Re: GtkPixbuf from Char buffer
This looks like what we need. Thanks.
Kemal Hadimli wrote:
From Maemopad+
(https://garage.maemo.org/plugins/scmsvn/viewcvs.php/trunk/unified/src/ui/callbacks.c?revision=94root=maemopadplusview=markup
)
GdkPixbufLoader *pl = gdk_pixbuf_loader_new_with_type(png, NULL);
GError *err = NULL;
gdk_pixbuf_loader_write(pl, (guchar *) blob, blobsize, err);
f (err != NULL)
{
//error
g_error_free(err);
return;
}
gdk_pixbuf_loader_close(pl, NULL);
GdkPixbuf *pixbuf = gdk_pixbuf_loader_get_pixbuf(pl);
if (GDK_IS_PIXBUF(pixbuf))
{
//do stuff
}
g_object_unref(pl);
--
Arto Karppinen
--
[EMAIL PROTECTED]
___
maemo-developers mailing list
maemo-developers@maemo.org
https://lists.maemo.org/mailman/listinfo/maemo-developers
GtkPixbuf from Char buffer
Hi, were developing an application which is supposed to show user images downloaded from web server using xmlrpc. The problem is that we cant quite figure out how to create a pixbuf from a buffer which contains the RAW contents of a file. Functions like: gdk_pixbuf_new_from_data gdk_pixbuf_new_from_inline gdk_pixbuf_from_pixdata all seem to expect the image to be in some particular format already, while what we need is more like gdk_pixbuf_new_from_file() which is able to autodetect everything and just read the file. All information that our application has about the image are: - Name of file. - Size of file. - Contents of file. -- Arto Karppinen -- [EMAIL PROTECTED] ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
Re: GtkPixbuf from Char buffer
arto, have you considered caching the downloaded file to disk and reading from there using the standard function? This would give you the obvious benefit of allowing offline usage and faster requerying. There isn't an infinite amount of memory available and having to download images everytime could cause user angst. I believe /tmp is mapped to real memory and not the flash drive, so would not cause real problems and wouldn't be much slower (someone can confirm this?) Even though it may require a little bit more time to organise a cache file plan, it may be worth it in the end? Gary (lcuk on #maemo) On Thu, Oct 16, 2008 at 3:12 PM, Arto Karppinen [EMAIL PROTECTED] wrote: Hi, were developing an application which is supposed to show user images downloaded from web server using xmlrpc. The problem is that we cant quite figure out how to create a pixbuf from a buffer which contains the RAW contents of a file. Functions like: gdk_pixbuf_new_from_data gdk_pixbuf_new_from_inline gdk_pixbuf_from_pixdata all seem to expect the image to be in some particular format already, while what we need is more like gdk_pixbuf_new_from_file() which is able to autodetect everything and just read the file. All information that our application has about the image are: - Name of file. - Size of file. - Contents of file. -- Arto Karppinen -- [EMAIL PROTECTED] ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
Re: GtkPixbuf from Char buffer
Hello! One way is to create GdkPixbufLoader and feed your image with gdk_pixbuf_loader_write. It will parse it and give you GdkPixbuf. Another way is to save data into temporary file and do gdk_pixbuf_new_from_file (). Thanks, Daniil. On Thu, Oct 16, 2008 at 5:12 PM, Arto Karppinen [EMAIL PROTECTED] wrote: Hi, were developing an application which is supposed to show user images downloaded from web server using xmlrpc. The problem is that we cant quite figure out how to create a pixbuf from a buffer which contains the RAW contents of a file. Functions like: gdk_pixbuf_new_from_data gdk_pixbuf_new_from_inline gdk_pixbuf_from_pixdata all seem to expect the image to be in some particular format already, while what we need is more like gdk_pixbuf_new_from_file() which is able to autodetect everything and just read the file. All information that our application has about the image are: - Name of file. - Size of file. - Contents of file. -- Arto Karppinen -- [EMAIL PROTECTED] ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
Re: GtkPixbuf from Char buffer
Hi, ext gary liquid wrote: have you considered caching the downloaded file to disk and reading from there using the standard function? This would give you the obvious benefit of allowing offline usage and faster requerying. There isn't an infinite amount of memory available and having to download images everytime could cause user angst. I believe /tmp is mapped to real memory and not the flash drive, so would not cause real problems and wouldn't be much slower (someone can confirm this?) This is a no-no. The system /tmp is a RAM-disk with 1/2MB max size and it's used by all applications. It's intended for _small_ (few KB) temporary files. For larger or more permanent[1] things one should use $TMPDIR i.e. /var/tmp which is on Flash. [1] See the Filesystem Hierarchy Standard: http://www.pathname.com/fhs/ Even though it may require a little bit more time to organise a cache file plan, it may be worth it in the end? - Eero ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
