GraphicsDeviceManager - set resolution and anti aliasing

Graphics
1

Hi all,

I’m trying to apply resolution and anti-aliasing inside the game initialize method, but something is not working as excepted.

Platform: Windows 10
MonoGame version: 3.8.0.1641

With following code:

m_GraphicsDeviceManager.PreferredBackBufferWidth = 1200;
m_GraphicsDeviceManager.PreferredBackBufferHeight = 650;
m_GraphicsDeviceManager.IsFullScreen = false;
m_GraphicsDeviceManager.PreferMultiSampling = true;
m_GraphicsDeviceManager.GraphicsProfile = GraphicsProfile.HiDef;
m_GraphicsDeviceManager.GraphicsDevice.PresentationParameters.MultiSampleCount = 4;
m_GraphicsDeviceManager.ApplyChanges();

I get this:

image

MultiSampleCount changed to 8, but should be 4.

After pressing the game window, drawer results change to:

image

Window size reset to default.

After move AA code to PreparingDeviceSettings event, as follow:

manager.PreferMultiSampling = true;
// manager.GraphicsProfile = GraphicsProfile.HiDef;
e.GraphicsDeviceInformation.GraphicsProfile = GraphicsProfile.HiDef;
e.GraphicsDeviceInformation.PresentationParameters.MultiSampleCount = 4;

Results are:

image

GraphicsProfile do not change, Window size reset and MultiSampleCount is ok.

By using GraphicsProfile from manager instead of GDI, I get desired results:

manager.PreferMultiSampling = true;
manager.GraphicsProfile = GraphicsProfile.HiDef;
// e.GraphicsDeviceInformation.GraphicsProfile = GraphicsProfile.HiDef;
e.GraphicsDeviceInformation.PresentationParameters.MultiSampleCount = 4;

But calling PreferMultiSampling and GraphicsProfile inside PreparingDeviceSettings event, internal applychanges flag is still true, ending up with a dirty GraphicsDeviceManager.

So at the end, I changes as follow:

m_GraphicsDeviceManager.PreferMultiSampling = true;
m_GraphicsDeviceManager.GraphicsProfile = GraphicsProfile.HiDef;
m_GraphicsDeviceManager.ApplyChanges();

m_GraphicsDeviceManager.PreferredBackBufferWidth = 1200;
m_GraphicsDeviceManager.PreferredBackBufferHeight = 650;
m_GraphicsDeviceManager.IsFullScreen = false;
m_GraphicsDeviceManager.ApplyChanges();

Calling ApplyChanges two times results are as excepted.

Is the last approach the correct one? if not, how should I handle this kind of scenario?