summaryrefslogtreecommitdiffstats
path: root/video/out/opengl/context_dxinterop.c
blob: 507c150d1547c1fcdf4c7178a40d95dbbf7b5df6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
/*
 * This file is part of mpv.
 *
 * mpv is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * mpv is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with mpv.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <windows.h>
#include <versionhelpers.h>
#include <d3d9.h>
#include <dwmapi.h>
#include "osdep/windows_utils.h"
#include "video/out/w32_common.h"
#include "context.h"

// For WGL_ACCESS_WRITE_DISCARD_NV, etc.
#include <GL/wglext.h>

EXTERN_C IMAGE_DOS_HEADER __ImageBase;
#define HINST_THISCOMPONENT ((HINSTANCE)&__ImageBase)

// mingw-w64 header typo?
#ifndef IDirect3DSwapChain9Ex_GetBackBuffer
#define IDirect3DSwapChain9Ex_GetBackBuffer IDirect3DSwapChain9EX_GetBackBuffer
#endif

struct priv {
    HMODULE d3d9_dll;
    HRESULT (WINAPI *Direct3DCreate9Ex)(UINT SDKVersion, IDirect3D9Ex **ppD3D);

    // Direct3D9 device and resources
    IDirect3D9Ex *d3d9ex;
    IDirect3DDevice9Ex *device;
    HANDLE device_h;
    IDirect3DSwapChain9Ex *swapchain;
    IDirect3DSurface9 *backbuffer;
    IDirect3DSurface9 *rtarget;
    HANDLE rtarget_h;

    // OpenGL offscreen context
    HWND os_wnd;
    HDC os_dc;
    HGLRC os_ctx;

    // OpenGL resources
    GLuint texture;

    // Did we lose the device?
    bool lost_device;

    // Requested and current parameters
    int requested_swapinterval;
    int width, height, swapinterval;
};

static __thread struct MPGLContext *current_ctx;

static void pump_message_loop(void)
{
    // We have a hidden window on this thread (for the OpenGL context,) so pump
    // its message loop at regular intervals to be safe
    MSG message;
    while (PeekMessageW(&message, NULL, 0, 0, PM_REMOVE))
        DispatchMessageW(&message);
}

static void *w32gpa(const GLubyte *procName)
{
    HMODULE oglmod;
    void *res = wglGetProcAddress(procName);
    if (res)
        return res;
    oglmod = GetModuleHandleW(L"opengl32.dll");
    return GetProcAddress(oglmod, procName);
}

static int os_ctx_create(struct MPGLContext *ctx)
{
    static const wchar_t os_wnd_class[] = L"mpv offscreen gl";
    struct priv *p = ctx->priv;
    HGLRC legacy_context = NULL;

    RegisterClassExW(&(WNDCLASSEXW) {
        .cbSize = sizeof(WNDCLASSEXW),
        .style = CS_OWNDC,
        .lpfnWndProc = DefWindowProc,
        .hInstance = HINST_THISCOMPONENT,
        .lpszClassName = os_wnd_class,
    });

    // Create a hidden window for an offscreen OpenGL context. It might also be
    // possible to use the VO window, but MSDN recommends against drawing to
    // the same window with flip mode present and other APIs, so play it safe.
    p->os_wnd = CreateWindowExW(0, os_wnd_class, os_wnd_class, 0, 0, 0, 200,
        200, NULL, NULL, HINST_THISCOMPONENT, NULL);
    p->os_dc = GetDC(p->os_wnd);
    if (!p->os_dc) {
        MP_FATAL(ctx->vo, "Couldn't create window for offscreen rendering\n");
        goto fail;
    }

