Re: [Interest] QML Image sourceSize bug (?)
On 27/03/2021 15:46, Alexander Dyagilev wrote:
If I enable mipmap, it looks much better comparing to original variant,
but still worse comparing to the final one (described in my original
posting).
I can provide you all the screenshots if you want to.
I can only entertain that mipmapping in your case is going to use
trilinear interpolation (*) between the 32x32 and the 16x16 mip. And,
for your particular image ("artwork" / "icon"), that is giving you worse
results than a 27x27 image scaled directly from the source via bilinear
interpolation.
There's not much to do about this:
* mipmapping allows you to keep a good visual quality if the displayed
size of the image changes
* sourceSize allows you to get a good scaled-down version and save on
memory, but will look awful if now you try to make the image bigger again
(*) didn't check the actual code, just assumed a GL_LINEAR_MIPMAP_LINEAR
setting.
HTH,
--
Giuseppe D'Angelo | giuseppe.dang...@kdab.com | Senior Software Engineer
KDAB (France) S.A.S., a KDAB Group company
Tel. France +33 (0)4 90 84 08 53, http://www.kdab.com
KDAB - The Qt, C++ and OpenGL Experts
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Re: [Interest] QML Image sourceSize bug (?)
First, thank you for your answers :) If I enable mipmap, it looks much better comparing to original variant, but still worse comparing to the final one (described in my original posting). I can provide you all the screenshots if you want to. On 3/27/2021 4:35 PM, Giuseppe D'Angelo wrote: On 27/03/2021 11:56, Alexander Dyagilev wrote: No. On 3/27/2021 1:24 PM, Giuseppe D'Angelo via Interest wrote: On 27/03/2021 04:20, Alexander Dyagilev wrote: Looks better. Why is it so? Did you enable mipmapping for the first one? Well, does it improve it you enable it? Thanks, ___ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest
Re: [Interest] QML Image sourceSize bug (?)
On 27/03/2021 11:56, Alexander Dyagilev wrote: No. On 3/27/2021 1:24 PM, Giuseppe D'Angelo via Interest wrote: On 27/03/2021 04:20, Alexander Dyagilev wrote: Looks better. Why is it so? Did you enable mipmapping for the first one? Well, does it improve it you enable it? Thanks, -- Giuseppe D'Angelo | giuseppe.dang...@kdab.com | Senior Software Engineer KDAB (France) S.A.S., a KDAB Group company Tel. France +33 (0)4 90 84 08 53, http://www.kdab.com KDAB - The Qt, C++ and OpenGL Experts smime.p7s Description: S/MIME Cryptographic Signature ___ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest
Re: [Interest] QML Image sourceSize bug (?)
No. On 3/27/2021 1:24 PM, Giuseppe D'Angelo via Interest wrote: On 27/03/2021 04:20, Alexander Dyagilev wrote: Looks better. Why is it so? Did you enable mipmapping for the first one? Thanks, ___ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest ___ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest
Re: [Interest] QML Image sourceSize bug (?)
On 27/03/2021 04:20, Alexander Dyagilev wrote: Looks better. Why is it so? Did you enable mipmapping for the first one? Thanks, -- Giuseppe D'Angelo | giuseppe.dang...@kdab.com | Senior Software Engineer KDAB (France) S.A.S., a KDAB Group company Tel. France +33 (0)4 90 84 08 53, http://www.kdab.com KDAB - The Qt, C++ and OpenGL Experts smime.p7s Description: S/MIME Cryptographic Signature ___ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest
[Interest] QML Image sourceSize bug (?)
I have PNG image of 256x256 size.
I'm trying to show it on 25x25 size using this code:
Image{
width:25
height:25
fillMode:Image.PreserveAspectFit
horizontalAlignment:Image.AlignHCenter
verticalAlignment:Image.AlignVCenter
source:preview.url
}
I'm getting this:
If I add sourceSize so the code becomes this:
Image{
width:25
height:25
sourceSize.height:25
sourceSize.width:25
fillMode:Image.PreserveAspectFit
horizontalAlignment:Image.AlignHCenter
verticalAlignment:Image.AlignVCenter
source:preview.url
}
I'm getting this:
Looks better. Why is it so?
OS: Windows 10. Screen.devicePixelRatio is 1.0.
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