static WinGdiFont SetFont(RequestFont font)
{
WinGdiFont winFont = WinGdiFontSystem.GetWinGdiFont(font);
MyWin32.SelectObject(win32MemDc.DC, winFont.CachedHFont());
return(winFont);
}
internal static void MeasureCharWidths(IntPtr hFont,
out int[] charWidths,
out NativeTextWin32.FontABC[] abcSizes)
{
//only in ascii range
//current version
charWidths = new int[MAX_CODEPOINT_NO + 1]; //
MyWin32.SelectObject(win32MemDc.DC, hFont);
unsafe
{
//see: https://msdn.microsoft.com/en-us/library/ms404377(v=vs.110).aspx
//A code page contains 256 code points and is zero-based.
//In most code pages, code points 0 through 127 represent the ASCII character set,
//and code points 128 through 255 differ significantly between code pages
abcSizes = new NativeTextWin32.FontABC[MAX_CODEPOINT_NO + 1];
fixed(NativeTextWin32.FontABC *abc = abcSizes)
{
NativeTextWin32.GetCharABCWidths(win32MemDc.DC, (uint)0, (uint)MAX_CODEPOINT_NO, abc);
}
for (int i = 0; i < (MAX_CODEPOINT_NO + 1); ++i)
{
charWidths[i] = abcSizes[i].Sum;
}
}
}
public static void dbugDrawTextOrigin(IntPtr hdc, int x, int y)
{
MyWin32.Rectangle(hdc, x, y, x + 20, y + 20);
MyWin32.MoveToEx(hdc, x, y, 0);
MyWin32.LineTo(hdc, x + 20, y + 20);
MyWin32.MoveToEx(hdc, x, y + 20, 0);
MyWin32.LineTo(hdc, x + 20, y);
}
public NativeWin32MemoryDc(int w, int h, bool invertImage = false)
{
this._width = w;
this._height = h;
memHdc = MyWin32.CreateMemoryHdc(
IntPtr.Zero,
w,
invertImage ? -h : h, //***
out dib,
out ppvBits);
}
public void SetClipRect(int x, int y, int w, int h)
{
if (hRgn == IntPtr.Zero)
{
//create
hRgn = MyWin32.CreateRectRgn(0, 0, w, h);
}
MyWin32.SetRectRgn(hRgn,
x,
y,
x + w,
y + h);
MyWin32.SelectObject(memHdc, hRgn);
}
public NativeWin32MemoryDC(int w, int h, bool invertImage = false)
{
_width = w;
_height = h;
_invertedImage = invertImage;
_memHdc = MyWin32.CreateMemoryHdc(
IntPtr.Zero,
w,
invertImage ? -h : h, //***
out _dib,
out _ppvBits);
}
static IntPtr InitFont(string fontName, float emHeight, FontStyle style)
{
//see: MSDN, LOGFONT structure
//https://msdn.microsoft.com/en-us/library/windows/desktop/dd145037(v=vs.85).aspx
MyWin32.LOGFONT logFont = new MyWin32.LOGFONT();
MyWin32.SetFontName(ref logFont, fontName);
logFont.lfHeight = -(int)ConvEmSizeInPointsToPixels(emHeight); //minus **
logFont.lfCharSet = 1; //default
logFont.lfQuality = 0; //default
MyWin32.LOGFONT_FontWeight weight =
((style & FontStyle.Bold) == FontStyle.Bold) ?
MyWin32.LOGFONT_FontWeight.FW_BOLD :
MyWin32.LOGFONT_FontWeight.FW_REGULAR;
logFont.lfWeight = (int)weight;
//
logFont.lfItalic = (byte)(((style & FontStyle.Italic) == FontStyle.Italic) ? 1 : 0);
return(MyWin32.CreateFontIndirect(ref logFont));
}
public void Dispose()
{
if (isDisposed)
{
return;
}
if (hRgn != IntPtr.Zero)
{
MyWin32.DeleteObject(hRgn);
hRgn = IntPtr.Zero;
}
MyWin32.ReleaseMemoryHdc(memHdc, dib);
dib = IntPtr.Zero;
memHdc = IntPtr.Zero;
isDisposed = true;
}
public void Dispose()
{
if (_isDisposed)
{
return;
}
if (_hRgn != IntPtr.Zero)
{
MyWin32.DeleteObject(_hRgn);
_hRgn = IntPtr.Zero;
}
MyWin32.ReleaseMemoryHdc(_memHdc, _dib);
_dib = IntPtr.Zero;
_memHdc = IntPtr.Zero;
_isDisposed = true;
}
/// <summary>
/// Create a compatible memory HDC from the given HDC.<br/>
/// The memory HDC can be rendered into without effecting the original HDC.<br/>
/// The returned memory HDC and <paramref name="dib"/> must be released using <see cref="ReleaseMemoryHdc"/>.
