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wine/dlls/win32u/dce.c
Pedro Perdigão 1146bde39e win32u: Allow an out-of-order RECT in RedrawWindow(). 
Signed-off-by: Pedro Perdigão <pperdigao@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
2022-05-13 22:11:40 +02:00

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/*
* Window painting functions
*
* Copyright 1993, 1994, 1995, 2001, 2004, 2005, 2008 Alexandre Julliard
* Copyright 1996, 1997, 1999 Alex Korobka
*
* 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 2.1 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#if 0
#pragma makedep unix
#endif
#include <assert.h>
#include <pthread.h>
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "ntgdi_private.h"
#include "ntuser_private.h"
#include "wine/server.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(win);
struct dce
{
struct list entry; /* entry in global DCE list */
HDC hdc;
HWND hwnd;
HRGN clip_rgn;
DWORD flags;
LONG count; /* usage count; 0 or 1 for cache DCEs, always 1 for window DCEs,
always >= 1 for class DCEs */
};
static struct list dce_list = LIST_INIT(dce_list);
#define DCE_CACHE_SIZE 64
static struct list window_surfaces = LIST_INIT( window_surfaces );
static pthread_mutex_t surfaces_lock = PTHREAD_MUTEX_INITIALIZER;
/*******************************************************************
* Dummy window surface for windows that shouldn't get painted.
*/
static void dummy_surface_lock( struct window_surface *window_surface )
{
/* nothing to do */
}
static void dummy_surface_unlock( struct window_surface *window_surface )
{
/* nothing to do */
}
static void *dummy_surface_get_bitmap_info( struct window_surface *window_surface, BITMAPINFO *info )
{
static DWORD dummy_data;
info->bmiHeader.biSize = sizeof( info->bmiHeader );
info->bmiHeader.biWidth = dummy_surface.rect.right;
info->bmiHeader.biHeight = dummy_surface.rect.bottom;
info->bmiHeader.biPlanes = 1;
info->bmiHeader.biBitCount = 32;
info->bmiHeader.biCompression = BI_RGB;
info->bmiHeader.biSizeImage = 0;
info->bmiHeader.biXPelsPerMeter = 0;
info->bmiHeader.biYPelsPerMeter = 0;
info->bmiHeader.biClrUsed = 0;
info->bmiHeader.biClrImportant = 0;
return &dummy_data;
}
static RECT *dummy_surface_get_bounds( struct window_surface *window_surface )
{
static RECT dummy_bounds;
return &dummy_bounds;
}
static void dummy_surface_set_region( struct window_surface *window_surface, HRGN region )
{
/* nothing to do */
}
static void dummy_surface_flush( struct window_surface *window_surface )
{
/* nothing to do */
}
static void dummy_surface_destroy( struct window_surface *window_surface )
{
/* nothing to do */
}
static const struct window_surface_funcs dummy_surface_funcs =
{
dummy_surface_lock,
dummy_surface_unlock,
dummy_surface_get_bitmap_info,
dummy_surface_get_bounds,
dummy_surface_set_region,
dummy_surface_flush,
dummy_surface_destroy
};
struct window_surface dummy_surface = { &dummy_surface_funcs, { NULL, NULL }, 1, { 0, 0, 1, 1 } };
/*******************************************************************
* Off-screen window surface.
*/
struct offscreen_window_surface
{
struct window_surface header;
pthread_mutex_t mutex;
RECT bounds;
char *bits;
BITMAPINFO info;
};
static const struct window_surface_funcs offscreen_window_surface_funcs;
static struct offscreen_window_surface *impl_from_window_surface( struct window_surface *base )
{
if (!base || base->funcs != &offscreen_window_surface_funcs) return NULL;
return CONTAINING_RECORD( base, struct offscreen_window_surface, header );
}
static void offscreen_window_surface_lock( struct window_surface *base )
{
struct offscreen_window_surface *impl = impl_from_window_surface( base );
pthread_mutex_lock( &impl->mutex );
}
static void offscreen_window_surface_unlock( struct window_surface *base )
{
struct offscreen_window_surface *impl = impl_from_window_surface( base );
pthread_mutex_unlock( &impl->mutex );
}
static RECT *offscreen_window_surface_get_bounds( struct window_surface *base )
{
struct offscreen_window_surface *impl = impl_from_window_surface( base );
return &impl->bounds;
}
static void *offscreen_window_surface_get_bitmap_info( struct window_surface *base, BITMAPINFO *info )
{
struct offscreen_window_surface *impl = impl_from_window_surface( base );
info->bmiHeader = impl->info.bmiHeader;
return impl->bits;
}
static void offscreen_window_surface_set_region( struct window_surface *base, HRGN region )
{
}
static void offscreen_window_surface_flush( struct window_surface *base )
{
struct offscreen_window_surface *impl = impl_from_window_surface( base );
base->funcs->lock( base );
reset_bounds( &impl->bounds );
base->funcs->unlock( base );
}
static void offscreen_window_surface_destroy( struct window_surface *base )
{
struct offscreen_window_surface *impl = impl_from_window_surface( base );
free( impl );
}
static const struct window_surface_funcs offscreen_window_surface_funcs =
{
offscreen_window_surface_lock,
offscreen_window_surface_unlock,
offscreen_window_surface_get_bitmap_info,
offscreen_window_surface_get_bounds,
offscreen_window_surface_set_region,
offscreen_window_surface_flush,
offscreen_window_surface_destroy
};
void create_offscreen_window_surface( const RECT *visible_rect, struct window_surface **surface )
{
struct offscreen_window_surface *impl;
SIZE_T size;
RECT surface_rect = *visible_rect;
pthread_mutexattr_t attr;
TRACE( "visible_rect %s, surface %p.\n", wine_dbgstr_rect( visible_rect ), surface );
OffsetRect( &surface_rect, -surface_rect.left, -surface_rect.top );
surface_rect.right = (surface_rect.right + 0x1f) & ~0x1f;
