when I use skia on android, I get symbol conflict

[陈国栋]

I am making a engine to do some drawing. And it will  cross ios, android, windows plateform.

so I select skia and cpp as basement. 

but for android. I use NDK and JNI to call c++ function form java code.

And android is already embed skia library which has different version and different api interface on different android system version.

so I must be build myself skia version and link it. 

But android app has build it itself skia version. when I load my so which link myself skia version. will be symbol conflict.

so how can I do with it ? 

[Matthew Leibowitz]

You may be using C++, but you can check out the bits on the mono fork and project SkiaSharp where we have a cross-platform drawing for iOS/tvOS/Android/Mac/Linux/Windows/UWP:

https://github.com/mono/SkiaSharp (our C# wrapper)

https://github.com/mono/skia (our skia fork - almost no changes, just the build bits)

Our m56 build scripts: https://github.com/mono/SkiaSharp/blob/master/cake/BuildExternals.cake

I am working on a new script for GN and m57: https://github.com/mono/SkiaSharp/blob/update-m57/cake/BuildExternals.cake This is still in progress and only iOS/tvOS/macOS/Android builds, and the other platforms won't even start yet. Should be done soon.

[陈国栋]

Ok  thanks.  do  you  use  GPU render ？skia  is  slowly  when  I draw  something on  ios  plateform.  now screen is  so much  pixels must  be  shader.  It  is performance bad.

Matthew Leibowitz <mattl...@live.com>于2017年3月14日 周二上午10:31写道：

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[Matthew Leibowitz]

We do both. basically, you set up you GL context as if you were going to do normal GL - you could use a GLKView, and then in the DrawInRect method, just create your GrGLInterface and GrGLContext.

This is my view, it is C#, but should translate:

https://github.com/mono/SkiaSharp/blob/master/source/SkiaSharp.Views/SkiaSharp.Views.AppleiOS/SKGLView.cs

[陈国栋]

is this will be accelerate render? I just know that vector  graphic is hard to accelerate?  can be 60 fps? 

在 2017年3月14日星期二 UTC+8下午12:29:12，Matthew Leibowitz写道：

[陈国栋]

I hava try use gl backend.  code like that:

GrContext* context = GrContext::Create(

        kOpenGL_GrBackend, (GrBackendContext)interface);

    if (premul_alpha_) {

        surface_ = SkSurface::MakeRenderTarget(context,

            SkBudgeted::kNo, SkImageInfo::Make(size_.width_,

                size_.height_, kN32_SkColorType, kPremul_SkAlphaType));

    } else {

        surface_ = SkSurface::MakeRenderTarget(context,

            SkBudgeted::kNo, SkImageInfo::Make(size_.width_,

                size_.height_, kN32_SkColorType, kUnpremul_SkAlphaType));

    }

but it crash at "GrContext::Create", I was build on Mac OS. If I shoud link some opengl lib? 

在 2017年3月14日星期二 UTC+8下午12:29:12，Matthew Leibowitz写道：

We do both. basically, you set up you GL context as if you were going to do normal GL - you could use a GLKView, and then in the DrawInRect method, just create your GrGLInterface and GrGLContext.