wxWidgets-3.2.9 breaks wxGLCanvasEGL when using Mesa llvmpipe (Issue #26410)
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Paul Ripke
Apr 27, 2026, 12:04:20 AM (yesterday) Apr 27
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stixpjr created an issue (wxWidgets/wxWidgets#26410)Description
Bug description:
I maintain the pkgsrc port of prusa-slicer. After upgrading to wxWidgets-3.2.9, the EGL canvas fails to be created. Due to $REASONS I'm currently relying on software rendering (Mesa llvmpipe). A simple patch to allow calling eglCreatePlatformWindowSurface on EGL 1.4 brings back working behaviour.
--- glegl.cpp.orig 2025-12-08 09:59:42.000000000 +1100
+++ glegl.cpp 2026-04-27 13:51:53.927602321 +1000
@@ -569,7 +569,7 @@
void* window,
EGLAttrib const* attrib_list);
- if ( gs_eglMajor > 1 || (gs_eglMajor == 1 && gs_eglMinor >= 5) )
+ if ( gs_eglMajor > 1 || (gs_eglMajor == 1 && gs_eglMinor >= 4) )
{
// EGL 1.5 or later: use eglCreatePlatformWindowSurface() which must be
// available.
Expected vs observed behaviour:
Expect no regression in behaviour from 3.2.8.
Platform and version information
- wxWidgets version you use: 3.2.9
- wxWidgets port you use: wxGTK
- OS and its version: NetBSD 10
- GTK version: 3.24.51nb5
- Which GDK backend is used: X11
- Desktop environment: i3
eglCreatePlatformWindowSurface is present in libEGL.so:
objdump -T /usr/X11R7/lib/libEGL.so | grep WindowSurface
0000000000016b7c g DF .text 0000000000000146 eglCreateWindowSurface
00000000000186fe g DF .text 000000000000017b eglCreatePlatformWindowSurface
glxinfo:
name of display: :0
display: :0 screen: 0
direct rendering: Yes
server glx vendor string: SGI
server glx version string: 1.4
server glx extensions:
GLX_ARB_context_flush_control, GLX_ARB_create_context,
GLX_ARB_create_context_no_error, GLX_ARB_create_context_profile,
GLX_ARB_fbconfig_float, GLX_ARB_framebuffer_sRGB, GLX_ARB_multisample,
GLX_EXT_create_context_es2_profile, GLX_EXT_create_context_es_profile,
GLX_EXT_fbconfig_packed_float, GLX_EXT_framebuffer_sRGB,
GLX_EXT_get_drawable_type, GLX_EXT_libglvnd, GLX_EXT_no_config_context,
GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info, GLX_EXT_visual_rating,
GLX_MESA_copy_sub_buffer, GLX_OML_swap_method, GLX_SGIS_multisample,
GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group,
GLX_SGI_make_current_read
client glx vendor string: Mesa Project and SGI
client glx version string: 1.4
client glx extensions:
GLX_ARB_context_flush_control, GLX_ARB_create_context,
GLX_ARB_create_context_no_error, GLX_ARB_create_context_profile,
GLX_ARB_create_context_robustness, GLX_ARB_fbconfig_float,
GLX_ARB_framebuffer_sRGB, GLX_ARB_get_proc_address, GLX_ARB_multisample,
GLX_EXT_buffer_age, GLX_EXT_create_context_es2_profile,
GLX_EXT_create_context_es_profile, GLX_EXT_fbconfig_packed_float,
GLX_EXT_framebuffer_sRGB, GLX_EXT_import_context,
GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info, GLX_EXT_visual_rating,
GLX_INTEL_swap_event, GLX_MESA_copy_sub_buffer,
GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer,
GLX_MESA_swap_control, GLX_OML_swap_method, GLX_OML_sync_control,
GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer,
GLX_SGIX_visual_select_group, GLX_SGI_make_current_read,
GLX_SGI_swap_control, GLX_SGI_video_sync
GLX version: 1.4
GLX extensions:
GLX_ARB_context_flush_control, GLX_ARB_create_context,
GLX_ARB_create_context_profile, GLX_ARB_fbconfig_float,
GLX_ARB_framebuffer_sRGB, GLX_ARB_get_proc_address, GLX_ARB_multisample,
GLX_EXT_create_context_es2_profile, GLX_EXT_create_context_es_profile,
GLX_EXT_fbconfig_packed_float, GLX_EXT_framebuffer_sRGB,
GLX_EXT_import_context, GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info,
GLX_EXT_visual_rating, GLX_MESA_copy_sub_buffer, GLX_MESA_query_renderer,
GLX_OML_swap_method, GLX_SGIS_multisample, GLX_SGIX_fbconfig,
GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group, GLX_SGI_make_current_read
Extended renderer info (GLX_MESA_query_renderer):
Vendor: VMware, Inc. (0xffffffff)
Device: llvmpipe (LLVM 13.0, 128 bits) (0xffffffff)
Version: 19.1.17
Accelerated: no
Video memory: 64629MB
Unified memory: no
Preferred profile: core (0x1)
Max core profile version: 3.3
Max compat profile version: 3.1
Max GLES1 profile version: 1.1
Max GLES[23] profile version: 3.0
OpenGL vendor string: VMware, Inc.
