diff options
Diffstat (limited to 'src/mesa/pipe/draw/draw_twoside.c')
| -rw-r--r-- | src/mesa/pipe/draw/draw_twoside.c | 203 |
1 files changed, 0 insertions, 203 deletions
diff --git a/src/mesa/pipe/draw/draw_twoside.c b/src/mesa/pipe/draw/draw_twoside.c deleted file mode 100644 index 1c389579871..00000000000 --- a/src/mesa/pipe/draw/draw_twoside.c +++ /dev/null @@ -1,203 +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. - * - **************************************************************************/ - -/* Authors: Keith Whitwell <[email protected]> - */ - -#include "pipe/p_util.h" -#include "pipe/p_defines.h" -#include "pipe/p_shader_tokens.h" -#include "draw_private.h" - - -struct twoside_stage { - struct draw_stage stage; - float sign; /**< +1 or -1 */ - uint attrib_front0, attrib_back0; - uint attrib_front1, attrib_back1; -}; - - -static INLINE struct twoside_stage *twoside_stage( struct draw_stage *stage ) -{ - return (struct twoside_stage *)stage; -} - - - - -/** - * Copy back color(s) to front color(s). - */ -static INLINE struct vertex_header * -copy_bfc( struct twoside_stage *twoside, - const struct vertex_header *v, - unsigned idx ) -{ - struct vertex_header *tmp = dup_vert( &twoside->stage, v, idx ); - - if (twoside->attrib_back0) { - COPY_4FV(tmp->data[twoside->attrib_front0], - tmp->data[twoside->attrib_back0]); - } - if (twoside->attrib_back1) { - COPY_4FV(tmp->data[twoside->attrib_front1], - tmp->data[twoside->attrib_back1]); - } - - return tmp; -} - - -/* Twoside tri: - */ -static void twoside_tri( struct draw_stage *stage, - struct prim_header *header ) -{ - struct twoside_stage *twoside = twoside_stage(stage); - - if (header->det * twoside->sign < 0.0) { - /* this is a back-facing triangle */ - struct prim_header tmp; - - tmp.det = header->det; - tmp.edgeflags = header->edgeflags; - /* copy back attribs to front attribs */ - tmp.v[0] = copy_bfc(twoside, header->v[0], 0); - tmp.v[1] = copy_bfc(twoside, header->v[1], 1); - tmp.v[2] = copy_bfc(twoside, header->v[2], 2); - - stage->next->tri( stage->next, &tmp ); - } - else { - stage->next->tri( stage->next, header ); - } -} - - -static void twoside_line( struct draw_stage *stage, - struct prim_header *header ) -{ - /* pass-through */ - stage->next->line( stage->next, header ); -} - - -static void twoside_point( struct draw_stage *stage, - struct prim_header *header ) -{ - /* pass-through */ - stage->next->point( stage->next, header ); -} - - -static void twoside_first_tri( struct draw_stage *stage, - struct prim_header *header ) -{ - struct twoside_stage *twoside = twoside_stage(stage); - const struct pipe_shader_state *vs = stage->draw->vertex_shader->state; - uint i; - - twoside->attrib_front0 = 0; - twoside->attrib_front1 = 0; - twoside->attrib_back0 = 0; - twoside->attrib_back1 = 0; - - /* Find which vertex shader outputs are front/back colors */ - for (i = 0; i < vs->num_outputs; i++) { - if (vs->output_semantic_name[i] == TGSI_SEMANTIC_COLOR) { - if (vs->output_semantic_index[i] == 0) - twoside->attrib_front0 = i; - else - twoside->attrib_front1 = i; - } - if (vs->output_semantic_name[i] == TGSI_SEMANTIC_BCOLOR) { - if (vs->output_semantic_index[i] == 0) - twoside->attrib_back0 = i; - else - twoside->attrib_back1 = i; - } - } - - if (!twoside->attrib_back0) - twoside->attrib_front0 = 0; - - if (!twoside->attrib_back1) - twoside->attrib_front1 = 0; - - /* - * We'll multiply the primitive's determinant by this sign to determine - * if the triangle is back-facing (negative). - * sign = -1 for CCW, +1 for CW - */ - twoside->sign = (stage->draw->rasterizer->front_winding == PIPE_WINDING_CCW) ? -1.0f : 1.0f; - - stage->tri = twoside_tri; - stage->tri( stage, header ); -} - - -static void twoside_flush( struct draw_stage *stage, unsigned flags ) -{ - stage->tri = twoside_first_tri; - stage->next->flush( stage->next, flags ); -} - - -static void twoside_reset_stipple_counter( struct draw_stage *stage ) -{ - stage->next->reset_stipple_counter( stage->next ); -} - - -static void twoside_destroy( struct draw_stage *stage ) -{ - draw_free_temp_verts( stage ); - FREE( stage ); -} - - -/** - * Create twoside pipeline stage. - */ -struct draw_stage *draw_twoside_stage( struct draw_context *draw ) -{ - struct twoside_stage *twoside = CALLOC_STRUCT(twoside_stage); - - draw_alloc_temp_verts( &twoside->stage, 3 ); - - twoside->stage.draw = draw; - twoside->stage.next = NULL; - twoside->stage.point = twoside_point; - twoside->stage.line = twoside_line; - twoside->stage.tri = twoside_first_tri; - twoside->stage.flush = twoside_flush; - twoside->stage.reset_stipple_counter = twoside_reset_stipple_counter; - twoside->stage.destroy = twoside_destroy; - - return &twoside->stage; -} |