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package javafx.scene.image;

import javafx.scene.paint.Color;

import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.nio.IntBuffer;


This interface defines methods for writing the pixel data of a WritableImage or other surface containing writable pixels. 
Since:JavaFX 2.2
/**
 * This interface defines methods for writing the pixel data of a
 * {@link WritableImage} or other surface containing writable pixels.
 * @since JavaFX 2.2
 */
public interface PixelWriter {
    
This method returns the PixelFormat in which the surface stores its pixels, or a roughly equivalent pixel format from which it can easily convert pixels for purposes of writing them. 
Returns:the PixelFormat that best describes the underlying pixels
/**
     * This method returns the {@code PixelFormat} in which the surface
     * stores its pixels, or a roughly equivalent pixel format from which
     * it can easily convert pixels for purposes of writing them.
     *
     * @return the {@code PixelFormat} that best describes the underlying
     *         pixels
     */
    public PixelFormat getPixelFormat();

    
Stores pixel data for a color into the specified coordinates of the surface. The 32-bit integer argb parameter should contain the 4 color components in separate 8-bit fields in ARGB order from the most significant byte to the least significant byte. 
Params:
  • x – the X coordinate of the pixel color to write
  • y – the Y coordinate of the pixel color to write
  • argb – the color information to write, specified in the format described by the INT_ARGB PixelFormat type.
/**
     * Stores pixel data for a color into the specified coordinates of the
     * surface.
     * The 32-bit integer {@code argb} parameter should contain the 4 color
     * components in separate 8-bit fields in ARGB order from the most
     * significant byte to the least significant byte.
     *
     * @param x the X coordinate of the pixel color to write
     * @param y the Y coordinate of the pixel color to write
     * @param argb the color information to write, specified in the format
     *         described by the {@link PixelFormat.Type#INT_ARGB INT_ARGB}
     *         PixelFormat type.
     */
    public void setArgb(int x, int y, int argb);

    
Stores pixel data for a Color into the specified coordinates of the surface. 
Params:
  • x – the X coordinate of the pixel color to write
  • y – the Y coordinate of the pixel color to write
  • c – the Color to write or null
Throws:
/**
     * Stores pixel data for a {@link Color} into the specified coordinates
     * of the surface.
     *
     * @param x the X coordinate of the pixel color to write
     * @param y the Y coordinate of the pixel color to write
     * @param c the Color to write or null
     *
     * @throws java.lang.NullPointerException if {@code color} is {@code null}
     */
    public void setColor(int x, int y, Color c);

    
Stores pixel data from a buffer into a rectangular region of the surface. The format of the pixels in the buffer is defined by the PixelFormat object and pixel format conversions will be performed as needed to store the data into the surface. The buffer is assumed to be positioned to the location where the first pixel data to be stored in the surface pixel at location (x, y) is located. Pixel data for a row will be read from adjacent locations within the buffer packed as tightly as possible for increasing X coordinates. Pixel data for adjacent rows will be read offset from each other by the number of buffer data elements defined by scanlineStride. 
Params:
  • x – the X coordinate of the rectangular region to write
  • y – the Y coordinate of the rectangular region to write
  • w – the width of the rectangular region to write
  • h – the height of the rectangular region to write
  • pixelformat – the PixelFormat object defining the format to read the pixels from the buffer
  • buffer – a buffer of a type appropriate for the indicated PixelFormat object
  • scanlineStride – the distance between the pixel data for the
       start of one row of data in the buffer to the start of the
       next row of data.
Type parameters:
  • <T> – the type of the buffer
Throws:
/**
     * Stores pixel data from a buffer into a rectangular region of the
     * surface.
     * The format of the pixels in the buffer is defined by the
     * {@link PixelFormat} object and pixel format conversions will be
     * performed as needed to store the data into the surface.
     * The buffer is assumed to be positioned to the location where the
     * first pixel data to be stored in the surface pixel at location
     * {@code (x, y)} is located.
     * Pixel data for a row will be read from adjacent locations within
     * the buffer packed as tightly as possible for increasing X
     * coordinates.
     * Pixel data for adjacent rows will be read offset from each other
     * by the number of buffer data elements defined by
     * {@code scanlineStride}.
     *
     * @param <T> the type of the buffer
     * @param x the X coordinate of the rectangular region to write
     * @param y the Y coordinate of the rectangular region to write
     * @param w the width of the rectangular region to write
     * @param h the height of the rectangular region to write
     * @param pixelformat the {@code PixelFormat} object defining the format
     *        to read the pixels from the buffer
     * @param buffer a buffer of a type appropriate for the indicated
     *        {@code PixelFormat} object
     * @param scanlineStride the distance between the pixel data for the
     *        start of one row of data in the buffer to the start of the
     *        next row of data.
     *
     * @throws java.lang.NullPointerException if {@code pixelformat} or {@code buffer} is {@code null}
     */
    public <T extends Buffer>
        void setPixels(int x, int y, int w, int h,
                       PixelFormat<T> pixelformat,
                       T buffer, int scanlineStride);