    // Choose a pixel format. It probably doesn't matter what this is because
    // the primary framebuffer will not be used.
    PIXELFORMATDESCRIPTOR pfd = {
        .nSize = sizeof pfd,
        .nVersion = 1,
        .dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER,
        .iPixelType = PFD_TYPE_RGBA,
        .cColorBits = 24,
        .iLayerType = PFD_MAIN_PLANE,
    };
    int pf = ChoosePixelFormat(p->os_dc, &pfd);
    if (!pf) {
        MP_FATAL(ctx->vo,
                 "Couldn't choose pixelformat for offscreen rendering: %s\n",
                 mp_LastError_to_str());
        goto fail;
    }
    SetPixelFormat(p->os_dc, pf, &pfd);

    legacy_context = wglCreateContext(p->os_dc);
    if (!legacy_context || !wglMakeCurrent(p->os_dc, legacy_context)) {
        MP_FATAL(ctx->vo, "Couldn't create OpenGL context for offscreen rendering: %s\n",
                 mp_LastError_to_str());
        goto fail;
    }

    const char *(GLAPIENTRY *wglGetExtensionsStringARB)(HDC hdc)
        = w32gpa((const GLubyte*)"wglGetExtensionsStringARB");
    if (!wglGetExtensionsStringARB) {
        MP_FATAL(ctx->vo, "The OpenGL driver does not support OpenGL 3.x\n");
        goto fail;
    }

    const char *wgl_exts = wglGetExtensionsStringARB(p->os_dc);
    if (!strstr(wgl_exts, "WGL_ARB_create_context")) {
        MP_FATAL(ctx->vo, "The OpenGL driver does not support OpenGL 3.x\n");
        goto fail;
    }

    HGLRC (GLAPIENTRY *wglCreateContextAttribsARB)(HDC hDC, HGLRC hShareContext,
                                                   const int *attribList)
        = w32gpa((const GLubyte*)"wglCreateContextAttribsARB");
    if (!wglCreateContextAttribsARB) {
        MP_FATAL(ctx->vo, "The OpenGL driver does not support OpenGL 3.x\n");
        goto fail;
    }

    int attribs[] = {
        WGL_CONTEXT_MAJOR_VERSION_ARB, 3,
        WGL_CONTEXT_MINOR_VERSION_ARB, 0,
        WGL_CONTEXT_FLAGS_ARB, 0,
        WGL_CONTEXT_PROFILE_MASK_ARB, WGL_CONTEXT_CORE_PROFILE_BIT_ARB,
        0
    };

    p->os_ctx = wglCreateContextAttribsARB(p->os_dc, 0, attribs);
    if (!p->os_ctx) {
        // NVidia, instead of ignoring WGL_CONTEXT_FLAGS_ARB, will error out if
        // it's present on pre-3.2 contexts.
        // Remove it from attribs and retry the context creation.
        attribs[6] = attribs[7] = 0;
        p->os_ctx = wglCreateContextAttribsARB(p->os_dc, 0, attribs);
    }
    if (!p->os_ctx) {
        MP_FATAL(ctx->vo,
                 "Couldn't create OpenGL 3.x context for offscreen rendering: %s\n",
                 mp_LastError_to_str());
        goto fail;
    }

    wglMakeCurrent(p->os_dc, NULL);
    wglDeleteContext(legacy_context);
    legacy_context = NULL;

    if (!wglMakeCurrent(p->os_dc, p->os_ctx)) {
        MP_FATAL(ctx->vo,
                 "Couldn't activate OpenGL 3.x context for offscreen rendering: %s\n",
                 mp_LastError_to_str());
        goto fail;
    }

    mpgl_load_functions(ctx->gl, w32gpa, wgl_exts, ctx->vo->log);
    if (!(ctx->gl->mpgl_caps & MPGL_CAP_DXINTEROP)) {
        MP_FATAL(ctx->vo, "WGL_NV_DX_interop is not supported\n");
        goto fail;
    }

    return 0;
fail:
    if (legacy_context) {
        wglMakeCurrent(p->os_dc, NULL);
        wglDeleteContext(legacy_context);
    }
    return -1;
}

static void os_ctx_destroy(MPGLContext *ctx)
{
    struct priv *p = ctx->priv;

    if (p->os_ctx) {
        wglMakeCurrent(p->os_dc, NULL);
        wglDeleteContext(p->os_ctx);
    }
    if (p->os_dc)
        ReleaseDC(p->os_wnd, p->os_dc);
    if (p->os_wnd)
        DestroyWindow(p->os_wnd);
}

static int d3d_size_dependent_create(MPGLContext *ctx)
{
    struct priv *p = ctx->priv;
    struct GL *gl = ctx->gl;
    HRESULT hr;

