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"
42 #include "pipe/p_context.h"
43 #include "pipe/p_defines.h"
44 #include "util/u_inlines.h"
48 * There is some duplication between mesa's bufferobjects and our
49 * bufmgr buffers. Both have an integer handle and a hashtable to
50 * lookup an opaque structure. It would be nice if the handles and
51 * internal structure where somehow shared.
53 static struct gl_buffer_object *
54 st_bufferobj_alloc(struct gl_context *ctx, GLuint name, GLenum target)
56 struct st_buffer_object *st_obj = ST_CALLOC_STRUCT(st_buffer_object);
61 _mesa_initialize_buffer_object(&st_obj->Base, name, target);
69 * Deallocate/free a vertex/pixel buffer object.
70 * Called via glDeleteBuffersARB().
73 st_bufferobj_free(struct gl_context *ctx, struct gl_buffer_object *obj)
75 struct st_buffer_object *st_obj = st_buffer_object(obj);
77 assert(obj->RefCount == 0);
78 assert(st_obj->transfer == NULL);
81 pipe_resource_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(struct gl_context *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 /* Now that transfers are per-context, we don't have to figure out
120 * flushing here. Usually drivers won't need to flush in this case
121 * even if the buffer is currently referenced by hardware - they
122 * just queue the upload as dma rather than mapping the underlying
125 pipe_buffer_write(st_context(ctx)->pipe,
132 * Called via glGetBufferSubDataARB().
135 st_bufferobj_get_subdata(struct gl_context *ctx,
139 GLvoid * data, struct gl_buffer_object *obj)
141 struct st_buffer_object *st_obj = st_buffer_object(obj);
143 /* we may be called from VBO code, so double-check params here */
146 ASSERT(offset + size <= obj->Size);
151 pipe_buffer_read(st_context(ctx)->pipe, st_obj->buffer,
157 * Allocate space for and store data in a buffer object. Any data that was
158 * previously stored in the buffer object is lost. If data is NULL,
159 * memory will be allocated, but no copy will occur.
160 * Called via ctx->Driver.BufferData().
161 * \return GL_TRUE for success, GL_FALSE if out of memory
164 st_bufferobj_data(struct gl_context *ctx,
169 struct gl_buffer_object *obj)
171 struct st_context *st = st_context(ctx);
172 struct pipe_context *pipe = st->pipe;
173 struct st_buffer_object *st_obj = st_buffer_object(obj);
174 unsigned bind, pipe_usage;
176 st_obj->Base.Size = size;
177 st_obj->Base.Usage = usage;
180 case GL_PIXEL_PACK_BUFFER_ARB:
181 case GL_PIXEL_UNPACK_BUFFER_ARB:
182 bind = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
184 case GL_ARRAY_BUFFER_ARB:
185 bind = PIPE_BIND_VERTEX_BUFFER;
187 case GL_ELEMENT_ARRAY_BUFFER_ARB:
188 bind = PIPE_BIND_INDEX_BUFFER;
198 pipe_usage = PIPE_USAGE_STATIC;
200 case GL_DYNAMIC_DRAW:
201 case GL_DYNAMIC_READ:
202 case GL_DYNAMIC_COPY:
203 pipe_usage = PIPE_USAGE_DYNAMIC;
208 pipe_usage = PIPE_USAGE_STREAM;
211 pipe_usage = PIPE_USAGE_DEFAULT;
214 pipe_resource_reference( &st_obj->buffer, NULL );
217 st_obj->buffer = pipe_buffer_create(pipe->screen, bind,
220 if (!st_obj->buffer) {
225 pipe_buffer_write(pipe, st_obj->buffer, 0, size, data);
234 * Dummy data whose's pointer is used for zero size buffers or ranges.
236 static long st_bufferobj_zero_length = 0;
241 * Called via glMapBufferARB().
244 st_bufferobj_map(struct gl_context *ctx, GLenum target, GLenum access,
245 struct gl_buffer_object *obj)
247 struct st_buffer_object *st_obj = st_buffer_object(obj);
252 flags = PIPE_TRANSFER_WRITE;
255 flags = PIPE_TRANSFER_READ;
259 flags = PIPE_TRANSFER_READ_WRITE;
263 /* Handle zero-size buffers here rather than in drivers */
264 if (obj->Size == 0) {
265 obj->Pointer = &st_bufferobj_zero_length;
268 obj->Pointer = pipe_buffer_map(st_context(ctx)->pipe,
276 obj->Length = obj->Size;
283 * Called via glMapBufferRange().
