mutter/clutter/win32/clutter-stage-win32.c
Neil Roberts 1a263dca5c 2008-03-30 Neil Roberts <neil@o-hand.com>
* clutter/win32/clutter-win32.h: 
	* clutter/win32/clutter-stage-win32.h: 
	* clutter/win32/clutter-stage-win32.c: 
	* clutter/win32/clutter-event-win32.c: 
	* clutter/win32/clutter-backend-win32.h: 
	* clutter/win32/clutter-backend-win32.c:
	Upgraded for multi-stage support.

	* clutter/win32/clutter-stage-win32.c
	(clutter_stage_win32_request_coords): Fixed so that it doesn't set
	the position or size if it hasn't changed. This was causing
	problems when the window was resized using the top left corner. In
	that case the window receives resize and move messages separately
	which caused the window to flash at a different size or position
	while one message was handled before the other.
	(clutter_stage_win32_realize): Added PFD_GENERIC_ACCELERATED to
	the list of pixel format flags to force it to use hardware
	acceleration.

2008-03-30  Neil Roberts  <neil@o-hand.com>

	* clutter-sections.txt: Added clutter_win32_get_stage_from_window
2008-03-30 16:51:01 +00:00

645 lines
19 KiB
C

/* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "clutter-backend-win32.h"
#include "clutter-stage-win32.h"
#include "clutter-win32.h"
#include "../clutter-main.h"
#include "../clutter-feature.h"
#include "../clutter-color.h"
#include "../clutter-util.h"
#include "../clutter-event.h"
#include "../clutter-enum-types.h"
#include "../clutter-private.h"
#include "../clutter-debug.h"
#include "../clutter-units.h"
#include "../clutter-stage.h"
#include "cogl.h"
#include <windows.h>
G_DEFINE_TYPE (ClutterStageWin32, clutter_stage_win32, CLUTTER_TYPE_STAGE);
static void
clutter_stage_win32_show (ClutterActor *actor)
{
ClutterStageWin32 *stage_win32 = CLUTTER_STAGE_WIN32 (actor);
if (stage_win32->hwnd)
ShowWindow (stage_win32->hwnd, SW_SHOW);
/* chain up */
CLUTTER_ACTOR_CLASS (clutter_stage_win32_parent_class)->show (actor);
}
static void
clutter_stage_win32_hide (ClutterActor *actor)
{
ClutterStageWin32 *stage_win32 = CLUTTER_STAGE_WIN32 (actor);
if (stage_win32->hwnd)
ShowWindow (stage_win32->hwnd, SW_HIDE);
/* chain up */
CLUTTER_ACTOR_CLASS (clutter_stage_win32_parent_class)->hide (actor);
}
static void
clutter_stage_win32_query_coords (ClutterActor *self,
ClutterActorBox *box)
{
ClutterStageWin32 *stage_win32 = CLUTTER_STAGE_WIN32 (self);
/* If we're in fullscreen mode then return the size of the screen
instead */
if ((stage_win32->state & CLUTTER_STAGE_STATE_FULLSCREEN))
{
box->x1 = CLUTTER_UNITS_FROM_INT (stage_win32->fullscreen_rect.left);
box->y1 = CLUTTER_UNITS_FROM_INT (stage_win32->fullscreen_rect.top);
box->x2 = CLUTTER_UNITS_FROM_INT (stage_win32->fullscreen_rect.right);
box->y2 = CLUTTER_UNITS_FROM_INT (stage_win32->fullscreen_rect.bottom);
}
else
{
box->x1 = CLUTTER_UNITS_FROM_INT (stage_win32->win_xpos);
box->y1 = CLUTTER_UNITS_FROM_INT (stage_win32->win_ypos);
box->x2 = box->x1 + CLUTTER_UNITS_FROM_INT (stage_win32->win_width);
box->y2 = box->y1 + CLUTTER_UNITS_FROM_INT (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_pos (ClutterStageWin32 *stage_win32,
int xpos_in, int ypos_in,
int *xpos_out, int *ypos_out)
{
gboolean resizable
= clutter_stage_get_user_resizable (CLUTTER_STAGE (stage_win32));
/* The window position passed to CreateWindow includes the window
decorations */
*xpos_out = xpos_in - GetSystemMetrics (resizable ? SM_CXSIZEFRAME
: SM_CXFIXEDFRAME);
*ypos_out = ypos_in - GetSystemMetrics (resizable ? SM_CYSIZEFRAME
: SM_CYFIXEDFRAME)
