impeller::PlaygroundImplGLES Class Reference

#include <playground_impl_gles.h>

Inheritance diagram for impeller::PlaygroundImplGLES:

Classes
class	ReactorWorker

Public Member Functions
	PlaygroundImplGLES (PlaygroundSwitches switches)
	~PlaygroundImplGLES ()
fml::Status	SetCapabilities (const std::shared_ptr< Capabilities > &capabilities) override
Public Member Functions inherited from impeller::PlaygroundImpl
virtual	~PlaygroundImpl ()
Vector2	GetContentScale () const

Private Member Functions
std::shared_ptr< Context >	GetContext () const override
WindowHandle	GetWindowHandle () const override
std::unique_ptr< Surface >	AcquireSurfaceFrame (std::shared_ptr< Context > context) override

Additional Inherited Members
Public Types inherited from impeller::PlaygroundImpl
using	WindowHandle = void *
Static Public Member Functions inherited from impeller::PlaygroundImpl
static std::unique_ptr< PlaygroundImpl >	Create (PlaygroundBackend backend, PlaygroundSwitches switches)
Protected Member Functions inherited from impeller::PlaygroundImpl
	PlaygroundImpl (PlaygroundSwitches switches)
Protected Attributes inherited from impeller::PlaygroundImpl
const PlaygroundSwitches	switches_

Detailed Description

Definition at line 13 of file playground_impl_gles.h.

Constructor & Destructor Documentation

PlaygroundImplGLES()

impeller::PlaygroundImplGLES::PlaygroundImplGLES ( PlaygroundSwitches  switches )

explicit

Definition at line 64 of file playground_impl_gles.cc.

    : PlaygroundImpl(switches),
      handle_(nullptr, &DestroyWindowHandle),
      worker_(std::shared_ptr<ReactorWorker>(new ReactorWorker())),
      use_angle_(switches.use_angle) {
  if (use_angle_) {
#if IMPELLER_PLAYGROUND_SUPPORTS_ANGLE
    angle_glesv2_ = dlopen("libGLESv2.dylib", RTLD_LAZY);
#endif
    FML_CHECK(angle_glesv2_ != nullptr);
  }
 
  ::glfwDefaultWindowHints();
 
#if FML_OS_MACOSX
  FML_CHECK(use_angle_) << "Must use Angle on macOS for OpenGL ES.";
  ::glfwWindowHint(GLFW_CONTEXT_CREATION_API, GLFW_EGL_CONTEXT_API);
#endif  // FML_OS_MACOSX
  ::glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_ES_API);
  ::glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 2);
  ::glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);
  ::glfwWindowHint(GLFW_RED_BITS, 8);
  ::glfwWindowHint(GLFW_GREEN_BITS, 8);
  ::glfwWindowHint(GLFW_BLUE_BITS, 8);
  ::glfwWindowHint(GLFW_ALPHA_BITS, 8);
  ::glfwWindowHint(GLFW_DEPTH_BITS, 32);   // 32 bit depth buffer
  ::glfwWindowHint(GLFW_STENCIL_BITS, 8);  // 8 bit stencil buffer
  ::glfwWindowHint(GLFW_SAMPLES, 4);       // 4xMSAA
 
  ::glfwWindowHint(GLFW_VISIBLE, GLFW_FALSE);
 
  auto window = ::glfwCreateWindow(1, 1, "Test", nullptr, nullptr);
 
  ::glfwMakeContextCurrent(window);
  worker_->SetReactionsAllowedOnCurrentThread(true);
 
  handle_.reset(window);
}

~PlaygroundImplGLES()

impeller::PlaygroundImplGLES::~PlaygroundImplGLES ( )

default

Member Function Documentation

AcquireSurfaceFrame()

std::unique_ptr< Surface > impeller::PlaygroundImplGLES::AcquireSurfaceFrame ( std::shared_ptr< Context >  context )

overrideprivatevirtual

Implements impeller::PlaygroundImpl.

Definition at line 168 of file playground_impl_gles.cc.

                                    {
  auto window = reinterpret_cast<GLFWwindow*>(GetWindowHandle());
  int width = 0;
  int height = 0;
  ::glfwGetFramebufferSize(window, &width, &height);
  if (width <= 0 || height <= 0) {
    return nullptr;
  }
  SurfaceGLES::SwapCallback swap_callback = [window]() -> bool {
    ::glfwSwapBuffers(window);
    return true;
  };
  return SurfaceGLES::WrapFBO(context,                         //
                              swap_callback,                   //
                              0u,                              //
                              PixelFormat::kR8G8B8A8UNormInt,  //
                              ISize::MakeWH(width, height)     //
  );
}

GetContext()

std::shared_ptr< Context > impeller::PlaygroundImplGLES::GetContext ( ) const

overrideprivatevirtual

Implements impeller::PlaygroundImpl.

Definition at line 128 of file playground_impl_gles.cc.

                                                            {
  auto resolver = use_angle_ ? [](const char* name) -> void* {
    void* symbol = nullptr;
#if IMPELLER_PLAYGROUND_SUPPORTS_ANGLE
    void* angle_glesv2 = dlopen("libGLESv2.dylib", RTLD_LAZY);
    symbol = dlsym(angle_glesv2, name);
#endif
    FML_CHECK(symbol);
    return symbol;
  }
  : [](const char* name) -> void* {
      return reinterpret_cast<void*>(::glfwGetProcAddress(name));
    };
  auto gl = std::make_unique<ProcTableGLES>(resolver);
  if (!gl->IsValid()) {
    FML_LOG(ERROR) << "Proc table when creating a playground was invalid.";
    return nullptr;
  }
 
  auto context = ContextGLES::Create(
      std::move(gl), ShaderLibraryMappingsForPlayground(), true);
  if (!context) {
    FML_LOG(ERROR) << "Could not create context.";
    return nullptr;
  }
 
  auto worker_id = context->AddReactorWorker(worker_);
  if (!worker_id.has_value()) {
    FML_LOG(ERROR) << "Could not add reactor worker.";
    return nullptr;
  }
  return context;
}

GetWindowHandle()

PlaygroundImpl::WindowHandle impeller::PlaygroundImplGLES::GetWindowHandle ( ) const

overrideprivatevirtual

Implements impeller::PlaygroundImpl.

Definition at line 163 of file playground_impl_gles.cc.

                                                                     {
  return handle_.get();
}

SetCapabilities()

fml::Status impeller::PlaygroundImplGLES::SetCapabilities ( const std::shared_ptr< Capabilities > &  capabilities )

overridevirtual

Implements impeller::PlaygroundImpl.

Definition at line 189 of file playground_impl_gles.cc.

                                                     {
  return fml::Status(
      fml::StatusCode::kUnimplemented,
      "PlaygroundImplGLES doesn't support setting the capabilities.");
}

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

• impeller/playground/backend/gles/playground_impl_gles.h
• impeller/playground/backend/gles/playground_impl_gles.cc