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vcmi/client/gui/Fonts.cpp

397 lines
11 KiB
C++

/*
* Fonts.cpp, part of VCMI engine
*
* Authors: listed in file AUTHORS in main folder
*
* License: GNU General Public License v2.0 or later
* Full text of license available in license.txt file, in main folder
*
*/
#include "StdInc.h"
#include "Fonts.h"
#include <SDL_ttf.h>
#include "SDL_Pixels.h"
#include "../../lib/JsonNode.h"
#include "../../lib/vcmi_endian.h"
#include "../../lib/filesystem/Filesystem.h"
#include "../../lib/CGeneralTextHandler.h"
size_t IFont::getStringWidth(const std::string & data) const
{
size_t width = 0;
for(size_t i=0; i<data.size(); i += Unicode::getCharacterSize(data[i]))
{
width += getGlyphWidth(data.data() + i);
}
return width;
}
void IFont::renderTextLeft(SDL_Surface * surface, const std::string & data, const SDL_Color & color, const Point & pos) const
{
renderText(surface, data, color, pos);
}
void IFont::renderTextRight(SDL_Surface * surface, const std::string & data, const SDL_Color & color, const Point & pos) const
{
Point size((int)getStringWidth(data), (int)getLineHeight());
renderText(surface, data, color, pos - size);
}
void IFont::renderTextCenter(SDL_Surface * surface, const std::string & data, const SDL_Color & color, const Point & pos) const
{
Point size((int)getStringWidth(data), (int)getLineHeight());
renderText(surface, data, color, pos - size / 2);
}
void IFont::renderTextLinesLeft(SDL_Surface * surface, const std::vector<std::string> & data, const SDL_Color & color, const Point & pos) const
{
Point currPos = pos;
for(const std::string & line : data)
{
renderTextLeft(surface, line, color, currPos);
currPos.y += (int)getLineHeight();
}
}
void IFont::renderTextLinesRight(SDL_Surface * surface, const std::vector<std::string> & data, const SDL_Color & color, const Point & pos) const
{
Point currPos = pos;
currPos.y -= (int)data.size() * (int)getLineHeight();
for(const std::string & line : data)
{
renderTextRight(surface, line, color, currPos);
currPos.y += (int)getLineHeight();
}
}
void IFont::renderTextLinesCenter(SDL_Surface * surface, const std::vector<std::string> & data, const SDL_Color & color, const Point & pos) const
{
Point currPos = pos;
currPos.y -= (int)data.size() * (int)getLineHeight() / 2;
for(const std::string & line : data)
{
renderTextCenter(surface, line, color, currPos);
currPos.y += (int)getLineHeight();
}
}
std::array<CBitmapFont::BitmapChar, CBitmapFont::totalChars> CBitmapFont::loadChars() const
{
std::array<BitmapChar, totalChars> ret;
size_t offset = 32;
for (auto & elem : ret)
{
elem.leftOffset = read_le_u32(data.first.get() + offset); offset+=4;
elem.width = read_le_u32(data.first.get() + offset); offset+=4;
elem.rightOffset = read_le_u32(data.first.get() + offset); offset+=4;
}
for (auto & elem : ret)
{
int pixelOffset = read_le_u32(data.first.get() + offset); offset+=4;
elem.pixels = data.first.get() + 4128 + pixelOffset;
assert(pixelOffset + 4128 < data.second);
}
return ret;
}
CBitmapFont::CBitmapFont(const std::string & filename):
data(CResourceHandler::get()->load(ResourceID("data/" + filename, EResType::BMP_FONT))->readAll()),
chars(loadChars()),
height(data.first.get()[5])
{}
size_t CBitmapFont::getLineHeight() const
{
return height;
}
size_t CBitmapFont::getGlyphWidth(const char * data) const
{
std::string localChar = Unicode::fromUnicode(std::string(data, Unicode::getCharacterSize(data[0])));
if (localChar.size() == 1)
{
const BitmapChar & ch = chars[ui8(localChar[0])];
return ch.leftOffset + ch.width + ch.rightOffset;
}
return 0;
}
void CBitmapFont::renderCharacter(SDL_Surface * surface, const BitmapChar & character, const SDL_Color & color, int &posX, int &posY) const
{
Rect clipRect;
SDL_GetClipRect(surface, &clipRect);
