; Composite modes, by Pongo 10-26-07
; This code will let you composite multiple images together, using blending modes.
; There are different functions for the different modes, but they all work the same way
; Simply call the function with 2 images (front image first) or optionally use a 3rd image for an alpha mask.
; If you do not specify a mask image, the composite will work in "clip" mode, And cut out 0,0,0 black.
; Additionally, you can supply extra RGB values, and the top image will be tinted to that color. Run this example to see it all work.
; Note: This code requires all of the images to be the same pixel size.
; last updated 10-26 cleaned up a bit and fixed a problem with non-square images.
Graphics 640,480,0,2
SetBuffer BackBuffer()
SeedRnd MilliSecs()
;set the initial image
img_comp = compimage_mask("image1.png", "image2.png","mask.png")
info$ = "3) mask mode"
While Not KeyHit(1)
If KeyHit (2) ; 1 key
img_comp = compimage_mask("image1.png", "image2.png")
info$ = "1) clip mode"
EndIf
If KeyHit (3) ; 2 key
img_comp = compimage_mask("image1.png", "image2.png",0,Rnd(255),Rnd(255),Rnd(255) )
info$ = "2) clip mode tinted with random color"
EndIf
If KeyHit (4) ; 3 key
img_comp = compimage_mask("image1.png", "image2.png","mask.png")
info$ = "3) mask mode"
EndIf
If KeyHit (5) ;4 key
img_comp = compimage_mask("image1.png", "image2.png","mask.png",Rnd(255),Rnd(255),Rnd(255) )
info$ = "4) mask mode tinted with random color"
EndIf
If KeyHit (6) ; 5 key
img_comp = compimage_add("image1.png", "image2.png","mask.png")
info$ = "5) add mode"
EndIf
If KeyHit (7) ;6 key
img_comp = compimage_add("image1.png", "image2.png","mask.png",Rnd(255),Rnd(255),Rnd(255) )
info$ = "6) add mode tinted with random color"
EndIf
If KeyHit (8) ; 7 key
img_comp = compimage_multiply("image1.png", "image2.png","mask.png")
info$ = "7) multiply mode"
EndIf
If KeyHit (9) ;8 key
img_comp = compimage_multiply("image1.png", "image2.png","mask.png",Rnd(255),Rnd(255),Rnd(255) )
info$ = "8) multiply mode tinted with random color"
EndIf
If KeyHit (10) ; 9 key
img_comp = compimage_overlay("image1.png", "image2.png","mask.png")
info$ = "9) overlay mode"
EndIf
If KeyHit (11) ;0 key
img_comp = compimage_overlay("image1.png", "image2.png","mask.png",Rnd(255),Rnd(255),Rnd(255) )
info$ = "0) overlay mode tinted with random color"
EndIf
DrawImage img_comp,50,30
Text 325,15,"Press 1-0 to change blend modes"
Text 325,35,"1) Clip Mode"
Text 325,50,"2) Clip Mode Tinted"
Text 325,65,"3) Mask Mode"
Text 325,80,"4) Mask Mode Tinted"
Text 325,95,"5) Add Mode"
Text 325,110,"6) Add Mode Tinted"
Text 325,125,"7) Multiply Mode"
Text 325,140,"8) Multiply Mode Tinted"
Text 325,155,"9) Overlay Mode"
Text 325,170,"0) Overlay Mode Tinted"
Text 40,350,"current mode: " + info$
Flip
Cls
Wend ; end main loop
End ;end program
Function minmax#(value#,min#,max#)
If value > max Return max
If value < min Return min
Return value
End Function
Function compimage_mask(image1$, image2$, mask$=0, tint_R=255, tint_G=255, tint_B=255 )
Local img1,img2,maskimg,r,g,b,r2,g2,b2,r3,g3,b3,m_rgb,m#
;load the images and do error checks
img1 = LoadImage (image1)
If img1 = 0 Then RuntimeError "Image " + image1$ + " not found."
img2 = LoadImage (image2)
If img2 = 0 Then RuntimeError "Image " + image2$ + " not found."
If mask <> 0 Then
maskimg = LoadImage (mask)
If maskimg = 0 Then RuntimeError "Image " + mask$ + " not found."
