2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
6 * Copyright (C) 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 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
22 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
23 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
24 * OTHER DEALINGS IN THE SOFTWARE.
30 * \brief Functions for the GL_ARB_vertex/pixel_buffer_object extensions.
31 * \author Brian Paul, Ian Romanick
41 #include "bufferobj.h"
45 #include "transformfeedback.h"
51 /*#define BOUNDS_CHECK*/
55 * Used as a placeholder for buffer objects between glGenBuffers() and
56 * glBindBuffer() so that glIsBuffer() can work correctly.
58 static struct gl_buffer_object DummyBufferObject
;
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.
68 static inline struct gl_buffer_object
**
69 get_buffer_target(struct gl_context
*ctx
, GLenum target
)
71 /* Other targets are only supported in desktop OpenGL and OpenGL ES 3.0.
73 if (!_mesa_is_desktop_gl(ctx
) && !_mesa_is_gles3(ctx
)
74 && target
!= GL_ARRAY_BUFFER
&& target
!= GL_ELEMENT_ARRAY_BUFFER
)
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 case GL_TRANSFORM_FEEDBACK_BUFFER
:
91 if (ctx
->Extensions
.EXT_transform_feedback
) {
92 return &ctx
->TransformFeedback
.CurrentBuffer
;
95 case GL_TEXTURE_BUFFER
:
96 if (ctx
->API
== API_OPENGL_CORE
&&
97 ctx
->Extensions
.ARB_texture_buffer_object
) {
98 return &ctx
->Texture
.BufferObject
;
101 case GL_UNIFORM_BUFFER
:
102 if (ctx
->Extensions
.ARB_uniform_buffer_object
) {
103 return &ctx
->UniformBuffer
;
114 * Get the buffer object bound to the specified target in a GL context.
115 * \param ctx the GL context
116 * \param target the buffer object target to be retrieved.
117 * \return pointer to the buffer object bound to \c target in the
118 * specified context or \c NULL if \c target is invalid.
120 static inline struct gl_buffer_object
*
121 get_buffer(struct gl_context
*ctx
, const char *func
, GLenum target
)
123 struct gl_buffer_object
**bufObj
= get_buffer_target(ctx
, target
);
126 _mesa_error(ctx
, GL_INVALID_ENUM
, "%s(target)", func
);
130 if (!_mesa_is_bufferobj(*bufObj
)) {
131 _mesa_error(ctx
, GL_INVALID_OPERATION
, "%s(buffer 0)", func
);
140 * Convert a GLbitfield describing the mapped buffer access flags
141 * into one of GL_READ_WRITE, GL_READ_ONLY, or GL_WRITE_ONLY.
144 simplified_access_mode(struct gl_context
*ctx
, GLbitfield access
)
146 const GLbitfield rwFlags
= GL_MAP_READ_BIT
| GL_MAP_WRITE_BIT
;
147 if ((access
& rwFlags
) == rwFlags
)
148 return GL_READ_WRITE
;
149 if ((access
& GL_MAP_READ_BIT
) == GL_MAP_READ_BIT
)
151 if ((access
& GL_MAP_WRITE_BIT
) == GL_MAP_WRITE_BIT
)
152 return GL_WRITE_ONLY
;
154 /* Otherwise, AccessFlags is zero (the default state).
156 * Table 2.6 on page 31 (page 44 of the PDF) of the OpenGL 1.5 spec says:
158 * Name Type Initial Value Legal Values
160 * BUFFER_ACCESS enum READ_WRITE READ_ONLY, WRITE_ONLY
163 * However, table 6.8 in the GL_OES_mapbuffer extension says:
165 * Get Value Type Get Command Value Description
166 * --------- ---- ----------- ----- -----------
167 * BUFFER_ACCESS_OES Z1 GetBufferParameteriv WRITE_ONLY_OES buffer map flag
169 * The difference is because GL_OES_mapbuffer only supports mapping buffers
174 return _mesa_is_gles(ctx
) ? GL_WRITE_ONLY
: GL_READ_WRITE
;
179 * Tests the subdata range parameters and sets the GL error code for
180 * \c glBufferSubDataARB and \c glGetBufferSubDataARB.
182 * \param ctx GL context.
183 * \param target Buffer object target on which to operate.
184 * \param offset Offset of the first byte of the subdata range.
185 * \param size Size, in bytes, of the subdata range.
186 * \param caller Name of calling function for recording errors.
187 * \return A pointer to the buffer object bound to \c target in the
188 * specified context or \c NULL if any of the parameter or state
189 * conditions for \c glBufferSubDataARB or \c glGetBufferSubDataARB
192 * \sa glBufferSubDataARB, glGetBufferSubDataARB
194 static struct gl_buffer_object
*
195 buffer_object_subdata_range_good( struct gl_context
* ctx
, GLenum target
,
196 GLintptrARB offset
, GLsizeiptrARB size
,
199 struct gl_buffer_object
*bufObj
;
202 _mesa_error(ctx
, GL_INVALID_VALUE
, "%s(size < 0)", caller
);
207 _mesa_error(ctx
, GL_INVALID_VALUE
, "%s(offset < 0)", caller
);
211 bufObj
= get_buffer(ctx
, caller
, target
);
215 if (offset
+ size
> bufObj
->Size
) {
216 _mesa_error(ctx
, GL_INVALID_VALUE
,
217 "%s(offset %lu + size %lu > buffer size %lu)", caller
,
218 (unsigned long) offset
,
219 (unsigned long) size
,
220 (unsigned long) bufObj
->Size
);
223 if (_mesa_bufferobj_mapped(bufObj
)) {
224 /* Buffer is currently mapped */
225 _mesa_error(ctx
, GL_INVALID_OPERATION
, "%s", caller
);
234 * Allocate and initialize a new buffer object.
236 * Default callback for the \c dd_function_table::NewBufferObject() hook.
238 static struct gl_buffer_object
*
239 _mesa_new_buffer_object( struct gl_context
*ctx
, GLuint name
, GLenum target
)
241 struct gl_buffer_object
*obj
;
245 obj
= MALLOC_STRUCT(gl_buffer_object
);
246 _mesa_initialize_buffer_object(ctx
, obj
, name
, target
);
252 * Delete a buffer object.
254 * Default callback for the \c dd_function_table::DeleteBuffer() hook.
257 _mesa_delete_buffer_object(struct gl_context
*ctx
,
258 struct gl_buffer_object
*bufObj
)
264 /* assign strange values here to help w/ debugging */
265 bufObj
->RefCount
= -1000;
268 _glthread_DESTROY_MUTEX(bufObj
->Mutex
);
275 * Set ptr to bufObj w/ reference counting.
276 * This is normally only called from the _mesa_reference_buffer_object() macro
277 * when there's a real pointer change.
280 _mesa_reference_buffer_object_(struct gl_context
*ctx
,
281 struct gl_buffer_object
**ptr
,
282 struct gl_buffer_object
*bufObj
)
285 /* Unreference the old buffer */
286 GLboolean deleteFlag
= GL_FALSE
;
287 struct gl_buffer_object
*oldObj
= *ptr
;
289 _glthread_LOCK_MUTEX(oldObj
->Mutex
);
290 ASSERT(oldObj
->RefCount
> 0);
293 printf("BufferObj %p %d DECR to %d\n",
294 (void *) oldObj
, oldObj
->Name
, oldObj
->RefCount
);
296 deleteFlag
= (oldObj
->RefCount
== 0);
297 _glthread_UNLOCK_MUTEX(oldObj
->Mutex
);
301 /* some sanity checking: don't delete a buffer still in use */
303 /* unfortunately, these tests are invalid during context tear-down */
304 ASSERT(ctx
->Array
.ArrayBufferObj
!= bufObj
);
305 ASSERT(ctx
->Array
.ArrayObj
->ElementArrayBufferObj
!= bufObj
);
306 ASSERT(ctx
->Array
.ArrayObj
->Vertex
.BufferObj
!= bufObj
);
309 ASSERT(ctx
->Driver
.DeleteBuffer
);
310 ctx
->Driver
.DeleteBuffer(ctx
, oldObj
);
318 /* reference new buffer */
319 _glthread_LOCK_MUTEX(bufObj
->Mutex
);
320 if (bufObj
->RefCount
== 0) {
321 /* this buffer's being deleted (look just above) */
322 /* Not sure this can every really happen. Warn if it does. */
323 _mesa_problem(NULL
, "referencing deleted buffer object");
329 printf("BufferObj %p %d INCR to %d\n",
330 (void *) bufObj
, bufObj
->Name
, bufObj
->RefCount
);
334 _glthread_UNLOCK_MUTEX(bufObj
->Mutex
);
340 * Initialize a buffer object to default values.
