UniformBuffer: wraps around the GL calls needed to have a UBO

Will be used by the RenderShaderData internally to map the CPU side buffer to
the GPU side Uniform Buffer Object.

Change-Id: I6b8ffdbff49d806bb8668df81ec59872feafe611
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

1 files changed, 81 insertions, 0 deletions

diff --git a/src/render/io/uniformbuffer_p.h b/src/render/io/uniformbuffer_p.h
new file mode 100644
index 000000000..2cc2f0a64
--- /dev/null
+++ b/src/render/io/uniformbuffer_p.h
@@ -0,0 +1,81 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt3D module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QT3D_RENDER_UNIFORMBUFFER_P_H
+#define QT3D_RENDER_UNIFORMBUFFER_P_H
+
+#include <QOpenGLContext>
+
+QT_BEGIN_NAMESPACE
+
+namespace Qt3D {
+
+namespace Render {
+
+class QGraphicsContext;
+
+class UniformBuffer
+{
+public:
+    UniformBuffer();
+
+    void bind(QGraphicsContext *ctx);
+    void create(QGraphicsContext *ctx);
+    void destroy(QGraphicsContext *ctx);
+    void allocate(QGraphicsContext *ctx, uint size, bool dynamic = true);
+    void update(QGraphicsContext *ctx, const void *data, uint size);
+    void bindToUniformBlock(QGraphicsContext *ctx, int bindingPoint);
+
+    inline GLuint bufferId() const { return m_bufferId; }
+    inline bool isCreated() const { return m_isCreated; }
+
+private:
+    GLuint m_bufferId;
+    bool m_isCreated;
+};
+
+} // Render
+
+} // Qt3D
+
+QT_END_NAMESPACE
+
+#endif // QT3D_RENDER_UNIFORMBUFFER_P_H