253 lines
8.3 KiB
C
253 lines
8.3 KiB
C
/**************************************************************************
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*
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* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/*
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* Authors:
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* Keith Whitwell <keith@tungstengraphics.com>
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*/
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#ifndef DRAW_PT_H
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#define DRAW_PT_H
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#include "pipe/p_compiler.h"
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struct draw_pt_middle_end;
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struct draw_context;
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struct draw_prim_info;
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struct draw_vertex_info;
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#define PT_SHADE 0x1
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#define PT_CLIPTEST 0x2
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#define PT_PIPELINE 0x4
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#define PT_MAX_MIDDLE 0x8
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/* The "front end" - prepare sets of fetch, draw elements for the
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* middle end.
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*
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* The fetch elements are indices to the vertices. The draw elements are
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* indices to the fetched vertices. When both arrays of elements are both
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* linear, middle->run_linear is called; When only the fetch elements are
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* linear, middle->run_linear_elts is called; Otherwise, middle->run is
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* called.
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*
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* When the number of the draw elements exceeds max_vertex of the middle end,
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* the draw elements (as well as the fetch elements) are splitted and the
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* middle end is called multiple times.
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*
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* Currenly there is:
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* - vsplit - catchall implementation, splits big prims
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*/
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struct draw_pt_front_end {
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void (*prepare)( struct draw_pt_front_end *,
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unsigned prim,
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struct draw_pt_middle_end *,
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unsigned opt );
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void (*run)( struct draw_pt_front_end *,
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unsigned start,
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unsigned count );
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void (*flush)( struct draw_pt_front_end *, unsigned flags );
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void (*destroy)( struct draw_pt_front_end * );
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};
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/* The "middle end" - prepares actual hardware vertices for the
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* hardware backend.
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*
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* prim_flags is as defined by pipe_draw_info::flags.
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*
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* Currently two versions of this:
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* - fetch, vertex shade, cliptest, prim-pipeline
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* - fetch, emit (ie passthrough)
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*/
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struct draw_pt_middle_end {
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void (*prepare)( struct draw_pt_middle_end *,
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unsigned prim,
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unsigned opt,
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unsigned *max_vertices );
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/**
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* Bind/update parameter state such as constants, viewport dims
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* and clip planes. Basically, stuff which isn't "baked" into the
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* shader or pipeline state.
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*/
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void (*bind_parameters)(struct draw_pt_middle_end *);
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void (*run)( struct draw_pt_middle_end *,
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const unsigned *fetch_elts,
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unsigned fetch_count,
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const ushort *draw_elts,
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unsigned draw_count,
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unsigned prim_flags );
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void (*run_linear)(struct draw_pt_middle_end *,
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unsigned start,
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unsigned count,
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unsigned prim_flags );
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/* Transform all vertices in a linear range and then draw them with
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* the supplied element list. May fail and return FALSE.
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*/
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boolean (*run_linear_elts)( struct draw_pt_middle_end *,
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unsigned fetch_start,
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unsigned fetch_count,
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const ushort *draw_elts,
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unsigned draw_count,
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unsigned prim_flags );
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int (*get_max_vertex_count)( struct draw_pt_middle_end * );
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void (*finish)( struct draw_pt_middle_end * );
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void (*destroy)( struct draw_pt_middle_end * );
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};
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/* The "back end" - supplied by the driver, defined in draw_vbuf.h.
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*/
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struct vbuf_render;
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struct vertex_header;
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/* Frontends:
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*
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* Currently only the general-purpose vsplit implementation.
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*/
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struct draw_pt_front_end *draw_pt_vsplit(struct draw_context *draw);
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/* Middle-ends:
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*
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* Currently one general-purpose case which can do all possibilities,
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* at the slight expense of creating a vertex_header in some cases
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* unecessarily.
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*
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* The special case fetch_emit code avoids pipeline vertices
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* altogether and builds hardware vertices directly from API
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* vertex_elements.
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*/
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struct draw_pt_middle_end *draw_pt_fetch_emit( struct draw_context *draw );
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struct draw_pt_middle_end *draw_pt_middle_fse( struct draw_context *draw );
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struct draw_pt_middle_end *draw_pt_fetch_pipeline_or_emit(struct draw_context *draw);
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struct draw_pt_middle_end *draw_pt_fetch_pipeline_or_emit_llvm(struct draw_context *draw);
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/*******************************************************************************
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* HW vertex emit:
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*/
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struct pt_emit;
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void draw_pt_emit_prepare( struct pt_emit *emit,
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unsigned prim,
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unsigned *max_vertices );
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void draw_pt_emit( struct pt_emit *emit,
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const struct draw_vertex_info *vert_info,
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const struct draw_prim_info *prim_info);
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void draw_pt_emit_linear( struct pt_emit *emit,
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const struct draw_vertex_info *vert_info,
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const struct draw_prim_info *prim_info);
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void draw_pt_emit_destroy( struct pt_emit *emit );
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struct pt_emit *draw_pt_emit_create( struct draw_context *draw );
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/*******************************************************************************
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* HW stream output emit:
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*/
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struct pt_so_emit;
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void draw_pt_so_emit_prepare(struct pt_so_emit *emit, boolean use_pre_clip_pos);
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void draw_pt_so_emit( struct pt_so_emit *emit,
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const struct draw_vertex_info *vert_info,
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const struct draw_prim_info *prim_info );
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void draw_pt_so_emit_destroy( struct pt_so_emit *emit );
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struct pt_so_emit *draw_pt_so_emit_create( struct draw_context *draw );
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/*******************************************************************************
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* API vertex fetch:
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*/
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struct pt_fetch;
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void draw_pt_fetch_prepare( struct pt_fetch *fetch,
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unsigned vertex_input_count,
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unsigned vertex_size,
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unsigned instance_id_index );
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void draw_pt_fetch_run( struct pt_fetch *fetch,
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const unsigned *elts,
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unsigned count,
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char *verts );
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void draw_pt_fetch_run_linear( struct pt_fetch *fetch,
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unsigned start,
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unsigned count,
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char *verts );
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void draw_pt_fetch_destroy( struct pt_fetch *fetch );
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struct pt_fetch *draw_pt_fetch_create( struct draw_context *draw );
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/*******************************************************************************
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* Post-VS: cliptest, rhw, viewport
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*/
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struct pt_post_vs;
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boolean draw_pt_post_vs_run( struct pt_post_vs *pvs,
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struct draw_vertex_info *info,
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const struct draw_prim_info *prim_info );
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void draw_pt_post_vs_prepare( struct pt_post_vs *pvs,
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boolean clip_xy,
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boolean clip_z,
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boolean clip_user,
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boolean guard_band,
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boolean bypass_viewport,
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boolean clip_halfz,
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boolean need_edgeflags );
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struct pt_post_vs *draw_pt_post_vs_create( struct draw_context *draw );
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void draw_pt_post_vs_destroy( struct pt_post_vs *pvs );
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/*******************************************************************************
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* Utils:
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*/
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void draw_pt_split_prim(unsigned prim, unsigned *first, unsigned *incr);
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unsigned draw_pt_trim_count(unsigned count, unsigned first, unsigned incr);
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#endif
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