##### pygame documentation

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## src_c/base.c

This extension module defines general purpose routines for starting and stopping SDL as well as various conversion routines uses elsewhere in pygame.

C header: src_c/include/pygame.h

PyObject *pgExc_SDLError

  This is `pygame.error`, the exception type used to raise SDL errors.

int pg_mod_autoinit(const char *modname)

  Inits a pygame module, which has the name `modname` Return `1` on success, `0` on error, with python error set.

void pg_mod_autoquit(const char *modname)

  Quits a pygame module, which has the name `modname`

void pg_RegisterQuit(void (*f)(void))

  Register function f as a callback on Pygame termination. Multiple functions can be registered. Functions are called in the reverse order they were registered.

int pg_IntFromObj(PyObject *obj, int *val)

  Convert number like object obj to C int and place in argument val. Return `1` on success, else `0`. No Python exceptions are raised.

int pg_IntFromObjIndex(PyObject *obj, int index, int *val)

  Convert number like object at position i in sequence obj to C int and place in argument val. Return `1` on success, `0` on failure. No Python exceptions are raised.

int pg_TwoIntsFromObj(PyObject *obj, int *val1, int *v2)

  Convert the two number like objects in length 2 sequence obj to C int and place in arguments val1 and val2 respectively. Return `1` on success, `0` on failure. No Python exceptions are raised.

int pg_FloatFromObj(PyObject *obj, float *val)

  Convert number like object obj to C float and place in argument val. Returns `1` on success, `0` on failure. No Python exceptions are raised.

int pg_FloatFromObjIndex(PyObject *obj, int index, float *val)

  Convert number like object at position i in sequence obj to C float and place in argument val. Return `1` on success, else `0`. No Python exceptions are raised.

int pg_TwoFloatsFromObj(PyObject *obj, float *val1, float *val2)

  Convert the two number like objects in length 2 sequence obj to C float and place in arguments val1 and val2 respectively. Return `1` on success, else `0`. No Python exceptions are raised.

int pg_UintFromObj(PyObject *obj, Uint32 *val)

  Convert number like object obj to unsigned 32 bit integer and place in argument val. Return `1` on success, else `0`. No Python exceptions are raised.

int pg_UintFromObjIndex(PyObject *obj, int _index, Uint32 *val)

  Convert number like object at position i in sequence obj to unsigned 32 bit integer and place in argument val. Return `1` on success, else `0`. No Python exceptions are raised.

int pg_RGBAFromObj(PyObject *obj, Uint8 *RGBA)

  Convert the color represented by object obj into a red, green, blue, alpha length 4 C array RGBA. The object must be a length 3 or 4 sequence of numbers having values between 0 and 255 inclusive. For a length 3 sequence an alpha value of 255 is assumed. Return `1` on success, `0` otherwise. No Python exceptions are raised.

type pg_buffer
  Py_buffer view

    A standard buffer description

  PyObject *consumer

    The object holding the buffer

  pybuffer_releaseproc release_buffer

    A buffer release callback.

PyObject *pgExc_BufferError

  Python exception type raised for any pg_buffer related errors.

PyObject *pgBuffer_AsArrayInterface(Py_buffer *view_p)

  Return a Python array interface object representation of buffer view_p. On failure raise a Python exception and return NULL.

PyObject *pgBuffer_AsArrayStruct(Py_buffer *view_p)

  Return a Python array struct object representation of buffer view_p. On failure raise a Python exception and return NULL.

int pgObject_GetBuffer(PyObject *obj, pg_buffer *pg_view_p, int flags)

  Request a buffer for object obj. Argument flags are PyBUF options. Return the buffer description in pg_view_p. An object may support the Python buffer interface, the NumPy array interface, or the NumPy array struct interface. Return `0` on success, raise a Python exception and return `-1` on failure.

void pgBuffer_Release(Pg_buffer *pg_view_p)

  Release the Pygame pg_view_p buffer.

int pgDict_AsBuffer(Pg_buffer *pg_view_p, PyObject *dict, int flags)

  Write the array interface dictionary buffer description dict into a Pygame buffer description struct pg_view_p. The flags PyBUF options describe the view type requested. Return `0` on success, or raise a Python exception and return `-1` on failure.

void import_pygame_base()

  Import the pygame.base module C API into an extension module. On failure raise a Python exception.

SDL_Window *pg_GetDefaultWindow(void)

  Return the Pygame default SDL window created by a pygame.display.set_mode() call, or NULL.

void pg_SetDefaultWindow(SDL_Window *win)

  Replace the Pygame default window with win. The previous window, if any, is destroyed. Argument win may be NULL. This function is called by pygame.display.set_mode().

pgSurfaceObject *pg_GetDefaultWindowSurface(void)

  Return a borrowed reference to the Pygame default window display surface, or NULL if no default window is open.

void pg_SetDefaultWindowSurface(pgSurfaceObject *screen)

  Replace the Pygame default display surface with object screen. The previous surface object, if any, is invalidated. Argument screen may be NULL. This functions is called by pygame.display.set_mode().

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