ShaderLibrary.h

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// Copyright (c) 2025 Dave R. Smith. All rights reserved.
// Malena Framework — Proprietary Software. See LICENSE for terms.
 
//
// ShaderLibrary.h
//
 
#ifndef MALENA_SHADERLIBRARY_H
#define MALENA_SHADERLIBRARY_H
 
#include <Malena/Core/malena_export.h>
#include <string_view>
#include <SFML/Graphics.hpp>
#include <functional>
 
namespace ml
{
    class MALENA_API ShaderLibrary
    {
    public:
        struct Params
        {
            // ── Position / center ────────────────────────────────────────────
            float centerX = 0.5f;     
            float centerY = 0.5f;     
 
            // ── Scale ────────────────────────────────────────────────────────
            float minScale   = 0.6f;  
            float maxScale   = 1.5f;  
            float scaleWidth = 0.3f;  
 
            // ── Blur ─────────────────────────────────────────────────────────
            float blurAmount = 2.0f;  
            float focusWidth = 0.2f;  
 
            // ── Color ─────────────────────────────────────────────────────────
            sf::Glsl::Vec3 tintColor    = {1.0f, 0.8f, 0.6f}; 
            sf::Glsl::Vec3 glowColor    = {1.0f, 1.0f, 0.8f}; 
            float          tintStrength = 0.3f; 
            float          glowStrength = 0.3f; 
 
            // ── Fade / vignette ───────────────────────────────────────────────
            float fadeWidth = 50.0f;  
            float strength  = 0.5f;   
            float radius    = 0.8f;   
 
            // ── 3D / perspective ──────────────────────────────────────────────
            float perspective    = 0.8f; 
            float rotationAngle  = 0.5f; 
            float skewAmount     = 0.3f; 
 
            // ── Animation ─────────────────────────────────────────────────────
            float time        = 0.0f;  
            float amplitude   = 0.02f; 
            float frequency   = 10.0f; 
            float pulseSpeed  = 2.0f;  
            float pulseAmount = 0.05f; 
 
            // ── Miscellaneous ─────────────────────────────────────────────────
            float parallaxStrength  = 0.1f;  
            float reflectionHeight  = 0.5f;  
            float reflectionAlpha   = 0.4f;  
            float colorWidth        = 0.25f; 
            float intensity         = 0.8f;  
            float glowWidth         = 0.3f;  
 
            // ── Auto-updated by Carousel ──────────────────────────────────────
            sf::Vector2f textureSize = {720.0f, 480.0f}; 
            float        totalWidth  = 720.0f;            
        };

        enum class Style
        {
            DEFAULT,
            FADE_EDGES,
            BLUR_UNFOCUSED,
            COVERFLOW_3D,
            COLOR_TINT,
            WAVE_DISTORTION,
            DEPTH_OF_FIELD,
            SCALE_CENTER,
            VIGNETTE,
            GRAYSCALE_EDGES,
            REFLECTION,
            ROTATION_3D,
            PARALLAX,
            GLOW_CENTER,
            SLIDE_ANGLE,
            SEPIA_TONE,
            ZOOM_PULSE,
            CUSTOM
        };
 
        // ── GLSL source getters ───────────────────────────────────────────────

        static std::string_view fadeEdges();
        static std::string_view scaleCenter();
        static std::string_view blurUnfocused();
        static std::string_view coverflow3D();
        static std::string_view colorTint();
        static std::string_view waveDistortion();
        static std::string_view depthOfField();
        static std::string_view vignette();
        static std::string_view grayscaleEdges();
        static std::string_view reflection();
        static std::string_view rotation3D();
        static std::string_view parallax();
        static std::string_view glowCenter();
        static std::string_view slideAngle();
        static std::string_view sepiaTone();
        static std::string_view zoomPulse();

        static void applyUniforms(sf::Shader& shader, Style style, const Params& params);
    };
 
} // namespace ml
 
#endif // MALENA_SHADERLIBRARY_H