/**************************************************************************
*
* 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.
*
**************************************************************************/
/**
* Functions for pixel buffer objects and vertex/element buffer objects.
*/
#include "main/imports.h"
#include "main/mtypes.h"
#include "main/arrayobj.h"
#include "main/bufferobj.h"
#include "st_inlines.h"
#include "st_context.h"
#include "st_cb_bufferobjects.h"
#include "pipe/p_context.h"
#include "pipe/p_defines.h"
#include "pipe/p_inlines.h"
/**
* 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_buffer_object *st_obj = ST_CALLOC_STRUCT(st_buffer_object);
if (!st_obj)
return NULL;
_mesa_initialize_buffer_object(&st_obj->Base, name, target);
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 st_buffer_object *st_obj = st_buffer_object(obj);
if (st_obj->buffer)
pipe_buffer_reference(&st_obj->buffer, NULL);
_mesa_free(st_obj);
}
/**
* 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 st_buffer_object *st_obj = st_buffer_object(obj);
/* we may be called from VBO code, so double-check params here */
ASSERT(offset >= 0);
ASSERT(size >= 0);
ASSERT(offset + size <= obj->Size);
st_cond_flush_pipe_buffer_write(st_context(ctx), 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 st_buffer_object *st_obj = st_buffer_object(obj);
/* we may be called from VBO code, so double-check params here */
ASSERT(offset >= 0);
ASSERT(size >= 0);
ASSERT(offset + size <= obj->Size);
st_cond_flush_pipe_buffer_read(st_context(ctx), st_obj->buffer,
offset, size, data);
}
/**
* 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 ctx->Driver.BufferData().
* \return GL_TRUE for success, GL_FALSE if out of memory
*/
static GLboolean
st_bufferobj_data(GLcontext *ctx,
GLenum target,
GLsizeiptrARB size,
const GLvoid * data,
GLenum usage,
struct gl_buffer_object *obj)
{
struct st_context *st = st_context(ctx);
struct pipe_context *pipe = st->pipe;
struct st_buffer_object *st_obj = st_buffer_object(obj);
unsigned buffer_usage;
st_obj->Base.Size = size;
st_obj->Base.Usage = usage;
switch(target) {
case GL_PIXEL_PACK_BUFFER_ARB:
case GL_PIXEL_UNPACK_BUFFER_ARB:
buffer_usage = PIPE_BUFFER_USAGE_PIXEL;
break;
case GL_ARRAY_BUFFER_ARB:
buffer_usage = PIPE_BUFFER_USAGE_VERTEX;
break;
case GL_ELEMENT_ARRAY_BUFFER_ARB:
buffer_usage = PIPE_BUFFER_USAGE_INDEX;
break;
default:
buffer_usage = 0;
}
pipe_buffer_reference( &st_obj->buffer, NULL );
st_obj->buffer = pipe_buffer_create( pipe->screen, 32, buffer_usage, size );
if (!st_obj->buffer) {
return GL_FALSE;
}
if (data)
st_no_flush_pipe_buffer_write(st_context(ctx), st_obj->buffer, 0,
size, data);
return GL_TRUE;
}
/**
* Called via glMapBufferARB().
*/
static void *
st_bufferobj_map(GLcontext *ctx, GLenum target, GLenum access,
struct gl_buffer_object *obj)
{
struct st_buffer_object *st_obj = st_buffer_object(obj);
uint flags;
switch (access) {
case GL_WRITE_ONLY:
flags = PIPE_BUFFER_USAGE_CPU_WRITE;
break;
case GL_READ_ONLY:
flags = PIPE_BUFFER_USAGE_CPU_READ;
break;
case GL_READ_WRITE:
/* fall-through */
default:
flags = PIPE_BUFFER_USAGE_CPU_READ | PIPE_BUFFER_USAGE_CPU_WRITE;
break;
}
obj->Pointer = st_cond_flush_pipe_buffer_map(st_context(ctx),
st_obj->buffer,
flags);
if (obj->Pointer) {
obj->Offset = 0;
obj->Length = obj->Size;
}
return obj->Pointer;
}
/**
* Called via glMapBufferRange().
