How can I update the gdk-pixbuf raw data?
Hello, I am new to GTK and have a problem with gdk-pixbuf, How can I update the pixbuf raw data? There is a pixbuf constructed from an image file, I want to change raw data behind it and upload new data back to pixbuf. I am using the "gdk_pIxbuf_save_to_buffer" for accessing raw data, but I don't know how to upload the buffer back to the pixbuf! Thanks, in advance, Zahra Zojaji ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
How can I update the gdk-pixbuf raw data?
Hello, I am using gdk-pixbuf and have a problem that is: Hello, I am using gdk-pixbuf-0.22 and have a problem: How can I update the pixbuf raw data? There Is a pixbuf constructed from an Image file, I want to change raw data behind It and upload new data back to pixbuf. I am using the "gdk_pIxbuf_save_to_buffer" for accessing raw data, but I don't know how to upload the buffer back to the pIxbuf! Thanks, in advance, Zahra Zojaji There is a pixbuf constructed from an image file, I want to change raw data behind it and upload new data back to pixbuf. I am using the "gdk_pIxbuf_save_to_buffer" for accessing raw data, but I don't know how to upload the buffer back to the pixbuf! Thanks, in advance, Zahra Zojaji ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: How can I update the gdk-pixbuf raw data?
Hello, Zahra. You can use GdkPixbufLoader for retrieve pixbuf from raw data. Code example: GdkPixbufLoader *loader = gdk_pixbuf_loader_new(); gdk_pixbuf_loader_write(loader, buffer, buffer_size, NULL); gdk_pixbuf_loader_close(loader, NULL); GdkPixbuf* pixbuf = gdk_pixbuf_copy(gdk_pixbuf_loader_get_pixbuf(loader)); g_object_unref(loader); Now 'pixbuf' contains image, previously stored in 'buffer'. If you want to do more complex things, than simple restoring pixbuf from buffer, you may read GdkPixbufLoader description http://library.gnome.org/devel/gdk-pixbuf/stable/GdkPixbufLoader.html > Hello, > I am new to GTK and have a problem with gdk-pixbuf, How can I update the > pixbuf raw data? > There is a pixbuf constructed from an image file, I want to > change raw data behind it and upload new data back to pixbuf. I am > using the "gdk_pIxbuf_save_to_buffer" for accessing raw data, but I > don't know how to upload the buffer back to the pixbuf! > Thanks, in advance, > Zahra Zojaji > ___ > gtk-app-devel-list mailing list > gtk-app-devel-list@gnome.org > http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list -- Andrey Tsyvarev Linux Verification Center, ISPRAS web:http://www.linuxtesting.org e-mail: tsyva...@ispras.ru ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: How can I update the gdk-pixbuf raw data?
Dear Andrey, Thanks alot for your guidance, but when i change the buffer data, image header is also changed, and when using "gdk_pixbuf_loader_write", an error of "unrecognized image file format" will be arised, this is because that the image format is important for the loader. is it any way to skip this restriction? Thanks, Zahra Zojaji -Original Message- From: Andrey Tsyvarev <tsyva...@ispras.ru> To: zzoj...@aim.com Cc: gtk-app-devel-list@gnome.org Sent: Fri, 15 May 2009 5:39 pm Subject: Re: How can I update the gdk-pixbuf raw data? Hello, Zahra.You can use GdkPixbufLoader for retrieve pixbuf from raw data. Code example:GdkPixbufLoader *loader = gdk_pixbuf_loader_new(); gdk_pixbuf_loader_write(loader, buffer, buffer_size, NULL); gdk_pixbuf_loader_close(loader, NULL); GdkPixbuf* pixbuf = gdk_pixbuf_copy(gdk_pixbuf_loader_get_pixbuf(loader)); g_object_unref(loader); Now 'pixbuf' contains image, previously stored in 'buffer'.If you want to do more complex things, than simple restoring pixbuf from buffer, you may read GdkPixbufLoader description http://library.gnome.org/devel/gdk-pixbuf/stable/GdkPixbufLoader.html > Hello, > I am new to GTK and have a problem with gdk-pixbuf, How can I update the pixbuf raw data?> There is a pixbuf constructed from an image file, I want to > change raw data behind it and upload new data back to pixbuf. I am > using the "gdk_pIxbuf_save_to_buffer" for accessing raw data, but I > don't know how to u pload the buffer back to the pixbuf! > Thanks, in advance, > Zahra Zojaji> ___ > gtk-app-devel-list mailing list > gtk-app-devel-list@gnome.org > http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list-- Andrey Tsyvarev Linux Verification Center, ISPRAS web: http://www.linuxtesting.org e-mail: tsyva...@ispras.ru ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: How can I update the gdk-pixbuf raw data?
Hello, Zahra > Dear Andrey, > Thanks alot for your guidance, but when i change the buffer > data, image header is also changed, and when using > "gdk_pixbuf_loader_write", an error of "unrecognized image file > format" will be arised, this is because that the image format is > important for the loader. > is it any way to skip this restriction? > Thanks, > Zahra Zojaji No, this restriction cannot be skipped - even typed loader(created via gdk_pixbuf_loader_new_with_type()) need image header for loading image correctly. But if you change buffer, can you also adjust header? By the way, pixbuf itself contains pixels as raw data - array of rows, each row is array of pixels (http://library.gnome.org/devel/gdk-pixbuf/stable/gdk-pixbuf-gdk-pixbuf.html). May be, it is easier to manipulate with pixels of pixbuf itself? Or create copy of pixbuf, and manipulate with copy. Later you can synchronize pixbufs using gdk_pixbuf_copy or gdk_pixbuf_copy_area. > -Original Message- > From: Andrey Tsyvarev > To: zzoj...@aim.com > Cc: gtk-app-devel-list@gnome.org > Sent: Fri, 15 May 2009 5:39 pm > Subject: Re: How can I update the gdk-pixbuf raw data? > Hello, Zahra.You can use GdkPixbufLoader for retrieve pixbuf > from raw data. Code example:GdkPixbufLoader *loader = > gdk_pixbuf_loader_new(); gdk_pixbuf_loader_write(loader, buffer, > buffer_size, NULL); gdk_pixbuf_loader_close(loader, NULL); > GdkPixbuf* pixbuf = > gdk_pixbuf_copy(gdk_pixbuf_loader_get_pixbuf(loader)); > g_object_unref(loader);Now 'pixbuf' contains image, > previously stored in 'buffer'.If you want to do more complex > things, than simple restoring pixbuf from buffer, you may read > GdkPixbufLoader description > http://library.gnome.org/devel/gdk-pixbuf/stable/GdkPixbufLoader.html > > Hello, > I am new to GTK and have a problem with > gdk-pixbuf, How can I update the pixbuf raw data? > > There is a pixbuf constructed from an image file, I want > to > change raw data behind it and upload new data back to pixbuf. > I am > using the "gdk_pIxbuf_save_to_buffer" for accessing raw > data, but I > don't know how to upload the buffer back to the > pixbuf! > Thanks, in advance, > Zahra Zojaji > > ___ > > gtk-app-devel-list mailing list > gtk-app-devel-list@gnome.org > > http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list -- > Andrey Tsyvarev Linux Verification Center, ISPRAS web: > http://www.linuxtesting.org e-mail: tsyva...@ispras.ru > We found the real 'Hotel California' and the 'Seinfeld' diner. > What will you find? Explore WhereItsAt.com. -- Andrey Tsyvarev Linux Verification Center, ISPRAS web:http://www.linuxtesting.org e-mail: tsyva...@ispras.ru ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
