2 * Mesa 3-D graphics library
4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
5 * Copyright (C) 2009 VMware, Inc. All Rights Reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * 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"
45 #include "glformats.h"
47 #include "transformfeedback.h"
53 /*#define BOUNDS_CHECK*/
57 * Used as a placeholder for buffer objects between glGenBuffers() and
58 * glBindBuffer() so that glIsBuffer() can work correctly.
60 static struct gl_buffer_object DummyBufferObject
;
64 * Return pointer to address of a buffer object target.
65 * \param ctx the GL context
66 * \param target the buffer object target to be retrieved.
67 * \return pointer to pointer to the buffer object bound to \c target in the
68 * specified context or \c NULL if \c target is invalid.
70 static inline struct gl_buffer_object
**
71 get_buffer_target(struct gl_context
*ctx
, GLenum target
)
73 /* Other targets are only supported in desktop OpenGL and OpenGL ES 3.0.
75 if (!_mesa_is_desktop_gl(ctx
) && !_mesa_is_gles3(ctx
)
76 && target
!= GL_ARRAY_BUFFER
&& target
!= GL_ELEMENT_ARRAY_BUFFER
)
80 case GL_ARRAY_BUFFER_ARB
:
81 return &ctx
->Array
.ArrayBufferObj
;
82 case GL_ELEMENT_ARRAY_BUFFER_ARB
:
83 return &ctx
->Array
.ArrayObj
->ElementArrayBufferObj
;
84 case GL_PIXEL_PACK_BUFFER_EXT
:
85 return &ctx
->Pack
.BufferObj
;
86 case GL_PIXEL_UNPACK_BUFFER_EXT
:
87 return &ctx
->Unpack
.BufferObj
;
88 case GL_COPY_READ_BUFFER
:
89 return &ctx
->CopyReadBuffer
;
90 case GL_COPY_WRITE_BUFFER
:
91 return &ctx
->CopyWriteBuffer
;
92 case GL_DRAW_INDIRECT_BUFFER
:
93 if (ctx
->API
== API_OPENGL_CORE
&&
94 ctx
->Extensions
.ARB_draw_indirect
) {
95 return &ctx
->DrawIndirectBuffer
;
98 case GL_TRANSFORM_FEEDBACK_BUFFER
:
99 if (ctx
->Extensions
.EXT_transform_feedback
) {
100 return &ctx
->TransformFeedback
.CurrentBuffer
;
103 case GL_TEXTURE_BUFFER
:
104 if (ctx
->API
== API_OPENGL_CORE
&&
105 ctx
->Extensions
.ARB_texture_buffer_object
) {
106 return &ctx
->Texture
.BufferObject
;
109 case GL_UNIFORM_BUFFER
:
110 if (ctx
->Extensions
.ARB_uniform_buffer_object
) {
111 return &ctx
->UniformBuffer
;
114 case GL_ATOMIC_COUNTER_BUFFER
:
115 if (ctx
->Extensions
.ARB_shader_atomic_counters
) {
116 return &ctx
->AtomicBuffer
;
127 * Get the buffer object bound to the specified target in a GL context.
128 * \param ctx the GL context
129 * \param target the buffer object target to be retrieved.
130 * \param error the GL error to record if target is illegal.
131 * \return pointer to the buffer object bound to \c target in the
132 * specified context or \c NULL if \c target is invalid.
134 static inline struct gl_buffer_object
*
135 get_buffer(struct gl_context
*ctx
, const char *func
, GLenum target
,
138 struct gl_buffer_object
**bufObj
= get_buffer_target(ctx
, target
);
141 _mesa_error(ctx
, GL_INVALID_ENUM
, "%s(target)", func
);
145 if (!_mesa_is_bufferobj(*bufObj
)) {
146 _mesa_error(ctx
, error
, "%s(no buffer bound)", func
);
155 * Convert a GLbitfield describing the mapped buffer access flags
156 * into one of GL_READ_WRITE, GL_READ_ONLY, or GL_WRITE_ONLY.
159 simplified_access_mode(struct gl_context
*ctx
, GLbitfield access
)
161 const GLbitfield rwFlags
= GL_MAP_READ_BIT
| GL_MAP_WRITE_BIT
;
162 if ((access
& rwFlags
) == rwFlags
)
163 return GL_READ_WRITE
;
164 if ((access
& GL_MAP_READ_BIT
) == GL_MAP_READ_BIT
)
166 if ((access
& GL_MAP_WRITE_BIT
) == GL_MAP_WRITE_BIT
)
167 return GL_WRITE_ONLY
;
169 /* Otherwise, AccessFlags is zero (the default state).
171 * Table 2.6 on page 31 (page 44 of the PDF) of the OpenGL 1.5 spec says:
173 * Name Type Initial Value Legal Values
175 * BUFFER_ACCESS enum READ_WRITE READ_ONLY, WRITE_ONLY
178 * However, table 6.8 in the GL_OES_mapbuffer extension says:
180 * Get Value Type Get Command Value Description
181 * --------- ---- ----------- ----- -----------
182 * BUFFER_ACCESS_OES Z1 GetBufferParameteriv WRITE_ONLY_OES buffer map flag
184 * The difference is because GL_OES_mapbuffer only supports mapping buffers
189 return _mesa_is_gles(ctx
) ? GL_WRITE_ONLY
: GL_READ_WRITE
;
194 * Test if the buffer is mapped, and if so, if the mapped range overlaps the
196 * The regions do not overlap if and only if the end of the given
197 * region is before the mapped region or the start of the given region
198 * is after the mapped region.
200 * \param obj Buffer object target on which to operate.
201 * \param offset Offset of the first byte of the subdata range.
202 * \param size Size, in bytes, of the subdata range.
203 * \return true if ranges overlap, false otherwise
207 bufferobj_range_mapped(const struct gl_buffer_object
*obj
,
208 GLintptr offset
, GLsizeiptr size
)
210 if (_mesa_bufferobj_mapped(obj
)) {
211 const GLintptr end
= offset
+ size
;
212 const GLintptr mapEnd
= obj
->Offset
+ obj
->Length
;
214 if (!(end
<= obj
->Offset
|| offset
>= mapEnd
)) {
223 * Tests the subdata range parameters and sets the GL error code for
224 * \c glBufferSubDataARB, \c glGetBufferSubDataARB and
225 * \c glClearBufferSubData.
227 * \param ctx GL context.
228 * \param target Buffer object target on which to operate.
229 * \param offset Offset of the first byte of the subdata range.
230 * \param size Size, in bytes, of the subdata range.
231 * \param mappedRange If true, checks if an overlapping range is mapped.
232 * If false, checks if buffer is mapped.
233 * \param errorNoBuffer Error code if no buffer is bound to target.
234 * \param caller Name of calling function for recording errors.
235 * \return A pointer to the buffer object bound to \c target in the
236 * specified context or \c NULL if any of the parameter or state
237 * conditions are invalid.
239 * \sa glBufferSubDataARB, glGetBufferSubDataARB, glClearBufferSubData
241 static struct gl_buffer_object
*
242 buffer_object_subdata_range_good(struct gl_context
* ctx
, GLenum target
,
243 GLintptrARB offset
, GLsizeiptrARB size
,
244 bool mappedRange
, GLenum errorNoBuffer
,
247 struct gl_buffer_object
*bufObj
;
250 _mesa_error(ctx
, GL_INVALID_VALUE
, "%s(size < 0)", caller
);
255 _mesa_error(ctx
, GL_INVALID_VALUE
, "%s(offset < 0)", caller
);
259 bufObj
= get_buffer(ctx
, caller
, target
, errorNoBuffer
);
263 if (offset
+ size
> bufObj
->Size
) {
264 _mesa_error(ctx
, GL_INVALID_VALUE
,
265 "%s(offset %lu + size %lu > buffer size %lu)", caller
,
266 (unsigned long) offset
,
267 (unsigned long) size
,
268 (unsigned long) bufObj
->Size
);
273 if (bufferobj_range_mapped(bufObj
, offset
, size
)) {
274 _mesa_error(ctx
, GL_INVALID_OPERATION
, "%s", caller
);
279 if (_mesa_bufferobj_mapped(bufObj
)) {
280 _mesa_error(ctx
, GL_INVALID_OPERATION
, "%s", caller
);
290 * Test the format and type parameters and set the GL error code for
291 * \c glClearBufferData and \c glClearBufferSubData.
293 * \param ctx GL context.
294 * \param internalformat Format to which the data is to be converted.
295 * \param format Format of the supplied data.
296 * \param type Type of the supplied data.
297 * \param caller Name of calling function for recording errors.
298 * \return If internalformat, format and type are legal the mesa_format
299 * corresponding to internalformat, otherwise MESA_FORMAT_NONE.
301 * \sa glClearBufferData and glClearBufferSubData
304 validate_clear_buffer_format(struct gl_context
*ctx
,
305 GLenum internalformat
,
306 GLenum format
, GLenum type
,
309 mesa_format mesaFormat
;
310 GLenum errorFormatType
;
312 mesaFormat
= _mesa_validate_texbuffer_format(ctx
, internalformat
);
313 if (mesaFormat
== MESA_FORMAT_NONE
) {
314 _mesa_error(ctx
, GL_INVALID_ENUM
,
315 "%s(invalid internalformat)", caller
);
316 return MESA_FORMAT_NONE
;
319 /* NOTE: not mentioned in ARB_clear_buffer_object but according to
320 * EXT_texture_integer there is no conversion between integer and
321 * non-integer formats
323 if (_mesa_is_enum_format_signed_int(format
) !=
324 _mesa_is_format_integer_color(mesaFormat
)) {
325 _mesa_error(ctx
, GL_INVALID_OPERATION
,
326 "%s(integer vs non-integer)", caller
);
327 return MESA_FORMAT_NONE
;
330 if (!_mesa_is_color_format(format
)) {
331 _mesa_error(ctx
, GL_INVALID_ENUM
,
332 "%s(format is not a color format)", caller
);
333 return MESA_FORMAT_NONE
;
336 errorFormatType
= _mesa_error_check_format_and_type(ctx
, format
, type
);
337 if (errorFormatType
!= GL_NO_ERROR
) {
338 _mesa_error(ctx
, GL_INVALID_ENUM
,
339 "%s(invalid format or type)", caller
);
340 return MESA_FORMAT_NONE
;
348 * Convert user-specified clear value to the specified internal format.
350 * \param ctx GL context.
351 * \param internalformat Format to which the data is converted.
352 * \param clearValue Points to the converted clear value.
353 * \param format Format of the supplied data.
354 * \param type Type of the supplied data.
355 * \param data Data which is to be converted to internalformat.
356 * \param caller Name of calling function for recording errors.
