Java 从BuffereImage到SWT Image的转换

在仔细查看之后，我发现了一段代码，可以将

buffereImage

转换为SWT图像（现在还不用阅读）：

公共静态图像数据转换到WT（BuffereImage BuffereImage）{
if（BuffereImage.getColorModel（）DirectColorModel的实例）{
DirectColorModel colorModel=（DirectColorModel）BuffereImage.getColorModel（）；
PaletteData调色板=新PaletteData(
colorModel.getRedMask（），
colorModel.getGreenMask（），
colorModel.getBlueMask（）
);
ImageData数据=新的ImageData(
BuffereImage.getWidth（），
BuffereImage.getHeight（），colorModel.getPixelSize（），
调色板
);
WritableRaster raster=BuffereImage.getRaster（）；
int[]像素数组=新int[3]；
对于（int y=0；y

（可在此处找到：）

我已经测试过了，效果很好。问题是我不理解它（我最好的猜测是它使用两者的原始数据接口进行传输）。我想到一个更简单的解决方案是将

BufferedImage

写入

ByteArrayOutputStream

，然后用

ByteArrayInputStream

将其读回SWT图像。这个解决方案有什么问题吗？速度呢

这种转换是必要的，因为所有的图像大小调整库都是用于AWT的，但我用SWT显示图像

---

谢谢

代码的复杂性主要是由于

buffereImage

的两种可能的颜色模型。我认为你在这方面没有多大改进。首先，使用中间的

流

需要两个图像系统有一个共同的格式，与

流

的转换肯定要比当前代码慢得多。

这是一个更完整的版本。。。问题中的那个帖子对我不起作用

/**
 * snippet 156: convert between SWT Image and AWT BufferedImage.
 * <p>
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */
public static ImageData convertToSWT(BufferedImage bufferedImage) {
    if (bufferedImage.getColorModel() instanceof DirectColorModel) {
        /*
        DirectColorModel colorModel = (DirectColorModel)bufferedImage.getColorModel();
        PaletteData palette = new PaletteData(
                colorModel.getRedMask(),
                colorModel.getGreenMask(),
                colorModel.getBlueMask());
        ImageData data = new ImageData(bufferedImage.getWidth(), bufferedImage.getHeight(),
                colorModel.getPixelSize(), palette);
        WritableRaster raster = bufferedImage.getRaster();
        int[] pixelArray = new int[3];
        for (int y = 0; y < data.height; y++) {
            for (int x = 0; x < data.width; x++) {
                raster.getPixel(x, y, pixelArray);
                int pixel = palette.getPixel(new RGB(pixelArray[0], pixelArray[1], pixelArray[2]));
                data.setPixel(x, y, pixel);
            }
        }
        */
        DirectColorModel colorModel = (DirectColorModel)bufferedImage.getColorModel();
        PaletteData palette = new PaletteData(
                colorModel.getRedMask(),
                colorModel.getGreenMask(),
                colorModel.getBlueMask());
        ImageData data = new ImageData(bufferedImage.getWidth(), bufferedImage.getHeight(),
                colorModel.getPixelSize(), palette);
        for (int y = 0; y < data.height; y++) {
            for (int x = 0; x < data.width; x++) {
                int rgb = bufferedImage.getRGB(x, y);
