docs: note GL_EXT_packed_float, GL_EXT_shared_exponent extensions
diff --git a/docs/GL3.txt b/docs/GL3.txt
index 889edef..a485878 100644
--- a/docs/GL3.txt
+++ b/docs/GL3.txt
@@ -16,6 +16,7 @@
Conditional rendering (GL_NV_conditional_render) DONE (swrast & softpipe)
Map buffer subranges (GL_APPLE_flush_buffer_range) not started
Float textures, renderbuffers some infrastructure done
+ (incl. GL_EXT_packed_float, GL_EXT_shared_exponent)
Framebuffer objects (GL_EXT_framebuffer_object) DONE
Half-float some infrastructure done
Multisample blit DONE