Re: [xwax-devel] xwax 0.6 beta compiled successfully on debian powerpc (ibook G4)

[Tom B. <to...@bl...>]

Just to add I noticed the same colour behaviour when testing under OS X on
my old G4 Powermac.  I noticed the colours were different but didn't really
think why at the time.

On Thu, Aug 27, 2009 at 10:27 AM, Karl Elsner <k_e...@we...> wrote:

> hi people,
>
> after lots of system-tuning (compiling rt-kernel 2.6.29.6 for powerpc and
> so on),
> i got xwax 0.6 to run properly on an ibook G4 (late 2004 | 1,33 Ghz | 1,25
> GiByte RAM).
> System is Debian 5.0.2 powerpc.
>
> It runs now very fine with a latency of 8 ms (sound-device: Vestax
> VCM-100), using Jack.
> I use 2 Numark Arc3 CD-Players and Serato-CDs for timecode-control.
> The CDs were burnt with Sony CD-architect, like Rane recommend on their
> homepage.
>
> The compile makes no problems, if you install the dependent packages, which
> are all
> available through apt-get or synaptic.
>
> BUT: there are problems with (libsdl-?) color-conversion, which IMHO have
> to do with endianness:
>
> The color of waveform comes very wrong: a dark red instead of blue - as
> dark as it coul be.
> Very difficult to have a look on details with this color. You can see the
> waveform, but not good
> and the color isn't really what you would call "fresh".
>
> The colors for "o.k." (green) and for "error" (red) are changed on powerpc.
>
> So what could i do? I have been a sysadmin for years and i know how to
> write any shell-script
> or php, but i never learned real programming (because in my job it was
> never necessary).
>
> But i'm not too stupid to have a look into c-code and find the place, where
> colors are defined.
>
> What i found whas the following snippet of code in "interface.c":
>
> SDL_Color background_col = {0, 0, 0, 255},
>    text_col = {224, 224, 224, 255},
>    warn_col = {192, 64, 0, 255},
>    ok_col = {32, 128, 3, 255},
>    elapsed_col = {0, 32, 255, 255},
>    remain_col = {0, 0, 64, 255},
>    cursor_col = {192, 0, 0, 255},
>    selected_col = {0, 48, 64, 255},
>    detail_col = {128, 128, 128, 255},
>    needle_col = {255, 255, 255, 255},
>    vinyl_col = {0, 0, 0, 255},
>    vinyl_ppm_col = {255, 255, 255, 255};
>
> O.k., for me this clearly seems to be the color-definitions.
>
> I had a long look onto google to find out, how to do the correct
> color-definitions
> for libsdl on powerpc, but did not find anything coherent for me :-/
>
> So i just tried it out, remembering, that because of endianness there could
> be
> another order of RGB-colors (i.e. "B-G-R" instead of "R-G-B"), but was not
> sure about it.
>
> I changed the code finally to the following:
>
>    SDL_Color background_col = {0, 0, 0},
>    text_col = {224, 224, 224},
>    warn_col = {0, 212, 0},
>    ok_col = {254, 0, 0},
>    elapsed_col = {128, 0, 0,},
>    remain_col = {0, 0, 255},
>    cursor_col = {224, 224, 224},
>    selected_col = {0, 0, 58},
>    detail_col = {128, 128, 128},
>    needle_col = {255, 255, 255},
>    vinyl_col = {0, 0, 0},
>    vinyl_ppm_col = {255, 255, 255};
>
> The result: i have know a fine-looking waveform in a light green, the
> elapsed color
> is a darker green, the cursor is white ... all colors o.k. for me to work
> with it.
>
> BUT: i could not get the waveform to be blue-colored, like it is on x86.
> Whatever i changed, the only colors i got for the waveform where green or
> red
> with different intensities. (dark red, light red, dark green, light green).
> If i tried to do "extreme values" (i.e. R: 0 G:0 B:255) the waveform turned
> into black!
> So black waveform on a black background .....
>
> like you can see, i completely removed 1 color-value per line (that was
> the value for "brightness" in my opinion), because i found out, that it was
> completely ignored
> on powerpc.
>
> Could it be, that the error has not directly to do with color-definition,
> but with definition of "o.k." and
> "not o.k." (green and red)?
>
> I hope, that my mail may help others who want to use xwax on powerpc.
>
> And i would be very glad if someone could give me a tip, how to get the
> waveform blue-colored.
>
> Sorry for this long mail, tried to get it short - but have to give enough
> info to make it understandable (?!).
>
> By the way: Big thanks for xwax, the finest tmecode-software i know! :-)
>
> Kind regards,
>
> Karl
>
>
>
> --
> Es gibt zwei Dinge, die unendlich sind, das Universum und
> die menschliche Dummheit, wobei ich mir beim Universum
> noch nicht ganz sicher bin. (Albert Einstein)
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