OpenGL renderer string: llvmpipe (LLVM 13.0, 128 bits)
OpenGL core profile version string: 3.3 (Core Profile) Mesa 19.1.17
OpenGL core profile shading language version string: 3.30
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
GL_AMD_conservative_depth, GL_AMD_draw_buffers_blend,
GL_AMD_gpu_shader_int64, GL_AMD_multi_draw_indirect,
GL_AMD_seamless_cubemap_per_texture, GL_AMD_shader_stencil_export,
GL_AMD_shader_trinary_minmax, GL_AMD_texture_texture4,
GL_AMD_vertex_shader_layer, GL_AMD_vertex_shader_viewport_index,
GL_ANGLE_texture_compression_dxt3, GL_ANGLE_texture_compression_dxt5,
GL_ARB_ES2_compatibility, GL_ARB_ES3_compatibility,
GL_ARB_arrays_of_arrays, GL_ARB_base_instance, GL_ARB_blend_func_extended,
GL_ARB_buffer_storage, GL_ARB_clear_buffer_object, GL_ARB_clear_texture,
GL_ARB_clip_control, GL_ARB_compressed_texture_pixel_storage,
GL_ARB_conditional_render_inverted, GL_ARB_conservative_depth,
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_direct_state_access, 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_enhanced_layouts,
GL_ARB_explicit_attrib_location, GL_ARB_explicit_uniform_location,
GL_ARB_fragment_coord_conventions, GL_ARB_fragment_layer_viewport,
GL_ARB_fragment_shader, GL_ARB_framebuffer_object,
GL_ARB_framebuffer_sRGB, GL_ARB_get_program_binary,
GL_ARB_get_texture_sub_image, GL_ARB_gpu_shader_fp64,
GL_ARB_gpu_shader_int64, GL_ARB_half_float_pixel,
GL_ARB_half_float_vertex, GL_ARB_instanced_arrays,
GL_ARB_internalformat_query, GL_ARB_internalformat_query2,
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_occlusion_query2, GL_ARB_parallel_shader_compile,
GL_ARB_pipeline_statistics_query, GL_ARB_pixel_buffer_object,
GL_ARB_point_sprite, GL_ARB_polygon_offset_clamp,
GL_ARB_program_interface_query, GL_ARB_provoking_vertex,
GL_ARB_robustness, GL_ARB_sampler_objects, GL_ARB_seamless_cube_map,
GL_ARB_seamless_cubemap_per_texture, GL_ARB_separate_shader_objects,
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_420pack,
GL_ARB_shading_language_packing, GL_ARB_stencil_texturing, GL_ARB_sync,
GL_ARB_texture_buffer_object, GL_ARB_texture_buffer_object_rgb32,
GL_ARB_texture_buffer_range, GL_ARB_texture_compression_bptc,
GL_ARB_texture_compression_rgtc, GL_ARB_texture_cube_map_array,
GL_ARB_texture_float, GL_ARB_texture_gather,
GL_ARB_texture_mirror_clamp_to_edge, 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_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_shader,
GL_ARB_vertex_type_10f_11f_11f_rev, GL_ARB_vertex_type_2_10_10_10_rev,
GL_ARB_viewport_array, GL_ATI_blend_equation_separate,
GL_ATI_texture_float, GL_ATI_texture_mirror_once, GL_EXT_abgr,
GL_EXT_blend_equation_separate, GL_EXT_draw_buffers2,
GL_EXT_draw_instanced, GL_EXT_framebuffer_blit,
GL_EXT_framebuffer_multisample, GL_EXT_framebuffer_multisample_blit_scaled,
GL_EXT_framebuffer_object, GL_EXT_framebuffer_sRGB,
GL_EXT_packed_depth_stencil, GL_EXT_packed_float,
GL_EXT_pixel_buffer_object, GL_EXT_polygon_offset_clamp,
GL_EXT_provoking_vertex, GL_EXT_shader_integer_mix, GL_EXT_texture_array,
GL_EXT_texture_compression_dxt1, GL_EXT_texture_compression_rgtc,
GL_EXT_texture_compression_s3tc, GL_EXT_texture_integer,
GL_EXT_texture_mirror_clamp, GL_EXT_texture_sRGB, GL_EXT_texture_sRGB_R8,
GL_EXT_texture_sRGB_decode, 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_bgra,
