src/Vulkan/VkImage.cpp - SwiftShader - Git at Google

 // Copyright 2018 The SwiftShader Authors. All Rights Reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //    http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.

 #include "VkDeviceMemory.hpp"
 #include "VkBuffer.hpp"
 #include "VkImage.hpp"
 #include "Device/Blitter.hpp"
 #include "Device/Surface.hpp"
 #include <cstring>

 namespace vk
 {

 Image::Image(const VkImageCreateInfo* pCreateInfo, void* mem) :
 	flags(pCreateInfo->flags),
 	imageType(pCreateInfo->imageType),
 	format(pCreateInfo->format),
 	extent(pCreateInfo->extent),
 	mipLevels(pCreateInfo->mipLevels),
 	arrayLayers(pCreateInfo->arrayLayers),
 	samples(pCreateInfo->samples),
 	tiling(pCreateInfo->tiling)
 {
 }

 void Image::destroy(const VkAllocationCallbacks* pAllocator)
 {
 }

 size_t Image::ComputeRequiredAllocationSize(const VkImageCreateInfo* pCreateInfo)
 {
 	return 0;
 }

 const VkMemoryRequirements Image::getMemoryRequirements() const
 {
 	VkMemoryRequirements memoryRequirements;
 	memoryRequirements.alignment = vk::REQUIRED_MEMORY_ALIGNMENT;
 	memoryRequirements.memoryTypeBits = vk::MEMORY_TYPE_GENERIC_BIT;
 	memoryRequirements.size = getStorageSize(flags);
 	return memoryRequirements;
 }

 void Image::bind(VkDeviceMemory pDeviceMemory, VkDeviceSize pMemoryOffset)
 {
 	deviceMemory = Cast(pDeviceMemory);
 	memoryOffset = pMemoryOffset;
 }

 void Image::copyTo(VkImage dstImage, const VkImageCopy& pRegion)
 {
 	// Image copy does not perform any conversion, it simply copies memory from
 	// an image to another image that has the same number of bytes per pixel.
 	Image* dst = Cast(dstImage);
 	int srcBytesPerTexel = bytesPerTexel(pRegion.srcSubresource.aspectMask);
 	ASSERT(srcBytesPerTexel == dst->bytesPerTexel(pRegion.dstSubresource.aspectMask));

 	if(!((pRegion.srcSubresource.aspectMask == VK_IMAGE_ASPECT_COLOR_BIT) ||
 		 (pRegion.srcSubresource.aspectMask == VK_IMAGE_ASPECT_DEPTH_BIT) ||
 		 (pRegion.srcSubresource.aspectMask == VK_IMAGE_ASPECT_STENCIL_BIT)) ||
 	   (pRegion.srcSubresource.mipLevel != 0))
 	{
 		UNIMPLEMENTED();
 	}

 	if(!((pRegion.dstSubresource.aspectMask == VK_IMAGE_ASPECT_COLOR_BIT) ||
 		 (pRegion.dstSubresource.aspectMask == VK_IMAGE_ASPECT_DEPTH_BIT) ||
 		 (pRegion.dstSubresource.aspectMask == VK_IMAGE_ASPECT_STENCIL_BIT)) ||
 	   (pRegion.dstSubresource.mipLevel != 0))
 	{
 		UNIMPLEMENTED();
 	}

 	const char* srcMem = static_cast<const char*>(
 		getTexelPointer(pRegion.srcOffset, pRegion.srcSubresource.baseArrayLayer, pRegion.srcSubresource.aspectMask));
 	char* dstMem = static_cast<char*>(
 		dst->getTexelPointer(pRegion.dstOffset, pRegion.dstSubresource.baseArrayLayer, pRegion.dstSubresource.aspectMask));

 	int srcRowPitchBytes = rowPitchBytes(pRegion.srcSubresource.aspectMask);
 	int srcSlicePitchBytes = slicePitchBytes(pRegion.srcSubresource.aspectMask);
 	int dstRowPitchBytes = dst->rowPitchBytes(pRegion.dstSubresource.aspectMask);
 	int dstSlicePitchBytes = dst->slicePitchBytes(pRegion.dstSubresource.aspectMask);

