[目次] (https://qiita.com/Yutaka_Aoki/items/9d38ea98406f4096435b)
Inside Wine; surface
surface が存在するかどうか
結論
surface が存在するかどうかは、以下の関数で決定されている。この関数内で、surface != NULL になった場合、__wine_set_visible_region() は、その中から呼び出される dibdrv_set_window_surface() の内部にて、PHYSDEV dev を struct windrv_physdev *wnd_dev にし、ドライバーの関数セットを window_driver にする。詳細は、もう一度、ずっと下の方で述べる。
略して紹介:
~/wine/dlls/user32/painting.c
static void update_visible_region( struct dce *dce )
{
struct window_surface *surface = NULL;
/* 中略 */
/* don't use a surface to paint the client area of OpenGL windows */
if (!(paint_flags & SET_WINPOS_PIXEL_FORMAT) || (flags & DCX_WINDOW)) {
win = WIN_GetPtr( top_win );
if (win && win != WND_DESKTOP && win != WND_OTHER_PROCESS) {
surface = win->surface;
if (surface) window_surface_add_ref( surface );
WIN_ReleasePtr( win );
}
}
if (!surface) top_rect = get_virtual_screen_rect();
/*
以下の関数は、
a. surface == NULL の時は、「デフォルト」のままなので、
1. PHYSDEV dev の指す実体は、X11DRV_PDEVICE 型とする。
2. 関数セットであるところの、dev->funcs を &x11drv_funcs とする。
b. surface != NULL の時は、
デフォルトに関数群をオーバーライドするように（追加的に）、
3. PHYSDEV dev の指す実体を struct windrv_physdev 型にする。
4. 関数セットであるところの、dev->funcs を &window_driver で
「オーバーライド」する。
*/
__wine_set_visible_region( dce->hdc, vis_rgn, &win_rect, &top_rect, surface );
if (surface) window_surface_release( surface );
}
ここで、win->surface について、実験とソース解析の両方の見地から、多くの場合に当てはまることを述べておく。それは、
HWND hwnd = (自分の HWND);
WND *my_win = WIN_GetPtr( hwnd );
の時
my_win->surface != NULL : hwnd の親が Desktop Window の場合
(自分が Desktop に浮いている時)
my_win->surface == NULL : hwnd の親が Desktop Window でない場合
(自分が 他のウィンドウの子ウィンドウの時)
ということである。update_visible_region() においては、
WND *win;
/* 中略 */
HWND top_win;
win = WIN_GetPtr( top_win );
となっている。「top_win」は、名前から推定すると、自分の親のうち、Desktop Window を親とするような（画面に浮いているような）Window であるはずである。それと、上記の win->surface の話とを合わせれば、「必ず」win->surface != NULL と考えて「大体」正しい。
だから、update_visible_region() を見ての結論は、自分が Desktop に浮いている場合は、surface == NULL であり、逆に、そうではなくて、別の Window の中に入っている場合(=子ウィンドウ)には、surface != NULL になるということである。
そして、surface != NULL の場合の、surface の値は、最も外側の Window ( = Desktop に浮いている Window ) が同じであれば、共通になるということである。まとめると、こんな感じになる :
| 自分の親 | surface | my_win->surface | win |
|---|---|---|---|
| Desktop | NULL | 非NULL | == my_win |
| 非Desktop | win->surface(非NULL) | NULL | != my_win |
struct window_surface
~/wine/include/wine/gdi_driver.h
/* support for window surfaces */
struct window_surface;
struct window_surface_funcs {
void (*lock)( struct window_surface *surface );
void (*unlock)( struct window_surface *surface );
void* (*get_info)( struct window_surface *surface, BITMAPINFO *info );
RECT* (*get_bounds)( struct window_surface *surface );
void (*set_region)( struct window_surface *surface, HRGN region );
void (*flush)( struct window_surface *surface );
void (*destroy)( struct window_surface *surface );
};
struct window_surface {
const struct window_surface_funcs *funcs; /* driver-specific implementations */
struct list entry; /* entry in global list managed by user32 */
LONG ref; /* reference count */
RECT rect; /* constant, no locking needed */
/* driver-specific fields here */
};
struct x11drv_window_surface : struct window_surface を継承
~/wine/dlls/winex11.drv/bitblt.c
struct x11drv_window_surface {
struct window_surface header;
Window window;
GC gc;
XImage *image;
RECT bounds;
BOOL byteswap;
BOOL is_argb;
DWORD alpha_bits;
COLORREF color_key;
HRGN region;
void *bits;
#ifdef HAVE_LIBXXSHM
XShmSegmentInfo shminfo;
#endif
CRITICAL_SECTION crit;
BITMAPINFO info; /* variable size, must be last */
};
surface データの相互関係
- struct x11drv_window_surface は、先頭に struct window_surface そのものを、
header という名称のメンバとして持っている。だから、キャストすると、互いに移りあえる。 - struct x11drv_win_data は、struct window_surface へのポインタを持っている。
- struct windrv_physdev は、struct window_surface へのポインタを持っている。
struct window_surface の動的型判定
WINE は、C 言語で書かれていて、C++ 言語ではないので、言語レベルでは「継承」の概念はない。しかし、struct window_surface と struct x11drv_window_surface の関係は、継承の概念と考えることが出来る。struct window_surface の「継承後の本当の型」は、struct x11drv_window_surface 以外に、struct android_window_surface や struct macdrv_window_surface がある。
