1 /*
2 * Mesa 3-D graphics library
3 * Version: 7.6
4 *
5 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
6 * Copyright (C) 2009 VMware, Inc. All Rights Reserved.
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
22 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 */
25
26
27 /**
28 * \file bufferobj.c
29 * \brief Functions for the GL_ARB_vertex/pixel_buffer_object extensions.
30 * \author Brian Paul, Ian Romanick
31 */
32
33 #include <stdbool.h>
34 #include "glheader.h"
35 #include "enums.h"
36 #include "hash.h"
37 #include "imports.h"
38 #include "image.h"
39 #include "context.h"
40 #include "bufferobj.h"
41 #include "fbobject.h"
42 #include "mfeatures.h"
43 #include "mtypes.h"
44 #include "texobj.h"
45 #include "transformfeedback.h"
46 #include "dispatch.h"
47
48
49 /* Debug flags */
50 /*#define VBO_DEBUG*/
51 /*#define BOUNDS_CHECK*/
52
53
54 /**
55 * Used as a placeholder for buffer objects between glGenBuffers() and
56 * glBindBuffer() so that glIsBuffer() can work correctly.
57 */
58 static struct gl_buffer_object DummyBufferObject;
59
60
61 /**
62 * Return pointer to address of a buffer object target.
63 * \param ctx the GL context
64 * \param target the buffer object target to be retrieved.
65 * \return pointer to pointer to the buffer object bound to \c target in the
66 * specified context or \c NULL if \c target is invalid.
67 */
68 static inline struct gl_buffer_object **
get_buffer_target(struct gl_context * ctx,GLenum target)69 get_buffer_target(struct gl_context *ctx, GLenum target)
70 {
71 /* Other targets are only supported in desktop OpenGL and OpenGL ES 3.0.
72 */
73 if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx)
74 && target != GL_ARRAY_BUFFER && target != GL_ELEMENT_ARRAY_BUFFER)
75 return NULL;
76
77 switch (target) {
78 case GL_ARRAY_BUFFER_ARB:
79 return &ctx->Array.ArrayBufferObj;
80 case GL_ELEMENT_ARRAY_BUFFER_ARB:
81 return &ctx->Array.ArrayObj->ElementArrayBufferObj;
82 case GL_PIXEL_PACK_BUFFER_EXT:
83 return &ctx->Pack.BufferObj;
84 case GL_PIXEL_UNPACK_BUFFER_EXT:
85 return &ctx->Unpack.BufferObj;
86 case GL_COPY_READ_BUFFER:
87 return &ctx->CopyReadBuffer;
88 case GL_COPY_WRITE_BUFFER:
89 return &ctx->CopyWriteBuffer;
90 #if FEATURE_EXT_transform_feedback
91 case GL_TRANSFORM_FEEDBACK_BUFFER:
92 if (ctx->Extensions.EXT_transform_feedback) {
93 return &ctx->TransformFeedback.CurrentBuffer;
94 }
95 break;
96 #endif
97 case GL_TEXTURE_BUFFER:
98 if (_mesa_is_desktop_gl(ctx)
99 && ctx->Extensions.ARB_texture_buffer_object) {
100 return &ctx->Texture.BufferObject;
101 }
102 break;
103 case GL_UNIFORM_BUFFER:
104 if (ctx->Extensions.ARB_uniform_buffer_object) {
105 return &ctx->UniformBuffer;
106 }
107 break;
108 default:
109 return NULL;
110 }
111 return NULL;
112 }
113
114
115 /**
116 * Get the buffer object bound to the specified target in a GL context.
117 * \param ctx the GL context
118 * \param target the buffer object target to be retrieved.
119 * \return pointer to the buffer object bound to \c target in the
120 * specified context or \c NULL if \c target is invalid.
121 */
122 static inline struct gl_buffer_object *
get_buffer(struct gl_context * ctx,const char * func,GLenum target)123 get_buffer(struct gl_context *ctx, const char *func, GLenum target)
124 {
125 struct gl_buffer_object **bufObj = get_buffer_target(ctx, target);
126
127 if (!bufObj) {
128 _mesa_error(ctx, GL_INVALID_ENUM, "%s(target)", func);
129 return NULL;
130 }
131
132 if (!_mesa_is_bufferobj(*bufObj)) {
133 _mesa_error(ctx, GL_INVALID_OPERATION, "%s(buffer 0)", func);
134 return NULL;
135 }
136
137 return *bufObj;
138 }
139
140
141 static inline GLbitfield
default_access_mode(const struct gl_context * ctx)142 default_access_mode(const struct gl_context *ctx)
143 {
144 /* Table 2.6 on page 31 (page 44 of the PDF) of the OpenGL 1.5 spec says:
145 *
146 * Name Type Initial Value Legal Values
147 * ... ... ... ...
148 * BUFFER_ACCESS enum READ_WRITE READ_ONLY, WRITE_ONLY
149 * READ_WRITE
150 *
151 * However, table 6.8 in the GL_OES_mapbuffer extension says:
152 *
153 * Get Value Type Get Command Value Description
154 * --------- ---- ----------- ----- -----------
155 * BUFFER_ACCESS_OES Z1 GetBufferParameteriv WRITE_ONLY_OES buffer map flag
156 *
157 * The difference is because GL_OES_mapbuffer only supports mapping buffers
158 * write-only.
159 */
160 return _mesa_is_gles(ctx)
161 ? GL_MAP_WRITE_BIT : (GL_MAP_READ_BIT | GL_MAP_WRITE_BIT);
162 }
163
164
165 /**
166 * Convert a GLbitfield describing the mapped buffer access flags
167 * into one of GL_READ_WRITE, GL_READ_ONLY, or GL_WRITE_ONLY.
168 */
169 static GLenum
simplified_access_mode(GLbitfield access)170 simplified_access_mode(GLbitfield access)
171 {
172 const GLbitfield rwFlags = GL_MAP_READ_BIT | GL_MAP_WRITE_BIT;
173 if ((access & rwFlags) == rwFlags)
174 return GL_READ_WRITE;
175 if ((access & GL_MAP_READ_BIT) == GL_MAP_READ_BIT)
176 return GL_READ_ONLY;
177 if ((access & GL_MAP_WRITE_BIT) == GL_MAP_WRITE_BIT)
178 return GL_WRITE_ONLY;
179 return GL_READ_WRITE; /* this should never happen, but no big deal */
180 }
181
182
183 /**
184 * Tests the subdata range parameters and sets the GL error code for
185 * \c glBufferSubDataARB and \c glGetBufferSubDataARB.
186 *
187 * \param ctx GL context.
188 * \param target Buffer object target on which to operate.
189 * \param offset Offset of the first byte of the subdata range.
190 * \param size Size, in bytes, of the subdata range.
191 * \param caller Name of calling function for recording errors.
192 * \return A pointer to the buffer object bound to \c target in the
193 * specified context or \c NULL if any of the parameter or state
194 * conditions for \c glBufferSubDataARB or \c glGetBufferSubDataARB
195 * are invalid.
196 *
197 * \sa glBufferSubDataARB, glGetBufferSubDataARB
198 */
199 static struct gl_buffer_object *
buffer_object_subdata_range_good(struct gl_context * ctx,GLenum target,GLintptrARB offset,GLsizeiptrARB size,const char * caller)200 buffer_object_subdata_range_good( struct gl_context * ctx, GLenum target,
201 GLintptrARB offset, GLsizeiptrARB size,
202 const char *caller )
203 {
204 struct gl_buffer_object *bufObj;
205
206 if (size < 0) {
207 _mesa_error(ctx, GL_INVALID_VALUE, "%s(size < 0)", caller);
208 return NULL;
209 }
210
211 if (offset < 0) {
212 _mesa_error(ctx, GL_INVALID_VALUE, "%s(offset < 0)", caller);
213 return NULL;
214 }
215
216 bufObj = get_buffer(ctx, caller, target);
217 if (!bufObj)
218 return NULL;
219
220 if (offset + size > bufObj->Size) {
221 _mesa_error(ctx, GL_INVALID_VALUE,
222 "%s(offset %lu + size %lu > buffer size %lu)", caller,
223 (unsigned long) offset,
224 (unsigned long) size,
225 (unsigned long) bufObj->Size);
226 return NULL;
227 }
228 if (_mesa_bufferobj_mapped(bufObj)) {
229 /* Buffer is currently mapped */
230 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", caller);
231 return NULL;
232 }
233
234 return bufObj;
235 }
236
237
238 /**
239 * Allocate and initialize a new buffer object.
240 *
241 * Default callback for the \c dd_function_table::NewBufferObject() hook.
242 */
243 static struct gl_buffer_object *
_mesa_new_buffer_object(struct gl_context * ctx,GLuint name,GLenum target)244 _mesa_new_buffer_object( struct gl_context *ctx, GLuint name, GLenum target )
245 {
246 struct gl_buffer_object *obj;
247
248 (void) ctx;
249
250 obj = MALLOC_STRUCT(gl_buffer_object);
251 _mesa_initialize_buffer_object(ctx, obj, name, target);
252 return obj;
253 }
254
255
256 /**
257 * Delete a buffer object.
258 *
259 * Default callback for the \c dd_function_table::DeleteBuffer() hook.
260 */
261 static void
_mesa_delete_buffer_object(struct gl_context * ctx,struct gl_buffer_object * bufObj)262 _mesa_delete_buffer_object(struct gl_context *ctx,
263 struct gl_buffer_object *bufObj)
264 {
265 (void) ctx;
266
267 if (bufObj->Data)
268 free(bufObj->Data);
269
270 /* assign strange values here to help w/ debugging */
271 bufObj->RefCount = -1000;
272 bufObj->Name = ~0;
273
274 _glthread_DESTROY_MUTEX(bufObj->Mutex);
275 free(bufObj);
276 }
277
278
279
280 /**
281 * Set ptr to bufObj w/ reference counting.
282 * This is normally only called from the _mesa_reference_buffer_object() macro
283 * when there's a real pointer change.
284 */
285 void
_mesa_reference_buffer_object_(struct gl_context * ctx,struct gl_buffer_object ** ptr,struct gl_buffer_object * bufObj)286 _mesa_reference_buffer_object_(struct gl_context *ctx,
287 struct gl_buffer_object **ptr,
288 struct gl_buffer_object *bufObj)
289 {
290 if (*ptr) {
291 /* Unreference the old buffer */
292 GLboolean deleteFlag = GL_FALSE;
293 struct gl_buffer_object *oldObj = *ptr;
294
295 _glthread_LOCK_MUTEX(oldObj->Mutex);
296 ASSERT(oldObj->RefCount > 0);
297 oldObj->RefCount--;
298 #if 0
299 printf("BufferObj %p %d DECR to %d\n",
300 (void *) oldObj, oldObj->Name, oldObj->RefCount);
301 #endif
302 deleteFlag = (oldObj->RefCount == 0);
303 _glthread_UNLOCK_MUTEX(oldObj->Mutex);
304
305 if (deleteFlag) {
306
307 /* some sanity checking: don't delete a buffer still in use */
308 #if 0
309 /* unfortunately, these tests are invalid during context tear-down */
310 ASSERT(ctx->Array.ArrayBufferObj != bufObj);
311 ASSERT(ctx->Array.ArrayObj->ElementArrayBufferObj != bufObj);
312 ASSERT(ctx->Array.ArrayObj->Vertex.BufferObj != bufObj);
313 #endif
314
315 ASSERT(ctx->Driver.DeleteBuffer);
316 ctx->Driver.DeleteBuffer(ctx, oldObj);
317 }
318
319 *ptr = NULL;
320 }
321 ASSERT(!*ptr);
322
323 if (bufObj) {
324 /* reference new buffer */
325 _glthread_LOCK_MUTEX(bufObj->Mutex);
326 if (bufObj->RefCount == 0) {
327 /* this buffer's being deleted (look just above) */
328 /* Not sure this can every really happen. Warn if it does. */
329 _mesa_problem(NULL, "referencing deleted buffer object");
330 *ptr = NULL;
331 }
332 else {
333 bufObj->RefCount++;
334 #if 0
335 printf("BufferObj %p %d INCR to %d\n",
336 (void *) bufObj, bufObj->Name, bufObj->RefCount);
337 #endif
338 *ptr = bufObj;
339 }
340 _glthread_UNLOCK_MUTEX(bufObj->Mutex);
341 }
342 }
343
344
345 /**
346 * Initialize a buffer object to default values.
