dlls/wined3d/swapchain.c

   1 /*
   2  * Copyright 2002-2003 Jason Edmeades
   3  * Copyright 2002-2003 Raphael Junqueira
   4  * Copyright 2005 Oliver Stieber
   5  * Copyright 2007-2008 Stefan Dösinger for CodeWeavers
   6  * Copyright 2011 Henri Verbeet for CodeWeavers
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 #include "config.h"
  24 #include "wine/port.h"
  25 #include "wined3d_private.h"
  26
  27 WINE_DEFAULT_DEBUG_CHANNEL(d3d);
  28 WINE_DECLARE_DEBUG_CHANNEL(fps);
  29
  30 static void swapchain_cleanup(struct wined3d_swapchain *swapchain)
  31 {
  32     HRESULT hr;
  33     UINT i;
  34
  35     TRACE("Destroying swapchain %p.\n", swapchain);
  36
  37     wined3d_swapchain_set_gamma_ramp(swapchain, 0, &swapchain->orig_gamma);
  38
  39     /* Release the swapchain's draw buffers. Make sure swapchain->back_buffers[0]
  40      * is the last buffer to be destroyed, FindContext() depends on that. */
  41     if (swapchain->front_buffer)
  42     {
  43         surface_set_swapchain(swapchain->front_buffer, NULL);
  44         if (wined3d_surface_decref(swapchain->front_buffer))
  45             WARN("Something's still holding the front buffer (%p).\n", swapchain->front_buffer);
  46         swapchain->front_buffer = NULL;
  47     }
  48
  49     if (swapchain->back_buffers)
  50     {
  51         i = swapchain->desc.backbuffer_count;
  52
  53         while (i--)
  54         {
  55             surface_set_swapchain(swapchain->back_buffers[i], NULL);
  56             if (wined3d_surface_decref(swapchain->back_buffers[i]))
  57                 WARN("Something's still holding back buffer %u (%p).\n", i, swapchain->back_buffers[i]);
  58         }
  59         HeapFree(GetProcessHeap(), 0, swapchain->back_buffers);
  60         swapchain->back_buffers = NULL;
  61     }
  62
  63     for (i = 0; i < swapchain->num_contexts; ++i)
  64     {
  65         context_destroy(swapchain->device, swapchain->context[i]);
  66     }
  67     HeapFree(GetProcessHeap(), 0, swapchain->context);
  68
  69     /* Restore the screen resolution if we rendered in fullscreen.
  70      * This will restore the screen resolution to what it was before creating
  71      * the swapchain. In case of d3d8 and d3d9 this will be the original
  72      * desktop resolution. In case of d3d7 this will be a NOP because ddraw
  73      * sets the resolution before starting up Direct3D, thus orig_width and
  74      * orig_height will be equal to the modes in the presentation params. */
  75     if (!swapchain->desc.windowed && swapchain->desc.auto_restore_display_mode)
  76     {
  77         if (FAILED(hr = wined3d_set_adapter_display_mode(swapchain->device->wined3d,
  78                 swapchain->device->adapter->ordinal, &swapchain->original_mode)))
  79             ERR("Failed to restore display mode, hr %#x.\n", hr);
  80     }
  81
  82     if (swapchain->backup_dc)
  83     {
  84         TRACE("Destroying backup wined3d window %p, dc %p.\n", swapchain->backup_wnd, swapchain->backup_dc);
  85
  86         wined3d_release_dc(swapchain->backup_wnd, swapchain->backup_dc);
  87         DestroyWindow(swapchain->backup_wnd);
  88     }
  89 }
  90
  91 ULONG CDECL wined3d_swapchain_incref(struct wined3d_swapchain *swapchain)
  92 {
  93     ULONG refcount = InterlockedIncrement(&swapchain->ref);
  94
  95     TRACE("%p increasing refcount to %u.\n", swapchain, refcount);
  96
  97     return refcount;
  98 }
  99
 100 ULONG CDECL wined3d_swapchain_decref(struct wined3d_swapchain *swapchain)
 101 {
 102     ULONG refcount = InterlockedDecrement(&swapchain->ref);
 103
 104     TRACE("%p decreasing refcount to %u.\n", swapchain, refcount);
 105
 106     if (!refcount)
 107     {
 108         swapchain_cleanup(swapchain);
 109         swapchain->parent_ops->wined3d_object_destroyed(swapchain->parent);
 110         HeapFree(GetProcessHeap(), 0, swapchain);
 111     }
 112
 113     return refcount;
 114 }
 115
 116 void * CDECL wined3d_swapchain_get_parent(const struct wined3d_swapchain *swapchain)
 117 {
 118     TRACE("swapchain %p.\n", swapchain);
 119
 120     return swapchain->parent;
 121 }
 122
 123 void CDECL wined3d_swapchain_set_window(struct wined3d_swapchain *swapchain, HWND window)
 124 {
 125     if (!window)
 126         window = swapchain->device_window;
 127     if (window == swapchain->win_handle)
 128         return;
 129
 130     TRACE("Setting swapchain %p window from %p to %p.\n",
 131             swapchain, swapchain->win_handle, window);
 132     swapchain->win_handle = window;
 133 }
 134
 135 HRESULT CDECL wined3d_swapchain_present(struct wined3d_swapchain *swapchain,
 136         const RECT *src_rect, const RECT *dst_rect, HWND dst_window_override,
 137         const RGNDATA *dirty_region, DWORD flags)
 138 {
 139     TRACE("swapchain %p, src_rect %s, dst_rect %s, dst_window_override %p, dirty_region %p, flags %#x.\n",
 140             swapchain, wine_dbgstr_rect(src_rect), wine_dbgstr_rect(dst_rect),
 141             dst_window_override, dirty_region, flags);
