CODEWITHSUNDEEP
2dskiaskiasharp
Mohan Selvaraj
Mohan Selvaraj

Reputation: 276

How to make the SKBitmap bitmap color as Transparent in SkiaSharp

In System.Drawing we will make the bitmap image color as transparent by using maketransparent method Whether SKBITMAP has any other equivalent method for making the color to transparent.

Bitmap imgData = new Bitmap() imgData.MakeTransparent(Color.White);//in system.Drawing

Can any one please suggest a solution for making the color as transparent for SkiaSharp.SKBitmap

Upvotes: 4

Views: 2959

Answers (2)

Harlan
Harlan

Reputation: 148

Setting SKBitmap.Pixels does the trick. Here is an extension method:

public static void ClearToTransparent (this SKBitmap bitmap) {
    int pixelCount = bitmap.Width * bitmap.Height;
    SKColor[] colors = new SKColor[pixelCount];
    SKColor transparent = new SKColor(0, 0, 0, 0);

    for (int n = 0; n < pixelCount; n++) {
        colors[n] = transparent;
    }
    bitmap.Pixels = colors;
}

Upvotes: 1

Matthew
Matthew

Reputation: 5222

I would suggest asking on the official skia forums: https://groups.google.com/forum/#!forum/skia-discuss

I know a quite a bit about skia, but they know everything. SkiaSharp is just a thin wrapper around the native library, so whatever they do just do the same in C#.

Upvotes: 0

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