2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
6 * Copyright (C) 1999-2009 VMware, Inc. All Rights Reserved.
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:
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
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.
29 * \brief Functions for the GL_ARB_vertex/pixel_buffer_object extensions.
30 * \author Brian Paul, Ian Romanick
39 #include "bufferobj.h"
42 #ifdef FEATURE_OES_mapbuffer
43 #define DEFAULT_ACCESS GL_WRITE_ONLY;
45 #define DEFAULT_ACCESS GL_READ_WRITE;
50 * Get the buffer object bound to the specified target in a GL context.
52 * \param ctx GL context
53 * \param target Buffer object target to be retrieved. Currently this must
54 * be either \c GL_ARRAY_BUFFER or \c GL_ELEMENT_ARRAY_BUFFER.
55 * \return A pointer to the buffer object bound to \c target in the
56 * specified context or \c NULL if \c target is invalid.
58 static INLINE
struct gl_buffer_object
*
59 get_buffer(GLcontext
*ctx
, GLenum target
)
61 struct gl_buffer_object
* bufObj
= NULL
;
64 case GL_ARRAY_BUFFER_ARB
:
65 bufObj
= ctx
->Array
.ArrayBufferObj
;
67 case GL_ELEMENT_ARRAY_BUFFER_ARB
:
68 bufObj
= ctx
->Array
.ElementArrayBufferObj
;
70 case GL_PIXEL_PACK_BUFFER_EXT
:
71 bufObj
= ctx
->Pack
.BufferObj
;
73 case GL_PIXEL_UNPACK_BUFFER_EXT
:
74 bufObj
= ctx
->Unpack
.BufferObj
;
77 /* error must be recorded by caller */
81 /* bufObj should point to NullBufferObj or a user-created buffer object */
89 * Tests the subdata range parameters and sets the GL error code for
90 * \c glBufferSubDataARB and \c glGetBufferSubDataARB.
92 * \param ctx GL context.
93 * \param target Buffer object target on which to operate.
94 * \param offset Offset of the first byte of the subdata range.
95 * \param size Size, in bytes, of the subdata range.
96 * \param caller Name of calling function for recording errors.
97 * \return A pointer to the buffer object bound to \c target in the
98 * specified context or \c NULL if any of the parameter or state
99 * conditions for \c glBufferSubDataARB or \c glGetBufferSubDataARB
102 * \sa glBufferSubDataARB, glGetBufferSubDataARB
104 static struct gl_buffer_object
*
105 buffer_object_subdata_range_good( GLcontext
* ctx
, GLenum target
,
106 GLintptrARB offset
, GLsizeiptrARB size
,
109 struct gl_buffer_object
*bufObj
;
112 _mesa_error(ctx
, GL_INVALID_VALUE
, "%s(size < 0)", caller
);
117 _mesa_error(ctx
, GL_INVALID_VALUE
, "%s(offset < 0)", caller
);
121 bufObj
= get_buffer(ctx
, target
);
123 _mesa_error(ctx
, GL_INVALID_ENUM
, "%s(target)", caller
);
126 if (bufObj
->Name
== 0) {
127 _mesa_error(ctx
, GL_INVALID_OPERATION
, "%s", caller
);
130 if (offset
+ size
> bufObj
->Size
) {
131 _mesa_error(ctx
, GL_INVALID_VALUE
,
132 "%s(size + offset > buffer size)", caller
);
135 if (bufObj
->Pointer
) {
136 /* Buffer is currently mapped */
137 _mesa_error(ctx
, GL_INVALID_OPERATION
, "%s", caller
);
146 * Allocate and initialize a new buffer object.
148 * Default callback for the \c dd_function_table::NewBufferObject() hook.
150 struct gl_buffer_object
*
151 _mesa_new_buffer_object( GLcontext
*ctx
, GLuint name
, GLenum target
)
153 struct gl_buffer_object
*obj
;
157 obj
= MALLOC_STRUCT(gl_buffer_object
);
158 _mesa_initialize_buffer_object(obj
, name
, target
);
164 * Delete a buffer object.
166 * Default callback for the \c dd_function_table::DeleteBuffer() hook.
169 _mesa_delete_buffer_object( GLcontext
*ctx
, struct gl_buffer_object
*bufObj
)
174 _mesa_free(bufObj
->Data
);
176 /* assign strange values here to help w/ debugging */
177 bufObj
->RefCount
= -1000;
186 * Set ptr to bufObj w/ reference counting.
