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  #1  
Old 17-Oct-2007, 21:14
Invincible Invincible is offline
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Fl_PNG_Image undefined reference

Hi everbody,

I am using fltk-1.1.7 , and i have configured it using --enable-threads and --enable-localpng but when I am trying to load png image using Fl_PNG_Image it is giving undefined reference

CPP / C++ / C Code:
In function `Fl_PNG_Image::Fl_PNG_Image(char const *)':
Fl_PNG_Image.o(.text+0x88): undefined reference to `png_create_read_struct'
Fl_PNG_Image.o(.text+0x90): undefined reference to `png_create_info_struct'
Fl_PNG_Image.o(.text+0xc8): undefined reference to `png_init_io'
Fl_PNG_Image.o(.text+0xd4): undefined reference to `png_read_info'
Fl_PNG_Image.o(.text+0xec): undefined reference to `png_set_expand'
Fl_PNG_Image.o(.text+0x148): undefined reference to `png_set_packing'
Fl_PNG_Image.o(.text+0x150): undefined reference to `png_set_expand'
Fl_PNG_Image.o(.text+0x178): undefined reference to `png_set_strip_16'
Fl_PNG_Image.o(.text+0x1fc): undefined reference to `png_set_interlace_handling'
Fl_PNG_Image.o(.text+0x220): undefined reference to `png_read_rows'
Fl_PNG_Image.o(.text+0x244): undefined reference to `png_read_end'
Fl_PNG_Image.o(.text+0x254): undefined reference to `png_destroy_read_struct'

I am stuck with this can anyone help me
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  #2  
Old 17-Oct-2007, 22:22
Invincible Invincible is offline
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Re: Fl_PNG_Image undefined reference

Problem is solved it was an error in make file
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  #3  
Old 22-Jun-2008, 10:15
kyramoon kyramoon is offline
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Re: Fl_PNG_Image undefined reference

Hi, can you tell about the problem and how you solved it?
I have a similar problem:
Code:
/tmp/cc9LPK7k.o: In function `__static_initialization_and_destruction_0(int, int)':
coloca_4_copia.cxx:(.text+0x12a): undefined reference to `Fl_PNG_Image::Fl_PNG_Image(char const*)'
coloca_4_copia.cxx:(.text+0x154): undefined reference to `Fl_PNG_Image::Fl_PNG_Image(char const*)'

Thanks
  #4  
Old 24-Jun-2008, 20:57
Invincible Invincible is offline
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Re: Fl_PNG_Image undefined reference

First you have to tell me which version you are using ?

If you are using fltk-1.1.7 ,just check your configuration .You need to configure your FLTK with PNG

I think this should work for you .

------------
good luck
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  #5  
Old 11-Feb-2009, 14:06
Newhunter Newhunter is offline
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Re: Fl_PNG_Image undefined reference

May you help me?

I am using FLTK 1.1.9 and I am trying to use PNG or JPEG images.

I already included the required libraries.

CPP / C++ / C Code:
GroupNovoImage = new Fl_Group(0,0,155,385);
	 GroupNovoImage->box(FL_GTK_UP_BOX);
	 fl_register_images(); 
	 Fl_PNG_Image png("mercurium01.png"); 
	 GroupNovoImage->image(png);
	 GroupNovoImage->end();

I've got the following error:

Code:
1>fltkimagesd.lib(Fl_PNG_Image.obj) : error LNK2019: unresolved external symbol _png_destroy_read_struct referenced in function "public: __thiscall Fl_PNG_Image::Fl_PNG_Image(char const *)" (??0Fl_PNG_Image@@QAE@PBD@Z)
1>fltkimagesd.lib(Fl_PNG_Image.obj) : error LNK2019: unresolved external symbol _png_read_end referenced in function "public: __thiscall Fl_PNG_Image::Fl_PNG_Image(char const *)" (??0Fl_PNG_Image@@QAE@PBD@Z)
1>fltkimagesd.lib(Fl_PNG_Image.obj) : error LNK2019: unresolved external symbol _png_read_rows referenced in function "public: __thiscall Fl_PNG_Image::Fl_PNG_Image(char const *)" (??0Fl_PNG_Image@@QAE@PBD@Z)
1>fltkimagesd.lib(Fl_PNG_Image.obj) : error LNK2019: unresolved external symbol _png_set_interlace_handling referenced in function "public: __thiscall Fl_PNG_Image::Fl_PNG_Image(char const *)" (??0Fl_PNG_Image@@QAE@PBD@Z)
1>fltkimagesd.lib(Fl_PNG_Image.obj) : error LNK2019: unresolved external symbol _png_set_tRNS_to_alpha referenced in function "public: __thiscall Fl_PNG_Image::Fl_PNG_Image(char const *)" (??0Fl_PNG_Image@@QAE@PBD@Z)
1>fltkimagesd.lib(Fl_PNG_Image.obj) : error LNK2019: unresolved external symbol _png_get_valid referenced in function "public: __thiscall Fl_PNG_Image::Fl_PNG_Image(char const *)" (??0Fl_PNG_Image@@QAE@PBD@Z)
1>fltkimagesd.lib(Fl_PNG_Image.obj) : error LNK2019: unresolved external symbol _png_set_strip_16 referenced in function "public: __thiscall Fl_PNG_Image::Fl_PNG_Image(char const *)" (??0Fl_PNG_Image@@QAE@PBD@Z)
1>fltkimagesd.lib(Fl_PNG_Image.obj) : error LNK2019: unresolved external symbol _png_set_packing referenced in function "public: __thiscall Fl_PNG_Image::Fl_PNG_Image(char const *)" (??0Fl_PNG_Image@@QAE@PBD@Z)
1>fltkimagesd.lib(Fl_PNG_Image.obj) : error LNK2019: unresolved external symbol _png_set_expand referenced in function "public: __thiscall Fl_PNG_Image::Fl_PNG_Image(char const *)" (??0Fl_PNG_Image@@QAE@PBD@Z)
1>fltkimagesd.lib(Fl_PNG_Image.obj) : error LNK2019: unresolved external symbol _png_read_info referenced in function "public: __thiscall Fl_PNG_Image::Fl_PNG_Image(char const *)" (??0Fl_PNG_Image@@QAE@PBD@Z)
1>fltkimagesd.lib(Fl_PNG_Image.obj) : error LNK2019: unresolved external symbol _png_init_io referenced in function "public: __thiscall Fl_PNG_Image::Fl_PNG_Image(char const *)" (??0Fl_PNG_Image@@QAE@PBD@Z)
1>fltkimagesd.lib(Fl_PNG_Image.obj) : error LNK2019: unresolved external symbol _png_create_info_struct referenced in function "public: __thiscall Fl_PNG_Image::Fl_PNG_Image(char const *)" (??0Fl_PNG_Image@@QAE@PBD@Z)
1>fltkimagesd.lib(Fl_PNG_Image.obj) : error LNK2019: unresolved external symbol _png_create_read_struct referenced in function "public: __thiscall Fl_PNG_Image::Fl_PNG_Image(char const *)" (??0Fl_PNG_Image@@QAE@PBD@Z)
1>C:\Documents and Settings\x\Meus documentos\Visual Studio 2005\Projects\Projeto_Modificado\Debug\Projeto.exe : fatal error LNK1120: 13 unresolved externals
1>Build log was saved at "file://c:\Documents and Settings\x\Meus documentos\Visual Studio 2005\Projects\Projeto_Modificado\Projeto\Debug\BuildLog.htm"
1>Projeto - 14 error(s), 0 warning(s)

What should I do to solve this problem?
  #6  
Old 11-Feb-2009, 15:50
Newhunter Newhunter is offline
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Re: Fl_PNG_Image undefined reference

I am using Visual Studio 2005 and I included the libraries:

fltkd.lib fltkjpegd.lib fltkimagesd.lib fltkzd.lib wsock32.lib comctl32.lib

Is there another library that I should include??
  #7  
Old 12-Feb-2009, 09:17
Newhunter Newhunter is offline
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Re: Fl_PNG_Image undefined reference

I solved this problem. It was because I forgot to include the fltkpngd.lib library.

But now, I've got a runtime error.

This code is compiling.

CPP / C++ / C Code:
 GroupNovoImage = new Fl_Group(0,0,155,385);
	 GroupNovoImage->box(FL_GTK_UP_BOX);
	 Fl_Box *box = new Fl_Box(0,0,155,385);
	 fl_register_images(); 
	 Fl_PNG_Image png("c:/Mercurium01.png"); 
	 box->image(png);
	 GroupNovoImage->end();

But the image isn't being loaded in the box. I've got this message:

Unhandled exception at 0x8910558b in Project.exe: 0xC0000005: Access violation reading location 0x8910558b.

And the program breaks because it can't import the image.

My question is: How should I import this image? The way I did is correct?

cheers,

Newhunter
  #8  
Old 12-Feb-2009, 18:33
Newhunter Newhunter is offline
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Re: Fl_PNG_Image undefined reference

I found the problem!

Now it is working:

CPP / C++ / C Code:
 GroupNovoImage = new Fl_Group(0,0,155,385);
	 GroupNovoImage->box(FL_GTK_UP_BOX);
	 Fl_Box *box = new Fl_Box(0,0,155,385);
	 fl_register_images();
	 Fl_PNG_Image *png = new Fl_PNG_Image("Mercurium01.png"); 
	 box->image(png);
	 GroupNovoImage->end();

I created a pointer of Fl_PNG_Image class because the image parameter should be a pointer. Now it is working very well.
  #9  
Old 22-Aug-2009, 13:57
uitrix uitrix is offline
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Re: Fl_PNG_Image undefined reference

Please, help me with this problem.. Still, I misunderstand why doesn't it working, when I'm trying to use this.. (And sorry for my bad eng ^^)

Trying to do this:

CPP / C++ / C Code:
fl_register_images();
Fl_PNG_Image * png = new Fl_PNG_Image("c:/asd.png");

And have this:

Code:
1>classes.obj : error LNK2019: unresolved external symbol "public: __thiscall Fl_PNG_Image::Fl_PNG_Image(char const *)" (??0Fl_PNG_Image@@QAE@PBD@Z) referenced in function "public: __thiscall CStart_Window::CStart_Window(void)" (??0CStart_Window@@QAE@XZ)
1>classes.obj : error LNK2019: unresolved external symbol "void __cdecl fl_register_images(void)" (?fl_register_images@@YAXXZ) referenced in function "public: __thiscall CStart_Window::CStart_Window(void)" (??0CStart_Window@@QAE@XZ)

Included libraries:
fltkd.lib wsock32.lib comctl32.lib fltkpngd.lib

I'm new in fltk, and do not know it well.. So, can't understand, why this happens =)
 
 
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