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00001 // XftFontImp.cc  Xft font implementation for FbTk
00002 // Copyright (c) 2002 Henrik Kinnunen (fluxgen@linuxmail.org)
00003 // 
00004 // Permission is hereby granted, free of charge, to any person obtaining a
00005 // copy of this software and associated documentation files (the "Software"),
00006 // to deal in the Software without restriction, including without limitation
00007 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
00008 // and/or sell copies of the Software, and to permit persons to whom the
00009 // Software is furnished to do so, subject to the following conditions:
00010 //
00011 // The above copyright notice and this permission notice shall be included in
00012 // all copies or substantial portions of the Software.
00013 //
00014 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00015 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00016 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
00017 // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00018 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
00019 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
00020 // DEALINGS IN THE SOFTWARE.
00021 
00022 //$Id: XftFontImp.cc,v 1.2 2002/12/01 13:42:15 rathnor Exp $
00023 
00024 #include "XftFontImp.hh"
00025 #include "App.hh"
00026 
00027 #ifdef HAVE_CONFIG_H
00028 #include "config.h"
00029 #endif //HAVE_CONFIG_H
00030 namespace FbTk {
00031 
00032 XftFontImp::XftFontImp(const char *name, bool utf8):m_xftfont(0),
00033                                                     m_utf8mode(utf8) {
00034     if (name != 0)
00035         load(name);
00036 }
00037 
00038 XftFontImp::~XftFontImp() {
00039     if (m_xftfont != 0)
00040         XftFontClose(App::instance()->display(), m_xftfont);
00041 }
00042 
00043 bool XftFontImp::load(const std::string &name) {
00044     //Note: assumes screen 0 for now, changes on draw if needed
00045     
00046     Display *disp = App::instance()->display();
00047     XftFont *newxftfont = XftFontOpenName(disp, 0, name.c_str());
00048         
00049     if (newxftfont == 0) { // failed to open font, lets test with XLFD
00050         newxftfont = XftFontOpenXlfd(disp, 0, name.c_str());
00051         if (newxftfont == 0)
00052             return false;
00053     }
00054     // destroy old font and set new
00055     if (m_xftfont != 0)
00056         XftFontClose(disp, m_xftfont);
00057 
00058     m_xftfont = newxftfont;
00059 
00060     return true;
00061 }
00062 
00063 void XftFontImp::drawText(Drawable w, int screen, GC gc, const char *text, size_t len, int x, int y) const {
00064     if (m_xftfont == 0)
00065         return;
00066     Display *disp = App::instance()->display();
00067     XftDraw *draw = XftDrawCreate(disp,
00068                                   w,
00069                                   DefaultVisual(disp, screen),
00070                                   DefaultColormap(disp, screen));
00071 
00072     XGCValues gc_val;
00073 
00074     // get foreground pixel value and convert it to XRenderColor value
00075     // TODO: we should probably check return status
00076     XGetGCValues(disp, gc, GCForeground, &gc_val);
00077 
00078     // get red, green, blue values
00079     XColor xcol;
00080     xcol.pixel = gc_val.foreground;
00081     XQueryColor(disp, DefaultColormap(disp, screen), &xcol);
00082 
00083     // convert xcolor to XftColor
00084     XRenderColor rendcol;
00085     rendcol.red = xcol.red;
00086     rendcol.green = xcol.green;
00087     rendcol.blue = xcol.blue;
00088     rendcol.alpha = 0xFFFF;
00089     XftColor xftcolor;  
00090     XftColorAllocValue(disp, DefaultVisual(disp, screen), DefaultColormap(disp, screen),
00091                        &rendcol, &xftcolor);
00092 
00093     // draw string
00094 #ifdef HAVE_XFT_UTF8_STRING
00095     if (m_utf8mode) {
00096         XftDrawStringUtf8(draw,
00097                           &xftcolor,
00098                           m_xftfont,
00099                           x, y,
00100                           (XftChar8 *)(text), len);
00101     } else 
00102 #endif // HAVE_XFT_UTF8_STRING
00103     {
00104             XftDrawString8(draw,
00105                            &xftcolor,
00106                            m_xftfont,
00107                            x, y,
00108                            (XftChar8 *)(text), len);
00109     }
00110 
00111     XftColorFree(disp, DefaultVisual(disp, screen), 
00112                  DefaultColormap(disp, screen), &xftcolor);
00113     XftDrawDestroy(draw);
00114 }
00115 
00116 unsigned int XftFontImp::textWidth(const char * const text, unsigned int len) const {
00117     if (m_xftfont == 0)
00118         return 0;
00119     XGlyphInfo ginfo;
00120 #ifdef HAVE_XFT_UTF8_STRING
00121     if (m_utf8mode) {
00122         XftTextExtentsUtf8(App::instance()->display(),
00123                            m_xftfont,
00124                            (XftChar8 *)text, len,
00125                            &ginfo);
00126     } else 
00127 #endif  //HAVE_XFT_UTF8_STRING
00128     {
00129             XftTextExtents8(App::instance()->display(),
00130                             m_xftfont,
00131                             (XftChar8 *)text, len,
00132                             &ginfo);
00133     }
00134     return ginfo.xOff;
00135 }
00136 
00137 unsigned int XftFontImp::height() const {
00138     if (m_xftfont == 0)
00139         return 0;
00140     return m_xftfont->height;
00141 }
00142 
00143 }; // end namespace FbTk
XftFontImp.cc

Fluxbox CVS-Jan-2003
