working mesh shader

VulkanBuffer.cpp

@@ -0,0 +1,135 @@
+/*
+* Vulkan buffer class
+*
+* Encapsulates a Vulkan buffer
+*
+* Copyright (C) 2016 by Sascha Willems - www.saschawillems.de
+*
+* This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
+*/
+
+#include "VulkanBuffer.h"
+
+namespace vks
+{	
+	/** 
+	* Map a memory range of this buffer. If successful, mapped points to the specified buffer range.
+	* 
+	* @param size (Optional) Size of the memory range to map. Pass VK_WHOLE_SIZE to map the complete buffer range.
+	* @param offset (Optional) Byte offset from beginning
+	* 
+	* @return VkResult of the buffer mapping call
+	*/
+	VkResult Buffer::map(VkDeviceSize size, VkDeviceSize offset)
+	{
+		return vkMapMemory(device, memory, offset, size, 0, &mapped);
+	}
+
+	/**
+	* Unmap a mapped memory range
+	*
+	* @note Does not return a result as vkUnmapMemory can't fail
+	*/
+	void Buffer::unmap()
+	{
+		if (mapped)
+		{
+			vkUnmapMemory(device, memory);
+			mapped = nullptr;
+		}
+	}
+
+	/** 
+	* Attach the allocated memory block to the buffer
+	* 
+	* @param offset (Optional) Byte offset (from the beginning) for the memory region to bind
+	* 
+	* @return VkResult of the bindBufferMemory call
+	*/
+	VkResult Buffer::bind(VkDeviceSize offset)
+	{
+		return vkBindBufferMemory(device, buffer, memory, offset);
+	}
+
+	/**
+	* Setup the default descriptor for this buffer
+	*
+	* @param size (Optional) Size of the memory range of the descriptor
+	* @param offset (Optional) Byte offset from beginning
+	*
+	*/
+	void Buffer::setupDescriptor(VkDeviceSize size, VkDeviceSize offset)
+	{
+		descriptor.offset = offset;
+		descriptor.buffer = buffer;
+		descriptor.range = size;
+	}
+
+	/**
+	* Copies the specified data to the mapped buffer
+	* 
+	* @param data Pointer to the data to copy
+	* @param size Size of the data to copy in machine units
+	*
+	*/
+	void Buffer::copyTo(void* data, VkDeviceSize size)
+	{
+		assert(mapped);
+		memcpy(mapped, data, size);
+	}
+
+	/** 
+	* Flush a memory range of the buffer to make it visible to the device
+	*
+	* @note Only required for non-coherent memory
+	*
+	* @param size (Optional) Size of the memory range to flush. Pass VK_WHOLE_SIZE to flush the complete buffer range.
+	* @param offset (Optional) Byte offset from beginning
+	*
+	* @return VkResult of the flush call
+	*/
+	VkResult Buffer::flush(VkDeviceSize size, VkDeviceSize offset)
+	{
+		VkMappedMemoryRange mappedRange = {};
+		mappedRange.sType = VK_STRUCTURE_TYPE_MAPPED_MEMORY_RANGE;
+		mappedRange.memory = memory;
+		mappedRange.offset = offset;
+		mappedRange.size = size;
+		return vkFlushMappedMemoryRanges(device, 1, &mappedRange);
+	}
+
+	/**
+	* Invalidate a memory range of the buffer to make it visible to the host
+	*
+	* @note Only required for non-coherent memory
+	*
+	* @param size (Optional) Size of the memory range to invalidate. Pass VK_WHOLE_SIZE to invalidate the complete buffer range.
+	* @param offset (Optional) Byte offset from beginning
+	*
+	* @return VkResult of the invalidate call
+	*/
+	VkResult Buffer::invalidate(VkDeviceSize size, VkDeviceSize offset)
+	{
+		VkMappedMemoryRange mappedRange = {};
+		mappedRange.sType = VK_STRUCTURE_TYPE_MAPPED_MEMORY_RANGE;
+		mappedRange.memory = memory;
+		mappedRange.offset = offset;
+		mappedRange.size = size;
+		return vkInvalidateMappedMemoryRanges(device, 1, &mappedRange);
+	}
+
+	/** 
+	* Release all Vulkan resources held by this buffer
+	*/
+	void Buffer::destroy()
+	{
+		if (buffer)
+		{
+			vkDestroyBuffer(device, buffer, nullptr);
+		}
+		if (memory)
+		{
+			vkFreeMemory(device, memory, nullptr);
+		}
+	}
+};