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// 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 "VkImageView.hpp"
#include "VkImage.hpp"
namespace
{
VkComponentMapping ResolveComponentMapping(VkComponentMapping m, vk::Format format)
{
m = vk::ResolveIdentityMapping(m);
// Replace non-present components with zero/one swizzles so that the sampler
// will give us correct interactions between channel replacement and texel replacement,
// where we've had to invent new channels behind the app's back (eg transparent decompression
// of ETC2 RGB -> BGRA8)
VkComponentSwizzle table[] = {
VK_COMPONENT_SWIZZLE_IDENTITY,
VK_COMPONENT_SWIZZLE_ZERO,
VK_COMPONENT_SWIZZLE_ONE,
VK_COMPONENT_SWIZZLE_R,
format.componentCount() < 2 ? VK_COMPONENT_SWIZZLE_ZERO : VK_COMPONENT_SWIZZLE_G,
format.componentCount() < 3 ? VK_COMPONENT_SWIZZLE_ZERO : VK_COMPONENT_SWIZZLE_B,
format.componentCount() < 4 ? VK_COMPONENT_SWIZZLE_ONE : VK_COMPONENT_SWIZZLE_A,
};
return {table[m.r], table[m.g], table[m.b], table[m.a]};
}
VkImageSubresourceRange ResolveRemainingLevelsLayers(VkImageSubresourceRange range, const vk::Image *image)
{
return {
range.aspectMask,
range.baseMipLevel,
(range.levelCount == VK_REMAINING_MIP_LEVELS) ? (image->getMipLevels() - range.baseMipLevel) : range.levelCount,
range.baseArrayLayer,
(range.layerCount == VK_REMAINING_ARRAY_LAYERS) ? (image->getArrayLayers() - range.baseArrayLayer) : range.layerCount,
};
}
}
namespace vk
{
std::atomic<uint32_t> ImageView::nextID(1);
ImageView::ImageView(const VkImageViewCreateInfo* pCreateInfo, void* mem, const vk::SamplerYcbcrConversion *ycbcrConversion) :
image(vk::Cast(pCreateInfo->image)), viewType(pCreateInfo->viewType), format(pCreateInfo->format),
components(ResolveComponentMapping(pCreateInfo->components, format)),
subresourceRange(ResolveRemainingLevelsLayers(pCreateInfo->subresourceRange, image)),
ycbcrConversion(ycbcrConversion)
{
}
size_t ImageView::ComputeRequiredAllocationSize(const VkImageViewCreateInfo* pCreateInfo)
{
return 0;
}
void ImageView::destroy(const VkAllocationCallbacks* pAllocator)
{
}
bool ImageView::imageTypesMatch(VkImageType imageType) const
{
uint32_t imageArrayLayers = image->getArrayLayers();
switch(viewType)
{
case VK_IMAGE_VIEW_TYPE_1D:
return (imageType == VK_IMAGE_TYPE_1D) &&
(subresourceRange.layerCount == 1);
case VK_IMAGE_VIEW_TYPE_1D_ARRAY:
return imageType == VK_IMAGE_TYPE_1D;
case VK_IMAGE_VIEW_TYPE_2D:
return ((imageType == VK_IMAGE_TYPE_2D) ||
((imageType == VK_IMAGE_TYPE_3D) &&
(imageArrayLayers == 1))) &&
(subresourceRange.layerCount == 1);
case VK_IMAGE_VIEW_TYPE_2D_ARRAY:
return (imageType == VK_IMAGE_TYPE_2D) ||
((imageType == VK_IMAGE_TYPE_3D) &&
(imageArrayLayers == 1));
case VK_IMAGE_VIEW_TYPE_CUBE:
return image->isCube() &&
(imageArrayLayers >= subresourceRange.layerCount) &&
(subresourceRange.layerCount == 6);
case VK_IMAGE_VIEW_TYPE_CUBE_ARRAY:
return image->isCube() &&
(imageArrayLayers >= subresourceRange.layerCount) &&
(subresourceRange.layerCount >= 6);
case VK_IMAGE_VIEW_TYPE_3D:
return (imageType == VK_IMAGE_TYPE_3D) &&
(imageArrayLayers == 1) &&
(subresourceRange.layerCount == 1);
default:
UNREACHABLE("Unexpected viewType %d", (int)viewType);
}
return false;
}
void ImageView::clear(const VkClearValue& clearValue, const VkImageAspectFlags aspectMask, const VkRect2D& renderArea)
{
// Note: clearing ignores swizzling, so components is ignored.
if(!imageTypesMatch(image->getImageType()))
{
UNIMPLEMENTED("imageTypesMatch");
}
if(!format.isCompatible(image->getFormat()))
{
UNIMPLEMENTED("incompatible formats");
}
VkImageSubresourceRange sr = subresourceRange;
sr.aspectMask = aspectMask;
image->clear(clearValue, format, renderArea, sr);
}
void ImageView::clear(const VkClearValue& clearValue, const VkImageAspectFlags aspectMask, const VkClearRect& renderArea)
{
// Note: clearing ignores swizzling, so components is ignored.
