813 lines
17 KiB
C++
813 lines
17 KiB
C++
#ifdef FREETYPE_ENABLED
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#include "dynamic_font.h"
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#include "os/file_access.h"
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Ref<DynamicFontAtSize> DynamicFontData::_get_dynamic_font_at_size(int p_size) {
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if (size_cache.has(p_size)) {
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return Ref<DynamicFontAtSize>( size_cache[p_size] );
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}
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Ref<DynamicFontAtSize> dfas;
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dfas.instance();
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dfas->font=Ref<DynamicFontData>( this );
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size_cache[p_size]=dfas.ptr();
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dfas->size=p_size;
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dfas->_load();
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return dfas;
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}
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void DynamicFontData::set_font_ptr(const uint8_t* p_font_mem,int p_font_mem_size) {
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font_mem=p_font_mem;
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font_mem_size=p_font_mem_size;
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}
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void DynamicFontData::set_font_path(const String& p_path) {
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font_path=p_path;
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}
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void DynamicFontData::set_force_autohinter(bool p_force) {
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force_autohinter=p_force;
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}
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DynamicFontData::DynamicFontData()
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{
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force_autohinter=false;
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font_mem=NULL;
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font_mem_size=0;
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}
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DynamicFontData::~DynamicFontData()
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{
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}
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////////////////////
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Error DynamicFontAtSize::_load() {
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int error = FT_Init_FreeType( &library );
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ERR_EXPLAIN(TTR("Error initializing FreeType."));
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ERR_FAIL_COND_V( error !=0, ERR_CANT_CREATE );
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if (font->font_path!=String()) {
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FileAccess *f=FileAccess::open(font->font_path,FileAccess::READ);
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ERR_FAIL_COND_V(!f,ERR_CANT_OPEN);
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memset(&stream,0,sizeof(FT_StreamRec));
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stream.base=NULL;
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stream.size=f->get_len();
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stream.pos=0;
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stream.descriptor.pointer=f;
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stream.read=_ft_stream_io;
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stream.close=_ft_stream_close;
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FT_Open_Args fargs;
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memset(&fargs,0,sizeof(FT_Open_Args));
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fargs.flags=FT_OPEN_STREAM;
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fargs.stream=&stream;
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error = FT_Open_Face( library,&fargs,0,&face);
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} else if (font->font_mem) {
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memset(&stream,0,sizeof(FT_StreamRec));
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stream.base=(unsigned char*)font->font_mem;
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stream.size=font->font_mem_size;
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stream.pos=0;
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FT_Open_Args fargs;
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memset(&fargs,0,sizeof(FT_Open_Args));
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fargs.memory_base=(unsigned char*)font->font_mem;
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fargs.memory_size=font->font_mem_size;
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fargs.flags= FT_OPEN_MEMORY;
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fargs.stream=&stream;
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error = FT_Open_Face( library,&fargs,0,&face);
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} else {
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ERR_EXPLAIN("DynamicFont uninitialized");
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ERR_FAIL_V(ERR_UNCONFIGURED);
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}
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//error = FT_New_Face( library, src_path.utf8().get_data(),0,&face );
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if ( error == FT_Err_Unknown_File_Format ) {
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ERR_EXPLAIN(TTR("Unknown font format."));
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FT_Done_FreeType( library );
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} else if ( error ) {
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ERR_EXPLAIN(TTR("Error loading font."));
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FT_Done_FreeType( library );
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}
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ERR_FAIL_COND_V(error,ERR_FILE_CANT_OPEN);
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/*error = FT_Set_Char_Size(face,0,64*size,512,512);
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if ( error ) {
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FT_Done_FreeType( library );
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ERR_EXPLAIN(TTR("Invalid font size."));
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ERR_FAIL_COND_V( error, ERR_INVALID_PARAMETER );
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}*/
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error = FT_Set_Pixel_Sizes(face,0,size);
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ascent=face->size->metrics.ascender>>6;
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descent=-face->size->metrics.descender>>6;
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linegap=0;
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//print_line("ASCENT: "+itos(ascent)+" descent "+itos(descent)+" hinted: "+itos(face->face_flags&FT_FACE_FLAG_HINTER));
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valid=true;
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return OK;
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}
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float DynamicFontAtSize::get_height() const {
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return ascent+descent;
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}
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float DynamicFontAtSize::get_ascent() const {
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return ascent;
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}
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float DynamicFontAtSize::get_descent() const {
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return descent;
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}
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Size2 DynamicFontAtSize::get_char_size(CharType p_char,CharType p_next,const Vector<Ref<DynamicFontAtSize> >& p_fallbacks) const {
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if (!valid)
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return Size2(1,1);
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const_cast<DynamicFontAtSize*>(this)->_update_char(p_char);
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const Character *c = char_map.getptr(p_char);
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ERR_FAIL_COND_V(!c,Size2());
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Size2 ret(0,get_height());
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if (!c->found) {
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//not found, try in fallbacks
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for(int i=0;i<p_fallbacks.size();i++) {
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DynamicFontAtSize *fb = const_cast<DynamicFontAtSize*>(p_fallbacks[i].ptr());
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if (!fb->valid)
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continue;
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fb->_update_char(p_char);
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const Character *ch = fb->char_map.getptr(p_char);
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ERR_CONTINUE(!ch);
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if (!ch->found)
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continue;
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c=ch;
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break;
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}
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//not found, try 0xFFFD to display 'not found'.
