1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
30 * Functions for pixel buffer objects and vertex/element buffer objects.
34 #include "main/imports.h"
35 #include "main/mtypes.h"
36 #include "main/arrayobj.h"
37 #include "main/bufferobj.h"
39 #include "st_context.h"
40 #include "st_cb_bufferobjects.h"
42 #include "pipe/p_context.h"
43 #include "pipe/p_defines.h"
44 #include "util/u_inlines.h"
48 * There is some duplication between mesa's bufferobjects and our
49 * bufmgr buffers. Both have an integer handle and a hashtable to
50 * lookup an opaque structure. It would be nice if the handles and
51 * internal structure where somehow shared.
53 static struct gl_buffer_object
*
54 st_bufferobj_alloc(struct gl_context
*ctx
, GLuint name
, GLenum target
)
56 struct st_buffer_object
*st_obj
= ST_CALLOC_STRUCT(st_buffer_object
);
61 _mesa_initialize_buffer_object(&st_obj
->Base
, name
, target
);
69 * Deallocate/free a vertex/pixel buffer object.
70 * Called via glDeleteBuffersARB().
73 st_bufferobj_free(struct gl_context
*ctx
, struct gl_buffer_object
*obj
)
75 struct st_buffer_object
*st_obj
= st_buffer_object(obj
);
77 assert(obj
->RefCount
== 0);
78 assert(st_obj
->transfer
== NULL
);
81 pipe_resource_reference(&st_obj
->buffer
, NULL
);
89 * Replace data in a subrange of buffer object. If the data range
90 * specified by size + offset extends beyond the end of the buffer or
91 * if data is NULL, no copy is performed.
92 * Called via glBufferSubDataARB().
95 st_bufferobj_subdata(struct gl_context
*ctx
,
98 const GLvoid
* data
, struct gl_buffer_object
*obj
)
100 struct st_buffer_object
*st_obj
= st_buffer_object(obj
);
102 /* we may be called from VBO code, so double-check params here */
105 ASSERT(offset
+ size
<= obj
->Size
);
111 * According to ARB_vertex_buffer_object specification, if data is null,
112 * then the contents of the buffer object's data store is undefined. We just
113 * ignore, and leave it unchanged.
118 if (!st_obj
->buffer
) {
119 /* we probably ran out of memory during buffer allocation */
123 /* Now that transfers are per-context, we don't have to figure out
124 * flushing here. Usually drivers won't need to flush in this case
125 * even if the buffer is currently referenced by hardware - they
126 * just queue the upload as dma rather than mapping the underlying
129 pipe_buffer_write(st_context(ctx
)->pipe
,
136 * Called via glGetBufferSubDataARB().
139 st_bufferobj_get_subdata(struct gl_context
*ctx
,
142 GLvoid
* data
, struct gl_buffer_object
*obj
)
144 struct st_buffer_object
*st_obj
= st_buffer_object(obj
);
146 /* we may be called from VBO code, so double-check params here */
149 ASSERT(offset
+ size
<= obj
->Size
);
154 if (!st_obj
->buffer
) {
155 /* we probably ran out of memory during buffer allocation */
159 pipe_buffer_read(st_context(ctx
)->pipe
, st_obj
->buffer
,
165 * Allocate space for and store data in a buffer object. Any data that was
166 * previously stored in the buffer object is lost. If data is NULL,
167 * memory will be allocated, but no copy will occur.
168 * Called via ctx->Driver.BufferData().
169 * \return GL_TRUE for success, GL_FALSE if out of memory
172 st_bufferobj_data(struct gl_context
*ctx
,
177 struct gl_buffer_object
*obj
)
179 struct st_context
*st
= st_context(ctx
);
180 struct pipe_context
*pipe
= st
->pipe
;
181 struct st_buffer_object
*st_obj
= st_buffer_object(obj
);
182 unsigned bind
, pipe_usage
;
184 st_obj
->Base
.Size
= size
;
185 st_obj
->Base
.Usage
= usage
;
188 case GL_PIXEL_PACK_BUFFER_ARB
:
189 case GL_PIXEL_UNPACK_BUFFER_ARB
:
190 bind
= PIPE_BIND_RENDER_TARGET
| PIPE_BIND_SAMPLER_VIEW
;
192 case GL_ARRAY_BUFFER_ARB
:
193 bind
= PIPE_BIND_VERTEX_BUFFER
;
195 case GL_ELEMENT_ARRAY_BUFFER_ARB
:
196 bind
= PIPE_BIND_INDEX_BUFFER
;
206 pipe_usage
= PIPE_USAGE_STATIC
;
208 case GL_DYNAMIC_DRAW
:
209 case GL_DYNAMIC_READ
:
210 case GL_DYNAMIC_COPY
:
211 pipe_usage
= PIPE_USAGE_DYNAMIC
;
216 pipe_usage
= PIPE_USAGE_STREAM
;
219 pipe_usage
= PIPE_USAGE_DEFAULT
;
222 pipe_resource_reference( &st_obj
->buffer
, NULL
);
225 st_obj
->buffer
= pipe_buffer_create(pipe
->screen
, bind
,
228 if (!st_obj
->buffer
) {
230 st_obj
->Base
.Size
= 0;
235 pipe_buffer_write(pipe
, st_obj
->buffer
, 0, size
, data
);
244 * Called via glMapBufferRange().
247 st_bufferobj_map_range(struct gl_context
*ctx
,
248 GLintptr offset
, GLsizeiptr length
, GLbitfield access
,
249 struct gl_buffer_object
*obj
)
251 struct pipe_context
*pipe
= st_context(ctx
)->pipe
;
252 struct st_buffer_object
*st_obj
= st_buffer_object(obj
);
253 enum pipe_transfer_usage flags
= 0x0;
255 if (access
& GL_MAP_WRITE_BIT
)
256 flags
|= PIPE_TRANSFER_WRITE
;
258 if (access
& GL_MAP_READ_BIT
)
259 flags
|= PIPE_TRANSFER_READ
;
261 if (access
& GL_MAP_FLUSH_EXPLICIT_BIT
)
262 flags
|= PIPE_TRANSFER_FLUSH_EXPLICIT
;
264 if (access
& GL_MAP_INVALIDATE_BUFFER_BIT
) {
265 flags
|= PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE
;
267 else if (access
& GL_MAP_INVALIDATE_RANGE_BIT
) {
268 if (offset
== 0 && length
== obj
->Size
)
269 flags
|= PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE
;
271 flags
|= PIPE_TRANSFER_DISCARD_RANGE
;
274 if (access
& GL_MAP_UNSYNCHRONIZED_BIT
)
275 flags
|= PIPE_TRANSFER_UNSYNCHRONIZED
;
277 /* ... other flags ...
280 if (access
& MESA_MAP_NOWAIT_BIT
)
281 flags
|= PIPE_TRANSFER_DONTBLOCK
;
285 assert(offset
< obj
->Size
);
286 assert(offset
+ length
<= obj
->Size
);
288 obj
->Pointer
= pipe_buffer_map_range(pipe
,
294 obj
->Offset
= offset
;
295 obj
->Length
= length
;
296 obj
->AccessFlags
= access
;
304 st_bufferobj_flush_mapped_range(struct gl_context
*ctx
,
305 GLintptr offset
, GLsizeiptr length
,
306 struct gl_buffer_object
*obj
)
308 struct pipe_context
*pipe
= st_context(ctx
)->pipe
;
309 struct st_buffer_object
*st_obj
= st_buffer_object(obj
);
311 /* Subrange is relative to mapped range */
314 assert(offset
+ length
<= obj
->Length
);
315 assert(obj
->Pointer
);
320 pipe_buffer_flush_mapped_range(pipe
, st_obj
->transfer
,
321 obj
->Offset
+ offset
, length
);
326 * Called via glUnmapBufferARB().
329 st_bufferobj_unmap(struct gl_context
*ctx
, struct gl_buffer_object
*obj
)
331 struct pipe_context
*pipe
= st_context(ctx
)->pipe
;
332 struct st_buffer_object
*st_obj
= st_buffer_object(obj
);
335 pipe_buffer_unmap(pipe
, st_obj
->transfer
);
337 st_obj
->transfer
= NULL
;
346 * Called via glCopyBufferSubData().
349 st_copy_buffer_subdata(struct gl_context
*ctx
,
350 struct gl_buffer_object
*src
,
351 struct gl_buffer_object
*dst
,
352 GLintptr readOffset
, GLintptr writeOffset
,
355 struct pipe_context
*pipe
= st_context(ctx
)->pipe
;
356 struct st_buffer_object
*srcObj
= st_buffer_object(src
);
357 struct st_buffer_object
*dstObj
= st_buffer_object(dst
);
363 /* buffer should not already be mapped */
364 assert(!src
->Pointer
);
365 assert(!dst
->Pointer
);
367 u_box_1d(readOffset
, size
, &box
);
369 pipe
->resource_copy_region(pipe
, dstObj
->buffer
, 0, writeOffset
, 0, 0,
370 srcObj
->buffer
, 0, &box
);
374 /* TODO: if buffer wasn't created with appropriate usage flags, need
375 * to recreate it now and copy contents -- or possibly create a
376 * gallium entrypoint to extend the usage flags and let the driver
377 * decide if a copy is necessary.
380 st_bufferobj_validate_usage(struct st_context
*st
,
381 struct st_buffer_object
*obj
,
388 st_init_bufferobject_functions(struct dd_function_table
*functions
)
390 functions
->NewBufferObject
= st_bufferobj_alloc
;
391 functions
->DeleteBuffer
= st_bufferobj_free
;
392 functions
->BufferData
= st_bufferobj_data
;
393 functions
->BufferSubData
= st_bufferobj_subdata
;
394 functions
->GetBufferSubData
= st_bufferobj_get_subdata
;
395 functions
->MapBufferRange
= st_bufferobj_map_range
;
396 functions
->FlushMappedBufferRange
= st_bufferobj_flush_mapped_range
;
397 functions
->UnmapBuffer
= st_bufferobj_unmap
;
398 functions
->CopyBufferSubData
= st_copy_buffer_subdata
;
400 /* For GL_APPLE_vertex_array_object */
401 functions
->NewArrayObject
= _mesa_new_array_object
;
402 functions
->DeleteArrayObject
= _mesa_delete_array_object
;