How to achieve it by IM C API

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ospf
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How to achieve it by IM C API

Post by ospf » 2018-03-28T10:28:06-07:00

IM command:
convert test.png -alpha off \
-alpha set -fuzz 10% -fill none \
-draw "alpha 0,0 floodfill" \
-fill "rgba(255,255,255,1)" +opaque none \
-fill "rgba(0,0,0,1)" -opaque none \
-alpha off testDst.png



My question:
I'm a novice. How can I use IM C API on the above command, thanks.

snibgo
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Re: How to achieve it by IM C API

Post by snibgo » 2018-03-28T11:50:17-07:00

Which C API?
snibgo's IM pages: im.snibgo.com

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magick
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Re: How to achieve it by IM C API

Post by magick » 2018-03-28T15:31:55-07:00

There are two, MagickCore and MagickWand. We recommend MagickWand.

ospf
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Re: How to achieve it by IM C API

Post by ospf » 2018-03-28T18:50:00-07:00

thanks,What I mean is how to use an api to implement the function of a command and what functions to use. I tried but did not succeed, give some suggestions。

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fmw42
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Re: How to achieve it by IM C API

Post by fmw42 » 2018-03-28T19:41:49-07:00

You have to specify which C API you want to use; otherwise, no one can tell you the appropriate commands for that API. Also please identify your IM version and platform.

See the top-most post in this forum "IMPORTANT: Please Read This FIRST Before Posting" at http://www.imagemagick.org/discourse-se ... f=1&t=9620

ospf
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Re: How to achieve it by IM C API

Post by ospf » 2018-03-28T20:19:01-07:00

System:
linux IM: ImageMagick-7 API: magicwand by c

code:
PixelWand *fillColor = NewPixelWand();
PixelSetColor(fillColor, "rgba(0,0,0,1)");
PixelSetFuzz(fillColor, img.fuzzval);

DrawSetFillColor(drawImage, fillColor);
DrawAlpha(drawImage, 0, 0, FloodfillMethod);

MagickDrawImage(image, drawImage);
I want to get a mask of the image, the above code is applied to the image, get the largest border outside the black, how to reverse the transfer of the rest of the white

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