mirror of https://github.com/dahall/Vanara.git
246 lines
11 KiB
C#
246 lines
11 KiB
C#
using System;
|
|
using System.Drawing;
|
|
using System.Drawing.Drawing2D;
|
|
using Vanara.Extensions;
|
|
using static Vanara.PInvoke.Gdi32;
|
|
using static Vanara.PInvoke.User32;
|
|
|
|
namespace Vanara.PInvoke
|
|
{
|
|
/// <summary>Extension methods to convert GdiObj handle variants to their .NET equivalents.</summary>
|
|
public static class GdiObjExtensions2
|
|
{
|
|
/// <summary>
|
|
/// Draws on a device context ( <see cref="SafeHDC"/>) via a DIB section. This is useful when you need to draw on a transparent background.
|
|
/// </summary>
|
|
/// <param name="hdc">The device context.</param>
|
|
/// <param name="bounds">The bounds of the device context to paint.</param>
|
|
/// <param name="drawMethod">The draw method.</param>
|
|
public static void DrawViaDIB(this IDeviceContext hdc, in RECT bounds, Action<SafeHDC, RECT> drawMethod)
|
|
{
|
|
IntPtr h = hdc.GetHdc();
|
|
try { GdiObjExtensions.DrawViaDIB(h, bounds, drawMethod); }
|
|
finally { hdc.ReleaseHdc(); }
|
|
}
|
|
|
|
/// <summary>Gets the copy of the device handle in an IDeviceContext supporting GDI+.</summary>
|
|
/// <param name="dc">The <see cref="IDeviceContext"/> instance.</param>
|
|
/// <returns>A <see cref="SafeHDC"/> instance that contains a copy of the context.</returns>
|
|
public static SafeHDC GetCompatibleSafeHDC(this IDeviceContext dc)
|
|
{
|
|
if (dc is null)
|
|
{
|
|
return new(default, false);
|
|
}
|
|
|
|
SafeHDC hdc = CreateCompatibleDC(dc.GetHdc());
|
|
dc.ReleaseHdc();
|
|
return hdc;
|
|
}
|
|
|
|
/// <summary>Creates a <see cref="Bitmap"/> from an <see cref="SafeHBITMAP"/> preserving transparency, if possible.</summary>
|
|
/// <param name="hbmp">The SafeHBITMAP value.</param>
|
|
/// <returns>The Bitmap instance. If <paramref name="hbmp"/> is a <c>NULL</c> handle, <see langword="null"/> is returned.</returns>
|
|
public static Bitmap ToBitmap(this SafeHBITMAP hbmp) => ToBitmap((HBITMAP)hbmp);
|
|
|
|
/// <summary>Creates a <see cref="Bitmap"/> from an <see cref="HBITMAP"/> preserving transparency, if possible.</summary>
|
|
/// <param name="hbmp">The HBITMAP value.</param>
|
|
/// <returns>The Bitmap instance. If <paramref name="hbmp"/> is a <c>NULL</c> handle, <see langword="null"/> is returned.</returns>
|
|
public static Bitmap ToBitmap(this in HBITMAP hbmp) => Image.FromHbitmap((IntPtr)hbmp);
|
|
|
|
/// <summary>Creates a managed <see cref="Bitmap"/> from a HICON instance.</summary>
|
|
/// <returns>A managed bitmap instance.</returns>
|
|
public static Bitmap ToBitmap(this in HICON hIcon) => hIcon.IsNull ? null : (Bitmap)Bitmap.FromHicon((IntPtr)hIcon).Clone();
|
|
|
|
/// <summary>Creates a managed <see cref="Bitmap"/> from a SafeHICON instance.</summary>
|
|
/// <returns>A managed bitmap instance.</returns>
|
|
public static Bitmap ToBitmap(this SafeHICON hIcon) => ToBitmap((HICON)hIcon);
