Keep track of allocated sprite count

include/sprite.hpp

@@ -16,7 +16,7 @@ private:
 	bool _visibility;
 	u16 *_gfx;
 
-	static bool _assigned[2][128];
+	static u8 _assigned[2][128];
 
 public:
 	/**
@@ -43,6 +43,8 @@ public:
 	 */
 	Sprite(bool top, SpriteSize size, SpriteColorFormat format, int x = 0, int y = 0, int priority = 0, int id = -1, int paletteAlpha = 15, int rotationIndex = -1, bool doubleSize = false, bool visible = true, bool vFlip = false, bool hFlip = false, bool mosaic = false);
 
+	Sprite(const Sprite &sprite);
+
 	~Sprite(void);
 
 	u16* gfx(void) const { return _gfx; }

source/sprite.cpp

@@ -28,7 +28,7 @@
 
 #include "tonccpy.h"
 
-bool Sprite::_assigned[2][128] = {{false}, {false}};
+u8 Sprite::_assigned[2][128] = {{false}, {false}};
 
 Sprite::Sprite(bool top, SpriteSize size, SpriteColorFormat format, int x, int y, int priority, int id,
 			   int paletteAlpha, int rotationIndex, bool doubleSize, bool visible, bool vFlip, bool hFlip, bool mosaic)
@@ -44,7 +44,7 @@ Sprite::Sprite(bool top, SpriteSize size, SpriteColorFormat format, int x, int y
 		}
 	}
 
-	_assigned[top][_id] = true;
+	_assigned[top][_id]++;
 
 	// Get the sprite width and height from the SpriteSize
 	if(((_size >> 12) & 3) == OBJSHAPE_SQUARE) {
@@ -98,9 +98,18 @@ Sprite::Sprite(bool top, SpriteSize size, SpriteColorFormat format, int x, int y
 		   vFlip, hFlip, mosaic);
 }
 
+Sprite::Sprite(const Sprite &sprite) : _top(sprite._top), _oam(sprite._oam), _size(sprite._size), _format(sprite._format), _x(sprite._x), _y(sprite._y), _priority(sprite._priority),
+	  _id(sprite._id), _rotationIndex(sprite._rotationIndex), _paletteAlpha(sprite._paletteAlpha), _visibility(sprite._visibility) {
+	_assigned[_top][_id]++;
+}
+
 Sprite::~Sprite(void) {
-	oamFreeGfx(_oam, _gfx);
-	_assigned[_top][_id] = false;
+	_assigned[_top][_id]--;
+	if(!_assigned[_top][_id]) {
+		oamFreeGfx(_oam, _gfx);
+		oamClearSprite(_oam, _id);
+		oamUpdate(_oam);
+	}
 }
 
 void Sprite::rotation(int rotation) {