QuartzImageDecoder fails on Mac OSX 10.7.3

What steps will reproduce the problem?

I'm running the lastest source from hg+https://pyglet.googlecode.com/hg/ as of 
6 April 2012.

Trying to load a PNG on MacOSX fails--it returns an image with all zero data, 
and will draw a black box. I've tracked it down to the QuartzImageDecoder. If I 
delete that decoder so it uses the pyglet.image.codecs.png.PNGImageDecoder 
instead, it works. Below is a program that illustrates this, and here is the 
output:

% python /tmp/tspyglet.py 
Demonstration of failing PNG decoder on Mac OS 10.7.3
Here are the current image decoders available, and the ones for PNGs:
    get_decoders: [<pyglet.image.codecs.quartz.QuartzImageDecoder object at 0x10b2a9050>, <pyglet.image.codecs.png.PNGImageDecoder object at 0x10b2a9390>, <pyglet.image.codecs.dds.DDSImageDecoder object at 0x1087d3450>, <pyglet.image.codecs.bmp.BMPImageDecoder object at 0x10b2a9490>]
    _decoder_extensions[.png]= [<pyglet.image.codecs.quartz.QuartzImageDecoder object at 0x10b2a9050>, <pyglet.image.codecs.png.PNGImageDecoder object at 0x10b2a9390>]

Load an image using the default decoder, i.e. QuartzImageDecoder. Notice that 
the returned Image
has zeros for it's data.
    raw png data: '\x89PNG\r\n\x1a\n\x00\x00\x00\rIHDR\x00\x00\x01,'
    image data: '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'

Now remove the QuartzImageDecoder so we use the 
pyglet.image.codecs.png.PNGImageDecoder.
It creates good Image.data
    _decoder_extensions[.png]= [<pyglet.image.codecs.png.PNGImageDecoder object at 0x10b2a9390>]
    raw png data: '\x89PNG\r\n\x1a\n\x00\x00\x00\rIHDR\x00\x00\x01,'
    image data: '\xff\xff\xff\x00\xff\xff\xff\x00\xff\xff\xff\x00\xff\xff\xff\x00\xff\xff\xff\x00'

--------------
import pyglet
window = pyglet.window.Window()
filename = ('/tmp/SimpsonsWinston.png')

print '''Demonstration of failing PNG decoder on Mac OS 10.7.3
Here are the current image decoders available, and the ones for PNGs:'''
print '    get_decoders:', pyglet.image.codecs.get_decoders(filename)
print '    _decoder_extensions[.png]=', 
pyglet.image.codecs._decoder_extensions['.png']

print '''
Load an image using the default decoder, i.e. QuartzImageDecoder. Notice that 
the returned Image
has zeros for it's data.'''
image = pyglet.image.load(filename)
print '    raw png data:', repr(open(filename).read()[:20])
print '    image data:', repr(image.data[:20])

print '''
Now remove the QuartzImageDecoder so we use the 
pyglet.image.codecs.png.PNGImageDecoder.
It creates good Image.data'''
del pyglet.image.codecs._decoder_extensions['.png'][0]
print '    _decoder_extensions[.png]=', 
pyglet.image.codecs._decoder_extensions['.png']
image = pyglet.image.load(filename)
print '    raw png data:', repr(open(filename).read()[:20])
print '    image data:', repr(image.data[:20])

# @window.event
# def on_draw():
#     window.clear()
#     image.blit(10, 10)

# pyglet.app.run()

--------------
Here is the output of pyget/info.py:

% python info.py
Python
------------------------------------------------------------------------------
sys.version: 2.7.2 (v2.7.2:8527427914a2, Jun 11 2011, 15:22:34) 
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)]
sys.platform: darwin
sys.maxint: 9223372036854775807
objc.__version__: 2.2
os.getcwd(): 
/Users/winstonw/hg/Electronics/proto/venv/lib/python2.7/site-packages/pyglet

