DesktopGL: GraphicsDevice.ScissorRectangle is set only once and isn't updated if the window gets resized

[rds1983]

Prerequisites

• I have verified this issue is not present in the develop branch
• I have searched open and closed issues to ensure it has not already been reported.

MonoGame Version

MonoGame 3.8.1.303

Which MonoGame platform are you using?

MonoGame Cross-Platform Desktop Application (mgdesktopgl)

Operating System

Windows

Description

GraphicsDevice.ScissorRectangle is set to wrong value if GraphicsDevice.Clear is called.
Initially ScissorRectangle is set to the window size on the initialization:

MonoGame/MonoGame.Framework/Graphics/GraphicsDevice.cs

Line 385 in a91dcc7

ScissorRectangle = _viewport.Bounds;

And seems that it never gets updated.

Steps to Reproduce

1. Unpack the attached sample, open in the IDE and run.
2. Resize the window.
3. Notice that the image gets cut. That happens because of the wrong Graphics.ScissorRectangle.

Minimal Example Repo

No response

Expected Behavior

GraphicsRectangle should be synchronized with the ViewPort. That's how it works for MonoGame.WindowsDX.

Resulting Behavior

scissorBug.mp4

Files

MGScissorResize.zip

[Peru-S]

When the viewport gets resized, doesn't it update both Viewport and ScissorRectangle ?

[rds1983]

Well, check the sample. It's quite simple and the image shouldn't be cut on resize. But it is cut.
Moreover it works properly for MonoGame.WindowsDX.

[samercer2002]

Hello, as this issue seems to still be present, is it open for me to take a look at? I'd like to work on it.