347 */
348 void
_mesa_initialize_buffer_object(struct gl_context * ctx,struct gl_buffer_object * obj,GLuint name,GLenum target)349 _mesa_initialize_buffer_object( struct gl_context *ctx,
350 struct gl_buffer_object *obj,
351 GLuint name, GLenum target )
352 {
353 (void) target;
354
355 memset(obj, 0, sizeof(struct gl_buffer_object));
356 _glthread_INIT_MUTEX(obj->Mutex);
357 obj->RefCount = 1;
358 obj->Name = name;
359 obj->Usage = GL_STATIC_DRAW_ARB;
360 obj->AccessFlags = default_access_mode(ctx);
361 }
362
363
364
365 /**
366 * Callback called from _mesa_HashWalk()
367 */
368 static void
count_buffer_size(GLuint key,void * data,void * userData)369 count_buffer_size(GLuint key, void *data, void *userData)
370 {
371 const struct gl_buffer_object *bufObj =
372 (const struct gl_buffer_object *) data;
373 GLuint *total = (GLuint *) userData;
374
375 *total = *total + bufObj->Size;
376 }
377
378
379 /**
380 * Compute total size (in bytes) of all buffer objects for the given context.
381 * For debugging purposes.
382 */
383 GLuint
_mesa_total_buffer_object_memory(struct gl_context * ctx)384 _mesa_total_buffer_object_memory(struct gl_context *ctx)
385 {
386 GLuint total = 0;
387
388 _mesa_HashWalk(ctx->Shared->BufferObjects, count_buffer_size, &total);
389
390 return total;
391 }
392
393
394 /**
395 * Allocate space for and store data in a buffer object. Any data that was
396 * previously stored in the buffer object is lost. If \c data is \c NULL,
397 * memory will be allocated, but no copy will occur.
398 *
399 * This is the default callback for \c dd_function_table::BufferData()
400 * Note that all GL error checking will have been done already.
401 *
402 * \param ctx GL context.
403 * \param target Buffer object target on which to operate.
404 * \param size Size, in bytes, of the new data store.
405 * \param data Pointer to the data to store in the buffer object. This
406 * pointer may be \c NULL.
407 * \param usage Hints about how the data will be used.
408 * \param bufObj Object to be used.
409 *
410 * \return GL_TRUE for success, GL_FALSE for failure
411 * \sa glBufferDataARB, dd_function_table::BufferData.
412 */
413 static GLboolean
_mesa_buffer_data(struct gl_context * ctx,GLenum target,GLsizeiptrARB size,const GLvoid * data,GLenum usage,struct gl_buffer_object * bufObj)414 _mesa_buffer_data( struct gl_context *ctx, GLenum target, GLsizeiptrARB size,
415 const GLvoid * data, GLenum usage,
416 struct gl_buffer_object * bufObj )
417 {
418 void * new_data;
419
420 (void) ctx; (void) target;
421
422 new_data = _mesa_realloc( bufObj->Data, bufObj->Size, size );
423 if (new_data) {
424 bufObj->Data = (GLubyte *) new_data;
425 bufObj->Size = size;
426 bufObj->Usage = usage;
427
428 if (data) {
429 memcpy( bufObj->Data, data, size );
430 }
431
432 return GL_TRUE;
433 }
434 else {
435 return GL_FALSE;
436 }
437 }
438
439
440 /**
441 * Replace data in a subrange of buffer object. If the data range
442 * specified by \c size + \c offset extends beyond the end of the buffer or
443 * if \c data is \c NULL, no copy is performed.
444 *
445 * This is the default callback for \c dd_function_table::BufferSubData()
446 * Note that all GL error checking will have been done already.
447 *
448 * \param ctx GL context.
449 * \param target Buffer object target on which to operate.
450 * \param offset Offset of the first byte to be modified.
451 * \param size Size, in bytes, of the data range.
452 * \param data Pointer to the data to store in the buffer object.
453 * \param bufObj Object to be used.
454 *
455 * \sa glBufferSubDataARB, dd_function_table::BufferSubData.
456 */
457 static void
_mesa_buffer_subdata(struct gl_context * ctx,GLintptrARB offset,GLsizeiptrARB size,const GLvoid * data,struct gl_buffer_object * bufObj)458 _mesa_buffer_subdata( struct gl_context *ctx, GLintptrARB offset,
459 GLsizeiptrARB size, const GLvoid * data,
460 struct gl_buffer_object * bufObj )
461 {
462 (void) ctx;
463
464 /* this should have been caught in _mesa_BufferSubData() */
465 ASSERT(size + offset <= bufObj->Size);
466
467 if (bufObj->Data) {
468 memcpy( (GLubyte *) bufObj->Data + offset, data, size );
469 }
470 }
471
472
473 /**
474 * Retrieve data from a subrange of buffer object. If the data range
475 * specified by \c size + \c offset extends beyond the end of the buffer or
476 * if \c data is \c NULL, no copy is performed.
477 *
478 * This is the default callback for \c dd_function_table::GetBufferSubData()
479 * Note that all GL error checking will have been done already.
480 *
481 * \param ctx GL context.
482 * \param target Buffer object target on which to operate.
483 * \param offset Offset of the first byte to be fetched.
484 * \param size Size, in bytes, of the data range.
485 * \param data Destination for data
486 * \param bufObj Object to be used.
487 *
488 * \sa glBufferGetSubDataARB, dd_function_table::GetBufferSubData.
489 */
490 static void
_mesa_buffer_get_subdata(struct gl_context * ctx,GLintptrARB offset,GLsizeiptrARB size,GLvoid * data,struct gl_buffer_object * bufObj)491 _mesa_buffer_get_subdata( struct gl_context *ctx, GLintptrARB offset,
492 GLsizeiptrARB size, GLvoid * data,
493 struct gl_buffer_object * bufObj )
494 {
495 (void) ctx;
496
497 if (bufObj->Data && ((GLsizeiptrARB) (size + offset) <= bufObj->Size)) {
498 memcpy( data, (GLubyte *) bufObj->Data + offset, size );
499 }
500 }
501
502
503 /**
504 * Default fallback for \c dd_function_table::MapBufferRange().
505 * Called via glMapBufferRange().
506 */
507 static void *
_mesa_buffer_map_range(struct gl_context * ctx,GLintptr offset,GLsizeiptr length,GLbitfield access,struct gl_buffer_object * bufObj)508 _mesa_buffer_map_range( struct gl_context *ctx, GLintptr offset,
509 GLsizeiptr length, GLbitfield access,
510 struct gl_buffer_object *bufObj )
511 {
512 (void) ctx;
513 assert(!_mesa_bufferobj_mapped(bufObj));
514 /* Just return a direct pointer to the data */
515 bufObj->Pointer = bufObj->Data + offset;
516 bufObj->Length = length;
517 bufObj->Offset = offset;
518 bufObj->AccessFlags = access;
519 return bufObj->Pointer;
520 }
521
522
523 /**
524 * Default fallback for \c dd_function_table::FlushMappedBufferRange().
525 * Called via glFlushMappedBufferRange().
526 */
527 static void
_mesa_buffer_flush_mapped_range(struct gl_context * ctx,GLintptr offset,GLsizeiptr length,struct gl_buffer_object * obj)528 _mesa_buffer_flush_mapped_range( struct gl_context *ctx,
529 GLintptr offset, GLsizeiptr length,
530 struct gl_buffer_object *obj )
531 {
532 (void) ctx;
533 (void) offset;
534 (void) length;
535 (void) obj;
536 /* no-op */
537 }
538
539
540 /**
541 * Default callback for \c dd_function_table::MapBuffer().
542 *
543 * The input parameters will have been already tested for errors.
544 *
545 * \sa glUnmapBufferARB, dd_function_table::UnmapBuffer
546 */
547 static GLboolean
_mesa_buffer_unmap(struct gl_context * ctx,struct gl_buffer_object * bufObj)548 _mesa_buffer_unmap( struct gl_context *ctx, struct gl_buffer_object *bufObj )
549 {
550 (void) ctx;
551 /* XXX we might assert here that bufObj->Pointer is non-null */
552 bufObj->Pointer = NULL;
553 bufObj->Length = 0;
554 bufObj->Offset = 0;
555 bufObj->AccessFlags = 0x0;
556 return GL_TRUE;
557 }
558
559
560 /**
561 * Default fallback for \c dd_function_table::CopyBufferSubData().
562 * Called via glCopyBufferSubData().
563 */
564 static void
_mesa_copy_buffer_subdata(struct gl_context * ctx,struct gl_buffer_object * src,struct gl_buffer_object * dst,GLintptr readOffset,GLintptr writeOffset,GLsizeiptr size)565 _mesa_copy_buffer_subdata(struct gl_context *ctx,
566 struct gl_buffer_object *src,
567 struct gl_buffer_object *dst,
568 GLintptr readOffset, GLintptr writeOffset,
569 GLsizeiptr size)
570 {
571 GLubyte *srcPtr, *dstPtr;
572
573 /* the buffers should not be mapped */
574 assert(!_mesa_bufferobj_mapped(src));
575 assert(!_mesa_bufferobj_mapped(dst));
576
577 if (src == dst) {
578 srcPtr = dstPtr = ctx->Driver.MapBufferRange(ctx, 0, src->Size,
579 GL_MAP_READ_BIT |
580 GL_MAP_WRITE_BIT, src);
581
582 if (!srcPtr)
583 return;
584
585 srcPtr += readOffset;
586 dstPtr += writeOffset;
587 } else {
588 srcPtr = ctx->Driver.MapBufferRange(ctx, readOffset, size,
589 GL_MAP_READ_BIT, src);
590 dstPtr = ctx->Driver.MapBufferRange(ctx, writeOffset, size,
591 (GL_MAP_WRITE_BIT |
592 GL_MAP_INVALIDATE_RANGE_BIT), dst);
593 }
594
595 /* Note: the src and dst regions will never overlap. Trying to do so
596 * would generate GL_INVALID_VALUE earlier.