 142
 143     if (flags)
 144         FIXME("Ignoring flags %#x.\n", flags);
 145
 146     if (!swapchain->back_buffers)
 147     {
 148         WARN("Swapchain doesn't have a backbuffer, returning WINED3DERR_INVALIDCALL\n");
 149         return WINED3DERR_INVALIDCALL;
 150     }
 151
 152     wined3d_cs_emit_present(swapchain->device->cs, swapchain, src_rect,
 153             dst_rect, dst_window_override, dirty_region, flags);
 154
 155     return WINED3D_OK;
 156 }
 157
 158 HRESULT CDECL wined3d_swapchain_get_front_buffer_data(const struct wined3d_swapchain *swapchain,
 159         struct wined3d_surface *dst_surface)
 160 {
 161     struct wined3d_surface *src_surface;
 162     RECT src_rect, dst_rect;
 163
 164     TRACE("swapchain %p, dst_surface %p.\n", swapchain, dst_surface);
 165
 166     src_surface = swapchain->front_buffer;
 167     SetRect(&src_rect, 0, 0, src_surface->resource.width, src_surface->resource.height);
 168     dst_rect = src_rect;
 169
 170     if (swapchain->desc.windowed)
 171     {
 172         MapWindowPoints(swapchain->win_handle, NULL, (POINT *)&dst_rect, 2);
 173         FIXME("Using destination rect %s in windowed mode, this is likely wrong.\n",
 174                 wine_dbgstr_rect(&dst_rect));
 175     }
 176
 177     return wined3d_surface_blt(dst_surface, &dst_rect, src_surface, &src_rect, 0, NULL, WINED3D_TEXF_POINT);
 178 }
 179
 180 struct wined3d_surface * CDECL wined3d_swapchain_get_back_buffer(const struct wined3d_swapchain *swapchain,
 181         UINT back_buffer_idx, enum wined3d_backbuffer_type type)
 182 {
 183     TRACE("swapchain %p, back_buffer_idx %u, type %#x.\n",
 184             swapchain, back_buffer_idx, type);
 185
 186     /* Return invalid if there is no backbuffer array, otherwise it will
 187      * crash when ddraw is used (there swapchain->back_buffers is always
 188      * NULL). We need this because this function is called from
 189      * stateblock_init_default_state() to get the default scissorrect
 190      * dimensions. */
 191     if (!swapchain->back_buffers || back_buffer_idx >= swapchain->desc.backbuffer_count)
 192     {
 193         WARN("Invalid back buffer index.\n");
 194         /* Native d3d9 doesn't set NULL here, just as wine's d3d9. But set it
 195          * here in wined3d to avoid problems in other libs. */
 196         return NULL;
 197     }
 198
 199     TRACE("Returning back buffer %p.\n", swapchain->back_buffers[back_buffer_idx]);
 200
 201     return swapchain->back_buffers[back_buffer_idx];
 202 }
 203
 204 HRESULT CDECL wined3d_swapchain_get_raster_status(const struct wined3d_swapchain *swapchain,
 205         struct wined3d_raster_status *raster_status)
 206 {
 207     TRACE("swapchain %p, raster_status %p.\n", swapchain, raster_status);
 208
 209     return wined3d_get_adapter_raster_status(swapchain->device->wined3d,
 210             swapchain->device->adapter->ordinal, raster_status);
 211 }
 212
 213 HRESULT CDECL wined3d_swapchain_get_display_mode(const struct wined3d_swapchain *swapchain,
 214         struct wined3d_display_mode *mode, enum wined3d_display_rotation *rotation)
 215 {
 216     HRESULT hr;
 217
 218     TRACE("swapchain %p, mode %p, rotation %p.\n", swapchain, mode, rotation);
 219
 220     hr = wined3d_get_adapter_display_mode(swapchain->device->wined3d,
 221             swapchain->device->adapter->ordinal, mode, rotation);
 222
 223     TRACE("Returning w %u, h %u, refresh rate %u, format %s.\n",
 224             mode->width, mode->height, mode->refresh_rate, debug_d3dformat(mode->format_id));
 225
 226     return hr;
 227 }
 228
 229 struct wined3d_device * CDECL wined3d_swapchain_get_device(const struct wined3d_swapchain *swapchain)
 230 {
 231     TRACE("swapchain %p.\n", swapchain);
 232
 233     return swapchain->device;
 234 }
 235
 236 void CDECL wined3d_swapchain_get_desc(const struct wined3d_swapchain *swapchain,
 237         struct wined3d_swapchain_desc *desc)
 238 {
 239     TRACE("swapchain %p, desc %p.\n", swapchain, desc);
 240
 241     *desc = swapchain->desc;
 242 }
 243
 244 HRESULT CDECL wined3d_swapchain_set_gamma_ramp(const struct wined3d_swapchain *swapchain,
 245         DWORD flags, const struct wined3d_gamma_ramp *ramp)
 246 {
 247     HDC dc;
 248
 249     TRACE("swapchain %p, flags %#x, ramp %p.\n", swapchain, flags, ramp);
 250
 251     if (flags)
 252         FIXME("Ignoring flags %#x.\n", flags);
 253
 254     dc = GetDC(swapchain->device_window);
 255     SetDeviceGammaRamp(dc, (void *)ramp);
 256     ReleaseDC(swapchain->device_window, dc);
 257
 258     return WINED3D_OK;
 259 }
 260
 261 void CDECL wined3d_swapchain_set_palette(struct wined3d_swapchain *swapchain, struct wined3d_palette *palette)
 262 {
 263     TRACE("swapchain %p, palette %p.\n", swapchain, palette);
 264     swapchain->palette = palette;
 265 }
 266
 267 HRESULT CDECL wined3d_swapchain_get_gamma_ramp(const struct wined3d_swapchain *swapchain,
 268         struct wined3d_gamma_ramp *ramp)
 269 {
 270     HDC dc;
 271
