// This method is called everytime the context needs
// to be recreated. Use it to set any egl-specific settings
// prior to context creation
protected override void CreateFrameBuffer()
{
IEGL10 egl = EGLContext.EGL.JavaCast <IEGL10> ();
var win = new AndroidWindow(Holder);
win.InitializeDisplay();
int[] num_configs = new int[1];
if (!egl.EglGetConfigs(win.Display, null, 0, num_configs))
{
throw EglException.GenerateException("Failed to retrieve GraphicsMode configurations", egl);
}
EGLConfig[] configs = new EGLConfig[num_configs[0]];
if (!egl.EglGetConfigs(win.Display, configs, num_configs[0], num_configs))
{
throw EglException.GenerateException("Failed to retrieve GraphicsMode configurations", egl);
}
Log.Verbose("GLDiag", "Testing {0} graphics configurations", num_configs[0]);
Dictionary <IntPtr, AndroidGraphicsMode> validModes = new Dictionary <IntPtr, AndroidGraphicsMode> ();
int count = 0;
foreach (var c in configs)
{
var r = GetAttrib(egl, win.Display, c, EGL11.EglRedSize);
var g = GetAttrib(egl, win.Display, c, EGL11.EglGreenSize);
var b = GetAttrib(egl, win.Display, c, EGL11.EglBlueSize);
var a = GetAttrib(egl, win.Display, c, EGL11.EglAlphaSize);
var depth = GetAttrib(egl, win.Display, c, EGL11.EglDepthSize);
var stencil = GetAttrib(egl, win.Display, c, EGL11.EglStencilSize);
var s = GetAttrib(egl, win.Display, c, EGL11.EglSampleBuffers);
var samples = GetAttrib(egl, win.Display, c, EGL11.EglSamples);
Log.Verbose("AndroidGraphicsMode", "Testing graphics mode: {8} red {0} green {1} blue {2} alpha {3} ({4}) depth {5} stencil {6} samples {7}",
r, g, b,
a, r + g + b + a, depth,
stencil, samples, count++);
try {
win.CreateSurface(c);
win.DestroySurface();
validModes.Add(c.Handle, new AndroidGraphicsMode(r + g + b + a, depth, stencil, s > 0 ? samples : 0, 2, true));
Log.Verbose("AndroidGraphicsMode", "Graphics mode {0} valid", count - 1);
} catch {
Log.Verbose("AndroidGraphicsMode", "Graphics mode {0} invalid", count - 1);
}
}
win.TerminateDisplay();
if (validModes.Count == 0)
{
throw new EglException("There is no valid graphics mode, aborting");
}
IntPtr key = IntPtr.Zero;
foreach (var k in validModes)
{
if (key == IntPtr.Zero)
{
key = k.Key;
}
var a = k.Value;
Log.Verbose("AndroidGraphicsMode", "Valid graphics mode: {9} red {0} green {1} blue {2} alpha {3} ({4}) depth {5} stencil {6} samples {7} buffers {8}",
a.ColorFormat.Red, a.ColorFormat.Green, a.ColorFormat.Blue,
a.ColorFormat.Alpha, a.ColorFormat.BitsPerPixel, a.Depth,
a.Stencil, a.Samples, a.Buffers, (int)k.Key);
}
GraphicsMode = validModes[key];
// if you don't call this, the context won't be created
base.CreateFrameBuffer();
}