gtk2/gdk/gdktypes.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_TYPES_H__
#define __GDK_TYPES_H__

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

/* GDK uses "glib". (And so does GTK).
 */
#include <glib.h>
#include <glib-object.h>
#include <gio/gio.h>
#include <cairo.h>
#include <pango/pango.h>

/* The system specific file gdkconfig.h contains such configuration
 * settings that are needed not only when compiling GDK (or GTK)
 * itself, but also occasionally when compiling programs that use GDK
 * (or GTK). One such setting is what windowing API backend is in use.
 */
#include <gdk/gdkconfig.h>

G_BEGIN_DECLS

/**
 * GDK_CURRENT_TIME:
 *
 * Represents the current time, and can be used anywhere a time is expected.
 */
#define GDK_CURRENT_TIME     0L

#ifdef __GI_SCANNER__
/* The introspection scanner is currently unable to lookup how
 * cairo_rectangle_int_t is actually defined. This prevents
 * introspection data for the GdkRectangle type to include fields
 * descriptions. To workaround this issue, we define it with the same
 * content as cairo_rectangle_int_t, but only under the introspection
 * define.
 */
struct _GdkRectangle
{
    int x, y;
    int width, height;
};
typedef struct _GdkRectangle          GdkRectangle;
#else
typedef cairo_rectangle_int_t         GdkRectangle;
#endif

/* Forward declarations of commonly used types */
typedef struct _GdkRGBA               GdkRGBA;
typedef struct _GdkContentFormats     GdkContentFormats;
typedef struct _GdkContentProvider    GdkContentProvider;
typedef struct _GdkCursor             GdkCursor;
typedef struct _GdkTexture            GdkTexture;
typedef struct _GdkDevice             GdkDevice;
typedef struct _GdkDrag               GdkDrag;
typedef struct _GdkDrop               GdkDrop;

typedef struct _GdkClipboard          GdkClipboard;
typedef struct _GdkDisplayManager     GdkDisplayManager;
typedef struct _GdkDisplay            GdkDisplay;
typedef struct _GdkSurface             GdkSurface;
typedef struct _GdkAppLaunchContext   GdkAppLaunchContext;
typedef struct _GdkSeat               GdkSeat;
typedef struct _GdkSnapshot           GdkSnapshot;

typedef struct _GdkDrawContext        GdkDrawContext;
typedef struct _GdkCairoContext       GdkCairoContext;
typedef struct _GdkGLContext          GdkGLContext;
typedef struct _GdkVulkanContext      GdkVulkanContext;

/* Currently, these are the same values numerically as in the
 * X protocol. If you change that, gdksurface-x11.c/gdk_surface_set_geometry_hints()
 * will need fixing.
 */
/**
 * GdkGravity:
 * @GDK_GRAVITY_NORTH_WEST: the reference point is at the top left corner.
 * @GDK_GRAVITY_NORTH: the reference point is in the middle of the top edge.
 * @GDK_GRAVITY_NORTH_EAST: the reference point is at the top right corner.
 * @GDK_GRAVITY_WEST: the reference point is at the middle of the left edge.
 * @GDK_GRAVITY_CENTER: the reference point is at the center of the surface.
 * @GDK_GRAVITY_EAST: the reference point is at the middle of the right edge.
 * @GDK_GRAVITY_SOUTH_WEST: the reference point is at the lower left corner.
 * @GDK_GRAVITY_SOUTH: the reference point is at the middle of the lower edge.
 * @GDK_GRAVITY_SOUTH_EAST: the reference point is at the lower right corner.
 * @GDK_GRAVITY_STATIC: the reference point is at the top left corner of the
 *  surface itself, ignoring window manager decorations.
 *
 * Defines the reference point of a surface and is used in `GdkPopupLayout`.
 */
typedef enum
{
  GDK_GRAVITY_NORTH_WEST = 1,
  GDK_GRAVITY_NORTH,
  GDK_GRAVITY_NORTH_EAST,
  GDK_GRAVITY_WEST,
  GDK_GRAVITY_CENTER,
  GDK_GRAVITY_EAST,
  GDK_GRAVITY_SOUTH_WEST,
  GDK_GRAVITY_SOUTH,
  GDK_GRAVITY_SOUTH_EAST,
  GDK_GRAVITY_STATIC
} GdkGravity;

