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gallium: add usage parameter to pipe_buffer_create
[mesa.git] / src / gallium / state_trackers / d3d1x / dxgi / src / dxgi_native.cpp
1 /**************************************************************************
2 *
3 * Copyright 2010 Luca Barbieri
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial
15 * portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 *
25 **************************************************************************/
26
27 #include "dxgi_private.h"
28 extern "C" {
29 #include "native.h"
30 #include <util/u_format.h>
31 #include <util/u_inlines.h>
32 #include <util/u_simple_shaders.h>
33 #include <pipe/p_shader_tokens.h>
34 }
35 #include <iostream>
36 #include <memory>
37
38 struct GalliumDXGIOutput;
39 struct GalliumDXGIAdapter;
40 struct GalliumDXGISwapChain;
41 struct GalliumDXGIFactory;
42
43 static HRESULT GalliumDXGISwapChainCreate(GalliumDXGIFactory* factory, IUnknown* device, const DXGI_SWAP_CHAIN_DESC& desc, IDXGISwapChain** out_swap_chain);
44 static HRESULT GalliumDXGIAdapterCreate(GalliumDXGIFactory* adapter, const struct native_platform* platform, void* dpy, IDXGIAdapter1** out_adapter);
45 static HRESULT GalliumDXGIOutputCreate(GalliumDXGIAdapter* adapter, const std::string& name, const struct native_connector* connector, IDXGIOutput** out_output);
46 static void GalliumDXGISwapChainRevalidate(IDXGISwapChain* swap_chain);
47
48 template<typename Base = IDXGIObject, typename Parent = IDXGIObject>
49 struct GalliumDXGIObject : public GalliumPrivateDataComObject<Base>
50 {
51 ComPtr<Parent> parent;
52
53 GalliumDXGIObject(Parent* p_parent = 0)
54 {
55 this->parent = p_parent;
56 }
57
58 virtual HRESULT STDMETHODCALLTYPE GetParent(
59 REFIID riid,
60 void **out_parent)
61 {
62 return parent->QueryInterface(riid, out_parent);
63 }
64 };
65
66 COM_INTERFACE(IGalliumDXGIBackend, IUnknown)
67
68 // TODO: somehow check whether the window is fully obscured or not
69 struct GalliumDXGIIdentityBackend : public GalliumComObject<IGalliumDXGIBackend>
70 {
71 virtual HRESULT STDMETHODCALLTYPE BeginPresent(
72 HWND hwnd,
73 void** present_cookie,
74 void** window,
75 RECT *rect,
76 RGNDATA **rgndata,
77 BOOL* preserve_aspect_ratio
78 )
79 {
80 *window = (void*)hwnd;
81 rect->left = 0;
82 rect->top = 0;
83 rect->right = INT_MAX;
84 rect->bottom = INT_MAX;
85 *rgndata = 0;
86
87 // yes, because we like things looking good
88 *preserve_aspect_ratio = TRUE;
89 *present_cookie = 0;
90 return S_OK;
91 }
92
93 virtual void STDMETHODCALLTYPE EndPresent(
94 HWND hwnd,
95 void* present_cookie
96 )
97 {}
98
99 virtual HRESULT STDMETHODCALLTYPE TestPresent(HWND hwnd)
100 {
101 return S_OK;
102 }
103
104 virtual HRESULT STDMETHODCALLTYPE GetPresentSize(
105 HWND hwnd,
106 unsigned* width,
107 unsigned* height
108 )
109 {
110 *width = 0;
111 *height = 0;
112 return S_OK;
113 }
114 };
115
116 // TODO: maybe install an X11 error hook, so we can return errors properly
117 struct GalliumDXGIX11IdentityBackend : public GalliumDXGIIdentityBackend
118 {
119 Display* dpy;
120
121 GalliumDXGIX11IdentityBackend(Display* dpy)
122 : dpy(dpy)
123 {}
124
125 virtual HRESULT STDMETHODCALLTYPE GetPresentSize(
126 HWND hwnd,
127 unsigned* width,
128 unsigned* height
129 )
130 {
131 XWindowAttributes xwa;
132 XGetWindowAttributes(dpy, (Window)hwnd, &xwa);
133 *width = xwa.width;
134 *height = xwa.height;
135 return S_OK;
136 }
137 };
138
139 struct GalliumDXGIFactory : public GalliumDXGIObject<IDXGIFactory1, IUnknown>
140 {
141 HWND associated_window;
142 const struct native_platform* platform;
143 void* display;
144 ComPtr<IGalliumDXGIBackend> backend;
145 void* resolver_cookie;
146
147 GalliumDXGIFactory(const struct native_platform* platform, void* display, IGalliumDXGIBackend* p_backend)
148 : GalliumDXGIObject<IDXGIFactory1, IUnknown>((IUnknown*)NULL), platform(platform), display(display)
149 {
150 if(p_backend)
151 backend = p_backend;
152 else if(!strcmp(platform->name, "X11"))
153 backend.reset(new GalliumDXGIX11IdentityBackend((Display*)display));
154 else
155 backend.reset(new GalliumDXGIIdentityBackend());
156 }
157
158 virtual HRESULT STDMETHODCALLTYPE EnumAdapters(
159 UINT adapter,
160 IDXGIAdapter **out_adapter)
161 {
162 return EnumAdapters1(adapter, (IDXGIAdapter1**)out_adapter);
163 }
164
165 virtual HRESULT STDMETHODCALLTYPE EnumAdapters1(
166 UINT adapter,
167 IDXGIAdapter1 **out_adapter)
168 {
169 *out_adapter = 0;
170 if(adapter == 0)
171 {
172 return GalliumDXGIAdapterCreate(this, platform, display, out_adapter);
173 }
174 #if 0
175 // TODO: enable this
176 if(platform == native_get_x11_platform())
177 {
178 unsigned nscreens = ScreenCount((Display*)display);
179 if(adapter < nscreens)
180 {
181 unsigned def_screen = DefaultScreen(display);
182 if(adapter <= def_screen)
183 --adapter;
184 *out_adapter = GalliumDXGIAdapterCreate(this, platform, display, adapter);
185 return S_OK;
186 }
187 }
188 #endif
189 return DXGI_ERROR_NOT_FOUND;
190 }
191
192 /* TODO: this is a mysterious underdocumented magic API
193 * Can we have multiple windows associated?
194 * Can we have multiple windows associated if we use multiple factories?
195 * If so, what should GetWindowAssociation return?
196 * If not, does a new swapchain steal the association?
197 * Does this act for existing swapchains? For new swapchains?
