context.c@ 32651

Last change on this file since 32651 was 32651, checked in by vboxsync, 14 years ago
wddm/3d: fix libwine crashes on winsat run
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1	/*
2	* Context and render target management in wined3d
3	*
4	* Copyright 2007-2008 Stefan Dösinger for CodeWeavers
5	* Copyright 2009 Henri Verbeet for CodeWeavers
6	*
7	* This library is free software; you can redistribute it and/or
8	* modify it under the terms of the GNU Lesser General Public
9	* License as published by the Free Software Foundation; either
10	* version 2.1 of the License, or (at your option) any later version.
11	*
12	* This library is distributed in the hope that it will be useful,
13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15	* Lesser General Public License for more details.
16	*
17	* You should have received a copy of the GNU Lesser General Public
18	* License along with this library; if not, write to the Free Software
19	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
20	*/
21	/*
22	* Sun LGPL Disclaimer: For the avoidance of doubt, except that if any license choice
23	* other than GPL or LGPL is available it will apply instead, Sun elects to use only
24	* the Lesser General Public License version 2.1 (LGPLv2) at this time for any software where
25	* a choice of LGPL license versions is made available with the language indicating
26	* that LGPLv2 or any later version may be used, or where a choice of which version
27	* of the LGPL is applied is otherwise unspecified.
28	*/
29
30
31	#include "config.h"
32	#include <stdio.h>
33	#ifdef HAVE_FLOAT_H
34	# include <float.h>
35	#endif
36	#include "wined3d_private.h"
37
38	WINE_DEFAULT_DEBUG_CHANNEL(d3d);
39
40	#define GLINFO_LOCATION (*gl_info)
41
42	static DWORD wined3d_context_tls_idx;
43
44	/* FBO helper functions */
45
46	/* GL locking is done by the caller */
47	void context_bind_fbo(struct wined3d_context context, GLenum target, GLuint fbo)
48	{
49	const struct wined3d_gl_info *gl_info = context->gl_info;
50	GLuint f;
51
52	if (!fbo)
53	{
54	f = 0;
55	}
56	else
57	{
58	if (!*fbo)
59	{
60	gl_info->fbo_ops.glGenFramebuffers(1, fbo);
61	checkGLcall("glGenFramebuffers()");
62	TRACE("Created FBO %u.\n", *fbo);
63	}
64	f = *fbo;
65	}
66
67	switch (target)
68	{
69	case GL_READ_FRAMEBUFFER:
70	if (context->fbo_read_binding == f) return;
71	context->fbo_read_binding = f;
72	break;
73
74	case GL_DRAW_FRAMEBUFFER:
75	if (context->fbo_draw_binding == f) return;
76	context->fbo_draw_binding = f;
77	break;
78
79	case GL_FRAMEBUFFER:
80	if (context->fbo_read_binding == f
81	&& context->fbo_draw_binding == f) return;
82	context->fbo_read_binding = f;
83	context->fbo_draw_binding = f;
84	break;
85
86	default:
87	FIXME("Unhandled target %#x.\n", target);
88	break;
89	}
90
91	gl_info->fbo_ops.glBindFramebuffer(target, f);
92	checkGLcall("glBindFramebuffer()");
93	}
94
95	/* GL locking is done by the caller */
96	static void context_clean_fbo_attachments(const struct wined3d_gl_info *gl_info)
97	{
98	unsigned int i;
99
100	for (i = 0; i < gl_info->limits.buffers; ++i)
101	{
102	gl_info->fbo_ops.glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + i, GL_TEXTURE_2D, 0, 0);
103	checkGLcall("glFramebufferTexture2D()");
104	}
105	gl_info->fbo_ops.glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
106	checkGLcall("glFramebufferTexture2D()");
107
108	gl_info->fbo_ops.glFramebufferTexture2D(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
109	checkGLcall("glFramebufferTexture2D()");
110	}
111
112	/* GL locking is done by the caller */
113	static void context_destroy_fbo(struct wined3d_context context, GLuint fbo)
114	{
115	const struct wined3d_gl_info *gl_info = context->gl_info;
116
117	context_bind_fbo(context, GL_FRAMEBUFFER, fbo);
118	context_clean_fbo_attachments(gl_info);
119	context_bind_fbo(context, GL_FRAMEBUFFER, NULL);
120
121	gl_info->fbo_ops.glDeleteFramebuffers(1, fbo);
122	checkGLcall("glDeleteFramebuffers()");
123	}
124
125	/* GL locking is done by the caller */
126	static void context_apply_attachment_filter_states(IWineD3DSurfaceImpl *surface)
127	{
128	IWineD3DBaseTextureImpl *texture_impl;
129
130	/* Update base texture states array */
131	if (SUCCEEDED(IWineD3DSurface_GetContainer((IWineD3DSurface *)surface,
132	&IID_IWineD3DBaseTexture, (void **)&texture_impl)))
133	{
134	IWineD3DDeviceImpl *device = surface->resource.device;
135	BOOL update_minfilter = FALSE;
136	BOOL update_magfilter = FALSE;
137
138	if (texture_impl->baseTexture.texture_rgb.states[WINED3DTEXSTA_MINFILTER] != WINED3DTEXF_POINT
139	\|\| texture_impl->baseTexture.texture_rgb.states[WINED3DTEXSTA_MIPFILTER] != WINED3DTEXF_NONE)
140	{
141	texture_impl->baseTexture.texture_rgb.states[WINED3DTEXSTA_MINFILTER] = WINED3DTEXF_POINT;
142	texture_impl->baseTexture.texture_rgb.states[WINED3DTEXSTA_MIPFILTER] = WINED3DTEXF_NONE;
143	update_minfilter = TRUE;
144	}
145
146	if (texture_impl->baseTexture.texture_rgb.states[WINED3DTEXSTA_MAGFILTER] != WINED3DTEXF_POINT)
147	{
148	texture_impl->baseTexture.texture_rgb.states[WINED3DTEXSTA_MAGFILTER] = WINED3DTEXF_POINT;
149	update_magfilter = TRUE;
150	}
151
152	if (texture_impl->baseTexture.bindCount)
153	{
154	WARN("Render targets should not be bound to a sampler\n");
155	IWineD3DDeviceImpl_MarkStateDirty(device, STATE_SAMPLER(texture_impl->baseTexture.sampler));
156	}
157
158	IWineD3DBaseTexture_Release((IWineD3DBaseTexture *)texture_impl);
159
160	if (update_minfilter \|\| update_magfilter)
161	{
162	GLenum target, bind_target;
163	GLint old_binding;
164
165	target = surface->texture_target;
166	if (target == GL_TEXTURE_2D)
167	{
168	bind_target = GL_TEXTURE_2D;
169	glGetIntegerv(GL_TEXTURE_BINDING_2D, &old_binding);
170	}
171	else if (target == GL_TEXTURE_RECTANGLE_ARB)
172	{
173	bind_target = GL_TEXTURE_RECTANGLE_ARB;
174	glGetIntegerv(GL_TEXTURE_BINDING_RECTANGLE_ARB, &old_binding);
175	}
176	else
177	{
178	bind_target = GL_TEXTURE_CUBE_MAP_ARB;
179	glGetIntegerv(GL_TEXTURE_BINDING_CUBE_MAP_ARB, &old_binding);
180	}
181
182	glBindTexture(bind_target, surface->texture_name);
183	if (update_minfilter) glTexParameteri(bind_target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
184	if (update_magfilter) glTexParameteri(bind_target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
185	glBindTexture(bind_target, old_binding);
186	}
187
188	checkGLcall("apply_attachment_filter_states()");
189	}
190	}
191
192	/* GL locking is done by the caller */
193	void context_attach_depth_stencil_fbo(struct wined3d_context *context,
194	GLenum fbo_target, IWineD3DSurfaceImpl *depth_stencil, BOOL use_render_buffer)
195	{
196	const struct wined3d_gl_info *gl_info = context->gl_info;
197
198	TRACE("Attach depth stencil %p\n", depth_stencil);
199
200	if (depth_stencil)
201	{
202	DWORD format_flags = depth_stencil->resource.format_desc->Flags;
203
204	if (use_render_buffer && depth_stencil->current_renderbuffer)
205	{
206	if (format_flags & WINED3DFMT_FLAG_DEPTH)
207	{
208	gl_info->fbo_ops.glFramebufferRenderbuffer(fbo_target, GL_DEPTH_ATTACHMENT,
209	GL_RENDERBUFFER, depth_stencil->current_renderbuffer->id);
210	checkGLcall("glFramebufferRenderbuffer()");
211	}
212
213	if (format_flags & WINED3DFMT_FLAG_STENCIL)
214	{
215	gl_info->fbo_ops.glFramebufferRenderbuffer(fbo_target, GL_STENCIL_ATTACHMENT,
216	GL_RENDERBUFFER, depth_stencil->current_renderbuffer->id);
217	checkGLcall("glFramebufferRenderbuffer()");
218	}
219	}
220	else
221	{
222	surface_prepare_texture(depth_stencil, gl_info, FALSE);
223	context_apply_attachment_filter_states(depth_stencil);
224
225	if (format_flags & WINED3DFMT_FLAG_DEPTH)
226	{
227	gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_DEPTH_ATTACHMENT,
228	depth_stencil->texture_target, depth_stencil->texture_name,
229	depth_stencil->texture_level);
230	checkGLcall("glFramebufferTexture2D()");
231	}
232
233	if (format_flags & WINED3DFMT_FLAG_STENCIL)
234	{
235	gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_STENCIL_ATTACHMENT,
236	depth_stencil->texture_target, depth_stencil->texture_name,
237	depth_stencil->texture_level);
238	checkGLcall("glFramebufferTexture2D()");
239	}
240	}
241
242	if (!(format_flags & WINED3DFMT_FLAG_DEPTH))
243	{
244	gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
245	checkGLcall("glFramebufferTexture2D()");
246	}
247
248	if (!(format_flags & WINED3DFMT_FLAG_STENCIL))
249	{
250	gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
251	checkGLcall("glFramebufferTexture2D()");
252	}
253	}
254	else
255	{
256	gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
257	checkGLcall("glFramebufferTexture2D()");
258
259	gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
260	checkGLcall("glFramebufferTexture2D()");
261	}
262	}
263
264	/* GL locking is done by the caller */
265	void context_attach_surface_fbo(const struct wined3d_context *context,
266	GLenum fbo_target, DWORD idx, IWineD3DSurfaceImpl *surface)
267	{
268	const struct wined3d_gl_info *gl_info = context->gl_info;
269
270	TRACE("Attach surface %p to %u\n", surface, idx);
271
272	if (surface)
273	{
274	surface_prepare_texture(surface, gl_info, FALSE);
275	context_apply_attachment_filter_states(surface);
276
277	gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_COLOR_ATTACHMENT0 + idx, surface->texture_target,
278	surface->texture_name, surface->texture_level);
279	checkGLcall("glFramebufferTexture2D()");
280	}
281	else
282	{
283	gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_COLOR_ATTACHMENT0 + idx, GL_TEXTURE_2D, 0, 0);
284	checkGLcall("glFramebufferTexture2D()");
285	}
286	}
287
288	/* GL locking is done by the caller */
289	static void context_check_fbo_status(struct wined3d_context *context)
290	{
291	const struct wined3d_gl_info *gl_info = context->gl_info;
292	GLenum status;
293
294	status = gl_info->fbo_ops.glCheckFramebufferStatus(GL_FRAMEBUFFER);
295	if (status == GL_FRAMEBUFFER_COMPLETE)
296	{
297	TRACE("FBO complete\n");
298	} else {
299	IWineD3DSurfaceImpl *attachment;
300	unsigned int i;
301	FIXME("FBO status %s (%#x)\n", debug_fbostatus(status), status);
302
303	if (!context->current_fbo)
304	{
305	ERR("FBO 0 is incomplete, driver bug?\n");
306	return;
307	}
308
309	/* Dump the FBO attachments */
310	for (i = 0; i < gl_info->limits.buffers; ++i)
311	{
312	attachment = context->current_fbo->render_targets[i];
313	if (attachment)
314	{
315	FIXME("\tColor attachment %d: (%p) %s %ux%u\n",
316	i, attachment, debug_d3dformat(attachment->resource.format_desc->format),
317	attachment->pow2Width, attachment->pow2Height);
318	}
319	}
320	attachment = context->current_fbo->depth_stencil;
321	if (attachment)
322	{
323	FIXME("\tDepth attachment: (%p) %s %ux%u\n",
324	attachment, debug_d3dformat(attachment->resource.format_desc->format),
