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The Chosen Half
05-01-2015, 10:15 AM
Hello,

I need some help creating a context.
I wrote a program on my PC (win7) and now I'm trying to port it for my lap top(win8.1 nvidia and on board intel graphics), but it isn't working.
I don't know which version of OpenGL exactly I was using on the PC, since none of the glGet functions gave me anything, though I specified that I wanted version 3.2 core:

bool OpenGLContext::create_context(HWND hwnd, HWND hwnd2, HINSTANCE hInstance) {
get_pixel_format(hInstance);

this->hwnd = hwnd;
this->hwnd2 = hwnd2;
hdc = GetDC(hwnd);
hdc2 = GetDC(hwnd2);

PIXELFORMATDESCRIPTOR pfd;
DescribePixelFormat(hdc, nPixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
SetPixelFormat(hdc, nPixelFormat, &pfd);
SetPixelFormat(hdc2, nPixelFormat, &pfd);

const int attribList[] =
{
WGL_CONTEXT_MAJOR_VERSION_ARB, 3,
WGL_CONTEXT_MINOR_VERSION_ARB, 3,
WGL_CONTEXT_CORE_PROFILE_BIT_ARB, 1,
0
};

if (wglewIsSupported("WGL_ARB_create_context") == 1) {
hrc = wglCreateContextAttribsARB(hdc, NULL, attribList);
if (hrc != NULL) {
return 0;
}
error = 0x3001;
}
else {
error = 0x3000;
}

destroy();
return 1;
}

And on the lap top I got a null pointer for hrc, then I removed the attribute list and it worked... kind of... it always returned 0x00020000 but supposedly it was a success, until the shaders tried to compile and failed due to:

0(3) : error C7548: 'layout(location)' requires "#extension GL_ARB_explicit_attrib_location : enable" before use
0(3) : error C0000: ... or #extension GL_ARB_separate_shader_objects : enable
0(3) : error C0000: ... or #version 330
0(4) : error C7548: 'layout(location)' requires "#extension GL_ARB_explicit_attrib_location : enable" before use
0(4) : error C0000: ... or #extension GL_ARB_separate_shader_objects : enable
0(4) : error C0000: ... or #version 330

so I changed it to glsl 330, which then worked.

Then I included the attribute list again, and it didn't work, even with major and minor version set to 3.3.
I removed core profile from the attribute list and it worked(Important note: I then included this, but set the flag to 0, still didn't work). But I want the core profile and I want to know why it doesn't work.
Can anyone help me? I can post as much code as needed.

mbentrup
05-02-2015, 01:35 AM
You seem to be using GLEW, note that current GLEW doesn't work properly with OpenGL core contexts.

The Chosen Half
05-02-2015, 01:55 AM
Oh, I was unaware. Do you think it's best to load functions manually?
I would like to learn to do so either way, do you know of any good articles on this?

Also, I have found the problem, I wasn't using attribList correctly. The third line should be:
"WGL_CONTEXT_PROFILE_MASK_ARB, WGL_CONTEXT_CORE_PROFILE_BIT_ARB,",
not:
"WGL_CONTEXT_CORE_PROFILE_BIT_ARB, 1,".

Now the problem is that my PC loads version 3.2.something and my lap top loads 3.2.0 NVIDIA 350.somethingelse.
What exactly does that mean? Is 3.2.something an AMD version of gl implementation (since my PC has AMD) and 3.2.0 NVIDIA 350.somethingelse a Nvidia implementation?

And on my lap top I get the same error compiling shaders as before. So my guess would be the Nvidia drivers don't load the extensions that AMD does?

Thank you for your help.

Dark Photon
05-02-2015, 05:24 PM
Oh, I was unaware. Do you think it's best to load functions manually?
I would like to learn to do so either way, do you know of any good articles on this?

* Load OpenGL Functions (OpenGL Wiki) (https://www.opengl.org/wiki/Load_OpenGL_Functions)


Now the problem is that my PC loads version 3.2.something ... (Is 3.2.something an AMD version of gl implementation (since my PC has AMD))

and my lap top loads 3.2.0 NVIDIA 350.somethingelse ...

NVidia and ATI build their OpenGL GL_VERSION strings differently.

On your laptop (NVidia drivers), OpenGL 3.2 support is advertised, and the NVidia driver version is 350.something else.

On your PC (AMD drivers), AMD's advertising OpenGL 3.2, and the .something in their case is some kind of AMD driver build number, version, or something.

For more GL_VERSION examples, see:

* http://feedback.wildfiregames.com/report/opengl/feature/GL_VERSION


And on my lap top I get the same error compiling shaders as before. So my guess would be the Nvidia drivers don't load the extensions that AMD does?

Have you checked for GL errors and tried to nail down the problem? Describe what you've already tried.

Try creating a default context (wglCreateContext) and report what GL_VERSION and GL_EXTENSIONS show with that?

Post the shader error you're now getting (and which context version you're getting it in).

The Chosen Half
05-09-2015, 06:42 AM
Apologies for the late reply, but I don't have much time during the week, and thank you for the help.

So the problem isn't in the OpenGL version, it's GLSL.
GLSL version 150 works on the PC, but not on my laptop where I get errors:

Shader info log:
0(3) : error C7548: 'layout(location)' requires "#extension GL_ARB_explicit_attrib_location : enable" before use
0(3) : error C0000: ... or #extension GL_ARB_separate_shader_objects : enable
0(3) : error C0000: ... or #version 330
0(4) : error C7548: 'layout(location)' requires "#extension GL_ARB_explicit_attrib_location : enable" before use
0(4) : error C0000: ... or #extension GL_ARB_separate_shader_objects : enable
0(4) : error C0000: ... or #version 330

I changed the version of the GLSL files to 330 and it works, though it works with both OpenGL 3.2 and 3.3.
The question is why it's different on my two machines and how GLSL versions are managed, I thought GLSL 330 was for OpenGL 3.3+.

Now for the GL_EXTENSIONS and GL_VERSION. These are some interesting results.
I wrapped them as code since I don't see any spoilers available here.

