Examples of java.awt.image.VolatileImage.contentsLost()

java.awt.image.VolatileImage.contentsLost()
Returns true if rendering data was lost since last validate call. This method should be called by the application at the end of any series of rendering operations to or from the image to see whether the image needs to be validated and the rendering redone. @return true if the drawing surface needs to be restored;false otherwise.

                            bufferComponent,w, h);
                        vImage = (java.awt.image.VolatileImage)offscreen;
                    }
                    paintDoubleBuffered(paintingComponent, vImage, g, x, y,
                                        w, h);
                    paintCompleted = !vImage.contentsLost();
                }
            }
            // VolatileImage painting loop failed, fallback to regular
            // offscreen buffer
            if (!paintCompleted && (offscreen = getValidImage(

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                paintDirectly(bg, c, w, h, extendedCacheKeys);


                // close buffer graphics
                bg.dispose();
            }
        } while (buffer.contentsLost() && renderCounter++ < 3);


        // check if we failed
        if (renderCounter == 3)
            return null;

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                            bufferComponent,w, h);
                        vImage = (java.awt.image.VolatileImage)offscreen;
                    }
                    paintDoubleBuffered(paintingComponent, vImage, g, x, y,
                                        w, h);
                    paintCompleted = !vImage.contentsLost();
                }
            }
            // VolatileImage painting loop failed, fallback to regular
            // offscreen buffer
            if (!paintCompleted && (offscreen = getValidImage(

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        do {
            vi.validate(gc);
            Graphics2D g = vi.createGraphics();
            render(g, vi.getWidth(), vi.getHeight());
            bi = vi.getSnapshot();
        } while (vi.contentsLost());


        checkBI(bi);
        System.out.println("Test PASSED.");
    }

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                    dstRect.x + bltWidth, dstRect.y + bltHeight,
                    srcRect.x, srcRect.y,
                    srcRect.x + bltWidth, srcRect.y + bltHeight,
                    Color.red,
                    null);
        } while (vi != null && vi.contentsLost());
    }




    public void test(Rectangle srcRect, Rectangle dstRect) {
        int w = getWidth();

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                color = testImage(vi, true, false);
                testResult("vi_clip_notx", vi.getSnapshot(), color);


                color = testImage(vi, false, true);
                testResult("vi_noclip_tx", vi.getSnapshot(), color);
            } while (vi.contentsLost());
        }


        BufferedImage bi = new BufferedImage(64, 64, BufferedImage.TYPE_INT_RGB);
        int color = testImage(bi, false, false);
        testResult("bi_noclip_notx", bi, color);

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            g2d.fillRect(0, 0, vi.getWidth(), vi.getHeight());


            render(g2d);


            res = vi.getSnapshot();
        } while (vi.contentsLost());


        for (int y = 0; y < bi.getHeight(); y++) {
            for (int x = 0; x < bi.getWidth(); x++) {
                if (res.getRGB(x, y) == Color.black.getRGB()) {
                    System.err.printf("Test FAILED: found black at %d,%d\n",

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                            bufferComponent,w, h);
                        vImage = (java.awt.image.VolatileImage)offscreen;
                    }
                    paintDoubleBuffered(paintingComponent, vImage, g, x, y,
                                        w, h);
                    paintCompleted = !vImage.contentsLost();
                }
            }
            // VolatileImage painting loop failed, fallback to regular
            // offscreen buffer
            if (!paintCompleted && (offscreen = getValidImage(

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        repaintManager.resetVolatileDoubleBuffer(gc);
        offscreen = repaintManager.getVolatileOffscreenBuffer(bufferComponent,clipW, clipH);
        vImage = (java.awt.image.VolatileImage)offscreen;
    }
          paintWithOffscreenBuffer(paintingComponent, g, clipX, clipY, clipW, clipH, offscreen);
          paintCompleted = !vImage.contentsLost();
      } 
  }
  if (!paintCompleted) {
      // VolatileImage painting loop failed, fallback to regular offscreen buffer
      if ((offscreen =

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