325	attachment->pow2Width, attachment->pow2Height);
326	}
327	}
328	}
329
330	static struct fbo_entry context_create_fbo_entry(struct wined3d_context context)
331	{
332	const struct wined3d_gl_info *gl_info = context->gl_info;
333	#ifdef VBOX_WITH_WDDM
334	IWineD3DDeviceImpl *device = context->device;
335	#else
336	IWineD3DDeviceImpl *device = context->swapchain->device;
337	#endif
338	struct fbo_entry *entry;
339
340	entry = HeapAlloc(GetProcessHeap(), 0, sizeof(*entry));
341	entry->render_targets = HeapAlloc(GetProcessHeap(), 0, gl_info->limits.buffers * sizeof(*entry->render_targets));
342	memcpy(entry->render_targets, device->render_targets, gl_info->limits.buffers * sizeof(*entry->render_targets));
343	entry->depth_stencil = (IWineD3DSurfaceImpl *)device->stencilBufferTarget;
344	entry->attached = FALSE;
345	entry->id = 0;
346
347	return entry;
348	}
349
350	/* GL locking is done by the caller */
351	static void context_reuse_fbo_entry(struct wined3d_context context, struct fbo_entry entry)
352	{
353	const struct wined3d_gl_info *gl_info = context->gl_info;
354	#ifdef VBOX_WITH_WDDM
355	IWineD3DDeviceImpl *device = context->device;
356	#else
357	IWineD3DDeviceImpl *device = context->swapchain->device;
358	#endif
359
360	context_bind_fbo(context, GL_FRAMEBUFFER, &entry->id);
361	context_clean_fbo_attachments(gl_info);
362
363	memcpy(entry->render_targets, device->render_targets, gl_info->limits.buffers * sizeof(*entry->render_targets));
364	entry->depth_stencil = (IWineD3DSurfaceImpl *)device->stencilBufferTarget;
365	entry->attached = FALSE;
366	}
367
368	/* GL locking is done by the caller */
369	static void context_destroy_fbo_entry(struct wined3d_context context, struct fbo_entry entry)
370	{
371	if (entry->id)
372	{
373	TRACE("Destroy FBO %d\n", entry->id);
374	context_destroy_fbo(context, &entry->id);
375	}
376	--context->fbo_entry_count;
377	list_remove(&entry->entry);
378	HeapFree(GetProcessHeap(), 0, entry->render_targets);
379	HeapFree(GetProcessHeap(), 0, entry);
380	}
381
382
383	/* GL locking is done by the caller */
384	static struct fbo_entry context_find_fbo_entry(struct wined3d_context context)
385	{
386	const struct wined3d_gl_info *gl_info = context->gl_info;
387	#ifdef VBOX_WITH_WDDM
388	IWineD3DDeviceImpl *device = context->device;
389	#else
390	IWineD3DDeviceImpl *device = context->swapchain->device;
391	#endif
392	struct fbo_entry *entry;
393
394	LIST_FOR_EACH_ENTRY(entry, &context->fbo_list, struct fbo_entry, entry)
395	{
396	if (!memcmp(entry->render_targets,
397	device->render_targets, gl_info->limits.buffers * sizeof(*entry->render_targets))
398	&& entry->depth_stencil == (IWineD3DSurfaceImpl *)device->stencilBufferTarget)
399	{
400	list_remove(&entry->entry);
401	list_add_head(&context->fbo_list, &entry->entry);
402	return entry;
403	}
404	}
405
406	if (context->fbo_entry_count < WINED3D_MAX_FBO_ENTRIES)
407	{
408	entry = context_create_fbo_entry(context);
409	list_add_head(&context->fbo_list, &entry->entry);
410	++context->fbo_entry_count;
411	}
412	else
413	{
414	entry = LIST_ENTRY(list_tail(&context->fbo_list), struct fbo_entry, entry);
415	context_reuse_fbo_entry(context, entry);
416	list_remove(&entry->entry);
417	list_add_head(&context->fbo_list, &entry->entry);
418	}
419
420	return entry;
421	}
422
423	/* GL locking is done by the caller */
424	static void context_apply_fbo_entry(struct wined3d_context context, struct fbo_entry entry)
425	{
426	const struct wined3d_gl_info *gl_info = context->gl_info;
427	#ifdef VBOX_WITH_WDDM
428	IWineD3DDeviceImpl *device = context->device;
429	#else
430	IWineD3DDeviceImpl *device = context->swapchain->device;
431	#endif
432	unsigned int i;
433
434	context_bind_fbo(context, GL_FRAMEBUFFER, &entry->id);
435
436	if (!entry->attached)
437	{
438	/* Apply render targets */
439	for (i = 0; i < gl_info->limits.buffers; ++i)
440	{
441	IWineD3DSurfaceImpl render_target = (IWineD3DSurfaceImpl )device->render_targets[i];
442	context_attach_surface_fbo(context, GL_FRAMEBUFFER, i, render_target);
443	}
444
445	/* Apply depth targets */
446	if (device->stencilBufferTarget)
447	{
448	unsigned int w = ((IWineD3DSurfaceImpl *)device->render_targets[0])->pow2Width;
449	unsigned int h = ((IWineD3DSurfaceImpl *)device->render_targets[0])->pow2Height;
450
451	surface_set_compatible_renderbuffer(device->stencilBufferTarget, w, h);
452	}
453	context_attach_depth_stencil_fbo(context, GL_FRAMEBUFFER, (IWineD3DSurfaceImpl *)device->stencilBufferTarget, TRUE);
454
455	entry->attached = TRUE;
456	}
457	else
458	{
459	for (i = 0; i < gl_info->limits.buffers; ++i)
460	{
461	if (device->render_targets[i])
462	context_apply_attachment_filter_states((IWineD3DSurfaceImpl *)device->render_targets[i]);
463	}
464	if (device->stencilBufferTarget)
465	context_apply_attachment_filter_states((IWineD3DSurfaceImpl *)device->stencilBufferTarget);
466	}
467
468	for (i = 0; i < gl_info->limits.buffers; ++i)
469	{
470	if (device->render_targets[i])
471	device->draw_buffers[i] = GL_COLOR_ATTACHMENT0 + i;
472	else
473	device->draw_buffers[i] = GL_NONE;
474	}
475	}
476
477	/* GL locking is done by the caller */
478	static void context_apply_fbo_state(struct wined3d_context *context)
479	{
480	struct fbo_entry entry, entry2;
481
482	LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_destroy_list, struct fbo_entry, entry)
483	{
484	context_destroy_fbo_entry(context, entry);
485	}
486
487	if (context->rebind_fbo)
488	{
489	context_bind_fbo(context, GL_FRAMEBUFFER, NULL);
490	context->rebind_fbo = FALSE;
491	}
492
493	if (context->render_offscreen)
494	{
495	context->current_fbo = context_find_fbo_entry(context);
496	context_apply_fbo_entry(context, context->current_fbo);
497	} else {
498	context->current_fbo = NULL;
499	context_bind_fbo(context, GL_FRAMEBUFFER, NULL);
500	}
501
502	#if defined(DEBUG) && !defined(DEBUG_misha)
503	context_check_fbo_status(context);
504	#endif
505	}
506
507	/* Context activation is done by the caller. */
508	void context_alloc_occlusion_query(struct wined3d_context context, struct wined3d_occlusion_query query)
509	{
510	const struct wined3d_gl_info *gl_info = context->gl_info;
511
512	if (context->free_occlusion_query_count)
513	{
514	query->id = context->free_occlusion_queries[--context->free_occlusion_query_count];
515	}
516	else
517	{
518	if (gl_info->supported[ARB_OCCLUSION_QUERY])
519	{
520	ENTER_GL();
521	GL_EXTCALL(glGenQueriesARB(1, &query->id));
522	checkGLcall("glGenQueriesARB");
523	LEAVE_GL();
524
525	TRACE("Allocated occlusion query %u in context %p.\n", query->id, context);
526	}
527	else
528	{
529	WARN("Occlusion queries not supported, not allocating query id.\n");
530	query->id = 0;
531	}
532	}
533
534	query->context = context;
535	list_add_head(&context->occlusion_queries, &query->entry);
536	}
537
538	void context_free_occlusion_query(struct wined3d_occlusion_query *query)
539	{
540	struct wined3d_context *context = query->context;
541
542	list_remove(&query->entry);
543	query->context = NULL;
544
545	if (context->free_occlusion_query_count >= context->free_occlusion_query_size - 1)
546	{
547	UINT new_size = context->free_occlusion_query_size << 1;
548	GLuint *new_data = HeapReAlloc(GetProcessHeap(), 0, context->free_occlusion_queries,
549	new_size * sizeof(*context->free_occlusion_queries));
550
551	if (!new_data)
552	{
553	ERR("Failed to grow free list, leaking query %u in context %p.\n", query->id, context);
554	return;
555	}
556
557	context->free_occlusion_query_size = new_size;
558	context->free_occlusion_queries = new_data;
559	}
560
561	context->free_occlusion_queries[context->free_occlusion_query_count++] = query->id;
562	}
563
564	/* Context activation is done by the caller. */
565	void context_alloc_event_query(struct wined3d_context context, struct wined3d_event_query query)
566	{
567	const struct wined3d_gl_info *gl_info = context->gl_info;
568
569	if (context->free_event_query_count)
570	{
571	query->object = context->free_event_queries[--context->free_event_query_count];
572	}
573	else
574	{
575	if (gl_info->supported[ARB_SYNC])
576	{
577	/* Using ARB_sync, not much to do here. */
578	query->object.sync = NULL;
579	TRACE("Allocated event query %p in context %p.\n", query->object.sync, context);
580	}
581	else if (gl_info->supported[APPLE_FENCE])
582	{
583	ENTER_GL();
584	GL_EXTCALL(glGenFencesAPPLE(1, &query->object.id));
585	checkGLcall("glGenFencesAPPLE");
586	LEAVE_GL();
587
588	TRACE("Allocated event query %u in context %p.\n", query->object.id, context);
589	}
590	else if(gl_info->supported[NV_FENCE])
591	{
592	ENTER_GL();
593	GL_EXTCALL(glGenFencesNV(1, &query->object.id));
594	checkGLcall("glGenFencesNV");
595	LEAVE_GL();
596
597	TRACE("Allocated event query %u in context %p.\n", query->object.id, context);
598	}
599	else
600	{
601	WARN("Event queries not supported, not allocating query id.\n");
602	query->object.id = 0;
603	}
604	}
605
606	query->context = context;
607	list_add_head(&context->event_queries, &query->entry);
608	}
609
610	void context_free_event_query(struct wined3d_event_query *query)
611	{
612	struct wined3d_context *context = query->context;
613
614	list_remove(&query->entry);
615	query->context = NULL;
616
617	if (context->free_event_query_count >= context->free_event_query_size - 1)
618	{
619	UINT new_size = context->free_event_query_size << 1;
620	union wined3d_gl_query_object *new_data = HeapReAlloc(GetProcessHeap(), 0, context->free_event_queries,
621	new_size * sizeof(*context->free_event_queries));
622
623	if (!new_data)
624	{
625	ERR("Failed to grow free list, leaking query %u in context %p.\n", query->object.id, context);
626	return;
627	}
628
629	context->free_event_query_size = new_size;
630	context->free_event_queries = new_data;
631	}
632
633	context->free_event_queries[context->free_event_query_count++] = query->object;
634	}
635
636	void context_resource_released(IWineD3DDevice iface, IWineD3DResource resource, WINED3DRESOURCETYPE type)
637	{
638	IWineD3DDeviceImpl This = (IWineD3DDeviceImpl )iface;
639	UINT i;
640
641	if (!This->d3d_initialized) return;
642
643	switch(type)
644	{
645	case WINED3DRTYPE_SURFACE:
646	{
647	for (i = 0; i < This->numContexts; ++i)
648	{
649	struct wined3d_context *context = This->contexts[i];
650	const struct wined3d_gl_info *gl_info = context->gl_info;
651	struct fbo_entry entry, entry2;
652
653	if (context->current_rt == (IWineD3DSurface *)resource) context->current_rt = NULL;
654
655	LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_list, struct fbo_entry, entry)
656	{
657	UINT j;
658
659	if (entry->depth_stencil == (IWineD3DSurfaceImpl *)resource)
660	{
661	list_remove(&entry->entry);
662	list_add_head(&context->fbo_destroy_list, &entry->entry);
663	continue;
664	}
665