286 st_bufferobj_map_range(struct gl_context *ctx, GLenum target,
287 GLintptr offset, GLsizeiptr length, GLbitfield access,
288 struct gl_buffer_object *obj)
290 struct pipe_context *pipe = st_context(ctx)->pipe;
291 struct st_buffer_object *st_obj = st_buffer_object(obj);
292 enum pipe_transfer_usage flags = 0x0;
294 if (access & GL_MAP_WRITE_BIT)
295 flags |= PIPE_TRANSFER_WRITE;
297 if (access & GL_MAP_READ_BIT)
298 flags |= PIPE_TRANSFER_READ;
300 if (access & GL_MAP_FLUSH_EXPLICIT_BIT)
301 flags |= PIPE_TRANSFER_FLUSH_EXPLICIT;
303 if (access & GL_MAP_INVALIDATE_BUFFER_BIT) {
304 flags |= PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE;
306 else if (access & GL_MAP_INVALIDATE_RANGE_BIT) {
307 if (offset == 0 && length == obj->Size)
308 flags |= PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE;
310 flags |= PIPE_TRANSFER_DISCARD_RANGE;
313 if (access & GL_MAP_UNSYNCHRONIZED_BIT)
314 flags |= PIPE_TRANSFER_UNSYNCHRONIZED;
316 /* ... other flags ...
319 if (access & MESA_MAP_NOWAIT_BIT)
320 flags |= PIPE_TRANSFER_DONTBLOCK;
324 assert(offset < obj->Size);
325 assert(offset + length <= obj->Size);
328 * We go out of way here to hide the degenerate yet valid case of zero
329 * length range from the pipe driver.
332 obj->Pointer = &st_bufferobj_zero_length;
335 obj->Pointer = pipe_buffer_map_range(pipe,
341 obj->Pointer = (ubyte *) obj->Pointer + offset;
346 obj->Offset = offset;
347 obj->Length = length;
348 obj->AccessFlags = access;
356 st_bufferobj_flush_mapped_range(struct gl_context *ctx, GLenum target,
357 GLintptr offset, GLsizeiptr length,
358 struct gl_buffer_object *obj)
360 struct pipe_context *pipe = st_context(ctx)->pipe;
361 struct st_buffer_object *st_obj = st_buffer_object(obj);
363 /* Subrange is relative to mapped range */
366 assert(offset + length <= obj->Length);
367 assert(obj->Pointer);
372 pipe_buffer_flush_mapped_range(pipe, st_obj->transfer,
373 obj->Offset + offset, length);
378 * Called via glUnmapBufferARB().
381 st_bufferobj_unmap(struct gl_context *ctx, GLenum target, struct gl_buffer_object *obj)
383 struct pipe_context *pipe = st_context(ctx)->pipe;
384 struct st_buffer_object *st_obj = st_buffer_object(obj);
387 pipe_buffer_unmap(pipe, st_obj->transfer);
389 st_obj->transfer = NULL;
398 * Called via glCopyBufferSubData().
401 st_copy_buffer_subdata(struct gl_context *ctx,
402 struct gl_buffer_object *src,
403 struct gl_buffer_object *dst,
404 GLintptr readOffset, GLintptr writeOffset,
407 struct pipe_context *pipe = st_context(ctx)->pipe;
408 struct st_buffer_object *srcObj = st_buffer_object(src);
409 struct st_buffer_object *dstObj = st_buffer_object(dst);
415 /* buffer should not already be mapped */
416 assert(!src->Pointer);
417 assert(!dst->Pointer);
419 u_box_1d(readOffset, size, &box);
421 pipe->resource_copy_region(pipe, dstObj->buffer, 0, writeOffset, 0, 0,
422 srcObj->buffer, 0, &box);
426 /* TODO: if buffer wasn't created with appropriate usage flags, need
427 * to recreate it now and copy contents -- or possibly create a
428 * gallium entrypoint to extend the usage flags and let the driver
429 * decide if a copy is necessary.
432 st_bufferobj_validate_usage(struct st_context *st,
433 struct st_buffer_object *obj,
440 st_init_bufferobject_functions(struct dd_function_table *functions)
442 functions->NewBufferObject = st_bufferobj_alloc;
443 functions->DeleteBuffer = st_bufferobj_free;
444 functions->BufferData = st_bufferobj_data;
445 functions->BufferSubData = st_bufferobj_subdata;
446 functions->GetBufferSubData = st_bufferobj_get_subdata;
447 functions->MapBuffer = st_bufferobj_map;
448 functions->MapBufferRange = st_bufferobj_map_range;
449 functions->FlushMappedBufferRange = st_bufferobj_flush_mapped_range;
450 functions->UnmapBuffer = st_bufferobj_unmap;
451 functions->CopyBufferSubData = st_copy_buffer_subdata;
453 /* For GL_APPLE_vertex_array_object */
454 functions->NewArrayObject = _mesa_new_array_object;
455 functions->DeleteArrayObject = _mesa_delete_array_object;