597 */
598 if (srcPtr && dstPtr)
599 memcpy(dstPtr, srcPtr, size);
600
601 ctx->Driver.UnmapBuffer(ctx, src);
602 if (dst != src)
603 ctx->Driver.UnmapBuffer(ctx, dst);
604 }
605
606
607
608 /**
609 * Initialize the state associated with buffer objects
610 */
611 void
_mesa_init_buffer_objects(struct gl_context * ctx)612 _mesa_init_buffer_objects( struct gl_context *ctx )
613 {
614 GLuint i;
615
616 memset(&DummyBufferObject, 0, sizeof(DummyBufferObject));
617 _glthread_INIT_MUTEX(DummyBufferObject.Mutex);
618 DummyBufferObject.RefCount = 1000*1000*1000; /* never delete */
619
620 _mesa_reference_buffer_object(ctx, &ctx->Array.ArrayBufferObj,
621 ctx->Shared->NullBufferObj);
622
623 _mesa_reference_buffer_object(ctx, &ctx->CopyReadBuffer,
624 ctx->Shared->NullBufferObj);
625 _mesa_reference_buffer_object(ctx, &ctx->CopyWriteBuffer,
626 ctx->Shared->NullBufferObj);
627
628 ctx->UniformBufferBindings = calloc(ctx->Const.MaxUniformBufferBindings,
629 sizeof(*ctx->UniformBufferBindings));
630
631 _mesa_reference_buffer_object(ctx, &ctx->UniformBuffer,
632 ctx->Shared->NullBufferObj);
633
634 for (i = 0; i < ctx->Const.MaxUniformBufferBindings; i++) {
635 _mesa_reference_buffer_object(ctx,
636 &ctx->UniformBufferBindings[i].BufferObject,
637 ctx->Shared->NullBufferObj);
638 ctx->UniformBufferBindings[i].Offset = -1;
639 ctx->UniformBufferBindings[i].Size = -1;
640 }
641 }
642
643
644 void
_mesa_free_buffer_objects(struct gl_context * ctx)645 _mesa_free_buffer_objects( struct gl_context *ctx )
646 {
647 GLuint i;
648
649 _mesa_reference_buffer_object(ctx, &ctx->Array.ArrayBufferObj, NULL);
650
651 _mesa_reference_buffer_object(ctx, &ctx->CopyReadBuffer, NULL);
652 _mesa_reference_buffer_object(ctx, &ctx->CopyWriteBuffer, NULL);
653
654 _mesa_reference_buffer_object(ctx, &ctx->UniformBuffer, NULL);
655
656 for (i = 0; i < ctx->Const.MaxUniformBufferBindings; i++) {
657 _mesa_reference_buffer_object(ctx,
658 &ctx->UniformBufferBindings[i].BufferObject,
659 NULL);
660 }
661
662 free(ctx->UniformBufferBindings);
663 ctx->UniformBufferBindings = NULL;
664 }
665
666 static bool
handle_bind_buffer_gen(struct gl_context * ctx,GLenum target,GLuint buffer,struct gl_buffer_object ** buf_handle)667 handle_bind_buffer_gen(struct gl_context *ctx,
668 GLenum target,
669 GLuint buffer,
670 struct gl_buffer_object **buf_handle)
671 {
672 struct gl_buffer_object *buf = *buf_handle;
673
674 if (!buf && ctx->API == API_OPENGL_CORE) {
675 _mesa_error(ctx, GL_INVALID_OPERATION, "glBindBuffer(non-gen name)");
676 return false;
677 }
678
679 if (!buf || buf == &DummyBufferObject) {
680 /* If this is a new buffer object id, or one which was generated but
681 * never used before, allocate a buffer object now.
682 */
683 ASSERT(ctx->Driver.NewBufferObject);
684 buf = ctx->Driver.NewBufferObject(ctx, buffer, target);
685 if (!buf) {
686 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindBufferARB");
687 return false;
688 }
689 _mesa_HashInsert(ctx->Shared->BufferObjects, buffer, buf);
690 *buf_handle = buf;
691 }
692
693 return true;
694 }
695
696 /**
697 * Bind the specified target to buffer for the specified context.
698 * Called by glBindBuffer() and other functions.
699 */
700 static void
bind_buffer_object(struct gl_context * ctx,GLenum target,GLuint buffer)701 bind_buffer_object(struct gl_context *ctx, GLenum target, GLuint buffer)
702 {
703 struct gl_buffer_object *oldBufObj;
704 struct gl_buffer_object *newBufObj = NULL;
705 struct gl_buffer_object **bindTarget = NULL;
706
707 bindTarget = get_buffer_target(ctx, target);
708 if (!bindTarget) {
709 _mesa_error(ctx, GL_INVALID_ENUM, "glBindBufferARB(target 0x%x)", target);
710 return;
711 }
712
713 /* Get pointer to old buffer object (to be unbound) */
714 oldBufObj = *bindTarget;
715 if (oldBufObj && oldBufObj->Name == buffer && !oldBufObj->DeletePending)
716 return; /* rebinding the same buffer object- no change */
717
718 /*
719 * Get pointer to new buffer object (newBufObj)
720 */
721 if (buffer == 0) {
722 /* The spec says there's not a buffer object named 0, but we use
723 * one internally because it simplifies things.
724 */
725 newBufObj = ctx->Shared->NullBufferObj;
726 }
727 else {
728 /* non-default buffer object */
729 newBufObj = _mesa_lookup_bufferobj(ctx, buffer);
730 if (!handle_bind_buffer_gen(ctx, target, buffer, &newBufObj))
731 return;
732 }
733
734 /* bind new buffer */
735 _mesa_reference_buffer_object(ctx, bindTarget, newBufObj);
736
737 /* Pass BindBuffer call to device driver */
738 if (ctx->Driver.BindBuffer)
739 ctx->Driver.BindBuffer( ctx, target, newBufObj );
740 }
741
742
743 /**
744 * Update the default buffer objects in the given context to reference those
745 * specified in the shared state and release those referencing the old
746 * shared state.
747 */
748 void
_mesa_update_default_objects_buffer_objects(struct gl_context * ctx)749 _mesa_update_default_objects_buffer_objects(struct gl_context *ctx)
750 {
751 /* Bind the NullBufferObj to remove references to those
752 * in the shared context hash table.
753 */
754 bind_buffer_object( ctx, GL_ARRAY_BUFFER_ARB, 0);
755 bind_buffer_object( ctx, GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
756 bind_buffer_object( ctx, GL_PIXEL_PACK_BUFFER_ARB, 0);
757 bind_buffer_object( ctx, GL_PIXEL_UNPACK_BUFFER_ARB, 0);
758 }
759
760
761
762 /**
763 * Return the gl_buffer_object for the given ID.
764 * Always return NULL for ID 0.
765 */
766 struct gl_buffer_object *
_mesa_lookup_bufferobj(struct gl_context * ctx,GLuint buffer)767 _mesa_lookup_bufferobj(struct gl_context *ctx, GLuint buffer)
768 {
769 if (buffer == 0)
770 return NULL;
771 else
772 return (struct gl_buffer_object *)
773 _mesa_HashLookup(ctx->Shared->BufferObjects, buffer);
774 }
775
776
777 /**
778 * If *ptr points to obj, set ptr = the Null/default buffer object.
779 * This is a helper for buffer object deletion.
780 * The GL spec says that deleting a buffer object causes it to get
781 * unbound from all arrays in the current context.
782 */
783 static void
unbind(struct gl_context * ctx,struct gl_buffer_object ** ptr,struct gl_buffer_object * obj)784 unbind(struct gl_context *ctx,
785 struct gl_buffer_object **ptr,
786 struct gl_buffer_object *obj)
787 {
788 if (*ptr == obj) {
789 _mesa_reference_buffer_object(ctx, ptr, ctx->Shared->NullBufferObj);
790 }
791 }
792
793
794 /**
795 * Plug default/fallback buffer object functions into the device
796 * driver hooks.
797 */
798 void
_mesa_init_buffer_object_functions(struct dd_function_table * driver)799 _mesa_init_buffer_object_functions(struct dd_function_table *driver)
800 {
801 /* GL_ARB_vertex/pixel_buffer_object */
802 driver->NewBufferObject = _mesa_new_buffer_object;
803 driver->DeleteBuffer = _mesa_delete_buffer_object;
804 driver->BindBuffer = NULL;
805 driver->BufferData = _mesa_buffer_data;
806 driver->BufferSubData = _mesa_buffer_subdata;
807 driver->GetBufferSubData = _mesa_buffer_get_subdata;
808 driver->UnmapBuffer = _mesa_buffer_unmap;
809
810 /* GL_ARB_map_buffer_range */
811 driver->MapBufferRange = _mesa_buffer_map_range;
812 driver->FlushMappedBufferRange = _mesa_buffer_flush_mapped_range;
813
814 /* GL_ARB_copy_buffer */
815 driver->CopyBufferSubData = _mesa_copy_buffer_subdata;
816 }
817
818
819
820 /**********************************************************************/
821 /* API Functions */
822 /**********************************************************************/
823
824 void GLAPIENTRY
_mesa_BindBufferARB(GLenum target,GLuint buffer)825 _mesa_BindBufferARB(GLenum target, GLuint buffer)
826 {
827 GET_CURRENT_CONTEXT(ctx);
828 ASSERT_OUTSIDE_BEGIN_END(ctx);
829
830 if (MESA_VERBOSE & VERBOSE_API)
831 _mesa_debug(ctx, "glBindBuffer(%s, %u)\n",
832 _mesa_lookup_enum_by_nr(target), buffer);
833
834 bind_buffer_object(ctx, target, buffer);
835 }
836
837
838 /**
839 * Delete a set of buffer objects.
840 *
841 * \param n Number of buffer objects to delete.
842 * \param ids Array of \c n buffer object IDs.
843 */
844 void GLAPIENTRY
_mesa_DeleteBuffersARB(GLsizei n,const GLuint * ids)845 _mesa_DeleteBuffersARB(GLsizei n, const GLuint *ids)
846 {
847 GET_CURRENT_CONTEXT(ctx);
848 GLsizei i;
849 ASSERT_OUTSIDE_BEGIN_END(ctx);
850 FLUSH_VERTICES(ctx, 0);
851
852 if (n < 0) {
853 _mesa_error(ctx, GL_INVALID_VALUE, "glDeleteBuffersARB(n)");
854 return;
855 }
856
857 _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
858
859 for (i = 0; i < n; i++) {
860 struct gl_buffer_object *bufObj = _mesa_lookup_bufferobj(ctx, ids[i]);
861 if (bufObj) {
862 struct gl_array_object *arrayObj = ctx->Array.ArrayObj;
863 GLuint j;
864
865 ASSERT(bufObj->Name == ids[i] || bufObj == &DummyBufferObject);
866
867 if (_mesa_bufferobj_mapped(bufObj)) {
868 /* if mapped, unmap it now */
869 ctx->Driver.UnmapBuffer(ctx, bufObj);
870 bufObj->AccessFlags = default_access_mode(ctx);
871 bufObj->Pointer = NULL;
872 }
873
874 /* unbind any vertex pointers bound to this buffer */
875 for (j = 0; j < Elements(arrayObj->VertexAttrib); j++) {
876 unbind(ctx, &arrayObj->VertexAttrib[j].BufferObj, bufObj);
877 }
878
879 if (ctx->Array.ArrayBufferObj == bufObj) {
880 _mesa_BindBufferARB( GL_ARRAY_BUFFER_ARB, 0 );
881 }
882 if (arrayObj->ElementArrayBufferObj == bufObj) {
883 _mesa_BindBufferARB( GL_ELEMENT_ARRAY_BUFFER_ARB, 0 );
884 }
885
886 /* unbind ARB_copy_buffer binding points */
887 if (ctx->CopyReadBuffer == bufObj) {
888 _mesa_BindBufferARB( GL_COPY_READ_BUFFER, 0 );
889 }
890 if (ctx->CopyWriteBuffer == bufObj) {
891 _mesa_BindBufferARB( GL_COPY_WRITE_BUFFER, 0 );
892 }
893
894 /* unbind transform feedback binding points */
895 if (ctx->TransformFeedback.CurrentBuffer == bufObj) {
896 _mesa_BindBufferARB( GL_TRANSFORM_FEEDBACK_BUFFER, 0 );
897 }
898 for (j = 0; j < MAX_FEEDBACK_BUFFERS; j++) {
899 if (ctx->TransformFeedback.CurrentObject->Buffers[j] == bufObj) {
900 _mesa_BindBufferBase( GL_TRANSFORM_FEEDBACK_BUFFER, j, 0 );
901 }
902 }
903
904 /* unbind UBO binding points */
905 for (j = 0; j < ctx->Const.MaxUniformBufferBindings; j++) {
906 if (ctx->UniformBufferBindings[j].BufferObject == bufObj) {
907 _mesa_BindBufferBase( GL_UNIFORM_BUFFER, j, 0 );
908 }
909 }
910
911 if (ctx->UniformBuffer == bufObj) {
912 _mesa_BindBufferARB( GL_UNIFORM_BUFFER, 0 );
913 }
914
915 /* unbind any pixel pack/unpack pointers bound to this buffer */
916 if (ctx->Pack.BufferObj == bufObj) {
917 _mesa_BindBufferARB( GL_PIXEL_PACK_BUFFER_EXT, 0 );
918 }
919 if (ctx->Unpack.BufferObj == bufObj) {
920 _mesa_BindBufferARB( GL_PIXEL_UNPACK_BUFFER_EXT, 0 );
921 }
922
923 if (ctx->Texture.BufferObject == bufObj) {
924 _mesa_BindBufferARB( GL_TEXTURE_BUFFER, 0 );
925 }
926
927 /* The ID is immediately freed for re-use */
928 _mesa_HashRemove(ctx->Shared->BufferObjects, ids[i]);
929 /* Make sure we do not run into the classic ABA problem on bind.
