flutter::AndroidSurfaceSoftware Class Reference

#include <android_surface_software.h>

Inheritance diagram for flutter::AndroidSurfaceSoftware:

Public Member Functions
	AndroidSurfaceSoftware ()
	~AndroidSurfaceSoftware () override
bool	IsValid () const override
bool	ResourceContextMakeCurrent () override
bool	ResourceContextClearCurrent () override
std::unique_ptr< Surface >	CreateGPUSurface (GrDirectContext *gr_context) override
void	TeardownOnScreenContext () override
bool	OnScreenSurfaceResize (const DlISize &size) override
bool	SetNativeWindow (fml::RefPtr< AndroidNativeWindow > window, const std::shared_ptr< PlatformViewAndroidJNI > &jni_facade) override
sk_sp< SkSurface >	AcquireBackingStore (const DlISize &size) override
	Called when the GPU surface needs a new buffer to render a new frame into.
bool	PresentBackingStore (sk_sp< SkSurface > backing_store) override
	Called by the platform when a frame has been rendered into the backing store and the platform must display it on-screen.
Public Member Functions inherited from flutter::AndroidSurface
virtual	~AndroidSurface ()
virtual std::unique_ptr< Surface >	CreateSnapshotSurface ()
virtual std::shared_ptr< impeller::Context >	GetImpellerContext ()
virtual void	SetupImpellerSurface ()
Public Member Functions inherited from flutter::GPUSurfaceSoftwareDelegate
	~GPUSurfaceSoftwareDelegate ()

Additional Inherited Members
Protected Member Functions inherited from flutter::AndroidSurface
	AndroidSurface ()

Detailed Description

Definition at line 19 of file android_surface_software.h.

Constructor & Destructor Documentation

AndroidSurfaceSoftware()

flutter::AndroidSurfaceSoftware::AndroidSurfaceSoftware

(

)

Definition at line 43 of file android_surface_software.cc.

                                               {
  GetSkColorType(WINDOW_FORMAT_RGBA_8888, &target_color_type_,
                 &target_alpha_type_);
}

~AndroidSurfaceSoftware()

flutter::AndroidSurfaceSoftware::~AndroidSurfaceSoftware ( )

overridedefault

Member Function Documentation

AcquireBackingStore()

sk_sp< SkSurface > flutter::AndroidSurfaceSoftware::AcquireBackingStore ( const DlISize &  size )

overridevirtual

Called when the GPU surface needs a new buffer to render a new frame into.

Parameters

[in]

size

The size of the frame.

Returns

A raster surface returned by the platform.

Implements flutter::GPUSurfaceSoftwareDelegate.

Definition at line 81 of file android_surface_software.cc.

                         {
  TRACE_EVENT0("flutter", "AndroidSurfaceSoftware::AcquireBackingStore");
  if (!IsValid()) {
    return nullptr;
  }
 
  if (sk_surface_ != nullptr &&  //
      sk_surface_->width() == size.width &&
      sk_surface_->height() == size.height) {
    // The old and new surface sizes are the same. Nothing to do here.
    return sk_surface_;
  }
 
  SkImageInfo image_info =
      SkImageInfo::Make(size.width, size.height, target_color_type_,
                        target_alpha_type_, SkColorSpace::MakeSRGB());
 
  sk_surface_ = SkSurfaces::Raster(image_info);
 
  return sk_surface_;
}

References IsValid(), flutter::size, and TRACE_EVENT0.

CreateGPUSurface()

std::unique_ptr< Surface > flutter::AndroidSurfaceSoftware::CreateGPUSurface ( GrDirectContext *  gr_context )

overridevirtual

Implements flutter::AndroidSurface.

Definition at line 63 of file android_surface_software.cc.

                                 {
  if (!IsValid()) {
    return nullptr;
  }
 
  auto surface =
      std::make_unique<GPUSurfaceSoftware>(this, true /* render to surface */);
 
  if (!surface->IsValid()) {
    return nullptr;
  }
 
  return surface;
}

References IsValid(), and surface.

IsValid()

bool flutter::AndroidSurfaceSoftware::IsValid ( ) const

overridevirtual

Implements flutter::AndroidSurface.