198 */
199 virtual HRESULT STDMETHODCALLTYPE MakeWindowAssociation(
200 HWND window_handle,
201 UINT flags)
202 {
203 /* TODO: actually implement, for Wine, X11 and KMS*/
204 associated_window = window_handle;
205 return S_OK;
206 }
207
208 virtual HRESULT STDMETHODCALLTYPE GetWindowAssociation(
209 HWND *pwindow_handle)
210 {
211 *pwindow_handle = associated_window;
212 return S_OK;
213 }
214
215 virtual HRESULT STDMETHODCALLTYPE CreateSwapChain(
216 IUnknown *device,
217 DXGI_SWAP_CHAIN_DESC *desc,
218 IDXGISwapChain **out_swap_chain)
219 {
220 return GalliumDXGISwapChainCreate(this, device, *desc, out_swap_chain);
221 }
222
223 virtual HRESULT STDMETHODCALLTYPE CreateSoftwareAdapter(
224 HMODULE module,
225 IDXGIAdapter **out_adapter)
226 {
227 /* TODO: ignore the module, and just create a Gallium software screen */
228 *out_adapter = 0;
229 return E_NOTIMPL;
230 }
231
232 /* TODO: support hotplug */
233 virtual BOOL STDMETHODCALLTYPE IsCurrent( void)
234 {
235 return TRUE;
236 }
237 };
238
239 struct GalliumDXGIAdapter
240 : public GalliumMultiComObject<
241 GalliumDXGIObject<IDXGIAdapter1, GalliumDXGIFactory>,
242 IGalliumAdapter>
243 {
244 struct native_display* display;
245 const struct native_config** configs;
246 std::unordered_multimap<unsigned, unsigned> configs_by_pipe_format;
247 std::unordered_map<unsigned, unsigned> configs_by_native_visual_id;
248 const struct native_connector** connectors;
249 unsigned num_configs;
250 DXGI_ADAPTER_DESC1 desc;
251 std::vector<ComPtr<IDXGIOutput> > outputs;
252 int num_outputs;
253 struct native_event_handler handler;
254
255 GalliumDXGIAdapter(GalliumDXGIFactory* factory, const struct native_platform* platform, void* dpy)
256 {
257 this->parent = factory;
258
259 /* FIXME handler should be static */
260 handler.invalid_surface = handle_invalid_surface;
261 handler.new_drm_screen = dxgi_loader_create_drm_screen;
262 handler.new_sw_screen = dxgi_loader_create_sw_screen;
263 platform->set_event_handler(&handler);
264
265 display = platform->create_display(dpy, FALSE, this);
266 if(!display)
267 display = platform->create_display(dpy, TRUE, this);
268 if(!display)
269 throw E_FAIL;
270 memset(&desc, 0, sizeof(desc));
271 std::string s = std::string("GalliumD3D on ") + display->screen->get_name(display->screen) + " by " + display->screen->get_vendor(display->screen);
272
273 /* hopefully no one will decide to use UTF-8 in Gallium name/vendor strings */
274 for(int i = 0; i < std::min((int)s.size(), 127); ++i)
275 desc.Description[i] = (WCHAR)s[i];
276
277 // TODO: add an interface to get these; for now, return mid/low values
278 desc.DedicatedVideoMemory = 256 << 20;
279 desc.DedicatedSystemMemory = 256 << 20;
280 desc.SharedSystemMemory = 1024 << 20;
281
282 // TODO: we should actually use an unique ID instead
283 *(void**)&desc.AdapterLuid = dpy;
284
285 configs = display->get_configs(display, (int*)&num_configs);
286 for(unsigned i = 0; i < num_configs; ++i)
287 {
288 if(configs[i]->window_bit)
289 {
290 configs_by_pipe_format.insert(std::make_pair(configs[i]->color_format, i));
291 configs_by_native_visual_id[configs[i]->native_visual_id] = i;
292 }
293 }
294
295 connectors = 0;
296 num_outputs = 0;
297
298 if(display->modeset)
299 {
300 int num_crtcs;
301
302 connectors = display->modeset->get_connectors(display, &num_outputs, &num_crtcs);
303 if(!connectors)
304 num_outputs = 0;
305 else if(!num_outputs)
306 {
307 free(connectors);
308 connectors = 0;
309 }
310 }
311 if(!num_outputs)
312 num_outputs = 1;
313 }
314
315 static void handle_invalid_surface(struct native_display *ndpy, struct native_surface *nsurf, unsigned int seq_num)
316 {
317 GalliumDXGISwapChainRevalidate((IDXGISwapChain*)nsurf->user_data);
318 }
319
320 ~GalliumDXGIAdapter()
321 {
322 display->destroy(display);
323 free(configs);
324 free(connectors);
325 }
326
327 virtual HRESULT STDMETHODCALLTYPE EnumOutputs(
328 UINT output,
329 IDXGIOutput **out_output)
330 {
331 if(output >= (unsigned)num_outputs)
332 return DXGI_ERROR_NOT_FOUND;
333
334 if(connectors)
335 {
336 std::ostringstream ss;
337 ss << "output #" << output;
338 return GalliumDXGIOutputCreate(this, ss.str(), connectors[output], out_output);
339 }
340 else
341 return GalliumDXGIOutputCreate(this, "Unique output", NULL, out_output);
342 }
343
344 virtual HRESULT STDMETHODCALLTYPE GetDesc(
345 DXGI_ADAPTER_DESC *desc)
346 {
347 memcpy(desc, &desc, sizeof(*desc));
348 return S_OK;
349 }
350
351 virtual HRESULT STDMETHODCALLTYPE GetDesc1(
352 DXGI_ADAPTER_DESC1 *desc)
353 {
354 memcpy(desc, &desc, sizeof(*desc));
355 return S_OK;
356 }
357
358 virtual HRESULT STDMETHODCALLTYPE CheckInterfaceSupport(
359 REFGUID interface_name,
360 LARGE_INTEGER *u_m_d_version)
361 {
362 // these number was taken from Windows 7 with Catalyst 10.8: its meaning is unclear
363 if(interface_name == IID_ID3D11Device || interface_name == IID_ID3D10Device1 || interface_name == IID_ID3D10Device)
364 {
365 u_m_d_version->QuadPart = 0x00080011000a0411ULL;
366 return S_OK;
367 }
368 return DXGI_ERROR_UNSUPPORTED;
369 }
370
371 pipe_screen* STDMETHODCALLTYPE GetGalliumScreen()
372 {
373 return display->screen;
374 }
375
376 pipe_screen* STDMETHODCALLTYPE GetGalliumReferenceSoftwareScreen()
377 {
378 // TODO: give a softpipe screen
379 return display->screen;
380 }
381
382 pipe_screen* STDMETHODCALLTYPE GetGalliumFastSoftwareScreen()
383 {
384 // TODO: give an llvmpipe screen
385 return display->screen;
386 }
387 };
388
389
390 struct GalliumDXGIOutput : public GalliumDXGIObject<IDXGIOutput, GalliumDXGIAdapter>
391 {
392 DXGI_OUTPUT_DESC desc;
393 const struct native_mode** modes;
394 DXGI_MODE_DESC* dxgi_modes;
395 unsigned num_modes;
396 const struct native_connector* connector;
397 DXGI_GAMMA_CONTROL* gamma;
398
399 GalliumDXGIOutput(GalliumDXGIAdapter* adapter, std::string name, const struct native_connector* connector = 0)
400 : GalliumDXGIObject<IDXGIOutput, GalliumDXGIAdapter>(adapter), connector(connector)
401 {
402 memset(&desc, 0, sizeof(desc));
403 for(unsigned i = 0; i < std::min(name.size(), sizeof(desc.DeviceName) - 1); ++i)
404 desc.DeviceName[i] = name[i];
405 desc.AttachedToDesktop = TRUE;
406 /* TODO: should put an HMONITOR in desc.Monitor */
407
408 gamma = 0;
409 num_modes = 0;
410 modes = 0;
411 if(connector)
412 {
413 modes = parent->display->modeset->get_modes(parent->display, connector, (int*)&num_modes);
414 if(modes && num_modes)
415 {
416 dxgi_modes = new DXGI_MODE_DESC[num_modes];
417 for(unsigned i = 0; i < num_modes; ++i)
418 {
419 dxgi_modes[i].Width = modes[i]->width;
420 dxgi_modes[i].Height = modes[i]->height;
421 dxgi_modes[i].RefreshRate.Numerator = modes[i]->refresh_rate;
422 dxgi_modes[i].RefreshRate.Denominator = 1;
423 dxgi_modes[i].Scaling = DXGI_MODE_SCALING_UNSPECIFIED;
424 dxgi_modes[i].ScanlineOrdering = DXGI_MODE_SCANLINE_ORDER_UNSPECIFIED;
425 }
426 }
427 else
428 {
429 if(modes)
430 {
431 free(modes);
432 modes = 0;
433 }
434 goto use_fake_mode;
435 }
436 }
437 else
438 {
439 use_fake_mode:
440 dxgi_modes = new DXGI_MODE_DESC[1];
441 dxgi_modes[0].Width = 1920;
442 dxgi_modes[0].Height = 1200;
443 dxgi_modes[0].RefreshRate.Numerator = 60;
444 dxgi_modes[0].RefreshRate.Denominator = 1;
445 dxgi_modes[0].Scaling = DXGI_MODE_SCALING_UNSPECIFIED;
446 dxgi_modes[0].ScanlineOrdering = DXGI_MODE_SCANLINE_ORDER_UNSPECIFIED;
447 }
448 }
449
450 ~GalliumDXGIOutput()
451 {
452 delete [] dxgi_modes;
453 free(modes);
454 if(gamma)
455 delete gamma;
456 }
457
458 virtual HRESULT STDMETHODCALLTYPE GetDesc(
459 DXGI_OUTPUT_DESC *out_desc)
460 {
461 *out_desc = desc;
462 return S_OK;
463 }
464
465 virtual HRESULT STDMETHODCALLTYPE GetDisplayModeList(
466 DXGI_FORMAT enum_format,
467 UINT flags,
468 UINT *pcount,
469 DXGI_MODE_DESC *desc)
470 {
471 /* TODO: should we return DXGI_ERROR_NOT_CURRENTLY_AVAILABLE when we don't
472 * support modesetting instead of fake modes?
