screen.resolution is expired data.

[smallmain]

Cocos Creator version

3.8.0

System information

MacOS

Issue description

Modify shadingScale, screen.resolution will not be refreshed.

Relevant error log output

No response

Steps to reproduce

RT.

Minimal reproduction project

No response

[dumganhar]

screen.resolution is a readonly property, so if you modify its return value directly like screen.resolution.width = xxx;, it will not take effect.

    /**
     * @en Get the current resolution of game.
     * This is a readonly property.
     * @zh 获取当前游戏的分辨率。
     * 这是一个只读属性。
     *
     * @readonly
     */
    public get resolution (): Size {
        return screenAdapter.resolution;
    }

And about shadingScale, did you mean director.root.pipeline.shadingScale?

[smallmain]

screen.resolution is a readonly property, so if you modify its return value directly like screen.resolution.width = xxx;, it will not take effect.

    /**
     * @en Get the current resolution of game.
     * This is a readonly property.
     * @zh 获取当前游戏的分辨率。
     * 这是一个只读属性。
     *
     * @readonly
     */
    public get resolution (): Size {
        return screenAdapter.resolution;
    }

And about shadingScale, did you mean director.root.pipeline.shadingScale?

Yeah I know, I mean

director.root.pipeline.shadingScale
screen.resolutionScale
screen.resolution

The relationship between these three looks like:

• resolution in the code is the actual rendering resolution (winSize * resolutionScale)
• resolutionScale has the same meaning as shadingScale

Modifying resolutionScale will cause shadingScale to change, but modifying shadingScale will not, so resolution has not changed, but the actual rendering resolution has changed.

[dumganhar]

I found screen.resolutionScale method was commented at https://github.com/cocos/cocos-engine/pull/9642/files#diff-be2bdcc494d154ec3dc114bc27094a50d857d8eff8f9f18c122eb342dadc63ed . It was a change from v3.4.0. So you probably could not use screen.resolutionScale now.

I will check this functionality later.

[star-e]

director.root.resize changes screen size. For example window size 1920 x 1080 -> 1280 x 720
director.root.pipeline.shadingScale does not change window size. It changes render pipeline render targets' sizes.
For example, if screen size is 1920 x 1080, shading can be done at 1280 x 720 by changing shading scale, and then copied to 1920 x 1080 screen.
@smallmain

[smallmain]

director.root.resize changes screen size. For example window size 1920 x 1080 -> 1280 x 720 director.root.pipeline.shadingScale does not change window size. It changes render pipeline render targets' sizes. For example, if screen size is 1920 x 1080, shading can be done at 1280 x 720 by changing shading scale, and then copied to 1920 x 1080 screen. @smallmain

ah, what is the difference between director.root.resize and setting screen.windowSize?

[dumganhar]

cc.screen.windowSize changes the system window size.
director.root.resize changes the rendering target size.

[smallmain]

cc.screen.windowSize changes the system window size. director.root.resize changes the rendering target size.

director.root.pipeline.shadingScale does not change window size. It changes render pipeline render targets' sizes.

ah, what is the difference between director.root.resize and setting director.root.pipeline.shadingScale?