fop-core/src/main/java/org/apache/fop/render/AbstractGraphics2DAdapter.java [117:137]:
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    private static BufferedImage createGrayBufferedImageWithAlpha(int width, int height) {
        BufferedImage bi;
        boolean alphaPremultiplied = true;
        int bands = 2;
        int[] bits = new int[bands];
        for (int i = 0; i < bands; i++) {
            bits[i] = 8;
        }
        ColorModel cm = new ComponentColorModel(
                ColorSpace.getInstance(ColorSpace.CS_GRAY),
                bits,
                true, alphaPremultiplied,
                Transparency.TRANSLUCENT,
                DataBuffer.TYPE_BYTE);
        WritableRaster wr = Raster.createInterleavedRaster(
                DataBuffer.TYPE_BYTE,
                width, height, bands,
                new Point(0, 0));
        bi = new BufferedImage(cm, wr, alphaPremultiplied, null);
        return bi;
    }
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fop-core/src/main/java/org/apache/fop/render/AbstractImageHandlerGraphics2D.java [106:126]:
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    private static BufferedImage createGrayBufferedImageWithAlpha(int width, int height) {
        BufferedImage bi;
        boolean alphaPremultiplied = true;
        int bands = 2;
        int[] bits = new int[bands];
        for (int i = 0; i < bands; i++) {
            bits[i] = 8;
        }
        ColorModel cm = new ComponentColorModel(
                ColorSpace.getInstance(ColorSpace.CS_GRAY),
                bits,
                true, alphaPremultiplied,
                Transparency.TRANSLUCENT,
                DataBuffer.TYPE_BYTE);
        WritableRaster wr = Raster.createInterleavedRaster(
                DataBuffer.TYPE_BYTE,
                width, height, bands,
                new Point(0, 0));
        bi = new BufferedImage(cm, wr, alphaPremultiplied, null);
        return bi;
    }
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