source/graphics/Font.cpp

   1 /* Copyright (C) 2022 Wildfire Games.
   2  * This file is part of 0 A.D.
   3  *
   4  * 0 A.D. is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * 0 A.D. is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include "precompiled.h"
  19 #include "Font.h"
  20
  21 #include "graphics/FontManager.h"
  22 #include "ps/Filesystem.h"
  23 #include "ps/CLogger.h"
  24 #include "renderer/Renderer.h"
  25
  26 #include <map>
  27 #include <string>
  28
  29 CFont::GlyphMap::GlyphMap()
  30 {
  31         memset(m_Data, 0, sizeof(m_Data));
  32 }
  33
  34 CFont::GlyphMap::~GlyphMap()
  35 {
  36         for (size_t i = 0; i < ARRAY_SIZE(m_Data); i++)
  37                 delete[] m_Data[i];
  38 }
  39
  40 void CFont::GlyphMap::set(u16 i, const GlyphData& val)
  41 {
  42         if (!m_Data[i >> 8])
  43                 m_Data[i >> 8] = new GlyphData[256]();
  44         m_Data[i >> 8][i & 0xff] = val;
  45         m_Data[i >> 8][i & 0xff].defined = 1;
  46 }
  47
  48 int CFont::GetCharacterWidth(wchar_t c) const
  49 {
  50         const GlyphData* g = m_Glyphs.get(c);
  51
  52         if (!g)
  53                 g = m_Glyphs.get(0xFFFD); // Use the missing glyph symbol
  54
  55         if (!g)
  56                 return 0;
  57
  58         return g->xadvance;
  59 }
  60
  61 void CFont::CalculateStringSize(const wchar_t* string, int& width, int& height) const
  62 {
  63         width = 0;
  64         height = m_Height;
  65
  66         // Compute the width as the width of the longest line.
  67         int lineWidth = 0;
  68         for (const wchar_t* c = string; *c != '\0'; c++)
  69         {
  70                 const GlyphData* g = m_Glyphs.get(*c);
  71
  72                 if (!g)
  73                         g = m_Glyphs.get(0xFFFD); // Use the missing glyph symbol
  74
  75                 if (g)
  76                         lineWidth += g->xadvance; // Add the character's advance distance
  77
  78                 if (*c == L'\n')
  79                 {
  80                         height += m_LineSpacing;
  81                         width = std::max(width, lineWidth);
  82                         lineWidth = 0;
  83                 }
  84         }
  85         width = std::max(width, lineWidth);
  86 }