473 */
474 pipe_format format = dxgi_to_pipe_format[enum_format];
475 if(parent->configs_by_pipe_format.count(format))
476 {
477 if(!desc)
478 {
479 *pcount = num_modes;
480 return S_OK;
481 }
482
483 unsigned copy_modes = std::min(num_modes, *pcount);
484 for(unsigned i = 0; i < copy_modes; ++i)
485 {
486 desc[i] = dxgi_modes[i];
487 desc[i].Format = enum_format;
488 }
489 *pcount = num_modes;
490
491 if(copy_modes < num_modes)
492 return DXGI_ERROR_MORE_DATA;
493 else
494 return S_OK;
495 }
496 else
497 {
498 *pcount = 0;
499 return S_OK;
500 }
501 }
502
503 virtual HRESULT STDMETHODCALLTYPE FindClosestMatchingMode(
504 const DXGI_MODE_DESC *pModeToMatch,
505 DXGI_MODE_DESC *closest_match,
506 IUnknown *concerned_device)
507 {
508 /* TODO: actually implement this */
509 DXGI_FORMAT dxgi_format = pModeToMatch->Format;
510 enum pipe_format format = dxgi_to_pipe_format[dxgi_format];
511 init_pipe_to_dxgi_format();
512 if(!parent->configs_by_pipe_format.count(format))
513 {
514 if(!concerned_device)
515 return E_FAIL;
516 else
517 {
518 format = parent->configs[0]->color_format;
519 dxgi_format = pipe_to_dxgi_format[format];
520 }
521 }
522
523 *closest_match = dxgi_modes[0];
524 closest_match->Format = dxgi_format;
525 return S_OK;
526 }
527
528 virtual HRESULT STDMETHODCALLTYPE WaitForVBlank( void)
529 {
530 return S_OK;
531 }
532
533 virtual HRESULT STDMETHODCALLTYPE TakeOwnership(
534 IUnknown *device,
535 BOOL exclusive)
536 {
537 return S_OK;
538 }
539
540 virtual void STDMETHODCALLTYPE ReleaseOwnership( void)
541 {
542 }
543
544 virtual HRESULT STDMETHODCALLTYPE GetGammaControlCapabilities(
545 DXGI_GAMMA_CONTROL_CAPABILITIES *gamma_caps)
546 {
547 memset(gamma_caps, 0, sizeof(*gamma_caps));
548 return S_OK;
549 }
550
551 virtual HRESULT STDMETHODCALLTYPE SetGammaControl(
552 const DXGI_GAMMA_CONTROL *pArray)
553 {
554 if(!gamma)
555 gamma = new DXGI_GAMMA_CONTROL;
556 *gamma = *pArray;
557 return S_OK;
558 }
559
560 virtual HRESULT STDMETHODCALLTYPE GetGammaControl(
561 DXGI_GAMMA_CONTROL *pArray)
562 {
563 if(gamma)
564 *pArray = *gamma;
565 else
566 {
567 pArray->Scale.Red = 1;
568 pArray->Scale.Green = 1;
569 pArray->Scale.Blue = 1;
570 pArray->Offset.Red = 0;
571 pArray->Offset.Green = 0;
572 pArray->Offset.Blue = 0;
573 for(unsigned i = 0; i <= 1024; ++i)
574 pArray->GammaCurve[i].Red = pArray->GammaCurve[i].Green = pArray->GammaCurve[i].Blue = (float)i / 1024.0;
575 }
576 return S_OK;
577 }
578
579 virtual HRESULT STDMETHODCALLTYPE SetDisplaySurface(
580 IDXGISurface *scanout_surface)
581 {
582 return E_NOTIMPL;
583 }
584
585 virtual HRESULT STDMETHODCALLTYPE GetDisplaySurfaceData(
586 IDXGISurface *destination)
587 {
588 return E_NOTIMPL;
589 }
590
591 virtual HRESULT STDMETHODCALLTYPE GetFrameStatistics(
592 DXGI_FRAME_STATISTICS *stats)
593 {
594 memset(stats, 0, sizeof(*stats));
595 #ifdef _WIN32
596 QueryPerformanceCounter(&stats->SyncQPCTime);
597 #endif
598 return E_NOTIMPL;
599 }
600 };
601
602 /* Swap chain are rather complex, and Microsoft's documentation is rather
603 * lacking. As far as I know, this is the most thorough publicly available
604 * description of how swap chains work, based on multiple sources and
605 * experimentation.
606 *
607 * There are two modes (called "swap effects") that a swap chain can operate in:
608 * discard and sequential.
609 *
610 * In discard mode, things always look as if there is a single buffer, which
611 * you can get with GetBuffers(0).
612 * The 2D texture returned by GetBuffers(0) and can only be
613 * used as a render target view and for resource copies, since no CPU access
614 * flags are set and only the D3D11_BIND_RENDER_TARGET bind flag is set.
615 * On Present, it is copied to the actual display
616 * surface and the contents become undefined.
617 * D3D may internally use multiple buffers, but you can't observe this, except
618 * by looking at the buffer contents after Present (but those are undefined).
619 * If it uses multiple buffers internally, then it will normally use buffer_count buffers
620 * (this has latency implications).
621 * Discard mode seems to internally use a single buffer in windowed mode,
622 * even if DWM is enabled, and buffer_count buffers in fullscreen mode.
623 *
624 * In sequential mode, the runtime alllocates buffer_count buffers.
