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/**************************************************************************
*
* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
#include "main/imports.h"
#include "main/mtypes.h"
#include "main/bufferobj.h"
#include "st_context.h"
#include "st_cb_bufferobjects.h"
#include "pipe/p_context.h"
#include "pipe/p_defines.h"
#include "pipe/p_winsys.h"
/* Pixel buffers and Vertex/index buffers are handled through these
* mesa callbacks. Framebuffer/Renderbuffer objects are
* created/managed elsewhere.
*/
/**
* There is some duplication between mesa's bufferobjects and our
* bufmgr buffers. Both have an integer handle and a hashtable to
* lookup an opaque structure. It would be nice if the handles and
* internal structure where somehow shared.
*/
static struct gl_buffer_object *
st_bufferobj_alloc(GLcontext *ctx, GLuint name, GLenum target)
{
struct st_context *st = st_context(ctx);
struct st_buffer_object *st_obj = CALLOC_STRUCT(st_buffer_object);
if (!st_obj)
return NULL;
_mesa_initialize_buffer_object(&st_obj->Base, name, target);
st_obj->buffer = st->pipe->winsys->buffer_create( st->pipe->winsys, 32 );
return &st_obj->Base;
}
/**
* Deallocate/free a vertex/pixel buffer object.
* Called via glDeleteBuffersARB().
*/
static void
st_bufferobj_free(GLcontext *ctx, struct gl_buffer_object *obj)
{
struct pipe_context *pipe = st_context(ctx)->pipe;
struct st_buffer_object *st_obj = st_buffer_object(obj);
if (st_obj->buffer)
pipe->winsys->buffer_unreference(pipe->winsys, &st_obj->buffer);
free(st_obj);
}
/**
* Allocate space for and store data in a buffer object. Any data that was
* previously stored in the buffer object is lost. If data is NULL,
* memory will be allocated, but no copy will occur.
* Called via glBufferDataARB().
*/
static void
st_bufferobj_data(GLcontext *ctx,
GLenum target,
GLsizeiptrARB size,
const GLvoid * data,
GLenum usage,
struct gl_buffer_object *obj)
{
struct pipe_context *pipe = st_context(ctx)->pipe;
struct st_buffer_object *st_obj = st_buffer_object(obj);
st_obj->Base.Size = size;
st_obj->Base.Usage = usage;
pipe->winsys->buffer_data( pipe->winsys, st_obj->buffer, size, data );
}
/**
* Replace data in a subrange of buffer object. If the data range
* specified by size + offset extends beyond the end of the buffer or
* if data is NULL, no copy is performed.
* Called via glBufferSubDataARB().
*/
static void
st_bufferobj_subdata(GLcontext *ctx,
GLenum target,
GLintptrARB offset,
GLsizeiptrARB size,
const GLvoid * data, struct gl_buffer_object *obj)
{
struct pipe_context *pipe = st_context(ctx)->pipe;
struct st_buffer_object *st_obj = st_buffer_object(obj);
pipe->winsys->buffer_subdata(pipe->winsys, st_obj->buffer, offset, size, data);
}
/**
* Called via glGetBufferSubDataARB().
*/
static void
st_bufferobj_get_subdata(GLcontext *ctx,
GLenum target,
GLintptrARB offset,
GLsizeiptrARB size,
GLvoid * data, struct gl_buffer_object *obj)
{
struct pipe_context *pipe = st_context(ctx)->pipe;
struct st_buffer_object *st_obj = st_buffer_object(obj);
pipe->winsys->buffer_get_subdata(pipe->winsys, st_obj->buffer, offset, size, data);
}
/**
* Called via glMapBufferARB().
*/
static void *
st_bufferobj_map(GLcontext *ctx, GLenum target, GLenum access,
struct gl_buffer_object *obj)
{
struct pipe_context *pipe = st_context(ctx)->pipe;
struct st_buffer_object *st_obj = st_buffer_object(obj);
GLuint flags;
switch (access) {
case GL_WRITE_ONLY:
flags = PIPE_BUFFER_FLAG_WRITE;
break;
case GL_READ_ONLY:
flags = PIPE_BUFFER_FLAG_READ;
break;
case GL_READ_WRITE:
/* fall-through */
default:
flags = PIPE_BUFFER_FLAG_READ | PIPE_BUFFER_FLAG_WRITE;
break;
}
obj->Pointer = pipe->winsys->buffer_map(pipe->winsys, st_obj->buffer, flags);
return obj->Pointer;
}
/**
* Called via glMapBufferARB().
*/
static GLboolean
st_bufferobj_unmap(GLcontext *ctx, GLenum target, struct gl_buffer_object *obj)
{
struct pipe_context *pipe = st_context(ctx)->pipe;
struct st_buffer_object *st_obj = st_buffer_object(obj);
pipe->winsys->buffer_unmap(pipe->winsys, st_obj->buffer);
obj->Pointer = NULL;
return GL_TRUE;
}
void
st_init_bufferobject_functions(struct dd_function_table *functions)
{
functions->NewBufferObject = st_bufferobj_alloc;
functions->DeleteBuffer = st_bufferobj_free;
functions->BufferData = st_bufferobj_data;
functions->BufferSubData = st_bufferobj_subdata;
functions->GetBufferSubData = st_bufferobj_get_subdata;
functions->MapBuffer = st_bufferobj_map;
functions->UnmapBuffer = st_bufferobj_unmap;
}
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