posX += character.leftOffset;
TColorPutter colorPutter = CSDL_Ext::getPutterFor(surface, 0);
Uint8 bpp = surface->format->BytesPerPixel;
// start of line, may differ from 0 due to end of surface or clipped surface
int lineBegin = std::max<int>(0, clipRect.y - posY);
int lineEnd = std::min<int>(height, clipRect.y + clipRect.h - posY - 1);
// start end end of each row, may differ from 0
int rowBegin = std::max<int>(0, clipRect.x - posX);
int rowEnd = std::min<int>(character.width, clipRect.x + clipRect.w - posX - 1);
//for each line in symbol
for(int dy = lineBegin; dy <lineEnd; dy++)
{
Uint8 *dstLine = (Uint8*)surface->pixels;
Uint8 *srcLine = character.pixels;
// shift source\destination pixels to current position
dstLine += (posY+dy) * surface->pitch + posX * bpp;
srcLine += dy * character.width;
//for each column in line
for(int dx = rowBegin; dx < rowEnd; dx++)
{
Uint8* dstPixel = dstLine + dx*bpp;
switch(srcLine[dx])
{
case 1: //black "shadow"
colorPutter(dstPixel, 0, 0, 0);
break;
case 255: //text colour
colorPutter(dstPixel, color.r, color.g, color.b);
break;
default :
break; //transparency
}
}
}
posX += character.width;
posX += character.rightOffset;
}
void CBitmapFont::renderText(SDL_Surface * surface, const std::string & data, const SDL_Color & color, const Point & pos) const
{
if (data.empty())
return;
assert(surface);
int posX = pos.x;
int posY = pos.y;
// Should be used to detect incorrect text parsing. Disabled right now due to some old UI code (mostly pregame and battles)
//assert(data[0] != '{');
//assert(data[data.size()-1] != '}');
SDL_LockSurface(surface);
for(size_t i=0; i<data.size(); i += Unicode::getCharacterSize(data[i]))
{
std::string localChar = Unicode::fromUnicode(data.substr(i, Unicode::getCharacterSize(data[i])));
if (localChar.size() == 1)
renderCharacter(surface, chars[ui8(localChar[0])], color, posX, posY);
}
SDL_UnlockSurface(surface);
}
std::pair<std::unique_ptr<ui8[]>, ui64> CTrueTypeFont::loadData(const JsonNode & config)
{
std::string filename = "Data/" + config["file"].String();
return CResourceHandler::get()->load(ResourceID(filename, EResType::TTF_FONT))->readAll();
}
TTF_Font * CTrueTypeFont::loadFont(const JsonNode &config)
{
int pointSize = static_cast<int>(config["size"].Float());
if(!TTF_WasInit() && TTF_Init()==-1)
throw std::runtime_error(std::string("Failed to initialize true type support: ") + TTF_GetError() + "\n");
return TTF_OpenFontRW(SDL_RWFromConstMem(data.first.get(), (int)data.second), 1, pointSize);
}
int CTrueTypeFont::getFontStyle(const JsonNode &config)
{
const JsonVector & names = config["style"].Vector();
int ret = 0;
for(const JsonNode & node : names)
{
if (node.String() == "bold")
ret |= TTF_STYLE_BOLD;
else if (node.String() == "italic")
ret |= TTF_STYLE_ITALIC;
}
return ret;
}
CTrueTypeFont::CTrueTypeFont(const JsonNode & fontConfig):
data(loadData(fontConfig)),
font(loadFont(fontConfig), TTF_CloseFont),
blended(fontConfig["blend"].Bool())
{
assert(font);
TTF_SetFontStyle(font.get(), getFontStyle(fontConfig));
}
size_t CTrueTypeFont::getLineHeight() const
{
return TTF_FontHeight(font.get());
}
size_t CTrueTypeFont::getGlyphWidth(const char *data) const
{
return getStringWidth(std::string(data, Unicode::getCharacterSize(*data)));
/*
int advance;
TTF_GlyphMetrics(font.get(), *data, nullptr, nullptr, nullptr, nullptr, &advance);
return advance;
*/
}
size_t CTrueTypeFont::getStringWidth(const std::string & data) const
{
int width;
TTF_SizeUTF8(font.get(), data.c_str(), &width, nullptr);
return width;
}
void CTrueTypeFont::renderText(SDL_Surface * surface, const std::string & data, const SDL_Color & color, const Point & pos) const
{
if (color.r != 0 && color.g != 0 && color.b != 0) // not black - add shadow
{
