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is there any way to use Qt to downscale various kind formats of pictures?

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opengpu2

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#1

is there any way to use Qt to downscale various kind formats of pictures?
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Chris Kawa
Lifetime Qt Champion
wrote on last edited by

#2

You can use QPixmap::scaled() for that.
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C Chris Kawa

You can use QPixmap::scaled() for that.
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opengpu2

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#3

@Chris-Kawa and i want to save the new downscaled picture to a new file...
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O opengpu2

@Chris-Kawa and i want to save the new downscaled picture to a new file...
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p3c0
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#4

@opengpu2 QPixmap::save() ?
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opengpu2

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#5

thank you , i will have a try.
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opengpu2

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#6

is QImage::scaledToWidth & scaledToHeight better?
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Chris Kawa
Lifetime Qt Champion
wrote on last edited by Chris Kawa

#7

Better for what? They do different things. scaledTo* preserves aspect ratio while scaled lets you specify arbitrary size.
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