189 _mesa_reference_buffer_object(GLcontext
*ctx
,
190 struct gl_buffer_object
**ptr
,
191 struct gl_buffer_object
*bufObj
)
197 /* Unreference the old texture */
198 GLboolean deleteFlag
= GL_FALSE
;
199 struct gl_buffer_object
*oldObj
= *ptr
;
201 /*_glthread_LOCK_MUTEX(oldObj->Mutex);*/
202 ASSERT(oldObj
->RefCount
> 0);
205 printf("BufferObj %p %d DECR to %d\n",
206 (void *) oldObj
, oldObj
->Name
, oldObj
->RefCount
);
208 deleteFlag
= (oldObj
->RefCount
== 0);
209 /*_glthread_UNLOCK_MUTEX(oldObj->Mutex);*/
213 /* some sanity checking: don't delete a buffer still in use */
215 /* unfortunately, these tests are invalid during context tear-down */
216 ASSERT(ctx
->Array
.ArrayBufferObj
!= bufObj
);
217 ASSERT(ctx
->Array
.ElementArrayBufferObj
!= bufObj
);
218 ASSERT(ctx
->Array
.ArrayObj
->Vertex
.BufferObj
!= bufObj
);
221 ASSERT(ctx
->Driver
.DeleteBuffer
);
222 ctx
->Driver
.DeleteBuffer(ctx
, oldObj
);
230 /* reference new texture */
231 /*_glthread_LOCK_MUTEX(tex->Mutex);*/
232 if (bufObj
->RefCount
== 0) {
233 /* this buffer's being deleted (look just above) */
234 /* Not sure this can every really happen. Warn if it does. */
235 _mesa_problem(NULL
, "referencing deleted buffer object");
241 printf("BufferObj %p %d INCR to %d\n",
242 (void *) bufObj
, bufObj
->Name
, bufObj
->RefCount
);
246 /*_glthread_UNLOCK_MUTEX(tex->Mutex);*/
252 * Initialize a buffer object to default values.
255 _mesa_initialize_buffer_object( struct gl_buffer_object
*obj
,
256 GLuint name
, GLenum target
)
260 _mesa_bzero(obj
, sizeof(struct gl_buffer_object
));
263 obj
->Usage
= GL_STATIC_DRAW_ARB
;
264 obj
->Access
= DEFAULT_ACCESS
;
269 * Allocate space for and store data in a buffer object. Any data that was
270 * previously stored in the buffer object is lost. If \c data is \c NULL,
271 * memory will be allocated, but no copy will occur.
273 * This is the default callback for \c dd_function_table::BufferData()
274 * Note that all GL error checking will have been done already.
276 * \param ctx GL context.
277 * \param target Buffer object target on which to operate.
278 * \param size Size, in bytes, of the new data store.
279 * \param data Pointer to the data to store in the buffer object. This
280 * pointer may be \c NULL.
281 * \param usage Hints about how the data will be used.
282 * \param bufObj Object to be used.
284 * \sa glBufferDataARB, dd_function_table::BufferData.
287 _mesa_buffer_data( GLcontext
*ctx
, GLenum target
, GLsizeiptrARB size
,
288 const GLvoid
* data
, GLenum usage
,
289 struct gl_buffer_object
* bufObj
)
293 (void) ctx
; (void) target
;
295 new_data
= _mesa_realloc( bufObj
->Data
, bufObj
->Size
, size
);
297 bufObj
->Data
= (GLubyte
*) new_data
;
299 bufObj
->Usage
= usage
;
302 _mesa_memcpy( bufObj
->Data
, data
, size
);
309 * Replace data in a subrange of buffer object. If the data range
310 * specified by \c size + \c offset extends beyond the end of the buffer or
311 * if \c data is \c NULL, no copy is performed.
313 * This is the default callback for \c dd_function_table::BufferSubData()
314 * Note that all GL error checking will have been done already.
316 * \param ctx GL context.
317 * \param target Buffer object target on which to operate.
318 * \param offset Offset of the first byte to be modified.
319 * \param size Size, in bytes, of the data range.
320 * \param data Pointer to the data to store in the buffer object.
321 * \param bufObj Object to be used.
323 * \sa glBufferSubDataARB, dd_function_table::BufferSubData.
326 _mesa_buffer_subdata( GLcontext
*ctx
, GLenum target
, GLintptrARB offset
,
327 GLsizeiptrARB size
, const GLvoid
* data
,
328 struct gl_buffer_object
* bufObj
)
330 (void) ctx
; (void) target
;
332 /* this should have been caught in _mesa_BufferSubData() */
333 ASSERT(size
+ offset
<= bufObj
->Size
);
336 _mesa_memcpy( (GLubyte
*) bufObj
->Data
+ offset
, data
, size
);
342 * Retrieve data from a subrange of buffer object. If the data range
343 * specified by \c size + \c offset extends beyond the end of the buffer or
344 * if \c data is \c NULL, no copy is performed.
346 * This is the default callback for \c dd_function_table::GetBufferSubData()
347 * Note that all GL error checking will have been done already.
349 * \param ctx GL context.
350 * \param target Buffer object target on which to operate.
351 * \param offset Offset of the first byte to be fetched.
352 * \param size Size, in bytes, of the data range.
353 * \param data Destination for data
354 * \param bufObj Object to be used.
356 * \sa glBufferGetSubDataARB, dd_function_table::GetBufferSubData.
359 _mesa_buffer_get_subdata( GLcontext
*ctx
, GLenum target
, GLintptrARB offset
,
360 GLsizeiptrARB size
, GLvoid
* data
,
361 struct gl_buffer_object
* bufObj
)
363 (void) ctx
; (void) target
;
365 if (bufObj
->Data
&& ((GLsizeiptrARB
) (size
+ offset
) <= bufObj
->Size
)) {
366 _mesa_memcpy( data
, (GLubyte
*) bufObj
->Data
+ offset
, size
);
372 * Default callback for \c dd_function_tabel::MapBuffer().
374 * The function parameters will have been already tested for errors.
376 * \param ctx GL context.
377 * \param target Buffer object target on which to operate.
378 * \param access Information about how the buffer will be accessed.
379 * \param bufObj Object to be mapped.
380 * \return A pointer to the object's internal data store that can be accessed
383 * \sa glMapBufferARB, dd_function_table::MapBuffer
386 _mesa_buffer_map( GLcontext
*ctx
, GLenum target
, GLenum access
,
387 struct gl_buffer_object
*bufObj
)
392 ASSERT(!bufObj
->OnCard
);
393 /* Just return a direct pointer to the data */
394 if (bufObj
->Pointer
) {
395 /* already mapped! */
398 bufObj
->Pointer
= bufObj
->Data
;
399 return bufObj
->Pointer
;
404 * Default callback for \c dd_function_table::MapBuffer().
406 * The input parameters will have been already tested for errors.
408 * \sa glUnmapBufferARB, dd_function_table::UnmapBuffer
411 _mesa_buffer_unmap( GLcontext
*ctx
, GLenum target
,
412 struct gl_buffer_object
*bufObj
)
416 ASSERT(!bufObj
->OnCard
);
417 /* XXX we might assert here that bufObj->Pointer is non-null */
418 bufObj
->Pointer
= NULL
;
424 * Initialize the state associated with buffer objects
427 _mesa_init_buffer_objects( GLcontext
*ctx
)
429 /* Allocate the default buffer object and set refcount so high that
430 * it never gets deleted.
431 * XXX with recent/improved refcounting this may not longer be needed.
433 ctx
->Array
.NullBufferObj
= _mesa_new_buffer_object(ctx
, 0, 0);
434 if (ctx
->Array
.NullBufferObj
)
435 ctx
->Array
.NullBufferObj
->RefCount
= 1000;
437 ctx
->Array
.ArrayBufferObj
= ctx
->Array
.NullBufferObj
;
438 ctx
->Array
.ElementArrayBufferObj
= ctx
->Array
.NullBufferObj
;
443 * Bind the specified target to buffer for the specified context.