/* Types of modifiers.
 */
/**
 * GdkModifierType:
 * @GDK_SHIFT_MASK: the Shift key.
 * @GDK_LOCK_MASK: a Lock key (depending on the modifier mapping of the
 *  X server this may either be CapsLock or ShiftLock).
 * @GDK_CONTROL_MASK: the Control key.
 * @GDK_ALT_MASK: the fourth modifier key (it depends on the modifier
 *  mapping of the X server which key is interpreted as this modifier, but
 *  normally it is the Alt key).
 * @GDK_BUTTON1_MASK: the first mouse button.
 * @GDK_BUTTON2_MASK: the second mouse button.
 * @GDK_BUTTON3_MASK: the third mouse button.
 * @GDK_BUTTON4_MASK: the fourth mouse button.
 * @GDK_BUTTON5_MASK: the fifth mouse button.
 * @GDK_SUPER_MASK: the Super modifier
 * @GDK_HYPER_MASK: the Hyper modifier
 * @GDK_META_MASK: the Meta modifier
 *
 * Flags to indicate the state of modifier keys and mouse buttons
 * in events.
 *
 * Typical modifier keys are Shift, Control, Meta, Super, Hyper, Alt, Compose,
 * Apple, CapsLock or ShiftLock.
 *
 * Note that GDK may add internal values to events which include values outside
 * of this enumeration. Your code should preserve and ignore them.  You can use
 * %GDK_MODIFIER_MASK to remove all private values.
 */
typedef enum
{
  GDK_SHIFT_MASK    = 1 << 0,
  GDK_LOCK_MASK     = 1 << 1,
  GDK_CONTROL_MASK  = 1 << 2,
  GDK_ALT_MASK      = 1 << 3,

  GDK_BUTTON1_MASK  = 1 << 8,
  GDK_BUTTON2_MASK  = 1 << 9,
  GDK_BUTTON3_MASK  = 1 << 10,
  GDK_BUTTON4_MASK  = 1 << 11,
  GDK_BUTTON5_MASK  = 1 << 12,

  GDK_SUPER_MASK    = 1 << 26,
  GDK_HYPER_MASK    = 1 << 27,
  GDK_META_MASK     = 1 << 28,
} GdkModifierType;


/**
 * GDK_MODIFIER_MASK:
 *
 * A mask covering all entries in `GdkModifierType`.
 */
#define GDK_MODIFIER_MASK (GDK_SHIFT_MASK|GDK_LOCK_MASK|GDK_CONTROL_MASK| \
                           GDK_ALT_MASK|GDK_SUPER_MASK|GDK_HYPER_MASK|GDK_META_MASK| \
                           GDK_BUTTON1_MASK|GDK_BUTTON2_MASK|GDK_BUTTON3_MASK| \
                           GDK_BUTTON4_MASK|GDK_BUTTON5_MASK)


/**
 * GdkGLError:
 * @GDK_GL_ERROR_NOT_AVAILABLE: OpenGL support is not available
 * @GDK_GL_ERROR_UNSUPPORTED_FORMAT: The requested visual format is not supported
 * @GDK_GL_ERROR_UNSUPPORTED_PROFILE: The requested profile is not supported
 * @GDK_GL_ERROR_COMPILATION_FAILED: The shader compilation failed
 * @GDK_GL_ERROR_LINK_FAILED: The shader linking failed
 *
 * Error enumeration for `GdkGLContext`.
 */
typedef enum {
  GDK_GL_ERROR_NOT_AVAILABLE,
  GDK_GL_ERROR_UNSUPPORTED_FORMAT,
  GDK_GL_ERROR_UNSUPPORTED_PROFILE,
  GDK_GL_ERROR_COMPILATION_FAILED,
  GDK_GL_ERROR_LINK_FAILED
} GdkGLError;

/**
 * GdkVulkanError:
 * @GDK_VULKAN_ERROR_UNSUPPORTED: Vulkan is not supported on this backend or has not been
 *   compiled in.
 * @GDK_VULKAN_ERROR_NOT_AVAILABLE: Vulkan support is not available on this Surface
 *
 * Error enumeration for `GdkVulkanContext`.
 */
typedef enum {
  GDK_VULKAN_ERROR_UNSUPPORTED,
  GDK_VULKAN_ERROR_NOT_AVAILABLE,
} GdkVulkanError;

