truetypefontcache.cpp

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/*
 * This file is part of OpenTTD.
 * 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.
 * 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.
 * 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 <https://www.gnu.org/licenses/old-licenses/gpl-2.0>.
 */

 
#include "../stdafx.h"
#include "../debug.h"
#include "../fontcache.h"
#include "../core/bitmath_func.hpp"
#include "../gfx_layout.h"
#include "truetypefontcache.h"
 
#include "../safeguards.h"

TrueTypeFontCache::TrueTypeFontCache(FontSize fs, int pixels) : FontCache(fs), req_size(pixels)
{
}

TrueTypeFontCache::~TrueTypeFontCache()
{
  /* Virtual functions get called statically in destructors, so make it explicit to remove any confusion. */
  this->TrueTypeFontCache::ClearFontCache();
}

void TrueTypeFontCache::ClearFontCache()
{
  this->glyph_to_sprite_map.clear();
  Layouter::ResetFontCache(this->fs);
}
 
 
TrueTypeFontCache::GlyphEntry *TrueTypeFontCache::GetGlyphPtr(GlyphID key)
{
  auto found = this->glyph_to_sprite_map.find(key);
  if (found == std::end(this->glyph_to_sprite_map)) return nullptr;
  return &found->second;
}
 
TrueTypeFontCache::GlyphEntry &TrueTypeFontCache::SetGlyphPtr(GlyphID key, GlyphEntry &&glyph)
{
  this->glyph_to_sprite_map[key] = std::move(glyph);
  return this->glyph_to_sprite_map[key];
}
 
bool TrueTypeFontCache::GetDrawGlyphShadow()
{
  return this->fs == FS_NORMAL && GetFontAAState();
}
 
uint TrueTypeFontCache::GetGlyphWidth(GlyphID key)
{
  if ((key & SPRITE_GLYPH) != 0) return this->parent->GetGlyphWidth(key);
 
  GlyphEntry *glyph = this->GetGlyphPtr(key);
  if (glyph == nullptr || glyph->data == nullptr) {
    this->GetGlyph(key);
    glyph = this->GetGlyphPtr(key);
  }
 
  return glyph->width;
}
 
const Sprite *TrueTypeFontCache::GetGlyph(GlyphID key)
{
  if ((key & SPRITE_GLYPH) != 0) return this->parent->GetGlyph(key);
 
  /* Check for the glyph in our cache */
  GlyphEntry *glyph = this->GetGlyphPtr(key);
  if (glyph != nullptr && glyph->data != nullptr) return glyph->GetSprite();
 
  return this->InternalGetGlyph(key, GetFontAAState());
}