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 * 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
40 #include "bufferobj.h"
42 #include "mfeatures.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 (_mesa_is_desktop_gl(ctx
)
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
);
139 static inline GLbitfield
140 default_access_mode(const struct gl_context
*ctx
)
142 /* Table 2.6 on page 31 (page 44 of the PDF) of the OpenGL 1.5 spec says:
144 * Name Type Initial Value Legal Values
146 * BUFFER_ACCESS enum READ_WRITE READ_ONLY, WRITE_ONLY
149 * However, table 6.8 in the GL_OES_mapbuffer extension says:
151 * Get Value Type Get Command Value Description
152 * --------- ---- ----------- ----- -----------
153 * BUFFER_ACCESS_OES Z1 GetBufferParameteriv WRITE_ONLY_OES buffer map flag
155 * The difference is because GL_OES_mapbuffer only supports mapping buffers
158 return _mesa_is_gles(ctx
)
159 ? GL_MAP_WRITE_BIT
: (GL_MAP_READ_BIT
| GL_MAP_WRITE_BIT
);
164 * Convert a GLbitfield describing the mapped buffer access flags
165 * into one of GL_READ_WRITE, GL_READ_ONLY, or GL_WRITE_ONLY.
168 simplified_access_mode(GLbitfield access
)
170 const GLbitfield rwFlags
= GL_MAP_READ_BIT
| GL_MAP_WRITE_BIT
;
171 if ((access
& rwFlags
) == rwFlags
)
172 return GL_READ_WRITE
;
173 if ((access
& GL_MAP_READ_BIT
) == GL_MAP_READ_BIT
)
175 if ((access
& GL_MAP_WRITE_BIT
) == GL_MAP_WRITE_BIT
)
176 return GL_WRITE_ONLY
;
177 return GL_READ_WRITE
; /* this should never happen, but no big deal */
182 * Tests the subdata range parameters and sets the GL error code for
183 * \c glBufferSubDataARB and \c glGetBufferSubDataARB.
185 * \param ctx GL context.
186 * \param target Buffer object target on which to operate.
187 * \param offset Offset of the first byte of the subdata range.
188 * \param size Size, in bytes, of the subdata range.
189 * \param caller Name of calling function for recording errors.
190 * \return A pointer to the buffer object bound to \c target in the
191 * specified context or \c NULL if any of the parameter or state
192 * conditions for \c glBufferSubDataARB or \c glGetBufferSubDataARB
195 * \sa glBufferSubDataARB, glGetBufferSubDataARB
197 static struct gl_buffer_object
*
198 buffer_object_subdata_range_good( struct gl_context
* ctx
, GLenum target
,
199 GLintptrARB offset
, GLsizeiptrARB size
,
202 struct gl_buffer_object
*bufObj
;
205 _mesa_error(ctx
, GL_INVALID_VALUE
, "%s(size < 0)", caller
);
210 _mesa_error(ctx
, GL_INVALID_VALUE
, "%s(offset < 0)", caller
);
214 bufObj
= get_buffer(ctx
, caller
, target
);
218 if (offset
+ size
> bufObj
->Size
) {
219 _mesa_error(ctx
, GL_INVALID_VALUE
,
220 "%s(offset %lu + size %lu > buffer size %lu)", caller
,
221 (unsigned long) offset
,
222 (unsigned long) size
,
223 (unsigned long) bufObj
->Size
);
226 if (_mesa_bufferobj_mapped(bufObj
)) {
227 /* Buffer is currently mapped */
228 _mesa_error(ctx
, GL_INVALID_OPERATION
, "%s", caller
);
237 * Allocate and initialize a new buffer object.
239 * Default callback for the \c dd_function_table::NewBufferObject() hook.
241 static struct gl_buffer_object
*
242 _mesa_new_buffer_object( struct gl_context
*ctx
, GLuint name
, GLenum target
)
244 struct gl_buffer_object
*obj
;
248 obj
= MALLOC_STRUCT(gl_buffer_object
);
249 _mesa_initialize_buffer_object(ctx
, obj
, name
, target
);
255 * Delete a buffer object.
257 * Default callback for the \c dd_function_table::DeleteBuffer() hook.
260 _mesa_delete_buffer_object(struct gl_context
*ctx
,
261 struct gl_buffer_object
*bufObj
)
267 /* assign strange values here to help w/ debugging */
268 bufObj
->RefCount
= -1000;
271 _glthread_DESTROY_MUTEX(bufObj
->Mutex
);
278 * Set ptr to bufObj w/ reference counting.
279 * This is normally only called from the _mesa_reference_buffer_object() macro
280 * when there's a real pointer change.
283 _mesa_reference_buffer_object_(struct gl_context
*ctx
,
284 struct gl_buffer_object
**ptr
,
285 struct gl_buffer_object
*bufObj
)
288 /* Unreference the old buffer */
289 GLboolean deleteFlag
= GL_FALSE
;
290 struct gl_buffer_object
*oldObj
= *ptr
;
292 _glthread_LOCK_MUTEX(oldObj
->Mutex
);
293 ASSERT(oldObj
->RefCount
> 0);
296 printf("BufferObj %p %d DECR to %d\n",
297 (void *) oldObj
, oldObj
->Name
, oldObj
->RefCount
);
299 deleteFlag
= (oldObj
->RefCount
== 0);
300 _glthread_UNLOCK_MUTEX(oldObj
->Mutex
);
304 /* some sanity checking: don't delete a buffer still in use */
306 /* unfortunately, these tests are invalid during context tear-down */
307 ASSERT(ctx
->Array
.ArrayBufferObj
!= bufObj
);
308 ASSERT(ctx
->Array
.ArrayObj
->ElementArrayBufferObj
!= bufObj
);
309 ASSERT(ctx
->Array
.ArrayObj
->Vertex
.BufferObj
!= bufObj
);
312 ASSERT(ctx
->Driver
.DeleteBuffer
);
313 ctx
->Driver
.DeleteBuffer(ctx
, oldObj
);
321 /* reference new buffer */
322 _glthread_LOCK_MUTEX(bufObj
->Mutex
);
323 if (bufObj
->RefCount
== 0) {
324 /* this buffer's being deleted (look just above) */
325 /* Not sure this can every really happen. Warn if it does. */
326 _mesa_problem(NULL
, "referencing deleted buffer object");
332 printf("BufferObj %p %d INCR to %d\n",
333 (void *) bufObj
, bufObj
->Name
, bufObj
->RefCount
);
337 _glthread_UNLOCK_MUTEX(bufObj
->Mutex
);
343 * Initialize a buffer object to default values.
346 _mesa_initialize_buffer_object( struct gl_context
*ctx
,
347 struct gl_buffer_object
*obj
,
348 GLuint name
, GLenum target
)
352 memset(obj
, 0, sizeof(struct gl_buffer_object
));
353 _glthread_INIT_MUTEX(obj
->Mutex
);
356 obj
->Usage
= GL_STATIC_DRAW_ARB
;
357 obj
->AccessFlags
= default_access_mode(ctx
);
363 * Callback called from _mesa_HashWalk()
366 count_buffer_size(GLuint key
, void *data
, void *userData
)
368 const struct gl_buffer_object
*bufObj
=
369 (const struct gl_buffer_object
*) data
;
370 GLuint
*total
= (GLuint
*) userData
;
372 *total
= *total
+ bufObj
->Size
;
377 * Compute total size (in bytes) of all buffer objects for the given context.
378 * For debugging purposes.
381 _mesa_total_buffer_object_memory(struct gl_context
*ctx
)
385 _mesa_HashWalk(ctx
->Shared
->BufferObjects
, count_buffer_size
, &total
);
392 * Allocate space for and store data in a buffer object. Any data that was
393 * previously stored in the buffer object is lost. If \c data is \c NULL,
394 * memory will be allocated, but no copy will occur.
396 * This is the default callback for \c dd_function_table::BufferData()
397 * Note that all GL error checking will have been done already.
399 * \param ctx GL context.
400 * \param target Buffer object target on which to operate.
401 * \param size Size, in bytes, of the new data store.
402 * \param data Pointer to the data to store in the buffer object. This
403 * pointer may be \c NULL.
404 * \param usage Hints about how the data will be used.
405 * \param bufObj Object to be used.
407 * \return GL_TRUE for success, GL_FALSE for failure
408 * \sa glBufferDataARB, dd_function_table::BufferData.
411 _mesa_buffer_data( struct gl_context
*ctx
, GLenum target
, GLsizeiptrARB size
,
412 const GLvoid
* data
, GLenum usage
,
413 struct gl_buffer_object
* bufObj
)
417 (void) ctx
; (void) target
;
419 new_data
= _mesa_realloc( bufObj
->Data
, bufObj
->Size
, size
);
421 bufObj
->Data
= (GLubyte
*) new_data
;
423 bufObj
->Usage
= usage
;
426 memcpy( bufObj
->Data
, data
, size
);
438 * Replace data in a subrange of buffer object. If the data range
439 * specified by \c size + \c offset extends beyond the end of the buffer or
440 * if \c data is \c NULL, no copy is performed.
