2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2003 Brian Paul All Rights Reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28 * \brief Functions for the GL_ARB_vertex_buffer_object extension.
29 * \author Brian Paul, Ian Romanick
37 #include "bufferobj.h"
41 * Get the buffer object bound to the specified target in a GL context.
43 * \param ctx GL context
44 * \param target Buffer object target to be retrieved. Currently this must
45 * be either \c GL_ARRAY_BUFFER or \c GL_ELEMENT_ARRAY_BUFFER.
46 * \param str Name of caller for logging errors.
47 * \return A pointer to the buffer object bound to \c target in the
48 * specified context or \c NULL if \c target is invalid or no
49 * buffer object is bound.
51 static INLINE
struct gl_buffer_object
*
52 buffer_object_get_target( GLcontext
*ctx
, GLenum target
, const char * str
)
54 struct gl_buffer_object
* bufObj
= NULL
;
57 case GL_ARRAY_BUFFER_ARB
:
58 bufObj
= ctx
->Array
.ArrayBufferObj
;
60 case GL_ELEMENT_ARRAY_BUFFER_ARB
:
61 bufObj
= ctx
->Array
.ElementArrayBufferObj
;
64 _mesa_error(ctx
, GL_INVALID_ENUM
, "gl%s(target)", str
);
68 if (bufObj
->Name
== 0)
76 * Tests the subdata range parameters and sets the GL error code for
77 * \c glBufferSubDataARB and \c glGetBufferSubDataARB.
79 * \param ctx GL context.
80 * \param target Buffer object target on which to operate.
81 * \param offset Offset of the first byte of the subdata range.
82 * \param size Size, in bytes, of the subdata range.
83 * \param str Name of caller for logging errors.
84 * \return A pointer to the buffer object bound to \c target in the
85 * specified context or \c NULL if any of the parameter or state
86 * conditions for \c glBufferSubDataARB or \c glGetBufferSubDataARB
89 * \sa glBufferSubDataARB, glGetBufferSubDataARB
91 static struct gl_buffer_object
*
92 buffer_object_subdata_range_good( GLcontext
* ctx
, GLenum target
,
93 GLintptrARB offset
, GLsizeiptrARB size
,
96 struct gl_buffer_object
*bufObj
;
99 _mesa_error(ctx
, GL_INVALID_VALUE
, "%s(size < 0)", str
);
104 _mesa_error(ctx
, GL_INVALID_VALUE
, "%s(offset < 0)", str
);
108 bufObj
= buffer_object_get_target( ctx
, target
, str
);
109 if ( bufObj
== NULL
) {
113 if ( (GLuint
)(offset
+ size
) > bufObj
->Size
) {
114 _mesa_error(ctx
, GL_INVALID_VALUE
,
115 "%s(size + offset > buffer size)", str
);
119 if ( bufObj
->Pointer
!= NULL
) {
120 _mesa_error(ctx
, GL_INVALID_OPERATION
, "%s", str
);
129 * Allocate and initialize a new buffer object.
131 * This function is intended to be called via
132 * \c dd_function_table::NewBufferObject.
134 struct gl_buffer_object
*
135 _mesa_new_buffer_object( GLcontext
*ctx
, GLuint name
, GLenum target
)
137 struct gl_buffer_object
*obj
;
138 obj
= MALLOC_STRUCT(gl_buffer_object
);
139 _mesa_initialize_buffer_object(obj
, name
, target
);
145 * Delete a buffer object.
147 * This function is intended to be called via
148 * \c dd_function_table::DeleteBufferObject.
151 _mesa_delete_buffer_object( GLcontext
*ctx
, struct gl_buffer_object
*bufObj
)
154 _mesa_free(bufObj
->Data
);
160 * Initialize a buffer object to default values.
163 _mesa_initialize_buffer_object( struct gl_buffer_object
*obj
,
164 GLuint name
, GLenum target
)
166 _mesa_bzero(obj
, sizeof(struct gl_buffer_object
));
173 * Add the given buffer object to the buffer object pool.
176 _mesa_save_buffer_object( GLcontext
*ctx
, struct gl_buffer_object
*obj
)
179 /* insert into hash table */
180 _mesa_HashInsert(ctx
->Shared
->BufferObjects
, obj
->Name
, obj
);
186 * Remove the given buffer object from the buffer object pool.