継承後の型は、概念的には、以下のような関数で判定できる。ただし、x11drv_surface_funcs, android_surface_funcs, macdrv_surface_funcs は、全てそれぞれの環境用の、*.c ファイルの中で static 宣言されているので、他の *.c ファイルからは参照できない。そのため以下の関数は「擬似関数」であって、実際にコンパイルする事は出来ない。
ただし、x11(Linux), android, mac の違いは、かなりグローバルな話なので、おそらく絶対にどこかのグローバル変数か、マクロ定義によって、判断が付くはず。それよりも、struct window_surface が必ず継承されて使用されているかの方を調査する必要がある。
擬似関数
int __get_type_of_surface( struct window_surface *p_window_surface )
{
if ( p_window_surface->funcs == &x11drv_surface_funcs ) {
// *p_window_surface は、struct x11drv_window_surface 型である。
return 1;
}
else if ( p_window_surface->funcs == &android_surface_funcs ) {
// *p_window_surface は、struct android_window_surface 型である。
return 2;
}
else if ( p_window_surface->funcs == &macdrv_surface_funcs ) {
// *p_window_surface は、struct macdrv_window_surface 型である。
return 3;
}
else {
// 多分、有り得ない :
return 0;
}
}
struct window_surface から struct x11drv_window_surface の取得法
変換関数
struct window_surface から、struct x11drv_window_surface を取得するのは、関数 get_x11_surface() で行える。ただし、実際にやっている事は、「キャスト」するだけである。なぜなら、既に述べたように、後者は、前者を先頭部分に「含んでいる」ためである。これは、既に述べたように、C++ でいうところの、継承クラスと基本クラスの関係に他ならない。
~/wine/dlls/winex11.drv/bitblt.c
static struct x11drv_window_surface *get_x11_surface( struct window_surface *surface )
{
return (struct x11drv_window_surface *)surface;
}
実際に使われている例
~/wine/dlls/winex11.drv/bitblt.c
static void x11drv_surface_flush( struct window_surface *window_surface )
{
struct x11drv_window_surface *surface = get_x11_surface( window_surface );
unsigned char *src = surface->bits;
unsigned char *dst = (unsigned char *)surface->image->data;
struct window_surface の作成
~/wine/dlls/user32/winpos.c の set_window_pos() の中で、
- USER_Driver->pWindowPosChanging() : X11DRV_WindowPosChanging
- SERVER_START_REQ( set_window_pos ), wine_server_call
- USER_Driver->pWindowPosChanged() : X11DRV_WindowPosChanged
の順序で呼び出される。
X11DRV_WindowPosChanging() の中で、get_surface_rect で求めた surface_rect を引数にして、create_surface() が呼び出される：
*surface = create_surface( data->whole_window, &data->vis, &surface_rect, key, FALSE );
ここの部分は、X11DRV_WindowPosChanging の最後の引数の
( ・・・, struct window_surface **surface )
に対して書き込みを行っていることになる。
// 本質部分を抜粋 :
~/wine/dlls/user32/winpos.c
BOOL set_window_pos( HWND hwnd, HWND insert_after,
UINT swp_flags,
const RECT *window_rect,
const RECT *client_rect,
const RECT *valid_rects )
{
WND *win;
struct window_surface *old_surface, *new_surface = NULL;
visible_rect = *window_rect;
USER_Driver->pWindowPosChanging( hwnd, insert_after, swp_flags,
window_rect, client_rect, &visible_rect,
&new_surface );
win = WIN_GetPtr( hwnd )
SERVER_START_REQ( set_window_pos ) {
wine_server_call( req );
win->surface = new_surface;
}
USER_Driver->pWindowPosChanged( hwnd, insert_after, swp_flags,
window_rect, client_rect, &visible_rect,
valid_rects,
new_surface );
}
~/wine/dlls/winex11.drv/window.c
void CDECL X11DRV_WindowPosChanged( HWND hwnd, HWND insert_after,
UINT swp_flags,
const RECT *rectWindow,
const RECT *rectClient,
const RECT *visible_rect,
const RECT *valid_rects,
struct window_surface *surface )
{
/*中略*/
if (data->vis.visualid == default_visual.visualid) {
if (surface) window_surface_add_ref( surface );
if (data->surface) window_surface_release( data->surface );
data->surface = surface;
}
/*中略*/
}
~/wine/dlls/winex11.drv/window.c
static inline BOOL get_surface_rect( const RECT *visible_rect, RECT *surface_rect )
{
*surface_rect = get_virtual_screen_rect();
if (!IntersectRect( surface_rect, surface_rect, visible_rect )) return FALSE;
OffsetRect( surface_rect, -visible_rect->left, -visible_rect->top );
surface_rect->left &= ~31;
surface_rect->top &= ~31;
surface_rect->right = max( surface_rect->left + 32, (surface_rect->right + 31) & ~31 );
surface_rect->bottom = max( surface_rect->top + 32, (surface_rect->bottom + 31) & ~31 );
return TRUE;
}
~/wine/dlls/winex11.drv/window.c
struct window_surface *create_surface( Window window, const XVisualInfo *vis, const RECT *rect,
COLORREF color_key, BOOL use_alpha )
{
const XPixmapFormatValues *format = pixmap_formats[vis->depth];
struct x11drv_window_surface *surface;
int width = rect->right - rect->left, height = rect->bottom - rect->top;
int colors = format->bits_per_pixel <= 8 ? 1 << format->bits_per_pixel : 3;
