state_bufferobject.c@ 23123

Last change on this file since 23123 was 23123, checked in by vboxsync, 15 years ago
crOpenGL: snapshots support for VBOs
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File size: 28.2 KB

Line
1	/* Copyright (c) 2001, Stanford University
2	* All rights reserved
3	*
4	* See the file LICENSE.txt for information on redistributing this software.
5	*/
6
7	#include "state.h"
8	#include "state/cr_statetypes.h"
9	#include "state/cr_statefuncs.h"
10	#include "state_internals.h"
11	#include "cr_mem.h"
12	#include "cr_string.h"
13
14
15	static CRBufferObject *AllocBufferObject(GLuint name)
16	{
17	CRBufferObject *b = crCalloc(sizeof(CRBufferObject));
18	if (b) {
19	b->refCount = 1;
20	b->name = name;
21	b->usage = GL_STATIC_DRAW_ARB;
22	b->access = GL_READ_WRITE_ARB;
23	}
24	return b;
25	}
26
27
28	void crStateBufferObjectInit (CRContext *ctx)
29	{
30	CRStateBits *sb = GetCurrentBits();
31	CRBufferObjectBits *bb = &sb->bufferobject;
32	CRBufferObjectState *b = &ctx->bufferobject;
33
34	RESET(bb->dirty, ctx->bitid);
35	RESET(bb->arrayBinding, ctx->bitid);
36	RESET(bb->elementsBinding, ctx->bitid);
37
38	#ifdef IN_GUEST
39	b->retainBufferData = GL_TRUE;
40	#else
41	b->retainBufferData = GL_FALSE;
42	#endif
43
44	b->nullBuffer = AllocBufferObject(0);
45	b->arrayBuffer = b->nullBuffer;
46	b->elementsBuffer = b->nullBuffer;
47	b->nullBuffer->refCount = 3;
48
49	b->buffers = crAllocHashtable();
50
51	b->bResyncNeeded = GL_FALSE;
52	}
53
54
55	static void crStateFreeBufferObject(void *data)
56	{
57	CRBufferObject pObj = (CRBufferObject )data;
58	if (pObj->data) crFree(pObj->data);
59
60	#ifndef IN_GUEST
61	if (diff_api.DeleteBuffersARB)
62	{
63	diff_api.DeleteBuffersARB(1, &pObj->name);
64	}
65	#endif
66
67	crFree(pObj);
68	}
69
70	void crStateBufferObjectDestroy (CRContext *ctx)
71	{
72	CRBufferObjectState *b = &ctx->bufferobject;
73	crFreeHashtable(b->buffers, crStateFreeBufferObject);
74	crFree(b->nullBuffer);
75	}
76
77	void STATE_APIENTRY
78	crStateBindBufferARB (GLenum target, GLuint buffer)
79	{
80	CRContext *g = GetCurrentContext();
81	CRBufferObjectState *b = &(g->bufferobject);
82	CRStateBits *sb = GetCurrentBits();
83	CRBufferObjectBits *bb = &(sb->bufferobject);
84	CRBufferObject oldObj, newObj;
85
86	if (g->current.inBeginEnd) {
87	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
88	"glBindBufferARB called in begin/end");
89	return;
90	}
91
92	FLUSH();
93
94	if (target == GL_ARRAY_BUFFER_ARB) {
95	oldObj = b->arrayBuffer;
96	}
97	else if (target == GL_ELEMENT_ARRAY_BUFFER_ARB) {
98	oldObj = b->elementsBuffer;
99	}
100	else {
101	crStateError(__LINE__, __FILE__, GL_INVALID_ENUM,
102	"glBindBufferARB(target)");
103	return;
104	}
105
106	if (buffer == 0) {
107	newObj = b->nullBuffer;
108	}
109	else {
110	newObj = (CRBufferObject *) crHashtableSearch(b->buffers, buffer);
111	if (!newObj) {
112	newObj = AllocBufferObject(buffer);
113	if (!newObj) {
114	crStateError(__LINE__, __FILE__, GL_OUT_OF_MEMORY, "glBindBuffer");
115	return;
116	}
117	crHashtableAdd( b->buffers, buffer, newObj );
118	}
119	}
120
121	newObj->refCount++;
122	oldObj->refCount--;
123
124	if (target == GL_ARRAY_BUFFER_ARB) {
125	b->arrayBuffer = newObj;
126	DIRTY(bb->dirty, g->neg_bitid);
127	DIRTY(bb->arrayBinding, g->neg_bitid);
128	}
129	else {
130	CRASSERT(target == GL_ELEMENT_ARRAY_BUFFER_ARB);