Re: GtkPixbuf from Char buffer
i don't mind being wrong :) thanks Eero, it was the principle more than the specifics I was trying to indicate however. On Thu, Oct 16, 2008 at 3:46 PM, Eero Tamminen [EMAIL PROTECTED]wrote: Hi, ext gary liquid wrote: have you considered caching the downloaded file to disk and reading from there using the standard function? This would give you the obvious benefit of allowing offline usage and faster requerying. There isn't an infinite amount of memory available and having to download images everytime could cause user angst. I believe /tmp is mapped to real memory and not the flash drive, so would not cause real problems and wouldn't be much slower (someone can confirm this?) This is a no-no. The system /tmp is a RAM-disk with 1/2MB max size and it's used by all applications. It's intended for _small_ (few KB) temporary files. For larger or more permanent[1] things one should use $TMPDIR i.e. /var/tmp which is on Flash. [1] See the Filesystem Hierarchy Standard: http://www.pathname.com/fhs/ Even though it may require a little bit more time to organise a cache file plan, it may be worth it in the end? - Eero ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
Re: GtkPixbuf from Char buffer
From Maemopad+
(https://garage.maemo.org/plugins/scmsvn/viewcvs.php/trunk/unified/src/ui/callbacks.c?revision=94root=maemopadplusview=markup
)
GdkPixbufLoader *pl = gdk_pixbuf_loader_new_with_type(png, NULL);
GError *err = NULL;
gdk_pixbuf_loader_write(pl, (guchar *) blob, blobsize, err);
f (err != NULL)
{
//error
g_error_free(err);
return;
}
gdk_pixbuf_loader_close(pl, NULL);
GdkPixbuf *pixbuf = gdk_pixbuf_loader_get_pixbuf(pl);
if (GDK_IS_PIXBUF(pixbuf))
{
//do stuff
}
g_object_unref(pl);
On Thu, Oct 16, 2008 at 5:12 PM, Arto Karppinen
[EMAIL PROTECTED] wrote:
Hi, were developing an application which is supposed to show user images
downloaded from web server using xmlrpc. The problem is that we cant
quite figure out how to create a pixbuf from a buffer which contains the
RAW contents of a file.
Functions like:
gdk_pixbuf_new_from_data
gdk_pixbuf_new_from_inline
gdk_pixbuf_from_pixdata
all seem to expect the image to be in some particular format already,
while what we need is more like gdk_pixbuf_new_from_file() which is able
to autodetect everything and just read the file.
All information that our application has about the image are:
- Name of file.
- Size of file.
- Contents of file.
--
Arto Karppinen
--
[EMAIL PROTECTED]
___
maemo-developers mailing list
maemo-developers@maemo.org
https://lists.maemo.org/mailman/listinfo/maemo-developers
--
Kemal
___
maemo-developers mailing list
maemo-developers@maemo.org
https://lists.maemo.org/mailman/listinfo/maemo-developers
Re: GtkPixbuf from Char buffer
gary liquid wrote: arto, have you considered caching the downloaded file to disk and reading from there using the standard function? This would give you the obvious benefit of allowing offline usage and faster requerying. There isn't an infinite amount of memory available and having to download images everytime could cause user angst. This is about a small preview image for the complete Irreco Theme, so i don't feel there is any real need to cache it. The theme will be saved to disk if the user likes the preview, and chooses do download the whole thing. -- Arto Karppinen -- [EMAIL PROTECTED] ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
Re: GtkPixbuf from Char buffer
On Thu, Oct 16, 2008 at 05:12:40PM +0300, Arto Karppinen wrote: Hi, were developing an application which is supposed to show user images downloaded from web server using xmlrpc. The problem is that we cant quite figure out how to create a pixbuf from a buffer which contains the RAW contents of a file. You can use GdkPixbufLoader to do that. A sample implementation here (function get_pixbuf_from_image()): https://garage.maemo.org/plugins/scmsvn/viewcvs.php/trunk/src/util.c?root=vagalumeview=markup -- Alberto García González http://people.igalia.com/berto/ ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
