st_cb_bufferobjects.c revision 34bb024cf2d02d5d5cb672ead05fa131bdff6dd8 
1/**************************************************************************
2 *
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * All Rights Reserved.
5 *
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:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
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.
25 *
26 **************************************************************************/
27
28
29#include "main/imports.h"
30#include "main/mtypes.h"
31#include "main/bufferobj.h"
32
33#include "st_inlines.h"
34#include "st_context.h"
35#include "st_cb_bufferobjects.h"
36
37#include "pipe/p_context.h"
38#include "pipe/p_defines.h"
39#include "pipe/p_inlines.h"
40
41
42
43/* Pixel buffers and Vertex/index buffers are handled through these
44 * mesa callbacks.  Framebuffer/Renderbuffer objects are
45 * created/managed elsewhere.
46 */
47
48
49
50/**
51 * There is some duplication between mesa's bufferobjects and our
52 * bufmgr buffers.  Both have an integer handle and a hashtable to
53 * lookup an opaque structure.  It would be nice if the handles and
54 * internal structure where somehow shared.
55 */
56static struct gl_buffer_object *
57st_bufferobj_alloc(GLcontext *ctx, GLuint name, GLenum target)
58{
59   struct st_buffer_object *st_obj = ST_CALLOC_STRUCT(st_buffer_object);
60
61   if (!st_obj)
62      return NULL;
63
64   _mesa_initialize_buffer_object(&st_obj->Base, name, target);
65
66   return &st_obj->Base;
67}
68
69
70
71/**
72 * Deallocate/free a vertex/pixel buffer object.
73 * Called via glDeleteBuffersARB().
74 */
75static void
76st_bufferobj_free(GLcontext *ctx, struct gl_buffer_object *obj)
77{
78   struct st_buffer_object *st_obj = st_buffer_object(obj);
79
80   if (st_obj->buffer)
81      pipe_buffer_reference(&st_obj->buffer, NULL);
82
83   _mesa_free(st_obj);
84}
85
86
87
88/**
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().
93 */
94static void
95st_bufferobj_subdata(GLcontext *ctx,
96		     GLenum target,
97		     GLintptrARB offset,
98		     GLsizeiptrARB size,
99		     const GLvoid * data, struct gl_buffer_object *obj)
100{
101   struct st_buffer_object *st_obj = st_buffer_object(obj);
102
103   if (offset >= st_obj->size || size > (st_obj->size - offset))
104      return;
105
106   st_cond_flush_pipe_buffer_write(st_context(ctx), st_obj->buffer,
107				   offset, size, data);
108}
109
110
111/**
112 * Called via glGetBufferSubDataARB().
113 */
114static void
115st_bufferobj_get_subdata(GLcontext *ctx,
116                         GLenum target,
117                         GLintptrARB offset,
118                         GLsizeiptrARB size,
119                         GLvoid * data, struct gl_buffer_object *obj)
120{
121   struct st_buffer_object *st_obj = st_buffer_object(obj);
122
123   if (offset >= st_obj->size || size > (st_obj->size - offset))
124      return;
125
126   st_cond_flush_pipe_buffer_read(st_context(ctx), st_obj->buffer,
127				  offset, size, data);
128}
129
130
131/**
132 * Allocate space for and store data in a buffer object.  Any data that was
133 * previously stored in the buffer object is lost.  If data is NULL,
134 * memory will be allocated, but no copy will occur.
135 * Called via glBufferDataARB().
136 */
137static void
138st_bufferobj_data(GLcontext *ctx,
139		  GLenum target,
140		  GLsizeiptrARB size,
141		  const GLvoid * data,
142		  GLenum usage,
143		  struct gl_buffer_object *obj)
144{
145   struct st_context *st = st_context(ctx);
146   struct pipe_context *pipe = st->pipe;
147   struct st_buffer_object *st_obj = st_buffer_object(obj);
148   unsigned buffer_usage;
149
150   st_obj->Base.Size = size;
151   st_obj->Base.Usage = usage;
152
153   switch(target) {
154   case GL_PIXEL_PACK_BUFFER_ARB:
155   case GL_PIXEL_UNPACK_BUFFER_ARB:
156      buffer_usage = PIPE_BUFFER_USAGE_PIXEL;
157      break;
158   case GL_ARRAY_BUFFER_ARB:
159      buffer_usage = PIPE_BUFFER_USAGE_VERTEX;
160      break;
161   case GL_ELEMENT_ARRAY_BUFFER_ARB:
162      buffer_usage = PIPE_BUFFER_USAGE_INDEX;
163      break;
164   default:
165      buffer_usage = 0;
166   }
167
168   pipe_buffer_reference( &st_obj->buffer, NULL );
169
170   st_obj->buffer = pipe_buffer_create( pipe->screen, 32, buffer_usage, size );
171
172   if (!st_obj->buffer) {
173      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBufferDataARB");
174      return;
175   }
176
177   st_obj->size = size;
178
179   if (data)
180      st_no_flush_pipe_buffer_write(st_context(ctx), st_obj->buffer, 0,
181				    size, data);
182}
183
184
185/**
186 * Called via glMapBufferARB().
