would someone be so kind?

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RedGhost

Joined: 18 May 2005
Posts: 443
Location: BC, Canada

RedGhost 21 May 2005, 16:08

as to convert this for me? Smile

Code:

//WINGDI.H

#define GetRValue(rgb)      ((BYTE)(rgb))
#define GetGValue(rgb)      ((BYTE)(((WORD)(rgb)) >> 8))
#define GetBValue(rgb)      ((BYTE)((rgb)>>16))

thanks in advance !

21 May 2005, 16:08

vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia

vid 21 May 2005, 17:30

there isn't anything line inline macro in FASM.
But generally:
eax = GetRValue(eax); -> and eax,0FFh
eax = GetGValue(eax); -> shr eax,8; and eax,0FFh
eax = GetBValue(eax); -> shr eax,16; and eax,0FFh
eax = GetRValue([variable]); -> movzx eax,byte [variable]
eax = GetGValue([variable]); -> movzx eax,byte [variable+1]
eax = GetBValue([variable]); -> movzx eax,byte [variable+2]

21 May 2005, 17:30

bogdanontanu

Joined: 07 Jan 2004
Posts: 403
Location: Sol. Earth. Europe. Romania. Bucuresti

bogdanontanu 21 May 2005, 18:00

However in TASM it would look like this:

GetRValue MACRO aRGB
mov eax,aRGB
and eax,0ffh
ENDM

GetGValue MACRO aRGB
mov eax,aRGB
shr eax,8
and eax,0ffh
ENDM

GetBValue MACRO aRGB
mov eax,aRGB
shr eax,16
and eax,0ffh
ENDM

And if you do not need the return in EAX you could do the operations directly on aRGB argument.

21 May 2005, 18:00

Nikolay Petrov

Joined: 22 Apr 2004
Posts: 101
Location: Bulgaria

Nikolay Petrov 22 May 2005, 17:24

"<<" -> shl
">>" -> shr
char -> byte
short -> word
....

basic C programing

Prevision post take it details

22 May 2005, 17:24

RedGhost

Joined: 18 May 2005
Posts: 443
Location: BC, Canada

RedGhost 23 May 2005, 16:52

Nickolay wrote:

"<<" -> shl
">>" -> shr
char -> byte
short -> word
....

basic C programing

Prevision post take it details

just had never used >> or << in c, thanks guys!

23 May 2005, 16:52

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