930 * We don't want to allow re-binding a buffer object that's been
931 * "deleted" by glDeleteBuffers().
932 *
933 * The explicit rebinding to the default object in the current context
934 * prevents the above in the current context, but another context
935 * sharing the same objects might suffer from this problem.
936 * The alternative would be to do the hash lookup in any case on bind
937 * which would introduce more runtime overhead than this.
938 */
939 bufObj->DeletePending = GL_TRUE;
940 _mesa_reference_buffer_object(ctx, &bufObj, NULL);
941 }
942 }
943
944 _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
945 }
946
947
948 /**
949 * Generate a set of unique buffer object IDs and store them in \c buffer.
950 *
951 * \param n Number of IDs to generate.
952 * \param buffer Array of \c n locations to store the IDs.
953 */
954 void GLAPIENTRY
_mesa_GenBuffersARB(GLsizei n,GLuint * buffer)955 _mesa_GenBuffersARB(GLsizei n, GLuint *buffer)
956 {
957 GET_CURRENT_CONTEXT(ctx);
958 GLuint first;
959 GLint i;
960 ASSERT_OUTSIDE_BEGIN_END(ctx);
961
962 if (MESA_VERBOSE & VERBOSE_API)
963 _mesa_debug(ctx, "glGenBuffers(%d)\n", n);
964
965 if (n < 0) {
966 _mesa_error(ctx, GL_INVALID_VALUE, "glGenBuffersARB");
967 return;
968 }
969
970 if (!buffer) {
971 return;
972 }
973
974 /*
975 * This must be atomic (generation and allocation of buffer object IDs)
976 */
977 _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
978
979 first = _mesa_HashFindFreeKeyBlock(ctx->Shared->BufferObjects, n);
980
981 /* Insert the ID and pointer to dummy buffer object into hash table */
982 for (i = 0; i < n; i++) {
983 _mesa_HashInsert(ctx->Shared->BufferObjects, first + i,
984 &DummyBufferObject);
985 buffer[i] = first + i;
986 }
987
988 _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
989 }
990
991
992 /**
993 * Determine if ID is the name of a buffer object.
994 *
995 * \param id ID of the potential buffer object.
996 * \return \c GL_TRUE if \c id is the name of a buffer object,
997 * \c GL_FALSE otherwise.
998 */
999 GLboolean GLAPIENTRY
_mesa_IsBufferARB(GLuint id)1000 _mesa_IsBufferARB(GLuint id)
1001 {
1002 struct gl_buffer_object *bufObj;
1003 GET_CURRENT_CONTEXT(ctx);
1004 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
1005
1006 _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
1007 bufObj = _mesa_lookup_bufferobj(ctx, id);
1008 _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
1009
1010 return bufObj && bufObj != &DummyBufferObject;
1011 }
1012
1013
1014 void GLAPIENTRY
_mesa_BufferDataARB(GLenum target,GLsizeiptrARB size,const GLvoid * data,GLenum usage)1015 _mesa_BufferDataARB(GLenum target, GLsizeiptrARB size,
1016 const GLvoid * data, GLenum usage)
1017 {
1018 GET_CURRENT_CONTEXT(ctx);
1019 struct gl_buffer_object *bufObj;
1020 bool valid_usage;
1021 ASSERT_OUTSIDE_BEGIN_END(ctx);
1022
1023 if (MESA_VERBOSE & VERBOSE_API)
1024 _mesa_debug(ctx, "glBufferData(%s, %ld, %p, %s)\n",
1025 _mesa_lookup_enum_by_nr(target),
1026 (long int) size, data,
1027 _mesa_lookup_enum_by_nr(usage));
1028
1029 if (size < 0) {
1030 _mesa_error(ctx, GL_INVALID_VALUE, "glBufferDataARB(size < 0)");
1031 return;
1032 }
1033
1034 switch (usage) {
1035 case GL_STREAM_DRAW_ARB:
1036 valid_usage = (ctx->API != API_OPENGLES);
1037 break;
1038
1039 case GL_STATIC_DRAW_ARB:
1040 case GL_DYNAMIC_DRAW_ARB:
1041 valid_usage = true;
1042 break;
1043
1044 case GL_STREAM_READ_ARB:
1045 case GL_STREAM_COPY_ARB:
1046 case GL_STATIC_READ_ARB:
1047 case GL_STATIC_COPY_ARB:
1048 case GL_DYNAMIC_READ_ARB:
1049 case GL_DYNAMIC_COPY_ARB:
1050 valid_usage = _mesa_is_desktop_gl(ctx) || _mesa_is_gles3(ctx);
1051 break;
1052
1053 default:
1054 valid_usage = false;
1055 break;
1056 }
1057
1058 if (!valid_usage) {
1059 _mesa_error(ctx, GL_INVALID_ENUM, "glBufferData(usage)");
1060 return;
1061 }
1062
1063 bufObj = get_buffer(ctx, "glBufferDataARB", target);
1064 if (!bufObj)
1065 return;
1066
1067 if (_mesa_bufferobj_mapped(bufObj)) {
1068 /* Unmap the existing buffer. We'll replace it now. Not an error. */
1069 ctx->Driver.UnmapBuffer(ctx, bufObj);
1070 bufObj->AccessFlags = default_access_mode(ctx);
1071 ASSERT(bufObj->Pointer == NULL);
1072 }
1073
1074 FLUSH_VERTICES(ctx, _NEW_BUFFER_OBJECT);
1075
1076 bufObj->Written = GL_TRUE;
1077
1078 #ifdef VBO_DEBUG
1079 printf("glBufferDataARB(%u, sz %ld, from %p, usage 0x%x)\n",
1080 bufObj->Name, size, data, usage);
1081 #endif
1082
1083 #ifdef BOUNDS_CHECK
1084 size += 100;
1085 #endif
1086
1087 ASSERT(ctx->Driver.BufferData);
1088 if (!ctx->Driver.BufferData( ctx, target, size, data, usage, bufObj )) {
1089 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBufferDataARB()");
1090 }
1091 }
1092
1093
1094 void GLAPIENTRY
_mesa_BufferSubDataARB(GLenum target,GLintptrARB offset,GLsizeiptrARB size,const GLvoid * data)1095 _mesa_BufferSubDataARB(GLenum target, GLintptrARB offset,
1096 GLsizeiptrARB size, const GLvoid * data)
1097 {
1098 GET_CURRENT_CONTEXT(ctx);
1099 struct gl_buffer_object *bufObj;
1100 ASSERT_OUTSIDE_BEGIN_END(ctx);
1101
1102 bufObj = buffer_object_subdata_range_good( ctx, target, offset, size,
1103 "glBufferSubDataARB" );
1104 if (!bufObj) {
1105 /* error already recorded */
1106 return;
1107 }
1108
1109 if (size == 0)
1110 return;
1111
1112 bufObj->Written = GL_TRUE;
1113
1114 ASSERT(ctx->Driver.BufferSubData);
1115 ctx->Driver.BufferSubData( ctx, offset, size, data, bufObj );
1116 }
1117
1118
1119 void GLAPIENTRY
_mesa_GetBufferSubDataARB(GLenum target,GLintptrARB offset,GLsizeiptrARB size,void * data)1120 _mesa_GetBufferSubDataARB(GLenum target, GLintptrARB offset,
1121 GLsizeiptrARB size, void * data)
1122 {
1123 GET_CURRENT_CONTEXT(ctx);
1124 struct gl_buffer_object *bufObj;
1125 ASSERT_OUTSIDE_BEGIN_END(ctx);
1126
1127 bufObj = buffer_object_subdata_range_good( ctx, target, offset, size,
1128 "glGetBufferSubDataARB" );
1129 if (!bufObj) {
1130 /* error already recorded */
1131 return;
1132 }
1133
1134 ASSERT(ctx->Driver.GetBufferSubData);
1135 ctx->Driver.GetBufferSubData( ctx, offset, size, data, bufObj );
1136 }
1137
1138
1139 void * GLAPIENTRY
_mesa_MapBufferARB(GLenum target,GLenum access)1140 _mesa_MapBufferARB(GLenum target, GLenum access)
1141 {
1142 GET_CURRENT_CONTEXT(ctx);
1143 struct gl_buffer_object * bufObj;
1144 GLbitfield accessFlags;
1145 void *map;
1146 bool valid_access;
1147
1148 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
1149
1150 switch (access) {
1151 case GL_READ_ONLY_ARB:
1152 accessFlags = GL_MAP_READ_BIT;
1153 valid_access = _mesa_is_desktop_gl(ctx);
1154 break;
1155 case GL_WRITE_ONLY_ARB:
1156 accessFlags = GL_MAP_WRITE_BIT;
1157 valid_access = true;
1158 break;
1159 case GL_READ_WRITE_ARB:
1160 accessFlags = GL_MAP_READ_BIT | GL_MAP_WRITE_BIT;
1161 valid_access = _mesa_is_desktop_gl(ctx);
1162 break;
1163 default:
1164 valid_access = false;
1165 break;
1166 }
1167
1168 if (!valid_access) {
1169 _mesa_error(ctx, GL_INVALID_ENUM, "glMapBufferARB(access)");
1170 return NULL;
1171 }
1172
1173 bufObj = get_buffer(ctx, "glMapBufferARB", target);
1174 if (!bufObj)
1175 return NULL;
1176
1177 if (_mesa_bufferobj_mapped(bufObj)) {
1178 _mesa_error(ctx, GL_INVALID_OPERATION, "glMapBufferARB(already mapped)");
1179 return NULL;
1180 }
1181
1182 if (!bufObj->Size) {
1183 _mesa_error(ctx, GL_OUT_OF_MEMORY,
1184 "glMapBuffer(buffer size = 0)");
1185 return NULL;
1186 }
1187
1188 ASSERT(ctx->Driver.MapBufferRange);
1189 map = ctx->Driver.MapBufferRange(ctx, 0, bufObj->Size, accessFlags, bufObj);
1190 if (!map) {
1191 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glMapBufferARB(map failed)");
1192 return NULL;
1193 }
1194 else {
1195 /* The driver callback should have set these fields.
1196 * This is important because other modules (like VBO) might call
1197 * the driver function directly.