surface = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY,
FIELD_OFFSET( struct x11drv_window_surface, info.bmiColors[colors] ));
if (!surface) return NULL;
surface->info.bmiHeader.biSize = sizeof(surface->info.bmiHeader);
surface->info.bmiHeader.biWidth = width;
surface->info.bmiHeader.biHeight = -height; /* top-down */
surface->info.bmiHeader.biPlanes = 1;
surface->info.bmiHeader.biBitCount = format->bits_per_pixel;
surface->info.bmiHeader.biSizeImage = get_dib_image_size( &surface->info );
set_color_info( vis, &surface->info, use_alpha );
InitializeCriticalSection( &surface->crit );
surface->crit.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": surface");
surface->header.funcs = &x11drv_surface_funcs;
surface->header.rect = *rect;
surface->header.ref = 1;
surface->window = window;
surface->is_argb = (use_alpha && vis->depth == 32 && surface->info.bmiHeader.biCompression == BI_RGB);
set_color_key( surface, color_key );
reset_bounds( &surface->bounds );
#ifdef HAVE_LIBXXSHM
surface->image = create_shm_image( vis, width, height, &surface->shminfo );
if (!surface->image)
#endif
{
surface->image = XCreateImage( gdi_display, vis->visual, vis->depth, ZPixmap, 0, NULL,
width, height, 32, 0 );
if (!surface->image) goto failed;
surface->image->data = HeapAlloc( GetProcessHeap(), 0, surface->info.bmiHeader.biSizeImage );
if (!surface->image->data) goto failed;
}
surface->gc = XCreateGC( gdi_display, window, 0, NULL );
XSetSubwindowMode( gdi_display, surface->gc, IncludeInferiors );
surface->byteswap = image_needs_byteswap( surface->image, is_r8g8b8(vis), format->bits_per_pixel );
if (vis->depth == 32 && !surface->is_argb)
surface->alpha_bits = ~(vis->red_mask | vis->green_mask | vis->blue_mask);
if (surface->byteswap || format->bits_per_pixel == 4 || format->bits_per_pixel == 8)
{
/* allocate separate surface bits if byte swapping or palette mapping is required */
if (!(surface->bits = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY,
surface->info.bmiHeader.biSizeImage )))
goto failed;
}
else surface->bits = surface->image->data;
TRACE( "created %p for %lx %s bits %p-%p image %p\n", surface, window, wine_dbgstr_rect(rect),
surface->bits, (char *)surface->bits + surface->info.bmiHeader.biSizeImage,
surface->image->data );
return &surface->header;
failed:
x11drv_surface_destroy( &surface->header );
return NULL;
}
HWND から struct x11drv_window_surface を取得する方法
(X Window 上で動いていて、かつ、HWND の Window が surface を持っているときに限定)
HWND hwnd = xxxx; // 入力
struct x11drv_win_data *data = get_win_data( hwnd );
struct window_surface *p_wnd_surface = data->surface;
struct x11drv_window_surface *surface = get_x11_surface( p_wnd_surface );
HDC から struct x11drv_window_surface を取得する方法
実際に使うには、条件を満たしているかをあらかじめ知っている方が良い。ただし、条件が何なのかは今のところよく分かってない。以下の関数では、動的型判定を用いている。以下は、「pLineTo」を介しての場合。
(window_driver は、外部から参照できない。)
独自関数
struct x11drv_window_surface __get_x11_wnd_surface_of_hdc( HDC hdc )
{
DC *dc = get_dc_ptr( hdc );
//update_dc( dc );
PHYSDEV dev = GET_DC_PHYSDEV( dc, pLineTo );
x11drv_window_surface *surface = NULL;
if ( dev->funcs == &window_driver ) {
// dev が struct windrv_physdev * 型である場合 :
struct windrv_physdev *p_wnd_physdev = get_windrv_physdev( dev );
struct window_surface *p_wnd_surface = p_wnd_physdev->surface;
if ( p_wnd_surface != NULL ) {
surface = get_x11_surface( p_wnd_surface );
}
}
release_dc_ptr( dc );
return surface;
}
surface が存在するかどうか
Win32 で描画系の全ての始まりは、HDC を取得することから。
Win32 で描画系 API を使用する際、全ては、HDC を取得することから始まる。
典型的な API としてよく使われる以下の関数達は、内部で、GetDCEx() を呼び出す :
1. HDC WINAPI GetDC( HWND hwnd );
2. HDC WINAPI GetWindowDC( HWND hwnd );
3. HDC WINAPI BeginPaint( HWND hwnd, PAINTSTRUCT *lps );
BeginPaint() については
BeginPaint()
-->send_erase()
-->GetDCEx()
の順になる。
では、肝心の GetDCEx() はどうなってるか。
[c:~/wine/dlls/user32/painting.c]
の GetDCEx() から始まる関数列
HDC WINAPI GetDCEx( HWND hwnd, HRGN hrgnClip, DWORD flags )
--> update_visible_region()
--> __wine_set_visible_region()
--> dibdrv_set_window_surface( DC *dc, struct window_surface *surface )
-->
if ( surface != NULL ) {
call window_driver.pCreateDC( &dc->physDev, NULL, NULL, NULL, NULL )
