SdfAtlas.hpp

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#pragma once
 
#include "SdfFont.hpp"
 
#include <SDL3/SDL.h>
 
#include <glm/glm.hpp>
 
class SdfAtlas
{
public:
    static constexpr int k_atlasW = 1024;
    static constexpr int k_atlasH = 1024;
    static constexpr int k_renderPx = 48; 
    static constexpr int k_spread = 8;    
 
    bool init(SDL_GPUDevice* dev, const char* ttfPath);
 
    void quit();
 
    [[nodiscard]] const GlyphInfo* glyph(uint32_t codepoint) const;
 
    void bindFragment(SDL_GPURenderPass* pass, uint32_t slot) const;
 
    [[nodiscard]] float scale() const { return scale_; }
 
    [[nodiscard]] bool ready() const { return texture_ != nullptr; }
 
    [[nodiscard]] SDL_GPUTexture* gpuTexture() const { return texture_; }
 
    [[nodiscard]] SDL_GPUSampler* gpuSampler() const { return sampler_; }
 
private:
    SDL_GPUDevice* device_ = nullptr;
    SDL_GPUTexture* texture_ = nullptr;
    SDL_GPUSampler* sampler_ = nullptr;
    GlyphMap glyphs_;
    float scale_ = 1.f;
};