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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#ifndef RECTANGLE_OPTIMIZER_H
#define RECTANGLE_OPTIMIZER_H
#include <list>
#include <bitset>
#include "System/Rectangle.h"
#include "System/creg/creg_cond.h"
/**
* @brief CRectangleOptimizer
*
* Container & preprocessor for rectangles. It solves any overlapping & merges+resizes rectangles.
*/
class CRectangleOptimizer
{
CR_DECLARE_STRUCT(CRectangleOptimizer)
public:
CRectangleOptimizer();
~CRectangleOptimizer();
void Optimize();
unsigned GetTotalArea() const;
public:
//! std container funcs
typedef std::list<SRectangle>::iterator iterator;
typedef std::list<SRectangle>::const_iterator const_iterator;
bool empty() const {
return rectangles.empty();
}
size_t size() const {
return rectangles.size();
}
SRectangle& front() {
return rectangles.front();
}
void pop_front() {
return rectangles.pop_front();
}
void swap(CRectangleOptimizer &other) {
rectangles.swap(other.rectangles);
std::swap(needsUpdate, other.needsUpdate);
other.maxAreaPerRect = maxAreaPerRect; // intentional one-way copy here
}
void splice(iterator pos, CRectangleOptimizer &other) {
needsUpdate = other.needsUpdate || !rectangles.empty();
rectangles.splice(pos, other.rectangles);
}
void clear() {
needsUpdate = false;
return rectangles.clear();
}
void push_back(const SRectangle& rect) {
//! skip empty/negative rectangles
//assert(rect.GetWidth() > 0 && rect.GetHeight() > 0);
if (rect.GetWidth() <= 0 || rect.GetHeight() <= 0)
return;
needsUpdate = true;
rectangles.push_back(rect);
}
void swap(std::list<SRectangle>& lst)
{
rectangles.swap(lst);
needsUpdate = !rectangles.empty();
}
iterator begin() {
return rectangles.begin();
}
iterator end() {
return rectangles.end();
}
public:
int maxAreaPerRect;
private:
void StageMerge();
void StageOverlap();
void StageSplitTooLarge();
bool HandleMerge(SRectangle& rect1, SRectangle& rect2);
int HandleOverlapping(SRectangle* rect1, SRectangle* rect2);
static std::bitset<4> GetEdgesInRect(const SRectangle& rect1, const SRectangle& rect2);
static std::bitset<4> GetSharedEdges(const SRectangle& rect1, const SRectangle& rect2);
static bool AreMergable(const SRectangle& rect1, const SRectangle& rect2);
private:
std::list<SRectangle> rectangles;
bool needsUpdate;
private:
static unsigned statsTotalSize;
static unsigned statsOptSize;
};
#endif // RECTANGLE_OPTIMIZER_H
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