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2000-01-01 Federico Mena Quintero <federico@helixcode.com> * gdk-pixbuf/gdk-pixbuf.h (GdkPixbufAnimation): Added reference counting to animations. A web browser may want to share a single copy of an animated GIF if it appears multiple times in a web page, for example. * gdk-pixbuf/gdk-pixbuf-animation.c: New file. Moved the animation functions here. (gdk_pixbuf_animation_new_from_file): Prettified. Return a NULL animation if the loader does not support multiframe loading and the single-frame load returned NULL. Check that the filename is not NULL. Updated inline documentation. (gdk_pixbuf_animation_ref): New function. (gdk_pixbuf_animation_unref): New function. Removed gdk_pixbuf_animation_destroy() in favor of reference counting. * gdk-pixbuf/gdk-pixbuf-io.c (gdk_pixbuf_new_from_file): Prettified. Made ref_count assertion more paranoid. Check that the filename is not NULL. (gdk_pixbuf_get_module): Use guchar * and guint for buffer and size, respectively. (gdk_pixbuf_new_from_xpm_data): Changed the "data" argument to const char **. * gdk-pixbuf/io-gif.c (image_load_animation): Create the animation with a reference count of 1. * gdk-pixbuf/Makefile.am (libgdk_pixbuf_la_SOURCES): Added gdk-pixbuf-animation.c. * doc/tmpl/animation.sgml: Populated. It is still missing a description of the overlay modes. * doc/gdk-pixbuf-sections.txt: Added the animation section. Moved the canvas item section to the end, as it will be moved later to gnome-libs. * doc/gdk-pixbuf.sgml: Added the animation section. * doc/Makefile.am (tmpl_sources): Added tmpl/animation.sgml.
127 lines
2.9 KiB
Plaintext
127 lines
2.9 KiB
Plaintext
<!-- ##### SECTION Title ##### -->
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GdkPixbufLoader
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<!-- ##### SECTION Short_Description ##### -->
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Application-driven image loading.
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<!-- ##### SECTION Long_Description ##### -->
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<para>
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#GdkPixbufLoader provides a way for applications to drive the
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process of loading an image. Applications can use this
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functionality instead of gdk_pixbuf_new_from_file() when they need
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to parse image data in small chunks, such as when reading it from
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a network connection.
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</para>
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<!-- ##### SECTION See_Also ##### -->
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<para>
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gdk_pixbuf_new_from_file()
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</para>
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<!-- ##### MACRO GDK_PIXBUF_LOADER ##### -->
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<para>
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Casts a #GtkObject to a #GdkPixbufLoader.
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</para>
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@obj: A GTK+ object.
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<!-- ##### FUNCTION gdk_pixbuf_loader_new ##### -->
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<para>
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</para>
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@Returns:
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<!-- ##### FUNCTION gdk_pixbuf_loader_write ##### -->
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<para>
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</para>
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@loader:
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@buf:
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@count:
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@Returns:
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<!-- ##### FUNCTION gdk_pixbuf_loader_get_pixbuf ##### -->
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<para>
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</para>
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@loader:
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@Returns:
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<!-- ##### FUNCTION gdk_pixbuf_loader_get_animation ##### -->
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<para>
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</para>
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@loader:
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@Returns:
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<!-- ##### FUNCTION gdk_pixbuf_loader_close ##### -->
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<para>
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</para>
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@loader:
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<!-- ##### SIGNAL GdkPixbufLoader::area-updated ##### -->
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<para>
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This signal is emitted when a significant area of the image being
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loaded has been updated. Normally it means that a complete
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scanline has been read in, but it could be a different area as
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well. Applications can use this signal to know when to repaint
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areas of an image that is being loaded.
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</para>
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@gdkpixbufloader: the object which received the signal.
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@arg1:
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@arg2:
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@arg3:
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@arg4:
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<!-- # Unused Parameters # -->
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@loader: Loader which emitted the signal.
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@x: X offset of upper-left corner of the updated area.
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@y: Y offset of upper-left corner of the updated area.
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@width: Width of updated area.
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@height: Height of updated area.
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<!-- ##### SIGNAL GdkPixbufLoader::area-prepared ##### -->
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<para>
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This signal is emitted when the pixbuf loader has been fed the
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initial amount of data that is required to figure out the size and
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format of the image that it will create. After this signal is
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emitted, applications can call gdk_pixbuf_loader_get_pixbuf() to
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fetch the partially-loaded pixbuf.
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</para>
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@gdkpixbufloader: the object which received the signal.
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<!-- # Unused Parameters # -->
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@loader: Loader which emitted the signal.
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<!-- ##### SIGNAL GdkPixbufLoader::closed ##### -->
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<para>
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This signal is emitted when gdk_pixbuf_loader_close() is called.
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It can be used by different parts of an application to receive
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notification when an image loader is closed by the code that
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drives it.
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</para>
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@gdkpixbufloader: the object which received the signal.
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<!-- # Unused Parameters # -->
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@loader: Loader which emitted the signal.
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<!--
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Local variables:
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mode: sgml
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sgml-parent-document: ("../gdk-pixbuf.sgml" "book" "refsect2" "")
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End:
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-->
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