Compress image with ci 4 library removes png transparency and Incorrect APP1 Exif

Compress image with ci 4 library removes png transparency and Incorrect APP1 Exif - Printable Version

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+--- Thread: Compress image with ci 4 library removes png transparency and Incorrect APP1 Exif (/showthread.php?tid=78481)

Compress image with ci 4 library removes png transparency and Incorrect APP1 Exif - Kohryu - 01-27-2021

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

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?

and also for some image i hit error below :
("exif_read_data(php3CBA.tmp):Incorrect APP1 Exif Identifier Code")

RE: Compress image with ci 4 library removes png transparency and Incorrect APP1 Exif - paulbalandan - 01-28-2021

If you are using v4.0.4 or below, there has already been a fix for this exif error in the develop branch. The next release will fix this.

RE: Compress image with ci 4 library removes png transparency and Incorrect APP1 Exif - Kohryu - 01-28-2021

(01-28-2021, 11:04 AM)paulbalandan Wrote: If you are using v4.0.4 or below, there has already been a fix for this exif error in the develop branch. The next release will fix this.

Noted with thanks.

How about the compress image?

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

Code:
imageAlphaBlending($this->resource, true);

imageSaveAlpha($this->resource, true);

Code:
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;

RE: Compress image with ci 4 library removes png transparency and Incorrect APP1 Exif - nahaK - 12-15-2024

You could try using a dedicated tool like png compressor alongside your CI 4 setup for compressing PNGs without losing transparency. It works well for maintaining quality and can complement your image handling process.