Changelog:

• Bug fixes:
  • Fix linking issue with some installations of glslang >= 11.0.0.
  • Compatibility with glslang >= 8.13.3743.
  • Compatibility with new glslang semantic versioning scheme.
  • Fix broken shaders on some versions of GLES by defaulting to 32-bit precision for floating point math.
  • Fix the extension check for glInvalidateTexImage.
  • Fix pl_tex_create on older GLES versions.
  • Fix OpenGL logging thread safety.
  • Fix undefined memcmp() in pl_shader_av1_grain.
  • Fix pl_render_target.repr being ignored by pl_render_image.
  • Fix 3DLUT generation code (generated corrupt LUTs in all cases).
  • Fix symbol visibility on some versions of GCC.
  • Fix potential overflow in BT.2390 shader.
  • Properly restrict pl_shader_sample_polar to GLSL >= 130.
  • Fix Vulkan function loading of promoted core functions.
• Other changes:
  • Tiny performance gain in 3DLUT generation.
  • pl_opengl_create now logs GL_EXTENSIONS.
  • Log some additional VkResult enum members.
  • Improve several Vulkan log messages by using friendly names of enums.
  • Add a copy of the config.h variables to the libplacebo.pc file.

1. Tested Vulkan renderer in mpv.
2. Played back HDR video in VLC and checked HDR-to-SDR gamut conversion.