mirror of
https://gitlab.gnome.org/GNOME/gtk.git
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started work on the loader
This commit is contained in:
Jonathan Blandford
parent
4c9ee0caa9
commit
cfc2866019
@ -44,13 +44,15 @@ libgdk_pixbufincludedir = $(includedir)/gdk-pixbuf
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libgdk_pixbuf_la_SOURCES = \
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gdk-pixbuf.c \
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gdk-pixbuf-loader.c \
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gdk-pixbuf-io.c \
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gdk-pixbuf-data.c
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libgdk_pixbuf_la_LDFLAGS = -version-info 1:0:0
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libgdk_pixbufinclude_HEADERS = \
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gdk-pixbuf.h
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gdk-pixbuf.h \
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gdk-pixbuf-loader.h
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#
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# The PNG plugin.
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190
gdk-pixbuf/gdk-pixbuf-loader.c
Normal file
190
gdk-pixbuf/gdk-pixbuf-loader.c
Normal file
@ -0,0 +1,190 @@
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/* GdkPixbuf library - Main header file
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*
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* Copyright (C) 1999 The Free Software Foundation
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*
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* Authors: Mark Crichton <crichton@gimp.org>
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* Miguel de Icaza <miguel@gnu.org>
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* Federico Mena-Quintero <federico@gimp.org>
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* Jonathan Blandford <jrb@redhat.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "gdk-pixbuf-loader.h"
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static GtkObjectClass *parent_class;
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static void gdk_pixbuf_loader_class_init (GdkPixbufLoaderClass *klass);
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static void gdk_pixbuf_loader_init (GdkPixbufLoader *loader);
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static void gdk_pixbuf_loader_destroy (GdkPixbufLoader *loader);
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static void gdk_pixbuf_loader_finalize (GdkPixbufLoader *loader);
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/* Internal data */
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typedef struct _GdkPixbufLoaderPrivate GdkPixbufLoaderPrivate;
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struct _GdkPixbufLoaderPrivate
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{
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GdkPixbuf *pixbuf;
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gboolean closed;
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};
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GtkType
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gdk_pixbuf_loader_get_type (void)
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{
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static GtkType loader_type = 0;
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if (!loader_type) {
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static const GtkTypeInfo loader_info = {
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"GdkPixbufLoader",
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sizeof (GdkPixbufLoader),
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sizeof (GdkPixbufLoaderClass),
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(GtkClassInitFunc) gdk_pixbuf_loader_class_init,
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(GtkObjectInitFunc) gdk_pixbuf_loader_init,
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/* reserved_1 */ NULL,
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/* reserved_2 */ NULL,
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(GtkClassInitFunc) NULL,
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};
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loader_type = gtk_type_unique (GTK_TYPE_OBJECT, &loader_info);
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}
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return loader_type;
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}
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static void
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gdk_pixbuf_loader_class_init (GdkPixbufLoaderClass *klass)
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{
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parent_class = GTK_OBJECT_CLASS (klass);
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parent_class->destroy = gdk_pixbuf_loader_destroy;
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parent_class->finalize = gdk_pixbuf_loader_finalize;
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}
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static void
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gdk_pixbuf_loader_init (GdkPixbufLoader *loader)
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{
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GdkPixbuf *pixbuf;
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loader->private = g_new (GdkPixbufLoaderPrivate, 1);
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loader->pixbuf = NULL;
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loader->closed = FALSE;
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}
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static void
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gdk_pixbuf_loader_destroy (GdkPixbufLoader *loader)
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{
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GdkPixbufLoaderPrivate *priv;
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priv = loader->private;
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gdk_pixbuf_unref (priv->pixbuf);
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}
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static void
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gdk_pixbuf_loader_finalize (GdkPixbufLoader *loader)
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{
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GdkPixbufLoaderPrivate *priv;
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priv = loader->private;
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g_free (priv);
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}
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/* Public functions */
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GtkObject *
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gdk_pixbuf_loader_new (void)
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{
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GdkPixbufLoader *loader;
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loader = gtk_type_new (gdk_pixbuf_loader_get_type ());
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return GTK_OBJECT (loader);
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}
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/**
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* gdk_pixbuf_loader_write:
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* @loader: A loader.