1198 */
1199 ASSERT(bufObj->Pointer == map);
1200 ASSERT(bufObj->Length == bufObj->Size);
1201 ASSERT(bufObj->Offset == 0);
1202 bufObj->AccessFlags = accessFlags;
1203 }
1204
1205 if (access == GL_WRITE_ONLY_ARB || access == GL_READ_WRITE_ARB)
1206 bufObj->Written = GL_TRUE;
1207
1208 #ifdef VBO_DEBUG
1209 printf("glMapBufferARB(%u, sz %ld, access 0x%x)\n",
1210 bufObj->Name, bufObj->Size, access);
1211 if (access == GL_WRITE_ONLY_ARB) {
1212 GLuint i;
1213 GLubyte *b = (GLubyte *) bufObj->Pointer;
1214 for (i = 0; i < bufObj->Size; i++)
1215 b[i] = i & 0xff;
1216 }
1217 #endif
1218
1219 #ifdef BOUNDS_CHECK
1220 {
1221 GLubyte *buf = (GLubyte *) bufObj->Pointer;
1222 GLuint i;
1223 /* buffer is 100 bytes larger than requested, fill with magic value */
1224 for (i = 0; i < 100; i++) {
1225 buf[bufObj->Size - i - 1] = 123;
1226 }
1227 }
1228 #endif
1229
1230 return bufObj->Pointer;
1231 }
1232
1233
1234 GLboolean GLAPIENTRY
_mesa_UnmapBufferARB(GLenum target)1235 _mesa_UnmapBufferARB(GLenum target)
1236 {
1237 GET_CURRENT_CONTEXT(ctx);
1238 struct gl_buffer_object *bufObj;
1239 GLboolean status = GL_TRUE;
1240 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
1241
1242 bufObj = get_buffer(ctx, "glUnmapBufferARB", target);
1243 if (!bufObj)
1244 return GL_FALSE;
1245
1246 if (!_mesa_bufferobj_mapped(bufObj)) {
1247 _mesa_error(ctx, GL_INVALID_OPERATION, "glUnmapBufferARB");
1248 return GL_FALSE;
1249 }
1250
1251 #ifdef BOUNDS_CHECK
1252 if (bufObj->Access != GL_READ_ONLY_ARB) {
1253 GLubyte *buf = (GLubyte *) bufObj->Pointer;
1254 GLuint i;
1255 /* check that last 100 bytes are still = magic value */
1256 for (i = 0; i < 100; i++) {
1257 GLuint pos = bufObj->Size - i - 1;
1258 if (buf[pos] != 123) {
1259 _mesa_warning(ctx, "Out of bounds buffer object write detected"
1260 " at position %d (value = %u)\n",
1261 pos, buf[pos]);
1262 }
1263 }
1264 }
1265 #endif
1266
1267 #ifdef VBO_DEBUG
1268 if (bufObj->AccessFlags & GL_MAP_WRITE_BIT) {
1269 GLuint i, unchanged = 0;
1270 GLubyte *b = (GLubyte *) bufObj->Pointer;
1271 GLint pos = -1;
1272 /* check which bytes changed */
1273 for (i = 0; i < bufObj->Size - 1; i++) {
1274 if (b[i] == (i & 0xff) && b[i+1] == ((i+1) & 0xff)) {
1275 unchanged++;
1276 if (pos == -1)
1277 pos = i;
1278 }
1279 }
1280 if (unchanged) {
1281 printf("glUnmapBufferARB(%u): %u of %ld unchanged, starting at %d\n",
1282 bufObj->Name, unchanged, bufObj->Size, pos);
1283 }
1284 }
1285 #endif
1286
1287 status = ctx->Driver.UnmapBuffer( ctx, bufObj );
1288 bufObj->AccessFlags = default_access_mode(ctx);
1289 ASSERT(bufObj->Pointer == NULL);
1290 ASSERT(bufObj->Offset == 0);
1291 ASSERT(bufObj->Length == 0);
1292
1293 return status;
1294 }
1295
1296
1297 void GLAPIENTRY
_mesa_GetBufferParameterivARB(GLenum target,GLenum pname,GLint * params)1298 _mesa_GetBufferParameterivARB(GLenum target, GLenum pname, GLint *params)
1299 {
1300 GET_CURRENT_CONTEXT(ctx);
1301 struct gl_buffer_object *bufObj;
1302 ASSERT_OUTSIDE_BEGIN_END(ctx);
1303
1304 bufObj = get_buffer(ctx, "glGetBufferParameterivARB", target);
1305 if (!bufObj)
1306 return;
1307
1308 switch (pname) {
1309 case GL_BUFFER_SIZE_ARB:
1310 *params = (GLint) bufObj->Size;
1311 return;
1312 case GL_BUFFER_USAGE_ARB:
1313 *params = bufObj->Usage;
1314 return;
1315 case GL_BUFFER_ACCESS_ARB:
1316 *params = simplified_access_mode(bufObj->AccessFlags);
1317 return;
1318 case GL_BUFFER_MAPPED_ARB:
1319 *params = _mesa_bufferobj_mapped(bufObj);
1320 return;
1321 case GL_BUFFER_ACCESS_FLAGS:
1322 if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_map_buffer_range)
1323 && !_mesa_is_gles3(ctx))
1324 goto invalid_pname;
1325 *params = bufObj->AccessFlags;
1326 return;
1327 case GL_BUFFER_MAP_OFFSET:
1328 if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_map_buffer_range)
1329 && !_mesa_is_gles3(ctx))
1330 goto invalid_pname;
1331 *params = (GLint) bufObj->Offset;
1332 return;
1333 case GL_BUFFER_MAP_LENGTH:
1334 if ((!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_map_buffer_range)
1335 && !_mesa_is_gles3(ctx))
1336 goto invalid_pname;
1337 *params = (GLint) bufObj->Length;
1338 return;
1339 default:
1340 ; /* fall-through */
1341 }
1342
1343 invalid_pname:
1344 _mesa_error(ctx, GL_INVALID_ENUM, "glGetBufferParameterivARB(pname=%s)",
1345 _mesa_lookup_enum_by_nr(pname));
1346 }
1347
1348
1349 /**
1350 * New in GL 3.2
1351 * This is pretty much a duplicate of GetBufferParameteriv() but the
1352 * GL_BUFFER_SIZE_ARB attribute will be 64-bits on a 64-bit system.
1353 */
1354 void GLAPIENTRY
_mesa_GetBufferParameteri64v(GLenum target,GLenum pname,GLint64 * params)1355 _mesa_GetBufferParameteri64v(GLenum target, GLenum pname, GLint64 *params)
1356 {
1357 GET_CURRENT_CONTEXT(ctx);
1358 struct gl_buffer_object *bufObj;
1359 ASSERT_OUTSIDE_BEGIN_END(ctx);
1360
1361 bufObj = get_buffer(ctx, "glGetBufferParameteri64v", target);
1362 if (!bufObj)
1363 return;
1364
1365 switch (pname) {
1366 case GL_BUFFER_SIZE_ARB:
1367 *params = bufObj->Size;
1368 return;
1369 case GL_BUFFER_USAGE_ARB:
1370 *params = bufObj->Usage;
1371 return;
1372 case GL_BUFFER_ACCESS_ARB:
1373 *params = simplified_access_mode(bufObj->AccessFlags);
1374 return;
1375 case GL_BUFFER_ACCESS_FLAGS:
1376 if (!ctx->Extensions.ARB_map_buffer_range)
1377 goto invalid_pname;
1378 *params = bufObj->AccessFlags;
1379 return;
1380 case GL_BUFFER_MAPPED_ARB:
1381 *params = _mesa_bufferobj_mapped(bufObj);
1382 return;
1383 case GL_BUFFER_MAP_OFFSET:
1384 if (!ctx->Extensions.ARB_map_buffer_range)
1385 goto invalid_pname;
1386 *params = bufObj->Offset;
1387 return;
1388 case GL_BUFFER_MAP_LENGTH:
1389 if (!ctx->Extensions.ARB_map_buffer_range)
1390 goto invalid_pname;
1391 *params = bufObj->Length;
1392 return;
1393 default:
1394 ; /* fall-through */
1395 }
1396
1397 invalid_pname:
1398 _mesa_error(ctx, GL_INVALID_ENUM, "glGetBufferParameteri64v(pname=%s)",
1399 _mesa_lookup_enum_by_nr(pname));
1400 }
1401
1402
1403 void GLAPIENTRY
_mesa_GetBufferPointervARB(GLenum target,GLenum pname,GLvoid ** params)1404 _mesa_GetBufferPointervARB(GLenum target, GLenum pname, GLvoid **params)
1405 {
1406 GET_CURRENT_CONTEXT(ctx);
1407 struct gl_buffer_object * bufObj;
1408 ASSERT_OUTSIDE_BEGIN_END(ctx);
1409
1410 if (pname != GL_BUFFER_MAP_POINTER_ARB) {
1411 _mesa_error(ctx, GL_INVALID_ENUM, "glGetBufferPointervARB(pname)");
1412 return;
1413 }
1414
1415 bufObj = get_buffer(ctx, "glGetBufferPointervARB", target);
1416 if (!bufObj)
1417 return;
1418
1419 *params = bufObj->Pointer;
1420 }
1421
1422
1423 void GLAPIENTRY
_mesa_CopyBufferSubData(GLenum readTarget,GLenum writeTarget,GLintptr readOffset,GLintptr writeOffset,GLsizeiptr size)1424 _mesa_CopyBufferSubData(GLenum readTarget, GLenum writeTarget,
1425 GLintptr readOffset, GLintptr writeOffset,
1426 GLsizeiptr size)
1427 {
1428 GET_CURRENT_CONTEXT(ctx);
1429 struct gl_buffer_object *src, *dst;
1430 ASSERT_OUTSIDE_BEGIN_END(ctx);
1431
1432 src = get_buffer(ctx, "glCopyBufferSubData", readTarget);
1433 if (!src)
1434 return;
1435
1436 dst = get_buffer(ctx, "glCopyBufferSubData", writeTarget);
1437 if (!dst)
1438 return;
1439
1440 if (_mesa_bufferobj_mapped(src)) {
1441 _mesa_error(ctx, GL_INVALID_OPERATION,
1442 "glCopyBufferSubData(readBuffer is mapped)");
1443 return;
1444 }
1445
1446 if (_mesa_bufferobj_mapped(dst)) {
1447 _mesa_error(ctx, GL_INVALID_OPERATION,
1448 "glCopyBufferSubData(writeBuffer is mapped)");
1449 return;
1450 }
1451
1452 if (readOffset < 0) {
1453 _mesa_error(ctx, GL_INVALID_VALUE,
1454 "glCopyBufferSubData(readOffset = %d)", (int) readOffset);
1455 return;
1456 }
1457
1458 if (writeOffset < 0) {
1459 _mesa_error(ctx, GL_INVALID_VALUE,
1460 "glCopyBufferSubData(writeOffset = %d)", (int) writeOffset);
1461 return;
1462 }
1463
1464 if (size < 0) {
1465 _mesa_error(ctx, GL_INVALID_VALUE,
1466 "glCopyBufferSubData(writeOffset = %d)", (int) size);
1467 return;
1468 }
1469
1470 if (readOffset + size > src->Size) {
1471 _mesa_error(ctx, GL_INVALID_VALUE,
1472 "glCopyBufferSubData(readOffset + size = %d)",
1473 (int) (readOffset + size));
1474 return;
1475 }
1476
1477 if (writeOffset + size > dst->Size) {
1478 _mesa_error(ctx, GL_INVALID_VALUE,
1479 "glCopyBufferSubData(writeOffset + size = %d)",
1480 (int) (writeOffset + size));
1481 return;
1482 }
1483
1484 if (src == dst) {
1485 if (readOffset + size <= writeOffset) {
1486 /* OK */
1487 }
1488 else if (writeOffset + size <= readOffset) {
1489 /* OK */
1490 }
1491 else {
1492 /* overlapping src/dst is illegal */
1493 _mesa_error(ctx, GL_INVALID_VALUE,
1494 "glCopyBufferSubData(overlapping src/dst)");
1495 return;
1496 }
1497 }
1498
1499 ctx->Driver.CopyBufferSubData(ctx, src, dst, readOffset, writeOffset, size);
1500 }
1501
1502
1503 /**
1504 * See GL_ARB_map_buffer_range spec
1505 */
1506 void * GLAPIENTRY
_mesa_MapBufferRange(GLenum target,GLintptr offset,GLsizeiptr length,GLbitfield access)1507 _mesa_MapBufferRange(GLenum target, GLintptr offset, GLsizeiptr length,