pyglet
------------------------------------------------------------------------------
pyglet.version: 1.2dev
pyglet.__file__: 
/Users/winstonw/hg/Electronics/proto/venv/lib/python2.7/site-packages/pyglet/__i
nit__.pyc
pyglet.options['debug_win32'] = False
pyglet.options['xlib_fullscreen_override_redirect'] = False
pyglet.options['debug_trace_args'] = False
pyglet.options['font'] = ('gdiplus', 'win32')
pyglet.options['debug_gl_trace_args'] = False
pyglet.options['debug_trace'] = False
pyglet.options['debug_gl_trace'] = False
pyglet.options['debug_x11'] = False
pyglet.options['debug_media'] = False
pyglet.options['debug_trace_depth'] = 1
pyglet.options['vsync'] = None
pyglet.options['debug_gl'] = True
pyglet.options['darwin_cocoa'] = True
pyglet.options['debug_trace_flush'] = True
pyglet.options['shadow_window'] = True
pyglet.options['xsync'] = True
pyglet.options['debug_font'] = False
pyglet.options['graphics_vbo'] = True
pyglet.options['debug_lib'] = False
pyglet.options['debug_graphics_batch'] = False
pyglet.options['audio'] = ('directsound', 'pulse', 'openal', 'silent')
pyglet.options['debug_texture'] = False

pyglet.window
------------------------------------------------------------------------------
platform: <pyglet.window.Platform object at 0x101a9cd10>
display: <pyglet.canvas.cocoa.CocoaDisplay object at 0x107cfa9d0>
screens[0]: CocoaScreen(x=0, y=0, width=1920, height=1200)
screens[1]: CocoaScreen(x=1920, y=228, width=1280, height=800)
config['double_buffer'] = 1
config['stereo'] = 0
config['buffer_size'] = 32
config['aux_buffers'] = 0
config['sample_buffers'] = 0
config['samples'] = 0
config['red_size'] = 0
config['green_size'] = 0
config['blue_size'] = 0
config['alpha_size'] = 8
config['depth_size'] = 24
config['stencil_size'] = 0
config['accum_red_size'] = 0
config['accum_green_size'] = 0
config['accum_blue_size'] = 0
config['accum_alpha_size'] = 0
config['major_version'] = None
config['minor_version'] = None
config['forward_compatible'] = None
config['debug'] = None
context: CocoaContext()

