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(GLcontext
*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(GLcontext
*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(GLcontext
*ctx
,
99 const GLvoid
* data
, struct gl_buffer_object
*obj
)
101 struct st_buffer_object
*st_obj
= st_buffer_object(obj
);
103 /* we may be called from VBO code, so double-check params here */
106 ASSERT(offset
+ size
<= obj
->Size
);
112 * According to ARB_vertex_buffer_object specification, if data is null,
113 * then the contents of the buffer object's data store is undefined. We just
114 * ignore, and leave it unchanged.
119 /* Now that transfers are per-context, we don't have to figure out
120 * flushing here. Usually drivers won't need to flush in this case
121 * even if the buffer is currently referenced by hardware - they
122 * just queue the upload as dma rather than mapping the underlying
125 pipe_buffer_write(st_context(ctx
)->pipe
,
132 * Called via glGetBufferSubDataARB().
135 st_bufferobj_get_subdata(GLcontext
*ctx
,
139 GLvoid
* data
, struct gl_buffer_object
*obj
)
141 struct st_buffer_object
*st_obj
= st_buffer_object(obj
);
143 /* we may be called from VBO code, so double-check params here */
146 ASSERT(offset
+ size
<= obj
->Size
);
151 pipe_buffer_read(st_context(ctx
)->pipe
, st_obj
->buffer
,
157 * Allocate space for and store data in a buffer object. Any data that was
158 * previously stored in the buffer object is lost. If data is NULL,
159 * memory will be allocated, but no copy will occur.
160 * Called via ctx->Driver.BufferData().
161 * \return GL_TRUE for success, GL_FALSE if out of memory
164 st_bufferobj_data(GLcontext
*ctx
,
169 struct gl_buffer_object
*obj
)
171 struct st_context
*st
= st_context(ctx
);
172 struct pipe_context
*pipe
= st
->pipe
;
173 struct st_buffer_object
*st_obj
= st_buffer_object(obj
);
174 unsigned buffer_usage
;
176 st_obj
->Base
.Size
= size
;
177 st_obj
->Base
.Usage
= usage
;
180 case GL_PIXEL_PACK_BUFFER_ARB
:
181 case GL_PIXEL_UNPACK_BUFFER_ARB
:
182 buffer_usage
= PIPE_BIND_RENDER_TARGET
;
184 case GL_ARRAY_BUFFER_ARB
:
185 buffer_usage
= PIPE_BIND_VERTEX_BUFFER
;
187 case GL_ELEMENT_ARRAY_BUFFER_ARB
:
188 buffer_usage
= PIPE_BIND_INDEX_BUFFER
;
194 pipe_resource_reference( &st_obj
->buffer
, NULL
);
197 st_obj
->buffer
= pipe_buffer_create(pipe
->screen
, buffer_usage
, size
);
199 if (!st_obj
->buffer
) {
204 pipe_buffer_write(st_context(ctx
)->pipe
, st_obj
->buffer
, 0,
214 * Called via glMapBufferARB().
217 st_bufferobj_map(GLcontext
*ctx
, GLenum target
, GLenum access
,
218 struct gl_buffer_object
*obj
)
220 struct st_buffer_object
*st_obj
= st_buffer_object(obj
);
225 flags
= PIPE_TRANSFER_WRITE
;
228 flags
= PIPE_TRANSFER_READ
;
232 flags
= PIPE_TRANSFER_READ_WRITE
;
236 obj
->Pointer
= pipe_buffer_map(st_context(ctx
)->pipe
,
243 obj
->Length
= obj
->Size
;
250 * Dummy data whose's pointer is used for zero length ranges.
253 st_bufferobj_zero_length_range
= 0;
257 * Called via glMapBufferRange().
260 st_bufferobj_map_range(GLcontext
*ctx
, GLenum target
,
261 GLintptr offset
, GLsizeiptr length
, GLbitfield access
,
262 struct gl_buffer_object
*obj
)
264 struct pipe_context
*pipe
= st_context(ctx
)->pipe
;
265 struct st_buffer_object
*st_obj
= st_buffer_object(obj
);
266 enum pipe_transfer_usage flags
= 0x0;
268 if (access
& GL_MAP_WRITE_BIT
)
269 flags
|= PIPE_TRANSFER_WRITE
;
271 if (access
& GL_MAP_READ_BIT
)
272 flags
|= PIPE_TRANSFER_READ
;
274 if (access
& GL_MAP_FLUSH_EXPLICIT_BIT
)
275 flags
|= PIPE_TRANSFER_FLUSH_EXPLICIT
;
277 if (access
& GL_MAP_UNSYNCHRONIZED_BIT
)
278 flags
|= PIPE_TRANSFER_UNSYNCHRONIZED
;
280 /* ... other flags ...
