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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_PIPE_H
#define DRAW_PIPE_H
#include "pipe/p_compiler.h"
#include "draw_private.h" /* for sizeof(vertex_header) */
#include "draw_context.h"
/**
* Basic info for a point/line/triangle primitive.
*/
struct prim_header {
float det; /**< front/back face determinant */
ushort flags;
ushort pad;
struct vertex_header *v[3]; /**< 1 to 3 vertex pointers */
};
/**
* Base class for all primitive drawing stages.
*/
struct draw_stage
{
struct draw_context *draw; /**< parent context */
struct draw_stage *next; /**< next stage in pipeline */
const char *name; /**< for debugging */
struct vertex_header **tmp; /**< temp vert storage, such as for clipping */
unsigned nr_tmps;
void (*point)( struct draw_stage *,
struct prim_header * );
void (*line)( struct draw_stage *,
struct prim_header * );
void (*tri)( struct draw_stage *,
struct prim_header * );
void (*flush)( struct draw_stage *,
unsigned flags );
void (*reset_stipple_counter)( struct draw_stage * );
void (*destroy)( struct draw_stage * );
};
extern struct draw_stage *draw_unfilled_stage( struct draw_context *context );
extern struct draw_stage *draw_twoside_stage( struct draw_context *context );
extern struct draw_stage *draw_offset_stage( struct draw_context *context );
extern struct draw_stage *draw_clip_stage( struct draw_context *context );
extern struct draw_stage *draw_flatshade_stage( struct draw_context *context );
extern struct draw_stage *draw_cull_stage( struct draw_context *context );
extern struct draw_stage *draw_stipple_stage( struct draw_context *context );
extern struct draw_stage *draw_wide_line_stage( struct draw_context *context );
extern struct draw_stage *draw_wide_point_stage( struct draw_context *context );
extern struct draw_stage *draw_validate_stage( struct draw_context *context );
extern struct draw_stage *draw_ia_stage(struct draw_context *context);
boolean draw_ia_stage_required(const struct draw_context *context,
unsigned prim);
extern void draw_free_temp_verts( struct draw_stage *stage );
extern boolean draw_alloc_temp_verts( struct draw_stage *stage, unsigned nr );
extern void draw_reset_vertex_ids( struct draw_context *draw );
void draw_pipe_passthrough_tri(struct draw_stage *stage, struct prim_header *header);
void draw_pipe_passthrough_line(struct draw_stage *stage, struct prim_header *header);
void draw_pipe_passthrough_point(struct draw_stage *stage, struct prim_header *header);
void draw_unfilled_prepare_outputs(struct draw_context *context,
struct draw_stage *stage);
void draw_ia_prepare_outputs(struct draw_context *context,
struct draw_stage *stage);
/**
* Get a writeable copy of a vertex.
* \param stage drawing stage info
* \param vert the vertex to copy (source)
* \param idx index into stage's tmp[] array to put the copy (dest)
* \return pointer to the copied vertex
*/
static INLINE struct vertex_header *
dup_vert( struct draw_stage *stage,
const struct vertex_header *vert,
unsigned idx )
{
struct vertex_header *tmp = stage->tmp[idx];
const uint vsize = sizeof(struct vertex_header)
+ draw_num_shader_outputs(stage->draw) * 4 * sizeof(float);
memcpy(tmp, vert, vsize);
tmp->vertex_id = UNDEFINED_VERTEX_ID;
return tmp;
}
#endif
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