这就是我在 PyGtk 中的做法,也许这仍然有效(我在 pygi-convert'ed 之后复制代码):
import Image
import StringIO
from gi.repository import GdkPixbuf
def thumbnail_image(self, image):
"""Creates a thumbnail GdkPixbuf of given image"""
# Create thumbnail
img = Image.open(image)
img.thumbnail((200, 300), Image.ANTIALIAS)
# Convert to GdkPixbuf
if img.mode != 'RGB': # Fix IOError: cannot write mode P as PPM
img = img.convert('RGB')
buff = StringIO.StringIO()
img.save(buff, 'ppm')
contents = buff.getvalue()
buff.close()
loader = GdkPixbuf.PixbufLoader('pnm')
loader.write(contents, len(contents))
pixbuf = loader.get_pixbuf()
loader.close()
return pixbuf
亲切的问候
编辑:好的,这似乎正在工作......我只是非常讨厌 PyGObject 糟糕的 C 移植 API(直到现在......)。
代码(test.py):
import Image
import StringIO
from gi.repository import Gtk, GdkPixbuf
from os.path import abspath, dirname, join
WHERE_AM_I = abspath(dirname(__file__))
class MyApp(object):
def __init__(self):
# Build GUI
self.builder = Gtk.Builder()
self.glade_file = join(WHERE_AM_I, 'test.glade')
self.builder.add_from_file(self.glade_file)
# Get objects
go = self.builder.get_object
self.window = go('window')
self.image = go('image')
# Load image
path = join(WHERE_AM_I, 'logo.png')
thumbnail = self.thumbnail_image(path)
self.image.set_from_pixbuf(thumbnail)
# Connect signals
self.builder.connect_signals(self)
# Everything is ready
self.window.show()
def main_quit(self, widget):
Gtk.main_quit()
def thumbnail_image(self, image):
"""Creates a thumbnail GdkPixbuf of given image"""
# Create thumbnail
img = Image.open(image)
img.thumbnail((200, 300), Image.ANTIALIAS)
# Convert to GdkPixbuf
if img.mode != 'RGB': # Fix IOError: cannot write mode P as PPM
img = img.convert('RGB')
buff = StringIO.StringIO()
img.save(buff, 'ppm')
contents = buff.getvalue()
buff.close()
loader = GdkPixbuf.PixbufLoader.new_with_type('pnm')
loader.write(contents)
pixbuf = loader.get_pixbuf()
loader.close()
return pixbuf
if __name__ == '__main__':
gui = MyApp()
Gtk.main()
林间空地文件(test.glade):
<?xml version="1.0" encoding="UTF-8"?>
<interface>
<!-- interface-requires gtk+ 3.0 -->
<object class="GtkWindow" id="window">
<property name="can_focus">False</property>
<property name="window_position">center-always</property>
<property name="default_width">300</property>
<property name="default_height">200</property>
<signal name="destroy" handler="main_quit" swapped="no"/>
<child>
<object class="GtkImage" id="image">
<property name="visible">True</property>
<property name="can_focus">False</property>
</object>
</child>
</object>
</interface>
它看起来像什么:
(欢迎改进以添加 Alpha 通道支持)
亲切的问候