 272     TRACE("swapchain %p, ramp %p.\n", swapchain, ramp);
 273
 274     dc = GetDC(swapchain->device_window);
 275     GetDeviceGammaRamp(dc, ramp);
 276     ReleaseDC(swapchain->device_window, dc);
 277
 278     return WINED3D_OK;
 279 }
 280
 281 /* A GL context is provided by the caller */
 282 static void swapchain_blit(const struct wined3d_swapchain *swapchain,
 283         struct wined3d_context *context, const RECT *src_rect, const RECT *dst_rect)
 284 {
 285     struct wined3d_surface *backbuffer = swapchain->back_buffers[0];
 286     UINT src_w = src_rect->right - src_rect->left;
 287     UINT src_h = src_rect->bottom - src_rect->top;
 288     GLenum gl_filter;
 289     const struct wined3d_gl_info *gl_info = context->gl_info;
 290     RECT win_rect;
 291     UINT win_h;
 292
 293     TRACE("swapchain %p, context %p, src_rect %s, dst_rect %s.\n",
 294             swapchain, context, wine_dbgstr_rect(src_rect), wine_dbgstr_rect(dst_rect));
 295
 296     if (src_w == dst_rect->right - dst_rect->left && src_h == dst_rect->bottom - dst_rect->top)
 297         gl_filter = GL_NEAREST;
 298     else
 299         gl_filter = GL_LINEAR;
 300
 301     GetClientRect(swapchain->win_handle, &win_rect);
 302     win_h = win_rect.bottom - win_rect.top;
 303
 304     if (gl_info->fbo_ops.glBlitFramebuffer && is_identity_fixup(backbuffer->resource.format->color_fixup))
 305     {
 306         DWORD location = WINED3D_LOCATION_TEXTURE_RGB;
 307
 308         if (backbuffer->resource.multisample_type)
 309         {
 310             location = WINED3D_LOCATION_RB_RESOLVED;
 311             surface_load_location(backbuffer, location);
 312         }
 313
 314         context_apply_fbo_state_blit(context, GL_READ_FRAMEBUFFER, backbuffer, NULL, location);
 315         gl_info->gl_ops.gl.p_glReadBuffer(GL_COLOR_ATTACHMENT0);
 316         context_check_fbo_status(context, GL_READ_FRAMEBUFFER);
 317
 318         context_apply_fbo_state_blit(context, GL_DRAW_FRAMEBUFFER, swapchain->front_buffer,
 319                 NULL, WINED3D_LOCATION_DRAWABLE);
 320         context_set_draw_buffer(context, GL_BACK);
 321         context_invalidate_state(context, STATE_FRAMEBUFFER);
 322
 323         gl_info->gl_ops.gl.p_glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
 324         context_invalidate_state(context, STATE_RENDER(WINED3D_RS_COLORWRITEENABLE));
 325         context_invalidate_state(context, STATE_RENDER(WINED3D_RS_COLORWRITEENABLE1));
 326         context_invalidate_state(context, STATE_RENDER(WINED3D_RS_COLORWRITEENABLE2));
 327         context_invalidate_state(context, STATE_RENDER(WINED3D_RS_COLORWRITEENABLE3));
 328
 329         gl_info->gl_ops.gl.p_glDisable(GL_SCISSOR_TEST);
 330         context_invalidate_state(context, STATE_RENDER(WINED3D_RS_SCISSORTESTENABLE));
 331
 332         /* Note that the texture is upside down */
 333         gl_info->fbo_ops.glBlitFramebuffer(src_rect->left, src_rect->top, src_rect->right, src_rect->bottom,
 334                 dst_rect->left, win_h - dst_rect->top, dst_rect->right, win_h - dst_rect->bottom,
 335                 GL_COLOR_BUFFER_BIT, gl_filter);
 336         checkGLcall("Swapchain present blit(EXT_framebuffer_blit)\n");
 337     }
 338     else
 339     {
 340         struct wined3d_device *device = swapchain->device;
 341         struct wined3d_context *context2;
 342         float tex_left = src_rect->left;
 343         float tex_top = src_rect->top;
 344         float tex_right = src_rect->right;
 345         float tex_bottom = src_rect->bottom;
 346
 347         context2 = context_acquire(device, swapchain->back_buffers[0]);
 348         context_apply_blit_state(context2, device);
 349
 350         if (backbuffer->flags & SFLAG_NORMCOORD)
 351         {
 352             tex_left /= src_w;
 353             tex_right /= src_w;
 354             tex_top /= src_h;
 355             tex_bottom /= src_h;
 356         }
 357
 358         if (is_complex_fixup(backbuffer->resource.format->color_fixup))
 359             gl_filter = GL_NEAREST;
 360
 361         context_apply_fbo_state_blit(context2, GL_FRAMEBUFFER, swapchain->front_buffer,
 362                 NULL, WINED3D_LOCATION_DRAWABLE);
 363         context_bind_texture(context2, backbuffer->texture_target, backbuffer->container->texture_rgb.name);
 364
 365         /* Set up the texture. The surface is not in a wined3d_texture
 366          * container, so there are no D3D texture settings to dirtify. */
 367         device->blitter->set_shader(device->blit_priv, context2, backbuffer);
 368         gl_info->gl_ops.gl.p_glTexParameteri(backbuffer->texture_target, GL_TEXTURE_MIN_FILTER, gl_filter);
 369         gl_info->gl_ops.gl.p_glTexParameteri(backbuffer->texture_target, GL_TEXTURE_MAG_FILTER, gl_filter);
 370
 371         context_set_draw_buffer(context, GL_BACK);
 372
 373         /* Set the viewport to the destination rectandle, disable any projection
 374          * transformation set up by context_apply_blit_state(), and draw a
 375          * (-1,-1)-(1,1) quad.
