Module javafx.graphics
Package javafx.scene.image

Interface PixelWriter

public interface PixelWriter
This interface defines methods for writing the pixel data of a WritableImage or other surface containing writable pixels.
Since:
JavaFX 2.2

  • Method Summary

    Modifier and Type Method Description
    PixelFormat getPixelFormat()
    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.
    void setArgb​(int x, int y, int argb)
    Stores pixel data for a color into the specified coordinates of the surface.
    void setColor​(int x, int y, Color c)
    Stores pixel data for a Color into the specified coordinates of the surface.
    void setPixels​(int x, int y, int w, int h, PixelFormat<ByteBuffer> pixelformat, byte[] buffer, int offset, int scanlineStride)
    Stores pixel data from a byte array into a rectangular region of the surface.
    void setPixels​(int x, int y, int w, int h, PixelFormat<IntBuffer> pixelformat, int[] buffer, int offset, int scanlineStride)
    Stores pixel data from an int array into a rectangular region of the surface.
    <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 buffer into a rectangular region of the surface.
    void setPixels​(int dstx, int dsty, int w, int h, PixelReader reader, int srcx, int srcy)
    Stores pixel data retrieved from a PixelReader instance into a rectangular region of the surface.

  • Method Details

    • getPixelFormat

      PixelFormat getPixelFormat()
      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

    • setArgb

      void setArgb​(int x, int y, int argb)
      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.
      Parameters:
      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.

    • setColor

      void setColor​(int x, int y, Color c)
      Stores pixel data for a Color into the specified coordinates of the surface.
      Parameters:
      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:
      NullPointerException - if color is null

    • setPixels

      <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 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.
      Type Parameters:
      T - the type of the buffer
      Parameters:
      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.
      Throws:
      NullPointerException - if pixelformat or buffer is null

    • setPixels

      void setPixels​(int x, int y, int w, int h, PixelFormat<ByteBuffer> pixelformat, byte[] buffer, int offset, 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.
      Parameters:
      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:
      NullPointerException - if pixelformat or buffer is null

    • setPixels

      void setPixels​(int x, int y, int w, int h, PixelFormat<IntBuffer> pixelformat, int[] 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.
      Parameters:
      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:
      NullPointerException - if pixelformat or buffer is null

    • setPixels

      void setPixels​(int dstx, int dsty, int w, int h, PixelReader reader, int srcx, int srcy)
      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));
         }
     }
      Parameters:
      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:
      NullPointerException - if reader is null