[pygame] new buffer code from Lenard

[René Dudfield <renesd@xxxxxxxxx>]

Hellos,

Lenard made some new buffer improvements to pygame.  If anyone has time to test it with their apps that would be cool.  Just installing it from source, and seeing if your app still works ok.  Especially if you use any of the buffer related code directly.

https://bitbucket.org/pygame/pygame/


Here's the notes from WHATSNEW...

    Add full Python new buffer protocol support to Pygame 1.9.2. In addition
    Python level array interface support is added to several Pygame objects
    and function. This changeset marks the end of a series of commits,
    starting with revision 98e3a61592c1 on September 8, 2012.

    Affected Pygame buffer exporting objects are BufferProxy, Surface
    (through method get_buffer), Sound, PixelArray, and Color. Affected
    importers are Sound, freetype.Font, BufferProxy, and the
    pixelcopy module functions (array_to_surface, surface_to_array, map_array,
    and make_surface).

    Internally, Pygame has been rewritten to use the C Py_buffer to represent
    external array objects. For Python 2.5 and earlier, which do not support
    the new buffer protocol, Py_buffer is defined in pygame.h. The details
    of translating between Py_buffer and the array interface are now found
    in only on C file, base.c. Consequently, the base module exports several new
    Pygame C api functions and a new exception: PgBuffer_AsArrayInterface,
    PgBuffer_AsArrayStruct, PgObject_GetBuffer, PgBuffer_Release,
    PgDict_AsBuffer, and PgExc_BufferError. These api additions also reduce
    the amount of conditional compilation code required to support Python
    versions which lack the new buffer protocol.

    Finally, for proper testing, additions are made to the unit test framework.
    A new extension module, pygame.newbuffer, adds new classes for importing
    and exporting the new buffer interface at the Python level. It is built
    conditionally. The new pygame.tests.test_utils.buftools Python module
    implements the high level classes used in the actual unit tests. Also,
    a new class in pygame.tests.test_utils.arrinter exports a C level
    array interface from the Python level.