                int pixel = palette.getPixel(new RGB((rgb >> 16) & 0xFF, (rgb >> 8) & 0xFF, rgb & 0xFF));
                data.setPixel(x, y, pixel);
                if (colorModel.hasAlpha()) {
                    data.setAlpha(x, y, (rgb >> 24) & 0xFF);
                }
            }
        }
        return data;
    }
    else if (bufferedImage.getColorModel() instanceof IndexColorModel) {
        IndexColorModel colorModel = (IndexColorModel)bufferedImage.getColorModel();
        int size = colorModel.getMapSize();
        byte[] reds = new byte[size];
        byte[] greens = new byte[size];
        byte[] blues = new byte[size];
        colorModel.getReds(reds);
        colorModel.getGreens(greens);
        colorModel.getBlues(blues);
        RGB[] rgbs = new RGB[size];
        for (int i = 0; i < rgbs.length; i++) {
            rgbs[i] = new RGB(reds[i] & 0xFF, greens[i] & 0xFF, blues[i] & 0xFF);
        }
        PaletteData palette = new PaletteData(rgbs);
        ImageData data = new ImageData(bufferedImage.getWidth(), bufferedImage.getHeight(),
                colorModel.getPixelSize(), palette);
        data.transparentPixel = colorModel.getTransparentPixel();
        WritableRaster raster = bufferedImage.getRaster();
        int[] pixelArray = new int[1];
        for (int y = 0; y < data.height; y++) {
            for (int x = 0; x < data.width; x++) {
                raster.getPixel(x, y, pixelArray);
                data.setPixel(x, y, pixelArray[0]);
            }
        }
        return data;
    }
    else if (bufferedImage.getColorModel() instanceof ComponentColorModel) {
        ComponentColorModel colorModel = (ComponentColorModel)bufferedImage.getColorModel();
        //ASSUMES: 3 BYTE BGR IMAGE TYPE
        PaletteData palette = new PaletteData(0x0000FF, 0x00FF00,0xFF0000);
        ImageData data = new ImageData(bufferedImage.getWidth(), bufferedImage.getHeight(),
                colorModel.getPixelSize(), palette);
        //This is valid because we are using a 3-byte Data model with no transparent pixels
        data.transparentPixel = -1;
        WritableRaster raster = bufferedImage.getRaster();
        int[] pixelArray = new int[3];
        for (int y = 0; y < data.height; y++) {
            for (int x = 0; x < data.width; x++) {
                raster.getPixel(x, y, pixelArray);
                int pixel = palette.getPixel(new RGB(pixelArray[0], pixelArray[1], pixelArray[2]));
                data.setPixel(x, y, pixel);
            }
        }
        return data;
    }
    return null;
}