666	for (j = 0; j < gl_info->limits.buffers; ++j)
667	{
668	if (entry->render_targets[j] == (IWineD3DSurfaceImpl *)resource)
669	{
670	list_remove(&entry->entry);
671	list_add_head(&context->fbo_destroy_list, &entry->entry);
672	break;
673	}
674	}
675	}
676	}
677
678	break;
679	}
680
681	default:
682	break;
683	}
684	}
685
686	void context_surface_update(struct wined3d_context context, IWineD3DSurfaceImpl surface)
687	{
688	const struct wined3d_gl_info *gl_info = context->gl_info;
689	struct fbo_entry *entry = context->current_fbo;
690	unsigned int i;
691
692	if (!entry \|\| context->rebind_fbo) return;
693
694	for (i = 0; i < gl_info->limits.buffers; ++i)
695	{
696	if (surface == entry->render_targets[i])
697	{
698	TRACE("Updated surface %p is bound as color attachment %u to the current FBO.\n", surface, i);
699	context->rebind_fbo = TRUE;
700	return;
701	}
702	}
703
704	if (surface == entry->depth_stencil)
705	{
706	TRACE("Updated surface %p is bound as depth attachment to the current FBO.\n", surface);
707	context->rebind_fbo = TRUE;
708	}
709	}
710
711	static BOOL context_set_pixel_format(const struct wined3d_gl_info *gl_info, HDC dc, int format)
712	{
713	int current = GetPixelFormat(dc);
714
715	if (current == format) return TRUE;
716
717	if (!current)
718	{
719	if (!SetPixelFormat(dc, format, NULL))
720	{
721	ERR("Failed to set pixel format %d on device context %p, last error %#x.\n",
722	format, dc, GetLastError());
723	return FALSE;
724	}
725	return TRUE;
726	}
727
728	/* By default WGL doesn't allow pixel format adjustments but we need it
729	* here. For this reason there's a Wine specific wglSetPixelFormat()
730	* which allows us to set the pixel format multiple times. Only use it
731	* when really needed. */
732	if (gl_info->supported[WGL_WINE_PIXEL_FORMAT_PASSTHROUGH])
733	{
734	if (!GL_EXTCALL(wglSetPixelFormatWINE(dc, format, NULL)))
735	{
736	ERR("wglSetPixelFormatWINE failed to set pixel format %d on device context %p.\n",
737	format, dc);
738	return FALSE;
739	}
740	return TRUE;
741	}
742
743	/* OpenGL doesn't allow pixel format adjustments. Print an error and
744	* continue using the old format. There's a big chance that the old
745	* format works although with a performance hit and perhaps rendering
746	* errors. */
747	ERR("Unable to set pixel format %d on device context %p. Already using format %d.\n",
748	format, dc, current);
749	return TRUE;
750	}
751
752	static void context_update_window(struct wined3d_context *context
753	#ifdef VBOX_WITH_WDDM
754	, IWineD3DSwapChainImpl *swapchain
755	#endif
756	)
757	{
758	#ifdef VBOX_WITH_WDDM
759	# ifdef DEBUG_misha
760	Assert(0);
761	# endif
762	TRACE("Updating context %p window from %p to %p.\n",
763	context, context->win_handle, swapchain->win_handle);
764	#else
765	TRACE("Updating context %p window from %p to %p.\n",
766	context, context->win_handle, context->swapchain->win_handle);
767	#endif
768
769	if (context->valid)
770	{
771	if (!ReleaseDC(context->win_handle, context->hdc))
772	{
773	ERR("Failed to release device context %p, last error %#x.\n",
774	context->hdc, GetLastError());
775	}
776	}
777	else context->valid = 1;
778
779	#ifdef VBOX_WITH_WDDM
780	context->win_handle = swapchain->win_handle;
781	context->currentSwapchain = swapchain;
782	#else
783	context->win_handle = context->swapchain->win_handle;
784	#endif
785	if (!(context->hdc = GetDC(context->win_handle)))
786	{
787	ERR("Failed to get a device context for window %p.\n", context->win_handle);
788	goto err;
789	}
790
791	if (!context_set_pixel_format(context->gl_info, context->hdc, context->pixel_format))
792	{
793	ERR("Failed to set pixel format %d on device context %p.\n",
794	context->pixel_format, context->hdc);
795	goto err;
796	}
797
798	if (!pwglMakeCurrent(context->hdc, context->glCtx))
799	{
800	ERR("Failed to make GL context %p current on device context %p, last error %#x.\n",
801	context->glCtx, context->hdc, GetLastError());
802	goto err;
803	}
804
805	return;
806
807	err:
808	context->valid = 0;
809	}
810
811	static void context_validate(struct wined3d_context *context
812	#ifdef VBOX_WITH_WDDM
813	, IWineD3DSwapChainImpl *swapchain
814	#endif
815	)
816	{
817	HWND wnd = WindowFromDC(context->hdc);
818
819	if (wnd != context->win_handle)
820	{
821	WARN("DC %p belongs to window %p instead of %p.\n",
822	context->hdc, wnd, context->win_handle);
823	context->valid = 0;
824	}
825
826	if (
827	#ifdef VBOX_WITH_WDDM
828	swapchain && context->win_handle != swapchain->win_handle
829	#else
830	context->win_handle != context->swapchain->win_handle
831	#endif
832	)
833	{
834	context_update_window(context
835	#ifdef VBOX_WITH_WDDM
836	, swapchain
837	#endif
838	);
839	}
840	}
841
842	static void context_destroy_gl_resources(struct wined3d_context *context)
843	{
844	const struct wined3d_gl_info *gl_info = context->gl_info;
845	struct wined3d_occlusion_query *occlusion_query;
846	struct wined3d_event_query *event_query;
847	struct fbo_entry entry, entry2;
848	HGLRC restore_ctx;
849	HDC restore_dc;
850	unsigned int i;
851
852	restore_ctx = pwglGetCurrentContext();
853	restore_dc = pwglGetCurrentDC();
854
855	context_validate(context
856	#ifdef VBOX_WITH_WDDM/* tmp work-around */
857	, NULL //(IWineD3DSwapChainImpl*)context->device->swapchains[context->device->NumberOfSwapChains-1]
858	#endif
859	);
860	if (context->valid && restore_ctx != context->glCtx) pwglMakeCurrent(context->hdc, context->glCtx);
861	else restore_ctx = NULL;
862
863	ENTER_GL();
864
865	LIST_FOR_EACH_ENTRY(occlusion_query, &context->occlusion_queries, struct wined3d_occlusion_query, entry)
866	{
867	if (context->valid && gl_info->supported[ARB_OCCLUSION_QUERY])
868	GL_EXTCALL(glDeleteQueriesARB(1, &occlusion_query->id));
869	occlusion_query->context = NULL;
870	}
871
872	LIST_FOR_EACH_ENTRY(event_query, &context->event_queries, struct wined3d_event_query, entry)
873	{
874	if (context->valid)
875	{
876	if (gl_info->supported[ARB_SYNC])
877	{
878	if (event_query->object.sync) GL_EXTCALL(glDeleteSync(event_query->object.sync));
879	}
880	else if (gl_info->supported[APPLE_FENCE]) GL_EXTCALL(glDeleteFencesAPPLE(1, &event_query->object.id));
881	else if (gl_info->supported[NV_FENCE]) GL_EXTCALL(glDeleteFencesNV(1, &event_query->object.id));
882	}
883	event_query->context = NULL;
884	}
885
886	LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_destroy_list, struct fbo_entry, entry)
887	{
888	if (!context->valid) entry->id = 0;
889	context_destroy_fbo_entry(context, entry);
890	}
891
892	LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_list, struct fbo_entry, entry)
893	{
894	if (!context->valid) entry->id = 0;
895	context_destroy_fbo_entry(context, entry);
896	}
897
898	if (context->valid)
899	{
900	if (context->src_fbo)
901	{
902	TRACE("Destroy src FBO %d\n", context->src_fbo);
903	context_destroy_fbo(context, &context->src_fbo);
904	}
905	if (context->dst_fbo)
906	{
907	TRACE("Destroy dst FBO %d\n", context->dst_fbo);
908	context_destroy_fbo(context, &context->dst_fbo);
909	}
910	if (context->dummy_arbfp_prog)
911	{
912	GL_EXTCALL(glDeleteProgramsARB(1, &context->dummy_arbfp_prog));
913	}
914
915	if (gl_info->supported[ARB_OCCLUSION_QUERY])
916	GL_EXTCALL(glDeleteQueriesARB(context->free_occlusion_query_count, context->free_occlusion_queries));
917
918	if (gl_info->supported[ARB_SYNC])
919	{
920	if (event_query->object.sync) GL_EXTCALL(glDeleteSync(event_query->object.sync));
921	}
922	else if (gl_info->supported[APPLE_FENCE])
923	{
924	for (i = 0; i < context->free_event_query_count; ++i)
925	{
926	GL_EXTCALL(glDeleteFencesAPPLE(1, &context->free_event_queries[i].id));
927	}
928	}
929	else if (gl_info->supported[NV_FENCE])
930	{
931	for (i = 0; i < context->free_event_query_count; ++i)
932	{
933	GL_EXTCALL(glDeleteFencesNV(1, &context->free_event_queries[i].id));
934	}
935	}
936
937	checkGLcall("context cleanup");
938	}
939
940	LEAVE_GL();
941
942	HeapFree(GetProcessHeap(), 0, context->free_occlusion_queries);
943	HeapFree(GetProcessHeap(), 0, context->free_event_queries);
944
945	if (restore_ctx)
946	{
947	if (!pwglMakeCurrent(restore_dc, restore_ctx))
948	{
949	DWORD err = GetLastError();
950	ERR("Failed to restore GL context %p on device context %p, last error %#x.\n",
951	restore_ctx, restore_dc, err);
952	}
953	}
954	else if (pwglGetCurrentContext() && !pwglMakeCurrent(NULL, NULL))
955	{
956	ERR("Failed to disable GL context.\n");
957	}
958
959	ReleaseDC(context->win_handle, context->hdc);
960
961	if (!pwglDeleteContext(context->glCtx))
962	{
963	DWORD err = GetLastError();
964	ERR("wglDeleteContext(%p) failed, last error %#x.\n", context->glCtx, err);
965	}
966	}
967
968	DWORD context_get_tls_idx(void)
969	{
970	return wined3d_context_tls_idx;
971	}
972
973	void context_set_tls_idx(DWORD idx)
974	{
975	wined3d_context_tls_idx = idx;
976	}
977
978	struct wined3d_context *context_get_current(void)
979	{
980	return TlsGetValue(wined3d_context_tls_idx);
981	}
982
983	BOOL context_set_current(struct wined3d_context *ctx)
984	{
985	struct wined3d_context *old = context_get_current();
986
987	if (old == ctx)
988	{
989	TRACE("Already using D3D context %p.\n", ctx);
990	return TRUE;
991	}
992
993	if (old)
994	{
995	if (old->destroyed)
996	{
997	TRACE("Switching away from destroyed context %p.\n", old);
998	context_destroy_gl_resources(old);
999	HeapFree(GetProcessHeap(), 0, old);
1000	}
1001	else
1002	{
1003	old->current = 0;
1004	}
1005	}
1006
1007	if (ctx)
1008	{
1009	TRACE("Switching to D3D context %p, GL context %p, device context %p.\n", ctx, ctx->glCtx, ctx->hdc);
1010	if (!pwglMakeCurrent(ctx->hdc, ctx->glCtx))
1011	{
1012	DWORD err = GetLastError();
1013	ERR("Failed to make GL context %p current on device context %p, last error %#x.\n",
1014	ctx->glCtx, ctx->hdc, err);
1015	TlsSetValue(wined3d_context_tls_idx, NULL);
1016	return FALSE;
1017	}
1018	ctx->current = 1;
1019	}
1020	else if(pwglGetCurrentContext())
1021	{
1022	TRACE("Clearing current D3D context.\n");
1023	if (!pwglMakeCurrent(NULL, NULL))
1024	{
1025	DWORD err = GetLastError();
1026	ERR("Failed to clear current GL context, last error %#x.\n", err);
1027	TlsSetValue(wined3d_context_tls_idx, NULL);
1028	return FALSE;
1029	}
1030	}
1031
1032	return TlsSetValue(wined3d_context_tls_idx, ctx);
1033	}
1034
1035	void context_release(struct wined3d_context *context)
1036	{
1037	TRACE("Releasing context %p, level %u.\n", context, context->level);
1038
1039	if (WARN_ON(d3d))
1040	{
1041	if (!context->level)
1042	WARN("Context %p is not active.\n", context);
1043	else if (context != context_get_current())
1044	WARN("Context %p is not the current context.\n", context);
1045	}
1046
1047	if (!--context->level && context->restore_ctx)
1048	{
1049	TRACE("Restoring GL context %p on device context %p.\n", context->restore_ctx, context->restore_dc);
