tests/phpunit/includes/media/JpegPixelFormatTest.php

   1 <?php
   2 /**
   3  * Tests related to JPEG chroma subsampling via $wgJpegPixelFormat setting.
   4  *
   5  * @group Media
   6  * @group medium
   7  */
   8 class JpegPixelFormatTest extends MediaWikiMediaTestCase {
   9
  10         protected function setUp() {
  11                 parent::setUp();
  12         }
  13
  14         /**
  15          * Mark this test as creating thumbnail files.
  16          */
  17         protected function createsThumbnails() {
  18                 return true;
  19         }
  20
  21         /**
  22          *
  23          * @dataProvider providePixelFormats
  24          * @covers BitmapHandler::imageMagickSubsampling
  25          */
  26         public function testPixelFormatRendering( $sourceFile, $pixelFormat, $samplingFactor ) {
  27                 global $wgUseImageMagick, $wgUseImageResize;
  28                 if ( !$wgUseImageMagick ) {
  29                         $this->markTestSkipped( "This test is only applicable when using ImageMagick thumbnailing" );
  30                 }
  31                 if ( !$wgUseImageResize ) {
  32                         $this->markTestSkipped( "This test is only applicable when using thumbnailing" );
  33                 }
  34
  35                 $fmtStr = var_export( $pixelFormat, true );
  36                 $this->setMwGlobals( 'wgJpegPixelFormat', $pixelFormat );
  37
  38                 $file = $this->dataFile( $sourceFile, 'image/jpeg' );
  39
  40                 $params = [
  41                         'width' => 320,
  42                 ];
  43                 $thumb = $file->transform( $params, File::RENDER_NOW | File::RENDER_FORCE );
  44                 $this->assertTrue( !$thumb->isError(), "created JPEG thumbnail for pixel format $fmtStr" );
  45
  46                 $path = $thumb->getLocalCopyPath();
  47                 $this->assertTrue( is_string( $path ), "path returned for JPEG thumbnail for $fmtStr" );
  48
  49                 $cmd = [
  50                         'identify',
  51                         '-format',
  52                         '%[jpeg:sampling-factor]',
  53                         $path
  54                 ];
  55                 $retval = null;
  56                 $output = wfShellExec( $cmd, $retval );
  57                 $this->assertTrue( $retval === 0, "ImageMagick's identify command should return success" );
  58
  59                 $expected = $samplingFactor;
  60                 $actual = trim( $output );
  61                 $this->assertEquals(
  62                         $expected,
  63                         trim( $output ),
  64                         "IM identify expects JPEG chroma subsampling \"$expected\" for $fmtStr"
  65                 );
  66         }
  67
  68         public static function providePixelFormats() {
  69                 return [
  70                         // From 4:4:4 source file
  71                         [
  72                                 'yuv444.jpg',
  73                                 false,
  74                                 '1x1,1x1,1x1'
  75                         ],
  76                         [
  77                                 'yuv444.jpg',
  78                                 'yuv444',
  79                                 '1x1,1x1,1x1'
  80                         ],
  81                         [
  82                                 'yuv444.jpg',
  83                                 'yuv422',
  84                                 '2x1,1x1,1x1'
  85                         ],
  86                         [
  87                                 'yuv444.jpg',
  88                                 'yuv420',
  89                                 '2x2,1x1,1x1'
  90                         ],
  91                         // From 4:2:0 source file
  92                         [
  93                                 'yuv420.jpg',
  94                                 false,
  95                                 '2x2,1x1,1x1'
  96                         ],
  97                         [
  98                                 'yuv420.jpg',
  99                                 'yuv444',
 100                                 '1x1,1x1,1x1'
 101                         ],
 102                         [
 103                                 'yuv420.jpg',
 104                                 'yuv422',
 105                                 '2x1,1x1,1x1'
 106                         ],
 107                         [
 108                                 'yuv420.jpg',
 109                                 'yuv420',
 110                                 '2x2,1x1,1x1'
 111                         ]
 112                 ];
 113         }
 114 }