1508 GLbitfield access)
1509 {
1510 GET_CURRENT_CONTEXT(ctx);
1511 struct gl_buffer_object *bufObj;
1512 void *map;
1513
1514 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
1515
1516 if (!ctx->Extensions.ARB_map_buffer_range) {
1517 _mesa_error(ctx, GL_INVALID_OPERATION,
1518 "glMapBufferRange(extension not supported)");
1519 return NULL;
1520 }
1521
1522 if (offset < 0) {
1523 _mesa_error(ctx, GL_INVALID_VALUE,
1524 "glMapBufferRange(offset = %ld)", (long)offset);
1525 return NULL;
1526 }
1527
1528 if (length < 0) {
1529 _mesa_error(ctx, GL_INVALID_VALUE,
1530 "glMapBufferRange(length = %ld)", (long)length);
1531 return NULL;
1532 }
1533
1534 if (access & ~(GL_MAP_READ_BIT |
1535 GL_MAP_WRITE_BIT |
1536 GL_MAP_INVALIDATE_RANGE_BIT |
1537 GL_MAP_INVALIDATE_BUFFER_BIT |
1538 GL_MAP_FLUSH_EXPLICIT_BIT |
1539 GL_MAP_UNSYNCHRONIZED_BIT)) {
1540 /* generate an error if any undefind bit is set */
1541 _mesa_error(ctx, GL_INVALID_VALUE, "glMapBufferRange(access)");
1542 return NULL;
1543 }
1544
1545 if ((access & (GL_MAP_READ_BIT | GL_MAP_WRITE_BIT)) == 0) {
1546 _mesa_error(ctx, GL_INVALID_OPERATION,
1547 "glMapBufferRange(access indicates neither read or write)");
1548 return NULL;
1549 }
1550
1551 if ((access & GL_MAP_READ_BIT) &&
1552 (access & (GL_MAP_INVALIDATE_RANGE_BIT |
1553 GL_MAP_INVALIDATE_BUFFER_BIT |
1554 GL_MAP_UNSYNCHRONIZED_BIT))) {
1555 _mesa_error(ctx, GL_INVALID_OPERATION,
1556 "glMapBufferRange(invalid access flags)");
1557 return NULL;
1558 }
1559
1560 if ((access & GL_MAP_FLUSH_EXPLICIT_BIT) &&
1561 ((access & GL_MAP_WRITE_BIT) == 0)) {
1562 _mesa_error(ctx, GL_INVALID_OPERATION,
1563 "glMapBufferRange(invalid access flags)");
1564 return NULL;
1565 }
1566
1567 bufObj = get_buffer(ctx, "glMapBufferRange", target);
1568 if (!bufObj)
1569 return NULL;
1570
1571 if (offset + length > bufObj->Size) {
1572 _mesa_error(ctx, GL_INVALID_VALUE,
1573 "glMapBufferRange(offset + length > size)");
1574 return NULL;
1575 }
1576
1577 if (_mesa_bufferobj_mapped(bufObj)) {
1578 _mesa_error(ctx, GL_INVALID_OPERATION,
1579 "glMapBufferRange(buffer already mapped)");
1580 return NULL;
1581 }
1582
1583 if (!bufObj->Size) {
1584 _mesa_error(ctx, GL_OUT_OF_MEMORY,
1585 "glMapBufferRange(buffer size = 0)");
1586 return NULL;
1587 }
1588
1589 /* Mapping zero bytes should return a non-null pointer. */
1590 if (!length) {
1591 static long dummy = 0;
1592 bufObj->Pointer = &dummy;
1593 bufObj->Length = length;
1594 bufObj->Offset = offset;
1595 bufObj->AccessFlags = access;
1596 return bufObj->Pointer;
1597 }
1598
1599 ASSERT(ctx->Driver.MapBufferRange);
1600 map = ctx->Driver.MapBufferRange(ctx, offset, length, access, bufObj);
1601 if (!map) {
1602 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glMapBufferARB(map failed)");
1603 }
1604 else {
1605 /* The driver callback should have set all these fields.
1606 * This is important because other modules (like VBO) might call
1607 * the driver function directly.
1608 */
1609 ASSERT(bufObj->Pointer == map);
1610 ASSERT(bufObj->Length == length);
1611 ASSERT(bufObj->Offset == offset);
1612 ASSERT(bufObj->AccessFlags == access);
1613 }
1614
1615 return map;
1616 }
1617
1618
1619 /**
1620 * See GL_ARB_map_buffer_range spec
1621 */
1622 void GLAPIENTRY
_mesa_FlushMappedBufferRange(GLenum target,GLintptr offset,GLsizeiptr length)1623 _mesa_FlushMappedBufferRange(GLenum target, GLintptr offset, GLsizeiptr length)
1624 {
1625 GET_CURRENT_CONTEXT(ctx);
1626 struct gl_buffer_object *bufObj;
1627 ASSERT_OUTSIDE_BEGIN_END(ctx);
1628
1629 if (!ctx->Extensions.ARB_map_buffer_range) {
1630 _mesa_error(ctx, GL_INVALID_OPERATION,
1631 "glFlushMappedBufferRange(extension not supported)");
1632 return;
1633 }
1634
1635 if (offset < 0) {
1636 _mesa_error(ctx, GL_INVALID_VALUE,
1637 "glFlushMappedBufferRange(offset = %ld)", (long)offset);
1638 return;
1639 }
1640
1641 if (length < 0) {
1642 _mesa_error(ctx, GL_INVALID_VALUE,
1643 "glFlushMappedBufferRange(length = %ld)", (long)length);
1644 return;
1645 }
1646
1647 bufObj = get_buffer(ctx, "glFlushMappedBufferRange", target);
1648 if (!bufObj)
1649 return;
1650
1651 if (!_mesa_bufferobj_mapped(bufObj)) {
1652 /* buffer is not mapped */
1653 _mesa_error(ctx, GL_INVALID_OPERATION,
1654 "glFlushMappedBufferRange(buffer is not mapped)");
1655 return;
1656 }
1657
1658 if ((bufObj->AccessFlags & GL_MAP_FLUSH_EXPLICIT_BIT) == 0) {
1659 _mesa_error(ctx, GL_INVALID_OPERATION,
1660 "glFlushMappedBufferRange(GL_MAP_FLUSH_EXPLICIT_BIT not set)");
1661 return;
1662 }
1663
1664 if (offset + length > bufObj->Length) {
1665 _mesa_error(ctx, GL_INVALID_VALUE,
1666 "glFlushMappedBufferRange(offset %ld + length %ld > mapped length %ld)",
1667 (long)offset, (long)length, (long)bufObj->Length);
1668 return;
1669 }
1670
1671 ASSERT(bufObj->AccessFlags & GL_MAP_WRITE_BIT);
1672
1673 if (ctx->Driver.FlushMappedBufferRange)
1674 ctx->Driver.FlushMappedBufferRange(ctx, offset, length, bufObj);
1675 }
1676
1677
1678 #if FEATURE_APPLE_object_purgeable
1679 static GLenum
buffer_object_purgeable(struct gl_context * ctx,GLuint name,GLenum option)1680 buffer_object_purgeable(struct gl_context *ctx, GLuint name, GLenum option)
1681 {
1682 struct gl_buffer_object *bufObj;
1683 GLenum retval;
1684
1685 bufObj = _mesa_lookup_bufferobj(ctx, name);
1686 if (!bufObj) {
1687 _mesa_error(ctx, GL_INVALID_VALUE,
1688 "glObjectPurgeable(name = 0x%x)", name);
1689 return 0;
1690 }
1691 if (!_mesa_is_bufferobj(bufObj)) {
1692 _mesa_error(ctx, GL_INVALID_OPERATION, "glObjectPurgeable(buffer 0)" );
1693 return 0;
1694 }
1695
1696 if (bufObj->Purgeable) {
1697 _mesa_error(ctx, GL_INVALID_OPERATION,
1698 "glObjectPurgeable(name = 0x%x) is already purgeable", name);
1699 return GL_VOLATILE_APPLE;
1700 }
1701
1702 bufObj->Purgeable = GL_TRUE;
1703
1704 retval = GL_VOLATILE_APPLE;
1705 if (ctx->Driver.BufferObjectPurgeable)
1706 retval = ctx->Driver.BufferObjectPurgeable(ctx, bufObj, option);
1707
1708 return retval;
1709 }
1710
1711
1712 static GLenum
renderbuffer_purgeable(struct gl_context * ctx,GLuint name,GLenum option)1713 renderbuffer_purgeable(struct gl_context *ctx, GLuint name, GLenum option)
1714 {
1715 struct gl_renderbuffer *bufObj;
1716 GLenum retval;
1717
1718 bufObj = _mesa_lookup_renderbuffer(ctx, name);
1719 if (!bufObj) {
1720 _mesa_error(ctx, GL_INVALID_VALUE,
1721 "glObjectUnpurgeable(name = 0x%x)", name);
1722 return 0;
1723 }
1724
1725 if (bufObj->Purgeable) {
1726 _mesa_error(ctx, GL_INVALID_OPERATION,
1727 "glObjectPurgeable(name = 0x%x) is already purgeable", name);
1728 return GL_VOLATILE_APPLE;
1729 }
1730
1731 bufObj->Purgeable = GL_TRUE;
1732
1733 retval = GL_VOLATILE_APPLE;
1734 if (ctx->Driver.RenderObjectPurgeable)
1735 retval = ctx->Driver.RenderObjectPurgeable(ctx, bufObj, option);
1736
1737 return retval;
1738 }
1739
1740
1741 static GLenum
texture_object_purgeable(struct gl_context * ctx,GLuint name,GLenum option)1742 texture_object_purgeable(struct gl_context *ctx, GLuint name, GLenum option)
1743 {
1744 struct gl_texture_object *bufObj;
1745 GLenum retval;
1746
1747 bufObj = _mesa_lookup_texture(ctx, name);
1748 if (!bufObj) {
1749 _mesa_error(ctx, GL_INVALID_VALUE,
1750 "glObjectPurgeable(name = 0x%x)", name);
1751 return 0;
1752 }
1753
1754 if (bufObj->Purgeable) {
1755 _mesa_error(ctx, GL_INVALID_OPERATION,
1756 "glObjectPurgeable(name = 0x%x) is already purgeable", name);
1757 return GL_VOLATILE_APPLE;
1758 }
1759
1760 bufObj->Purgeable = GL_TRUE;
1761
1762 retval = GL_VOLATILE_APPLE;
1763 if (ctx->Driver.TextureObjectPurgeable)
1764 retval = ctx->Driver.TextureObjectPurgeable(ctx, bufObj, option);
1765
1766 return retval;
1767 }
1768
1769
1770 GLenum GLAPIENTRY
_mesa_ObjectPurgeableAPPLE(GLenum objectType,GLuint name,GLenum option)1771 _mesa_ObjectPurgeableAPPLE(GLenum objectType, GLuint name, GLenum option)
1772 {
1773 GLenum retval;
1774
1775 GET_CURRENT_CONTEXT(ctx);
1776 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
1777
1778 if (name == 0) {
1779 _mesa_error(ctx, GL_INVALID_VALUE,
1780 "glObjectPurgeable(name = 0x%x)", name);
1781 return 0;
1782 }
1783
1784 switch (option) {
1785 case GL_VOLATILE_APPLE:
1786 case GL_RELEASED_APPLE:
1787 /* legal */
1788 break;
1789 default:
1790 _mesa_error(ctx, GL_INVALID_ENUM,
1791 "glObjectPurgeable(name = 0x%x) invalid option: %d",
1792 name, option);
1793 return 0;
1794 }
1795
1796 switch (objectType) {
1797 case GL_TEXTURE:
1798 retval = texture_object_purgeable(ctx, name, option);
1799 break;
1800 case GL_RENDERBUFFER_EXT:
1801 retval = renderbuffer_purgeable(ctx, name, option);
1802 break;
1803 case GL_BUFFER_OBJECT_APPLE:
1804 retval = buffer_object_purgeable(ctx, name, option);
1805 break;
1806 default:
1807 _mesa_error(ctx, GL_INVALID_ENUM,
1808 "glObjectPurgeable(name = 0x%x) invalid type: %d",
1809 name, objectType);
1810 return 0;
1811 }
1812
1813 /* In strict conformance to the spec, we must only return VOLATILE when
1814 * when passed the VOLATILE option. Madness.
