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Editor/Util/ImagePainter.cpp

@@ -0,0 +1,155 @@
+////////////////////////////////////////////////////////////////////////////
+//
+//  Crytek Engine Source File.
+//  Copyright (C), Crytek Studios, 2002.
+// -------------------------------------------------------------------------
+//  File name:   imagepainter.cpp
+//  Version:     v1.00
+//  Created:     11/10/2002 by Timur.
+//  Compilers:   Visual Studio.NET
+//  Description: 
+// -------------------------------------------------------------------------
+//  History:
+//
+////////////////////////////////////////////////////////////////////////////
+
+#include "StdAfx.h"
+#include "ImagePainter.h"
+#include "Image.h"
+
+//////////////////////////////////////////////////////////////////////////
+CImagePainter::CImagePainter()
+{}
+
+//////////////////////////////////////////////////////////////////////////
+CImagePainter::~CImagePainter()
+{}
+
+//////////////////////////////////////////////////////////////////////////
+void CImagePainter::PaintBrush( TImage<unsigned char> &image,int px,int py,SPaintBrush &brush )
+{
+	if (brush.type == SMOOTH_BRUSH)
+	{
+		SmoothBrush( image,px,py,brush );
+		return;
+	}
+	////////////////////////////////////////////////////////////////////////
+	// Draw an attenuated spot on the map
+	////////////////////////////////////////////////////////////////////////
+	int i, j;
+	int iPosX, iPosY;
+	float fMaxDist, fAttenuation, fYSquared;
+	float fHardness = brush.hardness;
+
+	unsigned int pos;
+
+	unsigned char *src = image.GetData();
+
+	int value = brush.color;
+
+	// Calculate the maximum distance
+	fMaxDist = brush.radius;
+
+	int width = image.GetWidth();
+	int height = image.GetHeight();
+
+	for (j = -brush.radius; j < brush.radius; j++)
+	{
+		// Precalculate
+		iPosY = py + j;
+		fYSquared = (float)(j*j);
+
+		for (i = -brush.radius; i < brush.radius; i++)
+		{
+			// Calculate the position
+			iPosX = px + i;
+
+			// Skip invalid locations
+			if (iPosX < 0 || iPosY < 0 ||	iPosX > width - 1 || iPosY > height - 1)
+				continue;
+
+			// Only circle.
+			float dist = sqrtf(fYSquared + i*i);
+			if (dist > fMaxDist)
+				continue;
+
+			// Calculate the array index
+			pos = iPosX + iPosY * width;
+
+			// Calculate attenuation factor
+			fAttenuation = 1.0f - __min(1.0f, dist/fMaxDist);
+
+			int h = src[pos];
+			int dh = value - h;
+			float fh = (fAttenuation)*dh*fHardness + h;
+			
+			src[pos] = ftoi(fh);
+		}
+	}
+}
+
+//////////////////////////////////////////////////////////////////////////
+void CImagePainter::SmoothBrush( CByteImage &image,int px,int py,SPaintBrush &brush )
+{
+	////////////////////////////////////////////////////////////////////////
+	// Draw an attenuated spot on the map
+	////////////////////////////////////////////////////////////////////////
+	int i, j;
+	int iPosX, iPosY;
+	float fMaxDist, fYSquared;
+	float fHardness = brush.hardness;
+
+	unsigned int pos;
+
+	unsigned char *src = image.GetData();
+
+	int value = brush.color;
+
+	// Calculate the maximum distance
+	fMaxDist = brush.radius;
+
+	int width = image.GetWidth();
+	int height = image.GetHeight();
+	int maxsize = width*height;
+
+	for (j = -brush.radius; j < brush.radius; j++)
+	{
+		// Precalculate
+		iPosY = py + j;
+		fYSquared = (float)(j*j);
+
+		for (i = -brush.radius; i < brush.radius; i++)
+		{
+			// Calculate the position
+			iPosX = px + i;
+
+			// Skip invalid locations
+			if (iPosX < 1 || iPosY < 1 ||	iPosX > width - 2 || iPosY > height - 2)
+				continue;
+
+			// Only circle.
+			float dist = sqrtf(fYSquared + i*i);
+			if (dist > fMaxDist)
+				continue;
+
+			// Calculate the array index
+			pos = iPosX + iPosY * width;
+
+			// Calculate attenuation factor
+			float currH = src[pos];
+			float h =	
+				((uint)currH +
+					src[pos+1] +
+					src[pos-1] +
+					src[pos+width] +
+					src[pos-width] + 
+					src[pos+1+width] +
+					src[pos+1-width] +
+					src[pos-1+width] +
+					src[pos-1-width]
+				) / 9.0f;
+
+			src[pos] = FloatToIntRet(currH + (h-currH)*fHardness);
+		}
+	}
+}