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| Acmlm's Board - I2 Archive - Programming - Learning Delphi |
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ETG Tektite Level: 14 Posts: 8/60 EXP: 11348 For next: 1723 Since: 03-16-04 From: Texas Since last post: 6 days Last activity: 5 hours |
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| I have a copy of Delphi 7 enterprise edition, which I choose because it seems to work alot like Director, and am trying to learn to program with it. I've done a little bit of many things (C++, x86 ASM, Lingo, Qbasic) but never enough to do anything usefull. I've got some books and searched online, but nothing I have found really helps to do what I want to do, so I'm gonna do it this way. My end goal is to create a full featured editor bit by bit. To do this I'll state a funtion I want to work on and someone (like you there reading this.... you do know Delphi don't you?) can teach me or atleast direct me to where the answer can be found. This way it will be half being taught and half learning on my own and should be quite effective. So far I have made a program where you push the button and it changes the text of a label (from an online tutorial.) I'd like to start off with an editor to move and change the proporties of the sprites on the title screen. To do this I need to load a file, get bytes from a certian offset in the file, and display them in the proper boxes. Then I'll need to change them and save them back in the rom. What options do I have to do this? |
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dan Snap Dragon Level: 43  Posts: 39/782 EXP: 534516 For next: 30530 Since: 03-15-04 Since last post: 20 hours Last activity: 14 hours |
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| Well, to if you want to load a few bytes from a reasonably small file (say, a NES file), you could always load the file into memory. Declare an array of bytes in the 'interface' section of your code like so: var _ROM : Array of Byte; Then, create a function called LoadFile: procedure LoadFile(pFilename: String); var FileSizeInBytes : Longword; Mem : TMemoryStream; ByteCounter : Longword; begin Mem := TMemoryStream.Create(); // open the file try Mem.LoadFromFile(pFilename); FileSizeInBytes := Mem.Size; SetLength(_ROM, FileSizeInBytes); // re-dimension the array to hold the file ByteCounter := 0; // start at the beginning of the array // hooray for streams...no loop Mem.Read(_ROM[ByteCounter], FileSizeInBytes); finally FreeAndNil(Mem); // memory cleanup end; end; As for the displaying of graphics, that is a bit more work. I definitely recommend getting a book on Delphi, such as one of the Mastering Delphi series by Marco Cantu (depending on which version of Delphi you have). You should be able to get the PDF version off your local friendly file sharing application maybe.  (edited by dan on 04-10-04 06:26 AM) |
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