public PGDIRenderer(GDIContext gdi)
{
Graphics = new GDIRenderer(gdi);
HollowBrush = new GDIBrush(BrushStyle.Hollow, HatchStyle.Horizontal, (Colorref)0, Guid.NewGuid());
Graphics.UseDefaultPen();
Graphics.UseDefaultBrush();
}
public static GDIContext CreateForDisplay(string displayName)
{
IntPtr hdc = IntPtr.Zero;
hdc = GDI32.CreateDC("DISPLAY", displayName, null, IntPtr.Zero);
GDIContext newContext = new GDIContext(hdc, true);
return newContext;
}
public static GDIContext CreateForDevice(string device, string name)
{
IntPtr hdc = IntPtr.Zero;
hdc = GDI32.CreateDC(device, name, null, IntPtr.Zero);
GDIContext newContext = new GDIContext(hdc, true);
return newContext;
}
protected GDIPixmap(int width, int height, BitCount bitsperpixel)
: base(IntPtr.Zero, true)
{
if (bitsperpixel == BitCount.Bits24)
RectInfo = new PixelRectangleInfo(width, height, PixelLayout.Bgr, PixelComponentType.Byte, Alignment);
else
RectInfo = new PixelRectangleInfo(width, height, PixelLayout.Bgra, PixelComponentType.Byte, Alignment);
this.fBitCount = bitsperpixel;
GDIContext context = GDIContext.CreateForDefaultDisplay();
IntPtr theHandle = CreatePixmapHandle(Width, Height, bitsperpixel);
SetHandle(theHandle);
fMemoryContext = GDIContext.CreateForMemory();
m_OldBMHandle = fMemoryContext.SelectObject(this);
}
public Form1()
:base("GDI Video", 10, 10, 1024, 480)
{
fScreenContext = GDIContext.CreateForDefaultDisplay();
fCamera = new VfwCameraDevice(0, 320, 240, 15, User32.WS_CHILD | User32.WS_VISIBLE, this.Handle);
//fCamera = new VfwCameraDevice(320, 240);
fCamera.FrameDelegate = FrameReceived;
fBitmapInfo = fCamera.GetBitmapInfo();
fDecompressor = VfwDeCompressor.Create(Vfw.ICTYPE_VIDEO);
// Allocate a pixel buffer to receive decompressed bits
//fPixelBuffer = new PixelBuffer24(fCamera.Width, fCamera.Height);
//fCamera.StartStreaming();
fCamera.PreviewRate = 33;
//fCamera.ShowPreviewWindow();
fCaptureDispatcher = new TimedDispatcher(1.0 / 15, CaptureFrame, null);
fCaptureDispatcher.Start();
}
public static uint SelectFont(GDIContext hdc, System.Drawing.Font font)
{
GDI32.SelectObject(hdc, font.ToHfont());
uint size = GDI32.GetOutlineTextMetrics(hdc, 0, IntPtr.Zero);
if (size != uint.MaxValue)
{
UnmanagedMemory otm = new UnmanagedMemory((int)size);
uint err = GDI32.GetOutlineTextMetrics(hdc, size, otm.MemoryPointer);
uint otmEMSquare = (uint)Marshal.ReadInt32(otm, 92);
otm.Dispose();
LOGFONT log = new LOGFONT();
font.ToLogFont(log);
log.lfHeight = -(int)otmEMSquare;
font = System.Drawing.Font.FromLogFont(log);
GDI32.SelectObject(hdc, font.ToHfont());
}
return size;
}
public static ushort GetGlyph(GDIContext hdc, uint uchar, out float2[] pnts, out sbyte[] onCurve, out short advanceWidth)
{
MAT2 mat = new MAT2();
IntPtr matPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(MAT2)));
Marshal.StructureToPtr(mat, matPtr, true);
IntPtr gmPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(GLYPHMETRICS)));
int sz = GDI32.GetGlyphOutline(hdc, uchar, GDI32.GGO_NATIVE, gmPtr, 0, IntPtr.Zero, matPtr);
GLYPHMETRICS gm = (GLYPHMETRICS)Marshal.PtrToStructure(gmPtr, typeof(GLYPHMETRICS));
advanceWidth = gm.gmCellIncX;
IntPtr gbufPtr = Marshal.AllocCoTaskMem(sz);
int err0 = GDI32.GetGlyphOutline(hdc, uchar, GDI32.GGO_NATIVE, gmPtr, sz, gbufPtr, matPtr);
return GetOutline(new UnmanagedPointer(gbufPtr), sz, out pnts, out onCurve);
}
public GDIView(GDIContext dc)
{
fDeviceContext = dc;
}
internal GDIInfoContext(GDIContext aDC)
: this(GDI32.CreateCompatibleDC(aDC), true)
{
}
// get the combined world to device coordinate space mapping
public bool GetDPtoLP(GDIContext hDC)
{
if (!GDI32.GetWorldTransform(hDC, out fMatrix))
return false;
POINT origin = new POINT();
GDI32.GetWindowOrgEx(hDC, out origin);
Translate(-(float)origin.X, -(float)origin.Y);
SIZE sizew = new SIZE();
SIZE sizev = new SIZE();
GDI32.GetWindowExtEx(hDC, out sizew);
GDI32.GetViewportExtEx(hDC, out sizev);
Scale((float)sizew.Width / sizev.Height, (float)sizew.Height / sizev.Height);
GDI32.GetViewportOrgEx(hDC, out origin);
Translate((float)origin.X, (float)origin.Y);
return true;
}
/// <summary>
/// Create a GDIContext so that drawing to the desktop can occur.
