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_inlines.h"
40 #include "st_context.h"
41 #include "st_cb_bufferobjects.h"
43 #include "pipe/p_context.h"
44 #include "pipe/p_defines.h"
45 #include "util/u_inlines.h"
49 * There is some duplication between mesa's bufferobjects and our
50 * bufmgr buffers. Both have an integer handle and a hashtable to
51 * lookup an opaque structure. It would be nice if the handles and
52 * internal structure where somehow shared.
54 static struct gl_buffer_object
*
55 st_bufferobj_alloc(GLcontext
*ctx
, GLuint name
, GLenum target
)
57 struct st_buffer_object
*st_obj
= ST_CALLOC_STRUCT(st_buffer_object
);
62 _mesa_initialize_buffer_object(&st_obj
->Base
, name
, target
);
70 * Deallocate/free a vertex/pixel buffer object.
71 * Called via glDeleteBuffersARB().
74 st_bufferobj_free(GLcontext
*ctx
, struct gl_buffer_object
*obj
)
76 struct st_buffer_object
*st_obj
= st_buffer_object(obj
);
78 assert(obj
->RefCount
== 0);
79 assert(st_obj
->transfer
== NULL
);
82 pipe_resource_reference(&st_obj
->buffer
, NULL
);
90 * Replace data in a subrange of buffer object. If the data range
91 * specified by size + offset extends beyond the end of the buffer or
92 * if data is NULL, no copy is performed.
93 * Called via glBufferSubDataARB().
96 st_bufferobj_subdata(GLcontext
*ctx
,
100 const GLvoid
* data
, struct gl_buffer_object
*obj
)
102 struct st_buffer_object
*st_obj
= st_buffer_object(obj
);
104 /* we may be called from VBO code, so double-check params here */
107 ASSERT(offset
+ size
<= obj
->Size
);
113 * According to ARB_vertex_buffer_object specification, if data is null,
114 * then the contents of the buffer object's data store is undefined. We just
115 * ignore, and leave it unchanged.
120 /* Now that transfers are per-context, we don't have to figure out
121 * flushing here. Usually drivers won't need to flush in this case
122 * even if the buffer is currently referenced by hardware - they
123 * just queue the upload as dma rather than mapping the underlying
126 pipe_buffer_write(st_context(ctx
)->pipe
,
133 * Called via glGetBufferSubDataARB().
136 st_bufferobj_get_subdata(GLcontext
*ctx
,
140 GLvoid
* data
, struct gl_buffer_object
*obj
)
142 struct st_buffer_object
*st_obj
= st_buffer_object(obj
);
144 /* we may be called from VBO code, so double-check params here */
147 ASSERT(offset
+ size
<= obj
->Size
);
152 pipe_buffer_read(st_context(ctx
)->pipe
, st_obj
->buffer
,
158 * Allocate space for and store data in a buffer object. Any data that was
159 * previously stored in the buffer object is lost. If data is NULL,
160 * memory will be allocated, but no copy will occur.
161 * Called via ctx->Driver.BufferData().
162 * \return GL_TRUE for success, GL_FALSE if out of memory
165 st_bufferobj_data(GLcontext
*ctx
,
170 struct gl_buffer_object
*obj
)
172 struct st_context
*st
= st_context(ctx
);
173 struct pipe_context
*pipe
= st
->pipe
;
174 struct st_buffer_object
*st_obj
= st_buffer_object(obj
);
175 unsigned buffer_usage
;
177 st_obj
->Base
.Size
= size
;
178 st_obj
->Base
.Usage
= usage
;
181 case GL_PIXEL_PACK_BUFFER_ARB
:
182 case GL_PIXEL_UNPACK_BUFFER_ARB
:
183 buffer_usage
= (PIPE_BIND_RENDER_TARGET
|
184 PIPE_BIND_BLIT_SOURCE
|
185 PIPE_BIND_BLIT_DESTINATION
);
187 case GL_ARRAY_BUFFER_ARB
:
188 buffer_usage
= PIPE_BIND_VERTEX_BUFFER
;
190 case GL_ELEMENT_ARRAY_BUFFER_ARB
:
191 buffer_usage
= PIPE_BIND_INDEX_BUFFER
;
197 pipe_resource_reference( &st_obj
->buffer
, NULL
);
200 st_obj
->buffer
= pipe_buffer_create(pipe
->screen
, buffer_usage
, size
);
202 if (!st_obj
->buffer
) {
207 st_no_flush_pipe_buffer_write(st_context(ctx
), st_obj
->buffer
, 0,
217 * Called via glMapBufferARB().
220 st_bufferobj_map(GLcontext
*ctx
, GLenum target
, GLenum access
,
221 struct gl_buffer_object
*obj
)
223 struct st_buffer_object
*st_obj
= st_buffer_object(obj
);
228 flags
= PIPE_TRANSFER_WRITE
;
231 flags
= PIPE_TRANSFER_READ
;
235 flags
= PIPE_TRANSFER_READ_WRITE
;
239 obj
->Pointer
= pipe_buffer_map(st_context(ctx
)->pipe
,
246 obj
->Length
= obj
->Size
;
253 * Dummy data whose's pointer is used for zero length ranges.
256 st_bufferobj_zero_length_range
= 0;
260 * Called via glMapBufferRange().
