impeller::AllocatedTextureSourceVK Class Reference

Inheritance diagram for impeller::AllocatedTextureSourceVK:

Public Member Functions
	AllocatedTextureSourceVK (std::weak_ptr< ResourceManagerVK > resource_manager, const TextureDescriptor &desc, VmaAllocator allocator, vk::Device device, bool supports_memoryless_textures, bool supports_framebuffer_fetch)
	~AllocatedTextureSourceVK ()=default
bool	IsValid () const
vk::Image	GetImage () const override
vk::ImageView	GetImageView () const override
Public Member Functions inherited from impeller::TextureSourceVK
virtual	~TextureSourceVK ()
const TextureDescriptor &	GetTextureDescriptor () const
fml::Status	SetLayout (const BarrierVK &barrier) const
vk::ImageLayout	SetLayoutWithoutEncoding (vk::ImageLayout layout) const
vk::ImageLayout	GetLayout () const

Additional Inherited Members
Protected Member Functions inherited from impeller::TextureSourceVK
	TextureSourceVK (TextureDescriptor desc)
Protected Attributes inherited from impeller::TextureSourceVK
const TextureDescriptor	desc_

Detailed Description

Definition at line 264 of file allocator_vk.cc.

Constructor & Destructor Documentation

AllocatedTextureSourceVK()

impeller::AllocatedTextureSourceVK::AllocatedTextureSourceVK ( std::weak_ptr< ResourceManagerVK >  resource_manager, const TextureDescriptor &  desc, VmaAllocator  allocator, vk::Device  device, bool  supports_memoryless_textures, bool  supports_framebuffer_fetch  )

inline

Definition at line 266 of file allocator_vk.cc.

      : TextureSourceVK(desc), resource_(std::move(resource_manager)) {
    FML_DCHECK(desc.format != PixelFormat::kUnknown);
    vk::ImageCreateInfo image_info;
    image_info.flags = ToVKImageCreateFlags(desc.type);
    image_info.imageType = vk::ImageType::e2D;
    image_info.format = ToVKImageFormat(desc.format);
    image_info.extent = VkExtent3D{
        static_cast<uint32_t>(desc.size.width),   // width
        static_cast<uint32_t>(desc.size.height),  // height
        1u                                        // depth
    };
    image_info.samples = ToVKSampleCount(desc.sample_count);
    image_info.mipLevels = desc.mip_count;
    image_info.arrayLayers = ToArrayLayerCount(desc.type);
    image_info.tiling = vk::ImageTiling::eOptimal;
    image_info.initialLayout = vk::ImageLayout::eUndefined;
    image_info.usage = ToVKImageUsageFlags(
        desc.format, desc.usage, desc.storage_mode,
        supports_memoryless_textures, supports_framebuffer_fetch);
    image_info.sharingMode = vk::SharingMode::eExclusive;
 
    VmaAllocationCreateInfo alloc_nfo = {};
 
    alloc_nfo.usage = ToVMAMemoryUsage();
    alloc_nfo.preferredFlags =
        static_cast<VkMemoryPropertyFlags>(ToVKTextureMemoryPropertyFlags(
            desc.storage_mode, supports_memoryless_textures));
    alloc_nfo.flags = ToVmaAllocationCreateFlags(desc.storage_mode);
 
    auto create_info_native =
        static_cast<vk::ImageCreateInfo::NativeType>(image_info);
 
