Image Manipulation Functions

SDL Development
1

Hi.

I have looking through the SDL documentation and
I haven’t found any kind of funtion that do the following thing:

it takes two arguments:

  1. the color that will be changed
  2. the color that will replace the first color ( 1 )
  3. the source surface
  4. destination surface

is there any kind of library that do the this ??–
Best Regards
Michal ‘coldblood’ przybylowicz

2

This is not in SDL. But it should be no problem to write such a
function. You could try the getpixel() and putpixel() functions
(http://sdldoc.csn.ul.ie/guidevideo.php#AEN112), or maybe look for a
library that has a function like this. (http://www.libsdl.org/libraries.php)

Bernhard

coldblood wrote:> Hi.

I have looking through the SDL documentation and
I haven’t found any kind of funtion that do the following thing:

it takes two arguments:

  1. the color that will be changed
  2. the color that will replace the first color ( 1 )
  3. the source surface
  4. destination surface

is there any kind of library that do the this ??

–
Best Regards
Michal ‘coldblood’ przybylowicz

SDL mailing list
SDL at libsdl.org
http://www.libsdl.org/mailman/listinfo/sdl

3

coldblood wrote:

Hi.

I have looking through the SDL documentation and
I haven’t found any kind of funtion that do the following thing:

it takes two arguments:

  1. the color that will be changed

Let’s call this color1

  1. the color that will replace the first color ( 1 )

Let’s call this color2 (yeah :slight_smile:

  1. the source surface
  2. destination surface

is there any kind of library that do the this ??

You can hack it the following way with minimal work :

  • set colorkey on the source surface to color1
  • fill destination surface with SDL_FillRect(color2)
  • blit source to dest

Stephane