nimforum mirror - Screenshot / Screencapture

Lecale (orginal) [2019-10-30T15:14:24+01:00] view original

Does anyone know of any package or library that lets you take a screencapture? I would like to implement something similar to the speedline module, at least in terms of its mathematical formulation. The only thing I found was nsu - which does not build

JohnS (orginal) [2019-10-30T17:01:46+01:00] view original

What's the build error you see?

Lecale (orginal) [2019-10-30T18:20:28+01:00] view original

I get Error: 2147549183 can't be converted to HRESULT with nim 1.0

JohnS (orginal) [2019-10-31T22:08:38+01:00] view original

I did exactly that, replace oldwinapi with winim and change some definitions around to make it work. I got it to compile after modifying the png package (replacing TFile with File), but I don't have a working png.dll to verify it works.

I also don't know enough about the PNG format/processing to gauge how hard it would be to port it to nimPNG but that would presumably remove the requirement for the dll.

treeform (orginal) [2019-10-31T23:39:52+01:00] view original

You can try using flippy to save your PNG. https://github.com/treeform/flippy that uses stb_image.

treeform (orginal) [2019-11-01T01:48:59+01:00] view original

Here is code that takes a screenshot on windows:

https://gist.github.com/treeform/782149b5fc938753feacfca43637aa90

Win32 api is nasty some times.

Lecale (orginal) [2019-11-01T07:51:23+01:00] view original

I found the same error with png library. Treeform your example looks good enough to start with. After that I just have to port the rest of my c#

JohnS (orginal) [2019-11-01T12:35:22+01:00] view original

Oh that's really straightforward, nice!

I'll try to get a minute this weekend to send a PR over to nsu.

Lecale (orginal) [2019-11-06T21:02:23+01:00] view original

I did just try out some of the flippy library, and I got a bit stuck trying to use it. Raised an issue for you to correct me :)

JohnS (orginal) [2019-11-08T05:11:06+01:00] view original

I submitted a PR: https://github.com/Senketsu/nsu/pull/3

Updates nsu to work with Nim 1.0

Migrates from oldwinapi to winim

Removes the dependency on the broken png library and libpng.dll (replacing it with Flippy, thanks @treeform !)

Fixes a bug on Windows where high DPI displays weren't captured correctly

If you want to try it directly, you can pull from https://github.com/johnscillieri/nsu

I have no idea if there is a better way to create the PNG using Flippy, but it works for me on Linux and Windows.

Lecale (orginal) [2019-11-08T10:36:31+01:00] view original

Thanks JohnS . I am going to try this, but I have an interesting error with the STB_Image library. When I am trying to use fopen it's throwing an STBI exception for me depending on the specific method call it's pointing back to. I

Lecale (orginal) [2019-11-08T21:40:56+01:00] view original

Yes, as I expected, although the library is just what I want, when I hit the line image.save(destPath) STBI throws an exception

treeform (orginal) [2019-11-08T22:44:52+01:00] view original

The fopen stuff you have going on on your computer is very strange

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