757 }
758 }
759 } catch (IIOException iioe) {
760 throw iioe;
761 } catch (IOException ioe) {
762 throw new IIOException("I/O error reading image metadata!", ioe);
763 }
764 }
765
766 private int copyData(byte[] src, int offset, byte[] dst) {
767 int len = dst.length;
768 int rest = src.length - offset;
769 if (len > rest) {
770 len = rest;
771 }
772 System.arraycopy(src, offset, dst, 0, len);
773 return offset + len;
774 }
775
776 private void startPass(int pass) {
777 if (updateListeners == null) {
778 return;
779 }
780
781 int y = 0;
782 int yStep = 1;
783 if (imageMetadata.interlaceFlag) {
784 y = interlaceOffset[interlacePass];
785 yStep = interlaceIncrement[interlacePass];
786 }
787
788 int[] vals = ReaderUtil.
789 computeUpdatedPixels(sourceRegion,
790 destinationOffset,
791 destinationRegion.x,
792 destinationRegion.y,
793 destinationRegion.x +
794 destinationRegion.width - 1,
795 destinationRegion.y +
796 destinationRegion.height - 1,
797 sourceXSubsampling,
798 sourceYSubsampling,
799 0,
800 y,
801 destinationRegion.width,
802 (destinationRegion.height + yStep - 1)/yStep,
803 1,
804 yStep);
805
806 // Initialized updateMinY and updateYStep
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757 }
758 }
759 } catch (IIOException iioe) {
760 throw iioe;
761 } catch (IOException ioe) {
762 throw new IIOException("I/O error reading image metadata!", ioe);
763 }
764 }
765
766 private int copyData(byte[] src, int offset, byte[] dst) {
767 int len = dst.length;
768 int rest = src.length - offset;
769 if (len > rest) {
770 len = rest;
771 }
772 System.arraycopy(src, offset, dst, 0, len);
773 return offset + len;
774 }
775
776 private void startPass(int pass) {
777 if (updateListeners == null || !imageMetadata.interlaceFlag) {
778 return;
779 }
780
781 int y = interlaceOffset[interlacePass];
782 int yStep = interlaceIncrement[interlacePass];
783
784 int[] vals = ReaderUtil.
785 computeUpdatedPixels(sourceRegion,
786 destinationOffset,
787 destinationRegion.x,
788 destinationRegion.y,
789 destinationRegion.x +
790 destinationRegion.width - 1,
791 destinationRegion.y +
792 destinationRegion.height - 1,
793 sourceXSubsampling,
794 sourceYSubsampling,
795 0,
796 y,
797 destinationRegion.width,
798 (destinationRegion.height + yStep - 1)/yStep,
799 1,
800 yStep);
801
802 // Initialized updateMinY and updateYStep
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