442 * This is the default callback for \c dd_function_table::BufferSubData()
443 * Note that all GL error checking will have been done already.
445 * \param ctx GL context.
446 * \param target Buffer object target on which to operate.
447 * \param offset Offset of the first byte to be modified.
448 * \param size Size, in bytes, of the data range.
449 * \param data Pointer to the data to store in the buffer object.
450 * \param bufObj Object to be used.
452 * \sa glBufferSubDataARB, dd_function_table::BufferSubData.
455 _mesa_buffer_subdata( struct gl_context
*ctx
, GLintptrARB offset
,
456 GLsizeiptrARB size
, const GLvoid
* data
,
457 struct gl_buffer_object
* bufObj
)
461 /* this should have been caught in _mesa_BufferSubData() */
462 ASSERT(size
+ offset
<= bufObj
->Size
);
465 memcpy( (GLubyte
*) bufObj
->Data
+ offset
, data
, size
);
471 * Retrieve data from a subrange of buffer object. If the data range
472 * specified by \c size + \c offset extends beyond the end of the buffer or
473 * if \c data is \c NULL, no copy is performed.
475 * This is the default callback for \c dd_function_table::GetBufferSubData()
476 * Note that all GL error checking will have been done already.
478 * \param ctx GL context.
479 * \param target Buffer object target on which to operate.
480 * \param offset Offset of the first byte to be fetched.
481 * \param size Size, in bytes, of the data range.
482 * \param data Destination for data
483 * \param bufObj Object to be used.
485 * \sa glBufferGetSubDataARB, dd_function_table::GetBufferSubData.
488 _mesa_buffer_get_subdata( struct gl_context
*ctx
, GLintptrARB offset
,
489 GLsizeiptrARB size
, GLvoid
* data
,
490 struct gl_buffer_object
* bufObj
)
494 if (bufObj
->Data
&& ((GLsizeiptrARB
) (size
+ offset
) <= bufObj
->Size
)) {
495 memcpy( data
, (GLubyte
*) bufObj
->Data
+ offset
, size
);
501 * Default fallback for \c dd_function_table::MapBufferRange().
502 * Called via glMapBufferRange().
505 _mesa_buffer_map_range( struct gl_context
*ctx
, GLintptr offset
,
506 GLsizeiptr length
, GLbitfield access
,
507 struct gl_buffer_object
*bufObj
)
510 assert(!_mesa_bufferobj_mapped(bufObj
));
511 /* Just return a direct pointer to the data */
512 bufObj
->Pointer
= bufObj
->Data
+ offset
;
513 bufObj
->Length
= length
;
514 bufObj
->Offset
= offset
;
515 bufObj
->AccessFlags
= access
;
516 return bufObj
->Pointer
;
521 * Default fallback for \c dd_function_table::FlushMappedBufferRange().
522 * Called via glFlushMappedBufferRange().
525 _mesa_buffer_flush_mapped_range( struct gl_context
*ctx
,
526 GLintptr offset
, GLsizeiptr length
,
527 struct gl_buffer_object
*obj
)
538 * Default callback for \c dd_function_table::MapBuffer().
540 * The input parameters will have been already tested for errors.
542 * \sa glUnmapBufferARB, dd_function_table::UnmapBuffer
545 _mesa_buffer_unmap( struct gl_context
*ctx
, struct gl_buffer_object
*bufObj
)
548 /* XXX we might assert here that bufObj->Pointer is non-null */
549 bufObj
->Pointer
= NULL
;
552 bufObj
->AccessFlags
= 0x0;
558 * Default fallback for \c dd_function_table::CopyBufferSubData().
559 * Called via glCopyBufferSubData().
562 _mesa_copy_buffer_subdata(struct gl_context
*ctx
,
563 struct gl_buffer_object
*src
,
564 struct gl_buffer_object
*dst
,
565 GLintptr readOffset
, GLintptr writeOffset
,
568 GLubyte
*srcPtr
, *dstPtr
;
570 /* the buffers should not be mapped */
571 assert(!_mesa_bufferobj_mapped(src
));
572 assert(!_mesa_bufferobj_mapped(dst
));
575 srcPtr
= dstPtr
= ctx
->Driver
.MapBufferRange(ctx
, 0, src
->Size
,
577 GL_MAP_WRITE_BIT
, src
);
582 srcPtr
+= readOffset
;
583 dstPtr
+= writeOffset
;
585 srcPtr
= ctx
->Driver
.MapBufferRange(ctx
, readOffset
, size
,
586 GL_MAP_READ_BIT
, src
);
587 dstPtr
= ctx
->Driver
.MapBufferRange(ctx
, writeOffset
, size
,
589 GL_MAP_INVALIDATE_RANGE_BIT
), dst
);
592 /* Note: the src and dst regions will never overlap. Trying to do so
593 * would generate GL_INVALID_VALUE earlier.
595 if (srcPtr
&& dstPtr
)
596 memcpy(dstPtr
, srcPtr
, size
);
598 ctx
->Driver
.UnmapBuffer(ctx
, src
);
600 ctx
->Driver
.UnmapBuffer(ctx
, dst
);
606 * Initialize the state associated with buffer objects
609 _mesa_init_buffer_objects( struct gl_context
*ctx
)
613 memset(&DummyBufferObject
, 0, sizeof(DummyBufferObject
));
614 _glthread_INIT_MUTEX(DummyBufferObject
.Mutex
);
615 DummyBufferObject
.RefCount
= 1000*1000*1000; /* never delete */
617 _mesa_reference_buffer_object(ctx
, &ctx
->Array
.ArrayBufferObj
,
618 ctx
->Shared
->NullBufferObj
);
620 _mesa_reference_buffer_object(ctx
, &ctx
->CopyReadBuffer
,
621 ctx
->Shared
->NullBufferObj
);
622 _mesa_reference_buffer_object(ctx
, &ctx
->CopyWriteBuffer
,
623 ctx
->Shared
->NullBufferObj
);
625 ctx
->UniformBufferBindings
= calloc(ctx
->Const
.MaxUniformBufferBindings
,
626 sizeof(*ctx
->UniformBufferBindings
));
628 _mesa_reference_buffer_object(ctx
, &ctx
->UniformBuffer
,
629 ctx
->Shared
->NullBufferObj
);
631 for (i
= 0; i
< ctx
->Const
.MaxUniformBufferBindings
; i
++) {
632 _mesa_reference_buffer_object(ctx
,
633 &ctx
->UniformBufferBindings
[i
].BufferObject
,
634 ctx
->Shared
->NullBufferObj
);
635 ctx
->UniformBufferBindings
[i
].Offset
= -1;
636 ctx
->UniformBufferBindings
[i
].Size
= -1;
642 _mesa_free_buffer_objects( struct gl_context
*ctx
)
646 _mesa_reference_buffer_object(ctx
, &ctx
->Array
.ArrayBufferObj
, NULL
);
648 _mesa_reference_buffer_object(ctx
, &ctx
->CopyReadBuffer
, NULL
);
649 _mesa_reference_buffer_object(ctx
, &ctx
->CopyWriteBuffer
, NULL
);
651 _mesa_reference_buffer_object(ctx
, &ctx
->UniformBuffer
, NULL
);
653 for (i
= 0; i
< ctx
->Const
.MaxUniformBufferBindings
; i
++) {
654 _mesa_reference_buffer_object(ctx
,
655 &ctx
->UniformBufferBindings
[i
].BufferObject
,
659 free(ctx
->UniformBufferBindings
);
660 ctx
->UniformBufferBindings
= NULL
;
664 handle_bind_buffer_gen(struct gl_context
*ctx
,
667 struct gl_buffer_object
**buf_handle
)
669 struct gl_buffer_object
*buf
= *buf_handle
;
671 if (!buf
&& ctx
->API
== API_OPENGL_CORE
) {
672 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glBindBuffer(non-gen name)");
676 if (!buf
|| buf
== &DummyBufferObject
) {
677 /* If this is a new buffer object id, or one which was generated but
678 * never used before, allocate a buffer object now.
680 ASSERT(ctx
->Driver
.NewBufferObject
);
681 buf
= ctx
->Driver
.NewBufferObject(ctx
, buffer
, target
);
683 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glBindBufferARB");
686 _mesa_HashInsert(ctx
->Shared
->BufferObjects
, buffer
, buf
);
694 * Bind the specified target to buffer for the specified context.
695 * Called by glBindBuffer() and other functions.
