skwindow::internal::MetalWindowContext Class Reference

#include <MetalWindowContext.h>

Inheritance diagram for skwindow::internal::MetalWindowContext:

Public Member Functions
sk_sp< SkSurface >	getBackbufferSurface () override
bool	isValid () override
void	setDisplayParams (const DisplayParams &params) override
Public Member Functions inherited from skwindow::WindowContext
	WindowContext (const DisplayParams &)
virtual	~WindowContext ()
void	swapBuffers ()
virtual void	resize (int w, int h)=0
virtual void	activate (bool isActive)
const DisplayParams &	getDisplayParams ()
GrDirectContext *	directContext () const
int	width () const
int	height () const
SkISize	dimensions () const
int	sampleCount () const
int	stencilBits () const

Protected Member Functions
	MetalWindowContext (const DisplayParams &)
void	initializeContext ()
virtual bool	onInitializeContext ()=0
void	destroyContext ()
virtual void	onDestroyContext ()=0
void	onSwapBuffers () override
Protected Member Functions inherited from skwindow::WindowContext
virtual bool	isGpuContext ()

Protected Attributes
bool	fValid
sk_cfp< id< MTLDevice > >	fDevice
sk_cfp< id< MTLCommandQueue > >	fQueue
CAMetalLayer *	fMetalLayer
GrMTLHandle	fDrawableHandle
Protected Attributes inherited from skwindow::WindowContext
sk_sp< GrDirectContext >	fContext
int	fWidth
int	fHeight
DisplayParams	fDisplayParams
int	fSampleCount = 1
int	fStencilBits = 0

Detailed Description

Definition at line 22 of file MetalWindowContext.h.

Constructor & Destructor Documentation

MetalWindowContext()

skwindow::internal::MetalWindowContext::MetalWindowContext ( const DisplayParams &  params )

protected

Definition at line 30 of file MetalWindowContext.mm.

        : WindowContext(params)
        , fValid(false)
        , fDrawableHandle(nil) {
    fDisplayParams.fMSAASampleCount = GrNextPow2(fDisplayParams.fMSAASampleCount);
}

Member Function Documentation

destroyContext()

void skwindow::internal::MetalWindowContext::destroyContext ( )

protected

Definition at line 68 of file MetalWindowContext.mm.

                                        {
    if (fContext) {
        // in case we have outstanding refs to this (lua?)
        fContext->abandonContext();
        fContext.reset();
    }
 
    this->onDestroyContext();
 
    fMetalLayer = nil;
    fValid = false;
 
    fQueue.reset();
    fDevice.reset();
}

getBackbufferSurface()

sk_sp< SkSurface > skwindow::internal::MetalWindowContext::getBackbufferSurface ( )

overridevirtual

Implements skwindow::WindowContext.

Definition at line 84 of file MetalWindowContext.mm.

                                                          {
    sk_sp<SkSurface> surface;
    if (fContext) {
        if (fDisplayParams.fDelayDrawableAcquisition) {
            surface = SkSurfaces::WrapCAMetalLayer(fContext.get(),
                                                   (__bridge GrMTLHandle)fMetalLayer,
                                                   kTopLeft_GrSurfaceOrigin,
                                                   fSampleCount,
                                                   kBGRA_8888_SkColorType,
                                                   fDisplayParams.fColorSpace,
                                                   &fDisplayParams.fSurfaceProps,
                                                   &fDrawableHandle);
        } else {
            id<CAMetalDrawable> currentDrawable = [fMetalLayer nextDrawable];
            if (currentDrawable == nil) {
                return nullptr;
            }
 
            GrMtlTextureInfo fbInfo;
            fbInfo.fTexture.retain(currentDrawable.texture);
 
            GrBackendRenderTarget backendRT =
                    GrBackendRenderTargets::MakeMtl(fWidth, fHeight, fbInfo);
 
            surface = SkSurfaces::WrapBackendRenderTarget(fContext.get(),
                                                          backendRT,
                                                          kTopLeft_GrSurfaceOrigin,
                                                          kBGRA_8888_SkColorType,
                                                          fDisplayParams.fColorSpace,
                                                          &fDisplayParams.fSurfaceProps);
 
            fDrawableHandle = CFRetain((GrMTLHandle) currentDrawable);
        }
    }
 
    return surface;
}

initializeContext()

void skwindow::internal::MetalWindowContext::initializeContext ( )

protected

Definition at line 37 of file MetalWindowContext.mm.