/**
 * GdkAxisUse:
 * @GDK_AXIS_IGNORE: the axis is ignored.
 * @GDK_AXIS_X: the axis is used as the x axis.
 * @GDK_AXIS_Y: the axis is used as the y axis.
 * @GDK_AXIS_DELTA_X: the axis is used as the scroll x delta
 * @GDK_AXIS_DELTA_Y: the axis is used as the scroll y delta
 * @GDK_AXIS_PRESSURE: the axis is used for pressure information.
 * @GDK_AXIS_XTILT: the axis is used for x tilt information.
 * @GDK_AXIS_YTILT: the axis is used for y tilt information.
 * @GDK_AXIS_WHEEL: the axis is used for wheel information.
 * @GDK_AXIS_DISTANCE: the axis is used for pen/tablet distance information
 * @GDK_AXIS_ROTATION: the axis is used for pen rotation information
 * @GDK_AXIS_SLIDER: the axis is used for pen slider information
 * @GDK_AXIS_LAST: a constant equal to the numerically highest axis value.
 *
 * Defines how device axes are interpreted by GTK.
 *
 * Note that the X and Y axes are not really needed; pointer devices
 * report their location via the x/y members of events regardless. Whether
 * X and Y are present as axes depends on the GDK backend.
 */
typedef enum
{
  GDK_AXIS_IGNORE,
  GDK_AXIS_X,
  GDK_AXIS_Y,
  GDK_AXIS_DELTA_X,
  GDK_AXIS_DELTA_Y,
  GDK_AXIS_PRESSURE,
  GDK_AXIS_XTILT,
  GDK_AXIS_YTILT,
  GDK_AXIS_WHEEL,
  GDK_AXIS_DISTANCE,
  GDK_AXIS_ROTATION,
  GDK_AXIS_SLIDER,
  GDK_AXIS_LAST
} GdkAxisUse;

/**
 * GdkAxisFlags:
 * @GDK_AXIS_FLAG_X: X axis is present
 * @GDK_AXIS_FLAG_Y: Y axis is present
 * @GDK_AXIS_FLAG_DELTA_X: Scroll X delta axis is present
 * @GDK_AXIS_FLAG_DELTA_Y: Scroll Y delta axis is present
 * @GDK_AXIS_FLAG_PRESSURE: Pressure axis is present
 * @GDK_AXIS_FLAG_XTILT: X tilt axis is present
 * @GDK_AXIS_FLAG_YTILT: Y tilt axis is present
 * @GDK_AXIS_FLAG_WHEEL: Wheel axis is present
 * @GDK_AXIS_FLAG_DISTANCE: Distance axis is present
 * @GDK_AXIS_FLAG_ROTATION: Z-axis rotation is present
 * @GDK_AXIS_FLAG_SLIDER: Slider axis is present
 *
 * Flags describing the current capabilities of a device/tool.
 */
typedef enum
{
  GDK_AXIS_FLAG_X        = 1 << GDK_AXIS_X,
  GDK_AXIS_FLAG_Y        = 1 << GDK_AXIS_Y,
  GDK_AXIS_FLAG_DELTA_X  = 1 << GDK_AXIS_DELTA_X,
  GDK_AXIS_FLAG_DELTA_Y  = 1 << GDK_AXIS_DELTA_Y,
  GDK_AXIS_FLAG_PRESSURE = 1 << GDK_AXIS_PRESSURE,
  GDK_AXIS_FLAG_XTILT    = 1 << GDK_AXIS_XTILT,
  GDK_AXIS_FLAG_YTILT    = 1 << GDK_AXIS_YTILT,
  GDK_AXIS_FLAG_WHEEL    = 1 << GDK_AXIS_WHEEL,
  GDK_AXIS_FLAG_DISTANCE = 1 << GDK_AXIS_DISTANCE,
  GDK_AXIS_FLAG_ROTATION = 1 << GDK_AXIS_ROTATION,
  GDK_AXIS_FLAG_SLIDER   = 1 << GDK_AXIS_SLIDER,
} GdkAxisFlags;

/**
 * GdkDragAction:
 * @GDK_ACTION_COPY: Copy the data.
 * @GDK_ACTION_MOVE: Move the data, i.e. first copy it, then delete
 *   it from the source using the DELETE target of the X selection protocol.
 * @GDK_ACTION_LINK: Add a link to the data. Note that this is only
 *   useful if source and destination agree on what it means, and is not
 *   supported on all platforms.
 * @GDK_ACTION_ASK: Ask the user what to do with the data.
 *
 * Used in `GdkDrop` and `GdkDrag` to indicate the actions that the
 * destination can and should do with the dropped data.
 */
typedef enum
{
  GDK_ACTION_COPY    = 1 << 0,
  GDK_ACTION_MOVE    = 1 << 1,
  GDK_ACTION_LINK    = 1 << 2,
  GDK_ACTION_ASK     = 1 << 3
} GdkDragAction;

