This is the O3D source tree's initial commit to the Chromium tree. It

is not built or referenced at all by the chrome build yet, and doesn't 
yet build in it's new home.  We'll change that shortly.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@17035 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 120 insertions, 0 deletions

diff --git a/o3d/core/cross/draw_context.h b/o3d/core/cross/draw_context.h
new file mode 100644
index 0000000..ed29c6b
--- /dev/null
+++ b/o3d/core/cross/draw_context.h
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+/*
+ * Copyright 2009, 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.
+ */
+
+
+// This file contains declarations for the DrawContext class.  This class
+// contains two pre-defined Parameters: o3d.view, for the viewing
+// matrix, and o3d.projection, for the projection matrix.  There
+// are convenience funtions for accessing these without looking them up
+// by name.  These matrices are used by StandardParamMatrix4s, to implement
+// the SAS transform semantics.  In addition, any user-defined
+// parameters added to the DrawContext will be made "global", ie.,
+// linked to all Shapes containing parameters of the same name, by
+// Node::GenerateRenderTreeGroup().
+
+#ifndef O3D_CORE_CROSS_DRAW_CONTEXT_H_
+#define O3D_CORE_CROSS_DRAW_CONTEXT_H_
+
+#include "core/cross/param_object.h"
+
+namespace o3d {
+
+class DrawContext : public ParamObject {
+ public:
+  typedef SmartPointer<DrawContext> Ref;
+  typedef WeakPointer<DrawContext> WeakPointerType;
+
+  static const char* kViewParamName;
+  static const char* kProjectionParamName;
+
+  // Gets the view matrix.
+  const Matrix4 view() const {
+    return view_param_->value();
+  }
+
+  // Sets the view matrix.
+  void set_view(const Matrix4& value) {
+    view_param_->set_value(value);
+  }
+
+  // Gets the projection matrix.
+  const Matrix4 projection() const {
+    return projection_param_->value();
+  }
+
+  // Sets the projection matrix.
+  void set_projection(const Matrix4& value) {
+    projection_param_->set_value(value);
+  }
+
+  // Gets a weak pointer to us.
+  WeakPointerType GetWeakPointer() const {
+    return weak_pointer_manager_.GetWeakPointer();
+  }
+
+ private:
+  explicit DrawContext(ServiceLocator* service_locator);
+
+  friend class IClassManager;
+  static ObjectBase::Ref Create(ServiceLocator* service_locator);
+
+  // Predefined view matrix parameter.
+  ParamMatrix4::Ref view_param_;
+
+  // Predefined projection matrix parameter.
+  ParamMatrix4::Ref projection_param_;
+
+  // Manager for weak pointers to us.
+  WeakPointerType::WeakPointerManager weak_pointer_manager_;
+
+  O3D_DECL_CLASS(DrawContext, ParamObject)
+  DISALLOW_COPY_AND_ASSIGN(DrawContext);
+};
+
+class ParamDrawContext : public TypedRefParam<DrawContext> {
+ public:
+  typedef SmartPointer<ParamDrawContext> Ref;
+
+  ParamDrawContext(ServiceLocator* service_locator,
+                   bool dynamic,
+                   bool read_only)
+      : TypedRefParam<DrawContext>(service_locator, dynamic, read_only) {}
+
+ private:
+  friend class IClassManager;
+  static ObjectBase::Ref Create(ServiceLocator* service_locator);
+
+  O3D_DECL_CLASS(ParamDrawContext, RefParamBase)
+};
+
+}  // namespace o3d
+
+#endif  // O3D_CORE_CROSS_DRAW_CONTEXT_H_