 376          *
 377          * Back up viewport and matrix to avoid breaking last_was_blit
 378          *
 379          * Note that context_apply_blit_state() set up viewport and ortho to
 380          * match the surface size - we want the GL drawable(=window) size. */
 381         gl_info->gl_ops.gl.p_glPushAttrib(GL_VIEWPORT_BIT);
 382         gl_info->gl_ops.gl.p_glViewport(dst_rect->left, win_h - dst_rect->bottom,
 383                 dst_rect->right, win_h - dst_rect->top);
 384         gl_info->gl_ops.gl.p_glMatrixMode(GL_PROJECTION);
 385         gl_info->gl_ops.gl.p_glPushMatrix();
 386         gl_info->gl_ops.gl.p_glLoadIdentity();
 387
 388         gl_info->gl_ops.gl.p_glBegin(GL_QUADS);
 389             /* bottom left */
 390             gl_info->gl_ops.gl.p_glTexCoord2f(tex_left, tex_bottom);
 391             gl_info->gl_ops.gl.p_glVertex2i(-1, -1);
 392
 393             /* top left */
 394             gl_info->gl_ops.gl.p_glTexCoord2f(tex_left, tex_top);
 395             gl_info->gl_ops.gl.p_glVertex2i(-1, 1);
 396
 397             /* top right */
 398             gl_info->gl_ops.gl.p_glTexCoord2f(tex_right, tex_top);
 399             gl_info->gl_ops.gl.p_glVertex2i(1, 1);
 400
 401             /* bottom right */
 402             gl_info->gl_ops.gl.p_glTexCoord2f(tex_right, tex_bottom);
 403             gl_info->gl_ops.gl.p_glVertex2i(1, -1);
 404         gl_info->gl_ops.gl.p_glEnd();
 405
 406         gl_info->gl_ops.gl.p_glPopMatrix();
 407         gl_info->gl_ops.gl.p_glPopAttrib();
 408
 409         device->blitter->unset_shader(context->gl_info);
 410         checkGLcall("Swapchain present blit(manual)\n");
 411
 412         context_release(context2);
 413     }
 414 }
 415
 416 static void swapchain_gl_present(struct wined3d_swapchain *swapchain, const RECT *src_rect_in,
 417         const RECT *dst_rect_in, const RGNDATA *dirty_region, DWORD flags)
 418 {
 419     struct wined3d_surface *back_buffer = swapchain->back_buffers[0];
 420     const struct wined3d_fb_state *fb = &swapchain->device->fb;
 421     const struct wined3d_gl_info *gl_info;
 422     struct wined3d_context *context;
 423     RECT src_rect, dst_rect;
 424     BOOL render_to_fbo;
 425
 426     context = context_acquire(swapchain->device, back_buffer);
 427     if (!context->valid)
 428     {
 429         context_release(context);
 430         WARN("Invalid context, skipping present.\n");
 431         return;
 432     }
 433
 434     gl_info = context->gl_info;
 435
 436     if (swapchain->device->logo_texture)
 437     {
 438         struct wined3d_surface *src_surface = surface_from_resource(
 439                 wined3d_texture_get_sub_resource(swapchain->device->logo_texture, 0));
 440         RECT rect = {0, 0, src_surface->resource.width, src_surface->resource.height};
 441
 442         /* Blit the logo into the upper left corner of the drawable. */
 443         wined3d_surface_blt(back_buffer, &rect, src_surface, &rect, WINEDDBLT_ALPHATEST,
 444                 NULL, WINED3D_TEXF_POINT);
 445     }
 446
 447     if (swapchain->device->bCursorVisible && swapchain->device->cursor_texture
 448             && !swapchain->device->hardwareCursor)
 449     {
 450         struct wined3d_surface *cursor = surface_from_resource(
 451                 wined3d_texture_get_sub_resource(swapchain->device->cursor_texture, 0));
 452         RECT destRect =
 453         {
 454             swapchain->device->xScreenSpace - swapchain->device->xHotSpot,
 455             swapchain->device->yScreenSpace - swapchain->device->yHotSpot,
 456             swapchain->device->xScreenSpace + swapchain->device->cursorWidth - swapchain->device->xHotSpot,
 457             swapchain->device->yScreenSpace + swapchain->device->cursorHeight - swapchain->device->yHotSpot,
 458         };
 459
 460         TRACE("Rendering the software cursor.\n");
 461
 462         if (swapchain->desc.windowed)
 463             MapWindowPoints(NULL, swapchain->win_handle, (POINT *)&destRect, 2);
 464         wined3d_surface_blt(back_buffer, &destRect, cursor, NULL, WINEDDBLT_ALPHATEST,
 465                 NULL, WINED3D_TEXF_POINT);
 466     }
 467
 468     TRACE("Presenting HDC %p.\n", context->hdc);
 469
 470     render_to_fbo = swapchain->render_to_fbo;
 471
 472     if (src_rect_in)
 473     {
 474         src_rect = *src_rect_in;
 475         if (!render_to_fbo && (src_rect.left || src_rect.top
 476                 || src_rect.right != swapchain->desc.backbuffer_width
 477                 || src_rect.bottom != swapchain->desc.backbuffer_height))
 478         {
 479             render_to_fbo = TRUE;
 480         }
 481     }
 482     else
 483     {
 484         src_rect.left = 0;
 485         src_rect.top = 0;
 486         src_rect.right = swapchain->desc.backbuffer_width;
 487         src_rect.bottom = swapchain->desc.backbuffer_height;
 488     }
 489
 490     if (dst_rect_in)
 491         dst_rect = *dst_rect_in;
 492     else
 493         GetClientRect(swapchain->win_handle, &dst_rect);
 494
 495     if (!render_to_fbo && (dst_rect.left || dst_rect.top
 496             || dst_rect.right != swapchain->desc.backbuffer_width
 497             || dst_rect.bottom != swapchain->desc.backbuffer_height))
 498         render_to_fbo = TRUE;
 499
 500     /* Rendering to a window of different size, presenting partial rectangles,
 501      * or rendering to a different window needs help from FBO_blit or a textured
 502      * draw. Render the swapchain to a FBO in the future.
 503      *
 504      * Note that FBO_blit from the backbuffer to the frontbuffer cannot solve
 505      * all these issues - this fails if the window is smaller than the backbuffer.
 506      */
 507     if (!swapchain->render_to_fbo && render_to_fbo && wined3d_settings.offscreen_rendering_mode == ORM_FBO)
 508     {
 509         surface_load_location(back_buffer, WINED3D_LOCATION_TEXTURE_RGB);
 510         surface_invalidate_location(back_buffer, WINED3D_LOCATION_DRAWABLE);
 511         swapchain->render_to_fbo = TRUE;
 512         swapchain_update_draw_bindings(swapchain);
 513     }
 514     else
 515     {
 516         surface_load_location(back_buffer, back_buffer->draw_binding);
 517     }
 518
 519     if (swapchain->render_to_fbo)
 520     {
 521         static unsigned int once;
 522
 523         if (swapchain->desc.swap_effect == WINED3D_SWAP_EFFECT_FLIP && !once++)
 524             FIXME("WINED3D_SWAP_EFFECT_FLIP not implemented.\n");
 525
 526         swapchain_blit(swapchain, context, &src_rect, &dst_rect);
 527     }
 528
 529     if (swapchain->num_contexts > 1)
 530         gl_info->gl_ops.gl.p_glFinish();
 531
 532     /* call wglSwapBuffers through the gl table to avoid confusing the Steam overlay */
 533     gl_info->gl_ops.wgl.p_wglSwapBuffers(context->hdc); /* TODO: cycle through the swapchain buffers */
 534
 535     TRACE("SwapBuffers called, Starting new frame\n");
 536     /* FPS support */
 537     if (TRACE_ON(fps))
 538     {
 539         DWORD time = GetTickCount();
 540         ++swapchain->frames;
 541
 542         /* every 1.5 seconds */
 543         if (time - swapchain->prev_time > 1500)
 544         {
 545             TRACE_(fps)("%p @ approx %.2ffps\n",
 546                     swapchain, 1000.0 * swapchain->frames / (time - swapchain->prev_time));
 547             swapchain->prev_time = time;
 548             swapchain->frames = 0;
 549         }
 550     }
 551
 552     if (!swapchain->render_to_fbo && ((swapchain->front_buffer->locations & WINED3D_LOCATION_SYSMEM)
 553             || (back_buffer->locations & WINED3D_LOCATION_SYSMEM)))
 554     {
 555         /* Both memory copies of the surfaces are ok, flip them around too instead of dirtifying
 556          * Doesn't work with render_to_fbo because we're not flipping
 557          */
 558         struct wined3d_surface *front = swapchain->front_buffer;
 559
 560         if (front->resource.size == back_buffer->resource.size)
 561         {
 562             flip_surface(front, back_buffer);
 563
 564             /* Tell the front buffer surface that is has been modified. However,
 565              * the other locations were preserved during that, so keep the flags.