625 * You can get each with GetBuffers(n).
626 * GetBuffers(0) ALWAYS points to the backbuffer to be presented and has the
627 * same usage constraints as the discard mode.
628 * GetBuffer(n) with n > 0 points to resources that are identical to buffer 0, but
629 * are classified as "read-only resources" (due to DXGI_USAGE_READ_ONLY),
630 * meaning that you can't create render target views on them, or use them as
631 * a CopyResource/CopySubresourceRegion destination.
632 * It appears the only valid operation is to use them as a source for CopyResource
633 * and CopySubresourceRegion as well as just waiting for them to become
634 * buffer 0 again.
635 * Buffer n - 1 is always displayed on screen.
636 * When you call Present(), the contents of the buffers are rotated, so that buffer 0
637 * goes to buffer n - 1, and is thus displayed, and buffer 1 goes to buffer 0, becomes
638 * the accessible back buffer.
639 * The resources themselves are NOT rotated, so that you can still render on the
640 * same ID3D11Texture2D*, and views based on it, that you got before Present().
641 *
642 * Present seems to happen by either copying the relevant buffer into the window,
643 * or alternatively making it the current one, either by programming the CRTC or
644 * by sending the resource name to the DWM compositor.
645 *
646 * Hence, you can call GetBuffer(0) once and keep using the same ID3D11Texture2D*
647 * and ID3D11RenderTargetView* (and other views if needed) you got from it.
648 *
649 * If the window gets resized, DXGI will then "emulate" all successive presentations,
650 * by using a stretched blit automatically.
651 * Thus, you should handle WM_SIZE and call ResizeBuffers to update the DXGI
652 * swapchain buffers size to the new window size.
653 * Doing so requires you to release all GetBuffers() results and anything referencing
654 * them, including views and Direct3D11 deferred context command lists (this is
655 * documented).
656 *
657 * How does Microsoft implement the rotation behavior?
658 * It turns out that it does it by calling RotateResourceIdentitiesDXGI in the user-mode
659 * DDI driver.
660 * This will rotate the kernel buffer handle, or possibly rotate the GPU virtual memory
661 * mappings.
662 *
663 * The reason this is done by driver instead of by the runtime appears to be that
664 * this is necessary to support driver-provided command list support, since otherwise
665 * the command list would not always target the current backbuffer, since it would
666 * be done at the driver level, while only the runtime knows about the rotation.
667 *
668 * OK, so how do we implement this in Gallium?
669 *
670 * There are three strategies:
671 * 1. Use a single buffer, and always copy it to a window system provided buffer, or
672 * just give the buffer to the window system if it supports that
673 * 2. Rotate the buffers in the D3D1x implementation, and recreate and rebind the views.
674 * Don't support driver-provided command lists
675 * 3. Add this rotation functionality to the Gallium driver, with the idea that it would rotate
676 * remap GPU virtual memory, so that virtual address are unchanged, but the physical
677 * ones are rotated (so that pushbuffers remain valid).
678 * If the driver does not support this, either fall back to (1), or have a layer doing this,
679 * putting a deferred context layer over this intermediate layer.
680 *
681 * (2) is not acceptable since it prevents an optimal implementation.
682 * (3) is the ideal solution, but it is complicated.
683 *
684 * Hence, we implement (1) for now, and will switch to (3) later.
685 *
686 * Note that (1) doesn't really work for DXGI_SWAP_EFFECT_SEQUENTIAL with more
687 * than one buffer, so we just pretend we got asked for a single buffer in that case
688 * Fortunately, no one seems to rely on that, so we'll just not implement it at first, and
689 * later perform the rotation with blits.
690 * Once we switch to (3), we'll just use real rotation to do it..
691 *
692 * DXGI_SWAP_EFFECT_SEQUENTIAL with more than one buffer is of dubious use
693 * anyway, since you can only render or write to buffer 0, and other buffers can apparently
694 * be used only as sources for copies.
695 * I was unable to find any code using it either in DirectX SDK examples, or on the web.
696 *
697 * It seems the only reason you would use it is to not have to redraw from scratch, while
698 * also possibly avoid a copy compared to buffer_count == 1, assuming that your
699 * application is OK with having to redraw starting not from the last frame, but from
700 * one/two/more frames behind it.
701 *
702 * A better design would forbid the user specifying buffer_count explicitly, and
703 * would instead let the application give an upper bound on how old the buffer can
704 * become after presentation, with "infinite" being equivalent to discard.
705 * The runtime would then tell the application with frame number the buffer switched to
706 * after present.
707 * In addition, in a better design, the application would be allowed to specify the
708 * number of buffers available, having all them usable for rendering, so that things
709 * like video players could efficiently decode frames in parallel.
710 * Present would in such a better design gain a way to specify the number of buffers
711 * to present.
712 *
713 * Other miscellaneous info:
714 * DXGI_PRESENT_DO_NOT_SEQUENCE causes DXGI to hold the frame for another
715 * vblank interval without rotating the resource data.
716 *
717 * References:
718 * "DXGI Overview" in MSDN
719 * IDXGISwapChain documentation on MSDN
720 * "RotateResourceIdentitiesDXGI" on MSDN
721 * http://forums.xna.com/forums/p/42362/266016.aspx
722 */
723
724 static float quad_data[] = {
725 -1, -1, 0, 0,
726 -1, 1, 0, 1,
727 1, 1, 1, 1,
728 1, -1, 1, 0,
729 };
730
731 struct dxgi_blitter
732 {
733 pipe_context* pipe;
734 bool normalized;
735 void* fs;
736 void* vs;
737 void* sampler[2];
738 void* elements;
739 void* blend;
740 void* rasterizer;
741 void* zsa;
742 struct pipe_clip_state clip;
743 struct pipe_vertex_buffer vbuf;
744 struct pipe_draw_info draw;
745
746 dxgi_blitter(pipe_context* pipe)
747 : pipe(pipe)
748 {
749 //normalized = !!pipe->screen->get_param(pipe, PIPE_CAP_NPOT_TEXTURES);
750 // TODO: need to update buffer in unnormalized case
