internal void Dispose(bool disposing)
{
if (_disposed)
{
return;
}
Disposing?.Invoke(this, EventArgs.Empty);
_disposed = true;
DisposeFont(disposing);
switch (DeviceContextType)
{
case DeviceContextType.Display:
Debug.Assert(disposing, "WARNING: Finalizing a Display DeviceContext.\r\nReleaseDC may fail when not called from the same thread GetDC was called from.");
((IDeviceContext)this).ReleaseHdc();
break;
case DeviceContextType.Information:
case DeviceContextType.NamedDevice:
// CreateDC and CreateIC add an HDC handle to the HandleCollector; to remove it properly we need
// to call DeleteHDC.
#if TRACK_HDC
Debug.WriteLine(DbgUtil.StackTraceToStr(String.Format("DC.DeleteHDC(hdc=0x{0:x8})", unchecked ((int)this.hDC))));
#endif
Gdi32.DeleteDC(_hDC);
_hDC = IntPtr.Zero;
break;
case DeviceContextType.Memory:
// CreatCompatibleDC adds a GDI handle to HandleCollector, to remove it properly we need to call
// DeleteDC.
#if TRACK_HDC
Debug.WriteLine(DbgUtil.StackTraceToStr(String.Format("DC.DeleteDC(hdc=0x{0:x8})", unchecked ((int)this.hDC))));
#endif
Gdi32.DeleteDC(_hDC);
_hDC = IntPtr.Zero;
break;
case DeviceContextType.Unknown:
default:
return;
// do nothing, the hdc is not owned by this object.
// in this case it is ok if disposed throught finalization.
}
DbgUtil.AssertFinalization(this, disposing);
}
static public void DrawXORRectangle(Graphics graphics, Pen pen, Rectangle rectangle)
{
IntPtr hDC = graphics.GetHdc();
IntPtr hPen = Gdi32.CreatePen(0, (int)pen.Width, ArgbToRGB(pen.Color.ToArgb()));
Gdi32.SelectObject(hDC, hPen);
Gdi32.SetROP2(hDC, (int)Gdi32.DrawingMode.R2_NOTXORPEN);
Gdi32.Rectangle(hDC, rectangle.Left, rectangle.Top, rectangle.Right, rectangle.Bottom);
Gdi32.DeleteObject(hPen);
graphics.ReleaseHdc(hDC);
}
private static void Initialize()
{
if (s_isInitialized)
{
return;
}
using var dc = User32.GetDcScope.ScreenDC;
s_deviceDpi = Gdi32.GetDeviceCaps(dc, Gdi32.DeviceCapability.LOGPIXELSX);
s_isInitialized = true;
}
private static void Initialize()
{
if (isInitialized)
{
return;
}
using ScreenDC dc = ScreenDC.Create();
deviceDpi = Gdi32.GetDeviceCaps(dc, Gdi32.DeviceCapability.LOGPIXELSX);
isInitialized = true;
}
/// <summary>
/// Draws scanned image to an image object
/// </summary>
/// <param name="image"></param>
public void CopyTo(Image image)
{
Debug.Assert(image != null);
using (Graphics g = Graphics.FromImage(image))
{
IntPtr hdc = g.GetHdc();
Gdi32.SetDIBitsToDevice(hdc, 0, 0, image.Width, image.Height, 0, 0, 0, Rect.Height, PxPtr, BmpPtr, 0);
g.ReleaseHdc(hdc);
}
}
public NotificationForm(string title, string desc)
{
InitializeComponent();
this.components.SetStyle(this);
Region = Region.FromHrgn(Gdi32.CreateRoundRectRgn(0, 0, Width, Height, 0, 0));
// this.lbl_title.Text = title;
this.txtBox_desc.Text = desc;
lbl_time.Text = DateTime.Now.ToString("HH:mm");
}
public static FontCache.Scope GetHFONT(Font?font, Gdi32.QUALITY quality, Gdi32.HDC hdc)
{
if (font != null)
{
return(GetHFONT(font, quality));
}
// Font is null, build off of the specified HDC's current font.
