gtk2/gdk/gdksurface.h

/* GDK - The GIMP Drawing Kit
 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
 *
 * 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/>.
 */

/*
 * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
 * file for a list of people on the GTK+ Team.  See the ChangeLog
 * files for a list of changes.  These files are distributed with
 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
 */

#ifndef __GDK_SURFACE_H__
#define __GDK_SURFACE_H__

#if !defined (__GDK_H_INSIDE__) && !defined (GTK_COMPILATION)
#error "Only <gdk/gdk.h> can be included directly."
#endif

#include <gdk/gdkversionmacros.h>
#include <gdk/gdktypes.h>
#include <gdk/gdkevents.h>
#include <gdk/gdkframeclock.h>
#include <gdk/gdkmonitor.h>
#include <gdk/gdkpopuplayout.h>

G_BEGIN_DECLS

/* Size restriction enumeration.
 */
/**
 * GdkSurfaceHints:
 * @GDK_HINT_POS: indicates that the program has positioned the surface
 * @GDK_HINT_MIN_SIZE: min size fields are set
 * @GDK_HINT_MAX_SIZE: max size fields are set
 * @GDK_HINT_BASE_SIZE: base size fields are set
 * @GDK_HINT_ASPECT: aspect ratio fields are set
 * @GDK_HINT_RESIZE_INC: resize increment fields are set
 * @GDK_HINT_WIN_GRAVITY: surface gravity field is set
 * @GDK_HINT_USER_POS: indicates that the surface’s position was explicitly set
 *  by the user
 * @GDK_HINT_USER_SIZE: indicates that the surface’s size was explicitly set by
 *  the user
 *
 * Used to indicate which fields of a #GdkGeometry struct should be paid
 * attention to. Also, the presence/absence of @GDK_HINT_POS,
 * @GDK_HINT_USER_POS, and @GDK_HINT_USER_SIZE is significant, though they don't
 * directly refer to #GdkGeometry fields. @GDK_HINT_USER_POS will be set
 * automatically by #GtkWindow if you call gtk_window_move().
 * @GDK_HINT_USER_POS and @GDK_HINT_USER_SIZE should be set if the user
 * specified a size/position using a --geometry command-line argument;
 * gtk_window_parse_geometry() automatically sets these flags.
 */
typedef enum
{
  GDK_HINT_POS	       = 1 << 0,
  GDK_HINT_MIN_SIZE    = 1 << 1,
  GDK_HINT_MAX_SIZE    = 1 << 2,
  GDK_HINT_BASE_SIZE   = 1 << 3,
  GDK_HINT_ASPECT      = 1 << 4,
  GDK_HINT_RESIZE_INC  = 1 << 5,
  GDK_HINT_WIN_GRAVITY = 1 << 6,
  GDK_HINT_USER_POS    = 1 << 7,
  GDK_HINT_USER_SIZE   = 1 << 8
} GdkSurfaceHints;

/**
 * GdkSurfaceEdge:
 * @GDK_SURFACE_EDGE_NORTH_WEST: the top left corner.
 * @GDK_SURFACE_EDGE_NORTH: the top edge.
 * @GDK_SURFACE_EDGE_NORTH_EAST: the top right corner.
 * @GDK_SURFACE_EDGE_WEST: the left edge.
 * @GDK_SURFACE_EDGE_EAST: the right edge.
 * @GDK_SURFACE_EDGE_SOUTH_WEST: the lower left corner.
 * @GDK_SURFACE_EDGE_SOUTH: the lower edge.
 * @GDK_SURFACE_EDGE_SOUTH_EAST: the lower right corner.
 *
 * Determines a surface edge or corner.
 */
typedef enum
{
  GDK_SURFACE_EDGE_NORTH_WEST,
  GDK_SURFACE_EDGE_NORTH,
  GDK_SURFACE_EDGE_NORTH_EAST,
  GDK_SURFACE_EDGE_WEST,
  GDK_SURFACE_EDGE_EAST,
  GDK_SURFACE_EDGE_SOUTH_WEST,
  GDK_SURFACE_EDGE_SOUTH,
  GDK_SURFACE_EDGE_SOUTH_EAST
} GdkSurfaceEdge;

/**
 * GdkFullscreenMode:
 * @GDK_FULLSCREEN_ON_CURRENT_MONITOR: Fullscreen on current monitor only.
 * @GDK_FULLSCREEN_ON_ALL_MONITORS: Span across all monitors when fullscreen.
 *
 * Indicates which monitor (in a multi-head setup) a surface should span over
 * when in fullscreen mode.
 **/
typedef enum
{
  GDK_FULLSCREEN_ON_CURRENT_MONITOR,
  GDK_FULLSCREEN_ON_ALL_MONITORS
} GdkFullscreenMode;

