Brush.h

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#pragma once
 
#include "editor/TileBuffer.h"
 
#include <string>
#include <vector>
 
namespace eve::editor {
 
class Brush {
public:
    Brush();
 
    void setTool(const std::string &tool);
    std::string getTool() const { return tool_; }
 
    void setSize(int size);
    int getSize() const { return size_; }
 
    void setShape(const std::string &shape);
    std::string getShape() const { return shape_; }
 
    void setTile(int gid);
    int getTile() const { return tile_; }
 
    void setEraseTile(int gid);
    int getEraseTile() const { return eraseTile_; }
 
    void setStampSize(int width, int height);
    int getStampWidth() const { return stampW_; }
    int getStampHeight() const { return stampH_; }
    void setStampTile(int lx, int ly, int gid);
    int getStampTile(int lx, int ly) const;
    void clearStamp();
 
    int paintAt(TileBuffer *buffer, int tx, int ty);
    int eraseAt(TileBuffer *buffer, int tx, int ty);
    int floodFill(TileBuffer *buffer, int tx, int ty);
    int paintLine(TileBuffer *buffer, int x0, int y0, int x1, int y1);
    int paintRect(TileBuffer *buffer, int x0, int y0, int x1, int y1, bool filled);
 
    int previewAt(TileBuffer *buffer, int tx, int ty);
    int previewLine(TileBuffer *buffer, int x0, int y0, int x1, int y1);
    int previewRect(TileBuffer *buffer, int x0, int y0, int x1, int y1, bool filled);
 
    int getPreviewCount() const { return static_cast<int>(preview_.size()); }
    int getPreviewX(int index) const;
    int getPreviewY(int index) const;
    int getPreviewGid(int index) const;
 
    int getChangeCount() const { return static_cast<int>(changes_.size()); }
    int getChangeX(int index) const;
    int getChangeY(int index) const;
    int getChangeOldGid(int index) const;
    int getChangeNewGid(int index) const;
 
private:
    struct Cell {
        int x = 0;
        int y = 0;
        int gid = 0;
        int oldGid = 0;
    };
 
    void clearChanges();
    void clearPreview();
    void collectBrushCells(int tx, int ty, std::vector<std::pair<int, int>> &out) const;
    void collectLineCells(int x0, int y0, int x1, int y1, std::vector<std::pair<int, int>> &out) const;
    void collectRectCells(int x0, int y0, int x1, int y1, bool filled,
                          std::vector<std::pair<int, int>> &out) const;
    int applyCells(TileBuffer *buffer, const std::vector<std::pair<int, int>> &cells, int gid);
    int applyStamp(TileBuffer *buffer, int tx, int ty);
    int previewCells(TileBuffer *buffer, const std::vector<std::pair<int, int>> &cells, int gid);
    bool validChange(int index) const;
    bool validPreview(int index) const;
 
    std::string tool_ = "paint";
    std::string shape_ = "square";
    int size_ = 1;
    int tile_ = 1;
    int eraseTile_ = 0;
    int stampW_ = 0;
    int stampH_ = 0;
    std::vector<int> stamp_;
 
    std::vector<Cell> changes_;
    std::vector<Cell> preview_;
};
 
}  // namespace eve::editor