343 _mesa_initialize_buffer_object( struct gl_context
*ctx
,
344 struct gl_buffer_object
*obj
,
345 GLuint name
, GLenum target
)
349 memset(obj
, 0, sizeof(struct gl_buffer_object
));
350 _glthread_INIT_MUTEX(obj
->Mutex
);
353 obj
->Usage
= GL_STATIC_DRAW_ARB
;
354 obj
->AccessFlags
= 0;
360 * Callback called from _mesa_HashWalk()
363 count_buffer_size(GLuint key
, void *data
, void *userData
)
365 const struct gl_buffer_object
*bufObj
=
366 (const struct gl_buffer_object
*) data
;
367 GLuint
*total
= (GLuint
*) userData
;
369 *total
= *total
+ bufObj
->Size
;
374 * Compute total size (in bytes) of all buffer objects for the given context.
375 * For debugging purposes.
378 _mesa_total_buffer_object_memory(struct gl_context
*ctx
)
382 _mesa_HashWalk(ctx
->Shared
->BufferObjects
, count_buffer_size
, &total
);
389 * Allocate space for and store data in a buffer object. Any data that was
390 * previously stored in the buffer object is lost. If \c data is \c NULL,
391 * memory will be allocated, but no copy will occur.
393 * This is the default callback for \c dd_function_table::BufferData()
394 * Note that all GL error checking will have been done already.
396 * \param ctx GL context.
397 * \param target Buffer object target on which to operate.
398 * \param size Size, in bytes, of the new data store.
399 * \param data Pointer to the data to store in the buffer object. This
400 * pointer may be \c NULL.
401 * \param usage Hints about how the data will be used.
402 * \param bufObj Object to be used.
404 * \return GL_TRUE for success, GL_FALSE for failure
405 * \sa glBufferDataARB, dd_function_table::BufferData.
408 _mesa_buffer_data( struct gl_context
*ctx
, GLenum target
, GLsizeiptrARB size
,
409 const GLvoid
* data
, GLenum usage
,
410 struct gl_buffer_object
* bufObj
)
414 (void) ctx
; (void) target
;
416 new_data
= _mesa_realloc( bufObj
->Data
, bufObj
->Size
, size
);
418 bufObj
->Data
= (GLubyte
*) new_data
;
420 bufObj
->Usage
= usage
;
423 memcpy( bufObj
->Data
, data
, size
);
435 * Replace data in a subrange of buffer object. If the data range
436 * specified by \c size + \c offset extends beyond the end of the buffer or
437 * if \c data is \c NULL, no copy is performed.
439 * This is the default callback for \c dd_function_table::BufferSubData()
440 * Note that all GL error checking will have been done already.
442 * \param ctx GL context.
443 * \param target Buffer object target on which to operate.
444 * \param offset Offset of the first byte to be modified.
445 * \param size Size, in bytes, of the data range.
446 * \param data Pointer to the data to store in the buffer object.
447 * \param bufObj Object to be used.
449 * \sa glBufferSubDataARB, dd_function_table::BufferSubData.
452 _mesa_buffer_subdata( struct gl_context
*ctx
, GLintptrARB offset
,
453 GLsizeiptrARB size
, const GLvoid
* data
,
454 struct gl_buffer_object
* bufObj
)
458 /* this should have been caught in _mesa_BufferSubData() */
459 ASSERT(size
+ offset
<= bufObj
->Size
);
462 memcpy( (GLubyte
*) bufObj
->Data
+ offset
, data
, size
);
468 * Retrieve data from a subrange of buffer object. If the data range
469 * specified by \c size + \c offset extends beyond the end of the buffer or
470 * if \c data is \c NULL, no copy is performed.
472 * This is the default callback for \c dd_function_table::GetBufferSubData()
473 * Note that all GL error checking will have been done already.
475 * \param ctx GL context.
476 * \param target Buffer object target on which to operate.
477 * \param offset Offset of the first byte to be fetched.
478 * \param size Size, in bytes, of the data range.
479 * \param data Destination for data
480 * \param bufObj Object to be used.
482 * \sa glBufferGetSubDataARB, dd_function_table::GetBufferSubData.
485 _mesa_buffer_get_subdata( struct gl_context
*ctx
, GLintptrARB offset
,
486 GLsizeiptrARB size
, GLvoid
* data
,
487 struct gl_buffer_object
* bufObj
)
491 if (bufObj
->Data
&& ((GLsizeiptrARB
) (size
+ offset
) <= bufObj
->Size
)) {
492 memcpy( data
, (GLubyte
*) bufObj
->Data
+ offset
, size
);
498 * Default fallback for \c dd_function_table::MapBufferRange().
499 * Called via glMapBufferRange().
502 _mesa_buffer_map_range( struct gl_context
*ctx
, GLintptr offset
,
503 GLsizeiptr length
, GLbitfield access
,
504 struct gl_buffer_object
*bufObj
)
507 assert(!_mesa_bufferobj_mapped(bufObj
));
508 /* Just return a direct pointer to the data */
509 bufObj
->Pointer
= bufObj
->Data
+ offset
;
510 bufObj
->Length
= length
;
511 bufObj
->Offset
= offset
;
512 bufObj
->AccessFlags
= access
;
513 return bufObj
->Pointer
;
518 * Default fallback for \c dd_function_table::FlushMappedBufferRange().
519 * Called via glFlushMappedBufferRange().
522 _mesa_buffer_flush_mapped_range( struct gl_context
*ctx
,
523 GLintptr offset
, GLsizeiptr length
,
524 struct gl_buffer_object
*obj
)
535 * Default callback for \c dd_function_table::MapBuffer().
537 * The input parameters will have been already tested for errors.
539 * \sa glUnmapBufferARB, dd_function_table::UnmapBuffer
542 _mesa_buffer_unmap( struct gl_context
*ctx
, struct gl_buffer_object
*bufObj
)
545 /* XXX we might assert here that bufObj->Pointer is non-null */
546 bufObj
->Pointer
= NULL
;
549 bufObj
->AccessFlags
= 0x0;
555 * Default fallback for \c dd_function_table::CopyBufferSubData().
556 * Called via glCopyBufferSubData().
559 _mesa_copy_buffer_subdata(struct gl_context
*ctx
,
560 struct gl_buffer_object
*src
,
561 struct gl_buffer_object
*dst
,
562 GLintptr readOffset
, GLintptr writeOffset
,
565 GLubyte
*srcPtr
, *dstPtr
;
567 /* the buffers should not be mapped */
568 assert(!_mesa_bufferobj_mapped(src
));
569 assert(!_mesa_bufferobj_mapped(dst
));
572 srcPtr
= dstPtr
= ctx
->Driver
.MapBufferRange(ctx
, 0, src
->Size
,
574 GL_MAP_WRITE_BIT
, src
);
579 srcPtr
+= readOffset
;
580 dstPtr
+= writeOffset
;
582 srcPtr
= ctx
->Driver
.MapBufferRange(ctx
, readOffset
, size
,
583 GL_MAP_READ_BIT
, src
);
584 dstPtr
= ctx
->Driver
.MapBufferRange(ctx
, writeOffset
, size
,
586 GL_MAP_INVALIDATE_RANGE_BIT
), dst
);
589 /* Note: the src and dst regions will never overlap. Trying to do so
590 * would generate GL_INVALID_VALUE earlier.
592 if (srcPtr
&& dstPtr
)
593 memcpy(dstPtr
, srcPtr
, size
);
595 ctx
->Driver
.UnmapBuffer(ctx
, src
);
597 ctx
->Driver
.UnmapBuffer(ctx
, dst
);
603 * Initialize the state associated with buffer objects
606 _mesa_init_buffer_objects( struct gl_context
*ctx
)
610 memset(&DummyBufferObject
, 0, sizeof(DummyBufferObject
));
611 _glthread_INIT_MUTEX(DummyBufferObject
.Mutex
);
612 DummyBufferObject
.RefCount
= 1000*1000*1000; /* never delete */
614 _mesa_reference_buffer_object(ctx
, &ctx
->Array
.ArrayBufferObj
,
615 ctx
->Shared
->NullBufferObj
);
617 _mesa_reference_buffer_object(ctx
, &ctx
->CopyReadBuffer
,
618 ctx
->Shared
->NullBufferObj
);
619 _mesa_reference_buffer_object(ctx
, &ctx
->CopyWriteBuffer
,
620 ctx
->Shared
->NullBufferObj
);
622 _mesa_reference_buffer_object(ctx
, &ctx
->UniformBuffer
,
623 ctx
->Shared
->NullBufferObj
);
625 for (i
= 0; i
< MAX_COMBINED_UNIFORM_BUFFERS
; i
++) {
626 _mesa_reference_buffer_object(ctx
,
627 &ctx
->UniformBufferBindings
[i
].BufferObject
,
628 ctx
->Shared
->NullBufferObj
);
629 ctx
->UniformBufferBindings
[i
].Offset
= -1;
630 ctx
->UniformBufferBindings
[i
].Size
= -1;
636 _mesa_free_buffer_objects( struct gl_context
*ctx
)
640 _mesa_reference_buffer_object(ctx
, &ctx
->Array
.ArrayBufferObj
, NULL
);
642 _mesa_reference_buffer_object(ctx
, &ctx
->CopyReadBuffer
, NULL
);
643 _mesa_reference_buffer_object(ctx
, &ctx
->CopyWriteBuffer
, NULL
);
645 _mesa_reference_buffer_object(ctx
, &ctx
->UniformBuffer
, NULL
);
647 for (i
= 0; i
< MAX_COMBINED_UNIFORM_BUFFERS
; i
++) {
648 _mesa_reference_buffer_object(ctx
,
649 &ctx
->UniformBufferBindings
[i
].BufferObject
,
655 handle_bind_buffer_gen(struct gl_context
*ctx
,
658 struct gl_buffer_object
**buf_handle
)
660 struct gl_buffer_object
*buf
= *buf_handle
;
662 if (!buf
&& ctx
->API
== API_OPENGL_CORE
) {
663 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glBindBuffer(non-gen name)");
667 if (!buf
|| buf
== &DummyBufferObject
) {
668 /* If this is a new buffer object id, or one which was generated but
669 * never used before, allocate a buffer object now.
