235 lines
6.6 KiB
C
235 lines
6.6 KiB
C
/**************************************************************************
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*
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* Copyright 2008 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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#include "util/u_memory.h"
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#include "util/u_math.h"
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#include "util/u_prim.h"
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#include "pipe/p_context.h"
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#include "draw/draw_context.h"
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#include "draw/draw_private.h"
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#include "draw/draw_pt.h"
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#include "draw/draw_vs.h"
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#define DO_CLIP_XY 0x1
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#define DO_CLIP_FULL_Z 0x2
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#define DO_CLIP_HALF_Z 0x4
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#define DO_CLIP_USER 0x8
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#define DO_VIEWPORT 0x10
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#define DO_EDGEFLAG 0x20
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#define DO_CLIP_XY_GUARD_BAND 0x40
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struct pt_post_vs {
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struct draw_context *draw;
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unsigned flags;
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boolean (*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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};
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static INLINE void
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initialize_vertex_header(struct vertex_header *header)
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{
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header->clipmask = 0;
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header->edgeflag = 1;
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header->have_clipdist = 0;
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header->vertex_id = UNDEFINED_VERTEX_ID;
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}
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static INLINE float
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dot4(const float *a, const float *b)
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{
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return (a[0]*b[0] +
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a[1]*b[1] +
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a[2]*b[2] +
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a[3]*b[3]);
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}
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#define FLAGS (0)
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#define TAG(x) x##_none
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#include "draw_cliptest_tmp.h"
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#define FLAGS (DO_CLIP_XY | DO_CLIP_FULL_Z | DO_VIEWPORT)
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#define TAG(x) x##_xy_fullz_viewport
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#include "draw_cliptest_tmp.h"
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#define FLAGS (DO_CLIP_XY | DO_CLIP_HALF_Z | DO_VIEWPORT)
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#define TAG(x) x##_xy_halfz_viewport
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#include "draw_cliptest_tmp.h"
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#define FLAGS (DO_CLIP_XY_GUARD_BAND | DO_CLIP_HALF_Z | DO_VIEWPORT)
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#define TAG(x) x##_xy_gb_halfz_viewport
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#include "draw_cliptest_tmp.h"
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#define FLAGS (DO_CLIP_FULL_Z | DO_VIEWPORT)
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#define TAG(x) x##_fullz_viewport
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#include "draw_cliptest_tmp.h"
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#define FLAGS (DO_CLIP_HALF_Z | DO_VIEWPORT)
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#define TAG(x) x##_halfz_viewport
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#include "draw_cliptest_tmp.h"
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#define FLAGS (DO_CLIP_XY | DO_CLIP_FULL_Z | DO_CLIP_USER | DO_VIEWPORT)
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#define TAG(x) x##_xy_fullz_user_viewport
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#include "draw_cliptest_tmp.h"
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#define FLAGS (DO_CLIP_XY | DO_CLIP_FULL_Z | DO_CLIP_USER | DO_VIEWPORT | DO_EDGEFLAG)
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#define TAG(x) x##_xy_fullz_user_viewport_edgeflag
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#include "draw_cliptest_tmp.h"
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/* Don't want to create 64 versions of this function, so catch the
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* less common ones here. This is looking like something which should
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* be code-generated, perhaps appended to the end of the vertex
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* shader.
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*/
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#define FLAGS (pvs->flags)
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#define TAG(x) x##_generic
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#include "draw_cliptest_tmp.h"
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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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{
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return pvs->run( pvs, info, prim_info );
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}
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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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{
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pvs->flags = 0;
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/* This combination not currently tested/in use:
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*/
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if (!clip_halfz)
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guard_band = FALSE;
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if (clip_xy && !guard_band) {
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pvs->flags |= DO_CLIP_XY;
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ASSIGN_4V( pvs->draw->plane[0], -1, 0, 0, 1 );
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ASSIGN_4V( pvs->draw->plane[1], 1, 0, 0, 1 );
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ASSIGN_4V( pvs->draw->plane[2], 0, -1, 0, 1 );
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ASSIGN_4V( pvs->draw->plane[3], 0, 1, 0, 1 );
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}
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else if (clip_xy && guard_band) {
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pvs->flags |= DO_CLIP_XY_GUARD_BAND;
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ASSIGN_4V( pvs->draw->plane[0], -0.5, 0, 0, 1 );
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ASSIGN_4V( pvs->draw->plane[1], 0.5, 0, 0, 1 );
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ASSIGN_4V( pvs->draw->plane[2], 0, -0.5, 0, 1 );
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ASSIGN_4V( pvs->draw->plane[3], 0, 0.5, 0, 1 );
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}
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if (clip_z) {
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if (clip_halfz) {
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pvs->flags |= DO_CLIP_HALF_Z;
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ASSIGN_4V( pvs->draw->plane[4], 0, 0, 1, 0 );
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} else {
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pvs->flags |= DO_CLIP_FULL_Z;
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ASSIGN_4V( pvs->draw->plane[4], 0, 0, 1, 1 );
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}
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}
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if (clip_user)
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pvs->flags |= DO_CLIP_USER;
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if (!bypass_viewport)
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pvs->flags |= DO_VIEWPORT;
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if (need_edgeflags)
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pvs->flags |= DO_EDGEFLAG;
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/* Now select the relevant function:
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*/
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switch (pvs->flags) {
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case 0:
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pvs->run = do_cliptest_none;
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break;
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case DO_CLIP_XY | DO_CLIP_FULL_Z | DO_VIEWPORT:
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pvs->run = do_cliptest_xy_fullz_viewport;
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break;
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case DO_CLIP_XY | DO_CLIP_HALF_Z | DO_VIEWPORT:
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pvs->run = do_cliptest_xy_halfz_viewport;
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break;
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case DO_CLIP_XY_GUARD_BAND | DO_CLIP_HALF_Z | DO_VIEWPORT:
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pvs->run = do_cliptest_xy_gb_halfz_viewport;
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break;
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case DO_CLIP_FULL_Z | DO_VIEWPORT:
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pvs->run = do_cliptest_fullz_viewport;
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break;
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case DO_CLIP_HALF_Z | DO_VIEWPORT:
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pvs->run = do_cliptest_halfz_viewport;
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break;
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case DO_CLIP_XY | DO_CLIP_FULL_Z | DO_CLIP_USER | DO_VIEWPORT:
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pvs->run = do_cliptest_xy_fullz_user_viewport;
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break;
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case (DO_CLIP_XY | DO_CLIP_FULL_Z | DO_CLIP_USER |
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DO_VIEWPORT | DO_EDGEFLAG):
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pvs->run = do_cliptest_xy_fullz_user_viewport_edgeflag;
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break;
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default:
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pvs->run = do_cliptest_generic;
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break;
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}
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}
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struct pt_post_vs *draw_pt_post_vs_create( struct draw_context *draw )
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{
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struct pt_post_vs *pvs = CALLOC_STRUCT( pt_post_vs );
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if (!pvs)
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return NULL;
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pvs->draw = draw;
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return pvs;
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}
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void draw_pt_post_vs_destroy( struct pt_post_vs *pvs )
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{
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FREE(pvs);
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}
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