/**************************************************************************
*
* 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_context.h"
#include "st_cb_bufferobjects.h"
#include "pipe/p_context.h"
#include "pipe/p_defines.h"
#include "util/u_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(struct gl_context *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(ctx, &st_obj->Base, name, target);
return &st_obj->Base;
}
/**
* Deallocate/free a vertex/pixel buffer object.
* Called via glDeleteBuffersARB().
*/
static void
st_bufferobj_free(struct gl_context *ctx, struct gl_buffer_object *obj)
{
struct st_buffer_object *st_obj = st_buffer_object(obj);
assert(obj->RefCount == 0);
assert(st_obj->transfer == NULL);
if (st_obj->buffer)
pipe_resource_reference(&st_obj->buffer, NULL);
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(struct gl_context *ctx,
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);
if (!size)
return;
/*
* According to ARB_vertex_buffer_object specification, if data is null,
* then the contents of the buffer object's data store is undefined. We just
* ignore, and leave it unchanged.
*/
if (!data)
return;
if (!st_obj->buffer) {
/* we probably ran out of memory during buffer allocation */
return;
}
/* Now that transfers are per-context, we don't have to figure out
* flushing here. Usually drivers won't need to flush in this case
* even if the buffer is currently referenced by hardware - they
* just queue the upload as dma rather than mapping the underlying
* buffer directly.
*/
pipe_buffer_write(st_context(ctx)->pipe,
st_obj->buffer,
offset, size, data);
}
/**
* Called via glGetBufferSubDataARB().
*/
static void
st_bufferobj_get_subdata(struct gl_context *ctx,
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);
if (!size)
return;
if (!st_obj->buffer) {
/* we probably ran out of memory during buffer allocation */
return;
}
pipe_buffer_read(st_context(ctx)->pipe, 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(struct gl_context *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 bind, pipe_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:
bind = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
break;
case GL_ARRAY_BUFFER_ARB:
bind = PIPE_BIND_VERTEX_BUFFER;
break;
case GL_ELEMENT_ARRAY_BUFFER_ARB:
bind = PIPE_BIND_INDEX_BUFFER;
break;
case GL_TRANSFORM_FEEDBACK_BUFFER:
bind = PIPE_BIND_STREAM_OUTPUT;
break;
default:
bind = 0;
}
switch (usage) {
case GL_STATIC_DRAW:
case GL_STATIC_READ:
case GL_STATIC_COPY:
pipe_usage = PIPE_USAGE_STATIC;
break;
case GL_DYNAMIC_DRAW:
case GL_DYNAMIC_READ:
case GL_DYNAMIC_COPY:
pipe_usage = PIPE_USAGE_DYNAMIC;
break;
case GL_STREAM_DRAW:
case GL_STREAM_READ:
case GL_STREAM_COPY:
pipe_usage = PIPE_USAGE_STREAM;
break;
default:
pipe_usage = PIPE_USAGE_DEFAULT;
}
pipe_resource_reference( &st_obj->buffer, NULL );
if (size != 0) {
st_obj->buffer = pipe_buffer_create(pipe->screen, bind,
pipe_usage, size);
if (!st_obj->buffer) {
/* out of memory */
st_obj->Base.Size = 0;
return GL_FALSE;
}
if (data)
pipe_buffer_write(pipe, st_obj->buffer, 0, size, data);
return GL_TRUE;
}
return GL_TRUE;
}
/**
* Called via glMapBufferRange().
*/
static void *
st_bufferobj_map_range(struct gl_context *ctx,
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);
enum pipe_transfer_usage flags = 0x0;
if (access & GL_MAP_WRITE_BIT)
flags |= PIPE_TRANSFER_WRITE;
if (access & GL_MAP_READ_BIT)
flags |= PIPE_TRANSFER_READ;
if (access & GL_MAP_FLUSH_EXPLICIT_BIT)
flags |= PIPE_TRANSFER_FLUSH_EXPLICIT;
if (access & GL_MAP_INVALIDATE_BUFFER_BIT) {
flags |= PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE;
}
else if (access & GL_MAP_INVALIDATE_RANGE_BIT) {
if (offset == 0 && length == obj->Size)
flags |= PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE;
else
flags |= PIPE_TRANSFER_DISCARD_RANGE;
}
if (access & GL_MAP_UNSYNCHRONIZED_BIT)
flags |= PIPE_TRANSFER_UNSYNCHRONIZED;
/* ... other flags ...
*/
if (access & MESA_MAP_NOWAIT_BIT)
flags |= PIPE_TRANSFER_DONTBLOCK;
assert(offset >= 0);
assert(length >= 0);
assert(offset < obj->Size);
assert(offset + length <= obj->Size);
obj->Pointer = pipe_buffer_map_range(pipe,
st_obj->buffer,
offset, length,
flags,
&st_obj->transfer);
if (obj->Pointer) {
obj->Offset = offset;
obj->Length = length;
obj->AccessFlags = access;
}
return obj->Pointer;
}
static void
st_bufferobj_flush_mapped_range(struct gl_context *ctx,
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);
assert(obj->Pointer);
if (!length)
return;
pipe_buffer_flush_mapped_range(pipe, st_obj->transfer,
obj->Offset + offset, length);
}
/**
* Called via glUnmapBufferARB().
*/
static GLboolean
st_bufferobj_unmap(struct gl_context *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 (obj->Length)
pipe_buffer_unmap(pipe, st_obj->transfer);
st_obj->transfer = NULL;
obj->Pointer = NULL;
obj->Offset = 0;
obj->Length = 0;
return GL_TRUE;
}
/**
* Called via glCopyBufferSubData().
*/
static void
st_copy_buffer_subdata(struct gl_context *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);
struct pipe_box box;
if(!size)
return;
/* buffer should not already be mapped */
assert(!src->Pointer);
assert(!dst->Pointer);
u_box_1d(readOffset, size, &box);
pipe->resource_copy_region(pipe, dstObj->buffer, 0, writeOffset, 0, 0,
srcObj->buffer, 0, &box);
}
/* TODO: if buffer wasn't created with appropriate usage flags, need
* to recreate it now and copy contents -- or possibly create a
* gallium entrypoint to extend the usage flags and let the driver
* decide if a copy is necessary.
*/
void
st_bufferobj_validate_usage(struct st_context *st,
struct st_buffer_object *obj,
unsigned usage)
{
}
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->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;
}