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Sweden-Number/dlls/ddraw/clipper.c

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/* DirectDrawClipper implementation
*
* Copyright 2000 (c) Marcus Meissner
* Copyright 2000 (c) TransGaming Technologies Inc.
* Copyright 2006 (c) Stefan Dösinger
*
* 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
*/
#include "ddraw_private.h"
WINE_DEFAULT_DEBUG_CHANNEL(ddraw);
static const struct IDirectDrawClipperVtbl ddraw_clipper_vtbl;
static inline struct ddraw_clipper *impl_from_IDirectDrawClipper(IDirectDrawClipper *iface)
{
return CONTAINING_RECORD(iface, struct ddraw_clipper, IDirectDrawClipper_iface);
}
BOOL ddraw_clipper_is_valid(const struct ddraw_clipper *clipper)
{
/* Native is very lenient when you invoke the clipper methods with a clipper pointer that
* points to something that is either not accessible or not a clipper, or if you break
* a clipper after assigning it to a surface. Deus Ex: Goty depends on this. */
if (IsBadReadPtr(clipper, sizeof(*clipper)))
{
WARN("The application gave us an invalid clipper pointer %p.\n", clipper);
return FALSE;
}
if (clipper->IDirectDrawClipper_iface.lpVtbl != &ddraw_clipper_vtbl)
{
WARN("The clipper vtable is modified: %p, expected %p.\n",
clipper->IDirectDrawClipper_iface.lpVtbl, &ddraw_clipper_vtbl);
return FALSE;
}
return TRUE;
}
static HRESULT WINAPI ddraw_clipper_QueryInterface(IDirectDrawClipper *iface, REFIID iid, void **object)
{
struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
TRACE("iface %p, iid %s, object %p.\n", iface, debugstr_guid(iid), object);
if (!ddraw_clipper_is_valid(clipper))
return DDERR_INVALIDPARAMS;
if (IsEqualGUID(&IID_IDirectDrawClipper, iid)
|| IsEqualGUID(&IID_IUnknown, iid))
{
IDirectDrawClipper_AddRef(&clipper->IDirectDrawClipper_iface);
*object = &clipper->IDirectDrawClipper_iface;
return S_OK;
}
WARN("%s not implemented, returning E_NOINTERFACE.\n", debugstr_guid(iid));
*object = NULL;
return E_NOINTERFACE;
}
static ULONG WINAPI ddraw_clipper_AddRef(IDirectDrawClipper *iface)
{
struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
ULONG refcount;
if (!ddraw_clipper_is_valid(clipper))
{
WARN("Invalid clipper, returning 0.\n");
return 0;
}
refcount = InterlockedIncrement(&clipper->ref);
TRACE("%p increasing refcount to %lu.\n", clipper, refcount);
return refcount;
}
static ULONG WINAPI ddraw_clipper_Release(IDirectDrawClipper *iface)
{
struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
ULONG refcount;
if (!ddraw_clipper_is_valid(clipper))
{
WARN("Invalid clipper, returning 0.\n");
return 0;
}
refcount = InterlockedDecrement(&clipper->ref);
TRACE("%p decreasing refcount to %lu.\n", clipper, refcount);
if (!refcount)
{
if (clipper->region)
DeleteObject(clipper->region);
clipper->IDirectDrawClipper_iface.lpVtbl = NULL; /* Should help with detecting freed clippers. */
heap_free(clipper);
}
return refcount;
}
static HRESULT WINAPI ddraw_clipper_SetHWnd(IDirectDrawClipper *iface, DWORD flags, HWND window)
{
struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
TRACE("iface %p, flags %#lx, window %p.\n", iface, flags, window);
if (!ddraw_clipper_is_valid(clipper))
return DDERR_INVALIDPARAMS;
if (flags)
{
FIXME("flags %#lx, not supported.\n", flags);
return DDERR_INVALIDPARAMS;
}
wined3d_mutex_lock();
clipper->window = window;
wined3d_mutex_unlock();
return DD_OK;
}
static HRGN get_window_region(HWND window)
{
POINT origin;
HRGN rgn;
HDC dc;
if (!(dc = GetDC(window)))
{
WARN("Failed to get dc.\n");
return NULL;
}
if (!(rgn = CreateRectRgn(0, 0, 0, 0)))
{
ERR("Failed to create region.\n");
ReleaseDC(window, dc);
return NULL;
}
if (GetRandomRgn(dc, rgn, SYSRGN) != 1)
{
ERR("Failed to get window region.\n");
DeleteObject(rgn);
ReleaseDC(window, dc);
return NULL;
}
if (GetVersion() & 0x80000000)
{
GetDCOrgEx(dc, &origin);
OffsetRgn(rgn, origin.x, origin.y);
}
ReleaseDC(window, dc);
return rgn;
}
/*****************************************************************************
* IDirectDrawClipper::GetClipList
*
* Retrieve a copy of the clip list
*
* Arguments:
* rect: Rectangle to be used to clip the clip list or NULL for the
* entire clip list.
* clip_list: structure for the resulting copy of the clip list.
* If NULL, fills Size up to the number of bytes necessary to hold
* the entire clip.
* clip_list_size: Size of resulting clip list; size of the buffer at clip_list
* or, if clip_list is NULL, receives the required size of the buffer
* in bytes.