187 * Do not deallocate the buffer object though.
190 _mesa_remove_buffer_object( GLcontext
*ctx
, struct gl_buffer_object
*bufObj
)
192 if (bufObj
->Name
> 0) {
193 /* remove from hash table */
194 _mesa_HashRemove(ctx
->Shared
->BufferObjects
, bufObj
->Name
);
200 * Allocate space for and store data in a buffer object. Any data that was
201 * previously stored in the buffer object is lost. If \c data is \c NULL,
202 * memory will be allocated, but no copy will occur.
204 * This function is intended to be called via
205 * \c dd_function_table::BufferData. This function need not set GL error
206 * codes. The input parameters will have been tested before calling.
208 * \param ctx GL context.
209 * \param target Buffer object target on which to operate.
210 * \param size Size, in bytes, of the new data store.
211 * \param data Pointer to the data to store in the buffer object. This
212 * pointer may be \c NULL.
213 * \param usage Hints about how the data will be used.
214 * \param bufObj Object to be used.
216 * \sa glBufferDataARB, dd_function_table::BufferData.
219 _mesa_buffer_data( GLcontext
*ctx
, GLenum target
, GLsizeiptrARB size
,
220 const GLvoid
* data
, GLenum usage
,
221 struct gl_buffer_object
* bufObj
)
227 new_data
= _mesa_realloc( bufObj
->Data
, bufObj
->Size
, size
);
228 if ( new_data
!= NULL
) {
229 bufObj
->Data
= (GLubyte
*) new_data
;
231 bufObj
->Usage
= usage
;
233 if ( data
!= NULL
) {
234 _mesa_memcpy( bufObj
->Data
, data
, size
);
241 * Replace data in a subrange of buffer object. If the data range
242 * specified by \c size + \c offset extends beyond the end of the buffer or
243 * if \c data is \c NULL, no copy is performed.
245 * This function is intended to be called by
246 * \c dd_function_table::BufferSubData. This function need not set GL error
247 * codes. The input parameters will have been tested before calling.
249 * \param ctx GL context.
250 * \param target Buffer object target on which to operate.
251 * \param offset Offset of the first byte to be modified.
252 * \param size Size, in bytes, of the data range.
253 * \param data Pointer to the data to store in the buffer object.
254 * \param bufObj Object to be used.
256 * \sa glBufferSubDataARB, dd_function_table::BufferSubData.
259 _mesa_buffer_subdata( GLcontext
*ctx
, GLenum target
, GLintptrARB offset
,
260 GLsizeiptrARB size
, const GLvoid
* data
,
261 struct gl_buffer_object
* bufObj
)
263 if ( (bufObj
->Data
!= NULL
)
264 && ((GLuint
)(size
+ offset
) <= bufObj
->Size
) ) {
265 _mesa_memcpy( (GLubyte
*) bufObj
->Data
+ offset
, data
, size
);
271 * Retrieve data from a subrange of buffer object. If the data range
272 * specified by \c size + \c offset extends beyond the end of the buffer or
273 * if \c data is \c NULL, no copy is performed.
275 * This function is intended to be called by
276 * \c dd_function_table::BufferGetSubData. This function need not set GL error
277 * codes. The input parameters will have been tested before calling.
279 * \param ctx GL context.
280 * \param target Buffer object target on which to operate.
281 * \param offset Offset of the first byte to be modified.
282 * \param size Size, in bytes, of the data range.
283 * \param data Pointer to the data to store in the buffer object.
284 * \param bufObj Object to be used.
286 * \sa glBufferGetSubDataARB, dd_function_table::GetBufferSubData.
289 _mesa_buffer_get_subdata( GLcontext
*ctx
, GLenum target
, GLintptrARB offset
,
290 GLsizeiptrARB size
, GLvoid
* data
,
291 struct gl_buffer_object
* bufObj
)
293 if ( (bufObj
->Data
!= NULL
)
294 && ((GLuint
)(size
+ offset
) <= bufObj
->Size
) ) {
295 _mesa_memcpy( data
, (GLubyte
*) bufObj
->Data
+ offset
, size
);
301 * Maps the private data buffer into the processor's address space.
303 * This function is intended to be called by \c dd_function_table::MapBuffer.