131	b->elementsBuffer = newObj;
132	DIRTY(bb->dirty, g->neg_bitid);
133	DIRTY(bb->elementsBinding, g->neg_bitid);
134	}
135
136	if (oldObj->refCount <= 0) {
137	/we shouldn't reach this point/
138	CRASSERT(false);
139	crHashtableDelete(b->buffers, (unsigned long) oldObj->name, crStateFreeBufferObject);
140	}
141	}
142
143	void STATE_APIENTRY
144	crStateDeleteBuffersARB(GLsizei n, const GLuint *buffers)
145	{
146	CRContext *g = GetCurrentContext();
147	CRBufferObjectState *b = &(g->bufferobject);
148	CRStateBits *sb = GetCurrentBits();
149	CRBufferObjectBits *bb = &(sb->bufferobject);
150	int i;
151
152	FLUSH();
153
154	if (g->current.inBeginEnd) {
155	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
156	"glDeleteBuffersARB called in Begin/End");
157	return;
158	}
159
160	if (n < 0) {
161	crStateError(__LINE__, __FILE__, GL_INVALID_VALUE,
162	"glDeleteBuffersARB(n < 0)");
163	return;
164	}
165
166	for (i = 0; i < n; i++) {
167	if (buffers[i]) {
168	CRBufferObject obj = (CRBufferObject )
169	crHashtableSearch(b->buffers, buffers[i]);
170	if (obj) {
171	if (obj == b->arrayBuffer) {
172	b->arrayBuffer = b->nullBuffer;
173	b->arrayBuffer->refCount++;
174	DIRTY(bb->dirty, g->neg_bitid);
175	DIRTY(bb->arrayBinding, g->neg_bitid);
176	}
177	if (obj == b->elementsBuffer) {
178	b->elementsBuffer = b->nullBuffer;
179	b->elementsBuffer->refCount++;
180	DIRTY(bb->dirty, g->neg_bitid);
181	DIRTY(bb->elementsBinding, g->neg_bitid);
182	}
183	/* @todo check bindings with the vertex arrays */
184
185	crHashtableDelete(b->buffers, buffers[i], crStateFreeBufferObject);
186	}
187	}
188	}
189	}
190
191
192	void STATE_APIENTRY
193	crStateGenBuffersARB(GLsizei n, GLuint * buffers)
194	{
195	CRContext *g = GetCurrentContext();
196	CRBufferObjectState *b = &(g->bufferobject);
197	GLint start;
198
199	FLUSH();
200
201	if (g->current.inBeginEnd) {
202	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
203	"glGenBuffersARB called in Begin/End");
204	return;
205	}
206
207	if (n < 0) {
208	crStateError(__LINE__, __FILE__, GL_INVALID_VALUE,
209	"glGenBuffersARB(n < 0)");
210	return;
211	}
212
213	start = crHashtableAllocKeys(b->buffers, n);
214	if (start) {
215	GLint i;
216	for (i = 0; i < n; i++)
217	buffers[i] = (GLuint) (start + i);
218	}
219	else {
220	crStateError(__LINE__, __FILE__, GL_OUT_OF_MEMORY, "glGenBuffersARB");
221	}
222	}
223
224
225	GLboolean STATE_APIENTRY
226	crStateIsBufferARB(GLuint buffer)
227	{
228	CRContext *g = GetCurrentContext();
229	CRBufferObjectState *b = &g->bufferobject;
230
231	FLUSH();
232
233	if (g->current.inBeginEnd) {
234	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
235	"glIsBufferARB called in begin/end");
236	return GL_FALSE;
237	}
238
239	if (buffer && crHashtableSearch(b->buffers, buffer))
240	return GL_TRUE;
241	else
242	return GL_FALSE;
243	}
244
245
246	void STATE_APIENTRY
247	crStateBufferDataARB(GLenum target, GLsizeiptrARB size, const GLvoid * data, GLenum usage)
248	{
249	CRContext *g = GetCurrentContext();
250	CRBufferObjectState *b = &g->bufferobject;
251	CRBufferObject *obj;
252	CRStateBits *sb = GetCurrentBits();
253	CRBufferObjectBits *bb = &sb->bufferobject;
254
255	FLUSH();
256
257	if (g->current.inBeginEnd) {
258	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
259	"glBufferDataARB called in begin/end");
260	return;
261	}
262
