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DevIL

 
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dav1d



Joined: 12 Sep 2011
Posts: 40
PostPosted: Wed Jan 18, 2012 1:25 pm    Post subject: DevIL Reply with quote
I am trying to run this code and I keep getting a segmentation fault from ilLoadImage, I already checked, the function is not null. I alos tried a relative and absolute path! If I pass the result of toStringz to ilLoadImage, the same happens.

I am on 32bit archlinux, latest dmd (2.057), and derelict2-svn, 601 since the current fails to build.
Code:
make[1]: Entering directory `/tmp/yaourt-tmp-dav1d/aur-derelict2-svn/src/Derelict2/DerelictFT'
dmd -release -O -inline -lib -I../DerelictUtil derelict/freetype/ft.d derelict/freetype/ftfuncs.d derelict/freetype/fttypes.d -Hd/tmp/yaourt-tmp-dav1d/aur-derelict2-svn/pkg/usr/include/d2/derelict/freetype -oflibDerelictFT.a
derelict/freetype/ftfuncs.d(115): Error: undefined identifier FR_Face, did you mean alias FT_Face?


Code:
import derelict.opengl.gl;
import derelict.sdl.sdl;
import derelict.devil.il;
import derelict.devil.ilu;
import derelict.devil.ilut;
import derelict.util.exception;

static this() {
    DerelictSDL.load();
    DerelictGL.load();
    DerelictIL.load();
    DerelictILU.load();
    DerelictILUT.load();
}

struct TextureHandle {
    ILuint id;
    ILubyte* data;
    ILint width;
    ILint height;
   
    this(ILuint id_, ILubyte* d, ILint w, ILint h) {
        data = d;
        id = id_;
        width = w;
        height = h;
    }
}

TextureHandle load_image_devil(const(char)* filename) {
    //origin bottom left?
    ILuint id;
    ilGenImages(1, &id);
    ilBindImage(id);

    if(!ilLoadImage(filename)) {
        throw new Exception(format("loading the image \"%s\" failed!", filename));
    }
    writefln("before convert");
    ilConvertImage(IL_RGB, IL_UNSIGNED_BYTE);
   
    return TextureHandle(id, ilGetData(), ilGetInteger(IL_IMAGE_WIDTH), ilGetInteger(IL_IMAGE_HEIGHT));
}

void main() {TextureHandle t = load_image_devil("woodcrate.jpg"); }
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aldacron



Joined: 05 May 2004
Posts: 1322
Location: Seoul, South Korea
PostPosted: Wed Jan 18, 2012 11:07 pm    Post subject: Re: DevIL Reply with quote
dav1d wrote:
I am trying to run this code and I keep getting a segmentation fault from ilLoadImage, I already checked, the function is not null. I alos tried a relative and absolute path! If I pass the result of toStringz to ilLoadImage, the same happens.


In the code you posted, I don't see any call to ilInit. Perhaps that is the problem? You need to call that before attempting to load any images. The DevIL documentation says not doing so will almost certainly result in a crash. You'll also need to call iluInit and ilutInit if you plan to use those.

Quote:
I am on 32bit archlinux, latest dmd (2.057), and derelict2-svn, 601 since the current fails to build.


Sorry, my fault. I haven't tested the build after the last few updates. For future reference, though, you don't need to build everything if you only need a few packages. In this case you could have done this (as specified in the docs), rather than working with an older revision:

Code:

make -flinux.mak DC=dmd DerelictUtil DerelictGL DerelictSDL DerelictIL_ALL

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dav1d



Joined: 12 Sep 2011
Posts: 40
PostPosted: Thu Jan 19, 2012 11:38 am    Post subject: Reply with quote
Thanks, that was it!
=> DevIL documentation sucks…

Btw. I am using the AUR pkgbuild to build it.
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bioinfornatics



Joined: 22 Jun 2010
Posts: 90
PostPosted: Thu Jan 19, 2012 11:56 am    Post subject: Reply with quote
But it seem DevIL-ILUT do not exist on AUR
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dav1d



Joined: 12 Sep 2011
Posts: 40
PostPosted: Thu Jan 19, 2012 12:42 pm    Post subject: Reply with quote
Well, you've to use the ABS, if you need it.

https://bugs.archlinux.org/task/28001
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