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I'm playing with Gilles Tran MakeCloud macro, and the output from tga2df3 didn't
look like a cloud.
After some investigation I found that the TGA output file is confused.
When I use -UA, povray says: makecloud2001.tga, 24 bpp Targa, but the output
file contains an alpha channel (every fourth byte is 0xFF).
When I use +UA, povray says: makecloud2001.tga, 32 bpp with alpha Targa, but
this time I don't have the alpha channel, and tga2df3 generates a cloud.
My povray version is POV-Ray 3.8.0-x.10064738.unofficial, and UberPOV 1.37.1.0
has the same problem.
I couldn't find any mention of this in the newsgroups, but if people are aware
then I apologize for rubbing it in again.
Cheers
Ton.
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On 2/5/21 7:41 PM, Ton wrote:
> I'm playing with Gilles Tran MakeCloud macro, and the output from tga2df3 didn't
> look like a cloud.
> After some investigation I found that the TGA output file is confused.
> When I use -UA, povray says: makecloud2001.tga, 24 bpp Targa, but the output
> file contains an alpha channel (every fourth byte is 0xFF).
> When I use +UA, povray says: makecloud2001.tga, 32 bpp with alpha Targa, but
> this time I don't have the alpha channel, and tga2df3 generates a cloud.
>
> My povray version is POV-Ray 3.8.0-x.10064738.unofficial, and UberPOV 1.37.1.0
> has the same problem.
>
I believe I see it in my povr branch based off v3.8.
To a quick verification .png output is OK, but .tga files look backward
to the +UA/-UA control... The reported information looks too at the
control setting and not at what actually got written.
I'm tired. I'll try and run the issue down tomorrow.
Bill P.
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On 2/6/21 3:06 PM, William F Pokorny wrote:
> On 2/5/21 7:41 PM, Ton wrote:
...
>> When I use +UA, povray says: makecloud2001.tga, 32 bpp with alpha
>> Targa, but
>> this time I don't have the alpha channel, and tga2df3 generates a cloud.
>>
...
>
> I believe I see it in my povr branch based off v3.8.
>
...
> I'm tired. I'll try and run the issue down tomorrow.
>
As bugs go, a relatively easy one. :-)
In the file: source/base/image/targa.cpp and the function Write:
bool opaque = options.AlphaIsEnabled();
should be:
bool opaque = !options.AlphaIsEnabled();
Bill P.
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William F Pokorny <ano### [at] anonymous org> wrote:
>
> As bugs go, a relatively easy one. :-)
>
> In the file: source/base/image/targa.cpp and the function Write:
>
> bool opaque = options.AlphaIsEnabled();
>
> should be:
>
> bool opaque = !options.AlphaIsEnabled();
>
> Bill P.
That sure was a simple solution, thanks Bill.
Cheers
Ton.
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Am 07.02.2021 um 12:08 schrieb William F Pokorny:
> As bugs go, a relatively easy one. :-)
It sure must have been hard work to create it in the first place... I
have no idea how _that_ happened.
> In the file: source/base/image/targa.cpp and the function Write:
>
> bool opaque = options.AlphaIsEnabled();
>
> should be:
>
> bool opaque = !options.AlphaIsEnabled();
Thanks. Confirming both diagnosis and remedy.
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