671 ASSERT(ctx
->Driver
.NewBufferObject
);
672 buf
= ctx
->Driver
.NewBufferObject(ctx
, buffer
, target
);
674 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glBindBufferARB");
677 _mesa_HashInsert(ctx
->Shared
->BufferObjects
, buffer
, buf
);
685 * Bind the specified target to buffer for the specified context.
686 * Called by glBindBuffer() and other functions.
689 bind_buffer_object(struct gl_context
*ctx
, GLenum target
, GLuint buffer
)
691 struct gl_buffer_object
*oldBufObj
;
692 struct gl_buffer_object
*newBufObj
= NULL
;
693 struct gl_buffer_object
**bindTarget
= NULL
;
695 bindTarget
= get_buffer_target(ctx
, target
);
697 _mesa_error(ctx
, GL_INVALID_ENUM
, "glBindBufferARB(target 0x%x)", target
);
701 /* Get pointer to old buffer object (to be unbound) */
702 oldBufObj
= *bindTarget
;
703 if (oldBufObj
&& oldBufObj
->Name
== buffer
&& !oldBufObj
->DeletePending
)
704 return; /* rebinding the same buffer object- no change */
707 * Get pointer to new buffer object (newBufObj)
710 /* The spec says there's not a buffer object named 0, but we use
711 * one internally because it simplifies things.
713 newBufObj
= ctx
->Shared
->NullBufferObj
;
716 /* non-default buffer object */
717 newBufObj
= _mesa_lookup_bufferobj(ctx
, buffer
);
718 if (!handle_bind_buffer_gen(ctx
, target
, buffer
, &newBufObj
))
722 /* bind new buffer */
723 _mesa_reference_buffer_object(ctx
, bindTarget
, newBufObj
);
725 /* Pass BindBuffer call to device driver */
726 if (ctx
->Driver
.BindBuffer
)
727 ctx
->Driver
.BindBuffer( ctx
, target
, newBufObj
);
732 * Update the default buffer objects in the given context to reference those
733 * specified in the shared state and release those referencing the old
737 _mesa_update_default_objects_buffer_objects(struct gl_context
*ctx
)
739 /* Bind the NullBufferObj to remove references to those
740 * in the shared context hash table.
742 bind_buffer_object( ctx
, GL_ARRAY_BUFFER_ARB
, 0);
743 bind_buffer_object( ctx
, GL_ELEMENT_ARRAY_BUFFER_ARB
, 0);
744 bind_buffer_object( ctx
, GL_PIXEL_PACK_BUFFER_ARB
, 0);
745 bind_buffer_object( ctx
, GL_PIXEL_UNPACK_BUFFER_ARB
, 0);
751 * Return the gl_buffer_object for the given ID.
752 * Always return NULL for ID 0.
754 struct gl_buffer_object
*
755 _mesa_lookup_bufferobj(struct gl_context
*ctx
, GLuint buffer
)
760 return (struct gl_buffer_object
*)
761 _mesa_HashLookup(ctx
->Shared
->BufferObjects
, buffer
);
766 * If *ptr points to obj, set ptr = the Null/default buffer object.
767 * This is a helper for buffer object deletion.
768 * The GL spec says that deleting a buffer object causes it to get
769 * unbound from all arrays in the current context.
772 unbind(struct gl_context
*ctx
,
773 struct gl_buffer_object
**ptr
,
774 struct gl_buffer_object
*obj
)
777 _mesa_reference_buffer_object(ctx
, ptr
, ctx
->Shared
->NullBufferObj
);
783 * Plug default/fallback buffer object functions into the device
787 _mesa_init_buffer_object_functions(struct dd_function_table
*driver
)
789 /* GL_ARB_vertex/pixel_buffer_object */
790 driver
->NewBufferObject
= _mesa_new_buffer_object
;
791 driver
->DeleteBuffer
= _mesa_delete_buffer_object
;
792 driver
->BindBuffer
= NULL
;
793 driver
->BufferData
= _mesa_buffer_data
;
794 driver
->BufferSubData
= _mesa_buffer_subdata
;
795 driver
->GetBufferSubData
= _mesa_buffer_get_subdata
;
796 driver
->UnmapBuffer
= _mesa_buffer_unmap
;
798 /* GL_ARB_map_buffer_range */
799 driver
->MapBufferRange
= _mesa_buffer_map_range
;
800 driver
->FlushMappedBufferRange
= _mesa_buffer_flush_mapped_range
;
802 /* GL_ARB_copy_buffer */
803 driver
->CopyBufferSubData
= _mesa_copy_buffer_subdata
;
808 /**********************************************************************/
810 /**********************************************************************/
813 _mesa_BindBuffer(GLenum target
, GLuint buffer
)
815 GET_CURRENT_CONTEXT(ctx
);
817 if (MESA_VERBOSE
& VERBOSE_API
)
818 _mesa_debug(ctx
, "glBindBuffer(%s, %u)\n",
819 _mesa_lookup_enum_by_nr(target
), buffer
);
821 bind_buffer_object(ctx
, target
, buffer
);
826 * Delete a set of buffer objects.
828 * \param n Number of buffer objects to delete.
829 * \param ids Array of \c n buffer object IDs.
832 _mesa_DeleteBuffers(GLsizei n
, const GLuint
*ids
)
834 GET_CURRENT_CONTEXT(ctx
);
836 FLUSH_VERTICES(ctx
, 0);
839 _mesa_error(ctx
, GL_INVALID_VALUE
, "glDeleteBuffersARB(n)");
843 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
845 for (i
= 0; i
< n
; i
++) {
846 struct gl_buffer_object
*bufObj
= _mesa_lookup_bufferobj(ctx
, ids
[i
]);
848 struct gl_array_object
*arrayObj
= ctx
->Array
.ArrayObj
;
851 ASSERT(bufObj
->Name
== ids
[i
] || bufObj
== &DummyBufferObject
);
853 if (_mesa_bufferobj_mapped(bufObj
)) {
854 /* if mapped, unmap it now */
855 ctx
->Driver
.UnmapBuffer(ctx
, bufObj
);
856 bufObj
->AccessFlags
= 0;
857 bufObj
->Pointer
= NULL
;
860 /* unbind any vertex pointers bound to this buffer */
861 for (j
= 0; j
< Elements(arrayObj
->VertexAttrib
); j
++) {
862 unbind(ctx
, &arrayObj
->VertexAttrib
[j
].BufferObj
, bufObj
);
865 if (ctx
->Array
.ArrayBufferObj
== bufObj
) {
866 _mesa_BindBuffer( GL_ARRAY_BUFFER_ARB
, 0 );
868 if (arrayObj
->ElementArrayBufferObj
== bufObj
) {
869 _mesa_BindBuffer( GL_ELEMENT_ARRAY_BUFFER_ARB
, 0 );
872 /* unbind ARB_copy_buffer binding points */
873 if (ctx
->CopyReadBuffer
== bufObj
) {
874 _mesa_BindBuffer( GL_COPY_READ_BUFFER
, 0 );
876 if (ctx
->CopyWriteBuffer
== bufObj
) {
877 _mesa_BindBuffer( GL_COPY_WRITE_BUFFER
, 0 );
880 /* unbind transform feedback binding points */
881 if (ctx
->TransformFeedback
.CurrentBuffer
== bufObj
) {
882 _mesa_BindBuffer( GL_TRANSFORM_FEEDBACK_BUFFER
, 0 );
884 for (j
= 0; j
< MAX_FEEDBACK_BUFFERS
; j
++) {
885 if (ctx
->TransformFeedback
.CurrentObject
->Buffers
[j
] == bufObj
) {
886 _mesa_BindBufferBase( GL_TRANSFORM_FEEDBACK_BUFFER
, j
, 0 );
890 /* unbind UBO binding points */
891 for (j
= 0; j
< ctx
->Const
.MaxUniformBufferBindings
; j
++) {
892 if (ctx
->UniformBufferBindings
[j
].BufferObject
== bufObj
) {
893 _mesa_BindBufferBase( GL_UNIFORM_BUFFER
, j
, 0 );
897 if (ctx
->UniformBuffer
== bufObj
) {
898 _mesa_BindBuffer( GL_UNIFORM_BUFFER
, 0 );
901 /* unbind any pixel pack/unpack pointers bound to this buffer */
902 if (ctx
->Pack
.BufferObj
== bufObj
) {
903 _mesa_BindBuffer( GL_PIXEL_PACK_BUFFER_EXT
, 0 );
905 if (ctx
->Unpack
.BufferObj
== bufObj
) {
906 _mesa_BindBuffer( GL_PIXEL_UNPACK_BUFFER_EXT
, 0 );
909 if (ctx
->Texture
.BufferObject
== bufObj
) {
910 _mesa_BindBuffer( GL_TEXTURE_BUFFER
, 0 );
913 /* The ID is immediately freed for re-use */
914 _mesa_HashRemove(ctx
->Shared
->BufferObjects
, ids
[i
]);
915 /* Make sure we do not run into the classic ABA problem on bind.
