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// -*- C++ -*-
/*
* Simple MultimEdia LiTerator(SMELT)
* by Chris Xiong 2015
* Truetype font support implementation
*
* WARNING: This library is in development and interfaces would be very
* unstable.
* This library is developed for the BLR series games.
*/
#include "smttfont.hpp"
struct _smTexState
{
SMTEX tex;
int cx,cy;
int mh;
};
class _smTTChar
{
private:
smQuad quad;
int rw,rh,_w,_h,xofs,yofs;
static SMELT *sm;
public:
~_smTTChar();
float w(){return (float)_w;}
float h(){return (float)_h;}
void free();
bool setChar(wchar_t c,FT_Face ttface,smTTFont* par);
void render(float x,float y,float z,DWORD col,float scalex,float scaley,bool rtl);
};
SMELT *_smTTChar::sm=NULL;
SMELT *smTTFont::sm=NULL;
_smTTChar::~_smTTChar(){free();}
void _smTTChar::free(){sm->smRelease();}
bool _smTTChar::setChar(wchar_t c,FT_Face ttface,smTTFont* par)
{
sm=smGetInterface(SMELT_APILEVEL);
FT_GlyphSlot slot=ttface->glyph;
FT_UInt glyph_index=FT_Get_Char_Index(ttface,c);
if(FT_Load_Glyph(ttface,glyph_index,FT_LOAD_DEFAULT))return false;
if(FT_Render_Glyph(ttface->glyph,FT_RENDER_MODE_NORMAL))return false;
_w=slot->advance.x>>6;_h=3*slot->bitmap.rows-2*slot->bitmap_top;
rw=slot->bitmap.width;rh=slot->bitmap.rows;
xofs=slot->bitmap_left;yofs=slot->bitmap.rows-slot->bitmap_top;
std::pair<SMTEX,std::pair<int,int>> loc=par->_allocate_char(rw?rw:1,rh?rh:1);
int dx=loc.second.first,dy=loc.second.second;
quad.tex=loc.first;
DWORD* px=sm->smTextureLock(quad.tex,dx,dy,rw?rw:1,rh?rh:1,false);
memset(px,0,sizeof(DWORD)*(rw?rw:1)*(rh?rh:1));
int ptr=0;
for(int i=0;i<rh;++i)
for(int j=0;j<rw;++j)
{
#ifdef _D3D
px[i*rw+j]=ARGB(slot->bitmap.buffer[ptr],255,255,255);
#else
px[(rh-i-1)*rw+j]=ARGB(slot->bitmap.buffer[ptr],255,255,255);
#endif
++ptr;
}
sm->smTexutreUnlock(quad.tex);
quad.blend=BLEND_ALPHABLEND;
quad.v[0].tx=1.*dx/par->texw;quad.v[0].ty=1.*dy/par->texh;
quad.v[1].tx=1.*(rw+dx)/par->texw;quad.v[1].ty=1.*dy/par->texh;
quad.v[2].tx=1.*(rw+dx)/par->texw;quad.v[2].ty=1.*(rh+dy)/par->texh;
quad.v[3].tx=1.*dx/par->texw;quad.v[3].ty=1.*(rh+dy)/par->texh;
return true;
}
void _smTTChar::render(float x,float y,float z,DWORD col,float scalex,float scaley,bool rtl)
{
for(int i=0;i<4;++i)quad.v[i].col=col,quad.v[i].z=z;
if(!rtl)
{
quad.v[0].x=x+xofs*scalex;quad.v[0].y=y+(yofs-rh)*scaley;
quad.v[1].x=x+(rw+xofs)*scalex;quad.v[1].y=y+(yofs-rh)*scaley;
quad.v[2].x=x+(rw+xofs)*scalex;quad.v[2].y=y+yofs*scaley;
quad.v[3].x=x+xofs*scalex;quad.v[3].y=y+yofs*scaley;
}
else
{
quad.v[0].x=x+(-rw+xofs)*scalex;quad.v[0].y=y+(yofs-rh)*scaley;
quad.v[1].x=x+xofs*scalex;quad.v[1].y=y+(yofs-rh)*scaley;
quad.v[2].x=x+xofs*scalex;quad.v[2].y=y+yofs*scaley;
quad.v[3].x=x+(-rw+xofs)*scalex;quad.v[3].y=y+yofs*scaley;
}
sm->smRenderQuad(&quad);
}
smTTFont::~smTTFont(){}
unsigned smTTFont::_npot(unsigned x)
{
--x;
for(unsigned i=1;i<sizeof(unsigned)*8;i<<=1)x|=x>>i;
return x+1;
}
std::pair<SMTEX,std::pair<int,int>> smTTFont::_allocate_char(int rw,int rh)
{
std::pair<SMTEX,std::pair<int,int>> ret;
ret.first=0;ret.second.first=ret.second.second=-1;
if(~texw&&(rw>texw||rh>texh))return ret;//allocation failure