    IDirect3DSwapChain9 *sw9;
    hr = IDirect3DDevice9Ex_GetSwapChain(p->device, 0, &sw9);
    if (FAILED(hr)) {
        MP_ERR(ctx->vo, "Couldn't get swap chain: %s\n", mp_HRESULT_to_str(hr));
        return -1;
    }

    hr = IDirect3DSwapChain9_QueryInterface(sw9, &IID_IDirect3DSwapChain9Ex,
        (void**)&p->swapchain);
    if (FAILED(hr)) {
        SAFE_RELEASE(sw9);
        MP_ERR(ctx->vo, "Obtained swap chain is not IDirect3DSwapChain9Ex: %s\n",
               mp_HRESULT_to_str(hr));
        return -1;
    }
    SAFE_RELEASE(sw9);

    hr = IDirect3DSwapChain9Ex_GetBackBuffer(p->swapchain, 0,
        D3DBACKBUFFER_TYPE_MONO, &p->backbuffer);
    if (FAILED(hr)) {
        MP_ERR(ctx->vo, "Couldn't get backbuffer: %s\n", mp_HRESULT_to_str(hr));
        return -1;
    }

    // Get the format of the backbuffer
    D3DSURFACE_DESC bb_desc = { 0 };
    IDirect3DSurface9_GetDesc(p->backbuffer, &bb_desc);

    MP_VERBOSE(ctx->vo, "DX_interop backbuffer size: %ux%u\n",
        (unsigned)bb_desc.Width, (unsigned)bb_desc.Height);
    MP_VERBOSE(ctx->vo, "DX_interop backbuffer format: %u\n",
        (unsigned)bb_desc.Format);

    // Create a rendertarget with the same format as the backbuffer for
    // rendering from OpenGL
    HANDLE share_handle = NULL;
    hr = IDirect3DDevice9Ex_CreateRenderTarget(p->device, bb_desc.Width,
        bb_desc.Height, bb_desc.Format, D3DMULTISAMPLE_NONE, 0, FALSE,
        &p->rtarget, &share_handle);
    if (FAILED(hr)) {
        MP_ERR(ctx->vo, "Couldn't create rendertarget: %s\n", mp_HRESULT_to_str(hr));
        return -1;
    }

    // Register the share handle with WGL_NV_DX_interop. Nvidia does not
    // require the use of share handles, but Intel does.
    if (share_handle)
        gl->DXSetResourceShareHandleNV(p->rtarget, share_handle);

    // Create the OpenGL-side texture
    gl->GenTextures(1, &p->texture);

    // Now share the rendertarget with OpenGL as a texture
    p->rtarget_h = gl->DXRegisterObjectNV(p->device_h, p->rtarget, p->texture,
        GL_TEXTURE_2D, WGL_ACCESS_WRITE_DISCARD_NV);
    if (!p->rtarget_h) {
        MP_ERR(ctx->vo, "Couldn't share rendertarget with OpenGL: %s\n",
               mp_LastError_to_str());
        return -1;
    }

