public static HeightField FromBitmap(Bitmap bitmap)
{
HeightField hField = new HeightField(bitmap.Width, bitmap.Height);
BitmapData data = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
unsafe
{
ARGB_32Bit *pixels = (ARGB_32Bit *)data.Scan0.ToPointer();
int dataIdx = 0;
for (int y = 0; y < bitmap.Height; y++)
{
for (int x = 0; x < bitmap.Width; x++)
{
hField.values[dataIdx++] = (pixels->R + pixels->G + pixels->B) / 765f;
pixels++;
}
}
}
bitmap.UnlockBits(data);
return(hField);
}
public Bitmap Rasterize()
{
if (buffer.AALayer != null)
{
buffer.ApplyAAFilter();
}
Bitmap bitmap = new Bitmap(buffer.Width, buffer.Height);
BitmapData data = bitmap.LockBits(viewArea, ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb);
unsafe
{
ARGB_32Bit *pixels = (ARGB_32Bit *)data.Scan0.ToPointer();
int dataIdx = 0;
for (int y = 0; y < buffer.Height; y++)
{
for (int x = 0; x < buffer.Width; x++)
{
float value = buffer.Data[dataIdx++];
pixels->B = (byte)((int)value >> 16);
pixels->G = (byte)((int)value >> 8);
pixels->R = (byte)((int)value & 0xFF);
pixels->A = (byte)((int)value >> 24);
// add bg if alpha < 255
if (pixels->A == 0)
{
pixels->B = buffer.Bg.B;
pixels->G = buffer.Bg.G;
pixels->R = buffer.Bg.R;
pixels->A = buffer.Bg.A;
}
else if (pixels->A != 255)
{
double alpha = (double)pixels->A / 255;
double ra = 1 - alpha;
pixels->B = (byte)((buffer.Bg.B * ra) + (pixels->B * alpha));
pixels->G = (byte)((buffer.Bg.G * ra) + (pixels->G * alpha));
pixels->R = (byte)((buffer.Bg.R * ra) + (pixels->R * alpha));
pixels->A = buffer.Bg.A; // maybe add alpha also
}
pixels++;
}
}
}
bitmap.UnlockBits(data);
Graphics g = Graphics.FromImage(bitmap);
g.DrawString(stats, new Font("Tahoma", 6), Brushes.White, 0, 0);
int size = buffer.Width / 4;
g.DrawImage(texture, buffer.Width - size, buffer.Height - size, size, size);
// put alpha back into text
//SizeF size = g.MeasureString(stats, new Font("Tahona", 6));
//data = bitmap.LockBits(new Rectangle(0, 0, (int)size.Width, (int)size.Height),
// ImageLockMode.ReadWrite, PixelFormat.Format32bppArgb);
//unsafe
//{
// for (int y = 0; y < size.Height; y++)
// {
// ARGB_32Bit* pixels = (ARGB_32Bit*)data.Scan0.ToPointer() + (y * viewArea.Width);
// for (int x = 0; x < size.Width; x++)
// {
// if (pixels->A == 0/* && (pixels->R != 0 || pixels->G != 0 || pixels->B != 0)*/)
// pixels->A = 255;
// pixels++;
// }
// }
//}
//bitmap.UnlockBits(data);
//bitmap.Save("c:/output-HM.png", ImageFormat.Png);
return(bitmap);
}
