#include <texture_source_vk.h>

Inheritance diagram for impeller::TextureSourceVK:

Public Member Functions
virtual	~TextureSourceVK ()

const TextureDescriptor &	GetTextureDescriptor () const

virtual vk::Image	GetImage () const =0

virtual vk::ImageView	GetImageView () const =0

fml::Status	SetLayout (const BarrierVK &barrier) const

vk::ImageLayout	SetLayoutWithoutEncoding (vk::ImageLayout layout) const

vk::ImageLayout	GetLayout () const

Protected Member Functions
	TextureSourceVK (TextureDescriptor desc)

Protected Attributes
const TextureDescriptor	desc_

Detailed Description

Abstract base class that represents a vkImage and an vkImageView.

This is intended to be used with an impeller::TextureVK. Example implementations represent swapchain images or uploaded textures.

Definition at line 21 of file texture_source_vk.h.

Constructor & Destructor Documentation

◆ ~TextureSourceVK()

impeller::TextureSourceVK::~TextureSourceVK ( )

virtualdefault

◆ TextureSourceVK()

impeller::TextureSourceVK::TextureSourceVK ( TextureDescriptor desc )

explicitprotected

Definition at line 9 of file texture_source_vk.cc.

9 : desc_(desc) {}

Member Function Documentation

◆ GetImage()

virtual vk::Image impeller::TextureSourceVK::GetImage ( ) const

pure virtual

Implemented in impeller::AllocatedTextureSourceVK, and impeller::SwapchainImageVK.

Referenced by SetLayout().

◆ GetImageView()

virtual vk::ImageView impeller::TextureSourceVK::GetImageView ( ) const

pure virtual

Implemented in impeller::AllocatedTextureSourceVK, and impeller::SwapchainImageVK.

◆ GetLayout()

vk::ImageLayout impeller::TextureSourceVK::GetLayout ( ) const

Get the last layout assigned to the TextureSourceVK.

This value is synchronized with the GPU via SetLayout so it may not reflect the actual layout.

Definition at line 17 of file texture_source_vk.cc.

                                                {
   ReaderLock lock(layout_mutex_);
   return layout_;
 }

◆ GetTextureDescriptor()

const TextureDescriptor & impeller::TextureSourceVK::GetTextureDescriptor ( ) const

Definition at line 13 of file texture_source_vk.cc.

                                                                      {
   return desc_;
 }

References desc_.

◆ SetLayout()

fml::Status impeller::TextureSourceVK::SetLayout ( const BarrierVK & barrier ) const

Encodes the layout transition barrier to barrier.cmd_buffer for the image.

The transition is from the layout stored via SetLayoutWithoutEncoding to barrier.new_layout.

Definition at line 30 of file texture_source_vk.cc.

                                                                    {
   const auto old_layout = SetLayoutWithoutEncoding(barrier.new_layout);
   if (barrier.new_layout == old_layout) {
     return {};
   }
  
   vk::ImageMemoryBarrier image_barrier;
   image_barrier.srcAccessMask = barrier.src_access;
   image_barrier.dstAccessMask = barrier.dst_access;
   image_barrier.oldLayout = old_layout;
   image_barrier.newLayout = barrier.new_layout;
   image_barrier.image = GetImage();
   image_barrier.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
   image_barrier.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
   image_barrier.subresourceRange.aspectMask = ToImageAspectFlags(desc_.format);
   image_barrier.subresourceRange.baseMipLevel = 0u;
   image_barrier.subresourceRange.levelCount = desc_.mip_count;
   image_barrier.subresourceRange.baseArrayLayer = 0u;
   image_barrier.subresourceRange.layerCount = ToArrayLayerCount(desc_.type);
  
   barrier.cmd_buffer.pipelineBarrier(barrier.src_stage,  // src stage
                                      barrier.dst_stage,  // dst stage
                                      {},                 // dependency flags
                                      nullptr,            // memory barriers
                                      nullptr,            // buffer barriers
                                      image_barrier       // image barriers
   );
  
   return {};
 }

References impeller::BarrierVK::cmd_buffer, desc_, impeller::BarrierVK::dst_access, impeller::BarrierVK::dst_stage, impeller::TextureDescriptor::format, GetImage(), impeller::TextureDescriptor::mip_count, impeller::BarrierVK::new_layout, SetLayoutWithoutEncoding(), impeller::BarrierVK::src_access, impeller::BarrierVK::src_stage, impeller::ToArrayLayerCount(), impeller::ToImageAspectFlags(), and impeller::TextureDescriptor::type.

◆ SetLayoutWithoutEncoding()

vk::ImageLayout impeller::TextureSourceVK::SetLayoutWithoutEncoding ( vk::ImageLayout layout ) const

Store the layout of the image.

This just is bookkeeping on the CPU, to actually set the layout use SetLayout.

Parameters

layout The new layout.

Returns: The old layout.

Definition at line 22 of file texture_source_vk.cc.

                                 {
   WriterLock lock(layout_mutex_);
   const auto old_layout = layout_;
   layout_ = layout;
   return old_layout;
 }

Referenced by SetLayout().

Member Data Documentation

◆ desc_

const TextureDescriptor impeller::TextureSourceVK::desc_

protected

Definition at line 54 of file texture_source_vk.h.

Referenced by impeller::SwapchainImageVK::GetPixelFormat(), impeller::SwapchainImageVK::GetSize(), GetTextureDescriptor(), and SetLayout().

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

impeller/renderer/backend/vulkan/texture_source_vk.h
impeller/renderer/backend/vulkan/texture_source_vk.cc

Public Member Functions

Protected Member Functions

Protected Attributes