1050	if (!pwglMakeCurrent(context->restore_dc, context->restore_ctx))
1051	{
1052	DWORD err = GetLastError();
1053	ERR("Failed to restore GL context %p on device context %p, last error %#x.\n",
1054	context->restore_ctx, context->restore_dc, err);
1055	}
1056	context->restore_ctx = NULL;
1057	context->restore_dc = NULL;
1058	}
1059	}
1060
1061	static void context_enter(struct wined3d_context *context)
1062	{
1063	TRACE("Entering context %p, level %u.\n", context, context->level + 1);
1064
1065	if (!context->level++)
1066	{
1067	const struct wined3d_context *current_context = context_get_current();
1068	HGLRC current_gl = pwglGetCurrentContext();
1069
1070	if (current_gl && (!current_context \|\| current_context->glCtx != current_gl))
1071	{
1072	TRACE("Another GL context (%p on device context %p) is already current.\n",
1073	current_gl, pwglGetCurrentDC());
1074	context->restore_ctx = current_gl;
1075	context->restore_dc = pwglGetCurrentDC();
1076	}
1077	}
1078	}
1079
1080	/*****************************************************************************
1081	* Context_MarkStateDirty
1082	*
1083	* Marks a state in a context dirty. Only one context, opposed to
1084	* IWineD3DDeviceImpl_MarkStateDirty, which marks the state dirty in all
1085	* contexts
1086	*
1087	* Params:
1088	* context: Context to mark the state dirty in
1089	* state: State to mark dirty
1090	* StateTable: Pointer to the state table in use(for state grouping)
1091	*
1092	*****************************************************************************/
1093	static void Context_MarkStateDirty(struct wined3d_context context, DWORD state, const struct StateEntry StateTable)
1094	{
1095	DWORD rep = StateTable[state].representative;
1096	DWORD idx;
1097	BYTE shift;
1098
1099	if (isStateDirty(context, rep)) return;
1100
1101	context->dirtyArray[context->numDirtyEntries++] = rep;
1102	idx = rep / (sizeof(context->isStateDirty) CHAR_BIT);
1103	shift = rep & ((sizeof(context->isStateDirty) CHAR_BIT) - 1);
1104	context->isStateDirty[idx] \|= (1 << shift);
1105	}
1106
1107	/* This function takes care of WineD3D pixel format selection. */
1108	static int WineD3D_ChoosePixelFormat(IWineD3DDeviceImpl *This, HDC hdc,
1109	const struct wined3d_format_desc color_format_desc, const struct wined3d_format_desc ds_format_desc,
1110	BOOL auxBuffers, int numSamples, BOOL findCompatible)
1111	{
1112	int iPixelFormat=0;
1113	unsigned int matchtry;
1114	short redBits, greenBits, blueBits, alphaBits, colorBits;
1115	short depthBits=0, stencilBits=0;
1116
1117	struct match_type {
1118	BOOL require_aux;
1119	BOOL exact_alpha;
1120	BOOL exact_color;
1121	} matches[] = {
1122	/* First, try without alpha match buffers. MacOS supports aux buffers only
1123	* on A8R8G8B8, and we prefer better offscreen rendering over an alpha match.
1124	* Then try without aux buffers - this is the most common cause for not
1125	* finding a pixel format. Also some drivers(the open source ones)
1126	* only offer 32 bit ARB pixel formats. First try without an exact alpha
1127	* match, then try without an exact alpha and color match.
1128	*/
1129	{ TRUE, TRUE, TRUE },
1130	{ TRUE, FALSE, TRUE },
1131	{ FALSE, TRUE, TRUE },
1132	{ FALSE, FALSE, TRUE },
1133	{ TRUE, FALSE, FALSE },
1134	{ FALSE, FALSE, FALSE },
1135	};
1136
1137	int i = 0;
1138	int nCfgs = This->adapter->nCfgs;
1139
1140	TRACE("ColorFormat=%s, DepthStencilFormat=%s, auxBuffers=%d, numSamples=%d, findCompatible=%d\n",
1141	debug_d3dformat(color_format_desc->format), debug_d3dformat(ds_format_desc->format),
1142	auxBuffers, numSamples, findCompatible);
1143
1144	if (!getColorBits(color_format_desc, &redBits, &greenBits, &blueBits, &alphaBits, &colorBits))
1145	{
1146	ERR("Unable to get color bits for format %s (%#x)!\n",
1147	debug_d3dformat(color_format_desc->format), color_format_desc->format);
1148	return 0;
1149	}
1150
1151	getDepthStencilBits(ds_format_desc, &depthBits, &stencilBits);
1152
1153	for(matchtry = 0; matchtry < (sizeof(matches) / sizeof(matches[0])) && !iPixelFormat; matchtry++) {
1154	for(i=0; i<nCfgs; i++) {
1155	BOOL exactDepthMatch = TRUE;
1156	WineD3D_PixelFormat *cfg = &This->adapter->cfgs[i];
1157
1158	/* For now only accept RGBA formats. Perhaps some day we will
1159	* allow floating point formats for pbuffers. */
1160	if(cfg->iPixelType != WGL_TYPE_RGBA_ARB)
1161	continue;
1162
1163	/* In window mode we need a window drawable format and double buffering. */
1164	if(!(cfg->windowDrawable && cfg->doubleBuffer))
1165	continue;
1166
1167	/* We like to have aux buffers in backbuffer mode */
1168	if(auxBuffers && !cfg->auxBuffers && matches[matchtry].require_aux)
1169	continue;
1170
1171	if(matches[matchtry].exact_color) {
1172	if(cfg->redSize != redBits)
1173	continue;
1174	if(cfg->greenSize != greenBits)
1175	continue;
1176	if(cfg->blueSize != blueBits)
1177	continue;
1178	} else {
1179	if(cfg->redSize < redBits)
1180	continue;
1181	if(cfg->greenSize < greenBits)
1182	continue;
1183	if(cfg->blueSize < blueBits)
1184	continue;
1185	}
1186	if(matches[matchtry].exact_alpha) {
1187	if(cfg->alphaSize != alphaBits)
1188	continue;
1189	} else {
1190	if(cfg->alphaSize < alphaBits)
1191	continue;
1192	}
1193
1194	/* We try to locate a format which matches our requirements exactly. In case of
1195	* depth it is no problem to emulate 16-bit using e.g. 24-bit, so accept that. */
1196	if(cfg->depthSize < depthBits)
1197	continue;
1198	else if(cfg->depthSize > depthBits)
1199	exactDepthMatch = FALSE;
1200
1201	/* In all cases make sure the number of stencil bits matches our requirements
1202	* even when we don't need stencil because it could affect performance EXCEPT
1203	* on cards which don't offer depth formats without stencil like the i915 drivers
1204	* on Linux. */
1205	if(stencilBits != cfg->stencilSize && !(This->adapter->brokenStencil && stencilBits <= cfg->stencilSize))
1206	continue;
1207
1208	/* Check multisampling support */
1209	if(cfg->numSamples != numSamples)
1210	continue;
1211
1212	/* When we have passed all the checks then we have found a format which matches our
1213	* requirements. Note that we only check for a limit number of capabilities right now,
1214	* so there can easily be a dozen of pixel formats which appear to be the 'same' but
1215	* can still differ in things like multisampling, stereo, SRGB and other flags.
1216	*/
1217
1218	/* Exit the loop as we have found a format :) */
1219	if(exactDepthMatch) {
1220	iPixelFormat = cfg->iPixelFormat;
1221	break;
1222	} else if(!iPixelFormat) {
1223	/* In the end we might end up with a format which doesn't exactly match our depth
1224	* requirements. Accept the first format we found because formats with higher iPixelFormat
1225	* values tend to have more extended capabilities (e.g. multisampling) which we don't need. */
1226	iPixelFormat = cfg->iPixelFormat;
1227	}
1228	}
1229	}
1230
1231	/* When findCompatible is set and no suitable format was found, let ChoosePixelFormat choose a pixel format in order not to crash. */
1232	if(!iPixelFormat && !findCompatible) {
1233	ERR("Can't find a suitable iPixelFormat\n");
1234	return FALSE;
1235	} else if(!iPixelFormat) {
1236	PIXELFORMATDESCRIPTOR pfd;
1237
1238	TRACE("Falling back to ChoosePixelFormat as we weren't able to find an exactly matching pixel format\n");
1239	/* PixelFormat selection */
1240	ZeroMemory(&pfd, sizeof(pfd));
1241	pfd.nSize = sizeof(pfd);
1242	pfd.nVersion = 1;
1243	pfd.dwFlags = PFD_SUPPORT_OPENGL \| PFD_DOUBLEBUFFER \| PFD_DRAW_TO_WINDOW;/PFD_GENERIC_ACCELERATED/
1244	pfd.iPixelType = PFD_TYPE_RGBA;
1245	pfd.cAlphaBits = alphaBits;
1246	pfd.cColorBits = colorBits;
1247	pfd.cDepthBits = depthBits;
1248	pfd.cStencilBits = stencilBits;
1249	pfd.iLayerType = PFD_MAIN_PLANE;
1250
1251	iPixelFormat = ChoosePixelFormat(hdc, &pfd);
1252	if(!iPixelFormat) {
1253	/* If this happens something is very wrong as ChoosePixelFormat barely fails */
1254	ERR("Can't find a suitable iPixelFormat\n");
1255	return FALSE;
1256	}
1257	}
1258
1259	TRACE("Found iPixelFormat=%d for ColorFormat=%s, DepthStencilFormat=%s\n",
1260	iPixelFormat, debug_d3dformat(color_format_desc->format), debug_d3dformat(ds_format_desc->format));
1261	return iPixelFormat;
1262	}
1263
1264
1265
1266
1267	/*****************************************************************************
1268	* context_create
1269	*
1270	* Creates a new context.
1271	*
1272	* * Params:
1273	* This: Device to activate the context for
1274	* target: Surface this context will render to
1275	* win_handle: handle to the window which we are drawing to
1276	* pPresentParameters: contains the pixelformats to use for onscreen rendering
1277	*
1278	*****************************************************************************/
1279	struct wined3d_context context_create(IWineD3DSwapChainImpl swapchain, IWineD3DSurfaceImpl *target,
1280	const struct wined3d_format_desc *ds_format_desc)
1281	{
1282	IWineD3DDeviceImpl *device = swapchain->device;
1283	const struct wined3d_gl_info *gl_info = &device->adapter->gl_info;
1284	const struct wined3d_format_desc *color_format_desc;
1285	struct wined3d_context *ret;
1286	PIXELFORMATDESCRIPTOR pfd;
1287	BOOL auxBuffers = FALSE;
1288	int numSamples = 0;
1289	int pixel_format;
1290	unsigned int s;
1291	DWORD state;
1292	HGLRC ctx;
1293	HDC hdc;
1294
1295	#if defined(VBOX_WITH_WDDM) && defined(DEBUG_misha)
1296	Assert(0);
1297	#endif
1298
1299	TRACE("swapchain %p, target %p, window %p.\n", swapchain, target, swapchain->win_handle);
1300
1301	ret = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*ret));
1302	if (!ret)
1303	{
1304	ERR("Failed to allocate context memory.\n");
1305	return NULL;
1306	}
1307
1308	if (!(hdc = GetDC(swapchain->win_handle)))
1309	{
1310	ERR("Failed to retrieve a device context.\n");
1311	goto out;
1312	}
1313
1314	color_format_desc = target->resource.format_desc;
1315
1316	/* In case of ORM_BACKBUFFER, make sure to request an alpha component for
1317	* X4R4G4B4/X8R8G8B8 as we might need it for the backbuffer. */
1318	if (wined3d_settings.offscreen_rendering_mode == ORM_BACKBUFFER)
1319	{
1320	auxBuffers = TRUE;
1321
1322	if (color_format_desc->format == WINED3DFMT_B4G4R4X4_UNORM)
1323	color_format_desc = getFormatDescEntry(WINED3DFMT_B4G4R4A4_UNORM, gl_info);
1324	else if (color_format_desc->format == WINED3DFMT_B8G8R8X8_UNORM)
1325	color_format_desc = getFormatDescEntry(WINED3DFMT_B8G8R8A8_UNORM, gl_info);
1326	}
1327
1328	/* DirectDraw supports 8bit paletted render targets and these are used by
1329	* old games like Starcraft and C&C. Most modern hardware doesn't support
1330	* 8bit natively so we perform some form of 8bit -> 32bit conversion. The
1331	* conversion (ab)uses the alpha component for storing the palette index.
1332	* For this reason we require a format with 8bit alpha, so request
1333	* A8R8G8B8. */
1334	if (color_format_desc->format == WINED3DFMT_P8_UINT)
1335	color_format_desc = getFormatDescEntry(WINED3DFMT_B8G8R8A8_UNORM, gl_info);
1336
1337	/* Retrieve the depth stencil format from the present parameters.
1338	* The choice of the proper format can give a nice performance boost
1339	* in case of GPU limited programs. */
1340	if (swapchain->presentParms.EnableAutoDepthStencil)
1341	{
1342	TRACE("Auto depth stencil enabled, using format %s.\n",
1343	debug_d3dformat(swapchain->presentParms.AutoDepthStencilFormat));
1344	ds_format_desc = getFormatDescEntry(swapchain->presentParms.AutoDepthStencilFormat, gl_info);
1345	}
1346
1347	/* D3D only allows multisampling when SwapEffect is set to WINED3DSWAPEFFECT_DISCARD. */
1348	if (swapchain->presentParms.MultiSampleType && (swapchain->presentParms.SwapEffect == WINED3DSWAPEFFECT_DISCARD))
1349	{
1350	if (!gl_info->supported[ARB_MULTISAMPLE])
1351	WARN("The application is requesting multisampling without support.\n");
1352	else
1353	{
1354	TRACE("Requesting multisample type %#x.\n", swapchain->presentParms.MultiSampleType);
1355	numSamples = swapchain->presentParms.MultiSampleType;
1356	}
1357	}
1358
1359	/* Try to find a pixel format which matches our requirements. */
1360	pixel_format = WineD3D_ChoosePixelFormat(device, hdc, color_format_desc, ds_format_desc,
1361	auxBuffers, numSamples, FALSE /* findCompatible */);
1362
1363	/* Try to locate a compatible format if we weren't able to find anything. */
1364	if (!pixel_format)
1365	{
1366	TRACE("Trying to locate a compatible pixel format because an exact match failed.\n");
1367	pixel_format = WineD3D_ChoosePixelFormat(device, hdc, color_format_desc, ds_format_desc,
1368	auxBuffers, 0 /* numSamples /, TRUE / findCompatible */);
1369	}
1370
1371	/* If we still don't have a pixel format, something is very wrong as ChoosePixelFormat barely fails */
1372	if (!pixel_format)
1373	{
1374	ERR("Can't find a suitable pixel format.\n");
1375	goto out;
1376	}
1377
1378	DescribePixelFormat(hdc, pixel_format, sizeof(pfd), &pfd);
1379	if (!context_set_pixel_format(gl_info, hdc, pixel_format))
1380	{
1381	ERR("Failed to set pixel format %d on device context %p.\n", pixel_format, hdc);
1382	goto out;
1383	}
1384
1385	ctx = pwglCreateContext(hdc);
1386	if (device->numContexts)
1387	{
1388	if (!pwglShareLists(device->contexts[0]->glCtx, ctx))
1389	{
1390	DWORD err = GetLastError();
1391	ERR("wglShareLists(%p, %p) failed, last error %#x.\n",
1392	device->contexts[0]->glCtx, ctx, err);
1393	}
1394	}
1395
1396	if(!ctx) {
1397	ERR("Failed to create a WGL context\n");
1398	goto out;
1399	}
1400
1401	if (!device_context_add(device, ret))
1402	{
1403	ERR("Failed to add the newly created context to the context list\n");
1404	if (!pwglDeleteContext(ctx))
1405	{
1406	DWORD err = GetLastError();
1407	ERR("wglDeleteContext(%p) failed, last error %#x.\n", ctx, err);
1408	}
1409	goto out;
1410	}
1411
1412	ret->gl_info = gl_info;
1413
1414	/* Mark all states dirty to force a proper initialization of the states
1415	* on the first use of the context. */
1416	for (state = 0; state <= STATE_HIGHEST; ++state)
1417	{
1418	if (device->StateTable[state].representative)
1419	Context_MarkStateDirty(ret, state, device->StateTable);
1420	}
1421
1422	#ifdef VBOX_WITH_WDDM
1423	ret->device = device;
1424	ret->currentSwapchain = swapchain;
1425	#else
1426	ret->swapchain = swapchain;
1427	#endif
1428	ret->current_rt = (IWineD3DSurface *)target;
1429	ret->tid = GetCurrentThreadId();
1430
1431	ret->render_offscreen = surface_is_offscreen((IWineD3DSurface *) target);
1432	ret->draw_buffer_dirty = TRUE;
1433	ret->valid = 1;
1434
1435	ret->glCtx = ctx;
1436	ret->win_handle = swapchain->win_handle;
1437	ret->hdc = hdc;
1438	ret->pixel_format = pixel_format;
1439
1440	if (device->shader_backend->shader_dirtifyable_constants((IWineD3DDevice *)device))
1441	{
1442	/* Create the dirty constants array and initialize them to dirty */
1443	ret->vshader_const_dirty = HeapAlloc(GetProcessHeap(), 0,
1444	sizeof(ret->vshader_const_dirty) device->d3d_vshader_constantF);
1445	ret->pshader_const_dirty = HeapAlloc(GetProcessHeap(), 0,
1446	sizeof(ret->pshader_const_dirty) device->d3d_pshader_constantF);
1447	memset(ret->vshader_const_dirty, 1,
1448	sizeof(ret->vshader_const_dirty) device->d3d_vshader_constantF);
1449	memset(ret->pshader_const_dirty, 1,
1450	sizeof(ret->pshader_const_dirty) device->d3d_pshader_constantF);
1451	}
1452
1453	ret->free_occlusion_query_size = 4;
1454	ret->free_occlusion_queries = HeapAlloc(GetProcessHeap(), 0,
1455	ret->free_occlusion_query_size * sizeof(*ret->free_occlusion_queries));
1456	if (!ret->free_occlusion_queries) goto out;
1457
1458	list_init(&ret->occlusion_queries);
1459
1460	ret->free_event_query_size = 4;
1461	ret->free_event_queries = HeapAlloc(GetProcessHeap(), 0,
1462	ret->free_event_query_size * sizeof(*ret->free_event_queries));
1463	if (!ret->free_event_queries) goto out;
1464
1465	list_init(&ret->event_queries);
1466
1467	TRACE("Successfully created new context %p\n", ret);
1468
1469	list_init(&ret->fbo_list);
1470	list_init(&ret->fbo_destroy_list);
1471
1472	context_enter(ret);
1473
1474	/* Set up the context defaults */
1475	if (!context_set_current(ret))
1476	{
1477	ERR("Cannot activate context to set up defaults\n");
1478	context_release(ret);
1479	goto out;
1480	}
1481
1482	ENTER_GL();
1483
1484	glGetIntegerv(GL_AUX_BUFFERS, &ret->aux_buffers);
1485
1486	TRACE("Setting up the screen\n");
1487	/* Clear the screen */
1488	glClearColor(1.0f, 0.0f, 0.0f, 0.0f);
1489	checkGLcall("glClearColor");
1490	glClearIndex(0);
1491	glClearDepth(1);
1492	glClearStencil(0xffff);
1493
1494	checkGLcall("glClear");
1495
1496	glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);
1497	checkGLcall("glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);");
1498
1499	glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);
1500	checkGLcall("glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);");
1501
1502	glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
1503	checkGLcall("glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);");
1504
1505	glPixelStorei(GL_PACK_ALIGNMENT, device->surface_alignment);
1506	checkGLcall("glPixelStorei(GL_PACK_ALIGNMENT, device->surface_alignment);");
1507	glPixelStorei(GL_UNPACK_ALIGNMENT, device->surface_alignment);
1508	checkGLcall("glPixelStorei(GL_UNPACK_ALIGNMENT, device->surface_alignment);");
1509
1510	if (gl_info->supported[APPLE_CLIENT_STORAGE])
1511	{
1512	/* Most textures will use client storage if supported. Exceptions are non-native power of 2 textures
1513	* and textures in DIB sections(due to the memory protection).
1514	*/
1515	glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE);
1516	checkGLcall("glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE)");
1517	}
1518	if (gl_info->supported[ARB_VERTEX_BLEND])
1519	{
1520	/* Direct3D always uses n-1 weights for n world matrices and uses 1 - sum for the last one
1521	* this is equal to GL_WEIGHT_SUM_UNITY_ARB. Enabling it doesn't do anything unless
1522	* GL_VERTEX_BLEND_ARB isn't enabled too
1523	*/
1524	glEnable(GL_WEIGHT_SUM_UNITY_ARB);
1525	checkGLcall("glEnable(GL_WEIGHT_SUM_UNITY_ARB)");
1526	}
1527	if (gl_info->supported[NV_TEXTURE_SHADER2])
1528	{
1529	/* Set up the previous texture input for all shader units. This applies to bump mapping, and in d3d
1530	* the previous texture where to source the offset from is always unit - 1.
1531	*/
1532	for (s = 1; s < gl_info->limits.textures; ++s)
1533	{
1534	GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + s));
1535	glTexEnvi(GL_TEXTURE_SHADER_NV, GL_PREVIOUS_TEXTURE_INPUT_NV, GL_TEXTURE0_ARB + s - 1);
1536	checkGLcall("glTexEnvi(GL_TEXTURE_SHADER_NV, GL_PREVIOUS_TEXTURE_INPUT_NV, ...");
1537	}
1538	}
1539	if (gl_info->supported[ARB_FRAGMENT_PROGRAM])
1540	{
1541	/* MacOS(radeon X1600 at least, but most likely others too) refuses to draw if GLSL and ARBFP are
1542	* enabled, but the currently bound arbfp program is 0. Enabling ARBFP with prog 0 is invalid, but
1543	* GLSL should bypass this. This causes problems in programs that never use the fixed function pipeline,
1544	* because the ARBFP extension is enabled by the ARBFP pipeline at context creation, but no program
1545	* is ever assigned.
1546	*
1547	* So make sure a program is assigned to each context. The first real ARBFP use will set a different
1548	* program and the dummy program is destroyed when the context is destroyed.
