fix a but, it doesn't disable Depth AttachmentDescription at RenderPass

example/Vulkan/OffscreenRender.cpp

@@ -64,7 +64,7 @@ public:
 
     bool InitOffscreen()
     {
-        os.render_taget=device->CreateRenderTarget(OFFSCREEN_SIZE,OFFSCREEN_SIZE,UFMT_RGBA8,FMT_D16UN);
+        os.render_taget=device->CreateColorRenderTarget(OFFSCREEN_SIZE,OFFSCREEN_SIZE,UFMT_RGBA8);
         if(!os.render_taget)return(false);
         
         os.material_instance=db->CreateMaterialInstance(OS_TEXT("res/material/VertexColor2D"));

src/RenderDevice/Vulkan/VKDeviceRenderPass.cpp

@@ -84,10 +84,13 @@ bool CreateAttachmentDescription(List<VkAttachmentDescription> &desc_list,const
 {
     const uint color_count=color_format.GetCount();
 
-    desc_list.SetCount(color_count+1);
+    const uint count=(depth_format!=FMT_UNDEFINED)?color_count+1:color_count;
+
+    desc_list.SetCount(count);
+
     VkAttachmentDescription *desc=desc_list.GetData();
 
-    for(uint i=0;i<color_count+1;i++)
+    for(uint i=0;i<count;i++)
     {
         desc->flags         = 0;
         desc->samples       = VK_SAMPLE_COUNT_1_BIT;
@@ -111,9 +114,12 @@ bool CreateAttachmentDescription(List<VkAttachmentDescription> &desc_list,const
         ++cf;
     }
 
+    if(depth_format!=FMT_UNDEFINED)
+    {
         desc->finalLayout  = depth_final_layout;
         desc->format       = depth_format;
         desc->storeOp      = VK_ATTACHMENT_STORE_OP_STORE;      //swapchainRT最后"可能"是不需要保存深度的，，，，想想怎么最后弄成"DONT CARE"
+    }
     
     return(true);
 }