surface_rect.bottom = (surface_rect.bottom + 0x1f) & ~0x1f;
/* check that old surface is an offscreen_window_surface, or release it */
if ((impl = impl_from_window_surface( *surface )))
{
/* if the rect didn't change, keep the same surface */
if (EqualRect( &surface_rect, &impl->header.rect )) return;
window_surface_release( &impl->header );
}
else if (*surface) window_surface_release( *surface );
/* create a new window surface */
*surface = NULL;
size = surface_rect.right * surface_rect.bottom * 4;
if (!(impl = calloc(1, offsetof( struct offscreen_window_surface, info.bmiColors[0] ) + size))) return;
impl->header.funcs = &offscreen_window_surface_funcs;
impl->header.ref = 1;
impl->header.rect = surface_rect;
pthread_mutexattr_init( &attr );
pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_RECURSIVE );
pthread_mutex_init( &impl->mutex, &attr );
pthread_mutexattr_destroy( &attr );
reset_bounds( &impl->bounds );
impl->bits = (char *)&impl->info.bmiColors[0];
impl->info.bmiHeader.biSize = sizeof( impl->info );
impl->info.bmiHeader.biWidth = surface_rect.right;
impl->info.bmiHeader.biHeight = surface_rect.bottom;
impl->info.bmiHeader.biPlanes = 1;
impl->info.bmiHeader.biBitCount = 32;
impl->info.bmiHeader.biCompression = BI_RGB;
impl->info.bmiHeader.biSizeImage = size;
TRACE( "created window surface %p\n", &impl->header );
*surface = &impl->header;
}
/* window surface used to implement the DIB.DRV driver */
struct dib_window_surface
{
struct window_surface header;
RECT bounds;
void *bits;
UINT info_size;
BITMAPINFO info; /* variable size, must be last */
};
static struct dib_window_surface *get_dib_surface( struct window_surface *surface )
{
return (struct dib_window_surface *)surface;
}
/***********************************************************************
* dib_surface_lock
*/
static void dib_surface_lock( struct window_surface *window_surface )
{
/* nothing to do */
}
/***********************************************************************
* dib_surface_unlock
*/
static void dib_surface_unlock( struct window_surface *window_surface )
{
/* nothing to do */
}
/***********************************************************************
* dib_surface_get_bitmap_info
*/
static void *dib_surface_get_bitmap_info( struct window_surface *window_surface, BITMAPINFO *info )
{
struct dib_window_surface *surface = get_dib_surface( window_surface );
memcpy( info, &surface->info, surface->info_size );
return surface->bits;
}
/***********************************************************************
* dib_surface_get_bounds
*/
static RECT *dib_surface_get_bounds( struct window_surface *window_surface )
{
struct dib_window_surface *surface = get_dib_surface( window_surface );
return &surface->bounds;
}
/***********************************************************************
* dib_surface_set_region
*/
static void dib_surface_set_region( struct window_surface *window_surface, HRGN region )
{
/* nothing to do */
}
/***********************************************************************
* dib_surface_flush
*/
static void dib_surface_flush( struct window_surface *window_surface )
{
/* nothing to do */
}
/***********************************************************************
* dib_surface_destroy
*/
static void dib_surface_destroy( struct window_surface *window_surface )
{
struct dib_window_surface *surface = get_dib_surface( window_surface );
TRACE( "freeing %p\n", surface );
free( surface );
}
static const struct window_surface_funcs dib_surface_funcs =
{
dib_surface_lock,
dib_surface_unlock,
dib_surface_get_bitmap_info,
dib_surface_get_bounds,
dib_surface_set_region,
dib_surface_flush,
dib_surface_destroy
};
BOOL create_dib_surface( HDC hdc, const BITMAPINFO *info )
{
struct dib_window_surface *surface;
int color = 0;
HRGN region;
RECT rect;
if (info->bmiHeader.biBitCount <= 8)
color = info->bmiHeader.biClrUsed ? info->bmiHeader.biClrUsed : (1 << info->bmiHeader.biBitCount);
else if (info->bmiHeader.biCompression == BI_BITFIELDS)
color = 3;
surface = calloc( 1, offsetof( struct dib_window_surface, info.bmiColors[color] ));
if (!surface) return FALSE;
rect.left = 0;
rect.top = 0;
rect.right = info->bmiHeader.biWidth;
rect.bottom = abs(info->bmiHeader.biHeight);
surface->header.funcs = &dib_surface_funcs;
surface->header.rect = rect;
surface->header.ref = 1;
surface->info_size = offsetof( BITMAPINFO, bmiColors[color] );
surface->bits = (char *)info + surface->info_size;
memcpy( &surface->info, info, surface->info_size );
TRACE( "created %p %ux%u for info %p bits %p\n",
surface, rect.right, rect.bottom, info, surface->bits );
region = NtGdiCreateRectRgn( rect.left, rect.top, rect.right, rect.bottom );
set_visible_region( hdc, region, &rect, &rect, &surface->header );
TRACE( "using hdc %p surface %p\n", hdc, surface );
window_surface_release( &surface->header );
return TRUE;
}
/*******************************************************************
* register_window_surface
*
* Register a window surface in the global list, possibly replacing another one.
*/
void register_window_surface( struct window_surface *old, struct window_surface *new )
{
if (old == &dummy_surface) old = NULL;
if (new == &dummy_surface) new = NULL;
if (old == new) return;
pthread_mutex_lock( &surfaces_lock );
if (old) list_remove( &old->entry );
if (new) list_add_tail( &window_surfaces, &new->entry );
pthread_mutex_unlock( &surfaces_lock );
}
/*******************************************************************
* flush_window_surfaces
*
* Flush pending output from all window surfaces.
