splited function at TextRender

example/Vulkan/DrawText.cpp

@@ -53,7 +53,7 @@ private:
     {
         UTF16String str;
 
-        FontSource *fs=CreateFontSource(OS_TEXT("微软雅黑"),12);
+        FontSource *fs=AcquireFontSource(OS_TEXT("微软雅黑"),12);
 
         text_render=CreateTextRender(device,fs,device_render_pass,ubo_camera_info);
         if(!text_render)

inc/hgl/graph/font/TextRender.h

@@ -51,7 +51,11 @@ namespace hgl
 
         public:
 
+            TextRenderable *CreateRenderable();
             TextRenderable *CreateRenderable(const UTF16String &str);
+
+            bool Layout(TextRenderable *tr,const UTF16String &str);
+
             RenderableInstance *CreateRenderableInstance(TextRenderable *text_render_obj);
         };//class TextRender
 
@@ -68,7 +72,7 @@ namespace hgl
          * @param name 字体名称
          * @param size 字体象素高度
          */
-        FontSource *CreateFontSource(const os_char *name,const uint32_t size);
+        FontSource *AcquireFontSource(const os_char *name,const uint32_t size);
 
         /**
          * 创建一个文本渲染器.

src/SceneGraph/font/TextRender.cpp

@@ -138,19 +138,32 @@ namespace hgl
             return(true);
         }
 
+        TextRenderable *TextRender::CreateRenderable(const UTF16String &str)
+        {
+            return db->CreateTextRenderable(material);
+        }
+
         TextRenderable *TextRender::CreateRenderable(const UTF16String &str)
         {
             TextRenderable *tr=db->CreateTextRenderable(material);
 
             if(tl_engine->SimpleLayout(tr,tile_font,str)<=0)
-            {
+                return(tr);
-                delete tr;
-                return(nullptr);
-            }
 
             return tr;
         }
 
+        bool TextRender::Layout(TextRenderable *tr,const UTF16String &str)
+        {
+            if(!tr)
+                return(false);
+
+            if(tl_engine->SimpleLayout(tr,tile_font,str)<=0)
+                return(false);
+
+            return true;
+        }
+
         RenderableInstance *TextRender::CreateRenderableInstance(TextRenderable *text_render_obj)
         {
             return db->CreateRenderableInstance(text_render_obj,material_instance,pipeline);
@@ -171,7 +184,7 @@ namespace hgl
             return font_source;
         }
 
-        FontSource *CreateFontSource(const os_char *name,const uint32_t size)
+        FontSource *AcquireFontSource(const os_char *name,const uint32_t size)
         {
             Font fnt(name,0,size);