/**************************************************************************
*
- * 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
* 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.
* Convert triangles to points or lines as needed.
*/
-/* Authors: Keith Whitwell <keith@tungstengraphics.com>
+/* Authors: Keith Whitwell <keithw@vmware.com>
*/
-#include "pipe/p_util.h"
+#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 {
* 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);
+ boolean is_front_face = (
+ (stage->draw->rasterizer->front_ccw && header->det < 0.0f) ||
+ (!stage->draw->rasterizer->front_ccw && header->det > 0.0f));
+ 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->edgeflags & 0x1) point( stage, v0 );
- if (header->edgeflags & 0x2) point( stage, v1 );
- if (header->edgeflags & 0x4) 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 0
- assert(((header->edgeflags & 0x1) >> 0) == header->v[0]->edgeflag);
- assert(((header->edgeflags & 0x2) >> 1) == header->v[1]->edgeflag);
- assert(((header->edgeflags & 0x4) >> 2) == header->v[2]->edgeflag);
-#endif
+ if (header->flags & DRAW_PIPE_RESET_STIPPLE)
+ /*
+ * 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->edgeflags & 0x4) line( stage, v2, v0 );
- if (header->edgeflags & 0x1) line( stage, v0, v1 );
- if (header->edgeflags & 0x2) 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");
}
/* Unfilled tri:
*
* Note edgeflags in the vertex struct is not sufficient as we will
- * need to manipulate them when decomposing primitives???
+ * need to manipulate them when decomposing primitives.
+ *
+ * We currently keep the vertex edgeflag and primitive edgeflag mask
+ * separate until the last possible moment.
*/
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 );
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 );
}
-static void unfilled_line( struct draw_stage *stage,
- struct prim_header *header )
-{
- stage->next->line( stage->next, header );
-}
-
-
-static void unfilled_point( struct draw_stage *stage,
- struct prim_header *header )
-{
- stage->next->point( stage->next, header );
-}
-
static void unfilled_flush( struct draw_stage *stage,
unsigned flags )
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.
struct draw_stage *draw_unfilled_stage( struct draw_context *draw )
{
struct unfilled_stage *unfilled = CALLOC_STRUCT(unfilled_stage);
-
- 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 = unfilled_point;
- unfilled->stage.line = unfilled_line;
+ unfilled->stage.point = draw_pipe_passthrough_point;
+ unfilled->stage.line = draw_pipe_passthrough_line;
unfilled->stage.tri = unfilled_first_tri;
unfilled->stage.flush = unfilled_flush;
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:
+ if (unfilled)
+ unfilled->stage.destroy( &unfilled->stage );
+
+ return NULL;
}
projects / mesa.git / blobdiff