*/
void flush_window_surfaces( BOOL idle )
{
static DWORD last_idle;
DWORD now;
struct window_surface *surface;
pthread_mutex_lock( &surfaces_lock );
now = NtGetTickCount();
if (idle) last_idle = now;
/* if not idle, we only flush if there's evidence that the app never goes idle */
else if ((int)(now - last_idle) < 50) goto done;
LIST_FOR_EACH_ENTRY( surface, &window_surfaces, struct window_surface, entry )
surface->funcs->flush( surface );
done:
pthread_mutex_unlock( &surfaces_lock );
}
/***********************************************************************
* dump_rdw_flags
*/
static void dump_rdw_flags(UINT flags)
{
TRACE("flags:");
if (flags & RDW_INVALIDATE) TRACE(" RDW_INVALIDATE");
if (flags & RDW_INTERNALPAINT) TRACE(" RDW_INTERNALPAINT");
if (flags & RDW_ERASE) TRACE(" RDW_ERASE");
if (flags & RDW_VALIDATE) TRACE(" RDW_VALIDATE");
if (flags & RDW_NOINTERNALPAINT) TRACE(" RDW_NOINTERNALPAINT");
if (flags & RDW_NOERASE) TRACE(" RDW_NOERASE");
if (flags & RDW_NOCHILDREN) TRACE(" RDW_NOCHILDREN");
if (flags & RDW_ALLCHILDREN) TRACE(" RDW_ALLCHILDREN");
if (flags & RDW_UPDATENOW) TRACE(" RDW_UPDATENOW");
if (flags & RDW_ERASENOW) TRACE(" RDW_ERASENOW");
if (flags & RDW_FRAME) TRACE(" RDW_FRAME");
if (flags & RDW_NOFRAME) TRACE(" RDW_NOFRAME");
#define RDW_FLAGS \
(RDW_INVALIDATE | \
RDW_INTERNALPAINT | \
RDW_ERASE | \
RDW_VALIDATE | \
RDW_NOINTERNALPAINT | \
RDW_NOERASE | \
RDW_NOCHILDREN | \
RDW_ALLCHILDREN | \
RDW_UPDATENOW | \
RDW_ERASENOW | \
RDW_FRAME | \
RDW_NOFRAME)
if (flags & ~RDW_FLAGS) TRACE(" %04x", flags & ~RDW_FLAGS);
TRACE("\n");
#undef RDW_FLAGS
}
/***********************************************************************
* 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 = malloc( 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 = NtGdiExtCreateRegion( 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;
free( 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) NtGdiCombineRgn( 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 = get_win_ptr( top_win );
if (win && win != WND_DESKTOP && win != WND_OTHER_PROCESS)
{
surface = win->surface;
if (surface) window_surface_add_ref( surface );
release_win_ptr( win );
}
}
if (!surface) SetRectEmpty( &top_rect );
set_visible_region( dce->hdc, vis_rgn, &win_rect, &top_rect, surface );
if (surface) window_surface_release( surface );
}
/***********************************************************************
* release_dce
*/
static void release_dce( struct dce *dce )
{
if (!dce->hwnd) return; /* already released */
set_visible_region( dce->hdc, 0, &dummy_surface.rect, &dummy_surface.rect, &dummy_surface );
user_driver->pReleaseDC( dce->hwnd, dce->hdc );
if (dce->clip_rgn) NtGdiDeleteObjectApp( dce->clip_rgn );
dce->clip_rgn = 0;
dce->hwnd = 0;
dce->flags &= DCX_CACHE;
}
/***********************************************************************
* delete_clip_rgn
*/
static void delete_clip_rgn( struct dce *dce )
{
if (!dce->clip_rgn) return; /* nothing to do */
dce->flags &= ~(DCX_EXCLUDERGN | DCX_INTERSECTRGN);
NtGdiDeleteObjectApp( dce->clip_rgn );
dce->clip_rgn = 0;
/* make it dirty so that the vis rgn gets recomputed next time */
set_dce_flags( dce->hdc, DCHF_INVALIDATEVISRGN );
}
/***********************************************************************
* delete_dce
*/
BOOL delete_dce( struct dce *dce )
{
BOOL ret = TRUE;
TRACE( "hdc = %p\n", dce->hdc );
user_lock();
if (!(dce->flags & DCX_CACHE))
{
WARN("Application trying to delete an owned DC %p\n", dce->hdc);
ret = FALSE;
}
else
{
list_remove( &dce->entry );
if (dce->clip_rgn) NtGdiDeleteObjectApp( dce->clip_rgn );
free( dce );
}
user_unlock();
return ret;
}
/***********************************************************************
* update_dc
*
* Make sure the DC vis region is up to date.
* This function may need user lock so the GDI lock should _not_
* be held when calling it.
*/
void update_dc( DC *dc )
{
if (!dc->dirty) return;
dc->dirty = 0;
if (dc->dce)
{
if (dc->dce->count) update_visible_region( dc->dce );
else /* non-fatal but shouldn't happen */
WARN("DC is not in use!\n");
}
}
/***********************************************************************
* alloc_dce
*
* Allocate a new DCE.
*/
static struct dce *alloc_dce(void)
{
struct dce *dce;
if (!(dce = malloc( sizeof(*dce) ))) return NULL;
if (!(dce->hdc = NtGdiOpenDCW( NULL, NULL, NULL, 0, TRUE, 0, NULL, NULL )))
{
free( dce );
return 0;
}
dce->hwnd = 0;
dce->clip_rgn = 0;
dce->flags = 0;
dce->count = 1;
set_dc_dce( dce->hdc, dce );
return dce;
}
/***********************************************************************
* get_window_dce
*/
static struct dce *get_window_dce( HWND hwnd )
{
struct dce *dce;
WND *win = get_win_ptr( hwnd );
if (!win || win == WND_OTHER_PROCESS || win == WND_DESKTOP) return NULL;
dce = win->dce;
if (!dce && (dce = get_class_dce( win->class )))
{
win->dce = dce;
dce->count++;
}
release_win_ptr( win );
if (!dce) /* try to allocate one */
{
struct dce *dce_to_free = NULL;
LONG class_style = get_class_long( hwnd, GCL_STYLE, FALSE );
if (class_style & CS_CLASSDC)
{
if (!(dce = alloc_dce())) return NULL;
win = get_win_ptr( hwnd );
if (win && win != WND_OTHER_PROCESS && win != WND_DESKTOP)
{
if (win->dce) /* another thread beat us to it */
{
dce_to_free = dce;
dce = win->dce;
}
else if ((win->dce = set_class_dce( win->class, dce )) != dce)
{
dce_to_free = dce;
dce = win->dce;
dce->count++;
}
else
{
dce->count++;
list_add_tail( &dce_list, &dce->entry );
}
release_win_ptr( win );
}
else dce_to_free = dce;
}
else if (class_style & CS_OWNDC)
{
if (!(dce = alloc_dce())) return NULL;
win = get_win_ptr( hwnd );
if (win && win != WND_OTHER_PROCESS && win != WND_DESKTOP)
{
if (win->dwStyle & WS_CLIPCHILDREN) dce->flags |= DCX_CLIPCHILDREN;
if (win->dwStyle & WS_CLIPSIBLINGS) dce->flags |= DCX_CLIPSIBLINGS;
if (win->dce) /* another thread beat us to it */
{
dce_to_free = dce;
dce = win->dce;
}
else
{
win->dce = dce;
dce->hwnd = hwnd;
list_add_tail( &dce_list, &dce->entry );
}
release_win_ptr( win );
}
else dce_to_free = dce;
}
if (dce_to_free)
{
set_dc_dce( dce_to_free->hdc, NULL );
NtGdiDeleteObjectApp( dce_to_free->hdc );
free( dce_to_free );
if (dce_to_free == dce)
dce = NULL;
}
}
return dce;
}
/***********************************************************************
* free_dce
*
* Free a class or window DCE.