698 bind_buffer_object(struct gl_context
*ctx
, GLenum target
, GLuint buffer
)
700 struct gl_buffer_object
*oldBufObj
;
701 struct gl_buffer_object
*newBufObj
= NULL
;
702 struct gl_buffer_object
**bindTarget
= NULL
;
704 bindTarget
= get_buffer_target(ctx
, target
);
706 _mesa_error(ctx
, GL_INVALID_ENUM
, "glBindBufferARB(target 0x%x)", target
);
710 /* Get pointer to old buffer object (to be unbound) */
711 oldBufObj
= *bindTarget
;
712 if (oldBufObj
&& oldBufObj
->Name
== buffer
&& !oldBufObj
->DeletePending
)
713 return; /* rebinding the same buffer object- no change */
716 * Get pointer to new buffer object (newBufObj)
719 /* The spec says there's not a buffer object named 0, but we use
720 * one internally because it simplifies things.
722 newBufObj
= ctx
->Shared
->NullBufferObj
;
725 /* non-default buffer object */
726 newBufObj
= _mesa_lookup_bufferobj(ctx
, buffer
);
727 if (!handle_bind_buffer_gen(ctx
, target
, buffer
, &newBufObj
))
731 /* bind new buffer */
732 _mesa_reference_buffer_object(ctx
, bindTarget
, newBufObj
);
734 /* Pass BindBuffer call to device driver */
735 if (ctx
->Driver
.BindBuffer
)
736 ctx
->Driver
.BindBuffer( ctx
, target
, newBufObj
);
741 * Update the default buffer objects in the given context to reference those
742 * specified in the shared state and release those referencing the old
746 _mesa_update_default_objects_buffer_objects(struct gl_context
*ctx
)
748 /* Bind the NullBufferObj to remove references to those
749 * in the shared context hash table.
751 bind_buffer_object( ctx
, GL_ARRAY_BUFFER_ARB
, 0);
752 bind_buffer_object( ctx
, GL_ELEMENT_ARRAY_BUFFER_ARB
, 0);
753 bind_buffer_object( ctx
, GL_PIXEL_PACK_BUFFER_ARB
, 0);
754 bind_buffer_object( ctx
, GL_PIXEL_UNPACK_BUFFER_ARB
, 0);
760 * Return the gl_buffer_object for the given ID.
761 * Always return NULL for ID 0.
763 struct gl_buffer_object
*
764 _mesa_lookup_bufferobj(struct gl_context
*ctx
, GLuint buffer
)
769 return (struct gl_buffer_object
*)
770 _mesa_HashLookup(ctx
->Shared
->BufferObjects
, buffer
);
775 * If *ptr points to obj, set ptr = the Null/default buffer object.
776 * This is a helper for buffer object deletion.
777 * The GL spec says that deleting a buffer object causes it to get
778 * unbound from all arrays in the current context.
781 unbind(struct gl_context
*ctx
,
782 struct gl_buffer_object
**ptr
,
783 struct gl_buffer_object
*obj
)
786 _mesa_reference_buffer_object(ctx
, ptr
, ctx
->Shared
->NullBufferObj
);
792 * Plug default/fallback buffer object functions into the device
796 _mesa_init_buffer_object_functions(struct dd_function_table
*driver
)
798 /* GL_ARB_vertex/pixel_buffer_object */
799 driver
->NewBufferObject
= _mesa_new_buffer_object
;
800 driver
->DeleteBuffer
= _mesa_delete_buffer_object
;
801 driver
->BindBuffer
= NULL
;
802 driver
->BufferData
= _mesa_buffer_data
;
803 driver
->BufferSubData
= _mesa_buffer_subdata
;
804 driver
->GetBufferSubData
= _mesa_buffer_get_subdata
;
805 driver
->UnmapBuffer
= _mesa_buffer_unmap
;
807 /* GL_ARB_map_buffer_range */
808 driver
->MapBufferRange
= _mesa_buffer_map_range
;
809 driver
->FlushMappedBufferRange
= _mesa_buffer_flush_mapped_range
;
811 /* GL_ARB_copy_buffer */
812 driver
->CopyBufferSubData
= _mesa_copy_buffer_subdata
;
817 /**********************************************************************/
819 /**********************************************************************/
822 _mesa_BindBuffer(GLenum target
, GLuint buffer
)
824 GET_CURRENT_CONTEXT(ctx
);
825 ASSERT_OUTSIDE_BEGIN_END(ctx
);
827 if (MESA_VERBOSE
& VERBOSE_API
)
828 _mesa_debug(ctx
, "glBindBuffer(%s, %u)\n",
829 _mesa_lookup_enum_by_nr(target
), buffer
);
831 bind_buffer_object(ctx
, target
, buffer
);
836 * Delete a set of buffer objects.
838 * \param n Number of buffer objects to delete.
839 * \param ids Array of \c n buffer object IDs.
842 _mesa_DeleteBuffers(GLsizei n
, const GLuint
*ids
)
844 GET_CURRENT_CONTEXT(ctx
);
846 ASSERT_OUTSIDE_BEGIN_END(ctx
);
847 FLUSH_VERTICES(ctx
, 0);
850 _mesa_error(ctx
, GL_INVALID_VALUE
, "glDeleteBuffersARB(n)");
854 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
856 for (i
= 0; i
< n
; i
++) {
857 struct gl_buffer_object
*bufObj
= _mesa_lookup_bufferobj(ctx
, ids
[i
]);
859 struct gl_array_object
*arrayObj
= ctx
->Array
.ArrayObj
;
862 ASSERT(bufObj
->Name
== ids
[i
] || bufObj
== &DummyBufferObject
);
864 if (_mesa_bufferobj_mapped(bufObj
)) {
865 /* if mapped, unmap it now */
866 ctx
->Driver
.UnmapBuffer(ctx
, bufObj
);
867 bufObj
->AccessFlags
= default_access_mode(ctx
);
868 bufObj
->Pointer
= NULL
;
871 /* unbind any vertex pointers bound to this buffer */
872 for (j
= 0; j
< Elements(arrayObj
->VertexAttrib
); j
++) {
873 unbind(ctx
, &arrayObj
->VertexAttrib
[j
].BufferObj
, bufObj
);
876 if (ctx
->Array
.ArrayBufferObj
== bufObj
) {
877 _mesa_BindBuffer( GL_ARRAY_BUFFER_ARB
, 0 );
879 if (arrayObj
->ElementArrayBufferObj
== bufObj
) {
880 _mesa_BindBuffer( GL_ELEMENT_ARRAY_BUFFER_ARB
, 0 );
883 /* unbind ARB_copy_buffer binding points */
884 if (ctx
->CopyReadBuffer
== bufObj
) {
885 _mesa_BindBuffer( GL_COPY_READ_BUFFER
, 0 );
887 if (ctx
->CopyWriteBuffer
== bufObj
) {
888 _mesa_BindBuffer( GL_COPY_WRITE_BUFFER
, 0 );
891 /* unbind transform feedback binding points */
892 if (ctx
->TransformFeedback
.CurrentBuffer
== bufObj
) {
893 _mesa_BindBuffer( GL_TRANSFORM_FEEDBACK_BUFFER
, 0 );
895 for (j
= 0; j
< MAX_FEEDBACK_BUFFERS
; j
++) {
896 if (ctx
->TransformFeedback
.CurrentObject
->Buffers
[j
] == bufObj
) {
897 _mesa_BindBufferBase( GL_TRANSFORM_FEEDBACK_BUFFER
, j
, 0 );
901 /* unbind UBO binding points */
902 for (j
= 0; j
< ctx
->Const
.MaxUniformBufferBindings
; j
++) {
903 if (ctx
->UniformBufferBindings
[j
].BufferObject
== bufObj
) {
904 _mesa_BindBufferBase( GL_UNIFORM_BUFFER
, j
, 0 );
908 if (ctx
->UniformBuffer
== bufObj
) {
909 _mesa_BindBuffer( GL_UNIFORM_BUFFER
, 0 );
912 /* unbind any pixel pack/unpack pointers bound to this buffer */
913 if (ctx
->Pack
.BufferObj
== bufObj
) {
914 _mesa_BindBuffer( GL_PIXEL_PACK_BUFFER_EXT
, 0 );
916 if (ctx
->Unpack
.BufferObj
== bufObj
) {
917 _mesa_BindBuffer( GL_PIXEL_UNPACK_BUFFER_EXT
, 0 );
920 if (ctx
->Texture
.BufferObject
== bufObj
) {
921 _mesa_BindBuffer( GL_TEXTURE_BUFFER
, 0 );
924 /* The ID is immediately freed for re-use */
925 _mesa_HashRemove(ctx
->Shared
->BufferObjects
, ids
[i
]);
926 /* Make sure we do not run into the classic ABA problem on bind.
