private Renderable.ImageLayer CreateImageLayer(double north, double south, double west, double east, DrawArgs drawArgs, string imagePath)
{
Bitmap b = null;
Graphics g = null;
Renderable.ImageLayer imageLayer = null;
GeographicBoundingBox geoBB = new GeographicBoundingBox(north, south, west, east);
int numberPolygonsInTile = 0;
FileInfo imageFile = new FileInfo(imagePath);
if (!m_parentProjectedLayer.EnableCaching ||
!imageFile.Exists
)
{
if (m_parentProjectedLayer.LineStrings != null)
{
for (int i = 0; i < m_parentProjectedLayer.LineStrings.Length; i++)
{
if (!m_parentProjectedLayer.LineStrings[i].Visible)
{
continue;
}
GeographicBoundingBox currentBoundingBox = m_parentProjectedLayer.LineStrings[i].GetGeographicBoundingBox();
if (currentBoundingBox != null && !currentBoundingBox.Intersects(geoBB))
{
continue;
}
else
{
if (b == null)
{
b = new Bitmap(
m_parentProjectedLayer.TileSize.Width,
m_parentProjectedLayer.TileSize.Height,
System.Drawing.Imaging.PixelFormat.Format32bppArgb);
}
if (g == null)
{
g = Graphics.FromImage(b);
}
drawLineString(
m_parentProjectedLayer.LineStrings[i],
g,
geoBB,
b.Size
);
numberPolygonsInTile++;
}
}
}
if (m_parentProjectedLayer.Polygons != null)
{
for (int i = 0; i < m_parentProjectedLayer.Polygons.Length; i++)
{
if (!m_parentProjectedLayer.Polygons[i].Visible)
{
continue;
}
GeographicBoundingBox currentBoundingBox = m_parentProjectedLayer.Polygons[i].GetGeographicBoundingBox();
if (currentBoundingBox != null && !currentBoundingBox.Intersects(geoBB))
{
continue;
}
else
{
if (b == null)
{
b = new Bitmap(
m_parentProjectedLayer.TileSize.Width,
m_parentProjectedLayer.TileSize.Height,
System.Drawing.Imaging.PixelFormat.Format32bppArgb);
}
if (g == null)
{
g = Graphics.FromImage(b);
}
drawPolygon(
m_parentProjectedLayer.Polygons[i],
g,
geoBB,
b.Size);
numberPolygonsInTile++;
}
}
}
}
if (b != null)
{
System.Drawing.Imaging.BitmapData srcInfo = b.LockBits(new Rectangle(0, 0,
b.Width, b.Height),
System.Drawing.Imaging.ImageLockMode.ReadOnly,
System.Drawing.Imaging.PixelFormat.Format32bppArgb);
bool isBlank = true;
unsafe
{
int *srcPointer = (int *)srcInfo.Scan0;
for (int i = 0; i < b.Height; i++)
{
for (int j = 0; j < b.Width; j++)
{
int color = *srcPointer++;
if (((color >> 24) & 0xff) > 0)
{
isBlank = false;
break;
}
}
srcPointer += (srcInfo.Stride >> 2) - b.Width;
}
}
b.UnlockBits(srcInfo);
if (isBlank)
{
numberPolygonsInTile = 0;
}
}
// if(!m_parentProjectedLayer.EnableCaching)
// {
string id = System.DateTime.Now.Ticks.ToString();
if (b != null && numberPolygonsInTile > 0)
{
MemoryStream ms = new MemoryStream();
b.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
//must copy original stream into new stream, if not, error occurs, not sure why
m_ImageStream = new MemoryStream(ms.GetBuffer());
imageLayer = new MFW3D.Renderable.ImageLayer(
id,
m_parentProjectedLayer.World,
0,
m_ImageStream,
System.Drawing.Color.Black.ToArgb(),
(float)south,
(float)north,
(float)west,
(float)east,
1.0f //(float)m_parentProjectedLayer.Opacity / 255.0f
,
m_parentProjectedLayer.World.TerrainAccessor);
ms.Close();
}
/* }
* else if(imageFile.Exists || numberPolygonsInTile > 0)
* {
* string id = System.DateTime.Now.Ticks.ToString();
*
* if(b != null)
* {
* MemoryStream ms = new MemoryStream();
* b.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
* if(!imageFile.Directory.Exists)
* imageFile.Directory.Create();
*
* //must copy original stream into new stream, if not, error occurs, not sure why
* m_ImageStream = new MemoryStream(ms.GetBuffer());
* ImageHelper.ConvertToDxt3(m_ImageStream, imageFile.FullName);
*
* ms.Close();
* }
*
* imageLayer = new WorldWind.Renderable.ImageLayer(
* id,
* m_parentProjectedLayer.World,
* 0,
* imageFile.FullName,
* //System.Drawing.Color.Black.ToArgb(),
* (float)south,
* (float)north,
* (float)west,
* (float)east,
* 1.0f,//(float)m_parentProjectedLayer.Opacity / 255.0f,
* m_parentProjectedLayer.World.TerrainAccessor);
*
* imageLayer.TransparentColor = System.Drawing.Color.Black.ToArgb();
* }
*/
if (b != null)
{
b.Dispose();
}
if (g != null)
{
g.Dispose();
}
b = null;
g = null;
//might not be necessary
//GC.Collect();
return(imageLayer);
}
