graphics engine

Graphics Engine

A typical CPU includes special-purpose graphics engine.
Graphics engines are common because many computers
have graphic displays, and a graphics engine can perform
common operations at high speed. For example, a graphics
engine might include facilities to move a rectangle across
a bit-mapped display or to repaint the surface of a graphical
figure after it has been moved.

Reference :
Hierarchial structure and Computational Engines.
Essentials of computer architecture. Douglas E. Comer

pngtools

pnginfo - display information on the PNG files named

$pnginfo wheel.png
wheel.png...
  Image Width: 1600 Image Length: 1200
  Bitdepth (Bits/Sample): 8
  Channels (Samples/Pixel): 4
  Pixel depth (Pixel Depth): 32
  Colour Type (Photometric Interpretation): RGB with alpha channel
  Image filter: Single row per byte filter
  Interlacing: No interlacing
  Compression Scheme: Deflate method 8, 32k window
  Resolution: 2835, 2835 (pixels per meter)
  FillOrder: msb-to-lsb
  Byte Order: Network (Big Endian)
  Number of text strings: 1 of 9
    Comment (xTXt deflate compressed): Created with GIMP

$

Related Code


src/main/gevents.c
20: * This is an implementation of modal event handling in R graphics
21: * by Duncan Murdoch
109: if (!count)
110: error(_("no graphics event handlers set"));
111:
svn.r-project.org/R/trunk - GPL - C

 

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