Add SDL_round and SDL_trunc

Author: suve

units/sdlstdinc.inc

@@ -296,6 +296,38 @@ function SDL_floor(x: cdouble): cdouble; cdecl;
 function SDL_floorf(x: cfloat): cfloat; cdecl;
   external SDL_LibName {$IFDEF DELPHI} {$IFDEF MACOS} name '_SDL_floorf' {$ENDIF} {$ENDIF};
 
+(**
+ * Round to nearest integer, away from zero.
+ *
+ * \since This function is available since SDL 2.0.16.
+ *)
+function SDL_lround(x: cdouble): clong; cdecl;
+  external SDL_LibName {$IFDEF DELPHI} {$IFDEF MACOS} name '_SDL_lround' {$ENDIF} {$ENDIF};
+
+(**
+ * Round to nearest integer, away from zero.
+ *
+ * \since This function is available since SDL 2.0.16.
+ *)
+function SDL_lroundf(x: cfloat): clong; cdecl;
+  external SDL_LibName {$IFDEF DELPHI} {$IFDEF MACOS} name '_SDL_lroundf' {$ENDIF} {$ENDIF};
+
+(**
+ * Round to nearest integral value, away from zero.
+ *
+ * \since This function is available since SDL 2.0.16.
+ *)
+function SDL_round(x: cdouble): cdouble; cdecl;
+  external SDL_LibName {$IFDEF DELPHI} {$IFDEF MACOS} name '_SDL_round' {$ENDIF} {$ENDIF};
+
+(**
+ * Round to nearest integral value, away from zero.
+ *
+ * \since This function is available since SDL 2.0.16.
+ *)
+function SDL_roundf(x: cfloat): cfloat; cdecl;
+  external SDL_LibName {$IFDEF DELPHI} {$IFDEF MACOS} name '_SDL_roundf' {$ENDIF} {$ENDIF};
+
 (**
  * Calculate the sine of x, where x is given in radians.
  *
@@ -328,6 +360,22 @@ function SDL_tan(x: cdouble): cdouble; cdecl;
 function SDL_tanf(x: cfloat): cfloat; cdecl;
   external SDL_LibName {$IFDEF DELPHI} {$IFDEF MACOS} name '_SDL_tanf' {$ENDIF} {$ENDIF};
 
+(**
+ * Round to nearest integral value, towards zero.
+ *
+ * \since This function is available since SDL 2.0.14.
+ *)
+function SDL_trunc(x: cdouble): cdouble; cdecl;
+  external SDL_LibName {$IFDEF DELPHI} {$IFDEF MACOS} name '_SDL_trunc' {$ENDIF} {$ENDIF};
+
+(**
+ * Round to nearest integral value, towards zero.
+ *
+ * \since This function is available since SDL 2.0.14.
+ *)
+function SDL_truncf(x: cfloat): cfloat; cdecl;
+  external SDL_LibName {$IFDEF DELPHI} {$IFDEF MACOS} name '_SDL_truncf' {$ENDIF} {$ENDIF};
+
 
 (*** --- iconv functions --- ***)