Laptop:
Default context:

4.5.0 NVIDIA 350.12
GL_AMD_multi_draw_indirect
GL_AMD_seamless_cubemap_per_texture
GL_ARB_arrays_of_arrays
GL_ARB_base_instance
GL_ARB_bindless_texture
GL_ARB_blend_func_extended
GL_ARB_buffer_storage
GL_ARB_clear_buffer_object
GL_ARB_clear_texture
GL_ARB_clip_control
GL_ARB_color_buffer_float
GL_ARB_compatibility
GL_ARB_compressed_texture_pixel_storage
GL_ARB_conservative_depth
GL_ARB_compute_shader
GL_ARB_compute_variable_group_size
GL_ARB_conditional_render_inverted
GL_ARB_copy_buffer
GL_ARB_copy_image
GL_ARB_cull_distance
GL_ARB_debug_output
GL_ARB_depth_buffer_float
GL_ARB_depth_clamp
GL_ARB_depth_texture
GL_ARB_derivative_control
GL_ARB_direct_state_access
GL_ARB_draw_buffers
GL_ARB_draw_buffers_blend
GL_ARB_draw_indirect
GL_ARB_draw_elements_base_vertex
GL_ARB_draw_instanced
GL_ARB_enhanced_layouts
GL_ARB_ES2_compatibility
GL_ARB_ES3_compatibility
GL_ARB_ES3_1_compatibility
GL_ARB_explicit_attrib_location
GL_ARB_explicit_uniform_location
GL_ARB_fragment_coord_conventions
GL_ARB_fragment_layer_viewport
GL_ARB_fragment_program
GL_ARB_fragment_program_shadow
GL_ARB_fragment_shader
GL_ARB_framebuffer_no_attachments
GL_ARB_framebuffer_object
GL_ARB_framebuffer_sRGB
GL_ARB_geometry_shader4
GL_ARB_get_program_binary
GL_ARB_get_texture_sub_image
GL_ARB_gpu_shader5
GL_ARB_gpu_shader_fp64
GL_ARB_half_float_pixel
GL_ARB_half_float_vertex
GL_ARB_imaging
GL_ARB_indirect_parameters
GL_ARB_instanced_arrays
GL_ARB_internalformat_query
GL_ARB_internalformat_query2
GL_NV_internalformat_sample_query
GL_ARB_invalidate_subdata
GL_ARB_map_buffer_alignment
GL_ARB_map_buffer_range
GL_ARB_multi_bind
GL_ARB_multi_draw_indirect
GL_ARB_multisample
GL_ARB_multitexture
GL_ARB_occlusion_query
GL_ARB_occlusion_query2
GL_ARB_pipeline_statistics_query
GL_ARB_pixel_buffer_object
GL_ARB_point_parameters
GL_ARB_point_sprite
GL_ARB_program_interface_query
GL_ARB_provoking_vertex
GL_ARB_robust_buffer_access_behavior
GL_ARB_robustness
GL_ARB_sample_shading
GL_ARB_sampler_objects
GL_ARB_seamless_cube_map
GL_ARB_seamless_cubemap_per_texture
GL_ARB_separate_shader_objects
GL_ARB_shader_atomic_counters
GL_ARB_shader_bit_encoding
GL_ARB_shader_draw_parameters
GL_ARB_shader_group_vote
GL_ARB_shader_image_load_store
GL_ARB_shader_image_size
GL_ARB_shader_objects
GL_ARB_shader_precision
GL_ARB_query_buffer_object
GL_ARB_shader_storage_buffer_object
GL_ARB_shader_subroutine
GL_ARB_shader_texture_image_samples
GL_ARB_shader_texture_lod
GL_ARB_shading_language_100
GL_ARB_shading_language_420pack
GL_ARB_shading_language_include
GL_ARB_shading_language_packing
GL_ARB_shadow
GL_ARB_sparse_buffer
GL_ARB_sparse_texture
GL_ARB_stencil_texturing
GL_ARB_sync
GL_ARB_tessellation_shader
GL_ARB_texture_barrier
GL_ARB_texture_border_clamp
GL_ARB_texture_buffer_object
GL_ARB_texture_buffer_object_rgb32
GL_ARB_texture_buffer_range
GL_ARB_texture_compression
GL_ARB_texture_compression_bptc
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_mirror_clamp_to_edge
GL_ARB_texture_mirrored_repeat
GL_ARB_texture_multisample
GL_ARB_texture_non_power_of_two
GL_ARB_texture_query_levels
GL_ARB_texture_query_lod
GL_ARB_texture_rectangle
GL_ARB_texture_rg
GL_ARB_texture_rgb10_a2ui
GL_ARB_texture_stencil8
GL_ARB_texture_storage
GL_ARB_texture_storage_multisample
GL_ARB_texture_swizzle
GL_ARB_texture_view
GL_ARB_timer_query
GL_ARB_transform_feedback2
GL_ARB_transform_feedback3
GL_ARB_transform_feedback_instanced
GL_ARB_transform_feedback_overflow_query
GL_ARB_transpose_matrix
GL_ARB_uniform_buffer_object
GL_ARB_vertex_array_bgra
GL_ARB_vertex_array_object
GL_ARB_vertex_attrib_64bit
GL_ARB_vertex_attrib_binding
GL_ARB_vertex_buffer_object
GL_ARB_vertex_program
GL_ARB_vertex_shader
GL_ARB_vertex_type_10f_11f_11f_rev
GL_ARB_vertex_type_2_10_10_10_rev
GL_ARB_viewport_array
GL_ARB_window_pos
GL_ATI_draw_buffers
GL_ATI_texture_float
GL_ATI_texture_mirror_once
GL_S3_s3tc
GL_EXT_texture_env_add
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_Cg_shader
GL_EXT_depth_bounds_test
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_EXTX_framebuffer_mixed_formats
GL_EXT_framebuffer_multisample_blit_scaled
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_packed_pixels
GL_EXT_pixel_buffer_object
GL_EXT_point_parameters
GL_EXT_polygon_offset_clamp
GL_EXT_provoking_vertex
GL_EXT_rescale_normal
GL_EXT_secondary_color
GL_EXT_separate_shader_objects
GL_EXT_separate_specular_color
GL_EXT_shader_image_load_store
GL_EXT_shader_integer_mix
GL_EXT_shadow_funcs
GL_EXT_stencil_two_side
GL_EXT_stencil_wrap
GL_EXT_texture3D
GL_EXT_texture_array
GL_EXT_texture_buffer_object
GL_EXT_texture_compression_dxt1
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_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_shared_exponent
GL_EXT_texture_sRGB
GL_EXT_texture_sRGB_decode
GL_EXT_texture_storage
GL_EXT_texture_swizzle
GL_EXT_timer_query
GL_EXT_transform_feedback2
GL_EXT_vertex_array
GL_EXT_vertex_array_bgra
GL_EXT_vertex_attrib_64bit
GL_EXT_import_sync_object
GL_IBM_rasterpos_clip
GL_IBM_texture_mirrored_repeat
GL_KHR_context_flush_control
GL_KHR_debug
GL_KHR_robust_buffer_access_behavior
GL_KHR_robustness
GL_KTX_buffer_region
GL_NV_bindless_multi_draw_indirect
GL_NV_bindless_multi_draw_indirect_count
GL_NV_bindless_texture
GL_NV_blend_equation_advanced
GL_NV_blend_square
GL_NV_command_list
GL_NV_compute_program5
GL_NV_conditional_render
GL_NV_copy_depth_to_color
GL_NV_copy_image
GL_NV_depth_buffer_float
GL_NV_depth_clamp
GL_NV_draw_texture
GL_NV_ES1_1_compatibility
GL_NV_ES3_1_compatibility
GL_NV_explicit_multisample
GL_NV_fence
GL_NV_float_buffer
GL_NV_fog_distance
GL_NV_fragment_program
GL_NV_fragment_program_option
GL_NV_fragment_program2
GL_NV_framebuffer_multisample_coverage
GL_NV_geometry_shader4
GL_NV_gpu_program4
GL_NV_gpu_program4_1
GL_NV_gpu_program5
GL_NV_gpu_program5_mem_extended
GL_NV_gpu_program_fp64
GL_NV_gpu_shader5
GL_NV_half_float
GL_NV_light_max_exponent
GL_NV_multisample_coverage
GL_NV_multisample_filter_hint
GL_NV_occlusion_query
GL_NV_packed_depth_stencil
GL_NV_parameter_buffer_object
GL_NV_parameter_buffer_object2
GL_NV_path_rendering
GL_NV_pixel_data_range
GL_NV_point_sprite
GL_NV_primitive_restart
GL_NV_register_combiners
GL_NV_register_combiners2
GL_NV_shader_atomic_counters
GL_NV_shader_atomic_float
GL_NV_shader_atomic_int64
GL_NV_shader_buffer_load
GL_NV_shader_storage_buffer_object
GL_NV_texgen_reflection
GL_NV_texture_barrier
GL_NV_texture_compression_vtc
GL_NV_texture_env_combine4
GL_NV_texture_multisample
GL_NV_texture_rectangle
GL_NV_texture_shader
GL_NV_texture_shader2
GL_NV_texture_shader3
GL_NV_transform_feedback
GL_NV_transform_feedback2
GL_NV_uniform_buffer_unified_memory
GL_NV_vertex_array_range
GL_NV_vertex_array_range2
GL_NV_vertex_attrib_integer_64bit
GL_NV_vertex_buffer_unified_memory
GL_NV_vertex_program
GL_NV_vertex_program1_1
GL_NV_vertex_program2
GL_NV_vertex_program2_option
GL_NV_vertex_program3
GL_NVX_conditional_render
GL_NVX_gpu_memory_info
GL_NVX_nvenc_interop
GL_NV_shader_thread_group
GL_NV_shader_thread_shuffle
GL_KHR_blend_equation_advanced
GL_SGIS_generate_mipmap
GL_SGIS_texture_lod
GL_SGIX_depth_texture
GL_SGIX_shadow
GL_SUN_slice_accum
GL_WIN_swap_hint
WGL_EXT_swap_control


