Re: [Factor-talk] Transparent background texts and Windows Factor

[KUSUMOTO Norio]

Thank you, Alexander!
I will read it and study.

I tried the idea I wrote earlier. I've only tried a little, but it seems to 
work well.
Yay!





--
KUSUMOTO Norio



> 2019/05/30 20:19、Alexander Ilin のメール:
> 
> Hello!
> 
>  I think I have figured out the algorithm for the image processing. I'm not 
> sure
>  if it's the same one that you came up with.
> 
>  https://github.com/factor/factor/issues/152#issuecomment-497292323
> 
>  Also, I don't know if there are standard WinApi functions to perform the
>  necessary operation, namely copying a color channel into the alpha
>  channel, but I suspect there might be, in which case we won't lose
>  performance there.
> 
> 30.05.2019, 03:50, "KUSUMOTO Norio" :
>> Although it seems that to transfer the appropriate data to the device 
>> context is
>> the 'right' solution, I have a hunch that it will be a difficult task.
>> So I am beginning to think that we should take another, a cheat, approach.
>> 
>> It's like a chroma key. Uniscribe draws text with a color background instead 
>> of
>> transparency, and a word replaces the color with transparency when converting
>> from the bitmap to an Factor's image.
>> 
>> It may be slow, but we don't have many chances to draw characters on a 
>> transparent
>> background. And for example, on a button label, once Factor creates an image 
>> with
>> such characters, Factor use the image again, so I think there are few 
>> problems.
>> 
>> This approach can localize changes. I can't define the word for image 
>> conversion to do
>> such a special action, but I think that it's not a difficult task for 
>> someone familiar with
>> image processing words.
> 
> 
> ---=--- 
> Александр
> 
> 
> 
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Re: [Factor-talk] Transparent background texts and Windows Factor

[Alexander Ilin]

Hello!

  I think I have figured out the algorithm for the image processing. I'm not 
sure
  if it's the same one that you came up with.

  https://github.com/factor/factor/issues/152#issuecomment-497292323

  Also, I don't know if there are standard WinApi functions to perform the
  necessary operation, namely copying a color channel into the alpha
  channel, but I suspect there might be, in which case we won't lose
  performance there.

30.05.2019, 03:50, "KUSUMOTO Norio" :
> Although it seems that to transfer the appropriate data to the device context 
> is
> the 'right' solution, I have a hunch that it will be a difficult task.
> So I am beginning to think that we should take another, a cheat, approach.
>
> It's like a chroma key. Uniscribe draws text with a color background instead 
> of
> transparency, and a word replaces the color with transparency when converting
> from the bitmap to an Factor's image.
>
> It may be slow, but we don't have many chances to draw characters on a 
> transparent
> background. And for example, on a button label, once Factor creates an image 
> with
> such characters, Factor use the image again, so I think there are few 
> problems.
>
> This approach can localize changes. I can't define the word for image 
> conversion to do
> such a special action, but I think that it's not a difficult task for someone 
> familiar with
> image processing words.


---=--- 
 Александр



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