357 * \return true if data could be converted, false otherwise.
359 * \sa glClearBufferData, glClearBufferSubData
362 convert_clear_buffer_data(struct gl_context
*ctx
,
363 mesa_format internalformat
,
364 GLubyte
*clearValue
, GLenum format
, GLenum type
,
365 const GLvoid
*data
, const char *caller
)
367 GLenum internalformatBase
= _mesa_get_format_base_format(internalformat
);
369 if (_mesa_texstore(ctx
, 1, internalformatBase
, internalformat
,
370 0, &clearValue
, 1, 1, 1,
371 format
, type
, data
, &ctx
->Unpack
)) {
375 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "%s", caller
);
382 * Allocate and initialize a new buffer object.
384 * Default callback for the \c dd_function_table::NewBufferObject() hook.
386 static struct gl_buffer_object
*
387 _mesa_new_buffer_object( struct gl_context
*ctx
, GLuint name
, GLenum target
)
389 struct gl_buffer_object
*obj
;
393 obj
= MALLOC_STRUCT(gl_buffer_object
);
394 _mesa_initialize_buffer_object(ctx
, obj
, name
, target
);
400 * Delete a buffer object.
402 * Default callback for the \c dd_function_table::DeleteBuffer() hook.
405 _mesa_delete_buffer_object(struct gl_context
*ctx
,
406 struct gl_buffer_object
*bufObj
)
412 /* assign strange values here to help w/ debugging */
413 bufObj
->RefCount
= -1000;
416 _glthread_DESTROY_MUTEX(bufObj
->Mutex
);
424 * Set ptr to bufObj w/ reference counting.
425 * This is normally only called from the _mesa_reference_buffer_object() macro
426 * when there's a real pointer change.
429 _mesa_reference_buffer_object_(struct gl_context
*ctx
,
430 struct gl_buffer_object
**ptr
,
431 struct gl_buffer_object
*bufObj
)
434 /* Unreference the old buffer */
435 GLboolean deleteFlag
= GL_FALSE
;
436 struct gl_buffer_object
*oldObj
= *ptr
;
438 _glthread_LOCK_MUTEX(oldObj
->Mutex
);
439 ASSERT(oldObj
->RefCount
> 0);
442 printf("BufferObj %p %d DECR to %d\n",
443 (void *) oldObj
, oldObj
->Name
, oldObj
->RefCount
);
445 deleteFlag
= (oldObj
->RefCount
== 0);
446 _glthread_UNLOCK_MUTEX(oldObj
->Mutex
);
450 /* some sanity checking: don't delete a buffer still in use */
452 /* unfortunately, these tests are invalid during context tear-down */
453 ASSERT(ctx
->Array
.ArrayBufferObj
!= bufObj
);
454 ASSERT(ctx
->Array
.ArrayObj
->ElementArrayBufferObj
!= bufObj
);
455 ASSERT(ctx
->Array
.ArrayObj
->Vertex
.BufferObj
!= bufObj
);
458 ASSERT(ctx
->Driver
.DeleteBuffer
);
459 ctx
->Driver
.DeleteBuffer(ctx
, oldObj
);
467 /* reference new buffer */
468 _glthread_LOCK_MUTEX(bufObj
->Mutex
);
469 if (bufObj
->RefCount
== 0) {
470 /* this buffer's being deleted (look just above) */
471 /* Not sure this can every really happen. Warn if it does. */
472 _mesa_problem(NULL
, "referencing deleted buffer object");
478 printf("BufferObj %p %d INCR to %d\n",
479 (void *) bufObj
, bufObj
->Name
, bufObj
->RefCount
);
483 _glthread_UNLOCK_MUTEX(bufObj
->Mutex
);
489 * Initialize a buffer object to default values.
492 _mesa_initialize_buffer_object( struct gl_context
*ctx
,
493 struct gl_buffer_object
*obj
,
494 GLuint name
, GLenum target
)
498 memset(obj
, 0, sizeof(struct gl_buffer_object
));
499 _glthread_INIT_MUTEX(obj
->Mutex
);
502 obj
->Usage
= GL_STATIC_DRAW_ARB
;
503 obj
->AccessFlags
= 0;
509 * Callback called from _mesa_HashWalk()
512 count_buffer_size(GLuint key
, void *data
, void *userData
)
514 const struct gl_buffer_object
*bufObj
=
515 (const struct gl_buffer_object
*) data
;
516 GLuint
*total
= (GLuint
*) userData
;
518 *total
= *total
+ bufObj
->Size
;
523 * Compute total size (in bytes) of all buffer objects for the given context.
524 * For debugging purposes.
527 _mesa_total_buffer_object_memory(struct gl_context
*ctx
)
531 _mesa_HashWalk(ctx
->Shared
->BufferObjects
, count_buffer_size
, &total
);
538 * Allocate space for and store data in a buffer object. Any data that was
539 * previously stored in the buffer object is lost. If \c data is \c NULL,
540 * memory will be allocated, but no copy will occur.
542 * This is the default callback for \c dd_function_table::BufferData()
543 * Note that all GL error checking will have been done already.
545 * \param ctx GL context.
546 * \param target Buffer object target on which to operate.
547 * \param size Size, in bytes, of the new data store.
548 * \param data Pointer to the data to store in the buffer object. This
549 * pointer may be \c NULL.
550 * \param usage Hints about how the data will be used.
551 * \param bufObj Object to be used.
553 * \return GL_TRUE for success, GL_FALSE for failure
554 * \sa glBufferDataARB, dd_function_table::BufferData.
557 _mesa_buffer_data( struct gl_context
*ctx
, GLenum target
, GLsizeiptrARB size
,
558 const GLvoid
* data
, GLenum usage
,
559 struct gl_buffer_object
* bufObj
)
566 _mesa_align_free( bufObj
->Data
);
568 new_data
= _mesa_align_malloc( size
, ctx
->Const
.MinMapBufferAlignment
);
570 bufObj
->Data
= (GLubyte
*) new_data
;
572 bufObj
->Usage
= usage
;
575 memcpy( bufObj
->Data
, data
, size
);
587 * Replace data in a subrange of buffer object. If the data range
588 * specified by \c size + \c offset extends beyond the end of the buffer or
589 * if \c data is \c NULL, no copy is performed.
591 * This is the default callback for \c dd_function_table::BufferSubData()
592 * Note that all GL error checking will have been done already.
594 * \param ctx GL context.
595 * \param offset Offset of the first byte to be modified.
596 * \param size Size, in bytes, of the data range.
597 * \param data Pointer to the data to store in the buffer object.
598 * \param bufObj Object to be used.
600 * \sa glBufferSubDataARB, dd_function_table::BufferSubData.
603 _mesa_buffer_subdata( struct gl_context
*ctx
, GLintptrARB offset
,
604 GLsizeiptrARB size
, const GLvoid
* data
,
605 struct gl_buffer_object
* bufObj
)
609 /* this should have been caught in _mesa_BufferSubData() */
610 ASSERT(size
+ offset
<= bufObj
->Size
);
613 memcpy( (GLubyte
*) bufObj
->Data
+ offset
, data
, size
);
619 * Retrieve data from a subrange of buffer object. If the data range
620 * specified by \c size + \c offset extends beyond the end of the buffer or
621 * if \c data is \c NULL, no copy is performed.
623 * This is the default callback for \c dd_function_table::GetBufferSubData()
624 * Note that all GL error checking will have been done already.
626 * \param ctx GL context.
627 * \param target Buffer object target on which to operate.
628 * \param offset Offset of the first byte to be fetched.
629 * \param size Size, in bytes, of the data range.
630 * \param data Destination for data
631 * \param bufObj Object to be used.
633 * \sa glBufferGetSubDataARB, dd_function_table::GetBufferSubData.
636 _mesa_buffer_get_subdata( struct gl_context
*ctx
, GLintptrARB offset
,
637 GLsizeiptrARB size
, GLvoid
* data
,
638 struct gl_buffer_object
* bufObj
)
642 if (bufObj
->Data
&& ((GLsizeiptrARB
) (size
+ offset
) <= bufObj
->Size
)) {
643 memcpy( data
, (GLubyte
*) bufObj
->Data
+ offset
, size
);
649 * Clear a subrange of the buffer object with copies of the supplied data.
650 * If data is NULL the buffer is filled with zeros.
652 * This is the default callback for \c dd_function_table::ClearBufferSubData()
653 * Note that all GL error checking will have been done already.
655 * \param ctx GL context.
656 * \param offset Offset of the first byte to be cleared.
657 * \param size Size, in bytes, of the to be cleared range.
658 * \param clearValue Source of the data.
659 * \param clearValueSize Size, in bytes, of the supplied data.
660 * \param bufObj Object to be cleared.
662 * \sa glClearBufferSubData, glClearBufferData and
663 * dd_function_table::ClearBufferSubData.
666 _mesa_buffer_clear_subdata(struct gl_context
*ctx
,
667 GLintptr offset
, GLsizeiptr size
,
668 const GLvoid
*clearValue
,
669 GLsizeiptr clearValueSize
,
670 struct gl_buffer_object
*bufObj
)
675 if (_mesa_bufferobj_mapped(bufObj
)) {
676 GLubyte
*data
= malloc(size
);
677 GLubyte
*dataStart
= data
;
679 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glClearBuffer[Sub]Data");
683 if (clearValue
== NULL
) {
684 /* Clear with zeros, per the spec */
685 memset(data
, 0, size
);
688 for (i
= 0; i
< size
/clearValueSize
; ++i
) {
689 memcpy(data
, clearValue
, clearValueSize
);
690 data
+= clearValueSize
;
693 ctx
->Driver
.BufferSubData(ctx
, offset
, size
, dataStart
, bufObj
);
697 ASSERT(ctx
->Driver
.MapBufferRange
);
698 dest
= ctx
->Driver
.MapBufferRange(ctx
, offset
, size
,
700 GL_MAP_INVALIDATE_RANGE_BIT
,
704 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glClearBuffer[Sub]Data");
708 if (clearValue
== NULL
) {
709 /* Clear with zeros, per the spec */
710 memset(dest
, 0, size
);
711 ctx
->Driver
.UnmapBuffer(ctx
, bufObj
);
715 for (i
= 0; i
< size
/clearValueSize
; ++i
) {
716 memcpy(dest
, clearValue
, clearValueSize
);
717 dest
+= clearValueSize
;
720 ctx
->Driver
.UnmapBuffer(ctx
, bufObj
);
725 * Default fallback for \c dd_function_table::MapBufferRange().
726 * Called via glMapBufferRange().
