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      1 // Copyright 2018 The SwiftShader Authors. All Rights Reserved.
      2 //
      3 // Licensed under the Apache License, Version 2.0 (the "License");
      4 // you may not use this file except in compliance with the License.
      5 // You may obtain a copy of the License at
      6 //
      7 //    http://www.apache.org/licenses/LICENSE-2.0
      8 //
      9 // Unless required by applicable law or agreed to in writing, software
     10 // distributed under the License is distributed on an "AS IS" BASIS,
     11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     12 // See the License for the specific language governing permissions and
     13 // limitations under the License.
     14 
     15 #include "VkDeviceMemory.hpp"
     16 #include "VkBuffer.hpp"
     17 #include "VkImage.hpp"
     18 #include "Device/Blitter.hpp"
     19 #include "Device/Surface.hpp"
     20 #include <cstring>
     21 
     22 namespace vk
     23 {
     24 
     25 Image::Image(const VkImageCreateInfo* pCreateInfo, void* mem) :
     26 	flags(pCreateInfo->flags),
     27 	imageType(pCreateInfo->imageType),
     28 	format(pCreateInfo->format),
     29 	extent(pCreateInfo->extent),
     30 	mipLevels(pCreateInfo->mipLevels),
     31 	arrayLayers(pCreateInfo->arrayLayers),
     32 	samples(pCreateInfo->samples),
     33 	tiling(pCreateInfo->tiling)
     34 {
     35 	blitter = new sw::Blitter();
     36 }
     37 
     38 void Image::destroy(const VkAllocationCallbacks* pAllocator)
     39 {
     40 	delete blitter;
     41 }
     42 
     43 size_t Image::ComputeRequiredAllocationSize(const VkImageCreateInfo* pCreateInfo)
     44 {
     45 	return 0;
     46 }
     47 
     48 const VkMemoryRequirements Image::getMemoryRequirements() const
     49 {
     50 	VkMemoryRequirements memoryRequirements;
     51 	memoryRequirements.alignment = vk::REQUIRED_MEMORY_ALIGNMENT;
     52 	memoryRequirements.memoryTypeBits = vk::MEMORY_TYPE_GENERIC_BIT;
     53 	memoryRequirements.size = getStorageSize(flags);
     54 	return memoryRequirements;
     55 }
     56 
     57 void Image::bind(VkDeviceMemory pDeviceMemory, VkDeviceSize pMemoryOffset)
     58 {
     59 	deviceMemory = Cast(pDeviceMemory);
     60 	memoryOffset = pMemoryOffset;
     61 }
     62 
     63 void Image::getSubresourceLayout(const VkImageSubresource* pSubresource, VkSubresourceLayout* pLayout) const
     64 {
     65 	uint32_t bpp = bytesPerTexel(flags);
     66 	pLayout->offset = getMemoryOffset(flags, pSubresource->mipLevel, pSubresource->arrayLayer);
     67 	pLayout->size = getMipLevelSize(flags, pSubresource->mipLevel);
     68 	pLayout->rowPitch = rowPitchBytes(flags, pSubresource->mipLevel);
     69 	pLayout->depthPitch = slicePitchBytes(flags, pSubresource->mipLevel);
     70 	pLayout->arrayPitch = getLayerSize(flags);
     71 }
     72 
     73 void Image::copyTo(VkImage dstImage, const VkImageCopy& pRegion)
     74 {
     75 	// Image copy does not perform any conversion, it simply copies memory from
     76 	// an image to another image that has the same number of bytes per pixel.