446 bind_buffer_object(GLcontext
*ctx
, GLenum target
, GLuint buffer
)
448 struct gl_buffer_object
*oldBufObj
;
449 struct gl_buffer_object
*newBufObj
= NULL
;
450 struct gl_buffer_object
**bindTarget
= NULL
;
453 case GL_ARRAY_BUFFER_ARB
:
454 bindTarget
= &ctx
->Array
.ArrayBufferObj
;
456 case GL_ELEMENT_ARRAY_BUFFER_ARB
:
457 bindTarget
= &ctx
->Array
.ElementArrayBufferObj
;
459 case GL_PIXEL_PACK_BUFFER_EXT
:
460 bindTarget
= &ctx
->Pack
.BufferObj
;
462 case GL_PIXEL_UNPACK_BUFFER_EXT
:
463 bindTarget
= &ctx
->Unpack
.BufferObj
;
466 _mesa_error(ctx
, GL_INVALID_ENUM
, "glBindBufferARB(target)");
470 /* Get pointer to old buffer object (to be unbound) */
471 oldBufObj
= get_buffer(ctx
, target
);
472 if (oldBufObj
&& oldBufObj
->Name
== buffer
)
473 return; /* rebinding the same buffer object- no change */
476 * Get pointer to new buffer object (newBufObj)
479 /* The spec says there's not a buffer object named 0, but we use
480 * one internally because it simplifies things.
482 newBufObj
= ctx
->Array
.NullBufferObj
;
485 /* non-default buffer object */
486 newBufObj
= _mesa_lookup_bufferobj(ctx
, buffer
);
488 /* if this is a new buffer object id, allocate a buffer object now */
489 ASSERT(ctx
->Driver
.NewBufferObject
);
490 newBufObj
= ctx
->Driver
.NewBufferObject(ctx
, buffer
, target
);
492 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glBindBufferARB");
495 _mesa_HashInsert(ctx
->Shared
->BufferObjects
, buffer
, newBufObj
);
499 /* bind new buffer */
500 _mesa_reference_buffer_object(ctx
, bindTarget
, newBufObj
);
502 /* Pass BindBuffer call to device driver */
503 if (ctx
->Driver
.BindBuffer
&& newBufObj
)
504 ctx
->Driver
.BindBuffer( ctx
, target
, newBufObj
);
509 * Update the default buffer objects in the given context to reference those
510 * specified in the shared state and release those referencing the old
514 _mesa_update_default_objects_buffer_objects(GLcontext
*ctx
)
516 /* Bind the NullBufferObj to remove references to those
517 * in the shared context hash table.
519 bind_buffer_object( ctx
, GL_ARRAY_BUFFER_ARB
, 0);
520 bind_buffer_object( ctx
, GL_ELEMENT_ARRAY_BUFFER_ARB
, 0);
521 bind_buffer_object( ctx
, GL_PIXEL_PACK_BUFFER_ARB
, 0);
522 bind_buffer_object( ctx
, GL_PIXEL_UNPACK_BUFFER_ARB
, 0);
527 * When we're about to read pixel data out of a PBO (via glDrawPixels,
528 * glTexImage, etc) or write data into a PBO (via glReadPixels,
529 * glGetTexImage, etc) we call this function to check that we're not
530 * going to read out of bounds.
532 * XXX This would also be a convenient time to check that the PBO isn't
533 * currently mapped. Whoever calls this function should check for that.
534 * Remember, we can't use a PBO when it's mapped!
536 * \param width width of image to read/write
537 * \param height height of image to read/write
538 * \param depth depth of image to read/write
539 * \param format format of image to read/write
540 * \param type datatype of image to read/write
541 * \param ptr the user-provided pointer/offset
542 * \return GL_TRUE if the PBO access is OK, GL_FALSE if the access would
546 _mesa_validate_pbo_access(GLuint dimensions
,
547 const struct gl_pixelstore_attrib
*pack
,
548 GLsizei width
, GLsizei height
, GLsizei depth
,
549 GLenum format
, GLenum type
, const GLvoid
*ptr
)
552 const GLubyte
*sizeAddr
; /* buffer size, cast to a pointer */
554 ASSERT(pack
->BufferObj
->Name
!= 0);
556 if (pack
->BufferObj
->Size
== 0)
560 /* get address of first pixel we'll read */
561 start
= _mesa_image_address(dimensions
, pack
, ptr
, width
, height
,
562 format
, type
, 0, 0, 0);
564 /* get address just past the last pixel we'll read */
565 end
= _mesa_image_address(dimensions
, pack
, ptr
, width
, height
,
566 format
, type
, depth
-1, height
-1, width
);
569 sizeAddr
= ((const GLubyte
*) 0) + pack
->BufferObj
->Size
;
571 if ((const GLubyte
*) start
> sizeAddr
) {
572 /* This will catch negative values / wrap-around */
575 if ((const GLubyte
*) end
> sizeAddr
) {
576 /* Image read goes beyond end of buffer */
586 * If the source of glBitmap data is a PBO, check that we won't read out
587 * of buffer bounds, then map the buffer.
