add gui examples.

src/GUI/ThemeEngine.cpp

@@ -1,5 +1,7 @@
 #include<hgl/gui/ThemeEngine.h>
 #include<hgl/gui/ThemeForm.h>
+#include<hgl/graph/VKRenderTarget.h>
+#include<hgl/graph/VKDevice.h>
 
 namespace hgl
 {
@@ -24,8 +26,48 @@ namespace hgl
         {
             return GetDefaultThemeEngine();
         }
-            
-        bool ThemeEngine::Resize(Form *f,const uint32_t w,const uint32_t h)
+
+        RenderTarget *ThemeEngine::CreateRenderTarget(const uint32_t w,const uint32_t h,const VkFormat format)
+        {
+            const uint width=power_to_2(w);
+            const uint height=power_to_2(h);
+
+            return device->CreateColorRenderTarget(width,height,format);
+        }
+        
+        bool ThemeEngine::Registry(Form *f,const VkFormat format)
+        {
+            if(!f)return(false);
+
+            if(form_list.KeyExist(f))
+                return(false);
+
+            Vector2f size=f->GetSize();
+
+            RenderTarget *rt=CreateRenderTarget(size.x,size.y,format);
+
+            if(!rt)return(false);
+
+            ThemeForm *tf=new ThemeForm(f,rt);
+
+            form_list.Add(f,tf);
+
+            return(true);
+        }
+
+        void ThemeEngine::Unregistry(Form *f)
+        {
+            if(!f)return;
+
+            ThemeForm *tf;
+
+            if(!form_list.Get(f,tf))
+                return;
+
+            delete tf;
+        }
+
+        bool ThemeEngine::Resize(Form *f,const uint32_t w,const uint32_t h,const VkFormat format)
         {
             if(!f)return(false);
 
@@ -39,6 +81,34 @@ namespace hgl
                 return(true);
             }
 
+            RenderTarget *old_rt=tf->GetRenderTarget();
+
+            if(!old_rt)
+            {
+                const VkExtent2D old_size=old_rt->GetExtent();
+
+                if(old_size.width>=w
+                 &&old_size.height>=h)
+                {
+                    tf->Resize(w,h);
+                    return(true);
+                }
+            }
+                
+            graph::RenderTarget *rt=CreateRenderTarget(w,h,format);
+
+            if(!rt)return(false);
+
+            tf->SetRenderTarget(rt);
+            tf->Resize(w,h);
+            return(true);
+        }
+
+        void ThemeEngine::Render(Form *f)
+        {
+            if(!f)return;
+
+            
         }
     }//namespace gui
 }//namespace hgl