private static void DrawTextOnGlass(IntPtr hDC, string text, Font font, Rectangle rct, int iGlowSize, StringAlignment horizontalAlign)
{
RECT rect = new RECT();
RECT pRect = new RECT();
rect.left = rct.Left;
rect.right = rct.Right + (4 * iGlowSize);
rect.top = rct.Top;
rect.bottom = rct.Bottom + (2 * iGlowSize);
pRect.left = 2 * iGlowSize;
pRect.top = 2;
pRect.right = rect.Width - (3 * iGlowSize);
pRect.bottom = rect.Height - 2;
TextFormatFlags dwFlags = TextFormatFlags.ModifyString | TextFormatFlags.NoPrefix | TextFormatFlags.SingleLine;
switch (horizontalAlign)
{
case StringAlignment.Near:
dwFlags |= TextFormatFlags.EndEllipsis;
break;
case StringAlignment.Center:
dwFlags |= TextFormatFlags.PathEllipsis | TextFormatFlags.HorizontalCenter;
break;
case StringAlignment.Far:
dwFlags |= TextFormatFlags.Right;
break;
}
IntPtr ptr = PInvoke.CreateCompatibleDC(hDC);
if (ptr != IntPtr.Zero)
{
IntPtr ptr5;
BITMAPINFO pbmi = new BITMAPINFO();
pbmi.bmiHeader.biSize = Marshal.SizeOf(typeof(BITMAPINFOHEADER));
pbmi.bmiHeader.biWidth = rect.Width;
pbmi.bmiHeader.biHeight = -rect.Height;
pbmi.bmiHeader.biPlanes = 1;
pbmi.bmiHeader.biBitCount = 0x20;
pbmi.bmiHeader.biCompression = 0;
IntPtr hgdiobj = PInvoke.CreateDIBSection(ptr, ref pbmi, 0, out ptr5, IntPtr.Zero, 0);
if (hgdiobj != IntPtr.Zero)
{
IntPtr ptr3 = PInvoke.SelectObject(ptr, hgdiobj);
IntPtr ptr6 = font.ToHfont();
IntPtr ptr4 = PInvoke.SelectObject(ptr, ptr6);
VisualStyleRenderer renderer = new VisualStyleRenderer(VisualStyleElement.Window.Caption.Active);
DTTOPTS pOptions = new DTTOPTS();
pOptions.dwSize = Marshal.SizeOf(typeof(DTTOPTS));
pOptions.dwFlags = 0x2800;
pOptions.iGlowSize = iGlowSize;
PInvoke.DrawThemeTextEx(renderer.Handle, ptr, 0, 0, text, -1, dwFlags, ref pRect, ref pOptions);
PInvoke.BitBlt(hDC, rect.left, rect.top, rect.Width, rect.Height, ptr, 0, 0, 0xcc0020);
PInvoke.SelectObject(ptr, ptr3);
PInvoke.SelectObject(ptr, ptr4);
PInvoke.DeleteObject(hgdiobj);
PInvoke.DeleteObject(ptr6);
}
PInvoke.DeleteDC(ptr);
}
}
private unsafe Bitmap GetCaptureBitmap(HWND hWnd)
{
Bitmap bitmap = null;
HWND zero = new HWND(0);
HDC desktopDC = new HDC(IntPtr.Zero);
HDC memoryDC = new HDC(IntPtr.Zero);
try
{
var result = PInvoke.GetClientRect(hWnd, out RECT rect);
if (!result)
{
throw new NullReferenceException($"指定したハンドルのウィンドウ({hWnd})を発見することができませんでした。");
}
POINT point = new POINT();
var mapResult = PInvoke.MapWindowPoints(hWnd, zero, &point, 2);
if (mapResult == 0)
{
throw new NullReferenceException($"指定したハンドルのウィンドウ({hWnd})の座標空間の変換に失敗しました。");
}
rect.left = point.x;
rect.top = point.y;
rect.right = rect.right + point.x;
rect.bottom = rect.bottom + point.y;
var tempRect = rect;
desktopDC = PInvoke.GetWindowDC(zero); // デスクトップの HDC を取得
var header = new BITMAPINFOHEADER()
{
biSize = (uint)Marshal.SizeOf(typeof(BITMAPINFOHEADER)),
biWidth = tempRect.right - rect.left,
biHeight = tempRect.bottom - rect.top,
biPlanes = 1,
biCompression = 0, // BitmapCompressionMode.BI_RGB = 0
biBitCount = 24,
};
var info = new BITMAPINFO
{
bmiHeader = header,
};
void **bits = null;
HBITMAP hBitmap = PInvoke.CreateDIBSection(desktopDC, &info, DIB_USAGE.DIB_RGB_COLORS, bits, new HANDLE(IntPtr.Zero), 0);
memoryDC = PInvoke.CreateCompatibleDC(desktopDC);
var phBitMap = PInvoke.SelectObject(memoryDC, new HGDIOBJ(hBitmap));
PInvoke.BitBlt(memoryDC, 0, 0, header.biWidth, header.biHeight, desktopDC, rect.left, rect.top, ROP_CODE.SRCCOPY);
PInvoke.SelectObject(memoryDC, phBitMap);
bitmap = Bitmap.FromHbitmap(hBitmap, IntPtr.Zero);
}
finally
{
if (desktopDC.Value != IntPtr.Zero)
{
PInvoke.ReleaseDC(zero, desktopDC);
}
if (memoryDC.Value != IntPtr.Zero)
{
PInvoke.ReleaseDC(hWnd, memoryDC);
}
}
return(bitmap);
}
