SVG to PNG conversion transparent background

[adrianj]

Would really appreciate some help on this one please. I think should work, but I am still getting a white background.

Code: Select all

$imagickImage = new Imagick();
$imagickImage->readImage($path_to_svg);  
$imagickImage->setImageBackgroundColor(new ImagickPixel("transparent"));
$imagickImage->setImageFormat("png32");		
$imagickImage->writeImage($path_to_png);
$imagickImage->clear();
$imagickImage->destroy();

I have tested the following which creates a new image and it works fine, so it has something to do with creating a new image versus reading in an SVG, but I can't figure out what.

Code: Select all

$imagickImage = new Imagick();
$imagickImage->newImage(100, 100, new ImagickPixel("orange"));
$imagickImage->setImageBackgroundColor(new ImagickPixel("transparent"));
$imagickImage->waveImage(15, 200);
$imagickImage->trimImage(0);
$imagickImage->setImageFormat("png32");
$imagickImage->writeImage($path_to_png);
$imagickImage->clear();
$imagickImage->destroy();

Thanks for any ideas,
Adrian

[adrianj]

Surely someone must have done this at some point.

Would really appreciate any thoughts.

Thanks,
Adrian

[magick]

We wrote the MagickCore / MagickWand API and have not used Imagick. However, if Imagick has analogs to the MagickCore / MagickWand API, it would have a setBackgroundColor() method which you should insert just before the ReadImage() method. Also remove the call to setImageBackgroundColor().

[adrianj]

magick,

Thank you, that worked perfectly.

For those interested in where I went wrong. I had tried the following after the call to ReadImage().

Code: Select all

$imagickImage->setBackgroundColor(new ImagickPixel("transparent"));

I had also tried putting the following before the call to Readimage() which resulted in an error because the image didn't exist yet.

Code: Select all

$imagickImage->setImageBackgroundColor(new ImagickPixel("transparent"));

I never quite understood that I should/could set the background color of the "canvas"? before reading the image.

Thanks so much,
Adrian