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mutter/clutter/win32/clutter-stage-win32.c
Chun-wei Fan c1fd29df7a Fix The Win32 Backend for Newer Visual Studio Versions 
The GetSystemMetrics() function returns wrong values for SM_CXSIZEFRAME,
SM_CYSIZEFRAME, SM_CXFIXEDFRAME and SM_CYFIXEDFRAME when built with Visual
Studio 2012 and 2013 (unless the XP compatibility setting for the
PlatformToolset entry is turned on), causing the window of Clutter programs
to automatically shrink to a point where they become unusable.

This patch uses AdjustWindowRectEx() for builds using Visual Studio 2012
and later, which deduces the required height and width of the Window
properly.  Unfortunately we can't use this for the VS 2008/2010 builds as
they cause the Window to continually expand as the program is run.

https://bugzilla.gnome.org/show_bug.cgi?id=725873
2014-03-08 18:35:50 +08:00

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/* Clutter.
* An OpenGL based 'interactive canvas' library.
* Authored By Matthew Allum <mallum@openedhand.com>
* Copyright (C) 2006-2007 OpenedHand
*
* 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/>.
*
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "clutter-backend-win32.h"
#include "clutter-stage-win32.h"
#include "clutter-win32.h"
#include "clutter-actor-private.h"
#include "clutter-main.h"
#include "clutter-feature.h"
#include "clutter-event.h"
#include "clutter-enum-types.h"
#include "clutter-private.h"
#include "clutter-debug.h"
#include "clutter-stage-private.h"
#include "cogl/cogl.h"
#include <windows.h>
static void clutter_stage_window_iface_init (ClutterStageWindowIface *iface);
enum
{
PROP_0,
PROP_BACKEND,
PROP_WRAPPER
};
G_DEFINE_TYPE_WITH_CODE (ClutterStageWin32,
clutter_stage_win32,
G_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE
(CLUTTER_TYPE_STAGE_WINDOW,
clutter_stage_window_iface_init));
static void
clutter_stage_win32_show (ClutterStageWindow *stage_window,
gboolean do_raise)
{
ClutterStageWin32 *stage_win32 = CLUTTER_STAGE_WIN32 (stage_window);
if (stage_win32->hwnd)
{
ShowWindow (stage_win32->hwnd, do_raise ? SW_SHOW : SW_SHOWNA);
if (stage_win32->accept_focus)
SetForegroundWindow (stage_win32->hwnd);
clutter_actor_map (CLUTTER_ACTOR (stage_win32->wrapper));
}
}
static void
clutter_stage_win32_hide (ClutterStageWindow *stage_window)
{
ClutterStageWin32 *stage_win32 = CLUTTER_STAGE_WIN32 (stage_window);
if (stage_win32->hwnd)
{
clutter_actor_unmap (CLUTTER_ACTOR (stage_win32->wrapper));
ShowWindow (stage_win32->hwnd, SW_HIDE);
}
}
static void
clutter_stage_win32_get_geometry (ClutterStageWindow *stage_window,
cairo_rectangle_int_t *geometry)
{
ClutterStageWin32 *stage_win32 = CLUTTER_STAGE_WIN32 (stage_window);
if (_clutter_stage_is_fullscreen (stage_win32->wrapper))
{
geometry->width = stage_win32->fullscreen_rect.right
- stage_win32->fullscreen_rect.left;
geometry->height = stage_win32->fullscreen_rect.bottom
- stage_win32->fullscreen_rect.top;
return;
}
geometry->width = stage_win32->win_width;
geometry->height = stage_win32->win_height;
}
static void
get_fullscreen_rect (ClutterStageWin32 *stage_win32)
{
HMONITOR monitor;
MONITORINFO monitor_info;
/* If we already have a window then try to use the same monitor that
is already on */
