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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;
#define PT_SHADE 0x1
#define PT_CLIPTEST 0x2
#define PT_PIPELINE 0x4
#define PT_MAX_MIDDLE 0x8
/* 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)
*/
struct draw_pt_middle_end {
void (*prepare)( struct draw_pt_middle_end *,
unsigned prim,
unsigned opt,
unsigned *max_vertices );
void (*run)( struct draw_pt_middle_end *,
const unsigned *fetch_elts,
unsigned fetch_count,
const ushort *draw_elts,
unsigned draw_count );
void (*run_linear)(struct draw_pt_middle_end *,
unsigned start,
unsigned count);
/* Transform all vertices in a linear range and then draw them with
* the supplied element list. May fail and return FALSE.
*/
boolean (*run_linear_elts)( struct draw_pt_middle_end *,
unsigned fetch_start,
unsigned fetch_count,
const ushort *draw_elts,
unsigned draw_count );
int (*get_max_vertex_count)( struct draw_pt_middle_end * );
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.
*/
struct vbuf_render;
struct vertex_header;
/* 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 );
/* Frontends:
*
* Currently only the general-purpose vcache implementation, could add
* a special case for tiny vertex buffers.
*/
struct draw_pt_front_end *draw_pt_vcache( struct draw_context *draw );
struct draw_pt_front_end *draw_pt_varray(struct draw_context *draw);
/* Middle-ends:
*
* Currently one general-purpose case which can do all possibilities,
* at the slight expense of creating a vertex_header in some cases
* unecessarily.
*
* The special case fetch_emit code avoids pipeline vertices
* altogether and builds hardware vertices directly from API
* vertex_elements.
*/
struct draw_pt_middle_end *draw_pt_fetch_emit( struct draw_context *draw );
struct draw_pt_middle_end *draw_pt_middle_fse( struct draw_context *draw );
struct draw_pt_middle_end *draw_pt_fetch_pipeline_or_emit(struct draw_context *draw);
/*******************************************************************************
* HW vertex emit:
*/
struct pt_emit;
void draw_pt_emit_prepare( struct pt_emit *emit,
unsigned prim,
unsigned *max_vertices );
void draw_pt_emit( struct pt_emit *emit,
const float (*vertex_data)[4],
unsigned vertex_count,
unsigned stride,
const ushort *elts,
unsigned count );
void draw_pt_emit_linear( struct pt_emit *emit,
const float (*vertex_data)[4],
unsigned stride,
unsigned count );
void draw_pt_emit_destroy( struct pt_emit *emit );
struct pt_emit *draw_pt_emit_create( struct draw_context *draw );
/*******************************************************************************
* API vertex fetch:
*/
struct pt_fetch;
void draw_pt_fetch_prepare( struct pt_fetch *fetch,
unsigned vertex_input_count,
unsigned vertex_size );
void draw_pt_fetch_run( struct pt_fetch *fetch,
const unsigned *elts,
unsigned count,
char *verts );
void draw_pt_fetch_run_linear( struct pt_fetch *fetch,
unsigned start,
unsigned count,
char *verts );
void draw_pt_fetch_destroy( struct pt_fetch *fetch );
struct pt_fetch *draw_pt_fetch_create( struct draw_context *draw );
/*******************************************************************************
* Post-VS: cliptest, rhw, viewport
*/
struct pt_post_vs;
boolean draw_pt_post_vs_run( struct pt_post_vs *pvs,
struct vertex_header *pipeline_verts,
unsigned stride,
unsigned count );
void draw_pt_post_vs_prepare( struct pt_post_vs *pvs,
boolean bypass_clipping,
boolean bypass_viewport,
boolean opengl );
struct pt_post_vs *draw_pt_post_vs_create( struct draw_context *draw );
void draw_pt_post_vs_destroy( struct pt_post_vs *pvs );
/*******************************************************************************
* Utils:
*/
void draw_pt_split_prim(unsigned prim, unsigned *first, unsigned *incr);
#endif
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