    // Lock the rendertarget for use from OpenGL. This will only be unlocked in
    // swap_buffers() when it is blitted to the real Direct3D backbuffer.
    if (!gl->DXLockObjectsNV(p->device_h, 1, &p->rtarget_h)) {
        MP_ERR(ctx->vo, "Couldn't lock rendertarget: %s\n",
               mp_LastError_to_str());
        return -1;
    }

    gl->BindFramebuffer(GL_FRAMEBUFFER, ctx->main_fb);
    gl->FramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
        GL_TEXTURE_2D, p->texture, 0);
    gl->BindFramebuffer(GL_FRAMEBUFFER, 0);

    return 0;
}

static void d3d_size_dependent_destroy(MPGLContext *ctx)
{
    struct priv *p = ctx->priv;
    struct GL *gl = ctx->gl;

    if (p->rtarget_h) {
        gl->DXUnlockObjectsNV(p->device_h, 1, &p->rtarget_h);
        gl->DXUnregisterObjectNV(p->device_h, p->rtarget_h);
    }
    p->rtarget_h = 0;
    if (p->texture)
        gl->DeleteTextures(1, &p->texture);
    p->texture = 0;

    SAFE_RELEASE(p->rtarget);
    SAFE_RELEASE(p->backbuffer);
    SAFE_RELEASE(p->swapchain);
}

static void fill_presentparams(MPGLContext *ctx, D3DPRESENT_PARAMETERS *pparams)
{
    struct priv *p = ctx->priv;

    // Present intervals other than IMMEDIATE and ONE don't seem to work. It's
    // possible that they're not compatible with FLIPEX.
    UINT presentation_interval;
    switch (p->requested_swapinterval) {
    case 0:  presentation_interval = D3DPRESENT_INTERVAL_IMMEDIATE; break;
    case 1:  presentation_interval = D3DPRESENT_INTERVAL_ONE;       break;
    default: presentation_interval = D3DPRESENT_INTERVAL_ONE;       break;
    }

    *pparams = (D3DPRESENT_PARAMETERS) {
        .Windowed = TRUE,
        .BackBufferWidth = ctx->vo->dwidth ? ctx->vo->dwidth : 1,
        .BackBufferHeight = ctx->vo->dheight ? ctx->vo->dheight : 1,
        // The length of the backbuffer queue shouldn't affect latency because
        // swap_buffers() always uses the backbuffer at the head of the queue
        // and presents it immediately. MSDN says there is a performance
        // penalty for having a short backbuffer queue and this seems to be
        // true, at least on Nvidia, where less than four backbuffers causes
        // very high CPU usage. Use six to be safe.
        .BackBufferCount = 6,
        .SwapEffect = IsWindows7OrGreater() ? D3DSWAPEFFECT_FLIPEX : D3DSWAPEFFECT_FLIP,
        // Automatically get the backbuffer format from the display format
        .BackBufferFormat = D3DFMT_UNKNOWN,
        .PresentationInterval = presentation_interval,
        .hDeviceWindow = vo_w32_hwnd(ctx->vo),
    };
}

static int d3d_create(MPGLContext *ctx)
{
    struct priv *p = ctx->priv;
    struct GL *gl = ctx->gl;
    HRESULT hr;

    p->d3d9_dll = LoadLibraryW(L"d3d9.dll");
    if (!p->d3d9_dll) {
        MP_FATAL(ctx->vo, "Failed to load \"d3d9.dll\": %s\n",
                 mp_LastError_to_str());
        return -1;
    }

    // WGL_NV_dx_interop requires Direct3D 9Ex on WDDM systems. Direct3D 9Ex
    // also enables flip mode present for efficient rendering with the DWM.
    p->Direct3DCreate9Ex = (void*)GetProcAddress(p->d3d9_dll,
        "Direct3DCreate9Ex");
    if (!p->Direct3DCreate9Ex) {
        MP_FATAL(ctx->vo, "Direct3D 9Ex not supported\n");
        return -1;
    }

    hr = p->Direct3DCreate9Ex(D3D_SDK_VERSION, &p->d3d9ex);
    if (FAILED(hr)) {
        MP_FATAL(ctx->vo, "Couldn't create Direct3D9Ex: %s\n",
                 mp_HRESULT_to_str(hr));
        return -1;
    }