if (stage_win32->hwnd)
monitor = MonitorFromWindow (stage_win32->hwnd, MONITOR_DEFAULTTONEAREST);
else
{
/* Otherwise just guess that they will want the monitor where
the cursor is */
POINT cursor;
GetCursorPos (&cursor);
monitor = MonitorFromPoint (cursor, MONITOR_DEFAULTTONEAREST);
}
monitor_info.cbSize = sizeof (monitor_info);
GetMonitorInfoW (monitor, &monitor_info);
stage_win32->fullscreen_rect = monitor_info.rcMonitor;
}
static void
get_full_window_size (ClutterStageWin32 *stage_win32,
int width_in, int height_in,
int *width_out, int *height_out)
{
gboolean resizable
= clutter_stage_get_user_resizable (stage_win32->wrapper);
/* The window size passed to CreateWindow includes the window
decorations */
gint frame_width, frame_height;
#if !defined (_MSC_VER) || (_MSC_VER < 1700)
frame_width = GetSystemMetrics (resizable ? SM_CXSIZEFRAME : SM_CXFIXEDFRAME);
frame_height = GetSystemMetrics (resizable ? SM_CYSIZEFRAME : SM_CYFIXEDFRAME);
#else
/* MSVC 2012 and later returns wrong values from GetSystemMetrics()
* http://connect.microsoft.com/VisualStudio/feedback/details/753224/regression-getsystemmetrics-delivers-different-values
*
* For AdjustWindowRectEx(), it doesn't matter much whether the Window is resizble.
*/
RECT cxrect = {0, 0, 0, 0};
AdjustWindowRectEx (&cxrect, WS_POPUP | WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_THICKFRAME | WS_DLGFRAME, FALSE, 0);
frame_width = abs (cxrect.bottom);
frame_height = abs (cxrect.left);
#endif
*width_out = width_in + frame_width * 2;
*height_out = height_in + frame_height * 2 + GetSystemMetrics (SM_CYCAPTION);
}
void
_clutter_stage_win32_get_min_max_info (ClutterStageWin32 *stage_win32,
MINMAXINFO *min_max_info)
{
/* If the window isn't resizable then set the max and min size to
the current size */
if (!clutter_stage_get_user_resizable (CLUTTER_STAGE (stage_win32->wrapper)))
{
int full_width, full_height;
get_full_window_size (stage_win32,
stage_win32->win_width, stage_win32->win_height,
&full_width, &full_height);
min_max_info->ptMaxTrackSize.x = full_width;
min_max_info->ptMinTrackSize.x = full_width;
min_max_info->ptMaxTrackSize.y = full_height;
min_max_info->ptMinTrackSize.y = full_height;
}
}
static void
clutter_stage_win32_resize (ClutterStageWindow *stage_window,
gint width,
gint height)
{
ClutterStageWin32 *stage_win32 = CLUTTER_STAGE_WIN32 (stage_window);
gboolean resize;
resize = clutter_stage_get_user_resizable (stage_win32->wrapper);
if (width != stage_win32->win_width || height != stage_win32->win_height)
{
/* Ignore size requests if we are in full screen mode */
if (!_clutter_stage_is_fullscreen (stage_win32->wrapper))
{
stage_win32->win_width = width;
stage_win32->win_height = height;
if (stage_win32->hwnd != NULL && !stage_win32->is_foreign_win)
{
int full_width, full_height;
get_full_window_size (stage_win32,
width, height,
&full_width, &full_height);
SetWindowPos (stage_win32->hwnd, NULL,
0, 0,
full_width, full_height,
SWP_NOZORDER | SWP_NOMOVE);
}
}
}
}
static void
clutter_stage_win32_set_title (ClutterStageWindow *stage_window,
const gchar *title)
{
ClutterStageWin32 *stage_win32 = CLUTTER_STAGE_WIN32 (stage_window);
/* Empty window titles not allowed, so set it to just a period. */
if (title == NULL || !title[0])
