Clarified and cleaned up WebGL extension support list.

For more clarity it's now better to explicitly list all extensions for
each API even though they might get duplicated. For WebGL they also link
to WebGL spec, which might contain a bit more info.

doc/opengl-support.dox

@@ -177,7 +177,7 @@ GLSL 4.30                                   | done
 @extension{ARB,clear_buffer_object}         | |
 @extension{ARB,compute_shader}              | |
 @extension{ARB,copy_image}                  | |
-@extension{KHR,debug} (also in ES)          | missing log retrieval, sync, pipeline and sampler label
+@extension{KHR,debug}                       | missing log retrieval, sync, pipeline and sampler label
 @extension{ARB,explicit_uniform_location}   | done
 @extension{ARB,fragment_layer_viewport}     | done (shading language only)
 @extension{ARB,framebuffer_no_attachments}  | |
@@ -227,16 +227,16 @@ GLSL 4.50                                   | done
 @extension{ARB,get_texture_sub_image}       | missing compressed texture queries
 @extension{ARB,shader_texture_image_samples} | done (shading language only)
 @extension{ARB,texture_barrier}             | |
-@extension{KHR,context_flush_control} (also in ES) | |
+@extension{KHR,context_flush_control}       | |
-@extension{KHR,robustness} (also in ES)     | |
+@extension{KHR,robustness}                  | |
 
 @subsection opengl-support-extensions ARB / Khronos OpenGL extensions
 
 Extension                                   | Status
 ------------------------------------------- | ------
 @extension{ARB,robustness}                  | done
-@extension3{KHR,texture_compression_astc_ldr,texture_compression_astc_hdr} (also in ES) | |
+@extension3{KHR,texture_compression_astc_ldr,texture_compression_astc_hdr} | |
-@extension{KHR,texture_compression_astc_hdr} (also in ES) | |
+@extension{KHR,texture_compression_astc_hdr} | |
 @extension{ARB,robustness_isolation}        | done
 @extension{ARB,bindless_texture}            | |
 @extension{ARB,compute_variable_group_size} | |
@@ -260,13 +260,13 @@ Extension                                   | Status
 @extension{AMD,vertex_shader_layer}         | done (shading language only)
 @extension{AMD,shader_trinary_minmax}       | done (shading language only)
 @extension{ATI,texture_mirror_once}         | done (GL 4.4 subset)
-@extension{EXT,texture_filter_anisotropic} (also in ES, WebGL) | done
+@extension{EXT,texture_filter_anisotropic}  | done
 @extension{EXT,texture_mirror_clamp}        | only GL 4.4 subset
 @extension{EXT,direct_state_access}         | done for implemented functionality
-@extension{EXT,texture_sRGB_decode} (also in ES) | done
+@extension{EXT,texture_sRGB_decode}         | done
-@extension{EXT,shader_integer_mix} (also in ES) | done (shading language only)
+@extension{EXT,shader_integer_mix}          | done (shading language only)
-@extension2{EXT,debug_label} (also in ES)   | missing pipeline and sampler label
+@extension2{EXT,debug_label}                | missing pipeline and sampler label
-@extension2{EXT,debug_marker} (also in ES)  | done
+@extension2{EXT,debug_marker}               | done
 @extension{GREMEDY,string_marker}           | done
 
