Added a uniform buffer abstraction class

May get some more methods later, this is just a start to get going.

src/CMakeLists.txt

@@ -1013,6 +1013,7 @@ set (PCH_SOURCES
 	gl/compatibility/gl_20.cpp
 	gl/compatibility/gl_swshader20.cpp
 	gl/data/gl_vertexbuffer.cpp
+	gl/data/gl_uniformbuffer.cpp
 	gl/dynlights/gl_lightbuffer.cpp
 	gl/dynlights/gl_shadowmap.cpp
 	gl/models/gl_models.cpp
@@ -1061,7 +1062,7 @@ set (PCH_SOURCES
 	hwrenderer/utility/hw_clock.cpp
 	hwrenderer/utility/hw_cvars.cpp
 	hwrenderer/utility/hw_lighting.cpp
-	
+
 	menu/joystickmenu.cpp
 	menu/loadsavemenu.cpp
 	menu/menu.cpp

src/gl/data/gl_uniformbuffer.cpp

@@ -0,0 +1,73 @@
+//
+//---------------------------------------------------------------------------
+//
+// Copyright(C) 2018 Christoph Oelckers
+// All rights reserved.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see http://www.gnu.org/licenses/
+//
+//--------------------------------------------------------------------------
+//
+/*
+** gl_uniformbuffer.cpp
+** Uniform buffer abstraction class.
+**
+**/
+
+
+#include "gl_load/gl_system.h"
+#include "gl_load/gl_interface.h"
+#include "gl_uniformbuffer.h"
+
+
+//==========================================================================
+//
+//
+//
+//==========================================================================
+
+GLUniformBuffer::GLUniformBuffer(size_t size, bool staticdraw)
+: IUniformBuffer(size), mStaticDraw(staticdraw)
+{
+	glGenBuffers(1, &mBufferId);
+}
+
+//==========================================================================
+//
+//
+//
+//==========================================================================
+
+GLUniformBuffer::~GLUniformBuffer()
+{
+	if (mBufferId != 0)
+	{
+		glDeleteBuffers(1, &mBufferId);
+	}
+}
+
+//==========================================================================
+//
+//
+//
+//==========================================================================
+
+void GLUniformBuffer::SetData(const void *data)
+{
+	if (mBufferId != 0)
+	{
+		glBindBuffer(GL_UNIFORM_BUFFER, mBufferId);
+		glBufferData(GL_UNIFORM_BUFFER, size, data, mStaticDraw? GL_STATIC_DRAW : GL_STREAM_DRAW);
+	}
+}

src/gl/data/gl_uniformbuffer.h

@@ -0,0 +1,24 @@
+#pragma once
+
+#include <stdlib.h>
+#include "hwrenderer/data/uniformbuffer.h"
+
+
+class GLUniformBuffer : public IUniformBuffer
+{
+	unsigned mBufferId;
+	bool mStaticDraw;
+
+protected:
+	GLUniformBuffer(size_t size, bool staticdraw = false);
+	~GLUniformBuffer();
+
+	void Bind() override;
+	void SetData(const void *data) override;
+
+	unsigned ID() const
+	{
+		return mBufferId;
+	}
+
+}

src/hwrenderer/data/uniformbuffer.h

@@ -0,0 +1,17 @@
+#pragma once
+
+#include "zstring.h"
+
+class IUniformBuffer
+{
+protected:
+	size_t mSize;
+
+	IUniformBuffer(size_t size) : mSize(size) {}
+
+public:
+	virtual ~IUniformBuffer() {}
+	virtual void SetData(const void *data) = 0;
+
+
+};