Gdi32.HFONT hfont = (Gdi32.HFONT)Gdi32.GetCurrentObject(hdc, Gdi32.OBJ.FONT);
return(new FontCache.Scope(hfont));;
}
internal void Close()
{
if (Region != IntPtr.Zero)
{
User32.SetWindowRgn(Handle, IntPtr.Zero, false);
Gdi32.DeleteObject(Region);
}
User32.CloseWindow(Handle);
User32.SetParent((int)Handle, 0);
User32.DestroyWindow(Handle);
}
public void ResetFont()
{
#if OPTIMIZED_MEASUREMENTDC
// in this case, GDI will copy back the previously saved font into the DC.
// we dont actually know what the font is in our measurement DC so
// we need to clear it off.
MeasurementDCInfo.ResetIfIsMeasurementDC(Hdc);
#endif
Gdi32.SelectObject(new HandleRef(this, Hdc), hInitialFont);
selectedFont = null;
hCurrentFont = hInitialFont;
}
public Color GetColor(int x, int y)
{
IntPtr hdc = User32.GetDC(IntPtr.Zero);
uint pixel = Gdi32.GetPixel(hdc, x, y);
User32.ReleaseDC(IntPtr.Zero, hdc);
Color color = Color.FromArgb((int)(pixel & 0x000000FF),
(int)(pixel & 0x0000FF00) >> 8,
(int)(pixel & 0x00FF0000) >> 16);
return(color);
}
/// <summary>Rounds the region of the control.</summary>
/// <param name="control">The control to round.</param>
/// <param name="rounding">The amount of rounding.</param>
public static void RoundRegion(Control control, int rounding)
{
try
{
control.Region = Region.FromHrgn(Gdi32.CreateRoundRectRgn(0, 0, control.Width, control.Height, rounding, rounding));
}
catch (Exception e)
{
Console.WriteLine(e);
throw;
}
}
// Not all state is handled yet. Backfilling in as we write specific tests. Of special note is that we don't
// have tracking for Save/RestoreDC yet.
/// <summary>
/// Initialize the current state of <paramref name="hdc"/>.
/// </summary>
public DeviceContextState(Gdi32.HDC hdc)
{
MapMode = Gdi32.GetMapMode(hdc);
BackColor = Gdi32.GetBkColor(hdc);
TextColor = Gdi32.GetTextColor(hdc);
Point point = default;
Gdi32.GetBrushOrgEx(hdc, ref point);
BrushOrigin = point;
TextAlign = Gdi32.GetTextAlign(hdc);
BackgroundMode = Gdi32.GetBkMode(hdc);
}
static public void DrawXORLine(Graphics graphics, Pen pen, int x1, int y1, int x2, int y2)
{
IntPtr hDC = graphics.GetHdc();
IntPtr hPen = Gdi32.CreatePen(0, (int)pen.Width, ArgbToRGB(pen.Color.ToArgb()));
Gdi32.SelectObject(hDC, hPen);
Gdi32.SetROP2(hDC, (int)Gdi32.DrawingMode.R2_NOTXORPEN);
Gdi32.MoveToEx(hDC, x1, y1, ref nullPoint);
Gdi32.LineTo(hDC, x2, y2);
Gdi32.DeleteObject(hPen);
graphics.ReleaseHdc(hDC);
}
/// <para>Changes the current bitmap with a custom opacity level. Here is where all happens!</para>
public void SetBitmap(Bitmap bitmap, byte opacity)
{
if (bitmap.PixelFormat != PixelFormat.Format32bppArgb)
{
throw new ApplicationException("The bitmap must be 32ppp with alpha-channel.");
}
// The ideia of this is very simple,
// 1. Create a compatible DC with screen;
// 2. Select the bitmap with 32bpp with alpha-channel in the compatible DC;
// 3. Call the UpdateLayeredWindow.
