4jcraft/targets/minecraft/client/renderer/texture/Stitcher.h

#pragma once

#include <format>
#include <set>
#include <string>
#include <vector>

#include "TextureHolder.h"

class StitchSlot;
class Texture;

class Stitcher {
public:
    static const int STITCH_SUCCESS = 0;
    static const int STITCH_RETRY = 1;
    static const int STITCH_ABORT = 2;

    static const int MAX_MIPLEVEL =
        0;  // This should be 4 again later when we *ACTUALLY* mipmap
    static const int MIN_TEXEL = 1 << MAX_MIPLEVEL;

private:
    std::set<TextureHolder*, TextureHolderLessThan>
        texturesToBeStitched;          // = new HashSet<TextureHolder>(256);
    std::vector<StitchSlot*> storage;  // = new ArrayList<StitchSlot>(256);
    int storageX;
    int storageY;

    int maxWidth;
    int maxHeight;
    bool forcePowerOfTwo;
    int forcedScale;

    Texture* stitchedTexture;

    std::string name;

    void _init(const std::string& name, int maxWidth, int maxHeight,
               bool forcePowerOfTwo, int forcedScale);

public:
    Stitcher(const std::string& name, int maxWidth, int maxHeight,
             bool forcePowerOfTwo);
    Stitcher(const std::string& name, int maxWidth, int maxHeight,
             bool forcePowerOfTwo, int forcedScale);

    int getWidth();
    int getHeight();
    void addTexture(TextureHolder* textureHolder);
    Texture* constructTexture(bool mipmap = true);  // 4J Added mipmap param
    void stitch();
    std::vector<StitchSlot*>* gatherAreas();

private:
    // Based on:
    // http://graphics.stanford.edu/~seander/bithacks.html#RoundUpPowerOf2
    int smallestEncompassingPowerOfTwo(int input);

    bool addToStorage(TextureHolder* textureHolder);

    /**
     * Expand the current storage to take in account the new texture.
     * This should only be called if it didn't fit anywhere.
     *
     * @param textureHolder
     * @return Boolean indicating if it could accommodate for the growth
     */
    bool expand(TextureHolder* textureHolder);
};