EndIf
;lock the buffers for the pixel operations
LockBuffer (ImageBuffer(img1))
LockBuffer (ImageBuffer(img2))
If mask <> 0 Then LockBuffer (ImageBuffer(maskimg)) ;only lock mask buffer if this exists
;loop through the pixels
For y = 0 To ImageHeight(img1) -1
For x = 0 To ImageWidth(img1) -1
;read the RGB value of image1 and split the RGB values
rgb=ReadPixelFast(x,y,ImageBuffer(img1))
r=((rgb Shr 16) And $ff )
g=((rgb Shr 8) And $ff )
b=(rgb And $ff)
;read the RGB value of image2 and split the RGB values
rgb2=ReadPixelFast(x,y,ImageBuffer(img2))
r2=(rgb2 Shr 16) And $ff
g2=(rgb2 Shr 8) And $ff
b2=rgb2 And $ff
If mask = 0 ; no mask, so clip black values
If r+g+b>0 ;if the pixel is not black then tint it and copy to img2
r = minmax( r - (128 - tint_R Shr 1),0,255)
g = minmax( g - (128 - tint_G Shr 1),0,255)
b =minmax( b - (128 - tint_B Shr 1),0,255)
rgb=(b Or (g Shl 8) Or (r Shl 16) Or ($ff000000))
WritePixelFast(x,y,rgb,ImageBuffer(img2))
EndIf
Else ; mask is being used,... tint image1 and fade it into image2 using the mask
;first tint like before
r = minmax( r - ( 128 - tint_R Shr 1),0,255)
g = minmax( g - ( 128 - tint_G Shr 1),0,255)
b =minmax( b - ( 128 - tint_B Shr 1),0,255)
;read the RGB value of the mask image
m_rgb=ReadPixelFast(x,y,ImageBuffer(maskimg))
m =(((m_rgb Shr 16) And $ff ) + ((m_rgb Shr 8) And $ff ) + (m_rgb And $ff) )/ 3 ;get average of RGB values of matte
m= m /256 ;convert matte value from 0-255 to 0-1
;now blend img1 and img2 with the mask value
r3 = minmax ( r2 + ((r - r2)*m) ,0,255)
g3 = minmax ( g2 + ((g -g2)*m) ,0,255)
b3 = minmax ( b2 + ((b -b2)*m) ,0,255)
rgb=(b3 Or (g3 Shl 8) Or (r3 Shl 16) Or ($ff000000))
WritePixelFast(x,y,rgb,ImageBuffer(img2))
EndIf
Next
Next
UnlockBuffer (ImageBuffer(img1))
UnlockBuffer (ImageBuffer(img2))
If mask <> 0 Then UnlockBuffer (ImageBuffer(maskimg))
Return img2
End Function
Function compimage_add(image1$, image2$, mask$=0, tint_R=255, tint_G=255, tint_B=255)
Local img1,img2,maskimg,r,g,b,r2,g2,b2,r3,g3,b3,m_rgb,m#
;load the images and do error checks
img1 = LoadImage (image1)
If img1 = 0 Then RuntimeError "Image " + image1$ + " not found."
img2 = LoadImage (image2)
If img2 = 0 Then RuntimeError "Image " + image2$ + " not found."
If mask <> 0 Then
maskimg = LoadImage (mask)
If maskimg = 0 Then RuntimeError "Image " + mask$ + " not found."