- GetSystemMetrics (SM_CYCAPTION);
}
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 (CLUTTER_STAGE (stage_win32));
/* The window size passed to CreateWindow includes the window
decorations */
*width_out = width_in + GetSystemMetrics (resizable ? SM_CXSIZEFRAME
: SM_CXFIXEDFRAME) * 2;
*height_out = height_in + GetSystemMetrics (resizable ? SM_CYSIZEFRAME
: SM_CYFIXEDFRAME) * 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)))
{
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_request_coords (ClutterActor *self,
ClutterActorBox *box)
{
ClutterStageWin32 *stage_win32 = CLUTTER_STAGE_WIN32 (self);
gint new_xpos, new_ypos, new_width, new_height;
int change_flags = SWP_NOZORDER | SWP_NOSIZE | SWP_NOMOVE;
new_xpos = CLUTTER_UNITS_TO_INT (MIN (box->x1, box->x2));
new_ypos = CLUTTER_UNITS_TO_INT (MIN (box->y1, box->y2));
new_width = ABS (CLUTTER_UNITS_TO_INT (box->x2 - box->x1));
new_height = ABS (CLUTTER_UNITS_TO_INT (box->y2 - box->y1));
if (new_width != stage_win32->win_width
|| new_height != stage_win32->win_height)
change_flags &= ~SWP_NOSIZE;
if (new_xpos != stage_win32->win_xpos
|| new_ypos != stage_win32->win_ypos)
change_flags &= ~SWP_NOMOVE;
if ((change_flags & (SWP_NOSIZE | SWP_NOMOVE)) != (SWP_NOSIZE | SWP_NOMOVE)
/* Ignore size requests if we are in full screen mode */
&& (stage_win32->state & CLUTTER_STAGE_STATE_FULLSCREEN) == 0)
{
stage_win32->win_xpos = new_xpos;
stage_win32->win_ypos = new_ypos;
stage_win32->win_width = new_width;
stage_win32->win_height = new_height;
if (stage_win32->hwnd != NULL)
{
int full_xpos, full_ypos, full_width, full_height;
get_full_window_pos (stage_win32,
new_xpos, new_ypos,
&full_xpos, &full_ypos);
get_full_window_size (stage_win32,
new_width, new_height,
&full_width, &full_height);
SetWindowPos (stage_win32->hwnd, NULL,
full_xpos, full_ypos,
full_width, full_height,
change_flags);
}
CLUTTER_SET_PRIVATE_FLAGS (self, CLUTTER_ACTOR_SYNC_MATRICES);
}
CLUTTER_ACTOR_CLASS (clutter_stage_win32_parent_class)
->request_coords (self, box);
}
static void
clutter_stage_win32_set_title (ClutterStage *stage,
const gchar *title)
{
ClutterStageWin32 *stage_win32 = CLUTTER_STAGE_WIN32 (stage);
wchar_t *wtitle;
/* Empty window titles not allowed, so set it to just a period. */
if (title == NULL || !title[0])
title = ".";
wtitle = g_utf8_to_utf16 (title, -1, NULL, NULL, NULL);
SetWindowTextW (stage_win32->hwnd, wtitle);
g_free (wtitle);
}
static LONG
get_window_style (ClutterStageWin32 *stage_win32)
{
/* Fullscreen mode shouldn't have any borders */
if ((stage_win32->state & CLUTTER_STAGE_STATE_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 (CLUTTER_STAGE (stage_win32)))
return WS_OVERLAPPEDWINDOW;
else
return WS_OVERLAPPEDWINDOW & ~WS_THICKFRAME;
}
static void
clutter_stage_win32_set_user_resize (ClutterStage *stage,
gboolean value)
{
HWND hwnd = CLUTTER_STAGE_WIN32 (stage)->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))
| (old_style & WS_VISIBLE));
}
static void
clutter_stage_win32_set_fullscreen (ClutterStage *stage,
gboolean value)
{
ClutterStageWin32 *stage_win32 = CLUTTER_STAGE_WIN32 (stage);
HWND hwnd = CLUTTER_STAGE_WIN32 (stage)->hwnd;
LONG old_style = GetWindowLongW (hwnd, GWL_STYLE);
ClutterStageStateEvent event;
if (value)
stage_win32->state |= CLUTTER_STAGE_STATE_FULLSCREEN;
else
stage_win32->state &= ~CLUTTER_STAGE_STATE_FULLSCREEN;
if (hwnd)
{
/* Update the window style but preserve the visibility */
SetWindowLongW (hwnd, GWL_STYLE,
get_window_style (stage_win32)