                                           {
    SkASSERT(!fContext);
 
    fDevice.reset(MTLCreateSystemDefaultDevice());
    fQueue.reset([*fDevice newCommandQueue]);
 
    if (fDisplayParams.fMSAASampleCount > 1) {
        if (@available(macOS 10.11, iOS 9.0, tvOS 9.0, *)) {
            if (![*fDevice supportsTextureSampleCount:fDisplayParams.fMSAASampleCount]) {
                return;
            }
        } else {
            return;
        }
    }
    fSampleCount = fDisplayParams.fMSAASampleCount;
    fStencilBits = 8;
 
    fValid = this->onInitializeContext();
 
    GrMtlBackendContext backendContext = {};
    backendContext.fDevice.retain((GrMTLHandle)fDevice.get());
    backendContext.fQueue.retain((GrMTLHandle)fQueue.get());
    fContext = GrDirectContexts::MakeMetal(backendContext, fDisplayParams.fGrContextOptions);
    if (!fContext && fDisplayParams.fMSAASampleCount > 1) {
        fDisplayParams.fMSAASampleCount /= 2;
        this->initializeContext();
        return;
    }
}

isValid()

bool skwindow::internal::MetalWindowContext::isValid ( )

inlineoverridevirtual

Implements skwindow::WindowContext.

Definition at line 26 of file MetalWindowContext.h.

{ return fValid; }

onDestroyContext()

virtual void skwindow::internal::MetalWindowContext::onDestroyContext ( )

protectedpure virtual

onInitializeContext()

virtual bool skwindow::internal::MetalWindowContext::onInitializeContext ( )

protectedpure virtual

onSwapBuffers()

void skwindow::internal::MetalWindowContext::onSwapBuffers ( )

overrideprotectedvirtual

Implements skwindow::WindowContext.

Definition at line 122 of file MetalWindowContext.mm.

                                       {
    id<CAMetalDrawable> currentDrawable = (id<CAMetalDrawable>)fDrawableHandle;
 
    id<MTLCommandBuffer> commandBuffer([*fQueue commandBuffer]);
    commandBuffer.label = @"Present";
 
    [commandBuffer presentDrawable:currentDrawable];
    [commandBuffer commit];
    // ARC is off in sk_app, so we need to release the CF ref manually
    CFRelease(fDrawableHandle);
    fDrawableHandle = nil;
}

setDisplayParams()

void skwindow::internal::MetalWindowContext::setDisplayParams ( const DisplayParams &  params )

overridevirtual

Implements skwindow::WindowContext.

Definition at line 135 of file MetalWindowContext.mm.

                                                                     {
    this->destroyContext();
    fDisplayParams = params;
    this->initializeContext();
}

Member Data Documentation

fDevice

sk_cfp<id<MTLDevice> > skwindow::internal::MetalWindowContext::fDevice

protected

Definition at line 46 of file MetalWindowContext.h.

fDrawableHandle

GrMTLHandle skwindow::internal::MetalWindowContext::fDrawableHandle

protected

Definition at line 49 of file MetalWindowContext.h.

fMetalLayer

CAMetalLayer* skwindow::internal::MetalWindowContext::fMetalLayer

protected

Definition at line 48 of file MetalWindowContext.h.

fQueue

sk_cfp<id<MTLCommandQueue> > skwindow::internal::MetalWindowContext::fQueue

protected

Definition at line 47 of file MetalWindowContext.h.

fValid

bool skwindow::internal::MetalWindowContext::fValid

protected

Definition at line 45 of file MetalWindowContext.h.

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

• third_party/skia/tools/window/MetalWindowContext.h
• third_party/skia/tools/window/MetalWindowContext.mm