youngtrashbag / png-research Goto Github PK

Make a Function, that reads and returns a pointer(or reference?) to a vector<unsgined char>.
First a reference to the file gets passed as a parameter as a fstream &imageFile
The chunk name specified in the parameter as a char[4] (4 letters like IDAT or PLTE).
So the Signature would be:
vector<unsinged char>* GetChunkBuffer(fstream &imageFile, char[4] chunkName)

Integrate libpng into a small project.

mandelbrot type program made with libpng

The CRC (Circular Redundancy Check) is a Method to check, if there have been any errors while transferring the file. If the Check fails, the PNG Reader will mark it as Corrupt.

Make a Function to load each part of the Chunk, and therefore assigning the correct value to each attribute of the chunk class.

I want to add a command line paremeter functionality.
Probably do params like:

• -h --help
• -o file.png --output file.png
• --increment n
• --shift n

Make a Function that Shifts the Chars in a Chunk
e.g.
abc123 => 3abc12

Remove:

• bad comments
• commented lines of code, that are not usable anymore

add:

• better comments
• understandable comments