mirror of
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150 lines
4.1 KiB
C++
150 lines
4.1 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/CConfigHandler.h"
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#include "../../lib/json/JsonNode.h"
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#include "../../lib/filesystem/Filesystem.h"
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#include "../../lib/texts/TextOperations.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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int CTrueTypeFont::getPointSize(const JsonNode & config) const
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{
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float fontScale = settings["video"]["fontScalingFactor"].Float();
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int scalingFactor = getScalingFactor();
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if (config.isNumber())
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return std::round(config.Integer() * scalingFactor * fontScale);
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else
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return std::round(config[scalingFactor-1].Integer() * fontScale);
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}
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TTF_Font * CTrueTypeFont::loadFont(const JsonNode &config)
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{
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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(), data.second), 1, getPointSize(config["size"]));
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}
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int CTrueTypeFont::getFontStyle(const JsonNode &config) const
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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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blended(true),
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outline(fontConfig["outline"].Bool()),
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dropShadow(!fontConfig["noShadow"].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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TTF_SetFontHinting(font.get(),TTF_HINTING_MONO);
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logGlobal->debug("Loaded TTF font: '%s', point size %d, height %d, ascent %d, descent %d, line skip %d",
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fontConfig["file"].String(),
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getPointSize(fontConfig["size"]),
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TTF_FontHeight(font.get()),
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TTF_FontAscent(font.get()),
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TTF_FontDescent(font.get()),
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TTF_FontLineSkip(font.get())
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);
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}
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CTrueTypeFont::~CTrueTypeFont() = default;
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size_t CTrueTypeFont::getFontAscentScaled() const
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{
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return TTF_FontAscent(font.get());
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}
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size_t CTrueTypeFont::getLineHeightScaled() const
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{
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return TTF_FontHeight(font.get());
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}
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size_t CTrueTypeFont::getGlyphWidthScaled(const char *text) const
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{
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return getStringWidthScaled(std::string(text, TextOperations::getUnicodeCharacterSize(*text)));
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}
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bool CTrueTypeFont::canRepresentCharacter(const char * text) const
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{
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uint32_t codepoint = TextOperations::getUnicodeCodepoint(text, TextOperations::getUnicodeCharacterSize(*text));
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#if SDL_TTF_VERSION_ATLEAST(2, 0, 18)
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return TTF_GlyphIsProvided32(font.get(), codepoint);
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#elif SDL_TTF_VERSION_ATLEAST(2, 0, 12)
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if (codepoint <= 0xffff)
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return TTF_GlyphIsProvided(font.get(), codepoint);
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return true;
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#else
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return true;
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#endif
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}
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size_t CTrueTypeFont::getStringWidthScaled(const std::string & text) const
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{
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int width;
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TTF_SizeUTF8(font.get(), text.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 (color.r != 0 && color.g != 0 && color.b != 0) // not black - add shadow
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{
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if (outline)
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renderText(surface, data, Colors::BLACK, pos - Point(1,1) * getScalingFactor());
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if (dropShadow || outline)
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renderText(surface, data, Colors::BLACK, pos + Point(1,1) * getScalingFactor());
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}
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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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