/// On Vista, the drawing will be behind all windows, but will draw on top
/// of any icons on the actual desktop.
/// For Windows XP, the drawing will be behind those icons as well.
/// </summary>
/// <returns>The Device Context for drawing to the desktop background.</returns>
public static GDIContext CreateForDesktopBackground()
{
IntPtr hDC = IntPtr.Zero;
// First get a handle on the Program Manager window using FindWindow
IntPtr hProgMan = User32.FindWindow("ProgMan", null);
if (IntPtr.Zero != hProgMan)
{
// The only child of this window is the Shell Window
// So get that handle.
IntPtr hShellView = User32.GetWindow(hProgMan, User32.GW_CHILD);
// Now that we have the shell window, get the ListView, which is the
// child displaying everything.
IntPtr hListView = User32.GetWindow(hShellView, User32.GW_CHILD);
// Finally, get the DeviceContext handle for this list view
hDC = User32.GetDC(hListView);
}
else
{
// If null was returned, then we're probably on Vista, and need to ask for
// The "Program Manager" window.
if (IntPtr.Zero == hProgMan)
{
hProgMan = User32.FindWindow("Program Manager", null);
hDC = User32.GetDC(hProgMan);
}
}
// And create a GDIContext for it
GDIContext aContext = new GDIContext(hDC, false);
return aContext;
}
public static GDIContext CreateForWindowClientArea(IntPtr hWnd)
{
IntPtr hdc = IntPtr.Zero;
hdc = User32.GetDC(hWnd);
//hdc = User32.GetDCEx(hWnd, IntPtr.Zero, DeviceContextValues.Window);
GDIContext newContext = new GDIContext(hdc, false);
return newContext;
}
public static GDIContext CreateForWholeWindow(IntPtr hWnd)
{
IntPtr hdc = IntPtr.Zero;
hdc = User32.GetWindowDC(hWnd);
GDIContext newContext = new GDIContext(hdc, false);
return newContext;
}
public static GDIContext CreateForMemory()
{
IntPtr hdc;
hdc = GDI32.CreateCompatibleDC(GDIContext.CreateForDefaultDisplay());
GDIContext newConText = new GDIContext(hdc, true);
return newConText;
}
public static GDIContext CreateForAllAttachedMonitors()
{
IntPtr hdc = IntPtr.Zero;
hdc = GDI32.CreateDC("DISPLAY", null, null, IntPtr.Zero);
GDIContext newContext = new GDIContext(hdc, true);
// public static IntPtr CreateDC(string lpszDriver, string lpszDevice, IntPtr lpInitData);
return newContext;
}
public static bool IsTrueType(GDIContext hdc, System.Drawing.Font font)
{
GDI32.SelectObject(hdc, font.ToHfont());
UnmanagedMemory tmPtr = new UnmanagedMemory(Marshal.SizeOf(typeof(TEXTMETRIC)));
uint err = GDI32.GetTextMetrics(hdc, tmPtr.MemoryPointer);
TEXTMETRIC tm = (TEXTMETRIC)Marshal.PtrToStructure(tmPtr.MemoryPointer, typeof(TEXTMETRIC));
tmPtr.Dispose();
return (tm.tmPitchAndFamily & 4) != 0;
}
public static GDIContext CreateForDefaultDisplay()
{
IntPtr hdc = IntPtr.Zero;
hdc = User32.GetWindowDC(User32.GetDesktopWindow());
GDIContext newContext = new GDIContext(hdc, false);
return newContext;
}