 566              * This serves to update the emulated overlay, if any. */
 567             surface_validate_location(front, WINED3D_LOCATION_DRAWABLE);
 568         }
 569         else
 570         {
 571             surface_validate_location(front, WINED3D_LOCATION_DRAWABLE);
 572             surface_invalidate_location(front, ~WINED3D_LOCATION_DRAWABLE);
 573             surface_validate_location(back_buffer, WINED3D_LOCATION_DRAWABLE);
 574             surface_invalidate_location(back_buffer, ~WINED3D_LOCATION_DRAWABLE);
 575         }
 576     }
 577     else
 578     {
 579         surface_validate_location(swapchain->front_buffer, WINED3D_LOCATION_DRAWABLE);
 580         surface_invalidate_location(swapchain->front_buffer, ~WINED3D_LOCATION_DRAWABLE);
 581         /* If the swapeffect is DISCARD, the back buffer is undefined. That means the SYSMEM
 582          * and INTEXTURE copies can keep their old content if they have any defined content.
 583          * If the swapeffect is COPY, the content remains the same. If it is FLIP however,
 584          * the texture / sysmem copy needs to be reloaded from the drawable
 585          */
 586         if (swapchain->desc.swap_effect == WINED3D_SWAP_EFFECT_FLIP)
 587         {
 588             surface_validate_location(back_buffer, back_buffer->draw_binding);
 589             surface_invalidate_location(back_buffer, ~back_buffer->draw_binding);
 590         }
 591     }
 592
 593     if (fb->depth_stencil)
 594     {
 595         if (swapchain->desc.flags & WINED3DPRESENTFLAG_DISCARD_DEPTHSTENCIL
 596                 || fb->depth_stencil->flags & SFLAG_DISCARD)
 597         {
 598             surface_modify_ds_location(fb->depth_stencil, WINED3D_LOCATION_DISCARDED,
 599                     fb->depth_stencil->resource.width,
 600                     fb->depth_stencil->resource.height);
 601             if (fb->depth_stencil == swapchain->device->onscreen_depth_stencil)
 602             {
 603                 wined3d_surface_decref(swapchain->device->onscreen_depth_stencil);
 604                 swapchain->device->onscreen_depth_stencil = NULL;
 605             }
 606         }
 607     }
 608
 609     context_release(context);
 610 }
 611
 612 static const struct wined3d_swapchain_ops swapchain_gl_ops =
 613 {
 614     swapchain_gl_present,
 615 };
 616
 617 /* Helper function that blits the front buffer contents to the target window. */
 618 void x11_copy_to_screen(const struct wined3d_swapchain *swapchain, const RECT *rect)
 619 {
 620     struct wined3d_surface *front;
 621     POINT offset = {0, 0};
 622     HDC src_dc, dst_dc;
 623     RECT draw_rect;
 624     HWND window;
 625
 626     TRACE("swapchain %p, rect %s.\n", swapchain, wine_dbgstr_rect(rect));
 627
 628     if (swapchain->palette)
 629         wined3d_palette_apply_to_dc(swapchain->palette, swapchain->front_buffer->hDC);
 630
 631     front = swapchain->front_buffer;
 632     if (front->resource.map_count)
 633         ERR("Trying to blit a mapped surface.\n");
 634
 635     TRACE("Copying surface %p to screen.\n", front);
 636
 637     surface_load_location(front, WINED3D_LOCATION_DIB);
 638
 639     src_dc = front->hDC;
 640     window = swapchain->win_handle;
 641     dst_dc = GetDCEx(window, 0, DCX_CLIPSIBLINGS | DCX_CACHE);
 642
 643     /* Front buffer coordinates are screen coordinates. Map them to the
 644      * destination window if not fullscreened. */
 645     if (swapchain->desc.windowed)
 646         ClientToScreen(window, &offset);
 647
 648     TRACE("offset %s.\n", wine_dbgstr_point(&offset));
 649
 650     draw_rect.left = 0;
 651     draw_rect.right = front->resource.width;
 652     draw_rect.top = 0;
 653     draw_rect.bottom = front->resource.height;
 654
 655     if (rect)
 656         IntersectRect(&draw_rect, &draw_rect, rect);
 657
 658     BitBlt(dst_dc, draw_rect.left - offset.x, draw_rect.top - offset.y,
 659             draw_rect.right - draw_rect.left, draw_rect.bottom - draw_rect.top,
 660             src_dc, draw_rect.left, draw_rect.top, SRCCOPY);
 661     ReleaseDC(window, dst_dc);
 662 }
 663
 664 static void swapchain_gdi_present(struct wined3d_swapchain *swapchain, const RECT *src_rect_in,
 665         const RECT *dst_rect_in, const RGNDATA *dirty_region, DWORD flags)
 666 {
 667     struct wined3d_surface *front, *back;
 668
 669     front = swapchain->front_buffer;
 670     back = swapchain->back_buffers[0];
 671
 672     /* Flip the DC. */
 673     {
 674         HDC tmp;
 675         tmp = front->hDC;
 676         front->hDC = back->hDC;
 677         back->hDC = tmp;
 678     }
 679
 680     /* Flip the DIBsection. */
 681     {
 682         HBITMAP tmp;
 683         tmp = front->dib.DIBsection;
 684         front->dib.DIBsection = back->dib.DIBsection;
 685         back->dib.DIBsection = tmp;
 686     }
 687
 688     /* Flip the surface data. */
 689     {
 690         void *tmp;
 691
 692         tmp = front->dib.bitmap_data;
 693         front->dib.bitmap_data = back->dib.bitmap_data;
 694         back->dib.bitmap_data = tmp;
 695
 696         if (front->resource.heap_memory)
 697             ERR("GDI Surface %p has heap memory allocated.\n", front);
 698
 699         if (back->resource.heap_memory)
 700             ERR("GDI Surface %p has heap memory allocated.\n", back);
 701     }
 702
 703     /* FPS support */
 704     if (TRACE_ON(fps))
 705     {
 706         static LONG prev_time, frames;
 707         DWORD time = GetTickCount();
 708
 709         ++frames;
 710
 711         /* every 1.5 seconds */
 712         if (time - prev_time > 1500)
 713         {
 714             TRACE_(fps)("@ approx %.2ffps\n", 1000.0 * frames / (time - prev_time));
 715             prev_time = time;
 716             frames = 0;
 717         }
 718     }
 719
 720     x11_copy_to_screen(swapchain, NULL);
 721 }
