• NAME
• SYNOPSIS
• FUNCTION DESCRIPTIONS
  • Constrast
  • GenerateNoise
  • HSLTransform
  • Hull
  • InsidePrimitive
  • Interpolate
  • Modulate
  • TransformHSL
  • Upsample

NAME

SYNOPSIS

HSLTransform(hue,saturation,luminosity,red,green,blue)

Hull(x_offset,y_offset,polarity,columns,rows,f,g)

status=InsidePrimitive(primitive_info,annotate_info,x,y,image)

Interpolate(image,pixel,x,y)

TransformHSL(red,green,blue,hue,saturation,luminosity)

Upsample(width,height,scaled_width,pixels)

FUNCTION DESCRIPTIONS

Constrast

The format of the ContrastImage routine is:

    Contrast(sign,red,green,blue)

A description of each parameter follows:

o sign:

A positive value enhances the contrast otherwise it is reduced.

o red, green, blue:

A pointer to a pixel component of type Quantum.

GenerateNoise

The format of the GenerateNoise routine is:

        GenerateNoise(pixel,noise_type)

A description of each parameter follows:

o pixel:

A structure of type Quantum.

o noise_type:

The type of noise: gaussian, multiplicative gaussian, impulse, laplacian, or poisson.

HSLTransform

The format of the HSLTransformImage routine is:

        HSLTransform(hue,saturation,luminosity,red,green,blue)

A description of each parameter follows:

o hue, saturation, luminosity:

A double value representing a component of the HSL color space.

o red, green, blue:

A pointer to a pixel component of type Quantum.

Hull

The format of the Hull routine is:

        Hull(x_offset,y_offset,polarity,columns,rows,f,g)

A description of each parameter follows:

o x_offset, y_offset:

An integer value representing the offset of the current pixel within the image.

o polarity:

An integer value declaring the polarity (+,-).

o columns, rows:

Specifies the number of rows and columns in the image.

o f, g:

A pointer to an image pixel and one of it's neighbor.

InsidePrimitive

The format of the InsidePrimitive routine is:

        status=InsidePrimitive(primitive_info,annotate_info,x,y,image)

A description of each parameter follows:

o status:

Function InsidePrimitive returns True if the (x,y) position is inside the primitive as defined in primitive_info. Otherwise False is returned.

o primitive_info:

Specifies a pointer to a PrimitiveInfo structure.

o annotate_info:

Specifies a pointer to a AnnotateInfo structure.

o x,y:

Integers representing the (x,y) location in the image.

o image:

The address of a structure of type Image.

Interpolate

The format of the Interpolate routine is:

        Interpolate(image,pixel,x,y)

A description of each parameter follows:

o image:

The address of a structure of type Image.

o pixel:

A pointer to a RunlengthPacket representing the current pixel.

o x,y:

A double representing the current (x,y) position of the pixel.

Modulate

The format of the ModulateImage routine is:

    Modulate(percent_hue,percent_saturation,percent_luminosity,red,green,

      blue)

A description of each parameter follows:

o percent_hue, percent_saturation, percent_luminosity:

A double value representing the percent change in a component of the HSL color space.

o red, green, blue:

A pointer to a pixel component of type Quantum.

TransformHSL

The format of the TransformHSL routine is:

        TransformHSL(red,green,blue,hue,saturation,luminosity)

A description of each parameter follows:

o red, green, blue:

A Quantum value representing the red, green, and blue component of a pixel..

o hue, saturation, luminosity:

A pointer to a double value representing a component of the HSL color space.

Upsample

The format of the UpSample routine is:

        Upsample(width,height,scaled_width,pixels)

A description of each parameter follows:

o width,height:

Unsigned values representinf the width and height of the image pixel array.

o scaled_width:

Specifies the final width of the upsampled pixel array.

o pixels:

An unsigned char containing the pixel data. On output the upsampled pixels are returned here.