public override PixelBuffer ReadPixels(PixelFormat format, Rectangle rect)
{
Direct3D.Surface surf = mTexture.Value.GetSurfaceLevel(0);
rect.X += mSrcRect.X;
rect.Y += mSrcRect.Y;
int stride;
int pixelPitch = mDisplay.GetPixelPitch(surf.Description.Format);
PixelFormat pixelFormat = mDisplay.GetPixelFormat(surf.Description.Format);
if (format == PixelFormat.Any)
{
format = pixelFormat;
}
GraphicsStream stm = surf.LockRectangle(
new Drawing.Rectangle(0, 0, mTextureSize.Width, mTextureSize.Height),
LockFlags.ReadOnly, out stride);
byte[] array = new byte[SurfaceWidth * SurfaceHeight * pixelPitch];
int length = SurfaceWidth * pixelPitch;
int index = 0;
unsafe
{
byte *ptr = (byte *)stm.InternalDataPointer;
for (int i = rect.Top; i < rect.Bottom; i++)
{
// hack if the size requested is too large.
if (i >= mTextureSize.Height)
{
break;
}
//IntPtr ptr = (IntPtr)((int)stm.InternalData + i * stride + rect.Left * pixelPitch);
IntPtr mptr = (IntPtr)(ptr + i * stride + rect.Left * pixelPitch);
Marshal.Copy(mptr, array, index, length);
index += length;
}
}
surf.UnlockRectangle();
surf.Dispose();
return(new PixelBuffer(format, rect.Size, array, pixelFormat));
}
public override bool IsColumnBlank(int col)
{
Direct3D.Surface surf = mTexture.Value.GetSurfaceLevel(0);
int stride;
GraphicsStream stm = surf.LockRectangle(Interop.Convert(mSrcRect),
LockFlags.ReadOnly, out stride);
bool retval = this.IsColBlankScanARGB(stm.InternalData, col, this.SurfaceHeight,
stride, (int)(Display.AlphaThreshold * 255.0), 0xff000000, 24);
surf.UnlockRectangle();
return(retval);
}
