How to Add a Watermark Above the Text or Image into a PowerPoint Presentation?

Aspose.Slides Product Family
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22

got it,Thank you!

23

@good_luck,
Thank you for using Aspose.Slides.

24

HELP!!!
I use Slides.IAutoShape to add the watermark of PPT. How to set the watermark transparency, The following code is my relevant code.
image.png (30.9 KB)

25

@good_luck,
To set transparency for a shape, you can use the IFillFormat interface like this:

shape.getFillFormat().setFillType(FillType.Solid);
// 128 is the transparency value here
shape.getFillFormat().getSolidFillColor().setColor(new Color(150, 200, 0, 128));
26

Thanks for you answer. But transparency is a 0-1 floating point number, so how do you convert it?

27

@good_luck,
If your transparency values are strictly in [0; 1] range and 0 means fully opaque and 1 means fully transparent, you should convert the floating transparency value like this:

int alfa = (int)((1 - transparency) * 255);

If your transparency values change the other way around, you should convert them like this:

int alfa = (int)(transparency * 255);