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