Changelog

Added

• Initial extraction from easy-gl as a standalone low-level GL layer.
• metagl::Initialize(GlGetProcAddressFn) / metagl::IsInitialized() loader API.
• metagl::LoadCurrentContext() alias for Initialize().
• metagl::IsFunctionAvailable(std::string_view) per-function availability check.
• Type-safe enum class wrappers covering all ES 2.0–3.2 parameter domains:
  • BufferTarget, BufferUsage, BufferParameter, MapBufferAccessMask
  • ShaderType, ShaderStageMask, ShaderParameter, ShaderBinaryFormat
  • ProgramParameter, ProgramInterface, ProgramInterfaceParameter, ProgramResourceProperty
  • TextureTarget, TextureParameter, TextureMinFilter, TextureMagFilter, TextureFilter
  • TextureWrapMode, TextureWrap, TextureCompareMode, TextureSwizzle
  • TextureLevelParameter, TextureUnit
  • InternalFormat, CompressedInternalFormat
  • PixelFormat, PixelType, PixelStoreParam
  • BlendFactor, BlendEquation, BlendMode
  • Capability, ClearBufferBit, ClearBuffer
  • CompareFunc, StencilOp, CullFace, FrontFace
  • PrimitiveType, DataType
  • FramebufferTarget, FramebufferAttachment, FramebufferStatus
  • FramebufferAttachmentParameter, FramebufferDefaultParameter
  • RenderbufferTarget, RenderbufferParameter
  • VertexAttribParameter
  • QueryTarget, QueryParameter, QueryObjectParameter
  • SyncCondition, SyncParameter, SyncWaitResult, SyncFlushMask
  • ImageAccess, MemoryBarrierMask
  • TransformFeedbackTarget, TransformFeedbackBufferMode
  • UniformType, UniformBlockParameter, UniformParameter
  • StringName, IntegerName, GetParameter, GetPointerParameter
  • ErrorCode, HintTarget, HintMode, PrecisionType
  • DebugSource, DebugType, DebugSeverity, DebugObjectLabel
  • ContextFlagMask, GraphicsResetStatus, ResetNotificationStrategy
  • ProvokingVertex, DrawBuffer, ReadBuffer
  • ProgramBinaryFormat, ShaderBinaryFormat
  • TessGenMode, TessGenSpacing
  • … and more (89 enum classes total)
• Bitwise operator| for all bitfield enum classes: ClearBufferBit, MapBufferAccessMask, ShaderStageMask, MemoryBarrierMask, SyncFlushMask.
• Full set of ~400 metagl::gl* wrapper functions covering: state management, buffer objects, vertex arrays, drawing, shaders, programs, uniforms, textures, framebuffers, renderbuffers, queries, sync objects, compute, transform feedback, debug output, and separable programs.
• ContextInfo struct with API kind, ES/WebGL version flags, vendor/renderer strings, and monotonic generation counter.
• ContextStatus lifecycle enum: NotCreated / Current / Lost / Restored.
• metagl::GetContextInfo(), GetContextGeneration(), GetContextStatus(), IsContextLost(), MarkContextLost(), MarkContextRestored().
• Capabilities struct with version flags, extension list, driver strings.
• metagl::GetCapabilities(), SupportsGLES20/30/31/32(), SupportsWebGL2(), HasExtension().
• EnumNames.hpp — generated to_string() overloads for all 89 enum classes.
• Debug.hpp — optional per-call GL logging system (METAGLDEBUG): per-call function name, typed enum argument names, return values, timestamps.
• CMake target meta-gl with alias meta-gl::meta-gl, C++20 standard, static library.
• Emscripten.hpp — WebGL-specific helpers for Emscripten builds.

2026-06 — METAGLDEBUG disabled by default

The debug logging macro is off by default (#define METAGLDEBUG is commented out in Debug.hpp). It must be explicitly enabled by the user or via a compiler flag. This ensures that debug builds without intentional logging are not penalized in performance.

2026-06 — EnumNames.hpp generated separately

EnumNames.hpp is a generated file containing to_string() overloads for all 89 enum classes. It is included only from Debug.hpp (when METAGLDEBUG is active), not from the main headers. This keeps compile times low for non-debug builds.

2026-06 — No C++ modules

The project deliberately avoids C++ modules to maintain compatibility with a wider range of compilers and build systems, including older GCC and Clang versions commonly found on embedded Linux and Android NDK toolchains.

2026-06 — No RAII in meta-gl

meta-gl is a thin wrapper layer. RAII resource management belongs in easy-gl. Mixing RAII into meta-gl would blur the layer boundary and make it impossible for easy-gl to implement its own ownership model without conflicts.