729 _mesa_buffer_map_range( struct gl_context
*ctx
, GLintptr offset
,
730 GLsizeiptr length
, GLbitfield access
,
731 struct gl_buffer_object
*bufObj
)
734 assert(!_mesa_bufferobj_mapped(bufObj
));
735 /* Just return a direct pointer to the data */
736 bufObj
->Pointer
= bufObj
->Data
+ offset
;
737 bufObj
->Length
= length
;
738 bufObj
->Offset
= offset
;
739 bufObj
->AccessFlags
= access
;
740 return bufObj
->Pointer
;
745 * Default fallback for \c dd_function_table::FlushMappedBufferRange().
746 * Called via glFlushMappedBufferRange().
749 _mesa_buffer_flush_mapped_range( struct gl_context
*ctx
,
750 GLintptr offset
, GLsizeiptr length
,
751 struct gl_buffer_object
*obj
)
762 * Default callback for \c dd_function_table::MapBuffer().
764 * The input parameters will have been already tested for errors.
766 * \sa glUnmapBufferARB, dd_function_table::UnmapBuffer
769 _mesa_buffer_unmap( struct gl_context
*ctx
, struct gl_buffer_object
*bufObj
)
772 /* XXX we might assert here that bufObj->Pointer is non-null */
773 bufObj
->Pointer
= NULL
;
776 bufObj
->AccessFlags
= 0x0;
782 * Default fallback for \c dd_function_table::CopyBufferSubData().
783 * Called via glCopyBufferSubData().
786 _mesa_copy_buffer_subdata(struct gl_context
*ctx
,
787 struct gl_buffer_object
*src
,
788 struct gl_buffer_object
*dst
,
789 GLintptr readOffset
, GLintptr writeOffset
,
792 GLubyte
*srcPtr
, *dstPtr
;
794 /* the buffers should not be mapped */
795 assert(!_mesa_bufferobj_mapped(src
));
796 assert(!_mesa_bufferobj_mapped(dst
));
799 srcPtr
= dstPtr
= ctx
->Driver
.MapBufferRange(ctx
, 0, src
->Size
,
801 GL_MAP_WRITE_BIT
, src
);
806 srcPtr
+= readOffset
;
807 dstPtr
+= writeOffset
;
809 srcPtr
= ctx
->Driver
.MapBufferRange(ctx
, readOffset
, size
,
810 GL_MAP_READ_BIT
, src
);
811 dstPtr
= ctx
->Driver
.MapBufferRange(ctx
, writeOffset
, size
,
813 GL_MAP_INVALIDATE_RANGE_BIT
), dst
);
816 /* Note: the src and dst regions will never overlap. Trying to do so
817 * would generate GL_INVALID_VALUE earlier.
819 if (srcPtr
&& dstPtr
)
820 memcpy(dstPtr
, srcPtr
, size
);
822 ctx
->Driver
.UnmapBuffer(ctx
, src
);
824 ctx
->Driver
.UnmapBuffer(ctx
, dst
);
830 * Initialize the state associated with buffer objects
833 _mesa_init_buffer_objects( struct gl_context
*ctx
)
837 memset(&DummyBufferObject
, 0, sizeof(DummyBufferObject
));
838 _glthread_INIT_MUTEX(DummyBufferObject
.Mutex
);
839 DummyBufferObject
.RefCount
= 1000*1000*1000; /* never delete */
841 _mesa_reference_buffer_object(ctx
, &ctx
->Array
.ArrayBufferObj
,
842 ctx
->Shared
->NullBufferObj
);
844 _mesa_reference_buffer_object(ctx
, &ctx
->CopyReadBuffer
,
845 ctx
->Shared
->NullBufferObj
);
846 _mesa_reference_buffer_object(ctx
, &ctx
->CopyWriteBuffer
,
847 ctx
->Shared
->NullBufferObj
);
849 _mesa_reference_buffer_object(ctx
, &ctx
->UniformBuffer
,
850 ctx
->Shared
->NullBufferObj
);
852 _mesa_reference_buffer_object(ctx
, &ctx
->DrawIndirectBuffer
,
853 ctx
->Shared
->NullBufferObj
);
855 for (i
= 0; i
< MAX_COMBINED_UNIFORM_BUFFERS
; i
++) {
856 _mesa_reference_buffer_object(ctx
,
857 &ctx
->UniformBufferBindings
[i
].BufferObject
,
858 ctx
->Shared
->NullBufferObj
);
859 ctx
->UniformBufferBindings
[i
].Offset
= -1;
860 ctx
->UniformBufferBindings
[i
].Size
= -1;
866 _mesa_free_buffer_objects( struct gl_context
*ctx
)
870 _mesa_reference_buffer_object(ctx
, &ctx
->Array
.ArrayBufferObj
, NULL
);
872 _mesa_reference_buffer_object(ctx
, &ctx
->CopyReadBuffer
, NULL
);
873 _mesa_reference_buffer_object(ctx
, &ctx
->CopyWriteBuffer
, NULL
);
875 _mesa_reference_buffer_object(ctx
, &ctx
->UniformBuffer
, NULL
);
877 _mesa_reference_buffer_object(ctx
, &ctx
->DrawIndirectBuffer
, NULL
);
879 for (i
= 0; i
< MAX_COMBINED_UNIFORM_BUFFERS
; i
++) {
880 _mesa_reference_buffer_object(ctx
,
881 &ctx
->UniformBufferBindings
[i
].BufferObject
,
887 _mesa_handle_bind_buffer_gen(struct gl_context
*ctx
,
890 struct gl_buffer_object
**buf_handle
,
893 struct gl_buffer_object
*buf
= *buf_handle
;
895 if (!buf
&& ctx
->API
== API_OPENGL_CORE
) {
896 _mesa_error(ctx
, GL_INVALID_OPERATION
, "%s(non-gen name)", caller
);
900 if (!buf
|| buf
== &DummyBufferObject
) {
901 /* If this is a new buffer object id, or one which was generated but
902 * never used before, allocate a buffer object now.
904 ASSERT(ctx
->Driver
.NewBufferObject
);
905 buf
= ctx
->Driver
.NewBufferObject(ctx
, buffer
, target
);
907 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "%s", caller
);
910 _mesa_HashInsert(ctx
->Shared
->BufferObjects
, buffer
, buf
);
918 * Bind the specified target to buffer for the specified context.
919 * Called by glBindBuffer() and other functions.
922 bind_buffer_object(struct gl_context
*ctx
, GLenum target
, GLuint buffer
)
924 struct gl_buffer_object
*oldBufObj
;
925 struct gl_buffer_object
*newBufObj
= NULL
;
926 struct gl_buffer_object
**bindTarget
= NULL
;
928 bindTarget
= get_buffer_target(ctx
, target
);
930 _mesa_error(ctx
, GL_INVALID_ENUM
, "glBindBufferARB(target 0x%x)", target
);
934 /* Get pointer to old buffer object (to be unbound) */
935 oldBufObj
= *bindTarget
;
936 if (oldBufObj
&& oldBufObj
->Name
== buffer
&& !oldBufObj
->DeletePending
)
937 return; /* rebinding the same buffer object- no change */
940 * Get pointer to new buffer object (newBufObj)
943 /* The spec says there's not a buffer object named 0, but we use
944 * one internally because it simplifies things.
946 newBufObj
= ctx
->Shared
->NullBufferObj
;
949 /* non-default buffer object */
950 newBufObj
= _mesa_lookup_bufferobj(ctx
, buffer
);
951 if (!_mesa_handle_bind_buffer_gen(ctx
, target
, buffer
,
952 &newBufObj
, "glBindBuffer"))
956 /* bind new buffer */
957 _mesa_reference_buffer_object(ctx
, bindTarget
, newBufObj
);
959 /* Pass BindBuffer call to device driver */
960 if (ctx
->Driver
.BindBuffer
)
961 ctx
->Driver
.BindBuffer( ctx
, target
, newBufObj
);
966 * Update the default buffer objects in the given context to reference those
967 * specified in the shared state and release those referencing the old
971 _mesa_update_default_objects_buffer_objects(struct gl_context
*ctx
)
973 /* Bind the NullBufferObj to remove references to those
974 * in the shared context hash table.
976 bind_buffer_object( ctx
, GL_ARRAY_BUFFER_ARB
, 0);
977 bind_buffer_object( ctx
, GL_ELEMENT_ARRAY_BUFFER_ARB
, 0);
978 bind_buffer_object( ctx
, GL_PIXEL_PACK_BUFFER_ARB
, 0);
979 bind_buffer_object( ctx
, GL_PIXEL_UNPACK_BUFFER_ARB
, 0);
985 * Return the gl_buffer_object for the given ID.
986 * Always return NULL for ID 0.
988 struct gl_buffer_object
*
989 _mesa_lookup_bufferobj(struct gl_context
*ctx
, GLuint buffer
)
994 return (struct gl_buffer_object
*)
995 _mesa_HashLookup(ctx
->Shared
->BufferObjects
, buffer
);
1000 * If *ptr points to obj, set ptr = the Null/default buffer object.
1001 * This is a helper for buffer object deletion.
1002 * The GL spec says that deleting a buffer object causes it to get
1003 * unbound from all arrays in the current context.
1006 unbind(struct gl_context
*ctx
,
1007 struct gl_buffer_object
**ptr
,
1008 struct gl_buffer_object
*obj
)
1011 _mesa_reference_buffer_object(ctx
, ptr
, ctx
->Shared
->NullBufferObj
);
1017 * Plug default/fallback buffer object functions into the device
1021 _mesa_init_buffer_object_functions(struct dd_function_table
*driver
)
1023 /* GL_ARB_vertex/pixel_buffer_object */
1024 driver
->NewBufferObject
= _mesa_new_buffer_object
;
1025 driver
->DeleteBuffer
= _mesa_delete_buffer_object
;
1026 driver
->BindBuffer
= NULL
;
1027 driver
->BufferData
= _mesa_buffer_data
;
1028 driver
->BufferSubData
= _mesa_buffer_subdata
;
1029 driver
->GetBufferSubData
= _mesa_buffer_get_subdata
;
1030 driver
->UnmapBuffer
= _mesa_buffer_unmap
;
1032 /* GL_ARB_clear_buffer_object */
1033 driver
->ClearBufferSubData
= _mesa_buffer_clear_subdata
;
1035 /* GL_ARB_map_buffer_range */
1036 driver
->MapBufferRange
= _mesa_buffer_map_range
;
1037 driver
->FlushMappedBufferRange
= _mesa_buffer_flush_mapped_range
;
1039 /* GL_ARB_copy_buffer */
1040 driver
->CopyBufferSubData
= _mesa_copy_buffer_subdata
;
1045 /**********************************************************************/
1047 /**********************************************************************/
1050 _mesa_BindBuffer(GLenum target
, GLuint buffer
)
1052 GET_CURRENT_CONTEXT(ctx
);
1054 if (MESA_VERBOSE
& VERBOSE_API
)
1055 _mesa_debug(ctx
, "glBindBuffer(%s, %u)\n",
1056 _mesa_lookup_enum_by_nr(target
), buffer
);
1058 bind_buffer_object(ctx
, target
, buffer
);
1063 * Delete a set of buffer objects.
