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"
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(struct gl_context
*ctx
, GLuint name
, GLenum target
)
57 struct st_buffer_object
*st_obj
= ST_CALLOC_STRUCT(st_buffer_object
);
62 _mesa_initialize_buffer_object(ctx
, &st_obj
->Base
, name
, target
);
70 * Deallocate/free a vertex/pixel buffer object.
71 * Called via glDeleteBuffersARB().
74 st_bufferobj_free(struct gl_context
*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
);
84 free(st_obj
->Base
.Label
);
91 * Replace data in a subrange of buffer object. If the data range
92 * specified by size + offset extends beyond the end of the buffer or
93 * if data is NULL, no copy is performed.
94 * Called via glBufferSubDataARB().
97 st_bufferobj_subdata(struct gl_context
*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 if (!st_obj
->buffer
) {
121 /* we probably ran out of memory during buffer allocation */
125 /* Now that transfers are per-context, we don't have to figure out
126 * flushing here. Usually drivers won't need to flush in this case
127 * even if the buffer is currently referenced by hardware - they
128 * just queue the upload as dma rather than mapping the underlying
131 pipe_buffer_write(st_context(ctx
)->pipe
,
138 * Called via glGetBufferSubDataARB().
141 st_bufferobj_get_subdata(struct gl_context
*ctx
,
144 GLvoid
* data
, struct gl_buffer_object
*obj
)
146 struct st_buffer_object
*st_obj
= st_buffer_object(obj
);
148 /* we may be called from VBO code, so double-check params here */
151 ASSERT(offset
+ size
<= obj
->Size
);
156 if (!st_obj
->buffer
) {
157 /* we probably ran out of memory during buffer allocation */
161 pipe_buffer_read(st_context(ctx
)->pipe
, st_obj
->buffer
,
167 * Allocate space for and store data in a buffer object. Any data that was
168 * previously stored in the buffer object is lost. If data is NULL,
169 * memory will be allocated, but no copy will occur.
170 * Called via ctx->Driver.BufferData().
171 * \return GL_TRUE for success, GL_FALSE if out of memory
174 st_bufferobj_data(struct gl_context
*ctx
,
179 struct gl_buffer_object
*obj
)
181 struct st_context
*st
= st_context(ctx
);
182 struct pipe_context
*pipe
= st
->pipe
;
183 struct st_buffer_object
*st_obj
= st_buffer_object(obj
);
184 unsigned bind
, pipe_usage
;
186 if (size
&& data
&& st_obj
->buffer
&&
187 st_obj
->Base
.Size
== size
&& st_obj
->Base
.Usage
== usage
) {
188 /* Just discard the old contents and write new data.
189 * This should be the same as creating a new buffer, but we avoid
190 * a lot of validation in Mesa.
194 u_box_1d(0, size
, &box
);
195 pipe
->transfer_inline_write(pipe
, st_obj
->buffer
, 0,
196 PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE
,
201 st_obj
->Base
.Size
= size
;
202 st_obj
->Base
.Usage
= usage
;
205 case GL_PIXEL_PACK_BUFFER_ARB
:
206 case GL_PIXEL_UNPACK_BUFFER_ARB
:
207 bind
= PIPE_BIND_RENDER_TARGET
| PIPE_BIND_SAMPLER_VIEW
;
209 case GL_ARRAY_BUFFER_ARB
:
210 bind
= PIPE_BIND_VERTEX_BUFFER
;
212 case GL_ELEMENT_ARRAY_BUFFER_ARB
:
213 bind
= PIPE_BIND_INDEX_BUFFER
;
215 case GL_TEXTURE_BUFFER
:
216 bind
= PIPE_BIND_SAMPLER_VIEW
;
218 case GL_TRANSFORM_FEEDBACK_BUFFER
:
219 bind
= PIPE_BIND_STREAM_OUTPUT
;
221 case GL_UNIFORM_BUFFER
:
222 bind
= PIPE_BIND_CONSTANT_BUFFER
;
232 pipe_usage
= PIPE_USAGE_STATIC
;
234 case GL_DYNAMIC_DRAW
:
235 case GL_DYNAMIC_READ
:
236 case GL_DYNAMIC_COPY
:
237 pipe_usage
= PIPE_USAGE_DYNAMIC
;
242 pipe_usage
= PIPE_USAGE_STREAM
;
245 pipe_usage
= PIPE_USAGE_DEFAULT
;
248 pipe_resource_reference( &st_obj
->buffer
, NULL
);
250 if (ST_DEBUG
& DEBUG_BUFFER
) {
251 debug_printf("Create buffer size %td bind 0x%x\n", size
, bind
);
255 st_obj
->buffer
= pipe_buffer_create(pipe
->screen
, bind
,
258 if (!st_obj
->buffer
) {
260 st_obj
->Base
.Size
= 0;
265 pipe_buffer_write(pipe
, st_obj
->buffer
, 0, size
, data
);
268 /* BufferData may change an array or uniform buffer, need to update it */
269 st
->dirty
.st
|= ST_NEW_VERTEX_ARRAYS
| ST_NEW_UNIFORM_BUFFER
;
276 * Called via glMapBufferRange().