304 * This function need not set GL error codes. The input parameters will have
305 * been tested before calling.
307 * \param ctx GL context.
308 * \param target Buffer object target on which to operate.
309 * \param access Information about how the buffer will be accessed.
310 * \param bufObj Object to be used.
311 * \return A pointer to the object's internal data store that can be accessed
314 * \sa glMapBufferARB, dd_function_table::MapBuffer
317 _mesa_buffer_map( GLcontext
*ctx
, GLenum target
, GLenum access
,
318 struct gl_buffer_object
* bufObj
)
325 * Initialize the state associated with buffer objects
328 _mesa_init_buffer_objects( GLcontext
*ctx
)
332 ctx
->Array
.NullBufferObj
= _mesa_new_buffer_object(ctx
, 0, 0);
333 ctx
->Array
.ArrayBufferObj
= ctx
->Array
.NullBufferObj
;
334 ctx
->Array
.ElementArrayBufferObj
= ctx
->Array
.NullBufferObj
;
336 /* Vertex array buffers */
337 ctx
->Array
.Vertex
.BufferObj
= ctx
->Array
.NullBufferObj
;
338 ctx
->Array
.Normal
.BufferObj
= ctx
->Array
.NullBufferObj
;
339 ctx
->Array
.Color
.BufferObj
= ctx
->Array
.NullBufferObj
;
340 ctx
->Array
.SecondaryColor
.BufferObj
= ctx
->Array
.NullBufferObj
;
341 ctx
->Array
.FogCoord
.BufferObj
= ctx
->Array
.NullBufferObj
;
342 ctx
->Array
.Index
.BufferObj
= ctx
->Array
.NullBufferObj
;
343 for (i
= 0; i
< MAX_TEXTURE_UNITS
; i
++) {
344 ctx
->Array
.TexCoord
[i
].BufferObj
= ctx
->Array
.NullBufferObj
;
346 ctx
->Array
.EdgeFlag
.BufferObj
= ctx
->Array
.NullBufferObj
;
347 for (i
= 0; i
< VERT_ATTRIB_MAX
; i
++) {
348 ctx
->Array
.VertexAttrib
[i
].BufferObj
= ctx
->Array
.NullBufferObj
;
354 /**********************************************************************/
356 /**********************************************************************/
359 _mesa_BindBufferARB(GLenum target
, GLuint buffer
)
361 GET_CURRENT_CONTEXT(ctx
);
362 struct gl_buffer_object
*oldBufObj
;
363 struct gl_buffer_object
*newBufObj
= 0;
364 ASSERT_OUTSIDE_BEGIN_END(ctx
);
366 oldBufObj
= buffer_object_get_target( ctx
, target
, "BindBufferARB" );
367 if ( (oldBufObj
!= NULL
) && (oldBufObj
->Name
== buffer
) )
368 return; /* rebinding the same buffer object- no change */
371 * Get pointer to new buffer object (newBufObj)
374 /* The spec says there's not a buffer object named 0, but we use
375 * one internally because it simplifies things.
377 newBufObj
= ctx
->Array
.NullBufferObj
;
380 /* non-default buffer object */
381 const struct _mesa_HashTable
*hash
= ctx
->Shared
->BufferObjects
;
382 newBufObj
= (struct gl_buffer_object
*) _mesa_HashLookup(hash
, buffer
);
384 /* if this is a new buffer object id, allocate a buffer object now */
385 newBufObj
= (*ctx
->Driver
.NewBufferObject
)(ctx
, buffer
, target
);
387 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glBindBufferARB");
390 _mesa_save_buffer_object(ctx
, newBufObj
);
392 newBufObj
->RefCount
++;
396 case GL_ARRAY_BUFFER_ARB
:
397 ctx
->Array
.ArrayBufferObj
= newBufObj
;
399 case GL_ELEMENT_ARRAY_BUFFER_ARB
:
400 ctx
->Array
.ElementArrayBufferObj
= newBufObj
;
404 /* Pass BindBuffer call to device driver */
405 if ( (ctx
->Driver
.BindBuffer
!= NULL
) && (newBufObj
!= NULL
) )
406 (*ctx
->Driver
.BindBuffer
)( ctx
, target
, newBufObj
);
408 if ( oldBufObj
!= NULL
) {
409 oldBufObj
->RefCount
--;
410 assert(oldBufObj
->RefCount
>= 0);
411 if (oldBufObj
->RefCount
== 0) {
412 assert(oldBufObj
->Name
!= 0);
413 _mesa_remove_buffer_object(ctx
, oldBufObj
);
414 ASSERT(ctx
->Driver
.DeleteBuffer
);
415 (*ctx
->Driver
.DeleteBuffer
)( ctx
, oldBufObj
);
422 * Delete a set of buffer objects.