OpenGL 3.2 context:

3.2.0 NVIDIA 350.12
GL_AMD_multi_draw_indirect
GL_AMD_seamless_cubemap_per_texture
GL_ARB_arrays_of_arrays
GL_ARB_base_instance
GL_ARB_bindless_texture
GL_ARB_blend_func_extended
GL_ARB_buffer_storage
GL_ARB_clear_buffer_object
GL_ARB_clear_texture
GL_ARB_clip_control
GL_ARB_color_buffer_float
GL_ARB_compressed_texture_pixel_storage
GL_ARB_conservative_depth
GL_ARB_compute_shader
GL_ARB_compute_variable_group_size
GL_ARB_conditional_render_inverted
GL_ARB_copy_buffer
GL_ARB_copy_image
GL_ARB_cull_distance
GL_ARB_debug_output
GL_ARB_depth_buffer_float
GL_ARB_depth_clamp
GL_ARB_depth_texture
GL_ARB_derivative_control
GL_ARB_direct_state_access
GL_ARB_draw_buffers
GL_ARB_draw_buffers_blend
GL_ARB_draw_indirect
GL_ARB_draw_elements_base_vertex
GL_ARB_draw_instanced
GL_ARB_enhanced_layouts
GL_ARB_ES2_compatibility
GL_ARB_ES3_compatibility
GL_ARB_ES3_1_compatibility
GL_ARB_explicit_attrib_location
GL_ARB_explicit_uniform_location
GL_ARB_fragment_coord_conventions
GL_ARB_fragment_layer_viewport
GL_ARB_fragment_program
GL_ARB_fragment_program_shadow
GL_ARB_fragment_shader
GL_ARB_framebuffer_no_attachments
GL_ARB_framebuffer_object
GL_ARB_framebuffer_sRGB
GL_ARB_geometry_shader4
GL_ARB_get_program_binary
GL_ARB_get_texture_sub_image
GL_ARB_gpu_shader5
GL_ARB_gpu_shader_fp64
GL_ARB_half_float_pixel
GL_ARB_half_float_vertex
GL_ARB_imaging
GL_ARB_indirect_parameters
GL_ARB_instanced_arrays
GL_ARB_internalformat_query
GL_ARB_internalformat_query2
GL_NV_internalformat_sample_query
GL_ARB_invalidate_subdata
GL_ARB_map_buffer_alignment
GL_ARB_map_buffer_range
GL_ARB_multi_bind
GL_ARB_multi_draw_indirect
GL_ARB_multisample
GL_ARB_multitexture
GL_ARB_occlusion_query
GL_ARB_occlusion_query2
GL_ARB_pipeline_statistics_query
GL_ARB_pixel_buffer_object
GL_ARB_point_parameters
GL_ARB_point_sprite
GL_ARB_program_interface_query
GL_ARB_provoking_vertex
GL_ARB_robust_buffer_access_behavior
GL_ARB_robustness
GL_ARB_sample_shading
GL_ARB_sampler_objects
GL_ARB_seamless_cube_map
GL_ARB_seamless_cubemap_per_texture
GL_ARB_separate_shader_objects
GL_ARB_shader_atomic_counters
GL_ARB_shader_bit_encoding
GL_ARB_shader_draw_parameters
GL_ARB_shader_group_vote
GL_ARB_shader_image_load_store
GL_ARB_shader_image_size
GL_ARB_shader_objects
GL_ARB_shader_precision
GL_ARB_query_buffer_object
GL_ARB_shader_storage_buffer_object
GL_ARB_shader_subroutine
GL_ARB_shader_texture_image_samples
GL_ARB_shader_texture_lod
GL_ARB_shading_language_100
GL_ARB_shading_language_420pack
GL_ARB_shading_language_include
GL_ARB_shading_language_packing
GL_ARB_shadow
GL_ARB_sparse_buffer
GL_ARB_sparse_texture
GL_ARB_stencil_texturing
GL_ARB_sync
GL_ARB_tessellation_shader
GL_ARB_texture_barrier
GL_ARB_texture_border_clamp
GL_ARB_texture_buffer_object
GL_ARB_texture_buffer_object_rgb32
GL_ARB_texture_buffer_range
GL_ARB_texture_compression
GL_ARB_texture_compression_bptc
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_mirror_clamp_to_edge
GL_ARB_texture_mirrored_repeat
GL_ARB_texture_multisample
GL_ARB_texture_non_power_of_two
GL_ARB_texture_query_levels
GL_ARB_texture_query_lod
GL_ARB_texture_rectangle
GL_ARB_texture_rg
GL_ARB_texture_rgb10_a2ui
GL_ARB_texture_stencil8
GL_ARB_texture_storage
GL_ARB_texture_storage_multisample
GL_ARB_texture_swizzle
GL_ARB_texture_view
GL_ARB_timer_query
GL_ARB_transform_feedback2
GL_ARB_transform_feedback3
GL_ARB_transform_feedback_instanced
GL_ARB_transform_feedback_overflow_query
GL_ARB_transpose_matrix
GL_ARB_uniform_buffer_object
GL_ARB_vertex_array_bgra
GL_ARB_vertex_array_object
GL_ARB_vertex_attrib_64bit
GL_ARB_vertex_attrib_binding