--> windrv_CreateDC()
--> push_dc_driver( dev, &physdev->dev, &window_driver );
--> ドライバーの関数セットが window_driver になる。
}
windrv_CreateDC()
~/wine/dlls/gdi32/dibdrv/dc.c
static BOOL windrv_CreateDC( PHYSDEV *dev, LPCWSTR driver, LPCWSTR device,
LPCWSTR output, const DEVMODEW *devmode )
{
struct windrv_physdev *physdev = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*physdev) );
if (!physdev) return FALSE;
if (!dib_driver.pCreateDC( dev, NULL, NULL, NULL, NULL ))
{
HeapFree( GetProcessHeap(), 0, physdev );
return FALSE;
}
physdev->dibdrv = get_dibdrv_pdev( *dev );
push_dc_driver( dev, &physdev->dev, &window_driver );
return TRUE;
}
update_visible_region()
略さずに全掲載 :
~/wine/dlls/user32/painting.c
/***********************************************************************
* update_visible_region
*
* Set the visible region and X11 drawable for the DC associated to
* a given window.
*/
static void update_visible_region( struct dce *dce )
{
struct window_surface *surface = NULL;
NTSTATUS status;
HRGN vis_rgn = 0;
HWND top_win = 0;
DWORD flags = dce->flags;
DWORD paint_flags = 0;
size_t size = 256;
RECT win_rect, top_rect;
WND *win;
/* don't clip siblings if using parent clip region */
if (flags & DCX_PARENTCLIP) flags &= ~DCX_CLIPSIBLINGS;
/* fetch the visible region from the server */
do
{
RGNDATA *data = HeapAlloc( GetProcessHeap(), 0, sizeof(*data) + size - 1 );
if (!data) return;
SERVER_START_REQ( get_visible_region )
{
req->window = wine_server_user_handle( dce->hwnd );
req->flags = flags;
wine_server_set_reply( req, data->Buffer, size );
if (!(status = wine_server_call( req )))
{
size_t reply_size = wine_server_reply_size( reply );
data->rdh.dwSize = sizeof(data->rdh);
data->rdh.iType = RDH_RECTANGLES;
data->rdh.nCount = reply_size / sizeof(RECT);
data->rdh.nRgnSize = reply_size;
vis_rgn = ExtCreateRegion( NULL, data->rdh.dwSize + data->rdh.nRgnSize, data );
top_win = wine_server_ptr_handle( reply->top_win );
win_rect.left = reply->win_rect.left;
win_rect.top = reply->win_rect.top;
win_rect.right = reply->win_rect.right;
win_rect.bottom = reply->win_rect.bottom;
top_rect.left = reply->top_rect.left;
top_rect.top = reply->top_rect.top;
top_rect.right = reply->top_rect.right;
top_rect.bottom = reply->top_rect.bottom;
paint_flags = reply->paint_flags;
}
else size = reply->total_size;
}
SERVER_END_REQ;
HeapFree( GetProcessHeap(), 0, data );
} while (status == STATUS_BUFFER_OVERFLOW);
if (status || !vis_rgn) return;
USER_Driver->pGetDC( dce->hdc, dce->hwnd, top_win, &win_rect, &top_rect, flags );
if (dce->clip_rgn) CombineRgn( vis_rgn, vis_rgn, dce->clip_rgn,
(flags & DCX_INTERSECTRGN) ? RGN_AND : RGN_DIFF );
/* don't use a surface to paint the client area of OpenGL windows */
if (!(paint_flags & SET_WINPOS_PIXEL_FORMAT) || (flags & DCX_WINDOW))
{
win = WIN_GetPtr( top_win );
if (win && win != WND_DESKTOP && win != WND_OTHER_PROCESS)
{
surface = win->surface;
if (surface) window_surface_add_ref( surface );
WIN_ReleasePtr( win );
}
}
if (!surface) top_rect = get_virtual_screen_rect();
__wine_set_visible_region( dce->hdc, vis_rgn, &win_rect, &top_rect, surface );
if (surface) window_surface_release( surface );
}
dibdrv_set_window_surface()
略さずに全掲載 :
~/wine/dlls/gdi32/dibdrv/dc.c
void dibdrv_set_window_surface( DC *dc, struct window_surface *surface )
{
char buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
BITMAPINFO *info = (BITMAPINFO *)buffer;
RECT rect;
void *bits;
PHYSDEV windev;
struct windrv_physdev *physdev;
struct dibdrv_physdev *dibdrv;
TRACE( "%p %p\n", dc->hSelf, surface );
windev = pop_dc_driver( dc, &window_driver );
if (surface)
{
if (windev) push_dc_driver( &dc->physDev, windev, windev->funcs );
else
{
if (!window_driver.pCreateDC( &dc->physDev, NULL, NULL, NULL, NULL )) return;
windev = find_dc_driver( dc, &window_driver );
}
physdev = get_windrv_physdev( windev );
window_surface_add_ref( surface );
if (physdev->surface) window_surface_release( physdev->surface );
physdev->surface = surface;
dibdrv = physdev->dibdrv;
bits = surface->funcs->get_info( surface, info );
init_dib_info_from_bitmapinfo( &dibdrv->dib, info, bits );