916 * We don't want to allow re-binding a buffer object that's been
917 * "deleted" by glDeleteBuffers().
919 * The explicit rebinding to the default object in the current context
920 * prevents the above in the current context, but another context
921 * sharing the same objects might suffer from this problem.
922 * The alternative would be to do the hash lookup in any case on bind
923 * which would introduce more runtime overhead than this.
925 bufObj
->DeletePending
= GL_TRUE
;
926 _mesa_reference_buffer_object(ctx
, &bufObj
, NULL
);
930 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
935 * Generate a set of unique buffer object IDs and store them in \c buffer.
937 * \param n Number of IDs to generate.
938 * \param buffer Array of \c n locations to store the IDs.
941 _mesa_GenBuffers(GLsizei n
, GLuint
*buffer
)
943 GET_CURRENT_CONTEXT(ctx
);
947 if (MESA_VERBOSE
& VERBOSE_API
)
948 _mesa_debug(ctx
, "glGenBuffers(%d)\n", n
);
951 _mesa_error(ctx
, GL_INVALID_VALUE
, "glGenBuffersARB");
960 * This must be atomic (generation and allocation of buffer object IDs)
962 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
964 first
= _mesa_HashFindFreeKeyBlock(ctx
->Shared
->BufferObjects
, n
);
966 /* Insert the ID and pointer to dummy buffer object into hash table */
967 for (i
= 0; i
< n
; i
++) {
968 _mesa_HashInsert(ctx
->Shared
->BufferObjects
, first
+ i
,
970 buffer
[i
] = first
+ i
;
973 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
978 * Determine if ID is the name of a buffer object.
980 * \param id ID of the potential buffer object.
981 * \return \c GL_TRUE if \c id is the name of a buffer object,
982 * \c GL_FALSE otherwise.
985 _mesa_IsBuffer(GLuint id
)
987 struct gl_buffer_object
*bufObj
;
988 GET_CURRENT_CONTEXT(ctx
);
989 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, GL_FALSE
);
991 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
992 bufObj
= _mesa_lookup_bufferobj(ctx
, id
);
993 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
995 return bufObj
&& bufObj
!= &DummyBufferObject
;
1000 _mesa_BufferData(GLenum target
, GLsizeiptrARB size
,
1001 const GLvoid
* data
, GLenum usage
)
1003 GET_CURRENT_CONTEXT(ctx
);
1004 struct gl_buffer_object
*bufObj
;
1007 if (MESA_VERBOSE
& VERBOSE_API
)
1008 _mesa_debug(ctx
, "glBufferData(%s, %ld, %p, %s)\n",
1009 _mesa_lookup_enum_by_nr(target
),
1010 (long int) size
, data
,
1011 _mesa_lookup_enum_by_nr(usage
));
1014 _mesa_error(ctx
, GL_INVALID_VALUE
, "glBufferDataARB(size < 0)");
1019 case GL_STREAM_DRAW_ARB
:
1020 valid_usage
= (ctx
->API
!= API_OPENGLES
);
1023 case GL_STATIC_DRAW_ARB
:
1024 case GL_DYNAMIC_DRAW_ARB
:
1028 case GL_STREAM_READ_ARB
:
1029 case GL_STREAM_COPY_ARB
:
1030 case GL_STATIC_READ_ARB
:
1031 case GL_STATIC_COPY_ARB
:
1032 case GL_DYNAMIC_READ_ARB
:
1033 case GL_DYNAMIC_COPY_ARB
:
1034 valid_usage
= _mesa_is_desktop_gl(ctx
) || _mesa_is_gles3(ctx
);
1038 valid_usage
= false;
1043 _mesa_error(ctx
, GL_INVALID_ENUM
, "glBufferData(usage)");
1047 bufObj
= get_buffer(ctx
, "glBufferDataARB", target
);
1051 if (_mesa_bufferobj_mapped(bufObj
)) {
1052 /* Unmap the existing buffer. We'll replace it now. Not an error. */
1053 ctx
->Driver
.UnmapBuffer(ctx
, bufObj
);
1054 bufObj
->AccessFlags
= 0;
1055 ASSERT(bufObj
->Pointer
== NULL
);
1058 FLUSH_VERTICES(ctx
, _NEW_BUFFER_OBJECT
);
1060 bufObj
->Written
= GL_TRUE
;
1063 printf("glBufferDataARB(%u, sz %ld, from %p, usage 0x%x)\n",
1064 bufObj
->Name
, size
, data
, usage
);
1071 ASSERT(ctx
->Driver
.BufferData
);
1072 if (!ctx
->Driver
.BufferData( ctx
, target
, size
, data
, usage
, bufObj
)) {
1073 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glBufferDataARB()");
1079 _mesa_BufferSubData(GLenum target
, GLintptrARB offset
,
1080 GLsizeiptrARB size
, const GLvoid
* data
)
1082 GET_CURRENT_CONTEXT(ctx
);
1083 struct gl_buffer_object
*bufObj
;
1085 bufObj
= buffer_object_subdata_range_good( ctx
, target
, offset
, size
,
1086 "glBufferSubDataARB" );
1088 /* error already recorded */
1095 bufObj
->Written
= GL_TRUE
;
1097 ASSERT(ctx
->Driver
.BufferSubData
);
1098 ctx
->Driver
.BufferSubData( ctx
, offset
, size
, data
, bufObj
);
1103 _mesa_GetBufferSubData(GLenum target
, GLintptrARB offset
,
1104 GLsizeiptrARB size
, void * data
)
1106 GET_CURRENT_CONTEXT(ctx
);
1107 struct gl_buffer_object
*bufObj
;
1109 bufObj
= buffer_object_subdata_range_good( ctx
, target
, offset
, size
,
1110 "glGetBufferSubDataARB" );
1112 /* error already recorded */
1116 ASSERT(ctx
->Driver
.GetBufferSubData
);
1117 ctx
->Driver
.GetBufferSubData( ctx
, offset
, size
, data
, bufObj
);
1122 _mesa_MapBuffer(GLenum target
, GLenum access
)
1124 GET_CURRENT_CONTEXT(ctx
);
1125 struct gl_buffer_object
* bufObj
;
1126 GLbitfield accessFlags
;
1130 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, NULL
);
1133 case GL_READ_ONLY_ARB
:
1134 accessFlags
= GL_MAP_READ_BIT
;
1135 valid_access
= _mesa_is_desktop_gl(ctx
);
1137 case GL_WRITE_ONLY_ARB
:
1138 accessFlags
= GL_MAP_WRITE_BIT
;
1139 valid_access
= true;
1141 case GL_READ_WRITE_ARB
:
1142 accessFlags
= GL_MAP_READ_BIT
| GL_MAP_WRITE_BIT
;
1143 valid_access
= _mesa_is_desktop_gl(ctx
);
1146 valid_access
= false;
1150 if (!valid_access
) {
1151 _mesa_error(ctx
, GL_INVALID_ENUM
, "glMapBufferARB(access)");
1155 bufObj
= get_buffer(ctx
, "glMapBufferARB", target
);
1159 if (_mesa_bufferobj_mapped(bufObj
)) {
1160 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glMapBufferARB(already mapped)");
1164 if (!bufObj
->Size
) {
1165 _mesa_error(ctx
, GL_OUT_OF_MEMORY
,
1166 "glMapBuffer(buffer size = 0)");
1170 ASSERT(ctx
->Driver
.MapBufferRange
);
1171 map
= ctx
->Driver
.MapBufferRange(ctx
, 0, bufObj
->Size
, accessFlags
, bufObj
);
1173 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glMapBufferARB(map failed)");
1177 /* The driver callback should have set these fields.
