AntiAliasing.h

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#pragma once
 
#include <string>
 
namespace eve::graphics {
 
class Canvas;
class Graphics;
class Shader;
class Texture;
 
class AntiAliasing {
public:
    explicit AntiAliasing(Graphics *gfx);
    ~AntiAliasing();
 
    AntiAliasing(const AntiAliasing &) = delete;
    AntiAliasing &operator=(const AntiAliasing &) = delete;
 
    void setQuality(const std::string &quality);
    std::string getQuality() const { return quality_; }
 
    void setMode(const std::string &mode);
    std::string getMode() const { return mode_; }
 
    bool hasParam(const std::string &name) const;
    void setFloat(const std::string &name, float value);
    float getFloat(const std::string &name) const;
 
    float suggestScale() const;
 
    int resolutionFor(int destSize) const;
 
    void apply(Graphics *gfx, Texture *source);
    void applyTo(Graphics *gfx, Texture *source, Canvas *dest);
 
    void applyCanvas(Graphics *gfx, Canvas *source);
    void applyCanvasTo(Graphics *gfx, Canvas *source, Canvas *dest);
 
    void prepareSource(Texture *source);
 
    Shader *getFxaaShader() const { return fxaa_; }
    Shader *getSmaaShader() const { return smaa_; }
    Shader *getSsaaShader() const { return ssaa_; }
    Shader *getNfaaShader() const { return nfaa_; }
    Shader *getShader() const;
 
private:
    void applyQualityDefaults();
    void uploadScreenUniforms(Texture *source);
    void drawFullscreen(Graphics *gfx, Texture *source, Shader *shader);
    Shader *shaderForMode() const;
 
    Graphics *gfx_ = nullptr;  // not owned
    Shader *fxaa_ = nullptr;   // owned by Graphics
    Shader *smaa_ = nullptr;
    Shader *ssaa_ = nullptr;
    Shader *nfaa_ = nullptr;
    std::string quality_ = "medium";
    std::string mode_ = "fxaa";
};
 
}  // namespace eve::graphics