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* Added some comments to terrain module. 

* Fixed a range issue in the GenericSystemDrawing saving mechanism.
0.6.0-stable
Adam Frisby 2008-04-13 01:36:03 +00:00
parent e46454afa6
commit 17507404b5
2 changed files with 57 additions and 3 deletions
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15
OpenSim/Region/Environment/Modules/Terrain/FileLoaders/BMP.cs
View File

@ -30,8 +30,19 @@ using OpenSim.Region.Environment.Interfaces;
namespace OpenSim.Region.Environment.Modules.Terrain.FileLoaders
{
/// <summary>
/// A generic windows bitmap loader.
/// Should be capable of handling 24-bit RGB images.
///
/// Uses the System.Drawing filesystem loader.
/// </summary>
class BMP : GenericSystemDrawing
{
/// <summary>
/// Exports a file to a image on the disk using a System.Drawing exporter.
/// </summary>
/// <param name="filename">The target filename</param>
/// <param name="map">The terrain channel being saved</param>
public override void SaveFile(string filename, ITerrainChannel map)
{
Bitmap colours = CreateGrayscaleBitmapFromMap(map);
@ -39,6 +50,10 @@ namespace OpenSim.Region.Environment.Modules.Terrain.FileLoaders
colours.Save(filename, System.Drawing.Imaging.ImageFormat.Bmp);
}
/// <summary>
/// The human readable version of the file format(s) this loader handles
/// </summary>
/// <returns></returns>
public override string ToString()
{
return "BMP";

45
OpenSim/Region/Environment/Modules/Terrain/FileLoaders/GenericSystemDrawing.cs
View File

@ -31,10 +31,24 @@ using OpenSim.Region.Environment.Interfaces;
namespace OpenSim.Region.Environment.Modules.Terrain.FileLoaders
{
/// <summary>
/// A virtual class designed to have methods overloaded,
/// this class provides an interface for a generic image
/// saving and loading mechanism, but does not specify the
/// format. It should not be insubstantiated directly.
/// </summary>
public class GenericSystemDrawing : ITerrainLoader
{
#region ITerrainLoader Members
/// <summary>
/// Loads a file from a specified filename on the disk,
/// parses the image using the System.Drawing parsers
/// then returns a terrain channel. Values are
/// returned based on HSL brightness between 0m and 128m
/// </summary>
/// <param name="filename">The target image to load</param>
/// <returns>A terrain channel generated from the image.</returns>
public virtual ITerrainChannel LoadFile(string filename)
{
Bitmap file = new Bitmap(filename);
@ -63,6 +77,12 @@ namespace OpenSim.Region.Environment.Modules.Terrain.FileLoaders
return "SYS.DRAWING";
}
/// <summary>
/// Protected method, generates a grayscale bitmap
/// image from a specified terrain channel.
/// </summary>
/// <param name="map">The terrain channel to export to bitmap</param>
/// <returns>A System.Drawing.Bitmap containing a grayscale image</returns>
protected Bitmap CreateGrayscaleBitmapFromMap(ITerrainChannel map)
{
Bitmap bmp = new Bitmap(map.Width, map.Height);
@ -82,13 +102,22 @@ namespace OpenSim.Region.Environment.Modules.Terrain.FileLoaders
// 512 is the largest possible height before colours clamp
int colorindex = (int)(Math.Max(Math.Min(1.0, map[x, y] / 128.0), 0.0) * (pallete - 1));
bmp.SetPixel(x, map.Height - y - 1, grays[colorindex]);
// Handle error conditions
if (colorindex > pallete - 1 || colorindex < 0)
bmp.SetPixel(x, map.Height - y - 1, Color.Red);
else
bmp.SetPixel(x, map.Height - y - 1, grays[colorindex]);
}
}
return bmp;
}
/// <summary>
/// Protected method, generates a coloured bitmap
/// image from a specified terrain channel.
/// </summary>
/// <param name="map">The terrain channel to export to bitmap</param>
/// <returns>A System.Drawing.Bitmap containing a coloured image</returns>
protected Bitmap CreateBitmapFromMap(ITerrainChannel map)
{
Bitmap gradientmapLd = new Bitmap("defaultstripe.png");
@ -109,12 +138,22 @@ namespace OpenSim.Region.Environment.Modules.Terrain.FileLoaders
{
// 512 is the largest possible height before colours clamp
int colorindex = (int)(Math.Max(Math.Min(1.0, map[x, y] / 512.0), 0.0) * (pallete - 1));
bmp.SetPixel(x, map.Height - y - 1, colours[colorindex]);
// Handle error conditions
if (colorindex > pallete - 1 || colorindex < 0)
bmp.SetPixel(x, map.Height - y - 1, Color.Red);
else
bmp.SetPixel(x, map.Height - y - 1, colours[colorindex]);
}
}
return bmp;
}
/// <summary>
/// Exports a file to a image on the disk using a System.Drawing exporter.
/// </summary>
/// <param name="filename">The target filename</param>
/// <param name="map">The terrain channel being saved</param>
public virtual void SaveFile(string filename, ITerrainChannel map)
{
Bitmap colours = CreateGrayscaleBitmapFromMap(map);