On wx-dev Mailing list Daniel walter wrote:

In jmorecfg.h boolean has a typedef as int which prevents jpegs from loading.  If I change this to unsigned char it works.

I am not sure exactly where this change should be made.  It would be nice to get boolean from the compiler to be compatible with C++ or maybe not use boolean in C code.

I am using Code Warrior for windows if this needs to be platform specific. This problem was quite a pain to find thougth as the first symptom was a seg fault and after digging deeper the next thing I got was struct sizes don't match, so it would be nice to prevent people porting to other compilers from finding this one the hard way.

-----------
I see the same bug with the image sample on loading the jpeg image
I tried debugging it but got in a tangle
chris

The problem is the structsize of jpeg_decompress_struct which differ between the jpeg-lib and wxwindows-lib. (464 vs 432)

To solve this change the file:

%WXIR%\src\jpeg\jconfig.h

and add the next define to line 5:
-----------------------<snip>-----------------------------------------
                                               VVVVVVVVVVVVVVVVVVVV
#if defined(_MSC_VER) || defined(__BORLANDC__) || defined (__DMC__)
#include "jconfig.vc"
#else
-----------------------<snip>-----------------------------------------

recompile the jpeglib and you should be fine.

Arjan Knepper

chris elliott wrote:
> On wx-dev Mailing list Daniel walter wrote:
> 
> In jmorecfg.h boolean has a typedef as int which prevents jpegs from
> loading.  If I change this to unsigned char it works.
> 
> I am not sure exactly where this change should be made.  It would be nice to
> get boolean from the compiler to be compatible with C++ or maybe not use
> boolean in C code.
> 
> I am using Code Warrior for windows if this needs to be platform specific.
> This problem was quite a pain to find thougth as the first symptom was a seg
> fault and after digging deeper the next thing I got was struct sizes don't
> match, so it would be nice to prevent people porting to other compilers from
> finding this one the hard way.
> 
> -----------
> I see the same bug with the image sample on loading the jpeg image
> I tried debugging it but got in a tangle
> chris
> 
> 

Thanks for finding this- I have fixed it in the CVS code
chris

Arjan Knepper wrote:

> The problem is the structsize of jpeg_decompress_struct which differ between the jpeg-lib and wxwindows-lib. (464 vs 432)
> 
> To solve this change the file:
> 
> %WXIR%\src\jpeg\jconfig.h
> 
> and add the next define to line 5:
> -----------------------<snip>-----------------------------------------
>                                                VVVVVVVVVVVVVVVVVVVV
> #if defined(_MSC_VER) || defined(__BORLANDC__) || defined (__DMC__)
> #include "jconfig.vc"
> #else
> -----------------------<snip>-----------------------------------------
> 
> recompile the jpeglib and you should be fine.
> 
> Arjan Knepper
> 
> chris elliott wrote:
> 
>> On wx-dev Mailing list Daniel walter wrote:
>>
>> In jmorecfg.h boolean has a typedef as int which prevents jpegs from
>> loading.  If I change this to unsigned char it works.
>>
>> I am not sure exactly where this change should be made.  It would be nice to
>> get boolean from the compiler to be compatible with C++ or maybe not use
>> boolean in C code.
>>
>> I am using Code Warrior for windows if this needs to be platform specific.
>> This problem was quite a pain to find thougth as the first symptom was a seg
>> fault and after digging deeper the next thing I got was struct sizes don't
>> match, so it would be nice to prevent people porting to other compilers from
>> finding this one the hard way.
>>
>> -----------
>> I see the same bug with the image sample on loading the jpeg image
>> I tried debugging it but got in a tangle
>> chris
>>
>>
>