flutter::GPUSurfaceMetalImpeller Class Reference

#include <gpu_surface_metal_impeller.h>

Inheritance diagram for flutter::GPUSurfaceMetalImpeller:

Public Member Functions
	GPUSurfaceMetalImpeller (GPUSurfaceMetalDelegate *delegate, const std::shared_ptr< impeller::AiksContext > &context, bool render_to_surface=true)
	~GPUSurfaceMetalImpeller ()
bool	IsValid () override
virtual Surface::SurfaceData	GetSurfaceData () const override
Public Member Functions inherited from flutter::Surface
	Surface ()
virtual	~Surface ()
virtual bool	ClearRenderContext ()

Detailed Description

Definition at line 20 of file gpu_surface_metal_impeller.h.

Constructor & Destructor Documentation

GPUSurfaceMetalImpeller()

flutter::GPUSurfaceMetalImpeller::GPUSurfaceMetalImpeller	(	GPUSurfaceMetalDelegate *	delegate,
		const std::shared_ptr< impeller::AiksContext > &	context,
		bool	render_to_surface = true
	)

Definition at line 26 of file gpu_surface_metal_impeller.mm.

    : delegate_(delegate),
      render_target_type_(delegate->GetRenderTargetType()),
      aiks_context_(context),
      render_to_surface_(render_to_surface) {
  // If this preference is explicitly set, we allow for disabling partial repaint.
  NSNumber* disablePartialRepaint =
      [[NSBundle mainBundle] objectForInfoDictionaryKey:@"FLTDisablePartialRepaint"];
  if (disablePartialRepaint != nil) {
    disable_partial_repaint_ = disablePartialRepaint.boolValue;
  }
  if (aiks_context_) {
    swapchain_transients_ = std::make_shared<impeller::SwapchainTransientsMTL>(
        aiks_context_->GetContext()->GetResourceAllocator());
  }
}

~GPUSurfaceMetalImpeller()

flutter::GPUSurfaceMetalImpeller::~GPUSurfaceMetalImpeller ( )

default

Member Function Documentation

GetSurfaceData()

Surface::SurfaceData flutter::GPUSurfaceMetalImpeller::GetSurfaceData ( ) const

overridevirtual

Capture the SurfaceData currently present in the surface.

Not guaranteed to work on all setups and not intended to be used in production. The data field will be null if it was unable to work.

Reimplemented from flutter::Surface.

Definition at line 381 of file gpu_surface_metal_impeller.mm.

                                                                 {
  if (!(last_texture_ && [last_texture_ conformsToProtocol:@protocol(MTLTexture)])) {
    return {};
  }
  id<MTLTexture> texture = last_texture_;
  int bytesPerPixel = 0;
  std::string pixel_format;
  switch (texture.pixelFormat) {
    case MTLPixelFormatBGR10_XR:
      bytesPerPixel = 4;
      pixel_format = "MTLPixelFormatBGR10_XR";
      break;
    case MTLPixelFormatBGRA10_XR:
      bytesPerPixel = 8;
      pixel_format = "MTLPixelFormatBGRA10_XR";
      break;
    case MTLPixelFormatBGRA8Unorm:
      bytesPerPixel = 4;
      pixel_format = "MTLPixelFormatBGRA8Unorm";
      break;
    case MTLPixelFormatRGBA16Float:
      bytesPerPixel = 8;
      pixel_format = "MTLPixelFormatRGBA16Float";
      break;
    default:
      return {};
  }
 
  // Zero initialized so that errors are easier to find at the cost of
  // performance.
  sk_sp<SkData> result =
      SkData::MakeZeroInitialized(texture.width * texture.height * bytesPerPixel);
  [texture getBytes:result->writable_data()
        bytesPerRow:texture.width * bytesPerPixel
         fromRegion:MTLRegionMake2D(0, 0, texture.width, texture.height)
        mipmapLevel:0];
  return {
      .pixel_format = pixel_format,
      .data = result,
  };
}

References texture.

IsValid()

bool flutter::GPUSurfaceMetalImpeller::IsValid ( )

overridevirtual

Implements flutter::Surface.

Definition at line 49 of file gpu_surface_metal_impeller.mm.

                                      {
  return !!aiks_context_ && aiks_context_->IsValid();
}

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

• shell/gpu/gpu_surface_metal_impeller.h
• shell/gpu/gpu_surface_metal_impeller.mm