path: root/src/safeopenglgraphics.h

/*
 *  The ManaPlus Client
 *  Copyright (C) 2004-2009  The Mana World Development Team
 *  Copyright (C) 2009-2010  The Mana Developers
 *  Copyright (C) 2011-2012  The ManaPlus Developers
 *
 *  This file is part of The ManaPlus Client.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef SAFEOPENGLGRAPHICS_H
#define SAFEOPENGLGRAPHICS_H

#include "main.h"
#if defined USE_OPENGL && !defined ANDROID

#include "graphics.h"

#include "resources/fboinfo.h"

#ifdef ANDROID
#include <GLES/gl.h>
#include <GLES/glext.h>
#else
#define GL_GLEXT_PROTOTYPES 1
#include <SDL_opengl.h>
#include <GL/glext.h>
#endif

class SafeOpenGLGraphics final : public Graphics
{
    public:
        SafeOpenGLGraphics();

        A_DELETE_COPY(SafeOpenGLGraphics)

        ~SafeOpenGLGraphics();

        bool setVideoMode(const int w, const int h, const int bpp,
                          const bool fs, const bool hwaccel,
                          const bool resize, const bool noFrame) override;

        /**
         * Draws a resclaled version of the image
         */
        bool drawRescaledImage(const Image *const image, int srcX, int srcY,
                               int dstX, int dstY,
                               const int width, const int height,
                               const int desiredWidth, const int desiredHeight,
                               const bool useColor) override;

        /**
         * Used to get the smooth rescale option over the standard function.
         */
        bool drawRescaledImage(const Image *const image, int srcX, int srcY,
                               int dstX, int dstY,
                               const int width, const int height,
                               const int desiredWidth, const int desiredHeight,
                               const bool useColor, bool smooth);

        void drawImagePattern(const Image *const image,
                              const int x, const int y,
                              const int w, const int h) override;

        /**
         * Draw a pattern based on a rescaled version of the given image...
         */
        void drawRescaledImagePattern(const Image *const image,
                                      const int x, const int y,
                                      const int w, const int h,
                                      const int scaledWidth,
                                      const int scaledHeight) override;

        void calcTile(ImageVertexes *const vert, const Image *const image,
                      int x, int y) const override;

        void calcTile(ImageCollection *const vertCol,
                      const Image *const image, int x, int y) override;

        void drawTile(const ImageVertexes *const vert) override;

        void updateScreen() override;

        void _beginDraw();

        void _endDraw();

        bool pushClipArea(gcn::Rectangle area);

        void popClipArea();

        void setColor(const gcn::Color &color)
        {
            mColor = color;
            mColor2 = color;
            mColorAlpha = (color.a != 255);
        }

        void drawPoint(int x, int y);

        void drawLine(int x1, int y1, int x2, int y2);

        void drawRectangle(const gcn::Rectangle &rect, const bool filled);

        void drawRectangle(const gcn::Rectangle &rect);

        void fillRectangle(const gcn::Rectangle &rect) override;

        void setTargetPlane(int width, int height);

        /**
         * Takes a screenshot and returns it as SDL surface.
         */
        SDL_Surface *getScreenshot() override A_WARN_UNUSED;

        void prepareScreenshot() override;

        static void bindTexture(GLenum target, GLuint texture);

        static GLuint mLastImage;

    protected:
        bool drawImage2(const Image *const image,
                        int srcX, int srcY,
                        int dstX, int dstY,
                        const int width, const int height,
                        const bool useColor);

        void setTexturingAndBlending(bool enable);

    private:
        void inline setColorAlpha(float alpha);

        void inline restoreColor();

        bool mAlpha;
        bool mTexture;
        bool mIsByteColor;
        gcn::Color mByteColor;
        float mFloatColor;
        bool mColorAlpha;
        FBOInfo mFbo;
};
#endif

#endif