1549	*/
1550	const char *dummy_program =
1551	"!!ARBfp1.0\n"
1552	"MOV result.color, fragment.color.primary;\n"
1553	"END\n";
1554	GL_EXTCALL(glGenProgramsARB(1, &ret->dummy_arbfp_prog));
1555	GL_EXTCALL(glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, ret->dummy_arbfp_prog));
1556	GL_EXTCALL(glProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB, strlen(dummy_program), dummy_program));
1557	}
1558
1559	for (s = 0; s < gl_info->limits.point_sprite_units; ++s)
1560	{
1561	GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + s));
1562	glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE);
1563	checkGLcall("glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE)");
1564	}
1565
1566	if (gl_info->supported[ARB_PROVOKING_VERTEX])
1567	{
1568	GL_EXTCALL(glProvokingVertex(GL_FIRST_VERTEX_CONVENTION));
1569	}
1570	else if (gl_info->supported[EXT_PROVOKING_VERTEX])
1571	{
1572	GL_EXTCALL(glProvokingVertexEXT(GL_FIRST_VERTEX_CONVENTION_EXT));
1573	}
1574
1575	#ifdef VBOX_WITH_WDDM
1576	GL_EXTCALL(glChromiumParameteriCR(GL_SHARE_CONTEXT_RESOURCES_CR, GL_TRUE));
1577	#endif
1578
1579	LEAVE_GL();
1580
1581	device->frag_pipe->enable_extension((IWineD3DDevice *)device, TRUE);
1582
1583	TRACE("Created context %p.\n", ret);
1584
1585	return ret;
1586
1587	out:
1588	HeapFree(GetProcessHeap(), 0, ret->free_event_queries);
1589	HeapFree(GetProcessHeap(), 0, ret->free_occlusion_queries);
1590	HeapFree(GetProcessHeap(), 0, ret->pshader_const_dirty);
1591	HeapFree(GetProcessHeap(), 0, ret->vshader_const_dirty);
1592	HeapFree(GetProcessHeap(), 0, ret);
1593	return NULL;
1594	}
1595
1596	#ifdef VBOX_WITH_WDDM
1597	static void context_setup_target(IWineD3DDeviceImpl device, struct wined3d_context context, IWineD3DSurface *target);
1598	static void context_apply_state(struct wined3d_context context, IWineD3DDeviceImpl device, enum ContextUsage usage);
1599
1600	BOOL context_acquire_context(struct wined3d_context * context, IWineD3DSurface *target, enum ContextUsage usage, BOOL bReValidate)
1601	{
1602	IWineD3DDeviceImpl *device = context->device;
1603	struct wined3d_context *current_context = context_get_current();
1604	if (bReValidate)
1605	{
1606	IWineD3DSwapChain *swapchain = NULL;
1607	if (target && SUCCEEDED(IWineD3DSurface_GetContainer(target, &IID_IWineD3DSwapChain, (void **)&swapchain))) {
1608	context_validate(current_context, (IWineD3DSwapChainImpl*)swapchain);
1609	IWineD3DSwapChain_Release(swapchain);
1610	}
1611	else {
1612	/* tmp work-around */
1613	context_validate(current_context,
1614	NULL //(IWineD3DSwapChainImpl*)current_context->device->swapchains[current_context->device->NumberOfSwapChains-1]
1615	);
1616	}
1617	}
1618	context_setup_target(device, context, target);
1619	context_enter(context);
1620	Assert(context->valid);
1621	if (!context->valid) return FALSE;
1622
1623	if (context != current_context)
1624	{
1625	if (!context_set_current(context)) ERR("Failed to activate the new context.\n");
1626	else device->frag_pipe->enable_extension((IWineD3DDevice *)device, !context->last_was_blit);
1627
1628	if (context->vshader_const_dirty)
1629	{
1630	memset(context->vshader_const_dirty, 1,
1631	sizeof(context->vshader_const_dirty) device->d3d_vshader_constantF);
1632	device->highest_dirty_vs_const = device->d3d_vshader_constantF;
1633	}
1634	if (context->pshader_const_dirty)
1635	{
1636	memset(context->pshader_const_dirty, 1,
1637	sizeof(context->pshader_const_dirty) device->d3d_pshader_constantF);
1638	device->highest_dirty_ps_const = device->d3d_pshader_constantF;
1639	}
1640	}
1641	else if (context->restore_ctx)
1642	{
1643	if (!pwglMakeCurrent(context->hdc, context->glCtx))
1644	{
1645	DWORD err = GetLastError();
1646	ERR("Failed to make GL context %p current on device context %p, last error %#x.\n",
1647	context->hdc, context->glCtx, err);
1648	}
1649	}
1650
1651	context_apply_state(context, device, usage);
1652
1653	return TRUE;
1654	}
1655
1656	struct wined3d_context context_find_create(IWineD3DDeviceImpl device, IWineD3DSwapChainImpl swapchain, IWineD3DSurfaceImpl target,
1657	const struct wined3d_format_desc *ds_format_desc)
1658	{
1659	UINT i;
1660	DWORD tid = GetCurrentThreadId();
1661	struct wined3d_context *context = NULL;
1662
1663	#ifdef DEBUG_misha
1664	Assert(0);
1665	#endif
1666
1667	for(i = 0 ; i < device->numContexts ; i ++)
1668	{
1669	if(device->contexts[i]->tid == tid) {
1670	context = device->contexts[i];
1671	break;
1672	}
1673	}
1674
1675	if (!context)
1676	{
1677	Assert(!device->NumberOfSwapChains);
1678	context = context_create(swapchain, target, ds_format_desc);
1679	}
1680	else
1681	{
1682	if(!context_acquire_context(context, (IWineD3DSurface*)target, CTXUSAGE_RESOURCELOAD, TRUE))
1683	{
1684	ERR("Failed to acquire the context.\n");
1685	Assert(0);
1686	Assert(!context->valid);
1687	context = NULL;
1688	}
1689	else
1690	{
1691	Assert(context->valid);
1692	}
1693	}
1694
1695	return context;
1696	}
1697	#endif
1698
1699	/*****************************************************************************
1700	* context_destroy
1701	*
1702	* Destroys a wined3d context
1703	*
1704	* Params:
1705	* This: Device to activate the context for
1706	* context: Context to destroy
1707	*
1708	*****************************************************************************/
1709	void context_destroy(IWineD3DDeviceImpl This, struct wined3d_context context)
1710	{
1711	BOOL destroy;
1712
1713	TRACE("Destroying ctx %p\n", context);
1714
1715	if (context->tid == GetCurrentThreadId() \|\| !context->current)
1716	{
1717	context_destroy_gl_resources(context);
1718	TlsSetValue(wined3d_context_tls_idx, NULL);
1719	destroy = TRUE;
1720	}
1721	else
1722	{
1723	context->destroyed = 1;
1724	destroy = FALSE;
1725	}
1726
1727	HeapFree(GetProcessHeap(), 0, context->vshader_const_dirty);
1728	HeapFree(GetProcessHeap(), 0, context->pshader_const_dirty);
1729	device_context_remove(This, context);
1730	if (destroy) HeapFree(GetProcessHeap(), 0, context);
1731	}
1732
1733	/* GL locking is done by the caller */
1734	static inline void set_blit_dimension(UINT width, UINT height) {
1735	glMatrixMode(GL_PROJECTION);
1736	checkGLcall("glMatrixMode(GL_PROJECTION)");
1737	glLoadIdentity();
1738	checkGLcall("glLoadIdentity()");
1739	glOrtho(0, width, height, 0, 0.0, -1.0);
1740	checkGLcall("glOrtho");
1741	glViewport(0, 0, width, height);
1742	checkGLcall("glViewport");
1743	}
1744
1745	/*****************************************************************************
1746	* SetupForBlit
1747	*
1748	* Sets up a context for DirectDraw blitting.
1749	* All texture units are disabled, texture unit 0 is set as current unit
1750	* fog, lighting, blending, alpha test, z test, scissor test, culling disabled
1751	* color writing enabled for all channels
1752	* register combiners disabled, shaders disabled
1753	* world matrix is set to identity, texture matrix 0 too
1754	* projection matrix is setup for drawing screen coordinates
1755	*
1756	* Params:
1757	* This: Device to activate the context for
1758	* context: Context to setup
1759	*
1760	*****************************************************************************/
1761	/* Context activation is done by the caller. */
1762	static void SetupForBlit(IWineD3DDeviceImpl This, struct wined3d_context context)
1763	{
1764	int i;
1765	const struct StateEntry *StateTable = This->StateTable;
1766	const struct wined3d_gl_info *gl_info = context->gl_info;
1767	UINT width = ((IWineD3DSurfaceImpl *)context->current_rt)->currentDesc.Width;
1768	UINT height = ((IWineD3DSurfaceImpl *)context->current_rt)->currentDesc.Height;
1769	DWORD sampler;
1770
1771	TRACE("Setting up context %p for blitting\n", context);
1772	if(context->last_was_blit) {
1773	if(context->blit_w != width \|\| context->blit_h != height) {
1774	ENTER_GL();
1775	set_blit_dimension(width, height);
1776	LEAVE_GL();
1777	context->blit_w = width; context->blit_h = height;
1778	/* No need to dirtify here, the states are still dirtified because they weren't
1779	* applied since the last SetupForBlit call. Otherwise last_was_blit would not
1780	* be set
1781	*/
1782	}
1783	TRACE("Context is already set up for blitting, nothing to do\n");
1784	return;
1785	}
1786	context->last_was_blit = TRUE;
1787
1788	/* TODO: Use a display list */
1789
1790	/* Disable shaders */
1791	ENTER_GL();
1792	This->shader_backend->shader_select(context, FALSE, FALSE);
1793	LEAVE_GL();
1794
1795	Context_MarkStateDirty(context, STATE_VSHADER, StateTable);
1796	Context_MarkStateDirty(context, STATE_PIXELSHADER, StateTable);
1797
1798	/* Call ENTER_GL() once for all gl calls below. In theory we should not call
1799	* helper functions in between gl calls. This function is full of Context_MarkStateDirty
1800	* which can safely be called from here, we only lock once instead locking/unlocking
1801	* after each GL call.
