[lazarus] Wrong colours in win32

[Micha Nelissen]

Mattias Gaertner wrote:

> On Sat, 29 Nov 2003 18:17:56 +0100  Micha Nelissen
> <M.Nelissen at student.tue.nl> wrote:
> 
> 
>>Micha Nelissen wrote:
>>
>>
>>>Very recently colours are wrong on win32. It happens only when using 
>>>-dUseFPImage. I think it has to do with recent "fpImage streaming fixed"
>>>
>>>which I saw in the logs? AFAICS, no colour related things have changed 
>>>in the win32 interface.
>>
>>Okay, the colours still aren't correct :-(. They are correct if I set my 
>>desktop depth to 32 bit. At 16 bit it doesn't work. Don't know about 24 
>>bit, my video card doesn't support that. Mattias, could you look into 24 
>>to 16 bit conversion of images? I guess that has to do with it.
> 
> 
> The 24 of the image is irrelevant. 
> If the 16 bit writing does not work, then 
> - either the win32 intf has set the wrong shift and prec values 
> - or WriteRawImageBits in intfgraphics.pas for BitsPerPixel=16 has to change
> lo and hi byte.
> 
> The 5 lines in WriteRawImageBits simply replace some bits of a word. 
> If you think, that the win32 intf has set the right values then you can try
> to replace
>   TwoBytes:=PWord(P)^;
> with
>   TwoBytes:=(PByte(P)^ shl 8)+PByte(P)^;
> 
> 
> The only way to make sure: I suggest you create a bitmap in 16 bit mode,
> paint it red, then green, then blue and read the first word, to see how
> windows manages colors.

Is there a way to get the lazarus logo as file, lazarus.xpm or so? Then 
I can make a seperate test app, debugging the ide is quite a lot of code 
;-).

Micha.