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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.
*
**************************************************************************/
/*
* Authors:
* Keith Whitwell <keith@tungstengraphics.com>
*/
#ifndef DRAW_PT_H
#define DRAW_PT_H
#include "pipe/p_compiler.h"
typedef unsigned (*pt_elt_func)( const void *elts, unsigned idx );
struct draw_pt_middle_end;
struct draw_context;
/* We use the top couple of bits in the vertex fetch index to convey a
* little API information. This limits the number of vertices we can
* address to only 1 billion -- if that becomes a problem, these could
* be moved out & passed separately.
*/
#define DRAW_PT_EDGEFLAG (1<<30)
#define DRAW_PT_RESET_STIPPLE (1<<31)
#define DRAW_PT_FLAG_MASK (3<<30)
/* The "front end" - prepare sets of fetch, draw elements for the
* middle end.
*
* Currenly one version of this:
* - vcache - catchall implementation, decomposes to TRI/LINE/POINT prims
* Later:
* - varray, varray_split
* - velement, velement_split
*
* Currenly only using the vcache version.
*/
struct draw_pt_front_end {
void (*prepare)( struct draw_pt_front_end *,
unsigned prim,
struct draw_pt_middle_end *,
unsigned opt );
void (*run)( struct draw_pt_front_end *,
pt_elt_func elt_func,
const void *elt_ptr,
unsigned count );
void (*finish)( struct draw_pt_front_end * );
void (*destroy)( struct draw_pt_front_end * );
};
/* The "middle end" - prepares actual hardware vertices for the
* hardware backend.
*
* Currently two versions of this:
* - fetch, vertex shade, cliptest, prim-pipeline
* - fetch, emit (ie passthrough)
* Later:
* - fetch, vertex shade, cliptest, maybe-pipeline, maybe-emit
* - fetch, vertex shade, emit
*
* Currenly only using the passthrough version.
*/
struct draw_pt_middle_end {
void (*prepare)( struct draw_pt_middle_end *,
unsigned prim,
unsigned opt );
void (*run)( struct draw_pt_middle_end *,
const unsigned *fetch_elts,
unsigned fetch_count,
const ushort *draw_elts,
unsigned draw_count );
void (*finish)( struct draw_pt_middle_end * );
void (*destroy)( struct draw_pt_middle_end * );
};
/* The "back end" - supplied by the driver, defined in draw_vbuf.h.
*
* Not sure whether to wrap the prim pipeline up as an alternate
* backend. Would be a win for everything except pure passthrough
* mode...
*/
struct vbuf_render;
/* Helper functions.
*/
pt_elt_func draw_pt_elt_func( struct draw_context *draw );
const void *draw_pt_elt_ptr( struct draw_context *draw,
unsigned start );
/* Implementations:
*/
struct draw_pt_front_end *draw_pt_vcache( struct draw_context *draw );
struct draw_pt_middle_end *draw_pt_fetch_emit( struct draw_context *draw );
struct draw_pt_middle_end *draw_pt_fetch_pipeline( struct draw_context *draw );
struct draw_pt_middle_end *draw_pt_fetch_pipeline_or_emit(struct draw_context *draw);
/* More helpers:
*/
void draw_pt_run_pipeline( struct draw_context *draw,
unsigned prim,
char *verts,
unsigned vertex_stride,
unsigned vertex_count,
const ushort *elts,
unsigned count );
/* HW vertex emit:
*/
struct pt_emit;
void draw_pt_emit_prepare( struct pt_emit *emit,
unsigned prim,
unsigned opt );
void draw_pt_emit( struct pt_emit *emit,
char *verts,
unsigned stride,
unsigned vertex_count,
const ushort *elts,
unsigned count );
void draw_pt_emit_destroy( struct pt_emit *emit );
struct pt_emit *draw_pt_emit_create( struct draw_context *draw );
#endif
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