SKShader.CreateCompose Method
Definition
Important
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Overloads
| CreateCompose(SKShader, SKShader) |
Create a new compose shader, which combines two shaders by the SrcOver blend mode. |
| CreateCompose(SKShader, SKShader, SKBlendMode) |
Create a new compose shader, which combines two shaders by a blend mode. |
Examples
var info = new SKImageInfo(256, 256);
using (var surface = SKSurface.Create(info)) {
SKCanvas canvas = surface.Canvas;
canvas.Clear(SKColors.White);
// create the first shader
var colors = new SKColor[] {
new SKColor(0, 255, 255),
new SKColor(255, 0, 255),
new SKColor(255, 255, 0),
new SKColor(0, 255, 255)
};
var sweep = SKShader.CreateSweepGradient(new SKPoint(128, 128), colors, null);
// create the second shader
var turbulence = SKShader.CreatePerlinNoiseTurbulence(0.05f, 0.05f, 4, 0);
// create the compose shader
var shader = SKShader.CreateCompose(sweep, turbulence, SKBlendMode.SrcOver);
// use the compose shader
var paint = new SKPaint {
Shader = shader
};
canvas.DrawPaint(paint);
}
The example above produces the following:
Remarks
Create a new compose shader, which combines two shaders by a blend mode.
CreateCompose(SKShader, SKShader)
Create a new compose shader, which combines two shaders by the SrcOver blend mode.
public static SkiaSharp.SKShader CreateCompose (SkiaSharp.SKShader shaderA, SkiaSharp.SKShader shaderB);Parameters
- shaderA
- SKShader
The colors from this shader are seen as the destination by the blend mode.
- shaderB
- SKShader
The colors from this shader are seen as the source by the blend mode.
Returns
Returns a new SKShader, or an empty shader on error. This function never returns null.
Applies to
CreateCompose(SKShader, SKShader, SKBlendMode)
Create a new compose shader, which combines two shaders by a blend mode.
public static SkiaSharp.SKShader CreateCompose (SkiaSharp.SKShader shaderA, SkiaSharp.SKShader shaderB, SkiaSharp.SKBlendMode mode);Parameters
- shaderA
- SKShader
The colors from this shader are seen as the destination by the blend mode.
- shaderB
- SKShader
The colors from this shader are seen as the source by the blend mode.
- mode
- SKBlendMode
The blend mode that combines the two shaders.
Returns
Returns a new SKShader, or an empty shader on error. This function never returns null.