263 st_bufferobj_map_range(GLcontext
*ctx
, GLenum target
,
264 GLintptr offset
, GLsizeiptr length
, GLbitfield access
,
265 struct gl_buffer_object
*obj
)
267 struct pipe_context
*pipe
= st_context(ctx
)->pipe
;
268 struct st_buffer_object
*st_obj
= st_buffer_object(obj
);
269 enum pipe_transfer_usage flags
= 0x0;
271 if (access
& GL_MAP_WRITE_BIT
)
272 flags
|= PIPE_TRANSFER_WRITE
;
274 if (access
& GL_MAP_READ_BIT
)
275 flags
|= PIPE_TRANSFER_READ
;
277 if (access
& GL_MAP_FLUSH_EXPLICIT_BIT
)
278 flags
|= PIPE_TRANSFER_FLUSH_EXPLICIT
;
280 if (access
& GL_MAP_UNSYNCHRONIZED_BIT
)
281 flags
|= PIPE_TRANSFER_UNSYNCHRONIZED
;
283 /* ... other flags ...
286 if (access
& MESA_MAP_NOWAIT_BIT
)
287 flags
|= PIPE_TRANSFER_DONTBLOCK
;
291 assert(offset
< obj
->Size
);
292 assert(offset
+ length
<= obj
->Size
);
295 * We go out of way here to hide the degenerate yet valid case of zero
296 * length range from the pipe driver.
299 obj
->Pointer
= &st_bufferobj_zero_length_range
;
302 obj
->Pointer
= pipe_buffer_map_range(pipe
,
308 obj
->Pointer
= (ubyte
*) obj
->Pointer
+ offset
;
313 obj
->Offset
= offset
;
314 obj
->Length
= length
;
315 obj
->AccessFlags
= access
;
323 st_bufferobj_flush_mapped_range(GLcontext
*ctx
, GLenum target
,
324 GLintptr offset
, GLsizeiptr length
,
325 struct gl_buffer_object
*obj
)
327 struct pipe_context
*pipe
= st_context(ctx
)->pipe
;
328 struct st_buffer_object
*st_obj
= st_buffer_object(obj
);
330 /* Subrange is relative to mapped range */
333 assert(offset
+ length
<= obj
->Length
);
334 assert(obj
->Pointer
);
339 pipe_buffer_flush_mapped_range(pipe
, st_obj
->transfer
,
340 obj
->Offset
+ offset
, length
);
345 * Called via glUnmapBufferARB().
348 st_bufferobj_unmap(GLcontext
*ctx
, GLenum target
, struct gl_buffer_object
*obj
)
350 struct pipe_context
*pipe
= st_context(ctx
)->pipe
;
351 struct st_buffer_object
*st_obj
= st_buffer_object(obj
);
354 pipe_buffer_unmap(pipe
, st_obj
->buffer
, st_obj
->transfer
);
356 st_obj
->transfer
= NULL
;
365 * Called via glCopyBufferSubData().
368 st_copy_buffer_subdata(GLcontext
*ctx
,
369 struct gl_buffer_object
*src
,
370 struct gl_buffer_object
*dst
,
371 GLintptr readOffset
, GLintptr writeOffset
,
374 struct pipe_context
*pipe
= st_context(ctx
)->pipe
;
375 struct st_buffer_object
*srcObj
= st_buffer_object(src
);
376 struct st_buffer_object
*dstObj
= st_buffer_object(dst
);
377 struct pipe_transfer
*src_transfer
;
378 struct pipe_transfer
*dst_transfer
;
379 ubyte
*srcPtr
, *dstPtr
;
384 /* buffer should not already be mapped */
385 assert(!src
->Pointer
);
386 assert(!dst
->Pointer
);
388 srcPtr
= (ubyte
*) pipe_buffer_map_range(pipe
,
394 dstPtr
= (ubyte
*) pipe_buffer_map_range(pipe
,
400 if (srcPtr
&& dstPtr
)
401 memcpy(dstPtr
+ writeOffset
, srcPtr
+ readOffset
, size
);
403 pipe_buffer_unmap(pipe
, srcObj
->buffer
, src_transfer
);
404 pipe_buffer_unmap(pipe
, dstObj
->buffer
, dst_transfer
);
408 /* TODO: if buffer wasn't created with appropriate usage flags, need
409 * to recreate it now and copy contents -- or possibly create a
410 * gallium entrypoint to extend the usage flags and let the driver
411 * decide if a copy is necessary.
414 st_bufferobj_validate_usage(struct st_context
*st
,
415 struct st_buffer_object
*obj
,
422 st_init_bufferobject_functions(struct dd_function_table
*functions
)
424 functions
->NewBufferObject
= st_bufferobj_alloc
;
425 functions
->DeleteBuffer
= st_bufferobj_free
;
426 functions
->BufferData
= st_bufferobj_data
;
427 functions
->BufferSubData
= st_bufferobj_subdata
;
428 functions
->GetBufferSubData
= st_bufferobj_get_subdata
;
429 functions
->MapBuffer
= st_bufferobj_map
;
430 functions
->MapBufferRange
= st_bufferobj_map_range
;
431 functions
->FlushMappedBufferRange
= st_bufferobj_flush_mapped_range
;
432 functions
->UnmapBuffer
= st_bufferobj_unmap
;
433 functions
->CopyBufferSubData
= st_copy_buffer_subdata
;
435 /* For GL_APPLE_vertex_array_object */
436 functions
->NewArrayObject
= _mesa_new_array_object
;
437 functions
->DeleteArrayObject
= _mesa_delete_array_object
;