title = ".";
if (stage_win32->wtitle != NULL)
g_free (stage_win32->wtitle);
stage_win32->wtitle = g_utf8_to_utf16 (title, -1, NULL, NULL, NULL);
/* If the window is not yet created, the title will be set during the
window creation */
if (stage_win32->hwnd != NULL)
SetWindowTextW (stage_win32->hwnd, stage_win32->wtitle);
}
void
_clutter_stage_win32_update_cursor (ClutterStageWin32 *stage_win32)
{
HCURSOR cursor;
if (stage_win32->is_cursor_visible)
cursor = (HCURSOR) GetClassLongPtrW (stage_win32->hwnd, GCLP_HCURSOR);
else
{
ClutterBackend *backend = clutter_get_default_backend ();
/* The documentation implies that we can just use
SetCursor(NULL) to get rid of the cursor but apparently this
doesn't work very well so instead we create an invisible
cursor */
cursor = _clutter_backend_win32_get_invisible_cursor (backend);
}
SetCursor (cursor);
}
static void
clutter_stage_win32_set_cursor_visible (ClutterStageWindow *stage_window,
gboolean cursor_visible)
{
ClutterStageWin32 *stage_win32 = CLUTTER_STAGE_WIN32 (stage_window);
if (stage_win32->is_cursor_visible != cursor_visible)
{
POINT cursor_pos;
RECT client_rect;
stage_win32->is_cursor_visible = cursor_visible;
/* If the cursor is already over the client area of the window
then we need to update it immediately */
GetCursorPos (&cursor_pos);
if (WindowFromPoint (cursor_pos) == stage_win32->hwnd &&
ScreenToClient (stage_win32->hwnd, &cursor_pos) &&
GetClientRect (stage_win32->hwnd, &client_rect) &&
cursor_pos.x >= client_rect.left &&
cursor_pos.y >= client_rect.top &&
cursor_pos.x < client_rect.right &&
cursor_pos.y < client_rect.bottom)
_clutter_stage_win32_update_cursor (stage_win32);
}
}
static LONG
get_requested_window_style (ClutterStageWin32 *stage_win32,
gboolean want_fullscreen)
{
ClutterStage *wrapper = stage_win32->wrapper;
/* Fullscreen mode shouldn't have any borders */
if (want_fullscreen)
return WS_POPUP;
/* Otherwise it's an overlapped window but if it isn't resizable
then it shouldn't have a thick frame */
else if (clutter_stage_get_user_resizable (wrapper))
return WS_OVERLAPPEDWINDOW;
else
return WS_OVERLAPPEDWINDOW & ~WS_THICKFRAME & ~WS_MAXIMIZEBOX;
}
static LONG
get_window_style (ClutterStageWin32 *stage_win32)
{
ClutterStage *wrapper = stage_win32->wrapper;
return get_requested_window_style (stage_win32,
_clutter_stage_is_fullscreen (wrapper));
}
static void
clutter_stage_win32_set_user_resize (ClutterStageWindow *stage_window,
gboolean value)
{
HWND hwnd = CLUTTER_STAGE_WIN32 (stage_window)->hwnd;
LONG old_style = GetWindowLongW (hwnd, GWL_STYLE);
/* Update the window style but preserve the visibility */
SetWindowLongW (hwnd, GWL_STYLE,
get_window_style (CLUTTER_STAGE_WIN32 (stage_window))
| (old_style & WS_VISIBLE));
/* Queue a redraw of the frame */
RedrawWindow (hwnd, NULL, NULL, RDW_FRAME | RDW_INVALIDATE);
}
static void
clutter_stage_win32_set_accept_focus (ClutterStageWindow *stage_window,
gboolean accept_focus)
{
ClutterStageWin32 *stage_win32 = CLUTTER_STAGE_WIN32 (stage_window);
accept_focus = !!accept_focus;
stage_win32->accept_focus = accept_focus;
}
static ClutterActor *
clutter_stage_win32_get_wrapper (ClutterStageWindow *stage_window)
{
return CLUTTER_ACTOR (CLUTTER_STAGE_WIN32 (stage_window)->wrapper);
}
static void