var screenDc = Win32.GetDC(IntPtr.Zero);
using (var memDc = new Gdi32.SafeDCHandle(Gdi32.CreateCompatibleDC(screenDc)))
{
var hBitmap = IntPtr.Zero;
var oldBitmap = IntPtr.Zero;
try
{
hBitmap = bitmap.GetHbitmap(Color.FromArgb(0)); // grab a GDI handle from this GDI+ bitmap
oldBitmap = Gdi32.SelectObject(memDc, hBitmap);
var size = new Win32.Size(bitmap.Width, bitmap.Height);
var pointSource = new Win32.Point(0, 0);
var topPos = new Win32.Point(Left, Top);
var blend = new Win32.Blendfunction
{
BlendOp = Win32.AcSrcOver,
BlendFlags = 0,
SourceConstantAlpha = opacity,
AlphaFormat = Win32.AcSrcAlpha
};
Win32.UpdateLayeredWindow(Handle, screenDc, ref topPos, ref size, memDc.DangerousGetHandle(),
ref pointSource, 0, ref blend,
Win32.UlwAlpha);
}
finally
{
Win32.ReleaseDC(IntPtr.Zero, screenDc);
if (hBitmap != IntPtr.Zero)
{
Gdi32.SelectObject(memDc, oldBitmap);
//Windows.DeleteObject(hBitmap); // The documentation says that we have to use the Windows.DeleteObject... but since there is no such method I use the normal DeleteObject from Win32 GDI and it's working fine without any resource leak.
Gdi32.DeleteObject(hBitmap);
Size = bitmap.Size;
}
}
}
}
public static BitmapSource GetImageSourceFromBitmap(Bitmap bmp)
{
IntPtr hBmp = bmp.GetHbitmap();
BitmapSource src = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
hBmp,
IntPtr.Zero,
System.Windows.Int32Rect.Empty,
BitmapSizeOptions.FromWidthAndHeight(bmp.Width, bmp.Height));
Gdi32.DeleteObject(hBmp);
return(src);
}
/*
* DrawPoint
*/
/// <summary>
/// Draws the point on the specified graphics surface with the specified color at the specified
/// coordinates.
/// </summary>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="g"/> is <see langword="null"/>.
/// </exception>
public static void DrawPoint(Graphics g, Color color, int x, int y)
{
if (g == null)
{
throw new ArgumentNullException("g");
}
IntPtr hDC = g.GetHdc();
Gdi32.SetPixelV(hDC, x, y, color);
g.ReleaseHdc(hDC);
}
protected override void CreateBrush()
{
IntPtr nativeHandle = Gdi32.CreateSolidBrush(ColorTranslator.ToWin32(Color));
// Don't use Debug.Assert, DbgUtil.GetLastErrorStr would always be evaluated.
if (nativeHandle == IntPtr.Zero)
{
Debug.Fail("CreateSolidBrush failed : " + DbgUtil.GetLastErrorStr());
}
HBrush = nativeHandle;
}
private void _IconsLoadingThreadRun()
{
while (true)
{
if (this._ShellViewEx != null && this._ShellViewEx.IsSearchNavigating)
{
Thread.Sleep(1);
Application.DoEvents();
}
var index = 0;
if (!ThreadRun_Helper(this._IconsForRetreval, false, ref index))
{
continue;
}
var sho = this._ShellViewEx.Items[index];
var clonedSho = sho.Clone();
if (!sho.IsIconLoaded || !sho.IsRCWSet)
{
try {
//Thread.Sleep(1);
//Application.DoEvents();
//var temp = FileSystemListItem.ToFileSystemItem(sho.ParentHandle, sho.ParsingName.ToShellParsingName());
var icon = clonedSho.GetHBitmap(this._CurrentSize, false, true);
var shieldOverlay = 0;
if (sho.ShieldedIconIndex == -1)
{
if ((clonedSho.GetShield() & IExtractIconPWFlags.GIL_SHIELD) != 0)
{
shieldOverlay = this._ShieldIconIndex;
}
sho.ShieldedIconIndex = shieldOverlay;
}
if (icon != IntPtr.Zero || shieldOverlay > 0)
{
sho.IsIconLoaded = true;
sho.IsRCWSet = true;
