Legacy ImageMagick Discussions Archive

That's cool! I got it. Thus I don't have to use MagickCore API for that. Thank you so much!

'radial-gradient:inner-outer' is the name of the 'file' on the command line. So you can just do something like this:


size_t W=100;
size_t H=100;
Magick::Image img;
img.size(Geometry(W, H));
img.read("radial-gradient:purple-yellow");
img.write("result.png");


edit: Updated my example after Fred ...

I have tried to reproduce this:
convert -size WxH radial-gradient:inner-outer result
Here is a code I wrote that reproduces it:
void retrieveColor(Magick::PixelPacket& to, const Magick::Color& from)
{
to.blue = from.blueQuantum();
to.green = from.greenQuantum();
to.red = from.redQuantum();
to ...

Hey, guys!
I've been looking for any image gradients methods in the Magick++ API but I can't find anything. I need to add a radial gradient to an image. Although I found ImageGradient method in MagickCore API, but I haven't seen into it yet. Is there any method in Magick++ API that does what I want ...

UPD: Finally I have found a trial-and-error solution. I'm gonna put it here but first I need to figure out why when the negate option is disabled in my program but enabled in command-line and vice versa, I get the same result. Do you have any ideas?

I've already tried, but if I swap them, I will get wrong result in previous case (calling composite with default composition operator).

UPD: I have finally figured it out. There is no limitation. Let's examine this command:
convert background.jpg source.jpg mask.jpg -composite result.jpg
We have three images here - background, source and masking image which limit the area affected by the 'compose' method. Magick++ library provides ...

Here is the problem. I have a command:
convert background.jpg source.jpg mask.jpg -compose blend -define compose:args=50,50 - composite result.jpg
As you can see, there is a 'define' option in this command. I wrote a C++ program which let me do the same thing, but I don't know how to specify the ...

I will contact the IM developers and see if this is truly a limitation of Magick++. Perhaps they can make a change to the Magick++ composite.
But how does the convert program do it? It probably uses the same resources that Magick++ does. Today I have tried to figure it out but it's too complex for ...

What version of Imagemagick are you using and what platform? There should be no difference if you do them separately with a current version of IM. How are you specifying 'color'? As a name, as an rgb triplet or as a hex value?

With IM 6.9.1.1 Q16 Mac OSX, I get virtually the exact same results ...

Hello, guys!
There is a command:
convert original.jpg \( -clone 0 -fill 'color' -colorize 100% \) \( -clone 0 -colorspace gray -negate \) -composite output.jpg
So, I wonder how I can divide this command into separate pieces.
I know how to create these two additional images which where being cloned ...