LinearGradientBrush::SetInterpolationColors method (gdiplusbrush.h)

The LinearGradientBrush::SetInterpolationColors method sets the colors to be interpolated for this linear gradient brush and their corresponding blend positions.

Syntax

Status SetInterpolationColors(
  [in] const Color *presetColors,
  [in] const REAL  *blendPositions,
  [in] INT         count
);

Parameters

[in] presetColors

Type: const Color*

Pointer to an array of Color objects that specify the colors to be interpolated for this linear gradient brush. A color of a given index in the presetColors array corresponds to the blend position of that same index in the blendPositions array.

[in] blendPositions

Type: const REAL*

Pointer to an array of real numbers that specify the blend positions. Each number in the array specifies a percentage of the distance between the starting boundary and the ending boundary and is in the range from 0.0 through 1.0, where 0.0 indicates the starting boundary of the gradient and 1.0 indicates the ending boundary. There must be at least two positions specified: the first position, which is always 0.0f, and the last position, which is always 1.0f. Otherwise, the behavior is undefined. A blend position between 0.0 and 1.0 indicates the line, parallel to the boundary lines, that is a certain fraction of the distance from the starting boundary to the ending boundary. For example, a blend position of 0.7 indicates the line that is 70 percent of the distance from the starting boundary to the ending boundary. The color is constant on lines that are parallel to the boundary lines.

[in] count

Type: INT

Integer that specifies the number of elements in the presetColors array. This is the same as the number of elements in the blendPositions array.

Return value

Type: Status

If the method succeeds, it returns Ok, which is an element of the Status enumeration.

If the method fails, it returns one of the other elements of the Status enumeration.

Requirements

See also

Brushes and Filled Shapes

Color

Creating a Linear Gradient

Filling a Shape with a Color Gradient

LinearGradientBrush

LinearGradientBrush::GetInterpolationColors