SDL_Color black = { 0, 0, 0, SDL_ALPHA_OPAQUE};
renderText(surface, data, black, Point(pos.x + 1, pos.y + 1));
}
if (!data.empty())
{
SDL_Surface * rendered;
if (blended)
rendered = TTF_RenderUTF8_Blended(font.get(), data.c_str(), color);
else
rendered = TTF_RenderUTF8_Solid(font.get(), data.c_str(), color);
assert(rendered);
Rect rect(pos.x, pos.y, rendered->w, rendered->h);
SDL_BlitSurface(rendered, nullptr, surface, &rect);
SDL_FreeSurface(rendered);
}
}
size_t CBitmapHanFont::getCharacterDataOffset(size_t index) const
{
size_t rowSize = (size + 7) / 8; // 1 bit per pixel, rounded up
size_t charSize = rowSize * size; // glyph contains "size" rows
return index * charSize;
}
size_t CBitmapHanFont::getCharacterIndex(ui8 first, ui8 second) const
{
if (second > 0x7f )
second--;
return (first - 0x81) * (12*16 - 2) + (second - 0x40);
}
void CBitmapHanFont::renderCharacter(SDL_Surface * surface, int characterIndex, const SDL_Color & color, int &posX, int &posY) const
{
//TODO: somewhat duplicated with CBitmapFont::renderCharacter();
Rect clipRect;
SDL_GetClipRect(surface, &clipRect);
TColorPutter colorPutter = CSDL_Ext::getPutterFor(surface, 0);
Uint8 bpp = surface->format->BytesPerPixel;
// start of line, may differ from 0 due to end of surface or clipped surface
int lineBegin = std::max<int>(0, clipRect.y - posY);
int lineEnd = std::min((int)size, clipRect.y + clipRect.h - posY);
// start end end of each row, may differ from 0
int rowBegin = std::max<int>(0, clipRect.x - posX);
int rowEnd = std::min<int>((int)size, clipRect.x + clipRect.w - posX);
//for each line in symbol
for(int dy = lineBegin; dy <lineEnd; dy++)
{
Uint8 *dstLine = (Uint8*)surface->pixels;
Uint8 *source = data.first.get() + getCharacterDataOffset(characterIndex);
// shift source\destination pixels to current position
dstLine += (posY+dy) * surface->pitch + posX * bpp;
source += ((size + 7) / 8) * dy;
//for each column in line
for(int dx = rowBegin; dx < rowEnd; dx++)
{
// select current bit in bitmap
int bit = (source[dx / 8] << (dx % 8)) & 0x80;
Uint8* dstPixel = dstLine + dx*bpp;
if (bit != 0)
colorPutter(dstPixel, color.r, color.g, color.b);
}
}
posX += (int)size + 1;
}
void CBitmapHanFont::renderText(SDL_Surface * surface, const std::string & data, const SDL_Color & color, const Point & pos) const
{
int posX = pos.x;
int posY = pos.y;
SDL_LockSurface(surface);
for(size_t i=0; i<data.size(); i += Unicode::getCharacterSize(data[i]))
{
std::string localChar = Unicode::fromUnicode(data.substr(i, Unicode::getCharacterSize(data[i])));
if (localChar.size() == 1)
fallback->renderCharacter(surface, fallback->chars[ui8(localChar[0])], color, posX, posY);
if (localChar.size() == 2)
renderCharacter(surface, (int)getCharacterIndex(localChar[0], localChar[1]), color, posX, posY);
}
SDL_UnlockSurface(surface);
}
CBitmapHanFont::CBitmapHanFont(const JsonNode &config):
fallback(new CBitmapFont(config["fallback"].String())),
data(CResourceHandler::get()->load(ResourceID("data/" + config["name"].String(), EResType::OTHER))->readAll()),
size((size_t)config["size"].Float())
{
// basic tests to make sure that fonts are OK
// 1) fonts must contain 190 "sections", 126 symbols each.
assert(getCharacterIndex(0xfe, 0xff) == 190*126);
// 2) ensure that font size is correct - enough to fit all possible symbols
assert(getCharacterDataOffset(getCharacterIndex(0xfe, 0xff)) == data.second);
}
size_t CBitmapHanFont::getLineHeight() const
{
return std::max(size + 1, fallback->getLineHeight());
}
size_t CBitmapHanFont::getGlyphWidth(const char * data) const
{
std::string localChar = Unicode::fromUnicode(std::string(data, Unicode::getCharacterSize(data[0])));
if (localChar.size() == 1)
return fallback->getGlyphWidth(data);
if (localChar.size() == 2)
return size + 1;
return 0;
}