1802	*/
1803	ENTER_GL();
1804
1805	/* Disable all textures. The caller can then bind a texture it wants to blit
1806	* from
1807	*
1808	* The blitting code uses (for now) the fixed function pipeline, so make sure to reset all fixed
1809	* function texture unit. No need to care for higher samplers
1810	*/
1811	for (i = gl_info->limits.textures - 1; i > 0 ; --i)
1812	{
1813	sampler = This->rev_tex_unit_map[i];
1814	GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + i));
1815	checkGLcall("glActiveTextureARB");
1816
1817	if (gl_info->supported[ARB_TEXTURE_CUBE_MAP])
1818	{
1819	glDisable(GL_TEXTURE_CUBE_MAP_ARB);
1820	checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
1821	}
1822	glDisable(GL_TEXTURE_3D);
1823	checkGLcall("glDisable GL_TEXTURE_3D");
1824	if (gl_info->supported[ARB_TEXTURE_RECTANGLE])
1825	{
1826	glDisable(GL_TEXTURE_RECTANGLE_ARB);
1827	checkGLcall("glDisable GL_TEXTURE_RECTANGLE_ARB");
1828	}
1829	glDisable(GL_TEXTURE_2D);
1830	checkGLcall("glDisable GL_TEXTURE_2D");
1831
1832	glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1833	checkGLcall("glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);");
1834
1835	if (sampler != WINED3D_UNMAPPED_STAGE)
1836	{
1837	if (sampler < MAX_TEXTURES) {
1838	Context_MarkStateDirty(context, STATE_TEXTURESTAGE(sampler, WINED3DTSS_COLOROP), StateTable);
1839	}
1840	Context_MarkStateDirty(context, STATE_SAMPLER(sampler), StateTable);
1841	}
1842	}
1843	GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB));
1844	checkGLcall("glActiveTextureARB");
1845
1846	sampler = This->rev_tex_unit_map[0];
1847
1848	if (gl_info->supported[ARB_TEXTURE_CUBE_MAP])
1849	{
1850	glDisable(GL_TEXTURE_CUBE_MAP_ARB);
1851	checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
1852	}
1853	glDisable(GL_TEXTURE_3D);
1854	checkGLcall("glDisable GL_TEXTURE_3D");
1855	if (gl_info->supported[ARB_TEXTURE_RECTANGLE])
1856	{
1857	glDisable(GL_TEXTURE_RECTANGLE_ARB);
1858	checkGLcall("glDisable GL_TEXTURE_RECTANGLE_ARB");
1859	}
1860	glDisable(GL_TEXTURE_2D);
1861	checkGLcall("glDisable GL_TEXTURE_2D");
1862
1863	glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1864
1865	glMatrixMode(GL_TEXTURE);
1866	checkGLcall("glMatrixMode(GL_TEXTURE)");
1867	glLoadIdentity();
1868	checkGLcall("glLoadIdentity()");
1869
1870	if (gl_info->supported[EXT_TEXTURE_LOD_BIAS])
1871	{
1872	glTexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT,
1873	GL_TEXTURE_LOD_BIAS_EXT,
1874	0.0f);
1875	checkGLcall("glTexEnvi GL_TEXTURE_LOD_BIAS_EXT ...");
1876	}
1877
1878	if (sampler != WINED3D_UNMAPPED_STAGE)
1879	{
1880	if (sampler < MAX_TEXTURES) {
1881	Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_TEXTURE0 + sampler), StateTable);
1882	Context_MarkStateDirty(context, STATE_TEXTURESTAGE(sampler, WINED3DTSS_COLOROP), StateTable);
1883	}
1884	Context_MarkStateDirty(context, STATE_SAMPLER(sampler), StateTable);
1885	}
1886
1887	/* Other misc states */
1888	glDisable(GL_ALPHA_TEST);
1889	checkGLcall("glDisable(GL_ALPHA_TEST)");
1890	Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHATESTENABLE), StateTable);
1891	glDisable(GL_LIGHTING);
1892	checkGLcall("glDisable GL_LIGHTING");
1893	Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_LIGHTING), StateTable);
1894	glDisable(GL_DEPTH_TEST);
1895	checkGLcall("glDisable GL_DEPTH_TEST");
1896	Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ZENABLE), StateTable);
1897	glDisableWINE(GL_FOG);
1898	checkGLcall("glDisable GL_FOG");
1899	Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_FOGENABLE), StateTable);
1900	glDisable(GL_BLEND);
1901	checkGLcall("glDisable GL_BLEND");
1902	Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE), StateTable);
1903	glDisable(GL_CULL_FACE);
1904	checkGLcall("glDisable GL_CULL_FACE");
1905	Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_CULLMODE), StateTable);
1906	glDisable(GL_STENCIL_TEST);
1907	checkGLcall("glDisable GL_STENCIL_TEST");
1908	Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_STENCILENABLE), StateTable);
1909	glDisable(GL_SCISSOR_TEST);
1910	checkGLcall("glDisable GL_SCISSOR_TEST");
1911	Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SCISSORTESTENABLE), StateTable);
1912	if (gl_info->supported[ARB_POINT_SPRITE])
1913	{
1914	glDisable(GL_POINT_SPRITE_ARB);
1915	checkGLcall("glDisable GL_POINT_SPRITE_ARB");
1916	Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_POINTSPRITEENABLE), StateTable);
1917	}
1918	glColorMask(GL_TRUE, GL_TRUE,GL_TRUE,GL_TRUE);
1919	checkGLcall("glColorMask");
1920	Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_COLORWRITEENABLE), StateTable);
1921	Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_COLORWRITEENABLE1), StateTable);
1922	Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_COLORWRITEENABLE2), StateTable);
1923	Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_COLORWRITEENABLE3), StateTable);
1924	if (gl_info->supported[EXT_SECONDARY_COLOR])
1925	{
1926	glDisable(GL_COLOR_SUM_EXT);
1927	Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SPECULARENABLE), StateTable);
1928	checkGLcall("glDisable(GL_COLOR_SUM_EXT)");
1929	}
1930
1931	/* Setup transforms */
1932	glMatrixMode(GL_MODELVIEW);
1933	checkGLcall("glMatrixMode(GL_MODELVIEW)");
1934	glLoadIdentity();
1935	checkGLcall("glLoadIdentity()");
1936	Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_WORLDMATRIX(0)), StateTable);
1937
1938	context->last_was_rhw = TRUE;
1939	Context_MarkStateDirty(context, STATE_VDECL, StateTable); /* because of last_was_rhw = TRUE */
1940
1941	glDisable(GL_CLIP_PLANE0); checkGLcall("glDisable(clip plane 0)");
1942	glDisable(GL_CLIP_PLANE1); checkGLcall("glDisable(clip plane 1)");
1943	glDisable(GL_CLIP_PLANE2); checkGLcall("glDisable(clip plane 2)");
1944	glDisable(GL_CLIP_PLANE3); checkGLcall("glDisable(clip plane 3)");
1945	glDisable(GL_CLIP_PLANE4); checkGLcall("glDisable(clip plane 4)");
1946	glDisable(GL_CLIP_PLANE5); checkGLcall("glDisable(clip plane 5)");
1947	Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_CLIPPING), StateTable);
1948
1949	set_blit_dimension(width, height);
1950
1951	LEAVE_GL();
1952
1953	context->blit_w = width; context->blit_h = height;
1954	Context_MarkStateDirty(context, STATE_VIEWPORT, StateTable);
1955	Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_PROJECTION), StateTable);
1956
1957
1958	This->frag_pipe->enable_extension((IWineD3DDevice *) This, FALSE);
1959	}
1960
1961	/*****************************************************************************
1962	* findThreadContextForSwapChain
1963	*
1964	* Searches a swapchain for all contexts and picks one for the thread tid.
1965	* If none can be found the swapchain is requested to create a new context
1966	*
1967	*****************************************************************************/
1968	static struct wined3d_context findThreadContextForSwapChain(IWineD3DSwapChain swapchain, DWORD tid)
1969	{
1970	unsigned int i;
1971	#ifdef VBOX_WITH_WDDM
1972	IWineD3DDeviceImpl device = ((IWineD3DSwapChainImpl)swapchain)->device;
1973	for (i = 0; i < device->numContexts; ++i)
1974	{
1975	if (device->contexts[i]->tid == tid)
1976	return device->contexts[i];
1977	}
1978	#else
1979	for(i = 0; i < ((IWineD3DSwapChainImpl *) swapchain)->num_contexts; i++) {
1980	if(((IWineD3DSwapChainImpl *) swapchain)->context[i]->tid == tid) {
1981	return ((IWineD3DSwapChainImpl *) swapchain)->context[i];
1982	}
1983	}
1984	#endif
1985
1986	/* Create a new context for the thread */
1987	return swapchain_create_context_for_thread(swapchain);
1988	}
1989
1990	/*****************************************************************************
1991	* FindContext
1992	*
1993	* Finds a context for the current render target and thread
1994	*
1995	* Parameters:
1996	* target: Render target to find the context for
1997	* tid: Thread to activate the context for
1998	*
1999	* Returns: The needed context
2000	*
2001	*****************************************************************************/
2002	static struct wined3d_context FindContext(IWineD3DDeviceImpl This, IWineD3DSurface *target)
2003	{
2004	IWineD3DSwapChain *swapchain = NULL;
2005	struct wined3d_context *current_context = context_get_current();
2006	DWORD tid = GetCurrentThreadId();
2007	struct wined3d_context *context;
2008
2009	if (current_context && current_context->destroyed) current_context = NULL;
2010
2011	if (!target)
2012	{
2013	if (current_context
2014	&& current_context->current_rt
2015	#ifdef VBOX_WITH_WDDM
2016	&& current_context->device == This
2017	#else
2018	&& current_context->swapchain->device == This
2019	#endif
2020	)
2021	{
2022	target = current_context->current_rt;
2023	}
2024	else
2025	{
2026	#ifdef VBOX_WITH_WDDM
2027	/* tmp work-around */
2028	IWineD3DSwapChainImpl swapchain = (IWineD3DSwapChainImpl )This->swapchains[This->NumberOfSwapChains-1];
2029	#else
2030	IWineD3DSwapChainImpl swapchain = (IWineD3DSwapChainImpl )This->swapchains[0];
2031	#endif
2032	if (swapchain->backBuffer) target = swapchain->backBuffer[0];
2033	else target = swapchain->frontBuffer;
2034	}
2035	}
2036
2037	if (current_context && current_context->current_rt == target)
2038	{
2039	#ifdef VBOX_WITH_WDDM
2040	IWineD3DSwapChain *swapchain = NULL;
2041	if (SUCCEEDED(IWineD3DSurface_GetContainer(target, &IID_IWineD3DSwapChain, (void **)&swapchain))) {
2042	context_validate(current_context, (IWineD3DSwapChainImpl*)swapchain);
2043	IWineD3DSwapChain_Release(swapchain);
2044	}
2045	else {
2046	/* tmp work-around */
2047	context_validate(current_context,
2048	NULL //(IWineD3DSwapChainImpl*)current_context->device->swapchains[current_context->device->NumberOfSwapChains-1]
2049	);
2050	}
2051	#else
2052	context_validate(current_context);
2053	#endif
2054	return current_context;
2055	}
2056
2057	if (SUCCEEDED(IWineD3DSurface_GetContainer(target, &IID_IWineD3DSwapChain, (void **)&swapchain))) {
2058	TRACE("Rendering onscreen\n");
2059
2060	context = findThreadContextForSwapChain(swapchain, tid);
2061	#ifdef VBOX_WITH_WDDM
2062	context_validate(context, (IWineD3DSwapChainImpl*)swapchain);
2063	#endif
2064	IWineD3DSwapChain_Release(swapchain);
2065	}
2066	else
2067	{
2068	TRACE("Rendering offscreen\n");
2069
2070	/* Stay with the currently active context. */
2071	if (current_context
2072	#ifdef VBOX_WITH_WDDM
2073	&& current_context->device == This
2074	#else
2075	&& current_context->swapchain->device == This
2076	#endif
2077	)
2078	{
2079	context = current_context;
2080	}
2081	else
2082	{
2083	/* This may happen if the app jumps straight into offscreen rendering
2084	* Start using the context of the primary swapchain. tid == 0 is no problem
2085	* for findThreadContextForSwapChain.
