Problem with multiple calls to pyglet.graphics.vertex_list_indexed

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Run the attached code.
2. Click on the window. Notice the white box became red.
3. Change the flag to False.
4. Run the program again.
5. Click the window. Notice the green box.

In both cases, both the red and the green boxes should have appeared!

Python
------------------------------------------------------------------------------
sys.version: 2.6.4 (r264:75706, Jan 22 2010, 16:41:54) [MSC v.1500 32 bit 
(Intel)]
sys.platform: win32
os.getcwd(): C:\Users\t

pyglet
------------------------------------------------------------------------------
pyglet.version: 1.1.4
pyglet.__file__: C:\Python26\lib\site-packages\pyglet\__init__.pyc
pyglet.options['debug_trace_depth'] = 1
pyglet.options['font'] = ('gdiplus', 'win32')
pyglet.options['xsync'] = True
pyglet.options['debug_trace_flush'] = True
pyglet.options['debug_win32'] = False
pyglet.options['debug_gl_trace'] = False
pyglet.options['debug_x11'] = False
pyglet.options['shadow_window'] = True
pyglet.options['debug_font'] = False
pyglet.options['debug_media'] = False
pyglet.options['debug_trace'] = False
pyglet.options['debug_lib'] = False
pyglet.options['graphics_vbo'] = True
pyglet.options['vsync'] = None
pyglet.options['debug_trace_args'] = False
pyglet.options['debug_gl'] = True
pyglet.options['debug_graphics_batch'] = False
pyglet.options['audio'] = ('directsound', 'openal', 'alsa', 'silent')
pyglet.options['debug_texture'] = False
pyglet.options['debug_gl_trace_args'] = False

pyglet.window
------------------------------------------------------------------------------
platform: <pyglet.window.win32.Win32Platform object at 0x0250F570>
display: <pyglet.window.win32.Win32Display object at 0x0250F4F0>
screens[0]: Win32Screen(x=0, y=0, width=1920, height=1200)
config['double_buffer'] = True
config['stereo'] = False
config['buffer_size'] = 32
config['aux_buffers'] = 4
config['sample_buffers'] = 0
config['samples'] = 0
config['red_size'] = 8
config['green_size'] = 8
config['blue_size'] = 8
config['alpha_size'] = 8
config['depth_size'] = 24
config['stencil_size'] = 8
config['accum_red_size'] = 0
config['accum_green_size'] = 0
config['accum_blue_size'] = 0
config['accum_alpha_size'] = 0
context: Win32Context()