 722
 723 static const struct wined3d_swapchain_ops swapchain_gdi_ops =
 724 {
 725     swapchain_gdi_present,
 726 };
 727
 728 void swapchain_update_render_to_fbo(struct wined3d_swapchain *swapchain)
 729 {
 730     RECT client_rect;
 731
 732     if (wined3d_settings.offscreen_rendering_mode != ORM_FBO)
 733         return;
 734
 735     if (!swapchain->desc.backbuffer_count)
 736     {
 737         TRACE("Single buffered rendering.\n");
 738         swapchain->render_to_fbo = FALSE;
 739         return;
 740     }
 741
 742     GetClientRect(swapchain->win_handle, &client_rect);
 743
 744     TRACE("Backbuffer %ux%u, window %ux%u.\n",
 745             swapchain->desc.backbuffer_width,
 746             swapchain->desc.backbuffer_height,
 747             client_rect.right, client_rect.bottom);
 748     TRACE("Multisample type %#x, quality %#x.\n",
 749             swapchain->desc.multisample_type,
 750             swapchain->desc.multisample_quality);
 751
 752     if (!wined3d_settings.always_offscreen && !swapchain->desc.multisample_type
 753             && swapchain->desc.backbuffer_width == client_rect.right
 754             && swapchain->desc.backbuffer_height == client_rect.bottom)
 755     {
 756         TRACE("Backbuffer dimensions match window dimensions, rendering onscreen.\n");
 757         swapchain->render_to_fbo = FALSE;
 758         return;
 759     }
 760
 761     TRACE("Rendering to FBO.\n");
 762     swapchain->render_to_fbo = TRUE;
 763 }
 764
 765 static HRESULT swapchain_init(struct wined3d_swapchain *swapchain, struct wined3d_device *device,
 766         struct wined3d_swapchain_desc *desc, void *parent, const struct wined3d_parent_ops *parent_ops)
 767 {
 768     const struct wined3d_adapter *adapter = device->adapter;
 769     struct wined3d_resource_desc surface_desc;
 770     BOOL displaymode_set = FALSE;
 771     RECT client_rect;
 772     HWND window;
 773     HRESULT hr;
 774     UINT i;
 775
 776     if (desc->backbuffer_count > WINED3DPRESENT_BACK_BUFFER_MAX)
 777     {
 778         FIXME("The application requested %u back buffers, this is not supported.\n",
 779                 desc->backbuffer_count);
 780         return WINED3DERR_INVALIDCALL;
 781     }
 782
 783     if (desc->backbuffer_count > 1)
 784     {
 785         FIXME("The application requested more than one back buffer, this is not properly supported.\n"
 786                 "Please configure the application to use double buffering (1 back buffer) if possible.\n");
 787     }
 788
 789     if (device->wined3d->flags & WINED3D_NO3D)
 790         swapchain->swapchain_ops = &swapchain_gdi_ops;
 791     else
 792         swapchain->swapchain_ops = &swapchain_gl_ops;
 793
 794     window = desc->device_window ? desc->device_window : device->create_parms.focus_window;
 795
 796     swapchain->device = device;
 797     swapchain->parent = parent;
 798     swapchain->parent_ops = parent_ops;
 799     swapchain->ref = 1;
 800     swapchain->win_handle = window;
 801     swapchain->device_window = window;
 802
 803     if (FAILED(hr = wined3d_get_adapter_display_mode(device->wined3d,
 804             adapter->ordinal, &swapchain->original_mode, NULL)))
 805     {
 806         ERR("Failed to get current display mode, hr %#x.\n", hr);
 807         goto err;
 808     }
 809
 810     GetClientRect(window, &client_rect);
 811     if (desc->windowed
 812             && (!desc->backbuffer_width || !desc->backbuffer_height
 813             || desc->backbuffer_format == WINED3DFMT_UNKNOWN))
 814     {
 815
 816         if (!desc->backbuffer_width)
 817         {
 818             desc->backbuffer_width = client_rect.right;
 819             TRACE("Updating width to %u.\n", desc->backbuffer_width);
 820         }
 821
 822         if (!desc->backbuffer_height)
 823         {
 824             desc->backbuffer_height = client_rect.bottom;
 825             TRACE("Updating height to %u.\n", desc->backbuffer_height);
 826         }
 827
 828         if (desc->backbuffer_format == WINED3DFMT_UNKNOWN)
 829         {
 830             desc->backbuffer_format = swapchain->original_mode.format_id;
 831             TRACE("Updating format to %s.\n", debug_d3dformat(swapchain->original_mode.format_id));
 832         }
 833     }
 834     swapchain->desc = *desc;
 835     swapchain_update_render_to_fbo(swapchain);
 836
 837     TRACE("Creating front buffer.\n");
 838
 839     surface_desc.resource_type = WINED3D_RTYPE_SURFACE;
 840     surface_desc.format = swapchain->desc.backbuffer_format;
 841     surface_desc.multisample_type = swapchain->desc.multisample_type;
 842     surface_desc.multisample_quality = swapchain->desc.multisample_quality;
 843     surface_desc.usage = 0;
 844     surface_desc.pool = WINED3D_POOL_DEFAULT;
 845     surface_desc.width = swapchain->desc.backbuffer_width;
 846     surface_desc.height = swapchain->desc.backbuffer_height;
 847     surface_desc.depth = 1;
 848     surface_desc.size = 0;
 849
 850     if (FAILED(hr = device->device_parent->ops->create_swapchain_surface(device->device_parent,
 851             parent, &surface_desc, &swapchain->front_buffer)))
 852     {
 853         WARN("Failed to create front buffer, hr %#x.\n", hr);
 854         goto err;
 855     }
 856
 857     surface_set_swapchain(swapchain->front_buffer, swapchain);
 858     if (!(device->wined3d->flags & WINED3D_NO3D))
 859     {
 860         surface_validate_location(swapchain->front_buffer, WINED3D_LOCATION_DRAWABLE);
 861         surface_invalidate_location(swapchain->front_buffer, ~WINED3D_LOCATION_DRAWABLE);
 862     }
 863
 864     /* MSDN says we're only allowed a single fullscreen swapchain per device,
 865      * so we should really check to see if there is a fullscreen swapchain
 866      * already. Does a single head count as full screen? */
 867
 868     if (!desc->windowed)
