public MemoryImage(MemoryImage SourceImage)
{
Create(SourceImage.Width, SourceImage.Height, SourceImage.PixelFormat);
for (int i = 0; i < PaletteEntryCount; ++i)
{
SetPaletteColor(i, SourceImage.PaletteRed(i), SourceImage.PaletteGreen(i), SourceImage.PaletteBlue(i));
}
}
public IImage GetImage(int X, int Y, int ImageWidth, int ImageHeight)
{
GR.Image.MemoryImage subImage = new MemoryImage(ImageWidth, ImageHeight, m_PixelFormat);
for (int i = 0; i < PaletteEntryCount; ++i)
{
subImage.SetPaletteColor(i, PaletteRed(i), PaletteGreen(i), PaletteBlue(i));
}
// clip
if ((X >= Width) ||
(Y >= Height) ||
(X + ImageWidth < 0) ||
(Y + ImageHeight < 0))
{
return(subImage);
}
int copyWidth = subImage.Width;
int copyHeight = subImage.Height;
if (X < 0)
{
copyWidth += X;
X = 0;
}
if (X + copyWidth >= Width)
{
copyWidth = Width - X;
}
if (Y < 0)
{
copyHeight += Y;
Y = 0;
}
if (Y + copyHeight >= Height)
{
copyHeight = Height - Y;
}
if ((subImage.PixelFormat == PixelFormat) &&
(BitsPerPixel >= 8))
{
unsafe
{
byte *pTargetPos = (byte *)subImage.PinData();
byte *pSourcePos = (byte *)PinData();
pSourcePos += BytesPerLine * Y + X * BitsPerPixel / 8;
for (int y = 0; y < copyHeight; ++y)
{
CopyMemory(new IntPtr(pTargetPos), new IntPtr(pSourcePos), (uint)(copyWidth * BitsPerPixel / 8));
/*
* GR.Memory.ByteBuffer lineData = new GR.Memory.ByteBuffer();
* for ( int i = 0; i < copyWidth * BitsPerPixel / 8; ++i )
* {
* lineData.AppendU8( pSourcePos[i] );
* }
* Debug.Log( lineData.ToString() );
* */
pTargetPos += subImage.BytesPerLine;
pSourcePos += BytesPerLine;
}
UnpinData();
subImage.UnpinData();
}
}
else
{
// safe (but slow) copy
for (int i = 0; i < copyWidth; ++i)
{
for (int j = 0; j < copyHeight; ++j)
{
subImage.SetPixel(X + i, Y + j, GetPixel(i, j));
}
}
}
return(subImage);
}
