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127 lines
3.4 KiB
C++
127 lines
3.4 KiB
C++
/*
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* CTrueTypeFont.cpp, part of VCMI engine
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*
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* Authors: listed in file AUTHORS in main folder
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*
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* License: GNU General Public License v2.0 or later
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* Full text of license available in license.txt file, in main folder
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*
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*/
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#include "StdInc.h"
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#include "CTrueTypeFont.h"
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#include "CBitmapFont.h"
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#include "../render/Colors.h"
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#include "../renderSDL/SDL_Extensions.h"
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#include "../../lib/JsonNode.h"
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#include "../../lib/TextOperations.h"
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#include "../../lib/filesystem/Filesystem.h"
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#include <SDL_ttf.h>
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std::pair<std::unique_ptr<ui8[]>, ui64> CTrueTypeFont::loadData(const JsonNode & config)
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{
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std::string filename = "Data/" + config["file"].String();
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return CResourceHandler::get()->load(ResourcePath(filename, EResType::TTF_FONT))->readAll();
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}
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TTF_Font * CTrueTypeFont::loadFont(const JsonNode &config)
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{
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int pointSize = static_cast<int>(config["size"].Float());
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if(!TTF_WasInit() && TTF_Init()==-1)
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throw std::runtime_error(std::string("Failed to initialize true type support: ") + TTF_GetError() + "\n");
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return TTF_OpenFontRW(SDL_RWFromConstMem(data.first.get(), (int)data.second), 1, pointSize);
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}
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int CTrueTypeFont::getFontStyle(const JsonNode &config)
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{
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const JsonVector & names = config["style"].Vector();
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int ret = 0;
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for(const JsonNode & node : names)
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{
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if (node.String() == "bold")
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ret |= TTF_STYLE_BOLD;
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else if (node.String() == "italic")
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ret |= TTF_STYLE_ITALIC;
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}
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return ret;
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}
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CTrueTypeFont::CTrueTypeFont(const JsonNode & fontConfig):
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data(loadData(fontConfig)),
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font(loadFont(fontConfig), TTF_CloseFont),
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dropShadow(fontConfig["blend"].Bool()),
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blended(fontConfig["blend"].Bool())
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{
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assert(font);
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TTF_SetFontStyle(font.get(), getFontStyle(fontConfig));
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std::string fallbackName = fontConfig["fallback"].String();
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if (!fallbackName.empty())
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fallbackFont = std::make_unique<CBitmapFont>(fallbackName);
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}
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CTrueTypeFont::~CTrueTypeFont() = default;
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size_t CTrueTypeFont::getLineHeight() const
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{
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if (fallbackFont)
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fallbackFont->getLineHeight();
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return TTF_FontHeight(font.get());
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}
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size_t CTrueTypeFont::getGlyphWidth(const char *data) const
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{
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if (fallbackFont && fallbackFont->canRepresentCharacter(data))
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return fallbackFont->getGlyphWidth(data);
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return getStringWidth(std::string(data, TextOperations::getUnicodeCharacterSize(*data)));
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int advance;
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TTF_GlyphMetrics(font.get(), *data, nullptr, nullptr, nullptr, nullptr, &advance);
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return advance;
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}
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size_t CTrueTypeFont::getStringWidth(const std::string & data) const
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{
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if (fallbackFont && fallbackFont->canRepresentString(data))
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return fallbackFont->getStringWidth(data);
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int width;
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TTF_SizeUTF8(font.get(), data.c_str(), &width, nullptr);
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return width;
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}
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void CTrueTypeFont::renderText(SDL_Surface * surface, const std::string & data, const ColorRGBA & color, const Point & pos) const
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{
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if (fallbackFont && fallbackFont->canRepresentString(data))
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{
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fallbackFont->renderText(surface, data, color, pos);
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return;
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}
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if (dropShadow && color.r != 0 && color.g != 0 && color.b != 0) // not black - add shadow
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renderText(surface, data, Colors::BLACK, pos + Point(1,1));
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if (!data.empty())
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{
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SDL_Surface * rendered;
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if (blended)
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rendered = TTF_RenderUTF8_Blended(font.get(), data.c_str(), CSDL_Ext::toSDL(color));
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else
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rendered = TTF_RenderUTF8_Solid(font.get(), data.c_str(), CSDL_Ext::toSDL(color));
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assert(rendered);
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CSDL_Ext::blitSurface(rendered, surface, pos);
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SDL_FreeSurface(rendered);
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}
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}
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