vtf.hpp

#pragma once
 
#include "file-format-objects/header.hpp"
#include <cstdint>
#include <memory>
#include <span>
#include <vector>
 
namespace VtfParser {
  class Vtf {
  public:
    struct LowResImageExtent {
      uint8_t width;
      uint8_t height;
    };
 
    struct HighResImageExtent {
      uint16_t width;
      uint16_t height;
      uint16_t depth;
    };
 
    explicit Vtf(std::shared_ptr<std::vector<std::byte>> data);
 
    [[nodiscard]] ImageFormat getHighResImageFormat() const;
 
    [[nodiscard]] HighResImageExtent getHighResImageExtent(uint8_t mipLevel = 0) const;
 
    [[nodiscard]] uint8_t getFaces() const;
 
    [[nodiscard]] uint8_t getMipLevels() const;
 
    [[nodiscard]] uint16_t getFrames() const;
    [[nodiscard]] uint16_t getFirstFrame() const;
 
    [[nodiscard]] TextureFlags getFlags() const;
 
    [[nodiscard]] std::span<const std::byte> getHighResImageData() const;
 
    [[nodiscard]] size_t getImageSliceOffset(
      const uint8_t mipLevel = 0, const uint16_t frame = 0, const uint8_t face = 0, const uint16_t depth = 0
    ) const;
 
    [[nodiscard]] ImageFormat getLowResImageFormat() const;
 
    [[nodiscard]] LowResImageExtent getLowResImageExtent() const;
 
    [[nodiscard]] std::span<const std::byte> getLowResImageData() const;
 
  private:
    Header header;
 
    std::shared_ptr<std::vector<std::byte>> data;
    std::span<const std::byte> highResImageData;
    std::span<const std::byte> lowResImageData;
  };
}