1065 * \param n Number of buffer objects to delete.
1066 * \param ids Array of \c n buffer object IDs.
1069 _mesa_DeleteBuffers(GLsizei n
, const GLuint
*ids
)
1071 GET_CURRENT_CONTEXT(ctx
);
1073 FLUSH_VERTICES(ctx
, 0);
1076 _mesa_error(ctx
, GL_INVALID_VALUE
, "glDeleteBuffersARB(n)");
1080 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
1082 for (i
= 0; i
< n
; i
++) {
1083 struct gl_buffer_object
*bufObj
= _mesa_lookup_bufferobj(ctx
, ids
[i
]);
1085 struct gl_array_object
*arrayObj
= ctx
->Array
.ArrayObj
;
1088 ASSERT(bufObj
->Name
== ids
[i
] || bufObj
== &DummyBufferObject
);
1090 if (_mesa_bufferobj_mapped(bufObj
)) {
1091 /* if mapped, unmap it now */
1092 ctx
->Driver
.UnmapBuffer(ctx
, bufObj
);
1093 bufObj
->AccessFlags
= 0;
1094 bufObj
->Pointer
= NULL
;
1097 /* unbind any vertex pointers bound to this buffer */
1098 for (j
= 0; j
< Elements(arrayObj
->VertexBinding
); j
++) {
1099 unbind(ctx
, &arrayObj
->VertexBinding
[j
].BufferObj
, bufObj
);
1102 if (ctx
->Array
.ArrayBufferObj
== bufObj
) {
1103 _mesa_BindBuffer( GL_ARRAY_BUFFER_ARB
, 0 );
1105 if (arrayObj
->ElementArrayBufferObj
== bufObj
) {
1106 _mesa_BindBuffer( GL_ELEMENT_ARRAY_BUFFER_ARB
, 0 );
1109 /* unbind ARB_draw_indirect binding point */
1110 if (ctx
->DrawIndirectBuffer
== bufObj
) {
1111 _mesa_BindBuffer( GL_DRAW_INDIRECT_BUFFER
, 0 );
1114 /* unbind ARB_copy_buffer binding points */
1115 if (ctx
->CopyReadBuffer
== bufObj
) {
1116 _mesa_BindBuffer( GL_COPY_READ_BUFFER
, 0 );
1118 if (ctx
->CopyWriteBuffer
== bufObj
) {
1119 _mesa_BindBuffer( GL_COPY_WRITE_BUFFER
, 0 );
1122 /* unbind transform feedback binding points */
1123 if (ctx
->TransformFeedback
.CurrentBuffer
== bufObj
) {
1124 _mesa_BindBuffer( GL_TRANSFORM_FEEDBACK_BUFFER
, 0 );
1126 for (j
= 0; j
< MAX_FEEDBACK_BUFFERS
; j
++) {
1127 if (ctx
->TransformFeedback
.CurrentObject
->Buffers
[j
] == bufObj
) {
1128 _mesa_BindBufferBase( GL_TRANSFORM_FEEDBACK_BUFFER
, j
, 0 );
1132 /* unbind UBO binding points */
1133 for (j
= 0; j
< ctx
->Const
.MaxUniformBufferBindings
; j
++) {
1134 if (ctx
->UniformBufferBindings
[j
].BufferObject
== bufObj
) {
1135 _mesa_BindBufferBase( GL_UNIFORM_BUFFER
, j
, 0 );
1139 if (ctx
->UniformBuffer
== bufObj
) {
1140 _mesa_BindBuffer( GL_UNIFORM_BUFFER
, 0 );
1143 /* unbind any pixel pack/unpack pointers bound to this buffer */
1144 if (ctx
->Pack
.BufferObj
== bufObj
) {
1145 _mesa_BindBuffer( GL_PIXEL_PACK_BUFFER_EXT
, 0 );
1147 if (ctx
->Unpack
.BufferObj
== bufObj
) {
1148 _mesa_BindBuffer( GL_PIXEL_UNPACK_BUFFER_EXT
, 0 );
1151 if (ctx
->Texture
.BufferObject
== bufObj
) {
1152 _mesa_BindBuffer( GL_TEXTURE_BUFFER
, 0 );
1155 /* The ID is immediately freed for re-use */
1156 _mesa_HashRemove(ctx
->Shared
->BufferObjects
, ids
[i
]);
1157 /* Make sure we do not run into the classic ABA problem on bind.
1158 * We don't want to allow re-binding a buffer object that's been
1159 * "deleted" by glDeleteBuffers().
1161 * The explicit rebinding to the default object in the current context
1162 * prevents the above in the current context, but another context
1163 * sharing the same objects might suffer from this problem.
1164 * The alternative would be to do the hash lookup in any case on bind
1165 * which would introduce more runtime overhead than this.
1167 bufObj
->DeletePending
= GL_TRUE
;
1168 _mesa_reference_buffer_object(ctx
, &bufObj
, NULL
);
1172 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
1177 * Generate a set of unique buffer object IDs and store them in \c buffer.
1179 * \param n Number of IDs to generate.
1180 * \param buffer Array of \c n locations to store the IDs.
1183 _mesa_GenBuffers(GLsizei n
, GLuint
*buffer
)
1185 GET_CURRENT_CONTEXT(ctx
);
1189 if (MESA_VERBOSE
& VERBOSE_API
)
1190 _mesa_debug(ctx
, "glGenBuffers(%d)\n", n
);
1193 _mesa_error(ctx
, GL_INVALID_VALUE
, "glGenBuffersARB");
1202 * This must be atomic (generation and allocation of buffer object IDs)
1204 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
1206 first
= _mesa_HashFindFreeKeyBlock(ctx
->Shared
->BufferObjects
, n
);
1208 /* Insert the ID and pointer to dummy buffer object into hash table */
1209 for (i
= 0; i
< n
; i
++) {
1210 _mesa_HashInsert(ctx
->Shared
->BufferObjects
, first
+ i
,
1211 &DummyBufferObject
);
1212 buffer
[i
] = first
+ i
;
1215 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
1220 * Determine if ID is the name of a buffer object.
1222 * \param id ID of the potential buffer object.
1223 * \return \c GL_TRUE if \c id is the name of a buffer object,
1224 * \c GL_FALSE otherwise.
1226 GLboolean GLAPIENTRY
1227 _mesa_IsBuffer(GLuint id
)
1229 struct gl_buffer_object
*bufObj
;
1230 GET_CURRENT_CONTEXT(ctx
);
1231 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, GL_FALSE
);
1233 _glthread_LOCK_MUTEX(ctx
->Shared
->Mutex
);
1234 bufObj
= _mesa_lookup_bufferobj(ctx
, id
);
1235 _glthread_UNLOCK_MUTEX(ctx
->Shared
->Mutex
);
1237 return bufObj
&& bufObj
!= &DummyBufferObject
;
1242 _mesa_BufferData(GLenum target
, GLsizeiptrARB size
,
1243 const GLvoid
* data
, GLenum usage
)
1245 GET_CURRENT_CONTEXT(ctx
);
1246 struct gl_buffer_object
*bufObj
;
1249 if (MESA_VERBOSE
& VERBOSE_API
)
1250 _mesa_debug(ctx
, "glBufferData(%s, %ld, %p, %s)\n",
1251 _mesa_lookup_enum_by_nr(target
),
1252 (long int) size
, data
,
1253 _mesa_lookup_enum_by_nr(usage
));
1256 _mesa_error(ctx
, GL_INVALID_VALUE
, "glBufferDataARB(size < 0)");
1261 case GL_STREAM_DRAW_ARB
:
1262 valid_usage
= (ctx
->API
!= API_OPENGLES
);
1265 case GL_STATIC_DRAW_ARB
:
1266 case GL_DYNAMIC_DRAW_ARB
:
1270 case GL_STREAM_READ_ARB
:
1271 case GL_STREAM_COPY_ARB
:
1272 case GL_STATIC_READ_ARB
:
1273 case GL_STATIC_COPY_ARB
:
1274 case GL_DYNAMIC_READ_ARB
:
1275 case GL_DYNAMIC_COPY_ARB
:
1276 valid_usage
= _mesa_is_desktop_gl(ctx
) || _mesa_is_gles3(ctx
);
1280 valid_usage
= false;
1285 _mesa_error(ctx
, GL_INVALID_ENUM
, "glBufferData(usage)");
1289 bufObj
= get_buffer(ctx
, "glBufferDataARB", target
, GL_INVALID_OPERATION
);
1293 if (_mesa_bufferobj_mapped(bufObj
)) {
1294 /* Unmap the existing buffer. We'll replace it now. Not an error. */
1295 ctx
->Driver
.UnmapBuffer(ctx
, bufObj
);
1296 bufObj
->AccessFlags
= 0;
1297 ASSERT(bufObj
->Pointer
== NULL
);
1300 FLUSH_VERTICES(ctx
, _NEW_BUFFER_OBJECT
);
1302 bufObj
->Written
= GL_TRUE
;
1305 printf("glBufferDataARB(%u, sz %ld, from %p, usage 0x%x)\n",
1306 bufObj
->Name
, size
, data
, usage
);
1313 ASSERT(ctx
->Driver
.BufferData
);
1314 if (!ctx
->Driver
.BufferData( ctx
, target
, size
, data
, usage
, bufObj
)) {
1315 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glBufferDataARB()");
1321 _mesa_BufferSubData(GLenum target
, GLintptrARB offset
,
1322 GLsizeiptrARB size
, const GLvoid
* data
)
1324 GET_CURRENT_CONTEXT(ctx
);
1325 struct gl_buffer_object
*bufObj
;
1327 bufObj
= buffer_object_subdata_range_good( ctx
, target
, offset
, size
,
1328 false, GL_INVALID_OPERATION
,
1329 "glBufferSubDataARB" );
1331 /* error already recorded */
1338 bufObj
->Written
= GL_TRUE
;
1340 ASSERT(ctx
->Driver
.BufferSubData
);
1341 ctx
->Driver
.BufferSubData( ctx
, offset
, size
, data
, bufObj
);
1346 _mesa_GetBufferSubData(GLenum target
, GLintptrARB offset
,
1347 GLsizeiptrARB size
, void * data
)
1349 GET_CURRENT_CONTEXT(ctx
);
1350 struct gl_buffer_object
*bufObj
;
1352 bufObj
= buffer_object_subdata_range_good(ctx
, target
, offset
, size
,
1353 false, GL_INVALID_OPERATION