/* clip the device rect to the surface */
rect = surface->rect;
offset_rect( &rect, dc->device_rect.left, dc->device_rect.top );
intersect_rect( &dc->device_rect, &dc->device_rect, &rect );
dibdrv->dib.rect = dc->vis_rect;
offset_rect( &dibdrv->dib.rect, -rect.left, -rect.top );
dibdrv->bounds = surface->funcs->get_bounds( surface );
DC_InitDC( dc );
}
else if (windev)
{
dib_driver.pDeleteDC( pop_dc_driver( dc, &dib_driver ));
windev->funcs->pDeleteDC( windev );
DC_InitDC( dc );
}
}
__wine_set_visible_region()
略さずに全掲載 :
~/wine/dlls/gdi32/clipping.c
void CDECL __wine_set_visible_region( HDC hdc, HRGN hrgn, const RECT *vis_rect, const RECT *device_rect,
struct window_surface *surface )
{
DC * dc;
if (!(dc = get_dc_ptr( hdc ))) return;
TRACE( "%p %p %s %s %p\n", hdc, hrgn,
wine_dbgstr_rect(vis_rect), wine_dbgstr_rect(device_rect), surface );
/* map region to DC coordinates */
OffsetRgn( hrgn, -vis_rect->left, -vis_rect->top );
if (dc->hVisRgn) DeleteObject( dc->hVisRgn );
dc->dirty = 0;
dc->vis_rect = *vis_rect;
dc->device_rect = *device_rect;
dc->hVisRgn = hrgn;
dibdrv_set_window_surface( dc, surface );
DC_UpdateXforms( dc );
update_dc_clipping( dc );
release_dc_ptr( dc );
}
set_window_pos()
略さずに全掲載 :
~/wine/dlls/user32/winpos.c
/***********************************************************************
* set_window_pos
*
* Backend implementation of SetWindowPos.
*/
BOOL set_window_pos( HWND hwnd, HWND insert_after, UINT swp_flags,
const RECT *window_rect, const RECT *client_rect, const RECT *valid_rects )
{
WND *win;
HWND surface_win = 0, parent = GetAncestor( hwnd, GA_PARENT );
BOOL ret, needs_update = FALSE;
RECT visible_rect, old_visible_rect, old_window_rect, old_client_rect;
struct window_surface *old_surface, *new_surface = NULL;
if (!parent || parent == GetDesktopWindow())
{
new_surface = &dummy_surface; /* provide a default surface for top-level windows */
window_surface_add_ref( new_surface );
}
visible_rect = *window_rect;
USER_Driver->pWindowPosChanging( hwnd, insert_after, swp_flags,
window_rect, client_rect, &visible_rect, &new_surface );
WIN_GetRectangles( hwnd, COORDS_SCREEN, &old_window_rect, NULL );
if (!(win = WIN_GetPtr( hwnd )) || win == WND_DESKTOP || win == WND_OTHER_PROCESS)
{
if (new_surface) window_surface_release( new_surface );
return FALSE;
}
old_visible_rect = win->visible_rect;
old_client_rect = win->rectClient;
old_surface = win->surface;
if (old_surface != new_surface) swp_flags |= SWP_FRAMECHANGED; /* force refreshing non-client area */
SERVER_START_REQ( set_window_pos )
{
req->handle = wine_server_user_handle( hwnd );
req->previous = wine_server_user_handle( insert_after );
req->swp_flags = swp_flags;
req->window.left = window_rect->left;
req->window.top = window_rect->top;
req->window.right = window_rect->right;
req->window.bottom = window_rect->bottom;
req->client.left = client_rect->left;
req->client.top = client_rect->top;
req->client.right = client_rect->right;
req->client.bottom = client_rect->bottom;
if (!EqualRect( window_rect, &visible_rect ) || !IsRectEmpty( &valid_rects[0] ))
{
wine_server_add_data( req, &visible_rect, sizeof(visible_rect) );
if (!IsRectEmpty( &valid_rects[0] ))
wine_server_add_data( req, valid_rects, 2 * sizeof(*valid_rects) );
}
if (new_surface) req->paint_flags |= SET_WINPOS_PAINT_SURFACE;
if (win->pixel_format) req->paint_flags |= SET_WINPOS_PIXEL_FORMAT;
if ((ret = !wine_server_call( req )))
{
win->dwStyle = reply->new_style;
win->dwExStyle = reply->new_ex_style;
win->rectWindow = *window_rect;
win->rectClient = *client_rect;
win->visible_rect = visible_rect;
win->surface = new_surface;
surface_win = wine_server_ptr_handle( reply->surface_win );
needs_update = reply->needs_update;
if (GetWindowLongW( win->parent, GWL_EXSTYLE ) & WS_EX_LAYOUTRTL)
{
RECT client;
GetClientRect( win->parent, &client );
mirror_rect( &client, &win->rectWindow );
mirror_rect( &client, &win->rectClient );
mirror_rect( &client, &win->visible_rect );
}
/* if an RTL window is resized the children have moved */
if (win->dwExStyle & WS_EX_LAYOUTRTL &&
client_rect->right - client_rect->left != old_client_rect.right - old_client_rect.left)
