Hi Joe,
thank you for your kind (as usual) answer.
I do not have my code handly (it is on the other portable computer), but
here what I've done (from memory and pseudo code)
create a new Picture (TargetPict)
get a RGBSurface for this picture (TargetSurf)
get a RGBSurface for the original picture (SourceSurf)
use x and y loops to get the pixel(s) something like
for x = 0 to PictWidth // I removed 1 to that value before the loop
for y = 0 to PictHeight // I removed 1 to that value before the loop
// Get a pixel color
aColor = SourceSurf.Pixel(x,y)
// Set a new / changed pixel color
TargetSurf.Pixel(x,y) cmy(aColor.Cyan,aColor.Cyan,0) // for example
next
next
Canvas1.Backdrop = TargetPict
Of course I checked UserCancelled in both loops...
I do not see where I can optimize the code...
TIA,
Emile
Subject: Re: Swap colors of a photo
From: [EMAIL PROTECTED]
Date: Thu, 8 Jun 2006 11:38:23 -0600
On Jun 08, 2006, at 16:37 UTC, Emile Schwarz wrote:
In other words, inside two nested loops, I use RGBSurface.Pixel, get a
part of its cmy values and use only Cyan, Magenta or Yellow in the
replaced (still with RGBSurface.Pixel) pixel and assign the new color to
the image. That process is slow.
Using RGBSurface.Transform works fine for Brightness / Darkness / Invert
and some other things, but I am in front of a wall for what I want to do
now.
You're right, .Transform can't do this sort of thing. But it's possible your
code could be optimized a bit; for example, if you're accessing
Picture.RGBSurface within the loop, it's most likely way slower than it needs
to be. Why not post the loop and see if we can spot any ways to help?
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