O Graphs
+OPTIONS = None
+
+def extents(options, xscale, trace):
+	start = min(trace.start.keys())
+	end = start
+
+        processes = 0
+        for proc in trace.processes:
+                if not options.app_options.show_all and \
+                   trace.processes[proc][1] - trace.processes[proc][0] < options.app_options.mintime:
+                        continue
+
+                if trace.processes[proc][1] > end:
+                        end = trace.processes[proc][1]
+                processes += 1
+
+	if trace.min is not None and trace.max is not None:
+		start = trace.min
+		end = trace.max
+
+	w = int ((end - start) * sec_w_base * xscale) + 2 * off_x
+	h = proc_h * processes + header_h + 2 * off_y
+
+	return (w, h)
+
+def clip_visible(clip, rect):
+	xmax = max (clip[0], rect[0])
+	ymax = max (clip[1], rect[1])
+	xmin = min (clip[0] + clip[2], rect[0] + rect[2])
+	ymin = min (clip[1] + clip[3], rect[1] + rect[3])
+	return (xmin > xmax and ymin > ymax)
+
+def render_charts(ctx, options, clip, trace, curr_y, w, h, sec_w):
+	proc_tree = options.proc_tree(trace)
+
+	# render bar legend
+	ctx.set_font_size(LEGEND_FONT_SIZE)
+
+	draw_legend_box(ctx, "CPU (user+sys)", CPU_COLOR, off_x, curr_y+20, leg_s)
+	draw_legend_box(ctx, "I/O (wait)", IO_COLOR, off_x + 120, curr_y+20, leg_s)
+
+	# render I/O wait
+	chart_rect = (off_x, curr_y+30, w, bar_h)
+	if clip_visible (clip, chart_rect):
+		draw_box_ticks (ctx, chart_rect, sec_w)
+		draw_annotations (ctx, proc_tree, trace.times, chart_rect)
+		draw_chart (ctx, IO_COLOR, True, chart_rect, \
+			    [(sample.time, sample.user + sample.sys + sample.io) for sample in trace.cpu_stats], \
+			    proc_tree, None)
+		# render CPU load
+		draw_chart (ctx, CPU_COLOR, True, chart_rect, \
+			    [(sample.time, sample.user + sample.sys) for sample in trace.cpu_stats], \
+			    proc_tree, None)
+
+	curr_y = curr_y + 30 + bar_h
+
+	# render second chart
+	draw_legend_line(ctx, "Disk throughput", DISK_TPUT_COLOR, off_x, curr_y+20, leg_s)
+	draw_legend_box(ctx, "Disk utilization", IO_COLOR, off_x + 120, curr_y+20, leg_s)
+
+        # render I/O utilization
+	chart_rect = (off_x, curr_y+30, w, bar_h)
+	if clip_visible (clip, chart_rect):
+		draw_box_ticks (ctx, chart_rect, sec_w)
+		draw_annotations (ctx, proc_tree, trace.times, chart_rect)
+		draw_chart (ctx, IO_COLOR, True, chart_rect, \
+			    [(sample.time, sample.util) for sample in trace.disk_stats], \
+			    proc_tree, None)
+
+	# render disk throughput
+	max_sample = max (trace.disk_stats, key = lambda s: s.tput)
+	if clip_visible (clip, chart_rect):
+		draw_chart (ctx, DISK_TPUT_COLOR, False, chart_rect, \
+			    [(sample.time, sample.tput) for sample in trace.disk_stats], \
+			    proc_tree, None)
+
+	pos_x = off_x + ((max_sample.time - proc_tree.start_time) * w / proc_tree.duration)
+
+	shift_x, shift_y = -20, 20
+	if (pos_x < off_x + 245):
+		shift_x, shift_y = 5, 40
+
+	label = "%dMB/s" % round ((max_sample.tput) / 1024.0)
+	draw_text (ctx, label, DISK_TPUT_COLOR, pos_x + shift_x, curr_y + shift_y)
+
+	curr_y = curr_y + 30 + bar_h
+
+	# render mem usage
+	chart_rect = (off_x, curr_y+30, w, meminfo_bar_h)
+	mem_stats = trace.mem_stats
+	if mem_stats and clip_visible (clip, chart_rect):
+		mem_scale = max(sample.records['MemTotal'] - sample.records['MemFree'] for sample in mem_stats)
+		draw_legend_box(ctx, "Mem cached (scale: %u MiB)" % (float(mem_scale) / 1024), MEM_CACHED_COLOR, off_x, curr_y+20, leg_s)
+		draw_legend_box(ctx, "Used", MEM_USED_COLOR, off_x + 240, curr_y+20, leg_s)
+		draw_legend_box(ctx, "Buffers", MEM_BUFFERS_COLOR, off_x + 360, curr_y+20, leg_s)
+		draw_legend_line(ctx, "Swap (scale: %u MiB)" % max([(sample.records['SwapTotal'] - sample.records['SwapFree'])/1024 for sample in mem_stats]), \