win->flags |= WIN_CHILDREN_MOVED;
}
}
SERVER_END_REQ;
if (ret)
{
if (needs_update) update_surface_region( surface_win );
if (((swp_flags & SWP_AGG_NOPOSCHANGE) != SWP_AGG_NOPOSCHANGE) ||
(swp_flags & (SWP_HIDEWINDOW | SWP_SHOWWINDOW | SWP_STATECHANGED | SWP_FRAMECHANGED)))
invalidate_dce( win, &old_window_rect );
}
WIN_ReleasePtr( win );
if (ret)
{
TRACE( "win %p surface %p -> %p\n", hwnd, old_surface, new_surface );
register_window_surface( old_surface, new_surface );
if (old_surface)
{
if (!IsRectEmpty( valid_rects ))
{
move_window_bits( hwnd, old_surface, new_surface, &visible_rect,
&old_visible_rect, window_rect, valid_rects );
valid_rects = NULL; /* prevent the driver from trying to also move the bits */
}
window_surface_release( old_surface );
}
else if (surface_win && surface_win != hwnd)
{
if (!IsRectEmpty( valid_rects ))
{
RECT rects[2];
int x_offset = old_visible_rect.left - visible_rect.left;
int y_offset = old_visible_rect.top - visible_rect.top;
/* if all that happened is that the whole window moved, copy everything */
if (!(swp_flags & SWP_FRAMECHANGED) &&
old_visible_rect.right - visible_rect.right == x_offset &&
old_visible_rect.bottom - visible_rect.bottom == y_offset &&
old_client_rect.left - client_rect->left == x_offset &&
old_client_rect.right - client_rect->right == x_offset &&
old_client_rect.top - client_rect->top == y_offset &&
old_client_rect.bottom - client_rect->bottom == y_offset &&
EqualRect( &valid_rects[0], client_rect ))
{
rects[0] = visible_rect;
rects[1] = old_visible_rect;
valid_rects = rects;
}
move_window_bits_parent( hwnd, surface_win, window_rect, valid_rects );
valid_rects = NULL; /* prevent the driver from trying to also move the bits */
}
}
USER_Driver->pWindowPosChanged( hwnd, insert_after, swp_flags, window_rect,
client_rect, &visible_rect, valid_rects, new_surface );
}
else if (new_surface) window_surface_release( new_surface );
return ret;
}
X11DRV_WindowPosChanging
略さず掲載 :
~/wine/dlls/winex11.drv/window.c
/***********************************************************************
* WindowPosChanging (X11DRV.@)
*/
void CDECL X11DRV_WindowPosChanging( HWND hwnd, HWND insert_after, UINT swp_flags,
const RECT *window_rect, const RECT *client_rect, RECT *visible_rect,
struct window_surface **surface )
{
struct x11drv_win_data *data = get_win_data( hwnd );
RECT surface_rect;
DWORD flags;
COLORREF key;
BOOL layered = GetWindowLongW( hwnd, GWL_EXSTYLE ) & WS_EX_LAYERED;
if (!data && !(data = X11DRV_create_win_data( hwnd, window_rect, client_rect ))) return;
/* check if we need to switch the window to managed */
if (!data->managed && data->whole_window && is_window_managed( hwnd, swp_flags, window_rect ))
{
TRACE( "making win %p/%lx managed\n", hwnd, data->whole_window );
release_win_data( data );
unmap_window( hwnd );
if (!(data = get_win_data( hwnd ))) return;
data->managed = TRUE;
}
*visible_rect = *window_rect;
X11DRV_window_to_X_rect( data, visible_rect );
/* create the window surface if necessary */
if (!data->whole_window && !data->embedded) goto done;
if (swp_flags & SWP_HIDEWINDOW) goto done;
if (data->use_alpha) goto done;
if (!get_surface_rect( visible_rect, &surface_rect )) goto done;
if (*surface) window_surface_release( *surface );
*surface = NULL; /* indicate that we want to draw directly to the window */
if (data->embedded) goto done;
if (data->whole_window == root_window) goto done;
if (data->client_window) goto done;
if (!client_side_graphics && !layered) goto done;
if (data->surface)
{
if (EqualRect( &data->surface->rect, &surface_rect ))
{
/* existing surface is good enough */
window_surface_add_ref( data->surface );
*surface = data->surface;
goto done;
}
}
else if (!(swp_flags & SWP_SHOWWINDOW) && !(GetWindowLongW( hwnd, GWL_STYLE ) & WS_VISIBLE)) goto done;
if (!layered || !GetLayeredWindowAttributes( hwnd, &key, NULL, &flags ) || !(flags & LWA_COLORKEY))
key = CLR_INVALID;
*surface = create_surface( data->whole_window, &data->vis, &surface_rect, key, FALSE );
done:
release_win_data( data );
}
X11DRV_WindowPosChanged
略さず掲載 :
~/wine/dlls/winex11.drv/window.c