588 * If not sourcing from a PBO, just return the bitmap pointer.
589 * This is a helper function for (some) drivers.
590 * Return NULL if error.
591 * If non-null return, must call _mesa_unmap_bitmap_pbo() when done.
594 _mesa_map_bitmap_pbo(GLcontext
*ctx
,
595 const struct gl_pixelstore_attrib
*unpack
,
596 const GLubyte
*bitmap
)
600 if (unpack
->BufferObj
->Name
) {
601 /* unpack from PBO */
602 buf
= (GLubyte
*) ctx
->Driver
.MapBuffer(ctx
, GL_PIXEL_UNPACK_BUFFER_EXT
,
608 buf
= ADD_POINTERS(buf
, bitmap
);
611 /* unpack from normal memory */
620 * Counterpart to _mesa_map_bitmap_pbo()
621 * This is a helper function for (some) drivers.
624 _mesa_unmap_bitmap_pbo(GLcontext
*ctx
,
625 const struct gl_pixelstore_attrib
*unpack
)
627 if (unpack
->BufferObj
->Name
) {
628 ctx
->Driver
.UnmapBuffer(ctx
, GL_PIXEL_UNPACK_BUFFER_EXT
,
635 * \sa _mesa_map_bitmap_pbo
638 _mesa_map_drawpix_pbo(GLcontext
*ctx
,
639 const struct gl_pixelstore_attrib
*unpack
,
640 const GLvoid
*pixels
)
644 if (unpack
->BufferObj
->Name
) {
645 /* unpack from PBO */
646 buf
= (GLubyte
*) ctx
->Driver
.MapBuffer(ctx
, GL_PIXEL_UNPACK_BUFFER_EXT
,
652 buf
= ADD_POINTERS(buf
, pixels
);
655 /* unpack from normal memory */
664 * \sa _mesa_unmap_bitmap_pbo
667 _mesa_unmap_drawpix_pbo(GLcontext
*ctx
,
668 const struct gl_pixelstore_attrib
*unpack
)
670 if (unpack
->BufferObj
->Name
) {
671 ctx
->Driver
.UnmapBuffer(ctx
, GL_PIXEL_UNPACK_BUFFER_EXT
,
678 * If PBO is bound, map the buffer, return dest pointer in mapped buffer.
679 * Call _mesa_unmap_readpix_pbo() when finished
680 * \return NULL if error
683 _mesa_map_readpix_pbo(GLcontext
*ctx
,
684 const struct gl_pixelstore_attrib
*pack
,
689 if (pack
->BufferObj
->Name
) {
691 buf
= (GLubyte
*) ctx
->Driver
.MapBuffer(ctx
, GL_PIXEL_PACK_BUFFER_EXT
,
697 buf
= ADD_POINTERS(buf
, dest
);
700 /* pack to normal memory */
709 * Counterpart to _mesa_map_readpix_pbo()
712 _mesa_unmap_readpix_pbo(GLcontext
*ctx
,
713 const struct gl_pixelstore_attrib
*pack
)
715 if (pack
->BufferObj
->Name
) {
716 ctx
->Driver
.UnmapBuffer(ctx
, GL_PIXEL_PACK_BUFFER_EXT
, pack
->BufferObj
);
723 * Return the gl_buffer_object for the given ID.
724 * Always return NULL for ID 0.
726 struct gl_buffer_object
*
727 _mesa_lookup_bufferobj(GLcontext
*ctx
, GLuint buffer
)
732 return (struct gl_buffer_object
*)
733 _mesa_HashLookup(ctx
->Shared
->BufferObjects
, buffer
);
738 * If *ptr points to obj, set ptr = the Null/default buffer object.
739 * This is a helper for buffer object deletion.
740 * The GL spec says that deleting a buffer object causes it to get
741 * unbound from all arrays in the current context.
