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);
81 pipe_buffer_reference(&st_obj->buffer, NULL);
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().
95 st_bufferobj_subdata(GLcontext *ctx,
99 const GLvoid * data, struct gl_buffer_object *obj)
101 struct st_buffer_object *st_obj = st_buffer_object(obj);
103 /* we may be called from VBO code, so double-check params here */
106 ASSERT(offset + size <= obj->Size);
112 * According to ARB_vertex_buffer_object specification, if data is null,
113 * then the contents of the buffer object's data store is undefined. We just
114 * ignore, and leave it unchanged.
119 st_cond_flush_pipe_buffer_write(st_context(ctx), st_obj->buffer,
125 * Called via glGetBufferSubDataARB().
128 st_bufferobj_get_subdata(GLcontext *ctx,
132 GLvoid * data, struct gl_buffer_object *obj)
134 struct st_buffer_object *st_obj = st_buffer_object(obj);
136 /* we may be called from VBO code, so double-check params here */
139 ASSERT(offset + size <= obj->Size);
144 st_cond_flush_pipe_buffer_read(st_context(ctx), st_obj->buffer,
150 * Allocate space for and store data in a buffer object. Any data that was
151 * previously stored in the buffer object is lost. If data is NULL,
152 * memory will be allocated, but no copy will occur.
153 * Called via ctx->Driver.BufferData().
154 * \return GL_TRUE for success, GL_FALSE if out of memory
157 st_bufferobj_data(GLcontext *ctx,
162 struct gl_buffer_object *obj)
164 struct st_context *st = st_context(ctx);
165 struct pipe_context *pipe = st->pipe;
166 struct st_buffer_object *st_obj = st_buffer_object(obj);
167 unsigned buffer_usage;
169 st_obj->Base.Size = size;
170 st_obj->Base.Usage = usage;
173 case GL_PIXEL_PACK_BUFFER_ARB:
174 case GL_PIXEL_UNPACK_BUFFER_ARB:
175 buffer_usage = PIPE_BUFFER_USAGE_PIXEL;
177 case GL_ARRAY_BUFFER_ARB:
178 buffer_usage = PIPE_BUFFER_USAGE_VERTEX;
180 case GL_ELEMENT_ARRAY_BUFFER_ARB:
181 buffer_usage = PIPE_BUFFER_USAGE_INDEX;
187 pipe_buffer_reference( &st_obj->buffer, NULL );
190 st_obj->buffer = pipe_buffer_create(pipe->screen, 32, buffer_usage, size);
192 if (!st_obj->buffer) {
197 st_no_flush_pipe_buffer_write(st_context(ctx), st_obj->buffer, 0,
207 * Called via glMapBufferARB().
210 st_bufferobj_map(GLcontext *ctx, GLenum target, GLenum access,
211 struct gl_buffer_object *obj)
213 struct st_buffer_object *st_obj = st_buffer_object(obj);
218 flags = PIPE_BUFFER_USAGE_CPU_WRITE;
221 flags = PIPE_BUFFER_USAGE_CPU_READ;
226 flags = PIPE_BUFFER_USAGE_CPU_READ | PIPE_BUFFER_USAGE_CPU_WRITE;
230 obj->Pointer = st_cond_flush_pipe_buffer_map(st_context(ctx),
235 obj->Length = obj->Size;
242 * Dummy data whose's pointer is used for zero length ranges.
245 st_bufferobj_zero_length_range = 0;
249 * Called via glMapBufferRange().
252 st_bufferobj_map_range(GLcontext *ctx, GLenum target,
253 GLintptr offset, GLsizeiptr length, GLbitfield access,
254 struct gl_buffer_object *obj)
256 struct pipe_context *pipe = st_context(ctx)->pipe;
257 struct st_buffer_object *st_obj = st_buffer_object(obj);
260 if (access & GL_MAP_WRITE_BIT)
261 flags |= PIPE_BUFFER_USAGE_CPU_WRITE;
263 if (access & GL_MAP_READ_BIT)
264 flags |= PIPE_BUFFER_USAGE_CPU_READ;
266 if (access & GL_MAP_FLUSH_EXPLICIT_BIT)
267 flags |= PIPE_BUFFER_USAGE_FLUSH_EXPLICIT;
269 if (access & GL_MAP_UNSYNCHRONIZED_BIT)
270 flags |= PIPE_BUFFER_USAGE_UNSYNCHRONIZED;
272 /* ... other flags ...