424 * \param n Number of buffer objects to delete.
425 * \param buffer Array of \c n buffer object IDs.
428 _mesa_DeleteBuffersARB(GLsizei n
, const GLuint
*ids
)
430 GET_CURRENT_CONTEXT(ctx
);
432 ASSERT_OUTSIDE_BEGIN_END(ctx
);
435 _mesa_error(ctx
, GL_INVALID_VALUE
, "glDeleteBuffersARB(n)");
439 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
441 for (i
= 0; i
< n
; i
++) {
443 struct gl_buffer_object
*bufObj
= (struct gl_buffer_object
*)
444 _mesa_HashLookup(ctx
->Shared
->BufferObjects
, ids
[i
]);
446 /* unbind any vertex pointers bound to this buffer */
449 ASSERT(bufObj
->Name
!= 0);
451 if (ctx
->Array
.Vertex
.BufferObj
== bufObj
)
452 ctx
->Array
.Vertex
.BufferObj
= ctx
->Array
.NullBufferObj
;
453 if (ctx
->Array
.Normal
.BufferObj
== bufObj
)
454 ctx
->Array
.Normal
.BufferObj
= ctx
->Array
.NullBufferObj
;
455 if (ctx
->Array
.Color
.BufferObj
== bufObj
)
456 ctx
->Array
.Color
.BufferObj
= ctx
->Array
.NullBufferObj
;
457 if (ctx
->Array
.SecondaryColor
.BufferObj
== bufObj
)
458 ctx
->Array
.SecondaryColor
.BufferObj
= ctx
->Array
.NullBufferObj
;
459 if (ctx
->Array
.FogCoord
.BufferObj
== bufObj
)
460 ctx
->Array
.FogCoord
.BufferObj
= ctx
->Array
.NullBufferObj
;
461 if (ctx
->Array
.Index
.BufferObj
== bufObj
)
462 ctx
->Array
.Index
.BufferObj
= ctx
->Array
.NullBufferObj
;
463 if (ctx
->Array
.EdgeFlag
.BufferObj
== bufObj
)
464 ctx
->Array
.EdgeFlag
.BufferObj
= ctx
->Array
.NullBufferObj
;
465 for (j
= 0; j
< MAX_TEXTURE_UNITS
; j
++) {
466 if (ctx
->Array
.TexCoord
[j
].BufferObj
== bufObj
)
467 ctx
->Array
.TexCoord
[j
].BufferObj
= ctx
->Array
.NullBufferObj
;
469 for (j
= 0; j
< VERT_ATTRIB_MAX
; j
++) {
470 if (ctx
->Array
.VertexAttrib
[j
].BufferObj
== bufObj
)
471 ctx
->Array
.VertexAttrib
[j
].BufferObj
= ctx
->Array
.NullBufferObj
;
474 /* if deleting bound buffers, rebind to zero */
475 if (ctx
->Array
.ArrayBufferObj
== bufObj
) {
476 _mesa_BindBufferARB( GL_ARRAY_BUFFER_ARB
, 0 );
478 if (ctx
->Array
.ElementArrayBufferObj
== bufObj
) {
479 _mesa_BindBufferARB( GL_ELEMENT_ARRAY_BUFFER_ARB
, 0 );
483 if (bufObj
->RefCount
<= 0) {
484 _mesa_remove_buffer_object(ctx
, bufObj
);
485 ASSERT(ctx
->Driver
.DeleteBuffer
);
486 (*ctx
->Driver
.DeleteBuffer
)(ctx
, bufObj
);
492 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
497 * Generate a set of unique buffer object IDs and store them in \c buffer.
499 * \param n Number of IDs to generate.
500 * \param buffer Array of \c n locations to store the IDs.