GL_EXT_vertex_attrib_64bit, GL_IBM_multimode_draw_arrays,
GL_KHR_context_flush_control, GL_KHR_debug, GL_KHR_no_error,
GL_KHR_parallel_shader_compile, GL_KHR_texture_compression_astc_ldr,
GL_KHR_texture_compression_astc_sliced_3d, GL_MESA_pack_invert,
GL_MESA_shader_integer_functions, GL_MESA_texture_signed_rgba,
GL_MESA_ycbcr_texture, GL_NV_conditional_render, GL_NV_depth_clamp,
GL_NV_packed_depth_stencil, GL_OES_EGL_image, GL_S3_s3tc
OpenGL version string: 3.1 Mesa 19.1.17
OpenGL shading language version string: 1.40
OpenGL context flags: (none)
OpenGL extensions:
GL_AMD_conservative_depth, GL_AMD_draw_buffers_blend,
GL_AMD_multi_draw_indirect, GL_AMD_seamless_cubemap_per_texture,
GL_AMD_shader_stencil_export, GL_AMD_shader_trinary_minmax,
GL_AMD_texture_texture4, GL_ANGLE_texture_compression_dxt3,
GL_ANGLE_texture_compression_dxt5, GL_APPLE_packed_pixels,
GL_ARB_ES2_compatibility, GL_ARB_ES3_compatibility,
GL_ARB_arrays_of_arrays, GL_ARB_base_instance, 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_conditional_render_inverted, GL_ARB_conservative_depth,
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_direct_state_access, 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_enhanced_layouts,
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_object,
GL_ARB_framebuffer_sRGB, GL_ARB_get_program_binary,
GL_ARB_get_texture_sub_image, GL_ARB_half_float_pixel,
GL_ARB_half_float_vertex, GL_ARB_instanced_arrays,
GL_ARB_internalformat_query, GL_ARB_internalformat_query2,
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_parallel_shader_compile,
GL_ARB_pipeline_statistics_query, GL_ARB_pixel_buffer_object,
GL_ARB_point_parameters, GL_ARB_point_sprite, GL_ARB_polygon_offset_clamp,
GL_ARB_program_interface_query, GL_ARB_provoking_vertex,
GL_ARB_robustness, GL_ARB_sampler_objects, GL_ARB_seamless_cube_map,
GL_ARB_seamless_cubemap_per_texture, GL_ARB_separate_shader_objects,
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_shading_language_420pack, GL_ARB_shading_language_packing,
GL_ARB_shadow, GL_ARB_stencil_texturing, GL_ARB_sync,
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_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_blend_equation_separate,
GL_ATI_draw_buffers, GL_ATI_fragment_shader, 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_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_texture, 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_multisample_blit_scaled, GL_EXT_framebuffer_object,
GL_EXT_framebuffer_sRGB, 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_specular_color, GL_EXT_shader_integer_mix,
GL_EXT_shadow_funcs, GL_EXT_stencil_two_side, GL_EXT_stencil_wrap,
GL_EXT_subtexture, GL_EXT_texture, 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_add, GL_EXT_texture_env_combine,
GL_EXT_texture_env_dot3, GL_EXT_texture_integer, 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_sRGB_R8,
GL_EXT_texture_sRGB_decode, 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_IBM_multimode_draw_arrays, GL_IBM_rasterpos_clip,
GL_IBM_texture_mirrored_repeat, GL_INGR_blend_func_separate,
GL_KHR_context_flush_control, GL_KHR_debug, GL_KHR_no_error,
GL_KHR_parallel_shader_compile, GL_KHR_texture_compression_astc_ldr,
GL_KHR_texture_compression_astc_sliced_3d, GL_MESA_pack_invert,