283 if (access
& MESA_MAP_NOWAIT_BIT
)
284 flags
|= PIPE_TRANSFER_DONTBLOCK
;
288 assert(offset
< obj
->Size
);
289 assert(offset
+ length
<= obj
->Size
);
292 * We go out of way here to hide the degenerate yet valid case of zero
293 * length range from the pipe driver.
296 obj
->Pointer
= &st_bufferobj_zero_length_range
;
299 obj
->Pointer
= pipe_buffer_map_range(pipe
,
305 obj
->Pointer
= (ubyte
*) obj
->Pointer
+ offset
;
310 obj
->Offset
= offset
;
311 obj
->Length
= length
;
312 obj
->AccessFlags
= access
;
320 st_bufferobj_flush_mapped_range(GLcontext
*ctx
, GLenum target
,
321 GLintptr offset
, GLsizeiptr length
,
322 struct gl_buffer_object
*obj
)
324 struct pipe_context
*pipe
= st_context(ctx
)->pipe
;
325 struct st_buffer_object
*st_obj
= st_buffer_object(obj
);
327 /* Subrange is relative to mapped range */
330 assert(offset
+ length
<= obj
->Length
);
331 assert(obj
->Pointer
);
336 pipe_buffer_flush_mapped_range(pipe
, st_obj
->transfer
,
337 obj
->Offset
+ offset
, length
);
342 * Called via glUnmapBufferARB().
345 st_bufferobj_unmap(GLcontext
*ctx
, GLenum target
, struct gl_buffer_object
*obj
)
347 struct pipe_context
*pipe
= st_context(ctx
)->pipe
;
348 struct st_buffer_object
*st_obj
= st_buffer_object(obj
);
351 pipe_buffer_unmap(pipe
, st_obj
->buffer
, st_obj
->transfer
);
353 st_obj
->transfer
= NULL
;
362 * Called via glCopyBufferSubData().
365 st_copy_buffer_subdata(GLcontext
*ctx
,
366 struct gl_buffer_object
*src
,
367 struct gl_buffer_object
*dst
,
368 GLintptr readOffset
, GLintptr writeOffset
,
371 struct pipe_context
*pipe
= st_context(ctx
)->pipe
;
372 struct st_buffer_object
*srcObj
= st_buffer_object(src
);
373 struct st_buffer_object
*dstObj
= st_buffer_object(dst
);
374 struct pipe_transfer
*src_transfer
;
375 struct pipe_transfer
*dst_transfer
;
376 ubyte
*srcPtr
, *dstPtr
;
381 /* buffer should not already be mapped */
382 assert(!src
->Pointer
);
383 assert(!dst
->Pointer
);
385 srcPtr
= (ubyte
*) pipe_buffer_map_range(pipe
,
391 dstPtr
= (ubyte
*) pipe_buffer_map_range(pipe
,
397 if (srcPtr
&& dstPtr
)
398 memcpy(dstPtr
+ writeOffset
, srcPtr
+ readOffset
, size
);
400 pipe_buffer_unmap(pipe
, srcObj
->buffer
, src_transfer
);
401 pipe_buffer_unmap(pipe
, dstObj
->buffer
, dst_transfer
);
405 /* TODO: if buffer wasn't created with appropriate usage flags, need
406 * to recreate it now and copy contents -- or possibly create a
407 * gallium entrypoint to extend the usage flags and let the driver
408 * decide if a copy is necessary.
411 st_bufferobj_validate_usage(struct st_context
*st
,
412 struct st_buffer_object
*obj
,
419 st_init_bufferobject_functions(struct dd_function_table
*functions
)
421 functions
->NewBufferObject
= st_bufferobj_alloc
;
422 functions
->DeleteBuffer
= st_bufferobj_free
;
423 functions
->BufferData
= st_bufferobj_data
;
424 functions
->BufferSubData
= st_bufferobj_subdata
;
425 functions
->GetBufferSubData
= st_bufferobj_get_subdata
;
426 functions
->MapBuffer
= st_bufferobj_map
;
427 functions
->MapBufferRange
= st_bufferobj_map_range
;
428 functions
->FlushMappedBufferRange
= st_bufferobj_flush_mapped_range
;
429 functions
->UnmapBuffer
= st_bufferobj_unmap
;
430 functions
->CopyBufferSubData
= st_copy_buffer_subdata
;
432 /* For GL_APPLE_vertex_array_object */
433 functions
->NewArrayObject
= _mesa_new_array_object
;
434 functions
->DeleteArrayObject
= _mesa_delete_array_object
;