Ganesh example does not work

[Joel de Guzman]

Hi,

The code in the docs for setting up a Ganesh Surface does not seem to work:

  https://skia.org/user/api/canvas#ganesh

I am getting compile errors with the latest code.

I'm very new to Skia. My intent is to get up and running with the GPU backend. 

I have an NSOpenGLView (OSX Cocoa) set up and I am able to draw OpenGL shapes

in the view (The GL context and all that stuff is already prepared).

Is there an updated tutorial on how to set it up?

Thanks in advance for any help!

--Joel

[Matthew Leibowitz]

My OpenGL is a bit (very) rough, but I managed to get it going with this, note the "skia_" methods:

https://gist.github.com/mattleibow/fb6bfa5146d776f26febfa3a6d4286f0

This is to get the default context:

    skiaContext = GrContext::Create(kOpenGL_GrBackend, 0); // default

Then, each time to get the surface: 

GrBackendRenderTargetDesc desc; desc.fWidth = w; desc.fHeight = h; desc.fConfig = kSkia8888_GrPixelConfig; desc.fOrigin = kBottomLeft_GrSurfaceOrigin; desc.fSampleCnt = 1; // may need 0 desc.fStencilBits = 0; desc.fRenderTargetHandle = 0; // deafult skiaSurface = SkSurface::MakeFromBackendRenderTarget(skiaContext, desc, NULL).release(); SkCanvas* skiaCanvas = skiaSurface->getCanvas(); // draw! skiaCanvas->flush();

[Matthew Leibowitz]

I will remark that Skia is missing those ultra simple examples showing setup :)

On Saturday, August 20, 2016 at 3:10:33 AM UTC+2, Joel de Guzman wrote: