High CPU usage by sdl blitting

SDL Development
1

Hi all,

         I'm playing video using SDL, and using overlay, and for

button i’m having button.bmp and using loadbmp for getting that image on
sdl surface. then I’m doing SDL_BlitSurface, with button size, so its
consuming more cpu, is there any alternative solution for blit
function…???

please guide me…!!!
Thanks in advance… :slight_smile: :-)–
Lohitha R

2

IT consumes a lot of CPU because you have your BMP in one pixel formay and
your display is in another format.
After loadbmp call the SDL_DisplayFormat() function to convert image to
display pixel format, and SDL_BlitSurface will be hardware accelerated.On Mon, May 31, 2010 at 10:27 AM, Lohitha R <lohitha.r at globaledgesoft.com>wrote:

Hi all,

       I'm playing video using SDL, and using overlay, and for button

i’m having button.bmp and using loadbmp for getting that image on sdl
surface. then I’m doing SDL_BlitSurface, with button size, so its consuming
more cpu, is there any alternative solution for blit function…???

please guide me…!!!
Thanks in advance… :slight_smile: :slight_smile:

–
Lohitha R

SDL mailing list
SDL at lists.libsdl.org
http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org

3

Remember to free the original surface after converting it.
SDL_DisplayFormat() produces a second surface.

http://sdl.beuc.net/sdl.wiki/SDL_DisplayFormatOn Mon, May 31, 2010 at 4:09 AM, Sergiy Pylypenko <x.pelya.x at gmail.com> wrote:

IT consumes a lot of CPU because you have your BMP in one pixel formay and
your display is in another format.
After loadbmp call the SDL_DisplayFormat() function to convert image to
display pixel format, and SDL_BlitSurface will be hardware accelerated.

On Mon, May 31, 2010 at 10:27 AM, Lohitha R <lohitha.r at globaledgesoft.com> wrote:

Hi all,

? ? ? ? ? ?I’m playing video using SDL, and using overlay, and for button
i’m having button.bmp and using loadbmp for getting that image on sdl
surface. then I’m doing SDL_BlitSurface, with button size, so its consuming
more cpu, is there any alternative solution for blit function…???

please guide me…!!!
Thanks in advance… :slight_smile: :slight_smile:

–
Lohitha R

SDL mailing list
SDL at lists.libsdl.org
http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org

SDL mailing list
SDL at lists.libsdl.org
http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org

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