503 _mesa_GenBuffersARB(GLsizei n
, GLuint
*buffer
)
505 GET_CURRENT_CONTEXT(ctx
);
508 ASSERT_OUTSIDE_BEGIN_END(ctx
);
511 _mesa_error(ctx
, GL_INVALID_VALUE
, "glGenBuffersARB");
515 if ( buffer
== NULL
) {
520 * This must be atomic (generation and allocation of buffer object IDs)
522 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
524 first
= _mesa_HashFindFreeKeyBlock(ctx
->Shared
->BufferObjects
, n
);
526 /* Allocate new, empty buffer objects and return identifiers */
527 for (i
= 0; i
< n
; i
++) {
528 struct gl_buffer_object
*bufObj
;
529 GLuint name
= first
+ i
;
531 bufObj
= (*ctx
->Driver
.NewBufferObject
)( ctx
, name
, target
);
533 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGenBuffersARB");
536 _mesa_save_buffer_object(ctx
, bufObj
);
537 buffer
[i
] = first
+ i
;
540 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
545 * Determine if ID is the name of a buffer object.
547 * \param id ID of the potential buffer object.
548 * \return \c GL_TRUE if \c id is the name of a buffer object,
549 * \c GL_FALSE otherwise.
552 _mesa_IsBufferARB(GLuint id
)
554 struct gl_buffer_object
* bufObj
;
555 GET_CURRENT_CONTEXT(ctx
);
556 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, GL_FALSE
);
561 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
562 bufObj
= (struct gl_buffer_object
*) _mesa_HashLookup(ctx
->Shared
->BufferObjects
, id
);
563 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
565 return (bufObj
!= NULL
);
570 _mesa_BufferDataARB(GLenum target
, GLsizeiptrARB size
,
571 const GLvoid
* data
, GLenum usage
)
573 GET_CURRENT_CONTEXT(ctx
);
574 struct gl_buffer_object
*bufObj
;
575 ASSERT_OUTSIDE_BEGIN_END(ctx
);
578 _mesa_error(ctx
, GL_INVALID_VALUE
, "glBufferDataARB(size < 0)");
583 case GL_STREAM_DRAW_ARB
:
584 case GL_STREAM_READ_ARB
:
585 case GL_STREAM_COPY_ARB
:
586 case GL_STATIC_DRAW_ARB
:
587 case GL_STATIC_READ_ARB
:
588 case GL_STATIC_COPY_ARB
:
589 case GL_DYNAMIC_DRAW_ARB
:
590 case GL_DYNAMIC_READ_ARB
:
591 case GL_DYNAMIC_COPY_ARB
:
595 _mesa_error(ctx
, GL_INVALID_ENUM
, "glBufferDataARB(usage)");
599 bufObj
= buffer_object_get_target( ctx
, target
, "BufferDataARB" );
600 if ( bufObj
== NULL
) {
601 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glBufferDataARB" );
605 if (bufObj
->Pointer
) {
606 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glBufferSubDataARB(buffer is mapped)" );
610 ASSERT(ctx
->Driver
.BufferData
);
612 /* Give the buffer object to the driver! <data> may be null! */
613 (*ctx
->Driver
.BufferData
)( ctx
, target
, size
, data
, usage
, bufObj
);
618 _mesa_BufferSubDataARB(GLenum target
, GLintptrARB offset
,
619 GLsizeiptrARB size
, const GLvoid
* data
)
621 GET_CURRENT_CONTEXT(ctx
);
622 struct gl_buffer_object
*bufObj
;
623 ASSERT_OUTSIDE_BEGIN_END(ctx
);
625 bufObj
= buffer_object_subdata_range_good( ctx
, target
, offset
, size
,
626 "glBufferSubDataARB" );
628 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glBufferSubDataARB" );
632 if (bufObj
->Pointer
) {
633 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glBufferSubDataARB(buffer is mapped)" );
637 ASSERT(ctx
->Driver
.BufferSubData
);
638 (*ctx
->Driver
.BufferSubData
)( ctx
, target
, offset
, size
, data
, bufObj
);
643 _mesa_GetBufferSubDataARB(GLenum target
, GLintptrARB offset
,
644 GLsizeiptrARB size
, void * data
)
646 GET_CURRENT_CONTEXT(ctx
);
647 struct gl_buffer_object