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if (!c->found) {
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const_cast<DynamicFontAtSize*>(this)->_update_char(0xFFFD);
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c = char_map.getptr(0xFFFD);
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ERR_FAIL_COND_V(!c,Size2());
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}
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}
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if (c->found) {
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ret.x=c->advance;
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}
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if (p_next) {
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FT_Vector delta;
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FT_Get_Kerning( face, p_char,p_next, FT_KERNING_DEFAULT, &delta );
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if (delta.x==0) {
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for(int i=0;i<p_fallbacks.size();i++) {
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DynamicFontAtSize *fb = const_cast<DynamicFontAtSize*>(p_fallbacks[i].ptr());
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if (!fb->valid)
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continue;
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FT_Get_Kerning( fb->face, p_char,p_next, FT_KERNING_DEFAULT, &delta );
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if (delta.x==0)
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continue;
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ret.x+=delta.x>>6;
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break;
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}
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} else {
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ret.x+=delta.x>>6;
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}
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}
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return ret;
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}
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float DynamicFontAtSize::draw_char(RID p_canvas_item, const Point2& p_pos, const CharType& p_char,const CharType& p_next,const Color& p_modulate,const Vector<Ref<DynamicFontAtSize> >& p_fallbacks) const {
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if (!valid)
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return 0;
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const_cast<DynamicFontAtSize*>(this)->_update_char(p_char);
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const Character * c = char_map.getptr(p_char);
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float advance=0;
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if (!c->found) {
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//not found, try in fallbacks
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bool used_fallback=false;
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for(int i=0;i<p_fallbacks.size();i++) {
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DynamicFontAtSize *fb = const_cast<DynamicFontAtSize*>(p_fallbacks[i].ptr());
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if (!fb->valid)
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continue;
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fb->_update_char(p_char);
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const Character *ch = fb->char_map.getptr(p_char);
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ERR_CONTINUE(!ch);
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if (!ch->found)
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continue;
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Point2 cpos=p_pos;
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cpos.x+=ch->h_align;
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cpos.y-=get_ascent();
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cpos.y+=ch->v_align;
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ERR_FAIL_COND_V( ch->texture_idx<-1 || ch->texture_idx>=fb->textures.size(),0);
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if (ch->texture_idx!=-1)
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VisualServer::get_singleton()->canvas_item_add_texture_rect_region( p_canvas_item, Rect2( cpos, ch->rect.size ), fb->textures[ch->texture_idx].texture->get_rid(),ch->rect, p_modulate );
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advance=ch->advance;
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used_fallback=true;
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break;
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}
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//not found, try 0xFFFD to display 'not found'.
