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Location: cpp/openttd-patchpack/source/src/bitmap_type.h - annotation
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* This file is part of OpenTTD.
* 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.
* 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.
* 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/>.
*/
/** @file bitmap_type.hpp Bitmap functions. */
#ifndef BITMAP_TYPE_HPP
#define BITMAP_TYPE_HPP
#include <vector>
/** Represents a tile area containing containing individually set tiles.
* Each tile must be contained within the preallocated area.
* A std::vector<bool> is used to mark which tiles are contained.
*/
class BitmapTileArea : public TileArea {
protected:
std::vector<bool> data;
inline uint Index(uint x, uint y) const { return y * this->w + x; }
inline uint Index(TileIndex tile) const { return Index(TileX(tile) - TileX(this->tile), TileY(tile) - TileY(this->tile)); }
public:
BitmapTileArea()
{
this->tile = INVALID_TILE;
this->w = 0;
this->h = 0;
}
BitmapTileArea(const TileArea &ta)
{
this->tile = ta.tile;
this->w = ta.w;
this->h = ta.h;
this->data.resize(Index(this->w, this->h));
}
/**
* Reset and clear the BitmapTileArea.
*/
void Reset()
{
this->tile = INVALID_TILE;
this->w = 0;
this->h = 0;
this->data.clear();
}
/**
* Initialize the BitmapTileArea with the specified Rect.
* @param rect Rect to use.
*/
void Initialize(const Rect &r)
{
this->tile = TileXY(r.left, r.top);
this->w = r.right - r.left + 1;
this->h = r.bottom - r.top + 1;
this->data.clear();
this->data.resize(Index(w, h));
}
void Initialize(const TileArea &ta)
{
this->tile = ta.tile;
this->w = ta.w;
this->h = ta.h;
this->data.clear();
this->data.resize(Index(w, h));
}
/**
* Add a tile as part of the tile area.
* @param tile Tile to add.
*/
inline void SetTile(TileIndex tile)
{
assert(this->Contains(tile));
this->data[Index(tile)] = true;
}
/**
* Clear a tile from the tile area.
* @param tile Tile to clear
*/
inline void ClrTile(TileIndex tile)
{
assert(this->Contains(tile));
this->data[Index(tile)] = false;
}
/**
* Test if a tile is part of the tile area.
* @param tile Tile to check
*/
inline bool HasTile(TileIndex tile) const
{
return this->Contains(tile) && this->data[Index(tile)];
}
};
/** Iterator to iterate over all tiles belonging to a bitmaptilearea. */
class BitmapTileIterator : public OrthogonalTileIterator {
protected:
const BitmapTileArea *bitmap;
public:
/**
* Construct the iterator.
* @param bitmap BitmapTileArea to iterate.
*/
BitmapTileIterator(const BitmapTileArea &bitmap) : OrthogonalTileIterator(bitmap), bitmap(&bitmap)
{
if (!this->bitmap->HasTile(TileIndex(this->tile))) ++(*this);
}
inline TileIterator& operator ++()
{
(*this).OrthogonalTileIterator::operator++();
while (this->tile != INVALID_TILE && !this->bitmap->HasTile(TileIndex(this->tile))) {
(*this).OrthogonalTileIterator::operator++();
}
return *this;
}
virtual TileIterator *Clone() const
{
return new BitmapTileIterator(*this);
}
};
#endif /* BITMAP_TYPE_HPP */
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