protected sealed override void CreateDrawingSurface()
{
if (glSurface == IntPtr.Zero)
{
// create the surface
glSurface = Evas.evas_gl_surface_create(glEvas, glConfigPtr, surfaceSize.Width, surfaceSize.Height);
// copy the native surface to the image
Evas.evas_gl_native_surface_get(glEvas, glSurface, out var nativeSurface);
Evas.evas_object_image_native_surface_set(evasImage, ref nativeSurface);
// switch to the current OpenGL context
Evas.evas_gl_make_current(glEvas, glSurface, glContext);
// resize the viewport
Gles.glViewport(0, 0, surfaceSize.Width, surfaceSize.Height);
// create the interface using the function pointers provided by the EFL
var glInterface = GRGlInterface.CreateEvas(glEvas);
if (glInterface == null)
{
Log.Error("SKGLSurfaceView", "Unable to create GRGlInterface.");
}
if (!glInterface.Validate())
{
Log.Error("SKGLSurfaceView", "The created GRGlInterface was not valid.");
}
context?.Dispose();
context = GRContext.CreateGl(glInterface);
if (context == null)
{
Log.Error("SKGLSurfaceView", "Unable to create the GRContext.");
}
// create the render target
renderTarget?.Dispose();
Gles.glGetIntegerv(Gles.GL_FRAMEBUFFER_BINDING, out var framebuffer);
Gles.glGetIntegerv(Gles.GL_STENCIL_BITS, out var stencil);
Gles.glGetIntegerv(Gles.GL_SAMPLES, out var samples);
var maxSamples = context.GetMaxSurfaceSampleCount(colorType);
if (samples > maxSamples)
{
samples = maxSamples;
}
glInfo = new GRGlFramebufferInfo((uint)framebuffer, colorType.ToGlSizedFormat());
renderTarget = new GRBackendRenderTarget(surfaceSize.Width, surfaceSize.Height, samples, stencil, glInfo);
// create the surface
surface?.Dispose();
surface = SKSurface.Create(context, renderTarget, surfaceOrigin, colorType);
canvas = surface.Canvas;
}
}