clutter_stage_win32_set_fullscreen (ClutterStageWindow *stage_window,
gboolean value)
{
ClutterStageWin32 *stage_win32 = CLUTTER_STAGE_WIN32 (stage_window);
HWND hwnd = CLUTTER_STAGE_WIN32 (stage_window)->hwnd;
LONG old_style = GetWindowLongW (hwnd, GWL_STYLE);
ClutterStageStateEvent event;
if (hwnd)
{
/* Update the window style but preserve the visibility */
SetWindowLongW (hwnd, GWL_STYLE,
get_requested_window_style (stage_win32, value)
| (old_style & WS_VISIBLE));
/* Update the window size */
if (value)
{
get_fullscreen_rect (stage_win32);
SetWindowPos (hwnd, HWND_TOP,
stage_win32->fullscreen_rect.left,
stage_win32->fullscreen_rect.top,
stage_win32->fullscreen_rect.right
- stage_win32->fullscreen_rect.left,
stage_win32->fullscreen_rect.bottom
- stage_win32->fullscreen_rect.top,
0);
}
else
{
int full_width, full_height;
get_full_window_size (stage_win32,
stage_win32->win_width,
stage_win32->win_height,
&full_width, &full_height);
SetWindowPos (stage_win32->hwnd, NULL,
0, 0,
full_width, full_height,
SWP_NOZORDER | SWP_NOMOVE);
}
}
/* Report the state change */
if (value)
{
_clutter_stage_update_state (stage_win32->wrapper,
0,
CLUTTER_STAGE_STATE_FULLSCREEN);
}
else
{
_clutter_stage_update_state (stage_win32->wrapper,
CLUTTER_STAGE_STATE_FULLSCREEN,
0);
}
}
static ATOM
clutter_stage_win32_get_window_class ()
{
static ATOM klass = 0;
if (klass == 0)
{
WNDCLASSW wndclass;
memset (&wndclass, 0, sizeof (wndclass));
wndclass.style = CS_DBLCLKS | CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc = _clutter_stage_win32_window_proc;
wndclass.cbWndExtra = sizeof (LONG_PTR);
wndclass.hInstance = GetModuleHandleW (NULL);
wndclass.hIcon = LoadIconW (NULL, (LPWSTR) IDI_APPLICATION);
wndclass.hCursor = LoadCursorW (NULL, (LPWSTR) IDC_ARROW);
wndclass.hbrBackground = NULL;
wndclass.lpszMenuName = NULL;
wndclass.lpszClassName = L"ClutterStageWin32";
klass = RegisterClassW (&wndclass);
}
return klass;
}
static gboolean
clutter_stage_win32_realize (ClutterStageWindow *stage_window)
{
ClutterStageWin32 *stage_win32 = CLUTTER_STAGE_WIN32 (stage_window);
ClutterBackend *backend;
ClutterBackendWin32 *backend_win32;
CoglFramebuffer *framebuffer;
gfloat width;
gfloat height;
GError *error = NULL;
CLUTTER_NOTE (MISC, "Realizing main stage");
backend = CLUTTER_BACKEND (stage_win32->backend);
backend_win32 = CLUTTER_BACKEND_WIN32 (backend);
clutter_actor_get_size (CLUTTER_ACTOR (stage_win32->wrapper),
&width, &height);
stage_win32->onscreen = cogl_onscreen_new (backend->cogl_context,
width, height);
if (stage_win32->hwnd == NULL)
{
ATOM window_class = clutter_stage_win32_get_window_class ();
int win_xpos, win_ypos, win_width, win_height;
if (window_class == 0)
{
g_critical ("Unable to register window class");
goto fail;
}
/* If we're in fullscreen mode then use the fullscreen rect
instead */
if (_clutter_stage_is_fullscreen (stage_win32->wrapper))
{
get_fullscreen_rect (stage_win32);
win_xpos = stage_win32->fullscreen_rect.left;
win_ypos = stage_win32->fullscreen_rect.top;
win_width = stage_win32->fullscreen_rect.right - win_xpos;
win_height = stage_win32->fullscreen_rect.bottom - win_ypos;
}
else
{
win_xpos = win_ypos = CW_USEDEFAULT;
get_full_window_size (stage_win32,
stage_win32->win_width,
stage_win32->win_height,