927 * We don't want to allow re-binding a buffer object that's been
928 * "deleted" by glDeleteBuffers().
930 * The explicit rebinding to the default object in the current context
931 * prevents the above in the current context, but another context
932 * sharing the same objects might suffer from this problem.
933 * The alternative would be to do the hash lookup in any case on bind
934 * which would introduce more runtime overhead than this.
936 bufObj
->DeletePending
= GL_TRUE
;
937 _mesa_reference_buffer_object(ctx
, &bufObj
, NULL
);
941 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
946 * Generate a set of unique buffer object IDs and store them in \c buffer.
948 * \param n Number of IDs to generate.
949 * \param buffer Array of \c n locations to store the IDs.
952 _mesa_GenBuffers(GLsizei n
, GLuint
*buffer
)
954 GET_CURRENT_CONTEXT(ctx
);
957 ASSERT_OUTSIDE_BEGIN_END(ctx
);
959 if (MESA_VERBOSE
& VERBOSE_API
)
960 _mesa_debug(ctx
, "glGenBuffers(%d)\n", n
);
963 _mesa_error(ctx
, GL_INVALID_VALUE
, "glGenBuffersARB");
972 * This must be atomic (generation and allocation of buffer object IDs)
974 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
976 first
= _mesa_HashFindFreeKeyBlock(ctx
->Shared
->BufferObjects
, n
);
978 /* Insert the ID and pointer to dummy buffer object into hash table */
979 for (i
= 0; i
< n
; i
++) {
980 _mesa_HashInsert(ctx
->Shared
->BufferObjects
, first
+ i
,
982 buffer
[i
] = first
+ i
;
985 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
990 * Determine if ID is the name of a buffer object.
992 * \param id ID of the potential buffer object.
993 * \return \c GL_TRUE if \c id is the name of a buffer object,
994 * \c GL_FALSE otherwise.
997 _mesa_IsBuffer(GLuint id
)
999 struct gl_buffer_object
*bufObj
;
1000 GET_CURRENT_CONTEXT(ctx
);
1001 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, GL_FALSE
);
1003 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
1004 bufObj
= _mesa_lookup_bufferobj(ctx
, id
);
1005 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
1007 return bufObj
&& bufObj
!= &DummyBufferObject
;
1012 _mesa_BufferData(GLenum target
, GLsizeiptrARB size
,
1013 const GLvoid
* data
, GLenum usage
)
1015 GET_CURRENT_CONTEXT(ctx
);
1016 struct gl_buffer_object
*bufObj
;
1018 ASSERT_OUTSIDE_BEGIN_END(ctx
);
1020 if (MESA_VERBOSE
& VERBOSE_API
)
1021 _mesa_debug(ctx
, "glBufferData(%s, %ld, %p, %s)\n",
1022 _mesa_lookup_enum_by_nr(target
),
1023 (long int) size
, data
,
1024 _mesa_lookup_enum_by_nr(usage
));
1027 _mesa_error(ctx
, GL_INVALID_VALUE
, "glBufferDataARB(size < 0)");
1032 case GL_STREAM_DRAW_ARB
:
1033 valid_usage
= (ctx
->API
!= API_OPENGLES
);
1036 case GL_STATIC_DRAW_ARB
:
1037 case GL_DYNAMIC_DRAW_ARB
:
1041 case GL_STREAM_READ_ARB
:
1042 case GL_STREAM_COPY_ARB
:
1043 case GL_STATIC_READ_ARB
:
1044 case GL_STATIC_COPY_ARB
:
1045 case GL_DYNAMIC_READ_ARB
:
1046 case GL_DYNAMIC_COPY_ARB
:
1047 valid_usage
= _mesa_is_desktop_gl(ctx
) || _mesa_is_gles3(ctx
);
1051 valid_usage
= false;
1056 _mesa_error(ctx
, GL_INVALID_ENUM
, "glBufferData(usage)");
1060 bufObj
= get_buffer(ctx
, "glBufferDataARB", target
);
1064 if (_mesa_bufferobj_mapped(bufObj
)) {
1065 /* Unmap the existing buffer. We'll replace it now. Not an error. */
1066 ctx
->Driver
.UnmapBuffer(ctx
, bufObj
);
1067 bufObj
->AccessFlags
= default_access_mode(ctx
);
1068 ASSERT(bufObj
->Pointer
== NULL
);
1071 FLUSH_VERTICES(ctx
, _NEW_BUFFER_OBJECT
);
1073 bufObj
->Written
= GL_TRUE
;
1076 printf("glBufferDataARB(%u, sz %ld, from %p, usage 0x%x)\n",
1077 bufObj
->Name
, size
, data
, usage
);
1084 ASSERT(ctx
->Driver
.BufferData
);
1085 if (!ctx
->Driver
.BufferData( ctx
, target
, size
, data
, usage
, bufObj
)) {
1086 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glBufferDataARB()");
1092 _mesa_BufferSubData(GLenum target
, GLintptrARB offset
,
1093 GLsizeiptrARB size
, const GLvoid
* data
)
1095 GET_CURRENT_CONTEXT(ctx
);
1096 struct gl_buffer_object
*bufObj
;
1097 ASSERT_OUTSIDE_BEGIN_END(ctx
);
1099 bufObj
= buffer_object_subdata_range_good( ctx
, target
, offset
, size
,
1100 "glBufferSubDataARB" );
1102 /* error already recorded */
1109 bufObj
->Written
= GL_TRUE
;
1111 ASSERT(ctx
->Driver
.BufferSubData
);
1112 ctx
->Driver
.BufferSubData( ctx
, offset
, size
, data
, bufObj
);
1117 _mesa_GetBufferSubData(GLenum target
, GLintptrARB offset
,
1118 GLsizeiptrARB size
, void * data
)
1120 GET_CURRENT_CONTEXT(ctx
);
1121 struct gl_buffer_object
*bufObj
;
1122 ASSERT_OUTSIDE_BEGIN_END(ctx
);
1124 bufObj
= buffer_object_subdata_range_good( ctx
, target
, offset
, size
,
1125 "glGetBufferSubDataARB" );
1127 /* error already recorded */
1131 ASSERT(ctx
->Driver
.GetBufferSubData
);
1132 ctx
->Driver
.GetBufferSubData( ctx
, offset
, size
, data
, bufObj
);
1137 _mesa_MapBuffer(GLenum target
, GLenum access
)
1139 GET_CURRENT_CONTEXT(ctx
);
1140 struct gl_buffer_object
* bufObj
;
1141 GLbitfield accessFlags
;
1145 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, NULL
);
1148 case GL_READ_ONLY_ARB
:
1149 accessFlags
= GL_MAP_READ_BIT
;
1150 valid_access
= _mesa_is_desktop_gl(ctx
);
1152 case GL_WRITE_ONLY_ARB
:
1153 accessFlags
= GL_MAP_WRITE_BIT
;
1154 valid_access
= true;
1156 case GL_READ_WRITE_ARB
:
1157 accessFlags
= GL_MAP_READ_BIT
| GL_MAP_WRITE_BIT
;
1158 valid_access
= _mesa_is_desktop_gl(ctx
);
1161 valid_access
= false;
1165 if (!valid_access
) {
1166 _mesa_error(ctx
, GL_INVALID_ENUM
, "glMapBufferARB(access)");
1170 bufObj
= get_buffer(ctx
, "glMapBufferARB", target
);
1174 if (_mesa_bufferobj_mapped(bufObj
)) {
1175 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glMapBufferARB(already mapped)");
1179 if (!bufObj
->Size
) {
1180 _mesa_error(ctx
, GL_OUT_OF_MEMORY
,
1181 "glMapBuffer(buffer size = 0)");
1185 ASSERT(ctx
->Driver
.MapBufferRange
);
1186 map
= ctx
->Driver
.MapBufferRange(ctx
, 0, bufObj
->Size
, accessFlags
, bufObj
);
1188 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glMapBufferARB(map failed)");
1192 /* The driver callback should have set these fields.
1193 * This is important because other modules (like VBO) might call
1194 * the driver function directly.
