On Mon, Sep 25, 2017 at 1:59 AM, Jethram Cockson <jethram.cock...@gmail.com> wrote: > Hi group, > > I'm having issues with gdk-pixbuf loader and JPEGs on my Windows 10 > system with MSYS. The > loader works okay to construct pixbufs. But for some reason, it > refuses to emit area-updated and > area-prepared until the jpeg is 100% loaded already. That kind of > defeats the purpose of that > feature. On Linux, it successfully emits these signals with the same jpeg > files. > > I'm wondering, is there any trick to getting this to work on Windows > that I'm missing, or is this just > expected behavior? Or maybe a bug? > > > On MSYS(using the pacman packages for these): > $ pkg-config --modversion gdk-pixbuf-2.0 > 2.36.10 > $ pkg-config --modversion gtk+-3.0 > 3.22.19 > > On Linux: > $ uname -a > $ pkg-config --modversion gdk-pixbuf-2.0 > 2.36.9 > $ pkg-config --modversion gtk+-3.0 > 3.22.21 > > I've made a small test script in Python that demos this problem: > https://gist.github.com/anonymous/95424447867e1d6a99e32f3622a06565 > > import gi > gi.require_version('GdkPixbuf', '2.0') > from gi.repository import GdkPixbuf > from urllib import request > import sys > > pbl = GdkPixbuf.PixbufLoader() > url = sys.argv[1] > > def prepped(*args): > pb: GdkPixbuf.Pixbuf = pbl.get_pixbuf() > print('prepped', pb, pb.get_width(), 'x', pb.get_height()) > > def updated(*args): > print('updated', *args) > > pbl.connect('area-prepared', prepped) > pbl.connect('area-updated', updated) > > with request.urlopen(url) as fp: > while True: > buf = fp.read(1024) > if not buf: > break > pbl.write(buf) > pbl.close() > > pb: GdkPixbuf.Pixbuf = pbl.get_pixbuf() > print('pixbuf', pb, pb.get_width(), 'x', pb.get_height()) > > > Notice on MSYS it only emits area-updated when its fully loaded. > MSYS: > $python3 pbl.py https://upload.wikimedia.org/wikipedia/en/5/58/Penny_test.jpg > prepped <GdkPixbuf.Pixbuf object at 0x000000000372e438 (GdkPixbuf at > 0x0000000002d41600)> 198 x 238 > updated <GdkPixbuf.PixbufLoader object at 0x0000000003147ea0 > (GdkPixbufLoader at 0x0000000002d431e0)> 0 0 198 238 > pixbuf <GdkPixbuf.Pixbuf object at 0x000000000372e438 (GdkPixbuf at > 0x0000000002d41600)> 198 x 238 > > > On Linux: > $ python3 pbl.py https://upload.wikimedia.org/wikipedia/en/5/58/Penny_test.jpg > prepped <GdkPixbuf.Pixbuf object at 0x7f89db837bd0 (GdkPixbuf at > 0x56545f04f460)> 198 x 238 > updated <GdkPixbuf.PixbufLoader object at 0x7f89debd1480 > (GdkPixbufLoader at 0x56545f05fcc0)> 0 0 198 1 > updated <GdkPixbuf.PixbufLoader object at 0x7f89debd1480 > (GdkPixbufLoader at 0x56545f05fcc0)> 0 1 198 1 > updated <GdkPixbuf.PixbufLoader object at 0x7f89debd1480 > (GdkPixbufLoader at 0x56545f05fcc0)> 0 2 198 1 > updated <GdkPixbuf.PixbufLoader object at 0x7f89debd1480 > (GdkPixbufLoader at 0x56545f05fcc0)> 0 3 198 1 > updated <GdkPixbuf.PixbufLoader object at 0x7f89debd1480 > (GdkPixbufLoader at 0x56545f05fcc0)> 0 4 198 1 > updated <GdkPixbuf.PixbufLoader object at 0x7f89debd1480 > (GdkPixbufLoader at 0x56545f05fcc0)> 0 5 198 1 > > <a few hundred scanlines snipped for brevity> > > updated <GdkPixbuf.PixbufLoader object at 0x7f89debd1480 > (GdkPixbufLoader at 0x56545f05fcc0)> 0 232 198 1 > updated <GdkPixbuf.PixbufLoader object at 0x7f89debd1480 > (GdkPixbufLoader at 0x56545f05fcc0)> 0 233 198 1 > updated <GdkPixbuf.PixbufLoader object at 0x7f89debd1480 > (GdkPixbufLoader at 0x56545f05fcc0)> 0 234 198 1 > updated <GdkPixbuf.PixbufLoader object at 0x7f89debd1480 > (GdkPixbufLoader at 0x56545f05fcc0)> 0 235 198 1 > updated <GdkPixbuf.PixbufLoader object at 0x7f89debd1480 > (GdkPixbufLoader at 0x56545f05fcc0)> 0 236 198 1 > updated <GdkPixbuf.PixbufLoader object at 0x7f89debd1480 > (GdkPixbufLoader at 0x56545f05fcc0)> 0 237 198 1 > pixbuf <GdkPixbuf.Pixbuf object at 0x7f89dd080480 (GdkPixbuf at > 0x56545f04f460)> 198 x 238
Realized there was a stray type annotation in the script. Removed in case it causes problems: https://gist.github.com/anonymous/592658623d5317e7db40164e4d75b95c import gi gi.require_version('GdkPixbuf', '2.0') from gi.repository import GdkPixbuf from urllib import request import sys pbl = GdkPixbuf.PixbufLoader() url = sys.argv[1] def prepped(*args): pb: GdkPixbuf.Pixbuf = pbl.get_pixbuf() print('prepped', pb, pb.get_width(), 'x', pb.get_height()) def updated(*args): print('updated', *args) pbl.connect('area-prepared', prepped) pbl.connect('area-updated', updated) with request.urlopen(url) as fp: while True: buf = fp.read(1024) if not buf: break pbl.write(buf) pbl.close() pb = pbl.get_pixbuf() print('pixbuf', pb, pb.get_width(), 'x', pb.get_height()) _______________________________________________ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