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* @buf: The image data.
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* @count: The length of @buf in bytes.
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*
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* This will load the next @size bytes of the image. It will return TRUE if the
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* data was loaded successfully, and FALSE if an error occurred. In this case,
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* the loader will be closed, and will not accept further writes.
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*
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* Return value: Returns TRUE if the write was successful -- FALSE if the loader
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* cannot parse the buf.
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**/
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gboolean
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gdk_pixbuf_loader_write (GdkPixbufLoader *loader, gchar *buf, size_t count)
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{
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GdkPixbufLoaderPrivate *priv;
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g_return_val_if_fail (loader != NULL, FALSE);
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g_return_val_if_fail (GDK_IS_PIXBUF_LOADER (loader), FALSE);
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priv = loader->private;
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/* we expect it's not to be closed */
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g_return_val_if_fail (priv->closed == FALSE, FALSE);
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return TRUE;
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}
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/**
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* gdk_pixbuf_loader_get_pixbuf:
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* @loader: A loader.
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*
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* Gets the GdkPixbuf that the loader is currently loading. If the loader
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* hasn't been enough data via gdk_pixbuf_loader_write, then NULL is returned.
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* Any application using this function should check for this value when it is
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* used. The pixbuf returned will be the same in all future calls to the
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* loader, so simply calling a gdk_pixbuf_ref() should be sufficient to continue
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* using it.
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*
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* Return value: The GdkPixbuf that the loader is loading.
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**/
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GdkPixbuf *
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gdk_pixbuf_loader_get_pixbuf (GdkPixbufLoader *loader)
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{
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GdkPixbufLoaderPrivate *priv;
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g_return_val_if_fail (loader != NULL, NULL);
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g_return_val_if_fail (GDK_IS_PIXBUF_LOADER (loader), NULL);
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priv = loader->private;
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return priv->pixbuf;
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}
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/**
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* gdk_pixbuf_loader_close:
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* @loader: A loader.
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*
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* Tells the loader to stop accepting writes
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*
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**/
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void
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gdk_pixbuf_loader_close (GdkPixbufLoader *loader)
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{
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GdkPixbufLoaderPrivate *priv;
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g_return_if_fail (loader != NULL);
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g_return_if_fail (GDK_IS_PIXBUF_LOADER (loader));
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priv = loader->private;
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/* we expect it's not closed */
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g_return_if_fail (priv->closed == FALSE);
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priv->closed = TRUE;
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}
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79
gdk-pixbuf/gdk-pixbuf-loader.h
Normal file
79
gdk-pixbuf/gdk-pixbuf-loader.h
Normal file
@ -0,0 +1,79 @@
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/* GdkPixbuf library - Main header file
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*
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* Copyright (C) 1999 The Free Software Foundation
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*
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* Authors: Mark Crichton <crichton@gimp.org>
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* Miguel de Icaza <miguel@gnu.org>
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* Federico Mena-Quintero <federico@gimp.org>
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* Jonathan Blandford <jrb@redhat.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef GDK_PIXBUF_LOADER_H
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#define GDK_PIXBUF_LOADER_H
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#include <unistd.h>
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#include <gtk/gtkobject.h>
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#include "gdk-pixbuf.h"
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#ifdef __cplusplus
