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/*
* Copyright (c) Contributors
* See CONTRIBUTORS.TXT for a full list of copyright holders.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the OpenSimulator Project nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// to build without references to System.Drawing, comment this out
#define SYSTEM_DRAWING
using System;
using System.Collections.Generic;
using System.Text;
#if SYSTEM_DRAWING
using System.Drawing;
using System.Drawing.Imaging;
namespace PrimMesher
{
public class SculptMap
{
public int width;
public int height;
public byte[] redBytes;
public byte[] greenBytes;
public byte[] blueBytes;
public SculptMap()
{
}
public SculptMap(Bitmap bm, int lod)
{
int bmW = bm.Width;
int bmH = bm.Height;
if (bmW == 0 || bmH == 0)
throw new Exception("SculptMap: bitmap has no data");
int numLodPixels = lod * lod; // (32 * 2)^2 = 64^2 pixels for default sculpt map image
bool smallMap = bmW * bmH <= numLodPixels;
bool needsScaling = false;
width = bmW;
height = bmH;
while (width * height > numLodPixels * 4)
{
width >>= 1;
height >>= 1;
needsScaling = true;
}
try
{
if (needsScaling)
bm = ScaleImage(bm, width, height);
}
catch (Exception e)
{
throw new Exception("Exception in ScaleImage(): e: " + e.ToString());
}
if (width * height > numLodPixels)
{
width >>= 1;
height >>= 1;
}
int numBytes = (width + 1) * (height + 1);
redBytes = new byte[numBytes];
greenBytes = new byte[numBytes];
blueBytes = new byte[numBytes];
int byteNdx = 0;
try
{
for (int y = 0; y <= height; y++)
{
for (int x = 0; x <= width; x++)
{
Color c;
if (smallMap)
c = bm.GetPixel(x < width ? x : x - 1,
y < height ? y : y - 1);
else
c = bm.GetPixel(x < width ? x * 2 : x * 2 - 1,
y < height ? y * 2 : y * 2 - 1);
redBytes[byteNdx] = c.R;
greenBytes[byteNdx] = c.G;
blueBytes[byteNdx] = c.B;
++byteNdx;
}
}
}
catch (Exception e)
{
throw new Exception("Caught exception processing byte arrays in SculptMap(): e: " + e.ToString());
}
width++;
height++;
}
public List<List<Coord>> ToRows(bool mirror)
{
int numRows = height;
int numCols = width;
List<List<Coord>> rows = new List<List<Coord>>(numRows);
float pixScale = 1.0f / 255;
int rowNdx, colNdx;
int smNdx = 0;
for (rowNdx = 0; rowNdx < numRows; rowNdx++)
{
List<Coord> row = new List<Coord>(numCols);
for (colNdx = 0; colNdx < numCols; colNdx++)
{
if (mirror)
row.Add(new Coord(-((float)redBytes[smNdx] * pixScale - 0.5f), ((float)greenBytes[smNdx] * pixScale - 0.5f), (float)blueBytes[smNdx] * pixScale - 0.5f));
else
row.Add(new Coord((float)redBytes[smNdx] * pixScale - 0.5f, (float)greenBytes[smNdx] * pixScale - 0.5f, (float)blueBytes[smNdx] * pixScale - 0.5f));
++smNdx;
}
rows.Add(row);
}
return rows;
}
private Bitmap ScaleImage(Bitmap srcImage, int destWidth, int destHeight)
{
Bitmap scaledImage = new Bitmap(destWidth, destHeight, PixelFormat.Format24bppRgb);
Color c;
float xscale = srcImage.Width / destWidth;
float yscale = srcImage.Height / destHeight;
float sy = 0.5f;
for (int y = 0; y < destHeight; y++)
{
float sx = 0.5f;
for (int x = 0; x < destWidth; x++)
{
try
{
c = srcImage.GetPixel((int)(sx), (int)(sy));
scaledImage.SetPixel(x, y, Color.FromArgb(c.R, c.G, c.B));
}
catch (IndexOutOfRangeException)
{
}
sx += xscale;
}
sy += yscale;
}
srcImage.Dispose();
return scaledImage;
}
}
}
#endif
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