GL_MESA_shader_integer_functions, GL_MESA_texture_signed_rgba,
GL_MESA_window_pos, GL_MESA_ycbcr_texture, GL_NV_blend_square,
GL_NV_conditional_render, GL_NV_depth_clamp, GL_NV_fog_distance,
GL_NV_light_max_exponent, GL_NV_packed_depth_stencil,
GL_NV_primitive_restart, GL_NV_texgen_reflection,
GL_NV_texture_env_combine4, GL_NV_texture_rectangle, GL_OES_EGL_image,
GL_OES_read_format, GL_S3_s3tc, GL_SGIS_generate_mipmap,
GL_SGIS_texture_border_clamp, GL_SGIS_texture_edge_clamp,
GL_SGIS_texture_lod, GL_SUN_multi_draw_arrays
OpenGL ES profile version string: OpenGL ES 3.0 Mesa 19.1.17
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.00
OpenGL ES profile extensions:
GL_ANGLE_texture_compression_dxt3, GL_ANGLE_texture_compression_dxt5,
GL_APPLE_texture_max_level, GL_EXT_base_instance,
GL_EXT_blend_func_extended, GL_EXT_blend_minmax,
GL_EXT_clip_cull_distance, GL_EXT_color_buffer_float,
GL_EXT_compressed_ETC1_RGB8_sub_texture, GL_EXT_copy_image,
GL_EXT_depth_clamp, GL_EXT_discard_framebuffer,
GL_EXT_disjoint_timer_query, GL_EXT_draw_buffers,
GL_EXT_draw_buffers_indexed, GL_EXT_draw_elements_base_vertex,
GL_EXT_float_blend, GL_EXT_frag_depth, GL_EXT_map_buffer_range,
GL_EXT_multi_draw_arrays, GL_EXT_occlusion_query_boolean,
GL_EXT_polygon_offset_clamp, GL_EXT_read_format_bgra,
GL_EXT_sRGB_write_control, GL_EXT_separate_shader_objects,
GL_EXT_shader_integer_mix, GL_EXT_texture_border_clamp,
GL_EXT_texture_compression_bptc, GL_EXT_texture_compression_dxt1,
GL_EXT_texture_compression_rgtc, GL_EXT_texture_compression_s3tc,
GL_EXT_texture_compression_s3tc_srgb, GL_EXT_texture_format_BGRA8888,
GL_EXT_texture_query_lod, GL_EXT_texture_rg, GL_EXT_texture_sRGB_R8,
GL_EXT_texture_sRGB_decode, GL_EXT_texture_type_2_10_10_10_REV,
GL_EXT_unpack_subimage, GL_KHR_context_flush_control, GL_KHR_debug,
GL_KHR_no_error, GL_KHR_parallel_shader_compile,
GL_KHR_texture_compression_astc_ldr,
GL_KHR_texture_compression_astc_sliced_3d,
GL_MESA_shader_integer_functions, GL_NV_conditional_render,
GL_NV_draw_buffers, GL_NV_fbo_color_attachments, GL_NV_read_buffer,
GL_NV_read_depth, GL_NV_read_depth_stencil, GL_NV_read_stencil,
GL_OES_EGL_image, GL_OES_EGL_image_external,
GL_OES_EGL_image_external_essl3, GL_OES_EGL_sync,
GL_OES_compressed_ETC1_RGB8_texture, GL_OES_copy_image, GL_OES_depth24,
GL_OES_depth_texture, GL_OES_depth_texture_cube_map,
GL_OES_draw_buffers_indexed, GL_OES_draw_elements_base_vertex,
GL_OES_element_index_uint, GL_OES_fbo_render_mipmap,
GL_OES_get_program_binary, GL_OES_mapbuffer, GL_OES_packed_depth_stencil,
GL_OES_required_internalformat, GL_OES_rgb8_rgba8,
GL_OES_standard_derivatives, GL_OES_stencil8, GL_OES_surfaceless_context,
GL_OES_texture_3D, GL_OES_texture_border_clamp, GL_OES_texture_float,
GL_OES_texture_float_linear, GL_OES_texture_half_float,
GL_OES_texture_half_float_linear, GL_OES_texture_npot,
GL_OES_texture_stencil8, GL_OES_vertex_array_object,
GL_OES_vertex_half_float
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VZ
Apr 27, 2026, 8:29:35 AM (yesterday) Apr 27
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vadz left a comment (wxWidgets/wxWidgets#26410)Sorry, I don't understand how can this be a regression: in 3.2.8 we had this code:
so it could never work with EGL < 1.5 AFAICS. Are you sure you didn't use a patched version of wx before?
