1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
#
# The Python Imaging Library.
# $Id: ImageWin.py 2662 2006-03-21 22:41:02Z fredrik $
#
# a Windows DIB display interface
#
# History:
# 1996-05-20 fl Created
# 1996-09-20 fl Fixed subregion exposure
# 1997-09-21 fl Added draw primitive (for tzPrint)
# 2003-05-21 fl Added experimental Window/ImageWindow classes
# 2003-09-05 fl Added fromstring/tostring methods
#
# Copyright (c) Secret Labs AB 1997-2003.
# Copyright (c) Fredrik Lundh 1996-2003.
#
# See the README file for information on usage and redistribution.
#
import Image
##
# The <b>ImageWin</b> module contains support to create and display
# images under Windows 95/98, NT, 2000 and later.
class HDC:
def __init__(self, dc):
self.dc = dc
def __int__(self):
return self.dc
class HWND:
def __init__(self, wnd):
self.wnd = wnd
def __int__(self):
return self.wnd
##
# Create a Windows bitmap with the given mode and size. The mode can
# be one of "1", "L", "P", or "RGB".
#
# If the display requires a palette, this constructor creates a
# suitable palette and associates it with the image. For an "L" image,
# 128 greylevels are allocated. For an "RGB" image, a 6x6x6 colour
# cube is used, together with 20 greylevels.
#
# To make sure that palettes work properly under Windows, you must
# call the <b>palette</b> method upon certain events from Windows.
class Dib:
##
# Create Windows bitmap.
#
# @param image Either a PIL image, or a mode string. If a
# mode string is used, a size must also be given. The
# mode can be one of "1", "L", "P", or "RGB".
# @param size If the first argument is a mode string, this
# defines the size of the image.
def __init__(self, image, size=None):
if hasattr(image, "mode") and hasattr(image, "size"):
mode = image.mode
size = image.size
else:
mode = image
image = None
if mode not in ["1", "L", "P", "RGB"]:
mode = Image.getmodebase(mode)
self.image = Image.core.display(mode, size)
self.mode = mode
self.size = size
if image:
self.paste(image)
##
# Copy the bitmap contents to a device context.
#
# @param handle Device context (HDC), cast to a Python integer,
# or a HDC or HWND instance. In PythonWin, you can use the
# <b>GetHandleAttrib</b> method of the <b>CDC</b> class to get
# a suitable handle.
def expose(self, handle):
if isinstance(handle, HWND):
dc = self.image.getdc(handle)
try:
result = self.image.expose(dc)
finally:
self.image.releasedc(handle, dc)
else:
result = self.image.expose(handle)
return result
def draw(self, handle, dst, src=None):
if not src:
src = (0,0) + self.size
if isinstance(handle, HWND):
dc = self.image.getdc(handle)
try:
result = self.image.draw(dc, dst, src)
finally:
self.image.releasedc(handle, dc)
else:
result = self.image.draw(handle, dst, src)
return result
##
# Installs the palette associated with the image in the
# given device context.
# <p>
# This method should be called upon <b>QUERYNEWPALETTE</b>
# and <b>PALETTECHANGED</b> events from Windows. If this
# method returns a non-zero value, one or more display
# palette entries were changed, and the image should be
# redrawn.
#
# @param handle Device context (HDC), cast to a Python integer,
# or an HDC or HWND instance.
# @return A true value if one or more entries were changed
# (this indicates that the image should be redrawn).
def query_palette(self, handle):
if isinstance(handle, HWND):
handle = self.image.getdc(handle)
try:
result = self.image.query_palette(handle)
finally:
self.image.releasedc(handle, handle)
else:
result = self.image.query_palette(handle)
return result
##
# Paste a PIL image into the bitmap image.
#
# @param im A PIL image. The size must match the target region.
# If the mode does not match, the image is converted to the
# mode of the bitmap image.
# @param box A 4-tuple defining the left, upper, right, and
# lower pixel coordinate. If None is given instead of a
# tuple, all of the image is assumed.
def paste(self, im, box=None):
im.load()
if self.mode != im.mode:
im = im.convert(self.mode)
if box:
self.image.paste(im.im, box)
else:
self.image.paste(im.im)
##
# Load display memory contents from string buffer.
#
# @param buffer A string buffer containing display data (usually
# data returned from <b>tostring</b>)
def fromstring(self, buffer):
return self.image.fromstring(buffer)
##
# Copy display memory contents to string buffer.
#
# @return A string buffer containing display data.
def tostring(self):
return self.image.tostring()
##
# Create a Window with the given title size.
class Window:
def __init__(self, title="PIL", width=None, height=None):
self.hwnd = Image.core.createwindow(
title, self.__dispatcher, width or 0, height or 0
)
def __dispatcher(self, action, *args):
return apply(getattr(self, "ui_handle_" + action), args)
def ui_handle_clear(self, dc, x0, y0, x1, y1):
pass
def ui_handle_damage(self, x0, y0, x1, y1):
pass
def ui_handle_destroy(self):
pass
def ui_handle_repair(self, dc, x0, y0, x1, y1):
pass
def ui_handle_resize(self, width, height):
pass
def mainloop(self):
Image.core.eventloop()
##
# Create an image window which displays the given image.
class ImageWindow(Window):
def __init__(self, image, title="PIL"):
if not isinstance(image, Dib):
image = Dib(image)
self.image = image
width, height = image.size
Window.__init__(self, title, width=width, height=height)
def ui_handle_repair(self, dc, x0, y0, x1, y1):
self.image.draw(dc, (x0, y0, x1, y1))
|