751 normalized = true;
752
753 struct pipe_rasterizer_state rs_state;
754 memset(&rs_state, 0, sizeof(rs_state));
755 rs_state.cull_face = PIPE_FACE_NONE;
756 rs_state.gl_rasterization_rules = 1;
757 rs_state.flatshade = 1;
758 rasterizer = pipe->create_rasterizer_state(pipe, &rs_state);
759
760 struct pipe_blend_state blendd;
761 memset(&blendd, 0, sizeof(blendd));
762 blendd.rt[0].colormask = PIPE_MASK_RGBA;
763 blend = pipe->create_blend_state(pipe, &blendd);
764
765 struct pipe_depth_stencil_alpha_state zsad;
766 memset(&zsad, 0, sizeof(zsad));
767 zsa = pipe->create_depth_stencil_alpha_state(pipe, &zsad);
768
769 struct pipe_vertex_element velem[2];
770 memset(&velem[0], 0, sizeof(velem[0]) * 2);
771 velem[0].src_offset = 0;
772 velem[0].src_format = PIPE_FORMAT_R32G32_FLOAT;
773 velem[1].src_offset = 8;
774 velem[1].src_format = PIPE_FORMAT_R32G32_FLOAT;
775 elements = pipe->create_vertex_elements_state(pipe, 2, &velem[0]);
776
777 for(unsigned stretch = 0; stretch < 2; ++stretch)
778 {
779 struct pipe_sampler_state sampler_state;
780 memset(&sampler_state, 0, sizeof(sampler_state));
781 sampler_state.min_img_filter = stretch ? PIPE_TEX_FILTER_LINEAR : PIPE_TEX_FILTER_NEAREST;
782 sampler_state.mag_img_filter = stretch ? PIPE_TEX_FILTER_LINEAR : PIPE_TEX_FILTER_NEAREST;
783 sampler_state.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
784 sampler_state.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
785 sampler_state.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
786 sampler_state.normalized_coords = normalized;
787
788 sampler[stretch] = pipe->create_sampler_state(pipe, &sampler_state);
789 }
790
791 fs = util_make_fragment_tex_shader(pipe, normalized ? TGSI_TEXTURE_2D : TGSI_TEXTURE_RECT, TGSI_INTERPOLATE_LINEAR);
792
793 const unsigned semantic_names[] = { TGSI_SEMANTIC_POSITION, TGSI_SEMANTIC_GENERIC };
794 const unsigned semantic_indices[] = { 0, 0 };
795 vs = util_make_vertex_passthrough_shader(pipe, 2, semantic_names, semantic_indices);
796
797 vbuf.buffer = pipe_buffer_create(pipe->screen, PIPE_BIND_VERTEX_BUFFER,
798 PIPE_USAGE_STREAM, sizeof(quad_data));
799 vbuf.buffer_offset = 0;
800 vbuf.stride = 4 * sizeof(float);
801 pipe_buffer_write(pipe, vbuf.buffer, 0, sizeof(quad_data), quad_data);
802
803 memset(&clip, 0, sizeof(clip));
804
805 memset(&draw, 0, sizeof(draw));
806 draw.mode = PIPE_PRIM_QUADS;
807 draw.count = 4;
808 draw.instance_count = 1;
809 draw.max_index = ~0;
810 }
811
812 void blit(struct pipe_surface* surf, struct pipe_sampler_view* view, unsigned x, unsigned y, unsigned w, unsigned h)
813 {
814 struct pipe_framebuffer_state fb;
815 memset(&fb, 0, sizeof(fb));
816 fb.nr_cbufs = 1;
817 fb.cbufs[0] = surf;
818 fb.width = surf->width;
819 fb.height = surf->height;
820
821 struct pipe_viewport_state viewport;
822 float half_width = w * 0.5f;
823 float half_height = h * 0.5f;
824 viewport.scale[0] = half_width;
825 viewport.scale[1] = half_height;
826 viewport.scale[2] = 1.0f;
827 viewport.scale[3] = 1.0f;
828 viewport.translate[0] = x + half_width;
829 viewport.translate[1] = y + half_height;
830 viewport.translate[2] = 0.0f;
831 viewport.translate[3] = 1.0f;
832
833 bool stretch = view->texture->width0 != w || view->texture->height0 != h;
834 if(pipe->render_condition)
835 pipe->render_condition(pipe, 0, 0);
836 pipe->set_framebuffer_state(pipe, &fb);
837 pipe->bind_fragment_sampler_states(pipe, 1, &sampler[stretch]);
838 pipe->set_viewport_state(pipe, &viewport);
839 pipe->set_clip_state(pipe, &clip);
840 pipe->bind_rasterizer_state(pipe, rasterizer);
841 pipe->bind_depth_stencil_alpha_state(pipe, zsa);
842 pipe->bind_blend_state(pipe, blend);
843 pipe->bind_vertex_elements_state(pipe, elements);
844 pipe->set_vertex_buffers(pipe, 1, &vbuf);
845 pipe->bind_fs_state(pipe, fs);
846 pipe->bind_vs_state(pipe, vs);
847 if(pipe->bind_gs_state)
848 pipe->bind_gs_state(pipe, 0);
849 if(pipe->bind_stream_output_state)
850 pipe->bind_stream_output_state(pipe, 0);
851 pipe->set_fragment_sampler_views(pipe, 1, &view);
852
853 pipe->draw_vbo(pipe, &draw);
854 }
855
856 ~dxgi_blitter()
857 {
858 pipe->delete_blend_state(pipe, blend);
859 pipe->delete_rasterizer_state(pipe, rasterizer);
860 pipe->delete_depth_stencil_alpha_state(pipe, zsa);
861 pipe->delete_sampler_state(pipe, sampler[0]);
862 pipe->delete_sampler_state(pipe, sampler[1]);
863 pipe->delete_vertex_elements_state(pipe, elements);
864 pipe->delete_vs_state(pipe, vs);
865 pipe->delete_fs_state(pipe, fs);
866 pipe->screen->resource_destroy(pipe->screen, vbuf.buffer);
867 }
868 };
869
870 struct GalliumDXGISwapChain : public GalliumDXGIObject<IDXGISwapChain, GalliumDXGIFactory>
871 {
872 ComPtr<IDXGIDevice>dxgi_device;
873 ComPtr<IGalliumDevice>gallium_device;
874 ComPtr<GalliumDXGIAdapter> adapter;
875 ComPtr<IDXGIOutput> target;
876
877 DXGI_SWAP_CHAIN_DESC desc;
878
879 struct native_surface* surface;
880 const struct native_config* config;
881
882 void* window;
883 struct pipe_resource* resources[NUM_NATIVE_ATTACHMENTS];
884 int width;
885 int height;
886 unsigned seq_num;
887 bool ever_validated;
888 bool needs_validation;
889 unsigned present_count;
890
891 ComPtr<IDXGISurface> buffer0;
892 struct pipe_resource* gallium_buffer0;
893 struct pipe_sampler_view* gallium_buffer0_view;
894
895 struct pipe_context* pipe;
896 bool owns_pipe;
897
898 BOOL fullscreen;
899
900 std::auto_ptr<dxgi_blitter> blitter;
901 bool formats_compatible;
902
903 GalliumDXGISwapChain(GalliumDXGIFactory* factory, IUnknown* p_device, const DXGI_SWAP_CHAIN_DESC& p_desc)
904 : GalliumDXGIObject<IDXGISwapChain, GalliumDXGIFactory>(factory), desc(p_desc), surface(0)
905 {
906 HRESULT hr;
907
908 hr = p_device->QueryInterface(IID_IGalliumDevice, (void**)&gallium_device);
909 if(!SUCCEEDED(hr))
910 throw hr;
911
912 hr = p_device->QueryInterface(IID_IDXGIDevice, (void**)&dxgi_device);
913 if(!SUCCEEDED(hr))
914 throw hr;
915
916 hr = dxgi_device->GetAdapter((IDXGIAdapter**)&adapter);
917 if(!SUCCEEDED(hr))
918 throw hr;
919
920 memset(resources, 0, sizeof(resources));
921
922 if(desc.SwapEffect == DXGI_SWAP_EFFECT_SEQUENTIAL && desc.BufferCount != 1)
923 {
924 std::cerr << "Gallium DXGI: if DXGI_SWAP_EFFECT_SEQUENTIAL is specified, only buffer_count == 1 is implemented, but " << desc.BufferCount << " was specified: ignoring this" << std::endl;