     77 	Image* dst = Cast(dstImage);
     78 	int srcBytesPerTexel = bytesPerTexel(pRegion.srcSubresource.aspectMask);
     79 	ASSERT(srcBytesPerTexel == dst->bytesPerTexel(pRegion.dstSubresource.aspectMask));
     80 
     81 	if(!((pRegion.srcSubresource.aspectMask == VK_IMAGE_ASPECT_COLOR_BIT) ||
     82 		 (pRegion.srcSubresource.aspectMask == VK_IMAGE_ASPECT_DEPTH_BIT) ||
     83 		 (pRegion.srcSubresource.aspectMask == VK_IMAGE_ASPECT_STENCIL_BIT)) ||
     84 		 (pRegion.srcSubresource.baseArrayLayer != 0) ||
     85 		 (pRegion.srcSubresource.layerCount != 1))
     86 	{
     87 		UNIMPLEMENTED();
     88 	}
     89 
     90 	if(!((pRegion.dstSubresource.aspectMask == VK_IMAGE_ASPECT_COLOR_BIT) ||
     91 		 (pRegion.dstSubresource.aspectMask == VK_IMAGE_ASPECT_DEPTH_BIT) ||
     92 		 (pRegion.dstSubresource.aspectMask == VK_IMAGE_ASPECT_STENCIL_BIT)) ||
     93 		 (pRegion.dstSubresource.baseArrayLayer != 0) ||
     94 		 (pRegion.dstSubresource.layerCount != 1))
     95 	{
     96 		UNIMPLEMENTED();
     97 	}
     98 
     99 	const char* srcMem = static_cast<const char*>(getTexelPointer(pRegion.srcOffset, pRegion.srcSubresource));
    100 	char* dstMem = static_cast<char*>(dst->getTexelPointer(pRegion.dstOffset, pRegion.dstSubresource));
    101 
    102 	int srcRowPitchBytes = rowPitchBytes(pRegion.srcSubresource.aspectMask, pRegion.srcSubresource.mipLevel);
    103 	int srcSlicePitchBytes = slicePitchBytes(pRegion.srcSubresource.aspectMask, pRegion.srcSubresource.mipLevel);
    104 	int dstRowPitchBytes = dst->rowPitchBytes(pRegion.dstSubresource.aspectMask, pRegion.dstSubresource.mipLevel);
    105 	int dstSlicePitchBytes = dst->slicePitchBytes(pRegion.dstSubresource.aspectMask, pRegion.dstSubresource.mipLevel);
    106 
    107 	VkExtent3D srcExtent = getMipLevelExtent(pRegion.srcSubresource.mipLevel);
    108 	VkExtent3D dstExtent = dst->getMipLevelExtent(pRegion.dstSubresource.mipLevel);
    109 
    110 	bool isSinglePlane = (pRegion.extent.depth == 1);
    111 	bool isSingleLine  = (pRegion.extent.height == 1) && isSinglePlane;
    112 	// In order to copy multiple lines using a single memcpy call, we
    113 	// have to make sure that we need to copy the entire line and that
    114 	// both source and destination lines have the same length in bytes
    115 	bool isEntireLine  = (pRegion.extent.width == srcExtent.width) &&
    116 	                     (pRegion.extent.width == dstExtent.width) &&
    117 	                     (srcRowPitchBytes == dstRowPitchBytes);
    118 	// In order to copy multiple planes using a single memcpy call, we
    119 	// have to make sure that we need to copy the entire plane and that
    120 	// both source and destination planes have the same length in bytes
    121 	bool isEntirePlane = isEntireLine &&
    122 	                     (pRegion.extent.height == srcExtent.height) &&
    123 	                     (pRegion.extent.height == dstExtent.height) &&
    124 	                     (srcSlicePitchBytes == dstSlicePitchBytes);
    125 
    126 	if(isSingleLine) // Copy one line
    127 	{
    128 		memcpy(dstMem, srcMem, pRegion.extent.width * srcBytesPerTexel);
    129 	}
    130 	else if(isEntireLine && isSinglePlane) // Copy one plane
    131 	{
    132 		memcpy(dstMem, srcMem, pRegion.extent.height * srcRowPitchBytes);
    133 	}
