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Save from memory to file

yolis
yolis asked
on
Medium Priority
229 Views
Last Modified: 2010-04-16
Hya there, i made this cool drawing program, the drawing is showen on
like a bar(100,100,400,400) and i wanted to know how i can save the drawing to a file. im using the graph unit. all i know is how to save to the memory using getimage, and to load it using putimage, but how can i
save it to a FILE and then to load it?
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Author

Commented:
Edited text of question
Commented:
It is very simple. Just create a file of your buffer that you use with  getimage. For example:

type  
  buffer=array[1..9000] of byte;
var
  b1:buffer;
  f1:file of buffer;
begin
 getimage(100,100,400,400,buffer );
 asign(f1,'myfile.xxx');
 rewrite(f1);
 write(f1,b1);
 close(f1)
end;

 With the procedure "read(f1,b1)" instead of the "write" you can load the buffer from the file and then put it on the screen. Of course in this case you must "reset" the file instead of "rewrite" it.

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Author

Commented:
its not working!!

to use getimage, i must use the command getmem, and to use getmem i need to give it a variable of pointer..,
so.. what to do?

Author

Commented:
its nor working!, i need to use getmem
and getmem only works with pointers!

Commented:
First, you don't need to use getmem with the getimage. You can use a simple variable as a buffer as i show you in the example (but of cource the size of the variable must be aproptiate).

Second, if you want to use a pointer as a buffer (and use the getmem to hold the memory for the pointer) a little changes in the example i gave you. You will add the commands for the pointer (getmem e.t.c.) and change the command "write" as follows:

 write(f1,p^)

where p is the pointer you used with getmem.

p.s. Thanks for the points. I 'll try to help you till the end.

Author

Commented:
Alright!!, it works!!!, Thaaank you!, i would give you more points if i could.. :)

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