+				 MEM_SWAP_COLOR, off_x + 480, curr_y+20, leg_s)
+		draw_box_ticks(ctx, chart_rect, sec_w)
+		draw_annotations(ctx, proc_tree, trace.times, chart_rect)
+		draw_chart(ctx, MEM_BUFFERS_COLOR, True, chart_rect, \
+			   [(sample.time, sample.records['MemTotal'] - sample.records['MemFree']) for sample in trace.mem_stats], \
+			   proc_tree, [0, mem_scale])
+		draw_chart(ctx, MEM_USED_COLOR, True, chart_rect, \
+			   [(sample.time, sample.records['MemTotal'] - sample.records['MemFree'] - sample.records['Buffers']) for sample in mem_stats], \
+			   proc_tree, [0, mem_scale])
+		draw_chart(ctx, MEM_CACHED_COLOR, True, chart_rect, \
+			   [(sample.time, sample.records['Cached']) for sample in mem_stats], \
+			   proc_tree, [0, mem_scale])
+		draw_chart(ctx, MEM_SWAP_COLOR, False, chart_rect, \
+			   [(sample.time, float(sample.records['SwapTotal'] - sample.records['SwapFree'])) for sample in mem_stats], \
+			   proc_tree, None)
+
+		curr_y = curr_y + meminfo_bar_h
+
+	return curr_y
+
+def render_processes_chart(ctx, options, trace, curr_y, w, h, sec_w):
+        chart_rect = [off_x, curr_y+header_h, w, h - 2 * off_y - (curr_y+header_h) + proc_h]
+
+	draw_legend_box (ctx, "Configure", \
+			 TASK_COLOR_CONFIGURE, off_x  , curr_y + 45, leg_s)
+	draw_legend_box (ctx, "Compile", \
+			 TASK_COLOR_COMPILE, off_x+120, curr_y + 45, leg_s)
+	draw_legend_box (ctx, "Install", \
+			 TASK_COLOR_INSTALL, off_x+240, curr_y + 45, leg_s)
+	draw_legend_box (ctx, "Populate Sysroot", \
+			 TASK_COLOR_SYSROOT, off_x+360, curr_y + 45, leg_s)
+	draw_legend_box (ctx, "Package", \
+			 TASK_COLOR_PACKAGE, off_x+480, curr_y + 45, leg_s)
+	draw_legend_box (ctx, "Package Write",
+			 TASK_COLOR_PACKAGE_WRITE, off_x+600, curr_y + 45, leg_s)
+
+	ctx.set_font_size(PROC_TEXT_FONT_SIZE)
+
+	draw_box_ticks(ctx, chart_rect, sec_w)
+	draw_sec_labels(ctx, options, chart_rect, sec_w, 30)
+
+	y = curr_y+header_h
+
+        offset = trace.min or min(trace.start.keys())
+        for s in sorted(trace.start.keys()):
+            for val in sorted(trace.start[s]):
+                if not options.app_options.show_all and \
+                   trace.processes[val][1] - s < options.app_options.mintime:
+                    continue
+                task = val.split(":")[1]
+                #print val
+                #print trace.processes[val][1]
+                #print s
+                x = chart_rect[0] + (s - offset) * sec_w
+                w = ((trace.processes[val][1] - s) * sec_w)
+
+                #print "proc at %s %s %s %s" % (x, y, w, proc_h)
+                col = None
+                if task == "do_compile":
+                    col = TASK_COLOR_COMPILE
+                elif task == "do_configure":
+                    col = TASK_COLOR_CONFIGURE
+                elif task == "do_install":
+                    col = TASK_COLOR_INSTALL
+                elif task == "do_populate_sysroot":
+                    col = TASK_COLOR_SYSROOT
+                elif task == "do_package":
+                    col = TASK_COLOR_PACKAGE
+                elif task == "do_package_write_rpm" or \
+                     task == "do_package_write_deb" or \
+                     task == "do_package_write_ipk":
+                    col = TASK_COLOR_PACKAGE_WRITE
+                else:
+                    col = WHITE
+
+                if col:
+                    draw_fill_rect(ctx, col, (x, y, w, proc_h))
+                draw_rect(ctx, PROC_BORDER_COLOR, (x, y, w, proc_h))
+
+                draw_label_in_box(ctx, PROC_TEXT_COLOR, val, x, y + proc_h - 4, w, proc_h)
+                y = y + proc_h
+
+	return curr_y
+
+#
+# Render the chart.