 869     {
 870         struct wined3d_display_mode mode;
 871
 872         /* Change the display settings */
 873         mode.width = desc->backbuffer_width;
 874         mode.height = desc->backbuffer_height;
 875         mode.format_id = desc->backbuffer_format;
 876         mode.refresh_rate = desc->refresh_rate;
 877         mode.scanline_ordering = WINED3D_SCANLINE_ORDERING_UNKNOWN;
 878
 879         if (FAILED(hr = wined3d_set_adapter_display_mode(device->wined3d, adapter->ordinal, &mode)))
 880         {
 881             WARN("Failed to set display mode, hr %#x.\n", hr);
 882             goto err;
 883         }
 884         displaymode_set = TRUE;
 885     }
 886
 887     if (!(device->wined3d->flags & WINED3D_NO3D))
 888     {
 889         static const enum wined3d_format_id formats[] =
 890         {
 891             WINED3DFMT_D24_UNORM_S8_UINT,
 892             WINED3DFMT_D32_UNORM,
 893             WINED3DFMT_R24_UNORM_X8_TYPELESS,
 894             WINED3DFMT_D16_UNORM,
 895             WINED3DFMT_S1_UINT_D15_UNORM
 896         };
 897
 898         const struct wined3d_gl_info *gl_info = &adapter->gl_info;
 899
 900         swapchain->context = HeapAlloc(GetProcessHeap(), 0, sizeof(*swapchain->context));
 901         if (!swapchain->context)
 902         {
 903             ERR("Failed to create the context array.\n");
 904             hr = E_OUTOFMEMORY;
 905             goto err;
 906         }
 907         swapchain->num_contexts = 1;
 908
 909         /* In WGL both color, depth and stencil are features of a pixel format. In case of D3D they are separate.
 910          * You are able to add a depth + stencil surface at a later stage when you need it.
 911          * In order to support this properly in WineD3D we need the ability to recreate the opengl context and
 912          * drawable when this is required. This is very tricky as we need to reapply ALL opengl states for the new
 913          * context, need torecreate shaders, textures and other resources.
 914          *
 915          * The context manager already takes care of the state problem and for the other tasks code from Reset
 916          * can be used. These changes are way to risky during the 1.0 code freeze which is taking place right now.
 917          * Likely a lot of other new bugs will be exposed. For that reason request a depth stencil surface all the
 918          * time. It can cause a slight performance hit but fixes a lot of regressions. A fixme reminds of that this
 919          * issue needs to be fixed. */
 920         for (i = 0; i < (sizeof(formats) / sizeof(*formats)); i++)
 921         {
 922             swapchain->ds_format = wined3d_get_format(gl_info, formats[i]);
 923             swapchain->context[0] = context_create(swapchain, swapchain->front_buffer, swapchain->ds_format);
 924             if (swapchain->context[0]) break;
 925             TRACE("Depth stencil format %s is not supported, trying next format\n",
 926                   debug_d3dformat(formats[i]));
 927         }
 928
 929         if (!swapchain->context[0])
 930         {
 931             WARN("Failed to create context.\n");
 932             hr = WINED3DERR_NOTAVAILABLE;
 933             goto err;
 934         }
 935
 936         if (wined3d_settings.offscreen_rendering_mode != ORM_FBO
 937                 && (!desc->enable_auto_depth_stencil
 938                 || swapchain->desc.auto_depth_stencil_format != swapchain->ds_format->id))
 939         {
 940             FIXME("Add OpenGL context recreation support to context_validate_onscreen_formats\n");
 941         }
 942         context_release(swapchain->context[0]);
 943     }
 944
 945     if (swapchain->desc.backbuffer_count > 0)
 946     {
 947         swapchain->back_buffers = HeapAlloc(GetProcessHeap(), 0,
 948                 sizeof(*swapchain->back_buffers) * swapchain->desc.backbuffer_count);
 949         if (!swapchain->back_buffers)
 950         {
 951             ERR("Failed to allocate backbuffer array memory.\n");
 952             hr = E_OUTOFMEMORY;
 953             goto err;
 954         }
 955
 956         surface_desc.usage |= WINED3DUSAGE_RENDERTARGET;
 957         for (i = 0; i < swapchain->desc.backbuffer_count; ++i)
 958         {
 959             TRACE("Creating back buffer %u.\n", i);
 960             if (FAILED(hr = device->device_parent->ops->create_swapchain_surface(device->device_parent,
 961                     parent, &surface_desc, &swapchain->back_buffers[i])))
 962             {
 963                 WARN("Failed to create back buffer %u, hr %#x.\n", i, hr);
 964                 swapchain->desc.backbuffer_count = i;
 965                 goto err;
 966             }
 967             surface_set_swapchain(swapchain->back_buffers[i], swapchain);
 968         }
 969     }
 970
 971     /* Swapchains share the depth/stencil buffer, so only create a single depthstencil surface. */
 972     if (desc->enable_auto_depth_stencil && !(device->wined3d->flags & WINED3D_NO3D))
 973     {
 974         TRACE("Creating depth/stencil buffer.\n");
 975         if (!device->auto_depth_stencil)
 976         {
 977             surface_desc.format = swapchain->desc.auto_depth_stencil_format;
 978             surface_desc.usage = WINED3DUSAGE_DEPTHSTENCIL;
 979
 980             if (FAILED(hr = device->device_parent->ops->create_swapchain_surface(device->device_parent,
 981                     device->device_parent, &surface_desc, &device->auto_depth_stencil)))
 982             {
 983                 WARN("Failed to create the auto depth stencil, hr %#x.\n", hr);
 984                 goto err;
 985             }
 986         }
 987     }
 988
 989     wined3d_swapchain_get_gamma_ramp(swapchain, &swapchain->orig_gamma);
 990
 991     return WINED3D_OK;
 992
 993 err:
 994     if (displaymode_set)
 995     {
