How to compile pixels? - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: HP Calculators (and very old HP Computers) (/forum-3.html) +--- Forum: General Forum (/forum-4.html) +--- Thread: How to compile pixels? (/thread-14094.html) How to compile pixels? - heavensabove - 12-03-2019 04:34 PM In the house 49g+/48gii aur have such a program:GROB number,then plot it.I want to know how to get that string of hexadecimal digits. RE: How to compile pixels? - Christoph Giesselink - 12-03-2019 08:45 PM The graphic example: Code: ``` OOOOO O     O O   O O O     OO O     O  OOOOO    O   OOO   O  O O O O O  O  O O  O   O O  O   O O     O O  O     O``` The graphic is coded line per line. The graphic has a width of 9 we habe to spend 2 bytes (a multiple of 8) per line. Let's split the graphic into nibbles, bit 0 first. The headline shows the value of each bit. Code: ```1248|1248|1248|1248  OOO|OO  |    | O   |  O |    | O   |O O |    | O   |  OO|    | O   |  O |    |  OOO|OO  |    |    O|    |    |   OO|O   |O   |  O O| O O|    | O  O|  O |    | O  O|    |    |   O |O   |    |  O  | O  |    | O   |  O |O   |  O  |   O|    |``` So looking at first Line replacing the blank with 0 the 'O' with 1 Line1, Nibble 0 = 0111 -> reverse -> 1110 -> E Line1, Nibble 1 = 1100 -> reverse -> 0011 -> 3 Line1, Nibble 2 = 0000 -> reverse -> 0000 -> 0 Line1, Nibble 3 = 0000 -> reverse -> 0000 -> 0 Line2, Nibble 0 = 1000 -> reverse -> 0001 -> 1 Line2, Nibble 1 = 0010 -> reverse -> 0100 -> 4 Line2, Nibble 2 = 0000 -> reverse -> 0000 -> 0 Line2, Nibble 3 = 0000 -> reverse -> 0000 -> 0 so doing the next lines until end. GROB width height E300 1400 1500 1C00 1400 E300 8000 C110 AA00 9400 9000 4100 2200 1410 2800 Written in the example: GROB 9 15 E300 140015001C001400E300 8000C110AA0094009000 4100220014102800