Create(
string strFace,
int iSize,
int degrees,
IntPtr hdc)
{
int cyDevice_Res = GdiGraphics.GetDeviceCaps(hdc, CAPS.LOGPIXELSY);
// Calculate font height.
float flHeight = ((float)iSize * (float)cyDevice_Res) / 72.0F;
int iHeight = (int)(flHeight + 0.5);
// Set height negative to request "Em-Height" (versus
// "character-cell height" for positive size)
//iHeight = iHeight * (-1);
// Allocate managed code logfont structure
LOGFONT logfont = new LOGFONT();
logfont.lfHeight = iHeight;
logfont.lfWidth = 0;
logfont.lfEscapement = degrees * 10;
logfont.lfOrientation = 0;
logfont.lfWeight = 0;
logfont.lfItalic = 0;
logfont.lfUnderline = 0;
logfont.lfStrikeOut = 0;
logfont.lfCharSet = 0;
logfont.lfOutPrecision = 0;
logfont.lfClipPrecision = 0;
logfont.lfQuality = 0;
logfont.lfPitchAndFamily = 0;
// Allocate unmanaged code logfont structure.
int cbLogFont = Marshal.SizeOf(logfont);
int cbMem = cbLogFont + LF_FACESIZE;
IntPtr iptrLogFont = NativeHeap.LocalAlloc(NativeHeap.LPTR, cbMem);
if (iptrLogFont == IntPtr.Zero)
{
return(IntPtr.Zero);
}
// Copy managed structure to unmanaged buffer
Marshal.StructureToPtr(logfont, iptrLogFont, false);
// Set pointer to end of structure
IntPtr ipFaceDest = (IntPtr)((int)iptrLogFont + cbLogFont);
// Copy string to a character array.
char [] achFace = strFace.ToCharArray();
int cch = strFace.Length;
// Copy facename to unmanaged buffer
Marshal.Copy(achFace, 0, ipFaceDest, cch);
return(CreateFontIndirect(iptrLogFont));
}
Create(
string strFace,
int iSize,
int degrees)
{
// Calculate font height based on this ratio:
//
// Height in Pixels Desired Point Size
// ------------------- = ------------------
// Device Resolution 72
//
// (72 point = approx. 1 inch.)
//
// Which results in the following formula:
//
// Height = (Desired_Pt * Device_Res) / 72
//
IntPtr hdc = GdiGraphics.GetDC(IntPtr.Zero);
IntPtr hfont = Create(strFace, iSize, degrees, hdc);
GdiGraphics.ReleaseDC(IntPtr.Zero, hdc);
return(hfont);
}
Create(
IntPtr hdcDevice,
string strFace,
float sinSize,
int degrees)
{
// Calculate font height based on this ratio:
//
// Height in Pixels Desired Point Size
// ------------------- = ------------------
// Device Resolution 72
//
// (72 point = approx. 1 inch.)
//
// Which results in the following formula:
//
// Height = (Desired_Pt * Device_Res) / 72
//
IntPtr hfont = IntPtr.Zero;
float sinDevice_Res;
sinDevice_Res = (float)GdiGraphics.GetDeviceCaps(
hdcDevice, GdiGraphics.LOGPIXELSY);
// Calculate font height.
float flHeight = (sinSize * sinDevice_Res) / 72.0F;
int iHeight = (int)(flHeight + 0.5);
// Set height negative to request "Em-Height" (versus
// "character-cell height" for positive size)
iHeight = iHeight * (-1);
// Allocate managed code logfont structure
LOGFONT logfont = new LOGFONT();
logfont.lfHeight = iHeight;
logfont.lfWidth = 0;
logfont.lfEscapement = degrees * 10;
logfont.lfOrientation = 0;
logfont.lfWeight = 0;
logfont.lfItalic = 0;
logfont.lfUnderline = 0;
logfont.lfStrikeOut = 0;
logfont.lfCharSet = 0;
logfont.lfOutPrecision = 0;
logfont.lfClipPrecision = 0;
logfont.lfQuality = 0;
logfont.lfPitchAndFamily = 0;
// Allocate unmanaged code logfont structure.
int cbLogFont = Marshal.SizeOf(logfont);
int cbMem = cbLogFont + LF_FACESIZE;
IntPtr iptrLogFont = NativeHeap.LocalAlloc(
NativeHeap.LPTR, cbMem);
if (iptrLogFont == IntPtr.Zero)
{
return(IntPtr.Zero);
}
// Copy managed structure to unmanaged buffer
Marshal.StructureToPtr(logfont, iptrLogFont, false);
// Set pointer to end of structure
IntPtr iptrFaceDest = (IntPtr)((int)iptrLogFont +
cbLogFont);
// Copy string to a character array.
char [] achFace = strFace.ToCharArray();
int cch = strFace.Length;
if ((cch + 2) > LF_FACESIZE)
{
cch = LF_FACESIZE;
}
// Copy facename to unmanaged buffer
Marshal.Copy(achFace, 0, iptrFaceDest, cch);
hfont = CreateFontIndirect(iptrLogFont);
NativeHeap.LocalFree(iptrLogFont);
return(hfont);
}
