Bug: Compress image manipulation removes png image transparency

[ivanz040592]

I am using compress image from codeigniter 4 library with below code :

\Config\Services::image()->withFile($this->request->getFile('storeimage'))->reorient()->save('images/store/test.png', 70)

But it removes transparency png image. Can i compress png image without losses the transparency in ci 4?

I put below code in GDHanlder.php (save function) but it makes compress image not working, image size result still same and not compressed

imageAlphaBlending($this->resource, true);
imageSaveAlpha($this->resource, true);

case IMAGETYPE_PNG:
    imageAlphaBlending($this->resource, true);
    imageSaveAlpha($this->resource, true);

    if (! function_exists('imagepng'))
    {
        throw ImageException::forInvalidImageCreate(lang('images.pngNotSupported'));
    }

    if (! @imagepng($this->resource, $target))
    {
        throw ImageException::forSaveFailed();
    }
    break;

[kenjis]

@ivanz040592
Sorry for the delay in responding.

Try this:

--- a/system/Images/Handlers/GDHandler.php
+++ b/system/Images/Handlers/GDHandler.php
@@ -251,6 +251,9 @@ class GDHandler extends BaseHandler
                     throw ImageException::forInvalidImageCreate(lang('Images.pngNotSupported'));
                 }
 
+                imagealphablending($this->resource, false);
+                imagesavealpha($this->resource, true);
+
                 if (! @imagepng($this->resource, $target)) {
                     throw ImageException::forSaveFailed();
                 }

[kenjis]

This bug was fixed in the develop branch.
And it would be included in v4.2.0.