307 lines
9.3 KiB
C++
307 lines
9.3 KiB
C++
#include<hgl/graph/font/TextLayout.h>
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#include<hgl/graph/font/TileFont.h>
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#include<hgl/graph/font/TextPrimitive.h>
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#include<hgl/type/Extent.h>
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namespace hgl
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{
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namespace graph
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{
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bool TextLayout::Init()
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{
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if((!tla.font_source&&!font_source)
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||!tla.char_layout_attr)
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return(false);
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direction.text_direction=tla.text_direction;
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if(direction.vertical)
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{
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endless =(tla.max_width<=0.0f);
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splite_line_max_limit = tla.max_width;
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}
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else
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{
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endless =(tla.max_height<=0.0f);
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splite_line_max_limit = tla.max_height;
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}
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if(!font_source)
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font_source=tla.font_source;
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const float origin_char_height=font_source->GetCharHeight();
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x=y=0;
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char_height =ceil(origin_char_height);
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space_size =ceil(origin_char_height*tla.space_size);
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full_space_size =ceil(origin_char_height*tla.full_space_size);
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tab_size =ceil(origin_char_height*tla.tab_size);
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char_gap =ceil(origin_char_height*tla.char_gap);
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line_gap =ceil(origin_char_height*tla.line_gap);
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line_height =ceil(origin_char_height+line_gap);
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paragraph_gap =ceil(origin_char_height*tla.paragraph_gap);
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return(true);
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}
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/**
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* 预处理所有的字符，获取所有字符的宽高，以及是否标点符号等信息
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*/
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template<typename T>
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bool TextLayout::preprocess(TextPrimitive *tr,TileFont *tile_font,const T *str,const int str_length)
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{
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if(!tr
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||!tile_font
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||!str||!*str||str_length<=0
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||!font_source)
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return(false);
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//遍历所有字符，取得每一个字符的基本绘制信息
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{
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draw_chars_count=0;
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chars_sets.ClearData();
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draw_chars_list.ClearData();
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const T *cp=str;
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CharDrawAttr *cda;
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for(int i=0;i<str_length;i++)
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{
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cda=new CharDrawAttr;
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cda->cla=font_source->GetCLA(*cp);
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if(cda->cla->visible)
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{
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chars_sets.Add(*cp); //统计所有不重复字符
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++draw_chars_count;
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}
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draw_chars_list.Add(cda);
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++cp;
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}
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}
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//释放不再使用的字符
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{
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clear_chars_sets=tr->GetCharsSets(); //获取不再使用的字符合集
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clear_chars_sets.Clear(chars_sets); //清除下一步要用的字符合集
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if(clear_chars_sets.GetCount()>0) //可以彻底清除的字符
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{
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tile_font->Unregistry(clear_chars_sets.GetList());
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clear_chars_sets.ClearData();
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}
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}
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//注册不重复字符给tile font系统，获取所有字符的UV
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if(!tile_font->Registry(chars_uv,chars_sets))
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{
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draw_chars_list.ClearData();
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chars_sets.ClearData();
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return(false);
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}
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tr->SetCharsSets(chars_sets); //注册需要使用的字符合集
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//为可绘制字符列表中的字符获取UV
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{
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CharDrawAttr **cda=draw_chars_list.GetData();
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for(int i=0;i<str_length;i++)
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{
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chars_uv.Get((*cda)->cla->attr->ch,(*cda)->uv);
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++cda;
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}
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}
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return(true);
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}
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/**
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* 将字符串断成多行，处理标点禁用，以及英文单词禁拆分
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*/
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bool TextLayout::h_splite_to_lines(float view_limit)
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{
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//const int count=cla_list.GetCount();
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//const CLA **cla=cla_list.GetData();
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//int cur_size=0;
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//for(int i=0;i<count;i++)
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//{
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//}
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return(true);
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}
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bool TextLayout::v_splite_to_lines(float view_limit)
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{
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return(true);
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}
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//int TextLayout::Layout(const int mc,const String<T> &str)
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//{
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// if(mc<=0
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// ||!str
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// ||!(*str))
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// return(-1);
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// max_chars=mc;
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// origin_string=str;