Gdi32.DeleteObject(icon);
if (!this._RedrawQueue.Contains(index))
{
this._RedrawQueue.Enqueue(index);
}
// this._ShellViewEx.RedrawItem(index);
}
//Catch File not found exception since it happens if the file is laready deleted
} catch (FileNotFoundException) {
}
}
clonedSho.Dispose();
sho.Dispose();
}
}
private void DrawNCArea(IntPtr hRgn)
{
Region clipRegion = null;
if (hRgn != TRUE)
{
clipRegion = Region.FromHrgn(hRgn);
}
RECT windowRect = new RECT();
RECT nclientRect = new RECT();
RECT clientRect = new RECT();
User32.GetWindowRect(parentWindowHWnd, ref windowRect);
User32.OffsetRect(ref windowRect, -windowRect.left, -windowRect.top);
var height = windowRect.bottom;
var width = windowRect.right;
User32.GetClientRect(parentWindowHWnd, ref clientRect);
User32.OffsetRect(ref clientRect, -clientRect.left, -clientRect.top);
User32.GetClientRect(parentWindowHWnd, ref nclientRect);
User32.OffsetRect(ref nclientRect, -clientRect.left, -clientRect.top);
User32.OffsetRect(ref nclientRect, borderSize, borderSize);
IntPtr hDC = User32.GetWindowDC(parentWindowHWnd);
var windowRectangle = new Rectangle(windowRect.left, windowRect.top, (int)windowRect.Width, (int)windowRect.Height);
var clientRectangle = new Rectangle(nclientRect.left, nclientRect.top, (int)clientRect.Height, (int)clientRect.Width);
try
{
COLORREF color = new COLORREF(borderColor);
IntPtr hBrush = Gdi32.CreateSolidBrush(color.ColorDWORD);
Gdi32.ExcludeClipRect(hDC, nclientRect.left, nclientRect.top, nclientRect.right, nclientRect.bottom);
User32.FillRect(hDC, ref windowRect, hBrush);
Gdi32.DeleteObject(hBrush);
}
catch (Exception ex)
{
}
finally
{
User32.ReleaseDC(parentWindowHWnd, hDC);
}
}
private unsafe void MirrorDcIfNeeded(Gdi32.HDC hdc)
{
if (_parent.IsMirrored)
{
// Mirror the DC
Gdi32.SetMapMode(hdc, Gdi32.MM.ANISOTROPIC);
Gdi32.GetViewportExtEx(hdc, out Size originalExtents);
Gdi32.SetViewportExtEx(hdc, -originalExtents.Width, originalExtents.Height, null);
Gdi32.GetViewportOrgEx(hdc, out Point originalOrigin);
Gdi32.SetViewportOrgEx(hdc, originalOrigin.X + _windowBounds.Width - 1, originalOrigin.Y, null);
}
}
public AccSettings()
{
InitializeComponent();
this.components.SetStyle(this);
Region = Region.FromHrgn(Gdi32.CreateRoundRectRgn(0, 0, Width, Height, 5, 5));
foreach (var button in this.Controls.OfType <MetroFramework.Controls.MetroButton>())
{
IntPtr ptr = Gdi32.CreateRoundRectRgn(1, 1, button.Width, button.Height, 5, 5);
button.Region = Region.FromHrgn(ptr);
Gdi32.DeleteObject(ptr);
}
}
public Rectangle ToRectangle()
{
if (IsInfinite)
{
return(new Rectangle(-int.MaxValue, -int.MaxValue, int.MaxValue, int.MaxValue));
}
var rect = new RECT();
Gdi32.GetRgnBox(new HandleRef(this, nativeHandle), ref rect);
return(new Rectangle(new Point(rect.left, rect.top), rect.Size));
}
internal unsafe static void DrawLine(this Gdi32.HDC hdc, Gdi32.HPEN pen, int x1, int y1, int x2, int y2)
{
using var ropScope = new Gdi32.SetRop2Scope(hdc, Gdi32.R2.COPYPEN);
using var bkScope = new Gdi32.SetBkModeScope(hdc, Gdi32.BKMODE.TRANSPARENT);
using var selection = new Gdi32.SelectObjectScope(hdc, pen);
Point oldPoint = new Point();
Gdi32.MoveToEx(hdc, x1, y1, &oldPoint);