    134 	else if(isEntirePlane) // Copy multiple planes
    135 	{
    136 		memcpy(dstMem, srcMem, pRegion.extent.depth * srcSlicePitchBytes);
    137 	}
    138 	else if(isEntireLine) // Copy plane by plane
    139 	{
    140 		for(uint32_t z = 0; z < pRegion.extent.depth; z++, dstMem += dstSlicePitchBytes, srcMem += srcSlicePitchBytes)
    141 		{
    142 			memcpy(dstMem, srcMem, pRegion.extent.height * srcRowPitchBytes);
    143 		}
    144 	}
    145 	else // Copy line by line
    146 	{
    147 		for(uint32_t z = 0; z < pRegion.extent.depth; z++)
    148 		{
    149 			for(uint32_t y = 0; y < pRegion.extent.height; y++, dstMem += dstRowPitchBytes, srcMem += srcRowPitchBytes)
    150 			{
    151 				memcpy(dstMem, srcMem, pRegion.extent.width * srcBytesPerTexel);
    152 			}
    153 		}
    154 	}
    155 }
    156 
    157 void Image::copy(VkBuffer buffer, const VkBufferImageCopy& region, bool bufferIsSource)
    158 {
    159 	if(!((region.imageSubresource.aspectMask == VK_IMAGE_ASPECT_COLOR_BIT) ||
    160 	     (region.imageSubresource.aspectMask == VK_IMAGE_ASPECT_DEPTH_BIT) ||
    161 	     (region.imageSubresource.aspectMask == VK_IMAGE_ASPECT_STENCIL_BIT)))
    162 	{
    163 		UNIMPLEMENTED();
    164 	}
    165 
    166 	VkExtent3D mipLevelExtent = getMipLevelExtent(region.imageSubresource.mipLevel);
    167 	int imageBytesPerTexel = bytesPerTexel(region.imageSubresource.aspectMask);
    168 	int imageRowPitchBytes = rowPitchBytes(region.imageSubresource.aspectMask, region.imageSubresource.mipLevel);
    169 	int imageSlicePitchBytes = slicePitchBytes(region.imageSubresource.aspectMask, region.imageSubresource.mipLevel);
    170 	int bufferRowPitchBytes = ((region.bufferRowLength == 0) ? region.imageExtent.width : region.bufferRowLength) *
    171 	                          imageBytesPerTexel;
    172 	int bufferSlicePitchBytes = (((region.bufferImageHeight == 0) || (region.bufferRowLength == 0))) ?
    173                                 region.imageExtent.height * bufferRowPitchBytes :
    174 	                            (region.bufferImageHeight * region.bufferRowLength) * imageBytesPerTexel;
    175 
    176 	int srcSlicePitchBytes = bufferIsSource ? bufferSlicePitchBytes : imageSlicePitchBytes;
    177 	int dstSlicePitchBytes = bufferIsSource ? imageSlicePitchBytes : bufferSlicePitchBytes;
    178 	int srcRowPitchBytes = bufferIsSource ? bufferRowPitchBytes : imageRowPitchBytes;
    179 	int dstRowPitchBytes = bufferIsSource ? imageRowPitchBytes : bufferRowPitchBytes;
    180 
    181 	bool isSinglePlane = (region.imageExtent.depth == 1);
    182 	bool isSingleLine  = (region.imageExtent.height == 1) && isSinglePlane;
    183 	bool isEntireLine  = (region.imageExtent.width == mipLevelExtent.width) &&
    184 	                     (imageRowPitchBytes == bufferRowPitchBytes);
    185 	bool isEntirePlane = isEntireLine && (region.imageExtent.height == mipLevelExtent.height) &&
    186 	                     (imageSlicePitchBytes == bufferSlicePitchBytes);
    187 
    188 	VkDeviceSize layerSize = getLayerSize(flags);
    189 	char* bufferMemory = static_cast<char*>(Cast(buffer)->getOffsetPointer(region.bufferOffset));
    190 	char* imageMemory = static_cast<char*>(deviceMemory->getOffsetPointer(
    191 	                    getMemoryOffset(region.imageSubresource.aspectMask, region.imageSubresource.mipLevel,