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if (!used_fallback) {
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const_cast<DynamicFontAtSize*>(this)->_update_char(0xFFFD);
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c = char_map.getptr(0xFFFD);
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}
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}
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if (c->found) {
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Point2 cpos=p_pos;
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cpos.x+=c->h_align;
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cpos.y-=get_ascent();
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cpos.y+=c->v_align;
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ERR_FAIL_COND_V( c->texture_idx<-1 || c->texture_idx>=textures.size(),0);
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if (c->texture_idx!=-1)
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VisualServer::get_singleton()->canvas_item_add_texture_rect_region( p_canvas_item, Rect2( cpos, c->rect.size ), textures[c->texture_idx].texture->get_rid(),c->rect, p_modulate );
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advance=c->advance;
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//textures[c->texture_idx].texture->draw(p_canvas_item,Vector2());
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}
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if (p_next) {
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FT_Vector delta;
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FT_Get_Kerning( face, p_char,p_next, FT_KERNING_DEFAULT, &delta );
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if (delta.x==0) {
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for(int i=0;i<p_fallbacks.size();i++) {
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DynamicFontAtSize *fb = const_cast<DynamicFontAtSize*>(p_fallbacks[i].ptr());
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if (!fb->valid)
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continue;
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FT_Get_Kerning( fb->face, p_char,p_next, FT_KERNING_DEFAULT, &delta );
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if (delta.x==0)
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continue;
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advance+=delta.x>>6;
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break;
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}
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} else {
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advance+=delta.x>>6;
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}
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}
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return advance;
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}
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unsigned long DynamicFontAtSize::_ft_stream_io(FT_Stream stream, unsigned long offset, unsigned char* buffer, unsigned long count ) {
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FileAccess *f=(FileAccess*)stream->descriptor.pointer;
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if (f->get_pos()!=offset) {
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f->seek(offset);
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}
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if (count==0)
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return 0;
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return f->get_buffer(buffer,count);
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}
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void DynamicFontAtSize::_ft_stream_close(FT_Stream stream) {
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FileAccess *f=(FileAccess*)stream->descriptor.pointer;
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f->close();
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memdelete(f);
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}
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void DynamicFontAtSize::_update_char(CharType p_char) {
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if (char_map.has(p_char))
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return;
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_THREAD_SAFE_METHOD_
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FT_GlyphSlot slot = face->glyph;
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if (FT_Get_Char_Index( face, p_char)==0) {
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//not found
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Character ch;
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ch.texture_idx=-1;
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ch.advance=0;
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ch.h_align=0;
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ch.v_align=0;
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ch.found=false;
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char_map[p_char]=ch;
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return;
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}
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int error = FT_Load_Char( face, p_char, FT_LOAD_RENDER|(font->force_autohinter?FT_LOAD_FORCE_AUTOHINT:0) );
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if (!error) {
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error = FT_Render_Glyph( face->glyph, ft_render_mode_normal );
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}
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if (error) {
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int advance=0;
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//stbtt_GetCodepointHMetrics(&font->info, p_char, &advance, 0);
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//print_line("char has no bitmap: "+itos(p_char)+" but advance is "+itos(advance*scale));
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Character ch;
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ch.texture_idx=-1;
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ch.advance=advance;
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ch.h_align=0;
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ch.v_align=0;
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ch.found=false;
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char_map[p_char]=ch;
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return;
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}
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int w = slot->bitmap.width;
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int h = slot->bitmap.rows;
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int p = slot->bitmap.pitch;
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int yofs=slot->bitmap_top;
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int xofs=slot->bitmap_left;
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int advance=slot->advance.x>>6;
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int mw=w+rect_margin*2;
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int mh=h+rect_margin*2;
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if (mw>4096 || mh>4096) {
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ERR_FAIL_COND(mw>4096);
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ERR_FAIL_COND(mh>4096);
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}
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//find a texture to fit this...
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int tex_index=-1;
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int tex_x=0;
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int tex_y=0;
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for(int i=0;i<textures.size();i++) {
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CharTexture &ct=textures[i];
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if (mw > ct.texture_size || mh > ct.texture_size) //too big for this texture
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continue;
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tex_y=0x7FFFFFFF;
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tex_x=0;
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for(int j=0;j<ct.texture_size-mw;j++) {
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int max_y=0;
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for(int k=j;k<j+mw;k++) {
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int y = ct.offsets[k];
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if (y>max_y)
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max_y=y;
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}
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if (max_y<tex_y) {
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tex_y=max_y;
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tex_x=j;
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}
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}
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if (tex_y==0x7FFFFFFF || tex_y+mh > ct.texture_size)
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continue; //fail, could not fit it here
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tex_index=i;
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break;
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}
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// print_line("CHAR: "+String::chr(p_char)+" TEX INDEX: "+itos(tex_index)+" X: "+itos(tex_x)+" Y: "+itos(tex_y));
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if (tex_index==-1) {
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//could not find texture to fit, create one
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tex_x = 0;
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tex_y = 0;
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int texsize = MAX(size*8,256);
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if (mw>texsize)
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texsize=mw; //special case, adapt to it?