Gdi32.LineTo(hdc, x2, y2);
Gdi32.MoveToEx(hdc, oldPoint.X, oldPoint.Y, &oldPoint);
}
public AddAcc()
{
InitializeComponent(); this.Activate();
this.components.SetStyle(this);
this.FormBorderStyle = FormBorderStyle.None;
Region = System.Drawing.Region.FromHrgn(Gdi32.CreateRoundRectRgn(0, 0, Width, Height, 5, 5));
IntPtr ptr = Gdi32.CreateRoundRectRgn(1, 1, btn_addAcc.Width, btn_addAcc.Height, 5, 5);
btn_addAcc.Region = Region.FromHrgn(ptr);
Gdi32.DeleteObject(ptr);
}
// capture a region of a the screen, defined by the hWnd
public static BitmapSource CaptureRegion(
IntPtr hWnd, int x, int y, int width, int height, bool addToClipboard)
{
IntPtr sourceDC = IntPtr.Zero;
IntPtr targetDC = IntPtr.Zero;
IntPtr compatibleBitmapHandle = IntPtr.Zero;
BitmapSource bitmap = null;
try
{
// gets the main desktop and all open windows
sourceDC = User32.GetDC(User32.GetDesktopWindow());
//sourceDC = User32.GetDC(hWnd);
targetDC = Gdi32.CreateCompatibleDC(sourceDC);
// create a bitmap compatible with our target DC
compatibleBitmapHandle = Gdi32.CreateCompatibleBitmap(sourceDC, width, height);
// gets the bitmap into the target device context
Gdi32.SelectObject(targetDC, compatibleBitmapHandle);
// copy from source to destination
Gdi32.BitBlt(targetDC, 0, 0, width, height, sourceDC, x, y, Gdi32.SRCCOPY);
// Here's the WPF glue to make it all work. It converts from an
// hBitmap to a BitmapSource. Love the WPF interop functions
bitmap = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
compatibleBitmapHandle, IntPtr.Zero, Int32Rect.Empty,
BitmapSizeOptions.FromEmptyOptions());
if (addToClipboard)
{
//Clipboard.SetImage(bitmap); // high memory usage for large images
IDataObject data = new DataObject();
data.SetData(DataFormats.Dib, bitmap, false);
Clipboard.SetDataObject(data, false);
}
}
catch (Exception ex)
{
throw new ScreenCaptureException(string.Format("Error capturing region {0},{1},{2},{3}", x, y, width, height), ex);
}
finally
{
Gdi32.DeleteObject(compatibleBitmapHandle);
User32.ReleaseDC(IntPtr.Zero, sourceDC);
User32.ReleaseDC(IntPtr.Zero, targetDC);
}
return(bitmap);
}
/// <summary>
/// Draws the text in the given bounds, using the given Font, foreColor and backColor, and according to the specified
/// TextFormatFlags flags.
///
/// If font is null, the font currently selected in the hdc is used.
///
/// If foreColor and/or backColor are Color.Empty, the hdc current text and/or background color are used.
/// </summary>
public static void DrawText(
this Gdi32.HDC hdc,
ReadOnlySpan <char> text,
FontCache.Scope font,
Rectangle bounds,
Color foreColor,
User32.DT flags,
Color backColor = default,
TextPaddingOptions padding = default)
{
if (text.IsEmpty || foreColor == Color.Transparent)
{
return;
}
ValidateFlags(flags);
// DrawText requires default text alignment.
using var alignment = new Gdi32.SetTextAlignmentScope(hdc, default);
// Color empty means use the one currently selected in the dc.
using var textColor = foreColor.IsEmpty ? default : new Gdi32.SetTextColorScope(hdc, foreColor);
using var fontSelection = new Gdi32.SelectObjectScope(hdc, (Gdi32.HFONT)font);
Gdi32.BKMODE newBackGroundMode = (backColor.IsEmpty || backColor == Color.Transparent) ?