/**
 * GDK_ACTION_ALL:
 *
 * Defines all possible DND actions.
 *
 * This can be used in [method@Gdk.Drop.status] messages when any drop
 * can be accepted or a more specific drop method is not yet known.
 */
#define GDK_ACTION_ALL (GDK_ACTION_COPY | GDK_ACTION_MOVE | GDK_ACTION_LINK)

/**
 * GdkMemoryFormat:
 * @GDK_MEMORY_B8G8R8A8_PREMULTIPLIED: 4 bytes; for blue, green, red, alpha.
 *   The color values are premultiplied with the alpha value.
 * @GDK_MEMORY_A8R8G8B8_PREMULTIPLIED: 4 bytes; for alpha, red, green, blue.
 *   The color values are premultiplied with the alpha value.
 * @GDK_MEMORY_R8G8B8A8_PREMULTIPLIED: 4 bytes; for red, green, blue, alpha
 *   The color values are premultiplied with the alpha value.
 * @GDK_MEMORY_B8G8R8A8: 4 bytes; for blue, green, red, alpha.
 * @GDK_MEMORY_A8R8G8B8: 4 bytes; for alpha, red, green, blue.
 * @GDK_MEMORY_R8G8B8A8: 4 bytes; for red, green, blue, alpha.
 * @GDK_MEMORY_A8B8G8R8: 4 bytes; for alpha, blue, green, red.
 * @GDK_MEMORY_R8G8B8: 3 bytes; for red, green, blue. The data is opaque.
 * @GDK_MEMORY_B8G8R8: 3 bytes; for blue, green, red. The data is opaque.
 * @GDK_MEMORY_R16G16B16: 3 guint16 values; for red, green, blue. Since: 4.6
 * @GDK_MEMORY_R16G16B16A16_PREMULTIPLIED: 4 guint16 values; for red, green,
 *   blue, alpha. The color values are premultiplied with the alpha value.
 *  Since: 4.6
 * @GDK_MEMORY_R16G16B16A16: 4 guint16 values; for red, green, blue, alpha.
 *  Since: 4.6
 * @GDK_MEMORY_R16G16B16_FLOAT: 3 half-float values; for red, green, blue.
 *   The data is opaque. Since: 4.6
 * @GDK_MEMORY_R16G16B16A16_FLOAT_PREMULTIPLIED: 4 half-float values; for
 *   red, green, blue and alpha. The color values are premultiplied with
 *   the alpha value. Since: 4.6
 * @GDK_MEMORY_R16G16B16A16_FLOAT: 4 half-float values; for red, green,
 *   blue and alpha. Since: 4.6
 * @GDK_MEMORY_B32G32R32_FLOAT: 3 float values; for blue, green, red.
 *   The data is opaque. Since: 4.6
 * @GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED: 4 float values; for
 *   red, green, blue and alpha. The color values are premultiplied with
 *   the alpha value. Since: 4.6
 * @GDK_MEMORY_R32G32B32A32_FLOAT: 4 float values; for red, green, blue and
 *   alpha. Since: 4.6
 * @GDK_MEMORY_N_FORMATS: The number of formats. This value will change as
 *   more formats get added, so do not rely on its concrete integer.
 *
 * `GdkMemoryFormat` describes formats that image data can have in memory.
 *
 * It describes formats by listing the contents of the memory passed to it.
 * So GDK_MEMORY_A8R8G8B8 will be 1 byte (8 bits) of alpha, followed by a
 * byte each of red, green and blue. It is not endian-dependent, so
 * CAIRO_FORMAT_ARGB32 is represented by different `GdkMemoryFormats`
 * on architectures with different endiannesses.
 *
 * Its naming is modelled after
 * [VkFormat](https://www.khronos.org/registry/vulkan/specs/1.0/html/vkspec.html#VkFormat)
 * for details).
 */
typedef enum {
  GDK_MEMORY_B8G8R8A8_PREMULTIPLIED,
  GDK_MEMORY_A8R8G8B8_PREMULTIPLIED,
  GDK_MEMORY_R8G8B8A8_PREMULTIPLIED,
  GDK_MEMORY_B8G8R8A8,
  GDK_MEMORY_A8R8G8B8,
  GDK_MEMORY_R8G8B8A8,
  GDK_MEMORY_A8B8G8R8,
  GDK_MEMORY_R8G8B8,
  GDK_MEMORY_B8G8R8,
  GDK_MEMORY_R16G16B16,
  GDK_MEMORY_R16G16B16A16_PREMULTIPLIED,
  GDK_MEMORY_R16G16B16A16,
  GDK_MEMORY_R16G16B16_FLOAT,
  GDK_MEMORY_R16G16B16A16_FLOAT_PREMULTIPLIED,
  GDK_MEMORY_R16G16B16A16_FLOAT,
  GDK_MEMORY_R32G32B32_FLOAT,
  GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED,
  GDK_MEMORY_R32G32B32A32_FLOAT,

