FontSet.cpp

   1 #include "FontSet.h"
   2 #include <stdexcept>
   3 #include <stdio.h>
   4
   5
   6 FontSet::FontSet(
   7         std::string spec,
   8         Display* display_in,  int screen,
   9         double font_size_override, bool skip_italics)
  10         : display(display_in)
  11 {
  12         FcResult result;
  13
  14         // Regular.
  15         FcPattern* pattern = FcNameParse((const FcChar8*) spec.c_str());
  16         if (font_size_override > 0) {
  17                 FcPatternDel(pattern, FC_PIXEL_SIZE);
  18                 FcPatternDel(pattern, FC_SIZE);
  19                 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, font_size_override);
  20                 }
  21         XftDefaultSubstitute(display, screen, pattern);
  22         FcPattern* match = XftFontMatch(display, screen, pattern, &result);
  23 #ifdef SHOW_REAL_FONT
  24         FcChar8* format_name = FcPatternFormat(match, (FcChar8*) "%{=fcmatch} size: %{size} pixelsize: %{pixelsize}");
  25         printf("Real font: \"%s\".\n", format_name);
  26         free(format_name);
  27 #endif
  28         xft_fonts[0] = XftFontOpenPattern(display, match);
  29         if (xft_fonts[0] == nullptr)
  30                 throw std::runtime_error("Couldn't open the font.");
  31
  32         // Get the font size used.
  33         used_font_size = 0;
  34         result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &used_font_size);
  35
  36         // Italics.
  37         if (skip_italics) {
  38                 xft_fonts[2] = xft_fonts[0];
  39                 // We'll make bold-italic be the same as bold, below.
  40                 }
  41         else {
  42                 // Italic.
  43                 // (We do this first because we'll be clobbering the weight later.)
  44                 FcPatternDel(pattern, FC_SLANT);
  45                 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
  46                 match = XftFontMatch(display, screen, pattern, &result);
  47                 xft_fonts[2] = XftFontOpenPattern(display, match);
  48                 if (xft_fonts[2] == nullptr) {
  49                         fprintf(stderr, "Couldn't open italic font.");
  50                         xft_fonts[2] = xft_fonts[0];
  51                         }
  52
  53                 // Bold italic.
  54                 FcPatternDel(pattern, FC_WEIGHT);
  55                 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
  56                 match = XftFontMatch(display, screen, pattern, &result);
  57                 xft_fonts[3] = XftFontOpenPattern(display, match);
  58                 if (xft_fonts[3] == nullptr) {
  59                         fprintf(stderr, "Couldn't open bold italic font.");
  60                         xft_fonts[3] = xft_fonts[0];
  61                         }
  62                 }
  63
  64         // Bold.
  65         if (skip_italics) {
  66                 FcPatternDel(pattern, FC_WEIGHT);
  67                 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
  68                 }
  69         else {
  70                 FcPatternDel(pattern, FC_SLANT);
  71                 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
  72                 }
  73         match = XftFontMatch(display, screen, pattern, &result);
  74         xft_fonts[1] = XftFontOpenPattern(display, match);
  75         if (xft_fonts[1] == nullptr) {
  76                 fprintf(stderr, "Couldn't open bold font.");
  77                 xft_fonts[1] = xft_fonts[0];
  78                 }
  79         if (skip_italics)
  80                 xft_fonts[3] = xft_fonts[1];
  81
  82         FcPatternDestroy(pattern);
  83 }
  84
  85
  86 FontSet::~FontSet()
  87 {
  88         for (int i = 3; i >= 0; --i) {
  89                 bool is_copy = false;
  90                 for (int j = i - 1; j >= 0; --j) {
  91                         if (xft_fonts[i] == xft_fonts[j]) {
  92                                 is_copy = true;
  93                                 break;
  94                                 }
  95                         }
  96                 if (!is_copy)
  97                         XftFontClose(display, xft_fonts[i]);
  98                 xft_fonts[i] = nullptr;
  99                 }
 100 }
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