    192 	                                    region.imageSubresource.baseArrayLayer) +
    193 	                    texelOffsetBytesInStorage(region.imageOffset, region.imageSubresource)));
    194 	char* srcMemory = bufferIsSource ? bufferMemory : imageMemory;
    195 	char* dstMemory = bufferIsSource ? imageMemory : bufferMemory;
    196 
    197 	VkDeviceSize copySize = 0;
    198 	if(isSingleLine)
    199 	{
    200 		copySize = region.imageExtent.width * imageBytesPerTexel;
    201 	}
    202 	else if(isEntireLine && isSinglePlane)
    203 	{
    204 		copySize = region.imageExtent.height * imageRowPitchBytes;
    205 	}
    206 	else if(isEntirePlane)
    207 	{
    208 		copySize = region.imageExtent.depth * imageSlicePitchBytes; // Copy multiple planes
    209 	}
    210 	else if(isEntireLine) // Copy plane by plane
    211 	{
    212 		copySize = region.imageExtent.height * imageRowPitchBytes;
    213 	}
    214 	else // Copy line by line
    215 	{
    216 		copySize = region.imageExtent.width * imageBytesPerTexel;
    217 	}
    218 
    219 	for(uint32_t i = 0; i < region.imageSubresource.layerCount; i++)
    220 	{
    221 		if(isSingleLine || (isEntireLine && isSinglePlane) || isEntirePlane)
    222 		{
    223 			memcpy(dstMemory, srcMemory, copySize);
    224 		}
    225 		else if(isEntireLine) // Copy plane by plane
    226 		{
    227 			for(uint32_t z = 0; z < region.imageExtent.depth; z++)
    228 			{
    229 				memcpy(dstMemory, srcMemory, copySize);
    230 				srcMemory += srcSlicePitchBytes;
    231 				dstMemory += dstSlicePitchBytes;
    232 			}
    233 		}
    234 		else // Copy line by line
    235 		{
    236 			for(uint32_t z = 0; z < region.imageExtent.depth; z++)
    237 			{
    238 				for(uint32_t y = 0; y < region.imageExtent.height; y++)
    239 				{
    240 					memcpy(dstMemory, srcMemory, copySize);
    241 					srcMemory += srcRowPitchBytes;
    242 					dstMemory += dstRowPitchBytes;
    243 				}
    244 			}
    245 		}
    246 
    247 		srcMemory += layerSize;
    248 		dstMemory += layerSize;
    249 	}
    250 }
    251 
    252 void Image::copyTo(VkBuffer dstBuffer, const VkBufferImageCopy& region)
    253 {
    254 	copy(dstBuffer, region, false);
    255 }
    256 
    257 void Image::copyFrom(VkBuffer srcBuffer, const VkBufferImageCopy& region)
    258 {
    259 	copy(srcBuffer, region, true);
    260 }
    261 
    262 void* Image::getTexelPointer(const VkOffset3D& offset, const VkImageSubresourceLayers& subresource) const
    263 {
    264 	return deviceMemory->getOffsetPointer(texelOffsetBytesInStorage(offset, subresource) +
    265 	       getMemoryOffset(flags, subresource.mipLevel, subresource.baseArrayLayer));
    266 }
    267 
    268 VkDeviceSize Image::texelOffsetBytesInStorage(const VkOffset3D& offset, const VkImageSubresourceLayers& subresource) const
    269 {
    270 	return offset.z * slicePitchBytes(flags, subresource.mipLevel) +
    271 	       offset.y * rowPitchBytes(flags, subresource.mipLevel) +
    272 	       offset.x * bytesPerTexel(flags);
    273 }
    274 
    275 VkExtent3D Image::getMipLevelExtent(uint32_t mipLevel) const
    276 {
    277 	VkExtent3D mipLevelExtent;
    278 	mipLevelExtent.width = extent.width >> mipLevel;
    279 	mipLevelExtent.height = extent.height >> mipLevel;
    280 	mipLevelExtent.depth = extent.depth >> mipLevel;
