Save_bitmap loop

Save_bitmap loop

Eradicor

Member #2,992

December 2002

Ok. Dont ask why i need following, program code. Just suffice to say, i need it:

I need something like this ->

while(x = 1000) {
draw_certain_bitmap_full_of_stuff();
save_bitmap(certain_bitmap,"certain(int x).bmp");
}

Now it should do 1000 bmp files containing certain_bitmap and the file names should be:

certain1.bmp
certain2.bmp
certain3.bmp
certain4.bmp
etc
...

And for curious, no this is not for making screen capturing, but is ment for very special kind of animation program for our next film project.

FAST ANSWERS PLEASE.. And correct too!

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Mokkan

Member #4,355

February 2004

Like this?

int x = 1;
while(x <= 1000){
    char filename[64];
    sprintf(filename, "certain%d.bmp", x);
    draw_certain_bitmap_full_of_stuff();
    save_bitmap(certain_bitmap, filename);
    x++;
}

EDIT: Fixed code.

Onewing

Member #6,152

August 2005

Quote:

FAST ANSWERS PLEASE.. And correct too!

Sure! As soon as I find the question...

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CGamesPlay

Member #2,559

July 2002

Don't forget to increment x

[append]
IRC beats CGamesPlay to the edit.

--
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Ryan Patterson - <http://cgamesplay.com/>

Jonatan Hedborg

Member #4,886

July 2004

First i considered not answering, because of your well, arrogant, tone.

But what the hey, i feel like "giving".

And you obviously dont have any idea what you are doing.

for(int i=1; i<=1000; i++)
{
  draw_certain_bitmap_full_of_stuff(certain_bitmap);
  char tmp[256];
  sprintf(tmp,"certain%i.bmp",i);
  save_bitmap(certain_bitmap,tmp);
}

Untested, naturally, so i can't give any guarantees, but that should do it.

ReyBrujo

Moderator

January 2001

I would use %04d instead, to get 0001, 0002, 0003, etc. But it is just my taste.

--
RB
光子「あたしただ…奪う側に回ろうと思っただけよ」
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A J

Member #3,025

December 2002

i would be more concerned with people still using sprintf hasn't the last 3 years of "secure" programming hyperbole from just about everyone meant anything?

and whats with using file[64] and file[256] ? how about using MAX_PATH

and what about clearing it before using it ?

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Jonatan Hedborg

Member #4,886

July 2004

I heard it mentioned that sprintf is "bad" in some way. Please elaborate =)
You don't need to clear it afaik, as it overwrites anything in the buffer and terminates with a \0. And i agree that %04i or even %05i would be better than just plain %i.

Evert

Member #794

November 2000

Quote:

I heard it mentioned that sprintf is "bad" in some way. Please elaborate =)

Buffer overruns. It doesn't check if it writes outside the size of the allocated memory buffer (because you don't tell it the size of the memory buffer).

Quote:

You don't need to clear it afaik

Correct.

Jonatan Hedborg

Member #4,886

July 2004

Right. That would be bad. But it's not an issue here anyway.

A J

Member #3,025

December 2002

Bad code is always an issue.
This is computer science not poetry.
Computer science i tell you computer science.. mwahwhaaa!!

___________________________
The more you talk, the more AJ is right. - ML

Eradicor

Member #2,992

December 2002

Jonatan Hedborg said:

First i considered not answering, because of your well, arrogant, tone.

Heh thats new.

Well when you are on a hurry you dont have luxuary of being polite.

Anyway i solved this problem another way. Thanks however. That filename routine comes handy else where tho.

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{Creating realms from dreams since 1995}