744 unbind(GLcontext
*ctx
,
745 struct gl_buffer_object
**ptr
,
746 struct gl_buffer_object
*obj
)
749 _mesa_reference_buffer_object(ctx
, ptr
, ctx
->Array
.NullBufferObj
);
755 /**********************************************************************/
757 /**********************************************************************/
760 _mesa_BindBufferARB(GLenum target
, GLuint buffer
)
762 GET_CURRENT_CONTEXT(ctx
);
763 ASSERT_OUTSIDE_BEGIN_END(ctx
);
765 bind_buffer_object(ctx
, target
, buffer
);
770 * Delete a set of buffer objects.
772 * \param n Number of buffer objects to delete.
773 * \param ids Array of \c n buffer object IDs.
776 _mesa_DeleteBuffersARB(GLsizei n
, const GLuint
*ids
)
778 GET_CURRENT_CONTEXT(ctx
);
780 ASSERT_OUTSIDE_BEGIN_END(ctx
);
783 _mesa_error(ctx
, GL_INVALID_VALUE
, "glDeleteBuffersARB(n)");
787 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
789 for (i
= 0; i
< n
; i
++) {
790 struct gl_buffer_object
*bufObj
= _mesa_lookup_bufferobj(ctx
, ids
[i
]);
794 ASSERT(bufObj
->Name
== ids
[i
]);
796 if (bufObj
->Pointer
) {
797 /* if mapped, unmap it now */
798 ctx
->Driver
.UnmapBuffer(ctx
, 0, bufObj
);
799 bufObj
->Access
= DEFAULT_ACCESS
;
800 bufObj
->Pointer
= NULL
;
803 /* unbind any vertex pointers bound to this buffer */
804 unbind(ctx
, &ctx
->Array
.ArrayObj
->Vertex
.BufferObj
, bufObj
);
805 unbind(ctx
, &ctx
->Array
.ArrayObj
->Normal
.BufferObj
, bufObj
);
806 unbind(ctx
, &ctx
->Array
.ArrayObj
->Color
.BufferObj
, bufObj
);
807 unbind(ctx
, &ctx
->Array
.ArrayObj
->SecondaryColor
.BufferObj
, bufObj
);
808 unbind(ctx
, &ctx
->Array
.ArrayObj
->FogCoord
.BufferObj
, bufObj
);
809 unbind(ctx
, &ctx
->Array
.ArrayObj
->Index
.BufferObj
, bufObj
);
810 unbind(ctx
, &ctx
->Array
.ArrayObj
->EdgeFlag
.BufferObj
, bufObj
);
811 for (j
= 0; j
< MAX_TEXTURE_COORD_UNITS
; j
++) {
812 unbind(ctx
, &ctx
->Array
.ArrayObj
->TexCoord
[j
].BufferObj
, bufObj
);
814 for (j
= 0; j
< VERT_ATTRIB_MAX
; j
++) {
815 unbind(ctx
, &ctx
->Array
.ArrayObj
->VertexAttrib
[j
].BufferObj
, bufObj
);
818 if (ctx
->Array
.ArrayBufferObj
== bufObj
) {
819 _mesa_BindBufferARB( GL_ARRAY_BUFFER_ARB
, 0 );
821 if (ctx
->Array
.ElementArrayBufferObj
== bufObj
) {
822 _mesa_BindBufferARB( GL_ELEMENT_ARRAY_BUFFER_ARB
, 0 );
825 /* unbind any pixel pack/unpack pointers bound to this buffer */
826 if (ctx
->Pack
.BufferObj
== bufObj
) {
827 _mesa_BindBufferARB( GL_PIXEL_PACK_BUFFER_EXT
, 0 );
829 if (ctx
->Unpack
.BufferObj
== bufObj
) {
830 _mesa_BindBufferARB( GL_PIXEL_UNPACK_BUFFER_EXT
, 0 );
833 /* The ID is immediately freed for re-use */
834 _mesa_HashRemove(ctx
->Shared
->BufferObjects
, bufObj
->Name
);
835 _mesa_reference_buffer_object(ctx
, &bufObj
, NULL
);
839 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
844 * Generate a set of unique buffer object IDs and store them in \c buffer.
846 * \param n Number of IDs to generate.
847 * \param buffer Array of \c n locations to store the IDs.
850 _mesa_GenBuffersARB(GLsizei n
, GLuint
*buffer
)
852 GET_CURRENT_CONTEXT(ctx
);
855 ASSERT_OUTSIDE_BEGIN_END(ctx
);
858 _mesa_error(ctx
, GL_INVALID_VALUE
, "glGenBuffersARB");
867 * This must be atomic (generation and allocation of buffer object IDs)
869 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
871 first
= _mesa_HashFindFreeKeyBlock(ctx
->Shared
->BufferObjects
, n
);
873 /* Allocate new, empty buffer objects and return identifiers */
874 for (i
= 0; i
< n
; i
++) {
875 struct gl_buffer_object
*bufObj
;
876 GLuint name
= first
+ i
;
878 bufObj
= ctx
->Driver
.NewBufferObject( ctx
, name
, target
);
880 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
881 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGenBuffersARB");
884 _mesa_HashInsert(ctx
->Shared
->BufferObjects
, first
+ i
, bufObj
);
885 buffer
[i
] = first
+ i
;
888 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
893 * Determine if ID is the name of a buffer object.
895 * \param id ID of the potential buffer object.
896 * \return \c GL_TRUE if \c id is the name of a buffer object,
897 * \c GL_FALSE otherwise.
900 _mesa_IsBufferARB(GLuint id
)
902 struct gl_buffer_object
*bufObj
;
903 GET_CURRENT_CONTEXT(ctx
);
904 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, GL_FALSE
);
906 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
907 bufObj
= _mesa_lookup_bufferobj(ctx
, id
);
908 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
910 return bufObj
? GL_TRUE
: GL_FALSE
;
915 _mesa_BufferDataARB(GLenum target
, GLsizeiptrARB size
,
916 const GLvoid
* data
, GLenum usage
)
918 GET_CURRENT_CONTEXT(ctx
);
919 struct gl_buffer_object
*bufObj
;
920 ASSERT_OUTSIDE_BEGIN_END(ctx
);
923 _mesa_error(ctx
, GL_INVALID_VALUE
, "glBufferDataARB(size < 0)");
928 case GL_STREAM_DRAW_ARB
:
929 case GL_STREAM_READ_ARB
:
930 case GL_STREAM_COPY_ARB
:
931 case GL_STATIC_DRAW_ARB
:
932 case GL_STATIC_READ_ARB
:
933 case GL_STATIC_COPY_ARB
:
934 case GL_DYNAMIC_DRAW_ARB
:
935 case GL_DYNAMIC_READ_ARB
:
936 case GL_DYNAMIC_COPY_ARB
:
940 _mesa_error(ctx
, GL_INVALID_ENUM
, "glBufferDataARB(usage)");
944 bufObj
= get_buffer(ctx
, target
);
946 _mesa_error(ctx
, GL_INVALID_ENUM
, "glBufferDataARB(target)" );
949 if (bufObj
->Name
== 0) {
950 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glBufferDataARB" );
954 if (bufObj
->Pointer
) {
955 /* Unmap the existing buffer. We'll replace it now. Not an error. */
956 ctx
->Driver
.UnmapBuffer(ctx
, target
, bufObj
);
957 bufObj
->Access
= DEFAULT_ACCESS
;
958 bufObj
->Pointer
= NULL
;
961 ASSERT(ctx
->Driver
.BufferData
);
963 /* Give the buffer object to the driver! <data> may be null! */
964 ctx
->Driver
.BufferData( ctx
, target
, size
, data
, usage
, bufObj
);
969 _mesa_BufferSubDataARB(GLenum target
, GLintptrARB offset
,
970 GLsizeiptrARB size
, const GLvoid
* data
)
972 GET_CURRENT_CONTEXT(ctx
);
973 struct gl_buffer_object
*bufObj
;
974 ASSERT_OUTSIDE_BEGIN_END(ctx
);
976 bufObj
= buffer_object_subdata_range_good( ctx
, target
, offset
, size
,
977 "glBufferSubDataARB" );
979 /* error already recorded */
983 ASSERT(ctx
->Driver
.BufferSubData
);
984 ctx
->Driver
.BufferSubData( ctx
, target
, offset
, size
, data
, bufObj
);
989 _mesa_GetBufferSubDataARB(GLenum target
, GLintptrARB offset
,
990 GLsizeiptrARB size
, void * data
)
992 GET_CURRENT_CONTEXT(ctx
);
993 struct gl_buffer_object
*bufObj
;
