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124 lines
3.7 KiB
C
124 lines
3.7 KiB
C
/* GDK - The GIMP Drawing Kit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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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 Lesser 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser 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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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "config.h"
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#include "gdkdrawable.h"
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#include "gdkcairo.h"
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#include "gdkinternals.h"
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#include "gdkwindow.h"
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#include "gdkscreen.h"
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#include "gdkpixbuf.h"
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#include <pango/pangocairo.h>
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include <math.h>
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G_DEFINE_ABSTRACT_TYPE (GdkDrawable, gdk_drawable, G_TYPE_OBJECT)
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static void
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gdk_drawable_class_init (GdkDrawableClass *klass)
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{
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}
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static void
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gdk_drawable_init (GdkDrawable *drawable)
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{
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}
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/**
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* gdk_drawable_get_clip_region:
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* @drawable: a #GdkDrawable
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*
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* Computes the region of a drawable that potentially can be written
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* to by drawing primitives. This region will not take into account
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* the clip region for the GC, and may also not take into account
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* other factors such as if the window is obscured by other windows,
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* but no area outside of this region will be affected by drawing
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* primitives.
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*
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* Returns: a #cairo_region_t. This must be freed with cairo_region_destroy()
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* when you are done.
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**/
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cairo_region_t *
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gdk_drawable_get_clip_region (GdkDrawable *drawable)
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{
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g_return_val_if_fail (GDK_IS_DRAWABLE (drawable), NULL);
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return GDK_DRAWABLE_GET_CLASS (drawable)->get_clip_region (drawable);
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}
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/**
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* gdk_drawable_get_visible_region:
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* @drawable: a #GdkDrawable
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*
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* Computes the region of a drawable that is potentially visible.
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* This does not necessarily take into account if the window is
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* obscured by other windows, but no area outside of this region
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* is visible.
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*
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* Returns: a #cairo_region_t. This must be freed with cairo_region_destroy()
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* when you are done.
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**/
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cairo_region_t *
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gdk_drawable_get_visible_region (GdkDrawable *drawable)
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{
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g_return_val_if_fail (GDK_IS_DRAWABLE (drawable), NULL);
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return GDK_DRAWABLE_GET_CLASS (drawable)->get_visible_region (drawable);
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}
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/**
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* _gdk_drawable_ref_cairo_surface:
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* @drawable: a #GdkDrawable
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*
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* Obtains a #cairo_surface_t for the given drawable. If a
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* #cairo_surface_t for the drawable already exists, it will be
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* referenced, otherwise a new surface will be created.
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*
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* Return value: a newly referenced #cairo_surface_t that points
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* to @drawable. Unref with cairo_surface_destroy()
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**/
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cairo_surface_t *
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_gdk_drawable_ref_cairo_surface (GdkDrawable *drawable)
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{
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g_return_val_if_fail (GDK_IS_DRAWABLE (drawable), NULL);
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return GDK_DRAWABLE_GET_CLASS (drawable)->ref_cairo_surface (drawable);
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}
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/************************************************************************/
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cairo_surface_t *
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_gdk_drawable_create_cairo_surface (GdkDrawable *drawable,
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int width,
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int height)
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{
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return GDK_DRAWABLE_GET_CLASS (drawable)->create_cairo_surface (drawable,
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width, height);
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}
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