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128 lines
4.0 KiB
C++
128 lines
4.0 KiB
C++
/*
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* CBitmapHanFont.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 "CBitmapHanFont.h"
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#include "CBitmapFont.h"
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#include "SDL_Extensions.h"
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#include "../../lib/filesystem/Filesystem.h"
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#include "../../lib/json/JsonNode.h"
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#include "../../lib/TextOperations.h"
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#include "../../lib/Rect.h"
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#include <SDL_surface.h>
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size_t CBitmapHanFont::getCharacterDataOffset(size_t index) const
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{
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size_t rowSize = (size + 7) / 8; // 1 bit per pixel, rounded up
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size_t charSize = rowSize * size; // glyph contains "size" rows
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return index * charSize;
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}
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size_t CBitmapHanFont::getCharacterIndex(ui8 first, ui8 second) const
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{
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if (second > 0x7f )
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second--;
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return (first - 0x81) * (12*16 - 2) + (second - 0x40);
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}
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void CBitmapHanFont::renderCharacter(SDL_Surface * surface, int characterIndex, const ColorRGBA & color, int &posX, int &posY) const
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{
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//TODO: somewhat duplicated with CBitmapFont::renderCharacter();
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Rect clipRect;
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CSDL_Ext::getClipRect(surface, clipRect);
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CSDL_Ext::TColorPutter colorPutter = CSDL_Ext::getPutterFor(surface, 0);
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uint8_t 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)size, clipRect.y + clipRect.h - posY);
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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>((int)size, clipRect.x + clipRect.w - posX);
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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_t *dstLine = (uint8_t*)surface->pixels;
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uint8_t *source = data.first.get() + getCharacterDataOffset(characterIndex);
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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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source += ((size + 7) / 8) * dy;
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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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// select current bit in bitmap
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int bit = (source[dx / 8] << (dx % 8)) & 0x80;
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uint8_t* dstPixel = dstLine + dx*bpp;
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if (bit != 0)
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colorPutter(dstPixel, color.r, color.g, color.b);
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}
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}
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posX += (int)size + 1;
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}
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void CBitmapHanFont::renderText(SDL_Surface * surface, const std::string & data, const ColorRGBA & color, const Point & pos) const
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{
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int posX = pos.x;
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int posY = pos.y;
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SDL_LockSurface(surface);
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for(size_t i=0; i<data.size(); i += TextOperations::getUnicodeCharacterSize(data[i]))
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{
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std::string localChar = TextOperations::fromUnicode(data.substr(i, TextOperations::getUnicodeCharacterSize(data[i])), "GBK");
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if (localChar.size() == 1)
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fallback->renderCharacter(surface, fallback->chars[ui8(localChar[0])], color, posX, posY);
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if (localChar.size() == 2)
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renderCharacter(surface, (int)getCharacterIndex(localChar[0], localChar[1]), color, posX, posY);
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}
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SDL_UnlockSurface(surface);
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}
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CBitmapHanFont::CBitmapHanFont(const JsonNode &config):
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fallback(new CBitmapFont(config["fallback"].String())),
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data(CResourceHandler::get()->load(ResourcePath("data/" + config["name"].String(), EResType::OTHER))->readAll()),
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size((size_t)config["size"].Float())
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{
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// basic tests to make sure that fonts are OK
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// 1) fonts must contain 190 "sections", 126 symbols each.
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assert(getCharacterIndex(0xfe, 0xff) == 190*126);
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// 2) ensure that font size is correct - enough to fit all possible symbols
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assert(getCharacterDataOffset(getCharacterIndex(0xfe, 0xff)) == data.second);
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}
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size_t CBitmapHanFont::getLineHeight() const
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{
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return std::max(size + 1, fallback->getLineHeight());
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}
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size_t CBitmapHanFont::getGlyphWidth(const char * data) const
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{
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std::string localChar = TextOperations::fromUnicode(std::string(data, TextOperations::getUnicodeCharacterSize(data[0])), "GBK");
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if (localChar.size() == 1)
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return fallback->getGlyphWidth(data);
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if (localChar.size() == 2)
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return size + 1;
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return 0;
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}
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