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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.
*
**************************************************************************/
/**
* \file
* Vertex buffer drawing stage.
*
* \author Keith Whitwell <keith@tungstengraphics.com>
* \author Jose Fonseca <jrfonsec@tungstengraphics.com>
*/
#ifndef DRAW_VBUF_H_
#define DRAW_VBUF_H_
#include "pipe/p_compiler.h"
struct pipe_rasterizer_state;
struct draw_context;
struct vertex_info;
/**
* Interface for hardware vertex buffer rendering.
*/
struct vbuf_render {
/**
* Driver limits. May be tuned lower to improve cache hits on
* index list.
*/
unsigned max_indices;
unsigned max_vertex_buffer_bytes;
/**
* Query if the hardware driver needs assistance for a particular
* combination of rasterizer state and primitive.
*
* Currently optional.
*/
boolean (*need_pipeline)(const struct vbuf_render *render,
const struct pipe_rasterizer_state *rasterizer,
unsigned int prim );
/**
* Get the hardware vertex format.
*
* XXX: have this in draw_context instead?
*/
const struct vertex_info *(*get_vertex_info)( struct vbuf_render * );
/**
* Request a destination for vertices.
* Hardware renderers will use ttm memory, others will just malloc
* something.
*/
boolean (*allocate_vertices)( struct vbuf_render *,
ushort vertex_size,
ushort nr_vertices );
void *(*map_vertices)( struct vbuf_render * );
void (*unmap_vertices)( struct vbuf_render *,
ushort min_index,
ushort max_index );
/**
* Notify the renderer of the current primitive when it changes.
* Must succeed for TRIANGLES, LINES and POINTS. Other prims at
* the discretion of the driver, for the benefit of the passthrough
* path.
*/
void (*set_primitive)( struct vbuf_render *, unsigned prim );
/**
* Draw indexed primitives. Note that indices are ushort. The driver
* must complete this call, if necessary splitting the index list itself.
*/
void (*draw_elements)( struct vbuf_render *,
const ushort *indices,
uint nr_indices );
/* Draw non-indexed primitives.
*/
void (*draw_arrays)( struct vbuf_render *,
unsigned start,
uint nr );
/**
* Called when vbuf is done with this set of vertices:
*/
void (*release_vertices)( struct vbuf_render * );
void (*destroy)( struct vbuf_render * );
/**
* Called after writing data to the stream out buffers
*/
void (*set_stream_output_info)( struct vbuf_render *vbufr,
unsigned primitive_count,
unsigned vertices_count );
};
struct draw_stage *
draw_vbuf_stage( struct draw_context *draw,
struct vbuf_render *render );
#endif /*DRAW_VBUF_H_*/
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