class Hpdf::Raw::GrayImage
- Hpdf::Raw::GrayImage
- Hpdf::Raw::Image
- Reference
- Object
Overview
create a new in-memory image with gray scale. Import using Doc#load_raw_image_from_mem
Defined in:
hpdf/raw_image.crConstructors
Instance Method Summary
-
#[]=(x : Number, y : Number, scale : Number)
sets the gray value at
xandyviascale. -
#gray_at(x : UInt32, y : UInt32, scale : UInt8)
sets the gray value at
xandyviascale.
Instance methods inherited from class Hpdf::Raw::Image
color_space : Hpdf::ColorSpace
color_space,
height : UInt32
height,
to_unsafe
to_unsafe,
width : UInt32
width
Constructor methods inherited from class Hpdf::Raw::Image
new(width : UInt32, height : UInt32, color_space : ColorSpace)
new
Constructor Detail
Instance Method Detail
def []=(x : Number, y : Number, scale : Number)
#
sets the gray value at x and y via scale.
0xff is white and 0x00 is black.
def gray_at(x : UInt32, y : UInt32, scale : UInt8)
#
sets the gray value at x and y via scale.
0xff is white and 0x00 is black.