如何应用 Gradient 或 Pattern Fill 到 PSD 层使用 Aspose.PSD 为 .NET

using Aspose.PSD;
using Aspose.PSD.FileFormats.Psd;
using Aspose.PSD.FileFormats.Psd.Layers;
using Aspose.PSD.FileFormats.Psd.Layers.FillLayers;

string inputFile = "./input/sample_with_filllayer.psd";
string outputFile = "./output/sample_gradient_fill.psd";

var loadOptions = new PsdLoadOptions() { LoadEffectsResource = true };
PsdImage psdImage = (PsdImage)Image.Load(inputFile, loadOptions);

FillLayer fillLayer = null;
foreach (var layer in psdImage.Layers)
{
    if (layer is FillLayer f)
    {
        fillLayer = f;
        break;
    }
}
if (fillLayer == null)
{
    throw new InvalidOperationException("No fill layer found in PSD.");
}

var gradientSettings = new GradientFillSettings();
gradientSettings.ColorPoints = new IGradientColorPoint[] {
    new GradientColorPoint() { Color = Color.Red },
    new GradientColorPoint() { Color = Color.Blue }
};
fillLayer.FillSettings = gradientSettings;

// Pattern fill is also supported if needed
// var patternSettings = new PatternFillSettings();
// ... configure patternSettings as needed
// fillLayer.FillSettings = patternSettings;

psdImage.Save(outputFile);
psdImage.Dispose();