1 files changed, 96 insertions, 0 deletions
diff --git a/src/gui/game/BitmapBrush.h b/src/gui/game/BitmapBrush.h
new file mode 100644
index 0000000..e1c0445
--- /dev/null
+++ b/src/gui/game/BitmapBrush.h
@@ -0,0 +1,96 @@
+/*
+ * BitmapBrush.h
+ *
+ *  Created on: Nov 18, 2012
+ *      Author: Simon Robertshaw
+ */
+
+#ifndef BTIMAPBRUSH_H_
+#define BTIMAPBRUSH_H_
+
+#include <vector>
+#include <cmath>
+#include "Brush.h"
+
+class BitmapBrush: public Brush
+{
+protected:
+	ui::Point origSize;
+	unsigned char * origBitmap;
+public:
+	BitmapBrush(std::vector<unsigned char> newBitmap, ui::Point rectSize_):
+		Brush(ui::Point(0, 0)),
+		origSize(0, 0)
+	{
+		ui::Point newSize = rectSize_;
+
+		//Ensure the rect has odd dimentions so we can pull an integer radius with a 1x1 centre 
+		if(!(newSize.X % 2))
+			newSize.X += 1;
+		if(!(newSize.Y % 2))
+			newSize.Y += 1;
+
+		radius = (newSize-ui::Point(1, 1))/2;
+		size = newSize;
+		origSize = size;
+
+		origBitmap = new unsigned char[size.X*size.Y];
+		std::fill(origBitmap, origBitmap+(size.X*size.Y), 0);
+		for(int y = 0; y < rectSize_.Y; y++)
+		{
+			for(int x = 0; x < rectSize_.X; x++)
+			{
+				if(newBitmap[(y*rectSize_.X)+x] >= 128)
+					origBitmap[(y*size.X)+x] = newBitmap[(y*rectSize_.X)+x];
+			}	
+		}
+
+		SetRadius(radius);
+	};
+	virtual void GenerateBitmap()
+	{
+		if(origBitmap)
+		{
+			if(bitmap)
+				delete[] bitmap;
+			bitmap = new unsigned char[size.X*size.Y];
+			if(size == origSize)
+				std::copy(origBitmap, origBitmap+(origSize.X*origSize.Y), bitmap);
+			else
+			{
+				//Bilinear interpolation
+				float factorX = ((float)origSize.X)/((float)size.X);
+				float factorY = ((float)origSize.Y)/((float)size.Y);
+				for(int y = 0; y < size.Y; y++)
+				{
+					for(int x = 0; x < size.X; x++)
+					{
+						float originalY = ((float)y)*factorY;
+						float originalX = ((float)x)*factorX;
+
+						int lowerX = std::floor(originalX);
+						int upperX = std::min((float)(origSize.X-1), std::floor(originalX+1.0f));
+						int lowerY = std::floor(originalY);
+						int upperY = std::min((float)(origSize.Y-1), std::floor(originalY+1.0f));
+
+						unsigned char topRight = origBitmap[(lowerY*origSize.X)+upperX];
+						unsigned char topLeft = origBitmap[(lowerY*origSize.X)+lowerX];
+						unsigned char bottomRight = origBitmap[(upperY*origSize.X)+upperX];
+						unsigned char bottomLeft = origBitmap[(upperY*origSize.X)+lowerX];
+						float top = LinearInterpolate<float>(topLeft, topRight, lowerX, upperX, originalX);
+						float bottom = LinearInterpolate<float>(bottomLeft, bottomRight, lowerX, upperX, originalX);
+						float mid = LinearInterpolate<float>(top, bottom, lowerY, upperY, originalY);
+						bitmap[(y*size.X)+x] = mid > 128 ? 255 : 0;
+					}
+				}
+			}
+		}
+	}
+	virtual ~BitmapBrush()
+	{
+		if(origBitmap)
+			delete[] origBitmap;
+	}
+};
+
+#endif /* BTIMAPBRUSH_H_ */