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Groups > comp.lang.basic.visual.misc > #2427

Re: VB6 Image Resizer

From Arne Saknussemm <es215.10.wannabet@spamgourmet.com>
Newsgroups comp.lang.basic.visual.misc, microsoft.public.vb.general.discussion
Subject Re: VB6 Image Resizer
Date 2020-03-29 15:48 +0200
Organization n/a
Message-ID <20200329154826.00007a8d@eternal-september.org> (permalink)
References <r5mjl1$g3p$1@dont-email.me> <r5nlho$5i0$1@dont-email.me> <20200328171731.0000601c@eternal-september.org> <r5o5tf$pbi$1@dont-email.me>

Cross-posted to 2 groups.

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It was Sat, 28 Mar 2020 14:43:48 -0400 when
"Mayayana" <mayayana@invalid.nospam> wrote:

>   I maybe should have explained that: One can't
> just extract a thumbnail and load it into a
> picturebox. A JPG thumbnail is, in fact, an actual
> file. But uncompressed RGB thumbnails are in reverse
> byte order and have no header. So the bytes have
> to be reversed. Then a header has to be created.
> Only then do you have a file that can be loaded.

My point is that Windows GDI APIs work on DIBs, those
are an in-memory representation of an image which may
then be stored to (or retrieved from) whatever
format, be it JPG, PNG or whatever, such formats are
just STORAGE formats, so instead of focusing on how a
given image is stored, it would be a better idea to
focus on how to quickly render it, then, to retrieve
the image from storage and decode it, there are a
bunch of libraries and APIs, so that shouldn't be a
big issue, nor it would be how the image is stored,
once you load and decode it from storage, you'll have
a DIB and that's all you need to show/manipulate it,
no need to worry about orientation/format/whatever

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Thread

VB6 Image Resizer GS <gs@v.invalid> - 2020-03-28 00:26 -0400
  Re: VB6 Image Resizer "Mayayana" <mayayana@invalid.nospam> - 2020-03-28 10:04 -0400
    Re: VB6 Image Resizer Arne Saknussemm <es215.10.wannabet@spamgourmet.com> - 2020-03-28 17:17 +0100
      Re: VB6 Image Resizer "Mayayana" <mayayana@invalid.nospam> - 2020-03-28 14:12 -0400
      Re: VB6 Image Resizer "Mayayana" <mayayana@invalid.nospam> - 2020-03-28 14:43 -0400
        Re: VB6 Image Resizer Arne Saknussemm <es215.10.wannabet@spamgourmet.com> - 2020-03-29 15:48 +0200
          Re: VB6 Image Resizer "Mayayana" <mayayana@invalid.nospam> - 2020-03-29 10:41 -0400
          Re: VB6 Image Resizer GS <gs@v.invalid> - 2020-03-29 13:30 -0400
            Re: VB6 Image Resizer GS <gs@v.invalid> - 2020-03-29 13:54 -0400
              Re: VB6 Image Resizer "Mayayana" <mayayana@invalid.nospam> - 2020-03-29 15:36 -0400
                Re: VB6 Image Resizer GS <gs@v.invalid> - 2020-03-29 16:19 -0400
                Re: VB6 Image Resizer "Mayayana" <mayayana@invalid.nospam> - 2020-03-29 18:40 -0400
                Re: VB6 Image Resizer GS <gs@v.invalid> - 2020-03-29 18:49 -0400
                Re: VB6 Image Resizer "Mayayana" <mayayana@invalid.nospam> - 2020-03-29 23:17 -0400
                Re: VB6 Image Resizer GS <gs@v.invalid> - 2020-03-30 07:44 -0400
                Re: VB6 Image Resizer "Mayayana" <mayayana@invalid.nospam> - 2020-03-30 09:52 -0400
                Re: VB6 Image Resizer GS <gs@v.invalid> - 2020-03-30 12:37 -0400
                Re: VB6 Image Resizer GS <gs@v.invalid> - 2020-03-30 13:35 -0400
    Re: VB6 Image Resizer GS <gs@v.invalid> - 2020-03-28 14:59 -0400
      Re: VB6 Image Resizer "Mayayana" <mayayana@invalid.nospam> - 2020-03-28 16:39 -0400
        Re: VB6 Image Resizer GS <gs@v.invalid> - 2020-03-28 17:57 -0400
        Re: VB6 Image Resizer GS <gs@v.invalid> - 2020-03-28 18:44 -0400
          Re: VB6 Image Resizer "Mayayana" <mayayana@invalid.nospam> - 2020-03-28 22:49 -0400
            Re: VB6 Image Resizer GS <gs@v.invalid> - 2020-03-29 13:22 -0400
  Re: VB6 Image Resizer "Peter T" <askmy@email.com> - 2020-03-30 17:29 +0100
    Re: VB6 Image Resizer GS <gs@v.invalid> - 2020-03-30 12:34 -0400
      Re: VB6 Image Resizer "Peter T" <askmy@email.com> - 2020-03-31 10:59 +0100
        Re: VB6 Image Resizer GS <gs@v.invalid> - 2020-03-31 09:43 -0400
        Re: VB6 Image Resizer GS <gs@v.invalid> - 2020-03-31 12:53 -0400
  Re: VB6 Image Resizer "Mayayana" <mayayana@invalid.nospam> - 2020-03-30 18:20 -0400
    Re: VB6 Image Resizer GS <gs@v.invalid> - 2020-03-30 18:50 -0400
    Re: VB6 Image Resizer GS <gs@v.invalid> - 2020-03-30 18:56 -0400
      Re: VB6 Image Resizer "Mayayana" <mayayana@invalid.nospam> - 2020-03-30 21:24 -0400
        Re: VB6 Image Resizer GS <gs@v.invalid> - 2020-03-30 21:30 -0400
          Re: VB6 Image Resizer "Mayayana" <mayayana@invalid.nospam> - 2020-03-30 22:01 -0400
            Re: VB6 Image Resizer GS <gs@v.invalid> - 2020-03-30 22:11 -0400
  Re: VB6 Image Resizer "Mayayana" <mayayana@invalid.nospam> - 2020-03-31 17:41 -0400
    Re: VB6 Image Resizer GS <gs@v.invalid> - 2020-03-31 17:51 -0400
      Re: VB6 Image Resizer "Mayayana" <mayayana@invalid.nospam> - 2020-03-31 21:08 -0400
        Re: VB6 Image Resizer GS <gs@v.invalid> - 2020-03-31 21:14 -0400

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