internal Paint(Colour colour) : this(Matrix3X2 <float> .Identity, default, default, default, colour, colour, default)
{
}
/// <summary>
/// Creates and returns a linerar gradient.
/// The gradient is transformed by the current transform when it is passed to NvgRenderStyle.FillPaint() or NvgRenderStyle.StrokePaint().
/// </summary>
/// <param name="s">Specifies the start coordinates of the linear gradient.</param>
/// <param name="e">Specifies the end coordinates of the linear gradient.</param>
/// <param name="icol">Specifies the start colour.</param>
/// <param name="ocol">Specifies the end colour.</param>
public static Paint LinearGradient(Vector2D <float> s, Vector2D <float> e, Colour icol, Colour ocol)
{
const float large = 1e5f;
Vector2D <float> delta = e - s;
float d = MathF.Sqrt(delta.X * delta.X + delta.Y * delta.Y);
if (d > 0.0001f)
{
delta /= d;
}
else
{
delta = new(0, 1);
}
Matrix3X2 <float> transform = new
(
delta.Y, -delta.X,
delta.X, delta.Y,
s.X - delta.X * large, s.Y - delta.Y * large
);
Vector2D <float> extent = new(large, large + d * 0.5f);
return(new Paint(transform, extent, 0.0f, MathF.Max(1.0f, d), icol, ocol, default));
}
/// <summary> /// Creates and returns a radial gradient. /// The gradient is transformed by the current transform when it is passed to NvgRenderStyle.FillPaint() or NvgRenderStyle.StrokePaint(). /// </summary> /// <param name="cx">The centre's x-coordinate.</param> /// <param name="cy">The centre's y-coordinate.</param> /// <param name="inr">Specifies the inner radius of the gradient.</param> /// <param name="outr">Specifies the outer radius of the gradient.</param> /// <param name="icol">Specifies the start colour.</param> /// <param name="ocol">Specifies the end colour.</param> /// <returns></returns> public static Paint RadialGradient(float cx, float cy, float inr, float outr, Colour icol, Colour ocol) => RadialGradient(new Vector2D <float>(cx, cy), inr, outr, icol, ocol);
public Paint(Matrix3X2 <float> transform, Vector2D <float> extent, float radius, float feather, Colour innerColour, Colour outerColour, int image)
{
Transform = transform;
Extent = extent;
Radius = radius;
Feather = feather;
InnerColour = innerColour;
OuterColour = outerColour;
Image = image;
}
/// <summary>
/// Creates and returns a radial gradient.
/// The gradient is transformed by the current transform when it is passed to NvgRenderStyle.FillPaint() or NvgRenderStyle.StrokePaint().
/// </summary>
/// <param name="c">The centre.</param>
/// <param name="inr">Specifies the inner radius of the gradient.</param>
/// <param name="outr">Specifies the outer radius of the gradient.</param>
/// <param name="icol">Specifies the start colour.</param>
/// <param name="ocol">Specifies the end colour.</param>
/// <returns></returns>
public static Paint RadialGradient(Vector2D <float> c, float inr, float outr, Colour icol, Colour ocol)
{
float r = (inr + outr) * 0.5f;
float f = (outr - inr);
Matrix3X2 <float> transform = Matrix3X2 <float> .Identity;
transform.M31 = c.X;
transform.M32 = c.Y;
Vector2D <float> extent = new(r);
return(new Paint(transform, extent, r, MathF.Max(1.0f, f), icol, ocol, default));
}
/// <summary> /// Creates and returns a linear gradient. Box gradient is a feathered rounded rectangle, it is useful for rendering /// drop shadows or highlitghts for boxes. Feather defines how blurry the corner of the rectangle is. The gradient /// is transformed by the current transform when it is passed to NvgRenderStyle.FillPaint() or NvgRenderStyle.StrokePaint(); /// </summary> /// <param name="x">The left size of the rectangle.</param> /// <param name="y">The top of the rectangle.</param> /// <param name="w">The width of the rectangle.</param> /// <param name="h">The height of the rectangle.</param> /// <param name="r">Defines the corner radius.</param> /// <param name="f">Defines the feather.</param> /// <param name="icol">Inner colour of the gradient.</param> /// <param name="ocol">Outer colour of the gradient.</param> /// <returns></returns> public static Paint BoxGradient(float x, float y, float w, float h, float r, float f, Colour icol, Colour ocol) => BoxGradient(new Rectangle <float>(new Vector2D <float>(x, y), new Vector2D <float>(w, h)), r, f, icol, ocol);
/// <summary> /// Creates and returns a linear gradient. Box gradient is a feathered rounded rectangle, it is useful for rendering /// drop shadows or highlitghts for boxes. Feather defines how blurry the corner of the rectangle is. The gradient /// is transformed by the current transform when it is passed to NvgRenderStyle.FillPaint() or NvgRenderStyle.StrokePaint(); /// </summary> /// <param name="pos">The top-left corner of the rectangle.</param> /// <param name="size">The size of the rectangle.</param> /// <param name="r">Defines the corner radius.</param> /// <param name="f">Defines the feather.</param> /// <param name="icol">Inner colour of the gradient.</param> /// <param name="ocol">Outer colour of the gradient.</param> /// <returns></returns> public static Paint BoxGradient(Vector2D <float> pos, Vector2D <float> size, float r, float f, Colour icol, Colour ocol) => BoxGradient(new Rectangle <float>(pos, size), r, f, icol, ocol);
/// <summary>
/// Creates and returns a linear gradient. Box gradient is a feathered rounded rectangle, it is useful for rendering
/// drop shadows or highlitghts for boxes. Feather defines how blurry the corner of the rectangle is. The gradient
/// is transformed by the current transform when it is passed to NvgRenderStyle.FillPaint() or NvgRenderStyle.StrokePaint();
/// </summary>
/// <param name="box">The rectangle.</param>
/// <param name="r">Defines the corner radius.</param>
/// <param name="f">Defines the feather.</param>
/// <param name="icol">Inner colour of the gradient.</param>
/// <param name="ocol">Outer colour of the gradient.</param>
/// <returns></returns>
public static Paint BoxGradient(Rectangle <float> box, float r, float f, Colour icol, Colour ocol)
{
Matrix3X2 <float> transform = Matrix3X2 <float> .Identity;
transform.M31 = box.Center.X;
transform.M32 = box.Center.Y;
Vector2D <float> extent = box.Size * 0.5f;
return(new Paint(transform, extent, r, MathF.Max(1.0f, f), icol, ocol, default));
}
/// <summary> /// Creates and returns a linerar gradient. /// The gradient is transformed by the current transform when it is passed to NvgRenderStyle.FillPaint() or NvgRenderStyle.StrokePaint(). /// </summary> /// <param name="sx">Specifies the start X-coordinates of the linear gradient.</param> /// <param name="sy">Specifies the start Y-coordinates of the linear gradient.</param> /// <param name="ex">Specifies the end X-coordinates of the linear gradient.</param> /// <param name="ey">Specifies the end Y-coordinates of the linear gradient.</param> /// <param name="icol">Specifies the start colour.</param> /// <param name="ocol">Specifies the end colour.</param> public static Paint LinearGradient(float sx, float sy, float ex, float ey, Colour icol, Colour ocol) => LinearGradient(new Vector2D <float>(sx, sy), new Vector2D <float>(ex, ey), icol, ocol);
