src/fontcache/truetypefontcache.cpp

   1 /*
   2  * This file is part of OpenTTD.
   3  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
   4  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
   5  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
   6  */
   7
   8 /** @file truetypefontcache.cpp Common base implementation for font file based font caches. */
   9
  10 #include "../stdafx.h"
  11 #include "../debug.h"
  12 #include "../fontcache.h"
  13 #include "../core/bitmath_func.hpp"
  14 #include "../gfx_layout.h"
  15 #include "truetypefontcache.h"
  16
  17 #include "../safeguards.h"
  18
  19 /**
  20  * Create a new TrueTypeFontCache.
  21  * @param fs     The font size that is going to be cached.
  22  * @param pixels The number of pixels this font should be high.
  23  */
  24 TrueTypeFontCache::TrueTypeFontCache(FontSize fs, int pixels) : FontCache(fs), req_size(pixels)
  25 {
  26 }
  27
  28 /**
  29  * Free everything that was allocated for this font cache.
  30  */
  31 TrueTypeFontCache::~TrueTypeFontCache()
  32 {
  33         /* Virtual functions get called statically in destructors, so make it explicit to remove any confusion. */
  34         this->TrueTypeFontCache::ClearFontCache();
  35 }
  36
  37 /**
  38  * Reset cached glyphs.
  39  */
  40 void TrueTypeFontCache::ClearFontCache()
  41 {
  42         this->glyph_to_sprite_map.clear();
  43         Layouter::ResetFontCache(this->fs);
  44 }
  45
  46
  47 TrueTypeFontCache::GlyphEntry *TrueTypeFontCache::GetGlyphPtr(GlyphID key)
  48 {
  49         auto found = this->glyph_to_sprite_map.find(key);
  50         if (found == std::end(this->glyph_to_sprite_map)) return nullptr;
  51         return &found->second;
  52 }
  53
  54 TrueTypeFontCache::GlyphEntry &TrueTypeFontCache::SetGlyphPtr(GlyphID key, GlyphEntry &&glyph)
  55 {
  56         this->glyph_to_sprite_map[key] = std::move(glyph);
  57         return this->glyph_to_sprite_map[key];
  58 }
  59
  60 bool TrueTypeFontCache::GetDrawGlyphShadow()
  61 {
  62         return this->fs == FS_NORMAL && GetFontAAState();
  63 }
  64
  65 uint TrueTypeFontCache::GetGlyphWidth(GlyphID key)
  66 {
  67         if ((key & SPRITE_GLYPH) != 0) return this->parent->GetGlyphWidth(key);
  68
  69         GlyphEntry *glyph = this->GetGlyphPtr(key);
  70         if (glyph == nullptr || glyph->data == nullptr) {
  71                 this->GetGlyph(key);
  72                 glyph = this->GetGlyphPtr(key);
  73         }
  74
  75         return glyph->width;
  76 }
  77
  78 const Sprite *TrueTypeFontCache::GetGlyph(GlyphID key)
  79 {
  80         if ((key & SPRITE_GLYPH) != 0) return this->parent->GetGlyph(key);
  81
  82         /* Check for the glyph in our cache */
  83         GlyphEntry *glyph = this->GetGlyphPtr(key);
  84         if (glyph != nullptr && glyph->data != nullptr) return glyph->GetSprite();
  85
  86         return this->InternalGetGlyph(key, GetFontAAState());
  87 }