dlls/ddraw/clipper.c

   1 /* DirectDrawClipper implementation
   2  *
   3  * Copyright 2000 (c) Marcus Meissner
   4  * Copyright 2000 (c) TransGaming Technologies Inc.
   5  * Copyright 2006 (c) Stefan Dösinger
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include "config.h"
  23 #include "wine/port.h"
  24
  25 #include "ddraw_private.h"
  26
  27 WINE_DEFAULT_DEBUG_CHANNEL(ddraw);
  28
  29 static inline struct ddraw_clipper *impl_from_IDirectDrawClipper(IDirectDrawClipper *iface)
  30 {
  31     return CONTAINING_RECORD(iface, struct ddraw_clipper, IDirectDrawClipper_iface);
  32 }
  33
  34 static HRESULT WINAPI ddraw_clipper_QueryInterface(IDirectDrawClipper *iface, REFIID iid, void **object)
  35 {
  36     struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
  37
  38     TRACE("iface %p, iid %s, object %p.\n", iface, debugstr_guid(iid), object);
  39
  40     if (IsEqualGUID(&IID_IDirectDrawClipper, iid)
  41             || IsEqualGUID(&IID_IUnknown, iid))
  42     {
  43         IDirectDrawClipper_AddRef(&clipper->IDirectDrawClipper_iface);
  44         *object = &clipper->IDirectDrawClipper_iface;
  45         return S_OK;
  46     }
  47
  48     WARN("%s not implemented, returning E_NOINTERFACE.\n", debugstr_guid(iid));
  49     *object = NULL;
  50
  51     return E_NOINTERFACE;
  52 }
  53
  54 static ULONG WINAPI ddraw_clipper_AddRef(IDirectDrawClipper *iface)
  55 {
  56     struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
  57     ULONG refcount = InterlockedIncrement(&clipper->ref);
  58
  59     TRACE("%p increasing refcount to %u.\n", clipper, refcount);
  60
  61     return refcount;
  62 }
  63
  64 static ULONG WINAPI ddraw_clipper_Release(IDirectDrawClipper *iface)
  65 {
  66     struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
  67     ULONG refcount = InterlockedDecrement(&clipper->ref);
  68
  69     TRACE("%p decreasing refcount to %u.\n", clipper, refcount);
  70
  71     if (!refcount)
  72     {
  73         if (clipper->region)
  74             DeleteObject(clipper->region);
  75         HeapFree(GetProcessHeap(), 0, clipper);
  76     }
  77
  78     return refcount;
  79 }
  80
  81 static HRESULT WINAPI ddraw_clipper_SetHWnd(IDirectDrawClipper *iface, DWORD flags, HWND window)
  82 {
  83     struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
  84
  85     TRACE("iface %p, flags %#x, window %p.\n", iface, flags, window);
  86
  87     if (flags)
  88     {
  89         FIXME("flags %#x, not supported.\n", flags);
  90         return DDERR_INVALIDPARAMS;
  91     }
  92
  93     wined3d_mutex_lock();
  94     clipper->window = window;
  95     wined3d_mutex_unlock();
  96
  97     return DD_OK;
  98 }
  99
 100 static HRGN get_window_region(HWND window)
 101 {
 102     POINT origin;
 103     HRGN rgn;
 104     HDC dc;
 105
 106     if (!(dc = GetDC(window)))
 107     {
 108         WARN("Failed to get dc.\n");
 109         return NULL;
 110     }
 111
 112     if (!(rgn = CreateRectRgn(0, 0, 0, 0)))
 113     {
 114         ERR("Failed to create region.\n");
 115         ReleaseDC(window, dc);
 116         return NULL;
 117     }
 118
 119     if (GetRandomRgn(dc, rgn, SYSRGN) != 1)
 120     {
 121         ERR("Failed to get window region.\n");
 122         DeleteObject(rgn);
 123         ReleaseDC(window, dc);
 124         return NULL;
 125     }
 126
 127     if (GetVersion() & 0x80000000)
 128     {
 129         GetDCOrgEx(dc, &origin);
 130         OffsetRgn(rgn, origin.x, origin.y);
 131     }
 132
 133     ReleaseDC(window, dc);
 134     return rgn;
 135 }
 136
 137 /*****************************************************************************
 138  * IDirectDrawClipper::GetClipList
 139  *
 140  * Retrieve a copy of the clip list
 141  *
 142  * Arguments:
 143  *  rect: Rectangle to be used to clip the clip list or NULL for the
 144  *      entire clip list.
 145  *  clip_list: structure for the resulting copy of the clip list.
 146  *      If NULL, fills Size up to the number of bytes necessary to hold
 147  *      the entire clip.
 148  *  clip_list_size: Size of resulting clip list; size of the buffer at clip_list
 149  *      or, if clip_list is NULL, receives the required size of the buffer
 150  *      in bytes.