2086	*
2087	* Can also happen on thread switches - in that case findThreadContextForSwapChain
2088	* is perfect to call. */
2089	#ifdef VBOX_WITH_WDDM /* tmp work-around */
2090	context = findThreadContextForSwapChain(This->swapchains[This->NumberOfSwapChains-1], tid);
2091	#else
2092	context = findThreadContextForSwapChain(This->swapchains[0], tid);
2093	#endif
2094	}
2095	#ifdef VBOX_WITH_WDDM
2096	context_validate(context,
2097	NULL //(IWineD3DSwapChainImpl)This->swapchains[This->NumberOfSwapChains-1] / tmp work-around */
2098	);
2099	#endif
2100	}
2101
2102	#ifndef VBOX_WITH_WDDM
2103	context_validate(context);
2104	#endif
2105
2106	return context;
2107	}
2108
2109	/* Context activation is done by the caller. */
2110	static void context_apply_draw_buffer(struct wined3d_context *context, BOOL blit)
2111	{
2112	const struct wined3d_gl_info *gl_info = context->gl_info;
2113	IWineD3DSurface *rt = context->current_rt;
2114	IWineD3DDeviceImpl *device;
2115
2116	device = ((IWineD3DSurfaceImpl *)rt)->resource.device;
2117	if (!surface_is_offscreen(rt))
2118	{
2119	ENTER_GL();
2120	glDrawBuffer(surface_get_gl_buffer(rt));
2121	checkGLcall("glDrawBuffers()");
2122	LEAVE_GL();
2123	}
2124	else
2125	{
2126	ENTER_GL();
2127	if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2128	{
2129	if (!blit)
2130	{
2131	if (gl_info->supported[ARB_DRAW_BUFFERS])
2132	{
2133	GL_EXTCALL(glDrawBuffersARB(gl_info->limits.buffers, device->draw_buffers));
2134	checkGLcall("glDrawBuffers()");
2135	}
2136	else
2137	{
2138	glDrawBuffer(device->draw_buffers[0]);
2139	checkGLcall("glDrawBuffer()");
2140	}
2141	} else {
2142	glDrawBuffer(GL_COLOR_ATTACHMENT0);
2143	checkGLcall("glDrawBuffer()");
2144	}
2145	}
2146	else
2147	{
2148	glDrawBuffer(device->offscreenBuffer);
2149	checkGLcall("glDrawBuffer()");
2150	}
2151	LEAVE_GL();
2152	}
2153	}
2154
2155	/* GL locking is done by the caller. */
2156	void context_set_draw_buffer(struct wined3d_context *context, GLenum buffer)
2157	{
2158	glDrawBuffer(buffer);
2159	checkGLcall("glDrawBuffer()");
2160	context->draw_buffer_dirty = TRUE;
2161	}
2162
2163	static inline void context_set_render_offscreen(struct wined3d_context context, const struct StateEntry StateTable,
2164	BOOL offscreen)
2165	{
2166	if (context->render_offscreen == offscreen) return;
2167
2168	Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_PROJECTION), StateTable);
2169	Context_MarkStateDirty(context, STATE_VDECL, StateTable);
2170	Context_MarkStateDirty(context, STATE_VIEWPORT, StateTable);
2171	Context_MarkStateDirty(context, STATE_SCISSORRECT, StateTable);
2172	Context_MarkStateDirty(context, STATE_FRONTFACE, StateTable);
2173	context->render_offscreen = offscreen;
2174	}
2175
2176	static BOOL match_depth_stencil_format(const struct wined3d_format_desc *existing,
2177	const struct wined3d_format_desc *required)
2178	{
2179	short existing_depth, existing_stencil, required_depth, required_stencil;
2180
2181	if(existing == required) return TRUE;
2182	if((existing->Flags & WINED3DFMT_FLAG_FLOAT) != (required->Flags & WINED3DFMT_FLAG_FLOAT)) return FALSE;
2183
2184	getDepthStencilBits(existing, &existing_depth, &existing_stencil);
2185	getDepthStencilBits(required, &required_depth, &required_stencil);
2186
2187	if(existing_depth < required_depth) return FALSE;
2188	/* If stencil bits are used the exact amount is required - otherwise wrapping
2189	* won't work correctly */
2190	if(required_stencil && required_stencil != existing_stencil) return FALSE;
2191	return TRUE;
2192	}
2193	/* The caller provides a context */
2194	static void context_validate_onscreen_formats(IWineD3DDeviceImpl device, struct wined3d_context context)
2195	{
2196	/* Onscreen surfaces are always in a swapchain */
2197	IWineD3DSurfaceImpl depth_stencil = (IWineD3DSurfaceImpl ) device->stencilBufferTarget;
2198	IWineD3DSwapChainImpl swapchain = (IWineD3DSwapChainImpl ) ((IWineD3DSurfaceImpl *)context->current_rt)->container;
2199
2200	if (!depth_stencil) return;
2201	if (match_depth_stencil_format(swapchain->ds_format, depth_stencil->resource.format_desc)) return;
2202
2203	/* TODO: If the requested format would satisfy the needs of the existing one(reverse match),
2204	* or no onscreen depth buffer was created, the OpenGL drawable could be changed to the new
2205	* format. */
2206	WARN("Depth stencil format is not supported by WGL, rendering the backbuffer in an FBO\n");
2207
2208	/* The currently active context is the necessary context to access the swapchain's onscreen buffers */
2209	IWineD3DSurface_LoadLocation(context->current_rt, SFLAG_INTEXTURE, NULL);
2210	swapchain->render_to_fbo = TRUE;
2211	context_set_render_offscreen(context, device->StateTable, TRUE);
2212	}
2213
2214	/* Context activation is done by the caller. */
2215	static void context_apply_state(struct wined3d_context context, IWineD3DDeviceImpl device, enum ContextUsage usage)
2216	{
2217	const struct StateEntry *state_table = device->StateTable;
2218	unsigned int i;
2219
2220	switch (usage) {
2221	case CTXUSAGE_CLEAR:
2222	case CTXUSAGE_DRAWPRIM:
2223	if (wined3d_settings.offscreen_rendering_mode == ORM_FBO) {
2224	if (!context->render_offscreen) context_validate_onscreen_formats(device, context);
2225	ENTER_GL();
2226	context_apply_fbo_state(context);
2227	LEAVE_GL();
2228	}
2229	if (context->draw_buffer_dirty) {
2230	context_apply_draw_buffer(context, FALSE);
2231	context->draw_buffer_dirty = FALSE;
2232	}
2233	break;
2234
2235	case CTXUSAGE_BLIT:
2236	if (wined3d_settings.offscreen_rendering_mode == ORM_FBO) {
2237	if (!context->render_offscreen) context_validate_onscreen_formats(device, context);
2238	if (context->render_offscreen)
2239	{
2240	FIXME("Activating for CTXUSAGE_BLIT for an offscreen target with ORM_FBO. This should be avoided.\n");
2241	surface_internal_preload(context->current_rt, SRGB_RGB);
2242
2243	ENTER_GL();
2244	context_bind_fbo(context, GL_FRAMEBUFFER, &context->dst_fbo);
2245	context_attach_surface_fbo(context, GL_FRAMEBUFFER, 0, (IWineD3DSurfaceImpl *)context->current_rt);
2246	context_attach_depth_stencil_fbo(context, GL_FRAMEBUFFER, NULL, FALSE);
2247	LEAVE_GL();
2248	} else {
2249	ENTER_GL();
2250	context_bind_fbo(context, GL_FRAMEBUFFER, NULL);
2251	LEAVE_GL();
2252	}
2253	context->draw_buffer_dirty = TRUE;
2254	}
2255	if (context->draw_buffer_dirty) {
2256	context_apply_draw_buffer(context, TRUE);
2257	if (wined3d_settings.offscreen_rendering_mode != ORM_FBO) {
2258	context->draw_buffer_dirty = FALSE;
2259	}
2260	}
2261	break;
2262
2263	default:
2264	break;
2265	}
2266
2267	switch(usage) {
2268	case CTXUSAGE_RESOURCELOAD:
2269	/* This does not require any special states to be set up */
2270	break;
2271
2272	case CTXUSAGE_CLEAR:
2273	if(context->last_was_blit) {
2274	device->frag_pipe->enable_extension((IWineD3DDevice *)device, TRUE);
2275	}
2276
2277	/* Blending and clearing should be orthogonal, but tests on the nvidia driver show that disabling
2278	* blending when clearing improves the clearing performance incredibly.
2279	*/
2280	ENTER_GL();
2281	glDisable(GL_BLEND);
2282	LEAVE_GL();
2283	Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE), state_table);
2284
2285	ENTER_GL();
2286	glEnable(GL_SCISSOR_TEST);
2287	checkGLcall("glEnable GL_SCISSOR_TEST");
2288	LEAVE_GL();
2289	context->last_was_blit = FALSE;
2290	Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SCISSORTESTENABLE), state_table);
2291	Context_MarkStateDirty(context, STATE_SCISSORRECT, state_table);
2292	break;
2293
2294	case CTXUSAGE_DRAWPRIM:
2295	/* This needs all dirty states applied */
2296	if(context->last_was_blit) {
2297	device->frag_pipe->enable_extension((IWineD3DDevice *)device, TRUE);
2298	}
2299
2300	IWineD3DDeviceImpl_FindTexUnitMap(device);
2301	device_preload_textures(device);
2302	if (isStateDirty(context, STATE_VDECL))
2303	device_update_stream_info(device, context->gl_info);
2304
2305	ENTER_GL();
2306	for (i = 0; i < context->numDirtyEntries; ++i)
2307	{
2308	DWORD rep = context->dirtyArray[i];
2309	DWORD idx = rep / (sizeof(context->isStateDirty) CHAR_BIT);
2310	BYTE shift = rep & ((sizeof(context->isStateDirty) CHAR_BIT) - 1);
2311	context->isStateDirty[idx] &= ~(1 << shift);
2312	state_table[rep].apply(rep, device->stateBlock, context);
2313	}
2314	LEAVE_GL();
2315	context->numDirtyEntries = 0; /* This makes the whole list clean */
2316	context->last_was_blit = FALSE;
2317	break;
2318
2319	case CTXUSAGE_BLIT:
2320	SetupForBlit(device, context);
2321	break;
2322
2323	default:
2324	FIXME("Unexpected context usage requested\n");
2325	}
2326	}
2327
2328	static void context_setup_target(IWineD3DDeviceImpl device, struct wined3d_context context, IWineD3DSurface *target)
2329	{
2330	BOOL old_render_offscreen = context->render_offscreen, render_offscreen;
2331	const struct StateEntry *StateTable = device->StateTable;
2332
2333	if (!target) return;
2334	else if (context->current_rt == target) return;
2335	render_offscreen = surface_is_offscreen(target);
2336
2337	context_set_render_offscreen(context, StateTable, render_offscreen);
2338
2339	/* To compensate the lack of format switching with some offscreen rendering methods and on onscreen buffers
2340	* the alpha blend state changes with different render target formats. */
2341	if (!context->current_rt)
2342	{
2343	Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE), StateTable);
2344	}
2345	else
2346	{
2347	const struct wined3d_format_desc old = ((IWineD3DSurfaceImpl )context->current_rt)->resource.format_desc;
2348	const struct wined3d_format_desc new = ((IWineD3DSurfaceImpl )target)->resource.format_desc;
2349
2350	if (old->format != new->format)
2351	{
2352	/* Disable blending when the alpha mask has changed and when a format doesn't support blending. */
2353	if ((old->alpha_mask && !new->alpha_mask) \|\| (!old->alpha_mask && new->alpha_mask)
2354	\|\| !(new->Flags & WINED3DFMT_FLAG_POSTPIXELSHADER_BLENDING))
2355	{
2356	Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE), StateTable);
2357	}
2358	}
2359
2360	/* When switching away from an offscreen render target, and we're not
2361	* using FBOs, we have to read the drawable into the texture. This is
2362	* done via PreLoad (and SFLAG_INDRAWABLE set on the surface). There
2363	* are some things that need care though. PreLoad needs a GL context,
2364	* and FindContext is called before the context is activated. It also
2365	* has to be called with the old rendertarget active, otherwise a
2366	* wrong drawable is read. */
2367	if (wined3d_settings.offscreen_rendering_mode != ORM_FBO
2368	&& old_render_offscreen && context->current_rt != target)
2369	{
2370	BOOL oldInDraw = device->isInDraw;
2371
2372	/* surface_internal_preload() requires a context to load the
2373	* texture, so it will call context_acquire(). Set isInDraw to true
2374	* to signal surface_internal_preload() that it has a context. */
2375
2376	/* FIXME: This is just broken. There's no guarantee whatsoever
2377	* that the currently active context, if any, is appropriate for
2378	* reading back the render target. We should probably call
2379	* context_set_current(context) here and then rely on
2380	* context_acquire() doing the right thing. */
2381	device->isInDraw = TRUE;
2382
2383	/* Read the back buffer of the old drawable into the destination texture. */
2384	if (((IWineD3DSurfaceImpl *)context->current_rt)->texture_name_srgb)
2385	{
2386	surface_internal_preload(context->current_rt, SRGB_BOTH);
2387	}
2388	else
2389	{
2390	surface_internal_preload(context->current_rt, SRGB_RGB);
2391	}
2392
2393	IWineD3DSurface_ModifyLocation(context->current_rt, SFLAG_INDRAWABLE, FALSE);
2394
2395	device->isInDraw = oldInDraw;
2396	}
2397	}
2398
2399	context->draw_buffer_dirty = TRUE;
2400	context->current_rt = target;
2401	}
2402
2403	/*****************************************************************************
2404	* context_acquire
2405	*
2406	* Finds a rendering context and drawable matching the device and render
2407	* target for the current thread, activates them and puts them into the
2408	* requested state.
2409	*
2410	* Params:
2411	* This: Device to activate the context for
2412	* target: Requested render target
2413	* usage: Prepares the context for blitting, drawing or other actions
2414	*
2415	*****************************************************************************/
2416	struct wined3d_context context_acquire(IWineD3DDeviceImpl device, IWineD3DSurface *target, enum ContextUsage usage)
2417	{
2418	struct wined3d_context *current_context = context_get_current();
2419	struct wined3d_context *context;
2420
2421	TRACE("device %p, target %p, usage %#x.\n", device, target, usage);
2422
2423	context = FindContext(device, target);
2424	context_setup_target(device, context, target);
2425	context_enter(context);
2426	if (!context->valid) return context;
2427
2428	if (context != current_context)
2429	{
2430	if (!context_set_current(context)) ERR("Failed to activate the new context.\n");
2431	else device->frag_pipe->enable_extension((IWineD3DDevice *)device, !context->last_was_blit);
2432
2433	if (context->vshader_const_dirty)
2434	{
2435	memset(context->vshader_const_dirty, 1,
2436	sizeof(context->vshader_const_dirty) device->d3d_vshader_constantF);
2437	device->highest_dirty_vs_const = device->d3d_vshader_constantF;
2438	}
2439	if (context->pshader_const_dirty)
2440	{
2441	memset(context->pshader_const_dirty, 1,
2442	sizeof(context->pshader_const_dirty) device->d3d_pshader_constantF);
2443	device->highest_dirty_ps_const = device->d3d_pshader_constantF;
2444	}
2445	}
2446	else if (context->restore_ctx)
2447	{
2448	if (!pwglMakeCurrent(context->hdc, context->glCtx))
2449	{
2450	DWORD err = GetLastError();
2451	ERR("Failed to make GL context %p current on device context %p, last error %#x.\n",
2452	context->hdc, context->glCtx, err);
2453	}
2454	}
2455
2456	context_apply_state(context, device, usage);
2457
2458	return context;
2459	}

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source: vbox/trunk/src/VBox/Additions/WINNT/Graphics/Wine/wined3d/context.c@ 32651

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