private void ProcessMonoMask(DeviceContextProxy context,
bool isMono, ref PointerInfo info, out int width, out int height, out int left, out int top)
{
var deskWidth = sharedDescription.Width;
var deskHeight = sharedDescription.Height;
var givenLeft = info.Position.X;
var givenTop = info.Position.Y;
if (givenLeft < 0)
{
width = givenLeft + info.ShapeInfo.Width;
}
else if (givenLeft + info.ShapeInfo.Width > deskWidth)
{
width = deskWidth - givenLeft;
}
else
{
width = info.ShapeInfo.Width;
}
if (isMono)
{
info.ShapeInfo.Height /= 2;
}
if (givenTop < 0)
{
height = givenTop + info.ShapeInfo.Height;
}
else if (givenTop + info.ShapeInfo.Height > deskHeight)
{
height = deskHeight - givenTop;
}
else
{
height = info.ShapeInfo.Height;
}
if (isMono)
{
info.ShapeInfo.Height *= 2;
}
left = givenLeft < 0 ? 0 : givenLeft;
top = givenTop < 0 ? 0 : givenTop;
stageTextureDesc.Width = width;
stageTextureDesc.Height = height;
if (initBuffer.Length != width * height * BPP)
{
initBuffer = new byte[width * height * BPP];
}
if (copyBuffer == null || stageTextureDesc.Width != width || stageTextureDesc.Height != height)
{
RemoveAndDispose(ref copyBuffer);
copyBuffer = new Texture2D(context, stageTextureDesc);
}
context.CopySubresourceRegion(SharedTexture, 0,
new global::SharpDX.Direct3D11.ResourceRegion(left, top, 0, left + width, top + height, 1), copyBuffer, 0);
var dataBox = context.MapSubresource(copyBuffer, 0, global::SharpDX.Direct3D11.MapMode.Read, global::SharpDX.Direct3D11.MapFlags.None);
#region process
unsafe // Call unmanaged code
{
fixed(byte *initBufferPtr = initBuffer)
{
var initBuffer32 = (uint *)initBufferPtr;
var desktop32 = (uint *)dataBox.DataPointer;
var desktopPitchInPixels = dataBox.RowPitch / sizeof(int);
var skipX = (givenLeft < 0) ? (uint)(-1 * givenLeft) : 0;
var skipY = (givenTop < 0) ? (uint)(-1 * givenTop) : 0;
if (isMono)
{
for (var row = 0; row < stageTextureDesc.Height; ++row)
{
// Set mask
byte Mask = 0x80;
Mask = (byte)(Mask >> (byte)(skipX % 8));
for (var col = 0; col < stageTextureDesc.Width; ++col)
{
// Get masks using appropriate offsets
var AndMask = (byte)(info.PtrShapeBuffer[((col + skipX) / 8) + ((row + skipY) * (info.ShapeInfo.Pitch))] & Mask);
var XorMask = (byte)(info.PtrShapeBuffer[((col + skipX) / 8) + ((row + skipY + (info.ShapeInfo.Height / 2))
* (info.ShapeInfo.Pitch))] & Mask);
var AndMask32 = (AndMask > 0) ? 0xFFFFFFFF : 0xFF000000;
var XorMask32 = (XorMask > 0) ? (uint)0x00FFFFFF : 0x00000000;
// Set new pixel
initBuffer32[(row * stageTextureDesc.Width) + col] = (desktop32[(row * desktopPitchInPixels) + col] & AndMask32) ^ XorMask32;
// Adjust mask
if (Mask == 0x01)
{
Mask = 0x80;
}
else
{
Mask = (byte)(Mask >> 1);
}
}
}
}
else
{
fixed(byte *shapeBufferPtr = info.PtrShapeBuffer)
{
var Buffer32 = (uint *)shapeBufferPtr;
// Iterate through pixels
for (var row = 0; row < stageTextureDesc.Height; ++row)
{
for (var col = 0; col < stageTextureDesc.Width; ++col)
{
// Set up mask
var MaskVal = 0xFF000000 & Buffer32[(col + skipX) + ((row + skipY) * (info.ShapeInfo.Pitch / sizeof(uint)))];
if (MaskVal > 0)
{
// Mask was 0xFF
initBuffer32[(row * stageTextureDesc.Width) + col] = (desktop32[(row * desktopPitchInPixels) + col]
^ Buffer32[(col + skipX) + ((row + skipY) * (info.ShapeInfo.Pitch / sizeof(uint)))]) | 0xFF000000;
}
else
{
// Mask was 0x00
initBuffer32[(row * stageTextureDesc.Width) + col]
= Buffer32[(col + skipX) + ((row + skipY) * (info.ShapeInfo.Pitch / sizeof(uint)))] | 0xFF000000;
}
}
}
}
}
}
}
#endregion
context.UnmapSubresource(copyBuffer, 0);
}