matris/Renderer.hpp

#pragma once
#include <SDL2/SDL.h>
#include <vector>
#include <string>
#include "Game.hpp"
#include "Synth.hpp"

struct Particle {
    float x = 0.0f;
    float y = 0.0f;
    float vx = 0.0f;
    float vy = 0.0f;
    float life = 1.0f;      // 1.0 down to 0.0
    float decay = 1.0f;     // decay rate per second
    float size = 4.0f;
    SDL_Color color = {255, 255, 255, 255};
};

struct Star {
    float x = 0.0f;
    float y = 0.0f;
    float speed = 0.0f;
    float size = 0.0f;
    float alpha = 0.0f;
};

class Renderer {
public:
    Renderer();
    ~Renderer();

    bool init(SDL_Renderer* renderer, int targetW, int targetH);
    void update(float dt);
    
    // Master rendering routine
    void render(const Game& game, Synth& synth);
    
    // Spawn effects
    void spawnLineClearParticles(const Game& game);
    void spawnLandDustParticles(int gridX, int gridY, PieceType type);
 
    // Screenshot API
    void takeScreenshot(const std::string& filename);
 
 private:
    SDL_Renderer* mRenderer = nullptr;
    SDL_Texture* mFontTexture = nullptr;
    SDL_Surface* mFontSurface = nullptr;
    SDL_Surface* mBackbufferSurface = nullptr;
    SDL_Surface* mScaledSurface = nullptr;
    SDL_Texture* mBackbufferTexture = nullptr;
 
    int mTargetW = 800;
    int mTargetH = 600;
    float mTime = 0.0f;
    float mShakeIntensity = 0.0f;

    // Drifting starfield
    std::vector<Star> mStars;
    std::vector<Particle> mParticles;

    void initStars();
    void buildFontTexture();

    // Drawing helpers
    void drawText(const std::string& text, int x, int y, int scale, SDL_Color color, bool center = false, bool glow = false);
    void drawBlock(int gridX, int gridY, PieceType type, bool isGhost = false, float alphaOverride = 1.0f);
    void drawGrid(const Game& game);
    void drawUI(const Game& game);
    void drawVisualizer(Synth& synth, int x, int y, int w, int h);

    // Helpers
    SDL_Color getPieceColor(PieceType type);
};