Simple wrapper for OpenGL buffers.

src/Buffer.h

@@ -0,0 +1,149 @@
+#ifndef Magnum_Buffer_h
+#define Magnum_Buffer_h
+/*
+    Copyright © 2010 Vladimír Vondruš <mosra@centrum.cz>
+
+    This file is part of Magnum.
+
+    Magnum is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License version 3
+    only, as published by the Free Software Foundation.
+
+    Magnum 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 version 3 for more details.
+*/
+
+/** @file
+ * @brief Class Magnum::Buffer
+ */
+
+#include "Magnum.h"
+
+namespace Magnum {
+
+/**
+ * @brief Class for managing buffers
+ */
+class Buffer {
+    DISABLE_COPY(Buffer)
+
+    public:
+        /** @brief Buffer type */
+        enum Type {
+            /**
+             * Used for storing vertex attributes.
+             */
+            ArrayBuffer = GL_ARRAY_BUFFER,
+
+            /**
+             * Used for storing vertex indices.
+             */
+            ElementArrayBuffer = GL_ELEMENT_ARRAY_BUFFER
+        };
+
+        /** @brief Buffer usage */
+        enum Usage {
+            /**
+             * Set once by the application and used infrequently for drawing.
+             */
+            DrawStream = GL_STREAM_DRAW,
+
+            /**
+             * Set once as output from an OpenGL command and used infequently
+             * for drawing.
+             */
+            ReadStream = GL_STREAM_READ,
+
+            /**
+             * Set once as output from an OpenGL command and used infrequently
+             * for drawing or copying to other buffers.
+             */
+            CopyStream = GL_STREAM_COPY,
+
+            /**
+             * Set once by the application and used frequently for drawing.
+             */
+            DrawStatic = GL_STATIC_DRAW,
+
+            /**
+             * Set once as output from an OpenGL command and queried many times
+             * by the application.
+             */
+            ReadStatic = GL_STATIC_READ,
+
+            /**
+             * Set once as output from an OpenGL command and used frequently
+             * for drawing or copying to other buffers.
+             */
+            CopyStatic = GL_STATIC_COPY,
+
+            /**
+             * Updated frequently by the application and used frequently
+             * for drawing or copying to other images.
+             */
+            DrawDynamic = GL_DYNAMIC_DRAW,
+
+            /**
+             * Updated frequently as output from OpenGL command and queried
+             * many times from the application.
+             */
+            ReadDynamic = GL_DYNAMIC_READ,
+
+            /**
+             * Updated frequently as output from OpenGL command and used
+             * frequently for drawing or copying to other images.
+             */
+            CopyDynamic = GL_DYNAMIC_COPY
+        };
+
+        /**
+         * @brief Constructor
+         * @param type      Buffer type
+         *
+         * Generates new OpenGL buffer.
+         */
+        inline Buffer(Type type): _type(type) {
+            glGenBuffers(1, &buffer);
+        }
+
+        /**
+         * @brief Destructor
+         *
+         * Deletes associated OpenGL buffer.
+         */
+        inline virtual ~Buffer() {
+            glDeleteBuffers(1, &buffer);
+        }
+
+        /** @brief Bind buffer */
+        inline void bind() {
+            glBindBuffer(_type, buffer);
+        }
+
+        /** @brief Unbind buffer */
+        inline void unbind() {
+            glBindBuffer(_type, 0);
+        }
+
+        /**
+         * @brief Set buffer data
+         * @param size      Data size
+         * @param data      Pointer to data
+         * @param usage     Buffer usage
+         */
+        inline void setData(GLsizeiptr size, const GLvoid* data, Usage usage) {
+            bind();
+            glBufferData(_type, size, data, usage);
+            unbind();
+        }
+
+    private:
+        GLuint buffer;
+        Type _type;
+};
+
+}
+
+#endif