24 */
25
26 package java.awt;
27
28 import java.awt.image.Raster;
29 import sun.awt.image.IntegerComponentRaster;
30 import java.awt.image.ColorModel;
31 import java.awt.image.DirectColorModel;
32 import java.awt.geom.Point2D;
33 import java.awt.geom.AffineTransform;
34 import java.awt.geom.NoninvertibleTransformException;
35 import java.lang.ref.WeakReference;
36
37 class GradientPaintContext implements PaintContext {
38 static ColorModel xrgbmodel =
39 new DirectColorModel(24, 0x00ff0000, 0x0000ff00, 0x000000ff);
40 static ColorModel xbgrmodel =
41 new DirectColorModel(24, 0x000000ff, 0x0000ff00, 0x00ff0000);
42
43 static ColorModel cachedModel;
44 static WeakReference cached;
45
46 static synchronized Raster getCachedRaster(ColorModel cm, int w, int h) {
47 if (cm == cachedModel) {
48 if (cached != null) {
49 Raster ras = (Raster) cached.get();
50 if (ras != null &&
51 ras.getWidth() >= w &&
52 ras.getHeight() >= h)
53 {
54 cached = null;
55 return ras;
56 }
57 }
58 }
59 return cm.createCompatibleWritableRaster(w, h);
60 }
61
62 static synchronized void putCachedRaster(ColorModel cm, Raster ras) {
63 if (cached != null) {
64 Raster cras = (Raster) cached.get();
65 if (cras != null) {
66 int cw = cras.getWidth();
67 int ch = cras.getHeight();
68 int iw = ras.getWidth();
69 int ih = ras.getHeight();
70 if (cw >= iw && ch >= ih) {
71 return;
72 }
73 if (cw * ch >= iw * ih) {
74 return;
75 }
76 }
77 }
78 cachedModel = cm;
79 cached = new WeakReference(ras);
80 }
81
82 double x1;
83 double y1;
84 double dx;
85 double dy;
86 boolean cyclic;
87 int interp[];
88 Raster saved;
89 ColorModel model;
90
91 public GradientPaintContext(ColorModel cm,
92 Point2D p1, Point2D p2, AffineTransform xform,
93 Color c1, Color c2, boolean cyclic) {
94 // First calculate the distance moved in user space when
95 // we move a single unit along the X & Y axes in device space.
96 Point2D xvec = new Point2D.Double(1, 0);
97 Point2D yvec = new Point2D.Double(0, 1);
98 try {
99 AffineTransform inverse = xform.createInverse();
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24 */
25
26 package java.awt;
27
28 import java.awt.image.Raster;
29 import sun.awt.image.IntegerComponentRaster;
30 import java.awt.image.ColorModel;
31 import java.awt.image.DirectColorModel;
32 import java.awt.geom.Point2D;
33 import java.awt.geom.AffineTransform;
34 import java.awt.geom.NoninvertibleTransformException;
35 import java.lang.ref.WeakReference;
36
37 class GradientPaintContext implements PaintContext {
38 static ColorModel xrgbmodel =
39 new DirectColorModel(24, 0x00ff0000, 0x0000ff00, 0x000000ff);
40 static ColorModel xbgrmodel =
41 new DirectColorModel(24, 0x000000ff, 0x0000ff00, 0x00ff0000);
42
43 static ColorModel cachedModel;
44 static WeakReference<Raster> cached;
45
46 static synchronized Raster getCachedRaster(ColorModel cm, int w, int h) {
47 if (cm == cachedModel) {
48 if (cached != null) {
49 Raster ras = (Raster) cached.get();
50 if (ras != null &&
51 ras.getWidth() >= w &&
52 ras.getHeight() >= h)
53 {
54 cached = null;
55 return ras;
56 }
57 }
58 }
59 return cm.createCompatibleWritableRaster(w, h);
60 }
61
62 static synchronized void putCachedRaster(ColorModel cm, Raster ras) {
63 if (cached != null) {
64 Raster cras = (Raster) cached.get();
65 if (cras != null) {
66 int cw = cras.getWidth();
67 int ch = cras.getHeight();
68 int iw = ras.getWidth();
69 int ih = ras.getHeight();
70 if (cw >= iw && ch >= ih) {
71 return;
72 }
73 if (cw * ch >= iw * ih) {
74 return;
75 }
76 }
77 }
78 cachedModel = cm;
79 cached = new WeakReference<>(ras);
80 }
81
82 double x1;
83 double y1;
84 double dx;
85 double dy;
86 boolean cyclic;
87 int interp[];
88 Raster saved;
89 ColorModel model;
90
91 public GradientPaintContext(ColorModel cm,
92 Point2D p1, Point2D p2, AffineTransform xform,
93 Color c1, Color c2, boolean cyclic) {
94 // First calculate the distance moved in user space when
95 // we move a single unit along the X & Y axes in device space.
96 Point2D xvec = new Point2D.Double(1, 0);
97 Point2D yvec = new Point2D.Double(0, 1);
98 try {
99 AffineTransform inverse = xform.createInverse();
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