63 }
64
65 public static ImageObserver getResolutionVariantObserver(
66 final Image image, final ImageObserver observer,
67 final int imgWidth, final int imgHeight,
68 final int rvWidth, final int rvHeight) {
69 return getResolutionVariantObserver(image, observer,
70 imgWidth, imgHeight, rvWidth, rvHeight, false);
71 }
72
73 public static ImageObserver getResolutionVariantObserver(
74 final Image image, final ImageObserver observer,
75 final int imgWidth, final int imgHeight,
76 final int rvWidth, final int rvHeight, boolean concatenateInfo) {
77
78 if (observer == null) {
79 return null;
80 }
81
82 synchronized (ObserverCache.INSTANCE) {
83 ImageObserver o = (ImageObserver) ObserverCache.INSTANCE.get(image);
84
85 if (o == null) {
86
87 o = (Image resolutionVariant, int flags,
88 int x, int y, int width, int height) -> {
89
90 if ((flags & (ImageObserver.WIDTH | BITS_INFO)) != 0) {
91 width = (width + 1) / 2;
92 }
93
94 if ((flags & (ImageObserver.HEIGHT | BITS_INFO)) != 0) {
95 height = (height + 1) / 2;
96 }
97
98 if ((flags & BITS_INFO) != 0) {
99 x /= 2;
100 y /= 2;
101 }
102
103 if(concatenateInfo){
104 flags &= ((ToolkitImage) image).
105 getImageRep().check(null);
106 }
107
108 return observer.imageUpdate(
109 image, flags, x, y, width, height);
110 };
111
112 ObserverCache.INSTANCE.put(image, o);
113 }
114 return o;
115 }
116 }
117 }
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63 }
64
65 public static ImageObserver getResolutionVariantObserver(
66 final Image image, final ImageObserver observer,
67 final int imgWidth, final int imgHeight,
68 final int rvWidth, final int rvHeight) {
69 return getResolutionVariantObserver(image, observer,
70 imgWidth, imgHeight, rvWidth, rvHeight, false);
71 }
72
73 public static ImageObserver getResolutionVariantObserver(
74 final Image image, final ImageObserver observer,
75 final int imgWidth, final int imgHeight,
76 final int rvWidth, final int rvHeight, boolean concatenateInfo) {
77
78 if (observer == null) {
79 return null;
80 }
81
82 synchronized (ObserverCache.INSTANCE) {
83 ImageObserver o = (ImageObserver) ObserverCache.INSTANCE.get(observer);
84
85 if (o == null) {
86
87 o = (Image resolutionVariant, int flags,
88 int x, int y, int width, int height) -> {
89
90 if ((flags & (ImageObserver.WIDTH | BITS_INFO)) != 0) {
91 width = (width + 1) / 2;
92 }
93
94 if ((flags & (ImageObserver.HEIGHT | BITS_INFO)) != 0) {
95 height = (height + 1) / 2;
96 }
97
98 if ((flags & BITS_INFO) != 0) {
99 x /= 2;
100 y /= 2;
101 }
102
103 if(concatenateInfo){
104 flags &= ((ToolkitImage) image).
105 getImageRep().check(null);
106 }
107
108 return observer.imageUpdate(
109 image, flags, x, y, width, height);
110 };
111
112 ObserverCache.INSTANCE.put(observer, o);
113 }
114 return o;
115 }
116 }
117 }
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