275 if (access & MESA_MAP_NOWAIT_BIT)
276 flags |= PIPE_BUFFER_USAGE_DONTBLOCK;
280 assert(offset < obj->Size);
281 assert(offset + length <= obj->Size);
284 * We go out of way here to hide the degenerate yet valid case of zero
285 * length range from the pipe driver.
288 obj->Pointer = &st_bufferobj_zero_length_range;
291 obj->Pointer = pipe_buffer_map_range(pipe->screen, st_obj->buffer, offset, length, flags);
293 obj->Pointer = (ubyte *) obj->Pointer + offset;
298 obj->Offset = offset;
299 obj->Length = length;
300 obj->AccessFlags = access;
308 st_bufferobj_flush_mapped_range(GLcontext *ctx, GLenum target,
309 GLintptr offset, GLsizeiptr length,
310 struct gl_buffer_object *obj)
312 struct pipe_context *pipe = st_context(ctx)->pipe;
313 struct st_buffer_object *st_obj = st_buffer_object(obj);
315 /* Subrange is relative to mapped range */
318 assert(offset + length <= obj->Length);
323 pipe_buffer_flush_mapped_range(pipe->screen, st_obj->buffer,
324 obj->Offset + offset, length);
329 * Called via glUnmapBufferARB().
332 st_bufferobj_unmap(GLcontext *ctx, GLenum target, struct gl_buffer_object *obj)
334 struct pipe_context *pipe = st_context(ctx)->pipe;
335 struct st_buffer_object *st_obj = st_buffer_object(obj);
338 pipe_buffer_unmap(pipe->screen, st_obj->buffer);
348 * Called via glCopyBufferSubData().
351 st_copy_buffer_subdata(GLcontext *ctx,
352 struct gl_buffer_object *src,
353 struct gl_buffer_object *dst,
354 GLintptr readOffset, GLintptr writeOffset,
357 struct pipe_context *pipe = st_context(ctx)->pipe;
358 struct st_buffer_object *srcObj = st_buffer_object(src);
359 struct st_buffer_object *dstObj = st_buffer_object(dst);
360 ubyte *srcPtr, *dstPtr;
365 /* buffer should not already be mapped */
366 assert(!src->Pointer);
367 assert(!dst->Pointer);
369 srcPtr = (ubyte *) pipe_buffer_map_range(pipe->screen,
372 PIPE_BUFFER_USAGE_CPU_READ);
374 dstPtr = (ubyte *) pipe_buffer_map_range(pipe->screen,
377 PIPE_BUFFER_USAGE_CPU_WRITE);
379 if (srcPtr && dstPtr)
380 memcpy(dstPtr + writeOffset, srcPtr + readOffset, size);
382 pipe_buffer_unmap(pipe->screen, srcObj->buffer);
383 pipe_buffer_unmap(pipe->screen, dstObj->buffer);
388 st_init_bufferobject_functions(struct dd_function_table *functions)
390 functions->NewBufferObject = st_bufferobj_alloc;
391 functions->DeleteBuffer = st_bufferobj_free;
392 functions->BufferData = st_bufferobj_data;
393 functions->BufferSubData = st_bufferobj_subdata;
394 functions->GetBufferSubData = st_bufferobj_get_subdata;
395 functions->MapBuffer = st_bufferobj_map;
396 functions->MapBufferRange = st_bufferobj_map_range;
397 functions->FlushMappedBufferRange = st_bufferobj_flush_mapped_range;
398 functions->UnmapBuffer = st_bufferobj_unmap;
399 functions->CopyBufferSubData = st_copy_buffer_subdata;
401 /* For GL_APPLE_vertex_array_object */
402 functions->NewArrayObject = _mesa_new_array_object;
403 functions->DeleteArrayObject = _mesa_delete_array_object;