|
|
|
|
/// <summary>Creates a managed <see cref="Brush"/> from this HBRUSH instance.</summary>
|
|
/// <param name="hbr">The HBRUSH value.</param>
|
|
/// <returns>A managed brush instance.</returns>
|
|
public static Brush ToBrush(this in HBRUSH hbr) => hbr.IsNull ? null : new NativeBrush(hbr);
|
|
|
|
/// <summary>Creates a managed <see cref="Brush"/> from this HBRUSH instance.</summary>
|
|
/// <param name="hbr">The HBRUSH value.</param>
|
|
/// <returns>A managed brush instance.</returns>
|
|
public static Brush ToBrush(this SafeHBRUSH hbr) => ((HBRUSH)hbr).ToBrush();
|
|
|
|
/// <summary>Creates a <see cref="Font"/> from an <see cref="HFONT"/>.</summary>
|
|
/// <param name="hf">The HFONT value.</param>
|
|
/// <returns>The Font instance.</returns>
|
|
public static Font ToFont(this in HFONT hf) => hf.IsNull ? null : Font.FromHfont((IntPtr)hf);
|
|
|
|
/// <summary>Creates a <see cref="Font"/> from an <see cref="HFONT"/>.</summary>
|
|
/// <param name="hf">The HFONT value.</param>
|
|
/// <returns>The Font instance.</returns>
|
|
public static Font ToFont(this SafeHFONT hf) => ((HFONT)hf).ToFont();
|
|
|
|
/// <summary>Creates a managed <see cref="Icon"/> from an HICON instance.</summary>
|
|
/// <returns>A managed icon instance.</returns>
|
|
public static Icon ToIcon(this in HICON hIcon) => hIcon.IsNull ? null : (Icon)Icon.FromHandle((IntPtr)hIcon).Clone();
|
|
|
|
/// <summary>Creates a managed <see cref="Icon"/> from a SafeHICON instance.</summary>
|
|
/// <returns>A managed icon instance.</returns>
|
|
public static Icon ToIcon(this SafeHICON hIcon) => ToIcon((HICON)hIcon);
|
|
|
|
/// <summary>Creates a <see cref="Pen"/> from an <see cref="HPEN"/>.</summary>
|
|
/// <param name="hpen">The HPEN value.</param>
|
|
/// <returns>The Pen instance.</returns>
|
|
public static Pen ToPen(this in HPEN hpen)
|
|
{
|
|
using InteropServices.ISafeMemoryHandle ptr = GetObject(hpen);
|
|
EXTLOGPEN lpen = ptr.ToStructure<EXTLOGPEN>();
|
|
Pen pen = null;
|
|
switch (lpen.elpBrushStyle)
|
|
{
|
|
case BrushStyle.BS_DIBPATTERN:
|
|
case BrushStyle.BS_DIBPATTERNPT:
|
|
DIBColorMode lw = (DIBColorMode)(uint)lpen.elpColor;
|
|
SafeHBRUSH hb = CreateDIBPatternBrushPt(lpen.elpHatch, lw);
|
|
pen = new Pen(((HBRUSH)hb).ToBrush());
|
|
break;
|
|
|
|
case BrushStyle.BS_HATCHED:
|
|
HatchBrush hbr = new HatchBrush((System.Drawing.Drawing2D.HatchStyle)lpen.elpHatch.ToInt32(), lpen.elpColor);
|
|
pen = new Pen(hbr);
|
|
break;
|
|
|
|
case BrushStyle.BS_PATTERN:
|
|
TextureBrush pbr = new TextureBrush(Image.FromHbitmap(lpen.elpHatch));
|
|
pen = new Pen(pbr);
|
|
break;
|
|
|
|
case BrushStyle.BS_HOLLOW:
|
|
case BrushStyle.BS_SOLID:
|
|
default:
|
|
pen = new Pen(lpen.elpColor) { DashStyle = (DashStyle)lpen.Style };
|
|
if (pen.DashStyle == DashStyle.Custom && lpen.elpNumEntries > 0)
|
|
{
|
|
uint[] styleArray = lpen.elpStyleEntry.ToArray<uint>((int)lpen.elpNumEntries);
