forked from KolibriOS/kolibrios
353 lines
11 KiB
C
353 lines
11 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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#include "draw/draw_private.h"
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#include "draw/draw_pipe.h"
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#include "util/u_debug.h"
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#include "util/u_math.h"
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boolean draw_pipeline_init( struct draw_context *draw )
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{
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/* create pipeline stages */
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draw->pipeline.wide_line = draw_wide_line_stage( draw );
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draw->pipeline.wide_point = draw_wide_point_stage( draw );
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draw->pipeline.stipple = draw_stipple_stage( draw );
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draw->pipeline.unfilled = draw_unfilled_stage( draw );
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draw->pipeline.twoside = draw_twoside_stage( draw );
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draw->pipeline.offset = draw_offset_stage( draw );
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draw->pipeline.clip = draw_clip_stage( draw );
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draw->pipeline.flatshade = draw_flatshade_stage( draw );
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draw->pipeline.cull = draw_cull_stage( draw );
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draw->pipeline.validate = draw_validate_stage( draw );
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draw->pipeline.first = draw->pipeline.validate;
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if (!draw->pipeline.wide_line ||
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!draw->pipeline.wide_point ||
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!draw->pipeline.stipple ||
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!draw->pipeline.unfilled ||
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!draw->pipeline.twoside ||
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!draw->pipeline.offset ||
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!draw->pipeline.clip ||
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!draw->pipeline.flatshade ||
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!draw->pipeline.cull ||
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!draw->pipeline.validate)
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return FALSE;
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/* these defaults are oriented toward the needs of softpipe */
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draw->pipeline.wide_point_threshold = 1000000.0f; /* infinity */
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draw->pipeline.wide_line_threshold = 1.0f;
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draw->pipeline.wide_point_sprites = FALSE;
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draw->pipeline.line_stipple = TRUE;
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draw->pipeline.point_sprite = TRUE;
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return TRUE;
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}
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void draw_pipeline_destroy( struct draw_context *draw )
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{
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if (draw->pipeline.wide_line)
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draw->pipeline.wide_line->destroy( draw->pipeline.wide_line );
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if (draw->pipeline.wide_point)
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draw->pipeline.wide_point->destroy( draw->pipeline.wide_point );
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if (draw->pipeline.stipple)
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draw->pipeline.stipple->destroy( draw->pipeline.stipple );
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if (draw->pipeline.unfilled)
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draw->pipeline.unfilled->destroy( draw->pipeline.unfilled );
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if (draw->pipeline.twoside)
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draw->pipeline.twoside->destroy( draw->pipeline.twoside );
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if (draw->pipeline.offset)
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draw->pipeline.offset->destroy( draw->pipeline.offset );
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if (draw->pipeline.clip)
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draw->pipeline.clip->destroy( draw->pipeline.clip );
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if (draw->pipeline.flatshade)
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draw->pipeline.flatshade->destroy( draw->pipeline.flatshade );
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if (draw->pipeline.cull)
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draw->pipeline.cull->destroy( draw->pipeline.cull );
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if (draw->pipeline.validate)
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draw->pipeline.validate->destroy( draw->pipeline.validate );
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if (draw->pipeline.aaline)
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draw->pipeline.aaline->destroy( draw->pipeline.aaline );
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if (draw->pipeline.aapoint)
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draw->pipeline.aapoint->destroy( draw->pipeline.aapoint );
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if (draw->pipeline.pstipple)
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draw->pipeline.pstipple->destroy( draw->pipeline.pstipple );
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if (draw->pipeline.rasterize)
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draw->pipeline.rasterize->destroy( draw->pipeline.rasterize );
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}
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/**
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* Build primitive to render a point with vertex at v0.
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*/
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static void do_point( struct draw_context *draw,
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const char *v0 )
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{
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struct prim_header prim;
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prim.flags = 0;
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prim.pad = 0;
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prim.v[0] = (struct vertex_header *)v0;
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draw->pipeline.first->point( draw->pipeline.first, &prim );
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}
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/**
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* Build primitive to render a line with vertices at v0, v1.
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* \param flags bitmask of DRAW_PIPE_EDGE_x, DRAW_PIPE_RESET_STIPPLE
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*/
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static void do_line( struct draw_context *draw,
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ushort flags,
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const char *v0,
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const char *v1 )
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{
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struct prim_header prim;
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prim.flags = flags;
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prim.pad = 0;
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prim.v[0] = (struct vertex_header *)v0;
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prim.v[1] = (struct vertex_header *)v1;
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draw->pipeline.first->line( draw->pipeline.first, &prim );
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}
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/**
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* Build primitive to render a triangle with vertices at v0, v1, v2.
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* \param flags bitmask of DRAW_PIPE_EDGE_x, DRAW_PIPE_RESET_STIPPLE
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*/
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static void do_triangle( struct draw_context *draw,
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ushort flags,
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char *v0,
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char *v1,
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char *v2 )
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{
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struct prim_header prim;
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prim.v[0] = (struct vertex_header *)v0;
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prim.v[1] = (struct vertex_header *)v1;
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prim.v[2] = (struct vertex_header *)v2;
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prim.flags = flags;
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prim.pad = 0;
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draw->pipeline.first->tri( draw->pipeline.first, &prim );
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}
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/*
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* Set up macros for draw_pt_decompose.h template code.