if(!imageTypesMatch(image->getImageType()))
{
UNIMPLEMENTED("imageTypesMatch");
}
if(!format.isCompatible(image->getFormat()))
{
UNIMPLEMENTED("incompatible formats");
}
VkImageSubresourceRange sr;
sr.aspectMask = aspectMask;
sr.baseMipLevel = subresourceRange.baseMipLevel;
sr.levelCount = subresourceRange.levelCount;
sr.baseArrayLayer = renderArea.baseArrayLayer + subresourceRange.baseArrayLayer;
sr.layerCount = renderArea.layerCount;
image->clear(clearValue, format, renderArea.rect, sr);
}
void ImageView::resolve(ImageView* resolveAttachment, int layer)
{
if((subresourceRange.levelCount != 1) || (resolveAttachment->subresourceRange.levelCount != 1))
{
UNIMPLEMENTED("levelCount");
}
VkImageCopy region;
region.srcSubresource =
{
subresourceRange.aspectMask,
subresourceRange.baseMipLevel,
subresourceRange.baseArrayLayer + layer,
1
};
region.srcOffset = { 0, 0, 0 };
region.dstSubresource =
{
resolveAttachment->subresourceRange.aspectMask,
resolveAttachment->subresourceRange.baseMipLevel,
resolveAttachment->subresourceRange.baseArrayLayer + layer,
1
};
region.dstOffset = { 0, 0, 0 };
region.extent = image->getMipLevelExtent(static_cast<VkImageAspectFlagBits>(subresourceRange.aspectMask),
subresourceRange.baseMipLevel);
image->copyTo(resolveAttachment->image, region);
}
void ImageView::resolve(ImageView* resolveAttachment)
{
if((subresourceRange.levelCount != 1) || (resolveAttachment->subresourceRange.levelCount != 1))
{
UNIMPLEMENTED("levelCount");
}
VkImageCopy region;
region.srcSubresource =
{
subresourceRange.aspectMask,
subresourceRange.baseMipLevel,
subresourceRange.baseArrayLayer,
subresourceRange.layerCount
};
region.srcOffset = { 0, 0, 0 };
region.dstSubresource =
{
resolveAttachment->subresourceRange.aspectMask,
resolveAttachment->subresourceRange.baseMipLevel,
resolveAttachment->subresourceRange.baseArrayLayer,
resolveAttachment->subresourceRange.layerCount
};
region.dstOffset = { 0, 0, 0 };
region.extent = image->getMipLevelExtent(static_cast<VkImageAspectFlagBits>(subresourceRange.aspectMask),
subresourceRange.baseMipLevel);
image->copyTo(resolveAttachment->image, region);
}
const Image* ImageView::getImage(Usage usage) const
{
switch(usage)
{
case RAW:
return image;
case SAMPLING:
return image->getSampledImage(format);
default:
UNIMPLEMENTED("usage %d", int(usage));
return nullptr;
}
}
Format ImageView::getFormat(Usage usage) const
{
return ((usage == RAW) || (getImage(usage) == image)) ? format : getImage(usage)->getFormat();
}
int ImageView::rowPitchBytes(VkImageAspectFlagBits aspect, uint32_t mipLevel, Usage usage) const
{
return getImage(usage)->rowPitchBytes(aspect, subresourceRange.baseMipLevel + mipLevel);
}
int ImageView::slicePitchBytes(VkImageAspectFlagBits aspect, uint32_t mipLevel, Usage usage) const
{
return getImage(usage)->slicePitchBytes(aspect, subresourceRange.baseMipLevel + mipLevel);
}
int ImageView::layerPitchBytes(VkImageAspectFlagBits aspect, Usage usage) const
{
return static_cast<int>(getImage(usage)->getLayerSize(aspect));
}
VkExtent3D ImageView::getMipLevelExtent(uint32_t mipLevel) const
{
return image->getMipLevelExtent(static_cast<VkImageAspectFlagBits>(subresourceRange.aspectMask),
subresourceRange.baseMipLevel + mipLevel);
}
void *ImageView::getOffsetPointer(const VkOffset3D& offset, VkImageAspectFlagBits aspect, uint32_t mipLevel, uint32_t layer, Usage usage) const
{
ASSERT(mipLevel < subresourceRange.levelCount);
VkImageSubresourceLayers imageSubresourceLayers =
{
static_cast<VkImageAspectFlags>(aspect),
subresourceRange.baseMipLevel + mipLevel,
subresourceRange.baseArrayLayer + layer,
subresourceRange.layerCount
};
return getImage(usage)->getTexelPointer(offset, imageSubresourceLayers);
}
}