*/
void free_dce( struct dce *dce, HWND hwnd )
{
struct dce *dce_to_free = NULL;
user_lock();
if (dce)
{
if (!--dce->count)
{
release_dce( dce );
list_remove( &dce->entry );
dce_to_free = dce;
}
else if (dce->hwnd == hwnd)
{
release_dce( dce );
}
}
/* now check for cache DCEs */
if (hwnd)
{
LIST_FOR_EACH_ENTRY( dce, &dce_list, struct dce, entry )
{
if (dce->hwnd != hwnd) continue;
if (!(dce->flags & DCX_CACHE)) break;
release_dce( dce );
if (dce->count)
{
WARN( "GetDC() without ReleaseDC() for window %p\n", hwnd );
dce->count = 0;
set_dce_flags( dce->hdc, DCHF_DISABLEDC );
}
}
}
user_unlock();
if (dce_to_free)
{
set_dc_dce( dce_to_free->hdc, NULL );
NtGdiDeleteObjectApp( dce_to_free->hdc );
free( dce_to_free );
}
}
/***********************************************************************
* make_dc_dirty
*
* Mark the associated DC as dirty to force a refresh of the visible region
*/
static void make_dc_dirty( struct dce *dce )
{
if (!dce->count)
{
/* Don't bother with visible regions of unused DCEs */
TRACE("purged %p hwnd %p\n", dce->hdc, dce->hwnd);
release_dce( dce );
}
else
{
/* Set dirty bits in the hDC and DCE structs */
TRACE("fixed up %p hwnd %p\n", dce->hdc, dce->hwnd);
set_dce_flags( dce->hdc, DCHF_INVALIDATEVISRGN );
}
}
/***********************************************************************
* invalidate_dce
*
* It is called from SetWindowPos() - we have to
* mark as dirty all busy DCEs for windows that have pWnd->parent as
* an ancestor and whose client rect intersects with specified update
* rectangle. In addition, pWnd->parent DCEs may need to be updated if
* DCX_CLIPCHILDREN flag is set.
*/
void invalidate_dce( WND *win, const RECT *extra_rect )
{
DPI_AWARENESS_CONTEXT context;
RECT window_rect;
struct dce *dce;
if (!win->parent) return;
context = set_thread_dpi_awareness_context( get_window_dpi_awareness_context( win->obj.handle ));
get_window_rect( win->obj.handle, &window_rect, get_thread_dpi() );
TRACE("%p parent %p %s (%s)\n",
win->obj.handle, win->parent, wine_dbgstr_rect(&window_rect), wine_dbgstr_rect(extra_rect) );
/* walk all DCEs and fixup non-empty entries */
LIST_FOR_EACH_ENTRY( dce, &dce_list, struct dce, entry )
{
if (!dce->hwnd) continue;
TRACE( "%p: hwnd %p dcx %08x %s %s\n", dce->hdc, dce->hwnd, dce->flags,
(dce->flags & DCX_CACHE) ? "Cache" : "Owned", dce->count ? "InUse" : "" );
if ((dce->hwnd == win->parent) && !(dce->flags & DCX_CLIPCHILDREN))
continue; /* child window positions don't bother us */
/* if DCE window is a child of hwnd, it has to be invalidated */
if (dce->hwnd == win->obj.handle || is_child( win->obj.handle, dce->hwnd ))
{
make_dc_dirty( dce );
continue;
}
/* otherwise check if the window rectangle intersects this DCE window */
if (win->parent == dce->hwnd || is_child( win->parent, dce->hwnd ))
{
RECT dce_rect, tmp;
get_window_rect( dce->hwnd, &dce_rect, get_thread_dpi() );
if (intersect_rect( &tmp, &dce_rect, &window_rect ) ||
(extra_rect && intersect_rect( &tmp, &dce_rect, extra_rect )))
make_dc_dirty( dce );
}
}
set_thread_dpi_awareness_context( context );
}
/***********************************************************************
* release_dc
*/
static INT release_dc( HWND hwnd, HDC hdc, BOOL end_paint )
{
struct dce *dce;
BOOL ret = FALSE;
TRACE( "%p %p\n", hwnd, hdc );
user_lock();
dce = get_dc_dce( hdc );
if (dce && dce->count && dce->hwnd)
{
if (!(dce->flags & DCX_NORESETATTRS)) set_dce_flags( dce->hdc, DCHF_RESETDC );
if (end_paint || (dce->flags & DCX_CACHE)) delete_clip_rgn( dce );
if (dce->flags & DCX_CACHE)
{
dce->count = 0;
set_dce_flags( dce->hdc, DCHF_DISABLEDC );
}
ret = TRUE;
}
user_unlock();
return ret;
}
/***********************************************************************
* NtUserGetDCEx (win32u.@)
*/
HDC WINAPI NtUserGetDCEx( HWND hwnd, HRGN clip_rgn, DWORD flags )
{
const DWORD clip_flags = DCX_PARENTCLIP | DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN | DCX_WINDOW;
const DWORD user_flags = clip_flags | DCX_NORESETATTRS; /* flags that can be set by user */
BOOL update_vis_rgn = TRUE;
struct dce *dce;
HWND parent;
LONG window_style = get_window_long( hwnd, GWL_STYLE );
if (!hwnd) hwnd = get_desktop_window();
else hwnd = get_full_window_handle( hwnd );
