OK, it works now! I changed bgrx_converter and xrgb_converter (just
changed names) in file fl_draw_image.cxx an compiled it on the target.
Now the colors are correct.
Thanks for your help!
Michel Schmid schrieb:
> I haven't access to the target-system right now, but I made a short try at
> home... I changed the functions "bgrx_converter" and "xrgb_converter"
> in fl_draw_image and I have now the "wrong colors" like on the
> target-system. So if I do the same on the target-system, then maybe I will
> have the correct colors there.
>
> Thanks for you help guys!
>
>>> @ Nikita Egorov: What were your special workarounds?
>>>
>>> I want to use Pixmap and Bitmap (32bit)... It seems that somewhere the 4
>>> bytes (alpha-chanel included) are changed. Both pixmap and bitmap are
>>> shown in the wrong colors. But if i want to show white, it is yellow...
>>> For me that is a hint, that alphachanel is also exchanged with the
>>> color-bytes.
>>>
>>> Does anyone of you have an idea, where i have to make the change? I'm no
>>> very familiar with this "deep inside code" (but i hope one day i will be
>> 1) Sorry, I don't remember what exactly things were changed :-( I'll try to
>> explain. I was faced with the problem when I was making port FLTK to
>> DirectFB and I made a lot changes to expose correctly the colors . Alas,
>> all these changes worked unstable. Then I've removed all these fixes and
>> I've made my own version of DirectFB which supports twisted bytes. Though
>> some features remain in FLTK-DirectFB port. Thus, all these changes were
>> removed from original sources of FLTK.
>>
>> 2) I would recommend you try to change the xxx_converter() functions in
>> src/fl_draw_image.cxx. These functions are used to convert the image data
>> before the image will be put via XPutImage() (lines 522, 535 ). I suppose it
>> might be rgbx_coverter() or xbgr_converter() (line 314). Try to change bytes
>> order (ABGR=>GRBA) here or write your own simple function(s).
>>
>> I hope experienced FLTK developers will correct me if it need. Or they'll
>> give you other wise council.
>>
>> PS To reverse bytes within word/dword as fast as possible you can use
>> PowerPC's commands stwbrx/lwbrx. I've wrapped they into functions like that
>> (GCC):
>>
>> static inline void store_le32( u32 *addr, u32 val) {
>> __asm__ __volatile__("stwbrx %1,0,%2;n" : "=m" (*addr) :
>> "r" (val), "r" (addr));
>> }
>> See lines about 890 in
>> http://git.directfb.org/?p=ports/FLTK_1.x-DirectFB.git;a=blob;f=FL/xutils.h
>>
>
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