OAG Library (OpenGL) Part 2.3 - Drawing 2D Textures Using the Mouse and Programatically

/*
 * FTGL - OpenGL font library
 *
 * Copyright (c) 2008 Sam Hocevar <sam@zoy.org>
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#ifndef __FTBuffer__
#define __FTBuffer__

#include "FTpoint.h"

/**
 * FTBuffer is a helper class for pixel buffers.
 *
 * It provides the interface between FTBufferFont and FTBufferGlyph to
 * optimise rendering operations.
 *
 * @see FTBufferGlyph
 * @see FTBufferFont
 */
class FTBuffer
{
    public:
        /**
         * Default constructor.
         */
        FTBuffer();

        /**
         * Destructor
         */
        ~FTBuffer();

        /**
         * Get the pen's position in the buffer.
         *
         * @return  The pen's position as an FTPoint object.
         */
        inline FTPoint Pos() const
        {
            return pos;
        }

        /**
         * Set the pen's position in the buffer.
         *
         * @param arg  An FTPoint object with the desired pen's position.
         */
        inline void Pos(FTPoint arg)
        {
            pos = arg;
        }

        /**
         * Set the buffer's size.
         *
         * @param w  The buffer's desired width, in pixels.
         * @param h  The buffer's desired height, in pixels.
         */
        void Size(int w, int h);

        /**
         * Get the buffer's width.
         *
         * @return  The buffer's width, in pixels.
         */
        inline int Width() const { return width; }

        /**
         * Get the buffer's height.
         *
         * @return  The buffer's height, in pixels.
         */
        inline int Height() const { return height; }

        /**
         * Get the buffer's direct pixel buffer.
         *
         * @return  A read-write pointer to the buffer's pixels.
         */
        inline unsigned char *Pixels() const { return pixels; }

    private:
        /**
         * Buffer's width and height.
         */
        int width, height;

        /**
         * Buffer's pixel buffer.
         */
        unsigned char *pixels;

        /**
         * Buffer's internal pen position.
         */
        FTPoint pos;
};

#endif // __FTBuffer__