+#
+def render(ctx, options, xscale, trace):
+	(w, h) = extents (options, xscale, trace)
+	global OPTIONS
+	OPTIONS = options.app_options
+
+	# x, y, w, h
+	clip = ctx.clip_extents()
+
+	sec_w = int (xscale * sec_w_base)
+	ctx.set_line_width(1.0)
+	ctx.select_font_face(FONT_NAME)
+	draw_fill_rect(ctx, WHITE, (0, 0, max(w, MIN_IMG_W), h))
+	w -= 2*off_x
+	curr_y = off_y;
+
+	curr_y = render_processes_chart (ctx, options, trace, curr_y, w, h, sec_w)
+
+	return
+
+	proc_tree = options.proc_tree (trace)
+
+	# draw the title and headers
+	if proc_tree.idle:
+		duration = proc_tree.idle
+	else:
+		duration = proc_tree.duration
+
+	if not options.kernel_only:
+		curr_y = draw_header (ctx, trace.headers, duration)
+	else:
+		curr_y = off_y;
+
+	if options.charts:
+		curr_y = render_charts (ctx, options, clip, trace, curr_y, w, h, sec_w)
+
+	# draw process boxes
+	proc_height = h
+	if proc_tree.taskstats and options.cumulative:
+		proc_height -= CUML_HEIGHT
+
+	draw_process_bar_chart(ctx, clip, options, proc_tree, trace.times,
+			       curr_y, w, proc_height, sec_w)
+
+	curr_y = proc_height
+	ctx.set_font_size(SIG_FONT_SIZE)
+	draw_text(ctx, SIGNATURE, SIG_COLOR, off_x + 5, proc_height - 8)
+
+	# draw a cumulative CPU-time-per-process graph
+	if proc_tree.taskstats and options.cumulative:
+		cuml_rect = (off_x, curr_y + off_y, w, CUML_HEIGHT/2 - off_y * 2)
+		if clip_visible (clip, cuml_rect):
+			draw_cuml_graph(ctx, proc_tree, cuml_rect, duration, sec_w, STAT_TYPE_CPU)
+
+	# draw a cumulative I/O-time-per-process graph
+	if proc_tree.taskstats and options.cumulative:
+		cuml_rect = (off_x, curr_y + off_y * 100, w, CUML_HEIGHT/2 - off_y * 2)
+		if clip_visible (clip, cuml_rect):
+			draw_cuml_graph(ctx, proc_tree, cuml_rect, duration, sec_w, STAT_TYPE_IO)
+
+def draw_process_bar_chart(ctx, clip, options, proc_tree, times, curr_y, w, h, sec_w):
+	header_size = 0
+	if not options.kernel_only:
+		draw_legend_box (ctx, "Running (%cpu)",
+				 PROC_COLOR_R, off_x    , curr_y + 45, leg_s)
+		draw_legend_box (ctx, "Unint.sleep (I/O)",
+				 PROC_COLOR_D, off_x+120, curr_y + 45, leg_s)
+		draw_legend_box (ctx, "Sleeping",
+				 PROC_COLOR_S, off_x+240, curr_y + 45, leg_s)
+		draw_legend_box (ctx, "Zombie",
+				 PROC_COLOR_Z, off_x+360, curr_y + 45, leg_s)
+		header_size = 45
+
+	chart_rect = [off_x, curr_y + header_size + 15,
+		      w, h - 2 * off_y - (curr_y + header_size + 15) + proc_h]
+	ctx.set_font_size (PROC_TEXT_FONT_SIZE)
+
+	draw_box_ticks (ctx, chart_rect, sec_w)
+	if sec_w > 100:
+		nsec = 1
+	else:
+		nsec = 5
+	draw_sec_labels (ctx, options, chart_rect, sec_w, nsec)
+	draw_annotations (ctx, proc_tree, times, chart_rect)
+
+	y = curr_y + 60
+	for root in proc_tree.process_tree:
+		draw_processes_recursively(ctx, root, proc_tree, y, proc_h, chart_rect, clip)
+		y = y + proc_h * proc_tree.num_nodes([root])
+
+
+def draw_header (ctx, headers, duration):
+    toshow = [
+      ('system.uname', 'uname', lambda s: s),
+      ('system.release', 'release', lambda s: s),
+      ('system.cpu', 'CPU', lambda s: re.sub('model name\s*:\s*', '', s, 1)),
+      ('system.kernel.options', 'kernel options', lambda s: s),
+    ]
