| Flutter Impeller |

Public Types | Public Member Functions | Static Public Member Functions | List of all members
impeller::SurfaceVK Class Referencefinal

`#include <surface_vk.h>`

Inheritance diagram for impeller::SurfaceVK:

## Public Types
using | SwapCallback = std::function< bool(void)>

## Public Member Functions
| ~SurfaceVK () override
Public Member Functions inherited from impeller::Surface
| Surface ()
| Surface (const RenderTarget &target_desc)
virtual | ~Surface ()
const ISize & | GetSize () const
bool | IsValid () const
const RenderTarget & | GetTargetRenderPassDescriptor () const

## Static Public Member Functions
static std::unique_ptr< SurfaceVK > | WrapSwapchainImage (const std::shared_ptr< Context > &context, std::shared_ptr< SwapchainImageVK > &swapchain_image, SwapCallback swap_callback)

## Detailed Description

Definition at line 17 of file surface_vk.h.

## Member Typedef Documentation

## ◆ SwapCallback

using impeller::SurfaceVK::SwapCallback = std::function<bool(void)>

Definition at line 19 of file surface_vk.h.

## Constructor & Destructor Documentation

## ◆ ~SurfaceVK()

impeller::SurfaceVK::~SurfaceVK | ( |  | ) |
| override default

## Member Function Documentation

## ◆ WrapSwapchainImage()

std::unique_ptr< SurfaceVK > impeller::SurfaceVK::WrapSwapchainImage | ( | const std::shared_ptr< Context > & | context,
|  | std::shared_ptr< SwapchainImageVK > & | swapchain_image,
|  | SwapCallback | swap_callback
| ) |  |
| static

Definition at line 13 of file surface_vk.cc.

16 {
17 if (!context || !swapchain_image || !swap_callback) {
18 return nullptr;
19 }
20
21 TextureDescriptor msaa_tex_desc;
22 msaa_tex_desc.storage_mode = StorageMode::kDeviceTransient;
23 msaa_tex_desc.type = TextureType::kTexture2DMultisample;
24 msaa_tex_desc.sample_count = SampleCount::kCount4;
25 msaa_tex_desc.format = swapchain_image->GetPixelFormat();
26 msaa_tex_desc.size = swapchain_image->GetSize();
27 msaa_tex_desc.usage = static_cast<uint64_t>(TextureUsage::kRenderTarget);
28
29 std::shared_ptr<Texture> msaa_tex;
30 if (!swapchain_image->HasMSAATexture()) {
31 msaa_tex = context->GetResourceAllocator()->CreateTexture(msaa_tex_desc);
32 msaa_tex->SetLabel("ImpellerOnscreenColorMSAA");
33 if (!msaa_tex) {
34 VALIDATION_LOG << "Could not allocate MSAA color texture.";
35 return nullptr;
36 }
37 swapchain_image->SetMSAATexture(msaa_tex);
38 } else {
39 msaa_tex = swapchain_image->GetMSAATexture();
40 }
41
42 TextureDescriptor resolve_tex_desc;
43 resolve_tex_desc.type = TextureType::kTexture2D;
44 resolve_tex_desc.format = swapchain_image->GetPixelFormat();
45 resolve_tex_desc.size = swapchain_image->GetSize();
46 resolve_tex_desc.usage =
47 static_cast<TextureUsageMask>(TextureUsage::kRenderTarget);
48 resolve_tex_desc.sample_count = SampleCount::kCount1;
49 resolve_tex_desc.storage_mode = StorageMode::kDevicePrivate;
50
51 std::shared_ptr<Texture> resolve_tex =
52 std::make_shared<TextureVK>(context, //
53 swapchain_image //
54 );
55
56 if (!resolve_tex) {
57 VALIDATION_LOG << "Could not wrap resolve texture.";
58 return nullptr;
59 }
60 resolve_tex->SetLabel("ImpellerOnscreenResolve");
61
62 ColorAttachment color0;
63 color0.texture = msaa_tex;
64 color0.clear_color = Color::DarkSlateGray();
65 color0.load_action = LoadAction::kClear;
66 color0.store_action = StoreAction::kMultisampleResolve;
67 color0.resolve_texture = resolve_tex;
68
69 RenderTarget render_target_desc;
70 render_target_desc.SetColorAttachment(color0, 0u);
71
72 // The constructor is private. So make_unique may not be used.
73 return std::unique_ptr<SurfaceVK>(
74 new SurfaceVK(render_target_desc, std::move(swap_callback)));
75 }

References impeller::ColorAttachment::clear_color, impeller::Color::DarkSlateGray(), impeller::TextureDescriptor::format, impeller::kClear, impeller::kCount1, impeller::kCount4, impeller::kDevicePrivate, impeller::kDeviceTransient, impeller::kMultisampleResolve, impeller::kRenderTarget, impeller::kTexture2D, impeller::kTexture2DMultisample, impeller::Attachment::load_action, impeller::Attachment::resolve_texture, impeller::TextureDescriptor::sample_count, impeller::RenderTarget::SetColorAttachment(), impeller::TextureDescriptor::size, impeller::TextureDescriptor::storage_mode, impeller::Attachment::store_action, impeller::Attachment::texture, impeller::TextureDescriptor::type, impeller::TextureDescriptor::usage, and VALIDATION_LOG.

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

- impeller/renderer/backend/vulkan/surface_vk.h
- impeller/renderer/backend/vulkan/surface_vk.cc

impeller::StoreAction::kMultisampleResolve
@ kMultisampleResolve
impeller::TextureUsageMask
uint64_t TextureUsageMask
Definition: formats.h:295
impeller::TextureUsage::kRenderTarget
@ kRenderTarget
impeller::TextureType::kTexture2DMultisample
@ kTexture2DMultisample
impeller::Color::DarkSlateGray
static constexpr Color DarkSlateGray()
Definition: color.h:410
impeller::LoadAction::kClear
@ kClear
impeller::StorageMode::kDeviceTransient
@ kDeviceTransient
impeller::StorageMode::kDevicePrivate
@ kDevicePrivate
impeller::TextureType::kTexture2D
@ kTexture2D
VALIDATION_LOG
#define VALIDATION_LOG
Definition: validation.h:67
impeller::SampleCount::kCount1
@ kCount1
impeller::SampleCount::kCount4
@ kCount4