TRACE( "hwnd %p, clip_rgn %p, flags %08x\n", hwnd, clip_rgn, flags );
if (!is_window(hwnd)) return 0;
/* fixup flags */
if (flags & (DCX_WINDOW | DCX_PARENTCLIP)) flags |= DCX_CACHE;
if (flags & DCX_USESTYLE)
{
flags &= ~(DCX_CLIPCHILDREN | DCX_CLIPSIBLINGS | DCX_PARENTCLIP);
if (window_style & WS_CLIPSIBLINGS) flags |= DCX_CLIPSIBLINGS;
if (!(flags & DCX_WINDOW))
{
if (get_class_long( hwnd, GCL_STYLE, FALSE ) & CS_PARENTDC) flags |= DCX_PARENTCLIP;
if (window_style & WS_CLIPCHILDREN && !(window_style & WS_MINIMIZE))
flags |= DCX_CLIPCHILDREN;
}
}
if (flags & DCX_WINDOW) flags &= ~DCX_CLIPCHILDREN;
parent = NtUserGetAncestor( hwnd, GA_PARENT );
if (!parent || (parent == get_desktop_window()))
flags = (flags & ~DCX_PARENTCLIP) | DCX_CLIPSIBLINGS;
/* it seems parent clip is ignored when clipping siblings or children */
if (flags & (DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN)) flags &= ~DCX_PARENTCLIP;
if( flags & DCX_PARENTCLIP )
{
LONG parent_style = get_window_long( parent, GWL_STYLE );
if( (window_style & WS_VISIBLE) && (parent_style & WS_VISIBLE) )
{
flags &= ~DCX_CLIPCHILDREN;
if (parent_style & WS_CLIPSIBLINGS) flags |= DCX_CLIPSIBLINGS;
}
}
/* find a suitable DCE */
if ((flags & DCX_CACHE) || !(dce = get_window_dce( hwnd )))
{
struct dce *dceEmpty = NULL, *dceUnused = NULL, *found = NULL;
unsigned int count = 0;
/* Strategy: First, we attempt to find a non-empty but unused DCE with
* compatible flags. Next, we look for an empty entry. If the cache is
* full we have to purge one of the unused entries.
*/
user_lock();
LIST_FOR_EACH_ENTRY( dce, &dce_list, struct dce, entry )
{
if (!(dce->flags & DCX_CACHE)) break;
count++;
if (dce->count) continue;
dceUnused = dce;
if (!dce->hwnd) dceEmpty = dce;
else if ((dce->hwnd == hwnd) && !((dce->flags ^ flags) & clip_flags))
{
TRACE( "found valid %p hwnd %p, flags %08x\n", dce->hdc, hwnd, dce->flags );
found = dce;
update_vis_rgn = FALSE;
break;
}
}
if (!found) found = dceEmpty;
if (!found && count >= DCE_CACHE_SIZE) found = dceUnused;
dce = found;
if (dce)
{
dce->count = 1;
set_dce_flags( dce->hdc, DCHF_ENABLEDC );
}
user_unlock();
/* if there's no dce empty or unused, allocate a new one */
if (!dce)
{
if (!(dce = alloc_dce())) return 0;
dce->flags = DCX_CACHE;
user_lock();
list_add_head( &dce_list, &dce->entry );
user_unlock();
}
}
else
{
flags |= DCX_NORESETATTRS;
if (dce->hwnd != hwnd)
{
/* we should free dce->clip_rgn here, but Windows apparently doesn't */
dce->flags &= ~(DCX_EXCLUDERGN | DCX_INTERSECTRGN);
dce->clip_rgn = 0;
}
else update_vis_rgn = FALSE; /* updated automatically, via DCHook() */
}
if (flags & (DCX_INTERSECTRGN | DCX_EXCLUDERGN))
{
/* if the extra clip region has changed, get rid of the old one */
if (dce->clip_rgn != clip_rgn || ((flags ^ dce->flags) & (DCX_INTERSECTRGN | DCX_EXCLUDERGN)))
delete_clip_rgn( dce );
dce->clip_rgn = clip_rgn;
if (!dce->clip_rgn) dce->clip_rgn = NtGdiCreateRectRgn( 0, 0, 0, 0 );
dce->flags |= flags & (DCX_INTERSECTRGN | DCX_EXCLUDERGN);
update_vis_rgn = TRUE;
}
if (get_window_long( hwnd, GWL_EXSTYLE ) & WS_EX_LAYOUTRTL)
NtGdiSetLayout( dce->hdc, -1, LAYOUT_RTL );
dce->hwnd = hwnd;
dce->flags = (dce->flags & ~user_flags) | (flags & user_flags);
/* cross-process invalidation is not supported yet, so always update the vis rgn */
if (!is_current_process_window( hwnd )) update_vis_rgn = TRUE;
if (set_dce_flags( dce->hdc, DCHF_VALIDATEVISRGN )) update_vis_rgn = TRUE; /* DC was dirty */
if (update_vis_rgn) update_visible_region( dce );
TRACE( "(%p,%p,0x%x): returning %p%s\n", hwnd, clip_rgn, flags, dce->hdc,
update_vis_rgn ? " (updated)" : "" );
return dce->hdc;
}
/***********************************************************************
* NtUserReleaseDC (win32u.@)
*/
INT WINAPI NtUserReleaseDC( HWND hwnd, HDC hdc )
{
return release_dc( hwnd, hdc, FALSE );
}
/**********************************************************************
* NtUserWindowFromDC (win32u.@)
*/
HWND WINAPI NtUserWindowFromDC( HDC hdc )
{
struct dce *dce;
HWND hwnd = 0;
user_lock();
dce = get_dc_dce( hdc );
if (dce) hwnd = dce->hwnd;
user_unlock();
return hwnd;
}
/***********************************************************************
* get_update_region
*
* Return update region (in screen coordinates) for a window.