263	if (size < 0) {
264	crStateError(__LINE__, __FILE__, GL_INVALID_VALUE,
265	"glBufferDataARB(size < 0)");
266	return;
267	}
268
269	switch (usage) {
270	case GL_STREAM_DRAW_ARB:
271	case GL_STREAM_READ_ARB:
272	case GL_STREAM_COPY_ARB:
273	case GL_STATIC_DRAW_ARB:
274	case GL_STATIC_READ_ARB:
275	case GL_STATIC_COPY_ARB:
276	case GL_DYNAMIC_DRAW_ARB:
277	case GL_DYNAMIC_READ_ARB:
278	case GL_DYNAMIC_COPY_ARB:
279	/* OK */
280	break;
281	default:
282	crStateError(__LINE__, __FILE__, GL_INVALID_ENUM,
283	"glBufferDataARB(usage)");
284	return;
285	}
286
287	if (target == GL_ARRAY_BUFFER_ARB) {
288	obj = b->arrayBuffer;
289	}
290	else if (target == GL_ELEMENT_ARRAY_BUFFER_ARB) {
291	obj = b->elementsBuffer;
292	}
293	else {
294	crStateError(__LINE__, __FILE__, GL_INVALID_ENUM,
295	"glBufferDataARB(target)");
296	return;
297	}
298
299	if (obj->name == 0) {
300	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION, "glBufferDataARB");
301	return;
302	}
303
304	if (obj->pointer) {
305	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
306	"glBufferDataARB(buffer is mapped)");
307	return;
308	}
309
310	obj->usage = usage;
311	obj->size = size;
312
313	/* The user of the state tracker should set the retainBufferData field
314	* during context initialization, if needed.
315	*/
316	if (b->retainBufferData) {
317	if (obj->data) {
318	crFree(obj->data);
319	}
320
321	obj->data = crAlloc(size);
322	if (!obj->data) {
323	crStateError(__LINE__, __FILE__, GL_OUT_OF_MEMORY, "glBufferDataARB");
324	return;
325	}
326	if (data)
327	crMemcpy(obj->data, data, size);
328	}
329
330	DIRTY(bb->dirty, g->neg_bitid);
331	DIRTY(obj->dirty, g->neg_bitid);
332	obj->dirtyStart = 0;
333	obj->dirtyLength = size;
334	}
335
336
337	void STATE_APIENTRY
338	crStateBufferSubDataARB(GLenum target, GLintptrARB offset, GLsizeiptrARB size, const GLvoid * data)
339	{
340	CRContext *g = GetCurrentContext();
341	CRBufferObjectState *b = &g->bufferobject;
342	CRBufferObject *obj;
343	CRStateBits *sb = GetCurrentBits();
344	CRBufferObjectBits *bb = &sb->bufferobject;
345
346	FLUSH();
347
348	if (g->current.inBeginEnd) {
349	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
350	"glBufferSubDataARB called in begin/end");
351	return;
352	}
353
354	if (target == GL_ARRAY_BUFFER_ARB) {
355	obj = b->arrayBuffer;
356	}
357	else if (target == GL_ELEMENT_ARRAY_BUFFER_ARB) {
358	obj = b->elementsBuffer;
359	}
360	else {
361	crStateError(__LINE__, __FILE__, GL_INVALID_ENUM,
362	"glBufferSubDataARB(target)");
363	return;
364	}
365
366	if (obj->name == 0) {
367	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
368	"glBufferSubDataARB");
369	return;
370	}
371
372	if (obj->pointer) {
373	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
374	"glBufferSubDataARB(buffer is mapped)");
375	return;
376	}
377
378	if (size < 0 \|\| offset < 0 \|\| (unsigned int)offset + size > obj->size) {
379	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
380	"glBufferSubDataARB(bad offset and/or size)");
381	return;
382	}
383
384	if (b->retainBufferData && obj->data) {
385	crMemcpy((char *) obj->data + offset, data, size);
386	}
387
388	DIRTY(bb->dirty, g->neg_bitid);
389	DIRTY(obj->dirty, g->neg_bitid);
390	/* grow dirty region */
391	if (offset + size > obj->dirtyStart + obj->dirtyLength)
392	obj->dirtyLength = offset + size;
393	if (offset < obj->dirtyStart)