,
1354 "glGetBufferSubDataARB");
1356 /* error already recorded */
1360 ASSERT(ctx
->Driver
.GetBufferSubData
);
1361 ctx
->Driver
.GetBufferSubData( ctx
, offset
, size
, data
, bufObj
);
1366 _mesa_ClearBufferData(GLenum target
, GLenum internalformat
, GLenum format
,
1367 GLenum type
, const GLvoid
* data
)
1369 GET_CURRENT_CONTEXT(ctx
);
1370 struct gl_buffer_object
* bufObj
;
1371 mesa_format mesaFormat
;
1372 GLubyte clearValue
[MAX_PIXEL_BYTES
];
1373 GLsizeiptr clearValueSize
;
1375 bufObj
= get_buffer(ctx
, "glClearBufferData", target
, GL_INVALID_VALUE
);
1380 if (_mesa_bufferobj_mapped(bufObj
)) {
1381 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1382 "glClearBufferData(buffer currently mapped)");
1386 mesaFormat
= validate_clear_buffer_format(ctx
, internalformat
,
1388 "glClearBufferData");
1389 if (mesaFormat
== MESA_FORMAT_NONE
) {
1393 clearValueSize
= _mesa_get_format_bytes(mesaFormat
);
1394 if (bufObj
->Size
% clearValueSize
!= 0) {
1395 _mesa_error(ctx
, GL_INVALID_VALUE
,
1396 "glClearBufferData(size is not a multiple of "
1397 "internalformat size)");
1402 /* clear to zeros, per the spec */
1403 ctx
->Driver
.ClearBufferSubData(ctx
, 0, bufObj
->Size
,
1408 if (!convert_clear_buffer_data(ctx
, mesaFormat
, clearValue
,
1409 format
, type
, data
, "glClearBufferData")) {
1413 ctx
->Driver
.ClearBufferSubData(ctx
, 0, bufObj
->Size
,
1414 clearValue
, clearValueSize
, bufObj
);
1419 _mesa_ClearBufferSubData(GLenum target
, GLenum internalformat
,
1420 GLintptr offset
, GLsizeiptr size
,
1421 GLenum format
, GLenum type
,
1424 GET_CURRENT_CONTEXT(ctx
);
1425 struct gl_buffer_object
* bufObj
;
1426 mesa_format mesaFormat
;
1427 GLubyte clearValue
[MAX_PIXEL_BYTES
];
1428 GLsizeiptr clearValueSize
;
1430 bufObj
= buffer_object_subdata_range_good(ctx
, target
, offset
, size
,
1431 true, GL_INVALID_VALUE
,
1432 "glClearBufferSubData");
1437 mesaFormat
= validate_clear_buffer_format(ctx
, internalformat
,
1439 "glClearBufferSubData");
1440 if (mesaFormat
== MESA_FORMAT_NONE
) {
1444 clearValueSize
= _mesa_get_format_bytes(mesaFormat
);
1445 if (offset
% clearValueSize
!= 0 || size
% clearValueSize
!= 0) {
1446 _mesa_error(ctx
, GL_INVALID_VALUE
,
1447 "glClearBufferSubData(offset or size is not a multiple of "
1448 "internalformat size)");
1453 /* clear to zeros, per the spec */
1454 ctx
->Driver
.ClearBufferSubData(ctx
, offset
, size
,
1459 if (!convert_clear_buffer_data(ctx
, mesaFormat
, clearValue
,
1461 "glClearBufferSubData")) {
1465 ctx
->Driver
.ClearBufferSubData(ctx
, offset
, size
,
1466 clearValue
, clearValueSize
, bufObj
);
1471 _mesa_MapBuffer(GLenum target
, GLenum access
)
1473 GET_CURRENT_CONTEXT(ctx
);
1474 struct gl_buffer_object
* bufObj
;
1475 GLbitfield accessFlags
;
1479 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, NULL
);
1482 case GL_READ_ONLY_ARB
:
1483 accessFlags
= GL_MAP_READ_BIT
;
1484 valid_access
= _mesa_is_desktop_gl(ctx
);
1486 case GL_WRITE_ONLY_ARB
:
1487 accessFlags
= GL_MAP_WRITE_BIT
;
1488 valid_access
= true;
1490 case GL_READ_WRITE_ARB
:
1491 accessFlags
= GL_MAP_READ_BIT
| GL_MAP_WRITE_BIT
;
1492 valid_access
= _mesa_is_desktop_gl(ctx
);
1495 valid_access
= false;
1499 if (!valid_access
) {
1500 _mesa_error(ctx
, GL_INVALID_ENUM
, "glMapBufferARB(access)");
1504 bufObj
= get_buffer(ctx
, "glMapBufferARB", target
, GL_INVALID_OPERATION
);
1508 if (_mesa_bufferobj_mapped(bufObj
)) {
1509 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glMapBufferARB(already mapped)");
1513 if (!bufObj
->Size
) {
1514 _mesa_error(ctx
, GL_OUT_OF_MEMORY
,
1515 "glMapBuffer(buffer size = 0)");
1519 ASSERT(ctx
->Driver
.MapBufferRange
);
1520 map
= ctx
->Driver
.MapBufferRange(ctx
, 0, bufObj
->Size
, accessFlags
, bufObj
);
1522 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glMapBufferARB(map failed)");
1526 /* The driver callback should have set these fields.
1527 * This is important because other modules (like VBO) might call
1528 * the driver function directly.
1530 ASSERT(bufObj
->Pointer
== map
);
1531 ASSERT(bufObj
->Length
== bufObj
->Size
);
1532 ASSERT(bufObj
->Offset
== 0);
1533 bufObj
->AccessFlags
= accessFlags
;
1536 if (access
== GL_WRITE_ONLY_ARB
|| access
== GL_READ_WRITE_ARB
)
1537 bufObj
->Written
= GL_TRUE
;
1540 printf("glMapBufferARB(%u, sz %ld, access 0x%x)\n",
1541 bufObj
->Name
, bufObj
->Size
, access
);
1542 if (access
== GL_WRITE_ONLY_ARB
) {
1544 GLubyte
*b
= (GLubyte
*) bufObj
->Pointer
;
1545 for (i
= 0; i
< bufObj
->Size
; i
++)
1552 GLubyte
*buf
= (GLubyte
*) bufObj
->Pointer
;
1554 /* buffer is 100 bytes larger than requested, fill with magic value */
1555 for (i
= 0; i
< 100; i
++) {
1556 buf
[bufObj
->Size
- i
- 1] = 123;
1561 return bufObj
->Pointer
;
1565 GLboolean GLAPIENTRY
1566 _mesa_UnmapBuffer(GLenum target
)
1568 GET_CURRENT_CONTEXT(ctx
);
1569 struct gl_buffer_object
*bufObj
;
1570 GLboolean status
= GL_TRUE
;
1571 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, GL_FALSE
);
1573 bufObj
= get_buffer(ctx
, "glUnmapBufferARB", target
, GL_INVALID_OPERATION
);
1577 if (!_mesa_bufferobj_mapped(bufObj
)) {
1578 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glUnmapBufferARB");
1583 if (bufObj
->Access
!= GL_READ_ONLY_ARB
) {
1584 GLubyte
*buf
= (GLubyte
*) bufObj
->Pointer
;
1586 /* check that last 100 bytes are still = magic value */
1587 for (i
= 0; i
< 100; i
++) {
1588 GLuint pos
= bufObj
->Size
- i
- 1;
1589 if (buf
[pos
] != 123) {
1590 _mesa_warning(ctx
, "Out of bounds buffer object write detected"
1591 " at position %d (value = %u)\n",
1599 if (bufObj
->AccessFlags
& GL_MAP_WRITE_BIT
) {
1600 GLuint i
, unchanged
= 0;
1601 GLubyte
*b
= (GLubyte
*) bufObj
->Pointer
;
1603 /* check which bytes changed */
1604 for (i
= 0; i
< bufObj
->Size
- 1; i
++) {
1605 if (b
[i
] == (i
& 0xff) && b
[i
+1] == ((i
+1) & 0xff)) {
1612 printf("glUnmapBufferARB(%u): %u of %ld unchanged, starting at %d\n",
1613 bufObj
->Name
, unchanged
, bufObj
->Size
, pos
);
1618 status
= ctx
->Driver
.UnmapBuffer( ctx
, bufObj
);
1619 bufObj
->AccessFlags
= 0;
1620 ASSERT(bufObj
->Pointer
== NULL
);
1621 ASSERT(bufObj
->Offset
== 0);
1622 ASSERT(bufObj
->Length
== 0);
1629 _mesa_GetBufferParameteriv(GLenum target
, GLenum pname
, GLint
*params
)
1631 GET_CURRENT_CONTEXT(ctx
);
1632 struct gl_buffer_object
*bufObj
;
1634 bufObj
= get_buffer(ctx
, "glGetBufferParameterivARB", target
,
1635 GL_INVALID_OPERATION
);
1640 case GL_BUFFER_SIZE_ARB
:
1641 *params
= (GLint
) bufObj
->Size
;
1643 case GL_BUFFER_USAGE_ARB
:
1644 *params
= bufObj
->Usage
;
1646 case GL_BUFFER_ACCESS_ARB
:
1647 *params
= simplified_access_mode(ctx
, bufObj
->AccessFlags
);
1649 case GL_BUFFER_MAPPED_ARB
:
1650 *params
= _mesa_bufferobj_mapped(bufObj
);
1652 case GL_BUFFER_ACCESS_FLAGS
:
1653 if (!ctx
->Extensions
.ARB_map_buffer_range
)
1655 *params
= bufObj
->AccessFlags
;
1657 case GL_BUFFER_MAP_OFFSET
:
1658 if (!ctx
->Extensions
.ARB_map_buffer_range
)
1660 *params
= (GLint
) bufObj
->Offset
;
1662 case GL_BUFFER_MAP_LENGTH
:
1663 if (!ctx
->Extensions
.ARB_map_buffer_range
)
1665 *params
= (GLint
) bufObj
->Length
;
1668 ; /* fall-through */
1672 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetBufferParameterivARB(pname=%s)",
1673 _mesa_lookup_enum_by_nr(pname
));
1679 * This is pretty much a duplicate of GetBufferParameteriv() but the
1680 * GL_BUFFER_SIZE_ARB attribute will be 64-bits on a 64-bit system.