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if (mh>texsize)
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texsize=mh; //special case, adapt to it?
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texsize=nearest_power_of_2(texsize);
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texsize=MIN(texsize,4096);
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CharTexture tex;
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tex.texture_size=texsize;
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tex.imgdata.resize(texsize*texsize*2); //grayscale alpha
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{
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//zero texture
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DVector<uint8_t>::Write w = tex.imgdata.write();
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ERR_FAIL_COND(texsize*texsize*2 > tex.imgdata.size());
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for(int i=0;i<texsize*texsize*2;i++) {
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w[i]=0;
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}
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}
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tex.offsets.resize(texsize);
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for(int i=0;i<texsize;i++) //zero offsets
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tex.offsets[i]=0;
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textures.push_back(tex);
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tex_index=textures.size()-1;
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}
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//fit character in char texture
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CharTexture &tex=textures[tex_index];
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{
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DVector<uint8_t>::Write wr = tex.imgdata.write();
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for(int i=0;i<h;i++) {
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for(int j=0;j<w;j++) {
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int ofs = ( (i+tex_y+rect_margin)*tex.texture_size+j+tex_x+rect_margin)*2;
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ERR_FAIL_COND(ofs >= tex.imgdata.size());
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wr[ofs+0]=255; //grayscale as 1
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wr[ofs+1]=slot->bitmap.buffer[i*slot->bitmap.width+j];
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}
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}
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}
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//blit to image and texture
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{
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Image img(tex.texture_size,tex.texture_size,0,Image::FORMAT_GRAYSCALE_ALPHA,tex.imgdata);
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if (tex.texture.is_null()) {
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tex.texture.instance();
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tex.texture->create_from_image(img,0/*Texture::FLAG_FILTER*/);
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} else {
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tex.texture->set_data(img); //update
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}
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}
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// update height array
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for(int k=tex_x;k<tex_x+mw;k++) {
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tex.offsets[k]=tex_y+mh;
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}
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Character chr;
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chr.h_align=xofs;
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chr.v_align=ascent-yofs;// + ascent - descent;
