Node.js GM quality() Function
Last Updated :
30 Mar, 2023
The quality() function is an inbuilt function in the GraphicsMagick library which is used for JPEG/MIFF/PNG/TIFF compression levels. If the filter type is 4 or less, the specified filter type is used for all scanlines:0: none, 1: sub, 2: up, 3: average, 4: Path. The function returns the true value on success.
Syntax:
quality( level )
Parameters: This function accepts a single parameter which is mentioned above and defined below:
- level: This parameter is used to specify the level of the quality.
Return Value: This function returns the GraphicsMagick object.
Example 1:
javascript
const gm = require( 'gm' );
gm( '1.png' )
.quality(3)
.write( "quality1.png" , function (err) {
if (!err) console.log( 'done' );
});
|
Output:
Example 2:
javascript
const gm = require( 'gm' );
gm(600, 300, 'white' )
.stroke( "green" , 3)
.font( "Helvetica.ttf" , 60)
.drawText(100, 280, "GeeksforGeeks!" )
.quality(1)
.write( "quality2.png" , function (err) {
if (!err) console.log( 'done' );
});
|
Output:
Reference:
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