    281 
    282 	if(mipLevelExtent.width == 0)
    283 	{
    284 		mipLevelExtent.width = 1;
    285 	}
    286 	if(mipLevelExtent.height == 0)
    287 	{
    288 		mipLevelExtent.height = 1;
    289 	}
    290 	if(mipLevelExtent.depth == 0)
    291 	{
    292 		mipLevelExtent.depth = 1;
    293 	}
    294 	return mipLevelExtent;
    295 }
    296 
    297 int Image::rowPitchBytes(const VkImageAspectFlags& flags, uint32_t mipLevel) const
    298 {
    299 	// Depth and Stencil pitch should be computed separately
    300 	ASSERT((flags & (VK_IMAGE_ASPECT_DEPTH_BIT | VK_IMAGE_ASPECT_STENCIL_BIT)) !=
    301 	                (VK_IMAGE_ASPECT_DEPTH_BIT | VK_IMAGE_ASPECT_STENCIL_BIT));
    302 	return sw::Surface::pitchB(getMipLevelExtent(mipLevel).width, isCube() ? 1 : 0, getFormat(flags), false);
    303 }
    304 
    305 int Image::slicePitchBytes(const VkImageAspectFlags& flags, uint32_t mipLevel) const
    306 {
    307 	// Depth and Stencil slice should be computed separately
    308 	ASSERT((flags & (VK_IMAGE_ASPECT_DEPTH_BIT | VK_IMAGE_ASPECT_STENCIL_BIT)) !=
    309 	                (VK_IMAGE_ASPECT_DEPTH_BIT | VK_IMAGE_ASPECT_STENCIL_BIT));
    310 	VkExtent3D mipLevelExtent = getMipLevelExtent(mipLevel);
    311 	return sw::Surface::sliceB(mipLevelExtent.width, mipLevelExtent.height, isCube() ? 1 : 0, getFormat(flags), false);
    312 }
    313 
    314 int Image::bytesPerTexel(const VkImageAspectFlags& flags) const
    315 {
    316 	// Depth and Stencil bytes should be computed separately
    317 	ASSERT((flags & (VK_IMAGE_ASPECT_DEPTH_BIT | VK_IMAGE_ASPECT_STENCIL_BIT)) !=
    318 	                (VK_IMAGE_ASPECT_DEPTH_BIT | VK_IMAGE_ASPECT_STENCIL_BIT));
    319 	return sw::Surface::bytes(getFormat(flags));
    320 }
    321 
    322 VkFormat Image::getFormat(const VkImageAspectFlags& flags) const
    323 {
    324 	switch(flags)
    325 	{
    326 	case VK_IMAGE_ASPECT_DEPTH_BIT:
    327 		switch(format)
    328 		{
    329 		case VK_FORMAT_D16_UNORM_S8_UINT:
    330 			return VK_FORMAT_D16_UNORM;
    331 		case VK_FORMAT_D24_UNORM_S8_UINT:
    332 			return VK_FORMAT_X8_D24_UNORM_PACK32; // FIXME: This will allocate an extra byte per pixel
    333 		case VK_FORMAT_D32_SFLOAT_S8_UINT:
    334 			return VK_FORMAT_D32_SFLOAT;
    335 		default:
    336 			break;
    337 		}
    338 		break;
    339 	case VK_IMAGE_ASPECT_STENCIL_BIT:
    340 		switch(format)
    341 		{
    342 		case VK_FORMAT_D16_UNORM_S8_UINT:
    343 		case VK_FORMAT_D24_UNORM_S8_UINT:
    344 		case VK_FORMAT_D32_SFLOAT_S8_UINT:
    345 			return VK_FORMAT_S8_UINT;
    346 		default:
    347 			break;
    348 		}
    349 		break;
    350 	default:
    351 		break;
    352 	}
    353 
    354 	return format;
    355 }
    356 
    357 bool Image::isCube() const
    358 {
    359 	return (flags & VK_IMAGE_CREATE_CUBE_COMPATIBLE_BIT) && (imageType == VK_IMAGE_TYPE_2D);
    360 }
    361 
    362 VkDeviceSize Image::getMemoryOffset(const VkImageAspectFlags& flags) const
    363 {
    364 	switch(format)
    365 	{
    366 	case VK_FORMAT_D16_UNORM_S8_UINT:
    367 	case VK_FORMAT_D24_UNORM_S8_UINT:
    368 	case VK_FORMAT_D32_SFLOAT_S8_UINT:
    369 		if(flags == VK_IMAGE_ASPECT_STENCIL_BIT)
    370 		{
    371 			// Offset by depth buffer to get to stencil buffer
    372 			return memoryOffset + getStorageSize(VK_IMAGE_ASPECT_DEPTH_BIT);