/**
 * GdkGeometry:
 * @min_width: minimum width of surface (or -1 to use requisition, with
 *  #GtkWindow only)
 * @min_height: minimum height of surface (or -1 to use requisition, with
 *  #GtkWindow only)
 * @max_width: maximum width of surface (or -1 to use requisition, with
 *  #GtkWindow only)
 * @max_height: maximum height of surface (or -1 to use requisition, with
 *  #GtkWindow only)
 * @base_width: allowed surface widths are @base_width + @width_inc * N where N
 *  is any integer (-1 allowed with #GtkWindow)
 * @base_height: allowed surface widths are @base_height + @height_inc * N where
 *  N is any integer (-1 allowed with #GtkWindow)
 * @width_inc: width resize increment
 * @height_inc: height resize increment
 * @min_aspect: minimum width/height ratio
 * @max_aspect: maximum width/height ratio
 * @win_gravity: surface gravity, see gtk_window_set_gravity()
 *
 * The #GdkGeometry struct gives the window manager information about
 * a surface’s geometry constraints. Normally you would set these on
 * the GTK+ level using gtk_window_set_geometry_hints(). #GtkWindow
 * then sets the hints on the #GdkSurface it creates.
 *
 * gdk_surface_set_geometry_hints() expects the hints to be fully valid already
 * and simply passes them to the window manager; in contrast,
 * gtk_window_set_geometry_hints() performs some interpretation. For example,
 * #GtkWindow will apply the hints to the geometry widget instead of the
 * toplevel window, if you set a geometry widget. Also, the
 * @min_width/@min_height/@max_width/@max_height fields may be set to -1, and
 * #GtkWindow will substitute the size request of the surface or geometry widget.
 * If the minimum size hint is not provided, #GtkWindow will use its requisition
 * as the minimum size. If the minimum size is provided and a geometry widget is
 * set, #GtkWindow will take the minimum size as the minimum size of the
 * geometry widget rather than the entire surface. The base size is treated
 * similarly.
 *
 * The canonical use-case for gtk_window_set_geometry_hints() is to get a
 * terminal widget to resize properly. Here, the terminal text area should be
 * the geometry widget; #GtkWindow will then automatically set the base size to
 * the size of other widgets in the terminal window, such as the menubar and
 * scrollbar. Then, the @width_inc and @height_inc fields should be set to the
 * size of one character in the terminal. Finally, the base size should be set
 * to the size of one character. The net effect is that the minimum size of the
 * terminal will have a 1x1 character terminal area, and only terminal sizes on
 * the “character grid” will be allowed.
 *
 * Here’s an example of how the terminal example would be implemented, assuming
 * a terminal area widget called “terminal” and a toplevel window “toplevel”:
 *
 * |[<!-- language="C" -->
 * 	GdkGeometry hints;
 *
 * 	hints.base_width = terminal->char_width;
 *         hints.base_height = terminal->char_height;
 *         hints.min_width = terminal->char_width;
 *         hints.min_height = terminal->char_height;
 *         hints.width_inc = terminal->char_width;
 *         hints.height_inc = terminal->char_height;
 *
 *  gtk_window_set_geometry_hints (GTK_WINDOW (toplevel),
 *                                 GTK_WIDGET (terminal),
 *                                 &hints,
 *                                 GDK_HINT_RESIZE_INC |
 *                                 GDK_HINT_MIN_SIZE |
 *                                 GDK_HINT_BASE_SIZE);
 * ]|
 *
 * The other useful fields are the @min_aspect and @max_aspect fields; these
 * contain a width/height ratio as a floating point number. If a geometry widget
 * is set, the aspect applies to the geometry widget rather than the entire
 * window. The most common use of these hints is probably to set @min_aspect and
 * @max_aspect to the same value, thus forcing the window to keep a constant
 * aspect ratio.
 */
struct _GdkGeometry
{
  gint min_width;
  gint min_height;
  gint max_width;
  gint max_height;
  gint base_width;
  gint base_height;
  gint width_inc;
  gint height_inc;
  gdouble min_aspect;
  gdouble max_aspect;
  GdkGravity win_gravity;
};