1196 ASSERT(bufObj
->Pointer
== map
);
1197 ASSERT(bufObj
->Length
== bufObj
->Size
);
1198 ASSERT(bufObj
->Offset
== 0);
1199 bufObj
->AccessFlags
= accessFlags
;
1202 if (access
== GL_WRITE_ONLY_ARB
|| access
== GL_READ_WRITE_ARB
)
1203 bufObj
->Written
= GL_TRUE
;
1206 printf("glMapBufferARB(%u, sz %ld, access 0x%x)\n",
1207 bufObj
->Name
, bufObj
->Size
, access
);
1208 if (access
== GL_WRITE_ONLY_ARB
) {
1210 GLubyte
*b
= (GLubyte
*) bufObj
->Pointer
;
1211 for (i
= 0; i
< bufObj
->Size
; i
++)
1218 GLubyte
*buf
= (GLubyte
*) bufObj
->Pointer
;
1220 /* buffer is 100 bytes larger than requested, fill with magic value */
1221 for (i
= 0; i
< 100; i
++) {
1222 buf
[bufObj
->Size
- i
- 1] = 123;
1227 return bufObj
->Pointer
;
1231 GLboolean GLAPIENTRY
1232 _mesa_UnmapBuffer(GLenum target
)
1234 GET_CURRENT_CONTEXT(ctx
);
1235 struct gl_buffer_object
*bufObj
;
1236 GLboolean status
= GL_TRUE
;
1237 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, GL_FALSE
);
1239 bufObj
= get_buffer(ctx
, "glUnmapBufferARB", target
);
1243 if (!_mesa_bufferobj_mapped(bufObj
)) {
1244 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glUnmapBufferARB");
1249 if (bufObj
->Access
!= GL_READ_ONLY_ARB
) {
1250 GLubyte
*buf
= (GLubyte
*) bufObj
->Pointer
;
1252 /* check that last 100 bytes are still = magic value */
1253 for (i
= 0; i
< 100; i
++) {
1254 GLuint pos
= bufObj
->Size
- i
- 1;
1255 if (buf
[pos
] != 123) {
1256 _mesa_warning(ctx
, "Out of bounds buffer object write detected"
1257 " at position %d (value = %u)\n",
1265 if (bufObj
->AccessFlags
& GL_MAP_WRITE_BIT
) {
1266 GLuint i
, unchanged
= 0;
1267 GLubyte
*b
= (GLubyte
*) bufObj
->Pointer
;
1269 /* check which bytes changed */
1270 for (i
= 0; i
< bufObj
->Size
- 1; i
++) {
1271 if (b
[i
] == (i
& 0xff) && b
[i
+1] == ((i
+1) & 0xff)) {
1278 printf("glUnmapBufferARB(%u): %u of %ld unchanged, starting at %d\n",
1279 bufObj
->Name
, unchanged
, bufObj
->Size
, pos
);
1284 status
= ctx
->Driver
.UnmapBuffer( ctx
, bufObj
);
1285 bufObj
->AccessFlags
= default_access_mode(ctx
);
1286 ASSERT(bufObj
->Pointer
== NULL
);
1287 ASSERT(bufObj
->Offset
== 0);
1288 ASSERT(bufObj
->Length
== 0);
1295 _mesa_GetBufferParameteriv(GLenum target
, GLenum pname
, GLint
*params
)
1297 GET_CURRENT_CONTEXT(ctx
);
1298 struct gl_buffer_object
*bufObj
;
1299 ASSERT_OUTSIDE_BEGIN_END(ctx
);
1301 bufObj
= get_buffer(ctx
, "glGetBufferParameterivARB", target
);
1306 case GL_BUFFER_SIZE_ARB
:
1307 *params
= (GLint
) bufObj
->Size
;
1309 case GL_BUFFER_USAGE_ARB
:
1310 *params
= bufObj
->Usage
;
1312 case GL_BUFFER_ACCESS_ARB
:
1313 *params
= simplified_access_mode(bufObj
->AccessFlags
);
1315 case GL_BUFFER_MAPPED_ARB
:
1316 *params
= _mesa_bufferobj_mapped(bufObj
);
1318 case GL_BUFFER_ACCESS_FLAGS
:
1319 if (!ctx
->Extensions
.ARB_map_buffer_range
)
1321 *params
= bufObj
->AccessFlags
;
1323 case GL_BUFFER_MAP_OFFSET
:
1324 if (!ctx
->Extensions
.ARB_map_buffer_range
)
1326 *params
= (GLint
) bufObj
->Offset
;
1328 case GL_BUFFER_MAP_LENGTH
:
1329 if (!ctx
->Extensions
.ARB_map_buffer_range
)
1331 *params
= (GLint
) bufObj
->Length
;
1334 ; /* fall-through */
1338 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetBufferParameterivARB(pname=%s)",
1339 _mesa_lookup_enum_by_nr(pname
));
1345 * This is pretty much a duplicate of GetBufferParameteriv() but the
1346 * GL_BUFFER_SIZE_ARB attribute will be 64-bits on a 64-bit system.
1349 _mesa_GetBufferParameteri64v(GLenum target
, GLenum pname
, GLint64
*params
)
1351 GET_CURRENT_CONTEXT(ctx
);
1352 struct gl_buffer_object
*bufObj
;
1353 ASSERT_OUTSIDE_BEGIN_END(ctx
);
1355 bufObj
= get_buffer(ctx
, "glGetBufferParameteri64v", target
);
1360 case GL_BUFFER_SIZE_ARB
:
1361 *params
= bufObj
->Size
;
1363 case GL_BUFFER_USAGE_ARB
:
1364 *params
= bufObj
->Usage
;
1366 case GL_BUFFER_ACCESS_ARB
:
1367 *params
= simplified_access_mode(bufObj
->AccessFlags
);
1369 case GL_BUFFER_ACCESS_FLAGS
:
1370 if (!ctx
->Extensions
.ARB_map_buffer_range
)
1372 *params
= bufObj
->AccessFlags
;
1374 case GL_BUFFER_MAPPED_ARB
:
1375 *params
= _mesa_bufferobj_mapped(bufObj
);
1377 case GL_BUFFER_MAP_OFFSET
:
1378 if (!ctx
->Extensions
.ARB_map_buffer_range
)
1380 *params
= bufObj
->Offset
;
1382 case GL_BUFFER_MAP_LENGTH
:
1383 if (!ctx
->Extensions
.ARB_map_buffer_range
)
1385 *params
= bufObj
->Length
;
1388 ; /* fall-through */
1392 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetBufferParameteri64v(pname=%s)",
1393 _mesa_lookup_enum_by_nr(pname
));
1398 _mesa_GetBufferPointerv(GLenum target
, GLenum pname
, GLvoid
**params
)
1400 GET_CURRENT_CONTEXT(ctx
);
1401 struct gl_buffer_object
* bufObj
;
1402 ASSERT_OUTSIDE_BEGIN_END(ctx
);
1404 if (pname
!= GL_BUFFER_MAP_POINTER_ARB
) {
1405 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetBufferPointervARB(pname)");
1409 bufObj
= get_buffer(ctx
, "glGetBufferPointervARB", target
);
1413 *params
= bufObj
->Pointer
;
1418 _mesa_CopyBufferSubData(GLenum readTarget
, GLenum writeTarget
,
1419 GLintptr readOffset
, GLintptr writeOffset
,
1422 GET_CURRENT_CONTEXT(ctx
);
1423 struct gl_buffer_object
*src
, *dst
;
1424 ASSERT_OUTSIDE_BEGIN_END(ctx
);
1426 src
= get_buffer(ctx
, "glCopyBufferSubData", readTarget
);
1430 dst
= get_buffer(ctx
, "glCopyBufferSubData", writeTarget
);
1434 if (_mesa_bufferobj_mapped(src
)) {
1435 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1436 "glCopyBufferSubData(readBuffer is mapped)");
1440 if (_mesa_bufferobj_mapped(dst
)) {
1441 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1442 "glCopyBufferSubData(writeBuffer is mapped)");
1446 if (readOffset
< 0) {
1447 _mesa_error(ctx
, GL_INVALID_VALUE
,
1448 "glCopyBufferSubData(readOffset = %d)", (int) readOffset
);
1452 if (writeOffset
< 0) {
1453 _mesa_error(ctx
, GL_INVALID_VALUE
,
1454 "glCopyBufferSubData(writeOffset = %d)", (int) writeOffset
);
1459 _mesa_error(ctx
, GL_INVALID_VALUE
,
1460 "glCopyBufferSubData(writeOffset = %d)", (int) size
);
1464 if (readOffset
+ size
> src
->Size
) {
1465 _mesa_error(ctx
, GL_INVALID_VALUE
,
1466 "glCopyBufferSubData(readOffset + size = %d)",
1467 (int) (readOffset
+ size
));
1471 if (writeOffset
+ size
> dst
->Size
) {
1472 _mesa_error(ctx
, GL_INVALID_VALUE
,
1473 "glCopyBufferSubData(writeOffset + size = %d)",
1474 (int) (writeOffset
+ size
));
1479 if (readOffset
+ size
<= writeOffset
) {
1482 else if (writeOffset
+ size
<= readOffset
) {
1486 /* overlapping src/dst is illegal */
1487 _mesa_error(ctx
, GL_INVALID_VALUE
,
1488 "glCopyBufferSubData(overlapping src/dst)");
1493 ctx
->Driver
.CopyBufferSubData(ctx
, src
, dst
, readOffset
, writeOffset
, size
);
1498 * See GL_ARB_map_buffer_range spec
1501 _mesa_MapBufferRange(GLenum target
, GLintptr offset
, GLsizeiptr length
,
1504 GET_CURRENT_CONTEXT(ctx
);
1505 struct gl_buffer_object
*bufObj
;
1508 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, NULL
);
1510 if (!ctx
->Extensions
.ARB_map_buffer_range
) {
1511 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1512 "glMapBufferRange(extension not supported)");
1517 _mesa_error(ctx
, GL_INVALID_VALUE
,
1518 "glMapBufferRange(offset = %ld)", (long)offset
);
1523 _mesa_error(ctx
, GL_INVALID_VALUE
,
1524 "glMapBufferRange(length = %ld)", (long)length
);
1528 /* Page 38 of the PDF of the OpenGL ES 3.0 spec says:
1530 * "An INVALID_OPERATION error is generated for any of the following
1533 * * <length> is zero."