for(_smTexState* i:textures)
if(i->cx+rw<=texw&&i->cy+rh<=texh)
{
ret.first=i->tex;
ret.second.first=i->cx;
ret.second.second=i->cy;
i->cx+=rw;
if(rh>i->mh)i->mh=rh;
break;
}
else if(i->cy+i->mh+rh<=texh)
{
i->cx=rw;i->cy+=i->mh;
i->mh=rh;
ret.first=i->tex;
ret.second.first=0;
ret.second.second=i->cy;
break;
}
if(ret.first)return ret;
if(!~texw)
{
int rd=rw>rh?rw:rh;
texw=_npot(mx*rd);
texh=_npot(my*rd);
}
_smTexState* ptex=new _smTexState;
ptex->cx=ptex->cy=ptex->mh=0;
ptex->tex=sm->smTextureCreate(texw,texh);
ret.first=ptex->tex;
ret.second.first=ret.second.second=0;
ptex->cx+=rw;
textures.push_back(ptex);
return ret;
}
bool smTTFont::loadTTF(const char* path,int pt,int cachesize_x,int cachesize_y)
{
sm=smGetInterface(SMELT_APILEVEL);
if(FT_Init_FreeType(&ftlib))return false;
if(FT_New_Face(ftlib,path,0,&ttface))return false;
if(FT_Set_Char_Size(ttface,0,pt*64,96,96))return false;
chars.clear();textures.clear();texw=texh=-1;
mx=cachesize_x;my=cachesize_y;
return true;
}
bool smTTFont::loadTTFFromMemory(char* ptr,DWORD size,int pt,int cachesize_x,int cachesize_y)
{
sm=smGetInterface(SMELT_APILEVEL);
if(FT_Init_FreeType(&ftlib))return false;
if(FT_New_Memory_Face(ftlib,(const FT_Byte*)ptr,(FT_Long)size,0,&ttface))return false;
if(FT_Set_Char_Size(ttface,0,pt*64,96,96))return false;
chars.clear();textures.clear();texw=texh=-1;
mx=cachesize_x;my=cachesize_y;
return true;
}
void smTTFont::releaseTTF()
{
clearCache();
FT_Done_Face(ttface);
FT_Done_FreeType(ftlib);
sm->smRelease();
}
void smTTFont::updateString(const wchar_t *format,...)
{
memset(buf,0,sizeof(buf));
va_list vl;
va_start(vl,format);
vswprintf(buf,1024,format,vl);
va_end(vl);
buf[1024]='\0';
w=h=0;float lh=0;
for(int i=0;buf[i]!='\0';++i)
{
if(chars.find(buf[i])==chars.end()&&buf[i]!=L'\n')
{
chars[buf[i]]=new _smTTChar();
if(!chars[buf[i]]->setChar(buf[i],ttface,this))
{
delete chars[buf[i]];
chars.erase(chars.find(buf[i]));
}
}
if(chars.find(buf[i])!=chars.end())
{
w+=chars[buf[i]]->w();
if(chars[buf[i]]->h()>lh)lh=chars[buf[i]]->h();
}
if(buf[i]==L'\n')h+=lh,lh=0;
}
h+=lh;
}
void smTTFont::render(float x,float y,float z,DWORD col,int align,float scalex,float scaley)
{
float curx,cury,lh;
if(align==ALIGN_LEFT)
{
curx=x;cury=y;lh=0;
for(int i=0;buf[i]!=L'\0';++i)
{
if(buf[i]!=L'\n')
{
if(chars.find(buf[i])!=chars.end())
{
chars[buf[i]]->render(curx,cury,z,col,scalex,scaley,false);
curx+=chars[buf[i]]->w()*scalex;
lh=chars[buf[i]]->h()>lh?chars[buf[i]]->h():lh;
}
}
else cury+=lh*scaley,lh=0,curx=x;
}
}
if(align==ALIGN_RIGHT)
{
curx=x;cury=y;lh=0;
for(int i=wcslen(buf)-1;i>=0;--i)
{
if(buf[i]!=L'\n')
{
if(chars.find(buf[i])!=chars.end())
{
chars[buf[i]]->render(curx,cury,z,col,scalex,scaley,true);
curx-=chars[buf[i]]->w()*scalex;
lh=chars[buf[i]]->h()>lh?chars[buf[i]]->h():lh;
}
}
else cury-=lh*scaley,lh=0,curx=x;
}
}
}
DWORD smTTFont::getCacheSize(){return chars.size();}
void smTTFont::clearCache()
{
for(std::map<wchar_t,_smTTChar*>::iterator i=chars.begin();i!=chars.end();++i)
delete i->second;
for(_smTexState* i:textures)
{
sm->smTextureFree(i->tex);
delete i;
}
textures.clear();
texw=texh=-1;
chars.clear();
}
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