1178 * This is important because other modules (like VBO) might call
1179 * the driver function directly.
1181 ASSERT(bufObj
->Pointer
== map
);
1182 ASSERT(bufObj
->Length
== bufObj
->Size
);
1183 ASSERT(bufObj
->Offset
== 0);
1184 bufObj
->AccessFlags
= accessFlags
;
1187 if (access
== GL_WRITE_ONLY_ARB
|| access
== GL_READ_WRITE_ARB
)
1188 bufObj
->Written
= GL_TRUE
;
1191 printf("glMapBufferARB(%u, sz %ld, access 0x%x)\n",
1192 bufObj
->Name
, bufObj
->Size
, access
);
1193 if (access
== GL_WRITE_ONLY_ARB
) {
1195 GLubyte
*b
= (GLubyte
*) bufObj
->Pointer
;
1196 for (i
= 0; i
< bufObj
->Size
; i
++)
1203 GLubyte
*buf
= (GLubyte
*) bufObj
->Pointer
;
1205 /* buffer is 100 bytes larger than requested, fill with magic value */
1206 for (i
= 0; i
< 100; i
++) {
1207 buf
[bufObj
->Size
- i
- 1] = 123;
1212 return bufObj
->Pointer
;
1216 GLboolean GLAPIENTRY
1217 _mesa_UnmapBuffer(GLenum target
)
1219 GET_CURRENT_CONTEXT(ctx
);
1220 struct gl_buffer_object
*bufObj
;
1221 GLboolean status
= GL_TRUE
;
1222 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, GL_FALSE
);
1224 bufObj
= get_buffer(ctx
, "glUnmapBufferARB", target
);
1228 if (!_mesa_bufferobj_mapped(bufObj
)) {
1229 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glUnmapBufferARB");
1234 if (bufObj
->Access
!= GL_READ_ONLY_ARB
) {
1235 GLubyte
*buf
= (GLubyte
*) bufObj
->Pointer
;
1237 /* check that last 100 bytes are still = magic value */
1238 for (i
= 0; i
< 100; i
++) {
1239 GLuint pos
= bufObj
->Size
- i
- 1;
1240 if (buf
[pos
] != 123) {
1241 _mesa_warning(ctx
, "Out of bounds buffer object write detected"
1242 " at position %d (value = %u)\n",
1250 if (bufObj
->AccessFlags
& GL_MAP_WRITE_BIT
) {
1251 GLuint i
, unchanged
= 0;
1252 GLubyte
*b
= (GLubyte
*) bufObj
->Pointer
;
1254 /* check which bytes changed */
1255 for (i
= 0; i
< bufObj
->Size
- 1; i
++) {
1256 if (b
[i
] == (i
& 0xff) && b
[i
+1] == ((i
+1) & 0xff)) {
1263 printf("glUnmapBufferARB(%u): %u of %ld unchanged, starting at %d\n",
1264 bufObj
->Name
, unchanged
, bufObj
->Size
, pos
);
1269 status
= ctx
->Driver
.UnmapBuffer( ctx
, bufObj
);
1270 bufObj
->AccessFlags
= 0;
1271 ASSERT(bufObj
->Pointer
== NULL
);
1272 ASSERT(bufObj
->Offset
== 0);
1273 ASSERT(bufObj
->Length
== 0);
1280 _mesa_GetBufferParameteriv(GLenum target
, GLenum pname
, GLint
*params
)
1282 GET_CURRENT_CONTEXT(ctx
);
1283 struct gl_buffer_object
*bufObj
;
1285 bufObj
= get_buffer(ctx
, "glGetBufferParameterivARB", target
);
1290 case GL_BUFFER_SIZE_ARB
:
1291 *params
= (GLint
) bufObj
->Size
;
1293 case GL_BUFFER_USAGE_ARB
:
1294 *params
= bufObj
->Usage
;
1296 case GL_BUFFER_ACCESS_ARB
:
1297 *params
= simplified_access_mode(ctx
, bufObj
->AccessFlags
);
1299 case GL_BUFFER_MAPPED_ARB
:
1300 *params
= _mesa_bufferobj_mapped(bufObj
);
1302 case GL_BUFFER_ACCESS_FLAGS
:
1303 if (!ctx
->Extensions
.ARB_map_buffer_range
)
1305 *params
= bufObj
->AccessFlags
;
1307 case GL_BUFFER_MAP_OFFSET
:
1308 if (!ctx
->Extensions
.ARB_map_buffer_range
)
1310 *params
= (GLint
) bufObj
->Offset
;
1312 case GL_BUFFER_MAP_LENGTH
:
1313 if (!ctx
->Extensions
.ARB_map_buffer_range
)
1315 *params
= (GLint
) bufObj
->Length
;
1318 ; /* fall-through */
1322 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetBufferParameterivARB(pname=%s)",
1323 _mesa_lookup_enum_by_nr(pname
));
1329 * This is pretty much a duplicate of GetBufferParameteriv() but the
1330 * GL_BUFFER_SIZE_ARB attribute will be 64-bits on a 64-bit system.
1333 _mesa_GetBufferParameteri64v(GLenum target
, GLenum pname
, GLint64
*params
)
1335 GET_CURRENT_CONTEXT(ctx
);
1336 struct gl_buffer_object
*bufObj
;
1338 bufObj
= get_buffer(ctx
, "glGetBufferParameteri64v", target
);
1343 case GL_BUFFER_SIZE_ARB
:
1344 *params
= bufObj
->Size
;
1346 case GL_BUFFER_USAGE_ARB
:
1347 *params
= bufObj
->Usage
;
1349 case GL_BUFFER_ACCESS_ARB
:
1350 *params
= simplified_access_mode(ctx
, bufObj
->AccessFlags
);
1352 case GL_BUFFER_ACCESS_FLAGS
:
1353 if (!ctx
->Extensions
.ARB_map_buffer_range
)
1355 *params
= bufObj
->AccessFlags
;
1357 case GL_BUFFER_MAPPED_ARB
:
1358 *params
= _mesa_bufferobj_mapped(bufObj
);
1360 case GL_BUFFER_MAP_OFFSET
:
1361 if (!ctx
->Extensions
.ARB_map_buffer_range
)
1363 *params
= bufObj
->Offset
;
1365 case GL_BUFFER_MAP_LENGTH
:
1366 if (!ctx
->Extensions
.ARB_map_buffer_range
)
1368 *params
= bufObj
->Length
;
1371 ; /* fall-through */
1375 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetBufferParameteri64v(pname=%s)",
1376 _mesa_lookup_enum_by_nr(pname
));
1381 _mesa_GetBufferPointerv(GLenum target
, GLenum pname
, GLvoid
**params
)
1383 GET_CURRENT_CONTEXT(ctx
);
1384 struct gl_buffer_object
* bufObj
;
1386 if (pname
!= GL_BUFFER_MAP_POINTER_ARB
) {
1387 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetBufferPointervARB(pname)");
1391 bufObj
= get_buffer(ctx
, "glGetBufferPointervARB", target
);
1395 *params
= bufObj
->Pointer
;
1400 _mesa_CopyBufferSubData(GLenum readTarget
, GLenum writeTarget
,
1401 GLintptr readOffset
, GLintptr writeOffset
,
1404 GET_CURRENT_CONTEXT(ctx
);
1405 struct gl_buffer_object
*src
, *dst
;
1407 src
= get_buffer(ctx
, "glCopyBufferSubData", readTarget
);
1411 dst
= get_buffer(ctx
, "glCopyBufferSubData", writeTarget
);
1415 if (_mesa_bufferobj_mapped(src
)) {
1416 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1417 "glCopyBufferSubData(readBuffer is mapped)");
1421 if (_mesa_bufferobj_mapped(dst
)) {
1422 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1423 "glCopyBufferSubData(writeBuffer is mapped)");
1427 if (readOffset
< 0) {
1428 _mesa_error(ctx
, GL_INVALID_VALUE
,
1429 "glCopyBufferSubData(readOffset = %d)", (int) readOffset
);
1433 if (writeOffset
< 0) {
1434 _mesa_error(ctx
, GL_INVALID_VALUE
,
1435 "glCopyBufferSubData(writeOffset = %d)", (int) writeOffset
);
1440 _mesa_error(ctx
, GL_INVALID_VALUE
,
1441 "glCopyBufferSubData(writeOffset = %d)", (int) size
);
1445 if (readOffset
+ size
> src
->Size
) {
1446 _mesa_error(ctx
, GL_INVALID_VALUE
,
1447 "glCopyBufferSubData(readOffset + size = %d)",
1448 (int) (readOffset
+ size
));
1452 if (writeOffset
+ size
> dst
->Size
) {
1453 _mesa_error(ctx
, GL_INVALID_VALUE
,
1454 "glCopyBufferSubData(writeOffset + size = %d)",
1455 (int) (writeOffset
+ size
));
1460 if (readOffset
+ size
<= writeOffset
) {
1463 else if (writeOffset
+ size
<= readOffset
) {
1467 /* overlapping src/dst is illegal */
1468 _mesa_error(ctx
, GL_INVALID_VALUE
,
1469 "glCopyBufferSubData(overlapping src/dst)");
1474 ctx
->Driver
.CopyBufferSubData(ctx
, src
, dst
, readOffset
, writeOffset
, size
);
1479 * See GL_ARB_map_buffer_range spec
1482 _mesa_MapBufferRange(GLenum target
, GLintptr offset
, GLsizeiptr length
,
1485 GET_CURRENT_CONTEXT(ctx
);
1486 struct gl_buffer_object
*bufObj
;
1489 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, NULL
);
1491 if (!ctx
->Extensions
.ARB_map_buffer_range
) {
1492 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1493 "glMapBufferRange(extension not supported)");
1498 _mesa_error(ctx
, GL_INVALID_VALUE
,
1499 "glMapBufferRange(offset = %ld)", (long)offset
);
1504 _mesa_error(ctx
, GL_INVALID_VALUE
,
1505 "glMapBufferRange(length = %ld)", (long)length
);
1509 /* Page 38 of the PDF of the OpenGL ES 3.0 spec says:
1511 * "An INVALID_OPERATION error is generated for any of the following
1514 * * <length> is zero."