    
Stores pixel data from a byte array into a rectangular region of the surface. The format of the pixels in the buffer is defined by the PixelFormat object and pixel format conversions will be performed as needed to store the data into the surface. The pixelformat must be a compatible PixelFormat<ByteBuffer> type. The data for the first pixel at location (x, y) will be read from the array index specified by the offset parameter. Pixel data for a row will be read from adjacent locations within the array packed as tightly as possible for increasing X coordinates. Pixel data for adjacent rows will be read offset from each other by the number of byte array elements defined by scanlineStride. 
Params:
  • x – the X coordinate of the rectangular region to write
  • y – the Y coordinate of the rectangular region to write
  • w – the width of the rectangular region to write
  • h – the height of the rectangular region to write
  • pixelformat – the PixelFormat<ByteBuffer> object defining the byte format to read the pixels from buffer
  • buffer – a byte array containing the pixel data to store
  • offset – the offset into buffer to read the first pixel data
  • scanlineStride – the distance between the pixel data for the
       start of one row of data in the buffer to the start of the
       next row of data
Throws:
/**
     * Stores pixel data from a byte array into a rectangular region of the
     * surface.
     * The format of the pixels in the buffer is defined by the
     * {@link PixelFormat} object and pixel format conversions will be
     * performed as needed to store the data into the surface.
     * The {@code pixelformat} must be a compatible
     * {@code PixelFormat<ByteBuffer>} type.
     * The data for the first pixel at location {@code (x, y)} will be
     * read from the array index specified by the {@code offset} parameter.
     * Pixel data for a row will be read from adjacent locations within
     * the array packed as tightly as possible for increasing X
     * coordinates.
     * Pixel data for adjacent rows will be read offset from each other
     * by the number of byte array elements defined by
     * {@code scanlineStride}.
     *
     * @param x the X coordinate of the rectangular region to write
     * @param y the Y coordinate of the rectangular region to write
     * @param w the width of the rectangular region to write
     * @param h the height of the rectangular region to write
     * @param pixelformat the {@code PixelFormat<ByteBuffer>} object
     *        defining the byte format to read the pixels from buffer
     * @param buffer a byte array containing the pixel data to store
     * @param offset the offset into {@code buffer} to read the first
     *        pixel data
     * @param scanlineStride the distance between the pixel data for the
     *        start of one row of data in the buffer to the start of the
     *        next row of data
     *
     * @throws java.lang.NullPointerException if {@code pixelformat} or {@code buffer} is {@code null}
     */
    public void setPixels(int x, int y, int w, int h,
                          PixelFormat<ByteBuffer> pixelformat,
                          byte buffer[], int offset, int scanlineStride);

