DrawImage Issue

[L2000]

Hi
    I have created offscreen gpu context and created SkSurface(say surface1) to draw my contents.  I took snapshot of the surface and tried drawing the image on another gpu surface(say surface2).But  it's not drawing anything on the surface2. I can draw the image only when i copy the snapshot image to raster image using makeRasterImage. Does skia not permit copying of pixel data between different gpu contexts?

Here is my code:

surface1 :

GrDirectContext* fGrContext = GrDirectContext::MakeMetal(metaldevice,metalqueue,grContextOptions).release();

auto surface1 = SkSurface::MakeRenderTarget(fGrContext, skgpu::Budgeted::kNo, imgInfo)

....after drawing

sk_sp<SkImage> image = surface1->makeImageSnapshot();

image = image->makeRasterImage();

surface2:

auto context = GrDirectContext::MakeMetal((__bridge void*)_mtDevice,(void*)CFBridgingRetain(_mtQueue), grContextOptions).release();

std::shared_ptr<GrContextHolder> fGrContext = std::make_shared<GrContextHolder(std::move(context));

sk_sp<SkSurface> surface2 = SkSurface::MakeFromMTKView(fGrContext->get(), (__bridge GrMTLHandle)metalView, origin, sampleCount, colorType, colorSpace, &surfaceProps);

auto canvas = surface2->getCanvas();

canvas->drawImage(image);

[Brian Osman]

No, that generally doesn't work in Skia (moving images between contexts). Is there a reason you need two contexts (are you using multiple threads?)

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[L2000]

Yes,  I have 4 background threads each having separate context .I will draw my contents and take snapshot of each surfaces. Parallely , in main thread I draw those images in a separate context.