48 int cropY;
49 int cropW;
50 int cropH;
51
52 /**
53 * Constructs a CropImageFilter that extracts the absolute rectangular
54 * region of pixels from its source Image as specified by the x, y,
55 * w, and h parameters.
56 * @param x the x location of the top of the rectangle to be extracted
57 * @param y the y location of the top of the rectangle to be extracted
58 * @param w the width of the rectangle to be extracted
59 * @param h the height of the rectangle to be extracted
60 */
61 public CropImageFilter(int x, int y, int w, int h) {
62 cropX = x;
63 cropY = y;
64 cropW = w;
65 cropH = h;
66 }
67
68 /**
69 * Passes along the properties from the source object after adding a
70 * property indicating the cropped region.
71 * This method invokes {@code super.setProperties},
72 * which might result in additional properties being added.
73 * <p>
74 * Note: This method is intended to be called by the
75 * {@code ImageProducer} of the {@code Image} whose pixels
76 * are being filtered. Developers using
77 * this class to filter pixels from an image should avoid calling
78 * this method directly since that operation could interfere
79 * with the filtering operation.
80 */
81 public void setProperties(Hashtable<?,?> props) {
82 @SuppressWarnings("unchecked")
83 Hashtable<Object,Object> p = (Hashtable<Object,Object>)props.clone();
84 p.put("croprect", new Rectangle(cropX, cropY, cropW, cropH));
85 super.setProperties(p);
86 }
87
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48 int cropY;
49 int cropW;
50 int cropH;
51
52 /**
53 * Constructs a CropImageFilter that extracts the absolute rectangular
54 * region of pixels from its source Image as specified by the x, y,
55 * w, and h parameters.
56 * @param x the x location of the top of the rectangle to be extracted
57 * @param y the y location of the top of the rectangle to be extracted
58 * @param w the width of the rectangle to be extracted
59 * @param h the height of the rectangle to be extracted
60 */
61 public CropImageFilter(int x, int y, int w, int h) {
62 cropX = x;
63 cropY = y;
64 cropW = w;
65 cropH = h;
66 }
67
68 @Override
69 public ImageFilter getScaledFilterInstance(double scaleX, double scaleY) {
70 Object instance = super.getScaledFilterInstance(scaleX, scaleY);
71 CropImageFilter filter = (CropImageFilter) instance;
72 filter.cropX = (int) Math.ceil(cropX * scaleX);
73 filter.cropY = (int) Math.ceil(cropY * scaleY);
74 filter.cropW = (int) Math.floor(cropW * scaleX);
75 filter.cropH = (int) Math.floor(cropH * scaleY);
76 return filter;
77 }
78
79 /**
80 * Passes along the properties from the source object after adding a
81 * property indicating the cropped region.
82 * This method invokes {@code super.setProperties},
83 * which might result in additional properties being added.
84 * <p>
85 * Note: This method is intended to be called by the
86 * {@code ImageProducer} of the {@code Image} whose pixels
87 * are being filtered. Developers using
88 * this class to filter pixels from an image should avoid calling
89 * this method directly since that operation could interfere
90 * with the filtering operation.
91 */
92 public void setProperties(Hashtable<?,?> props) {
93 @SuppressWarnings("unchecked")
94 Hashtable<Object,Object> p = (Hashtable<Object,Object>)props.clone();
95 p.put("croprect", new Rectangle(cropX, cropY, cropW, cropH));
96 super.setProperties(p);
97 }
98
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