Change: Separate fontcache implementations.

src/fontcache/truetypefontcache.cpp

@@ -0,0 +1,180 @@
+/*
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+/** @file truetypefontcache.cpp Common base implementation for font file based font caches. */
+
+#include "../stdafx.h"
+#include "../debug.h"
+#include "../fontcache.h"
+#include "../blitter/factory.hpp"
+#include "../core/bitmath_func.hpp"
+#include "../gfx_layout.h"
+#include "truetypefontcache.h"
+
+#include "../safeguards.h"
+
+/**
+ * Create a new TrueTypeFontCache.
+ * @param fs     The font size that is going to be cached.
+ * @param pixels The number of pixels this font should be high.
+ */
+TrueTypeFontCache::TrueTypeFontCache(FontSize fs, int pixels) : FontCache(fs), req_size(pixels), glyph_to_sprite(nullptr)
+{
+}
+
+/**
+ * Free everything that was allocated for this font cache.
+ */
+TrueTypeFontCache::~TrueTypeFontCache()
+{
+	/* Virtual functions get called statically in destructors, so make it explicit to remove any confusion. */
+	this->TrueTypeFontCache::ClearFontCache();
+
+	for (auto &iter : this->font_tables) {
+		free(iter.second.second);
+	}
+}
+
+/**
+ * Reset cached glyphs.
+ */
+void TrueTypeFontCache::ClearFontCache()
+{
+	if (this->glyph_to_sprite == nullptr) return;
+
+	for (int i = 0; i < 256; i++) {
+		if (this->glyph_to_sprite[i] == nullptr) continue;
+
+		for (int j = 0; j < 256; j++) {
+			if (this->glyph_to_sprite[i][j].duplicate) continue;
+			free(this->glyph_to_sprite[i][j].sprite);
+		}
+
+		free(this->glyph_to_sprite[i]);
+	}
+
+	free(this->glyph_to_sprite);
+	this->glyph_to_sprite = nullptr;
+
+	Layouter::ResetFontCache(this->fs);
+}
+
+
+TrueTypeFontCache::GlyphEntry *TrueTypeFontCache::GetGlyphPtr(GlyphID key)
+{
+	if (this->glyph_to_sprite == nullptr) return nullptr;
+	if (this->glyph_to_sprite[GB(key, 8, 8)] == nullptr) return nullptr;
+	return &this->glyph_to_sprite[GB(key, 8, 8)][GB(key, 0, 8)];
+}
+
+void TrueTypeFontCache::SetGlyphPtr(GlyphID key, const GlyphEntry *glyph, bool duplicate)
+{
+	if (this->glyph_to_sprite == nullptr) {
+		Debug(fontcache, 3, "Allocating root glyph cache for size {}", this->fs);
+		this->glyph_to_sprite = CallocT<GlyphEntry*>(256);
+	}
+
+	if (this->glyph_to_sprite[GB(key, 8, 8)] == nullptr) {
+		Debug(fontcache, 3, "Allocating glyph cache for range 0x{:02X}00, size {}", GB(key, 8, 8), this->fs);
+		this->glyph_to_sprite[GB(key, 8, 8)] = CallocT<GlyphEntry>(256);
+	}
+
+	Debug(fontcache, 4, "Set glyph for unicode character 0x{:04X}, size {}", key, this->fs);
+	this->glyph_to_sprite[GB(key, 8, 8)][GB(key, 0, 8)].sprite = glyph->sprite;
+	this->glyph_to_sprite[GB(key, 8, 8)][GB(key, 0, 8)].width = glyph->width;
+	this->glyph_to_sprite[GB(key, 8, 8)][GB(key, 0, 8)].duplicate = duplicate;
+}
+
+bool TrueTypeFontCache::GetDrawGlyphShadow()
+{
+	return this->fs == FS_NORMAL && GetFontAAState(FS_NORMAL);
+}
+
+uint TrueTypeFontCache::GetGlyphWidth(GlyphID key)
+{
+	if ((key & SPRITE_GLYPH) != 0) return this->parent->GetGlyphWidth(key);
+
+	GlyphEntry *glyph = this->GetGlyphPtr(key);
+	if (glyph == nullptr || glyph->sprite == 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->sprite != nullptr) return glyph->sprite;
+
+	if (key == 0) {
+		GlyphID question_glyph = this->MapCharToGlyph('?');
+		if (question_glyph == 0) {
+			/* The font misses the '?' character. Use built-in sprite.
+			 * Note: We cannot use the baseset as this also has to work in the bootstrap GUI. */
+#define CPSET { 0, 0, 0, 0, 1 }
+#define CP___ { 0, 0, 0, 0, 0 }
+			static SpriteLoader::CommonPixel builtin_questionmark_data[10 * 8] = {
+				CP___, CP___, CPSET, CPSET, CPSET, CPSET, CP___, CP___,
+				CP___, CPSET, CPSET, CP___, CP___, CPSET, CPSET, CP___,
+				CP___, CP___, CP___, CP___, CP___, CPSET, CPSET, CP___,
+				CP___, CP___, CP___, CP___, CPSET, CPSET, CP___, CP___,
+				CP___, CP___, CP___, CPSET, CPSET, CP___, CP___, CP___,
+				CP___, CP___, CP___, CPSET, CPSET, CP___, CP___, CP___,
+				CP___, CP___, CP___, CPSET, CPSET, CP___, CP___, CP___,
+				CP___, CP___, CP___, CP___, CP___, CP___, CP___, CP___,
+				CP___, CP___, CP___, CPSET, CPSET, CP___, CP___, CP___,
+				CP___, CP___, CP___, CPSET, CPSET, CP___, CP___, CP___,
+			};
+#undef CPSET
+#undef CP___
+			static const SpriteLoader::Sprite builtin_questionmark = {
+				10, // height
+				8,  // width
+				0,  // x_offs
+				0,  // y_offs
+				ST_FONT,
+				SCC_PAL,
+				builtin_questionmark_data
+			};
+
+			Sprite *spr = BlitterFactory::GetCurrentBlitter()->Encode(&builtin_questionmark, SimpleSpriteAlloc);
+			assert(spr != nullptr);
+			GlyphEntry new_glyph;
+			new_glyph.sprite = spr;
+			new_glyph.width  = spr->width + (this->fs != FS_NORMAL);
+			this->SetGlyphPtr(key, &new_glyph, false);
+			return new_glyph.sprite;
+		} else {
+			/* Use '?' for missing characters. */
+			this->GetGlyph(question_glyph);
+			glyph = this->GetGlyphPtr(question_glyph);
+			this->SetGlyphPtr(key, glyph, true);
+			return glyph->sprite;
+		}
+	}
+
+	return this->InternalGetGlyph(key, GetFontAAState(this->fs));
+}
+
+const void *TrueTypeFontCache::GetFontTable(uint32 tag, size_t &length)
+{
+	const FontTable::iterator iter = this->font_tables.Find(tag);
+	if (iter != this->font_tables.data() + this->font_tables.size()) {
+		length = iter->second.first;
+		return iter->second.second;
+	}
+
+	const void *result = this->InternalGetFontTable(tag, length);
+
+	this->font_tables.Insert(tag, std::pair<size_t, const void *>(length, result));
+	return result;
+}