1815 *
1816 * XXX First fix the spec, then fix me.
1817 */
1818 return option == GL_VOLATILE_APPLE ? GL_VOLATILE_APPLE : retval;
1819 }
1820
1821
1822 static GLenum
buffer_object_unpurgeable(struct gl_context * ctx,GLuint name,GLenum option)1823 buffer_object_unpurgeable(struct gl_context *ctx, GLuint name, GLenum option)
1824 {
1825 struct gl_buffer_object *bufObj;
1826 GLenum retval;
1827
1828 bufObj = _mesa_lookup_bufferobj(ctx, name);
1829 if (!bufObj) {
1830 _mesa_error(ctx, GL_INVALID_VALUE,
1831 "glObjectUnpurgeable(name = 0x%x)", name);
1832 return 0;
1833 }
1834
1835 if (! bufObj->Purgeable) {
1836 _mesa_error(ctx, GL_INVALID_OPERATION,
1837 "glObjectUnpurgeable(name = 0x%x) object is "
1838 " already \"unpurged\"", name);
1839 return 0;
1840 }
1841
1842 bufObj->Purgeable = GL_FALSE;
1843
1844 retval = option;
1845 if (ctx->Driver.BufferObjectUnpurgeable)
1846 retval = ctx->Driver.BufferObjectUnpurgeable(ctx, bufObj, option);
1847
1848 return retval;
1849 }
1850
1851
1852 static GLenum
renderbuffer_unpurgeable(struct gl_context * ctx,GLuint name,GLenum option)1853 renderbuffer_unpurgeable(struct gl_context *ctx, GLuint name, GLenum option)
1854 {
1855 struct gl_renderbuffer *bufObj;
1856 GLenum retval;
1857
1858 bufObj = _mesa_lookup_renderbuffer(ctx, name);
1859 if (!bufObj) {
1860 _mesa_error(ctx, GL_INVALID_VALUE,
1861 "glObjectUnpurgeable(name = 0x%x)", name);
1862 return 0;
1863 }
1864
1865 if (! bufObj->Purgeable) {
1866 _mesa_error(ctx, GL_INVALID_OPERATION,
1867 "glObjectUnpurgeable(name = 0x%x) object is "
1868 " already \"unpurged\"", name);
1869 return 0;
1870 }
1871
1872 bufObj->Purgeable = GL_FALSE;
1873
1874 retval = option;
1875 if (ctx->Driver.RenderObjectUnpurgeable)
1876 retval = ctx->Driver.RenderObjectUnpurgeable(ctx, bufObj, option);
1877
1878 return retval;
1879 }
1880
1881
1882 static GLenum
texture_object_unpurgeable(struct gl_context * ctx,GLuint name,GLenum option)1883 texture_object_unpurgeable(struct gl_context *ctx, GLuint name, GLenum option)
1884 {
1885 struct gl_texture_object *bufObj;
1886 GLenum retval;
1887
1888 bufObj = _mesa_lookup_texture(ctx, name);
1889 if (!bufObj) {
1890 _mesa_error(ctx, GL_INVALID_VALUE,
1891 "glObjectUnpurgeable(name = 0x%x)", name);
1892 return 0;
1893 }
1894
1895 if (! bufObj->Purgeable) {
1896 _mesa_error(ctx, GL_INVALID_OPERATION,
1897 "glObjectUnpurgeable(name = 0x%x) object is"
1898 " already \"unpurged\"", name);
1899 return 0;
1900 }
1901
1902 bufObj->Purgeable = GL_FALSE;
1903
1904 retval = option;
1905 if (ctx->Driver.TextureObjectUnpurgeable)
1906 retval = ctx->Driver.TextureObjectUnpurgeable(ctx, bufObj, option);
1907
1908 return retval;
1909 }
1910
1911
1912 GLenum GLAPIENTRY
_mesa_ObjectUnpurgeableAPPLE(GLenum objectType,GLuint name,GLenum option)1913 _mesa_ObjectUnpurgeableAPPLE(GLenum objectType, GLuint name, GLenum option)
1914 {
1915 GET_CURRENT_CONTEXT(ctx);
1916 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
1917
1918 if (name == 0) {
1919 _mesa_error(ctx, GL_INVALID_VALUE,
1920 "glObjectUnpurgeable(name = 0x%x)", name);
1921 return 0;
1922 }
1923
1924 switch (option) {
1925 case GL_RETAINED_APPLE:
1926 case GL_UNDEFINED_APPLE:
1927 /* legal */
1928 break;
1929 default:
1930 _mesa_error(ctx, GL_INVALID_ENUM,
1931 "glObjectUnpurgeable(name = 0x%x) invalid option: %d",
1932 name, option);
1933 return 0;
1934 }
1935
1936 switch (objectType) {
1937 case GL_BUFFER_OBJECT_APPLE:
1938 return buffer_object_unpurgeable(ctx, name, option);
1939 case GL_TEXTURE:
1940 return texture_object_unpurgeable(ctx, name, option);
1941 case GL_RENDERBUFFER_EXT:
1942 return renderbuffer_unpurgeable(ctx, name, option);
1943 default:
1944 _mesa_error(ctx, GL_INVALID_ENUM,
1945 "glObjectUnpurgeable(name = 0x%x) invalid type: %d",
1946 name, objectType);
1947 return 0;
1948 }
1949 }
1950
1951
1952 static void
get_buffer_object_parameteriv(struct gl_context * ctx,GLuint name,GLenum pname,GLint * params)1953 get_buffer_object_parameteriv(struct gl_context *ctx, GLuint name,
1954 GLenum pname, GLint *params)
1955 {
1956 struct gl_buffer_object *bufObj = _mesa_lookup_bufferobj(ctx, name);
1957 if (!bufObj) {
1958 _mesa_error(ctx, GL_INVALID_VALUE,
1959 "glGetObjectParameteriv(name = 0x%x) invalid object", name);
1960 return;
1961 }
1962
1963 switch (pname) {
1964 case GL_PURGEABLE_APPLE:
1965 *params = bufObj->Purgeable;
1966 break;
1967 default:
1968 _mesa_error(ctx, GL_INVALID_ENUM,
1969 "glGetObjectParameteriv(name = 0x%x) invalid enum: %d",
1970 name, pname);
1971 break;
1972 }
1973 }
1974
1975
1976 static void
get_renderbuffer_parameteriv(struct gl_context * ctx,GLuint name,GLenum pname,GLint * params)1977 get_renderbuffer_parameteriv(struct gl_context *ctx, GLuint name,
1978 GLenum pname, GLint *params)
1979 {
1980 struct gl_renderbuffer *rb = _mesa_lookup_renderbuffer(ctx, name);
1981 if (!rb) {
1982 _mesa_error(ctx, GL_INVALID_VALUE,
1983 "glObjectUnpurgeable(name = 0x%x)", name);
1984 return;
1985 }
1986
1987 switch (pname) {
1988 case GL_PURGEABLE_APPLE:
1989 *params = rb->Purgeable;
1990 break;
1991 default:
1992 _mesa_error(ctx, GL_INVALID_ENUM,
1993 "glGetObjectParameteriv(name = 0x%x) invalid enum: %d",
1994 name, pname);
1995 break;
1996 }
1997 }
1998
1999
2000 static void
get_texture_object_parameteriv(struct gl_context * ctx,GLuint name,GLenum pname,GLint * params)2001 get_texture_object_parameteriv(struct gl_context *ctx, GLuint name,
2002 GLenum pname, GLint *params)
2003 {
2004 struct gl_texture_object *texObj = _mesa_lookup_texture(ctx, name);
2005 if (!texObj) {
2006 _mesa_error(ctx, GL_INVALID_VALUE,
2007 "glObjectUnpurgeable(name = 0x%x)", name);
2008 return;
2009 }
2010
2011 switch (pname) {
2012 case GL_PURGEABLE_APPLE:
2013 *params = texObj->Purgeable;
2014 break;
2015 default:
2016 _mesa_error(ctx, GL_INVALID_ENUM,
2017 "glGetObjectParameteriv(name = 0x%x) invalid enum: %d",
2018 name, pname);
2019 break;
2020 }
2021 }
2022
2023
2024 void GLAPIENTRY
_mesa_GetObjectParameterivAPPLE(GLenum objectType,GLuint name,GLenum pname,GLint * params)2025 _mesa_GetObjectParameterivAPPLE(GLenum objectType, GLuint name, GLenum pname,
2026 GLint *params)
2027 {
2028 GET_CURRENT_CONTEXT(ctx);
2029
2030 if (name == 0) {
2031 _mesa_error(ctx, GL_INVALID_VALUE,
2032 "glGetObjectParameteriv(name = 0x%x)", name);
2033 return;
2034 }
2035
2036 switch (objectType) {
2037 case GL_TEXTURE:
2038 get_texture_object_parameteriv(ctx, name, pname, params);
2039 break;
2040 case GL_BUFFER_OBJECT_APPLE:
2041 get_buffer_object_parameteriv(ctx, name, pname, params);
2042 break;
2043 case GL_RENDERBUFFER_EXT:
2044 get_renderbuffer_parameteriv(ctx, name, pname, params);
2045 break;
2046 default:
2047 _mesa_error(ctx, GL_INVALID_ENUM,
2048 "glGetObjectParameteriv(name = 0x%x) invalid type: %d",
2049 name, objectType);
2050 }
2051 }
2052
2053 #endif /* FEATURE_APPLE_object_purgeable */
2054
2055 static void
set_ubo_binding(struct gl_context * ctx,int index,struct gl_buffer_object * bufObj,GLintptr offset,GLsizeiptr size,GLboolean autoSize)2056 set_ubo_binding(struct gl_context *ctx,
2057 int index,
2058 struct gl_buffer_object *bufObj,
2059 GLintptr offset,
2060 GLsizeiptr size,
2061 GLboolean autoSize)
2062 {
2063 struct gl_uniform_buffer_binding *binding;
2064
2065 binding = &ctx->UniformBufferBindings[index];
2066 if (binding->BufferObject == bufObj &&
2067 binding->Offset == offset &&
2068 binding->Size == size &&
2069 binding->AutomaticSize == autoSize) {
2070 return;
2071 }
2072
2073 FLUSH_VERTICES(ctx, _NEW_BUFFER_OBJECT);
2074
2075 _mesa_reference_buffer_object(ctx, &binding->BufferObject, bufObj);
2076 binding->Offset = offset;
2077 binding->Size = size;
2078 binding->AutomaticSize = autoSize;
2079 }
2080
2081 /**
2082 * Bind a region of a buffer object to a uniform block binding point.
