mirror of https://github.com/OpenTTD/OpenTTD.git
135 lines
3.3 KiB
C++
135 lines
3.3 KiB
C++
/*
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* This file is part of OpenTTD.
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* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
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* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file bitmap_type.hpp Bitmap functions. */
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#ifndef BITMAP_TYPE_HPP
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#define BITMAP_TYPE_HPP
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/** Represents a tile area containing containing individually set tiles.
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* Each tile must be contained within the preallocated area.
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* A std::vector<bool> is used to mark which tiles are contained.
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*/
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class BitmapTileArea : public TileArea {
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protected:
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std::vector<bool> data;
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inline uint Index(uint x, uint y) const { return y * this->w + x; }
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inline uint Index(TileIndex tile) const { return Index(TileX(tile) - TileX(this->tile), TileY(tile) - TileY(this->tile)); }
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public:
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BitmapTileArea()
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{
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this->tile = INVALID_TILE;
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this->w = 0;
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this->h = 0;
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}
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BitmapTileArea(const TileArea &ta)
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{
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this->tile = ta.tile;
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this->w = ta.w;
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this->h = ta.h;
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this->data.resize(Index(this->w, this->h));
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}
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/**
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* Reset and clear the BitmapTileArea.
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*/
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void Reset()
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{
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this->tile = INVALID_TILE;
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this->w = 0;
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this->h = 0;
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this->data.clear();
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}
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/**
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* Initialize the BitmapTileArea with the specified Rect.
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* @param rect Rect to use.
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*/
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void Initialize(const Rect &r)
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{
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this->tile = TileXY(r.left, r.top);
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this->w = r.Width();
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this->h = r.Height();
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this->data.clear();
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this->data.resize(Index(w, h));
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}
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void Initialize(const TileArea &ta)
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{
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this->tile = ta.tile;
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this->w = ta.w;
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this->h = ta.h;
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this->data.clear();
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this->data.resize(Index(w, h));
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}
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/**
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* Add a tile as part of the tile area.
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* @param tile Tile to add.
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*/
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inline void SetTile(TileIndex tile)
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{
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assert(this->Contains(tile));
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this->data[Index(tile)] = true;
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}
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/**
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* Clear a tile from the tile area.
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* @param tile Tile to clear
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*/
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inline void ClrTile(TileIndex tile)
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{
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assert(this->Contains(tile));
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this->data[Index(tile)] = false;
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}
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/**
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* Test if a tile is part of the tile area.
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* @param tile Tile to check
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*/
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inline bool HasTile(TileIndex tile) const
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{
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return this->Contains(tile) && this->data[Index(tile)];
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}
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};
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/** Iterator to iterate over all tiles belonging to a bitmaptilearea. */
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class BitmapTileIterator : public OrthogonalTileIterator {
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protected:
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const BitmapTileArea *bitmap;
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public:
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/**
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* Construct the iterator.
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* @param bitmap BitmapTileArea to iterate.
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*/
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BitmapTileIterator(const BitmapTileArea &bitmap) : OrthogonalTileIterator(bitmap), bitmap(&bitmap)
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{
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if (!this->bitmap->HasTile(TileIndex(this->tile))) ++(*this);
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}
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inline TileIterator& operator ++() override
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{
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(*this).OrthogonalTileIterator::operator++();
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while (this->tile != INVALID_TILE && !this->bitmap->HasTile(TileIndex(this->tile))) {
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(*this).OrthogonalTileIterator::operator++();
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}
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return *this;
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}
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std::unique_ptr<TileIterator> Clone() const override
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{
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return std::make_unique<BitmapTileIterator>(*this);
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}
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};
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#endif /* BITMAP_TYPE_HPP */
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