SimpleEngine/DirectBitmap.cs at master · Skilles/SimpleEngine · GitHub

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usingSystem.Drawing.Imaging;
usingSystem.Runtime.InteropServices;

namespaceSimpleEngine;

/// <summary>
/// A custom bitmap implementation that uses direct memory access for very fast pixel calls.
/// </summary>
publicclassDirectBitmap:IDisposable

{
publicDirectBitmap(intwidth,intheight)
{
Width=width;
Height=height;
Bits=newint[width*height];
BitsHandle=GCHandle.Alloc(Bits,GCHandleType.Pinned);
Bitmap=newBitmap(width,height,width*4,PixelFormat.Format32bppPArgb,BitsHandle.AddrOfPinnedObject());
}

privateDirectBitmap(DirectBitmaporiginal)
{
Width=original.Width;
Height=original.Height;
Bits=(int[])original.Bits.Clone();
BitsHandle=GCHandle.Alloc(Bits,GCHandleType.Pinned);
Bitmap=newBitmap(Width,Height,Width*4,PixelFormat.Format32bppPArgb,BitsHandle.AddrOfPinnedObject());
}

publicBitmapBitmap{get;}
publicint[]Bits{get;}
publicboolDisposed{get;privateset;}
publicintHeight{get;}
publicintWidth{get;}

protectedGCHandleBitsHandle{get;}

publicvoidDispose()
{
if(Disposed)return;
Disposed=true;
Bitmap.Dispose();
BitsHandle.Free();
}

~DirectBitmap()
{
Dispose();
}

publicvoidSetPixel(intx,inty,Colorcolor)
{
varindex=x+y*Width;
varcol=color.ToArgb();

Bits[index]=col;
}

publicColorGetPixel(intx,inty)
{
varindex=x+y*Width;
varcol=Bits[index];
varresult=Color.FromArgb(col);

returnresult;
}

int[,]To2DArray()
{
int[,]result=newint[Width,Height];
// Convert the 1D pixel array into 2D
for(inty=0;y<Height;y++)
{
intpY=y*Width;
for(intx=0;x<Width;x++)
{
result[x,y]=Bits[x+pY];
}
}
returnresult;
}

publicDirectBitmapClone()
{
returnnewDirectBitmap(this);
}

publicBitmapToGrayscale()
{
varresult=newBitmap(this.Width,this.Height,PixelFormat.Format8bppIndexed);

BitmapDatadata=result.LockBits(newRectangle(0,0,result.Width,result.Height),ImageLockMode.WriteOnly,PixelFormat.Format8bppIndexed);

// Copy the bytes from the image into a byte array
byte[]bytes=newbyte[data.Height*data.Stride];
Marshal.Copy(data.Scan0,bytes,0,bytes.Length);

for(inty=0;y<this.Height;y++)
{
for(intx=0;x<this.Width;x++)
{
varc=this.GetPixel(x,y);
varrgb=(byte)((c.B+c.G+c.R)/3);

bytes[y*data.Stride+x]=rgb;
}
}

// Copy the bytes from the byte array into the image
Marshal.Copy(bytes,0,data.Scan0,bytes.Length);

result.UnlockBits(data);

returnresult;
}

publicBitmapToTensorFormat()
{
varresult=newBitmap(this.Width,this.Height,PixelFormat.Format8bppIndexed);

BitmapDatadata=result.LockBits(newRectangle(0,0,result.Width,result.Height),ImageLockMode.WriteOnly,PixelFormat.Format8bppIndexed);

// Copy the bytes from the image into a byte array
byte[]bytes=newbyte[data.Height*data.Stride];
Marshal.Copy(data.Scan0,bytes,0,bytes.Length);

for(inty=0;y<this.Height;y++)
{
for(intx=0;x<this.Width;x++)
{
varc=this.GetPixel(x,y);
if(c.Name.Equals("ffffffff")){
c=Color.Black;
}else
{
c=Color.White;
}
varrgb=(byte)((c.B+c.G+c.R)/3);

bytes[y*data.Stride+x]=rgb;
}
}

// Copy the bytes from the byte array into the image
Marshal.Copy(bytes,0,data.Scan0,bytes.Length);

result.UnlockBits(data);

returnresult;
}
}