|
|
pen.DashPattern = Array.ConvertAll(styleArray, i => (float)i);
|
|
}
|
|
break;
|
|
}
|
|
if (lpen.Type == Gdi32.PenType.PS_GEOMETRIC)
|
|
{
|
|
pen.LineJoin = lpen.Join == PenJoin.PS_JOIN_MITER ? LineJoin.Miter : (lpen.Join == PenJoin.PS_JOIN_BEVEL ? LineJoin.Bevel : LineJoin.Round);
|
|
pen.EndCap = pen.StartCap = lpen.EndCap == PenEndCap.PS_ENDCAP_FLAT ? LineCap.Flat : (lpen.EndCap == PenEndCap.PS_ENDCAP_SQUARE ? LineCap.Square : LineCap.Round);
|
|
pen.Width = LogicalWidthToDeviceWidth((int)lpen.elpWidth);
|
|
}
|
|
else
|
|
{
|
|
pen.Width = lpen.elpWidth;
|
|
}
|
|
return pen;
|
|
}
|
|
|
|
/// <summary>Creates a <see cref="Pen"/> from an <see cref="HPEN"/>.</summary>
|
|
/// <param name="hpen">The HPEN value.</param>
|
|
/// <returns>The Pen instance.</returns>
|
|
public static Pen ToPen(this SafeHPEN hpen) => ((HPEN)hpen).ToPen();
|
|
|
|
/// <summary>Creates a <see cref="Region"/> from an <see cref="HRGN"/>.</summary>
|
|
/// <param name="hrgn">The HRGN value.</param>
|
|
/// <returns>The Region instance.</returns>
|
|
public static Region ToRegion(this in HRGN hrgn) => hrgn.IsNull ? null : Region.FromHrgn((IntPtr)hrgn);
|
|
|
|
/// <summary>Creates a <see cref="Region"/> from an <see cref="HRGN"/>.</summary>
|
|
/// <param name="hrgn">The HRGN value.</param>
|
|
/// <returns>The Region instance.</returns>
|
|
public static Region ToRegion(this SafeHRGN hrgn) => ((HRGN)hrgn).ToRegion();
|
|
|
|
// TODO: Fix code below to process different bpp bitmaps w/o flipping
|
|
//{
|
|
// const Imaging.PixelFormat fmt = Imaging.PixelFormat.Format32bppArgb;
|
|
|
|
// // If hbmp is NULL handle, return null if (hbmp.IsNull) return null;
|
|
|
|
// // Get detail and bail if not 32bit, empty or an old style BMP var (bpp, width, height, scanBytes, bits, isdib) = GetInfo(hbmp);
|
|
// if (bpp != Image.GetPixelFormatSize(fmt) || height == 0 || !isdib) return Image.FromHbitmap((IntPtr)hbmp);
|
|
|
|
// // Create bitmap from detail and flip if upside-down var bmp = new Bitmap(width, height, scanBytes, fmt, bits); if (height < 0)
|
|
// bmp.RotateFlip(RotateFlipType.Rotate180FlipNone); return bmp;
|
|
|
|
// static (ushort bpp, int width, int height, int scanBytes, IntPtr bits, bool isdib) GetInfo(in HBITMAP hbmp) { var dibSz =
|
|
// Marshal.SizeOf(typeof(DIBSECTION)); using var mem = GetObject(hbmp, dibSz); if (mem.Size == dibSz) { var dib =
|
|
// mem.ToStructure<DIBSECTION>(); return (dib.dsBm.bmBitsPixel, dib.dsBmih.biWidth, dib.dsBmih.biHeight, dib.dsBm.bmWidthBytes,
|
|
// dib.dsBm.bmBits, true); } else { var bmp = mem.ToStructure<BITMAP>(); return (bmp.bmBitsPixel, bmp.bmWidth, bmp.bmHeight,
|
|
// bmp.bmWidthBytes, bmp.bmBits, false); } }
|
|
|
|
//}
|
|
|
|
#if WPF && !NETSTANDARD2_0
|
|
/// <summary>
|
|
/// Creates a <see cref="System.Windows.Media.Imaging.BitmapSource"/> from an <see cref="HBITMAP"/> preserving transparency, if possible.