    373 		}
    374 		break;
    375 	default:
    376 		break;
    377 	}
    378 
    379 	return memoryOffset;
    380 }
    381 
    382 VkDeviceSize Image::getMemoryOffset(const VkImageAspectFlags& flags, uint32_t mipLevel) const
    383 {
    384 	VkDeviceSize offset = getMemoryOffset(flags);
    385 	for(uint32_t i = 0; i < mipLevel; ++i)
    386 	{
    387 		offset += getMipLevelSize(flags, i);
    388 	}
    389 	return offset;
    390 }
    391 
    392 VkDeviceSize Image::getMemoryOffset(const VkImageAspectFlags& flags, uint32_t mipLevel, uint32_t layer) const
    393 {
    394 	return layer * getLayerSize(flags) + getMemoryOffset(flags, mipLevel);
    395 }
    396 
    397 VkDeviceSize Image::getMipLevelSize(const VkImageAspectFlags& flags, uint32_t mipLevel) const
    398 {
    399 	int slicePitchB = 0;
    400 	if(sw::Surface::isDepth(format) && sw::Surface::isStencil(format))
    401 	{
    402 		switch(flags)
    403 		{
    404 		case VK_IMAGE_ASPECT_DEPTH_BIT:
    405 		case VK_IMAGE_ASPECT_STENCIL_BIT:
    406 			slicePitchB = slicePitchBytes(flags, mipLevel);
    407 			break;
    408 		default:
    409 			// Allow allocating both depth and stencil contiguously
    410 			slicePitchB = (slicePitchBytes(VK_IMAGE_ASPECT_DEPTH_BIT, mipLevel) +
    411 			               slicePitchBytes(VK_IMAGE_ASPECT_STENCIL_BIT, mipLevel));
    412 			break;
    413 		}
    414 	}
    415 	else
    416 	{
    417 		slicePitchB = slicePitchBytes(flags, mipLevel);
    418 	}
    419 
    420 	return getMipLevelExtent(mipLevel).depth * slicePitchB;
    421 }
    422 
    423 VkDeviceSize Image::getLayerSize(const VkImageAspectFlags& flags) const
    424 {
    425 	VkDeviceSize layerSize = 0;
    426 
    427 	for(uint32_t mipLevel = 0; mipLevel < mipLevels; ++mipLevel)
    428 	{
    429 		layerSize += getMipLevelSize(flags, mipLevel);
    430 	}
    431 
    432 	return layerSize;
    433 }
    434 
    435 VkDeviceSize Image::getStorageSize(const VkImageAspectFlags& flags) const
    436 {
    437 	return arrayLayers * getLayerSize(flags);
    438 }
    439 
    440 sw::Surface* Image::asSurface(const VkImageAspectFlags& flags, uint32_t mipLevel, uint32_t layer) const
    441 {
    442 	VkExtent3D mipLevelExtent = getMipLevelExtent(mipLevel);
    443 	return sw::Surface::create(mipLevelExtent.width, mipLevelExtent.height, mipLevelExtent.depth, getFormat(flags),
    444 	                           deviceMemory->getOffsetPointer(getMemoryOffset(flags, mipLevel, layer)),
    445 	                           rowPitchBytes(flags, mipLevel), slicePitchBytes(flags, mipLevel));
    446 }
    447 
    448 void Image::blit(VkImage dstImage, const VkImageBlit& region, VkFilter filter)
    449 {
    450 	VkImageAspectFlags srcFlags = region.srcSubresource.aspectMask;
    451 	VkImageAspectFlags dstFlags = region.dstSubresource.aspectMask;
    452 	if((region.srcSubresource.baseArrayLayer != 0) ||
    453 	   (region.dstSubresource.baseArrayLayer != 0) ||
    454 	   (region.srcSubresource.layerCount != 1) ||
    455 	   (region.dstSubresource.layerCount != 1) ||
    456 	   (srcFlags != dstFlags))
    457 	{
    458 		UNIMPLEMENTED();
    459 	}
    460 
    461 	int32_t numSlices = (region.srcOffsets[1].z - region.srcOffsets[0].z);
    462 	ASSERT(numSlices == (region.dstOffsets[1].z - region.dstOffsets[0].z));
    463 
