'Declaration
 
Public Overloads Shared Sub ConvertColorSpace( _
   ByVal page As ImGearRasterPage, _
   ByVal newColorSpace As ImGearColorSpace, _
   ByVal doNotScalePixels As Boolean, _
   ByVal backgroundColor As ImGearPixel _
) 

'Usage
 
Dim page As ImGearRasterPage
Dim newColorSpace As ImGearColorSpace
Dim doNotScalePixels As Boolean
Dim backgroundColor As ImGearPixel
 
ImGearRasterProcessing.ConvertColorSpace(page, newColorSpace, doNotScalePixels, backgroundColor)

public static void ConvertColorSpace( 
   ImGearRasterPage page,
   ImGearColorSpace newColorSpace,
   bool doNotScalePixels,
   ImGearPixel backgroundColor
)

public: static void ConvertColorSpace( 
   ImGearRasterPage* page,
   ImGearColorSpace newColorSpace,
   bool doNotScalePixels,
   ImGearPixel* backgroundColor
) 

public:
static void ConvertColorSpace( 
   ImGearRasterPage^ page,
   ImGearColorSpace newColorSpace,
   bool doNotScalePixels,
   ImGearPixel^ backgroundColor
) 

Parameters

page

Image to change color space.

newColorSpace

New color space.

doNotScalePixels

Flag indicating whether to change pixel values according to the new color space.

backgroundColor

Background to composite the image over when removing alpha channel.

If conversion removes the alpha channel from an image, the image is composited over a solid background specified by BackColor. BackColor should be in the same color space as the original image, but without the Alpha channel. For example, if original image is in RGBA color space and newColorSpace is CMYK, BackColor should have RGB color space. The method will first transform the image into RGB and then to CMYK.

The following formula is used to burn alpha (i.e., to convert from RGBA/P to RGB):

• If Page is not pre-multiplied: I = I * A + B (1-A)
• If Page is pre-multiplied: I = I + B (1-A)

If the image contains extra channels, and newColorSpace contains extra channels, the method does not change them.

Reference