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extern "C" {
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#pragma }
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#endif
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#define GDK_TYPE_PIXBUF_LOADER (gtk_pixbuf_get_type ())
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#define GDK_PIXBUF_LOADER (obj) (GTK_CHECK_CAST ((obj), GTK_TYPE_HBOX, GtkHBox))
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#define GDK_PIXBUF_LOADER_CLASS (klass) (GTK_CHECK_CLASS_CAST ((klass), GTK_TYPE_HBOX, GtkHBoxClass))
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#define GDK_IS_PIXBUF_LOADER (obj) (GTK_CHECK_TYPE ((obj), GTK_TYPE_HBOX))
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#define GDK_IS_PIXBUF_LOADER_CLASS (klass) (GTK_CHECK_CLASS_TYPE ((klass), GTK_TYPE_HBOX))
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typedef struct _GdkPixbufLoader GdkPixbufLoader;
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struct _GdkPixbufLoader
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{
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GtkObject object;
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/* < Private > */
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gpointer data;
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};
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typedef struct _GdkPixbufLoaderClass GdkPixbufLoaderClass;
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struct _GdkPixbufLoaderClass {
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GtkObjectClass parent_class;
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#if 0
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/* If it get's implemented */
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void (* area_updated) (GdkPixbufLoader *loader,
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int x, int y, int width, int height);
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#endif
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};
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GtkObject *gdk_pixbuf_loader_new (void);
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gboolean gdk_pixbuf_loader_write (GdkPixbufLoader *loader, gchar *buf, size_t count);
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GdkPixbuf *gdk_pixbuf_loader_get_pixbuf (GdkPixbufLoader *loader);
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void gdk_pixbuf_loader_close (GdkPixbufLoader *loader);
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#ifdef __cplusplus
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}
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#endif
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#endif
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@ -31,6 +31,7 @@
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#ifdef __cplusplus
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extern "C" {
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#pragma }
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#endif
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@ -66,6 +67,7 @@ GdkPixbuf *gdk_pixbuf_new_from_data (guchar *data, ArtPixFormat format, gboolean
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ArtDestroyNotify dfunc, gpointer dfunc_data);
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GdkPixbuf *gdk_pixbuf_new_from_xpm_data (const gchar **data);
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/* Transformations */
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#if 0
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GdkPixbuf *gdk_pixbuf_scale (const GdkPixbuf *pixbuf, gint w, gint h);
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190
gtk/gdk-pixbuf-loader.c
Normal file
190
gtk/gdk-pixbuf-loader.c
Normal file
@ -0,0 +1,190 @@
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/* GdkPixbuf library - Main header file
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*
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* Copyright (C) 1999 The Free Software Foundation
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*
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* Authors: Mark Crichton <crichton@gimp.org>
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* Miguel de Icaza <miguel@gnu.org>
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* Federico Mena-Quintero <federico@gimp.org>
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* Jonathan Blandford <jrb@redhat.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
|
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
|
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*
|
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "gdk-pixbuf-loader.h"
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static GtkObjectClass *parent_class;
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static void gdk_pixbuf_loader_class_init (GdkPixbufLoaderClass *klass);
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static void gdk_pixbuf_loader_init (GdkPixbufLoader *loader);
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static void gdk_pixbuf_loader_destroy (GdkPixbufLoader *loader);
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static void gdk_pixbuf_loader_finalize (GdkPixbufLoader *loader);
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/* Internal data */
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typedef struct _GdkPixbufLoaderPrivate GdkPixbufLoaderPrivate;
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struct _GdkPixbufLoaderPrivate
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{
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GdkPixbuf *pixbuf;
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gboolean closed;
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};
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GtkType
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gdk_pixbuf_loader_get_type (void)
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{
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static GtkType loader_type = 0;
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if (!loader_type) {
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static const GtkTypeInfo loader_info = {
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"GdkPixbufLoader",
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sizeof (GdkPixbufLoader),
