Is there a util to load images in the API?

[sasmaster]

I found load.hpp in /image ? Can it load anything or just what is embedded into the API?

Thanks,

[sasmaster]

I also found png.hpp but its impl file throws "can not find png.hpp" smth like that....

[matus-chochlik]

Could you post the error message ? To use the png loader you need to have libpng installed.

[sasmaster]

Well, yeah I guessed so... So I added libpng stuff into oglplus-site.props but still the same error.

Error 2 error C1083: Cannot open include file: 'png.hpp': No such file or directory c:\users\michael\documents\opengl_stuff\oglplus_git\oglplus\implement\oglplus\images\png.ipp 15 1 001_triangle_glut_glew

[matus-chochlik]

That's strange because line 15: includes 'png.h' not png.hpp. Anyway, you need to reconfigure oglplus, so that it knows where to find the libpng's headers. To do that you need to add --include-dir C:\path\to\png\header\dir --library-dir C:\path\to\png\lib\dir when running configure. Manually editing site-config won't work.

In case you are building your own application you also need to specify the include and library dirs to the compiler.

[sasmaster]

Hmm.. That's a kind of problem.I don't run any config...I just have edited site-config.Can I config the VS solution included with OGLPlus manually ?

[sasmaster]

Btw, now I recall why I hadn't used configure.bat eventually on windows.It doesn't work.It returns :"@echo:command not found, ::: command not found "

[sasmaster]

$ configure.bat ./configure.bat: line 1: @echo: command not found ./configure.bat: line 2: ::: command not found ./configure.bat: line 3: syntax error near unexpected token (' ./configure.bat: line 3::: Software License, Version 1.0. (See accompanying fi le'

[matus-chochlik]

That's strange I usually test configure.bat on two machines with windows 7 before release and it works there. Sorry if this is a stupid question but aren't you by any chance running configure.bat from the bash shell coming with the windows install of GIT ? If so, you need to run it from the windows command-line.

But to get libpng going you can do one of two things:

A) copy png.h (and any other headers coming with libpng) to MSVC's include directory, copy. png.lib file to the MSVC's lib directory, and copy png.dll to system32 (you'll need admin rights to do this)

or

B) If you have the lib installed somewhere else and you don't want to do A)

You can edit the $OGLPLUS/etc/msvc11/OGLplus/OGLplus-site.props and do the following:

1) There are some identifiers with trailing underscores like OGLPLUS_DEP_INCLUDEDIRS, etc., for every occurrence remove the last underscore in all such identifiers in this file.

2) there are 4 XML elements like [OGLPLUS_DEP_INCLUDEDIRS]...[/OGLPLUS_DEP_INCLUDEDIRS] containing some example paths, replace these paths with real paths to the include and library dirs, etc.

[sasmaster]

The answer to your first question is : YES/ (thought it should do no difference . Other ways:

A) still didn't try. B) That is what I am doing currently and it doesn't help.The impl doesn't detected the png.hpp header which I think is the OGLplus png.hpp and not libpng.h

[matus-chochlik]

bash cannot interpret windows batch files so you need cmd.exe to run configure.bat. b.t.w. you can use the --for-msvc 10 or --for-msvc 11 command line option to force configure to use the MSVC generators.

Anyway, if you look here: https://github.com/matus-chochlik/oglplus/blob/develop/implement/oglplus/images/png.ipp

line 15 includes png.h not png.hpp. So if you have there #include "png.hpp" then that's an error. Pull the latest version and try again.

[sasmaster]

OK....That's what I did.I changed to png.h .It started complaining about zlib.So I also added zlib header and lib.Then in zconf.h it started complaining about include .Fixed it by wrapping with #if HAVE_UNISTD_H instead of #if 1 ..... Now seems to be working :))) .Any plans to add a built in image loader? Unofficial OpenGL framework has something like that.

Thanks for help.

[matus-chochlik]

No problem,

as for the loader, what exactly do you mean ? There is the images::Load function that loads the images::Image class that can be used directly with Texture::Image*. It currently supports PNG's and (some) XPM's. I have somewhere a PNG, BMP and TGA loader that I wrote a decade or so ago which I could probably use to get rid of the libpng dependency but, it was not very robust :P

[sasmaster]

Well,if it was just dependent on passing in libpng it would be tolerable but once the user is asked to link also vs zlib and configure it ,for many people it may become a pain in the ass :) Probably some header only stuff would be nice,I think GLM creator also has something like this

On Fri, Jan 10, 2014 at 8:12 PM, Matus Chochlik notifications@github.comwrote:

No problem,

as for the loader, what exactly do you mean ? There is the images::Load function that loads the images::Image class that can be used directly with Texture::Image*. It currently supports PNG's and (some) XPM's. I have somewhere a PNG, BMP and TGA loader that I wrote a decade or so ago which I could probably use to get rid of the libpng dependency but, it was not very robust :P

— Reply to this email directly or view it on GitHubhttps://github.com/matus-chochlik/oglplus/issues/43#issuecomment-32050916 .

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