1535 if (_mesa_is_gles(ctx
) && length
== 0) {
1536 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1537 "glMapBufferRange(length = 0)");
1541 if (access
& ~(GL_MAP_READ_BIT
|
1543 GL_MAP_INVALIDATE_RANGE_BIT
|
1544 GL_MAP_INVALIDATE_BUFFER_BIT
|
1545 GL_MAP_FLUSH_EXPLICIT_BIT
|
1546 GL_MAP_UNSYNCHRONIZED_BIT
)) {
1547 /* generate an error if any undefind bit is set */
1548 _mesa_error(ctx
, GL_INVALID_VALUE
, "glMapBufferRange(access)");
1552 if ((access
& (GL_MAP_READ_BIT
| GL_MAP_WRITE_BIT
)) == 0) {
1553 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1554 "glMapBufferRange(access indicates neither read or write)");
1558 if ((access
& GL_MAP_READ_BIT
) &&
1559 (access
& (GL_MAP_INVALIDATE_RANGE_BIT
|
1560 GL_MAP_INVALIDATE_BUFFER_BIT
|
1561 GL_MAP_UNSYNCHRONIZED_BIT
))) {
1562 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1563 "glMapBufferRange(invalid access flags)");
1567 if ((access
& GL_MAP_FLUSH_EXPLICIT_BIT
) &&
1568 ((access
& GL_MAP_WRITE_BIT
) == 0)) {
1569 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1570 "glMapBufferRange(invalid access flags)");
1574 bufObj
= get_buffer(ctx
, "glMapBufferRange", target
);
1578 if (offset
+ length
> bufObj
->Size
) {
1579 _mesa_error(ctx
, GL_INVALID_VALUE
,
1580 "glMapBufferRange(offset + length > size)");
1584 if (_mesa_bufferobj_mapped(bufObj
)) {
1585 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1586 "glMapBufferRange(buffer already mapped)");
1590 if (!bufObj
->Size
) {
1591 _mesa_error(ctx
, GL_OUT_OF_MEMORY
,
1592 "glMapBufferRange(buffer size = 0)");
1596 /* Mapping zero bytes should return a non-null pointer. */
1598 static long dummy
= 0;
1599 bufObj
->Pointer
= &dummy
;
1600 bufObj
->Length
= length
;
1601 bufObj
->Offset
= offset
;
1602 bufObj
->AccessFlags
= access
;
1603 return bufObj
->Pointer
;
1606 ASSERT(ctx
->Driver
.MapBufferRange
);
1607 map
= ctx
->Driver
.MapBufferRange(ctx
, offset
, length
, access
, bufObj
);
1609 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glMapBufferARB(map failed)");
1612 /* The driver callback should have set all these fields.
1613 * This is important because other modules (like VBO) might call
1614 * the driver function directly.
1616 ASSERT(bufObj
->Pointer
== map
);
1617 ASSERT(bufObj
->Length
== length
);
1618 ASSERT(bufObj
->Offset
== offset
);
1619 ASSERT(bufObj
->AccessFlags
== access
);
1627 * See GL_ARB_map_buffer_range spec
1630 _mesa_FlushMappedBufferRange(GLenum target
, GLintptr offset
, GLsizeiptr length
)
1632 GET_CURRENT_CONTEXT(ctx
);
1633 struct gl_buffer_object
*bufObj
;
1634 ASSERT_OUTSIDE_BEGIN_END(ctx
);
1636 if (!ctx
->Extensions
.ARB_map_buffer_range
) {
1637 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1638 "glFlushMappedBufferRange(extension not supported)");
1643 _mesa_error(ctx
, GL_INVALID_VALUE
,
1644 "glFlushMappedBufferRange(offset = %ld)", (long)offset
);
1649 _mesa_error(ctx
, GL_INVALID_VALUE
,
1650 "glFlushMappedBufferRange(length = %ld)", (long)length
);
1654 bufObj
= get_buffer(ctx
, "glFlushMappedBufferRange", target
);
1658 if (!_mesa_bufferobj_mapped(bufObj
)) {
1659 /* buffer is not mapped */
1660 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1661 "glFlushMappedBufferRange(buffer is not mapped)");
1665 if ((bufObj
->AccessFlags
& GL_MAP_FLUSH_EXPLICIT_BIT
) == 0) {
1666 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1667 "glFlushMappedBufferRange(GL_MAP_FLUSH_EXPLICIT_BIT not set)");
1671 if (offset
+ length
> bufObj
->Length
) {
1672 _mesa_error(ctx
, GL_INVALID_VALUE
,
1673 "glFlushMappedBufferRange(offset %ld + length %ld > mapped length %ld)",
1674 (long)offset
, (long)length
, (long)bufObj
->Length
);
1678 ASSERT(bufObj
->AccessFlags
& GL_MAP_WRITE_BIT
);
1680 if (ctx
->Driver
.FlushMappedBufferRange
)
1681 ctx
->Driver
.FlushMappedBufferRange(ctx
, offset
, length
, bufObj
);
1686 buffer_object_purgeable(struct gl_context
*ctx
, GLuint name
, GLenum option
)
1688 struct gl_buffer_object
*bufObj
;
1691 bufObj
= _mesa_lookup_bufferobj(ctx
, name
);
1693 _mesa_error(ctx
, GL_INVALID_VALUE
,
1694 "glObjectPurgeable(name = 0x%x)", name
);
1697 if (!_mesa_is_bufferobj(bufObj
)) {
1698 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glObjectPurgeable(buffer 0)" );
1702 if (bufObj
->Purgeable
) {
1703 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1704 "glObjectPurgeable(name = 0x%x) is already purgeable", name
);
1705 return GL_VOLATILE_APPLE
;
1708 bufObj
->Purgeable
= GL_TRUE
;
1710 retval
= GL_VOLATILE_APPLE
;
1711 if (ctx
->Driver
.BufferObjectPurgeable
)
1712 retval
= ctx
->Driver
.BufferObjectPurgeable(ctx
, bufObj
, option
);
1719 renderbuffer_purgeable(struct gl_context
*ctx
, GLuint name
, GLenum option
)
1721 struct gl_renderbuffer
*bufObj
;
1724 bufObj
= _mesa_lookup_renderbuffer(ctx
, name
);
1726 _mesa_error(ctx
, GL_INVALID_VALUE
,
1727 "glObjectUnpurgeable(name = 0x%x)", name
);
1731 if (bufObj
->Purgeable
) {
1732 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1733 "glObjectPurgeable(name = 0x%x) is already purgeable", name
);
1734 return GL_VOLATILE_APPLE
;
1737 bufObj
->Purgeable
= GL_TRUE
;
1739 retval
= GL_VOLATILE_APPLE
;
1740 if (ctx
->Driver
.RenderObjectPurgeable
)
1741 retval
= ctx
->Driver
.RenderObjectPurgeable(ctx
, bufObj
, option
);
1748 texture_object_purgeable(struct gl_context
*ctx
, GLuint name
, GLenum option
)
1750 struct gl_texture_object
*bufObj
;
1753 bufObj
= _mesa_lookup_texture(ctx
, name
);
1755 _mesa_error(ctx
, GL_INVALID_VALUE
,
1756 "glObjectPurgeable(name = 0x%x)", name
);
1760 if (bufObj
->Purgeable
) {
1761 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1762 "glObjectPurgeable(name = 0x%x) is already purgeable", name
);
1763 return GL_VOLATILE_APPLE
;
1766 bufObj
->Purgeable
= GL_TRUE
;
1768 retval
= GL_VOLATILE_APPLE
;
1769 if (ctx
->Driver
.TextureObjectPurgeable
)
1770 retval
= ctx
->Driver
.TextureObjectPurgeable(ctx
, bufObj
, option
);
1777 _mesa_ObjectPurgeableAPPLE(GLenum objectType
, GLuint name
, GLenum option
)
1781 GET_CURRENT_CONTEXT(ctx
);
1782 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, 0);
1785 _mesa_error(ctx
, GL_INVALID_VALUE
,
1786 "glObjectPurgeable(name = 0x%x)", name
);
1791 case GL_VOLATILE_APPLE
:
1792 case GL_RELEASED_APPLE
:
1796 _mesa_error(ctx
, GL_INVALID_ENUM
,
1797 "glObjectPurgeable(name = 0x%x) invalid option: %d",
1802 switch (objectType
) {
1804 retval
= texture_object_purgeable(ctx
, name
, option
);
1806 case GL_RENDERBUFFER_EXT
:
1807 retval
= renderbuffer_purgeable(ctx
, name
, option
);
1809 case GL_BUFFER_OBJECT_APPLE
:
1810 retval
= buffer_object_purgeable(ctx
, name
, option
);
1813 _mesa_error(ctx
, GL_INVALID_ENUM
,
1814 "glObjectPurgeable(name = 0x%x) invalid type: %d",
1819 /* In strict conformance to the spec, we must only return VOLATILE when
1820 * when passed the VOLATILE option. Madness.