394	obj->dirtyStart = offset;
395	}
396
397
398	void STATE_APIENTRY
399	crStateGetBufferSubDataARB(GLenum target, GLintptrARB offset, GLsizeiptrARB size, void * data)
400	{
401	CRContext *g = GetCurrentContext();
402	CRBufferObjectState *b = &g->bufferobject;
403	CRBufferObject *obj;
404
405	FLUSH();
406
407	if (g->current.inBeginEnd) {
408	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
409	"glGetBufferSubDataARB called in begin/end");
410	return;
411	}
412
413	if (target == GL_ARRAY_BUFFER_ARB) {
414	obj = b->arrayBuffer;
415	}
416	else if (target == GL_ELEMENT_ARRAY_BUFFER_ARB) {
417	obj = b->elementsBuffer;
418	}
419	else {
420	crStateError(__LINE__, __FILE__, GL_INVALID_ENUM,
421	"glGetBufferSubDataARB(target)");
422	return;
423	}
424
425	if (obj->name == 0) {
426	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
427	"glGetBufferSubDataARB");
428	return;
429	}
430
431	if (obj->pointer) {
432	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
433	"glGetBufferSubDataARB(buffer is mapped)");
434	return;
435	}
436
437	if (size < 0 \|\| offset < 0 \|\| (unsigned int)offset + size > obj->size) {
438	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
439	"glGetBufferSubDataARB(bad offset and/or size)");
440	return;
441	}
442
443	if (b->retainBufferData && obj->data) {
444	crMemcpy(data, (char *) obj->data + offset, size);
445	}
446	}
447
448
449	void * STATE_APIENTRY
450	crStateMapBufferARB(GLenum target, GLenum access)
451	{
452	CRContext *g = GetCurrentContext();
453	CRBufferObjectState *b = &g->bufferobject;
454	CRBufferObject *obj;
455
456	FLUSH();
457
458	if (g->current.inBeginEnd) {
459	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
460	"glMapBufferARB called in begin/end");
461	return NULL;
462	}
463
464	if (target == GL_ARRAY_BUFFER_ARB) {
465	obj = b->arrayBuffer;
466	}
467	else if (target == GL_ELEMENT_ARRAY_BUFFER_ARB) {
468	obj = b->elementsBuffer;
469	}
470	else {
471	crStateError(__LINE__, __FILE__, GL_INVALID_ENUM,
472	"glMapBufferARB(target)");
473	return NULL;
474	}
475
476	if (obj->name == 0) {
477	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION, "glMapBufferARB");
478	return GL_FALSE;
479	}
480
481	switch (access) {
482	case GL_READ_ONLY_ARB:
483	case GL_WRITE_ONLY_ARB:
484	case GL_READ_WRITE_ARB:
485	obj->access = access;
486	break;
487	default:
488	crStateError(__LINE__, __FILE__, GL_INVALID_ENUM,
489	"glMapBufferARB(access)");
490	return NULL;
491	}
492
493	if (b->retainBufferData && obj->data)
494	obj->pointer = obj->data;
495
496	return obj->pointer;
497	}
498
499
500	GLboolean STATE_APIENTRY
501	crStateUnmapBufferARB(GLenum target)
502	{
503	CRContext *g = GetCurrentContext();
504	CRBufferObjectState *b = &g->bufferobject;
505	CRBufferObject *obj;
506	CRStateBits *sb = GetCurrentBits();
507	CRBufferObjectBits *bb = &sb->bufferobject;
508
509	FLUSH();
510
511	if (g->current.inBeginEnd) {
512	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
513	"glUnmapBufferARB called in begin/end");
514	return GL_FALSE;
515	}
516
517	if (target == GL_ARRAY_BUFFER_ARB) {
518	obj = b->arrayBuffer;
519	}
520	else if (target == GL_ELEMENT_ARRAY_BUFFER_ARB) {
521	obj = b->elementsBuffer;
522	}
523	else {
524	crStateError(__LINE__, __FILE__, GL_INVALID_ENUM,
525	"glUnmapBufferARB(target)");
526	return GL_FALSE;
527	}
528
529	if (obj->name == 0) {
