gtk/gdk/gdksubsurfaceprivate.h

/* GDK - The GIMP Drawing Kit
 * Copyright (C) 2023 Red Hat, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
 */

/* Uninstalled header defining types and functions internal to GDK */

#pragma once

#include "gdkenumtypes.h"
#include "gdksurface.h"
#include <graphene.h>

G_BEGIN_DECLS

typedef struct _GdkSubsurface GdkSubsurface;
typedef struct _GdkSubsurfaceClass GdkSubsurfaceClass;

#define GDK_TYPE_SUBSURFACE              (gdk_subsurface_get_type ())
#define GDK_SUBSURFACE(object)           (G_TYPE_CHECK_INSTANCE_CAST ((object), GDK_TYPE_SUBSURFACE, GdkSubsurface))
#define GDK_SUBSURFACE_CLASS(klass)      (G_TYPE_CHECK_CLASS_CAST ((klass), GDK_TYPE_SUBSURFACE, GdkSubsurfaceClass))
#define GDK_IS_SUBSURFACE(object)        (G_TYPE_CHECK_INSTANCE_TYPE ((object), GDK_TYPE_SUBSURFACE))
#define GDK_SUBSURFACE_GET_CLASS(obj)    (G_TYPE_INSTANCE_GET_CLASS ((obj), GDK_TYPE_SUBSURFACE, GdkSubsurfaceClass))

struct _GdkSubsurface
{
  GObject parent_instance;

  GdkSurface *parent;

  int ref_count;

  gboolean above_parent;
  GdkSubsurface *sibling_above;
  GdkSubsurface *sibling_below;
};

typedef enum {
  GDK_TEXTURE_TRANSFORM_NORMAL,
  GDK_TEXTURE_TRANSFORM_90,
  GDK_TEXTURE_TRANSFORM_180,
  GDK_TEXTURE_TRANSFORM_270,
  GDK_TEXTURE_TRANSFORM_FLIPPED,
  GDK_TEXTURE_TRANSFORM_FLIPPED_90,
  GDK_TEXTURE_TRANSFORM_FLIPPED_180,
  GDK_TEXTURE_TRANSFORM_FLIPPED_270,
} GdkTextureTransform;

struct _GdkSubsurfaceClass
{
  GObjectClass parent_class;

  gboolean     (* attach)              (GdkSubsurface         *subsurface,
                                        GdkTexture            *texture,
                                        const graphene_rect_t *source,
                                        const graphene_rect_t *dest,
                                        GdkTextureTransform    transform,
                                        const graphene_rect_t *bg,
                                        gboolean               above,
                                        GdkSubsurface         *sibling);
  void         (* detach)              (GdkSubsurface         *subsurface);
  GdkTexture * (* get_texture)         (GdkSubsurface         *subsurface);
  void         (* get_source_rect)     (GdkSubsurface         *subsurface,
                                        graphene_rect_t       *rect);
  void         (* get_texture_rect)    (GdkSubsurface         *subsurface,
                                        graphene_rect_t       *rect);
  GdkTextureTransform
               (* get_transform)       (GdkSubsurface         *subsurface);
  gboolean     (* get_background_rect) (GdkSubsurface         *subsurface,
                                        graphene_rect_t       *rect);
};

GType           gdk_subsurface_get_type            (void) G_GNUC_CONST;

GdkSurface *    gdk_subsurface_get_parent          (GdkSubsurface         *subsurface);

gboolean        gdk_subsurface_attach              (GdkSubsurface         *subsurface,
                                                    GdkTexture            *texture,
                                                    const graphene_rect_t *source,
                                                    const graphene_rect_t *dest,
                                                    GdkTextureTransform    transform,
                                                    const graphene_rect_t *background,
                                                    gboolean               above,
                                                    GdkSubsurface         *sibling);
void            gdk_subsurface_detach              (GdkSubsurface         *subsurface);
GdkTexture *    gdk_subsurface_get_texture         (GdkSubsurface         *subsurface);
void            gdk_subsurface_get_source_rect     (GdkSubsurface         *subsurface,
                                                    graphene_rect_t       *rect);
void            gdk_subsurface_get_texture_rect    (GdkSubsurface         *subsurface,
                                                    graphene_rect_t       *rect);
gboolean        gdk_subsurface_is_above_parent     (GdkSubsurface         *subsurface);
GdkSubsurface * gdk_subsurface_get_sibling         (GdkSubsurface         *subsurface,
                                                    gboolean               above);
GdkTextureTransform
                gdk_subsurface_get_transform       (GdkSubsurface         *subsurface);
gboolean        gdk_subsurface_get_background_rect (GdkSubsurface         *subsurface,
                                                    graphene_rect_t       *rect);
void            gdk_subsurface_get_bounds          (GdkSubsurface         *subsurface,
                                                    graphene_rect_t       *bounds);

G_END_DECLS