 996         if (FAILED(wined3d_set_adapter_display_mode(device->wined3d,
 997                 adapter->ordinal, &swapchain->original_mode)))
 998             ERR("Failed to restore display mode.\n");
 999         ClipCursor(NULL);
1000     }
1001
1002     if (swapchain->back_buffers)
1003     {
1004         for (i = 0; i < swapchain->desc.backbuffer_count; ++i)
1005         {
1006             if (swapchain->back_buffers[i])
1007             {
1008                 surface_set_swapchain(swapchain->back_buffers[i], NULL);
1009                 wined3d_surface_decref(swapchain->back_buffers[i]);
1010             }
1011         }
1012         HeapFree(GetProcessHeap(), 0, swapchain->back_buffers);
1013     }
1014
1015     if (swapchain->context)
1016     {
1017         if (swapchain->context[0])
1018         {
1019             context_release(swapchain->context[0]);
1020             context_destroy(device, swapchain->context[0]);
1021             swapchain->num_contexts = 0;
1022         }
1023         HeapFree(GetProcessHeap(), 0, swapchain->context);
1024     }
1025
1026     if (swapchain->front_buffer)
1027     {
1028         surface_set_swapchain(swapchain->front_buffer, NULL);
1029         wined3d_surface_decref(swapchain->front_buffer);
1030     }
1031
1032     return hr;
1033 }
1034
1035 HRESULT CDECL wined3d_swapchain_create(struct wined3d_device *device, struct wined3d_swapchain_desc *desc,
1036         void *parent, const struct wined3d_parent_ops *parent_ops, struct wined3d_swapchain **swapchain)
1037 {
1038     struct wined3d_swapchain *object;
1039     HRESULT hr;
1040
1041     TRACE("device %p, desc %p, parent %p, parent_ops %p, swapchain %p.\n",
1042             device, desc, parent, parent_ops, swapchain);
1043
1044     object = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*object));
1045     if (!object)
1046         return E_OUTOFMEMORY;
1047
1048     hr = swapchain_init(object, device, desc, parent, parent_ops);
1049     if (FAILED(hr))
1050     {
1051         WARN("Failed to initialize swapchain, hr %#x.\n", hr);
1052         HeapFree(GetProcessHeap(), 0, object);
1053         return hr;
1054     }
1055
1056     TRACE("Created swapchain %p.\n", object);
1057     *swapchain = object;
1058
1059     return WINED3D_OK;
1060 }
1061
1062 static struct wined3d_context *swapchain_create_context(struct wined3d_swapchain *swapchain)
1063 {
1064     struct wined3d_context **newArray;
1065     struct wined3d_context *ctx;
1066
1067     TRACE("Creating a new context for swapchain %p, thread %u.\n", swapchain, GetCurrentThreadId());
1068
1069     if (!(ctx = context_create(swapchain, swapchain->front_buffer, swapchain->ds_format)))
1070     {
1071         ERR("Failed to create a new context for the swapchain\n");
1072         return NULL;
1073     }
1074     context_release(ctx);
1075
1076     newArray = HeapAlloc(GetProcessHeap(), 0, sizeof(*newArray) * (swapchain->num_contexts + 1));
1077     if(!newArray) {
1078         ERR("Out of memory when trying to allocate a new context array\n");
1079         context_destroy(swapchain->device, ctx);
1080         return NULL;
1081     }
1082     memcpy(newArray, swapchain->context, sizeof(*newArray) * swapchain->num_contexts);
1083     HeapFree(GetProcessHeap(), 0, swapchain->context);
1084     newArray[swapchain->num_contexts] = ctx;
1085     swapchain->context = newArray;
1086     swapchain->num_contexts++;
1087
1088     TRACE("Returning context %p\n", ctx);
1089     return ctx;
1090 }
1091
1092 void swapchain_destroy_contexts(struct wined3d_swapchain *swapchain)
1093 {
1094     unsigned int i;
1095
1096     for (i = 0; i < swapchain->num_contexts; ++i)
1097     {
1098         context_destroy(swapchain->device, swapchain->context[i]);
1099     }
1100     swapchain->num_contexts = 0;
1101 }
1102
1103 struct wined3d_context *swapchain_get_context(struct wined3d_swapchain *swapchain)
1104 {
1105     DWORD tid = GetCurrentThreadId();
1106     unsigned int i;
1107
1108     for (i = 0; i < swapchain->num_contexts; ++i)
1109     {
1110         if (swapchain->context[i]->tid == tid)
1111             return swapchain->context[i];
1112     }
1113
1114     /* Create a new context for the thread */
1115     return swapchain_create_context(swapchain);
1116 }
1117
1118 void get_drawable_size_swapchain(const struct wined3d_context *context, UINT *width, UINT *height)
1119 {
1120     /* The drawable size of an onscreen drawable is the surface size.
1121      * (Actually: The window size, but the surface is created in window size) */
1122     *width = context->current_rt->resource.width;
1123     *height = context->current_rt->resource.height;
1124 }
1125
1126 HDC swapchain_get_backup_dc(struct wined3d_swapchain *swapchain)
1127 {
1128     if (!swapchain->backup_dc)
1129     {
1130         TRACE("Creating the backup window for swapchain %p.\n", swapchain);
1131
1132         if (!(swapchain->backup_wnd = CreateWindowA(WINED3D_OPENGL_WINDOW_CLASS_NAME, "WineD3D fake window",
1133                 WS_OVERLAPPEDWINDOW, 10, 10, 10, 10, NULL, NULL, NULL, NULL)))
1134         {
1135             ERR("Failed to create a window.\n");
1136             return NULL;
1137         }
1138
1139         if (!(swapchain->backup_dc = GetDC(swapchain->backup_wnd)))
1140         {
1141             ERR("Failed to get a DC.\n");
1142             DestroyWindow(swapchain->backup_wnd);
1143             swapchain->backup_wnd = NULL;
1144             return NULL;
1145         }
1146     }
1147
1148     return swapchain->backup_dc;
1149 }
1150
1151 void swapchain_update_draw_bindings(struct wined3d_swapchain *swapchain)
1152 {
1153     UINT i;
1154
1155     surface_update_draw_binding(swapchain->front_buffer);
1156
1157     for (i = 0; i < swapchain->desc.backbuffer_count; ++i)
1158     {
1159         surface_update_draw_binding(swapchain->back_buffers[i]);
1160     }
1161 }