530	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION, "glUnmapBufferARB");
531	return GL_FALSE;
532	}
533
534	if (!obj->pointer) {
535	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION, "glUnmapBufferARB");
536	return GL_FALSE;
537	}
538
539	obj->pointer = NULL;
540
541	if (obj->access != GL_READ_ONLY_ARB) {
542	/* the data was most likely modified */
543	DIRTY(bb->dirty, g->neg_bitid);
544	DIRTY(obj->dirty, g->neg_bitid);
545	obj->dirtyStart = 0;
546	obj->dirtyLength = obj->size;
547	}
548
549	return GL_TRUE;
550	}
551
552
553	void STATE_APIENTRY
554	crStateGetBufferParameterivARB(GLenum target, GLenum pname, GLint *params)
555	{
556	CRContext *g = GetCurrentContext();
557	CRBufferObjectState *b = &g->bufferobject;
558	CRBufferObject *obj;
559
560	FLUSH();
561
562	if (g->current.inBeginEnd) {
563	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
564	"glGetBufferParameterivARB called in begin/end");
565	return;
566	}
567
568	if (target == GL_ARRAY_BUFFER_ARB) {
569	obj = b->arrayBuffer;
570	}
571	else if (target == GL_ELEMENT_ARRAY_BUFFER_ARB) {
572	obj = b->elementsBuffer;
573	}
574	else {
575	crStateError(__LINE__, __FILE__, GL_INVALID_ENUM,
576	"glGetBufferParameterivARB(target)");
577	return;
578	}
579
580	switch (pname) {
581	case GL_BUFFER_SIZE_ARB:
582	*params = obj->size;
583	break;
584	case GL_BUFFER_USAGE_ARB:
585	*params = obj->usage;
586	break;
587	case GL_BUFFER_ACCESS_ARB:
588	*params = obj->access;
589	break;
590	case GL_BUFFER_MAPPED_ARB:
591	*params = (obj->pointer != NULL);
592	break;
593	default:
594	crStateError(__LINE__, __FILE__, GL_INVALID_ENUM,
595	"glGetBufferParameterivARB(pname)");
596	return;
597	}
598	}
599
600
601	void STATE_APIENTRY
602	crStateGetBufferPointervARB(GLenum target, GLenum pname, GLvoid **params)
603	{
604	CRContext *g = GetCurrentContext();
605	CRBufferObjectState *b = &g->bufferobject;
606	CRBufferObject *obj;
607
608	FLUSH();
609
610	if (g->current.inBeginEnd) {
611	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
612	"glGetBufferPointervARB called in begin/end");
613	return;
614	}
615
616	if (target == GL_ARRAY_BUFFER_ARB) {
617	obj = b->arrayBuffer;
618	}
619	else if (target == GL_ELEMENT_ARRAY_BUFFER_ARB) {
620	obj = b->elementsBuffer;
621	}
622	else {
623	crStateError(__LINE__, __FILE__, GL_INVALID_ENUM,
624	"glGetBufferPointervARB(target)");
625	return;
626	}
627
628	if (pname != GL_BUFFER_MAP_POINTER_ARB) {
629	crStateError(__LINE__, __FILE__, GL_INVALID_ENUM,
630	"glGetBufferPointervARB(pname)");
631	return;
632	}
633
634	*params = obj->pointer;
635	}
636
637
638	/**
639	* We need to check if the GL_EXT_vertex/pixel_buffer_object extensions
640	* are supported before calling any of the diff_api functions.
641	* This flag indidcates if the extensions is available (1), not available (0)
642	* or needs to be tested for (-1).
643	* If we don't do this, we can segfault inside OpenGL.
644	* Ideally, the render SPU should no-op unsupported GL functions, but
645	* that's a bit complicated.
646	*/
647	static GLboolean
648	HaveBufferObjectExtension(void)
649	{
650	static GLint haveBufferObjectExt = -1;
651
652	if (haveBufferObjectExt == -1) {
653	const char *ext;
654	/* XXX this check is temporary. We need to make the tilesort SPU plug
655	* GetString into the diff'ing table in order for this to really work.