1683 _mesa_GetBufferParameteri64v(GLenum target
, GLenum pname
, GLint64
*params
)
1685 GET_CURRENT_CONTEXT(ctx
);
1686 struct gl_buffer_object
*bufObj
;
1688 bufObj
= get_buffer(ctx
, "glGetBufferParameteri64v", target
,
1689 GL_INVALID_OPERATION
);
1694 case GL_BUFFER_SIZE_ARB
:
1695 *params
= bufObj
->Size
;
1697 case GL_BUFFER_USAGE_ARB
:
1698 *params
= bufObj
->Usage
;
1700 case GL_BUFFER_ACCESS_ARB
:
1701 *params
= simplified_access_mode(ctx
, bufObj
->AccessFlags
);
1703 case GL_BUFFER_ACCESS_FLAGS
:
1704 if (!ctx
->Extensions
.ARB_map_buffer_range
)
1706 *params
= bufObj
->AccessFlags
;
1708 case GL_BUFFER_MAPPED_ARB
:
1709 *params
= _mesa_bufferobj_mapped(bufObj
);
1711 case GL_BUFFER_MAP_OFFSET
:
1712 if (!ctx
->Extensions
.ARB_map_buffer_range
)
1714 *params
= bufObj
->Offset
;
1716 case GL_BUFFER_MAP_LENGTH
:
1717 if (!ctx
->Extensions
.ARB_map_buffer_range
)
1719 *params
= bufObj
->Length
;
1722 ; /* fall-through */
1726 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetBufferParameteri64v(pname=%s)",
1727 _mesa_lookup_enum_by_nr(pname
));
1732 _mesa_GetBufferPointerv(GLenum target
, GLenum pname
, GLvoid
**params
)
1734 GET_CURRENT_CONTEXT(ctx
);
1735 struct gl_buffer_object
* bufObj
;
1737 if (pname
!= GL_BUFFER_MAP_POINTER_ARB
) {
1738 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetBufferPointervARB(pname)");
1742 bufObj
= get_buffer(ctx
, "glGetBufferPointervARB", target
,
1743 GL_INVALID_OPERATION
);
1747 *params
= bufObj
->Pointer
;
1752 _mesa_CopyBufferSubData(GLenum readTarget
, GLenum writeTarget
,
1753 GLintptr readOffset
, GLintptr writeOffset
,
1756 GET_CURRENT_CONTEXT(ctx
);
1757 struct gl_buffer_object
*src
, *dst
;
1759 src
= get_buffer(ctx
, "glCopyBufferSubData", readTarget
,
1760 GL_INVALID_OPERATION
);
1764 dst
= get_buffer(ctx
, "glCopyBufferSubData", writeTarget
,
1765 GL_INVALID_OPERATION
);
1769 if (_mesa_bufferobj_mapped(src
)) {
1770 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1771 "glCopyBufferSubData(readBuffer is mapped)");
1775 if (_mesa_bufferobj_mapped(dst
)) {
1776 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1777 "glCopyBufferSubData(writeBuffer is mapped)");
1781 if (readOffset
< 0) {
1782 _mesa_error(ctx
, GL_INVALID_VALUE
,
1783 "glCopyBufferSubData(readOffset = %d)", (int) readOffset
);
1787 if (writeOffset
< 0) {
1788 _mesa_error(ctx
, GL_INVALID_VALUE
,
1789 "glCopyBufferSubData(writeOffset = %d)", (int) writeOffset
);
1794 _mesa_error(ctx
, GL_INVALID_VALUE
,
1795 "glCopyBufferSubData(writeOffset = %d)", (int) size
);
1799 if (readOffset
+ size
> src
->Size
) {
1800 _mesa_error(ctx
, GL_INVALID_VALUE
,
1801 "glCopyBufferSubData(readOffset + size = %d)",
1802 (int) (readOffset
+ size
));
1806 if (writeOffset
+ size
> dst
->Size
) {
1807 _mesa_error(ctx
, GL_INVALID_VALUE
,
1808 "glCopyBufferSubData(writeOffset + size = %d)",
1809 (int) (writeOffset
+ size
));
1814 if (readOffset
+ size
<= writeOffset
) {
1817 else if (writeOffset
+ size
<= readOffset
) {
1821 /* overlapping src/dst is illegal */
1822 _mesa_error(ctx
, GL_INVALID_VALUE
,
1823 "glCopyBufferSubData(overlapping src/dst)");
1828 ctx
->Driver
.CopyBufferSubData(ctx
, src
, dst
, readOffset
, writeOffset
, size
);
1833 * See GL_ARB_map_buffer_range spec
1836 _mesa_MapBufferRange(GLenum target
, GLintptr offset
, GLsizeiptr length
,
1839 GET_CURRENT_CONTEXT(ctx
);
1840 struct gl_buffer_object
*bufObj
;
1843 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, NULL
);
1845 if (!ctx
->Extensions
.ARB_map_buffer_range
) {
1846 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1847 "glMapBufferRange(extension not supported)");
1852 _mesa_error(ctx
, GL_INVALID_VALUE
,
1853 "glMapBufferRange(offset = %ld)", (long)offset
);
1858 _mesa_error(ctx
, GL_INVALID_VALUE
,
1859 "glMapBufferRange(length = %ld)", (long)length
);
1863 /* Page 38 of the PDF of the OpenGL ES 3.0 spec says:
1865 * "An INVALID_OPERATION error is generated for any of the following
1868 * * <length> is zero."
1870 if (_mesa_is_gles(ctx
) && length
== 0) {
1871 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1872 "glMapBufferRange(length = 0)");
1876 if (access
& ~(GL_MAP_READ_BIT
|
1878 GL_MAP_INVALIDATE_RANGE_BIT
|
1879 GL_MAP_INVALIDATE_BUFFER_BIT
|
1880 GL_MAP_FLUSH_EXPLICIT_BIT
|
1881 GL_MAP_UNSYNCHRONIZED_BIT
)) {
1882 /* generate an error if any undefind bit is set */
1883 _mesa_error(ctx
, GL_INVALID_VALUE
, "glMapBufferRange(access)");
1887 if ((access
& (GL_MAP_READ_BIT
| GL_MAP_WRITE_BIT
)) == 0) {
1888 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1889 "glMapBufferRange(access indicates neither read or write)");
1893 if ((access
& GL_MAP_READ_BIT
) &&
1894 (access
& (GL_MAP_INVALIDATE_RANGE_BIT
|
1895 GL_MAP_INVALIDATE_BUFFER_BIT
|
1896 GL_MAP_UNSYNCHRONIZED_BIT
))) {
1897 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1898 "glMapBufferRange(invalid access flags)");
1902 if ((access
& GL_MAP_FLUSH_EXPLICIT_BIT
) &&
1903 ((access
& GL_MAP_WRITE_BIT
) == 0)) {
1904 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1905 "glMapBufferRange(invalid access flags)");
1909 bufObj
= get_buffer(ctx
, "glMapBufferRange", target
, GL_INVALID_OPERATION
);
1913 if (offset
+ length
> bufObj
->Size
) {
1914 _mesa_error(ctx
, GL_INVALID_VALUE
,
1915 "glMapBufferRange(offset + length > size)");
1919 if (_mesa_bufferobj_mapped(bufObj
)) {
1920 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1921 "glMapBufferRange(buffer already mapped)");
1925 if (!bufObj
->Size
) {
1926 _mesa_error(ctx
, GL_OUT_OF_MEMORY
,
1927 "glMapBufferRange(buffer size = 0)");
1931 /* Mapping zero bytes should return a non-null pointer. */
1933 static long dummy
= 0;
1934 bufObj
->Pointer
= &dummy
;
1935 bufObj
->Length
= length
;
1936 bufObj
->Offset
= offset
;
1937 bufObj
->AccessFlags
= access
;
1938 return bufObj
->Pointer
;
1941 ASSERT(ctx
->Driver
.MapBufferRange
);
1942 map
= ctx
->Driver
.MapBufferRange(ctx
, offset
, length
, access
, bufObj
);
1944 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glMapBufferARB(map failed)");
1947 /* The driver callback should have set all these fields.
1948 * This is important because other modules (like VBO) might call
1949 * the driver function directly.