| (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_xpos, full_ypos, full_width, full_height;
get_full_window_pos (stage_win32,
stage_win32->win_xpos,
stage_win32->win_ypos,
&full_xpos, &full_ypos);
get_full_window_size (stage_win32,
stage_win32->win_width,
stage_win32->win_height,
&full_width, &full_height);
SetWindowPos (stage_win32->hwnd, NULL,
full_xpos, full_ypos,
full_width, full_height,
SWP_NOZORDER);
}
CLUTTER_SET_PRIVATE_FLAGS (stage, CLUTTER_ACTOR_SYNC_MATRICES);
}
/* Report the state change */
memset (&event, 0, sizeof (event));
event.type = CLUTTER_STAGE_STATE;
event.stage = CLUTTER_STAGE (stage_win32);
event.new_state = stage_win32->state;
event.changed_mask = CLUTTER_STAGE_STATE_FULLSCREEN;
clutter_event_put ((ClutterEvent *) &event);
}
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_check_gl_version ()
{
const char *version_string, *major_end, *minor_end;
int major = 0, minor = 0;
/* Get the OpenGL version number */
if ((version_string = (const char *) glGetString (GL_VERSION)) == NULL)
return FALSE;
/* Extract the major number */
for (major_end = version_string; *major_end >= '0'
&& *major_end <= '9'; major_end++)
major = (major * 10) + *major_end - '0';
/* If there were no digits or the major number isn't followed by a
dot then it is invalid */
if (major_end == version_string || *major_end != '.')
return FALSE;
/* Extract the minor number */
for (minor_end = major_end + 1; *minor_end >= '0'
&& *minor_end <= '9'; minor_end++)
minor = (minor * 10) + *minor_end - '0';
/* If there were no digits or there is an unexpected character then
it is invalid */
if (minor_end == major_end + 1
|| (*minor_end && *minor_end != ' ' && *minor_end != '.'))
return FALSE;
/* Accept OpenGL 1.2 or later */
return major > 1 || (major == 1 && minor >= 2);
}
static void
clutter_stage_win32_realize (ClutterActor *actor)
{
ClutterStageWin32 *stage_win32 = CLUTTER_STAGE_WIN32 (actor);
ClutterBackendWin32 *backend_win32;
PIXELFORMATDESCRIPTOR pfd;
int pf;
CLUTTER_NOTE (MISC, "Realizing main stage");
backend_win32 = CLUTTER_BACKEND_WIN32 (clutter_get_default_backend ());
if (stage_win32->hwnd == NULL)
{
ATOM window_class = clutter_stage_win32_get_window_class ();
int win_xpos, win_ypos, win_width, win_height;
RECT win_rect;
POINT actual_pos;
if (window_class == 0)
{
g_critical ("Unable to register window class");
CLUTTER_ACTOR_UNSET_FLAGS (actor, CLUTTER_ACTOR_REALIZED);
return;
}
/* If we're in fullscreen mode then use the fullscreen rect
instead */
if ((stage_win32->state & CLUTTER_STAGE_STATE_FULLSCREEN))
{
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.left - win_ypos;
}
else
{
if (stage_win32->win_xpos == 0 && stage_win32->win_ypos == 0)
win_xpos = win_ypos = CW_USEDEFAULT;
else
get_full_window_pos (stage_win32,
stage_win32->win_xpos, stage_win32->win_ypos,
&win_xpos, &win_ypos);
get_full_window_size (stage_win32,
stage_win32->win_width,
stage_win32->win_height,
&win_width, &win_height);
}
stage_win32->hwnd = CreateWindowW ((LPWSTR) MAKEINTATOM (window_class),
L".",
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");
CLUTTER_ACTOR_UNSET_FLAGS (actor, CLUTTER_ACTOR_REALIZED);
return;
}
/* Get the position in case CW_USEDEFAULT was specified */
if ((stage_win32->state & CLUTTER_STAGE_STATE_FULLSCREEN) == 0)
{
GetClientRect (stage_win32->hwnd, &win_rect);
actual_pos.x = win_rect.left;
actual_pos.y = win_rect.top;
ClientToScreen (stage_win32->hwnd, &actual_pos);
stage_win32->win_xpos = actual_pos.x;
stage_win32->win_ypos = actual_pos.y;
}
/* 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);
