--- /dev/null
+/**************************************************************************
+ *
+ * Copyright 2013 VMware, Inc.
+ * 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 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.
+ *
+ **************************************************************************/
+
+#include "draw_prim_assembler.h"
+
+#include "util/u_debug.h"
+#include "util/u_memory.h"
+#include "util/u_prim.h"
+
+#include "pipe/p_defines.h"
+
+struct draw_assembler
+{
+ struct draw_context *draw;
+
+ struct draw_prim_info *output_prims;
+ struct draw_vertex_info *output_verts;
+
+ const struct draw_prim_info *input_prims;
+ const struct draw_vertex_info *input_verts;
+};
+
+boolean
+draw_prim_assembler_is_required(const struct draw_context *draw,
+ const struct draw_prim_info *prim_info,
+ const struct draw_vertex_info *vert_info)
+{
+ switch (prim_info->prim) {
+ case PIPE_PRIM_LINES_ADJACENCY:
+ case PIPE_PRIM_LINE_STRIP_ADJACENCY:
+ case PIPE_PRIM_TRIANGLES_ADJACENCY:
+ case PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY:
+ return TRUE;
+ default:
+ return FALSE;
+ }
+}
+
+/*
+ * Copy the vertex header along with its data from the current
+ * vertex buffer into a buffer holding vertices arranged
+ * into decomposed primitives (i.e. buffer without the
+ * adjacency vertices)
+ */
+static void
+copy_verts(struct draw_assembler *asmblr,
+ unsigned *indices, unsigned num_indices)
+{
+ unsigned i;
+
+ char *output = (char*)asmblr->output_verts->verts;
+ const char *input = (const char*)asmblr->input_verts->verts;
+
+ for (i = 0; i < num_indices; ++i) {
+ unsigned idx = indices[i];
+ unsigned output_offset =
+ asmblr->output_verts->count * asmblr->output_verts->stride;
+ unsigned input_offset = asmblr->input_verts->stride * idx;
+ memcpy(output + output_offset, input + input_offset,
+ asmblr->input_verts->vertex_size);
+ asmblr->output_verts->count += 1;
+ }
+}
+
+static void
+prim_point(struct draw_assembler *asmblr,
+ unsigned idx)
+{
+ unsigned indices[1];
+
+ indices[0] = idx;
+
+ copy_verts(asmblr, indices, 1);
+}
+
+static void
+prim_line(struct draw_assembler *asmblr,
+ unsigned i0, unsigned i1)
+{
+ unsigned indices[2];
+
+ indices[0] = i0;
+ indices[1] = i1;
+
+ copy_verts(asmblr, indices, 2);
+}
+
+static void
+prim_line_adj(struct draw_assembler *asmblr,
+ unsigned i0, unsigned i1, unsigned i2, unsigned i3)
+{
+ unsigned indices[2];
+
+ indices[0] = i1;
+ indices[1] = i2;
+
+ copy_verts(asmblr, indices, 2);
+}
+
+static void
+prim_tri(struct draw_assembler *asmblr,
+ unsigned i0, unsigned i1, unsigned i2)
+{
+ unsigned indices[3];
+
+ indices[0] = i0;
+ indices[1] = i1;
+ indices[2] = i2;
+
+ copy_verts(asmblr, indices, 3);
+}
+
+static void
+prim_tri_adj(struct draw_assembler *asmblr,
+ unsigned i0, unsigned i1, unsigned i2,
+ unsigned i3, unsigned i4, unsigned i5)
+{
+ unsigned indices[3];
+
+ indices[0] = i0;
+ indices[1] = i2;
+ indices[2] = i4;
+
+ copy_verts(asmblr, indices, 3);
+}
+
+
+
+#define FUNC assembler_run_linear
+#define GET_ELT(idx) (start + (idx))
+#include "draw_prim_assembler_tmp.h"
+
+#define FUNC assembler_run_elts
+#define LOCAL_VARS const ushort *elts = input_prims->elts;
+#define GET_ELT(idx) (elts[start + (idx)])
+#include "draw_prim_assembler_tmp.h"
+
+
+
+/*
+ * Primitive assembler breaks up adjacency primitives and assembles
+ * the base primitives they represent, e.g. vertices forming
+ * PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY
+ * become vertices forming PIPE_PRIM_TRIANGLES
+ * This is needed because specification says that the adjacency
+ * primitives are only visible in the geometry shader so we need
+ * to get rid of them so that the rest of the pipeline can
+ * process the inputs.
+ */
+void
+draw_prim_assembler_run(struct draw_context *draw,
+ const struct draw_prim_info *input_prims,
+ const struct draw_vertex_info *input_verts,
+ struct draw_prim_info *output_prims,
+ struct draw_vertex_info *output_verts)
+{
+ struct draw_assembler asmblr;
+ unsigned start, i;
+ unsigned assembled_prim = u_assembled_prim(input_prims->prim);
+ unsigned max_primitives = u_decomposed_prims_for_vertices(
+ input_prims->prim, input_prims->count);
+ unsigned max_verts = u_vertices_per_prim(assembled_prim) * max_primitives;
+
+ asmblr.draw = draw;
+ asmblr.output_prims = output_prims;
+ asmblr.output_verts = output_verts;
+ asmblr.input_prims = input_prims;
+ asmblr.input_verts = input_verts;
+
+ output_prims->linear = TRUE;
+ output_prims->elts = NULL;
+ output_prims->start = 0;
+ output_prims->prim = u_assembled_prim(input_prims->prim);
+ output_prims->flags = 0x0;
+ output_prims->primitive_lengths = MALLOC(sizeof(unsigned));
+ output_prims->primitive_lengths[0] = 0;
+ output_prims->primitive_count = 1;
+
+ output_verts->vertex_size = input_verts->vertex_size;
+ output_verts->stride = input_verts->stride;
+ output_verts->verts = (struct vertex_header*)MALLOC(
+ input_verts->vertex_size * max_verts);
+ output_verts->count = 0;
+
+
+ for (start = i = 0; i < input_prims->primitive_count;
+ start += input_prims->primitive_lengths[i], i++)
+ {
+ unsigned count = input_prims->primitive_lengths[i];
+ if (input_prims->linear) {
+ assembler_run_linear(&asmblr, input_prims, input_verts,
+ start, count);
+ } else {
+ assembler_run_elts(&asmblr, input_prims, input_verts,
+ start, count);
+ }
+ }
+
+ output_prims->primitive_lengths[0] = output_verts->count;
+ output_prims->count = output_verts->count;
+}
projects / mesa.git / blobdiff