1516 if (_mesa_is_gles(ctx
) && length
== 0) {
1517 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1518 "glMapBufferRange(length = 0)");
1522 if (access
& ~(GL_MAP_READ_BIT
|
1524 GL_MAP_INVALIDATE_RANGE_BIT
|
1525 GL_MAP_INVALIDATE_BUFFER_BIT
|
1526 GL_MAP_FLUSH_EXPLICIT_BIT
|
1527 GL_MAP_UNSYNCHRONIZED_BIT
)) {
1528 /* generate an error if any undefind bit is set */
1529 _mesa_error(ctx
, GL_INVALID_VALUE
, "glMapBufferRange(access)");
1533 if ((access
& (GL_MAP_READ_BIT
| GL_MAP_WRITE_BIT
)) == 0) {
1534 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1535 "glMapBufferRange(access indicates neither read or write)");
1539 if ((access
& GL_MAP_READ_BIT
) &&
1540 (access
& (GL_MAP_INVALIDATE_RANGE_BIT
|
1541 GL_MAP_INVALIDATE_BUFFER_BIT
|
1542 GL_MAP_UNSYNCHRONIZED_BIT
))) {
1543 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1544 "glMapBufferRange(invalid access flags)");
1548 if ((access
& GL_MAP_FLUSH_EXPLICIT_BIT
) &&
1549 ((access
& GL_MAP_WRITE_BIT
) == 0)) {
1550 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1551 "glMapBufferRange(invalid access flags)");
1555 bufObj
= get_buffer(ctx
, "glMapBufferRange", target
);
1559 if (offset
+ length
> bufObj
->Size
) {
1560 _mesa_error(ctx
, GL_INVALID_VALUE
,
1561 "glMapBufferRange(offset + length > size)");
1565 if (_mesa_bufferobj_mapped(bufObj
)) {
1566 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1567 "glMapBufferRange(buffer already mapped)");
1571 if (!bufObj
->Size
) {
1572 _mesa_error(ctx
, GL_OUT_OF_MEMORY
,
1573 "glMapBufferRange(buffer size = 0)");
1577 /* Mapping zero bytes should return a non-null pointer. */
1579 static long dummy
= 0;
1580 bufObj
->Pointer
= &dummy
;
1581 bufObj
->Length
= length
;
1582 bufObj
->Offset
= offset
;
1583 bufObj
->AccessFlags
= access
;
1584 return bufObj
->Pointer
;
1587 ASSERT(ctx
->Driver
.MapBufferRange
);
1588 map
= ctx
->Driver
.MapBufferRange(ctx
, offset
, length
, access
, bufObj
);
1590 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glMapBufferARB(map failed)");
1593 /* The driver callback should have set all these fields.
1594 * This is important because other modules (like VBO) might call
1595 * the driver function directly.
1597 ASSERT(bufObj
->Pointer
== map
);
1598 ASSERT(bufObj
->Length
== length
);
1599 ASSERT(bufObj
->Offset
== offset
);
1600 ASSERT(bufObj
->AccessFlags
== access
);
1608 * See GL_ARB_map_buffer_range spec
1611 _mesa_FlushMappedBufferRange(GLenum target
, GLintptr offset
, GLsizeiptr length
)
1613 GET_CURRENT_CONTEXT(ctx
);
1614 struct gl_buffer_object
*bufObj
;
1616 if (!ctx
->Extensions
.ARB_map_buffer_range
) {
1617 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1618 "glFlushMappedBufferRange(extension not supported)");
1623 _mesa_error(ctx
, GL_INVALID_VALUE
,
1624 "glFlushMappedBufferRange(offset = %ld)", (long)offset
);
1629 _mesa_error(ctx
, GL_INVALID_VALUE
,
1630 "glFlushMappedBufferRange(length = %ld)", (long)length
);
1634 bufObj
= get_buffer(ctx
, "glFlushMappedBufferRange", target
);
1638 if (!_mesa_bufferobj_mapped(bufObj
)) {
1639 /* buffer is not mapped */
1640 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1641 "glFlushMappedBufferRange(buffer is not mapped)");
1645 if ((bufObj
->AccessFlags
& GL_MAP_FLUSH_EXPLICIT_BIT
) == 0) {
1646 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1647 "glFlushMappedBufferRange(GL_MAP_FLUSH_EXPLICIT_BIT not set)");
1651 if (offset
+ length
> bufObj
->Length
) {
1652 _mesa_error(ctx
, GL_INVALID_VALUE
,
1653 "glFlushMappedBufferRange(offset %ld + length %ld > mapped length %ld)",
1654 (long)offset
, (long)length
, (long)bufObj
->Length
);
1658 ASSERT(bufObj
->AccessFlags
& GL_MAP_WRITE_BIT
);
1660 if (ctx
->Driver
.FlushMappedBufferRange
)
1661 ctx
->Driver
.FlushMappedBufferRange(ctx
, offset
, length
, bufObj
);
1666 buffer_object_purgeable(struct gl_context
*ctx
, GLuint name
, GLenum option
)
1668 struct gl_buffer_object
*bufObj
;
1671 bufObj
= _mesa_lookup_bufferobj(ctx
, name
);
1673 _mesa_error(ctx
, GL_INVALID_VALUE
,
1674 "glObjectPurgeable(name = 0x%x)", name
);
1677 if (!_mesa_is_bufferobj(bufObj
)) {
1678 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glObjectPurgeable(buffer 0)" );
1682 if (bufObj
->Purgeable
) {
1683 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1684 "glObjectPurgeable(name = 0x%x) is already purgeable", name
);
1685 return GL_VOLATILE_APPLE
;
1688 bufObj
->Purgeable
= GL_TRUE
;
1690 retval
= GL_VOLATILE_APPLE
;
1691 if (ctx
->Driver
.BufferObjectPurgeable
)
1692 retval
= ctx
->Driver
.BufferObjectPurgeable(ctx
, bufObj
, option
);
1699 renderbuffer_purgeable(struct gl_context
*ctx
, GLuint name
, GLenum option
)
1701 struct gl_renderbuffer
*bufObj
;
1704 bufObj
= _mesa_lookup_renderbuffer(ctx
, name
);
1706 _mesa_error(ctx
, GL_INVALID_VALUE
,
1707 "glObjectUnpurgeable(name = 0x%x)", name
);
1711 if (bufObj
->Purgeable
) {
1712 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1713 "glObjectPurgeable(name = 0x%x) is already purgeable", name
);
1714 return GL_VOLATILE_APPLE
;
1717 bufObj
->Purgeable
= GL_TRUE
;
1719 retval
= GL_VOLATILE_APPLE
;
1720 if (ctx
->Driver
.RenderObjectPurgeable
)
1721 retval
= ctx
->Driver
.RenderObjectPurgeable(ctx
, bufObj
, option
);
1728 texture_object_purgeable(struct gl_context
*ctx
, GLuint name
, GLenum option
)
1730 struct gl_texture_object
*bufObj
;
1733 bufObj
= _mesa_lookup_texture(ctx
, name
);
1735 _mesa_error(ctx
, GL_INVALID_VALUE
,
1736 "glObjectPurgeable(name = 0x%x)", name
);
1740 if (bufObj
->Purgeable
) {
1741 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1742 "glObjectPurgeable(name = 0x%x) is already purgeable", name
);
1743 return GL_VOLATILE_APPLE
;
1746 bufObj
->Purgeable
= GL_TRUE
;
1748 retval
= GL_VOLATILE_APPLE
;
1749 if (ctx
->Driver
.TextureObjectPurgeable
)
1750 retval
= ctx
->Driver
.TextureObjectPurgeable(ctx
, bufObj
, option
);
1757 _mesa_ObjectPurgeableAPPLE(GLenum objectType
, GLuint name
, GLenum option
)
1761 GET_CURRENT_CONTEXT(ctx
);
1762 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, 0);
1765 _mesa_error(ctx
, GL_INVALID_VALUE
,
1766 "glObjectPurgeable(name = 0x%x)", name
);
1771 case GL_VOLATILE_APPLE
:
1772 case GL_RELEASED_APPLE
:
1776 _mesa_error(ctx
, GL_INVALID_ENUM
,
1777 "glObjectPurgeable(name = 0x%x) invalid option: %d",
1782 switch (objectType
) {
1784 retval
= texture_object_purgeable(ctx
, name
, option
);
1786 case GL_RENDERBUFFER_EXT
:
1787 retval
= renderbuffer_purgeable(ctx
, name
, option
);
1789 case GL_BUFFER_OBJECT_APPLE
:
1790 retval
= buffer_object_purgeable(ctx
, name
, option
);
1793 _mesa_error(ctx
, GL_INVALID_ENUM
,
1794 "glObjectPurgeable(name = 0x%x) invalid type: %d",
1799 /* In strict conformance to the spec, we must only return VOLATILE when
1800 * when passed the VOLATILE option. Madness.
