redquark-amiberry-rb/external/libguisan/include/guisan/sdl/sdl2graphics.hpp

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 * Copyright (c) 2004, 2005, 2006, 2007 Olof Naessén and Per Larsson
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#ifndef GCN_SDL2GRAPHICS_HPP
#define GCN_SDL2GRAPHICS_HPP

#include "SDL.h"

#include "guisan/color.hpp"
#include "guisan/graphics.hpp"
#include "guisan/platform.hpp"

namespace gcn
{
    class Image;
    class Rectangle;

    /**
     * SDL implementation of the Graphics.
     */
    class GCN_EXTENSION_DECLSPEC SDL2Graphics : public Graphics
    {
    public:

        // Needed so that drawImage(gcn::Image *, int, int) is visible.
        using Graphics::drawImage;

        /**
         * Constructor.
         */
        SDL2Graphics();
        
        /**
         * Destructor.
         */
        ~SDL2Graphics();
        
        /**
         *  Sets the target SDL_Renderer to use for drawing. Preferably done only once. 
         *  
         *  @param renderer the SDL_Renderer to use for drawing.
         *  @param width screen width
         *  @param height screen height
         */
        virtual void setTarget(SDL_Renderer* renderer, int width, int height);
        
        /**
         * Gets the target SDL_Renderer.
         *
         * @return the target SDL_Renderer.
         */
        [[nodiscard]] virtual SDL_Renderer* getTarget() const;

        /**
         * Draws an SDL_Surface on the target surface. Normally you'll
         * use drawImage, but if you want to write SDL specific code
         * this function might come in handy.
         *
         * NOTE: The clip areas will be taken into account.
         */
        virtual void drawSDLSurface(SDL_Surface* surface, SDL_Rect source,
                                    SDL_Rect destination);

        /**
         * Draws an SDL_Texture on the target surface. Normally you'll
         * use drawImage, but if you want to write SDL specific code
         * this function might come in handy.
         *
         * NOTE: The clip areas will be taken into account.
         */
        virtual void drawSDLTexture(SDL_Texture* texture, SDL_Rect source,
                                    SDL_Rect destination);

        // Inherited from Graphics

        virtual void _beginDraw();

        virtual void _endDraw();

        virtual bool pushClipArea(Rectangle area);

        virtual void popClipArea();

        virtual void drawImage(const Image* image, int srcX, int srcY,
                               int dstX, int dstY, int width,
                               int height);

        virtual void drawPoint(int x, int y);

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

        virtual void drawRectangle(const Rectangle& rectangle);

        virtual void fillRectangle(const Rectangle& rectangle);

        virtual void setColor(const Color& color);

        virtual const Color& getColor();

    protected:
        /**
         * Draws a horizontal line.
         *
         * @param x1 the start coordinate of the line.
         * @param y the y coordinate of the line.
         * @param x2 the end coordinate of the line.
         */
        virtual void drawHLine(int x1, int y, int x2);

        /**
         * Draws a vertical line.
         *
         * @param x the x coordinate of the line.
         * @param y1 the start coordinate of the line.
         * @param y2 the end coordinate of the line.
         */
        virtual void drawVLine(int x, int y1, int y2);
        
        /**
         *  Save the current rendering color before drawing.
         *  Does not affect the mColor attribute. 
         */
        virtual void saveRenderColor();
        
        /**
         *  Restore the rendering color after drawing
         */
        virtual void restoreRenderColor();

        SDL_Surface* mTarget{};
        SDL_Renderer* mRenderTarget{};
        SDL_Texture* mTexture{};
        Color mColor;
        Uint8 r{}, g{}, b{}, a{}; //! to store previous color from renderer
        bool mAlpha;
    };
}

#endif // end GCN_SDL2GRAPHICS_HPP