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chr.advance=advance;
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chr.texture_idx=tex_index;
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chr.found=true;
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chr.rect=Rect2(tex_x+rect_margin,tex_y+rect_margin,w,h);
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//print_line("CHAR: "+String::chr(p_char)+" TEX INDEX: "+itos(tex_index)+" RECT: "+chr.rect+" X OFS: "+itos(xofs)+" Y OFS: "+itos(yofs));
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char_map[p_char]=chr;
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}
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DynamicFontAtSize::DynamicFontAtSize() {
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valid=false;
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rect_margin=1;
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ascent=1;
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descent=1;
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linegap=1;
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}
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DynamicFontAtSize::~DynamicFontAtSize(){
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if (valid) {
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FT_Done_FreeType( library );
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font->size_cache.erase(size);
|
|
}
|
|
}
|
|
|
|
/////////////////////////
|
|
|
|
|
|
|
|
void DynamicFont::set_font_data(const Ref<DynamicFontData>& p_data) {
|
|
|
|
data=p_data;
|
|
data_at_size=data->_get_dynamic_font_at_size(size);
|
|
emit_changed();
|
|
}
|
|
|
|
|
|
Ref<DynamicFontData> DynamicFont::get_font_data() const{
|
|
|
|
return data;
|
|
}
|
|
|
|
void DynamicFont::set_size(int p_size){
|
|
|
|
if (size==p_size)
|
|
return;
|
|
size=p_size;
|
|
ERR_FAIL_COND(p_size<1);
|
|
if (!data.is_valid())
|
|
return;
|
|
data_at_size=data->_get_dynamic_font_at_size(size);
|
|
for(int i=0;i<fallbacks.size();i++) {
|
|
fallback_data_at_size[i]=fallbacks[i]->_get_dynamic_font_at_size(size);
|
|
}
|
|
|
|
emit_changed();
|
|
_change_notify();
|
|
}
|
|
int DynamicFont::get_size() const{
|
|
|
|
return size;
|
|
}
|
|
|
|
float DynamicFont::get_height() const{
|
|
|
|
if (!data_at_size.is_valid())
|
|
return 1;
|
|
|
|
return data_at_size->get_height();
|
|
}
|
|
|
|
float DynamicFont::get_ascent() const{
|
|
|
|
if (!data_at_size.is_valid())
|
|
return 1;
|
|
|
|
return data_at_size->get_ascent();
|
|
}
|
|
|
|
float DynamicFont::get_descent() const{
|
|
|
|
if (!data_at_size.is_valid())
|
|
return 1;
|
|
|
|
return data_at_size->get_descent();
|
|
|
|
}
|
|
|
|
Size2 DynamicFont::get_char_size(CharType p_char,CharType p_next) const{
|
|
|
|
if (!data_at_size.is_valid())
|
|
return Size2(1,1);
|
|
|
|
return data_at_size->get_char_size(p_char,p_next,fallback_data_at_size);
|
|
|
|
}
|
|
|
|
bool DynamicFont::is_distance_field_hint() const{
|
|
|
|
return false;
|
|
}
|
|
|
|
float DynamicFont::draw_char(RID p_canvas_item, const Point2& p_pos, const CharType& p_char,const CharType& p_next,const Color& p_modulate) const {
|
|
|
|
if (!data_at_size.is_valid())
|
|
return 0;
|
|
|
|
return data_at_size->draw_char(p_canvas_item,p_pos,p_char,p_next,p_modulate,fallback_data_at_size);
|
|
|
|
}
|
|
void DynamicFont::set_fallback(int p_idx,const Ref<DynamicFontData>& p_data) {
|
|
|
|
ERR_FAIL_COND(p_data.is_null());
|
|
ERR_FAIL_INDEX(p_idx,fallbacks.size());
|
|
fallbacks[p_idx]=p_data;
|
|
fallback_data_at_size[p_idx]=fallbacks[p_idx]->_get_dynamic_font_at_size(size);
|
|
|
|
}
|
|
|
|
void DynamicFont::add_fallback(const Ref<DynamicFontData>& p_data) {
|
|
|
|
ERR_FAIL_COND(p_data.is_null());
|
|
fallbacks.push_back(p_data);
|
|
fallback_data_at_size.push_back(fallbacks[fallbacks.size()-1]->_get_dynamic_font_at_size(size)); //const..
|
|
|
|
_change_notify();
|
|
emit_changed();
|
|
_change_notify();
|
|
|
|
}
|
|
|
|
int DynamicFont::get_fallback_count() const {