187 */
188static void *
189st_bufferobj_map(GLcontext *ctx, GLenum target, GLenum access,
190                 struct gl_buffer_object *obj)
191{
192   struct st_buffer_object *st_obj = st_buffer_object(obj);
193   GLuint flags;
194
195   switch (access) {
196   case GL_WRITE_ONLY:
197      flags = PIPE_BUFFER_USAGE_CPU_WRITE;
198      break;
199   case GL_READ_ONLY:
200      flags = PIPE_BUFFER_USAGE_CPU_READ;
201      break;
202   case GL_READ_WRITE:
203      /* fall-through */
204   default:
205      flags = PIPE_BUFFER_USAGE_CPU_READ | PIPE_BUFFER_USAGE_CPU_WRITE;
206      break;
207   }
208
209   obj->Pointer = st_cond_flush_pipe_buffer_map(st_context(ctx),
210						st_obj->buffer,
211						flags);
212   if(obj->Pointer) {
213      obj->Offset = 0;
214      obj->Length = obj->Size;
215   }
216   return obj->Pointer;
217}
218
219
220
221/**
222 * Called via glMapBufferRange().
223 */
224static void *
225st_bufferobj_map_range(GLcontext *ctx, GLenum target,
226                       GLintptr offset, GLsizeiptr length, GLbitfield access,
227                       struct gl_buffer_object *obj)
228{
229   struct pipe_context *pipe = st_context(ctx)->pipe;
230   struct st_buffer_object *st_obj = st_buffer_object(obj);
231   GLuint flags = 0;
232   char *map;
233
234   if (access & GL_MAP_WRITE_BIT)
235      flags |= PIPE_BUFFER_USAGE_CPU_WRITE;
236
237   if (access & GL_MAP_READ_BIT)
238      flags |= PIPE_BUFFER_USAGE_CPU_READ;
239
240   /* ... other flags ...
241    */
242
243   if (access & MESA_MAP_NOWAIT_BIT)
244      flags |= PIPE_BUFFER_USAGE_DONTBLOCK;
245
246   assert(offset >= 0);
247   assert(length >= 0);
248   assert(offset < obj->Size);
249   assert(offset + length <= obj->Size);
250
251   map = obj->Pointer = pipe_buffer_map_range(pipe->screen, st_obj->buffer, offset, length, flags);
252   if(obj->Pointer) {
253      obj->Offset = 0;
254      obj->Length = length;
255      map += offset;
256   }
257
258   return map;
259}
260
261
262static void
263st_bufferobj_flush_mapped_range(GLcontext *ctx, GLenum target,
264                                GLintptr offset, GLsizeiptr length,
265                                struct gl_buffer_object *obj)
266{
267   struct pipe_context *pipe = st_context(ctx)->pipe;
268   struct st_buffer_object *st_obj = st_buffer_object(obj);
269
270   /* Subrange is relative to mapped range */
271   assert(offset >= 0);
272   assert(length >= 0);
273   assert(offset + length <= obj->Length);
274
275   pipe_buffer_flush_mapped_range(pipe->screen, st_obj->buffer,
276                                  obj->Offset + offset, length);
277}
278
279
280/**
281 * Called via glUnmapBufferARB().
282 */
283static GLboolean
284st_bufferobj_unmap(GLcontext *ctx, GLenum target, struct gl_buffer_object *obj)
285{
286   struct pipe_context *pipe = st_context(ctx)->pipe;
287   struct st_buffer_object *st_obj = st_buffer_object(obj);
288
289   pipe_buffer_unmap(pipe->screen, st_obj->buffer);
290   obj->Pointer = NULL;
291   obj->Offset = 0;
292   obj->Length = 0;
293   return GL_TRUE;
294}
295
296
297void
298st_init_bufferobject_functions(struct dd_function_table *functions)
299{
300   functions->NewBufferObject = st_bufferobj_alloc;
301   functions->DeleteBuffer = st_bufferobj_free;
302   functions->BufferData = st_bufferobj_data;
303   functions->BufferSubData = st_bufferobj_subdata;
304   functions->GetBufferSubData = st_bufferobj_get_subdata;
305   functions->MapBuffer = st_bufferobj_map;
306   functions->MapBufferRange = st_bufferobj_map_range;
307   functions->FlushMappedBufferRange = st_bufferobj_flush_mapped_range;
308   functions->UnmapBuffer = st_bufferobj_unmap;
309}
310