 151  *
 152  * RETURNS
 153  *  Either DD_OK or DDERR_*
 154  ************************************************************************/
 155 static HRESULT WINAPI ddraw_clipper_GetClipList(IDirectDrawClipper *iface, RECT *rect,
 156         RGNDATA *clip_list, DWORD *clip_list_size)
 157 {
 158     struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
 159     HRGN region;
 160
 161     TRACE("iface %p, rect %s, clip_list %p, clip_list_size %p.\n",
 162             iface, wine_dbgstr_rect(rect), clip_list, clip_list_size);
 163
 164     wined3d_mutex_lock();
 165
 166     if (clipper->window)
 167     {
 168         if (!(region = get_window_region(clipper->window)))
 169         {
 170             wined3d_mutex_unlock();
 171             WARN("Failed to get window region.\n");
 172             return E_FAIL;
 173         }
 174     }
 175     else
 176     {
 177         if (!(region = clipper->region))
 178         {
 179             wined3d_mutex_unlock();
 180             WARN("No clip list set.\n");
 181             return DDERR_NOCLIPLIST;
 182         }
 183     }
 184
 185     if (rect)
 186     {
 187         HRGN clip_region;
 188
 189         if (!(clip_region = CreateRectRgnIndirect(rect)))
 190         {
 191             wined3d_mutex_unlock();
 192             ERR("Failed to create region.\n");
 193             if (clipper->window)
 194                 DeleteObject(region);
 195             return E_FAIL;
 196         }
 197
 198         if (CombineRgn(clip_region, region, clip_region, RGN_AND) == ERROR)
 199         {
 200             wined3d_mutex_unlock();
 201             ERR("Failed to combine regions.\n");
 202             DeleteObject(clip_region);
 203             if (clipper->window)
 204                 DeleteObject(region);
 205             return E_FAIL;
 206         }
 207
 208         if (clipper->window)
 209             DeleteObject(region);
 210         region = clip_region;
 211     }
 212
 213     *clip_list_size = GetRegionData(region, *clip_list_size, clip_list);
 214     if (rect || clipper->window)
 215         DeleteObject(region);
 216
 217     wined3d_mutex_unlock();
 218     return DD_OK;
 219 }
 220
 221 /*****************************************************************************
 222  * IDirectDrawClipper::SetClipList
 223  *
 224  * Sets or deletes (if region is NULL) the clip list
 225  *
 226  * This implementation is a stub and returns DD_OK always to make the app
 227  * happy.
 228  *
 229  * PARAMS
 230  *  region  Pointer to a LRGNDATA structure or NULL
 231  *  flags   not used, must be 0
 232  * RETURNS
 233  *  Either DD_OK or DDERR_*
 234  *****************************************************************************/
 235 static HRESULT WINAPI ddraw_clipper_SetClipList(IDirectDrawClipper *iface, RGNDATA *region, DWORD flags)
 236 {
 237     struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
 238
 239     TRACE("iface %p, region %p, flags %#x.\n", iface, region, flags);
 240
 241     wined3d_mutex_lock();
 242
 243     if (clipper->window)
 244     {
 245         wined3d_mutex_unlock();
 246         return DDERR_CLIPPERISUSINGHWND;
 247     }
 248
 249     if (clipper->region)
 250         DeleteObject(clipper->region);
 251     if (!region)
 252         clipper->region = NULL;
 253     else if (!(clipper->region = ExtCreateRegion(NULL, 0, region)))
 254     {
 255         wined3d_mutex_unlock();
 256         ERR("Failed to create region.\n");
 257         return E_FAIL;
 258     }
 259
 260     wined3d_mutex_unlock();
 261
 262     return DD_OK;
 263 }
 264
 265 static HRESULT WINAPI ddraw_clipper_GetHWnd(IDirectDrawClipper *iface, HWND *window)
 266 {
 267     struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
 268
 269     TRACE("iface %p, window %p.\n", iface, window);
 270
 271     wined3d_mutex_lock();
 272     *window = clipper->window;
 273     wined3d_mutex_unlock();
 274
 275     return DD_OK;
 276 }
 277
 278 static HRESULT WINAPI ddraw_clipper_Initialize(IDirectDrawClipper *iface,
 279         IDirectDraw *ddraw, DWORD flags)
 280 {
 281     struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
 282
 283     TRACE("iface %p, ddraw %p, flags %#x.\n", iface, ddraw, flags);
 284
 285     wined3d_mutex_lock();
 286     if (clipper->initialized)
 287     {
 288         wined3d_mutex_unlock();
 289         return DDERR_ALREADYINITIALIZED;
 290     }
 291
 292     clipper->initialized = TRUE;
 293     wined3d_mutex_unlock();
 294
 295     return DD_OK;
 296 }
 297
 298 static HRESULT WINAPI ddraw_clipper_IsClipListChanged(IDirectDrawClipper *iface, BOOL *changed)
 299 {
 300     FIXME("iface %p, changed %p stub!\n", iface, changed);
 301
 302     /* XXX What is safest? */
 303     *changed = FALSE;
 304
 305     return DD_OK;
 306 }
 307
 308 static const struct IDirectDrawClipperVtbl ddraw_clipper_vtbl =
 309 {
 310     ddraw_clipper_QueryInterface,
 311     ddraw_clipper_AddRef,
 312     ddraw_clipper_Release,
 313     ddraw_clipper_GetClipList,
 314     ddraw_clipper_GetHWnd,
 315     ddraw_clipper_Initialize,
 316     ddraw_clipper_IsClipListChanged,
 317     ddraw_clipper_SetClipList,
 318     ddraw_clipper_SetHWnd,
 319 };
 320
 321 HRESULT ddraw_clipper_init(struct ddraw_clipper *clipper)
 322 {
 323     clipper->IDirectDrawClipper_iface.lpVtbl = &ddraw_clipper_vtbl;
 324     clipper->ref = 1;
 325
 326     return DD_OK;
 327 }
 328
 329 struct ddraw_clipper *unsafe_impl_from_IDirectDrawClipper(IDirectDrawClipper *iface)
 330 {
 331     if (!iface)
 332         return NULL;
 333     assert(iface->lpVtbl == &ddraw_clipper_vtbl);
 334
 335     return impl_from_IDirectDrawClipper(iface);
 336 }