|
|
return fallbacks.size();
|
|
}
|
|
Ref<DynamicFontData> DynamicFont::get_fallback(int p_idx) const {
|
|
|
|
ERR_FAIL_INDEX_V(p_idx,fallbacks.size(),Ref<DynamicFontData>());
|
|
|
|
return fallbacks[p_idx];
|
|
}
|
|
void DynamicFont::remove_fallback(int p_idx) {
|
|
|
|
ERR_FAIL_INDEX(p_idx,fallbacks.size());
|
|
fallbacks.remove(p_idx);
|
|
fallback_data_at_size.remove(p_idx);
|
|
emit_changed();
|
|
_change_notify();
|
|
}
|
|
|
|
bool DynamicFont::_set(const StringName& p_name, const Variant& p_value) {
|
|
|
|
String str = p_name;
|
|
if (str.begins_with("fallback/")) {
|
|
int idx = str.get_slicec('/',1).to_int();
|
|
Ref<DynamicFontData> fd = p_value;
|
|
|
|
if (fd.is_valid()) {
|
|
if (idx==fallbacks.size()) {
|
|
add_fallback(fd);
|
|
return true;
|
|
} else if (idx>=0 && idx<fallbacks.size()) {
|
|
set_fallback(idx,fd);
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
} else if (idx>=0 && idx<fallbacks.size()) {
|
|
remove_fallback(idx);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool DynamicFont::_get(const StringName& p_name,Variant &r_ret) const{
|
|
|
|
String str = p_name;
|
|
if (str.begins_with("fallback/")) {
|
|
int idx = str.get_slicec('/',1).to_int();
|
|
|
|
if (idx==fallbacks.size()) {
|
|
r_ret=Ref<DynamicFontData>();
|
|
return true;
|
|
} else if (idx>=0 && idx<fallbacks.size()) {
|
|
r_ret=get_fallback(idx);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
void DynamicFont::_get_property_list( List<PropertyInfo> *p_list) const{
|
|
|
|
for(int i=0;i<fallbacks.size();i++) {
|
|
p_list->push_back(PropertyInfo(Variant::OBJECT,"fallback/"+itos(i),PROPERTY_HINT_RESOURCE_TYPE,"DynamicFontData"));
|
|
}
|
|
|
|
p_list->push_back(PropertyInfo(Variant::OBJECT,"fallback/"+itos(fallbacks.size()),PROPERTY_HINT_RESOURCE_TYPE,"DynamicFontData"));
|
|
}
|
|
|
|
|
|
void DynamicFont::_bind_methods() {
|
|
|
|
ObjectTypeDB::bind_method(_MD("set_font_data","data:DynamicFontData"),&DynamicFont::set_font_data);
|
|
ObjectTypeDB::bind_method(_MD("get_font_data:DynamicFontData"),&DynamicFont::get_font_data);
|
|
|
|
ObjectTypeDB::bind_method(_MD("set_size","data"),&DynamicFont::set_size);
|
|
ObjectTypeDB::bind_method(_MD("get_size"),&DynamicFont::get_size);
|
|
|
|
ObjectTypeDB::bind_method(_MD("add_fallback","data:DynamicFontData"),&DynamicFont::add_fallback);
|
|
ObjectTypeDB::bind_method(_MD("set_fallback","idx","data:DynamicFontData"),&DynamicFont::set_fallback);
|
|
ObjectTypeDB::bind_method(_MD("get_fallback:DynamicFontData","idx"),&DynamicFont::get_fallback);
|
|
ObjectTypeDB::bind_method(_MD("remove_fallback","idx"),&DynamicFont::remove_fallback);
|
|
ObjectTypeDB::bind_method(_MD("get_fallback_count"),&DynamicFont::get_fallback_count);
|
|
|
|
|
|
ADD_PROPERTY(PropertyInfo(Variant::INT,"font/size"),_SCS("set_size"),_SCS("get_size"));
|
|
ADD_PROPERTY(PropertyInfo(Variant::OBJECT,"font/font",PROPERTY_HINT_RESOURCE_TYPE,"DynamicFontData"),_SCS("set_font_data"),_SCS("get_font_data"));
|
|
}
|
|
|
|
DynamicFont::DynamicFont() {
|
|
|
|
size=16;
|
|
}
|
|
|
|
DynamicFont::~DynamicFont() {
|
|
|
|
}
|
|
|
|
/////////////////////////
|
|
|
|
|
|
RES ResourceFormatLoaderDynamicFont::load(const String &p_path, const String& p_original_path, Error *r_error) {
|
|
|
|
if (r_error)
|
|
*r_error=ERR_FILE_CANT_OPEN;
|
|
|
|
Ref<DynamicFontData> dfont;
|
|
dfont.instance();;
|
|
dfont->set_font_path(p_path);
|
|
|
|
|
|
if (r_error)
|
|
*r_error=OK;
|
|
|
|
return dfont;
|
|
}
|
|
|
|
void ResourceFormatLoaderDynamicFont::get_recognized_extensions(List<String> *p_extensions) const {
|
|
|
|
p_extensions->push_back("ttf");
|
|
p_extensions->push_back("otf");
|
|
}
|
|
|
|
bool ResourceFormatLoaderDynamicFont::handles_type(const String& p_type) const {
|
|
|
|
return (p_type=="DynamicFontData");
|
|
}
|
|
|
|
String ResourceFormatLoaderDynamicFont::get_resource_type(const String &p_path) const {
|
|
|
|
String el = p_path.extension().to_lower();
|
|
if (el=="ttf" || el=="otf")
|
|
return "DynamicFontData";
|
|
return "";
|
|
}
|
|
|
|
|
|
#endif
|