*/
static HRGN get_update_region( HWND hwnd, UINT *flags, HWND *child )
{
HRGN hrgn = 0;
NTSTATUS status;
RGNDATA *data;
size_t size = 256;
do
{
if (!(data = malloc( sizeof(*data) + size - 1 )))
{
SetLastError( ERROR_OUTOFMEMORY );
return 0;
}
SERVER_START_REQ( get_update_region )
{
req->window = wine_server_user_handle( hwnd );
req->from_child = wine_server_user_handle( child ? *child : 0 );
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;
hrgn = NtGdiExtCreateRegion( NULL, data->rdh.dwSize + data->rdh.nRgnSize, data );
if (child) *child = wine_server_ptr_handle( reply->child );
*flags = reply->flags;
}
else size = reply->total_size;
}
SERVER_END_REQ;
free( data );
} while (status == STATUS_BUFFER_OVERFLOW);
if (status) SetLastError( RtlNtStatusToDosError(status) );
return hrgn;
}
/***********************************************************************
* redraw_window_rects
*
* Redraw part of a window.
*/
static BOOL redraw_window_rects( HWND hwnd, UINT flags, const RECT *rects, UINT count )
{
BOOL ret;
if (!(flags & (RDW_INVALIDATE|RDW_VALIDATE|RDW_INTERNALPAINT|RDW_NOINTERNALPAINT)))
return TRUE; /* nothing to do */
SERVER_START_REQ( redraw_window )
{
req->window = wine_server_user_handle( hwnd );
req->flags = flags;
wine_server_add_data( req, rects, count * sizeof(RECT) );
ret = !wine_server_call_err( req );
}
SERVER_END_REQ;
return ret;
}
/***********************************************************************
* get_update_flags
*
* Get only the update flags, not the update region.
*/
static BOOL get_update_flags( HWND hwnd, HWND *child, UINT *flags )
{
BOOL ret;
SERVER_START_REQ( get_update_region )
{
req->window = wine_server_user_handle( hwnd );
req->from_child = wine_server_user_handle( child ? *child : 0 );
req->flags = *flags | UPDATE_NOREGION;
if ((ret = !wine_server_call_err( req )))
{
if (child) *child = wine_server_ptr_handle( reply->child );
*flags = reply->flags;
}
}
SERVER_END_REQ;
return ret;
}
/***********************************************************************
* send_ncpaint
*
* Send a WM_NCPAINT message if needed, and return the resulting update region (in screen coords).
* Helper for erase_now and BeginPaint.
*/
static HRGN send_ncpaint( HWND hwnd, HWND *child, UINT *flags )
{
HRGN whole_rgn = get_update_region( hwnd, flags, child );
HRGN client_rgn = 0;
DWORD style;
if (child) hwnd = *child;
if (hwnd == get_desktop_window()) return whole_rgn;
if (whole_rgn)
{
DPI_AWARENESS_CONTEXT context;
RECT client, window, update;
INT type;
context = set_thread_dpi_awareness_context( get_window_dpi_awareness_context( hwnd ));
/* check if update rgn overlaps with nonclient area */
type = NtGdiGetRgnBox( whole_rgn, &update );
get_window_rects( hwnd, COORDS_SCREEN, &window, &client, get_thread_dpi() );
if ((*flags & UPDATE_NONCLIENT) ||
update.left < client.left || update.top < client.top ||
update.right > client.right || update.bottom > client.bottom)
{
client_rgn = NtGdiCreateRectRgn( client.left, client.top, client.right, client.bottom );
NtGdiCombineRgn( client_rgn, client_rgn, whole_rgn, RGN_AND );
/* check if update rgn contains complete nonclient area */
if (type == SIMPLEREGION && EqualRect( &window, &update ))
{
NtGdiDeleteObjectApp( whole_rgn );
whole_rgn = (HRGN)1;
}
}
else
{
client_rgn = whole_rgn;
whole_rgn = 0;
}
if (whole_rgn) /* NOTE: WM_NCPAINT allows wParam to be 1 */
{
if ((*flags & UPDATE_NONCLIENT) && user_callbacks)
{
/* Mark standard scroll bars as not painted before sending WM_NCPAINT */
style = get_window_long( hwnd, GWL_STYLE );
if (style & WS_HSCROLL)
user_callbacks->set_standard_scroll_painted( hwnd, SB_HORZ, FALSE );
if (style & WS_VSCROLL)
user_callbacks->set_standard_scroll_painted( hwnd, SB_VERT, FALSE );
send_message( hwnd, WM_NCPAINT, (WPARAM)whole_rgn, 0 );
}
if (whole_rgn > (HRGN)1) NtGdiDeleteObjectApp( whole_rgn );
}
set_thread_dpi_awareness_context( context );
}
return client_rgn;
}
/***********************************************************************
* send_erase
*
* Send a WM_ERASEBKGND message if needed, and optionally return the DC for painting.
* If a DC is requested, the region is selected into it. In all cases the region is deleted.
* Helper for erase_now and BeginPaint.
*/
static BOOL send_erase( HWND hwnd, UINT flags, HRGN client_rgn,
RECT *clip_rect, HDC *hdc_ret )
{
BOOL need_erase = (flags & UPDATE_DELAYED_ERASE) != 0;
HDC hdc = 0;
RECT dummy;
if (!clip_rect) clip_rect = &dummy;
if (hdc_ret || (flags & UPDATE_ERASE))
{
UINT dcx_flags = DCX_INTERSECTRGN | DCX_USESTYLE;
if (is_iconic(hwnd)) dcx_flags |= DCX_WINDOW;
if ((hdc = NtUserGetDCEx( hwnd, client_rgn, dcx_flags )))
{
INT type = NtGdiGetAppClipBox( hdc, clip_rect );
if (flags & UPDATE_ERASE)
{
/* don't erase if the clip box is empty */
if (type != NULLREGION)
need_erase = !send_message( hwnd, WM_ERASEBKGND, (WPARAM)hdc, 0 );
}
if (!hdc_ret) release_dc( hwnd, hdc, TRUE );
}
if (hdc_ret) *hdc_ret = hdc;
}
if (!hdc) NtGdiDeleteObjectApp( client_rgn );
return need_erase;
}
/***********************************************************************
* copy_bits_from_surface
*
* Copy bits from a window surface; helper for move_window_bits and move_window_bits_parent.