1802 * XXX First fix the spec, then fix me.
1804 return option
== GL_VOLATILE_APPLE
? GL_VOLATILE_APPLE
: retval
;
1809 buffer_object_unpurgeable(struct gl_context
*ctx
, GLuint name
, GLenum option
)
1811 struct gl_buffer_object
*bufObj
;
1814 bufObj
= _mesa_lookup_bufferobj(ctx
, name
);
1816 _mesa_error(ctx
, GL_INVALID_VALUE
,
1817 "glObjectUnpurgeable(name = 0x%x)", name
);
1821 if (! bufObj
->Purgeable
) {
1822 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1823 "glObjectUnpurgeable(name = 0x%x) object is "
1824 " already \"unpurged\"", name
);
1828 bufObj
->Purgeable
= GL_FALSE
;
1831 if (ctx
->Driver
.BufferObjectUnpurgeable
)
1832 retval
= ctx
->Driver
.BufferObjectUnpurgeable(ctx
, bufObj
, option
);
1839 renderbuffer_unpurgeable(struct gl_context
*ctx
, GLuint name
, GLenum option
)
1841 struct gl_renderbuffer
*bufObj
;
1844 bufObj
= _mesa_lookup_renderbuffer(ctx
, name
);
1846 _mesa_error(ctx
, GL_INVALID_VALUE
,
1847 "glObjectUnpurgeable(name = 0x%x)", name
);
1851 if (! bufObj
->Purgeable
) {
1852 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1853 "glObjectUnpurgeable(name = 0x%x) object is "
1854 " already \"unpurged\"", name
);
1858 bufObj
->Purgeable
= GL_FALSE
;
1861 if (ctx
->Driver
.RenderObjectUnpurgeable
)
1862 retval
= ctx
->Driver
.RenderObjectUnpurgeable(ctx
, bufObj
, option
);
1869 texture_object_unpurgeable(struct gl_context
*ctx
, GLuint name
, GLenum option
)
1871 struct gl_texture_object
*bufObj
;
1874 bufObj
= _mesa_lookup_texture(ctx
, name
);
1876 _mesa_error(ctx
, GL_INVALID_VALUE
,
1877 "glObjectUnpurgeable(name = 0x%x)", name
);
1881 if (! bufObj
->Purgeable
) {
1882 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1883 "glObjectUnpurgeable(name = 0x%x) object is"
1884 " already \"unpurged\"", name
);
1888 bufObj
->Purgeable
= GL_FALSE
;
1891 if (ctx
->Driver
.TextureObjectUnpurgeable
)
1892 retval
= ctx
->Driver
.TextureObjectUnpurgeable(ctx
, bufObj
, option
);
1899 _mesa_ObjectUnpurgeableAPPLE(GLenum objectType
, GLuint name
, GLenum option
)
1901 GET_CURRENT_CONTEXT(ctx
);
1902 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, 0);
1905 _mesa_error(ctx
, GL_INVALID_VALUE
,
1906 "glObjectUnpurgeable(name = 0x%x)", name
);
1911 case GL_RETAINED_APPLE
:
1912 case GL_UNDEFINED_APPLE
:
1916 _mesa_error(ctx
, GL_INVALID_ENUM
,
1917 "glObjectUnpurgeable(name = 0x%x) invalid option: %d",
1922 switch (objectType
) {
1923 case GL_BUFFER_OBJECT_APPLE
:
1924 return buffer_object_unpurgeable(ctx
, name
, option
);
1926 return texture_object_unpurgeable(ctx
, name
, option
);
1927 case GL_RENDERBUFFER_EXT
:
1928 return renderbuffer_unpurgeable(ctx
, name
, option
);
1930 _mesa_error(ctx
, GL_INVALID_ENUM
,
1931 "glObjectUnpurgeable(name = 0x%x) invalid type: %d",
1939 get_buffer_object_parameteriv(struct gl_context
*ctx
, GLuint name
,
1940 GLenum pname
, GLint
*params
)
1942 struct gl_buffer_object
*bufObj
= _mesa_lookup_bufferobj(ctx
, name
);
1944 _mesa_error(ctx
, GL_INVALID_VALUE
,
1945 "glGetObjectParameteriv(name = 0x%x) invalid object", name
);
1950 case GL_PURGEABLE_APPLE
:
1951 *params
= bufObj
->Purgeable
;
1954 _mesa_error(ctx
, GL_INVALID_ENUM
,
1955 "glGetObjectParameteriv(name = 0x%x) invalid enum: %d",
1963 get_renderbuffer_parameteriv(struct gl_context
*ctx
, GLuint name
,
1964 GLenum pname
, GLint
*params
)
1966 struct gl_renderbuffer
*rb
= _mesa_lookup_renderbuffer(ctx
, name
);
1968 _mesa_error(ctx
, GL_INVALID_VALUE
,
1969 "glObjectUnpurgeable(name = 0x%x)", name
);
1974 case GL_PURGEABLE_APPLE
:
1975 *params
= rb
->Purgeable
;
1978 _mesa_error(ctx
, GL_INVALID_ENUM
,
1979 "glGetObjectParameteriv(name = 0x%x) invalid enum: %d",
1987 get_texture_object_parameteriv(struct gl_context
*ctx
, GLuint name
,
1988 GLenum pname
, GLint
*params
)
1990 struct gl_texture_object
*texObj
= _mesa_lookup_texture(ctx
, name
);
1992 _mesa_error(ctx
, GL_INVALID_VALUE
,
1993 "glObjectUnpurgeable(name = 0x%x)", name
);
1998 case GL_PURGEABLE_APPLE
:
1999 *params
= texObj
->Purgeable
;
2002 _mesa_error(ctx
, GL_INVALID_ENUM
,
2003 "glGetObjectParameteriv(name = 0x%x) invalid enum: %d",
2011 _mesa_GetObjectParameterivAPPLE(GLenum objectType
, GLuint name
, GLenum pname
,
2014 GET_CURRENT_CONTEXT(ctx
);
2017 _mesa_error(ctx
, GL_INVALID_VALUE
,
2018 "glGetObjectParameteriv(name = 0x%x)", name
);
2022 switch (objectType
) {
2024 get_texture_object_parameteriv(ctx
, name
, pname
, params
);
2026 case GL_BUFFER_OBJECT_APPLE
:
2027 get_buffer_object_parameteriv(ctx
, name
, pname
, params
);
2029 case GL_RENDERBUFFER_EXT
:
2030 get_renderbuffer_parameteriv(ctx
, name
, pname
, params
);
2033 _mesa_error(ctx
, GL_INVALID_ENUM
,
2034 "glGetObjectParameteriv(name = 0x%x) invalid type: %d",
2040 set_ubo_binding(struct gl_context
*ctx
,
2042 struct gl_buffer_object
*bufObj
,
2047 struct gl_uniform_buffer_binding
*binding
;
2049 binding
= &ctx
->UniformBufferBindings
[index
];
2050 if (binding
->BufferObject
== bufObj
&&
2051 binding
->Offset
== offset
&&
2052 binding
->Size
== size
&&
2053 binding
->AutomaticSize
== autoSize
) {
2057 FLUSH_VERTICES(ctx
, 0);
2058 ctx
->NewDriverState
|= ctx
->DriverFlags
.NewUniformBuffer
;
2060 _mesa_reference_buffer_object(ctx
, &binding
->BufferObject
, bufObj
);
2061 binding
->Offset
= offset
;
2062 binding
->Size
= size
;
2063 binding
->AutomaticSize
= autoSize
;
2067 * Bind a region of a buffer object to a uniform block binding point.