/***********************************************************************
* WindowPosChanged (X11DRV.@)
*/
void CDECL X11DRV_WindowPosChanged( HWND hwnd, HWND insert_after, UINT swp_flags,
const RECT *rectWindow, const RECT *rectClient,
const RECT *visible_rect, const RECT *valid_rects,
struct window_surface *surface )
{
struct x11drv_thread_data *thread_data;
struct x11drv_win_data *data;
DWORD new_style = GetWindowLongW( hwnd, GWL_STYLE );
RECT old_window_rect, old_whole_rect, old_client_rect;
int event_type;
if (!(data = get_win_data( hwnd ))) return;
thread_data = x11drv_thread_data();
old_window_rect = data->window_rect;
old_whole_rect = data->whole_rect;
old_client_rect = data->client_rect;
data->window_rect = *rectWindow;
data->whole_rect = *visible_rect;
data->client_rect = *rectClient;
if (data->vis.visualid == default_visual.visualid)
{
if (surface) window_surface_add_ref( surface );
if (data->surface) window_surface_release( data->surface );
data->surface = surface;
}
TRACE( "win %p window %s client %s style %08x flags %08x\n",
hwnd, wine_dbgstr_rect(rectWindow), wine_dbgstr_rect(rectClient), new_style, swp_flags );
if (!IsRectEmpty( &valid_rects[0] ))
{
Window window = data->whole_window;
int x_offset = old_whole_rect.left - data->whole_rect.left;
int y_offset = old_whole_rect.top - data->whole_rect.top;
/* if all that happened is that the whole window moved, copy everything */
if (!(swp_flags & SWP_FRAMECHANGED) &&
old_whole_rect.right - data->whole_rect.right == x_offset &&
old_whole_rect.bottom - data->whole_rect.bottom == y_offset &&
old_client_rect.left - data->client_rect.left == x_offset &&
old_client_rect.right - data->client_rect.right == x_offset &&
old_client_rect.top - data->client_rect.top == y_offset &&
old_client_rect.bottom - data->client_rect.bottom == y_offset &&
EqualRect( &valid_rects[0], &data->client_rect ))
{
/* if we have an X window the bits will be moved by the X server */
if (!window && (x_offset != 0 || y_offset != 0))
{
release_win_data( data );
move_window_bits( hwnd, window, &old_whole_rect, visible_rect,
&old_client_rect, rectClient, rectWindow );
if (!(data = get_win_data( hwnd ))) return;
}
}
else
{
release_win_data( data );
move_window_bits( hwnd, window, &valid_rects[1], &valid_rects[0],
&old_client_rect, rectClient, rectWindow );
if (!(data = get_win_data( hwnd ))) return;
}
}
XFlush( gdi_display ); /* make sure painting is done before we move the window */
sync_client_position( data, &old_client_rect, &old_whole_rect );
if (!data->whole_window)
{
BOOL needs_resize = (!data->client_window &&
(data->client_rect.right - data->client_rect.left !=
old_client_rect.right - old_client_rect.left ||
data->client_rect.bottom - data->client_rect.top !=
old_client_rect.bottom - old_client_rect.top));
release_win_data( data );
if (needs_resize) sync_gl_drawable( hwnd );
return;
}
/* check if we are currently processing an event relevant to this window */
event_type = 0;
if (thread_data &&
thread_data->current_event &&
thread_data->current_event->xany.window == data->whole_window)
{
event_type = thread_data->current_event->type;
if (event_type != ConfigureNotify && event_type != PropertyNotify &&
event_type != GravityNotify && event_type != ReparentNotify)
event_type = 0; /* ignore other events */
}
if (data->mapped && event_type != ReparentNotify)
{
if (((swp_flags & SWP_HIDEWINDOW) && !(new_style & WS_VISIBLE)) ||
(!event_type && !(new_style & WS_MINIMIZE) &&
!is_window_rect_mapped( rectWindow ) && is_window_rect_mapped( &old_window_rect )))
{
release_win_data( data );
unmap_window( hwnd );
if (is_window_rect_fullscreen( &old_window_rect )) reset_clipping_window();
if (!(data = get_win_data( hwnd ))) return;
}
}
/* don't change position if we are about to minimize or maximize a managed window */
if (!event_type &&
!(data->managed && (swp_flags & SWP_STATECHANGED) && (new_style & (WS_MINIMIZE|WS_MAXIMIZE))))
sync_window_position( data, swp_flags, &old_window_rect, &old_whole_rect, &old_client_rect );
if ((new_style & WS_VISIBLE) &&
((new_style & WS_MINIMIZE) || is_window_rect_mapped( rectWindow )))
{
if (!data->mapped)
{
