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