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
|
#!/usr/bin/env python
# This program is a mapping of the color.c program
# written by Naofumi. It should provide a good test case for the
# relevant PyGtkGLExt classes and functions.
#
# Alif Wahid.
import sys
import pygtk
pygtk.require('2.0')
import gtk
import gtk.gtkgl
from OpenGL.GL import *
from OpenGL.GLU import *
class ColorManagementDemo(object):
def __init__(self):
# Check for whether to set rgb mode
# or color index mode.
if '--rgb' in sys.argv:
self.display_mode = gtk.gdkgl.MODE_RGB
else:
self.display_mode = gtk.gdkgl.MODE_INDEX
# Query the OpenGL extension version.
print "OpenGL extension version - %d.%d\n" % gtk.gdkgl.query_version()
# Try to create a double buffered framebuffer,
# if not successful then create a single
# buffered one.
self.display_mode |= gtk.gdkgl.MODE_DOUBLE
try:
self.glconfig = gtk.gdkgl.Config(mode=self.display_mode)
except gtk.gdkgl.NoMatches:
self.display_mode &= ~gtk.gdkgl.MODE_DOUBLE
self.glconfig = gtk.gdkgl.Config(mode=self.display_mode)
if not self.glconfig.is_rgba():
# Try to allocate non-writeable and perfect match colours.
try:
colormap = self.glconfig.get_colormap()
self.BLACK = colormap.alloc_color(0x0, 0x0, 0x0, False, False)
self.RED = colormap.alloc_color(0xffff, 0x0, 0x0, False, False)
# Raise this dummy exception for testing to
# see if switching to RGB mode occurs
# properly. Currently commented out, but
# uncomment if necessary for testing.
#
#raise RuntimeError
self.GREEN = colormap.alloc_color(0x0, 0xffff, 0x0, False, False)
self.BLUE = colormap.alloc_color(0x0, 0x0, 0xffff, False, False)
self.render_type = gtk.gdkgl.COLOR_INDEX_TYPE
except RuntimeError:
print 'Could not allocate colours in Index mode.'
print 'Switching to RGB mode.'
self.display_mode &= ~gtk.gdkgl.MODE_INDEX # Clear the Index mode flag.
self.display_mode |= gtk.gdkgl.MODE_RGB # Set the RGB mode flag.
self.glconfig = gtk.gdkgl.Config(mode=self.display_mode)
self.__create_Color_objects()
else:
# Directly corresponding gdk.Color objects.
self.__create_Color_objects()
# Create the window for the app.
self.win = gtk.Window()
self.win.set_title('color')
if sys.platform != 'win32':
self.win.set_resize_mode(gtk.RESIZE_IMMEDIATE)
self.win.set_reallocate_redraws(True)
self.win.connect('destroy', lambda quit: gtk.main_quit())
# VBox to hold everything.
vbox = gtk.VBox()
self.win.add(vbox)
vbox.show()
# DrawingArea for OpenGL rendering.
glarea = gtk.gtkgl.DrawingArea(glconfig=self.glconfig,
render_type=self.render_type)
glarea.set_size_request(200, 200)
glarea.connect_after('realize', self.__realize)
glarea.connect('configure_event', self.__configure_event)
glarea.connect('expose_event', self.__expose_event)
vbox.pack_start(glarea)
glarea.show()
# A quit button.
button = gtk.Button('Quit')
button.connect('clicked', lambda quit: self.win.destroy())
vbox.pack_start(button, expand=False)
button.show()
def __create_Color_objects (self):
# Directly corresponding gdk.Color objects.
self.BLACK = gtk.gdk.Color(0x0, 0x0, 0x0)
self.RED = gtk.gdk.Color(0xffff, 0x0, 0x0)
self.GREEN = gtk.gdk.Color(0x0, 0xffff, 0x0)
self.BLUE = gtk.gdk.Color(0x0, 0x0, 0xffff)
self.render_type = gtk.gdkgl.RGBA_TYPE
def __realize(self, widget):
# Get GLContext and GLDrawable
glcontext = widget.get_gl_context()
gldrawable = widget.get_gl_drawable()
# OpenGL begin.
if not gldrawable.gl_begin(glcontext): return
glClearColor(0.0, 0.0, 0.0, 0.0)
# OpenGL end
gldrawable.gl_end()
def __configure_event(self, widget, event):
# Get GLContext and GLDrawable
glcontext = widget.get_gl_context()
gldrawable = widget.get_gl_drawable()
# GL calls
if not gldrawable.gl_begin(glcontext): return
# OpenGL begin.
glViewport(0, 0, widget.allocation.width, widget.allocation.height)
# OpenGL end
gldrawable.gl_end()
return True
def __expose_event(self, widget, event):
# Get GLContext and GLDrawable
glcontext = widget.get_gl_context()
gldrawable = widget.get_gl_drawable()
# GL calls
if not gldrawable.gl_begin(glcontext): return
# OpenGL begin.
glClear(GL_COLOR_BUFFER_BIT)
glBegin(GL_TRIANGLES)
glIndexi(self.RED.pixel)
glColor3f(1.0, 0.0, 0.0)
glVertex2i(0, 1)
glIndexi(self.GREEN.pixel)
glColor3f(0.0, 1.0, 0.0)
glVertex2i(-1, -1)
glIndexi(self.BLUE.pixel)
glColor3f(0.0, 0.0, 1.0)
glVertex2i(1, -1)
glEnd()
if gldrawable.is_double_buffered():
gldrawable.swap_buffers()
else:
glFlush()
# OpenGL end
gldrawable.gl_end()
return True
def run(self):
self.win.show()
gtk.main()
if __name__ == '__main__':
app = ColorManagementDemo()
app.run()
|
