Graphics Kernel System (GKS).pptx

GKS

1. Graphics Kernel System (GKS) The Graphical Kernel System (GKS) was the first ISO standard for computer graphics in low-level, established in 1977. GKS offers a group of drawing aspects for 2D vector graphics appropriate for mapping and related duties. The calls are defined to be moveable across various programming languages, graphics hardware, so that applications noted to use GKS will be willingly portable to different devices and platforms . The following documents are representing GKS standards:   The language bindings are called in ISO 8651 standard.ANSI X3.124 (1985) is part of ANSI standard.   ISO/IEC 7942 noted in ISO standard, first part of 1985 and two to four parts of 1997-99.   ISO 8805 and ISO 8806.  

2. B asic parts The GKS consists of three basic parts: i )       A casual exhibition of the substances of the standard which contains such things as how text is placed, how polygonal zones are to be filled, and so onward. ii )     An official of the  descriptive  material in ( i ), by way of conceptual the ideas into separate functional explanations. These functional descriptions have such data as descriptions of input and output parameters, specific descriptions of the result of every function should have references into the  descriptive  material in ( i ), and a description of fault situation. The functional descriptions in this division are language autonomous. iii )  Language bindings are an execution of the abstract functions explained in (ii). in a explicit computer language such as C .

3. classes The GKS functions are separated into those which pass values to GKS for control, setting or output, and those which inquire about status information. There are 8 distinct classes: 1. Control functions        5. Transformations 2. Output Attributes       6. Input functions 3. Output Primitives       7. Metafile functions 4. Segment functions      8. Inquiry functions