JpegPixelFormatTest.php

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<?php
class JpegPixelFormatTest extends MediaWikiMediaTestCase {
 
    protected function setUp() {
        parent::setUp();
    }
 
    protected function createsThumbnails() {
        return true;
    }
 
    public function testPixelFormatRendering( $sourceFile, $pixelFormat, $samplingFactor ) {
        global $wgUseImageMagick, $wgUseImageResize;
        if ( !$wgUseImageMagick ) {
            $this->markTestSkipped( "This test is only applicable when using ImageMagick thumbnailing" );
        }
        if ( !$wgUseImageResize ) {
            $this->markTestSkipped( "This test is only applicable when using thumbnailing" );
        }
 
        $fmtStr = var_export( $pixelFormat, true );
        $this->setMwGlobals( 'wgJpegPixelFormat', $pixelFormat );
 
        $file = $this->dataFile( $sourceFile, 'image/jpeg' );
 
        $params = [
            'width' => 320,
        ];
        $thumb = $file->transform( $params, File::RENDER_NOW | File::RENDER_FORCE );
        $this->assertTrue( !$thumb->isError(), "created JPEG thumbnail for pixel format $fmtStr" );
 
        $path = $thumb->getLocalCopyPath();
        $this->assertTrue( is_string( $path ), "path returned for JPEG thumbnail for $fmtStr" );
 
        $cmd = [
            'identify',
            '-format',
            '%[jpeg:sampling-factor]',
            $path
        ];
        $retval = null;
        $output = wfShellExec( $cmd, $retval );
        $this->assertTrue( $retval === 0, "ImageMagick's identify command should return success" );
 
        $expected = $samplingFactor;
        $actual = trim( $output );
        $this->assertEquals(
            $expected,
            trim( $output ),
            "IM identify expects JPEG chroma subsampling \"$expected\" for $fmtStr"
        );
    }
 
    public static function providePixelFormats() {
        return [
            // From 4:4:4 source file
            [
                'yuv444.jpg',
                false,
                '1x1,1x1,1x1'
            ],
            [
                'yuv444.jpg',
                'yuv444',
                '1x1,1x1,1x1'
            ],
            [
                'yuv444.jpg',
                'yuv422',
                '2x1,1x1,1x1'
            ],
            [
                'yuv444.jpg',
                'yuv420',
                '2x2,1x1,1x1'
            ],
            // From 4:2:0 source file
            [
                'yuv420.jpg',
                false,
                '2x2,1x1,1x1'
            ],
            [
                'yuv420.jpg',
                'yuv444',
                '1x1,1x1,1x1'
            ],
            [
                'yuv420.jpg',
                'yuv422',
                '2x1,1x1,1x1'
            ],
            [
                'yuv420.jpg',
                'yuv420',
                '2x2,1x1,1x1'
            ]
        ];
    }
}