*bufObj
;
648 ASSERT_OUTSIDE_BEGIN_END(ctx
);
650 bufObj
= buffer_object_subdata_range_good( ctx
, target
, offset
, size
,
651 "glGetBufferSubDataARB" );
653 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetBufferSubDataARB" );
657 if (bufObj
->Pointer
) {
658 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetBufferSubDataARB(buffer is mapped)" );
662 ASSERT(ctx
->Driver
.GetBufferSubData
);
663 (*ctx
->Driver
.GetBufferSubData
)( ctx
, target
, offset
, size
, data
, bufObj
);
668 _mesa_MapBufferARB(GLenum target
, GLenum access
)
670 GET_CURRENT_CONTEXT(ctx
);
671 struct gl_buffer_object
* bufObj
;
672 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, NULL
);
675 case GL_READ_ONLY_ARB
:
676 case GL_WRITE_ONLY_ARB
:
677 case GL_READ_WRITE_ARB
:
681 _mesa_error(ctx
, GL_INVALID_ENUM
, "glMapBufferARB(access)");
685 bufObj
= buffer_object_get_target( ctx
, target
, "MapBufferARB" );
686 if ( bufObj
== NULL
) {
687 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glMapBufferARB" );
691 if ( bufObj
->Pointer
!= NULL
) {
692 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glMapBufferARB(already mapped)");
696 ASSERT(ctx
->Driver
.MapBuffer
);
697 bufObj
->Pointer
= (*ctx
->Driver
.MapBuffer
)( ctx
, target
, access
, bufObj
);
698 if ( bufObj
->Pointer
== NULL
) {
699 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glMapBufferARB(access)");
702 bufObj
->Access
= access
;
704 return bufObj
->Pointer
;
709 _mesa_UnmapBufferARB(GLenum target
)
711 GET_CURRENT_CONTEXT(ctx
);
712 struct gl_buffer_object
*bufObj
;
713 GLboolean status
= GL_TRUE
;
714 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, GL_FALSE
);
716 bufObj
= buffer_object_get_target( ctx
, target
, "UnmapBufferARB" );
717 if ( bufObj
== NULL
) {
718 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glUnmapBufferARB" );
722 if ( bufObj
->Pointer
== NULL
) {
723 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glUnmapBufferARB");
727 if ( ctx
->Driver
.UnmapBuffer
!= NULL
) {
728 status
= (*ctx
->Driver
.UnmapBuffer
)( ctx
, target
, bufObj
);
731 bufObj
->Access
= GL_READ_WRITE_ARB
; /* initial value, OK? */
732 bufObj
->Pointer
= NULL
;
739 _mesa_GetBufferParameterivARB(GLenum target
, GLenum pname
, GLint
*params
)
741 GET_CURRENT_CONTEXT(ctx
);
742 struct gl_buffer_object
*bufObj
;
743 ASSERT_OUTSIDE_BEGIN_END(ctx
);
745 bufObj
= buffer_object_get_target( ctx
, target
, "GetBufferParameterivARB" );
747 _mesa_error(ctx
, GL_INVALID_OPERATION
, "GetBufferParameterivARB" );
752 case GL_BUFFER_SIZE_ARB
:
753 *params
= bufObj
->Size
;
755 case GL_BUFFER_USAGE_ARB
:
756 *params
= bufObj
->Usage
;
758 case GL_BUFFER_ACCESS_ARB
:
759 *params
= bufObj
->Access
;
761 case GL_BUFFER_MAPPED_ARB
:
762 *params
= (bufObj
->Pointer
!= NULL
);
765 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetBufferParameterivARB(pname)");
772 _mesa_GetBufferPointervARB(GLenum target
, GLenum pname
, GLvoid
**params
)
774 GET_CURRENT_CONTEXT(ctx
);
775 struct gl_buffer_object
* bufObj
;
776 ASSERT_OUTSIDE_BEGIN_END(ctx
);
778 if (pname
!= GL_BUFFER_MAP_POINTER_ARB
) {
779 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetBufferPointervARB(pname)");
783 bufObj
= buffer_object_get_target( ctx
, target
, "GetBufferPointervARB" );
784 if ( bufObj
== NULL
) {
785 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetBufferPointervARB" );
789 *params
= bufObj
->Pointer
;