#include <metal_screenshotter.h>

Inheritance diagram for impeller::testing::MetalScreenshotter:

Public Member Functions
	MetalScreenshotter (const PlaygroundSwitches &switches)

std::unique_ptr< Screenshot >	MakeScreenshot (AiksContext &aiks_context, const std::shared_ptr< Texture > texture) override

PlaygroundImpl &	GetPlayground () override

Public Member Functions inherited from impeller::testing::Screenshotter
virtual	~Screenshotter ()=default

Detailed Description

Converts Pictures and DisplayLists to MetalScreenshots with the playground backend.

Definition at line 18 of file metal_screenshotter.h.

Constructor & Destructor Documentation

◆ MetalScreenshotter()

impeller::testing::MetalScreenshotter::MetalScreenshotter ( const PlaygroundSwitches & switches )

explicit

Definition at line 17 of file metal_screenshotter.mm.

                                                                          {
   FML_CHECK(::glfwInit() == GLFW_TRUE);
   playground_ = PlaygroundImpl::Create(PlaygroundBackend::kMetal, switches);
 }

References impeller::PlaygroundImpl::Create(), and impeller::kMetal.

Member Function Documentation

◆ GetPlayground()

PlaygroundImpl& impeller::testing::MetalScreenshotter::GetPlayground ( )

inlineoverridevirtual

Implements impeller::testing::Screenshotter.

Definition at line 26 of file metal_screenshotter.h.

26 { return *playground_; }

◆ MakeScreenshot()

std::unique_ptr< Screenshot > impeller::testing::MetalScreenshotter::MakeScreenshot	(	AiksContext &	aiks_context,
		const std::shared_ptr< Texture >	texture
	)

overridevirtual

Implements impeller::testing::Screenshotter.

Definition at line 22 of file metal_screenshotter.mm.

                                           {
   @autoreleasepool {
     std::shared_ptr<Context> context = aiks_context.GetContext();
     fml::AutoResetWaitableEvent latch;
     if (auto cmd_buffer = context->CreateCommandBuffer()) {
       if (context->GetCommandQueue()
               ->Submit({cmd_buffer},
                        [&latch](CommandBuffer::Status status) {
                          FML_CHECK(status == CommandBuffer::Status::kCompleted);
                          latch.Signal();
                        })
               .ok()) {
         latch.Wait();
       }
     }
  
     id<MTLTexture> metal_texture =
         std::static_pointer_cast<TextureMTL>(texture)->GetMTLTexture();
  
     CGColorSpaceRef color_space = CGColorSpaceCreateDeviceRGB();
     CIImage* ciImage = [[CIImage alloc]
         initWithMTLTexture:metal_texture
                    options:@{kCIImageColorSpace : (__bridge id)color_space}];
     CGColorSpaceRelease(color_space);
     FML_CHECK(ciImage);
  
     std::shared_ptr<ContextMTL> context_mtl =
         std::static_pointer_cast<ContextMTL>(context);
     CIContext* cicontext =
         [CIContext contextWithMTLDevice:context_mtl->GetMTLDevice()];
     FML_CHECK(context);
  
     CIImage* flipped = [ciImage
         imageByApplyingOrientation:kCGImagePropertyOrientationDownMirrored];
  
     CGImageRef cgImage = [cicontext createCGImage:flipped
                                          fromRect:[flipped extent]];
  
     // NOLINTNEXTLINE(clang-analyzer-cplusplus.NewDeleteLeaks)
     return std::unique_ptr<MetalScreenshot>(new MetalScreenshot(cgImage));
   }
 }

References impeller::AiksContext::GetContext().

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