Legacy ImageMagick Discussions Archive

Thanks for the reply. I built it with "./configure --disable-openmp" but I had no luck. Width/height are: 720x1280, 300x400, 700x600 :) I tested many images. There's no any problem with those images :)

BUT: It looks like the problem with my system only. Looks like CUDA driver in MacOS is broken. So ...

I'm using:
Mac OS X 10.12.5
NVidia GTX 980
CUDA-Z sees my GPU without any problem.

$ magick --version
Version: ImageMagick 7.0.6-7 Q16 x86_64 2017-08-12 http://www.imagemagick.org
Copyright: © 1999-2017 ImageMagick Studio LLC
License: http://www.imagemagick.org/script/license.php
Features: Cipher ...

Well I can use another ttf file for setting italic style of setting new font weight but what to do with the TextInterlineSpacing? It doesn't work in both cases...

Magick::Image image( Magick::Geometry( 300, 300 ), Magick::Color( "white" ) );

std::vector < Magick::Drawable > textArr;

textArr.push_back( Magick::DrawablePointSize( 70 ) );
textArr.push_back( Magick::DrawableTextInterlineSpacing( 0.1f ) );
textArr.push_back( Magick::DrawableGravity ...

snibgo wrote: 2017-04-28T20:46:23-07:00 For drawing text, as opposed to other methods, I suppose you should use methods on http://www.imagemagick.org/Magick++/Drawable.html such as DrawableFont.

Well maybe. But for what purposes developers created those methods such as fontStyle(), fontWeight(), textInterlineSpacing()?

Here is my code: Magick::Image image( Magick::Geometry( 700, 700 ), Magick::Color( "white" ) );

image.font( "verdana" );
image.fontPointsize( 70 );

image.fontWeight( 900 );
image.fontStyle( Magick::ItalicStyle );
image.textInterlineSpacing( 0.1f );

image.textGravity( MagickCore ...

If I use just:
I see the generated thumbnail (yellow background) for that file in my OS.

I've just updated my IM to 7.0.5-4 (previously I used 7.0.5-2) and now I see the code:


Magick::Image testImg( Magick::Geometry( 500, 500 ), Magick::Color( "white" ) );
testImg.fx( "i/w" );
testImg.write( "images/test-img.png" );

generates a vertical gradient from black to white (from left to ...

Oh finally I've got it. You mean simply masks technique. Now I understand what did you mean.
Here is the way for doing this:

Magick::Image gradImg( Magick::Geometry( 500, 500 ), Magick::Color( "white" ) );
gradImg.read( "gradient:red-blue" );

Magick::Image maskImg( Magick::Geometry( 500, 500 ...

For translating between command-line and C (or C++), a very useful source is MagickCore\option.c. This file translates command-line options to the internals. Search that file for "CopyOpacity".

Thanks, it's very useful file! :) Didn't know about it. Now I know that ColorizeCompositeOp is the ...

1. What do the "-alpha off" command do? Is it just remove the alpha channel from an image?

2. I try to convert it to C++ so I did:
Magick::Image gradImg( Magick::Geometry( 500, 500 ), Magick::Color( "white" ) );
gradImg.read( "gradient:red-blue" );

Magick::Image testImg( Magick::Geometry( 500 ...

Wow that works really cool but how to convert it to Magick++ format? :)

The first problem is with the colorize function. I see two definitions of colorize function:

// Colorize image with pen color, using specified percent alpha.
void colorize(const unsigned int alpha_,const Color &penColor ...

Not directly. It can be made transparent, and the image then composited over a gradient image.

Such an interesting technique. You mean I can draw a primitive with a transparent fill and put that primitive over the gradient image? Do I need to have a white background outside the primitive? Then ...

I suggest you upload the broken PNG file so someone can take a look.

Sure. This my broken png file: https://ufile.io/vv7ya

Code:
Magick::Image testImg( Magick::Geometry( 500, 500 ), Magick::Color( "white" ) );
testImg.fx( "i/w" );
testImg.write( "images/test-img.png" );



I don't know what ...