1951 ASSERT(bufObj
->Pointer
== map
);
1952 ASSERT(bufObj
->Length
== length
);
1953 ASSERT(bufObj
->Offset
== offset
);
1954 ASSERT(bufObj
->AccessFlags
== access
);
1962 * See GL_ARB_map_buffer_range spec
1965 _mesa_FlushMappedBufferRange(GLenum target
, GLintptr offset
, GLsizeiptr length
)
1967 GET_CURRENT_CONTEXT(ctx
);
1968 struct gl_buffer_object
*bufObj
;
1970 if (!ctx
->Extensions
.ARB_map_buffer_range
) {
1971 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1972 "glFlushMappedBufferRange(extension not supported)");
1977 _mesa_error(ctx
, GL_INVALID_VALUE
,
1978 "glFlushMappedBufferRange(offset = %ld)", (long)offset
);
1983 _mesa_error(ctx
, GL_INVALID_VALUE
,
1984 "glFlushMappedBufferRange(length = %ld)", (long)length
);
1988 bufObj
= get_buffer(ctx
, "glFlushMappedBufferRange", target
,
1989 GL_INVALID_OPERATION
);
1993 if (!_mesa_bufferobj_mapped(bufObj
)) {
1994 /* buffer is not mapped */
1995 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1996 "glFlushMappedBufferRange(buffer is not mapped)");
2000 if ((bufObj
->AccessFlags
& GL_MAP_FLUSH_EXPLICIT_BIT
) == 0) {
2001 _mesa_error(ctx
, GL_INVALID_OPERATION
,
2002 "glFlushMappedBufferRange(GL_MAP_FLUSH_EXPLICIT_BIT not set)");
2006 if (offset
+ length
> bufObj
->Length
) {
2007 _mesa_error(ctx
, GL_INVALID_VALUE
,
2008 "glFlushMappedBufferRange(offset %ld + length %ld > mapped length %ld)",
2009 (long)offset
, (long)length
, (long)bufObj
->Length
);
2013 ASSERT(bufObj
->AccessFlags
& GL_MAP_WRITE_BIT
);
2015 if (ctx
->Driver
.FlushMappedBufferRange
)
2016 ctx
->Driver
.FlushMappedBufferRange(ctx
, offset
, length
, bufObj
);
2021 buffer_object_purgeable(struct gl_context
*ctx
, GLuint name
, GLenum option
)
2023 struct gl_buffer_object
*bufObj
;
2026 bufObj
= _mesa_lookup_bufferobj(ctx
, name
);
2028 _mesa_error(ctx
, GL_INVALID_VALUE
,
2029 "glObjectPurgeable(name = 0x%x)", name
);
2032 if (!_mesa_is_bufferobj(bufObj
)) {
2033 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glObjectPurgeable(buffer 0)" );
2037 if (bufObj
->Purgeable
) {
2038 _mesa_error(ctx
, GL_INVALID_OPERATION
,
2039 "glObjectPurgeable(name = 0x%x) is already purgeable", name
);
2040 return GL_VOLATILE_APPLE
;
2043 bufObj
->Purgeable
= GL_TRUE
;
2045 retval
= GL_VOLATILE_APPLE
;
2046 if (ctx
->Driver
.BufferObjectPurgeable
)
2047 retval
= ctx
->Driver
.BufferObjectPurgeable(ctx
, bufObj
, option
);
2054 renderbuffer_purgeable(struct gl_context
*ctx
, GLuint name
, GLenum option
)
2056 struct gl_renderbuffer
*bufObj
;
2059 bufObj
= _mesa_lookup_renderbuffer(ctx
, name
);
2061 _mesa_error(ctx
, GL_INVALID_VALUE
,
2062 "glObjectUnpurgeable(name = 0x%x)", name
);
2066 if (bufObj
->Purgeable
) {
2067 _mesa_error(ctx
, GL_INVALID_OPERATION
,
2068 "glObjectPurgeable(name = 0x%x) is already purgeable", name
);
2069 return GL_VOLATILE_APPLE
;
2072 bufObj
->Purgeable
= GL_TRUE
;
2074 retval
= GL_VOLATILE_APPLE
;
2075 if (ctx
->Driver
.RenderObjectPurgeable
)
2076 retval
= ctx
->Driver
.RenderObjectPurgeable(ctx
, bufObj
, option
);
2083 texture_object_purgeable(struct gl_context
*ctx
, GLuint name
, GLenum option
)
2085 struct gl_texture_object
*bufObj
;
2088 bufObj
= _mesa_lookup_texture(ctx
, name
);
2090 _mesa_error(ctx
, GL_INVALID_VALUE
,
2091 "glObjectPurgeable(name = 0x%x)", name
);
2095 if (bufObj
->Purgeable
) {
2096 _mesa_error(ctx
, GL_INVALID_OPERATION
,
2097 "glObjectPurgeable(name = 0x%x) is already purgeable", name
);
2098 return GL_VOLATILE_APPLE
;
2101 bufObj
->Purgeable
= GL_TRUE
;
2103 retval
= GL_VOLATILE_APPLE
;
2104 if (ctx
->Driver
.TextureObjectPurgeable
)
2105 retval
= ctx
->Driver
.TextureObjectPurgeable(ctx
, bufObj
, option
);
2112 _mesa_ObjectPurgeableAPPLE(GLenum objectType
, GLuint name
, GLenum option
)
2116 GET_CURRENT_CONTEXT(ctx
);
2117 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, 0);
2120 _mesa_error(ctx
, GL_INVALID_VALUE
,
2121 "glObjectPurgeable(name = 0x%x)", name
);
2126 case GL_VOLATILE_APPLE
:
2127 case GL_RELEASED_APPLE
:
2131 _mesa_error(ctx
, GL_INVALID_ENUM
,
2132 "glObjectPurgeable(name = 0x%x) invalid option: %d",
2137 switch (objectType
) {
2139 retval
= texture_object_purgeable(ctx
, name
, option
);
2141 case GL_RENDERBUFFER_EXT
:
2142 retval
= renderbuffer_purgeable(ctx
, name
, option
);
2144 case GL_BUFFER_OBJECT_APPLE
:
2145 retval
= buffer_object_purgeable(ctx
, name
, option
);
2148 _mesa_error(ctx
, GL_INVALID_ENUM
,
2149 "glObjectPurgeable(name = 0x%x) invalid type: %d",
2154 /* In strict conformance to the spec, we must only return VOLATILE when
2155 * when passed the VOLATILE option. Madness.
2157 * XXX First fix the spec, then fix me.
2159 return option
== GL_VOLATILE_APPLE
? GL_VOLATILE_APPLE
: retval
;
2164 buffer_object_unpurgeable(struct gl_context
*ctx
, GLuint name
, GLenum option
)
2166 struct gl_buffer_object
*bufObj
;
2169 bufObj
= _mesa_lookup_bufferobj(ctx
, name
);
2171 _mesa_error(ctx
, GL_INVALID_VALUE
,
2172 "glObjectUnpurgeable(name = 0x%x)", name
);
2176 if (! bufObj
->Purgeable
) {
2177 _mesa_error(ctx
, GL_INVALID_OPERATION
,
2178 "glObjectUnpurgeable(name = 0x%x) object is "
2179 " already \"unpurged\"", name
);
2183 bufObj
->Purgeable
= GL_FALSE
;
2186 if (ctx
->Driver
.BufferObjectUnpurgeable
)
2187 retval
= ctx
->Driver
.BufferObjectUnpurgeable(ctx
, bufObj
, option
);
2194 renderbuffer_unpurgeable(struct gl_context
*ctx
, GLuint name
, GLenum option
)
2196 struct gl_renderbuffer
*bufObj
;
2199 bufObj
= _mesa_lookup_renderbuffer(ctx
, name
);
2201 _mesa_error(ctx
, GL_INVALID_VALUE
,
2202 "glObjectUnpurgeable(name = 0x%x)", name
);
2206 if (! bufObj
->Purgeable
) {
2207 _mesa_error(ctx
, GL_INVALID_OPERATION
,
2208 "glObjectUnpurgeable(name = 0x%x) object is "
2209 " already \"unpurged\"", name
);
2213 bufObj
->Purgeable
= GL_FALSE
;
2216 if (ctx
->Driver
.RenderObjectUnpurgeable
)
2217 retval
= ctx
->Driver
.RenderObjectUnpurgeable(ctx
, bufObj
, option
);
2224 texture_object_unpurgeable(struct gl_context
*ctx
, GLuint name
, GLenum option
)
2226 struct gl_texture_object
*bufObj
;
2229 bufObj
= _mesa_lookup_texture(ctx
, name
);
2231 _mesa_error(ctx
, GL_INVALID_VALUE
,
2232 "glObjectUnpurgeable(name = 0x%x)", name
);
2236 if (! bufObj
->Purgeable
) {
2237 _mesa_error(ctx
, GL_INVALID_OPERATION
,
2238 "glObjectUnpurgeable(name = 0x%x) object is"
2239 " already \"unpurged\"", name
);
2243 bufObj
->Purgeable
= GL_FALSE
;
2246 if (ctx
->Driver
.TextureObjectUnpurgeable
)
2247 retval
= ctx
->Driver
.TextureObjectUnpurgeable(ctx
, bufObj
, option
);
2254 _mesa_ObjectUnpurgeableAPPLE(GLenum objectType
, GLuint name
, GLenum option
)
2256 GET_CURRENT_CONTEXT(ctx
);
2257 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, 0);
2260 _mesa_error(ctx
, GL_INVALID_VALUE
,
2261 "glObjectUnpurgeable(name = 0x%x)", name
);
2266 case GL_RETAINED_APPLE
:
2267 case GL_UNDEFINED_APPLE
:
2271 _mesa_error(ctx
, GL_INVALID_ENUM
,
2272 "glObjectUnpurgeable(name = 0x%x) invalid option: %d",
2277 switch (objectType
) {
2278 case GL_BUFFER_OBJECT_APPLE
:
2279 return buffer_object_unpurgeable(ctx
, name
, option
);
2281 return texture_object_unpurgeable(ctx
, name
, option
);
2282 case GL_RENDERBUFFER_EXT
:
2283 return renderbuffer_unpurgeable(ctx
, name
, option
);
2285 _mesa_error(ctx
, GL_INVALID_ENUM
,
2286 "glObjectUnpurgeable(name = 0x%x) invalid type: %d",
2294 get_buffer_object_parameteriv(struct gl_context
*ctx
, GLuint name
,
2295 GLenum pname
, GLint
*params
)
2297 struct gl_buffer_object
*bufObj
= _mesa_lookup_bufferobj(ctx
, name
);
2299 _mesa_error(ctx
, GL_INVALID_VALUE
,
2300 "glGetObjectParameteriv(name = 0x%x) invalid object", name
);
2305 case GL_PURGEABLE_APPLE
:
2306 *params
= bufObj
->Purgeable
;
2309 _mesa_error(ctx
, GL_INVALID_ENUM
,
2310 "glGetObjectParameteriv(name = 0x%x) invalid enum: %d",
2318 get_renderbuffer_parameteriv(struct gl_context
*ctx
, GLuint name
,
2319 GLenum pname
, GLint
*params
)
2321 struct gl_renderbuffer
*rb
= _mesa_lookup_renderbuffer(ctx
, name
);
2323 _mesa_error(ctx
, GL_INVALID_VALUE
,
2324 "glObjectUnpurgeable(name = 0x%x)", name
);
2329 case GL_PURGEABLE_APPLE
:
2330 *params
= rb
->Purgeable
;
2333 _mesa_error(ctx
, GL_INVALID_ENUM
,
2334 "glGetObjectParameteriv(name = 0x%x) invalid enum: %d",
2342 get_texture_object_parameteriv(struct gl_context
*ctx
, GLuint name
,
2343 GLenum pname
, GLint
*params
)
2345 struct gl_texture_object
*texObj
= _mesa_lookup_texture(ctx
, name
);
2347 _mesa_error(ctx
, GL_INVALID_VALUE
,
2348 "glObjectUnpurgeable(name = 0x%x)", name
);
2353 case GL_PURGEABLE_APPLE
:
2354 *params
= texObj
->Purgeable
;
2357 _mesa_error(ctx
, GL_INVALID_ENUM
,
2358 "glGetObjectParameteriv(name = 0x%x) invalid enum: %d",
2366 _mesa_GetObjectParameterivAPPLE(GLenum objectType
, GLuint name
, GLenum pname
,
2369 GET_CURRENT_CONTEXT(ctx
);
2372 _mesa_error(ctx
, GL_INVALID_VALUE
,
2373 "glGetObjectParameteriv(name = 0x%x)", name
);
2377 switch (objectType
) {
2379 get_texture_object_parameteriv(ctx
, name
, pname
, params
);
2381 case GL_BUFFER_OBJECT_APPLE
:
2382 get_buffer_object_parameteriv(ctx
, name
, pname
, params
);
2384 case GL_RENDERBUFFER_EXT
:
2385 get_renderbuffer_parameteriv(ctx
, name
, pname
, params
);
2388 _mesa_error(ctx
, GL_INVALID_ENUM
,
2389 "glGetObjectParameteriv(name = 0x%x) invalid type: %d",
2395 set_ubo_binding(struct gl_context
*ctx
,
2397 struct gl_buffer_object
*bufObj
,
2402 struct gl_uniform_buffer_binding
*binding
;
2404 binding
= &ctx
->UniformBufferBindings
[index
];
2405 if (binding
->BufferObject
== bufObj
&&
2406 binding
->Offset
== offset
&&
2407 binding
->Size
== size
&&
2408 binding
->AutomaticSize
== autoSize
) {
2412 FLUSH_VERTICES(ctx
, 0);
2413 ctx
->NewDriverState
|= ctx
->DriverFlags
.NewUniformBuffer
;
2415 _mesa_reference_buffer_object(ctx
, &binding
->BufferObject
, bufObj
);
2416 binding
->Offset
= offset
;
2417 binding
->Size
= size
;
2418 binding
->AutomaticSize
= autoSize
;
2422 * Bind a region of a buffer object to a uniform block binding point.