    D3DPRESENT_PARAMETERS pparams;
    fill_presentparams(ctx, &pparams);

    hr = IDirect3D9Ex_CreateDeviceEx(p->d3d9ex, D3DADAPTER_DEFAULT,
        D3DDEVTYPE_HAL, vo_w32_hwnd(ctx->vo),
        D3DCREATE_HARDWARE_VERTEXPROCESSING | D3DCREATE_PUREDEVICE |
        D3DCREATE_FPU_PRESERVE | D3DCREATE_MULTITHREADED |
        D3DCREATE_NOWINDOWCHANGES,
        &pparams, NULL, &p->device);
    if (FAILED(hr)) {
        MP_FATAL(ctx->vo, "Couldn't create device: %s\n", mp_HRESULT_to_str(hr));
        return -1;
    }

    // mpv expects frames to be presented right after swap_buffers() returns
    IDirect3DDevice9Ex_SetMaximumFrameLatency(p->device, 1);

    // Register the Direct3D device with WGL_NV_dx_interop
    p->device_h = gl->DXOpenDeviceNV(p->device);
    if (!p->device_h) {
        MP_FATAL(ctx->vo, "Couldn't open Direct3D device from OpenGL: %s\n",
                 mp_LastError_to_str());
        return -1;
    }

    return 0;
}

static void d3d_destroy(MPGLContext *ctx)
{
    struct priv *p = ctx->priv;
    struct GL *gl = ctx->gl;

    if (p->device_h)
        gl->DXCloseDeviceNV(p->device_h);
    SAFE_RELEASE(p->device);
    SAFE_RELEASE(p->d3d9ex);
    if (p->d3d9_dll)
        FreeLibrary(p->d3d9_dll);
}

static void dxinterop_uninit(MPGLContext *ctx)
{
    d3d_size_dependent_destroy(ctx);
    d3d_destroy(ctx);
    os_ctx_destroy(ctx);
    vo_w32_uninit(ctx->vo);
    DwmEnableMMCSS(FALSE);
    pump_message_loop();
}

static void dxinterop_reset(struct MPGLContext *ctx)
{
    struct priv *p = ctx->priv;
    HRESULT hr;

    // Check if the device actually needs to be reset
    if (ctx->vo->dwidth == p->width && ctx->vo->dheight == p->height &&
        p->requested_swapinterval == p->swapinterval && !p->lost_device)
        return;

    d3d_size_dependent_destroy(ctx);

    D3DPRESENT_PARAMETERS pparams;
    fill_presentparams(ctx, &pparams);

    hr = IDirect3DDevice9Ex_ResetEx(p->device, &pparams, NULL);
    if (FAILED(hr)) {
        p->lost_device = true;
        MP_ERR(ctx->vo, "Couldn't reset device: %s\n", mp_HRESULT_to_str(hr));
        return;
    }

    if (d3d_size_dependent_create(ctx) < 0) {
        p->lost_device = true;
        MP_ERR(ctx->vo, "Couldn't recreate Direct3D objects after reset\n");
        return;
    }

    MP_VERBOSE(ctx->vo, "Direct3D device reset\n");
    p->width = ctx->vo->dwidth;
    p->height = ctx->vo->dheight;
    p->swapinterval = p->requested_swapinterval;
    p->lost_device = false;
}

static int GLAPIENTRY dxinterop_swap_interval(int interval)
{
    if (!current_ctx)
        return 0;
    struct priv *p = current_ctx->priv;

    p->requested_swapinterval = interval;
    dxinterop_reset(current_ctx);
    return 1;
}

static void * GLAPIENTRY dxinterop_get_native_display(const char *name)
{
    if (!current_ctx || !name)
        return NULL;
    struct priv *p = current_ctx->priv;

    if (p->device && strcmp("IDirect3DDevice9Ex", name) == 0) {
        return p->device;
    } else if (p->device_h && strcmp("dxinterop_device_HANDLE", name) == 0) {
        return p->device_h;
    }
    return NULL;
}

static int dxinterop_init(struct MPGLContext *ctx, int flags)
{
    struct priv *p = ctx->priv;
    struct GL *gl = ctx->gl;

    p->requested_swapinterval = 1;

    if (!vo_w32_init(ctx->vo))
        goto fail;
    if (os_ctx_create(ctx) < 0)
        goto fail;

    // Create the shared framebuffer
    gl->GenFramebuffers(1, &ctx->main_fb);

    current_ctx = ctx;
    gl->SwapInterval = dxinterop_swap_interval;
    gl->MPGetNativeDisplay = dxinterop_get_native_display;

    if (d3d_create(ctx) < 0)
        goto fail;
    if (d3d_size_dependent_create(ctx) < 0)
        goto fail;

    // The OpenGL and Direct3D coordinate systems are flipped vertically
    // relative to each other. Flip the video during rendering so it can be
    // copied to the Direct3D backbuffer with a simple (and fast) StretchRect.
    ctx->flip_v = true;

    DwmEnableMMCSS(TRUE);

    return 0;
fail:
    dxinterop_uninit(ctx);
    return -1;
}

static int dxinterop_reconfig(struct MPGLContext *ctx)
{
    vo_w32_config(ctx->vo);
    return 0;
}

static void dxinterop_swap_buffers(MPGLContext *ctx)
{
    struct priv *p = ctx->priv;
    struct GL *gl = ctx->gl;
    HRESULT hr;

    pump_message_loop();

    // If the device is still lost, try to reset it again
    if (p->lost_device)
        dxinterop_reset(ctx);
    if (p->lost_device)
        return;

    if (!gl->DXUnlockObjectsNV(p->device_h, 1, &p->rtarget_h)) {
        MP_ERR(ctx->vo, "Couldn't unlock rendertarget for present: %s\n",
               mp_LastError_to_str());
        return;
    }

    // Blit the OpenGL rendertarget to the backbuffer
    hr = IDirect3DDevice9Ex_StretchRect(p->device, p->rtarget, NULL,
                                        p->backbuffer, NULL, D3DTEXF_NONE);
    if (FAILED(hr)) {
        MP_ERR(ctx->vo, "Couldn't stretchrect for present: %s\n",
               mp_HRESULT_to_str(hr));
        return;
    }

    hr = IDirect3DDevice9Ex_PresentEx(p->device, NULL, NULL, NULL, NULL, 0);
    switch (hr) {
    case D3DERR_DEVICELOST:
    case D3DERR_DEVICEHUNG:
        MP_VERBOSE(ctx->vo, "Direct3D device lost! Resetting.\n");
        p->lost_device = true;
        dxinterop_reset(ctx);
        return;
    default:
        if (FAILED(hr))
            MP_ERR(ctx->vo, "Failed to present: %s\n", mp_HRESULT_to_str(hr));
    }

    if (!gl->DXLockObjectsNV(p->device_h, 1, &p->rtarget_h)) {
        MP_ERR(ctx->vo, "Couldn't lock rendertarget after present: %s\n",
               mp_LastError_to_str());
    }
}

static int dxinterop_control(MPGLContext *ctx, int *events, int request,
                             void *arg)
{
    int r = vo_w32_control(ctx->vo, events, request, arg);
    if (*events & VO_EVENT_RESIZE)
        dxinterop_reset(ctx);
    return r;
}

const struct mpgl_driver mpgl_driver_dxinterop = {
    .name         = "dxinterop",
    .priv_size    = sizeof(struct priv),
    .init         = dxinterop_init,
    .reconfig     = dxinterop_reconfig,
    .swap_buffers = dxinterop_swap_buffers,
    .control      = dxinterop_control,
    .uninit       = dxinterop_uninit,
};