 	bool isSinglePlane = (pRegion.extent.depth == 1);
 	bool isSingleLine  = (pRegion.extent.height == 1) && isSinglePlane;
 	bool isEntireLine  = (pRegion.extent.width == extent.width) &&
 	                     (pRegion.extent.width == dst->extent.width) &&
 	                     (srcRowPitchBytes == dstRowPitchBytes);
 	bool isEntirePlane = isEntireLine &&
 	                     (pRegion.extent.height == extent.height) &&
 	                     (pRegion.extent.height == dst->extent.height) &&
 	                     (srcSlicePitchBytes == dstSlicePitchBytes);

 	if(isSingleLine)
 	{
 		memcpy(dstMem, srcMem, pRegion.extent.width * srcBytesPerTexel); // Copy one line
 	}
 	else if(isEntireLine && isSinglePlane)
 	{
 		memcpy(dstMem, srcMem, pRegion.extent.height * srcRowPitchBytes); // Copy one plane
 	}
 	else if(isEntirePlane)
 	{
 		memcpy(dstMem, srcMem, pRegion.extent.depth * srcSlicePitchBytes); // Copy multiple planes
 	}
 	else if(isEntireLine) // Copy plane by plane
 	{
 		for(uint32_t z = 0; z < pRegion.extent.depth; z++, dstMem += dstSlicePitchBytes, srcMem += srcSlicePitchBytes)
 		{
 			memcpy(dstMem, srcMem, pRegion.extent.height * srcRowPitchBytes);
 		}
 	}
 	else // Copy line by line
 	{
 		for(uint32_t z = 0; z < pRegion.extent.depth; z++)
 		{
 			for(uint32_t y = 0; y < pRegion.extent.height; y++, dstMem += dstRowPitchBytes, srcMem += srcRowPitchBytes)
 			{
 				memcpy(dstMem, srcMem, pRegion.extent.width * srcBytesPerTexel);
 			}
 		}
 	}
 }

 void Image::copy(VkBuffer buffer, const VkBufferImageCopy& region, bool bufferIsSource)
 {
 	if((region.imageExtent.width != extent.width) ||
 	   (region.imageExtent.height != extent.height) ||
 	   (region.imageExtent.depth != extent.depth) ||
 	   !((region.imageSubresource.aspectMask == VK_IMAGE_ASPECT_COLOR_BIT) ||
 	     (region.imageSubresource.aspectMask == VK_IMAGE_ASPECT_DEPTH_BIT) ||
 	     (region.imageSubresource.aspectMask == VK_IMAGE_ASPECT_STENCIL_BIT)) ||
 	   (region.imageSubresource.mipLevel != 0) ||
 	   (region.imageOffset.x != 0) ||
 	   (region.imageOffset.y != 0) ||
 	   (region.imageOffset.z != 0) ||
 	   (region.bufferRowLength != extent.width) ||
 	   (region.bufferImageHeight != extent.height))
 	{
 		UNIMPLEMENTED();
 	}

 	VkDeviceSize copySize = slicePitchBytes(region.imageSubresource.aspectMask) * region.imageExtent.depth;
 	VkDeviceSize layerSize = slicePitchBytes(region.imageSubresource.aspectMask) * extent.depth;
 	char* bufferMemory = static_cast<char*>(Cast(buffer)->getOffsetPointer(region.bufferOffset));
 	char* imageMemory = static_cast<char*>(deviceMemory->getOffsetPointer(getMemoryOffset(region.imageSubresource.aspectMask)));
 	char* srcMemory = bufferIsSource ? bufferMemory : imageMemory;
 	char* dstMemory = bufferIsSource ? imageMemory : bufferMemory;