  GDK_MEMORY_N_FORMATS
} GdkMemoryFormat;

/*
 * GDK_DECLARE_INTERNAL_TYPE:
 * @ModuleObjName: The name of the new type, in camel case (like GtkWidget)
 * @module_obj_name: The name of the new type in lowercase, with words
 *  separated by '_' (like 'gtk_widget')
 * @MODULE: The name of the module, in all caps (like 'GTK')
 * @OBJ_NAME: The bare name of the type, in all caps (like 'WIDGET')
 * @ParentName: the name of the parent type, in camel case (like GtkWidget)
 *
 * A convenience macro for emitting the usual declarations in the
 * header file for a type which is intended to be subclassed only
 * by internal consumers.
 *
 * This macro differs from %G_DECLARE_DERIVABLE_TYPE and %G_DECLARE_FINAL_TYPE
 * by declaring a type that is only derivable internally. Internal users can
 * derive this type, assuming they have access to the instance and class
 * structures; external users will not be able to subclass this type.
 */
#define GDK_DECLARE_INTERNAL_TYPE(ModuleObjName, module_obj_name, MODULE, OBJ_NAME, ParentName) \
  GType module_obj_name##_get_type (void);                                                               \
  G_GNUC_BEGIN_IGNORE_DEPRECATIONS                                                                       \
  typedef struct _##ModuleObjName ModuleObjName;                                                         \
  typedef struct _##ModuleObjName##Class ModuleObjName##Class;                                           \
                                                                                                         \
  _GLIB_DEFINE_AUTOPTR_CHAINUP (ModuleObjName, ParentName)                                               \
  G_DEFINE_AUTOPTR_CLEANUP_FUNC (ModuleObjName##Class, g_type_class_unref)                               \
                                                                                                         \
  G_GNUC_UNUSED static inline ModuleObjName * MODULE##_##OBJ_NAME (gpointer ptr) {                       \
    return G_TYPE_CHECK_INSTANCE_CAST (ptr, module_obj_name##_get_type (), ModuleObjName); }             \
  G_GNUC_UNUSED static inline ModuleObjName##Class * MODULE##_##OBJ_NAME##_CLASS (gpointer ptr) {        \
    return G_TYPE_CHECK_CLASS_CAST (ptr, module_obj_name##_get_type (), ModuleObjName##Class); }         \
  G_GNUC_UNUSED static inline gboolean MODULE##_IS_##OBJ_NAME (gpointer ptr) {                           \
    return G_TYPE_CHECK_INSTANCE_TYPE (ptr, module_obj_name##_get_type ()); }                            \
  G_GNUC_UNUSED static inline gboolean MODULE##_IS_##OBJ_NAME##_CLASS (gpointer ptr) {                   \
    return G_TYPE_CHECK_CLASS_TYPE (ptr, module_obj_name##_get_type ()); }                               \
  G_GNUC_UNUSED static inline ModuleObjName##Class * MODULE##_##OBJ_NAME##_GET_CLASS (gpointer ptr) {    \
    return G_TYPE_INSTANCE_GET_CLASS (ptr, module_obj_name##_get_type (), ModuleObjName##Class); }       \
  G_GNUC_END_IGNORE_DEPRECATIONS

typedef struct _GdkKeymapKey GdkKeymapKey;

/**
 * GdkKeymapKey:
 * @keycode: the hardware keycode. This is an identifying number for a
 *   physical key.
 * @group: indicates movement in a horizontal direction. Usually groups are used
 *   for two different languages. In group 0, a key might have two English
 *   characters, and in group 1 it might have two Hebrew characters. The Hebrew
 *   characters will be printed on the key next to the English characters.
 * @level: indicates which symbol on the key will be used, in a vertical direction.
 *   So on a standard US keyboard, the key with the number “1” on it also has the
 *   exclamation point ("!") character on it. The level indicates whether to use
 *   the “1” or the “!” symbol. The letter keys are considered to have a lowercase
 *   letter at level 0, and an uppercase letter at level 1, though only the
 *   uppercase letter is printed.
 *
 * A `GdkKeymapKey` is a hardware key that can be mapped to a keyval.
 */
struct _GdkKeymapKey
{
  guint keycode;
  int   group;
  int   level;
};


G_END_DECLS