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Category:Action! Bitmap tools: Difference between revisions
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Line 249:
SetRgbPixel(img,x0+y,y0-x,c)
SetRgbPixel(img,x0-y,y0-x,c)
OD
RETURN
MODULE</lang>
----
=== RGB2GRAY.ACT ===
The following module is responsible for conversion from RGB color image into grayscale image.
<lang Action!>MODULE
INCLUDE "H6:GRIMAGE.ACT" ;from task Grayscale image
INCLUDE "D2:REAL.ACT" ;from the Action! Tool Kit
REAL rFact,gFact,bFact
PROC InitRgbToGray()
ValR("0.2126",rFact)
ValR("0.7152",gFact)
ValR("0.0722",bFact)
RETURN
BYTE FUNC Luminance(RGB POINTER c)
REAL r1,r2,r3
IntToReal(c.r,r1) ;r1=R
RealMult(rFact,r1,r2) ;r2=0.2126*R
IntToReal(c.g,r1) ;r1=G
RealMult(gFact,r1,r3) ;r3=0.7152*G
RealAdd(r2,r3,r1) ;r1=0.2126*R+0.7152*G
IntToReal(c.b,r2) ;r2=B
RealMult(bFact,r2,r3) ;r3=0.0722*B
RealAdd(r1,r3,r2) ;r2=0.2126*R+0.7152*G+0.0722*B
RETURN (RealToInt(r2))
PROC RgbToGray(RgbImage POINTER src GrayImage POINTER dst)
BYTE x,y,lum
RGB c
FOR y=0 TO dst.h-1
DO
FOR x=0 TO dst.w-1
DO
GetRgbPixel(src,x,y,c)
lum=Luminance(c)
SetGrayPixel(dst,x,y,lum)
OD
OD
RETURN
PROC GrayToRgb(GrayImage POINTER src RgbImage POINTER dst)
BYTE x,y,lum
RGB c
FOR y=0 TO dst.h-1
DO
FOR x=0 TO dst.w-1
DO
lum=GetGrayPixel(src,x,y)
c.r=lum c.g=lum c.b=lum
SetRgbPixel(dst,x,y,c)
OD
OD
RETURN
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INCLUDE "H6:GRIMAGE.ACT" ;from task Grayscale image
▲INCLUDE "D2:REAL.ACT" ;from the Action! Tool Kit
PROC DecodeSize(CHAR ARRAY s BYTE POINTER width,height)
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