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// if(preprocess()<=0)
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// return(-3);
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//
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// if(!rc->Init(draw_chars_count))
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// return(-4);
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// vertex =rc->CreateVADA<VB4f>(VAN::Position);
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// tex_coord =rc->CreateVADA<VB4f>(VAN::TexCoord);
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// if(!vertex||!tex_coord)
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// return(-5);
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// if(direction.vertical)
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// {
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// if(!v_splite_to_lines(tla->max_height))
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// return(-4);
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// }
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// else
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// {
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// if(!h_splite_to_lines(tla->max_width))
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// return(-4);
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// }
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// return 0;
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//}
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int TextLayout::sl_h_l2r()
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{
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const int count=draw_chars_list.GetCount();
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CharDrawAttr **cda=draw_chars_list.GetData();
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int cur_size=0;
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int left=0,top=0;
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int16 *tp=vertex;
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float *tcp=tex_coord;
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for(int i=0;i<count;i++)
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{
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if((*cda)->cla->visible)
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{
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tp=WriteRect( tp,
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left+(*cda)->cla->metrics.x,
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top -(*cda)->cla->metrics.y+font_source->GetCharHeight(),
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(*cda)->cla->metrics.w,
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(*cda)->cla->metrics.h);
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tcp=WriteRect(tcp,(*cda)->uv);
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left+=(*cda)->cla->metrics.adv_x;
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}
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else
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{
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if((*cda)->cla->attr->ch==' ')
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left+=space_size;
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else
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if((*cda)->cla->attr->ch==U32_FULL_WIDTH_SPACE)
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left+=full_space_size;
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else
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if((*cda)->cla->attr->ch=='\t')
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left+=tab_size;
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else
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if((*cda)->cla->attr->ch=='\n')
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{
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left=0;
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top+=font_source->GetCharHeight()+line_gap;
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}
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else
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{
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left+=(*cda)->cla->metrics.adv_x;
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}
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}
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++cda;
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}
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return count;
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}
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int TextLayout::sl_h_r2l(){return 0;}
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int TextLayout::sl_v_r2l(){return 0;}
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int TextLayout::sl_v_l2r(){return 0;}
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/**
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* 简易文本排版。无任何特殊处理，不支持任何转义符，不支持\r\n
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*/
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template<typename T>
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int TextLayout::SimpleLayout(TextPrimitive *tr,TileFont *tf,const String<T> &str)
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{
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if(!tr)
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return(-1);
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if(!tf||str.IsEmpty())
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return(-1);
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int max_chars=str.Length();
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if(!preprocess<T>(tr,tf,str.c_str(),max_chars))
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return(-2);
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if(draw_chars_count<=0) //可绘制字符为0？？？这是全空格？
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return(-3);
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vertex .SetLength(max_chars*4);
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tex_coord .SetLength(max_chars*4);
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if(!vertex||!tex_coord)
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return(-5);
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int result;
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if(direction.vertical)
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{
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if(direction.right_to_left)
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result=sl_v_r2l();
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else
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result=sl_v_l2r();
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}
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else
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{
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if(direction.right_to_left)
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result=sl_h_r2l();
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else
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result=sl_h_l2r();
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}
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if(result>0)
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{
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tr->SetCharCount(result);
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tr->WriteVertex(vertex);
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tr->WriteTexCoord(tex_coord);
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}
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return result;
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}
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int TextLayout::SimpleLayout(TextPrimitive *tr,TileFont *tf,const UTF16String &str){return this->SimpleLayout<u16char>(tr,tf,str);}
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int TextLayout::SimpleLayout(TextPrimitive *tr,TileFont *tf,const UTF32String &str){return this->SimpleLayout<u32char>(tr,tf,str);}
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//template<typename T>
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//int TextLayout::SimpleLayout(TileFont *tf,const StringList<String<T>> &sl)
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//{
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//}
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//int TextLayout::SimpleLayout(TileFont *tf,const UTF16StringList &sl){return this->SimpleLayout<u16char>(tf,sl);}
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//int TextLayout::SimpleLayout(TileFont *tf,const UTF32StringList &sl){return this->SimpleLayout<u32char>(tf,sl);}
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}//namespace graph
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}//namespace hgl
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