 @subsection opengl-support-es20 OpenGL ES 2.0
@@ -290,15 +290,15 @@ Extension                                   | Status
 ------------------------------------------- | ------
 @es_extension{ANGLE,framebuffer_blit}       | done
 @es_extension{ANGLE,framebuffer_multisample} | done
-@es_extension{ANGLE,instanced_arrays} (also in WebGL 1.0) | done
+@es_extension{ANGLE,instanced_arrays}       | done
 @es_extension{ANGLE,depth_texture}          | done
 @es_extension{APPLE,framebuffer_multisample} | done (ES 3.0 subset)
 @es_extension{APPLE,texture_max_level}      | done
 @es_extension{ARM,rgba8}                    | done
 @es_extension{EXT,texture_type_2_10_10_10_REV} | done
 @es_extension{EXT,discard_framebuffer}      | done
-@es_extension2{EXT,blend_minmax,blend_minmax} (also in WebGL 1.0) | done
+@es_extension2{EXT,blend_minmax,blend_minmax} | done
-@es_extension{EXT,shader_texture_lod} (also in WebGL 1.0) | done (shading language only)
+@es_extension{EXT,shader_texture_lod}       | done (shading language only)
 @es_extension{EXT,occlusion_query_boolean}  | done
 @es_extension{EXT,shadow_samplers}          | done
 @es_extension{EXT,texture_rg}               | done
@@ -317,27 +317,24 @@ Extension                                   | Status
 @es_extension{NV,shadow_samplers_array}     | done (shading language only)
 @es_extension{NV,shadow_samplers_cube}      | done (shading language only)
 @es_extension{OES,depth24}                  | done
-@es_extension{OES,element_index_uint} (also in WebGL 1.0) | done
+@es_extension{OES,element_index_uint}       | done
 @es_extension{OES,rgb8_rgba8}               | done (desktop-compatible subset)
 @es_extension{OES,texture_3D}               | done
-@es_extension2{OES,texture_half_float_linear,OES_texture_float_linear} (also in WebGL 1.0) | done
+@es_extension2{OES,texture_half_float_linear,OES_texture_float_linear} | done
-@es_extension{OES,texture_float_linear} (also in WebGL 1.0) | done
+@es_extension{OES,texture_float_linear}     | done
-@es_extension2{OES,texture_half_float,OES_texture_float} (also in WebGL 1.0) | done
+@es_extension2{OES,texture_half_float,OES_texture_float} | done
-@es_extension{OES,texture_float} (also in WebGL 1.0) | done
+@es_extension{OES,texture_float}            | done
 @es_extension{OES,texture_npot}             | done (nothing to do)
 @es_extension{OES,vertex_half_float}        | done
 @es_extension{OES,packed_depth_stencil}     | done
 @es_extension{OES,depth_texture}            | done
-@es_extension{OES,standard_derivatives} (also in WebGL 1,0) | done
+@es_extension{OES,standard_derivatives}     | done
-@es_extension{OES,vertex_array_object} (also in WebGL 1.0) | done
+@es_extension{OES,vertex_array_object}      | done
 @es_extension{OES,required_internalformat}  | done (desktop-compatible subset)
 @es_extension{OES,surfaceless_context}      | done
 
 @subsection opengl-support-es-extensions OpenGL ES extensions to match desktop functionality
 
-Only extensions not already listed in above tables (marked with *also in ES*)
-are included here.
-
 @todo @es_extension{NV,non_square_matrices}
 @todo Support also IMG_multisampled_render_to_texture? It has different enum
     values (!)
@@ -346,15 +343,25 @@ Extension                                   | Status
 ------------------------------------------- | ------
 @es_extension{APPLE,texture_format_BGRA8888} | done
 @es_extension{CHROMIUM,map_sub} (NaCl only) | only buffer mapping
+@es_extension{EXT,texture_filter_anisotropic} | done
 @es_extension{EXT,texture_format_BGRA8888}  | done
 @es_extension{EXT,read_format_bgra}         | done
 @es_extension2{EXT,multi_draw_arrays,multi_draw_arrays} | done
-@es_extension{EXT,disjoint_timer_query}     | only time elapsed query
+@es_extension{EXT,debug_label}              | see above
+@es_extension{EXT,debug_marker}             | done
 @es_extension{EXT,separate_shader_objects}  | only direct uniform binding
 @es_extension{EXT,sRGB}                     | done
 @es_extension{EXT,multisampled_render_to_texture} | only renderbuffer storage
 @es_extension{EXT,robustness}               | done
+@es_extension{EXT,disjoint_timer_query}     | only time elapsed query
+@es_extension{EXT,texture_sRGB_decode}      | done
+@es_extension{EXT,shader_integer_mix}       | done (shading language only)
+@extension3{KHR,texture_compression_astc_ldr,texture_compression_astc_hdr} | |
+@extension{KHR,texture_compression_astc_hdr} | |
+@es_extension{KHR,debug}                    | see above
+@es_extension{KHR,robustness}               | |
 @es_extension{KHR,robust_buffer_access_behavior} | done (nothing to do)
+@es_extension{KHR,context_flush_control}    | |
 @es_extension2{NV,read_buffer_front,NV_read_buffer} | done
 @es_extension2{NV,read_depth,NV_read_depth_stencil} | done
 @es_extension2{NV,read_stencil,NV_read_depth_stencil} | done
@@ -377,18 +384,28 @@ supported.
 
