draw_prim_assembler.h

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/*
 * Input assembler needs to be able to decompose adjacency primitives
 * into something that can be understood by the rest of the pipeline.
 * The specs say that the adjacency primitives are *only* visible
 * in the geometry shader, for everything else they need to be
 * decomposed. Which in most of the cases is not an issue, because the
 * geometry shader always decomposes them for us, but without geometry
 * shader we were passing unchanged adjacency primitives to the
 * rest of the pipeline and causing crashes everywhere.
 * If geometry shader is missing and the input primitive is one of 
 * the adjacency primitives we use the code from this file to
 * decompose them into something that the rest of the pipeline can 
 * understand.
 * 
 */

#ifndef DRAW_PRIM_ASSEMBLER_H
#define DRAW_PRIM_ASSEMBLER_H

#include "draw/draw_private.h"

struct draw_assembler;

struct draw_assembler *
draw_prim_assembler_create(struct draw_context *draw);

void
draw_prim_assembler_destroy(struct draw_assembler *ia);

boolean
draw_prim_assembler_is_required(const struct draw_context *draw,
                                const struct draw_prim_info *prim_info,
                                const struct draw_vertex_info *vert_info);

void
draw_prim_assembler_run(struct draw_context *draw,
                        const struct draw_prim_info *in_prim_info,
                        const struct draw_vertex_info *in_vert_info,
                        struct draw_prim_info *out_prim_info,
                        struct draw_vertex_info *out_vert_info);


void
draw_prim_assembler_prepare_outputs(struct draw_assembler *ia);

void
draw_prim_assembler_new_instance(struct draw_assembler *ia);


#endif