Sharing for buffer, texture and renderbuffer objects.
TRAC #12496
Derive Renderbuffer, Texture and Buffer from RefCountObject.
This class keeps a reference count for all objects that need cross-context
reference counting, and also the object id.
Restructure Renderbuffers to create a wrapper object and a storage object.
Use BindingPointer for all binding points instead of binding by object id.
Signed-off-by: Shannon Woods
Signed-off-by: Daniel Koch
git-svn-id: https://angleproject.googlecode.com/svn/trunk@364 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/src/libGLESv2/RefCountObject.cpp b/src/libGLESv2/RefCountObject.cpp
new file mode 100644
index 0000000..e3fd36e
--- /dev/null
+++ b/src/libGLESv2/RefCountObject.cpp
@@ -0,0 +1,51 @@
+//
+// Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// RefCountObject.cpp: Defines the gl::RefCountObject base class that provides
+// lifecycle support for GL objects using the traditional BindObject scheme, but
+// that need to be reference counted for correct cross-context deletion.
+// (Concretely, textures, buffers and renderbuffers.)
+
+#include "RefCountObject.h"
+
+namespace gl
+{
+
+RefCountObject::RefCountObject(GLuint id)
+{
+ mId = id;
+ mRefCount = 0;
+}
+
+RefCountObject::~RefCountObject()
+{
+}
+
+void RefCountObject::addRef() const
+{
+ mRefCount++;
+}
+
+void RefCountObject::release() const
+{
+ ASSERT(mRefCount > 0);
+
+ if (--mRefCount == 0)
+ {
+ delete this;
+ }
+}
+
+void RefCountObjectBindingPointer::set(RefCountObject *newObject)
+{
+ // addRef first in case newObject == mObject and this is the last reference to it.
+ if (newObject != NULL) newObject->addRef();
+ if (mObject != NULL) mObject->release();
+
+ mObject = newObject;
+}
+
+}