279 st_bufferobj_map_range(struct gl_context
*ctx
,
280 GLintptr offset
, GLsizeiptr length
, GLbitfield access
,
281 struct gl_buffer_object
*obj
)
283 struct pipe_context
*pipe
= st_context(ctx
)->pipe
;
284 struct st_buffer_object
*st_obj
= st_buffer_object(obj
);
285 enum pipe_transfer_usage flags
= 0x0;
287 if (access
& GL_MAP_WRITE_BIT
)
288 flags
|= PIPE_TRANSFER_WRITE
;
290 if (access
& GL_MAP_READ_BIT
)
291 flags
|= PIPE_TRANSFER_READ
;
293 if (access
& GL_MAP_FLUSH_EXPLICIT_BIT
)
294 flags
|= PIPE_TRANSFER_FLUSH_EXPLICIT
;
296 if (access
& GL_MAP_INVALIDATE_BUFFER_BIT
) {
297 flags
|= PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE
;
299 else if (access
& GL_MAP_INVALIDATE_RANGE_BIT
) {
300 if (offset
== 0 && length
== obj
->Size
)
301 flags
|= PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE
;
303 flags
|= PIPE_TRANSFER_DISCARD_RANGE
;
306 if (access
& GL_MAP_UNSYNCHRONIZED_BIT
)
307 flags
|= PIPE_TRANSFER_UNSYNCHRONIZED
;
309 /* ... other flags ...
312 if (access
& MESA_MAP_NOWAIT_BIT
)
313 flags
|= PIPE_TRANSFER_DONTBLOCK
;
317 assert(offset
< obj
->Size
);
318 assert(offset
+ length
<= obj
->Size
);
320 obj
->Pointer
= pipe_buffer_map_range(pipe
,
326 obj
->Offset
= offset
;
327 obj
->Length
= length
;
328 obj
->AccessFlags
= access
;
331 st_obj
->transfer
= NULL
;
339 st_bufferobj_flush_mapped_range(struct gl_context
*ctx
,
340 GLintptr offset
, GLsizeiptr length
,
341 struct gl_buffer_object
*obj
)
343 struct pipe_context
*pipe
= st_context(ctx
)->pipe
;
344 struct st_buffer_object
*st_obj
= st_buffer_object(obj
);
346 /* Subrange is relative to mapped range */
349 assert(offset
+ length
<= obj
->Length
);
350 assert(obj
->Pointer
);
355 pipe_buffer_flush_mapped_range(pipe
, st_obj
->transfer
,
356 obj
->Offset
+ offset
, length
);
361 * Called via glUnmapBufferARB().
364 st_bufferobj_unmap(struct gl_context
*ctx
, struct gl_buffer_object
*obj
)
366 struct pipe_context
*pipe
= st_context(ctx
)->pipe
;
367 struct st_buffer_object
*st_obj
= st_buffer_object(obj
);
370 pipe_buffer_unmap(pipe
, st_obj
->transfer
);
372 st_obj
->transfer
= NULL
;
381 * Called via glCopyBufferSubData().
384 st_copy_buffer_subdata(struct gl_context
*ctx
,
385 struct gl_buffer_object
*src
,
386 struct gl_buffer_object
*dst
,
387 GLintptr readOffset
, GLintptr writeOffset
,
390 struct pipe_context
*pipe
= st_context(ctx
)->pipe
;
391 struct st_buffer_object
*srcObj
= st_buffer_object(src
);
392 struct st_buffer_object
*dstObj
= st_buffer_object(dst
);
398 /* buffer should not already be mapped */
399 assert(!src
->Pointer
);
400 assert(!dst
->Pointer
);
402 u_box_1d(readOffset
, size
, &box
);
404 pipe
->resource_copy_region(pipe
, dstObj
->buffer
, 0, writeOffset
, 0, 0,
405 srcObj
->buffer
, 0, &box
);
409 /* TODO: if buffer wasn't created with appropriate usage flags, need
410 * to recreate it now and copy contents -- or possibly create a
411 * gallium entrypoint to extend the usage flags and let the driver
412 * decide if a copy is necessary.
415 st_bufferobj_validate_usage(struct st_context
*st
,
416 struct st_buffer_object
*obj
,
423 st_init_bufferobject_functions(struct dd_function_table
*functions
)
425 functions
->NewBufferObject
= st_bufferobj_alloc
;
426 functions
->DeleteBuffer
= st_bufferobj_free
;
427 functions
->BufferData
= st_bufferobj_data
;
428 functions
->BufferSubData
= st_bufferobj_subdata
;
429 functions
->GetBufferSubData
= st_bufferobj_get_subdata
;
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
;