 	uint32_t firstLayer = region.imageSubresource.baseArrayLayer;
 	uint32_t lastLayer = firstLayer + region.imageSubresource.layerCount - 1;
 	for(uint32_t layer = firstLayer; layer <= lastLayer; layer++)
 	{
 		memcpy(dstMemory, srcMemory, copySize);
 		srcMemory += layerSize;
 		dstMemory += layerSize;
 	}
 }

 void Image::copyTo(VkBuffer dstBuffer, const VkBufferImageCopy& region)
 {
 	copy(dstBuffer, region, false);
 }

 void Image::copyFrom(VkBuffer srcBuffer, const VkBufferImageCopy& region)
 {
 	copy(srcBuffer, region, true);
 }

 void* Image::getTexelPointer(const VkOffset3D& offset, uint32_t baseArrayLayer, const VkImageAspectFlags& flags) const
 {
 	return deviceMemory->getOffsetPointer(texelOffsetBytesInStorage(offset, baseArrayLayer, flags) + getMemoryOffset(flags));
 }

 VkDeviceSize Image::texelOffsetBytesInStorage(const VkOffset3D& offset, uint32_t baseArrayLayer, const VkImageAspectFlags& flags) const
 {
 	return (baseArrayLayer * extent.depth + offset.z) * slicePitchBytes(flags) + offset.y * rowPitchBytes(flags) + offset.x * bytesPerTexel(flags);
 }

 VkDeviceSize Image::getMemoryOffset(const VkImageAspectFlags& flags) const
 {
 	switch(format)
 	{
 	case VK_FORMAT_D16_UNORM_S8_UINT:
 	case VK_FORMAT_D24_UNORM_S8_UINT:
 	case VK_FORMAT_D32_SFLOAT_S8_UINT:
 		if(flags == VK_IMAGE_ASPECT_STENCIL_BIT)
 		{
 			// Offset by depth buffer to get to stencil buffer
 			return memoryOffset + getStorageSize(VK_IMAGE_ASPECT_DEPTH_BIT);
 		}
 		break;
 	default:
 		break;
 	}

 	return memoryOffset;
 }

 int Image::rowPitchBytes(const VkImageAspectFlags& flags) const
 {
 	// Depth and Stencil pitch should be computed separately
 	ASSERT((flags & (VK_IMAGE_ASPECT_DEPTH_BIT | VK_IMAGE_ASPECT_STENCIL_BIT)) !=
 	                (VK_IMAGE_ASPECT_DEPTH_BIT | VK_IMAGE_ASPECT_STENCIL_BIT));
 	return sw::Surface::pitchB(extent.width, getBorder(), getFormat(flags), false);
 }

 int Image::slicePitchBytes(const VkImageAspectFlags& flags) const
 {
 	// Depth and Stencil slice should be computed separately
 	ASSERT((flags & (VK_IMAGE_ASPECT_DEPTH_BIT | VK_IMAGE_ASPECT_STENCIL_BIT)) !=
 	                (VK_IMAGE_ASPECT_DEPTH_BIT | VK_IMAGE_ASPECT_STENCIL_BIT));
 	return sw::Surface::sliceB(extent.width, extent.height, getBorder(), getFormat(flags), false);
 }

 int Image::bytesPerTexel(const VkImageAspectFlags& flags) const
 {
 	// Depth and Stencil bytes should be computed separately
 	ASSERT((flags & (VK_IMAGE_ASPECT_DEPTH_BIT | VK_IMAGE_ASPECT_STENCIL_BIT)) !=
 	                (VK_IMAGE_ASPECT_DEPTH_BIT | VK_IMAGE_ASPECT_STENCIL_BIT));
 	return sw::Surface::bytes(getFormat(flags));
 }

