From 2547bc36a7de66593726a30c36e614b9b9ffaea2 Mon Sep 17 00:00:00 2001
From: HuYingzhuo <hyzboy@gmail.com>
Date: Fri, 19 Apr 2019 20:10:59 +0800
Subject: [PATCH] =?UTF-8?q?Device=E5=A2=9E=E5=8A=A0AcquireNextImage?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 example/Vulkan/VKDevice.cpp  | 12 ++++++++++++
 example/Vulkan/VKDevice.h    | 10 ++++++----
 example/Vulkan/VKSemaphore.h |  2 ++
 3 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/example/Vulkan/VKDevice.cpp b/example/Vulkan/VKDevice.cpp
index 92fbf740..56193ac0 100644
--- a/example/Vulkan/VKDevice.cpp
+++ b/example/Vulkan/VKDevice.cpp
@@ -57,8 +57,15 @@ namespace
     }
 }//namespace
 
+Device::Device(DeviceAttribute *da)
+{
+    attr=da;
+    current_framebuffer=0;
+    image_acquired_semaphore=this->CreateSem();
+}
 Device::~Device()
 {
+    delete image_acquired_semaphore;
     delete attr;
 }
 
@@ -213,4 +220,9 @@ Semaphore *Device::CreateSem()
 
     return(new Semaphore(attr->device,sem));
 }
+
+bool Device::AcquireNextImage()
+{
+    return(vkAcquireNextImageKHR(attr->device,attr->swap_chain,UINT64_MAX,*image_acquired_semaphore,VK_NULL_HANDLE,&current_framebuffer)==VK_SUCCESS);
+}
 VK_NAMESPACE_END
diff --git a/example/Vulkan/VKDevice.h b/example/Vulkan/VKDevice.h
index 8451fc63..1dc40ad7 100644
--- a/example/Vulkan/VKDevice.h
+++ b/example/Vulkan/VKDevice.h
@@ -19,14 +19,14 @@ class Device
 {
     DeviceAttribute *attr;
 
+    Semaphore *image_acquired_semaphore;
+    uint32_t current_framebuffer;
+
 private:
 
     friend Device *CreateRenderDevice(VkInstance,const PhysicalDevice *,Window *);
 
-    Device(DeviceAttribute *da)
-    {
-        attr=da;
-    }
+    Device(DeviceAttribute *da);
 
 public:
 
@@ -66,6 +66,8 @@ public:
     Fence *CreateFence();
 
     Semaphore *CreateSem();
+
+    bool AcquireNextImage();
 };//class Device
 VK_NAMESPACE_END
 #endif//HGL_GRAPH_RENDER_SURFACE_INCLUDE
diff --git a/example/Vulkan/VKSemaphore.h b/example/Vulkan/VKSemaphore.h
index 89f4732a..862c9178 100644
--- a/example/Vulkan/VKSemaphore.h
+++ b/example/Vulkan/VKSemaphore.h
@@ -21,6 +21,8 @@ private:
 public:
 
     ~Semaphore();
+
+    operator VkSemaphore(){return sem;}
 };//class Semaphore
 VK_NAMESPACE_END
 #endif//HGL_GRAPH_VULKAN_SEMAPHORE_INCLUDE