PDFBOX：渐变不填充特定形状

Question

我正在尝试使用渐变色填充绘制的形状，但渐变色填充了整个区域，附上我的代码：

创建渐变颜色的代码：

public static PDColor createSpotColorFromRGB(String spotColorName, int r, int g, int b) throws IOException {
        PDSeparation seperation = new PDSeparation();
        COSDictionary dictionary = new COSDictionary();
        COSArray C0 = new COSArray();
        COSArray C1 = new COSArray();
        COSArray range = new COSArray();
        COSArray domain = new COSArray();
        float[] components = null;

        seperation.setColorantName(spotColorName);

        components = new float[] { r / 255f, g / 255f, b / 255f };

        seperation.setAlternateColorSpace(PDDeviceRGB.INSTANCE);

        C0.add(COSInteger.ZERO);
        C0.add(COSInteger.ZERO);
        C0.add(COSInteger.ZERO);

        range.add(COSInteger.ZERO);
        range.add(COSInteger.ONE);
        range.add(COSInteger.ZERO);
        range.add(COSInteger.ONE);
        range.add(COSInteger.ZERO);
        range.add(COSInteger.ONE);

        for (int i = 0; i < components.length; i++) {
            C1.add(new COSFloat(components[i]));
        }

        domain.add(COSInteger.ZERO);
        domain.add(COSInteger.ONE);

        dictionary.setItem(COSName.C1, C1);
        dictionary.setItem(COSName.C0, C0);
        dictionary.setItem(COSName.DOMAIN, domain);
        dictionary.setItem(COSName.FUNCTION_TYPE, COSInteger.TWO);
        dictionary.setItem(COSName.N, COSInteger.ONE);
        dictionary.setItem(COSName.RANGE, range);

        PDFunction functionTyp2 = new PDFunctionType2(dictionary);

        seperation.setTintTransform(functionTyp2);

        return new PDColor(new float[] { 1f }, seperation);
    }

绘制矩形的代码：

contentStream.saveGraphicsState();

extendedGraphicsStateForDrawing = new PDExtendedGraphicsState();
extendedGraphicsStateForDrawing.setAlphaSourceFlag(true);
extendedGraphicsStateForDrawing.setStrokingAlphaConstant(alphaStroke);
extendedGraphicsStateForDrawing.setNonStrokingAlphaConstant(alphaFill);

contentStream.setGraphicsStateParameters(extendedGraphicsStateForDrawing);

contentStream.moveTo(5, 5);
contentStream.lineTo(10,5);
contentStream.lineTo(10,10);
contentStream.lineTo(10,5);
contentStream.closePath();

contentStream.shadingFill(PdfUtils.createGradientColor(gradiantFactors));

contentStream.restoreGraphicsState();

为什么所有页面都用渐变填充，而不仅仅是矩形：

谢谢。

Answer 1

通话

contentStream.clip();

在做阴影之前。阴影填充不像正常填充那样工作。

PDFBOX：渐变不填充特定形状

PDFBOX: Gradient not fill only the specific shape

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