EndIf
;lock the buffers for the pixel operations
LockBuffer (ImageBuffer(img1))
LockBuffer (ImageBuffer(img2))
If mask <> 0 Then LockBuffer (ImageBuffer(maskimg)) ;only lock mask buffer if this exists
;loop through the pixels
For y = 0 To ImageHeight(img1) -1
For x = 0 To ImageWidth(img1) -1
;read the RGB value of image1 and split the RGB values
rgb=ReadPixelFast(x,y,ImageBuffer(img1))
r=((rgb Shr 16) And $ff )
g=((rgb Shr 8) And $ff )
b=(rgb And $ff)
;read the RGB value of image2 and split the RGB values
rgb2=ReadPixelFast(x,y,ImageBuffer(img2))
r2=(rgb2 Shr 16) And $ff
g2=(rgb2 Shr 8) And $ff
b2=rgb2 And $ff
If mask = 0 ; no mask, so clip black values
If r+g+b>0 ;if the pixel is not black then tint it and copy to img2
r = minmax( (r+r2) - (128 - tint_R Shr 1),0,255)
g = minmax( (g+g2) - (128 - tint_G Shr 1),0,255)
b =minmax( (b+b2)- (128 - tint_B Shr 1),0,255)
rgb=(b Or (g Shl 8) Or (r Shl 16) Or ($ff000000))
WritePixelFast(x,y,rgb,ImageBuffer(img2))
EndIf
Else ; mask is being used,... tint image1 and fade it into image2 using the mask
;first tint like before
r = minmax( (r+r2 )- ( 128 - tint_R Shr 1),0,255)
g = minmax( (g+g2) - ( 128 - tint_G Shr 1),0,255)
b =minmax( (b+b2) - ( 128 - tint_B Shr 1),0,255)
;read the RGB value of the mask image
m_rgb=ReadPixelFast(x,y,ImageBuffer(maskimg))
m =(((m_rgb Shr 16) And $ff ) + ((m_rgb Shr 8) And $ff ) + (m_rgb And $ff) )/ 3 ;get average of RGB values of matte
m= m /256 ;convert matte value from 0-255 to 0-1
;now blend img1 and img2 with the mask value
r3 = minmax ( r2 + ((r - r2)*m) ,0,255)
g3 = minmax ( g2 + ((g -g2)*m) ,0,255)
b3 = minmax ( b2 + ((b -b2)*m) ,0,255)
rgb=(b3 Or (g3 Shl 8) Or (r3 Shl 16) Or ($ff000000))
WritePixelFast(x,y,rgb,ImageBuffer(img2))
EndIf
Next
Next
UnlockBuffer (ImageBuffer(img1))
UnlockBuffer (ImageBuffer(img2))
If mask <> 0 Then UnlockBuffer (ImageBuffer(maskimg))
Return img2
End Function
Function compimage_multiply(image1$, image2$, mask$=0, tint_R=255, tint_G=255, tint_B=255)
Local img1,img2,maskimg,r,g,b,r2,g2,b2,r3,g3,b3,m_rgb,m#
;load the images and do error checks
img1 = LoadImage (image1)
If img1 = 0 Then RuntimeError "Image " + image1$ + " not found."
img2 = LoadImage (image2)
If img2 = 0 Then RuntimeError "Image " + image2$ + " not found."
If mask <> 0 Then
maskimg = LoadImage (mask)
If maskimg = 0 Then RuntimeError "Image " + mask$ + " not found."
EndIf
;lock the buffers for the pixel operations
LockBuffer (ImageBuffer(img1))
LockBuffer (ImageBuffer(img2))
If mask <> 0 Then LockBuffer (ImageBuffer(maskimg)) ;only lock mask buffer if this exists
;loop through the pixels
For y = 0 To ImageHeight(img1) -1
For x = 0 To ImageWidth(img1) -1
;read the RGB value of image1 and split the RGB values
rgb=ReadPixelFast(x,y,ImageBuffer(img1))
r=((rgb Shr 16) And $ff )
g=((rgb Shr 8) And $ff )
b=(rgb And $ff)
;read the RGB value of image2 and split the RGB values
rgb2=ReadPixelFast(x,y,ImageBuffer(img2))
r2=(rgb2 Shr 16) And $ff
g2=(rgb2 Shr 8) And $ff
b2=rgb2 And $ff
If mask = 0 ; no mask, so clip black values
If r+g+b>0 ;if the pixel is not black then tint it and copy to img2
r = minmax( (r*r2)Shr 8 - (128 - tint_R Shr 1),0,255)