+
+    header_y = ctx.font_extents()[2] + 10
+    ctx.set_font_size(TITLE_FONT_SIZE)
+    draw_text(ctx, headers['title'], TEXT_COLOR, off_x, header_y)
+    ctx.set_font_size(TEXT_FONT_SIZE)
+
+    for (headerkey, headertitle, mangle) in toshow:
+        header_y += ctx.font_extents()[2]
+        if headerkey in headers:
+            value = headers.get(headerkey)
+        else:
+            value = ""
+        txt = headertitle + ': ' + mangle(value)
+        draw_text(ctx, txt, TEXT_COLOR, off_x, header_y)
+
+    dur = duration / 100.0
+    txt = 'time : %02d:%05.2f' % (math.floor(dur/60), dur - 60 * math.floor(dur/60))
+    if headers.get('system.maxpid') is not None:
+        txt = txt + '      max pid: %s' % (headers.get('system.maxpid'))
+
+    header_y += ctx.font_extents()[2]
+    draw_text (ctx, txt, TEXT_COLOR, off_x, header_y)
+
+    return header_y
+
+def draw_processes_recursively(ctx, proc, proc_tree, y, proc_h, rect, clip) :
+	x = rect[0] +  ((proc.start_time - proc_tree.start_time) * rect[2] / proc_tree.duration)
+	w = ((proc.duration) * rect[2] / proc_tree.duration)
+
+	draw_process_activity_colors(ctx, proc, proc_tree, x, y, w, proc_h, rect, clip)
+	draw_rect(ctx, PROC_BORDER_COLOR, (x, y, w, proc_h))
+	ipid = int(proc.pid)
+	if not OPTIONS.show_all:
+		cmdString = proc.cmd
+	else:
+		cmdString = ''
+	if (OPTIONS.show_pid or OPTIONS.show_all) and ipid is not 0:
+		cmdString = cmdString + " [" + str(ipid // 1000) + "]"
+	if OPTIONS.show_all:
+		if proc.args:
+			cmdString = cmdString + " '" + "' '".join(proc.args) + "'"
+		else:
+			cmdString = cmdString + " " + proc.exe
+
+	draw_label_in_box(ctx, PROC_TEXT_COLOR, cmdString, x, y + proc_h - 4, w, rect[0] + rect[2])
+
+	next_y = y + proc_h
+	for child in proc.child_list:
+		if next_y > clip[1] + clip[3]:
+			break
+		child_x, child_y = draw_processes_recursively(ctx, child, proc_tree, next_y, proc_h, rect, clip)
+		draw_process_connecting_lines(ctx, x, y, child_x, child_y, proc_h)
+		next_y = next_y + proc_h * proc_tree.num_nodes([child])
+
+	return x, y
+
+
+def draw_process_activity_colors(ctx, proc, proc_tree, x, y, w, proc_h, rect, clip):
+
+	if y > clip[1] + clip[3] or y + proc_h + 2 < clip[1]:
+		return
+
+	draw_fill_rect(ctx, PROC_COLOR_S, (x, y, w, proc_h))
+
+	last_tx = -1
+	for sample in proc.samples :
+		tx = rect[0] + round(((sample.time - proc_tree.start_time) * rect[2] / proc_tree.duration))
+
+		# samples are sorted chronologically
+		if tx < clip[0]:
+			continue
+		if tx > clip[0] + clip[2]:
+			break
+
+		tw = round(proc_tree.sample_period * rect[2] / float(proc_tree.duration))
+		if last_tx != -1 and abs(last_tx - tx) <= tw:
+			tw -= last_tx - tx
+			tx = last_tx
+		tw = max (tw, 1) # nice to see at least something
+
+		last_tx = tx + tw
+		state = get_proc_state( sample.state )
+
+		color = STATE_COLORS[state]
+		if state == STATE_RUNNING:
+			alpha = min (sample.cpu_sample.user + sample.cpu_sample.sys, 1.0)
+			color = tuple(list(PROC_COLOR_R[0:3]) + [alpha])
+#			print "render time %d [ tx %d tw %d ], sample state %s color %s alpha %g" % (sample.time, tx, tw, state, color, alpha)
+		elif state == STATE_SLEEPING:
+			continue
+
+		draw_fill_rect(ctx, color, (tx, y, tw, proc_h))
+
+def draw_process_connecting_lines(ctx, px, py, x, y, proc_h):
+	ctx.set_source_rgba(*DEP_COLOR)
+	ctx.set_dash([2, 2])
+	if abs(px - x) < 3:
+		dep_off_x = 3
+		dep_off_y = proc_h / 4
+		ctx.move_to(x, y + proc_h / 2)
+		ctx.line_to(px - dep_off_x, y + proc_h / 2)
+		ctx.line_to(px - dep_off_x, py - dep_off_y)
+		ctx.line_to(px, py - dep_off_y)
+	else:
+		ctx.move_to(x, y + proc_h / 2)
+		ctx.line_to(px, y + proc_h / 2)
+		ctx.line_to(px, py)
+	ctx.stroke()
+	ctx.set_dash([])
+
+# elide the bootchart collector - it is quite distorting
+def elide_bootchart(proc):
+	return proc.cmd == 'bootchartd' or proc.cmd == 'bootchart-colle'
+
+class CumlSample:
+	def __init__(self, proc):
+		self.cmd = proc.cmd
+		self.samples = []
+		self.merge_samples (proc)
+		self.color = None
+
+	def merge_samples(self, proc):
+		self.samples.extend (proc.samples)
+		self.samples.sort (key = lambda p: p.time)
+
+	def next(self):
+		global palette_idx
+		palette_idx += HSV_STEP
+		return palette_idx
+
+	def get_color(self):
+		if self.color is None:
+			i = self.next() % HSV_MAX_MOD
+			h = 0.0
+			if i is not 0:
+				h = (1.0 * i) / HSV_MAX_MOD
+			s = 0.5
+			v = 1.0
+			c = colorsys.hsv_to_rgb (h, s, v)
+			self.color = (c[0], c[1], c[2], 1.0)
+		return self.color
+
+
+def draw_cuml_graph(ctx, proc_tree, chart_bounds, duration, sec_w, stat_type):
+	global palette_idx
+	palette_idx = 0
+
+	time_hash = {}
+	total_time = 0.0
+	m_proc_list = {}
+
+	if stat_type is STAT_TYPE_CPU:
+		sample_value = 'cpu'
+	else:
+		sample_value = 'io'
+	for proc in proc_tree.process_list:
+		if elide_bootchart(proc):
+			continue
+
+		for sample in proc.samples:
+			total_time += getattr(sample.cpu_sample, sample_value)
+			if not sample.time in time_hash:
+				time_hash[sample.time] = 1
+
+		# merge pids with the same cmd
+		if not proc.cmd in m_proc_list:
+			m_proc_list[proc.cmd] = CumlSample (proc)
+			continue
+		s = m_proc_list[proc.cmd]
+		s.merge_samples (proc)
+
+	# all the sample times
+	times = sorted(time_hash)
+	if len (times) < 2:
+		print("degenerate boot chart")
+		return
+
+	pix_per_ns = chart_bounds[3] / total_time
+#	print "total time: %g pix-per-ns %g" % (total_time, pix_per_ns)
+
+	# FIXME: we have duplicates in the process list too [!] - why !?
+
+	# Render bottom up, left to right
+	below = {}
+	for time in times:
+		below[time] = chart_bounds[1] + chart_bounds[3]
+
+	# same colors each time we render
+	random.seed (0)
+
+	ctx.set_line_width(1)
+
+	legends = []
+	labels = []
+
+	# render each pid in order
+	for cs in m_proc_list.values():
+		row = {}
+		cuml = 0.0
+
+		# print "pid : %s -> %g samples %d" % (proc.cmd, cuml, len (cs.samples))
+		for sample in cs.samples:
+			cuml += getattr(sample.cpu_sample, sample_value)
+			row[sample.time] = cuml
+
+		process_total_time = cuml
+
+		# hide really tiny processes
+		if cuml * pix_per_ns <= 2:
+			continue
+
+		last_time = times[0]
+		y = last_below = below[last_time]
+		last_cuml = cuml = 0.0
+
+		ctx.set_source_rgba(*cs.get_color())
+		for time in times:
+			render_seg = False
+
+			# did the underlying trend increase ?
