src/main/java/org/gm4java/im4java/GMOperation.java
public GMOperation source(final File file, @CheckForNull final Integer width, @CheckForNull final Integer height)
            throws IOException {
        if (file != null && !file.exists()) {
            throw new IOException("Source file '" + file + "' does not exist");
        }
        if ((width != null) && (height != null) && (width > 0) && (height > 0)) {
            size(width, height);
        }
        return addImage(file);
    }
public GMOperation source(final File file, @CheckForNull final Integer width, @CheckForNull final Integer height)
            throws IOException {
        if (file != null && !file.exists()) {
            throw new IOException("Source file '" + file + "' does not exist");
        }
        if ((width != null) && (height != null) && (width > 0) && (height > 0)) {
            size(width, height);
        }
        return addImage(file);
    }
public GMOperation source ( final File file , @ CheckForNull final Integer width , @ CheckForNull final Integer height ) throws IOException { if ( file != null && ! file . exists ( ) ) { throw new IOException ( "Source file '" + file + "' does not exist" ) ; } if ( ( width != null ) && ( height != null ) && ( width > 0 ) && ( height > 0 ) ) { size ( width , height ) ; } return addImage ( file ) ; }
Specifies the source image to convert.

@param file
Source image file to convert.
@param width
Length in pixels of the source image's width; if {@code null} or negative, the in-memory size
definition is omitted. Optional.
@param height
Length in pixels of the source image's height; if {@code null} or negative, the in-memory size
definition is omitted. Optional.
@return Builder object for chained options setup.
@throws IOException
when the source file does not exist.
Specifies the source image to convert .