SDLGLOutputSurface.hh

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#ifndef SDLGLOUTPUTSURFACE_HH
#define SDLGLOUTPUTSURFACE_HH

#include "GLUtil.hh"
#include "MemBuffer.hh"
#include <string>

namespace openmsx {

class OutputSurface;

/** This is a common base class for SDLGLVisibleSurface and
  * SDLGLOffScreenSurface. Its only purpose is to have a place to put common
  * code.
  */
class SDLGLOutputSurface
{
public:
        /** These correspond respectively with the renderers:
          *   SDLGL-PP, SDLGL-FB16, SDLGL-FB32
          */
        enum FrameBuffer { FB_NONE, FB_16BPP, FB_32BPP };

        FrameBuffer getFrameBufferType() const { return frameBuffer; }

protected:
        explicit SDLGLOutputSurface(FrameBuffer frameBuffer = FB_NONE);
        ~SDLGLOutputSurface() = default;

        void init(OutputSurface& output);
        void flushFrameBuffer(unsigned width, unsigned height);
        void clearScreen();
        void saveScreenshot(const std::string& filename,
                            const OutputSurface& output) const;

private:
        float texCoordX, texCoordY;
        gl::Texture fbTex;
        MemBuffer<char> fbBuf;
        const FrameBuffer frameBuffer;
};

} // namespace openmsx

#endif