994 ASSERT_OUTSIDE_BEGIN_END(ctx
);
996 bufObj
= buffer_object_subdata_range_good( ctx
, target
, offset
, size
,
997 "glGetBufferSubDataARB" );
999 /* error already recorded */
1003 ASSERT(ctx
->Driver
.GetBufferSubData
);
1004 ctx
->Driver
.GetBufferSubData( ctx
, target
, offset
, size
, data
, bufObj
);
1009 _mesa_MapBufferARB(GLenum target
, GLenum access
)
1011 GET_CURRENT_CONTEXT(ctx
);
1012 struct gl_buffer_object
* bufObj
;
1013 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, NULL
);
1016 case GL_READ_ONLY_ARB
:
1017 case GL_WRITE_ONLY_ARB
:
1018 case GL_READ_WRITE_ARB
:
1022 _mesa_error(ctx
, GL_INVALID_ENUM
, "glMapBufferARB(access)");
1026 bufObj
= get_buffer(ctx
, target
);
1028 _mesa_error(ctx
, GL_INVALID_ENUM
, "glMapBufferARB(target)" );
1031 if (bufObj
->Name
== 0) {
1032 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glMapBufferARB" );
1035 if (bufObj
->Pointer
) {
1036 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glMapBufferARB(already mapped)");
1040 ASSERT(ctx
->Driver
.MapBuffer
);
1041 bufObj
->Pointer
= ctx
->Driver
.MapBuffer( ctx
, target
, access
, bufObj
);
1042 if (!bufObj
->Pointer
) {
1043 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glMapBufferARB(access)");
1046 bufObj
->Access
= access
;
1048 return bufObj
->Pointer
;
1052 GLboolean GLAPIENTRY
1053 _mesa_UnmapBufferARB(GLenum target
)
1055 GET_CURRENT_CONTEXT(ctx
);
1056 struct gl_buffer_object
*bufObj
;
1057 GLboolean status
= GL_TRUE
;
1058 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, GL_FALSE
);
1060 bufObj
= get_buffer(ctx
, target
);
1062 _mesa_error(ctx
, GL_INVALID_ENUM
, "glUnmapBufferARB(target)" );
1065 if (bufObj
->Name
== 0) {
1066 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glUnmapBufferARB" );
1069 if (!bufObj
->Pointer
) {
1070 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glUnmapBufferARB");
1074 status
= ctx
->Driver
.UnmapBuffer( ctx
, target
, bufObj
);
1075 bufObj
->Access
= DEFAULT_ACCESS
;
1076 bufObj
->Pointer
= NULL
;
1083 _mesa_GetBufferParameterivARB(GLenum target
, GLenum pname
, GLint
*params
)
1085 GET_CURRENT_CONTEXT(ctx
);
1086 struct gl_buffer_object
*bufObj
;
1087 ASSERT_OUTSIDE_BEGIN_END(ctx
);
1089 bufObj
= get_buffer(ctx
, target
);
1091 _mesa_error(ctx
, GL_INVALID_ENUM
, "GetBufferParameterivARB(target)" );
1094 if (bufObj
->Name
== 0) {
1095 _mesa_error(ctx
, GL_INVALID_OPERATION
, "GetBufferParameterivARB" );
1100 case GL_BUFFER_SIZE_ARB
:
1101 *params
= (GLint
) bufObj
->Size
;
1103 case GL_BUFFER_USAGE_ARB
:
1104 *params
= bufObj
->Usage
;
1106 case GL_BUFFER_ACCESS_ARB
:
1107 *params
= bufObj
->Access
;
1109 case GL_BUFFER_MAPPED_ARB
:
1110 *params
= (bufObj
->Pointer
!= NULL
);
1113 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetBufferParameterivARB(pname)");
1120 _mesa_GetBufferPointervARB(GLenum target
, GLenum pname
, GLvoid
**params
)
1122 GET_CURRENT_CONTEXT(ctx
);
1123 struct gl_buffer_object
* bufObj
;
1124 ASSERT_OUTSIDE_BEGIN_END(ctx
);
1126 if (pname
!= GL_BUFFER_MAP_POINTER_ARB
) {
1127 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetBufferPointervARB(pname)");
1131 bufObj
= get_buffer(ctx
, target
);
1133 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetBufferPointervARB(target)" );
1136 if (bufObj
->Name
== 0) {
1137 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetBufferPointervARB" );
1141 *params
= bufObj
->Pointer
;