added VKBufferMap.cpp/.h

src/SceneGraph/Vulkan/VKBufferMap.cpp

@@ -0,0 +1,43 @@
+#include<hgl/graph/VKBufferMap.h>
+#include<hgl/graph/VKVertexAttribBuffer.h>
+
+VK_NAMESPACE_BEGIN
+
+VKBufferMap::VKBufferMap(DeviceBuffer *buf,VkDeviceSize off,VkDeviceSize s)
+{
+    buffer=buf;
+    offset=off;
+    size=s;
+
+    map_ptr=nullptr;
+}
+
+VKBufferMap::~VKBufferMap()
+{
+    if(map_ptr)
+        buffer->DeviceBuffer::Unmap();
+}
+
+void *VKBufferMap::Map()
+{
+    if(map_ptr)
+        return(map_ptr);
+
+    if(!buffer)
+        return(nullptr);
+
+    map_ptr=buffer->DeviceBuffer::Map(offset,size);
+    return map_ptr;
+
+}
+
+void VKBufferMap::Unmap()
+{
+    if(map_ptr)
+    {
+        buffer->DeviceBuffer::Unmap();
+        map_ptr=nullptr;
+    }
+}
+
+VK_NAMESPACE_END