tests/phpunit/includes/media/JpegPixelFormatTest.php

   1 <?php
   2
   3 use MediaWiki\Shell\Shell;
   4
   5 /**
   6  * Tests related to JPEG chroma subsampling via $wgJpegPixelFormat setting.
   7  *
   8  * @group Media
   9  * @group medium
  10  */
  11 class JpegPixelFormatTest extends MediaWikiMediaTestCase {
  12
  13         protected function setUp() {
  14                 parent::setUp();
  15         }
  16
  17         /**
  18          * Mark this test as creating thumbnail files.
  19          */
  20         protected function createsThumbnails() {
  21                 return true;
  22         }
  23
  24         /**
  25          *
  26          * @dataProvider providePixelFormats
  27          * @covers BitmapHandler::imageMagickSubsampling
  28          */
  29         public function testPixelFormatRendering( $sourceFile, $pixelFormat, $samplingFactor ) {
  30                 global $wgUseImageMagick, $wgUseImageResize;
  31                 if ( !$wgUseImageMagick ) {
  32                         $this->markTestSkipped( "This test is only applicable when using ImageMagick thumbnailing" );
  33                 }
  34                 if ( !$wgUseImageResize ) {
  35                         $this->markTestSkipped( "This test is only applicable when using thumbnailing" );
  36                 }
  37
  38                 $fmtStr = var_export( $pixelFormat, true );
  39                 $this->setMwGlobals( 'wgJpegPixelFormat', $pixelFormat );
  40
  41                 $file = $this->dataFile( $sourceFile, 'image/jpeg' );
  42
  43                 $params = [
  44                         'width' => 320,
  45                 ];
  46                 $thumb = $file->transform( $params, File::RENDER_NOW | File::RENDER_FORCE );
  47                 $this->assertTrue( !$thumb->isError(), "created JPEG thumbnail for pixel format $fmtStr" );
  48
  49                 $path = $thumb->getLocalCopyPath();
  50                 $this->assertTrue( is_string( $path ), "path returned for JPEG thumbnail for $fmtStr" );
  51
  52                 $result = Shell::command( 'identify',
  53                         '-format',
  54                         '%[jpeg:sampling-factor]',
  55                         $path
  56                 )->execute();
  57                 $this->assertSame( 0,
  58                         $result->getExitCode(),
  59                         "ImageMagick's identify command should return success"
  60                 );
  61
  62                 $expected = $samplingFactor;
  63                 $actual = trim( $result->getStdout() );
  64                 $this->assertEquals(
  65                         $expected,
  66                         $actual,
  67                         "IM identify expects JPEG chroma subsampling \"$expected\" for $fmtStr"
  68                 );
  69         }
  70
  71         public static function providePixelFormats() {
  72                 return [
  73                         // From 4:4:4 source file
  74                         [
  75                                 'yuv444.jpg',
  76                                 false,
  77                                 '1x1,1x1,1x1'
  78                         ],
  79                         [
  80                                 'yuv444.jpg',
  81                                 'yuv444',
  82                                 '1x1,1x1,1x1'
  83                         ],
  84                         [
  85                                 'yuv444.jpg',
  86                                 'yuv422',
  87                                 '2x1,1x1,1x1'
  88                         ],
  89                         [
  90                                 'yuv444.jpg',
  91                                 'yuv420',
  92                                 '2x2,1x1,1x1'
  93                         ],
  94                         // From 4:2:0 source file
  95                         [
  96                                 'yuv420.jpg',
  97                                 false,
  98                                 '2x2,1x1,1x1'
  99                         ],
 100                         [
 101                                 'yuv420.jpg',
 102                                 'yuv444',
 103                                 '1x1,1x1,1x1'
 104                         ],
 105                         [
 106                                 'yuv420.jpg',
 107                                 'yuv422',
 108                                 '2x1,1x1,1x1'
 109                         ],
 110                         [
 111                                 'yuv420.jpg',
 112                                 'yuv420',
 113                                 '2x2,1x1,1x1'
 114                         ]
 115                 ];
 116         }
 117 }