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// XftFontImp.cc Xft font implementation for FbTk
// Copyright (c) 2002 - 2006 Henrik Kinnunen (fluxgen at fluxbox dot org)
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
#include "XftFontImp.hh"
#include "App.hh"
#include "FbDrawable.hh"
#include <cmath>
#include <cstdio>
#include <algorithm>
namespace FbTk {
XftFontImp::XftFontImp(const char *name, bool utf8):
m_utf8mode(utf8), m_name(""), m_maxlength(0x8000) {
for (int r = ROT0; r <= ROT270; r++) {
m_xftfonts[r] = 0;
m_xftfonts_loaded[r] = false;
}
if (name != 0)
load(name);
}
XftFontImp::~XftFontImp() {
for (int r = ROT0; r <= ROT270; r++)
if (m_xftfonts[r] != 0)
XftFontClose(App::instance()->display(), m_xftfonts[r]);
}
bool XftFontImp::load(const std::string &name) {
//Note: assumes screen 0 for now, changes on draw if needed
Display *disp = App::instance()->display();
XftFont *newxftfont = XftFontOpenXlfd(disp, 0, name.c_str());
if (newxftfont == 0) {
newxftfont = XftFontOpenName(disp, 0, name.c_str());
if (newxftfont == 0)
return false;
}
// destroy all old fonts and set new
for (int r = ROT0; r <= ROT270; r++) {
m_xftfonts_loaded[r] = false;
if (m_xftfonts[r] != 0) {
XftFontClose(disp, m_xftfonts[r]);
m_xftfonts[r] = 0;
}
}
m_xftfonts[ROT0] = newxftfont;
m_xftfonts_loaded[ROT0] = true;
m_name = name;
// XGlyphInfo (used by XftFontImp::textWidth() / XftTextExtents8() etc)
// holds only type 'short' or 'unsigned short'. any text bigger than that
// yields either some negative or some 'wrapped' values ('integer
// overflow'). to prevent something like this we detect the maximium
// number of glyphs by calculating the amount of 'WW' (pretending a 'wide'
// glyph) fitting into 32k pixels
unsigned int tw = std::max<unsigned int>(textWidth("WW", 2), 1);
m_maxlength = 0x8000 / tw;
return true;
}
void XftFontImp::drawText(const FbDrawable &w, int screen, GC gc, const char* text, size_t len, int x, int y, FbTk::Orientation orient) {
if (!text || !*text)
return;
if (!validOrientation(orient))
return;
// we adjust y slightly so that the baseline is in the right spot
// (it is offset one by rotation >=180 degrees)
switch (orient) {
case ROT0:
break;
case ROT90:
break;
case ROT180:
x+=1;
y+=1;
break;
case ROT270:
y+=1;
break;
}
Visual* def_visual = DefaultVisual(w.display(), screen);
Colormap def_colmap = DefaultColormap(w.display(), screen);
XftFont *font = m_xftfonts[orient];
XftDraw *draw = XftDrawCreate(w.display(), w.drawable(), def_visual, def_colmap);
XGCValues gc_val;
// get foreground pixel value and convert it to XRenderColor value
// TODO: we should probably check return status
XGetGCValues(w.display(), gc, GCForeground, &gc_val);
// get red, green, blue values
XColor xcol;
xcol.pixel = gc_val.foreground;
XQueryColor(w.display(), def_colmap, &xcol);
// convert xcolor to XftColor
XRenderColor rendcol;
rendcol.red = xcol.red;
rendcol.green = xcol.green;
rendcol.blue = xcol.blue;
rendcol.alpha = 0xFFFF;
XftColor xftcolor;
XftColorAllocValue(w.display(), def_visual, def_colmap, &rendcol, &xftcolor);
// draw string
#ifdef HAVE_XFT_UTF8_STRING
if (m_utf8mode) {
// check the string size,
// if the size is zero we use the XftDrawString8 function instead.
XGlyphInfo ginfo;
XftTextExtentsUtf8(w.display(), m_xftfonts[ROT0], (XftChar8 *)text, len, &ginfo);
if (ginfo.xOff != 0) {
XftDrawStringUtf8(draw, &xftcolor, font, x, y, (XftChar8 *)text, len);
XftColorFree(w.display(), def_visual, def_colmap, &xftcolor);
XftDrawDestroy(draw);
return;
}
}
#endif // HAVE_XFT_UTF8_STRING
XftDrawString8(draw, &xftcolor, font, x, y, (XftChar8 *)text, len);
XftColorFree(w.display(), def_visual, def_colmap, &xftcolor);
XftDrawDestroy(draw);
}
unsigned int XftFontImp::textWidth(const char* text, unsigned int len) const {
if (m_xftfonts[ROT0] == 0)
return 0;
XGlyphInfo ginfo;
Display* disp = App::instance()->display();
XftFont *font = m_xftfonts[ROT0];
len = std::min(len, m_maxlength);
#ifdef HAVE_XFT_UTF8_STRING
if (m_utf8mode) {
XftTextExtentsUtf8(disp, font, (XftChar8 *)text, len, &ginfo);
if (ginfo.xOff != 0) {
return ginfo.xOff;
}
// the utf8 failed, try normal extents
}
#endif //HAVE_XFT_UTF8_STRING
std::string localestr = FbStringUtil::FbStrToLocale(FbString(text, len));
XftTextExtents8(disp,
font,
(XftChar8 *)localestr.data(), localestr.size(),
&ginfo);
return ginfo.xOff;
}
unsigned int XftFontImp::height() const {
if (m_xftfonts[ROT0] == 0)
return 0;
else
return m_xftfonts[ROT0]->height;
//m_xftfont->ascent + m_xftfont->descent;
// curiously, fonts seem to have a smaller height, but the "height"
// is specified within the actual font, so it must be right, right?
}
bool XftFontImp::validOrientation(FbTk::Orientation orient) {
if (orient == ROT0 || m_xftfonts[orient])
return true;
if (m_xftfonts_loaded[orient])
return false; // m_xftfonts is zero here
if (m_xftfonts[ROT0] == 0)
return false;
m_xftfonts_loaded[orient] = true;
// otherwise, try to load that orientation
// radians is actually anti-clockwise, so we reverse it
double radians = -(orient) * 90 * M_PI / 180;
XftMatrix matrix;
XftMatrixInit(&matrix);
XftMatrixRotate(&matrix, cos(radians), sin(radians));
Display *disp = App::instance()->display();
XftPattern * pattern = XftNameParse(m_name.c_str());
XftResult result;
pattern = XftFontMatch(disp, 0, pattern, &result);
XftPatternAddMatrix(pattern, XFT_MATRIX, &matrix);
XftFont * new_font = XftFontOpenPattern(disp, pattern);
if (new_font == 0)
return false;
m_xftfonts[orient] = new_font;
return true;
}
} // end namespace FbTk
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