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sizeof (GdkPixbufLoaderClass),
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(GtkClassInitFunc) gdk_pixbuf_loader_class_init,
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(GtkObjectInitFunc) gdk_pixbuf_loader_init,
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/* reserved_1 */ NULL,
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/* reserved_2 */ NULL,
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(GtkClassInitFunc) NULL,
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};
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loader_type = gtk_type_unique (GTK_TYPE_OBJECT, &loader_info);
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}
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return loader_type;
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}
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static void
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gdk_pixbuf_loader_class_init (GdkPixbufLoaderClass *klass)
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{
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parent_class = GTK_OBJECT_CLASS (klass);
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parent_class->destroy = gdk_pixbuf_loader_destroy;
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parent_class->finalize = gdk_pixbuf_loader_finalize;
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}
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static void
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gdk_pixbuf_loader_init (GdkPixbufLoader *loader)
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{
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GdkPixbuf *pixbuf;
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loader->private = g_new (GdkPixbufLoaderPrivate, 1);
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loader->pixbuf = NULL;
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loader->closed = FALSE;
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}
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static void
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gdk_pixbuf_loader_destroy (GdkPixbufLoader *loader)
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{
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GdkPixbufLoaderPrivate *priv;
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priv = loader->private;
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gdk_pixbuf_unref (priv->pixbuf);
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}
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static void
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gdk_pixbuf_loader_finalize (GdkPixbufLoader *loader)
|
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{
|
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GdkPixbufLoaderPrivate *priv;
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priv = loader->private;
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g_free (priv);
|
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}
|
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|
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/* Public functions */
|
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GtkObject *
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gdk_pixbuf_loader_new (void)
|
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{
|
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GdkPixbufLoader *loader;
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|
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loader = gtk_type_new (gdk_pixbuf_loader_get_type ());
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return GTK_OBJECT (loader);
|
||||
}
|
||||
|
||||
/**
|
||||
* gdk_pixbuf_loader_write:
|
||||
* @loader: A loader.
|
||||
* @buf: The image data.
|
||||
* @count: The length of @buf in bytes.
|
||||
*
|
||||
* This will load the next @size bytes of the image. It will return TRUE if the
|
||||
* data was loaded successfully, and FALSE if an error occurred. In this case,
|
||||
* the loader will be closed, and will not accept further writes.
|
||||
*
|
||||
* Return value: Returns TRUE if the write was successful -- FALSE if the loader
|
||||
* cannot parse the buf.
|
||||
**/
|
||||
gboolean
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||||
gdk_pixbuf_loader_write (GdkPixbufLoader *loader, gchar *buf, size_t count)
|
||||
{
|
||||
GdkPixbufLoaderPrivate *priv;
|
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|
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g_return_val_if_fail (loader != NULL, FALSE);
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g_return_val_if_fail (GDK_IS_PIXBUF_LOADER (loader), FALSE);
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priv = loader->private;
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||||
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||||
/* we expect it's not to be closed */
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||||
g_return_val_if_fail (priv->closed == FALSE, FALSE);
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return TRUE;
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||||
}
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||||
|
||||
/**
|
||||
* gdk_pixbuf_loader_get_pixbuf:
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* @loader: A loader.
|
||||
*
|
||||
* Gets the GdkPixbuf that the loader is currently loading. If the loader
|
||||
* hasn't been enough data via gdk_pixbuf_loader_write, then NULL is returned.
|
||||
* Any application using this function should check for this value when it is
|
||||
* used. The pixbuf returned will be the same in all future calls to the
|
||||
* loader, so simply calling a gdk_pixbuf_ref() should be sufficient to continue
|
||||
* using it.
|
||||
*
|
||||
* Return value: The GdkPixbuf that the loader is loading.
|
||||
**/
|
||||
GdkPixbuf *
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gdk_pixbuf_loader_get_pixbuf (GdkPixbufLoader *loader)
|
||||
{
|
||||
GdkPixbufLoaderPrivate *priv;
|
||||
|
||||
g_return_val_if_fail (loader != NULL, NULL);
|
||||
g_return_val_if_fail (GDK_IS_PIXBUF_LOADER (loader), NULL);
|
||||
priv = loader->private;
|
||||
|
||||
return priv->pixbuf;
|
||||
}
|
||||
|
||||
/**
|
||||
* gdk_pixbuf_loader_close:
|
||||
* @loader: A loader.