GL_ARB_vertex_buffer_object
GL_ARB_vertex_program
GL_ARB_vertex_shader
GL_ARB_vertex_type_10f_11f_11f_rev
GL_ARB_vertex_type_2_10_10_10_rev
GL_ARB_viewport_array
GL_ARB_window_pos
GL_ATI_draw_buffers
GL_ATI_texture_float
GL_ATI_texture_mirror_once
GL_S3_s3tc
GL_EXT_texture_env_add
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_Cg_shader
GL_EXT_depth_bounds_test
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_EXTX_framebuffer_mixed_formats
GL_EXT_framebuffer_multisample_blit_scaled
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_packed_pixels
GL_EXT_pixel_buffer_object
GL_EXT_point_parameters
GL_EXT_polygon_offset_clamp
GL_EXT_provoking_vertex
GL_EXT_rescale_normal
GL_EXT_secondary_color
GL_EXT_separate_shader_objects
GL_EXT_separate_specular_color
GL_EXT_shader_image_load_store
GL_EXT_shader_integer_mix
GL_EXT_shadow_funcs
GL_EXT_stencil_two_side
GL_EXT_stencil_wrap
GL_EXT_texture3D
GL_EXT_texture_array
GL_EXT_texture_buffer_object
GL_EXT_texture_compression_dxt1
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_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_shared_exponent
GL_EXT_texture_sRGB
GL_EXT_texture_sRGB_decode
GL_EXT_texture_storage
GL_EXT_texture_swizzle
GL_EXT_timer_query
GL_EXT_transform_feedback2
GL_EXT_vertex_array
GL_EXT_vertex_array_bgra
GL_EXT_vertex_attrib_64bit
GL_EXT_import_sync_object
GL_IBM_rasterpos_clip
GL_IBM_texture_mirrored_repeat
GL_KHR_context_flush_control
GL_KHR_debug
GL_KHR_robust_buffer_access_behavior
GL_KHR_robustness
GL_KTX_buffer_region
GL_NV_bindless_multi_draw_indirect
GL_NV_bindless_multi_draw_indirect_count
GL_NV_bindless_texture
GL_NV_blend_equation_advanced
GL_NV_blend_square
GL_NV_command_list
GL_NV_compute_program5
GL_NV_conditional_render
GL_NV_copy_depth_to_color
GL_NV_copy_image
GL_NV_depth_buffer_float
GL_NV_depth_clamp
GL_NV_draw_texture
GL_NV_ES1_1_compatibility
GL_NV_ES3_1_compatibility
GL_NV_explicit_multisample
GL_NV_fence
GL_NV_float_buffer
GL_NV_fog_distance
GL_NV_fragment_program
GL_NV_fragment_program_option
GL_NV_fragment_program2
GL_NV_framebuffer_multisample_coverage
GL_NV_geometry_shader4
GL_NV_gpu_program4
GL_NV_gpu_program4_1
GL_NV_gpu_program5
GL_NV_gpu_program5_mem_extended
GL_NV_gpu_program_fp64
GL_NV_gpu_shader5
GL_NV_half_float
GL_NV_light_max_exponent
GL_NV_multisample_coverage
GL_NV_multisample_filter_hint
GL_NV_occlusion_query
GL_NV_packed_depth_stencil
GL_NV_parameter_buffer_object
GL_NV_parameter_buffer_object2
GL_NV_path_rendering
GL_NV_pixel_data_range
GL_NV_point_sprite
GL_NV_primitive_restart
GL_NV_register_combiners
GL_NV_register_combiners2
GL_NV_shader_atomic_counters
GL_NV_shader_atomic_float
GL_NV_shader_atomic_int64
GL_NV_shader_buffer_load
GL_NV_shader_storage_buffer_object
GL_NV_texgen_reflection
GL_NV_texture_barrier
GL_NV_texture_compression_vtc
GL_NV_texture_env_combine4
GL_NV_texture_multisample
GL_NV_texture_rectangle
GL_NV_texture_shader
GL_NV_texture_shader2
GL_NV_texture_shader3
GL_NV_transform_feedback
GL_NV_transform_feedback2
GL_NV_uniform_buffer_unified_memory
GL_NV_vertex_array_range
GL_NV_vertex_array_range2
GL_NV_vertex_attrib_integer_64bit
GL_NV_vertex_buffer_unified_memory
GL_NV_vertex_program
GL_NV_vertex_program1_1
GL_NV_vertex_program2
GL_NV_vertex_program2_option
GL_NV_vertex_program3
GL_NVX_conditional_render
GL_NVX_gpu_memory_info
GL_NVX_nvenc_interop
GL_NV_shader_thread_group
GL_NV_shader_thread_shuffle
GL_KHR_blend_equation_advanced
GL_SGIS_generate_mipmap
GL_SGIS_texture_lod
GL_SGIX_depth_texture
GL_SGIX_shadow
GL_SUN_slice_accum
GL_WIN_swap_hint
WGL_EXT_swap_control


OpenGL 3.3 context:

