GraphiteDawnWindowContext example?

[Kalen White]

I'm looking for the user of tools/window example in Skia.  In particular GraphiteDawnWindowContext on unix.  What app uses this?  Does sk_app?  The tools/window simply builds a library called libwindow.a and I'm curious if an app somewhere in Skia makes use of this.

How do we get a live example of Dawn + Graphite on ANY os?  I am on Unix but also use Mac/Windows.

Kalen

[Kalen White]

I am noticing the Window code does not support Graphite/Dawn, as its not flushing prior to Swap.  It seems like I am on my own with this one.  Its also very confusing how Window contexts are instanced on the various OS's.  I see no bindings for that.  In my case, I am instancing the Dawn and Graphite from skia's helper directly:

skwindow::XlibWindowInfo info = { };

info.fDisplay = XOpenDisplay(NULL);

XSetWindowAttributes attributes;

attributes.event_mask = ExposureMask | KeyPressMask;

info.fWindow = XCreateWindow(

info.fDisplay, DefaultRootWindow(info.fDisplay), 0, 0, 800, 600, 0,

CopyFromParent, InputOutput, CopyFromParent,

CWEventMask, &attributes);

info.fFBConfig = nullptr;

info.fVisualInfo = nullptr;

info.fWidth = 800;

info.fHeight = 600;

skwindow::DisplayParams dp = { };

dp.fColorType = kRGBA_8888_SkColorType;

dp.fColorSpace = SkColorSpace::MakeSRGB();

dp.fMSAASampleCount = 0;

dp.fGrContextOptions = GrContextOptions();

dp.fSurfaceProps = SkSurfaceProps(0, kBGR_H_SkPixelGeometry);

dp.fDisableVsync = false;

dp.fDelayDrawableAcquisition = false;

dp.fEnableBinaryArchive = false;

dp.fCreateProtectedNativeBackend = false;

std::unique_ptr<skwindow::WindowContext> ctx =

skwindow::MakeGraphiteDawnVulkanForXlib(info, dp);

The paint code is what I need to do now, and it doesnt work to flush anything.

void Window::onPaint() {

if (!fWindowContext) {

return;

}

if (!fIsActive) {

return;

}

sk_sp<SkSurface> backbuffer = fWindowContext->getBackbufferSurface();

if (backbuffer == nullptr) {

printf("no backbuffer!?\n");

// TODO: try recreating testcontext

return;

}

markInvalProcessed();

// draw into the canvas of this surface

this->visitLayers([](Layer* layer) { layer->onPrePaint(); });

this->visitLayers([=](Layer* layer) { layer->onPaint(backbuffer.get()); });

if (auto dContext = this->directContext()) { // <---- this is specific to Ganesh

dContext->flushAndSubmit(backbuffer.get(), GrSyncCpu::kNo);

}

fWindowContext->swapBuffers();

}