Snapshot of Viewer in .GIF Format doesn't work properly

varun.jamia
Fri, 11/28/2008 - 09:43

Forums:

Hello to all,

I am new to OCC.
I need your help in solving one query of mine.

I am trying to save the viewer content in .gif format in Windows and it is getting saved in Windows, but the problem comes when i try to open that image.

It is not getting opened in Microsoft Office Picture Manager/ Paint/ Windows picture and fax viewer but in CorelDraw Graphics Suite X3.In fact even its preview is not available.

i am using Dump function of V3d_View class with single argument of filename with extension.

Please i need your suggestions.

Roman Lygin
Fri, 11/28/2008 - 19:02

Hello,

Interesting ! I have just checked with the Import/Export MFC sample. The dumped gif image is opened just fine in IrfanView but when I try to open it with Paint, it fails claiming the following:

---------------------------
Paint
---------------------------
C:\temp\test.gif
Paint cannot read this file.
This is not a valid bitmap file, or its format is not currently supported.

Weird...

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Pawel
Sat, 11/29/2008 - 22:57

Confirmed.

Works fine when I use my internet browser but doesn't work with Paint.

Pawel

Timo Roth
Thu, 03/18/2010 - 12:12

The reason why many programs cannot open the gif is probably that it uses the original standard GIF87a. There is a newer one, GIF89a.
You can see the used format if you open the gif-file in a text editor.

To save a 3D view snapshot in a custom image format, the most flexible approach is to generate a set of pixels using V3d_View::ToPixMap() method, and then saving it to the required image format using some third-party or in-house tools. For instance, a Qt-based application can do this using Qt image codecs.