3.3.0 NVIDIA 350.12
GL_AMD_multi_draw_indirect
GL_AMD_seamless_cubemap_per_texture
GL_ARB_arrays_of_arrays
GL_ARB_base_instance
GL_ARB_bindless_texture
GL_ARB_blend_func_extended
GL_ARB_buffer_storage
GL_ARB_clear_buffer_object
GL_ARB_clear_texture
GL_ARB_clip_control
GL_ARB_color_buffer_float
GL_ARB_compressed_texture_pixel_storage
GL_ARB_conservative_depth
GL_ARB_compute_shader
GL_ARB_compute_variable_group_size
GL_ARB_conditional_render_inverted
GL_ARB_copy_buffer
GL_ARB_copy_image
GL_ARB_cull_distance
GL_ARB_debug_output
GL_ARB_depth_buffer_float
GL_ARB_depth_clamp
GL_ARB_depth_texture
GL_ARB_derivative_control
GL_ARB_direct_state_access
GL_ARB_draw_buffers
GL_ARB_draw_buffers_blend
GL_ARB_draw_indirect
GL_ARB_draw_elements_base_vertex
GL_ARB_draw_instanced
GL_ARB_enhanced_layouts
GL_ARB_ES2_compatibility
GL_ARB_ES3_compatibility
GL_ARB_ES3_1_compatibility
GL_ARB_explicit_attrib_location
GL_ARB_explicit_uniform_location
GL_ARB_fragment_coord_conventions
GL_ARB_fragment_layer_viewport
GL_ARB_fragment_program
GL_ARB_fragment_program_shadow
GL_ARB_fragment_shader
GL_ARB_framebuffer_no_attachments
GL_ARB_framebuffer_object
GL_ARB_framebuffer_sRGB
GL_ARB_geometry_shader4
GL_ARB_get_program_binary
GL_ARB_get_texture_sub_image
GL_ARB_gpu_shader5
GL_ARB_gpu_shader_fp64
GL_ARB_half_float_pixel
GL_ARB_half_float_vertex
GL_ARB_imaging
GL_ARB_indirect_parameters
GL_ARB_instanced_arrays
GL_ARB_internalformat_query
GL_ARB_internalformat_query2
GL_NV_internalformat_sample_query
GL_ARB_invalidate_subdata
GL_ARB_map_buffer_alignment
GL_ARB_map_buffer_range
GL_ARB_multi_bind
GL_ARB_multi_draw_indirect
GL_ARB_multisample
GL_ARB_multitexture
GL_ARB_occlusion_query
GL_ARB_occlusion_query2
GL_ARB_pipeline_statistics_query
GL_ARB_pixel_buffer_object
GL_ARB_point_parameters
GL_ARB_point_sprite
GL_ARB_program_interface_query
GL_ARB_provoking_vertex
GL_ARB_robust_buffer_access_behavior
GL_ARB_robustness
GL_ARB_sample_shading
GL_ARB_sampler_objects
GL_ARB_seamless_cube_map
GL_ARB_seamless_cubemap_per_texture
GL_ARB_separate_shader_objects
GL_ARB_shader_atomic_counters
GL_ARB_shader_bit_encoding
GL_ARB_shader_draw_parameters
GL_ARB_shader_group_vote
GL_ARB_shader_image_load_store
GL_ARB_shader_image_size
GL_ARB_shader_objects
GL_ARB_shader_precision
GL_ARB_query_buffer_object
GL_ARB_shader_storage_buffer_object
GL_ARB_shader_subroutine
GL_ARB_shader_texture_image_samples
GL_ARB_shader_texture_lod
GL_ARB_shading_language_100
GL_ARB_shading_language_420pack
GL_ARB_shading_language_include
GL_ARB_shading_language_packing
GL_ARB_shadow
GL_ARB_sparse_buffer
GL_ARB_sparse_texture
GL_ARB_stencil_texturing
GL_ARB_sync
GL_ARB_tessellation_shader
GL_ARB_texture_barrier
GL_ARB_texture_border_clamp
GL_ARB_texture_buffer_object
GL_ARB_texture_buffer_object_rgb32
GL_ARB_texture_buffer_range
GL_ARB_texture_compression
GL_ARB_texture_compression_bptc
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_mirror_clamp_to_edge
GL_ARB_texture_mirrored_repeat
GL_ARB_texture_multisample
GL_ARB_texture_non_power_of_two
GL_ARB_texture_query_levels
GL_ARB_texture_query_lod
GL_ARB_texture_rectangle
GL_ARB_texture_rg
GL_ARB_texture_rgb10_a2ui
GL_ARB_texture_stencil8
GL_ARB_texture_storage
GL_ARB_texture_storage_multisample
GL_ARB_texture_swizzle
GL_ARB_texture_view
GL_ARB_timer_query
GL_ARB_transform_feedback2
GL_ARB_transform_feedback3
GL_ARB_transform_feedback_instanced
GL_ARB_transform_feedback_overflow_query
GL_ARB_transpose_matrix
GL_ARB_uniform_buffer_object
GL_ARB_vertex_array_bgra
GL_ARB_vertex_array_object
GL_ARB_vertex_attrib_64bit
GL_ARB_vertex_attrib_binding
GL_ARB_vertex_buffer_object
GL_ARB_vertex_program
GL_ARB_vertex_shader
GL_ARB_vertex_type_10f_11f_11f_rev
GL_ARB_vertex_type_2_10_10_10_rev
GL_ARB_viewport_array
GL_ARB_window_pos
GL_ATI_draw_buffers
GL_ATI_texture_float
GL_ATI_texture_mirror_once
GL_S3_s3tc
GL_EXT_texture_env_add
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_Cg_shader
GL_EXT_depth_bounds_test
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_EXTX_framebuffer_mixed_formats
GL_EXT_framebuffer_multisample_blit_scaled
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_packed_pixels
GL_EXT_pixel_buffer_object
GL_EXT_point_parameters
GL_EXT_polygon_offset_clamp
GL_EXT_provoking_vertex
GL_EXT_rescale_normal
GL_EXT_secondary_color
GL_EXT_separate_shader_objects
GL_EXT_separate_specular_color
GL_EXT_shader_image_load_store
GL_EXT_shader_integer_mix
GL_EXT_shadow_funcs
GL_EXT_stencil_two_side
GL_EXT_stencil_wrap
GL_EXT_texture3D
GL_EXT_texture_array
GL_EXT_texture_buffer_object
GL_EXT_texture_compression_dxt1
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_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_shared_exponent
GL_EXT_texture_sRGB
GL_EXT_texture_sRGB_decode
GL_EXT_texture_storage
GL_EXT_texture_swizzle
GL_EXT_timer_query
GL_EXT_transform_feedback2
GL_EXT_vertex_array
GL_EXT_vertex_array_bgra
GL_EXT_vertex_attrib_64bit
GL_EXT_import_sync_object
GL_IBM_rasterpos_clip
GL_IBM_texture_mirrored_repeat
GL_KHR_context_flush_control
GL_KHR_debug
GL_KHR_robust_buffer_access_behavior
GL_KHR_robustness
GL_KTX_buffer_region
GL_NV_bindless_multi_draw_indirect
GL_NV_bindless_multi_draw_indirect_count
GL_NV_bindless_texture
GL_NV_blend_equation_advanced
GL_NV_blend_square
GL_NV_command_list
GL_NV_compute_program5
GL_NV_conditional_render
GL_NV_copy_depth_to_color
GL_NV_copy_image
GL_NV_depth_buffer_float
GL_NV_depth_clamp
GL_NV_draw_texture
GL_NV_ES1_1_compatibility
GL_NV_ES3_1_compatibility
GL_NV_explicit_multisample
GL_NV_fence
GL_NV_float_buffer
GL_NV_fog_distance
GL_NV_fragment_program
GL_NV_fragment_program_option
GL_NV_fragment_program2
GL_NV_framebuffer_multisample_coverage
GL_NV_geometry_shader4
GL_NV_gpu_program4
GL_NV_gpu_program4_1
GL_NV_gpu_program5
GL_NV_gpu_program5_mem_extended
GL_NV_gpu_program_fp64
GL_NV_gpu_shader5
GL_NV_half_float
GL_NV_light_max_exponent
GL_NV_multisample_coverage
GL_NV_multisample_filter_hint
GL_NV_occlusion_query
GL_NV_packed_depth_stencil
GL_NV_parameter_buffer_object
GL_NV_parameter_buffer_object2
GL_NV_path_rendering
GL_NV_pixel_data_range
GL_NV_point_sprite
GL_NV_primitive_restart
GL_NV_register_combiners
GL_NV_register_combiners2
GL_NV_shader_atomic_counters
GL_NV_shader_atomic_float
GL_NV_shader_atomic_int64
GL_NV_shader_buffer_load
GL_NV_shader_storage_buffer_object
GL_NV_texgen_reflection
GL_NV_texture_barrier
GL_NV_texture_compression_vtc
GL_NV_texture_env_combine4
GL_NV_texture_multisample
GL_NV_texture_rectangle
GL_NV_texture_shader
GL_NV_texture_shader2
GL_NV_texture_shader3
GL_NV_transform_feedback
GL_NV_transform_feedback2
GL_NV_uniform_buffer_unified_memory
GL_NV_vertex_array_range
GL_NV_vertex_array_range2
GL_NV_vertex_attrib_integer_64bit
GL_NV_vertex_buffer_unified_memory
GL_NV_vertex_program
GL_NV_vertex_program1_1
GL_NV_vertex_program2
GL_NV_vertex_program2_option
GL_NV_vertex_program3
GL_NVX_conditional_render
GL_NVX_gpu_memory_info
GL_NVX_nvenc_interop
GL_NV_shader_thread_group
GL_NV_shader_thread_shuffle
GL_KHR_blend_equation_advanced
GL_SGIS_generate_mipmap
GL_SGIS_texture_lod
GL_SGIX_depth_texture
GL_SGIX_shadow
GL_SUN_slice_accum
GL_WIN_swap_hint
WGL_EXT_swap_control