    464 	sw::Surface* srcSurface = asSurface(srcFlags, region.srcSubresource.mipLevel, 0);
    465 	sw::Surface* dstSurface = Cast(dstImage)->asSurface(dstFlags, region.dstSubresource.mipLevel, 0);
    466 
    467 	sw::SliceRectF sRect(static_cast<float>(region.srcOffsets[0].x), static_cast<float>(region.srcOffsets[0].y),
    468 	                     static_cast<float>(region.srcOffsets[1].x), static_cast<float>(region.srcOffsets[1].y),
    469 	                     region.srcOffsets[0].z);
    470 
    471 	sw::SliceRect dRect(region.dstOffsets[0].x, region.dstOffsets[0].y,
    472 	                    region.dstOffsets[1].x, region.dstOffsets[1].y, region.dstOffsets[0].z);
    473 
    474 	for(int i = 0; i < numSlices; i++)
    475 	{
    476 		blitter->blit(srcSurface, sRect, dstSurface, dRect,
    477 		              {filter != VK_FILTER_NEAREST, srcFlags == VK_IMAGE_ASPECT_STENCIL_BIT, false});
    478 		sRect.slice++;
    479 		dRect.slice++;
    480 	}
    481 
    482 	delete srcSurface;
    483 	delete dstSurface;
    484 }
    485 
    486 VkFormat Image::getClearFormat() const
    487 {
    488 	// Set the proper format for the clear value, as described here:
    489 	// https://www.khronos.org/registry/vulkan/specs/1.1-extensions/html/vkspec.html#clears-values
    490 	if(sw::Surface::isSignedNonNormalizedInteger(format))
    491 	{
    492 		return VK_FORMAT_R32G32B32A32_SINT;
    493 	}
    494 	else if(sw::Surface::isUnsignedNonNormalizedInteger(format))
    495 	{
    496 		return VK_FORMAT_R32G32B32A32_UINT;
    497 	}
    498 
    499 	return VK_FORMAT_R32G32B32A32_SFLOAT;
    500 }
    501 
    502 uint32_t Image::getLastLayerIndex(const VkImageSubresourceRange& subresourceRange) const
    503 {
    504 	return ((subresourceRange.layerCount == VK_REMAINING_ARRAY_LAYERS) ?
    505 	        arrayLayers : (subresourceRange.baseArrayLayer + subresourceRange.layerCount)) - 1;
    506 }
    507 
    508 uint32_t Image::getLastMipLevel(const VkImageSubresourceRange& subresourceRange) const
    509 {
    510 	return ((subresourceRange.levelCount == VK_REMAINING_MIP_LEVELS) ?
    511 	        mipLevels : (subresourceRange.baseMipLevel + subresourceRange.levelCount)) - 1;
    512 }
    513 
    514 void Image::clear(void* pixelData, VkFormat format, const VkImageSubresourceRange& subresourceRange, VkImageAspectFlags aspectMask)
    515 {
    516 	uint32_t firstLayer = subresourceRange.baseArrayLayer;
    517 	uint32_t lastLayer = getLastLayerIndex(subresourceRange);
    518 	for(uint32_t layer = firstLayer; layer <= lastLayer; ++layer)
    519 	{
    520 		uint32_t lastLevel = getLastMipLevel(subresourceRange);
    521 		for(uint32_t mipLevel = subresourceRange.baseMipLevel; mipLevel <= lastLevel; ++mipLevel)
    522 		{
    523 			VkExtent3D mipLevelExtent = getMipLevelExtent(mipLevel);
    524 			for(uint32_t s = 0; s < mipLevelExtent.depth; ++s)
    525 			{
    526 				const sw::SliceRect dRect(0, 0, mipLevelExtent.width, mipLevelExtent.height, s);
    527 				sw::Surface* surface = asSurface(aspectMask, mipLevel, layer);
    528 				blitter->clear(pixelData, format, surface, dRect, 0xF);
    529 				delete surface;
    530 			}
    531 		}
    532 	}
    533 }
    534 
    535 void Image::clear(void* pixelData, VkFormat format, const VkRect2D& renderArea, const VkImageSubresourceRange& subresourceRange, VkImageAspectFlags aspectMask)
