ImageView.h

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#pragma once
 
#include <cstddef>
#include <cstdint>
 
#include "cdc_core/Raii.h"
#include "cdc_image/MonoBitmap.h"
#include "cdc_ui/IView.h"
 
namespace cdc::ui {

class ImageView : public ViewBase {
public:
    static constexpr uint32_t MAX_PIXELS = 1048576;  

    void init(const char* title, const uint8_t* data, size_t len);
 
    void render(bool partial) override;
    InputResult onKey(char key) override;
    void onExit() override;
    const char* getName() const override { return "ImageView"; }
    const char* getFooterHint() const override;

    hal::RefreshMode preferredEnterRefresh() const override { return hal::RefreshMode::FULL; }
 
private:
    enum class Mode : uint8_t { Fit, Actual };
    static constexpr uint16_t MAX_TITLE_LEN = 64;
    static constexpr int PAN_STEP = 24;
 
    char titleBuf_[MAX_TITLE_LEN];
    const char* errorKey_ = nullptr;
    cdc::core::PsramUniquePtr<uint8_t> fitBits_;
    cdc::core::PsramUniquePtr<uint8_t> fullBits_;
    cdc::image::MonoBitmap fitBmp_;
    cdc::image::MonoBitmap fullBmp_;
    Mode mode_ = Mode::Fit;
    int panX_ = 0;
    int panY_ = 0;
 
    void clampPan();
};

ImageView* showImage(const char* title, const uint8_t* data, size_t len);
 
} // namespace cdc::ui