2068 * \param index the uniform buffer binding point index
2069 * \param bufObj the buffer object
2070 * \param offset offset to the start of buffer object region
2071 * \param size size of the buffer object region
2074 bind_buffer_range_uniform_buffer(struct gl_context
*ctx
,
2076 struct gl_buffer_object
*bufObj
,
2080 if (index
>= ctx
->Const
.MaxUniformBufferBindings
) {
2081 _mesa_error(ctx
, GL_INVALID_VALUE
, "glBindBufferRange(index=%d)", index
);
2085 if (offset
& (ctx
->Const
.UniformBufferOffsetAlignment
- 1)) {
2086 _mesa_error(ctx
, GL_INVALID_VALUE
,
2087 "glBindBufferRange(offset misalgned %d/%d)", (int) offset
,
2088 ctx
->Const
.UniformBufferOffsetAlignment
);
2092 if (bufObj
== ctx
->Shared
->NullBufferObj
) {
2097 _mesa_reference_buffer_object(ctx
, &ctx
->UniformBuffer
, bufObj
);
2098 set_ubo_binding(ctx
, index
, bufObj
, offset
, size
, GL_FALSE
);
2103 * Bind a buffer object to a uniform block binding point.
2104 * As above, but offset = 0.
2107 bind_buffer_base_uniform_buffer(struct gl_context
*ctx
,
2109 struct gl_buffer_object
*bufObj
)
2111 if (index
>= ctx
->Const
.MaxUniformBufferBindings
) {
2112 _mesa_error(ctx
, GL_INVALID_VALUE
, "glBindBufferBase(index=%d)", index
);
2116 _mesa_reference_buffer_object(ctx
, &ctx
->UniformBuffer
, bufObj
);
2117 if (bufObj
== ctx
->Shared
->NullBufferObj
)
2118 set_ubo_binding(ctx
, index
, bufObj
, -1, -1, GL_TRUE
);
2120 set_ubo_binding(ctx
, index
, bufObj
, 0, 0, GL_TRUE
);
2124 _mesa_BindBufferRange(GLenum target
, GLuint index
,
2125 GLuint buffer
, GLintptr offset
, GLsizeiptr size
)
2127 GET_CURRENT_CONTEXT(ctx
);
2128 struct gl_buffer_object
*bufObj
;
2131 bufObj
= ctx
->Shared
->NullBufferObj
;
2133 bufObj
= _mesa_lookup_bufferobj(ctx
, buffer
);
2135 if (!handle_bind_buffer_gen(ctx
, target
, buffer
, &bufObj
))
2139 _mesa_error(ctx
, GL_INVALID_OPERATION
,
2140 "glBindBufferRange(invalid buffer=%u)", buffer
);
2146 _mesa_error(ctx
, GL_INVALID_VALUE
, "glBindBufferRange(size=%d)",
2153 case GL_TRANSFORM_FEEDBACK_BUFFER
:
2154 _mesa_bind_buffer_range_transform_feedback(ctx
, index
, bufObj
,
2157 case GL_UNIFORM_BUFFER
:
2158 bind_buffer_range_uniform_buffer(ctx
, index
, bufObj
, offset
, size
);
2161 _mesa_error(ctx
, GL_INVALID_ENUM
, "glBindBufferRange(target)");
2167 _mesa_BindBufferBase(GLenum target
, GLuint index
, GLuint buffer
)
2169 GET_CURRENT_CONTEXT(ctx
);
2170 struct gl_buffer_object
*bufObj
;
2173 bufObj
= ctx
->Shared
->NullBufferObj
;
2175 bufObj
= _mesa_lookup_bufferobj(ctx
, buffer
);
2177 if (!handle_bind_buffer_gen(ctx
, target
, buffer
, &bufObj
))
2181 _mesa_error(ctx
, GL_INVALID_OPERATION
,
2182 "glBindBufferBase(invalid buffer=%u)", buffer
);
2186 /* Note that there's some oddness in the GL 3.1-GL 3.3 specifications with
2187 * regards to BindBufferBase. It says (GL 3.1 core spec, page 63):
2189 * "BindBufferBase is equivalent to calling BindBufferRange with offset
2190 * zero and size equal to the size of buffer."
2192 * but it says for glGetIntegeri_v (GL 3.1 core spec, page 230):
2194 * "If the parameter (starting offset or size) was not specified when the
2195 * buffer object was bound, zero is returned."
2197 * What happens if the size of the buffer changes? Does the size of the
2198 * buffer at the moment glBindBufferBase was called still play a role, like
2199 * the first quote would imply, or is the size meaningless in the
2200 * glBindBufferBase case like the second quote would suggest? The GL 4.1
2201 * core spec page 45 says:
2203 * "It is equivalent to calling BindBufferRange with offset zero, while
2204 * size is determined by the size of the bound buffer at the time the
2207 * My interpretation is that the GL 4.1 spec was a clarification of the
2208 * behavior, not a change. In particular, this choice will only make
2209 * rendering work in cases where it would have had undefined results.
2213 case GL_TRANSFORM_FEEDBACK_BUFFER
:
2214 _mesa_bind_buffer_base_transform_feedback(ctx
, index
, bufObj
);
2216 case GL_UNIFORM_BUFFER
:
2217 bind_buffer_base_uniform_buffer(ctx
, index
, bufObj
);
2220 _mesa_error(ctx
, GL_INVALID_ENUM
, "glBindBufferBase(target)");
2226 _mesa_InvalidateBufferSubData(GLuint buffer
, GLintptr offset
,
2229 GET_CURRENT_CONTEXT(ctx
);
2230 struct gl_buffer_object
*bufObj
;
2231 const GLintptr end
= offset
+ length
;
2233 bufObj
= _mesa_lookup_bufferobj(ctx
, buffer
);
2235 _mesa_error(ctx
, GL_INVALID_VALUE
,
2236 "glInvalidateBufferSubData(name = 0x%x) invalid object",
2241 /* The GL_ARB_invalidate_subdata spec says:
2243 * "An INVALID_VALUE error is generated if <offset> or <length> is
2244 * negative, or if <offset> + <length> is greater than the value of
2247 if (end
< 0 || end
> bufObj
->Size
) {
2248 _mesa_error(ctx
, GL_INVALID_VALUE
,
2249 "glInvalidateBufferSubData(invalid offset or length)");
2253 /* The GL_ARB_invalidate_subdata spec says:
2255 * "An INVALID_OPERATION error is generated if the buffer is currently
2256 * mapped by MapBuffer, or if the invalidate range intersects the range
2257 * currently mapped by MapBufferRange."
2259 if (_mesa_bufferobj_mapped(bufObj
)) {
2260 const GLintptr mapEnd
= bufObj
->Offset
+ bufObj
->Length
;
2262 /* The regions do not overlap if and only if the end of the discard
2263 * region is before the mapped region or the start of the discard region
2264 * is after the mapped region.
2266 * Note that 'end' and 'mapEnd' are the first byte *after* the discard
2267 * region and the mapped region, repsectively. It is okay for that byte
2268 * to be mapped (for 'end') or discarded (for 'mapEnd').
2270 if (!(end
<= bufObj
->Offset
|| offset
>= mapEnd
)) {
2271 _mesa_error(ctx
, GL_INVALID_OPERATION
,
2272 "glInvalidateBufferSubData(intersection with mapped "
2278 /* We don't actually do anything for this yet. Just return after
2279 * validating the parameters and generating the required errors.
2285 _mesa_InvalidateBufferData(GLuint buffer
)
2287 GET_CURRENT_CONTEXT(ctx
);
2288 struct gl_buffer_object
*bufObj
;
2290 bufObj
= _mesa_lookup_bufferobj(ctx
, buffer
);
2292 _mesa_error(ctx
, GL_INVALID_VALUE
,
2293 "glInvalidateBufferData(name = 0x%x) invalid object",
2298 /* The GL_ARB_invalidate_subdata spec says:
2300 * "An INVALID_OPERATION error is generated if the buffer is currently
2301 * mapped by MapBuffer, or if the invalidate range intersects the range
2302 * currently mapped by MapBufferRange."
2304 if (_mesa_bufferobj_mapped(bufObj
)) {
2305 _mesa_error(ctx
, GL_INVALID_OPERATION
,
2306 "glInvalidateBufferData(intersection with mapped "
2311 /* We don't actually do anything for this yet. Just return after
2312 * validating the parameters and generating the required errors.