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275 lines
7.3 KiB
C++
275 lines
7.3 KiB
C++
#include "StdInc.h"
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#include "Fonts.h"
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#include <SDL_ttf.h>
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#include "SDL_Pixels.h"
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#include "../../lib/JsonNode.h"
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#include "../../lib/vcmi_endian.h"
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#include "../../lib/Filesystem/CResourceLoader.h"
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/*
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* Fonts.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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void IFont::renderTextLeft(SDL_Surface * surface, const std::string & data, const SDL_Color & color, const Point & pos) const
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{
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renderText(surface, data, color, pos);
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}
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void IFont::renderTextRight(SDL_Surface * surface, const std::string & data, const SDL_Color & color, const Point & pos) const
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{
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Point size(getStringWidth(data), getLineHeight());
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renderText(surface, data, color, pos - size);
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}
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void IFont::renderTextCenter(SDL_Surface * surface, const std::string & data, const SDL_Color & color, const Point & pos) const
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{
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Point size(getStringWidth(data), getLineHeight());
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renderText(surface, data, color, pos - size / 2);
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}
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void IFont::renderTextLinesLeft(SDL_Surface * surface, const std::vector<std::string> & data, const SDL_Color & color, const Point & pos) const
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{
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Point currPos = pos;
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BOOST_FOREACH(const std::string & line, data)
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{
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renderTextLeft(surface, line, color, currPos);
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currPos.y += getLineHeight();
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}
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}
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void IFont::renderTextLinesRight(SDL_Surface * surface, const std::vector<std::string> & data, const SDL_Color & color, const Point & pos) const
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{
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Point currPos = pos;
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currPos.y -= data.size() * getLineHeight();
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BOOST_FOREACH(const std::string & line, data)
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{
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renderTextRight(surface, line, color, currPos);
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currPos.y += getLineHeight();
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}
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}
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void IFont::renderTextLinesCenter(SDL_Surface * surface, const std::vector<std::string> & data, const SDL_Color & color, const Point & pos) const
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{
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Point currPos = pos;
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currPos.y -= data.size() * getLineHeight()/2;
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BOOST_FOREACH(const std::string & line, data)
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{
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renderTextCenter(surface, line, color, currPos);
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currPos.y += getLineHeight();
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}
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}
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std::array<CBitmapFont::Char, CBitmapFont::totalChars> CBitmapFont::loadChars() const
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{
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std::array<Char, totalChars> ret;
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size_t offset = 32;
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for (size_t i=0; i< ret.size(); i++)
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{
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ret[i].leftOffset = read_le_u32(data.first.get() + offset); offset+=4;
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ret[i].width = read_le_u32(data.first.get() + offset); offset+=4;
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ret[i].rightOffset = read_le_u32(data.first.get() + offset); offset+=4;
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}
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for (size_t i=0; i< ret.size(); i++)
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{
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int pixelOffset = read_le_u32(data.first.get() + offset); offset+=4;
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ret[i].pixels = data.first.get() + 4128 + pixelOffset;
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assert(pixelOffset + 4128 < data.second);
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}
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return ret;
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}
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CBitmapFont::CBitmapFont(const std::string & filename):
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data(CResourceHandler::get()->loadData(ResourceID("data/" + filename, EResType::BMP_FONT))),
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chars(loadChars()),
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height(data.first.get()[5])
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{}
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size_t CBitmapFont::getLineHeight() const
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{
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return height;
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}
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size_t CBitmapFont::getSymbolWidth(char data) const
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{
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const Char & ch = chars[ui8(data)];
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return ch.leftOffset + ch.width + ch.rightOffset;
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}
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size_t CBitmapFont::getStringWidth(const std::string & data) const
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{
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size_t width = 0;
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BOOST_FOREACH(auto & ch, data)
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{
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width += getSymbolWidth(ch);
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}
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return width;
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}
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void CBitmapFont::renderCharacter(SDL_Surface * surface, const Char & character, const SDL_Color & color, int &posX, int &posY) const
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{
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Rect clipRect;
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SDL_GetClipRect(surface, &clipRect);
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posX += character.leftOffset;
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TColorPutter colorPutter = CSDL_Ext::getPutterFor(surface, 0);
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Uint8 bpp = surface->format->BytesPerPixel;
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// start of line, may differ from 0 due to end of surface or clipped surface
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int lineBegin = std::max<int>(0, clipRect.y - posY);
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int lineEnd = std::min<int>(height, clipRect.y + clipRect.h - posY - 1);
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// start end end of each row, may differ from 0
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int rowBegin = std::max<int>(0, clipRect.x - posX);
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int rowEnd = std::min<int>(character.width, clipRect.x + clipRect.w - posX - 1);
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//for each line in symbol
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for(int dy = lineBegin; dy <lineEnd; dy++)
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{
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Uint8 *dstLine = (Uint8*)surface->pixels;
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Uint8 *srcLine = character.pixels;
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// shift source\destination pixels to current position
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dstLine += (posY+dy) * surface->pitch + posX * bpp;
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srcLine += dy * character.width;
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//for each column in line
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for(int dx = rowBegin; dx < rowEnd; dx++)
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{
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Uint8* dstPixel = dstLine + dx*bpp;
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switch(srcLine[dx])
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{
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case 1: //black "shadow"
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std::fill(dstPixel, dstPixel + bpp, 0);
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break;
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case 255: //text colour
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colorPutter(dstPixel, color.r, color.g, color.b);
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break;
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default :
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break; //transparency
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}
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}
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}
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posX += character.width;
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posX += character.rightOffset;
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}
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void CBitmapFont::renderText(SDL_Surface * surface, const std::string & data, const SDL_Color & color, const Point & pos) const
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{
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if (data.empty())
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return;
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assert(surface);
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int posX = pos.x;
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int posY = pos.y;
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// Safe to remove but I would like to trace all cases of this. Please report on Mantis or send note to me
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// Ivan
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assert(data[0] != '{');
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assert(data[data.size()-1] != '}');
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SDL_LockSurface(surface);
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// for each symbol
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for(size_t index = 0; index < data.size(); index++)
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{
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renderCharacter(surface, chars[ui8(data[index])], color, posX, posY);
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}
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SDL_UnlockSurface(surface);
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}
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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()->loadData(ResourceID(filename, EResType::TTF_FONT));
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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 = 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(), 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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BOOST_FOREACH(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(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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}
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size_t CTrueTypeFont::getLineHeight() 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::getSymbolWidth(char data) const
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{
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int advance;
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TTF_GlyphMetrics(font.get(), data, NULL, NULL, NULL, NULL, &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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int width;
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TTF_SizeText(font.get(), data.c_str(), &width, NULL);
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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 SDL_Color & color, const Point & pos) const
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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_RenderText_Solid(font.get(), data.c_str(), color);
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else
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rendered = TTF_RenderText_Blended(font.get(), data.c_str(), color);
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assert(rendered);
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Rect rect(pos.x, pos.y, rendered->w, rendered->h);
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SDL_BlitSurface(rendered, NULL, surface, &rect);
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SDL_FreeSurface(rendered);
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}
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}
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