*/
static void copy_bits_from_surface( HWND hwnd, struct window_surface *surface,
const RECT *dst, const RECT *src )
{
char buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
BITMAPINFO *info = (BITMAPINFO *)buffer;
void *bits;
UINT flags = UPDATE_NOCHILDREN | UPDATE_CLIPCHILDREN;
HRGN rgn = get_update_region( hwnd, &flags, NULL );
HDC hdc = NtUserGetDCEx( hwnd, rgn, DCX_CACHE | DCX_WINDOW | DCX_EXCLUDERGN );
bits = surface->funcs->get_info( surface, info );
surface->funcs->lock( surface );
NtGdiSetDIBitsToDeviceInternal( hdc, dst->left, dst->top, dst->right - dst->left, dst->bottom - dst->top,
src->left - surface->rect.left, surface->rect.bottom - src->bottom,
0, surface->rect.bottom - surface->rect.top,
bits, info, DIB_RGB_COLORS, 0, 0, FALSE, NULL );
surface->funcs->unlock( surface );
NtUserReleaseDC( hwnd, hdc );
}
/***********************************************************************
* move_window_bits
*
* Move the window bits when a window is resized or its surface recreated.
*/
void move_window_bits( HWND hwnd, struct window_surface *old_surface,
struct window_surface *new_surface,
const RECT *visible_rect, const RECT *old_visible_rect,
const RECT *window_rect, const RECT *valid_rects )
{
RECT dst = valid_rects[0];
RECT src = valid_rects[1];
if (new_surface != old_surface ||
src.left - old_visible_rect->left != dst.left - visible_rect->left ||
src.top - old_visible_rect->top != dst.top - visible_rect->top)
{
TRACE( "copying %s -> %s\n", wine_dbgstr_rect( &src ), wine_dbgstr_rect( &dst ));
OffsetRect( &src, -old_visible_rect->left, -old_visible_rect->top );
OffsetRect( &dst, -window_rect->left, -window_rect->top );
copy_bits_from_surface( hwnd, old_surface, &dst, &src );
}
}
/***********************************************************************
* move_window_bits_parent
*
* Move the window bits in the parent surface when a child is moved.
*/
void move_window_bits_parent( HWND hwnd, HWND parent, const RECT *window_rect, const RECT *valid_rects )
{
struct window_surface *surface;
RECT dst = valid_rects[0];
RECT src = valid_rects[1];
WND *win;
if (src.left == dst.left && src.top == dst.top) return;
if (!(win = get_win_ptr( parent ))) return;
if (win == WND_DESKTOP || win == WND_OTHER_PROCESS) return;
if (!(surface = win->surface))
{
release_win_ptr( win );
return;
}
TRACE( "copying %s -> %s\n", wine_dbgstr_rect( &src ), wine_dbgstr_rect( &dst ));
map_window_points( NtUserGetAncestor( hwnd, GA_PARENT ), parent, (POINT *)&src, 2, get_thread_dpi() );
OffsetRect( &src, win->client_rect.left - win->visible_rect.left,
win->client_rect.top - win->visible_rect.top );
OffsetRect( &dst, -window_rect->left, -window_rect->top );
window_surface_add_ref( surface );
release_win_ptr( win );
copy_bits_from_surface( hwnd, surface, &dst, &src );
window_surface_release( surface );
}
/***********************************************************************
* NtUserBeginPaint (win32u.@)
*/
HDC WINAPI NtUserBeginPaint( HWND hwnd, PAINTSTRUCT *ps )
{
HRGN hrgn;
HDC hdc;
BOOL erase;
RECT rect;
UINT flags = UPDATE_NONCLIENT | UPDATE_ERASE | UPDATE_PAINT | UPDATE_INTERNALPAINT | UPDATE_NOCHILDREN;
NtUserHideCaret( hwnd );
if (!(hrgn = send_ncpaint( hwnd, NULL, &flags ))) return 0;
erase = send_erase( hwnd, flags, hrgn, &rect, &hdc );
TRACE( "hdc = %p box = (%s), fErase = %d\n", hdc, wine_dbgstr_rect(&rect), erase );
if (!ps)
{
release_dc( hwnd, hdc, TRUE );
return 0;
}
ps->fErase = erase;
ps->rcPaint = rect;
ps->hdc = hdc;
return hdc;
}
/***********************************************************************
* NtUserEndPaint (win32u.@)
*/
BOOL WINAPI NtUserEndPaint( HWND hwnd, const PAINTSTRUCT *ps )
{
NtUserShowCaret( hwnd );
flush_window_surfaces( FALSE );
if (!ps) return FALSE;
release_dc( hwnd, ps->hdc, TRUE );
return TRUE;
}
/***********************************************************************
* erase_now
*
* Implementation of RDW_ERASENOW behavior.
*/
void erase_now( HWND hwnd, UINT rdw_flags )
{
HWND child = 0;
HRGN hrgn;
BOOL need_erase = FALSE;
/* loop while we find a child to repaint */
for (;;)
{
UINT flags = UPDATE_NONCLIENT | UPDATE_ERASE;
if (rdw_flags & RDW_NOCHILDREN) flags |= UPDATE_NOCHILDREN;
else if (rdw_flags & RDW_ALLCHILDREN) flags |= UPDATE_ALLCHILDREN;
if (need_erase) flags |= UPDATE_DELAYED_ERASE;
if (!(hrgn = send_ncpaint( hwnd, &child, &flags ))) break;
need_erase = send_erase( child, flags, hrgn, NULL, NULL );
if (!flags) break; /* nothing more to do */
if ((rdw_flags & RDW_NOCHILDREN) && !need_erase) break;
}
}
/***********************************************************************
* update_now
*
* Implementation of RDW_UPDATENOW behavior.
