def create_preview(self, object_id, col, id):
jobject = datastore.get(object_id)
if jobject.metadata.has_key('preview'):
preview = jobject.metadata['preview']
if preview is None or preview == '' or preview == 'None':
if (jobject.metadata['mime_type'].startswith('image/')):
# or (jobject.metadata['mime_type'].startswith('video')):
filename = jobject.get_file_path()
self.show_image(filename, col, id)
return
if jobject.metadata.has_key('preview') and \
len(jobject.metadata['preview']) > 4:
if jobject.metadata['preview'][1:4] == 'PNG':
preview_data = jobject.metadata['preview']
else:
import base64
preview_data = base64.b64decode(jobject.metadata['preview'])
loader = Gdk.PixbufLoader()
loader.write(preview_data)
scaled_buf = loader.get_pixbuf()
loader.close()
self.image[col][id].set_from_pixbuf(scaled_buf)
self.image[col][id].show()
else:
self.image[col][id].clear()
self.image[col][id].show()
def surface_to_pixbuf(surface):
try:
file1 = StringIO()
surface.write_to_png(file1)
contents = file1.getvalue()
finally:
file1.close()
loader = gdk.PixbufLoader("png")
loader.write(contents, len(contents))
pixbuf = loader.get_pixbuf()
loader.close()
return pixbuf
def image_to_pixbuf(im, type="ppm"):
p_type = type
if type == "ppm":
p_type = "pnm"
file1 = StringIO()
try:
im.save(file1, type)
contents = file1.getvalue()
finally:
file1.close()
loader = gdk.PixbufLoader(p_type)
loader.write(contents, len(contents))
pixbuf = loader.get_pixbuf()
loader.close()
return pixbuf
