Added the bulk of the algorithm for GPU accelerated 2D vector curve...

core/cross/gpu2d/path_cache.cc

+/*
+ * Copyright 2010, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "core/cross/gpu2d/path_cache.h"
+
+namespace o3d {
+namespace gpu2d {
+
+unsigned int PathCache::num_vertices() const {
+  return vertices_.size() / 2;
+}
+
+const float* PathCache::vertices() const {
+  if (num_vertices() == 0)
+    return NULL;
+  return &vertices_.front();
+}
+
+const float* PathCache::texcoords() const {
+  if (num_vertices() == 0)
+    return NULL;
+  return &texcoords_.front();
+}
+
+void PathCache::AddVertex(float x, float y,
+                          float k, float l, float m) {
+  vertices_.push_back(x);
+  vertices_.push_back(y);
+  texcoords_.push_back(k);
+  texcoords_.push_back(l);
+  texcoords_.push_back(m);
+}
+
+void PathCache::Clear() {
+  vertices_.clear();
+  texcoords_.clear();
+  interior_vertices_.clear();
+#ifdef O3D_CORE_CROSS_GPU2D_PATH_CACHE_DEBUG_INTERIOR_EDGES
+  interior_edge_vertices_.clear();
+#endif  // O3D_CORE_CROSS_GPU2D_PATH_CACHE_DEBUG_INTERIOR_EDGES
+}
+
+unsigned int PathCache::num_interior_vertices() const {
+  return interior_vertices_.size() / 2;
+}
+
+const float* PathCache::interior_vertices() const {
+  if (num_interior_vertices() == 0)
+    return NULL;
+  return &interior_vertices_.front();
+}
+
+void PathCache::AddInteriorVertex(float x, float y) {
+  interior_vertices_.push_back(x);
+  interior_vertices_.push_back(y);
+}
+
+#ifdef O3D_CORE_CROSS_GPU2D_PATH_CACHE_DEBUG_INTERIOR_EDGES
+unsigned int PathCache::num_interior_edge_vertices() const {
+  return interior_edge_vertices_.size() / 2;
+}
+
+const float* PathCache::interior_edge_vertices() const {
+  if (num_interior_edge_vertices() == 0)
+    return NULL;
+  return &interior_edge_vertices_.front();
+}
+
+void PathCache::AddInteriorEdgeVertex(float x, float y) {
+  interior_edge_vertices_.push_back(x);
+  interior_edge_vertices_.push_back(y);
+}
+#endif  // O3D_CORE_CROSS_GPU2D_PATH_CACHE_DEBUG_INTERIOR_EDGES
+
+}  // namespace gpu2d
+}  // namespace o3d
+