}
if (stage_win32->client_dc)
ReleaseDC (stage_win32->hwnd, stage_win32->client_dc);
stage_win32->client_dc = GetDC (stage_win32->hwnd);
memset (&pfd, 0, sizeof (pfd));
pfd.nSize = sizeof (pfd);
pfd.nVersion = 1;
pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL
| PFD_DOUBLEBUFFER | PFD_GENERIC_ACCELERATED;
pfd.iPixelType = PFD_TYPE_RGBA;
pfd.cColorBits = 24;
pfd.cAlphaBits = 8;
pfd.cDepthBits = 32;
pfd.cStencilBits = 8;
pfd.iLayerType = PFD_MAIN_PLANE;
if ((pf = ChoosePixelFormat (stage_win32->client_dc, &pfd)) == 0
|| !SetPixelFormat (stage_win32->client_dc, pf, &pfd))
{
g_critical ("Unable to find suitable GL pixel format");
CLUTTER_ACTOR_UNSET_FLAGS (actor, CLUTTER_ACTOR_REALIZED);
return;
}
if (backend_win32->gl_context == NULL)
{
backend_win32->gl_context = wglCreateContext (stage_win32->client_dc);
if (backend_win32->gl_context == NULL)
{
g_critical ("Unable to create suitable GL context");
CLUTTER_ACTOR_UNSET_FLAGS (actor, CLUTTER_ACTOR_REALIZED);
return;
}
}
CLUTTER_NOTE (GL, "wglMakeCurrent");
clutter_stage_ensure_current (CLUTTER_STAGE (stage_win32));
if (!clutter_stage_win32_check_gl_version ())
{
g_critical ("OpenGL version number is too low");
CLUTTER_ACTOR_UNSET_FLAGS (actor, CLUTTER_ACTOR_REALIZED);
return;
}
/* Make sure the viewport gets set up correctly */
CLUTTER_SET_PRIVATE_FLAGS (actor, CLUTTER_ACTOR_SYNC_MATRICES);
}
static void
clutter_stage_win32_unrealize (ClutterActor *actor)
{
ClutterStageWin32 *stage_win32 = CLUTTER_STAGE_WIN32 (actor);
wglMakeCurrent (NULL, NULL);
if (stage_win32->client_dc)
{
ReleaseDC (stage_win32->hwnd, stage_win32->client_dc);
stage_win32->client_dc = NULL;
}
if (stage_win32->hwnd)
{
DestroyWindow (stage_win32->hwnd);
stage_win32->hwnd = NULL;
}
}
static void
clutter_stage_win32_dispose (GObject *gobject)
{
ClutterStageWin32 *stage_win32 = CLUTTER_STAGE_WIN32 (gobject);
if (stage_win32->hwnd)
clutter_actor_unrealize (CLUTTER_ACTOR (gobject));
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);
ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
ClutterStageClass *stage_class = CLUTTER_STAGE_CLASS (klass);
gobject_class->dispose = clutter_stage_win32_dispose;
actor_class->show = clutter_stage_win32_show;
actor_class->hide = clutter_stage_win32_hide;
actor_class->request_coords = clutter_stage_win32_request_coords;
actor_class->query_coords = clutter_stage_win32_query_coords;
actor_class->realize = clutter_stage_win32_realize;
actor_class->unrealize = clutter_stage_win32_unrealize;
stage_class->set_title = clutter_stage_win32_set_title;
stage_class->set_user_resize = clutter_stage_win32_set_user_resize;
stage_class->set_fullscreen = clutter_stage_win32_set_fullscreen;
}
static void
clutter_stage_win32_init (ClutterStageWin32 *stage)
{
stage->hwnd = NULL;
stage->client_dc = NULL;
stage->win_xpos = 0;
stage->win_ypos = 0;
stage->win_width = 640;
stage->win_height = 480;
stage->backend = NULL;
stage->scroll_pos = 0;
}
/**
* 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)
{
g_return_val_if_fail (CLUTTER_IS_STAGE_WIN32 (stage), NULL);
return CLUTTER_STAGE_WIN32 (stage)->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 (ClutterStage *) GetWindowLongPtrW (hwnd, 0);
else
return NULL;
}
void
clutter_stage_win32_map (ClutterStageWin32 *stage_win32)
{
CLUTTER_ACTOR_SET_FLAGS (stage_win32, CLUTTER_ACTOR_MAPPED);
clutter_actor_queue_redraw (CLUTTER_ACTOR (stage_win32));
}
void
clutter_stage_win32_unmap (ClutterStageWin32 *stage_win32)
{
CLUTTER_ACTOR_UNSET_FLAGS (stage_win32, CLUTTER_ACTOR_MAPPED);
}