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Fixed bug 2441 - SDL_DuplicateSurface

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Rainer Deyke

I've written a small patch that adds a small SDL_DuplicateSurface function to SDL.  I've written the function as part of a larger (as yet unfinished) patch, but I think this function is useful enough that it merits inclusion in SDL on its own.
This commit is contained in:
Sam Lantinga 2017-08-14 13:37:14 -07:00
parent 46f0a0bb0c
commit b4557f9901
4 changed files with 25 additions and 0 deletions
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18
src/video/SDL_surface.c
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@ -870,6 +870,15 @@ SDL_UnlockSurface(SDL_Surface * surface)
}
}
/*
* Creates a new surface identical to the existing surface
*/
SDL_Surface *
SDL_DuplicateSurface(SDL_Surface * surface)
{
return SDL_ConvertSurface(surface, surface->format, surface->flags);
}
/*
* Convert a surface into the specified pixel format.
*/
@ -882,6 +891,15 @@ SDL_ConvertSurface(SDL_Surface * surface, const SDL_PixelFormat * format,
SDL_Color copy_color;
SDL_Rect bounds;
if (!surface) {
SDL_InvalidParamError("surface");
return NULL;
}
if (!format) {
SDL_InvalidParamError("format");
return NULL;
}
/* Check for empty destination palette! (results in empty image) */
if (format->palette != NULL) {
int i;