g = minmax( (g*g2)Shr 8 - (128 - tint_G Shr 1),0,255)
b =minmax( (b*b2)Shr 8 - (128 - tint_B Shr 1),0,255)
rgb=(b Or (g Shl 8) Or (r Shl 16) Or ($ff000000))
WritePixelFast(x,y,rgb,ImageBuffer(img2))
EndIf
Else ; mask is being used,... tint image1 and fade it into image2 using the mask
;first tint like before
r = minmax( (r*r2 )Shr 8- ( 128 - tint_R Shr 1),0,255)
g = minmax( (g*g2)Shr 8 - ( 128 - tint_G Shr 1),0,255)
b =minmax( (b*b2)Shr 8 - ( 128 - tint_B Shr 1),0,255)
;read the RGB value of the mask image
m_rgb=ReadPixelFast(x,y,ImageBuffer(maskimg))
m =(((m_rgb Shr 16) And $ff ) + ((m_rgb Shr 8) And $ff ) + (m_rgb And $ff) )/ 3 ;get average of RGB values of matte
m= m /256 ;convert matte value from 0-255 to 0-1
;now blend img1 and img2 with the mask value
r3 = minmax ( r2 + ((r - r2)*m) ,0,255)
g3 = minmax ( g2 + ((g -g2)*m) ,0,255)
b3 = minmax ( b2 + ((b -b2)*m) ,0,255)
rgb=(b3 Or (g3 Shl 8) Or (r3 Shl 16) Or ($ff000000))
WritePixelFast(x,y,rgb,ImageBuffer(img2))
EndIf
Next
Next
UnlockBuffer (ImageBuffer(img1))
UnlockBuffer (ImageBuffer(img2))
If mask <> 0 Then UnlockBuffer (ImageBuffer(maskimg))
Return img2
End Function
Function compimage_overlay(image1$, image2$, mask$=0, tint_R=255, tint_G=255, tint_B=255 )
Local img1,img2,r,g,b,r2,g2,b2,r3,g3,b3,tmp,m#
img1 = LoadImage (image1)
img2 = LoadImage (image2)
If mask <> 0 Then maskimg = LoadImage (mask)
LockBuffer (ImageBuffer(img1))
LockBuffer (ImageBuffer(img2))
If mask <> 0 Then LockBuffer (ImageBuffer(maskimg)) ;only lock mask buffer if this exists
For y = 0 To ImageHeight(img1) -1
For x = 0 To ImageWidth(img1) -1
rgb=ReadPixelFast(x,y,ImageBuffer(img1))
r = minmax( ((rgb Shr 16) And $ff) - (255 - tint_R),0,255)
g = minmax( ((rgb Shr 8) And $ff ) - (255 - tint_G),0,255)
b =minmax( (rgb And $ff) - (255 - tint_B),0,255)
rgb2=ReadPixelFast(x,y,ImageBuffer(img2))
r2=(rgb2 Shr 16) And $ff
g2=(rgb2 Shr 8) And $ff
b2=rgb2 And $ff
If mask = 0 ; no mask, so clip black values
If r+g+b>0 ;if the pixel is not black then tint it and copy to img2
r3 =minmax(255 - ((255-r) * (255 - r2) Shr 7),0,255)
g3 =minmax(255 - ((255-g) * (255 - g2) Shr 7),0,255)
b3 =minmax(255 - ((255-b) * (255 - b2) Shr 7),0,255)
rgb=(b3 Or (g3 Shl 8) Or (r3 Shl 16) Or ($ff000000))
WritePixelFast(x,y,rgb,ImageBuffer(img2))
EndIf
Else ; mask is being used,... tint image1 and fade it into image2 using the mask
r3 =minmax(255 - ((255-r) * (255 - r2) Shr 7),0,255)
g3 =minmax(255 - ((255-g) * (255 - g2) Shr 7),0,255)
b3 =minmax(255 - ((255-b) * (255 - b2) Shr 7),0,255)
;read the RGB value of the mask image
m_rgb=ReadPixelFast(x,y,ImageBuffer(maskimg))
m =(((m_rgb Shr 16) And $ff ) + ((m_rgb Shr 8) And $ff ) + (m_rgb And $ff) )/ 3 ;get average of RGB values of matte
m= m /256 ;convert matte value from 0-255 to 0-1
r = minmax ( r2 + ((r3 - r2)*m) ,0,255)
g = minmax ( g2 + ((g3 -g2)*m) ,0,255)
b = minmax ( b2 + ((b3 -b2)*m) ,0,255)
rgb=(b Or (g Shl 8) Or (r Shl 16) Or ($ff000000))
WritePixelFast(x,y,rgb,ImageBuffer(img2))
EndIf
Next
Next
UnlockBuffer (ImageBuffer(img1))
UnlockBuffer (ImageBuffer(img2))
If mask <> 0 Then UnlockBuffer (ImageBuffer(maskimg))
Return img2
End Function |