925 // change the returned desc, so that the application might perhaps notice what we did and react well
926 desc.BufferCount = 1;
927 }
928
929 pipe = gallium_device->GetGalliumContext();
930 owns_pipe = false;
931 if(!pipe)
932 {
933 pipe = adapter->display->screen->context_create(adapter->display->screen, 0);
934 owns_pipe = true;
935 }
936
937 blitter.reset(new dxgi_blitter(pipe));
938 window = 0;
939
940 hr = resolve_zero_width_height(true);
941 if(!SUCCEEDED(hr))
942 throw hr;
943 }
944
945 void init_for_window()
946 {
947 if(surface)
948 {
949 surface->destroy(surface);
950 surface = 0;
951 }
952
953 unsigned config_num;
954 if(!strcmp(parent->platform->name, "X11"))
955 {
956 XWindowAttributes xwa;
957 XGetWindowAttributes((Display*)parent->display, (Window)window, &xwa);
958 assert(adapter->configs_by_native_visual_id.count(xwa.visual->visualid));
959 config_num = adapter->configs_by_native_visual_id[xwa.visual->visualid];
960 }
961 else
962 {
963 enum pipe_format format = dxgi_to_pipe_format[desc.BufferDesc.Format];
964 if(!adapter->configs_by_pipe_format.count(format))
965 {
966 if(adapter->configs_by_pipe_format.empty())
967 throw E_FAIL;
968 // TODO: choose the best match
969 format = (pipe_format)adapter->configs_by_pipe_format.begin()->first;
970 }
971 // TODO: choose the best config
972 config_num = adapter->configs_by_pipe_format.find(format)->second;
973 }
974
975 config = adapter->configs[config_num];
976 surface = adapter->display->create_window_surface(adapter->display, (EGLNativeWindowType)window, config);
977 surface->user_data = this;
978
979 width = 0;
980 height = 0;
981 seq_num = 0;
982 present_count = 0;
983 needs_validation = true;
984 ever_validated = false;
985
986 formats_compatible = util_is_format_compatible(
987 util_format_description(dxgi_to_pipe_format[desc.BufferDesc.Format]),
988 util_format_description(config->color_format));
989 }
990
991 ~GalliumDXGISwapChain()
992 {
993 if(owns_pipe)
994 pipe->destroy(pipe);
995 }
996
997 virtual HRESULT STDMETHODCALLTYPE GetDevice(
998 REFIID riid,
999 void **pdevice)
1000 {
1001 return dxgi_device->QueryInterface(riid, pdevice);
1002 }
1003
1004 HRESULT create_buffer0()
1005 {
1006 HRESULT hr;
1007 ComPtr<IDXGISurface> new_buffer0;
1008 DXGI_USAGE usage = DXGI_USAGE_BACK_BUFFER | DXGI_USAGE_RENDER_TARGET_OUTPUT;
1009 if(desc.SwapEffect == DXGI_SWAP_EFFECT_DISCARD)
1010 usage |= DXGI_USAGE_DISCARD_ON_PRESENT;
1011 // for our blitter
1012 usage |= DXGI_USAGE_SHADER_INPUT;
1013
1014 DXGI_SURFACE_DESC surface_desc;
1015 surface_desc.Format = desc.BufferDesc.Format;
1016 surface_desc.Width = desc.BufferDesc.Width;
1017 surface_desc.Height = desc.BufferDesc.Height;
1018 surface_desc.SampleDesc = desc.SampleDesc;
1019 hr = dxgi_device->CreateSurface(&surface_desc, 1, usage, 0, &new_buffer0);
1020 if(!SUCCEEDED(hr))
1021 return hr;
1022
1023 ComPtr<IGalliumResource> gallium_resource;
1024 hr = new_buffer0->QueryInterface(IID_IGalliumResource, (void**)&gallium_resource);
1025 if(!SUCCEEDED(hr))
1026 return hr;
1027
1028 struct pipe_resource* new_gallium_buffer0 = gallium_resource->GetGalliumResource();
1029 if(!new_gallium_buffer0)
1030 return E_FAIL;
1031
1032 buffer0.reset(new_buffer0.steal());
1033 gallium_buffer0 = new_gallium_buffer0;
1034 struct pipe_sampler_view templat;
1035 memset(&templat, 0, sizeof(templat));
1036 templat.texture = gallium_buffer0;
1037 templat.swizzle_r = 0;
1038 templat.swizzle_g = 1;
1039 templat.swizzle_b = 2;
1040 templat.swizzle_a = 3;
1041 templat.format = gallium_buffer0->format;
1042 gallium_buffer0_view = pipe->create_sampler_view(pipe, gallium_buffer0, &templat);
1043 return S_OK;
1044 }
1045
1046 bool validate()
1047 {
1048 unsigned new_seq_num;
1049 needs_validation = false;
1050
1051 if(!surface->validate(surface, (1 << NATIVE_ATTACHMENT_BACK_LEFT) | (1 << NATIVE_ATTACHMENT_FRONT_LEFT), &new_seq_num, resources, &width, &height))
1052 return false;
1053
1054 if(!ever_validated || seq_num != new_seq_num)
1055 {
1056 seq_num = new_seq_num;
1057 ever_validated = true;
1058 }
1059 return true;
1060 }
1061
1062 HRESULT resolve_zero_width_height(bool force = false)
1063 {
1064 if(!force && desc.BufferDesc.Width && desc.BufferDesc.Height)
1065 return S_OK;
1066
1067 unsigned width, height;
1068 HRESULT hr = parent->backend->GetPresentSize(desc.OutputWindow, &width, &height);
1069 if(!SUCCEEDED(hr))
1070 return hr;
1071
1072 // On Windows, 8 is used, and a debug message saying so gets printed
1073 if(!width)
1074 width = 8;
1075 if(!height)
1076 height = 8;
1077
1078 if(!desc.BufferDesc.Width)
1079 desc.BufferDesc.Width = width;
1080 if(!desc.BufferDesc.Height)
1081 desc.BufferDesc.Height = height;
1082 return S_OK;
1083 }
1084
1085 virtual HRESULT STDMETHODCALLTYPE Present(
1086 UINT sync_interval,
1087 UINT flags)
1088 {
1089 HRESULT hr;
1090 if(flags & DXGI_PRESENT_TEST)
1091 return parent->backend->TestPresent(desc.OutputWindow);
1092
1093 if(!buffer0)
1094 {
1095 HRESULT hr = create_buffer0();
1096 if(!SUCCEEDED(hr))
1097 return hr;
1098 }
1099
1100 void* cur_window = 0;
1101 RECT rect;
1102 RGNDATA* rgndata;
1103 BOOL preserve_aspect_ratio;
1104 unsigned dst_w, dst_h;
1105 bool db;
1106 struct pipe_resource* dst;
1107 struct pipe_resource* src;
1108 struct pipe_surface* dst_surface;
1109 enum native_attachment att;
1110
1111 void* present_cookie;
1112 hr = parent->backend->BeginPresent(desc.OutputWindow, &present_cookie, &cur_window, &rect, &rgndata, &preserve_aspect_ratio);
1113 if(hr != S_OK)
1114 return hr;
1115
1116 if(!cur_window || rect.left >= rect.right || rect.top >= rect.bottom)
1117 goto end_present;
1118
1119 if(cur_window != window)
1120 {
1121 window = cur_window;
1122 init_for_window();
1123 }
1124
1125 if(needs_validation)
1126 {
1127 if(!validate())
1128 return DXGI_ERROR_DEVICE_REMOVED;
1129 }
1130
1131 db = !!(config->buffer_mask & (1 << NATIVE_ATTACHMENT_BACK_LEFT));
1132 dst = resources[db ? NATIVE_ATTACHMENT_BACK_LEFT : NATIVE_ATTACHMENT_FRONT_LEFT];
1133 src = gallium_buffer0;
1134 dst_surface = 0;
1135
1136 assert(src);
1137 assert(dst);
1138
1139 /* TODO: sharing the context for blitting won't work correctly if queries are active
1140 * Hopefully no one is crazy enough to keep queries active while presenting, expecting
1141 * sensible results.
