diff options
Diffstat (limited to 'src/mesa/pipe/draw/draw_offset.c')
| -rw-r--r-- | src/mesa/pipe/draw/draw_offset.c | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/src/mesa/pipe/draw/draw_offset.c b/src/mesa/pipe/draw/draw_offset.c deleted file mode 100644 index a2990ee8a8..0000000000 --- a/src/mesa/pipe/draw/draw_offset.c +++ /dev/null @@ -1,186 +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 polygon offset state - * - * \author Keith Whitwell <keith@tungstengraphics.com> - * \author Brian Paul - */ - -#include "pipe/p_util.h" -#include "draw_private.h" - - - -struct offset_stage { - struct draw_stage stage; - - float scale; - float units; -}; - - - -static INLINE struct offset_stage *offset_stage( struct draw_stage *stage ) -{ - return (struct offset_stage *) stage; -} - - - - - -/** - * Offset tri Z. Some hardware can handle this, but not usually when - * doing unfilled rendering. - */ -static void do_offset_tri( struct draw_stage *stage, - struct prim_header *header ) -{ - struct offset_stage *offset = offset_stage(stage); - float inv_det = 1.0f / header->det; - - /* Window coords: - */ - float *v0 = header->v[0]->data[0]; - float *v1 = header->v[1]->data[0]; - float *v2 = header->v[2]->data[0]; - - /* edge vectors e = v0 - v2, f = v1 - v2 */ - float ex = v0[0] - v2[0]; - float ey = v0[1] - v2[1]; - float ez = v0[2] - v2[2]; - float fx = v1[0] - v2[0]; - float fy = v1[1] - v2[1]; - float fz = v1[2] - v2[2]; - - /* (a,b) = cross(e,f).xy */ - float a = ey*fz - ez*fy; - float b = ez*fx - ex*fz; - - float dzdx = FABSF(a * inv_det); - float dzdy = FABSF(b * inv_det); - - float zoffset = offset->units + MAX2(dzdx, dzdy) * offset->scale; - - /* - * Note: we're applying the offset and clamping per-vertex. - * Ideally, the offset is applied per-fragment prior to fragment shading. - */ - v0[2] = CLAMP(v0[2] + zoffset, 0.0f, 1.0f); - v1[2] = CLAMP(v1[2] + zoffset, 0.0f, 1.0f); - v2[2] = CLAMP(v2[2] + zoffset, 0.0f, 1.0f); - - stage->next->tri( stage->next, header ); -} - - -static void offset_tri( struct draw_stage *stage, - struct prim_header *header ) -{ - struct prim_header tmp; - - tmp.det = header->det; - tmp.edgeflags = header->edgeflags; - tmp.v[0] = dup_vert(stage, header->v[0], 0); - tmp.v[1] = dup_vert(stage, header->v[1], 1); - tmp.v[2] = dup_vert(stage, header->v[2], 2); - - do_offset_tri( stage, &tmp ); -} - - -static void offset_first_tri( struct draw_stage *stage, - struct prim_header *header ) -{ - struct offset_stage *offset = offset_stage(stage); - float mrd = 1.0f / 65535.0f; /* XXX this depends on depthbuffer bits! */ - - offset->units = stage->draw->rasterizer->offset_units * mrd; - offset->scale = stage->draw->rasterizer->offset_scale; - - stage->tri = offset_tri; - stage->tri( stage, header ); -} - - -static void offset_line( struct draw_stage *stage, - struct prim_header *header ) -{ - stage->next->line( stage->next, header ); -} - - -static void offset_point( struct draw_stage *stage, - struct prim_header *header ) -{ - stage->next->point( stage->next, header ); -} - - -static void offset_flush( struct draw_stage *stage, - unsigned flags ) -{ - stage->tri = offset_first_tri; - stage->next->flush( stage->next, flags ); -} - - -static void offset_reset_stipple_counter( struct draw_stage *stage ) -{ - stage->next->reset_stipple_counter( stage->next ); -} - - -static void offset_destroy( struct draw_stage *stage ) -{ - draw_free_tmps( stage ); - FREE( stage ); -} - - -/** - * Create polygon offset drawing stage. - */ -struct draw_stage *draw_offset_stage( struct draw_context *draw ) -{ - struct offset_stage *offset = CALLOC_STRUCT(offset_stage); - - draw_alloc_tmps( &offset->stage, 3 ); - - offset->stage.draw = draw; - offset->stage.next = NULL; - offset->stage.point = offset_point; - offset->stage.line = offset_line; - offset->stage.tri = offset_first_tri; - offset->stage.flush = offset_flush; - offset->stage.reset_stipple_counter = offset_reset_stipple_counter; - offset->stage.destroy = offset_destroy; - - return &offset->stage; -} |