BOOL needs_icon = !data->icon_pixmap;
BOOL needs_map = TRUE;
/* layered windows are mapped only once their attributes are set */
if (GetWindowLongW( hwnd, GWL_EXSTYLE ) & WS_EX_LAYERED) needs_map = data->layered;
release_win_data( data );
if (needs_icon) fetch_icon_data( hwnd, 0, 0 );
if (needs_map) map_window( hwnd, new_style );
return;
}
else if ((swp_flags & SWP_STATECHANGED) && (!data->iconic != !(new_style & WS_MINIMIZE)))
{
set_wm_hints( data );
data->iconic = (new_style & WS_MINIMIZE) != 0;
TRACE( "changing win %p iconic state to %u\n", data->hwnd, data->iconic );
if (data->iconic)
XIconifyWindow( data->display, data->whole_window, data->vis.screen );
else if (is_window_rect_mapped( rectWindow ))
XMapWindow( data->display, data->whole_window );
update_net_wm_states( data );
}
else
{
if (swp_flags & (SWP_FRAMECHANGED|SWP_STATECHANGED)) set_wm_hints( data );
if (!event_type) update_net_wm_states( data );
}
}
XFlush( data->display ); /* make sure changes are done before we start painting again */
if (data->surface && data->vis.visualid != default_visual.visualid)
data->surface->funcs->flush( data->surface );
release_win_data( data );
}
重要メモ
void CDECL X11DRV_WindowPosChanging(
HWND hwnd, HWND insert_after,UINT swp_flags,
const RECT *window_rect, const RECT *client_rect,
RECT *visible_rect,
struct window_surface **surface )
の中で、
struct x11drv_win_data *data = get_win_data( hwnd );
if ( !data &&
!(data = X11DRV_create_win_data(
hwnd,
window_rect,
client_rect ))) return;
の部分は、hwnd がまだ初期化されていない時には、X11DRV_create_win_data()
を呼び出して、struct x11drv_win_data *data; の実体を作る、ということであろう。
そして、一度作成された「data」は、get_win_data( hwnd ) で取得できると。そして、X11DRV_create_win_data() の中の、
if (!(data = alloc_win_data( display, hwnd ))) return NULL;
の部分で、alloc_win_data() の中は、
if ((data = HeapAlloc(GetProcessHeap(),
HEAP_ZERO_MEMORY, sizeof(*data)))) {
/* 中略 */
}
/* 中略 */
return data;
となっており、data の中は、data->vis, data->use_alpha 以外は、全て 0 クリアされるらしい。次に、
if (parent == GetDesktopWindow()) {
create_whole_window( data );
TRACE( "win %p/%lx window %s whole %s client %s\n",
hwnd, data->whole_window,
wine_dbgstr_rect( &data->window_rect ),
wine_dbgstr_rect( &data->whole_rect ),
wine_dbgstr_rect( &data->client_rect ));
}
となっている。create_whole_window() の中に、次のコードがある :
data->whole_window = XCreateWindow(
data->display, root_window,
pos.x, pos.y,
cx, cy, 0,
data->vis.depth, InputOutput,
data->vis.visual, mask, &attr );
だから、結局、基本的には、親が Desktop の時だけ、data->whole_window != NULL になると考えられる。さて、X11DRV_WindowPosChanging() の
if ( !data &&
!(data = X11DRV_create_win_data(
hwnd,
window_rect,
client_rect ))) return;
以降の行に話を戻す。何行か下に、
if (!data->whole_window && !data->embedded) goto done;
というコードがある。これは、大体で言えば、親が Desktop 以外の時は(data->whole_window == NULL なので)、done ラベルに飛んで、関数から return する、ということである。その後、
if (data->surface) {
if (EqualRect( &data->surface->rect, &surface_rect )) {
/* existing surface is good enough */
window_surface_add_ref( data->surface );
*surface = data->surface;
FIXME( "c1, hwnd=%08X, goto done\n", (DWORD)hwnd );
goto done;
}
}
else if ( !(swp_flags & SWP_SHOWWINDOW) &&
!(GetWindowLongW( hwnd, GWL_STYLE ) & WS_VISIBLE)) goto done;
というところがあるが、大体の意味は、既に data->surface が NULL でなく、かつ、今までと矩形の位置と寸法に変化がない場合は、今までの data->surface を再利用して、*surface = data->surface としてしまって、そのまま関数から return する、ということである。逆に、矩形が変わった場合は、上記の if 文には入らないので最後の方まで行き、
*surface = create_surface(
data->whole_window,
&data->vis,
&surface_rect,
key,
FALSE );
となる。これは、親が Desktop Window の場合を大前提として、data->surface がまだないか、または、あっても、data->surface と surface_rect の矩形が異なっている場合には、create_surface() が呼び出される、ということである。
さらに、set_window_pos() 関数の中で、以下のようになっている :
BOOL set_window_pos( HWND hwnd, ・・・ )
{
WND *win;
struct window_surface *new_surface = NULL;
/* 中略 */
win = WIN_GetPtr( hwnd )
/* 中略 */
USER_Driver->pWindowPosChanging(
hwnd, insert_after, swp_flags,
window_rect, client_rect,
&visible_rect, &new_surface );
/* 中略 */
win->surface = new_surface;
/* 中略 */
}
どういうことかというと、X11DRV_WindowPosChanging() の中で、
*surface = xxx;
とされると、set_window_pos() からみると、new_surface = xxx とされたのと同じ事になるから、結局、
win->surface = xxx;
とされたのと同じ事になる、ということである。
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