Gdi32.BKMODE.TRANSPARENT :
Gdi32.BKMODE.OPAQUE;
using var backgroundMode = new Gdi32.SetBkModeScope(hdc, newBackGroundMode);
using var backgroundColor = newBackGroundMode != Gdi32.BKMODE.TRANSPARENT
? new Gdi32.SetBackgroundColorScope(hdc, backColor)
: default;
User32.DRAWTEXTPARAMS dtparams = GetTextMargins(font, padding);
bounds = AdjustForVerticalAlignment(hdc, text, bounds, flags, ref dtparams);
// Adjust unbounded rect to avoid overflow since Rectangle ctr does not do param validation.
if (bounds.Width == TextRenderer.MaxSize.Width)
{
bounds.Width -= bounds.X;
}
if (bounds.Height == TextRenderer.MaxSize.Height)
{
bounds.Height -= bounds.Y;
}
RECT rect = bounds;
User32.DrawTextExW(hdc, text, ref rect, flags, ref dtparams);
}
public override void Create()
{
this.wndProc = new WndProc(WndProc);
WndClass wndClass;
wndClass.style = ClassStyles.HorizontalRedraw | ClassStyles.VerticalRedraw | ClassStyles.OwnDC;
wndClass.lpfnWndProc = wndProc;
wndClass.cbClsExtra = 0;
wndClass.cbWndExtra = 0;
wndClass.hInstance = hInstance;
wndClass.hIcon = User32.LoadIcon(IntPtr.Zero, SystemIcons.Application);
wndClass.hCursor = User32.LoadCursor(IntPtr.Zero, IdcStandardCursors.Arrow);
wndClass.hbrBackground = Gdi32.GetStockObject(StockObjects.BlackBrush);
wndClass.lpszMenuName = null;
wndClass.lpszClassName = className;
if (User32.RegisterClass(ref wndClass) == 0)
{
throw new WindowException("RegisterClass failed");
}
WindowStyles dwStyle = WindowStyles.Popup | WindowStyles.ClipChildren | WindowStyles.ClipSiblings;
if (Mode == WindowMode.Windowed)
{
dwStyle |= WindowStyles.SysMenu | WindowStyles.Caption;
}
Handle = User32.CreateWindowEx(
WindowStylesEx.Left,
className,
Title,
dwStyle,
X,
Y,
Width,
Height,
IntPtr.Zero, // hWndParent
IntPtr.Zero, // hMenu
hInstance,
IntPtr.Zero); // lpParam
if (Handle == IntPtr.Zero)
{
throw new WindowException("CreateWindowEx failed");
}
OnCreated();
AdjustWindow(X, Y, Width, Height);
}
internal static void GetDevicePixels(HandleRef handleRef, out double x, out double y)
{
x = LogicalDpi;
y = LogicalDpi;
Gdi32.HDC hDC = User32.GetDC(handleRef);
if (!hDC.IsNull)
{
x = Gdi32.GetDeviceCaps(hDC, Gdi32.DeviceCapability.LOGPIXELSX);
y = Gdi32.GetDeviceCaps(hDC, Gdi32.DeviceCapability.LOGPIXELSY);
User32.ReleaseDC(handleRef, hDC);
}
}
private bool GetTextExtentPoint32(char item, out Size size)
{
size = new Size();
using var hdc = new GetDcScope(_owningChildEdit.Handle);
if (hdc.IsNull)
{
return(false);
}
// Add the width of the character at that position.
return(Gdi32.GetTextExtentPoint32W(hdc, item.ToString(), 1, ref size).IsTrue());
}
/// <summary>Rounds the region of the control.</summary>
/// <param name="form">The form control to round.</param>
/// <param name="rounding">The amount of rounding.</param>
public static void RoundRegion(Form form, int rounding)
{
try
{
form.FormBorderStyle = FormBorderStyle.None;
form.Region = Region.FromHrgn(Gdi32.CreateRoundRectRgn(0, 0, form.Width, form.Height, rounding, rounding));
}
catch (Exception e)
{
Console.WriteLine(e);
throw;
}
}
