The CILY Programming Language

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The CILY Programming Language

• Exactly What the World Needed

2
Why Use CILY?

• One can perform basic to advanced image
  manipulation operations using an iterative
  language (no GUI needed)
• Very safe, robust and easy to use
• Its works cross-platform
• Unlike Photoshop and Dreamweaver, CILY is FREE!

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Basic CILY Features

• Loading and saving images (or entire directory of
  images) for manipulation
• Selecting rectangle or oval of pixels
• Resizing, rotating, flipping, blurring,
  sharpening, brightening, cropping, inverting,
  edge detecting, and converting to grayscale

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More Advanced Features

• Getting and setting pixel values of an image
• Magic wand selection of pixels
• Creating a web album from a directory of images

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CILY Example Batch Image Sharpening

• CILY source code is as follows
• main() array Image imgs
  OpenDir(c\) foreach i in imgs
  Sharpen(i) Save(i)

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Example CILY Syntax

• function void ConvertToColor(Pixel p, Color c)
• p-gtcolor c
• return
• main()
• var Image i Open("images_original/earth.jpg")
• var Color black Color(0,0,0)
• var Color darkRed Color(130, 25, 25)
• ConvertToGrayScale(i)
• array Pixel pixels MagicWand(i, Color(0, 0,
  0), 10)
• foreach j in pixels
• ConvertToColor(pixelsj, darkRed)
• Paste(i, pixels)
• SaveAs(i, "earthgray.jpg")

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Output of Previous Example
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Control Structures

• Expressions
• var int a foo() 3 (a b)
• Loops
• foreach i in imgs print(imgsi-gtfilename)
  
• Functions
• function void foo() return
• Library objects and functions
• Brighten(image)Color c Color(255,255,0)

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Compiling CILY Programs
main() var Image i Open(blah.jpg)
Blur(i)
Syntax error at line 1 token unexpected .
import java.io. public class test2 public
static void main(String args) try
CILYImage i CILYLibrary.Open("blah.jpg")
CILYLibrary.Blur(i) catch
(ArrayIndexOutOfBoundsException aioobe)
System.err.println("RUNTIME ERROR Array index
out of bounds") catch (Exception e)
System.err.println("RUNTIME ERROR Unable
to read or write to file")
Error at line 2 a not declared
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Compiling CILY Programs
Lexer/Parser
Tree Parser
CILY Program
Error Checker
Code Gen
Syntax Errors
Semantic Errors
Java program
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Generated Code

• Compiler takes CILY program and generates an
  analogous Java program.
• Java program compiled and run using J2E 1.4.01
• Java runtime used to run the program.

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Some examples of what CILY can do
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Photo Album Creator

• Create photo albums with a call to one CILY
  library function
• Different album styles available

14
Testing

• Automated test suite to run regression tests
  after every major grammar change. Syntax error
  checking automatically checked
• Semantic error checking was done partially
  automatically, partially manually.
• Took a few days to implement, but saved us a lot
  of valuable time down the stretch

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Lessons Learned

• Peer Programming VERY valuable
• Learned how to move on when little errors kept
  us from shipping.
• Diff people testing vs. coding
• Learn to trust your group
• Learn to like your group