Feature: add support for avif format

[icret]

A modern image format based on the AV1 video format. AVIF generally has better compression than WebP, JPEG, PNG and GIF and is designed to supersede them. AVIF competes with JPEG XL which has similar compression quality and is generally seen as more feature-rich than AVIF.

wikipedia
Browser support
function.imageavif.php

[verot]

Yes, it is a good idea, I will look into it.

Of course, feel free to submit a patch!

[iatila]

Is there conversion of heic and webp formats?

[verot]

WebP is supported. HEIC is not.

[rawiweb]

I have a workin upload.class with avif Support.
I don't know exactly if I did it entirely right but it creates avif files
Have fun

https://github.com/rawiweb/cutefiles/blob/main/assets/AvifSupport.patch
`
--- a/class.upload
+++ b/upload.class2
@@ -28,6 +28,7 @@
namespace Verot\Upload;

if (!defined('IMG_WEBP')) define('IMG_WEBP', 32);
+if (!defined('IMG_AVIF')) define('IMG_AVIF', 32);

@@ -1979,6 +1980,7 @@
'application/x-zip-compressed',
'application/zip',
'audio/*',

•        'video/*',
         'image/*',
         'multipart/x-gzip',
         'multipart/x-zip',
  

@@ -2005,6 +2007,7 @@
'png' => 'image/png',
'bmp' => 'image/bmp',
'flif' => 'image/flif',

•        'avif' => 'image/avif',
         'flv' => 'video/x-flv',
         'js' => 'application/x-javascript',
         'json' => 'application/json',
  

@@ -2033,6 +2036,9 @@
'mpe' => 'video/mpeg',
'mp3' => 'audio/mpeg3',
'mp4' => 'video/mp4',

•        'ogv' => 'video/ogv',
  

•        'webm' => 'video/webm',
  

•        'ogg' => 'audio/ogg',
         'wav' => 'audio/wav',
         'aiff' => 'audio/aiff',
         'aif' => 'audio/aiff',
  

@@ -2238,6 +2244,10 @@
$this->image_supported['image/webp'] = 'webp';
$this->image_supported['image/x-webp'] = 'webp';
}

•        if (imagetypes() & IMG_AVIF) {
  

•            $this->image_supported['image/avif'] = 'avif';
  

•        }
         if (imagetypes() & IMG_WBMP) {
             $this->image_supported['image/bmp'] = 'bmp';
             $this->image_supported['image/x-ms-bmp'] = 'bmp';
  

@@ -2259,7 +2269,9 @@
(in_array('webp', $this->image_supported) ? 'webp' : '') . ' ' .
(in_array('jpg', $this->image_supported) ? 'jpg' : '') . ' ' .
(in_array('gif', $this->image_supported) ? 'gif' : '') . ' ' .

•                             (in_array('bmp', $this->image_supported) ? 'bmp' : ''));
  

•                             (in_array('avif', $this->image_supported) ? 'avif' : '') . ' ' .
  

•                             (in_array('bmp', $this->image_supported) ? 'bmp' : '')
  

•                            );
         $this->log .= '-&nbsp;class version           : ' . $this->version . '<br />';
         $this->log .= '-&nbsp;operating system        : ' . PHP_OS . '<br />';
         $this->log .= '-&nbsp;PHP version             : ' . PHP_VERSION . '<br />';
  

@@ -3594,6 +3606,20 @@
}
}
break;

•                    case 'avif':
  

•                        if (!$this->function_enabled('imagecreatefromavif')) {
  

•                            $this->processed = false;
  

•                            $this->error = $this->translate('no_create_support', array('AVIF'));
  

•                        } else {
  

•                            $image_src = @imagecreatefromavif($this->file_src_pathname);
  

•                            if (!$image_src) {
  

•                                $this->processed = false;
  

•                                $this->error = $this->translate('create_error', array('AVIF'));
  

•                            } else {
  

•                                $this->log .= '- source image is AVIF<br />';
  

•                            }
  

•                        }
  

•                        break;
                     case 'gif':
                         if (!$this->function_enabled('imagecreatefromgif')) {
                             $this->processed = false;
  

@@ -4404,6 +4430,18 @@
$watermark_checked = true;
}
}

•                    }else if ($watermark_type == IMAGETYPE_AVIF) {
  

•                        if (!$this->function_enabled('imagecreatefromavif')) {
  

•                            $this->error = $this->translate('watermark_no_create_support', array('AVIF'));
  

•                        } else {
  

•                            $filter = @imagecreatefromavif($this->image_watermark);
  

•                            if (!$filter) {
  

•                                $this->error = $this->translate('watermark_create_error', array('AVIF'));
  

•                            } else {
  

•                                $this->log .= '&nbsp;&nbsp;&nbsp;&nbsp;watermark source image is AVIF<br />';
  

•                                $watermark_checked = true;
  

•                            }
  

•                        }
                     } else if ($watermark_type == IMAGETYPE_BMP) {
                         if (!method_exists($this, 'imagecreatefrombmp')) {
                             $this->error = $this->translate('watermark_no_create_support', array('BMP'));
  

@@ -5032,6 +5070,22 @@
$this->log .= '    GIF image created
';
}
break;

•                    case 'avif':
  

•                        if (!$return_mode) {
  

•                            $result = @imageavif($image_dst, $this->file_dst_pathname);
  

•                        } else {
  

•                            ob_start();
  

•                            $result = @imageavif($image_dst);
  

•                            $return_content = ob_get_contents();
  

•                            ob_end_clean();
  

•                        }
  

•                        if (!$result) {
  

•                            $this->processed = false;
  

•                            $this->error = $this->translate('file_create', array('AVIF'));
  

•                        } else {
  

•                            $this->log .= '&nbsp;&nbsp;&nbsp;&nbsp;AVIF image created<br />';
  

•                        }
  

•                        break;
  

\ No newline at end of file
case 'bmp':
if (!$return_mode) {
$result = $this->imagebmp($image_dst, $this->file_dst_pathname);

`