As far as I can see gl 3.2 and 3.3 provide the same 315 extensions and the default 4.5 context provides one additional extension GL_ARB_compatibility.


PC:
Default context:

4.2.11554 Compatibility Profile Context
GL_AMDX_debug_output
GL_AMD_blend_minmax_factor
GL_AMD_conservative_depth
GL_AMD_debug_output
GL_AMD_depth_clamp_separate
GL_AMD_draw_buffers_blend
GL_AMD_multi_draw_indirect
GL_AMD_name_gen_delete
GL_AMD_performance_monitor
GL_AMD_pinned_memory
GL_AMD_sample_positions
GL_AMD_seamless_cubemap_per_texture
GL_AMD_shader_stencil_export
GL_AMD_shader_trace
GL_AMD_stencil_operation_extended
GL_AMD_texture_cube_map_array
GL_AMD_texture_texture4
GL_AMD_transform_feedback3_lines_triangles
GL_ARB_ES2_compatibility
GL_ARB_base_instance
GL_ARB_blend_func_extended
GL_ARB_color_buffer_float
GL_ARB_compressed_texture_pixel_storage
GL_ARB_conservative_depth
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_get_program_binary
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_internalformat_query
GL_ARB_map_buffer_alignment
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_separate_shader_objects
GL_ARB_shader_atomic_counters
GL_ARB_shader_bit_encoding
GL_ARB_shader_image_load_store
GL_ARB_shader_objects
GL_ARB_shader_precision
GL_ARB_shader_stencil_export
GL_ARB_shader_subroutine
GL_ARB_shader_texture_lod
GL_ARB_shading_language_100
GL_ARB_shading_language_420pack
GL_ARB_shading_language_packing
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_buffer_object_rgb32
GL_ARB_texture_compression
GL_ARB_texture_compression_bptc
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_rectangle
GL_ARB_texture_rg
GL_ARB_texture_rgb10_a2ui
GL_ARB_texture_snorm
GL_ARB_texture_storage
GL_ARB_timer_query
GL_ARB_transform_feedback2
GL_ARB_transform_feedback3
GL_ARB_transform_feedback_instanced
GL_ARB_transpose_matrix
GL_ARB_uniform_buffer_object
GL_ARB_vertex_array_bgra
GL_ARB_vertex_array_object
GL_ARB_vertex_attrib_64bit
GL_ARB_vertex_buffer_object
GL_ARB_vertex_program
GL_ARB_vertex_shader
GL_ARB_vertex_type_2_10_10_10_rev
GL_ARB_viewport_array
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_depth_bounds_test
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_shader_image_load_store
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_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_storage
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_copy_image
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


OpenGL 3.2 context:

3.2.11554 Core Profile Context
GL_AMDX_debug_output
GL_AMD_blend_minmax_factor
GL_AMD_conservative_depth
GL_AMD_debug_output
GL_AMD_depth_clamp_separate
GL_AMD_draw_buffers_blend
GL_AMD_multi_draw_indirect
GL_AMD_name_gen_delete
GL_AMD_performance_monitor
GL_AMD_pinned_memory
GL_AMD_sample_positions
GL_AMD_seamless_cubemap_per_texture
GL_AMD_shader_stencil_export
GL_AMD_shader_trace
GL_AMD_stencil_operation_extended
GL_AMD_texture_cube_map_array
GL_AMD_texture_texture4
GL_AMD_transform_feedback3_lines_triangles
GL_ARB_ES2_compatibility
GL_ARB_base_instance
GL_ARB_blend_func_extended
GL_ARB_color_buffer_float
GL_ARB_compatibility
GL_ARB_compressed_texture_pixel_storage
GL_ARB_conservative_depth
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_get_program_binary
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_internalformat_query
GL_ARB_map_buffer_alignment
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_separate_shader_objects
GL_ARB_shader_atomic_counters
GL_ARB_shader_bit_encoding
GL_ARB_shader_image_load_store
GL_ARB_shader_objects
GL_ARB_shader_precision
GL_ARB_shader_stencil_export
GL_ARB_shader_subroutine
GL_ARB_shader_texture_lod
GL_ARB_shading_language_100
GL_ARB_shading_language_420pack
GL_ARB_shading_language_packing
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_buffer_object_rgb32
GL_ARB_texture_compression
GL_ARB_texture_compression_bptc
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_rectangle
GL_ARB_texture_rg
GL_ARB_texture_rgb10_a2ui
GL_ARB_texture_snorm
GL_ARB_texture_storage
GL_ARB_timer_query
GL_ARB_transform_feedback2
GL_ARB_transform_feedback3
GL_ARB_transform_feedback_instanced
GL_ARB_transpose_matrix
GL_ARB_uniform_buffer_object
GL_ARB_vertex_array_bgra
GL_ARB_vertex_array_object
GL_ARB_vertex_attrib_64bit
GL_ARB_vertex_buffer_object
GL_ARB_vertex_program
GL_ARB_vertex_shader
GL_ARB_vertex_type_2_10_10_10_rev
GL_ARB_viewport_array
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_depth_bounds_test
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_shader_image_load_store
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_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_storage
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_copy_image
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


OpenGL 3.3 context:

3.3.11554 Core Profile Context
GL_AMDX_debug_output
GL_AMD_blend_minmax_factor
GL_AMD_conservative_depth
GL_AMD_debug_output
GL_AMD_depth_clamp_separate
GL_AMD_draw_buffers_blend
GL_AMD_multi_draw_indirect
GL_AMD_name_gen_delete
GL_AMD_performance_monitor
GL_AMD_pinned_memory
GL_AMD_sample_positions
GL_AMD_seamless_cubemap_per_texture
GL_AMD_shader_stencil_export
GL_AMD_shader_trace
GL_AMD_stencil_operation_extended
GL_AMD_texture_cube_map_array
GL_AMD_texture_texture4
GL_AMD_transform_feedback3_lines_triangles
GL_ARB_ES2_compatibility
GL_ARB_base_instance
GL_ARB_blend_func_extended
GL_ARB_color_buffer_float
GL_ARB_compatibility
GL_ARB_compressed_texture_pixel_storage
GL_ARB_conservative_depth
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_get_program_binary
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_internalformat_query
GL_ARB_map_buffer_alignment
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_separate_shader_objects
GL_ARB_shader_atomic_counters
GL_ARB_shader_bit_encoding
GL_ARB_shader_image_load_store
GL_ARB_shader_objects
GL_ARB_shader_precision
GL_ARB_shader_stencil_export
GL_ARB_shader_subroutine
GL_ARB_shader_texture_lod
GL_ARB_shading_language_100
GL_ARB_shading_language_420pack
GL_ARB_shading_language_packing
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_buffer_object_rgb32
GL_ARB_texture_compression
GL_ARB_texture_compression_bptc
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_rectangle
GL_ARB_texture_rg
GL_ARB_texture_rgb10_a2ui
GL_ARB_texture_snorm
GL_ARB_texture_storage
GL_ARB_timer_query
GL_ARB_transform_feedback2
GL_ARB_transform_feedback3
GL_ARB_transform_feedback_instanced
GL_ARB_transpose_matrix
GL_ARB_uniform_buffer_object
GL_ARB_vertex_array_bgra
GL_ARB_vertex_array_object
GL_ARB_vertex_attrib_64bit
GL_ARB_vertex_buffer_object
GL_ARB_vertex_program
GL_ARB_vertex_shader
GL_ARB_vertex_type_2_10_10_10_rev
GL_ARB_viewport_array
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_depth_bounds_test
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_shader_image_load_store
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_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_storage
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_copy_image
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


And in comparison of these three it would appear the default context loads 211 extensions and the 3.3 and 3.2 contexts load an additional one GL_ARB_compatibility.

All 6 instances include both GL_ARB_separate_shader_objects and GL_ARB_explicit_attrib_location.



Anyway, it seems all it wants me to do is to explicitly enable some extensions.

"#extension GL_ARB_explicit_attrib_location : enable"
I haven't seen this before. What is it's purpose?

I have a few additional questions now...
What does glew do when I call glewInit()?
When does it load extensions?
Do some extensions get loaded automatically, without glew?
Does glew also load default OpenGL functions?
If glew loads GL_ARB_explicit_attrib_location, what does it mean to enable it? I also used other extensions and there was no need for that. (WGL_ARB_pixel_format, WGL_ARB_create_context)


Also, here is the whole context creation code:

bool OpenGLContext::create_context(HWND hwnd, HWND hwnd2, HINSTANCE hInstance) {
get_pixel_format(hInstance);

this->hwnd = hwnd;
this->hwnd2 = hwnd2;
hdc = GetDC(hwnd);
hdc2 = GetDC(hwnd2);

PIXELFORMATDESCRIPTOR pfd;
DescribePixelFormat(hdc, nPixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
SetPixelFormat(hdc, nPixelFormat, &pfd);
SetPixelFormat(hdc2, nPixelFormat, &pfd);

const int attribList[] =
{
WGL_CONTEXT_MAJOR_VERSION_ARB, 3,
WGL_CONTEXT_MINOR_VERSION_ARB, 3,
WGL_CONTEXT_PROFILE_MASK_ARB, WGL_CONTEXT_CORE_PROFILE_BIT_ARB,
0
};

if (wglewIsSupported("WGL_ARB_create_context") == 1) {
hrc = wglCreateContextAttribsARB(hdc, NULL, attribList);
if (hrc != NULL) {
return 0;
}
error = 0x3001;
}
else {
error = 0x3000;
}

destroy();
return 1;
}

bool OpenGLContext::get_pixel_format(HINSTANCE hInstance) {
WNDCLASSEX wndClass;
HGLRC hrc = NULL;
HDC hdc = NULL;
HWND hwnd = NULL;

wndClass.cbSize = sizeof(WNDCLASSEX);
wndClass.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
wndClass.lpfnWndProc = DefWindowProc;
wndClass.cbClsExtra = 0;
wndClass.cbWndExtra = 0;
wndClass.hInstance = hInstance;
wndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
wndClass.hbrBackground = NULL;
wndClass.lpszMenuName = NULL;
wndClass.lpszClassName = L"dummy";
wndClass.hIconSm = LoadIcon(NULL, IDI_WINLOGO);

if (RegisterClassEx(&wndClass)) {
hwnd = CreateWindowEx(
NULL,
L"dummy",
L"Dummy.",
WS_OVERLAPPEDWINDOW,
0, 0,
0, 0,
NULL,
NULL,
hInstance,
NULL);

if (hwnd) {
hdc = GetDC(hwnd);

