gtk2/gdk/win32/gdkcairocontext-win32.h

/* GDK - The GIMP Drawing Kit
 *
 * Copyright © 2018  Benjamin Otte
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */

#ifndef __GDK_WIN32_CAIRO_CONTEXT__
#define __GDK_WIN32_CAIRO_CONTEXT__

#include "gdkconfig.h"

#include "gdkcairocontextprivate.h"

G_BEGIN_DECLS

#define GDK_TYPE_WIN32_CAIRO_CONTEXT		(gdk_win32_cairo_context_get_type ())
#define GDK_WIN32_CAIRO_CONTEXT(obj)		(G_TYPE_CHECK_INSTANCE_CAST ((obj), GDK_TYPE_WIN32_CAIRO_CONTEXT, GdkWin32CairoContext))
#define GDK_IS_WIN32_CAIRO_CONTEXT(obj)		(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GDK_TYPE_WIN32_CAIRO_CONTEXT))
#define GDK_WIN32_CAIRO_CONTEXT_CLASS(klass) 	(G_TYPE_CHECK_CLASS_CAST ((klass), GDK_TYPE_WIN32_CAIRO_CONTEXT, GdkWin32CairoContextClass))
#define GDK_IS_WIN32_CAIRO_CONTEXT_CLASS(klass)	(G_TYPE_CHECK_CLASS_TYPE ((klass), GDK_TYPE_WIN32_CAIRO_CONTEXT))
#define GDK_WIN32_CAIRO_CONTEXT_GET_CLASS(obj)	(G_TYPE_INSTANCE_GET_CLASS ((obj), GDK_TYPE_WIN32_CAIRO_CONTEXT, GdkWin32CairoContextClass))

typedef struct _GdkWin32CairoContext GdkWin32CairoContext;
typedef struct _GdkWin32CairoContextClass GdkWin32CairoContextClass;

struct _GdkWin32CairoContext
{
  GdkCairoContext parent_instance;

  /* Set to TRUE when double-buffering is used.
   * Layered windows use their own, custom double-buffering
   * code that is unaffected by this flag.
   */
  guint            double_buffered : 1;
  /* Re-set to the same value as GdkSurfaceImplWin32->layered
   * every frame (since layeredness can change at runtime).
   */
  guint            layered : 1;

  /* The a surface for double-buffering. We keep it
   * around between repaints, and only re-allocate it
   * if it's too small. */
  cairo_surface_t *db_surface;
  int              db_width;
  int              db_height;

  /* Surface for the window DC (in non-layered mode).
   * A reference of the cache surface (in layered mode). */
  cairo_surface_t *window_surface;
  /* A reference to db_surface (when double-buffering).
   * When not using double-buffering or in layered mode
   * this is a reference to window_surface.
   */
  cairo_surface_t *paint_surface;
};

struct _GdkWin32CairoContextClass
{
  GdkCairoContextClass parent_class;
};

GDK_AVAILABLE_IN_ALL
GType gdk_win32_cairo_context_get_type (void) G_GNUC_CONST;

G_END_DECLS

#endif /* __GDK_WIN32_CAIRO_CONTEXT__ */