Also, eglCreatePlatformWindowSurface() documentation says
eglCreatePlatformWindowSurface is supported only if the EGL version is 1.5 or greater.
so I have serious doubts about whether it's a good idea to use it with EGL < 1.5.
Finally, one of the goals of the changes in 3.2.9 was to bring support for EGL 1.4 and using eglCreateWindowSurface() for it is supposed to work. Do you have any idea why it doesn't for you?
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Paul Ripke
Apr 27, 2026, 10:14:56 AM (yesterday) Apr 27
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stixpjr left a comment (wxWidgets/wxWidgets#26410)You're right; I appear to have had pieces of a06400f
in my local patches against 3.2.8 that I'd completely forgotten about. I must've run into a similar problem and merely allowed/forced EGL 1.4 to run.
It seems if I leave the code to call eglCreateWindowSurface, I trip the assert:
./src/unix/glegl.cpp(704): assert ""Assert failure"" failed in CreateSurface(): Unable to create EGL surface
This is odd; I have test code just using EGL calling eglCreateWindowSurface that works fine…
Looking at the EGL code, the major difference between eglCreateWindowSurface and eglCreatePlatformWindowSurface is that the latter calls _fixupNativeWindow on the window arg:
https://gitlab.freedesktop.org/mesa/mesa/-/blob/main/src/egl/main/eglapi.c?ref_type=heads#L1093-1105
Indeed, changing the call to deref the pointer works:
return eglCreateWindowSurface(m_display, *m_config,
reinterpret_cast<EGLNativeWindowType>(*static_cast<Window*>(window)),
NULL);
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VZ
Apr 27, 2026, 10:20:52 AM (yesterday) Apr 27
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vadz left a comment (wxWidgets/wxWidgets#26410)Thanks, it looks like this is indeed wrong. As this call was added 602b80d (Support EGL 1.4 instead of previously required 1.5, 2025-11-23) let me cc @dsa-t just in case I'm missing something. But if not, we need to apply this fix both in master and in 3.2.
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VZ
Apr 27, 2026, 10:24:34 AM (yesterday) Apr 27
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vadz left a comment (wxWidgets/wxWidgets#26410)Ah, wait, I know what I'm missing: the current code is correct for Wayland but doesn't work with X11. The fix above makes it work with X11 but crashes with Wayland. How wonderful...
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VZ
Apr 27, 2026, 11:19:58 AM (yesterday) Apr 27
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VZ
Apr 27, 2026, 11:20:18 AM (yesterday) Apr 27
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vadz left a comment (wxWidgets/wxWidgets#26410)Please check if 8a41fd0 (Fix creating wxGLCanvas when using EGL 1.4 with X11, 2026-04-27) really fixes this for you — if it does, I'll backport it to 3.2 too. TIA!
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Paul Ripke
4:48 AM (9 hours ago) 4:48 AM
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stixpjr left a comment (wxWidgets/wxWidgets#26410)Yes, that works on 3.2.9 - just watch to not clobber commit 2217493 like I did :)
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