 VkFormat Image::getFormat(const VkImageAspectFlags& flags) const
 {
 	switch(flags)
 	{
 	case VK_IMAGE_ASPECT_DEPTH_BIT:
 		switch(format)
 		{
 		case VK_FORMAT_D16_UNORM_S8_UINT:
 			return VK_FORMAT_D16_UNORM;
 		case VK_FORMAT_D24_UNORM_S8_UINT:
 			return VK_FORMAT_X8_D24_UNORM_PACK32; // FIXME: This will allocate an extra byte per pixel
 		case VK_FORMAT_D32_SFLOAT_S8_UINT:
 			return VK_FORMAT_D32_SFLOAT;
 		default:
 			break;
 		}
 		break;
 	case VK_IMAGE_ASPECT_STENCIL_BIT:
 		switch(format)
 		{
 		case VK_FORMAT_D16_UNORM_S8_UINT:
 		case VK_FORMAT_D24_UNORM_S8_UINT:
 		case VK_FORMAT_D32_SFLOAT_S8_UINT:
 			return VK_FORMAT_S8_UINT;
 		default:
 			break;
 		}
 		break;
 	default:
 		break;
 	}

 	return format;
 }

 int Image::getBorder() const
 {
 	return ((flags & VK_IMAGE_CREATE_CUBE_COMPATIBLE_BIT) && (imageType == VK_IMAGE_TYPE_2D)) ? 1 : 0;
 }

 VkDeviceSize Image::getStorageSize(const VkImageAspectFlags& flags) const
 {
 	if(mipLevels > 1)
 	{
 		UNIMPLEMENTED();
 	}

 	int slicePitchB = 0;
 	if(sw::Surface::isDepth(format) && sw::Surface::isStencil(format))
 	{
 		switch(flags)
 		{
 		case VK_IMAGE_ASPECT_DEPTH_BIT:
 		case VK_IMAGE_ASPECT_STENCIL_BIT:
 			slicePitchB = slicePitchBytes(flags);
 			break;
 		default:
 			// Allow allocating both depth and stencil contiguously
 			slicePitchB = (slicePitchBytes(VK_IMAGE_ASPECT_DEPTH_BIT) + slicePitchBytes(VK_IMAGE_ASPECT_STENCIL_BIT));
 			break;
 		}
 	}
 	else
 	{
 		slicePitchB = slicePitchBytes(flags);
 	}

 	return arrayLayers * extent.depth * slicePitchB;
 }

 void Image::clear(const VkClearValue& clearValue, const VkRect2D& renderArea, const VkImageSubresourceRange& subresourceRange)
 {
 	if(!((subresourceRange.aspectMask == VK_IMAGE_ASPECT_COLOR_BIT) ||
 		 (subresourceRange.aspectMask == VK_IMAGE_ASPECT_DEPTH_BIT) ||
 		 (subresourceRange.aspectMask == VK_IMAGE_ASPECT_STENCIL_BIT)) ||
 	   (subresourceRange.baseMipLevel != 0) ||
 	   (subresourceRange.levelCount != 1) ||
 	   (subresourceRange.baseArrayLayer != 0) ||
 	   (subresourceRange.layerCount != 1))
 	{
 		UNIMPLEMENTED();
 	}

 	// Set the proper format for the clear value, as described here:
 	// https://www.khronos.org/registry/vulkan/specs/1.1-extensions/html/vkspec.html#clears-values
 	VkFormat clearFormat = VK_FORMAT_R32G32B32A32_SFLOAT;
 	if(sw::Surface::isSignedNonNormalizedInteger(format))
 	{
 		clearFormat = VK_FORMAT_R32G32B32A32_SINT;
 	}
 	else if(sw::Surface::isUnsignedNonNormalizedInteger(format))
 	{
 		clearFormat = VK_FORMAT_R32G32B32A32_UINT;
 	}

 	const sw::Rect rect(renderArea.offset.x, renderArea.offset.y,
 	                    renderArea.offset.x + renderArea.extent.width,
 	                    renderArea.offset.y + renderArea.extent.height);
 	const sw::SliceRect dRect(rect);

 	sw::Surface* surface = sw::Surface::create(extent.width, extent.height, extent.depth,
 		getFormat(subresourceRange.aspectMask), deviceMemory->getOffsetPointer(memoryOffset),
 		rowPitchBytes(subresourceRange.aspectMask), slicePitchBytes(subresourceRange.aspectMask));
 	sw::Blitter blitter;
 	blitter.clear((void*)clearValue.color.float32, clearFormat, surface, dRect, 0xF);
 	delete surface;
 }

 } // namespace vk
	// Copyright 2018 The SwiftShader Authors. All Rights Reserved.
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// http://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.

	#include "VkDeviceMemory.hpp"
	#include "VkBuffer.hpp"
	#include "VkImage.hpp"
	#include "Device/Blitter.hpp"
	#include "Device/Surface.hpp"
	#include <cstring>

	namespace vk
	{

	Image::Image(const VkImageCreateInfo* pCreateInfo, void* mem) :
	flags(pCreateInfo->flags),
	imageType(pCreateInfo->imageType),
	format(pCreateInfo->format),
	extent(pCreateInfo->extent),
	mipLevels(pCreateInfo->mipLevels),
	arrayLayers(pCreateInfo->arrayLayers),
	samples(pCreateInfo->samples),
	tiling(pCreateInfo->tiling)
	{
	}

	void Image::destroy(const VkAllocationCallbacks* pAllocator)
	{
	}

	size_t Image::ComputeRequiredAllocationSize(const VkImageCreateInfo* pCreateInfo)
	{
	return 0;
	}

	const VkMemoryRequirements Image::getMemoryRequirements() const
	{
	VkMemoryRequirements memoryRequirements;
	memoryRequirements.alignment = vk::REQUIRED_MEMORY_ALIGNMENT;
	memoryRequirements.memoryTypeBits = vk::MEMORY_TYPE_GENERIC_BIT;
	memoryRequirements.size = getStorageSize(flags);
	return memoryRequirements;
	}

	void Image::bind(VkDeviceMemory pDeviceMemory, VkDeviceSize pMemoryOffset)
	{
	deviceMemory = Cast(pDeviceMemory);
	memoryOffset = pMemoryOffset;
	}

	void Image::copyTo(VkImage dstImage, const VkImageCopy& pRegion)
	{
	// Image copy does not perform any conversion, it simply copies memory from
	// an image to another image that has the same number of bytes per pixel.
	Image* dst = Cast(dstImage);
	int srcBytesPerTexel = bytesPerTexel(pRegion.srcSubresource.aspectMask);
	ASSERT(srcBytesPerTexel == dst->bytesPerTexel(pRegion.dstSubresource.aspectMask));

	if(!((pRegion.srcSubresource.aspectMask == VK_IMAGE_ASPECT_COLOR_BIT) \|\|
	(pRegion.srcSubresource.aspectMask == VK_IMAGE_ASPECT_DEPTH_BIT) \|\|
	(pRegion.srcSubresource.aspectMask == VK_IMAGE_ASPECT_STENCIL_BIT)) \|\|
	(pRegion.srcSubresource.mipLevel != 0))
	{
	UNIMPLEMENTED();
	}

	if(!((pRegion.dstSubresource.aspectMask == VK_IMAGE_ASPECT_COLOR_BIT) \|\|
	(pRegion.dstSubresource.aspectMask == VK_IMAGE_ASPECT_DEPTH_BIT) \|\|
	(pRegion.dstSubresource.aspectMask == VK_IMAGE_ASPECT_STENCIL_BIT)) \|\|
	(pRegion.dstSubresource.mipLevel != 0))
	{
	UNIMPLEMENTED();
	}

	const char* srcMem = static_cast<const char*>(
	getTexelPointer(pRegion.srcOffset, pRegion.srcSubresource.baseArrayLayer, pRegion.srcSubresource.aspectMask));
	char* dstMem = static_cast<char*>(
	dst->getTexelPointer(pRegion.dstOffset, pRegion.dstSubresource.baseArrayLayer, pRegion.dstSubresource.aspectMask));

	int srcRowPitchBytes = rowPitchBytes(pRegion.srcSubresource.aspectMask);
	int srcSlicePitchBytes = slicePitchBytes(pRegion.srcSubresource.aspectMask);
	int dstRowPitchBytes = dst->rowPitchBytes(pRegion.dstSubresource.aspectMask);
	int dstSlicePitchBytes = dst->slicePitchBytes(pRegion.dstSubresource.aspectMask);

	bool isSinglePlane = (pRegion.extent.depth == 1);
	bool isSingleLine = (pRegion.extent.height == 1) && isSinglePlane;
	bool isEntireLine = (pRegion.extent.width == extent.width) &&
	(pRegion.extent.width == dst->extent.width) &&
	(srcRowPitchBytes == dstRowPitchBytes);
	bool isEntirePlane = isEntireLine &&
	(pRegion.extent.height == extent.height) &&
	(pRegion.extent.height == dst->extent.height) &&
	(srcSlicePitchBytes == dstSlicePitchBytes);

	if(isSingleLine)
	{
	memcpy(dstMem, srcMem, pRegion.extent.width * srcBytesPerTexel); // Copy one line
	}
	else if(isEntireLine && isSinglePlane)
	{
	memcpy(dstMem, srcMem, pRegion.extent.height * srcRowPitchBytes); // Copy one plane
	}
	else if(isEntirePlane)
	{
	memcpy(dstMem, srcMem, pRegion.extent.depth * srcSlicePitchBytes); // Copy multiple planes
	}
	else if(isEntireLine) // Copy plane by plane
	{
	for(uint32_t z = 0; z < pRegion.extent.depth; z++, dstMem += dstSlicePitchBytes, srcMem += srcSlicePitchBytes)
	{
	memcpy(dstMem, srcMem, pRegion.extent.height * srcRowPitchBytes);
	}
	}
	else // Copy line by line
	{
	for(uint32_t z = 0; z < pRegion.extent.depth; z++)
	{
	for(uint32_t y = 0; y < pRegion.extent.height; y++, dstMem += dstRowPitchBytes, srcMem += srcRowPitchBytes)
	{
	memcpy(dstMem, srcMem, pRegion.extent.width * srcBytesPerTexel);
	}
	}
	}
	}

	void Image::copy(VkBuffer buffer, const VkBufferImageCopy& region, bool bufferIsSource)
	{
	if((region.imageExtent.width != extent.width) \|\|
	(region.imageExtent.height != extent.height) \|\|
	(region.imageExtent.depth != extent.depth) \|\|
	!((region.imageSubresource.aspectMask == VK_IMAGE_ASPECT_COLOR_BIT) \|\|
	(region.imageSubresource.aspectMask == VK_IMAGE_ASPECT_DEPTH_BIT) \|\|
	(region.imageSubresource.aspectMask == VK_IMAGE_ASPECT_STENCIL_BIT)) \|\|
	(region.imageSubresource.mipLevel != 0) \|\|
	(region.imageOffset.x != 0) \|\|
	(region.imageOffset.y != 0) \|\|
	(region.imageOffset.z != 0) \|\|
	(region.bufferRowLength != extent.width) \|\|
	(region.bufferImageHeight != extent.height))
	{
	UNIMPLEMENTED();
	}

	VkDeviceSize copySize = slicePitchBytes(region.imageSubresource.aspectMask) * region.imageExtent.depth;
	VkDeviceSize layerSize = slicePitchBytes(region.imageSubresource.aspectMask) * extent.depth;
	char* bufferMemory = static_cast<char*>(Cast(buffer)->getOffsetPointer(region.bufferOffset));
	char* imageMemory = static_cast<char*>(deviceMemory->getOffsetPointer(getMemoryOffset(region.imageSubresource.aspectMask)));
	char* srcMemory = bufferIsSource ? bufferMemory : imageMemory;
	char* dstMemory = bufferIsSource ? imageMemory : bufferMemory;

	uint32_t firstLayer = region.imageSubresource.baseArrayLayer;
	uint32_t lastLayer = firstLayer + region.imageSubresource.layerCount - 1;
	for(uint32_t layer = firstLayer; layer <= lastLayer; layer++)
	{
	memcpy(dstMemory, srcMemory, copySize);
	srcMemory += layerSize;
	dstMemory += layerSize;
	}
	}

	void Image::copyTo(VkBuffer dstBuffer, const VkBufferImageCopy& region)
	{
	copy(dstBuffer, region, false);
	}

	void Image::copyFrom(VkBuffer srcBuffer, const VkBufferImageCopy& region)
	{
	copy(srcBuffer, region, true);
	}

	void* Image::getTexelPointer(const VkOffset3D& offset, uint32_t baseArrayLayer, const VkImageAspectFlags& flags) const
	{
	return deviceMemory->getOffsetPointer(texelOffsetBytesInStorage(offset, baseArrayLayer, flags) + getMemoryOffset(flags));
	}

	VkDeviceSize Image::texelOffsetBytesInStorage(const VkOffset3D& offset, uint32_t baseArrayLayer, const VkImageAspectFlags& flags) const
	{
	return (baseArrayLayer * extent.depth + offset.z) * slicePitchBytes(flags) + offset.y * rowPitchBytes(flags) + offset.x * bytesPerTexel(flags);
	}

	VkDeviceSize Image::getMemoryOffset(const VkImageAspectFlags& flags) const
	{
	switch(format)
	{
	case VK_FORMAT_D16_UNORM_S8_UINT:
	case VK_FORMAT_D24_UNORM_S8_UINT:
	case VK_FORMAT_D32_SFLOAT_S8_UINT:
	if(flags == VK_IMAGE_ASPECT_STENCIL_BIT)
	{
	// Offset by depth buffer to get to stencil buffer
	return memoryOffset + getStorageSize(VK_IMAGE_ASPECT_DEPTH_BIT);
	}
	break;
	default:
	break;
	}

	return memoryOffset;
	}

	int Image::rowPitchBytes(const VkImageAspectFlags& flags) const
	{
	// Depth and Stencil pitch should be computed separately
	ASSERT((flags & (VK_IMAGE_ASPECT_DEPTH_BIT \| VK_IMAGE_ASPECT_STENCIL_BIT)) !=
	(VK_IMAGE_ASPECT_DEPTH_BIT \| VK_IMAGE_ASPECT_STENCIL_BIT));
	return sw::Surface::pitchB(extent.width, getBorder(), getFormat(flags), false);
	}

	int Image::slicePitchBytes(const VkImageAspectFlags& flags) const
	{
	// Depth and Stencil slice should be computed separately
	ASSERT((flags & (VK_IMAGE_ASPECT_DEPTH_BIT \| VK_IMAGE_ASPECT_STENCIL_BIT)) !=
	(VK_IMAGE_ASPECT_DEPTH_BIT \| VK_IMAGE_ASPECT_STENCIL_BIT));
	return sw::Surface::sliceB(extent.width, extent.height, getBorder(), getFormat(flags), false);
	}

	int Image::bytesPerTexel(const VkImageAspectFlags& flags) const
	{
	// Depth and Stencil bytes should be computed separately
	ASSERT((flags & (VK_IMAGE_ASPECT_DEPTH_BIT \| VK_IMAGE_ASPECT_STENCIL_BIT)) !=
	(VK_IMAGE_ASPECT_DEPTH_BIT \| VK_IMAGE_ASPECT_STENCIL_BIT));
	return sw::Surface::bytes(getFormat(flags));
	}

	VkFormat Image::getFormat(const VkImageAspectFlags& flags) const
	{
	switch(flags)
	{
	case VK_IMAGE_ASPECT_DEPTH_BIT:
	switch(format)
	{
	case VK_FORMAT_D16_UNORM_S8_UINT:
	return VK_FORMAT_D16_UNORM;
	case VK_FORMAT_D24_UNORM_S8_UINT:
	return VK_FORMAT_X8_D24_UNORM_PACK32; // FIXME: This will allocate an extra byte per pixel
	case VK_FORMAT_D32_SFLOAT_S8_UINT:
	return VK_FORMAT_D32_SFLOAT;
	default:
	break;
	}
	break;
	case VK_IMAGE_ASPECT_STENCIL_BIT:
	switch(format)
	{
	case VK_FORMAT_D16_UNORM_S8_UINT:
	case VK_FORMAT_D24_UNORM_S8_UINT:
	case VK_FORMAT_D32_SFLOAT_S8_UINT:
	return VK_FORMAT_S8_UINT;
	default:
	break;
	}
	break;
	default:
	break;
	}

	return format;
	}

	int Image::getBorder() const
	{
	return ((flags & VK_IMAGE_CREATE_CUBE_COMPATIBLE_BIT) && (imageType == VK_IMAGE_TYPE_2D)) ? 1 : 0;
	}

	VkDeviceSize Image::getStorageSize(const VkImageAspectFlags& flags) const
	{
	if(mipLevels > 1)
	{
	UNIMPLEMENTED();
	}

	int slicePitchB = 0;
	if(sw::Surface::isDepth(format) && sw::Surface::isStencil(format))
	{
	switch(flags)
	{
	case VK_IMAGE_ASPECT_DEPTH_BIT:
	case VK_IMAGE_ASPECT_STENCIL_BIT:
	slicePitchB = slicePitchBytes(flags);
	break;
	default:
	// Allow allocating both depth and stencil contiguously
	slicePitchB = (slicePitchBytes(VK_IMAGE_ASPECT_DEPTH_BIT) + slicePitchBytes(VK_IMAGE_ASPECT_STENCIL_BIT));
	break;
	}
	}
	else
	{
	slicePitchB = slicePitchBytes(flags);
	}

	return arrayLayers * extent.depth * slicePitchB;
	}

	void Image::clear(const VkClearValue& clearValue, const VkRect2D& renderArea, const VkImageSubresourceRange& subresourceRange)
	{
	if(!((subresourceRange.aspectMask == VK_IMAGE_ASPECT_COLOR_BIT) \|\|
	(subresourceRange.aspectMask == VK_IMAGE_ASPECT_DEPTH_BIT) \|\|
	(subresourceRange.aspectMask == VK_IMAGE_ASPECT_STENCIL_BIT)) \|\|
	(subresourceRange.baseMipLevel != 0) \|\|
	(subresourceRange.levelCount != 1) \|\|
	(subresourceRange.baseArrayLayer != 0) \|\|
	(subresourceRange.layerCount != 1))
	{
	UNIMPLEMENTED();
	}

	// Set the proper format for the clear value, as described here:
	// https://www.khronos.org/registry/vulkan/specs/1.1-extensions/html/vkspec.html#clears-values
	VkFormat clearFormat = VK_FORMAT_R32G32B32A32_SFLOAT;
	if(sw::Surface::isSignedNonNormalizedInteger(format))
	{
	clearFormat = VK_FORMAT_R32G32B32A32_SINT;
	}
	else if(sw::Surface::isUnsignedNonNormalizedInteger(format))
	{
	clearFormat = VK_FORMAT_R32G32B32A32_UINT;
	}

	const sw::Rect rect(renderArea.offset.x, renderArea.offset.y,
	renderArea.offset.x + renderArea.extent.width,
	renderArea.offset.y + renderArea.extent.height);
	const sw::SliceRect dRect(rect);

	sw::Surface* surface = sw::Surface::create(extent.width, extent.height, extent.depth,
	getFormat(subresourceRange.aspectMask), deviceMemory->getOffsetPointer(memoryOffset),
	rowPitchBytes(subresourceRange.aspectMask), slicePitchBytes(subresourceRange.aspectMask));
	sw::Blitter blitter;
	blitter.clear((void*)clearValue.color.float32, clearFormat, surface, dRect, 0xF);
	delete surface;
	}

	} // namespace vk