    
Stores pixel data from an int array into a rectangular region of the surface. The format of the pixels in the buffer is defined by the PixelFormat object and pixel format conversions will be performed as needed to store the data into the surface. The pixelformat must be a compatible PixelFormat<IntBuffer> type. The data for the first pixel at location (x, y) will be read from the array index specified by the offset parameter. Pixel data for a row will be read from adjacent locations within the array packed as tightly as possible for increasing X coordinates. Pixel data for adjacent rows will be read offset from each other by the number of int array elements defined by scanlineStride. 
Params:
  • x – the X coordinate of the rectangular region to write
  • y – the Y coordinate of the rectangular region to write
  • w – the width of the rectangular region to write
  • h – the height of the rectangular region to write
  • pixelformat – the PixelFormat<IntBuffer> object defining the int format to read the pixels from buffer
  • buffer – an int array to containing the pixel data to store
  • offset – the offset into buffer to read the first pixel data
  • scanlineStride – the distance between the pixel data for the
       start of one row of data in the buffer to the start of the
       next row of data
Throws:
/**
     * Stores pixel data from an int array into a rectangular region of the
     * surface.
     * The format of the pixels in the buffer is defined by the
     * {@link PixelFormat} object and pixel format conversions will be
     * performed as needed to store the data into the surface.
     * The {@code pixelformat} must be a compatible
     * {@code PixelFormat<IntBuffer>} type.
     * The data for the first pixel at location {@code (x, y)} will be
     * read from the array index specified by the {@code offset} parameter.
     * Pixel data for a row will be read from adjacent locations within
     * the array packed as tightly as possible for increasing X
     * coordinates.
     * Pixel data for adjacent rows will be read offset from each other
     * by the number of int array elements defined by
     * {@code scanlineStride}.
     *
     * @param x the X coordinate of the rectangular region to write
     * @param y the Y coordinate of the rectangular region to write
     * @param w the width of the rectangular region to write
     * @param h the height of the rectangular region to write
     * @param pixelformat the {@code PixelFormat<IntBuffer>} object
     *        defining the int format to read the pixels from buffer
     * @param buffer an int array to containing the pixel data to store
     * @param offset the offset into {@code buffer} to read the first
     *        pixel data
     * @param scanlineStride the distance between the pixel data for the
     *        start of one row of data in the buffer to the start of the
     *        next row of data
     *
     * @throws java.lang.NullPointerException if {@code pixelformat} or {@code buffer} is {@code null}
     */
    public void setPixels(int x, int y, int w, int h,
                          PixelFormat<IntBuffer> pixelformat,
                          int buffer[], int offset, int scanlineStride);

    
Stores pixel data retrieved from a PixelReader instance into a rectangular region of the surface. The data for the pixel on the surface at (dstx, dsty) will be retrieved from the reader from its location (srcx, srcy). This method performs an operation which is semantically equivalent to (though likely much faster than) this pseudo-code: 
    for (int y = 0; y < h, y++) {
        for (int x = 0; x < w; x++) {
            setArgb(dstx + x, dsty + y,
                    reader.getArgb(srcx + x, srcy + y));
        }
    }



Params:
  • dstx – the X coordinate of the rectangular region to write
  • dsty – the Y coordinate of the rectangular region to write
  • w – the width of the rectangular region to write
  • h – the height of the rectangular region to write
  • reader – the PixelReader used to get the pixel data to write
  • srcx – the X coordinate of the data to read from reader
  • srcy – the Y coordinate of the data to read from reader
Throws:
/**
     * Stores pixel data retrieved from a {@code PixelReader} instance
     * into a rectangular region of the surface.
     * The data for the pixel on the surface at {@code (dstx, dsty)}
     * will be retrieved from the {@code reader} from its location
     * {@code (srcx, srcy)}.
     * This method performs an operation which is semantically equivalent to
     * (though likely much faster than) this pseudo-code:
     * <pre>
     *     for (int y = 0; y &lt; h, y++) {
     *         for (int x = 0; x &lt; w; x++) {
     *             setArgb(dstx + x, dsty + y,
     *                     reader.getArgb(srcx + x, srcy + y));
     *         }
     *     }
     * </pre>
     *
     *
     * @param dstx the X coordinate of the rectangular region to write
     * @param dsty the Y coordinate of the rectangular region to write
     * @param w the width of the rectangular region to write
     * @param h the height of the rectangular region to write
     * @param reader the {@link PixelReader} used to get the pixel data
     *        to write
     * @param srcx the X coordinate of the data to read from {@code reader}
     * @param srcy the Y coordinate of the data to read from {@code reader}
     *
     * @throws java.lang.NullPointerException if {@code reader} is {@code null}
     */
    public void setPixels(int dstx, int dsty, int w, int h,
                          PixelReader reader, int srcx, int srcy);
}