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Using new fonts on LM4F232 Eval Board

Wai Sing Ong
Prodigy 80 points

Hi,

I'm currently working on the LM4F232 Eval Board. I have trouble trying to use the Arial Font that I have converted using the ftrasterize tool.

I have successful converted the .ttf files to the C source. I have also place the converted C files into the Font folder in the grlib folder.

The codes that I use to display as follow:

//background widget
Canvas(g_sForeground, &g_sBackground, 0, 0 ,
&g_sCFAL96x64x16, 10, 10, 96, 64,
(CANVAS_STYLE_FILL | CANVAS_STYLE_TEXT | CANVAS_STYLE_TEXT_LEFT | CANVAS_STYLE_TEXT_TOP ),
ClrGreen, 0, ClrBlack,
g_sFontFont24, "Test", 0, 0);

However there are 3 errors:

Description Resource Path Location Type
#10010 errors encountered during linking; "GraphicsWidget.out" not GraphicsWidget C/C++ Problem
#10234-D</a> unresolved symbols remain GraphicsWidget C/C++ Problem
unresolved symbol g_sFontFont24, first referenced in ./main.obj GraphicsWidget C/C++ Problem

I am assuming there are some issues with the linking as I have also included the new font header in the grlib.h already.

  • 0
    TI__Mastermind 26900 points

    This is the kind of error I would expect if you failed to add the new font's C file to your project. If the C file is definitely in the list being linked, check the name of the font inside the file and make sure that it is "g_sFontFont24". Did you mean to type "FontFont", for example?

  • 0 in reply to Dave Wilson
    Prodigy 80 points

    Hi Dave,

    thanks for the advice. I have added into the project explorer. After fiddling with the codes, it turns out that I did not declared the following on the main c file:

    extern tFont gsFontFont24;

    Just another quick question, if I were to add in the following:

    extern const tFont g_sFontFont24;
    #define g_sFontFont24 (const tFont *)&g_sFontFont24

    in grlib.h, would it be possible? It is because I have tried adding that command in the grlib and it does not work and give me the same error as I have given. 

    Many thanks in advance!

    Wai Sing

     

  • 0 in reply to Wai Sing Ong
    TI__Mastermind 26900 points

    I suspect you have a basic misunderstanding of how C applications are built. You have added a new, application-specific resource to your project (your font) so you need to add references to it to some application-specific header file. This font is not part of the Stellaris graphics library so adding references to it in grlib.h would be a bad idea - as soon as you take a software update from us, your changes would be deleted and you would need to reapply them.

    If you have a header file for your application, add the extern reference to your font there along with all the other things that you need to share between application files. Note that the #define you provide will generate a compiler error. You can't #define a label that shares a name with a variable (g_sFontFont24 in this case).

    The original error you quoted indicated that you had not passed any file to the linker that contained the actual data for g_sFontFont24. The fix you mention here won't fix that If a missing extern reference had been the only problem, you would have seen a warning from the compiler but no error from the linker. The extern reference would fix this but unless you add a C file that contains the actual data for the font, your linker error will remain.

  • 0 in reply to Dave Wilson
    Prodigy 80 points

    Hi Dave,

    Thanks for the enlightenment! Will re-work my codes according to your instructions!

    Many thanks!

    Merry Christmas in advance!

    Wai Sing