1 /**************************************************************************
3 * Copyright 2003 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 **************************************************************************/
29 #include "main/imports.h"
30 #include "main/mtypes.h"
31 #include "main/bufferobj.h"
33 #include "intel_context.h"
34 #include "intel_buffer_objects.h"
35 #include "intel_batchbuffer.h"
36 #include "intel_regions.h"
38 static GLboolean
intel_bufferobj_unmap(GLcontext
* ctx
,
40 struct gl_buffer_object
*obj
);
42 /** Allocates a new dri_bo to store the data for the buffer object. */
44 intel_bufferobj_alloc_buffer(struct intel_context
*intel
,
45 struct intel_buffer_object
*intel_obj
)
47 intel_obj
->buffer
= dri_bo_alloc(intel
->bufmgr
, "bufferobj",
48 intel_obj
->Base
.Size
, 64);
52 * There is some duplication between mesa's bufferobjects and our
53 * bufmgr buffers. Both have an integer handle and a hashtable to
54 * lookup an opaque structure. It would be nice if the handles and
55 * internal structure where somehow shared.
57 static struct gl_buffer_object
*
58 intel_bufferobj_alloc(GLcontext
* ctx
, GLuint name
, GLenum target
)
60 struct intel_buffer_object
*obj
= CALLOC_STRUCT(intel_buffer_object
);
62 _mesa_initialize_buffer_object(&obj
->Base
, name
, target
);
69 /* Break the COW tie to the region. The region gets to keep the data.
72 intel_bufferobj_release_region(struct intel_context
*intel
,
73 struct intel_buffer_object
*intel_obj
)
75 assert(intel_obj
->region
->buffer
== intel_obj
->buffer
);
76 intel_obj
->region
->pbo
= NULL
;
77 intel_obj
->region
= NULL
;
79 dri_bo_unreference(intel_obj
->buffer
);
80 intel_obj
->buffer
= NULL
;
83 /* Break the COW tie to the region. Both the pbo and the region end
84 * up with a copy of the data.
87 intel_bufferobj_cow(struct intel_context
*intel
,
88 struct intel_buffer_object
*intel_obj
)
90 assert(intel_obj
->region
);
91 intel_region_cow(intel
, intel_obj
->region
);
96 * Deallocate/free a vertex/pixel buffer object.
97 * Called via glDeleteBuffersARB().
100 intel_bufferobj_free(GLcontext
* ctx
, struct gl_buffer_object
*obj
)
102 struct intel_context
*intel
= intel_context(ctx
);
103 struct intel_buffer_object
*intel_obj
= intel_buffer_object(obj
);
107 /* Buffer objects are automatically unmapped when deleting according
111 intel_bufferobj_unmap(ctx
, 0, obj
);
113 if (intel_obj
->region
) {
114 intel_bufferobj_release_region(intel
, intel_obj
);
116 else if (intel_obj
->buffer
) {
117 dri_bo_unreference(intel_obj
->buffer
);
120 _mesa_free(intel_obj
);
126 * Allocate space for and store data in a buffer object. Any data that was
127 * previously stored in the buffer object is lost. If data is NULL,
128 * memory will be allocated, but no copy will occur.
129 * Called via glBufferDataARB().
132 intel_bufferobj_data(GLcontext
* ctx
,
136 GLenum usage
, struct gl_buffer_object
*obj
)
138 struct intel_context
*intel
= intel_context(ctx
);
139 struct intel_buffer_object
*intel_obj
= intel_buffer_object(obj
);
141 intel_obj
->Base
.Size
= size
;
142 intel_obj
->Base
.Usage
= usage
;
144 /* Buffer objects are automatically unmapped when creating new data buffers
145 * according to the spec.
148 intel_bufferobj_unmap(ctx
, 0, obj
);
150 if (intel_obj
->region
)
151 intel_bufferobj_release_region(intel
, intel_obj
);
153 if (intel_obj
->buffer
!= NULL
) {
154 dri_bo_unreference(intel_obj
->buffer
);
155 intel_obj
->buffer
= NULL
;
158 intel_bufferobj_alloc_buffer(intel
, intel_obj
);
161 dri_bo_subdata(intel_obj
->buffer
, 0, size
, data
);
167 * Replace data in a subrange of buffer object. If the data range
168 * specified by size + offset extends beyond the end of the buffer or
169 * if data is NULL, no copy is performed.
170 * Called via glBufferSubDataARB().
173 intel_bufferobj_subdata(GLcontext
* ctx
,
177 const GLvoid
* data
, struct gl_buffer_object
*obj
)
179 struct intel_context
*intel
= intel_context(ctx
);
180 struct intel_buffer_object
*intel_obj
= intel_buffer_object(obj
);
184 if (intel_obj
->region
)
185 intel_bufferobj_cow(intel
, intel_obj
);
187 dri_bo_subdata(intel_obj
->buffer
, offset
, size
, data
);
192 * Called via glGetBufferSubDataARB().
195 intel_bufferobj_get_subdata(GLcontext
* ctx
,
199 GLvoid
* data
, struct gl_buffer_object
*obj
)
201 struct intel_buffer_object
*intel_obj
= intel_buffer_object(obj
);
204 dri_bo_get_subdata(intel_obj
->buffer
, offset
, size
, data
);
210 * Called via glMapBufferARB().
213 intel_bufferobj_map(GLcontext
* ctx
,
215 GLenum access
, struct gl_buffer_object
*obj
)
217 struct intel_context
*intel
= intel_context(ctx
);
218 struct intel_buffer_object
*intel_obj
= intel_buffer_object(obj
);
220 /* XXX: Translate access to flags arg below:
224 if (intel_obj
->region
)
225 intel_bufferobj_cow(intel
, intel_obj
);
227 if (intel_obj
->buffer
== NULL
) {
232 dri_bo_map(intel_obj
->buffer
, GL_TRUE
);
233 obj
->Pointer
= intel_obj
->buffer
->virtual;
239 * Called via glMapBufferARB().
242 intel_bufferobj_unmap(GLcontext
* ctx
,
243 GLenum target
, struct gl_buffer_object
*obj
)
245 struct intel_buffer_object
*intel_obj
= intel_buffer_object(obj
);
248 if (intel_obj
->buffer
!= NULL
) {
249 assert(obj
->Pointer
);
250 dri_bo_unmap(intel_obj
->buffer
);
257 intel_bufferobj_buffer(struct intel_context
*intel
,
258 struct intel_buffer_object
*intel_obj
, GLuint flag
)
260 if (intel_obj
->region
) {
261 if (flag
== INTEL_WRITE_PART
)
262 intel_bufferobj_cow(intel
, intel_obj
);
263 else if (flag
== INTEL_WRITE_FULL
) {
264 intel_bufferobj_release_region(intel
, intel_obj
);
265 intel_bufferobj_alloc_buffer(intel
, intel_obj
);
269 return intel_obj
->buffer
;
273 intel_bufferobj_init(struct intel_context
*intel
)
275 GLcontext
*ctx
= &intel
->ctx
;
277 ctx
->Driver
.NewBufferObject
= intel_bufferobj_alloc
;
278 ctx
->Driver
.DeleteBuffer
= intel_bufferobj_free
;
279 ctx
->Driver
.BufferData
= intel_bufferobj_data
;
280 ctx
->Driver
.BufferSubData
= intel_bufferobj_subdata
;
281 ctx
->Driver
.GetBufferSubData
= intel_bufferobj_get_subdata
;
282 ctx
->Driver
.MapBuffer
= intel_bufferobj_map
;
283 ctx
->Driver
.UnmapBuffer
= intel_bufferobj_unmap
;