2083 * \param index the uniform buffer binding point index
2084 * \param bufObj the buffer object
2085 * \param offset offset to the start of buffer object region
2086 * \param size size of the buffer object region
2087 */
2088 static void
bind_buffer_range_uniform_buffer(struct gl_context * ctx,GLuint index,struct gl_buffer_object * bufObj,GLintptr offset,GLsizeiptr size)2089 bind_buffer_range_uniform_buffer(struct gl_context *ctx,
2090 GLuint index,
2091 struct gl_buffer_object *bufObj,
2092 GLintptr offset,
2093 GLsizeiptr size)
2094 {
2095 if (index >= ctx->Const.MaxUniformBufferBindings) {
2096 _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferRange(index=%d)", index);
2097 return;
2098 }
2099
2100 if (offset & (ctx->Const.UniformBufferOffsetAlignment - 1)) {
2101 _mesa_error(ctx, GL_INVALID_VALUE,
2102 "glBindBufferRange(offset misalgned %d/%d)", (int) offset,
2103 ctx->Const.UniformBufferOffsetAlignment);
2104 return;
2105 }
2106
2107 if (bufObj == ctx->Shared->NullBufferObj) {
2108 offset = -1;
2109 size = -1;
2110 }
2111
2112 _mesa_reference_buffer_object(ctx, &ctx->UniformBuffer, bufObj);
2113 set_ubo_binding(ctx, index, bufObj, offset, size, GL_FALSE);
2114 }
2115
2116
2117 /**
2118 * Bind a buffer object to a uniform block binding point.
2119 * As above, but offset = 0.
2120 */
2121 static void
bind_buffer_base_uniform_buffer(struct gl_context * ctx,GLuint index,struct gl_buffer_object * bufObj)2122 bind_buffer_base_uniform_buffer(struct gl_context *ctx,
2123 GLuint index,
2124 struct gl_buffer_object *bufObj)
2125 {
2126 if (index >= ctx->Const.MaxUniformBufferBindings) {
2127 _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferBase(index=%d)", index);
2128 return;
2129 }
2130
2131 _mesa_reference_buffer_object(ctx, &ctx->UniformBuffer, bufObj);
2132 if (bufObj == ctx->Shared->NullBufferObj)
2133 set_ubo_binding(ctx, index, bufObj, -1, -1, GL_TRUE);
2134 else
2135 set_ubo_binding(ctx, index, bufObj, 0, 0, GL_TRUE);
2136 }
2137
2138 void GLAPIENTRY
_mesa_BindBufferRange(GLenum target,GLuint index,GLuint buffer,GLintptr offset,GLsizeiptr size)2139 _mesa_BindBufferRange(GLenum target, GLuint index,
2140 GLuint buffer, GLintptr offset, GLsizeiptr size)
2141 {
2142 GET_CURRENT_CONTEXT(ctx);
2143 struct gl_buffer_object *bufObj;
2144
2145 if (buffer == 0) {
2146 bufObj = ctx->Shared->NullBufferObj;
2147 } else {
2148 bufObj = _mesa_lookup_bufferobj(ctx, buffer);
2149 }
2150 if (!handle_bind_buffer_gen(ctx, target, buffer, &bufObj))
2151 return;
2152
2153 if (!bufObj) {
2154 _mesa_error(ctx, GL_INVALID_OPERATION,
2155 "glBindBufferRange(invalid buffer=%u)", buffer);
2156 return;
2157 }
2158
2159 if (size <= 0) {
2160 _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferRange(size=%d)",
2161 (int) size);
2162 return;
2163 }
2164
2165 if (offset + size > bufObj->Size) {
2166 _mesa_error(ctx, GL_INVALID_VALUE,
2167 "glBindBufferRange(offset + size %d > buffer size %d)",
2168 (int) (offset + size), (int) (bufObj->Size));
2169 return;
2170 }
2171
2172 switch (target) {
2173 case GL_TRANSFORM_FEEDBACK_BUFFER:
2174 _mesa_bind_buffer_range_transform_feedback(ctx, index, bufObj,
2175 offset, size);
2176 return;
2177 case GL_UNIFORM_BUFFER:
2178 bind_buffer_range_uniform_buffer(ctx, index, bufObj, offset, size);
2179 return;
2180 default:
2181 _mesa_error(ctx, GL_INVALID_ENUM, "glBindBufferRange(target)");
2182 return;
2183 }
2184 }
2185
2186 void GLAPIENTRY
_mesa_BindBufferBase(GLenum target,GLuint index,GLuint buffer)2187 _mesa_BindBufferBase(GLenum target, GLuint index, GLuint buffer)
2188 {
2189 GET_CURRENT_CONTEXT(ctx);
2190 struct gl_buffer_object *bufObj;
2191
2192 if (buffer == 0) {
2193 bufObj = ctx->Shared->NullBufferObj;
2194 } else {
2195 bufObj = _mesa_lookup_bufferobj(ctx, buffer);
2196 }
2197 if (!handle_bind_buffer_gen(ctx, target, buffer, &bufObj))
2198 return;
2199
2200 if (!bufObj) {
2201 _mesa_error(ctx, GL_INVALID_OPERATION,
2202 "glBindBufferBase(invalid buffer=%u)", buffer);
2203 return;
2204 }
2205
2206 /* Note that there's some oddness in the GL 3.1-GL 3.3 specifications with
2207 * regards to BindBufferBase. It says (GL 3.1 core spec, page 63):
2208 *
2209 * "BindBufferBase is equivalent to calling BindBufferRange with offset
2210 * zero and size equal to the size of buffer."
2211 *
2212 * but it says for glGetIntegeri_v (GL 3.1 core spec, page 230):
2213 *
2214 * "If the parameter (starting offset or size) was not specified when the
2215 * buffer object was bound, zero is returned."
2216 *
2217 * What happens if the size of the buffer changes? Does the size of the
2218 * buffer at the moment glBindBufferBase was called still play a role, like
2219 * the first quote would imply, or is the size meaningless in the
2220 * glBindBufferBase case like the second quote would suggest? The GL 4.1
2221 * core spec page 45 says:
2222 *
2223 * "It is equivalent to calling BindBufferRange with offset zero, while
2224 * size is determined by the size of the bound buffer at the time the
2225 * binding is used."
2226 *
2227 * My interpretation is that the GL 4.1 spec was a clarification of the
2228 * behavior, not a change. In particular, this choice will only make
2229 * rendering work in cases where it would have had undefined results.
2230 */
2231
2232 switch (target) {
2233 case GL_TRANSFORM_FEEDBACK_BUFFER:
2234 _mesa_bind_buffer_base_transform_feedback(ctx, index, bufObj);
2235 return;
2236 case GL_UNIFORM_BUFFER:
2237 bind_buffer_base_uniform_buffer(ctx, index, bufObj);
2238 return;
2239 default:
2240 _mesa_error(ctx, GL_INVALID_ENUM, "glBindBufferBase(target)");
2241 return;
2242 }
2243 }
2244
2245 static void GLAPIENTRY
_mesa_InvalidateBufferSubData(GLuint buffer,GLintptr offset,GLsizeiptr length)2246 _mesa_InvalidateBufferSubData(GLuint buffer, GLintptr offset,
2247 GLsizeiptr length)
2248 {
2249 GET_CURRENT_CONTEXT(ctx);
2250 struct gl_buffer_object *bufObj;
2251 const GLintptr end = offset + length;
2252
2253 bufObj = _mesa_lookup_bufferobj(ctx, buffer);
2254 if (!bufObj) {
2255 _mesa_error(ctx, GL_INVALID_VALUE,
2256 "glInvalidateBufferSubData(name = 0x%x) invalid object",
2257 buffer);
2258 return;
2259 }
2260
2261 /* The GL_ARB_invalidate_subdata spec says:
2262 *
2263 * "An INVALID_VALUE error is generated if <offset> or <length> is
2264 * negative, or if <offset> + <length> is greater than the value of
2265 * BUFFER_SIZE."
2266 */
2267 if (end < 0 || end > bufObj->Size) {
2268 _mesa_error(ctx, GL_INVALID_VALUE,
2269 "glInvalidateBufferSubData(invalid offset or length)");
2270 return;
2271 }
2272
2273 /* The GL_ARB_invalidate_subdata spec says:
2274 *
2275 * "An INVALID_OPERATION error is generated if the buffer is currently
2276 * mapped by MapBuffer, or if the invalidate range intersects the range
2277 * currently mapped by MapBufferRange."
2278 */
2279 if (_mesa_bufferobj_mapped(bufObj)) {
2280 const GLintptr mapEnd = bufObj->Offset + bufObj->Length;
2281
2282 /* The regions do not overlap if and only if the end of the discard
2283 * region is before the mapped region or the start of the discard region
2284 * is after the mapped region.
2285 *
2286 * Note that 'end' and 'mapEnd' are the first byte *after* the discard
2287 * region and the mapped region, repsectively. It is okay for that byte
2288 * to be mapped (for 'end') or discarded (for 'mapEnd').
2289 */
2290 if (!(end <= bufObj->Offset || offset >= mapEnd)) {
2291 _mesa_error(ctx, GL_INVALID_OPERATION,
2292 "glInvalidateBufferSubData(intersection with mapped "
2293 "range)");
2294 return;
2295 }
2296 }
2297
2298 /* We don't actually do anything for this yet. Just return after
2299 * validating the parameters and generating the required errors.
2300 */
2301 return;
2302 }
2303
2304 static void GLAPIENTRY
_mesa_InvalidateBufferData(GLuint buffer)2305 _mesa_InvalidateBufferData(GLuint buffer)
2306 {
2307 GET_CURRENT_CONTEXT(ctx);
2308 struct gl_buffer_object *bufObj;
2309
2310 bufObj = _mesa_lookup_bufferobj(ctx, buffer);
2311 if (!bufObj) {
2312 _mesa_error(ctx, GL_INVALID_VALUE,
2313 "glInvalidateBufferData(name = 0x%x) invalid object",
2314 buffer);
2315 return;
2316 }
2317
2318 /* The GL_ARB_invalidate_subdata spec says:
2319 *
2320 * "An INVALID_OPERATION error is generated if the buffer is currently
2321 * mapped by MapBuffer, or if the invalidate range intersects the range
2322 * currently mapped by MapBufferRange."
2323 */
2324 if (_mesa_bufferobj_mapped(bufObj)) {
2325 _mesa_error(ctx, GL_INVALID_OPERATION,
2326 "glInvalidateBufferData(intersection with mapped "
2327 "range)");
2328 return;
2329 }
2330
2331 /* We don't actually do anything for this yet. Just return after
2332 * validating the parameters and generating the required errors.
2333 */
2334 return;
2335 }
2336
2337 void
_mesa_init_bufferobj_dispatch(struct gl_context * ctx,struct _glapi_table * disp)2338 _mesa_init_bufferobj_dispatch(struct gl_context *ctx, struct _glapi_table *disp)
2339 {
2340 SET_BindBufferARB(disp, _mesa_BindBufferARB);
2341 SET_BufferDataARB(disp, _mesa_BufferDataARB);
2342 SET_BufferSubDataARB(disp, _mesa_BufferSubDataARB);
2343 SET_DeleteBuffersARB(disp, _mesa_DeleteBuffersARB);
2344 SET_GenBuffersARB(disp, _mesa_GenBuffersARB);
2345 SET_GetBufferParameterivARB(disp, _mesa_GetBufferParameterivARB);
2346 SET_GetBufferPointervARB(disp, _mesa_GetBufferPointervARB);
2347 if (ctx->API != API_OPENGLES2) {
2348 SET_GetBufferSubDataARB(disp, _mesa_GetBufferSubDataARB);
2349 }
2350 SET_IsBufferARB(disp, _mesa_IsBufferARB);
2351 SET_MapBufferARB(disp, _mesa_MapBufferARB);
2352 SET_UnmapBufferARB(disp, _mesa_UnmapBufferARB);
2353
2354 if (_mesa_is_desktop_gl(ctx) || _mesa_is_gles3(ctx)) {
2355 SET_BindBufferRangeEXT(disp, _mesa_BindBufferRange);
2356 SET_BindBufferBaseEXT(disp, _mesa_BindBufferBase);
2357 }
2358
2359 if (_mesa_is_desktop_gl(ctx)) {
2360 SET_InvalidateBufferData(disp, _mesa_InvalidateBufferData);
2361 SET_InvalidateBufferSubData(disp, _mesa_InvalidateBufferSubData);
2362 }
2363 }
2364