1822 * XXX First fix the spec, then fix me.
1824 return option
== GL_VOLATILE_APPLE
? GL_VOLATILE_APPLE
: retval
;
1829 buffer_object_unpurgeable(struct gl_context
*ctx
, GLuint name
, GLenum option
)
1831 struct gl_buffer_object
*bufObj
;
1834 bufObj
= _mesa_lookup_bufferobj(ctx
, name
);
1836 _mesa_error(ctx
, GL_INVALID_VALUE
,
1837 "glObjectUnpurgeable(name = 0x%x)", name
);
1841 if (! bufObj
->Purgeable
) {
1842 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1843 "glObjectUnpurgeable(name = 0x%x) object is "
1844 " already \"unpurged\"", name
);
1848 bufObj
->Purgeable
= GL_FALSE
;
1851 if (ctx
->Driver
.BufferObjectUnpurgeable
)
1852 retval
= ctx
->Driver
.BufferObjectUnpurgeable(ctx
, bufObj
, option
);
1859 renderbuffer_unpurgeable(struct gl_context
*ctx
, GLuint name
, GLenum option
)
1861 struct gl_renderbuffer
*bufObj
;
1864 bufObj
= _mesa_lookup_renderbuffer(ctx
, name
);
1866 _mesa_error(ctx
, GL_INVALID_VALUE
,
1867 "glObjectUnpurgeable(name = 0x%x)", name
);
1871 if (! bufObj
->Purgeable
) {
1872 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1873 "glObjectUnpurgeable(name = 0x%x) object is "
1874 " already \"unpurged\"", name
);
1878 bufObj
->Purgeable
= GL_FALSE
;
1881 if (ctx
->Driver
.RenderObjectUnpurgeable
)
1882 retval
= ctx
->Driver
.RenderObjectUnpurgeable(ctx
, bufObj
, option
);
1889 texture_object_unpurgeable(struct gl_context
*ctx
, GLuint name
, GLenum option
)
1891 struct gl_texture_object
*bufObj
;
1894 bufObj
= _mesa_lookup_texture(ctx
, name
);
1896 _mesa_error(ctx
, GL_INVALID_VALUE
,
1897 "glObjectUnpurgeable(name = 0x%x)", name
);
1901 if (! bufObj
->Purgeable
) {
1902 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1903 "glObjectUnpurgeable(name = 0x%x) object is"
1904 " already \"unpurged\"", name
);
1908 bufObj
->Purgeable
= GL_FALSE
;
1911 if (ctx
->Driver
.TextureObjectUnpurgeable
)
1912 retval
= ctx
->Driver
.TextureObjectUnpurgeable(ctx
, bufObj
, option
);
1919 _mesa_ObjectUnpurgeableAPPLE(GLenum objectType
, GLuint name
, GLenum option
)
1921 GET_CURRENT_CONTEXT(ctx
);
1922 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, 0);
1925 _mesa_error(ctx
, GL_INVALID_VALUE
,
1926 "glObjectUnpurgeable(name = 0x%x)", name
);
1931 case GL_RETAINED_APPLE
:
1932 case GL_UNDEFINED_APPLE
:
1936 _mesa_error(ctx
, GL_INVALID_ENUM
,
1937 "glObjectUnpurgeable(name = 0x%x) invalid option: %d",
1942 switch (objectType
) {
1943 case GL_BUFFER_OBJECT_APPLE
:
1944 return buffer_object_unpurgeable(ctx
, name
, option
);
1946 return texture_object_unpurgeable(ctx
, name
, option
);
1947 case GL_RENDERBUFFER_EXT
:
1948 return renderbuffer_unpurgeable(ctx
, name
, option
);
1950 _mesa_error(ctx
, GL_INVALID_ENUM
,
1951 "glObjectUnpurgeable(name = 0x%x) invalid type: %d",
1959 get_buffer_object_parameteriv(struct gl_context
*ctx
, GLuint name
,
1960 GLenum pname
, GLint
*params
)
1962 struct gl_buffer_object
*bufObj
= _mesa_lookup_bufferobj(ctx
, name
);
1964 _mesa_error(ctx
, GL_INVALID_VALUE
,
1965 "glGetObjectParameteriv(name = 0x%x) invalid object", name
);
1970 case GL_PURGEABLE_APPLE
:
1971 *params
= bufObj
->Purgeable
;
1974 _mesa_error(ctx
, GL_INVALID_ENUM
,
1975 "glGetObjectParameteriv(name = 0x%x) invalid enum: %d",
1983 get_renderbuffer_parameteriv(struct gl_context
*ctx
, GLuint name
,
1984 GLenum pname
, GLint
*params
)
1986 struct gl_renderbuffer
*rb
= _mesa_lookup_renderbuffer(ctx
, name
);
1988 _mesa_error(ctx
, GL_INVALID_VALUE
,
1989 "glObjectUnpurgeable(name = 0x%x)", name
);
1994 case GL_PURGEABLE_APPLE
:
1995 *params
= rb
->Purgeable
;
1998 _mesa_error(ctx
, GL_INVALID_ENUM
,
1999 "glGetObjectParameteriv(name = 0x%x) invalid enum: %d",
2007 get_texture_object_parameteriv(struct gl_context
*ctx
, GLuint name
,
2008 GLenum pname
, GLint
*params
)
2010 struct gl_texture_object
*texObj
= _mesa_lookup_texture(ctx
, name
);
2012 _mesa_error(ctx
, GL_INVALID_VALUE
,
2013 "glObjectUnpurgeable(name = 0x%x)", name
);
2018 case GL_PURGEABLE_APPLE
:
2019 *params
= texObj
->Purgeable
;
2022 _mesa_error(ctx
, GL_INVALID_ENUM
,
2023 "glGetObjectParameteriv(name = 0x%x) invalid enum: %d",
2031 _mesa_GetObjectParameterivAPPLE(GLenum objectType
, GLuint name
, GLenum pname
,
2034 GET_CURRENT_CONTEXT(ctx
);
2037 _mesa_error(ctx
, GL_INVALID_VALUE
,
2038 "glGetObjectParameteriv(name = 0x%x)", name
);
2042 switch (objectType
) {
2044 get_texture_object_parameteriv(ctx
, name
, pname
, params
);
2046 case GL_BUFFER_OBJECT_APPLE
:
2047 get_buffer_object_parameteriv(ctx
, name
, pname
, params
);
2049 case GL_RENDERBUFFER_EXT
:
2050 get_renderbuffer_parameteriv(ctx
, name
, pname
, params
);
2053 _mesa_error(ctx
, GL_INVALID_ENUM
,
2054 "glGetObjectParameteriv(name = 0x%x) invalid type: %d",
2060 set_ubo_binding(struct gl_context
*ctx
,
2062 struct gl_buffer_object
*bufObj
,
2067 struct gl_uniform_buffer_binding
*binding
;
2069 binding
= &ctx
->UniformBufferBindings
[index
];
2070 if (binding
->BufferObject
== bufObj
&&
2071 binding
->Offset
== offset
&&
2072 binding
->Size
== size
&&
2073 binding
->AutomaticSize
== autoSize
) {
2077 FLUSH_VERTICES(ctx
, _NEW_BUFFER_OBJECT
);
2079 _mesa_reference_buffer_object(ctx
, &binding
->BufferObject
, bufObj
);
2080 binding
->Offset
= offset
;
2081 binding
->Size
= size
;
2082 binding
->AutomaticSize
= autoSize
;
2086 * Bind a region of a buffer object to a uniform block binding point.