    VkImage vk_image = VK_NULL_HANDLE;
    VmaAllocation allocation = {};
    VmaAllocationInfo allocation_info = {};
    {
      auto result = vk::Result{::vmaCreateImage(allocator,            //
                                                &create_info_native,  //
                                                &alloc_nfo,           //
                                                &vk_image,            //
                                                &allocation,          //
                                                &allocation_info      //
                                                )};
      if (result != vk::Result::eSuccess) {
        VALIDATION_LOG << "Unable to allocate Vulkan Image: "
                       << vk::to_string(result)
                       << " Type: " << TextureTypeToString(desc.type)
                       << " Mode: " << StorageModeToString(desc.storage_mode)
                       << " Usage: " << TextureUsageMaskToString(desc.usage)
                       << " [VK]Flags: " << vk::to_string(image_info.flags)
                       << " [VK]Format: " << vk::to_string(image_info.format)
                       << " [VK]Usage: " << vk::to_string(image_info.usage)
                       << " [VK]Mem. Flags: "
                       << vk::to_string(vk::MemoryPropertyFlags(
                              alloc_nfo.preferredFlags));
        return;
      }
    }
 
    auto image = vk::Image{vk_image};
 
    vk::ImageViewCreateInfo view_info = {};
    view_info.image = image;
    view_info.viewType = ToVKImageViewType(desc.type);
    view_info.format = image_info.format;
    view_info.subresourceRange.aspectMask = ToVKImageAspectFlags(desc.format);
    view_info.subresourceRange.levelCount = image_info.mipLevels;
    view_info.subresourceRange.layerCount = ToArrayLayerCount(desc.type);
 
    // Vulkan does not have an image format that is equivalent to
    // `MTLPixelFormatA8Unorm`, so we use `R8Unorm` instead. Given that the
    // shaders expect that alpha channel to be set in the cases, we swizzle.
    // See: https://github.com/flutter/flutter/issues/115461 for more details.
    if (desc.format == PixelFormat::kA8UNormInt) {
      view_info.components.a = vk::ComponentSwizzle::eR;
      view_info.components.r = vk::ComponentSwizzle::eA;
    }
 
    auto [result, image_view] = device.createImageViewUnique(view_info);
    if (result != vk::Result::eSuccess) {
      VALIDATION_LOG << "Unable to create an image view for allocation: "
                     << vk::to_string(result);
      return;
    }
    resource_.Swap(ImageResource(ImageVMA{allocator, allocation, image},
                                 std::move(image_view)));
    is_valid_ = true;
  }

References impeller::TextureDescriptor::format, impeller::TSize< T >::height, impeller::TextureDescriptor::mip_count, impeller::TextureDescriptor::sample_count, impeller::TextureDescriptor::size, impeller::TextureDescriptor::storage_mode, impeller::StorageModeToString(), impeller::TextureTypeToString(), impeller::TextureUsageMaskToString(), impeller::ToArrayLayerCount(), impeller::ToVKImageAspectFlags(), impeller::ToVKImageCreateFlags(), impeller::ToVKImageFormat(), impeller::ToVKImageUsageFlags(), impeller::ToVKImageViewType(), impeller::ToVKSampleCount(), impeller::ToVKTextureMemoryPropertyFlags(), impeller::ToVmaAllocationCreateFlags(), impeller::ToVMAMemoryUsage(), impeller::TextureDescriptor::type, impeller::TextureDescriptor::usage, VALIDATION_LOG, and impeller::TSize< T >::width.

~AllocatedTextureSourceVK()

impeller::AllocatedTextureSourceVK::~AllocatedTextureSourceVK ( )

default

Member Function Documentation

GetImage()

vk::Image impeller::AllocatedTextureSourceVK::GetImage ( ) const

inlineoverridevirtual

Implements impeller::TextureSourceVK.

Definition at line 365 of file allocator_vk.cc.

{ return resource_->image.get().image; }

GetImageView()

vk::ImageView impeller::AllocatedTextureSourceVK::GetImageView ( ) const

inlineoverridevirtual

Implements impeller::TextureSourceVK.

Definition at line 367 of file allocator_vk.cc.

                                            {
    return resource_->image_view.get();
  }

IsValid()

bool impeller::AllocatedTextureSourceVK::IsValid ( ) const

inline

Definition at line 363 of file allocator_vk.cc.

{ return is_valid_; }

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The documentation for this class was generated from the following file:

• impeller/renderer/backend/vulkan/allocator_vk.cc