2423 * \param index the uniform buffer binding point index
2424 * \param bufObj the buffer object
2425 * \param offset offset to the start of buffer object region
2426 * \param size size of the buffer object region
2429 bind_buffer_range_uniform_buffer(struct gl_context
*ctx
,
2431 struct gl_buffer_object
*bufObj
,
2435 if (index
>= ctx
->Const
.MaxUniformBufferBindings
) {
2436 _mesa_error(ctx
, GL_INVALID_VALUE
, "glBindBufferRange(index=%d)", index
);
2440 if (offset
& (ctx
->Const
.UniformBufferOffsetAlignment
- 1)) {
2441 _mesa_error(ctx
, GL_INVALID_VALUE
,
2442 "glBindBufferRange(offset misalgned %d/%d)", (int) offset
,
2443 ctx
->Const
.UniformBufferOffsetAlignment
);
2447 if (bufObj
== ctx
->Shared
->NullBufferObj
) {
2452 _mesa_reference_buffer_object(ctx
, &ctx
->UniformBuffer
, bufObj
);
2453 set_ubo_binding(ctx
, index
, bufObj
, offset
, size
, GL_FALSE
);
2458 * Bind a buffer object to a uniform block binding point.
2459 * As above, but offset = 0.
2462 bind_buffer_base_uniform_buffer(struct gl_context
*ctx
,
2464 struct gl_buffer_object
*bufObj
)
2466 if (index
>= ctx
->Const
.MaxUniformBufferBindings
) {
2467 _mesa_error(ctx
, GL_INVALID_VALUE
, "glBindBufferBase(index=%d)", index
);
2471 _mesa_reference_buffer_object(ctx
, &ctx
->UniformBuffer
, bufObj
);
2472 if (bufObj
== ctx
->Shared
->NullBufferObj
)
2473 set_ubo_binding(ctx
, index
, bufObj
, -1, -1, GL_TRUE
);
2475 set_ubo_binding(ctx
, index
, bufObj
, 0, 0, GL_TRUE
);
2479 set_atomic_buffer_binding(struct gl_context
*ctx
,
2481 struct gl_buffer_object
*bufObj
,
2486 struct gl_atomic_buffer_binding
*binding
;
2488 if (index
>= ctx
->Const
.MaxAtomicBufferBindings
) {
2489 _mesa_error(ctx
, GL_INVALID_VALUE
, "%s(index=%d)", name
, index
);
2493 if (offset
& (ATOMIC_COUNTER_SIZE
- 1)) {
2494 _mesa_error(ctx
, GL_INVALID_VALUE
,
2495 "%s(offset misalgned %d/%d)", name
, (int) offset
,
2496 ATOMIC_COUNTER_SIZE
);
2500 _mesa_reference_buffer_object(ctx
, &ctx
->AtomicBuffer
, bufObj
);
2502 binding
= &ctx
->AtomicBufferBindings
[index
];
2503 if (binding
->BufferObject
== bufObj
&&
2504 binding
->Offset
== offset
&&
2505 binding
->Size
== size
) {
2509 FLUSH_VERTICES(ctx
, 0);
2510 ctx
->NewDriverState
|= ctx
->DriverFlags
.NewAtomicBuffer
;
2512 _mesa_reference_buffer_object(ctx
, &binding
->BufferObject
, bufObj
);
2514 if (bufObj
== ctx
->Shared
->NullBufferObj
) {
2515 binding
->Offset
= -1;
2518 binding
->Offset
= offset
;
2519 binding
->Size
= size
;
2524 _mesa_BindBufferRange(GLenum target
, GLuint index
,
2525 GLuint buffer
, GLintptr offset
, GLsizeiptr size
)
2527 GET_CURRENT_CONTEXT(ctx
);
2528 struct gl_buffer_object
*bufObj
;
2531 bufObj
= ctx
->Shared
->NullBufferObj
;
2533 bufObj
= _mesa_lookup_bufferobj(ctx
, buffer
);
2535 if (!_mesa_handle_bind_buffer_gen(ctx
, target
, buffer
,
2536 &bufObj
, "glBindBufferRange"))
2540 _mesa_error(ctx
, GL_INVALID_OPERATION
,
2541 "glBindBufferRange(invalid buffer=%u)", buffer
);
2547 _mesa_error(ctx
, GL_INVALID_VALUE
, "glBindBufferRange(size=%d)",
2554 case GL_TRANSFORM_FEEDBACK_BUFFER
:
2555 _mesa_bind_buffer_range_transform_feedback(ctx
, index
, bufObj
,
2558 case GL_UNIFORM_BUFFER
:
2559 bind_buffer_range_uniform_buffer(ctx
, index
, bufObj
, offset
, size
);
2561 case GL_ATOMIC_COUNTER_BUFFER
:
2562 set_atomic_buffer_binding(ctx
, index
, bufObj
, offset
, size
,
2563 "glBindBufferRange");
2566 _mesa_error(ctx
, GL_INVALID_ENUM
, "glBindBufferRange(target)");
2572 _mesa_BindBufferBase(GLenum target
, GLuint index
, GLuint buffer
)
2574 GET_CURRENT_CONTEXT(ctx
);
2575 struct gl_buffer_object
*bufObj
;
2578 bufObj
= ctx
->Shared
->NullBufferObj
;
2580 bufObj
= _mesa_lookup_bufferobj(ctx
, buffer
);
2582 if (!_mesa_handle_bind_buffer_gen(ctx
, target
, buffer
,
2583 &bufObj
, "glBindBufferBase"))
2587 _mesa_error(ctx
, GL_INVALID_OPERATION
,
2588 "glBindBufferBase(invalid buffer=%u)", buffer
);
2592 /* Note that there's some oddness in the GL 3.1-GL 3.3 specifications with
2593 * regards to BindBufferBase. It says (GL 3.1 core spec, page 63):
2595 * "BindBufferBase is equivalent to calling BindBufferRange with offset
2596 * zero and size equal to the size of buffer."
2598 * but it says for glGetIntegeri_v (GL 3.1 core spec, page 230):
2600 * "If the parameter (starting offset or size) was not specified when the
2601 * buffer object was bound, zero is returned."
2603 * What happens if the size of the buffer changes? Does the size of the
2604 * buffer at the moment glBindBufferBase was called still play a role, like
2605 * the first quote would imply, or is the size meaningless in the
2606 * glBindBufferBase case like the second quote would suggest? The GL 4.1
2607 * core spec page 45 says:
2609 * "It is equivalent to calling BindBufferRange with offset zero, while
2610 * size is determined by the size of the bound buffer at the time the
2613 * My interpretation is that the GL 4.1 spec was a clarification of the
2614 * behavior, not a change. In particular, this choice will only make
2615 * rendering work in cases where it would have had undefined results.
2619 case GL_TRANSFORM_FEEDBACK_BUFFER
:
2620 _mesa_bind_buffer_base_transform_feedback(ctx
, index
, bufObj
);
2622 case GL_UNIFORM_BUFFER
:
2623 bind_buffer_base_uniform_buffer(ctx
, index
, bufObj
);
2625 case GL_ATOMIC_COUNTER_BUFFER
:
2626 set_atomic_buffer_binding(ctx
, index
, bufObj
, 0, 0,
2627 "glBindBufferBase");
2630 _mesa_error(ctx
, GL_INVALID_ENUM
, "glBindBufferBase(target)");
2636 _mesa_InvalidateBufferSubData(GLuint buffer
, GLintptr offset
,
2639 GET_CURRENT_CONTEXT(ctx
);
2640 struct gl_buffer_object
*bufObj
;
2641 const GLintptr end
= offset
+ length
;
2643 bufObj
= _mesa_lookup_bufferobj(ctx
, buffer
);
2645 _mesa_error(ctx
, GL_INVALID_VALUE
,
2646 "glInvalidateBufferSubData(name = 0x%x) invalid object",
2651 /* The GL_ARB_invalidate_subdata spec says:
2653 * "An INVALID_VALUE error is generated if <offset> or <length> is
2654 * negative, or if <offset> + <length> is greater than the value of
2657 if (end
< 0 || end
> bufObj
->Size
) {
2658 _mesa_error(ctx
, GL_INVALID_VALUE
,
2659 "glInvalidateBufferSubData(invalid offset or length)");
2663 /* The GL_ARB_invalidate_subdata spec says:
2665 * "An INVALID_OPERATION error is generated if the buffer is currently
2666 * mapped by MapBuffer, or if the invalidate range intersects the range
2667 * currently mapped by MapBufferRange."
2669 if (bufferobj_range_mapped(bufObj
, offset
, length
)) {
2670 _mesa_error(ctx
, GL_INVALID_OPERATION
,
2671 "glInvalidateBufferSubData(intersection with mapped "
2676 /* We don't actually do anything for this yet. Just return after
2677 * validating the parameters and generating the required errors.
2683 _mesa_InvalidateBufferData(GLuint buffer
)
2685 GET_CURRENT_CONTEXT(ctx
);
2686 struct gl_buffer_object
*bufObj
;
2688 bufObj
= _mesa_lookup_bufferobj(ctx
, buffer
);
2690 _mesa_error(ctx
, GL_INVALID_VALUE
,
2691 "glInvalidateBufferData(name = 0x%x) invalid object",
2696 /* The GL_ARB_invalidate_subdata spec says:
2698 * "An INVALID_OPERATION error is generated if the buffer is currently
2699 * mapped by MapBuffer, or if the invalidate range intersects the range
2700 * currently mapped by MapBufferRange."
2702 if (_mesa_bufferobj_mapped(bufObj
)) {
2703 _mesa_error(ctx
, GL_INVALID_OPERATION
,
2704 "glInvalidateBufferData(intersection with mapped "
2709 /* We don't actually do anything for this yet. Just return after
2710 * validating the parameters and generating the required errors.