public void LoadSample(DemoBase demobase)
{
this.demobase = demobase;
//1.
//note:when we init,
//no glcanvas/ painter are created
demobase.Init();
//-----------------------------------------------
//2. check if demo will create canvas/painter context
//or let this GLDemoContext create for it
hh1 = glControl.Handle; //ensure that contrl handler is created
glControl.MakeCurrent();
demobase.BuildCustomDemoGLContext(out this._glsx, out this.canvasPainter);
//
if (this._glsx == null)
{
//if demo not create canvas and painter
//the we create for it
int max = Math.Max(glControl.Width, glControl.Height);
_glsx = PixelFarm.Drawing.GLES2.GLES2Platform.CreateGLRenderSurface(max, max, glControl.Width, glControl.Height);
_glsx.SmoothMode = SmoothMode.Smooth;//set anti-alias
canvasPainter = new GLPainter(_glsx);
//create text printer for opengl
//----------------------
//1. win gdi based
//var printer = new WinGdiFontPrinter(_glsx, glControl.Width, glControl.Height);
//canvasPainter.TextPrinter = printer;
//----------------------
//2. raw vxs
//var openFontStore = new Typography.TextServices.OpenFontStore();
//var printer = new PixelFarm.Drawing.Fonts.VxsTextPrinter(canvasPainter,openFontStore);
//canvasPainter.TextPrinter = printer;
//----------------------
//3. agg texture based font texture
//var printer = new AggTextSpanPrinter(canvasPainter, glControl.Width, 30);
//canvasPainter.TextPrinter = printer;
//----------------------
//4. texture atlas based font texture
//------------
//resolve request font
var printer = new GLBitmapGlyphTextPrinter(canvasPainter, PixelFarm.Drawing.GLES2.GLES2Platform.TextService);
canvasPainter.TextPrinter = printer;
//var openFontStore = new Typography.TextServices.OpenFontStore();
//var printer = new GLBmpGlyphTextPrinter(canvasPainter, openFontStore);
//canvasPainter.TextPrinter = printer;
}
//-----------------------------------------------
demobase.SetEssentialGLHandlers(
() => this.glControl.SwapBuffers(),
() => this.glControl.GetEglDisplay(),
() => this.glControl.GetEglSurface()
);
//-----------------------------------------------
this.glControl.SetGLPaintHandler((s, e) =>
{
demobase.InvokeGLPaint();
});
DemoBase.InvokeGLContextReady(demobase, this._glsx, this.canvasPainter);
DemoBase.InvokePainterReady(demobase, this.canvasPainter);
}