656	*/
657	if (!diff_api.GetString) {
658	haveBufferObjectExt = 0;
659	return 0;
660	}
661	CRASSERT(diff_api.GetString);
662	ext = (const char *) diff_api.GetString(GL_EXTENSIONS);
663	if (crStrstr(ext, "GL_ARB_vertex_buffer_object") \|\|
664	crStrstr(ext, "GL_ARB_pixel_buffer_object")) {
665	haveBufferObjectExt = 1;
666	}
667	else {
668	haveBufferObjectExt = 0;
669	}
670	}
671	return haveBufferObjectExt;
672	}
673
674
675	void crStateBufferObjectDiff(CRBufferObjectBits bb, CRbitvalue bitID,
676	CRContext fromCtx, CRContext toCtx)
677	{
678	CRBufferObjectState *from = &(fromCtx->bufferobject);
679	const CRBufferObjectState *to = &(toCtx->bufferobject);
680
681	if (!HaveBufferObjectExtension())
682	return;
683
684	/* ARRAY_BUFFER binding */
685	if (CHECKDIRTY(bb->arrayBinding, bitID)) {
686	if (from->arrayBuffer != to->arrayBuffer) {
687	GLuint bufferID = to->arrayBuffer ? to->arrayBuffer->name : 0;
688	diff_api.BindBufferARB(GL_ARRAY_BUFFER_ARB, bufferID);
689	CLEARDIRTY2(bb->arrayBinding, bitID);
690	from->arrayBuffer = to->arrayBuffer;
691	}
692	}
693
694	if (to->arrayBuffer && CHECKDIRTY(to->arrayBuffer->dirty, bitID)) {
695	/* update array buffer data */
696	CRBufferObject *bufObj = to->arrayBuffer;
697	CRASSERT(bufObj);
698	if (bufObj->dirtyStart == 0 && bufObj->dirtyLength == (int) bufObj->size) {
699	/* update whole buffer */
700	diff_api.BufferDataARB(GL_ARRAY_BUFFER_ARB, bufObj->size,
701	bufObj->data, bufObj->usage);
702	}
703	else {
704	/* update sub buffer */
705	diff_api.BufferSubDataARB(GL_ARRAY_BUFFER_ARB,
706	bufObj->dirtyStart,
707	bufObj->dirtyLength,
708	(char *) bufObj->data
709	+ bufObj->dirtyStart);
710	}
711	CLEARDIRTY2(bufObj->dirty, bitID);
712	#if 0
713	bufObj->dirtyStart = 0;
714	bufObj->dirtyLength = 0;
715	#endif
716	}
717
718	/* ELEMENTS_BUFFER binding */
719	if (CHECKDIRTY(bb->elementsBinding, bitID)) {
720	if (from->elementsBuffer != to->elementsBuffer) {
721	GLuint bufferID = to->elementsBuffer ? to->elementsBuffer->name : 0;
722	diff_api.BindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, bufferID);
723	CLEARDIRTY2(bb->elementsBinding, bitID);
724	from->elementsBuffer = to->elementsBuffer;
725	}
726	}
727
728	if (to->elementsBuffer && CHECKDIRTY(to->elementsBuffer->dirty, bitID)) {
729	/* update element buffer data */
730	CRBufferObject *bufObj = to->elementsBuffer;
731	CRASSERT(bufObj);
732	if (bufObj->dirtyStart == 0 && bufObj->dirtyLength == (int) bufObj->size) {
733	/* update whole buffer */
734	diff_api.BufferDataARB(GL_ELEMENT_ARRAY_BUFFER_ARB, bufObj->size,
735	bufObj->data, bufObj->usage);
736	}
737	else {
738	/* update sub buffer */
739	diff_api.BufferSubDataARB(GL_ELEMENT_ARRAY_BUFFER_ARB,
740	bufObj->dirtyStart,
741	bufObj->dirtyLength,
742	(char *) bufObj->data
743	+ bufObj->dirtyStart);
744	}
745	CLEARDIRTY2(bufObj->dirty, bitID);
746	#if 0
747	bufObj->dirtyStart = 0;
748	bufObj->dirtyLength = 0;
749	#endif
750	}
751	}
752
753	static void crStateBufferObjectSyncCB(unsigned long key, void data1, void data2)
754	{
755	CRBufferObject pBufferObj = (CRBufferObject ) data1;
756	CRBufferObjectState pState = (CRBufferObjectState ) data2;
757
758	if (pBufferObj->data)
759	{
760	diff_api.BindBufferARB(GL_ARRAY_BUFFER_ARB, pBufferObj->name);
761	diff_api.BufferDataARB(GL_ARRAY_BUFFER_ARB, pBufferObj->size, pBufferObj->data, pBufferObj->usage);
762
763	if (!pState->retainBufferData)
764	{
765	crFree(pBufferObj->data);
766	pBufferObj->data = NULL;
767	}
768	}
769	}
770
771	/*
772	* XXX this function might need some testing/fixing.
