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-rw-r--r--src/gallium/auxiliary/draw/draw_pipe.c223
1 files changed, 223 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/draw/draw_pipe.c b/src/gallium/auxiliary/draw/draw_pipe.c
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+++ b/src/gallium/auxiliary/draw/draw_pipe.c
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+/**************************************************************************
+ *
+ * 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 "draw/draw_private.h"
+#include "draw/draw_pipe.h"
+
+
+
+boolean draw_pipeline_init( struct draw_context *draw )
+{
+ /* create pipeline stages */
+ draw->pipeline.wide_line = draw_wide_line_stage( draw );
+ draw->pipeline.wide_point = draw_wide_point_stage( draw );
+ draw->pipeline.stipple = draw_stipple_stage( draw );
+ draw->pipeline.unfilled = draw_unfilled_stage( draw );
+ draw->pipeline.twoside = draw_twoside_stage( draw );
+ draw->pipeline.offset = draw_offset_stage( draw );
+ draw->pipeline.clip = draw_clip_stage( draw );
+ draw->pipeline.flatshade = draw_flatshade_stage( draw );
+ draw->pipeline.cull = draw_cull_stage( draw );
+ draw->pipeline.validate = draw_validate_stage( draw );
+ draw->pipeline.first = draw->pipeline.validate;
+
+ if (!draw->pipeline.wide_line ||
+ !draw->pipeline.wide_point ||
+ !draw->pipeline.stipple ||
+ !draw->pipeline.unfilled ||
+ !draw->pipeline.twoside ||
+ !draw->pipeline.offset ||
+ !draw->pipeline.clip ||
+ !draw->pipeline.flatshade ||
+ !draw->pipeline.cull ||
+ !draw->pipeline.validate)
+ return FALSE;
+
+ /* these defaults are oriented toward the needs of softpipe */
+ draw->pipeline.wide_point_threshold = 1000000.0; /* infinity */
+ draw->pipeline.wide_line_threshold = 1.0;
+ draw->pipeline.line_stipple = TRUE;
+ draw->pipeline.point_sprite = TRUE;
+
+ return TRUE;
+}
+
+
+void draw_pipeline_destroy( struct draw_context *draw )
+{
+ if (draw->pipeline.wide_line)
+ draw->pipeline.wide_line->destroy( draw->pipeline.wide_line );
+ if (draw->pipeline.wide_point)
+ draw->pipeline.wide_point->destroy( draw->pipeline.wide_point );
+ if (draw->pipeline.stipple)
+ draw->pipeline.stipple->destroy( draw->pipeline.stipple );
+ if (draw->pipeline.unfilled)
+ draw->pipeline.unfilled->destroy( draw->pipeline.unfilled );
+ if (draw->pipeline.twoside)
+ draw->pipeline.twoside->destroy( draw->pipeline.twoside );
+ if (draw->pipeline.offset)
+ draw->pipeline.offset->destroy( draw->pipeline.offset );
+ if (draw->pipeline.clip)
+ draw->pipeline.clip->destroy( draw->pipeline.clip );
+ if (draw->pipeline.flatshade)
+ draw->pipeline.flatshade->destroy( draw->pipeline.flatshade );
+ if (draw->pipeline.cull)
+ draw->pipeline.cull->destroy( draw->pipeline.cull );
+ if (draw->pipeline.validate)
+ draw->pipeline.validate->destroy( draw->pipeline.validate );
+ if (draw->pipeline.aaline)
+ draw->pipeline.aaline->destroy( draw->pipeline.aaline );
+ if (draw->pipeline.aapoint)
+ draw->pipeline.aapoint->destroy( draw->pipeline.aapoint );
+ if (draw->pipeline.pstipple)
+ draw->pipeline.pstipple->destroy( draw->pipeline.pstipple );
+ if (draw->pipeline.rasterize)
+ draw->pipeline.rasterize->destroy( draw->pipeline.rasterize );
+}
+
+
+
+
+
+
+
+static void do_point( struct draw_context *draw,
+ const char *v0 )
+{
+ struct prim_header prim;
+
+ prim.reset_line_stipple = 0;
+ prim.edgeflags = 1;
+ prim.pad = 0;
+ prim.v[0] = (struct vertex_header *)v0;
+
+ draw->pipeline.first->point( draw->pipeline.first, &prim );
+}
+
+
+static void do_line( struct draw_context *draw,
+ const char *v0,
+ const char *v1 )
+{
+ struct prim_header prim;
+
+ prim.reset_line_stipple = 1; /* fixme */
+ prim.edgeflags = 1;
+ prim.pad = 0;
+ prim.v[0] = (struct vertex_header *)v0;
+ prim.v[1] = (struct vertex_header *)v1;
+
+ draw->pipeline.first->line( draw->pipeline.first, &prim );
+}
+
+
+static void do_triangle( struct draw_context *draw,
+ char *v0,
+ char *v1,
+ char *v2 )
+{
+ struct prim_header prim;
+
+ prim.v[0] = (struct vertex_header *)v0;
+ prim.v[1] = (struct vertex_header *)v1;
+ prim.v[2] = (struct vertex_header *)v2;
+ prim.reset_line_stipple = 1;
+ prim.edgeflags = ((prim.v[0]->edgeflag) |
+ (prim.v[1]->edgeflag << 1) |
+ (prim.v[2]->edgeflag << 2));
+ prim.pad = 0;
+
+ draw->pipeline.first->tri( draw->pipeline.first, &prim );
+}
+
+
+
+
+/* Code to run the pipeline on a fairly arbitary collection of vertices.
+ *
+ * Vertex headers must be pre-initialized with the
+ * UNDEFINED_VERTEX_ID, this code will cause that id to become
+ * overwritten, so it may have to be reset if there is the intention
+ * to reuse the vertices.
+ *
+ * This code provides a callback to reset the vertex id's which the
+ * draw_vbuf.c code uses when it has to perform a flush.
+ */
+void draw_pipeline_run( struct draw_context *draw,
+ unsigned prim,
+ struct vertex_header *vertices,
+ unsigned vertex_count,
+ unsigned stride,
+ const ushort *elts,
+ unsigned count )
+{
+ char *verts = (char *)vertices;
+ unsigned i;
+
+ draw->pipeline.verts = verts;
+ draw->pipeline.vertex_stride = stride;
+ draw->pipeline.vertex_count = vertex_count;
+
+ switch (prim) {
+ case PIPE_PRIM_POINTS:
+ for (i = 0; i < count; i++)
+ do_point( draw,
+ verts + stride * elts[i] );
+ break;
+ case PIPE_PRIM_LINES:
+ for (i = 0; i+1 < count; i += 2)
+ do_line( draw,
+ verts + stride * elts[i+0],
+ verts + stride * elts[i+1]);
+ break;
+ case PIPE_PRIM_TRIANGLES:
+ for (i = 0; i+2 < count; i += 3)
+ do_triangle( draw,
+ verts + stride * elts[i+0],
+ verts + stride * elts[i+1],
+ verts + stride * elts[i+2]);
+ break;
+ }
+
+ draw->pipeline.verts = NULL;
+ draw->pipeline.vertex_count = 0;
+}
+
+
+
+void draw_pipeline_flush( struct draw_context *draw,
+ unsigned flags )
+{
+ draw->pipeline.first->flush( draw->pipeline.first, flags );
+ draw->pipeline.first = draw->pipeline.validate;
+}
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