/**
 * GdkSurfaceState:
 * @GDK_SURFACE_STATE_WITHDRAWN: the surface is not shown
 * @GDK_SURFACE_STATE_MINIMIZED: the surface is minimized
 * @GDK_SURFACE_STATE_MAXIMIZED: the surface is maximized
 * @GDK_SURFACE_STATE_STICKY: the surface is sticky
 * @GDK_SURFACE_STATE_FULLSCREEN: the surface is maximized without decorations
 * @GDK_SURFACE_STATE_ABOVE: the surface is kept above other surfaces
 * @GDK_SURFACE_STATE_BELOW: the surface is kept below other surfaces
 * @GDK_SURFACE_STATE_FOCUSED: the surface is presented as focused (with active decorations)
 * @GDK_SURFACE_STATE_TILED: the surface is in a tiled state
 * @GDK_SURFACE_STATE_TOP_TILED: whether the top edge is tiled
 * @GDK_SURFACE_STATE_TOP_RESIZABLE: whether the top edge is resizable
 * @GDK_SURFACE_STATE_RIGHT_TILED: whether the right edge is tiled
 * @GDK_SURFACE_STATE_RIGHT_RESIZABLE: whether the right edge is resizable
 * @GDK_SURFACE_STATE_BOTTOM_TILED: whether the bottom edge is tiled
 * @GDK_SURFACE_STATE_BOTTOM_RESIZABLE: whether the bottom edge is resizable
 * @GDK_SURFACE_STATE_LEFT_TILED: whether the left edge is tiled
 * @GDK_SURFACE_STATE_LEFT_RESIZABLE: whether the left edge is resizable
 *
 * Specifies the state of a toplevel surface.
 *
 * On platforms that support information about individual edges, the %GDK_SURFACE_STATE_TILED
 * state will be set whenever any of the individual tiled states is set. On platforms
 * that lack that support, the tiled state will give an indication of tiledness without
 * any of the per-edge states being set.
 */
typedef enum
{
  GDK_SURFACE_STATE_WITHDRAWN        = 1 << 0,
  GDK_SURFACE_STATE_MINIMIZED        = 1 << 1,
  GDK_SURFACE_STATE_MAXIMIZED        = 1 << 2,
  GDK_SURFACE_STATE_STICKY           = 1 << 3,
  GDK_SURFACE_STATE_FULLSCREEN       = 1 << 4,
  GDK_SURFACE_STATE_ABOVE            = 1 << 5,
  GDK_SURFACE_STATE_BELOW            = 1 << 6,
  GDK_SURFACE_STATE_FOCUSED          = 1 << 7,
  GDK_SURFACE_STATE_TILED            = 1 << 8,
  GDK_SURFACE_STATE_TOP_TILED        = 1 << 9,
  GDK_SURFACE_STATE_TOP_RESIZABLE    = 1 << 10,
  GDK_SURFACE_STATE_RIGHT_TILED      = 1 << 11,
  GDK_SURFACE_STATE_RIGHT_RESIZABLE  = 1 << 12,
  GDK_SURFACE_STATE_BOTTOM_TILED     = 1 << 13,
  GDK_SURFACE_STATE_BOTTOM_RESIZABLE = 1 << 14,
  GDK_SURFACE_STATE_LEFT_TILED       = 1 << 15,
  GDK_SURFACE_STATE_LEFT_RESIZABLE   = 1 << 16
} GdkSurfaceState;


typedef struct _GdkSurfaceClass GdkSurfaceClass;

#define GDK_TYPE_SURFACE              (gdk_surface_get_type ())
#define GDK_SURFACE(object)           (G_TYPE_CHECK_INSTANCE_CAST ((object), GDK_TYPE_SURFACE, GdkSurface))
#define GDK_SURFACE_CLASS(klass)      (G_TYPE_CHECK_CLASS_CAST ((klass), GDK_TYPE_SURFACE, GdkSurfaceClass))
#define GDK_IS_SURFACE(object)        (G_TYPE_CHECK_INSTANCE_TYPE ((object), GDK_TYPE_SURFACE))
#define GDK_IS_SURFACE_CLASS(klass)   (G_TYPE_CHECK_CLASS_TYPE ((klass), GDK_TYPE_SURFACE))
#define GDK_SURFACE_GET_CLASS(obj)    (G_TYPE_INSTANCE_GET_CLASS ((obj), GDK_TYPE_SURFACE, GdkSurfaceClass))


GDK_AVAILABLE_IN_ALL
GType         gdk_surface_get_type              (void) G_GNUC_CONST;
GDK_AVAILABLE_IN_ALL
GdkSurface *   gdk_surface_new_toplevel         (GdkDisplay    *display,
                                                 int            width,
                                                 int            height);
GDK_AVAILABLE_IN_ALL
GdkSurface *   gdk_surface_new_popup            (GdkSurface    *parent,
                                                 gboolean       autohide);

GDK_AVAILABLE_IN_ALL
void          gdk_surface_destroy               (GdkSurface     *surface);
GDK_AVAILABLE_IN_ALL
gboolean      gdk_surface_is_destroyed          (GdkSurface     *surface);

GDK_AVAILABLE_IN_ALL
GdkDisplay *  gdk_surface_get_display           (GdkSurface     *surface);
GDK_AVAILABLE_IN_ALL
void          gdk_surface_hide                  (GdkSurface     *surface);