773	*/
774	void crStateBufferObjectSwitch(CRBufferObjectBits bb, CRbitvalue bitID,
775	CRContext fromCtx, CRContext toCtx)
776	{
777	const CRBufferObjectState *from = &(fromCtx->bufferobject);
778	CRBufferObjectState *to = &(toCtx->bufferobject);
779	int i;
780
781	if (!HaveBufferObjectExtension())
782	return;
783
784	if (to->bResyncNeeded)
785	{
786	CRClientPointer *cp;
787
788	crHashtableWalk(to->buffers, crStateBufferObjectSyncCB, to);
789	to->bResyncNeeded = GL_FALSE;
790
791	/@todo, move to state_client.c/
792
793	cp = &toCtx->client.array.v;
794	if (cp->buffer->name)
795	{
796	diff_api.BindBufferARB(GL_ARRAY_BUFFER_ARB, cp->buffer->name);
797	diff_api.VertexPointer(cp->size, cp->type, cp->stride, cp->p);
798	}
799
800	cp = &toCtx->client.array.c;
801	if (cp->buffer->name)
802	{
803	diff_api.BindBufferARB(GL_ARRAY_BUFFER_ARB, cp->buffer->name);
804	diff_api.ColorPointer(cp->size, cp->type, cp->stride, cp->p);
805	}
806
807	cp = &toCtx->client.array.f;
808	if (cp->buffer->name)
809	{
810	diff_api.BindBufferARB(GL_ARRAY_BUFFER_ARB, cp->buffer->name);
811	diff_api.FogCoordPointerEXT(cp->type, cp->stride, cp->p);
812	}
813
814	cp = &toCtx->client.array.s;
815	if (cp->buffer->name)
816	{
817	diff_api.BindBufferARB(GL_ARRAY_BUFFER_ARB, cp->buffer->name);
818	diff_api.SecondaryColorPointerEXT(cp->size, cp->type, cp->stride, cp->p);
819	}
820
821	cp = &toCtx->client.array.e;
822	if (cp->buffer->name)
823	{
824	diff_api.BindBufferARB(GL_ARRAY_BUFFER_ARB, cp->buffer->name);
825	diff_api.EdgeFlagPointer(cp->stride, cp->p);
826	}
827
828	cp = &toCtx->client.array.i;
829	if (cp->buffer->name)
830	{
831	diff_api.BindBufferARB(GL_ARRAY_BUFFER_ARB, cp->buffer->name);
832	diff_api.IndexPointer(cp->type, cp->stride, cp->p);
833	}
834
835	cp = &toCtx->client.array.n;
836	if (cp->buffer->name)
837	{
838	diff_api.BindBufferARB(GL_ARRAY_BUFFER_ARB, cp->buffer->name);
839	diff_api.NormalPointer(cp->type, cp->stride, cp->p);
840	}
841
842	for (i = 0; i < CR_MAX_TEXTURE_UNITS; i++)
843	{
844	cp = &toCtx->client.array.t[i];
845	if (cp->buffer->name)
846	{
847	if (diff_api.ActiveTextureARB)
848	diff_api.ActiveTextureARB(i+GL_TEXTURE0_ARB);
849	diff_api.BindBufferARB(GL_ARRAY_BUFFER_ARB, cp->buffer->name);
850	diff_api.TexCoordPointer(cp->size, cp->type, cp->stride, cp->p);
851	}
852	}
853
854	if (diff_api.ActiveTextureARB)
855	diff_api.ActiveTextureARB(toCtx->client.curClientTextureUnit+GL_TEXTURE0_ARB);
856
857	#ifdef CR_NV_vertex_program
858	for (i = 0; i < CR_MAX_VERTEX_ATTRIBS; i++)
859	{
860	cp = &toCtx->client.array.a[i];
861	if (cp->buffer->name)
862	{
863	diff_api.BindBufferARB(GL_ARRAY_BUFFER_ARB, cp->buffer->name);
864	diff_api.VertexAttribPointerARB(i, cp->size, cp->type, cp->normalized, cp->stride, cp->p);