|
|
/// </summary>
|
|
/// <param name="hbmp">The HBITMAP value.</param>
|
|
/// <returns>The BitmapSource instance. If <paramref name="hbmp"/> is a <c>NULL</c> handle, <see langword="null"/> is returned.</returns>
|
|
public static System.Windows.Media.Imaging.BitmapSource ToBitmapSource(this in HBITMAP hbmp)
|
|
{
|
|
// If hbmp is NULL handle, return null
|
|
if (hbmp.IsNull) return null;
|
|
try
|
|
{
|
|
return System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap((IntPtr)hbmp, IntPtr.Zero,
|
|
System.Windows.Int32Rect.Empty, System.Windows.Media.Imaging.BitmapSizeOptions.FromEmptyOptions());
|
|
}
|
|
catch (System.ComponentModel.Win32Exception)
|
|
{
|
|
return null;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Creates a <see cref="System.Windows.Media.Imaging.BitmapSource"/> from an <see cref="SafeHBITMAP"/> preserving transparency, if possible.
|
|
/// </summary>
|
|
/// <param name="hbmp">The SafeHBITMAP value.</param>
|
|
/// <returns>The BitmapSource instance. If <paramref name="hbmp"/> is a <c>NULL</c> handle, <see langword="null"/> is returned.</returns>
|
|
public static System.Windows.Media.Imaging.BitmapSource ToBitmapSource(this SafeHBITMAP hbmp) => ((HBITMAP)hbmp).ToBitmapSource();
|
|
#endif
|
|
|
|
private class NativeBrush : Brush
|
|
{
|
|
public NativeBrush(HBRUSH hBrush)
|
|
{
|
|
LOGBRUSH lb = GetObject<LOGBRUSH>(hBrush);
|
|
using SafeHBRUSH b2 = CreateBrushIndirect(lb);
|
|
SetNativeBrush(b2.DangerousGetHandle());
|
|
b2.SetHandleAsInvalid();
|
|
}
|
|
|
|
public override object Clone() => this;
|
|
}
|
|
}
|
|
|
|
/// <summary>A self-releasing pattern for IDeviceContext.GetHdc and ReleaseHdc.</summary>
|
|
/// <seealso cref="System.IDisposable"/>
|
|
public class SafeTempHDC : IDisposable, IGraphicsObjectHandle
|
|
{
|
|
private readonly IDeviceContext dc;
|
|
private readonly IntPtr hdc;
|
|
|
|
/// <summary>Initializes a new instance of the <see cref="SafeTempHDC"/> class with an <see cref="IDeviceContext"/>.</summary>
|
|
/// <param name="dc">The <see cref="IDeviceContext"/> instance.</param>
|
|
public SafeTempHDC(IDeviceContext dc)
|
|
{
|
|
this.dc = dc;
|
|
hdc = dc?.GetHdc() ?? default;
|
|
}
|
|
|
|
/// <summary>Gets a value indicating whether this instance has a NULL handle.</summary>
|
|
/// <value><see langword="true"/> if this has a NULL handle; otherwise, <see langword="false"/>.</value>
|
|
public bool IsNull => hdc == default;
|
|
|
|
/// <summary>Performs an implicit conversion from <see cref="SafeTempHDC"/> to <see cref="HDC"/>.</summary>
|
|
/// <param name="o">The <see cref="SafeTempHDC"/> instance.</param>
|
|
/// <returns>The result of the conversion.</returns>
|
|
public static implicit operator HDC(SafeTempHDC o) => o.hdc;
|
|
|
|
/// <inheritdoc/>
|
|
public IntPtr DangerousGetHandle() => hdc;
|
|
|
|
/// <summary>Releases claimed HDC.</summary>
|
|
public void Dispose() => dc?.ReleaseHdc();
|
|
}
|
|
} |