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BrightnessContrastParams structure (gdipluseffects.h)

  • Article

A BrightnessContrastParams structure contains members that specify the nature of a brightness or contrast adjustment.

You can change the brightness or contrast (or both) of a bitmap by following these steps.

  1. Create and initialize a BrightnessContrastParams structure.
  2. Pass the address of the BrightnessContrastParams structure to the BrightnessContrast::SetParameters method of a BrightnessContrast object.
  3. Pass the address of the BrightnessContrast object to the Graphics::DrawImage method or to the Bitmap::ApplyEffect method.

Syntax

struct BrightnessContrastParams {
  INT brightnessLevel;
  INT contrastLevel;
};

Members

brightnessLevel

Type: INT

Integer in the range -255 through 255 that specifies the brightness level. If the value is 0, the brightness remains the same. As the value moves from 0 to 255, the brightness of the image increases. As the value moves from 0 to -255, the brightness of the image decreases.

contrastLevel

Type: INT

Integer in the range -100 through 100 that specifies the contrast level. If the value is 0, the contrast remains the same. As the value moves from 0 to 100, the contrast of the image increases. As the value moves from 0 to -100, the contrast of the image decreases.

Requirements

Requirement Value
Minimum supported client Windows Vista [desktop apps only]
Minimum supported server Windows Server 2008 [desktop apps only]
Header gdipluseffects.h (include Gdiplus.h)