/// </summary>
/// <param name="hdc">the HDC to create memory HDC from</param>
/// <param name="width">the width of the memory HDC to create</param>
/// <param name="height">the height of the memory HDC to create</param>
/// <param name="dib">returns used bitmap memory section that must be released when done with memory HDC</param>
/// <returns>memory HDC</returns>
public static IntPtr CreateMemoryHdc(IntPtr hdc, int width, int height, out IntPtr dib, out IntPtr ppvBits)
{
// Create a memory DC so we can work off-screen
IntPtr memoryHdc = MyWin32.CreateCompatibleDC(hdc);
MyWin32.SetBkMode(memoryHdc, 1);
// Create a device-independent bitmap and select it into our DC
var info = new Win32.BitMapInfo();
info.biSize = Marshal.SizeOf(info);
info.biWidth = width;
info.biHeight = -height;
info.biPlanes = 1;
info.biBitCount = 32;
info.biCompression = 0; // BI_RGB
dib = MyWin32.CreateDIBSection(hdc, ref info, 0, out ppvBits, IntPtr.Zero, 0);
MyWin32.SelectObject(memoryHdc, dib);
return(memoryHdc);
}
public static Win32Font CreateWin32Font(string fontName, float emHeight, bool bold, bool italic, float pixels_per_inch = 96)
{
//see: MSDN, LOGFONT structure
//https://msdn.microsoft.com/en-us/library/windows/desktop/dd145037(v=vs.85).aspx
MyWin32.LOGFONT logFont = new MyWin32.LOGFONT();
MyWin32.SetFontName(ref logFont, fontName);
logFont.lfHeight = -(int)MyWin32.ConvEmSizeInPointsToPixels(emHeight, pixels_per_inch); //minus **
logFont.lfCharSet = 1; //default
logFont.lfQuality = 0; //default
//
MyWin32.LOGFONT_FontWeight weight =
bold ?
MyWin32.LOGFONT_FontWeight.FW_BOLD :
MyWin32.LOGFONT_FontWeight.FW_REGULAR;
logFont.lfWeight = (int)weight;
//
logFont.lfItalic = (byte)(italic ? 1 : 0);
return(new Win32Font(MyWin32.CreateFontIndirect(ref logFont)));
}
public static extern bool FrameRect(IntPtr hDC, ref MyWin32.Win32Rect rect, IntPtr hBrush);
public static unsafe extern bool GetViewportOrgEx(IntPtr hdc, MyWin32.POINT* p);
/// <summary>
/// set( solid) text color
/// </summary>
/// <param name="r">0-255</param>
/// <param name="g">0-255</param>
/// <param name="b">0-255</param>
public void SetTextColor(byte r, byte g, byte b)
{
//convert to win32 (BGR) color
MyWin32.SetTextColor(_memHdc, (b << 16) | (g << 8) | r);
}
/// <summary>
/// Release the given memory HDC and dib section created from <see cref="CreateMemoryHdc"/>.
/// </summary>
/// <param name="memoryHdc">Memory HDC to release</param>
/// <param name="dib">bitmap section to release</param>
public static void ReleaseMemoryHdc(IntPtr memoryHdc, IntPtr dib)
{
MyWin32.DeleteObject(dib);
MyWin32.DeleteDC(memoryHdc);
}
/// <summary>
/// set solid text color
/// </summary>
/// <param name="r">0-255</param>
/// <param name="g">0-255</param>
/// <param name="b">0-255</param>
public void SetSolidTextColor(byte r, byte g, byte b)
{
//convert to win32 colorv
MyWin32.SetTextColor(memHdc, (b & 0xFF) << 16 | (g & 0xFF) << 8 | r);
}
public IntPtr SetFont(IntPtr hFont)
{
return(MyWin32.SelectObject(memHdc, hFont));
}
public void SetBackTransparent(bool value)
{
//public const int _SetBkMode_TRANSPARENT = 1;
//public const int _SetBkMode_OPAQUE = 2;
MyWin32.SetBkMode(memHdc, value ? 1 : 2);
}
public void PatBlt(PatBltColor color, int x, int y, int w, int h)
{
MyWin32.PatBlt(memHdc, x, y, w, h, (int)color);
}
public void PatBlt(PatBltColor color)
{
MyWin32.PatBlt(memHdc, 0, 0, _width, _height, (int)color);
}
public void ClearClipRect()
{
MyWin32.SelectClipRgn(memHdc, IntPtr.Zero);
}