window.context._info
------------------------------------------------------------------------------
gl_info.get_version(): 2.1 APPLE-7.18.11
gl_info.get_vendor(): Intel Inc.
gl_info.get_renderer(): Intel HD Graphics 3000 OpenGL Engine
gl_info.get_extensions():
   GL_APPLE_aux_depth_stencil
   GL_APPLE_client_storage
   GL_APPLE_element_array
   GL_APPLE_fence
   GL_APPLE_float_pixels
   GL_APPLE_flush_buffer_range
   GL_APPLE_flush_render
   GL_APPLE_object_purgeable
   GL_APPLE_packed_pixels
   GL_APPLE_pixel_buffer
   GL_APPLE_rgb_422
   GL_APPLE_row_bytes
   GL_APPLE_specular_vector
   GL_APPLE_texture_range
   GL_APPLE_transform_hint
   GL_APPLE_vertex_array_object
   GL_APPLE_vertex_array_range
   GL_APPLE_vertex_point_size
   GL_APPLE_vertex_program_evaluators
   GL_APPLE_ycbcr_422
   GL_ARB_color_buffer_float
   GL_ARB_depth_buffer_float
   GL_ARB_depth_clamp
   GL_ARB_depth_texture
   GL_ARB_draw_buffers
   GL_ARB_draw_elements_base_vertex
   GL_ARB_draw_instanced
   GL_ARB_fragment_program
   GL_ARB_fragment_program_shadow
   GL_ARB_fragment_shader
   GL_ARB_framebuffer_object
   GL_ARB_framebuffer_sRGB
   GL_ARB_half_float_pixel
   GL_ARB_half_float_vertex
   GL_ARB_instanced_arrays
   GL_ARB_multisample
   GL_ARB_multitexture
   GL_ARB_occlusion_query
   GL_ARB_pixel_buffer_object
   GL_ARB_point_parameters
   GL_ARB_point_sprite
   GL_ARB_provoking_vertex
   GL_ARB_seamless_cube_map
   GL_ARB_shader_objects
   GL_ARB_shader_texture_lod
   GL_ARB_shading_language_100
   GL_ARB_shadow
   GL_ARB_sync
   GL_ARB_texture_border_clamp
   GL_ARB_texture_compression
   GL_ARB_texture_compression_rgtc
   GL_ARB_texture_cube_map
   GL_ARB_texture_env_add
   GL_ARB_texture_env_combine
   GL_ARB_texture_env_crossbar
   GL_ARB_texture_env_dot3
   GL_ARB_texture_float
   GL_ARB_texture_mirrored_repeat
   GL_ARB_texture_non_power_of_two
   GL_ARB_texture_rectangle
   GL_ARB_texture_rg
   GL_ARB_transpose_matrix
   GL_ARB_vertex_array_bgra
   GL_ARB_vertex_blend
   GL_ARB_vertex_buffer_object
   GL_ARB_vertex_program
   GL_ARB_vertex_shader
   GL_ARB_window_pos
   GL_ATI_separate_stencil
   GL_ATI_texture_env_combine3
   GL_ATI_texture_float
   GL_EXT_abgr
   GL_EXT_bgra
   GL_EXT_blend_color
   GL_EXT_blend_equation_separate
   GL_EXT_blend_func_separate
   GL_EXT_blend_minmax
   GL_EXT_blend_subtract
   GL_EXT_clip_volume_hint
   GL_EXT_draw_buffers2
   GL_EXT_draw_range_elements
   GL_EXT_fog_coord
   GL_EXT_framebuffer_blit
   GL_EXT_framebuffer_multisample
   GL_EXT_framebuffer_object
   GL_EXT_framebuffer_sRGB
   GL_EXT_geometry_shader4
   GL_EXT_gpu_program_parameters
   GL_EXT_gpu_shader4
   GL_EXT_multi_draw_arrays
   GL_EXT_packed_depth_stencil
   GL_EXT_packed_float
   GL_EXT_provoking_vertex
   GL_EXT_rescale_normal
   GL_EXT_secondary_color
   GL_EXT_separate_specular_color
   GL_EXT_shadow_funcs
   GL_EXT_stencil_two_side
   GL_EXT_stencil_wrap
   GL_EXT_texture_array
   GL_EXT_texture_compression_dxt1
   GL_EXT_texture_compression_s3tc
   GL_EXT_texture_env_add
   GL_EXT_texture_filter_anisotropic
   GL_EXT_texture_integer
   GL_EXT_texture_lod_bias
   GL_EXT_texture_rectangle
   GL_EXT_texture_sRGB
   GL_EXT_texture_sRGB_decode
   GL_EXT_texture_shared_exponent
   GL_EXT_timer_query
   GL_EXT_transform_feedback
   GL_EXT_vertex_array_bgra
   GL_IBM_rasterpos_clip
   GL_NV_blend_square
   GL_NV_conditional_render
   GL_NV_depth_clamp
   GL_NV_fog_distance
   GL_NV_light_max_exponent
   GL_NV_texgen_reflection
   GL_SGIS_generate_mipmap
   GL_SGIS_texture_edge_clamp
   GL_SGIS_texture_lod

pyglet.gl.glu_info
------------------------------------------------------------------------------
glu_info.get_version(): 1.3 MacOSX
glu_info.get_extensions():

pyglet.gl.glx_info
------------------------------------------------------------------------------
GLX not available.

pyglet.media
------------------------------------------------------------------------------
audio driver: <pyglet.media.drivers.openal.OpenALDriver object at 0x1087334d0>

pyglet.media.avbin
------------------------------------------------------------------------------
AVbin not available.

pyglet.media.drivers.openal
------------------------------------------------------------------------------
Library: <CDLL '/System/Library/Frameworks/OpenAL.framework/OpenAL', handle 
105d4a480 at 10873b590>
Version: (1, 1)
Extensions:
   ALC_EXT_CAPTURE
   ALC_ENUMERATION_EXT
   ALC_EXT_MAC_OSX
   ALC_EXT_ASA
   ALC_EXT_ASA_DISTORTION
   ALC_EXT_ASA_ROGER_BEEP

pyglet.input.wintab
------------------------------------------------------------------------------
WinTab not available.
Original issue reported on code.google.com by winstonw...@gmail.com on 6 Apr 2012 at 6:44
google-code-export / pyglet

QuartzImageDecoder fails on Mac OSX 10.7.3 #569