865	}
866	}
867	#endif
868	diff_api.BindBufferARB(GL_ARRAY_BUFFER_ARB, to->arrayBuffer->name);
869	diff_api.BindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, to->elementsBuffer->name);
870	}
871
872	/* ARRAY_BUFFER binding */
873	if (CHECKDIRTY(bb->arrayBinding, bitID)) {
874	if (from->arrayBuffer != to->arrayBuffer) {
875	GLuint bufferID = to->arrayBuffer ? to->arrayBuffer->name : 0;
876	diff_api.BindBufferARB(GL_ARRAY_BUFFER_ARB, bufferID);
877	FILLDIRTY(bb->arrayBinding);
878	}
879	CLEARDIRTY2(bb->arrayBinding, bitID);
880	}
881
882	if (to->arrayBuffer && CHECKDIRTY(to->arrayBuffer->dirty, bitID)) {
883	/* update array buffer data */
884	CRBufferObject *bufObj = to->arrayBuffer;
885	CRASSERT(bufObj);
886	if (bufObj->dirtyStart == 0 && bufObj->dirtyLength == (int) bufObj->size) {
887	/* update whole buffer */
888	diff_api.BufferDataARB(GL_ARRAY_BUFFER_ARB, bufObj->size,
889	bufObj->data, bufObj->usage);
890	}
891	else {
892	/* update sub buffer */
893	diff_api.BufferSubDataARB(GL_ARRAY_BUFFER_ARB,
894	bufObj->dirtyStart,
895	bufObj->dirtyLength,
896	(char *) bufObj->data
897	+ bufObj->dirtyStart);
898	}
899	FILLDIRTY(bufObj->dirty);
900	CLEARDIRTY2(bufObj->dirty, bitID);
901	#if 0
902	bufObj->dirtyStart = 0;
903	bufObj->dirtyLength = 0;
904	#endif
905	}
906
907	/* ELEMENTS_BUFFER binding */
908	if (CHECKDIRTY(bb->elementsBinding, bitID)) {
909	if (from->elementsBuffer != to->elementsBuffer) {
910	GLuint bufferID = to->elementsBuffer ? to->elementsBuffer->name : 0;
911	diff_api.BindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, bufferID);
912	FILLDIRTY(bb->elementsBinding);
913	}
914	CLEARDIRTY2(bb->elementsBinding, bitID);
915	}
916
917	if (to->elementsBuffer && CHECKDIRTY(to->elementsBuffer->dirty, bitID)) {
918	/* update element buffer data */
919	CRBufferObject *bufObj = to->elementsBuffer;
920	CRASSERT(bufObj);
921	if (bufObj->dirtyStart == 0 && bufObj->dirtyLength == (int) bufObj->size) {
922	/* update whole buffer */
923	diff_api.BufferDataARB(GL_ELEMENT_ARRAY_BUFFER_ARB, bufObj->size,
924	bufObj->data, bufObj->usage);
925	}
926	else {
927	/* update sub buffer */
928	diff_api.BufferSubDataARB(GL_ELEMENT_ARRAY_BUFFER_ARB,
929	bufObj->dirtyStart,
930	bufObj->dirtyLength,
931	(char *) bufObj->data
932	+ bufObj->dirtyStart);
933	}
934	FILLDIRTY(bufObj->dirty);
935	CLEARDIRTY2(bufObj->dirty, bitID);
936	#if 0
937	bufObj->dirtyStart = 0;
938	bufObj->dirtyLength = 0;
939	#endif
940	}
941	}
942
943

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source: vbox/trunk/src/VBox/GuestHost/OpenGL/state_tracker/state_bufferobject.c@ 23123

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