*/
static void *
st_bufferobj_map_range(GLcontext *ctx, GLenum target,
GLintptr offset, GLsizeiptr length, GLbitfield access,
struct gl_buffer_object *obj)
{
struct pipe_context *pipe = st_context(ctx)->pipe;
struct st_buffer_object *st_obj = st_buffer_object(obj);
uint flags = 0x0;
if (access & GL_MAP_WRITE_BIT)
flags |= PIPE_BUFFER_USAGE_CPU_WRITE;
if (access & GL_MAP_READ_BIT)
flags |= PIPE_BUFFER_USAGE_CPU_READ;
if (access & GL_MAP_FLUSH_EXPLICIT_BIT)
flags |= PIPE_BUFFER_USAGE_FLUSH_EXPLICIT;
if (access & GL_MAP_UNSYNCHRONIZED_BIT)
flags |= PIPE_BUFFER_USAGE_UNSYNCHRONIZED;
/* ... other flags ...
*/
if (access & MESA_MAP_NOWAIT_BIT)
flags |= PIPE_BUFFER_USAGE_DONTBLOCK;
assert(offset >= 0);
assert(length >= 0);
assert(offset < obj->Size);
assert(offset + length <= obj->Size);
obj->Pointer = pipe_buffer_map_range(pipe->screen, st_obj->buffer, offset, length, flags);
if (obj->Pointer) {
obj->Pointer = (ubyte *) obj->Pointer + offset;
obj->Offset = offset;
obj->Length = length;
obj->AccessFlags = access;
}
return obj->Pointer;
}
static void
st_bufferobj_flush_mapped_range(GLcontext *ctx, GLenum target,
GLintptr offset, GLsizeiptr length,
struct gl_buffer_object *obj)
{
struct pipe_context *pipe = st_context(ctx)->pipe;
struct st_buffer_object *st_obj = st_buffer_object(obj);
/* Subrange is relative to mapped range */
assert(offset >= 0);
assert(length >= 0);
assert(offset + length <= obj->Length);
pipe_buffer_flush_mapped_range(pipe->screen, st_obj->buffer,
obj->Offset + offset, length);
}
/**
* Called via glUnmapBufferARB().
*/
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_buffer_unmap(pipe->screen, st_obj->buffer);
obj->Pointer = NULL;
obj->Offset = 0;
obj->Length = 0;
return GL_TRUE;
}
/**
* Called via glCopyBufferSubData().
*/
static void
st_copy_buffer_subdata(GLcontext *ctx,
struct gl_buffer_object *src,
struct gl_buffer_object *dst,
GLintptr readOffset, GLintptr writeOffset,
GLsizeiptr size)
{
struct pipe_context *pipe = st_context(ctx)->pipe;
struct st_buffer_object *srcObj = st_buffer_object(src);
struct st_buffer_object *dstObj = st_buffer_object(dst);
ubyte *srcPtr, *dstPtr;
/* buffer should not already be mapped */
assert(!src->Pointer);
assert(!dst->Pointer);
srcPtr = (ubyte *) pipe_buffer_map_range(pipe->screen,
srcObj->buffer,
readOffset, size,
PIPE_BUFFER_USAGE_CPU_READ);
dstPtr = (ubyte *) pipe_buffer_map_range(pipe->screen,
dstObj->buffer,
writeOffset, size,
PIPE_BUFFER_USAGE_CPU_WRITE);
if (srcPtr && dstPtr)
_mesa_memcpy(dstPtr + writeOffset, srcPtr + readOffset, size);
pipe_buffer_unmap(pipe->screen, srcObj->buffer);
pipe_buffer_unmap(pipe->screen, dstObj->buffer);
}
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->MapBufferRange = st_bufferobj_map_range;
functions->FlushMappedBufferRange = st_bufferobj_flush_mapped_range;
functions->UnmapBuffer = st_bufferobj_unmap;
functions->CopyBufferSubData = st_copy_buffer_subdata;
/* For GL_APPLE_vertex_array_object */
functions->NewArrayObject = _mesa_new_array_object;
functions->DeleteArrayObject = _mesa_delete_array_object;
}