/**
*代码片段156：在SWT映像和AWT BuffereImage之间转换。
*
*有关所有SWT示例代码段的列表，请参见
* http://www.eclipse.org/swt/snippets/
*/
公共静态图像数据转换器TOSWT（BuffereImage BuffereImage）{
if（BuffereImage.getColorModel（）DirectColorModel的实例）{
/*
DirectColorModel colorModel=（DirectColorModel）BuffereImage.getColorModel（）；
PaletteData调色板=新PaletteData(
colorModel.getRedMask（），
colorModel.getGreenMask（），
colorModel.getBlueMask（））；
ImageData data=新的ImageData（BuffereImage.getWidth（），BuffereImage.getHeight（），
colorModel.getPixelSize（），调色板）；
WritableRaster raster=BuffereImage.getRaster（）；
int[]像素数组=新int[3]；
对于（int y=0；y>16）和0xFF，（RGB>>8）和0xFF，RGB和0xFF））；
数据。设置像素（x，y，像素）；
if（colorModel.hasAlpha（））{
setAlpha（x，y，（rgb>>24）和0xFF）；
}
}
}
返回数据；
}
else if（buffereImage.getColorModel（）实例为IndexColorModel）{
IndexColorModel colorModel=（IndexColorModel）BuffereImage.getColorModel（）；
int size=colorModel.getMapSize（）；
字节[]红色=新字节[大小]；
字节[]绿色=新字节[大小]；
字节[]蓝色=新字节[大小]；
/**
 * snippet 156: convert between SWT Image and AWT BufferedImage.
 * <p>
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */
public static ImageData convertToSWT(BufferedImage bufferedImage) {
    if (bufferedImage.getColorModel() instanceof DirectColorModel) {
        /*
        DirectColorModel colorModel = (DirectColorModel)bufferedImage.getColorModel();
        PaletteData palette = new PaletteData(
                colorModel.getRedMask(),
                colorModel.getGreenMask(),
                colorModel.getBlueMask());
        ImageData data = new ImageData(bufferedImage.getWidth(), bufferedImage.getHeight(),
                colorModel.getPixelSize(), palette);
        WritableRaster raster = bufferedImage.getRaster();
        int[] pixelArray = new int[3];
        for (int y = 0; y < data.height; y++) {
            for (int x = 0; x < data.width; x++) {
                raster.getPixel(x, y, pixelArray);
                int pixel = palette.getPixel(new RGB(pixelArray[0], pixelArray[1], pixelArray[2]));
                data.setPixel(x, y, pixel);
            }
        }
        */
        DirectColorModel colorModel = (DirectColorModel)bufferedImage.getColorModel();
        PaletteData palette = new PaletteData(
                colorModel.getRedMask(),
                colorModel.getGreenMask(),
                colorModel.getBlueMask());
        ImageData data = new ImageData(bufferedImage.getWidth(), bufferedImage.getHeight(),
                colorModel.getPixelSize(), palette);
        for (int y = 0; y < data.height; y++) {
            for (int x = 0; x < data.width; x++) {
                int rgb = bufferedImage.getRGB(x, y);
                int pixel = palette.getPixel(new RGB((rgb >> 16) & 0xFF, (rgb >> 8) & 0xFF, rgb & 0xFF));
                data.setPixel(x, y, pixel);
                if (colorModel.hasAlpha()) {
                    data.setAlpha(x, y, (rgb >> 24) & 0xFF);
                }
            }
        }
        return data;
    }
    else if (bufferedImage.getColorModel() instanceof IndexColorModel) {
        IndexColorModel colorModel = (IndexColorModel)bufferedImage.getColorModel();
        int size = colorModel.getMapSize();
        byte[] reds = new byte[size];
        byte[] greens = new byte[size];
        byte[] blues = new byte[size];
        colorModel.getReds(reds);
        colorModel.getGreens(greens);
        colorModel.getBlues(blues);
        RGB[] rgbs = new RGB[size];
        for (int i = 0; i < rgbs.length; i++) {
            rgbs[i] = new RGB(reds[i] & 0xFF, greens[i] & 0xFF, blues[i] & 0xFF);
        }
        PaletteData palette = new PaletteData(rgbs);
        ImageData data = new ImageData(bufferedImage.getWidth(), bufferedImage.getHeight(),
                colorModel.getPixelSize(), palette);
        data.transparentPixel = colorModel.getTransparentPixel();
        WritableRaster raster = bufferedImage.getRaster();
        int[] pixelArray = new int[1];
        for (int y = 0; y < data.height; y++) {
            for (int x = 0; x < data.width; x++) {
                raster.getPixel(x, y, pixelArray);
                data.setPixel(x, y, pixelArray[0]);
            }
        }
        return data;
    }
    else if (bufferedImage.getColorModel() instanceof ComponentColorModel) {
        ComponentColorModel colorModel = (ComponentColorModel)bufferedImage.getColorModel();
        //ASSUMES: 3 BYTE BGR IMAGE TYPE
        PaletteData palette = new PaletteData(0x0000FF, 0x00FF00,0xFF0000);
        ImageData data = new ImageData(bufferedImage.getWidth(), bufferedImage.getHeight(),
                colorModel.getPixelSize(), palette);
        //This is valid because we are using a 3-byte Data model with no transparent pixels
        data.transparentPixel = -1;
        WritableRaster raster = bufferedImage.getRaster();
        int[] pixelArray = new int[3];
        for (int y = 0; y < data.height; y++) {
            for (int x = 0; x < data.width; x++) {
                raster.getPixel(x, y, pixelArray);
                int pixel = palette.getPixel(new RGB(pixelArray[0], pixelArray[1], pixelArray[2]));
                data.setPixel(x, y, pixel);
            }
        }
        return data;
    }
    return null;
}