|
||||
*
|
||||
* Tells the loader to stop accepting writes
|
||||
*
|
||||
**/
|
||||
void
|
||||
gdk_pixbuf_loader_close (GdkPixbufLoader *loader)
|
||||
{
|
||||
GdkPixbufLoaderPrivate *priv;
|
||||
|
||||
g_return_if_fail (loader != NULL);
|
||||
g_return_if_fail (GDK_IS_PIXBUF_LOADER (loader));
|
||||
|
||||
priv = loader->private;
|
||||
|
||||
/* we expect it's not closed */
|
||||
g_return_if_fail (priv->closed == FALSE);
|
||||
priv->closed = TRUE;
|
||||
}
|
||||
|
||||
79
gtk/gdk-pixbuf-loader.h
Normal file
79
gtk/gdk-pixbuf-loader.h
Normal file
@ -0,0 +1,79 @@
|
||||
/* GdkPixbuf library - Main header file
|
||||
*
|
||||
* Copyright (C) 1999 The Free Software Foundation
|
||||
*
|
||||
* Authors: Mark Crichton <crichton@gimp.org>
|
||||
* Miguel de Icaza <miguel@gnu.org>
|
||||
* Federico Mena-Quintero <federico@gimp.org>
|
||||
* Jonathan Blandford <jrb@redhat.com>
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Library General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2 of the License, or (at your option) any later version.
|
||||
*
|
||||
* This library is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Library General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Library General Public
|
||||
* License along with this library; if not, write to the
|
||||
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
||||
* Boston, MA 02111-1307, USA.
|
||||
*/
|
||||
|
||||
#ifndef GDK_PIXBUF_LOADER_H
|
||||
#define GDK_PIXBUF_LOADER_H
|
||||
|
||||
#include <unistd.h>
|
||||
#include <gtk/gtkobject.h>
|
||||
#include "gdk-pixbuf.h"
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#pragma }
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
#define GDK_TYPE_PIXBUF_LOADER (gtk_pixbuf_get_type ())
|
||||
#define GDK_PIXBUF_LOADER (obj) (GTK_CHECK_CAST ((obj), GTK_TYPE_HBOX, GtkHBox))
|
||||
#define GDK_PIXBUF_LOADER_CLASS (klass) (GTK_CHECK_CLASS_CAST ((klass), GTK_TYPE_HBOX, GtkHBoxClass))
|
||||
#define GDK_IS_PIXBUF_LOADER (obj) (GTK_CHECK_TYPE ((obj), GTK_TYPE_HBOX))
|
||||
#define GDK_IS_PIXBUF_LOADER_CLASS (klass) (GTK_CHECK_CLASS_TYPE ((klass), GTK_TYPE_HBOX))
|
||||
|
||||
|
||||
typedef struct _GdkPixbufLoader GdkPixbufLoader;
|
||||
struct _GdkPixbufLoader
|
||||
{
|
||||
GtkObject object;
|
||||
|
||||
/* < Private > */
|
||||
gpointer data;
|
||||
};
|
||||
|
||||
typedef struct _GdkPixbufLoaderClass GdkPixbufLoaderClass;
|
||||
struct _GdkPixbufLoaderClass {
|
||||
GtkObjectClass parent_class;
|
||||
#if 0
|
||||
/* If it get's implemented */
|
||||
void (* area_updated) (GdkPixbufLoader *loader,
|
||||
int x, int y, int width, int height);
|
||||
#endif
|
||||
};
|
||||
|
||||
|
||||
|
||||
GtkObject *gdk_pixbuf_loader_new (void);
|
||||
gboolean gdk_pixbuf_loader_write (GdkPixbufLoader *loader, gchar *buf, size_t count);
|
||||
GdkPixbuf *gdk_pixbuf_loader_get_pixbuf (GdkPixbufLoader *loader);
|
||||
void gdk_pixbuf_loader_close (GdkPixbufLoader *loader);
|
||||
|
||||
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue
Block a user