source/graphics/FontMetrics.h

   1 /* Copyright (C) 2021 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 #ifndef INCLUDED_FONTMETRICS
  19 #define INCLUDED_FONTMETRICS
  20
  21 class CFont;
  22 class CStrIntern;
  23
  24 /**
  25  * Helper class for measuring sizes of text.
  26  * This will load the font when necessary, and will return plausible values
  27  * if loading fails (since misrendering is better than crashing).
  28  */
  29 class CFontMetrics
  30 {
  31 public:
  32         CFontMetrics(CStrIntern font);
  33
  34         int GetLineSpacing() const;
  35         int GetHeight() const;
  36         int GetCharacterWidth(wchar_t c) const;
  37         void CalculateStringSize(const wchar_t* string, int& w, int& h) const;
  38
  39 private:
  40         std::shared_ptr<CFont> m_Font;
  41 };
  42
  43 #endif // INCLUDED_FONTMETRICS