1142 * We could alternatively force using another context, but that might cause inefficiency issues
1143 */
1144
1145 if((unsigned)rect.right > dst->width0)
1146 rect.right = dst->width0;
1147 if((unsigned)rect.bottom > dst->height0)
1148 rect.bottom = dst->height0;
1149 if(rect.left > rect.right)
1150 rect.left = rect.right;
1151 if(rect.top > rect.bottom)
1152 rect.top = rect.bottom;
1153
1154 if(rect.left >= rect.right && rect.top >= rect.bottom)
1155 goto end_present;
1156
1157 dst_w = rect.right - rect.left;
1158 dst_h = rect.bottom - rect.top;
1159
1160 // TODO: add support for rgndata
1161 // if(preserve_aspect_ratio || !rgndata)
1162 if(1)
1163 {
1164 unsigned blit_x, blit_y, blit_w, blit_h;
1165 float black[4] = {0, 0, 0, 0};
1166
1167 if(!formats_compatible || src->width0 != dst_w || src->height0 != dst_h) {
1168 struct pipe_surface templat;
1169 templat.usage = PIPE_BIND_RENDER_TARGET;
1170 templat.format = dst->format;
1171 templat.u.tex.level = 0;
1172 templat.u.tex.first_layer = 0;
1173 templat.u.tex.last_layer = 0;
1174 dst_surface = pipe->create_surface(pipe, dst, &templat);
1175 }
1176
1177 if(preserve_aspect_ratio)
1178 {
1179 int delta = src->width0 * dst_h - dst_w * src->height0;
1180 if(delta > 0)
1181 {
1182 blit_w = dst_w;
1183 blit_h = dst_w * src->height0 / src->width0;
1184 }
1185 else if(delta < 0)
1186 {
1187 blit_w = dst_h * src->width0 / src->height0;
1188 blit_h = dst_h;
1189 }
1190 else
1191 {
1192 blit_w = dst_w;
1193 blit_h = dst_h;
1194 }
1195
1196 blit_x = (dst_w - blit_w) >> 1;
1197 blit_y = (dst_h - blit_h) >> 1;
1198 }
1199 else
1200 {
1201 blit_x = 0;
1202 blit_y = 0;
1203 blit_w = dst_w;
1204 blit_h = dst_h;
1205 }
1206
1207 if(blit_x)
1208 pipe->clear_render_target(pipe, dst_surface, black, rect.left, rect.top, blit_x, dst_h);
1209 if(blit_y)
1210 pipe->clear_render_target(pipe, dst_surface, black, rect.left, rect.top, dst_w, blit_y);
1211
1212 if(formats_compatible && blit_w == src->width0 && blit_h == src->height0)
1213 {
1214 pipe_box box;
1215 box.x = box.y = box.z;
1216 box.width = blit_w;
1217 box.height = blit_h;
1218 box.z = 1;
1219 pipe->resource_copy_region(pipe, dst, 0, rect.left, rect.top, 0, src, 0, &box);
1220 }
1221 else
1222 {
1223 blitter->blit(dst_surface, gallium_buffer0_view, rect.left + blit_x, rect.top + blit_y, blit_w, blit_h);
1224 if(!owns_pipe)
1225 gallium_device->RestoreGalliumState();
1226 }
1227
1228 if(blit_w != dst_w)
1229 pipe->clear_render_target(pipe, dst_surface, black, rect.left + blit_x + blit_w, rect.top, dst_w - blit_x - blit_w, dst_h);
1230 if(blit_h != dst_h)
1231 pipe->clear_render_target(pipe, dst_surface, black, rect.left, rect.top + blit_y + blit_h, dst_w, dst_h - blit_y - blit_h);
1232 }
1233
1234 if(dst_surface)
1235 pipe->surface_destroy(pipe, dst_surface);
1236
1237 pipe->flush(pipe, PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, 0);
1238
1239 att = (db) ? NATIVE_ATTACHMENT_BACK_LEFT : NATIVE_ATTACHMENT_FRONT_LEFT;
1240 if(!surface->present(surface, att, FALSE, 0))
1241 return DXGI_ERROR_DEVICE_REMOVED;
1242
1243 end_present:
1244 parent->backend->EndPresent(desc.OutputWindow, present_cookie);
1245
1246 ++present_count;
1247 return S_OK;
1248 }
1249
1250 virtual HRESULT STDMETHODCALLTYPE GetBuffer(
1251 UINT Buffer,
1252 REFIID riid,
1253 void **ppSurface)
1254 {
1255 if(Buffer > 0)
1256 {
1257 if(desc.SwapEffect == DXGI_SWAP_EFFECT_SEQUENTIAL)
1258 std::cerr << "DXGI unimplemented: GetBuffer(n) with n > 0 not supported, returning buffer 0 instead!" << std::endl;
1259 else
1260 std::cerr << "DXGI error: in GetBuffer(n), n must be 0 for DXGI_SWAP_EFFECT_DISCARD\n" << std::endl;
1261 }
1262
1263 if(!buffer0)
1264 {
1265 HRESULT hr = create_buffer0();
1266 if(!SUCCEEDED(hr))
1267 return hr;
1268 }
1269 return buffer0->QueryInterface(riid, ppSurface);
1270 }
1271
1272 /* TODO: implement somehow */
1273 virtual HRESULT STDMETHODCALLTYPE SetFullscreenState(
1274 BOOL fullscreen,
1275 IDXGIOutput *target)
1276 {
1277 fullscreen = fullscreen;
1278 target = target;
1279 return S_OK;
1280 }
1281
1282 virtual HRESULT STDMETHODCALLTYPE GetFullscreenState(
1283 BOOL *out_fullscreen,
1284 IDXGIOutput **out_target)
1285 {
1286 if(out_fullscreen)
1287 *out_fullscreen = fullscreen;
1288 if(out_target)
1289 *out_target = target.ref();
1290 return S_OK;
1291 }
1292
1293 virtual HRESULT STDMETHODCALLTYPE GetDesc(
1294 DXGI_SWAP_CHAIN_DESC *out_desc)
1295 {
1296 *out_desc = desc;
1297 return S_OK;
1298 }
1299
1300 virtual HRESULT STDMETHODCALLTYPE ResizeBuffers(
1301 UINT buffer_count,
1302 UINT width,
1303 UINT height,
1304 DXGI_FORMAT new_format,
1305 UINT swap_chain_flags)
1306 {
1307 if(buffer0)
1308 {
1309 buffer0.p->AddRef();
1310 ULONG v = buffer0.p->Release();
1311 // we must fail if there are any references to buffer0 other than ours
1312 if(v > 1)
1313 return E_FAIL;
1314 pipe_sampler_view_reference(&gallium_buffer0_view, 0);
1315 buffer0 = (IUnknown*)NULL;
1316 gallium_buffer0 = 0;
1317 }
1318
1319 if(desc.SwapEffect != DXGI_SWAP_EFFECT_SEQUENTIAL)
1320 desc.BufferCount = buffer_count;
1321 desc.BufferDesc.Format = new_format;
1322 desc.BufferDesc.Width = width;
1323 desc.BufferDesc.Height = height;
1324 desc.Flags = swap_chain_flags;
1325 return resolve_zero_width_height();
1326 }
1327
1328 virtual HRESULT STDMETHODCALLTYPE ResizeTarget(
1329 const DXGI_MODE_DESC *out_new_target_parameters)
