palladium/include/pd/graphics/texture.hpp

#pragma once

/*
MIT License

Copyright (c) 2024 tobid7

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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The above copyright notice and this permission notice shall be included in all
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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SOFTWARE.
 */

#include <citro3d.h>

#include <pd/common/common.hpp>
#include <pd/graphics/rect.hpp>
#include <pd/maths/vec.hpp>

namespace PD {
class Texture : public SmartCtor<Texture> {
 public:
  enum Type {
    RGBA32,
    RGB24,
    A8,
  };

  enum Filter {
    NEAREST,
    LINEAR,
  };
  /// @brief Default constructor
  Texture() : uv(0.f, 1.f, 1.f, 0.f) {}
  /// @brief Load file Constructor
  /// @param path path to file
  Texture(const std::string& path, bool t3x = false) : uv(0.f, 1.f, 1.f, 0.f) {
    if (t3x) {
      this->LoadT3X(path);
    } else {
      this->LoadFile(path);
    }
  }
  /// @brief Load Memory constructor
  /// @param data File Data reference
  Texture(const std::vector<u8>& data) : uv(0.f, 1.f, 1.f, 0.f) {
    this->LoadMemory(data);
  }
  /// @brief Load Pixels constructor
  /// @param data Pixel Buffer reference
  /// @param w width
  /// @param h height
  /// @param type Buffer Type
  /// @param filter Filter
  Texture(const std::vector<u8>& data, int w, int h, Type type = RGBA32,
          Filter filter = NEAREST)
      : uv(0.f, 1.f, 1.f, 0.f) {
    this->LoadPixels(data, w, h, type, filter);
  }
  /// @brief Deconstructor (aka auto delete)
  ~Texture() {
    if (autounload) {
      Delete();
    }
  }

  /// @brief Deletes image (if not already unloaded)
  void Delete();

  /// @brief Load a png/jpg/bmp from fs into a gpu tex
  /// @param path path to image file
  void LoadFile(const std::string& path);
  /// @brief Load a png/jpg/bmp from memory
  /// @param data reference to data buffer of the file
  void LoadMemory(const std::vector<u8>& data);
  /// @brief Create Texture out of Pixel Data
  /// @param data Data reference
  /// @param w width
  /// @param h heigt
  /// @param type Type of the databuffer
  /// @param filter Filter (NEAREST OR LINEAR)
  void LoadPixels(const std::vector<u8>& data, int w, int h, Type type = RGBA32,
                  Filter filter = NEAREST);

  /// @brief Load a texture of a T3X File
  /// @note This is used for single texture T3X
  /// Not for SpriteSheets
  /// @param path path to .t3x file
  void LoadT3X(const std::string& path);

  /// @brief Input a Texture that you had set up on your own
  /// @param tex Texture reference (deletes itself)
  /// @param rszs The size of the source image
  /// @param uvs Your uv Setup
  void LoadExternal(C3D_Tex* tex, vec2 rszs, LI::Rect uvs) {
    this->Delete();
    this->tex = tex;
    this->size = rszs;
    this->uv = uvs;
  }

  vec2 GetRealSize() {
    if (!tex) {
      return vec2();
    }
    return vec2(tex->width, tex->height);
  }
  vec2 GetSize() const { return size; }
  C3D_Tex* GetTex() const { return tex; };
  LI::Rect GetUV() const { return uv; }
  bool IsValid() const { return tex != 0; }

  bool AutoUnLoad() const { return autounload; }
  void AutoUnLoad(bool v) { autounload = v; }

  operator C3D_Tex*() const { return tex; }
  operator vec2() const { return size; }
  operator LI::Rect() const { return uv; }
  operator bool() const { return tex != 0; }

 private:
  void MakeTex(std::vector<u8>& buf, int w, int h, Type type = RGBA32,
               Filter filter = NEAREST);
  vec2 size;
  LI::Rect uv;
  C3D_Tex* tex = nullptr;
  bool autounload = true;
};
}  // namespace PD