diff options
Diffstat (limited to 'src/mesa/pipe/draw/draw_cull.c')
| -rw-r--r-- | src/mesa/pipe/draw/draw_cull.c | 150 |
1 files changed, 0 insertions, 150 deletions
diff --git a/src/mesa/pipe/draw/draw_cull.c b/src/mesa/pipe/draw/draw_cull.c deleted file mode 100644 index 8177b0ac86e..00000000000 --- a/src/mesa/pipe/draw/draw_cull.c +++ /dev/null @@ -1,150 +0,0 @@ -/************************************************************************** - * - * Copyright 2007 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. - * - **************************************************************************/ - -/** - * \brief Drawing stage for polygon culling - */ - -/* Authors: Keith Whitwell <[email protected]> - */ - - -#include "pipe/p_util.h" -#include "pipe/p_defines.h" -#include "draw_private.h" - - -struct cull_stage { - struct draw_stage stage; - unsigned winding; /**< which winding(s) to cull (one of PIPE_WINDING_x) */ -}; - - -static INLINE struct cull_stage *cull_stage( struct draw_stage *stage ) -{ - return (struct cull_stage *)stage; -} - - - - -static void cull_tri( struct draw_stage *stage, - struct prim_header *header ) -{ - /* Window coords: */ - const float *v0 = header->v[0]->data[0]; - const float *v1 = header->v[1]->data[0]; - const float *v2 = header->v[2]->data[0]; - - /* edge vectors e = v0 - v2, f = v1 - v2 */ - const float ex = v0[0] - v2[0]; - const float ey = v0[1] - v2[1]; - const float fx = v1[0] - v2[0]; - const float fy = v1[1] - v2[1]; - - /* det = cross(e,f).z */ - header->det = ex * fy - ey * fx; - - if (header->det != 0) { - /* if (det < 0 then Z points toward camera and triangle is - * counter-clockwise winding. - */ - unsigned winding = (header->det < 0) ? PIPE_WINDING_CCW : PIPE_WINDING_CW; - - if ((winding & cull_stage(stage)->winding) == 0) { - /* triangle is not culled, pass to next stage */ - stage->next->tri( stage->next, header ); - } - } -} - -static void cull_first_tri( struct draw_stage *stage, - struct prim_header *header ) -{ - struct cull_stage *cull = cull_stage(stage); - - cull->winding = stage->draw->rasterizer->cull_mode; - - stage->tri = cull_tri; - stage->tri( stage, header ); -} - - - -static void cull_line( struct draw_stage *stage, - struct prim_header *header ) -{ - stage->next->line( stage->next, header ); -} - - -static void cull_point( struct draw_stage *stage, - struct prim_header *header ) -{ - stage->next->point( stage->next, header ); -} - - -static void cull_flush( struct draw_stage *stage, unsigned flags ) -{ - stage->tri = cull_first_tri; - stage->next->flush( stage->next, flags ); -} - -static void cull_reset_stipple_counter( struct draw_stage *stage ) -{ - stage->next->reset_stipple_counter( stage->next ); -} - - -static void cull_destroy( struct draw_stage *stage ) -{ - draw_free_temp_verts( stage ); - FREE( stage ); -} - - -/** - * Create a new polygon culling stage. - */ -struct draw_stage *draw_cull_stage( struct draw_context *draw ) -{ - struct cull_stage *cull = CALLOC_STRUCT(cull_stage); - - draw_alloc_temp_verts( &cull->stage, 0 ); - - cull->stage.draw = draw; - cull->stage.next = NULL; - cull->stage.point = cull_point; - cull->stage.line = cull_line; - cull->stage.tri = cull_first_tri; - cull->stage.flush = cull_flush; - cull->stage.reset_stipple_counter = cull_reset_stipple_counter; - cull->stage.destroy = cull_destroy; - - return &cull->stage; -} |