*/
static void update_now( HWND hwnd, UINT rdw_flags )
{
HWND child = 0;
/* desktop window never gets WM_PAINT, only WM_ERASEBKGND */
if (hwnd == get_desktop_window()) erase_now( hwnd, rdw_flags | RDW_NOCHILDREN );
/* loop while we find a child to repaint */
for (;;)
{
UINT flags = UPDATE_PAINT | UPDATE_INTERNALPAINT;
if (rdw_flags & RDW_NOCHILDREN) flags |= UPDATE_NOCHILDREN;
else if (rdw_flags & RDW_ALLCHILDREN) flags |= UPDATE_ALLCHILDREN;
if (!get_update_flags( hwnd, &child, &flags )) break;
if (!flags) break; /* nothing more to do */
send_message( child, WM_PAINT, 0, 0 );
if (rdw_flags & RDW_NOCHILDREN) break;
}
}
/***********************************************************************
* NtUserRedrawWindow (win32u.@)
*/
BOOL WINAPI NtUserRedrawWindow( HWND hwnd, const RECT *rect, HRGN hrgn, UINT flags )
{
LARGE_INTEGER zero = { .QuadPart = 0 };
static const RECT empty;
BOOL ret;
if (TRACE_ON(win))
{
if (hrgn)
{
RECT r;
NtGdiGetRgnBox( hrgn, &r );
TRACE( "%p region %p box %s ", hwnd, hrgn, wine_dbgstr_rect(&r) );
}
else if (rect)
TRACE( "%p rect %s ", hwnd, wine_dbgstr_rect(rect) );
else
TRACE( "%p whole window ", hwnd );
dump_rdw_flags(flags);
}
/* process pending expose events before painting */
if (flags & RDW_UPDATENOW) user_driver->pMsgWaitForMultipleObjectsEx( 0, NULL, &zero, QS_PAINT, 0 );
if (rect && !hrgn)
{
RECT ordered = *rect;
order_rect( &ordered );
if (IsRectEmpty( &ordered )) ordered = empty;
ret = redraw_window_rects( hwnd, flags, &ordered, 1 );
}
else if (!hrgn)
{
ret = redraw_window_rects( hwnd, flags, NULL, 0 );
}
else /* need to build a list of the region rectangles */
{
DWORD size;
RGNDATA *data;
if (!(size = NtGdiGetRegionData( hrgn, 0, NULL ))) return FALSE;
if (!(data = malloc( size ))) return FALSE;
NtGdiGetRegionData( hrgn, size, data );
if (!data->rdh.nCount) /* empty region -> use a single all-zero rectangle */
ret = redraw_window_rects( hwnd, flags, &empty, 1 );
else
ret = redraw_window_rects( hwnd, flags, (const RECT *)data->Buffer, data->rdh.nCount );
free( data );
}
if (!hwnd) hwnd = get_desktop_window();
if (flags & RDW_UPDATENOW) update_now( hwnd, flags );
else if (flags & RDW_ERASENOW) erase_now( hwnd, flags );
return ret;
}
/***********************************************************************
* NtUserGetUpdateRgn (win32u.@)
*/
INT WINAPI NtUserGetUpdateRgn( HWND hwnd, HRGN hrgn, BOOL erase )
{
DPI_AWARENESS_CONTEXT context;
INT retval = ERROR;
UINT flags = UPDATE_NOCHILDREN;
HRGN update_rgn;
context = set_thread_dpi_awareness_context( get_window_dpi_awareness_context( hwnd ));
if (erase) flags |= UPDATE_NONCLIENT | UPDATE_ERASE;
if ((update_rgn = send_ncpaint( hwnd, NULL, &flags )))
{
retval = NtGdiCombineRgn( hrgn, update_rgn, 0, RGN_COPY );
if (send_erase( hwnd, flags, update_rgn, NULL, NULL ))
{
flags = UPDATE_DELAYED_ERASE;
get_update_flags( hwnd, NULL, &flags );
}
/* map region to client coordinates */
map_window_region( 0, hwnd, hrgn );
}
set_thread_dpi_awareness_context( context );
return retval;
}
/***********************************************************************
* NtUserGetUpdateRect (win32u.@)
*/
BOOL WINAPI NtUserGetUpdateRect( HWND hwnd, RECT *rect, BOOL erase )
{
UINT flags = UPDATE_NOCHILDREN;
HRGN update_rgn;
BOOL need_erase;
if (erase) flags |= UPDATE_NONCLIENT | UPDATE_ERASE;
if (!(update_rgn = send_ncpaint( hwnd, NULL, &flags ))) return FALSE;
if (rect && NtGdiGetRgnBox( update_rgn, rect ) != NULLREGION)
{
HDC hdc = NtUserGetDCEx( hwnd, 0, DCX_USESTYLE );
DWORD layout = NtGdiSetLayout( hdc, -1, 0 ); /* map_window_points mirrors already */
UINT win_dpi = get_dpi_for_window( hwnd );
map_window_points( 0, hwnd, (POINT *)rect, 2, win_dpi );
*rect = map_dpi_rect( *rect, win_dpi, get_thread_dpi() );
NtGdiTransformPoints( hdc, (POINT *)rect, (POINT *)rect, 2, NtGdiDPtoLP );
NtGdiSetLayout( hdc, -1, layout );
NtUserReleaseDC( hwnd, hdc );
}
need_erase = send_erase( hwnd, flags, update_rgn, NULL, NULL );
/* check if we still have an update region */
flags = UPDATE_PAINT | UPDATE_NOCHILDREN;
if (need_erase) flags |= UPDATE_DELAYED_ERASE;
return get_update_flags( hwnd, NULL, &flags ) && (flags & UPDATE_PAINT);
}
/***********************************************************************
* NtUserExcludeUpdateRgn (win32u.@)
*/
INT WINAPI NtUserExcludeUpdateRgn( HDC hdc, HWND hwnd )
{
HRGN update_rgn = NtGdiCreateRectRgn( 0, 0, 0, 0 );
INT ret = NtUserGetUpdateRgn( hwnd, update_rgn, FALSE );
if (ret != ERROR)
{
DPI_AWARENESS_CONTEXT context;
POINT pt;
context = set_thread_dpi_awareness_context( get_window_dpi_awareness_context( hwnd ));
NtGdiGetDCPoint( hdc, NtGdiGetDCOrg, &pt );
map_window_points( 0, hwnd, &pt, 1, get_thread_dpi() );
NtGdiOffsetRgn( update_rgn, -pt.x, -pt.y );
ret = NtGdiExtSelectClipRgn( hdc, update_rgn, RGN_DIFF );
set_thread_dpi_awareness_context( context );
}
NtGdiDeleteObjectApp( update_rgn );
return ret;
}
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