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 **************************************************************************/
31 #include "bufferobj.h"
33 #include "intel_context.h"
34 #include "intel_buffer_objects.h"
35 #include "intel_batchbuffer.h"
36 #include "intel_regions.h"
37 #include "dri_bufmgr.h"
39 static GLboolean
intel_bufferobj_unmap(GLcontext
* ctx
,
41 struct gl_buffer_object
*obj
);
43 /** Allocates a new dri_bo to store the data for the buffer object. */
45 intel_bufferobj_alloc_buffer(struct intel_context
*intel
,
46 struct intel_buffer_object
*intel_obj
)
48 intel_obj
->buffer
= dri_bo_alloc(intel
->bufmgr
, "bufferobj",
49 intel_obj
->Base
.Size
, 64);
53 * There is some duplication between mesa's bufferobjects and our
54 * bufmgr buffers. Both have an integer handle and a hashtable to
55 * lookup an opaque structure. It would be nice if the handles and
56 * internal structure where somehow shared.
58 static struct gl_buffer_object
*
59 intel_bufferobj_alloc(GLcontext
* ctx
, GLuint name
, GLenum target
)
61 struct intel_buffer_object
*obj
= CALLOC_STRUCT(intel_buffer_object
);
63 _mesa_initialize_buffer_object(&obj
->Base
, name
, target
);
70 /* Break the COW tie to the region. The region gets to keep the data.
73 intel_bufferobj_release_region(struct intel_context
*intel
,
74 struct intel_buffer_object
*intel_obj
)
76 assert(intel_obj
->region
->buffer
== intel_obj
->buffer
);
77 intel_obj
->region
->pbo
= NULL
;
78 intel_obj
->region
= NULL
;
80 dri_bo_unreference(intel_obj
->buffer
);
81 intel_obj
->buffer
= NULL
;
84 /* Break the COW tie to the region. Both the pbo and the region end
85 * up with a copy of the data.
88 intel_bufferobj_cow(struct intel_context
*intel
,
89 struct intel_buffer_object
*intel_obj
)
91 assert(intel_obj
->region
);
92 intel_region_cow(intel
, intel_obj
->region
);
97 * Deallocate/free a vertex/pixel buffer object.
98 * Called via glDeleteBuffersARB().
101 intel_bufferobj_free(GLcontext
* ctx
, struct gl_buffer_object
*obj
)
103 struct intel_context
*intel
= intel_context(ctx
);
104 struct intel_buffer_object
*intel_obj
= intel_buffer_object(obj
);
108 /* Buffer objects are automatically unmapped when deleting according
112 intel_bufferobj_unmap(ctx
, 0, obj
);
114 if (intel_obj
->region
) {
115 intel_bufferobj_release_region(intel
, intel_obj
);
117 else if (intel_obj
->buffer
) {
118 dri_bo_unreference(intel_obj
->buffer
);
121 _mesa_free(intel_obj
);
127 * Allocate space for and store data in a buffer object. Any data that was
128 * previously stored in the buffer object is lost. If data is NULL,
129 * memory will be allocated, but no copy will occur.
130 * Called via glBufferDataARB().
133 intel_bufferobj_data(GLcontext
* ctx
,
137 GLenum usage
, struct gl_buffer_object
*obj
)
139 struct intel_context
*intel
= intel_context(ctx
);
140 struct intel_buffer_object
*intel_obj
= intel_buffer_object(obj
);
142 intel_obj
->Base
.Size
= size
;
143 intel_obj
->Base
.Usage
= usage
;
145 /* Buffer objects are automatically unmapped when creating new data buffers
146 * according to the spec.
149 intel_bufferobj_unmap(ctx
, 0, obj
);
151 if (intel_obj
->region
)
152 intel_bufferobj_release_region(intel
, intel_obj
);
154 if (intel_obj
->buffer
!= NULL
) {
155 dri_bo_unreference(intel_obj
->buffer
);
156 intel_obj
->buffer
= NULL
;
159 intel_bufferobj_alloc_buffer(intel
, intel_obj
);
162 dri_bo_subdata(intel_obj
->buffer
, 0, size
, data
);
168 * Replace data in a subrange of buffer object. If the data range
169 * specified by size + offset extends beyond the end of the buffer or
170 * if data is NULL, no copy is performed.
171 * Called via glBufferSubDataARB().
174 intel_bufferobj_subdata(GLcontext
* ctx
,
178 const GLvoid
* data
, struct gl_buffer_object
*obj
)
180 struct intel_context
*intel
= intel_context(ctx
);
181 struct intel_buffer_object
*intel_obj
= intel_buffer_object(obj
);
185 if (intel_obj
->region
)
186 intel_bufferobj_cow(intel
, intel_obj
);
188 dri_bo_subdata(intel_obj
->buffer
, offset
, size
, data
);
193 * Called via glGetBufferSubDataARB().
196 intel_bufferobj_get_subdata(GLcontext
* ctx
,
200 GLvoid
* data
, struct gl_buffer_object
*obj
)
202 struct intel_buffer_object
*intel_obj
= intel_buffer_object(obj
);
205 dri_bo_get_subdata(intel_obj
->buffer
, offset
, size
, data
);
211 * Called via glMapBufferARB().
214 intel_bufferobj_map(GLcontext
* ctx
,
216 GLenum access
, struct gl_buffer_object
*obj
)
218 struct intel_context
*intel
= intel_context(ctx
);
219 struct intel_buffer_object
*intel_obj
= intel_buffer_object(obj
);
221 /* XXX: Translate access to flags arg below:
225 if (intel_obj
->region
)
226 intel_bufferobj_cow(intel
, intel_obj
);
228 if (intel_obj
->buffer
== NULL
) {
233 dri_bo_map(intel_obj
->buffer
, GL_TRUE
);
234 obj
->Pointer
= intel_obj
->buffer
->virtual;
240 * Called via glMapBufferARB().
243 intel_bufferobj_unmap(GLcontext
* ctx
,
244 GLenum target
, struct gl_buffer_object
*obj
)
246 struct intel_buffer_object
*intel_obj
= intel_buffer_object(obj
);
249 if (intel_obj
->buffer
!= NULL
) {
250 assert(obj
->Pointer
);
251 dri_bo_unmap(intel_obj
->buffer
);
258 intel_bufferobj_buffer(struct intel_context
*intel
,
259 struct intel_buffer_object
*intel_obj
, GLuint flag
)
261 if (intel_obj
->region
) {
262 if (flag
== INTEL_WRITE_PART
)
263 intel_bufferobj_cow(intel
, intel_obj
);
264 else if (flag
== INTEL_WRITE_FULL
) {
265 intel_bufferobj_release_region(intel
, intel_obj
);
266 intel_bufferobj_alloc_buffer(intel
, intel_obj
);
270 return intel_obj
->buffer
;
274 intel_bufferobj_init(struct intel_context
*intel
)
276 GLcontext
*ctx
= &intel
->ctx
;
278 ctx
->Driver
.NewBufferObject
= intel_bufferobj_alloc
;
279 ctx
->Driver
.DeleteBuffer
= intel_bufferobj_free
;
280 ctx
->Driver
.BufferData
= intel_bufferobj_data
;
281 ctx
->Driver
.BufferSubData
= intel_bufferobj_subdata
;
282 ctx
->Driver
.GetBufferSubData
= intel_bufferobj_get_subdata
;
283 ctx
->Driver
.MapBuffer
= intel_bufferobj_map
;
284 ctx
->Driver
.UnmapBuffer
= intel_bufferobj_unmap
;