def on_file_quit_activate(self, menuitem):
if self.current_iter is not None:
chunk = self.current_view.save_chunk()
if chunk: self.store.set_value(self.current_iter, 1, chunk)
chunks = []
self.store.foreach(lambda model, path, iter: chunks.append(model.get_value(iter, 1)))
Png(chunks).write(file("test.png", "wb"))
gtk.main_quit()
def __init__(self):
glade = gtk.glade.XML("png-browser.glade")
glade.signal_autoconnect(self)
self.window = glade.get_widget("window")
self.pane = glade.get_widget("pane")
self.statusbar = glade.get_widget("statusbar")
self.status_context_chunk = self.statusbar.get_context_id("Chunk Details")
self.chunkview = glade.get_widget("chunkview")
self.chunkview.append_column(gtk.TreeViewColumn("Chunk", gtk.CellRendererText(), text=0))
self.store = gtk.ListStore(gobject.TYPE_STRING, gobject.TYPE_PYOBJECT)
self.chunkview.set_model(self.store)
self.chunkview.get_selection().connect('changed', self.chunkview_selection_cb)
self.current_iter = None
self.current_view = None
png = Png.open(file(sys.argv[1], "rb"))
for c in png.chunks:
i = self.store.append()
self.store.set(i, 0, c.type, 1, c)
self.show_chunk_page(None)
self.window.show_all()
#! /usr/bin/python
if __name__ == "__main__":
import sys
from PNG import Png
png = Png.open(file(sys.argv[1], "rb"))
png.write(file(sys.argv[2], "wb"))
# Do the scale
thumb = pixbuf.scale_simple(target_width, target_height, gdk.INTERP_HYPER)
# Now transform thumb into a valid PNG file
# A little hacky, but it works. :(
THUMB_FILENAME = "/tmp/temp-thumb.png"
thumb.save(THUMB_FILENAME, "png")
thumb = ""
for line in file(THUMB_FILENAME, 'rb'):
thumb = thumb + line
# End of nasty evil foul hack
# Insert the PNG as a sub-image into the original
from PNG import Png, Chunk
f = open(sys.argv[1], 'rb')
png = Png.open(f)
f.close()
# Kill existing thumbnail
[png.chunks.remove(c) for c in png.chunks if c.type == THUMBNAIL_CHUNK]
# Add a new one
c = Chunk(THUMBNAIL_CHUNK, thumb)
# Insert this chunk at the beginning, after the IHDR and probably after the RDF.
png.chunks.insert(1, c)
f = file(sys.argv[1], 'wb')
png.write(f)
f.close()
#! /usr/bin/python
if __name__ == "__main__":
import sys
from PNG import Png, tEXt
if len(sys.argv) != 3:
print "Syntax: png-get-text filename.png key"
sys.exit(1)
(filename, key) = sys.argv[1:]
f = file(filename, 'rb')
png = Png.open(f)
f.close()
print "\n".join([c.content for c in png.get_chunks(tEXt) if c.keyword == key])
