[C++ API] Convert svg to png with transparent background

[henrique]

Hi.

I'm new to ImageMagick, and I've been trying to use the C++ API to convert an SVG file to a PNG. The problem is that the resulting PNG file's background always defaults to white. I've been searching for solutions for this, but all I find is the solution using the comand line

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convert -background none svg_image.svg png_image.png

This command line does exactly what I want, but I can't seem to find a way to do it with the C++ API. Here is the code that I'm using to convert the image to PNG:

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Magick::Image svgImage(svgFilePath);
svgImage.magick("png");
Magick::Blob blob;
svgImage.write(&blob);

Is this possible to do and if so, how can I do it?

Thanks!

[magick]

Declare an image and set the background color, e.g. example.backgroundColor( "#000000FF" ); The use read() to read the image, e.g. example.read(svgFilePath).

[henrique]

Thanks. This worked

Just want to point out (in case anyone has the same problem) that the order in which you do things is important. I tried this solution specifying the PNG format first and then reading the SVG file (which is wrong). The correct order is as follows:

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Magick::Color c(0x0, 0x0, 0x0, 0xFFFF); // transparent
Magick::Image svgImage;
svgImage.backgroundColor(c);
svgImage.read(svgFilePath);  // first read file
svgImage.magick("png");  // then specify PNG format
Magick::Blob blob;
svgImage.write(&blob);

Once again, thanks for the help.