1330 {
1331 /* TODO: implement */
1332 return S_OK;
1333 }
1334
1335 virtual HRESULT STDMETHODCALLTYPE GetContainingOutput(
1336 IDXGIOutput **out_output)
1337 {
1338 *out_output = adapter->outputs[0].ref();
1339 return S_OK;
1340 }
1341
1342 virtual HRESULT STDMETHODCALLTYPE GetFrameStatistics(
1343 DXGI_FRAME_STATISTICS *out_stats)
1344 {
1345 memset(out_stats, 0, sizeof(*out_stats));
1346 #ifdef _WIN32
1347 QueryPerformanceCounter(&out_stats->SyncQPCTime);
1348 #endif
1349 out_stats->PresentCount = present_count;
1350 out_stats->PresentRefreshCount = present_count;
1351 out_stats->SyncRefreshCount = present_count;
1352 return S_OK;
1353 }
1354
1355 virtual HRESULT STDMETHODCALLTYPE GetLastPresentCount(
1356 UINT *last_present_count)
1357 {
1358 *last_present_count = present_count;
1359 return S_OK;
1360 }
1361 };
1362
1363 static void GalliumDXGISwapChainRevalidate(IDXGISwapChain* swap_chain)
1364 {
1365 ((GalliumDXGISwapChain*)swap_chain)->needs_validation = true;
1366 }
1367
1368 static HRESULT GalliumDXGIAdapterCreate(GalliumDXGIFactory* factory, const struct native_platform* platform, void* dpy, IDXGIAdapter1** out_adapter)
1369 {
1370 try
1371 {
1372 *out_adapter = new GalliumDXGIAdapter(factory, platform, dpy);
1373 return S_OK;
1374 }
1375 catch(HRESULT hr)
1376 {
1377 return hr;
1378 }
1379 }
1380
1381 static HRESULT GalliumDXGIOutputCreate(GalliumDXGIAdapter* adapter, const std::string& name, const struct native_connector* connector, IDXGIOutput** out_output)
1382 {
1383 try
1384 {
1385 *out_output = new GalliumDXGIOutput(adapter, name, connector);
1386 return S_OK;
1387 }
1388 catch(HRESULT hr)
1389 {
1390 return hr;
1391 }
1392 }
1393
1394 static HRESULT GalliumDXGISwapChainCreate(GalliumDXGIFactory* factory, IUnknown* device, const DXGI_SWAP_CHAIN_DESC& desc, IDXGISwapChain** out_swap_chain)
1395 {
1396 try
1397 {
1398 *out_swap_chain = new GalliumDXGISwapChain(factory, device, desc);
1399 return S_OK;
1400 }
1401 catch(HRESULT hr)
1402 {
1403 return hr;
1404 }
1405 }
1406
1407 struct dxgi_binding
1408 {
1409 const struct native_platform* platform;
1410 void* display;
1411 IGalliumDXGIBackend* backend;
1412 };
1413
1414 static dxgi_binding dxgi_default_binding;
1415 static __thread dxgi_binding dxgi_thread_binding;
1416
1417 void STDMETHODCALLTYPE GalliumDXGIUseNothing()
1418 {
1419 dxgi_thread_binding.platform = 0;
1420 dxgi_thread_binding.display = 0;
1421 if(dxgi_thread_binding.backend)
1422 dxgi_thread_binding.backend->Release();
1423 dxgi_thread_binding.backend = 0;
1424 }
1425
1426 #ifdef GALLIUM_DXGI_USE_X11
1427 void STDMETHODCALLTYPE GalliumDXGIUseX11Display(Display* dpy, IGalliumDXGIBackend* backend)
1428 {
1429 GalliumDXGIUseNothing();
1430 dxgi_thread_binding.platform = native_get_x11_platform();
1431 dxgi_thread_binding.display = dpy;
1432
1433 if(backend)
1434 {
1435 dxgi_thread_binding.backend = backend;
1436 backend->AddRef();
1437 }
1438 }
1439 #endif
1440
1441 /*
1442 #ifdef GALLIUM_DXGI_USE_DRM
1443 void STDMETHODCALLTYPE GalliumDXGIUseDRMCard(int fd)
1444 {
1445 GalliumDXGIUseNothing();
1446 dxgi_thread_binding.platform = native_get_drm_platform();
1447 dxgi_thread_binding.display = (void*)fd;
1448 dxgi_thread_binding.backend = 0;
1449 }
1450 #endif
1451
1452 #ifdef GALLIUM_DXGI_USE_FBDEV
1453 void STDMETHODCALLTYPE GalliumDXGIUseFBDev(int fd)
1454 {
1455 GalliumDXGIUseNothing();
1456 dxgi_thread_binding.platform = native_get_fbdev_platform();
1457 dxgi_thread_binding.display = (void*)fd;
1458 dxgi_thread_binding.backend = 0;
1459 }
1460 #endif
1461
1462 #ifdef GALLIUM_DXGI_USE_GDI
1463 void STDMETHODCALLTYPE GalliumDXGIUseHDC(HDC hdc, PFNHWNDRESOLVER resolver, void* resolver_cookie)
1464 {
1465 GalliumDXGIUseNothing();
1466 dxgi_thread_binding.platform = native_get_gdi_platform();
1467 dxgi_thread_binding.display = (void*)hdc;
1468 dxgi_thread_binding.backend = 0;
1469 }
1470 #endif
1471 */
1472 void STDMETHODCALLTYPE GalliumDXGIMakeDefault()
1473 {
1474 if(dxgi_default_binding.backend)
1475 dxgi_default_binding.backend->Release();
1476 dxgi_default_binding = dxgi_thread_binding;
1477 if(dxgi_default_binding.backend)
1478 dxgi_default_binding.backend->AddRef();
1479 }
1480
1481 /* TODO: why did Microsoft add this? should we do something different for DXGI 1.0 and 1.1?
1482 * Or perhaps what they actually mean is "only create a single factory in your application"?
1483 * TODO: should we use a singleton here, so we never have multiple DXGI objects for the same thing? */
1484 HRESULT STDMETHODCALLTYPE CreateDXGIFactory1(
1485 REFIID riid,
1486 void **out_factory
1487 )
1488 {
1489 GalliumDXGIFactory* factory;
1490 *out_factory = 0;
1491 if(dxgi_thread_binding.platform)
1492 factory = new GalliumDXGIFactory(dxgi_thread_binding.platform, dxgi_thread_binding.display, dxgi_thread_binding.backend);
1493 else if(dxgi_default_binding.platform)
1494 factory = new GalliumDXGIFactory(dxgi_default_binding.platform, dxgi_default_binding.display, dxgi_default_binding.backend);
1495 else
1496 factory = new GalliumDXGIFactory(native_get_x11_platform(), NULL, NULL);
1497 HRESULT hres = factory->QueryInterface(riid, out_factory);
1498 factory->Release();
1499 return hres;
1500 }
1501
1502 HRESULT STDMETHODCALLTYPE CreateDXGIFactory(
1503 REFIID riid,
1504 void **out_factor
1505 )
1506 {
1507 return CreateDXGIFactory1(riid, out_factor);
1508 }