rostests/tests/primitives/mk_font.cpp

   1
   2 // ------------------------------------------------------------------
   3 // Windows 2000 Graphics API Black Book
   4 // Chapter 4 - Utility functions
   5 //
   6 // Created by Damon Chandler <dmc27@ee.cornell.edu>
   7 // Updates can be downloaded at: <www.coriolis.com>
   8 //
   9 // Please do not hesistate to e-mail me at dmc27@ee.cornell.edu
  10 // if you have any questions about this code.
  11 // ------------------------------------------------------------------
  12
  13 //>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
  14 #include <windows.h>
  15 #include <cassert>
  16
  17 #include "mk_font.h"
  18 //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
  19
  20 namespace font {
  21
  22 // creates a logical font
  23 HFONT MakeFont(
  24     IN HDC hDestDC,           // handle to target DC
  25     IN LPCSTR typeface_name,  // font's typeface name
  26     IN int point_size,        // font's point size
  27     IN const BYTE charset,    // font's character set
  28     IN const DWORD style      // font's styles
  29    )
  30 {
  31    //
  32    // NOTE: On Windows 9x/Me, GetWorldTransform is not
  33    // supported.  For compatibility with these platforms you
  34    // should initialize the XFORM::eM22 data member to 1.0.
  35    //
  36    XFORM xf = {0, 0, 0, 1.0, 0, 0};
  37    GetWorldTransform(hDestDC, &xf);
  38    int pixels_per_inch = GetDeviceCaps(hDestDC, LOGPIXELSY);
  39
  40    POINT PSize = {
  41       0,
  42       -MulDiv(static_cast<int>(xf.eM22 * point_size + 0.5),
  43               pixels_per_inch, 72)
  44       };
  45
  46    HFONT hResult = NULL;
  47    if (DPtoLP(hDestDC, &PSize, 1))
  48    {
  49       LOGFONT lf;
  50       memset(&lf, 0, sizeof(LOGFONT));
  51
  52       lf.lfHeight = PSize.y;
  53       lf.lfCharSet = charset;
  54       lstrcpyn(reinterpret_cast<LPTSTR>(&lf.lfFaceName),
  55                typeface_name, LF_FACESIZE);
  56
  57       lf.lfWeight = (style & FS_BOLD) ? FW_BOLD : FW_DONTCARE;
  58       lf.lfItalic = (style & FS_ITALIC) ? true : false;
  59       lf.lfUnderline = (style & FS_UNDERLINE) ? true : false;
  60       lf.lfStrikeOut = (style & FS_STRIKEOUT) ? true : false;
  61
  62       // create the logical font
  63       hResult = CreateFontIndirect(&lf);
  64    }
  65    return hResult;
  66 }
  67 //-------------------------------------------------------------------------
  68
  69 } // namespace font