2087 * \param index the uniform buffer binding point index
2088 * \param bufObj the buffer object
2089 * \param offset offset to the start of buffer object region
2090 * \param size size of the buffer object region
2093 bind_buffer_range_uniform_buffer(struct gl_context
*ctx
,
2095 struct gl_buffer_object
*bufObj
,
2099 if (index
>= ctx
->Const
.MaxUniformBufferBindings
) {
2100 _mesa_error(ctx
, GL_INVALID_VALUE
, "glBindBufferRange(index=%d)", index
);
2104 if (offset
& (ctx
->Const
.UniformBufferOffsetAlignment
- 1)) {
2105 _mesa_error(ctx
, GL_INVALID_VALUE
,
2106 "glBindBufferRange(offset misalgned %d/%d)", (int) offset
,
2107 ctx
->Const
.UniformBufferOffsetAlignment
);
2111 if (bufObj
== ctx
->Shared
->NullBufferObj
) {
2116 _mesa_reference_buffer_object(ctx
, &ctx
->UniformBuffer
, bufObj
);
2117 set_ubo_binding(ctx
, index
, bufObj
, offset
, size
, GL_FALSE
);
2122 * Bind a buffer object to a uniform block binding point.
2123 * As above, but offset = 0.
2126 bind_buffer_base_uniform_buffer(struct gl_context
*ctx
,
2128 struct gl_buffer_object
*bufObj
)
2130 if (index
>= ctx
->Const
.MaxUniformBufferBindings
) {
2131 _mesa_error(ctx
, GL_INVALID_VALUE
, "glBindBufferBase(index=%d)", index
);
2135 _mesa_reference_buffer_object(ctx
, &ctx
->UniformBuffer
, bufObj
);
2136 if (bufObj
== ctx
->Shared
->NullBufferObj
)
2137 set_ubo_binding(ctx
, index
, bufObj
, -1, -1, GL_TRUE
);
2139 set_ubo_binding(ctx
, index
, bufObj
, 0, 0, GL_TRUE
);
2143 _mesa_BindBufferRange(GLenum target
, GLuint index
,
2144 GLuint buffer
, GLintptr offset
, GLsizeiptr size
)
2146 GET_CURRENT_CONTEXT(ctx
);
2147 struct gl_buffer_object
*bufObj
;
2150 bufObj
= ctx
->Shared
->NullBufferObj
;
2152 bufObj
= _mesa_lookup_bufferobj(ctx
, buffer
);
2154 if (!handle_bind_buffer_gen(ctx
, target
, buffer
, &bufObj
))
2158 _mesa_error(ctx
, GL_INVALID_OPERATION
,
2159 "glBindBufferRange(invalid buffer=%u)", buffer
);
2164 _mesa_error(ctx
, GL_INVALID_VALUE
, "glBindBufferRange(size=%d)",
2169 if (offset
+ size
> bufObj
->Size
) {
2170 _mesa_error(ctx
, GL_INVALID_VALUE
,
2171 "glBindBufferRange(offset + size %d > buffer size %d)",
2172 (int) (offset
+ size
), (int) (bufObj
->Size
));
2177 case GL_TRANSFORM_FEEDBACK_BUFFER
:
2178 _mesa_bind_buffer_range_transform_feedback(ctx
, index
, bufObj
,
2181 case GL_UNIFORM_BUFFER
:
2182 bind_buffer_range_uniform_buffer(ctx
, index
, bufObj
, offset
, size
);
2185 _mesa_error(ctx
, GL_INVALID_ENUM
, "glBindBufferRange(target)");
2191 _mesa_BindBufferBase(GLenum target
, GLuint index
, GLuint buffer
)
2193 GET_CURRENT_CONTEXT(ctx
);
2194 struct gl_buffer_object
*bufObj
;
2197 bufObj
= ctx
->Shared
->NullBufferObj
;
2199 bufObj
= _mesa_lookup_bufferobj(ctx
, buffer
);
2201 if (!handle_bind_buffer_gen(ctx
, target
, buffer
, &bufObj
))
2205 _mesa_error(ctx
, GL_INVALID_OPERATION
,
2206 "glBindBufferBase(invalid buffer=%u)", buffer
);
2210 /* Note that there's some oddness in the GL 3.1-GL 3.3 specifications with
2211 * regards to BindBufferBase. It says (GL 3.1 core spec, page 63):
2213 * "BindBufferBase is equivalent to calling BindBufferRange with offset
2214 * zero and size equal to the size of buffer."
2216 * but it says for glGetIntegeri_v (GL 3.1 core spec, page 230):
2218 * "If the parameter (starting offset or size) was not specified when the
2219 * buffer object was bound, zero is returned."
2221 * What happens if the size of the buffer changes? Does the size of the
2222 * buffer at the moment glBindBufferBase was called still play a role, like
2223 * the first quote would imply, or is the size meaningless in the
2224 * glBindBufferBase case like the second quote would suggest? The GL 4.1
2225 * core spec page 45 says:
2227 * "It is equivalent to calling BindBufferRange with offset zero, while
2228 * size is determined by the size of the bound buffer at the time the
2231 * My interpretation is that the GL 4.1 spec was a clarification of the
2232 * behavior, not a change. In particular, this choice will only make
2233 * rendering work in cases where it would have had undefined results.
2237 case GL_TRANSFORM_FEEDBACK_BUFFER
:
2238 _mesa_bind_buffer_base_transform_feedback(ctx
, index
, bufObj
);
2240 case GL_UNIFORM_BUFFER
:
2241 bind_buffer_base_uniform_buffer(ctx
, index
, bufObj
);
2244 _mesa_error(ctx
, GL_INVALID_ENUM
, "glBindBufferBase(target)");
2250 _mesa_InvalidateBufferSubData(GLuint buffer
, GLintptr offset
,
2253 GET_CURRENT_CONTEXT(ctx
);
2254 struct gl_buffer_object
*bufObj
;
2255 const GLintptr end
= offset
+ length
;
2257 bufObj
= _mesa_lookup_bufferobj(ctx
, buffer
);
2259 _mesa_error(ctx
, GL_INVALID_VALUE
,
2260 "glInvalidateBufferSubData(name = 0x%x) invalid object",
2265 /* The GL_ARB_invalidate_subdata spec says:
2267 * "An INVALID_VALUE error is generated if <offset> or <length> is
2268 * negative, or if <offset> + <length> is greater than the value of
2271 if (end
< 0 || end
> bufObj
->Size
) {
2272 _mesa_error(ctx
, GL_INVALID_VALUE
,
2273 "glInvalidateBufferSubData(invalid offset or length)");
2277 /* The GL_ARB_invalidate_subdata spec says:
2279 * "An INVALID_OPERATION error is generated if the buffer is currently
2280 * mapped by MapBuffer, or if the invalidate range intersects the range
2281 * currently mapped by MapBufferRange."
2283 if (_mesa_bufferobj_mapped(bufObj
)) {
2284 const GLintptr mapEnd
= bufObj
->Offset
+ bufObj
->Length
;
2286 /* The regions do not overlap if and only if the end of the discard
2287 * region is before the mapped region or the start of the discard region
2288 * is after the mapped region.
2290 * Note that 'end' and 'mapEnd' are the first byte *after* the discard
2291 * region and the mapped region, repsectively. It is okay for that byte
2292 * to be mapped (for 'end') or discarded (for 'mapEnd').
2294 if (!(end
<= bufObj
->Offset
|| offset
>= mapEnd
)) {
2295 _mesa_error(ctx
, GL_INVALID_OPERATION
,
2296 "glInvalidateBufferSubData(intersection with mapped "
2302 /* We don't actually do anything for this yet. Just return after
2303 * validating the parameters and generating the required errors.
2309 _mesa_InvalidateBufferData(GLuint buffer
)
2311 GET_CURRENT_CONTEXT(ctx
);
2312 struct gl_buffer_object
*bufObj
;
2314 bufObj
= _mesa_lookup_bufferobj(ctx
, buffer
);
2316 _mesa_error(ctx
, GL_INVALID_VALUE
,
2317 "glInvalidateBufferData(name = 0x%x) invalid object",
2322 /* The GL_ARB_invalidate_subdata spec says:
2324 * "An INVALID_OPERATION error is generated if the buffer is currently
2325 * mapped by MapBuffer, or if the invalidate range intersects the range
2326 * currently mapped by MapBufferRange."
2328 if (_mesa_bufferobj_mapped(bufObj
)) {
2329 _mesa_error(ctx
, GL_INVALID_OPERATION
,
2330 "glInvalidateBufferData(intersection with mapped "
2335 /* We don't actually do anything for this yet. Just return after
2336 * validating the parameters and generating the required errors.