Definition at line 50 of file android_surface_software.cc.

                                           {
  return true;
}

Referenced by AcquireBackingStore(), CreateGPUSurface(), and PresentBackingStore().

OnScreenSurfaceResize()

bool flutter::AndroidSurfaceSoftware::OnScreenSurfaceResize ( const DlISize &  size )

overridevirtual

Implements flutter::AndroidSurface.

Definition at line 149 of file android_surface_software.cc.

                                                                      {
  return true;
}

PresentBackingStore()

bool flutter::AndroidSurfaceSoftware::PresentBackingStore ( sk_sp< SkSurface >  backing_store )

overridevirtual

Called by the platform when a frame has been rendered into the backing store and the platform must display it on-screen.

Parameters

[in]

backing_store

The software backing store to present.

Returns

Returns if the platform could present the backing store onto the screen.

Implements flutter::GPUSurfaceSoftwareDelegate.

Definition at line 104 of file android_surface_software.cc.

                                    {
  TRACE_EVENT0("flutter", "AndroidSurfaceSoftware::PresentBackingStore");
  if (!IsValid() || backing_store == nullptr) {
    return false;
  }
 
  SkPixmap pixmap;
  if (!backing_store->peekPixels(&pixmap)) {
    return false;
  }
 
  ANativeWindow_Buffer native_buffer;
  if (ANativeWindow_lock(native_window_->handle(), &native_buffer, nullptr)) {
    return false;
  }
 
  SkColorType color_type;
  SkAlphaType alpha_type;
  if (GetSkColorType(native_buffer.format, &color_type, &alpha_type)) {
    SkImageInfo native_image_info = SkImageInfo::Make(
        native_buffer.width, native_buffer.height, color_type, alpha_type);
 
    std::unique_ptr<SkCanvas> canvas = SkCanvas::MakeRasterDirect(
        native_image_info, native_buffer.bits,
        native_buffer.stride * SkColorTypeBytesPerPixel(color_type));
 
    if (canvas) {
      SkBitmap bitmap;
      if (bitmap.installPixels(pixmap)) {
        canvas->drawImageRect(
            bitmap.asImage(),
            SkRect::MakeIWH(native_buffer.width, native_buffer.height),
            SkSamplingOptions());
      }
    }
  }
 
  ANativeWindow_unlockAndPost(native_window_->handle());
 
  return true;
}

References alpha_type, color_type, IsValid(), and TRACE_EVENT0.

ResourceContextClearCurrent()

bool flutter::AndroidSurfaceSoftware::ResourceContextClearCurrent ( )

overridevirtual

Implements flutter::AndroidSurface.

Definition at line 59 of file android_surface_software.cc.

                                                         {
  return false;
}

ResourceContextMakeCurrent()

bool flutter::AndroidSurfaceSoftware::ResourceContextMakeCurrent ( )

overridevirtual

Implements flutter::AndroidSurface.

Definition at line 54 of file android_surface_software.cc.

                                                        {
  // Resource Context always not available on software backend.
  return false;
}

SetNativeWindow()

bool flutter::AndroidSurfaceSoftware::SetNativeWindow ( fml::RefPtr< AndroidNativeWindow >  window, const std::shared_ptr< PlatformViewAndroidJNI > &  jni_facade  )

overridevirtual

Implements flutter::AndroidSurface.

Definition at line 153 of file android_surface_software.cc.

                                                             {
  native_window_ = std::move(window);
  if (!(native_window_ && native_window_->IsValid())) {
    return false;
  }
  int32_t window_format = ANativeWindow_getFormat(native_window_->handle());
  if (window_format < 0) {
    return false;
  }
  if (!GetSkColorType(window_format, &target_color_type_,
                      &target_alpha_type_)) {
    return false;
  }
  return true;
}

References window.

TeardownOnScreenContext()

void flutter::AndroidSurfaceSoftware::TeardownOnScreenContext ( )

overridevirtual

Implements flutter::AndroidSurface.

Definition at line 147 of file android_surface_software.cc.

{}

---

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

• shell/platform/android/android_surface_software.h
• shell/platform/android/android_surface_software.cc