PIXELFORMATDESCRIPTOR pfd =
{
sizeof(PIXELFORMATDESCRIPTOR),
1,
PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER,
PFD_TYPE_RGBA,
24,
0, 0, 0, 0, 0, 0,
0,
0,
0,
0, 0, 0, 0,
0,
0,
0,
PFD_MAIN_PLANE,
0,
0, 0, 0
};

nPixelFormat = ChoosePixelFormat(hdc, &pfd);
if (nPixelFormat != 0 && SetPixelFormat(hdc, nPixelFormat, &pfd)) {
hrc = wglCreateContext(hdc);
wglMakeCurrent(hdc, hrc);

if (glewInit() == GLEW_OK) {
int attribList[] =
{
WGL_CONTEXT_MAJOR_VERSION_ARB, 3,
WGL_CONTEXT_MINOR_VERSION_ARB, 3,
WGL_CONTEXT_PROFILE_MASK_ARB, WGL_CONTEXT_CORE_PROFILE_BIT_ARB,
0
};

if (wglewIsSupported("WGL_ARB_pixel_format") == 1) {
UINT bla;
wglChoosePixelFormatARB(hdc, attribList, NULL, 1, &nPixelFormat, &bla);
}
else {
wglMakeCurrent(NULL, NULL);
wglDeleteContext(hrc);
ReleaseDC(hwnd, hdc);
DestroyWindow(hwnd);
error = 0x8005;
return 1;
}
}
else {
wglMakeCurrent(NULL, NULL);
wglDeleteContext(hrc);
ReleaseDC(hwnd, hdc);
DestroyWindow(hwnd);
error = 0x8004;
return 1;
}
}
else {
ReleaseDC(hwnd, hdc);
DestroyWindow(hwnd);
error = 0x8003;
return 1;
}
}
else {
error = 0x8002;
return 1;
}
}
else {
error = 0x8001;
return 1;
}

wglMakeCurrent(NULL, NULL);
wglDeleteContext(hrc);
ReleaseDC(hwnd, hdc);
DestroyWindow(hwnd);
UnregisterClass(L"wndClass", hInstance);

return 0;
}

Dark Photon
05-09-2015, 05:05 PM
Laptop:
Default context:

4.5.0 NVIDIA 350.12
...

PC:
Default context:

4.2.11554 Compatibility Profile Context
...

And in comparison of these three it would appear the default context loads 211 extensions and the 3.3 and 3.2 contexts load an additional one GL_ARB_compatibility.

All 6 instances include both GL_ARB_separate_shader_objects and GL_ARB_explicit_attrib_location.

Ok, so both your PC GL drivers and laptop GL drivers easily support OpenGL 3.3+ functionality, including the extensions you mention here.


...on my laptop where I get errors:

Shader info log:
0(3) : error C7548: 'layout(location)' requires "#extension GL_ARB_explicit_attrib_location : enable" before use
0(3) : error C0000: ... or #extension GL_ARB_separate_shader_objects : enable
0(3) : error C0000: ... or #version 330
0(4) : error C7548: 'layout(location)' requires "#extension GL_ARB_explicit_attrib_location : enable" before use
0(4) : error C0000: ... or #extension GL_ARB_separate_shader_objects : enable
0(4) : error C0000: ... or #version 330

I changed the version of the GLSL files to 330 and it works, though it works with both OpenGL 3.2 and 3.3.

The question is why it's different on my two machines and how GLSL versions are managed, I thought GLSL 330 was for OpenGL 3.3+.

Why what is different? The errors? The version of GLSL it says it requires?

Re GLSL version management, yes. After GLSL 1.5 (#version 150), the ARB decided for simplicity to just sync the OpenGL and GLSL versions. So #version 330 = GLSL 3.3 which corresponds to OpenGL 3.3. Prior to that, you just have to look because they don't map trivially to OpenGL versions (e.g. GLSL 1.5 was released with OpenGL 3.2). To see the correlation, look here:

* https://www.opengl.org/registry/



"#extension GL_ARB_explicit_attrib_location : enable"
I haven't seen this before. What is it's purpose?

This allows you to selectively enable available extension functionality in GLSL. It's like #version, except that #version pulls in all the new capabilities advertised in that major GLSL release. #extension allows you to be specific.

Generally you'd use #version if you can, but fall back to #extension if you don't want to require support for a newer GLSL version that supports what you want to do but you still want to use some new feature.

As to the explicit attribute location functionality you're mentioning here (layout(location)), that went into the core GLSL spec in 3.30 so you don't need any #extension to enable this functionality. #version 330 (or greater) will do.


I have a few additional questions now...
What does glew do when I call glewInit()?
When does it load extensions?

You can check the GLEW docs or download the sourcecode and look yourself:

* http://glew.sourceforge.net/basic.html


Do some extensions get loaded automatically, without glew?

Not unless you're using some other extension loader or doing it yourself.

Note that on some GL drivers and platforms, you don't have to physically load the extension function pointers -- you can just link with them. But the portable way is to query the extension pointers and use them (either yourself or using some extension loader like GLEW).


Does glew also load default OpenGL functions?

You mean functions defined in the OpenGL spec? Don't know -- haven't used GLEW. But I'd bet all OpenGL spec APIs are available either directly or through GLEW.


If glew loads GL_ARB_explicit_attrib_location, what does it mean to enable it? I also used other extensions and there was no need for that. (WGL_ARB_pixel_format, WGL_ARB_create_context)

There are two main pieces to extensions: the C API, and the GLSL API. The entry points for the C API are what requires special loading. The GLSL API is built-in, fed via strings through C API entrypoints, so it doesn't require any special loading.

The Chosen Half
05-10-2015, 02:35 AM
Why what is different? The errors? The version of GLSL it says it requires?
Why does the same version of GLSL (1.50) cause errors on my laptop and not on my PC?


Re GLSL version management, yes. After GLSL 1.5 (#version 150), the ARB decided for simplicity to just sync the OpenGL and GLSL versions. So #version 330 = GLSL 3.3 which corresponds to OpenGL 3.3. Prior to that, you just have to look because they don't map trivially to OpenGL versions (e.g. GLSL 1.5 was released with OpenGL 3.2). To see the correlation, look here:

* https://www.opengl.org/registry/
Which is what is odd, GLSL 330 seems to work with OpenGL 3.2.

Alfonse Reinheart
05-10-2015, 09:55 AM
Why does the same version of GLSL (1.50) cause errors on my laptop and not on my PC?

Because your PC implementation is, for whatever reason, not doing proper GLSL version checking.