pyglet.gl.gl_info
------------------------------------------------------------------------------
gl_info.get_version(): 4.0.10317 Compatibility Profile Context
gl_info.get_vendor(): ATI Technologies Inc.
gl_info.get_renderer(): ATI Radeon HD 5800 Series 
gl_info.get_extensions():
   GL_AMDX_debug_output
   GL_AMDX_vertex_shader_tessellator
   GL_AMD_conservative_depth
   GL_AMD_debug_output
   GL_AMD_draw_buffers_blend
   GL_AMD_name_gen_delete
   GL_AMD_performance_monitor
   GL_AMD_sample_positions
   GL_AMD_seamless_cubemap_per_texture
   GL_AMD_shader_stencil_export
   GL_AMD_texture_cube_map_array
   GL_AMD_texture_texture4
   GL_AMD_transform_feedback3_lines_triangles
   GL_AMD_vertex_shader_tessellator
   GL_ARB_blend_func_extended
   GL_ARB_color_buffer_float
   GL_ARB_copy_buffer
   GL_ARB_depth_buffer_float
   GL_ARB_depth_clamp
   GL_ARB_depth_texture
   GL_ARB_draw_buffers
   GL_ARB_draw_buffers_blend
   GL_ARB_draw_elements_base_vertex
   GL_ARB_draw_indirect
   GL_ARB_draw_instanced
   GL_ARB_explicit_attrib_location
   GL_ARB_fragment_coord_conventions
   GL_ARB_fragment_program
   GL_ARB_fragment_program_shadow
   GL_ARB_fragment_shader
   GL_ARB_framebuffer_object
   GL_ARB_framebuffer_sRGB
   GL_ARB_geometry_shader4
   GL_ARB_gpu_shader5
   GL_ARB_gpu_shader_fp64
   GL_ARB_half_float_pixel
   GL_ARB_half_float_vertex
   GL_ARB_imaging
   GL_ARB_instanced_arrays
   GL_ARB_map_buffer_range
   GL_ARB_multisample
   GL_ARB_multitexture
   GL_ARB_occlusion_query
   GL_ARB_occlusion_query2
   GL_ARB_pixel_buffer_object
   GL_ARB_point_parameters
   GL_ARB_point_sprite
   GL_ARB_provoking_vertex
   GL_ARB_sample_shading
   GL_ARB_sampler_objects
   GL_ARB_seamless_cube_map
   GL_ARB_shader_atomic_counters
   GL_ARB_shader_bit_encoding
   GL_ARB_shader_objects
   GL_ARB_shader_stencil_export
   GL_ARB_shader_subroutine
   GL_ARB_shader_texture_lod
   GL_ARB_shading_language_100
   GL_ARB_shadow
   GL_ARB_shadow_ambient
   GL_ARB_sync
   GL_ARB_tessellation_shader
   GL_ARB_texture_border_clamp
   GL_ARB_texture_buffer_object
   GL_ARB_texture_compression
   GL_ARB_texture_compression_rgtc
   GL_ARB_texture_cube_map
   GL_ARB_texture_cube_map_array
   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_gather
   GL_ARB_texture_mirrored_repeat
   GL_ARB_texture_multisample
   GL_ARB_texture_non_power_of_two
   GL_ARB_texture_query_lod
   GL_ARB_texture_rectangle
   GL_ARB_texture_rg
   GL_ARB_texture_rgb10_a2ui
   GL_ARB_texture_snorm
   GL_ARB_timer_query
   GL_ARB_transform_feedback2
   GL_ARB_transform_feedback3
   GL_ARB_transpose_matrix
   GL_ARB_uniform_buffer_object
   GL_ARB_vertex_array_bgra
   GL_ARB_vertex_array_object
   GL_ARB_vertex_buffer_object
   GL_ARB_vertex_program
   GL_ARB_vertex_shader
   GL_ARB_vertex_type_2_10_10_10_rev
   GL_ARB_window_pos
   GL_ATI_draw_buffers
   GL_ATI_envmap_bumpmap
   GL_ATI_fragment_shader
   GL_ATI_meminfo
   GL_ATI_separate_stencil
   GL_ATI_texture_compression_3dc
   GL_ATI_texture_env_combine3
   GL_ATI_texture_float
   GL_ATI_texture_mirror_once
   GL_EXT_abgr
   GL_EXT_bgra
   GL_EXT_bindable_uniform
   GL_EXT_blend_color
   GL_EXT_blend_equation_separate
   GL_EXT_blend_func_separate
   GL_EXT_blend_minmax
   GL_EXT_blend_subtract
   GL_EXT_compiled_vertex_array
   GL_EXT_copy_buffer
   GL_EXT_copy_texture
   GL_EXT_direct_state_access
   GL_EXT_draw_buffers2
   GL_EXT_draw_instanced
   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_histogram
   GL_EXT_multi_draw_arrays
   GL_EXT_packed_depth_stencil
   GL_EXT_packed_float
   GL_EXT_packed_pixels
   GL_EXT_pixel_buffer_object
   GL_EXT_point_parameters
   GL_EXT_provoking_vertex
   GL_EXT_rescale_normal
   GL_EXT_secondary_color
   GL_EXT_separate_specular_color
   GL_EXT_shadow_funcs
   GL_EXT_stencil_wrap
   GL_EXT_subtexture
   GL_EXT_texgen_reflection
   GL_EXT_texture3D
   GL_EXT_texture_array
   GL_EXT_texture_buffer_object
   GL_EXT_texture_buffer_object_rgb32
   GL_EXT_texture_compression_bptc
   GL_EXT_texture_compression_latc
   GL_EXT_texture_compression_rgtc
   GL_EXT_texture_compression_s3tc
   GL_EXT_texture_cube_map
   GL_EXT_texture_edge_clamp
   GL_EXT_texture_env_add
   GL_EXT_texture_env_combine
   GL_EXT_texture_env_dot3
   GL_EXT_texture_filter_anisotropic
   GL_EXT_texture_integer
   GL_EXT_texture_lod
   GL_EXT_texture_lod_bias
   GL_EXT_texture_mirror_clamp
   GL_EXT_texture_object
   GL_EXT_texture_rectangle
   GL_EXT_texture_sRGB
   GL_EXT_texture_shared_exponent
   GL_EXT_texture_snorm
   GL_EXT_texture_swizzle
   GL_EXT_timer_query
   GL_EXT_transform_feedback
   GL_EXT_vertex_array
   GL_EXT_vertex_array_bgra
   GL_EXT_vertex_attrib_64bit
   GL_IBM_texture_mirrored_repeat
   GL_KTX_buffer_region
   GL_NV_blend_square
   GL_NV_conditional_render
   GL_NV_copy_depth_to_color
   GL_NV_explicit_multisample
   GL_NV_float_buffer
   GL_NV_half_float
   GL_NV_primitive_restart
   GL_NV_texgen_reflection
   GL_NV_texture_barrier
   GL_SGIS_generate_mipmap
   GL_SGIS_texture_edge_clamp
   GL_SGIS_texture_lod
   GL_SUN_multi_draw_arrays
   GL_WIN_swap_hint
   WGL_EXT_swap_control

pyglet.gl.glu_info
------------------------------------------------------------------------------
glu_info.get_version(): 1.2.2.0 Microsoft Corporation
glu_info.get_extensions():
   GL_EXT_bgra

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

pyglet.media
------------------------------------------------------------------------------
driver: pyglet.media.drivers.directsound

pyglet.media.avbin
------------------------------------------------------------------------------
Library: <CDLL 'avbin', handle 6e440000 at 2655650>
AVbin version: 5
FFmpeg revision: 13661

pyglet.media.drivers.openal
------------------------------------------------------------------------------
Library: <CDLL 'openal32', handle 3ff0000 at 2663170>
Version: (1, 1)
Extensions:

Any additional info (platform/language/hardware) that may be relevant?

Original issue reported on code.google.com by sugoib...@gmail.com on 21 Jan 2011 at 10:08

Attachments:

• bug.py

[GoogleCodeExporter]

I should note the it seems like a known issue.
The indices property of the IndexedVertexList is NOT exactly as the one given 
in the factory method, but rather offset by a value.
This however nullifies the usefulness of write-access to the indices property.
Moreover, the resize method also turns useless since it's the added indices 
can't easily be added to the resized area.

A solution might be adding the offset in the set method of the indices property.
As for performance, a slower approach such as this to writing is better than 
not having this feature at all.
Such a solution allows for indexed_vertex_buffer / add_indexed to incrementally 
write the indices instead of pre-calculating all of them before the call.

Without simple write-access, indices can't be written incrementally 
Without resizing, a new buffer must be allocated every time.

Original comment by sugoib...@gmail.com on 22 Jan 2011 at 10:59