X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fgallium%2Fauxiliary%2Fdraw%2Fdraw_pipe_unfilled.c;h=c465c7526f5c03b2b4cc6ee676bcc7c72f36f44f;hb=64da11f05294551a248f395db168f4941f969b45;hp=68835fd1a592ac6eb2eb25e208b588467b36d2fd;hpb=e97681c7f551a2a2a6bd5eff0f4192a870c816c0;p=mesa.git diff --git a/src/gallium/auxiliary/draw/draw_pipe_unfilled.c b/src/gallium/auxiliary/draw/draw_pipe_unfilled.c index 68835fd1a59..c465c7526f5 100644 --- a/src/gallium/auxiliary/draw/draw_pipe_unfilled.c +++ b/src/gallium/auxiliary/draw/draw_pipe_unfilled.c @@ -1,6 +1,6 @@ /************************************************************************** * - * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. + * Copyright 2007 VMware, Inc. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a @@ -18,7 +18,7 @@ * 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 + * 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. @@ -30,13 +30,14 @@ * Convert triangles to points or lines as needed. */ -/* Authors: Keith Whitwell +/* Authors: Keith Whitwell */ #include "util/u_memory.h" #include "pipe/p_defines.h" #include "draw_private.h" #include "draw_pipe.h" +#include "draw_fs.h" struct unfilled_stage { @@ -47,61 +48,130 @@ struct unfilled_stage { * and PIPE_POLYGON_MODE_POINT, */ unsigned mode[2]; + + int face_slot; }; -static INLINE struct unfilled_stage *unfilled_stage( struct draw_stage *stage ) +static inline struct unfilled_stage *unfilled_stage( struct draw_stage *stage ) { return (struct unfilled_stage *)stage; } +static void +inject_front_face_info(struct draw_stage *stage, + struct prim_header *header) +{ + struct unfilled_stage *unfilled = unfilled_stage(stage); + unsigned ccw = header->det < 0.0; + boolean is_front_face = ( + (stage->draw->rasterizer->front_ccw && ccw) || + (!stage->draw->rasterizer->front_ccw && !ccw)); + int slot = unfilled->face_slot; + unsigned i; + + /* In case the backend doesn't care about it */ + if (slot < 0) { + return; + } + + for (i = 0; i < 3; ++i) { + struct vertex_header *v = header->v[i]; + v->data[slot][0] = is_front_face; + v->data[slot][1] = is_front_face; + v->data[slot][2] = is_front_face; + v->data[slot][3] = is_front_face; + v->vertex_id = UNDEFINED_VERTEX_ID; + } +} - -static void point( struct draw_stage *stage, - struct vertex_header *v0 ) + +static void point(struct draw_stage *stage, + struct prim_header *header, + struct vertex_header *v0) { struct prim_header tmp; + tmp.det = header->det; + tmp.flags = 0; tmp.v[0] = v0; - stage->next->point( stage->next, &tmp ); + stage->next->point(stage->next, &tmp); } -static void line( struct draw_stage *stage, - struct vertex_header *v0, - struct vertex_header *v1 ) +static void line(struct draw_stage *stage, + struct prim_header *header, + struct vertex_header *v0, + struct vertex_header *v1) { struct prim_header tmp; + tmp.det = header->det; + tmp.flags = 0; tmp.v[0] = v0; tmp.v[1] = v1; - stage->next->line( stage->next, &tmp ); + stage->next->line(stage->next, &tmp); } -static void points( struct draw_stage *stage, - struct prim_header *header ) +static void points(struct draw_stage *stage, + struct prim_header *header) { struct vertex_header *v0 = header->v[0]; struct vertex_header *v1 = header->v[1]; struct vertex_header *v2 = header->v[2]; - if ((header->flags & DRAW_PIPE_EDGE_FLAG_0) && v0->edgeflag) point( stage, v0 ); - if ((header->flags & DRAW_PIPE_EDGE_FLAG_1) && v1->edgeflag) point( stage, v1 ); - if ((header->flags & DRAW_PIPE_EDGE_FLAG_2) && v2->edgeflag) point( stage, v2 ); + inject_front_face_info(stage, header); + + if ((header->flags & DRAW_PIPE_EDGE_FLAG_0) && v0->edgeflag) + point(stage, header, v0); + if ((header->flags & DRAW_PIPE_EDGE_FLAG_1) && v1->edgeflag) + point(stage, header, v1); + if ((header->flags & DRAW_PIPE_EDGE_FLAG_2) && v2->edgeflag) + point(stage, header, v2); } -static void lines( struct draw_stage *stage, - struct prim_header *header ) +static void lines(struct draw_stage *stage, + struct prim_header *header) { struct vertex_header *v0 = header->v[0]; struct vertex_header *v1 = header->v[1]; struct vertex_header *v2 = header->v[2]; if (header->flags & DRAW_PIPE_RESET_STIPPLE) - stage->next->reset_stipple_counter( stage->next ); + /* + * XXX could revisit this. The only stage which cares is the line + * stipple stage. Could just emit correct reset flags here and not + * bother about all the calling through reset_stipple_counter + * stages. Though technically it is necessary if line stipple is + * handled by the driver, but this is not actually hooked up when + * using vbuf (vbuf stage reset_stipple_counter does nothing). + */ + stage->next->reset_stipple_counter(stage->next); + + inject_front_face_info(stage, header); + + if ((header->flags & DRAW_PIPE_EDGE_FLAG_2) && v2->edgeflag) + line(stage, header, v2, v0); + if ((header->flags & DRAW_PIPE_EDGE_FLAG_0) && v0->edgeflag) + line(stage, header, v0, v1); + if ((header->flags & DRAW_PIPE_EDGE_FLAG_1) && v1->edgeflag) + line(stage, header, v1, v2); +} + - if ((header->flags & DRAW_PIPE_EDGE_FLAG_2) && v2->edgeflag) line( stage, v2, v0 ); - if ((header->flags & DRAW_PIPE_EDGE_FLAG_0) && v0->edgeflag) line( stage, v0, v1 ); - if ((header->flags & DRAW_PIPE_EDGE_FLAG_1) && v1->edgeflag) line( stage, v1, v2 ); +/** For debugging */ +static void +print_header_flags(unsigned flags) +{ + debug_printf("header->flags = "); + if (flags & DRAW_PIPE_RESET_STIPPLE) + debug_printf("RESET_STIPPLE "); + if (flags & DRAW_PIPE_EDGE_FLAG_0) + debug_printf("EDGE_FLAG_0 "); + if (flags & DRAW_PIPE_EDGE_FLAG_1) + debug_printf("EDGE_FLAG_1 "); + if (flags & DRAW_PIPE_EDGE_FLAG_2) + debug_printf("EDGE_FLAG_2 "); + debug_printf("\n"); } @@ -117,8 +187,12 @@ static void unfilled_tri( struct draw_stage *stage, struct prim_header *header ) { struct unfilled_stage *unfilled = unfilled_stage(stage); - unsigned mode = unfilled->mode[header->det >= 0.0]; + unsigned cw = header->det >= 0.0; + unsigned mode = unfilled->mode[cw]; + if (0) + print_header_flags(header->flags); + switch (mode) { case PIPE_POLYGON_MODE_FILL: stage->next->tri( stage->next, header ); @@ -139,9 +213,10 @@ static void unfilled_first_tri( struct draw_stage *stage, struct prim_header *header ) { struct unfilled_stage *unfilled = unfilled_stage(stage); + const struct pipe_rasterizer_state *rast = stage->draw->rasterizer; - unfilled->mode[0] = stage->draw->rasterizer->fill_ccw; /* front */ - unfilled->mode[1] = stage->draw->rasterizer->fill_cw; /* back */ + unfilled->mode[0] = rast->front_ccw ? rast->fill_front : rast->fill_back; + unfilled->mode[1] = rast->front_ccw ? rast->fill_back : rast->fill_front; stage->tri = unfilled_tri; stage->tri( stage, header ); @@ -170,6 +245,29 @@ static void unfilled_destroy( struct draw_stage *stage ) FREE( stage ); } +/* + * Try to allocate an output slot which we can use + * to preserve the front face information. + */ +void +draw_unfilled_prepare_outputs( struct draw_context *draw, + struct draw_stage *stage ) +{ + struct unfilled_stage *unfilled = unfilled_stage(stage); + const struct pipe_rasterizer_state *rast = draw ? draw->rasterizer : 0; + boolean is_unfilled = (rast && + (rast->fill_front != PIPE_POLYGON_MODE_FILL || + rast->fill_back != PIPE_POLYGON_MODE_FILL)); + const struct draw_fragment_shader *fs = draw ? draw->fs.fragment_shader : 0; + + if (is_unfilled && fs && fs->info.uses_frontface) { + unfilled->face_slot = draw_alloc_extra_vertex_attrib( + stage->draw, TGSI_SEMANTIC_FACE, 0); + } else { + unfilled->face_slot = -1; + } +} + /** * Create unfilled triangle stage. @@ -177,13 +275,11 @@ static void unfilled_destroy( struct draw_stage *stage ) struct draw_stage *draw_unfilled_stage( struct draw_context *draw ) { struct unfilled_stage *unfilled = CALLOC_STRUCT(unfilled_stage); - if (unfilled == NULL) - goto fail; - - if (!draw_alloc_temp_verts( &unfilled->stage, 0 )) + if (!unfilled) goto fail; unfilled->stage.draw = draw; + unfilled->stage.name = "unfilled"; unfilled->stage.next = NULL; unfilled->stage.tmp = NULL; unfilled->stage.point = draw_pipe_passthrough_point; @@ -193,6 +289,11 @@ struct draw_stage *draw_unfilled_stage( struct draw_context *draw ) unfilled->stage.reset_stipple_counter = unfilled_reset_stipple_counter; unfilled->stage.destroy = unfilled_destroy; + unfilled->face_slot = -1; + + if (!draw_alloc_temp_verts( &unfilled->stage, 0 )) + goto fail; + return &unfilled->stage; fail: