Mercurial > sdl-ios-xcode
view docs/man3/SDL_ConvertSurface.3 @ 4355:9b464226e541 SDL-1.2
Fixed bug #855
Ludwig Nussel 2009-10-18 06:31:52 PDT
an mprotect call was added to fix bug 528. However that results in a buffer
that allows writing and code execution. Ie the no-execute security features of
modern operating systems are defeated this way. Two mprotect calls are needed.
One to make the buffer executable but not writeable when done and another one
to make the buffer writeable again if the content needs to be changed.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 18 Oct 2009 17:31:37 +0000 |
| parents | 1238da4a7112 |
| children |
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.TH "SDL_ConvertSurface" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" .SH "NAME" SDL_ConvertSurface \- Converts a surface to the same format as another surface\&. .SH "SYNOPSIS" .PP \fB#include "SDL/SDL\&.h" .sp \fBSDL_Surface *\fBSDL_ConvertSurface\fP\fR(\fBSDL_Surface *src, SDL_PixelFormat *fmt, Uint32 flags\fR); .SH "DESCRIPTION" .PP Creates a new surface of the specified format, and then copies and maps the given surface to it\&. If this function fails, it returns \fBNULL\fP\&. .PP The \fBflags\fR parameter is passed to \fI\fBSDL_CreateRGBSurface\fP\fR and has those semantics\&. .PP This function is used internally by \fI\fBSDL_DisplayFormat\fP\fR\&. .PP This function can only be called after SDL_Init\&. .SH "RETURN VALUE" .PP Returns either a pointer to the new surface, or \fBNULL\fP on error\&. .SH "SEE ALSO" .PP \fI\fBSDL_CreateRGBSurface\fP\fR, \fI\fBSDL_DisplayFormat\fP\fR, \fI\fBSDL_PixelFormat\fR\fR, \fI\fBSDL_Surface\fR\fR .\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01