+			if below[time] != last_below:
+				last_below = below[last_time]
+				last_cuml = cuml
+				render_seg = True
+
+			# did we move up a pixel increase ?
+			if time in row:
+				nc = round (row[time] * pix_per_ns)
+				if nc != cuml:
+					last_cuml = cuml
+					cuml = nc
+					render_seg = True
+
+#			if last_cuml > cuml:
+#				assert fail ... - un-sorted process samples
+
+			# draw the trailing rectangle from the last time to
+			# before now, at the height of the last segment.
+			if render_seg:
+				w = math.ceil ((time - last_time) * chart_bounds[2] / proc_tree.duration) + 1
+				x = chart_bounds[0] + round((last_time - proc_tree.start_time) * chart_bounds[2] / proc_tree.duration)
+				ctx.rectangle (x, below[last_time] - last_cuml, w, last_cuml)
+				ctx.fill()
+#				ctx.stroke()
+				last_time = time
+				y = below [time] - cuml
+
+			row[time] = y
+
+		# render the last segment
+		x = chart_bounds[0] + round((last_time - proc_tree.start_time) * chart_bounds[2] / proc_tree.duration)
+		y = below[last_time] - cuml
+		ctx.rectangle (x, y, chart_bounds[2] - x, cuml)
+		ctx.fill()
+#		ctx.stroke()
+
+		# render legend if it will fit
+		if cuml > 8:
+			label = cs.cmd
+			extnts = ctx.text_extents(label)
+			label_w = extnts[2]
+			label_h = extnts[3]
+#			print "Text extents %g by %g" % (label_w, label_h)
+			labels.append((label,
+				       chart_bounds[0] + chart_bounds[2] - label_w - off_x * 2,
+				       y + (cuml + label_h) / 2))
+			if cs in legends:
+				print("ARGH - duplicate process in list !")
+
+		legends.append ((cs, process_total_time))
+
+		below = row
+
+	# render grid-lines over the top
+	draw_box_ticks(ctx, chart_bounds, sec_w)
+
+	# render labels
+	for l in labels:
+		draw_text(ctx, l[0], TEXT_COLOR, l[1], l[2])
+
+	# Render legends
+	font_height = 20
+	label_width = 300
+	LEGENDS_PER_COL = 15
+	LEGENDS_TOTAL = 45
+	ctx.set_font_size (TITLE_FONT_SIZE)
+	dur_secs = duration / 100
+	cpu_secs = total_time / 1000000000
+
+	# misleading - with multiple CPUs ...
+#	idle = ((dur_secs - cpu_secs) / dur_secs) * 100.0
+	if stat_type is STAT_TYPE_CPU:
+		label = "Cumulative CPU usage, by process; total CPU: " \
+			" %.5g(s) time: %.3g(s)" % (cpu_secs, dur_secs)
+	else:
+		label = "Cumulative I/O usage, by process; total I/O: " \
+			" %.5g(s) time: %.3g(s)" % (cpu_secs, dur_secs)
+
+	draw_text(ctx, label, TEXT_COLOR, chart_bounds[0] + off_x,
+		  chart_bounds[1] + font_height)
+
+	i = 0
+	legends = sorted(legends, key=itemgetter(1), reverse=True)
+	ctx.set_font_size(TEXT_FONT_SIZE)
+	for t in legends:
+		cs = t[0]
+		time = t[1]
+		x = chart_bounds[0] + off_x + int (i/LEGENDS_PER_COL) * label_width
+		y = chart_bounds[1] + font_height * ((i % LEGENDS_PER_COL) + 2)
+		str = "%s - %.0f(ms) (%2.2f%%)" % (cs.cmd, time/1000000, (time/total_time) * 100.0)
+		draw_legend_box(ctx, str, cs.color, x, y, leg_s)
+		i = i + 1
+		if i >= LEGENDS_TOTAL:
+			break