*
* RETURNS
* Either DD_OK or DDERR_*
************************************************************************/
static HRESULT WINAPI ddraw_clipper_GetClipList(IDirectDrawClipper *iface, RECT *rect,
RGNDATA *clip_list, DWORD *clip_list_size)
{
struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
HRGN region;
TRACE("iface %p, rect %s, clip_list %p, clip_list_size %p.\n",
iface, wine_dbgstr_rect(rect), clip_list, clip_list_size);
if (!ddraw_clipper_is_valid(clipper))
return DDERR_INVALIDPARAMS;
wined3d_mutex_lock();
if (clipper->window)
{
if (!(region = get_window_region(clipper->window)))
{
wined3d_mutex_unlock();
WARN("Failed to get window region.\n");
return E_FAIL;
}
}
else
{
if (!(region = clipper->region))
{
wined3d_mutex_unlock();
WARN("No clip list set.\n");
return DDERR_NOCLIPLIST;
}
}
if (rect)
{
HRGN clip_region;
if (!(clip_region = CreateRectRgnIndirect(rect)))
{
wined3d_mutex_unlock();
ERR("Failed to create region.\n");
if (clipper->window)
DeleteObject(region);
return E_FAIL;
}
if (CombineRgn(clip_region, region, clip_region, RGN_AND) == ERROR)
{
wined3d_mutex_unlock();
ERR("Failed to combine regions.\n");
DeleteObject(clip_region);
if (clipper->window)
DeleteObject(region);
return E_FAIL;
}
if (clipper->window)
DeleteObject(region);
region = clip_region;
}
*clip_list_size = GetRegionData(region, *clip_list_size, clip_list);
if (rect || clipper->window)
DeleteObject(region);
wined3d_mutex_unlock();
return DD_OK;
}
/*****************************************************************************
* IDirectDrawClipper::SetClipList
*
* Sets or deletes (if region is NULL) the clip list
*
* This implementation is a stub and returns DD_OK always to make the app
* happy.
*
* PARAMS
* region Pointer to a LRGNDATA structure or NULL
* flags not used, must be 0
* RETURNS
* Either DD_OK or DDERR_*
*****************************************************************************/
static HRESULT WINAPI ddraw_clipper_SetClipList(IDirectDrawClipper *iface, RGNDATA *region, DWORD flags)
{
struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
TRACE("iface %p, region %p, flags %#lx.\n", iface, region, flags);
if (!ddraw_clipper_is_valid(clipper))
return DDERR_INVALIDPARAMS;
wined3d_mutex_lock();
if (clipper->window)
{
wined3d_mutex_unlock();
return DDERR_CLIPPERISUSINGHWND;
}
if (clipper->region)
DeleteObject(clipper->region);
if (!region)
clipper->region = NULL;
else if (!(clipper->region = ExtCreateRegion(NULL, 0, region)))
{
wined3d_mutex_unlock();
ERR("Failed to create region.\n");
return E_FAIL;
}
wined3d_mutex_unlock();
return DD_OK;
}
static HRESULT WINAPI ddraw_clipper_GetHWnd(IDirectDrawClipper *iface, HWND *window)
{
struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
TRACE("iface %p, window %p.\n", iface, window);
if (!ddraw_clipper_is_valid(clipper))
return DDERR_INVALIDPARAMS;
wined3d_mutex_lock();
*window = clipper->window;
wined3d_mutex_unlock();
return DD_OK;
}
static HRESULT WINAPI ddraw_clipper_Initialize(IDirectDrawClipper *iface,
IDirectDraw *ddraw, DWORD flags)
{
struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
TRACE("iface %p, ddraw %p, flags %#lx.\n", iface, ddraw, flags);
if (!ddraw_clipper_is_valid(clipper))
return DDERR_INVALIDPARAMS;
wined3d_mutex_lock();
if (clipper->initialized)
{
wined3d_mutex_unlock();
return DDERR_ALREADYINITIALIZED;
}
clipper->initialized = TRUE;
wined3d_mutex_unlock();
return DD_OK;
}
static HRESULT WINAPI ddraw_clipper_IsClipListChanged(IDirectDrawClipper *iface, BOOL *changed)
{
struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
FIXME("iface %p, changed %p stub!\n", iface, changed);
if (!ddraw_clipper_is_valid(clipper))
return DDERR_INVALIDPARAMS;
/* XXX What is safest? */
*changed = FALSE;
return DD_OK;
}
static const struct IDirectDrawClipperVtbl ddraw_clipper_vtbl =
{
ddraw_clipper_QueryInterface,
ddraw_clipper_AddRef,
ddraw_clipper_Release,
ddraw_clipper_GetClipList,
ddraw_clipper_GetHWnd,
ddraw_clipper_Initialize,
ddraw_clipper_IsClipListChanged,
ddraw_clipper_SetClipList,
ddraw_clipper_SetHWnd,
};
HRESULT ddraw_clipper_init(struct ddraw_clipper *clipper)
{
clipper->IDirectDrawClipper_iface.lpVtbl = &ddraw_clipper_vtbl;
clipper->ref = 1;
return DD_OK;
}
struct ddraw_clipper *unsafe_impl_from_IDirectDrawClipper(IDirectDrawClipper *iface)
{
if (!iface)
return NULL;
assert(iface->lpVtbl == &ddraw_clipper_vtbl);
return impl_from_IDirectDrawClipper(iface);
}
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