viewer/include/viewer/tess/bitmap_decoder.hpp

#ifndef _RIVE_BITMAP_DECODER_HPP_
#define _RIVE_BITMAP_DECODER_HPP_

#include "rive/rive_types.hpp"
#include "rive/span.hpp"

/// Bitmap will always take ownership of the bytes it is constructed with.
class Bitmap
{
public:
    enum class PixelFormat : uint8_t
    {
        R,
        RGB,
        RGBA
    };

    Bitmap(uint32_t width,
           uint32_t height,
           PixelFormat pixelFormat,
           std::unique_ptr<const uint8_t[]> bytes);

    Bitmap(uint32_t width, uint32_t height, PixelFormat pixelFormat, const uint8_t* bytes);

private:
    uint32_t m_Width;
    uint32_t m_Height;
    PixelFormat m_PixelFormat;
    std::unique_ptr<const uint8_t[]> m_Bytes;

public:
    uint32_t width() const { return m_Width; }
    uint32_t height() const { return m_Height; }
    PixelFormat pixelFormat() const { return m_PixelFormat; }
    const uint8_t* bytes() const { return m_Bytes.get(); }
    size_t byteSize() const;
    size_t byteSize(PixelFormat format) const;
    size_t bytesPerPixel(PixelFormat format) const;

    static std::unique_ptr<Bitmap> decode(rive::Span<const uint8_t> bytes);

    // Change the pixel format (note this will resize bytes).
    void pixelFormat(PixelFormat format);
};

#endif