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181 lines
5.9 KiB
C++
181 lines
5.9 KiB
C++
/*
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* This file is part of OpenTTD.
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* 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.
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* 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.
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* 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/>.
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*/
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/** @file truetypefontcache.cpp Common base implementation for font file based font caches. */
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#include "../stdafx.h"
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#include "../debug.h"
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#include "../fontcache.h"
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#include "../blitter/factory.hpp"
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#include "../core/bitmath_func.hpp"
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#include "../gfx_layout.h"
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#include "truetypefontcache.h"
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#include "../safeguards.h"
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/**
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* Create a new TrueTypeFontCache.
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* @param fs The font size that is going to be cached.
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* @param pixels The number of pixels this font should be high.
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*/
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TrueTypeFontCache::TrueTypeFontCache(FontSize fs, int pixels) : FontCache(fs), req_size(pixels), glyph_to_sprite(nullptr)
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{
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}
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/**
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* Free everything that was allocated for this font cache.
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*/
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TrueTypeFontCache::~TrueTypeFontCache()
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{
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/* Virtual functions get called statically in destructors, so make it explicit to remove any confusion. */
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this->TrueTypeFontCache::ClearFontCache();
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for (auto &iter : this->font_tables) {
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free(iter.second.second);
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}
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}
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/**
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* Reset cached glyphs.
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*/
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void TrueTypeFontCache::ClearFontCache()
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{
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if (this->glyph_to_sprite == nullptr) return;
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for (int i = 0; i < 256; i++) {
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if (this->glyph_to_sprite[i] == nullptr) continue;
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for (int j = 0; j < 256; j++) {
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if (this->glyph_to_sprite[i][j].duplicate) continue;
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free(this->glyph_to_sprite[i][j].sprite);
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}
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free(this->glyph_to_sprite[i]);
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}
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free(this->glyph_to_sprite);
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this->glyph_to_sprite = nullptr;
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Layouter::ResetFontCache(this->fs);
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}
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TrueTypeFontCache::GlyphEntry *TrueTypeFontCache::GetGlyphPtr(GlyphID key)
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{
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if (this->glyph_to_sprite == nullptr) return nullptr;
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if (this->glyph_to_sprite[GB(key, 8, 8)] == nullptr) return nullptr;
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return &this->glyph_to_sprite[GB(key, 8, 8)][GB(key, 0, 8)];
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}
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void TrueTypeFontCache::SetGlyphPtr(GlyphID key, const GlyphEntry *glyph, bool duplicate)
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{
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if (this->glyph_to_sprite == nullptr) {
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DEBUG(fontcache, 3, "Allocating root glyph cache for size %u", this->fs);
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this->glyph_to_sprite = CallocT<GlyphEntry*>(256);
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}
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if (this->glyph_to_sprite[GB(key, 8, 8)] == nullptr) {
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DEBUG(fontcache, 3, "Allocating glyph cache for range 0x%02X00, size %u", GB(key, 8, 8), this->fs);
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this->glyph_to_sprite[GB(key, 8, 8)] = CallocT<GlyphEntry>(256);
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}
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DEBUG(fontcache, 4, "Set glyph for unicode character 0x%04X, size %u", key, this->fs);
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this->glyph_to_sprite[GB(key, 8, 8)][GB(key, 0, 8)].sprite = glyph->sprite;
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this->glyph_to_sprite[GB(key, 8, 8)][GB(key, 0, 8)].width = glyph->width;
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this->glyph_to_sprite[GB(key, 8, 8)][GB(key, 0, 8)].duplicate = duplicate;
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}
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bool TrueTypeFontCache::GetDrawGlyphShadow()
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{
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return this->fs == FS_NORMAL && GetFontAAState(FS_NORMAL);
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}
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uint TrueTypeFontCache::GetGlyphWidth(GlyphID key)
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{
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if ((key & SPRITE_GLYPH) != 0) return this->parent->GetGlyphWidth(key);
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GlyphEntry *glyph = this->GetGlyphPtr(key);
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if (glyph == nullptr || glyph->sprite == nullptr) {
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this->GetGlyph(key);
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glyph = this->GetGlyphPtr(key);
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}
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return glyph->width;
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}
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const Sprite *TrueTypeFontCache::GetGlyph(GlyphID key)
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{
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if ((key & SPRITE_GLYPH) != 0) return this->parent->GetGlyph(key);
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/* Check for the glyph in our cache */
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GlyphEntry *glyph = this->GetGlyphPtr(key);
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if (glyph != nullptr && glyph->sprite != nullptr) return glyph->sprite;
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if (key == 0) {
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GlyphID question_glyph = this->MapCharToGlyph('?');
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if (question_glyph == 0) {
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/* The font misses the '?' character. Use built-in sprite.
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* Note: We cannot use the baseset as this also has to work in the bootstrap GUI. */
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#define CPSET { 0, 0, 0, 0, 1 }
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#define CP___ { 0, 0, 0, 0, 0 }
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static SpriteLoader::CommonPixel builtin_questionmark_data[10 * 8] = {
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CP___, CP___, CPSET, CPSET, CPSET, CPSET, CP___, CP___,
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CP___, CPSET, CPSET, CP___, CP___, CPSET, CPSET, CP___,
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CP___, CP___, CP___, CP___, CP___, CPSET, CPSET, CP___,
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CP___, CP___, CP___, CP___, CPSET, CPSET, CP___, CP___,
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CP___, CP___, CP___, CPSET, CPSET, CP___, CP___, CP___,
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CP___, CP___, CP___, CPSET, CPSET, CP___, CP___, CP___,
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CP___, CP___, CP___, CPSET, CPSET, CP___, CP___, CP___,
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CP___, CP___, CP___, CP___, CP___, CP___, CP___, CP___,
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CP___, CP___, CP___, CPSET, CPSET, CP___, CP___, CP___,
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CP___, CP___, CP___, CPSET, CPSET, CP___, CP___, CP___,
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};
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#undef CPSET
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#undef CP___
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static const SpriteLoader::Sprite builtin_questionmark = {
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10, // height
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8, // width
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0, // x_offs
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0, // y_offs
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SpriteType::Font,
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SCC_PAL,
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builtin_questionmark_data
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};
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Sprite *spr = BlitterFactory::GetCurrentBlitter()->Encode(&builtin_questionmark, SimpleSpriteAlloc);
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assert(spr != nullptr);
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GlyphEntry new_glyph;
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new_glyph.sprite = spr;
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new_glyph.width = spr->width + (this->fs != FS_NORMAL);
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this->SetGlyphPtr(key, &new_glyph, false);
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return new_glyph.sprite;
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} else {
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/* Use '?' for missing characters. */
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this->GetGlyph(question_glyph);
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glyph = this->GetGlyphPtr(question_glyph);
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this->SetGlyphPtr(key, glyph, true);
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return glyph->sprite;
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}
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}
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return this->InternalGetGlyph(key, GetFontAAState(this->fs));
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}
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const void *TrueTypeFontCache::GetFontTable(uint32 tag, size_t &length)
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{
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const FontTable::iterator iter = this->font_tables.Find(tag);
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if (iter != this->font_tables.data() + this->font_tables.size()) {
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length = iter->second.first;
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return iter->second.second;
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}
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const void *result = this->InternalGetFontTable(tag, length);
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this->font_tables.Insert(tag, std::pair<size_t, const void *>(length, result));
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return result;
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}
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