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This is a backport of OpenJFX 8 to run on Java 7.
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/*
 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package com.sun.javafx.tk;

import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.nio.IntBuffer;
import javafx.scene.image.PixelFormat;
import javafx.scene.image.PixelReader;
import javafx.scene.image.WritablePixelFormat;

/**
 * Common interface to all toolkit-specific objects used to store image
 * data for a javafx.image.Image object.
 */
public interface PlatformImage {
    /**
     * Gets the scale representing how large an area a 72DPI virtual
     * pixel covers in terms of the pixels of this image.
     * A 72DPI platform image would return 1.0f.
     * A 144DPI platform image would return 2.0f.
     * 
     * @return the number of actual image pixels per 72DPI virtual pixel
     */
    public float getPixelScale();

    /**
     * @param x X coordinate of pixel
     * @param y Y coordinate of pixel
     * @return the non-premultiplied pixel in integer ARGB component ordering.
     */
    public int getArgb(int x, int y);

    /**
     * @param x X coordinate of pixel
     * @param y Y coordinate of pixel
     * @param argbpre non-premultiplied pixel data to store in integer ARGB
     *  component ordering
     */
    public void setArgb(int x, int y, int argb);

    /**
     * @return the PixelFormat to use for the pixel data transfer methods
     * getPixels() and setPixels().
     */
    public PixelFormat getPlatformPixelFormat();

    public boolean isWritable();
    public PlatformImage promoteToWritableImage();

    public  void getPixels(int x, int y, int w, int h,
                                             WritablePixelFormat pixelformat,
                                             T pixels, int scanlineElems);

    public void getPixels(int x, int y, int w, int h,
                          WritablePixelFormat pixelformat,
                          byte pixels[], int offset, int scanlineBytes);

    public void getPixels(int x, int y, int w, int h,
                          WritablePixelFormat pixelformat,
                          int pixels[], int offset, int scanlineInts);

    public  void setPixels(int x, int y, int w, int h,
                                             PixelFormat pixelformat,
                                             T pixels, int scanlineBytes);

    public void setPixels(int x, int y, int w, int h,
                          PixelFormat pixelformat,
                          byte pixels[], int offset, int scanlineBytes);

    public void setPixels(int x, int y, int w, int h,
                          PixelFormat pixelformat,
                          int pixels[], int offset, int scanlineInts);

    public void setPixels(int dstx, int dsty, int w, int h,
                          PixelReader reader, int srcx, int srcy);
}