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* This code uses vertex indexes / elements.
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*/
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#define TRIANGLE(flags,i0,i1,i2) \
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do { \
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do_triangle( draw, \
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flags, \
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verts + stride * (i0), \
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verts + stride * (i1), \
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verts + stride * (i2) ); \
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} while (0)
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#define LINE(flags,i0,i1) \
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do { \
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do_line( draw, \
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flags, \
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verts + stride * (i0), \
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verts + stride * (i1) ); \
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} while (0)
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#define POINT(i0) \
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do { \
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do_point( draw, verts + stride * (i0) ); \
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} while (0)
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#define GET_ELT(idx) (MIN2(elts[idx], max_index))
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#define FUNC pipe_run_elts
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#define FUNC_VARS \
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struct draw_context *draw, \
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unsigned prim, \
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unsigned prim_flags, \
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struct vertex_header *vertices, \
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unsigned stride, \
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const ushort *elts, \
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unsigned count, \
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unsigned max_index
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#include "draw_pt_decompose.h"
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/**
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* Code to run the pipeline on a fairly arbitrary collection of vertices.
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* For drawing indexed primitives.
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*
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* Vertex headers must be pre-initialized with the
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* UNDEFINED_VERTEX_ID, this code will cause that id to become
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* overwritten, so it may have to be reset if there is the intention
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* to reuse the vertices.
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*
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* This code provides a callback to reset the vertex id's which the
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* draw_vbuf.c code uses when it has to perform a flush.
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*/
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void draw_pipeline_run( struct draw_context *draw,
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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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{
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unsigned i, start;
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draw->pipeline.verts = (char *)vert_info->verts;
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draw->pipeline.vertex_stride = vert_info->stride;
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draw->pipeline.vertex_count = vert_info->count;
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for (start = i = 0;
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i < prim_info->primitive_count;
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start += prim_info->primitive_lengths[i], i++)
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{
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const unsigned count = prim_info->primitive_lengths[i];
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#if DEBUG
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/* Warn if one of the element indexes go outside the vertex buffer */
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{
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unsigned max_index = 0x0, i;
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/* find the largest element index */
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for (i = 0; i < count; i++) {
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unsigned int index = prim_info->elts[start + i];
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if (index > max_index)
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max_index = index;
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}
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if (max_index >= vert_info->count) {
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debug_printf("%s: max_index (%u) outside vertex buffer (%u)\n",
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__FUNCTION__,
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max_index,
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vert_info->count);
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}
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}
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#endif
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pipe_run_elts(draw,
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prim_info->prim,
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prim_info->flags,
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vert_info->verts,
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vert_info->stride,
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prim_info->elts + start,
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count,
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vert_info->count - 1);
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}
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draw->pipeline.verts = NULL;
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draw->pipeline.vertex_count = 0;
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}
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/*
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* Set up macros for draw_pt_decompose.h template code.
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* This code is for non-indexed (aka linear) rendering (no elts).
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*/
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#define TRIANGLE(flags,i0,i1,i2) \
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do_triangle( draw, flags, \
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verts + stride * (i0), \
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verts + stride * (i1), \
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verts + stride * (i2) )
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#define LINE(flags,i0,i1) \
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do_line( draw, flags, \
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verts + stride * (i0), \
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verts + stride * (i1) )
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#define POINT(i0) \
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do_point( draw, verts + stride * (i0) )
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#define GET_ELT(idx) (idx)
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#define FUNC pipe_run_linear
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#define FUNC_VARS \
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struct draw_context *draw, \
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unsigned prim, \
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unsigned prim_flags, \
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struct vertex_header *vertices, \
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unsigned stride, \
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unsigned count
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#include "draw_pt_decompose.h"
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/*
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* For drawing non-indexed primitives.
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*/
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void draw_pipeline_run_linear( struct draw_context *draw,
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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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{
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unsigned i, start;
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for (start = i = 0;
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i < prim_info->primitive_count;
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start += prim_info->primitive_lengths[i], i++)
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{
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unsigned count = prim_info->primitive_lengths[i];
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char *verts = ((char*)vert_info->verts) +
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(start * vert_info->stride);
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draw->pipeline.verts = verts;
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draw->pipeline.vertex_stride = vert_info->stride;
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draw->pipeline.vertex_count = count;
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assert(count <= vert_info->count);
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pipe_run_linear(draw,
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prim_info->prim,
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prim_info->flags,
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(struct vertex_header*)verts,
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vert_info->stride,
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count);
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}
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draw->pipeline.verts = NULL;
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draw->pipeline.vertex_count = 0;
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}
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void draw_pipeline_flush( struct draw_context *draw,
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unsigned flags )
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{
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draw->pipeline.first->flush( draw->pipeline.first, flags );
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if (flags & DRAW_FLUSH_STATE_CHANGE)
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draw->pipeline.first = draw->pipeline.validate;
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}
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