    536 {
    537 	if((subresourceRange.baseMipLevel != 0) ||
    538 	   (subresourceRange.levelCount != 1))
    539 	{
    540 		UNIMPLEMENTED();
    541 	}
    542 
    543 	sw::SliceRect dRect(renderArea.offset.x, renderArea.offset.y,
    544 			            renderArea.offset.x + renderArea.extent.width,
    545 			            renderArea.offset.y + renderArea.extent.height, 0);
    546 
    547 	uint32_t firstLayer = subresourceRange.baseArrayLayer;
    548 	uint32_t lastLayer = getLastLayerIndex(subresourceRange);
    549 	for(uint32_t layer = firstLayer; layer <= lastLayer; ++layer)
    550 	{
    551 		for(uint32_t s = 0; s < extent.depth; ++s)
    552 		{
    553 			dRect.slice = s;
    554 			sw::Surface* surface = asSurface(aspectMask, 0, layer);
    555 			blitter->clear(pixelData, format, surface, dRect, 0xF);
    556 			delete surface;
    557 		}
    558 	}
    559 }
    560 
    561 void Image::clear(const VkClearColorValue& color, const VkImageSubresourceRange& subresourceRange)
    562 {
    563 	if(!(subresourceRange.aspectMask == VK_IMAGE_ASPECT_COLOR_BIT))
    564 	{
    565 		UNIMPLEMENTED();
    566 	}
    567 
    568 	clear((void*)color.float32, getClearFormat(), subresourceRange, VK_IMAGE_ASPECT_COLOR_BIT);
    569 }
    570 
    571 void Image::clear(const VkClearDepthStencilValue& color, const VkImageSubresourceRange& subresourceRange)
    572 {
    573 	if((subresourceRange.aspectMask & ~(VK_IMAGE_ASPECT_DEPTH_BIT |
    574 	                                    VK_IMAGE_ASPECT_STENCIL_BIT)) != 0)
    575 	{
    576 		UNIMPLEMENTED();
    577 	}
    578 
    579 	if(subresourceRange.aspectMask & VK_IMAGE_ASPECT_DEPTH_BIT)
    580 	{
    581 		clear((void*)(&color.depth), VK_FORMAT_D32_SFLOAT, subresourceRange, VK_IMAGE_ASPECT_DEPTH_BIT);
    582 	}
    583 
    584 	if(subresourceRange.aspectMask & VK_IMAGE_ASPECT_STENCIL_BIT)
    585 	{
    586 		clear((void*)(&color.stencil), VK_FORMAT_S8_UINT, subresourceRange, VK_IMAGE_ASPECT_STENCIL_BIT);
    587 	}
    588 }
    589 
    590 void Image::clear(const VkClearValue& clearValue, const VkRect2D& renderArea, const VkImageSubresourceRange& subresourceRange)
    591 {
    592 	if(!((subresourceRange.aspectMask == VK_IMAGE_ASPECT_COLOR_BIT) ||
    593 	     (subresourceRange.aspectMask & (VK_IMAGE_ASPECT_DEPTH_BIT |
    594 	                                     VK_IMAGE_ASPECT_STENCIL_BIT))) ||
    595 	   (subresourceRange.baseMipLevel != 0) ||
    596 	   (subresourceRange.levelCount != 1))
    597 	{
    598 		UNIMPLEMENTED();
    599 	}
    600 
    601 	if(subresourceRange.aspectMask == VK_IMAGE_ASPECT_COLOR_BIT)
    602 	{
    603 		clear((void*)(clearValue.color.float32), getClearFormat(), renderArea, subresourceRange, VK_IMAGE_ASPECT_COLOR_BIT);
    604 	}
    605 	else
    606 	{
    607 		if(subresourceRange.aspectMask & VK_IMAGE_ASPECT_DEPTH_BIT)
    608 		{
    609 			clear((void*)(&clearValue.depthStencil.depth), VK_FORMAT_D32_SFLOAT, renderArea, subresourceRange, VK_IMAGE_ASPECT_DEPTH_BIT);
    610 		}
    611 
    612 		if(subresourceRange.aspectMask & VK_IMAGE_ASPECT_STENCIL_BIT)
    613 		{
    614 			clear((void*)(&clearValue.depthStencil.stencil), VK_FORMAT_S8_UINT, renderArea, subresourceRange, VK_IMAGE_ASPECT_STENCIL_BIT);
    615 		}
    616 	}
    617 }
    618 
    619 } // namespace vk