GammaFilter Method

To change the gamma in a image then use the GammaFilter function.

Parameters

src

The source picture to work with. This picture has to be 32 bits per pixel.

red

The gamma value for the red color channel.
(The value is in range from 0.2 to 5.0 where 1.0 is the normal state)

green

The gamma value for the green color channel.
(The value is in range from 0.2 to 5.0 where 1.0 is the normal state)

blue

The gamma value for the blue color channel.
(The value is in range from 0.2 to 5.0 where 1.0 is the normal state)

mask

To limit the filtering to certain pixels then set a picture defining the mask to this parameter. Pass nil to this parameter if the filtering should not be limited to certain pixels.

The mask picture must be a 32 bit picture and must be same size as the src picture. If the mask picture is not 32 bits and same size as the src picture then the function will fail and leave the result picture unchanged.

progress

Use this parameter to use a progress class to get progress feedback from this function. This class must be a class that Implements the IProgressHandler Interface which is defined in this plugin.

Pass nil to this parameter if you don't need progress feedback.

Progress feedback will slow the filter down.

Returns

Picture

If the filter was successful: A reference to the modified picture.

If the src picture was not 32 bits then a nil will be returned.

This filter will allocate memory so a Nil is also returned if not enough memory could be allocated for it or if the mask parameter contained invalid mask picture.

Remarks

Supported Platforms: