src/mgl/fontmgr.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/mgl/fontmgr.cpp
   3 // Purpose:     font management for wxMGL
   4 // Author:      Vaclav Slavik
   5 // Created:     2006-11-18
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2001-2002 SciTech Software, Inc. (www.scitechsoft.com)
   8 //              (c) 2006 REA Elektronik GmbH
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16     #pragma hdrstop
  17 #endif
  18
  19 #ifndef WX_PRECOMP
  20     #include "wx/log.h"
  21 #endif
  22
  23 #include "wx/private/fontmgr.h"
  24 #include "wx/sysopt.h"
  25
  26 #include <mgraph.h>
  27
  28 static int gs_antialiasingThreshold = -1;
  29
  30 // ============================================================================
  31 // implementation
  32 // ============================================================================
  33
  34 // ----------------------------------------------------------------------------
  35 // wxFontInstance
  36 // ----------------------------------------------------------------------------
  37
  38 wxFontInstance::wxFontInstance(float ptSize, bool aa, font_lib_t *fontLib)
  39     : wxFontInstanceBase(ptSize, aa)
  40 {
  41     m_font = MGL_loadFontInstance(fontLib, ptSize, 0.0, 0.0, aa);
  42
  43     wxASSERT_MSG( m_font, _T("cannot create font instance") );
  44 }
  45
  46 wxFontInstance::~wxFontInstance()
  47 {
  48     if ( m_font )
  49         MGL_unloadFontInstance(m_font);
  50 }
  51
  52 // ----------------------------------------------------------------------------
  53 // wxFontFace
  54 // ----------------------------------------------------------------------------
  55
  56 void wxFontFace::Acquire()
  57 {
  58     wxFontFaceBase::Acquire();
  59
  60     if ( m_refCnt == 1 )
  61     {
  62         wxCHECK_RET( m_fontLib == NULL, _T("font lib already created") );
  63
  64         wxLogTrace("mgl_font", "opening library '%s'", m_fileName.mb_str());
  65         m_fontLib = MGL_openFontLib(m_fileName.fn_str());
  66     }
  67 }
  68
  69 void wxFontFace::Release()
  70 {
  71     wxFontFaceBase::Release();
  72
  73     if ( m_refCnt == 0 )
  74     {
  75         wxCHECK_RET( m_fontLib != NULL, _T("font lib not created") );
  76
  77         wxLogTrace("mgl_font", "closing library '%s'", m_fileName.mb_str());
  78         MGL_closeFontLib(m_fontLib);
  79         m_fontLib = NULL;
  80     }
  81 }
  82
  83 wxFontInstance *wxFontFace::GetFontInstance(float ptSize, bool aa)
  84 {
  85     if ( gs_antialiasingThreshold == -1 )
  86     {
  87         gs_antialiasingThreshold = 10;
  88 #if wxUSE_SYSTEM_OPTIONS
  89         if ( wxSystemOptions::HasOption(wxT("mgl.aa-threshold")) )
  90             gs_antialiasingThreshold =
  91                 wxSystemOptions::GetOptionInt(wxT("mgl.aa-threshold"));
  92         wxLogTrace("mgl_font", "AA threshold set to %i", gs_antialiasingThreshold);
  93 #endif
  94     }
  95
  96     // Small characters don't look good when antialiased with the algorithm
  97     // that FreeType uses (mere 2x2 supersampling), so lets disable AA
  98     // completely for small fonts. Bitmap fonts are not antialiased either.
  99     if ( ptSize <= gs_antialiasingThreshold ||
 100          m_fontLib->fontLibType == MGL_BITMAPFONT_LIB )
 101     {
 102         aa = false;
 103     }
 104
 105     return wxFontFaceBase::GetFontInstance(ptSize, aa);
 106 }
 107
 108 wxFontInstance *wxFontFace::CreateFontInstance(float ptSize, bool aa)
 109 {
 110     wxASSERT_MSG( m_fontLib, _T("font library not loaded!") );
 111
 112     return new wxFontInstance(ptSize, aa, m_fontLib);
 113 }
 114
 115 // ----------------------------------------------------------------------------
 116 // wxFontBundle
 117 // ----------------------------------------------------------------------------
 118
 119 wxFontBundle::wxFontBundle(const font_info_t *info)
 120     : m_fontInfo(info)
 121 {
 122     if ( info->regularFace[0] != '\0' )
 123         m_faces[FaceType_Regular] = new wxFontFace(info->regularFace);
 124
 125     if ( info->italicFace[0] != '\0' )
 126         m_faces[FaceType_Italic] = new wxFontFace(info->italicFace);
 127
 128     if ( info->boldFace[0] != '\0' )
 129         m_faces[FaceType_Bold] = new wxFontFace(info->boldFace);
 130
 131     if ( info->boldItalicFace[0] != '\0' )
 132         m_faces[FaceType_BoldItalic] = new wxFontFace(info->boldItalicFace);
 133
 134     wxLogTrace("mgl_font", "new family '%s' (r=%s, i=%s, b=%s, bi=%s)\n",
 135                info->familyName, info->regularFace, info->italicFace,
 136                info->boldFace, info->boldItalicFace);
 137 }
 138
 139 wxString wxFontBundle::GetName() const
 140 {
 141     return wxString::FromAscii(m_fontInfo->familyName);
 142 }
 143
 144 bool wxFontBundle::IsFixed() const
 145 {
 146     return m_fontInfo->isFixed;
 147 }
 148
 149
 150 // ----------------------------------------------------------------------------
 151 // wxFontsManager
 152 // ----------------------------------------------------------------------------
 153
 154 wxString wxFontsManager::GetDefaultFacename(wxFontFamily family) const
 155 {
 156     switch ( family )
 157     {
 158         case wxSCRIPT:
 159             return _T("Script");
 160         case wxDECORATIVE:
 161             return _T("Charter");
 162         case wxROMAN:
 163             return _T("Times");
 164         case wxTELETYPE:
 165         case wxMODERN:
 166             return _T("Courier");
 167         case wxSWISS:
 168         case wxDEFAULT:
 169         default:
 170             return wxT("Helvetica");
 171     }
 172 }
 173
 174 static ibool MGLAPI enum_callback(const font_info_t *info, void *cookie)
 175 {
 176     wxFontsManager *db = (wxFontsManager*)cookie;
 177     db->AddBundle(new wxFontBundle(info));
 178     return TRUE;
 179 }
 180
 181 void wxFontsManager::AddAllFonts()
 182 {
 183     MGL_enumerateFonts(enum_callback, (void*)this);
 184 }