&win_width, &win_height);
}
if (stage_win32->wtitle == NULL)
stage_win32->wtitle = g_utf8_to_utf16 (".", -1, NULL, NULL, NULL);
stage_win32->hwnd = CreateWindowW ((LPWSTR) MAKEINTATOM (window_class),
stage_win32->wtitle,
get_window_style (stage_win32),
win_xpos,
win_ypos,
win_width,
win_height,
NULL, NULL,
GetModuleHandle (NULL),
NULL);
if (stage_win32->hwnd == NULL)
{
g_critical ("Unable to create stage window");
goto fail;
}
/* Store a pointer to the actor in the extra bytes of the window
so we can quickly access it in the window procedure */
SetWindowLongPtrW (stage_win32->hwnd, 0, (LONG_PTR) stage_win32);
}
cogl_win32_onscreen_set_foreign_window (stage_win32->onscreen,
stage_win32->hwnd);
cogl_onscreen_set_swap_throttled (stage_win32->onscreen,
_clutter_get_sync_to_vblank ());
framebuffer = COGL_FRAMEBUFFER (stage_win32->onscreen);
if (!cogl_framebuffer_allocate (framebuffer, &error))
{
g_warning ("Failed to allocate stage: %s", error->message);
g_error_free (error);
cogl_object_unref (stage_win32->onscreen);
stage_win32->onscreen = NULL;
goto fail;
}
/* Create a context. This will be a no-op if we already have one */
if (!_clutter_backend_create_context (CLUTTER_BACKEND (backend_win32),
&error))
{
g_critical ("Unable to realize stage: %s", error->message);
g_error_free (error);
goto fail;
}
CLUTTER_NOTE (BACKEND, "Successfully realized stage");
return TRUE;
fail:
return FALSE;
}
static void
clutter_stage_win32_unprepare_window (ClutterStageWin32 *stage_win32)
{
if (!stage_win32->is_foreign_win && stage_win32->hwnd)
{
/* Drop the pointer to this stage in the window so that any
further messages won't be processed. The stage might be being
destroyed so otherwise the messages would be handled with an
invalid stage instance */
SetWindowLongPtrW (stage_win32->hwnd, 0, (LONG_PTR) 0);
DestroyWindow (stage_win32->hwnd);
}
}
static void
clutter_stage_win32_unrealize (ClutterStageWindow *stage_window)
{
ClutterStageWin32 *stage_win32 = CLUTTER_STAGE_WIN32 (stage_window);
CLUTTER_NOTE (BACKEND, "Unrealizing stage");
clutter_stage_win32_unprepare_window (stage_win32);
}
static void
clutter_stage_win32_redraw (ClutterStageWindow *stage_window)
{
ClutterStageWin32 *stage_win32 = CLUTTER_STAGE_WIN32 (stage_window);
/* this will cause the stage implementation to be painted */
_clutter_stage_do_paint (stage_win32->wrapper, NULL);
cogl_flush ();
if (stage_win32->onscreen)
cogl_onscreen_swap_buffers (COGL_FRAMEBUFFER (stage_win32->onscreen));
}
static CoglFramebuffer *
clutter_stage_win32_get_active_framebuffer (ClutterStageWindow *stage_window)
{
ClutterStageWin32 *stage_win32 = CLUTTER_STAGE_WIN32 (stage_window);
return COGL_FRAMEBUFFER (stage_win32->onscreen);
}
static void
clutter_stage_win32_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterStageWin32 *self = CLUTTER_STAGE_WIN32 (gobject);
switch (prop_id)
{
case PROP_BACKEND:
self->backend = g_value_get_object (value);
break;
case PROP_WRAPPER:
self->wrapper = g_value_get_object (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
}
}
static void
clutter_stage_win32_dispose (GObject *gobject)
{
ClutterStageWin32 *stage_win32 = CLUTTER_STAGE_WIN32 (gobject);
/* Make sure that context and window are destroyed in case unrealize
* hasn't been called yet.
*/
if (stage_win32->hwnd)
clutter_stage_win32_unprepare_window (stage_win32);
if (stage_win32->wtitle)
{
g_free (stage_win32->wtitle);
stage_win32->wtitle = NULL;
}
G_OBJECT_CLASS (clutter_stage_win32_parent_class)->dispose (gobject);
}
static void
clutter_stage_win32_class_init (ClutterStageWin32Class *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->set_property = clutter_stage_win32_set_property;
gobject_class->dispose = clutter_stage_win32_dispose;
g_object_class_override_property (gobject_class, PROP_BACKEND, "backend");
g_object_class_override_property (gobject_class, PROP_WRAPPER, "wrapper");
}
static void
clutter_stage_win32_init (ClutterStageWin32 *stage)
{
stage->hwnd = NULL;
stage->win_width = 640;
stage->win_height = 480;
stage->backend = NULL;
stage->scroll_pos = 0;
stage->wtitle = NULL;
stage->wrapper = NULL;
stage->is_foreign_win = FALSE;
stage->is_cursor_visible = TRUE;
stage->accept_focus = TRUE;
}
static void
clutter_stage_window_iface_init (ClutterStageWindowIface *iface)
{
iface->get_wrapper = clutter_stage_win32_get_wrapper;
iface->set_title = clutter_stage_win32_set_title;
iface->set_fullscreen = clutter_stage_win32_set_fullscreen;
iface->set_cursor_visible = clutter_stage_win32_set_cursor_visible;
iface->set_user_resizable = clutter_stage_win32_set_user_resize;
iface->set_accept_focus = clutter_stage_win32_set_accept_focus;
iface->show = clutter_stage_win32_show;
iface->hide = clutter_stage_win32_hide;
iface->resize = clutter_stage_win32_resize;
iface->get_geometry = clutter_stage_win32_get_geometry;
iface->realize = clutter_stage_win32_realize;
iface->unrealize = clutter_stage_win32_unrealize;
iface->redraw = clutter_stage_win32_redraw;
iface->get_active_framebuffer = clutter_stage_win32_get_active_framebuffer;
}
/**
* clutter_win32_get_stage_window:
* @stage: a #ClutterStage
*
* Gets the stage's window handle
*
* Return value: An HWND for the stage window.
*
* Since: 0.8
*/
HWND
clutter_win32_get_stage_window (ClutterStage *stage)
{
ClutterStageWindow *impl;
g_return_val_if_fail (CLUTTER_IS_STAGE (stage), NULL);
impl = _clutter_stage_get_window (stage);
g_return_val_if_fail (CLUTTER_IS_STAGE_WIN32 (impl), NULL);
return CLUTTER_STAGE_WIN32 (impl)->hwnd;
}
/**
* clutter_win32_get_stage_from_window:
* @hwnd: a window handle
*
* Gets the stage for a particular window.
*
* Return value: The stage or NULL if a stage does not exist for the
* window.
*
* Since: 0.8
*/
ClutterStage *
clutter_win32_get_stage_from_window (HWND hwnd)
{
/* Check whether the window handle is an instance of the stage
window class */
if ((ATOM) GetClassLongPtrW (hwnd, GCW_ATOM)
== clutter_stage_win32_get_window_class ())
/* If it is there should be a pointer to the stage in the window
extra data */
return CLUTTER_STAGE_WIN32 (GetWindowLongPtrW (hwnd, 0))->wrapper;
else
{
/* Otherwise it might be a foreign window so we should check the
stage list */
ClutterStageManager *stage_manager;
const GSList *stages, *l;
stage_manager = clutter_stage_manager_get_default ();
stages = clutter_stage_manager_peek_stages (stage_manager);
for (l = stages; l != NULL; l = l->next)
{
ClutterStage *stage = l->data;
ClutterStageWindow *impl;
impl = _clutter_stage_get_window (stage);
g_assert (CLUTTER_IS_STAGE_WIN32 (impl));
if (CLUTTER_STAGE_WIN32 (impl)->hwnd == hwnd)
return stage;
}
}
return NULL;
}
typedef struct {
ClutterStageWin32 *stage_win32;
cairo_rectangle_int_t geom;
HWND hwnd;
guint destroy_old_hwnd : 1;
} ForeignWindowData;
static void
set_foreign_window_callback (ClutterActor *actor,
void *data)
{
ForeignWindowData *fwd = data;
CLUTTER_NOTE (BACKEND, "Setting foreign window (0x%x)",
(guint) fwd->hwnd);
if (fwd->destroy_old_hwnd && fwd->stage_win32->hwnd != NULL)
{
CLUTTER_NOTE (BACKEND, "Destroying previous window (0x%x)",
(guint) fwd->stage_win32->hwnd);
DestroyWindow (fwd->stage_win32->hwnd);
}
fwd->stage_win32->hwnd = fwd->hwnd;
fwd->stage_win32->is_foreign_win = TRUE;
fwd->stage_win32->win_width = fwd->geom.width;
fwd->stage_win32->win_height = fwd->geom.height;
clutter_actor_set_size (actor, fwd->geom.width, fwd->geom.height);
/* calling this with the stage unrealized will unset the stage
* from the GL context; once the stage is realized the GL context
* will be set again
*/
clutter_stage_ensure_current (CLUTTER_STAGE (actor));
}
/**
* clutter_win32_set_stage_foreign:
* @stage: a #ClutterStage
* @hwnd: an existing window handle
*
* Target the #ClutterStage to use an existing external window handle.
*
* Return value: %TRUE if foreign window is valid
*
* Since: 0.8
*/
gboolean
clutter_win32_set_stage_foreign (ClutterStage *stage,
HWND hwnd)
{
ClutterStageWin32 *stage_win32;
ClutterStageWindow *impl;
ClutterActor *actor;
RECT client_rect;
ForeignWindowData fwd;
g_return_val_if_fail (CLUTTER_IS_STAGE (stage), FALSE);
g_return_val_if_fail (hwnd != NULL, FALSE);
impl = _clutter_stage_get_window (stage);
if (!CLUTTER_IS_STAGE_WIN32 (impl))
{
g_critical ("The Clutter backend is not a Windows backend");
return FALSE;
}
stage_win32 = CLUTTER_STAGE_WIN32 (impl);
if (!GetClientRect (hwnd, &client_rect))
{
g_warning ("Unable to retrieve the new window geometry");
return FALSE;
}
fwd.stage_win32 = stage_win32;
fwd.hwnd = hwnd;
/* destroy the old HWND, if we have one and it's ours */
if (stage_win32->hwnd != NULL && !stage_win32->is_foreign_win)
fwd.destroy_old_hwnd = TRUE;
else
fwd.destroy_old_hwnd = FALSE;
fwd.geom.x = 0;
fwd.geom.y = 0;
fwd.geom.width = client_rect.right - client_rect.left;
fwd.geom.height = client_rect.bottom - client_rect.top;
actor = CLUTTER_ACTOR (stage);
_clutter_actor_rerealize (actor,
set_foreign_window_callback,
&fwd);
/* Queue a relayout - so the stage will be allocated the new
* window size.
*
* Note also that when the stage gets allocated the new
* window size that will result in the stage's
* priv->viewport being changed, which will in turn result
* in the Cogl viewport changing when _clutter_do_redraw
* calls _clutter_stage_maybe_setup_viewport().
*/
clutter_actor_queue_relayout (CLUTTER_ACTOR (stage));
return TRUE;
}
void
clutter_stage_win32_map (ClutterStageWin32 *stage_win32)
{
clutter_actor_map (CLUTTER_ACTOR (stage_win32->wrapper));
clutter_actor_queue_relayout (CLUTTER_ACTOR (stage_win32->wrapper));
}
void
clutter_stage_win32_unmap (ClutterStageWin32 *stage_win32)
{
clutter_actor_unmap (CLUTTER_ACTOR (stage_win32->wrapper));
}
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