From adf4897650af51089d73a1e145639637da9f240f Mon Sep 17 00:00:00 2001
From: HuYingzhuo <hyzboy@gmail.com>
Date: Thu, 25 Apr 2019 14:33:15 +0800
Subject: [PATCH] =?UTF-8?q?Buffer=E6=8F=90=E4=BE=9BWrite=E5=87=BD=E6=95=B0?=
 =?UTF-8?q?=E6=96=B9=E4=BE=BF=E5=86=99=E5=85=A5=E6=95=B0=E6=8D=AE?=
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---
 example/Vulkan/VKBuffer.cpp | 14 ++++++++++++++
 example/Vulkan/VKBuffer.h   |  3 +++
 2 files changed, 17 insertions(+)

diff --git a/example/Vulkan/VKBuffer.cpp b/example/Vulkan/VKBuffer.cpp
index 2358400a..ccf1ba87 100644
--- a/example/Vulkan/VKBuffer.cpp
+++ b/example/Vulkan/VKBuffer.cpp
@@ -27,4 +27,18 @@ void Buffer::Unmap()
 {
     vkUnmapMemory(device,buf.memory);
 }
+
+bool Buffer::Write(const void *ptr,uint32_t start,uint32_t size)
+{
+    if(!ptr)return(false);
+
+    void *dst;
+
+    if(vkMapMemory(device,buf.memory,start,size,0,&dst)!=VK_SUCCESS)
+        return(false);
+
+    memcpy(dst,ptr,size);
+    vkUnmapMemory(device,buf.memory);
+    return(true);
+}
 VK_NAMESPACE_END
diff --git a/example/Vulkan/VKBuffer.h b/example/Vulkan/VKBuffer.h
index 6fe4166b..9ae7c9f8 100644
--- a/example/Vulkan/VKBuffer.h
+++ b/example/Vulkan/VKBuffer.h
@@ -40,6 +40,9 @@ public:
 
     virtual uint8_t *Map(uint32_t start=0,uint32_t size=0);
     void Unmap();
+
+    bool Write(const void *ptr,uint32_t start,uint32_t size);
+    bool Write(const void *ptr){return Write(ptr,0,buf.info.range);}
 };//class Buffer
 
 class VertexBuffer:public Buffer