GDK_AVAILABLE_IN_ALL
void          gdk_surface_set_input_region      (GdkSurface     *surface,
                                                 cairo_region_t *region);

GDK_AVAILABLE_IN_ALL
gboolean gdk_surface_is_viewable    (GdkSurface *surface);

GDK_AVAILABLE_IN_ALL
gboolean      gdk_surface_get_mapped   (GdkSurface *surface);

GDK_AVAILABLE_IN_ALL
void          gdk_surface_set_cursor     (GdkSurface      *surface,
                                          GdkCursor       *cursor);
GDK_AVAILABLE_IN_ALL
GdkCursor    *gdk_surface_get_cursor      (GdkSurface       *surface);
GDK_AVAILABLE_IN_ALL
void          gdk_surface_set_device_cursor (GdkSurface   *surface,
                                             GdkDevice     *device,
                                             GdkCursor     *cursor);
GDK_AVAILABLE_IN_ALL
GdkCursor    *gdk_surface_get_device_cursor (GdkSurface     *surface,
                                             GdkDevice     *device);
GDK_AVAILABLE_IN_ALL
int           gdk_surface_get_width       (GdkSurface       *surface);
GDK_AVAILABLE_IN_ALL
int           gdk_surface_get_height      (GdkSurface       *surface);
GDK_AVAILABLE_IN_ALL
gboolean gdk_surface_translate_coordinates (GdkSurface *from,
                                            GdkSurface *to,
                                            double     *x,
                                            double     *y);

GDK_AVAILABLE_IN_ALL
gint          gdk_surface_get_scale_factor  (GdkSurface     *surface);

GDK_AVAILABLE_IN_ALL
void          gdk_surface_get_device_position (GdkSurface      *surface,
                                               GdkDevice       *device,
                                               double          *x,
                                               double          *y,
                                               GdkModifierType *mask);

GDK_AVAILABLE_IN_ALL
cairo_surface_t *
              gdk_surface_create_similar_surface (GdkSurface *surface,
                                                  cairo_content_t  content,
                                                  int              width,
                                                  int              height);

GDK_AVAILABLE_IN_ALL
void          gdk_surface_beep            (GdkSurface       *surface);

GDK_AVAILABLE_IN_ALL
void gdk_surface_begin_resize_drag            (GdkSurface     *surface,
                                               GdkSurfaceEdge  edge,
                                               GdkDevice      *device,
                                               gint            button,
                                               gint            x,
                                               gint            y,
                                               guint32         timestamp);

GDK_AVAILABLE_IN_ALL
void gdk_surface_begin_move_drag              (GdkSurface     *surface,
                                               GdkDevice      *device,
                                               gint            button,
                                               gint            x,
                                               gint            y,
                                               guint32         timestamp);

GDK_AVAILABLE_IN_ALL
void       gdk_surface_queue_expose              (GdkSurface          *surface);

GDK_AVAILABLE_IN_ALL
void       gdk_surface_freeze_updates      (GdkSurface    *surface);
GDK_AVAILABLE_IN_ALL
void       gdk_surface_thaw_updates        (GdkSurface    *surface);

GDK_AVAILABLE_IN_ALL
void       gdk_surface_constrain_size      (GdkGeometry    *geometry,
                                            GdkSurfaceHints  flags,
                                            gint            width,
                                            gint            height,
                                            gint           *new_width,
                                            gint           *new_height);

GDK_AVAILABLE_IN_ALL
void       gdk_surface_set_support_multidevice (GdkSurface *surface,
                                                gboolean   support_multidevice);
GDK_AVAILABLE_IN_ALL
gboolean   gdk_surface_get_support_multidevice (GdkSurface *surface);

GDK_AVAILABLE_IN_ALL
GdkFrameClock* gdk_surface_get_frame_clock      (GdkSurface     *surface);

GDK_AVAILABLE_IN_ALL
void       gdk_surface_set_opaque_region        (GdkSurface      *surface,
                                                 cairo_region_t *region);

GDK_AVAILABLE_IN_ALL
void       gdk_surface_set_shadow_width         (GdkSurface      *surface,
                                                 gint            left,
                                                 gint            right,
                                                 gint            top,
                                                 gint            bottom);

GDK_AVAILABLE_IN_ALL
GdkCairoContext *gdk_surface_create_cairo_context(GdkSurface    *surface);
GDK_AVAILABLE_IN_ALL
GdkGLContext * gdk_surface_create_gl_context    (GdkSurface     *surface,
                                                 GError        **error);
GDK_AVAILABLE_IN_ALL
GdkVulkanContext *
               gdk_surface_create_vulkan_context(GdkSurface     *surface,
                                                 GError        **error);

G_DEFINE_AUTOPTR_CLEANUP_FUNC (GdkSurface, g_object_unref)

G_END_DECLS

#endif /* __GDK_SURFACE_H__ */