impeller::Renderer Class Reference

#include <renderer.h>

Public Types
using	RenderCallback = std::function< bool(RenderTarget &render_target)>

Public Member Functions
	Renderer (std::shared_ptr< Context > context, size_t max_frames_in_flight=kDefaultMaxFramesInFlight)
	~Renderer ()
bool	IsValid () const
bool	Render (std::unique_ptr< Surface > surface, const RenderCallback &callback) const
std::shared_ptr< Context >	GetContext () const

Static Public Attributes
static constexpr size_t	kDefaultMaxFramesInFlight = 3u

Detailed Description

Definition at line 19 of file renderer.h.

Member Typedef Documentation

RenderCallback

using impeller::Renderer::RenderCallback = std::function<bool(RenderTarget& render_target)>

Definition at line 23 of file renderer.h.

Constructor & Destructor Documentation

Renderer()

impeller::Renderer::Renderer ( std::shared_ptr< Context >  context, size_t  max_frames_in_flight = kDefaultMaxFramesInFlight  )

explicit

Definition at line 15 of file renderer.cc.

    : frames_in_flight_sema_(std::make_shared<fml::Semaphore>(
          std::max<std::size_t>(1u, max_frames_in_flight))),
      context_(std::move(context)) {
  if (!context_ || !context_->IsValid()) {
    return;
  }
 
  is_valid_ = true;
}

~Renderer()

impeller::Renderer::~Renderer ( )

default

Member Function Documentation

GetContext()

std::shared_ptr< Context > impeller::Renderer::GetContext

(

)

const

Definition at line 61 of file renderer.cc.

                                                  {
  return context_;
}

IsValid()

bool impeller::Renderer::IsValid

(

)

const

Definition at line 29 of file renderer.cc.

                             {
  return is_valid_;
}

Render()

bool impeller::Renderer::Render	(	std::unique_ptr< Surface >	surface,
		const RenderCallback &	callback
	)		const

Definition at line 33 of file renderer.cc.

                                                                   {
  TRACE_EVENT0("impeller", "Renderer::Render");
  if (!IsValid()) {
    return false;
  }
 
  if (!surface || !surface->IsValid()) {
    return false;
  }
 
  RenderTarget render_target = surface->GetTargetRenderPassDescriptor();
 
  if (render_callback && !render_callback(render_target)) {
    return false;
  }
 
  if (!frames_in_flight_sema_->Wait()) {
    return false;
  }
 
  const auto present_result = surface->Present();
 
  frames_in_flight_sema_->Signal();
 
  return present_result;
}

Member Data Documentation

kDefaultMaxFramesInFlight

constexpr size_t impeller::Renderer::kDefaultMaxFramesInFlight = 3u

staticconstexpr

Definition at line 21 of file renderer.h.

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

• impeller/renderer/renderer.h
• impeller/renderer/renderer.cc