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/************************************************************************** |
* |
* Copyright 2008 VMware, Inc. |
* 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 VMWARE 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. |
* |
**************************************************************************/ |
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#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" |
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#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 |
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struct pt_post_vs { |
struct draw_context *draw; |
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unsigned flags; |
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boolean (*run)( struct pt_post_vs *pvs, |
struct draw_vertex_info *info, |
const struct draw_prim_info *prim_info ); |
}; |
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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; |
} |
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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]); |
} |
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#define FLAGS (0) |
#define TAG(x) x##_none |
#include "draw_cliptest_tmp.h" |
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#define FLAGS (DO_CLIP_XY | DO_CLIP_FULL_Z | DO_VIEWPORT) |
#define TAG(x) x##_xy_fullz_viewport |
#include "draw_cliptest_tmp.h" |
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#define FLAGS (DO_CLIP_XY | DO_CLIP_HALF_Z | DO_VIEWPORT) |
#define TAG(x) x##_xy_halfz_viewport |
#include "draw_cliptest_tmp.h" |
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#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" |
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#define FLAGS (DO_CLIP_FULL_Z | DO_VIEWPORT) |
#define TAG(x) x##_fullz_viewport |
#include "draw_cliptest_tmp.h" |
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#define FLAGS (DO_CLIP_HALF_Z | DO_VIEWPORT) |
#define TAG(x) x##_halfz_viewport |
#include "draw_cliptest_tmp.h" |
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#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" |
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#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" |
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|
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/* 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" |
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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 ); |
} |
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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 ); |
} |
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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 ); |
} |
} |
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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; |
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case DO_CLIP_XY | DO_CLIP_HALF_Z | DO_VIEWPORT: |
pvs->run = do_cliptest_xy_halfz_viewport; |
break; |
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case DO_CLIP_XY_GUARD_BAND | DO_CLIP_HALF_Z | DO_VIEWPORT: |
pvs->run = do_cliptest_xy_gb_halfz_viewport; |
break; |
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case DO_CLIP_FULL_Z | DO_VIEWPORT: |
pvs->run = do_cliptest_fullz_viewport; |
break; |
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case DO_CLIP_HALF_Z | DO_VIEWPORT: |
pvs->run = do_cliptest_halfz_viewport; |
break; |
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case DO_CLIP_XY | DO_CLIP_FULL_Z | DO_CLIP_USER | DO_VIEWPORT: |
pvs->run = do_cliptest_xy_fullz_user_viewport; |
break; |
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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; |
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default: |
pvs->run = do_cliptest_generic; |
break; |
} |
} |
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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; |
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pvs->draw = draw; |
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return pvs; |
} |
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void draw_pt_post_vs_destroy( struct pt_post_vs *pvs ) |
{ |
FREE(pvs); |
} |