 @subsection opengl-support-webgl20-extensions WebGL 1.0 extensions to match WebGL 2.0 functionality
 
-Only extensions not already listed in above tables (marked with *also in WebGL
-1.0*) are included here.
-
 Extension                                   | Status
 ------------------------------------------- | ------
+@webgl_extension{ANGLE,instanced_arrays}    | done
+@webgl_extension{EXT,blend_minmax}          | done
+@webgl_extension{EXT,shader_texture_lod}    | done (shading language only)
+@webgl_extension{OES,texture_float}         | done
+@webgl_extension{OES,texture_half_float}    | done
+@webgl_extension{OES,standard_derivatives}  | done
+@webgl_extension{OES,vertex_array_object}   | done
+@webgl_extension{OES,element_index_uint}    | done
+@webgl_extension{OES,texture_float_linear}  | done
+@webgl_extension{OES,texture_half_float_linear} | done
 @webgl_extension{WEBGL,depth_texture}       | done
 @webgl_extension{WEBGL,draw_buffers}        | done
 
 @subsection opengl-support-webgl-extensions WebGL extensions to match desktop functionality
 
-All currently implemented extensions are already listed in above tables (marked
+Extension                                   | Status
-with *also in WebGL*).
+------------------------------------------- | ------
+@webgl_extension{EXT,texture_filter_anisotropic} | done
+@webgl_extension{EXT,sRGB}                  | done
+@webgl_extension{EXT,disjoint_timer_query}  | only time elapsed query
 
 @section opengl-unsupported Unsupported OpenGL features
 

src/Magnum/Context.cpp

@@ -231,10 +231,10 @@ const std::vector<Extension>& Extension::extensions(Version version) {
         _extension(GL,OES,texture_float),
         _extension(GL,OES,texture_half_float),
         _extension(GL,OES,standard_derivatives),
+        _extension(GL,OES,vertex_array_object),
         _extension(GL,OES,element_index_uint),
         _extension(GL,OES,texture_float_linear),
         _extension(GL,OES,texture_half_float_linear),
-        _extension(GL,OES,vertex_array_object),
         _extension(GL,WEBGL,depth_texture),
         _extension(GL,WEBGL,draw_buffers)};
     #endif

src/Magnum/Extensions.h

@@ -240,23 +240,25 @@ namespace GL {
         _extension(GL,EXT,sRGB,                     GLES200,    None) // #17
         #ifdef MAGNUM_TARGET_GLES2
         _extension(GL,EXT,blend_minmax,             GLES200, GLES300) // #25
-        _extension(GL,EXT,shader_texture_lod,       GLES200, GLES300) // #27
         #endif
         _extension(GL,EXT,disjoint_timer_query,     GLES200,    None) // #26
+        #ifdef MAGNUM_TARGET_GLES2
+        _extension(GL,EXT,shader_texture_lod,       GLES200, GLES300) // #27
+        #endif
     } namespace OES {
         #ifdef MAGNUM_TARGET_GLES2
         _extension(GL,OES,texture_float,            GLES200, GLES300) // #1
         _extension(GL,OES,texture_half_float,       GLES200, GLES300) // #2
         _extension(GL,OES,standard_derivatives,     GLES200, GLES300) // #4
+        _extension(GL,OES,vertex_array_object,      GLES200, GLES300) // #5
         _extension(GL,OES,element_index_uint,       GLES200, GLES300) // #10
         _extension(GL,OES,texture_float_linear,     GLES200, GLES300) // #20
         _extension(GL,OES,texture_half_float_linear, GLES200, GLES300) // #21
-        _extension(GL,OES,vertex_array_object,      GLES200, GLES300) // #5
         #endif
     } namespace WEBGL {
         #ifdef MAGNUM_TARGET_GLES2
-        _extension(GL,WEBGL,depth_texture,          GLES200, GLES300) // #9, EXT
+        _extension(GL,WEBGL,depth_texture,          GLES200, GLES300) // #9
-        _extension(GL,WEBGL,draw_buffers,           GLES200, GLES300) // #18, EXT
+        _extension(GL,WEBGL,draw_buffers,           GLES200, GLES300) // #18
         #endif
     }
     #else