IOb-PNG-E-Software

Contains all the necessary software to encode a valid PNG image without dependencies on any external libraries by using the LodePNG encoder (more information about this open-source encoder can be found at the end of the header file).

Configuring the Input and Output files

To configure the names of the input and output files, the parameters on the Makefile can be edited, or they can be passed through the command line. The parameters are:

• RAW_NAME (default = x_pattern.raw): Sets the input raw image file name
• PNG_NAME (default = x_pattern.png): Sets the output .png file name
• IMG_WIDTH (default = 255): Sets the image width
• IMG_HEIGHT (default = 255): Sets the image height
• IMG_COLOR_TYPE (default = 0): Sets the image color type (0 = grayscale, 2 = RGB, 3 = indexed color, 4 = grayscale with alpha, 6 = RGBA)
• IMG_BIT_DEPTH (default = 8): Sets the image bit depth
• WINDOW_SIZE (default = 1024): Sets the window size for the LZ77 compression
• IDAT_BUFFER_SIZE (default = 2048): Sets the IDAT buffer size for the LZ77 compression

Running and cleaning the encoder

To build and run the PNG encoder, run the command:

make run [RAW_NAME=<input raw file name>] [PNG_NAME=<output png file name>] [IMG_WIDTH=<image width>] [IMG_HEIGHT=<image height>] [IMG_COLOR_TYPE=<image color type>] [IMG_BIT_DEPTH=<image bit depth>] [WINDOW_SIZE=<window size>] [IDAT_BUFFER_SIZE=<IDAT buffer size>]

To use a fresh build and run the PNG encoder, run the command:

make all [RAW_NAME=<input raw file name>] [PNG_NAME=<output png file name>] [IMG_WIDTH=<image width>] [IMG_HEIGHT=<image height>] [IMG_COLOR_TYPE=<image color type>] [IMG_BIT_DEPTH=<image bit depth>] [WINDOW_SIZE=<window size>] [IDAT_BUFFER_SIZE=<IDAT buffer size>]

To clean the PNG decoder, run the command:

make clean