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