Context lifecycle

• wglCreateContext creates one rendering context for one device context.
• wglMakeCurrent binds one rendering context and one device context as the current WGL state.
• wglDeleteContext destroys one rendering context.
• The involved handle schemas are HDC and HGLRC.

Procedure lookup

• wglGetProcAddress takes one raw procedure-name address declared as Natx.
• wglGetProcAddress returns one raw pointer-sized result declared as Natx.
• The module exposes no typed procedure-wrapper schema and no ownership wrapper for the returned address.

Imported functions

• wglCreateContext (hdc -- context): creates one rendering context for one device context.
• wglDeleteContext (context -- result): destroys one rendering context.
• wglGetProcAddress (procedureName -- address): looks up one OpenGL or WGL procedure by name address.
• wglMakeCurrent (hdc context -- result): binds one rendering context to one device context.

Signature examples

Printing imported names during compilation shows the exact imported signatures.

"windows/opengl32" use
"control" use

{} Int32 {} [
  @wglCreateContext printStack _:;
  @wglDeleteContext printStack _:;
  @wglGetProcAddress printStack _:;
  @wglMakeCurrent printStack _:;
  0
] "main" exportFunction

Expected Output During Compilation

{Arg1: {DC: (); unused: Int32;} Cref;} {GLRC: (); unused: Int32;} Cref {convention: "";} codeRef
{Arg1: {GLRC: (); unused: Int32;} Cref;} Int32 {convention: "";} codeRef
{procedureName: Natx;} Natx {convention: "";} codeRef
{arg1: {DC: (); unused: Int32;} Cref; arg2: {GLRC: (); unused: Int32;} Cref;} Int32 {convention: "";} codeRef

See also

• windows/gdi32: GDI32 pixel-format and buffer-swap declarations.
• windows/user32: User32 windowing, message, cursor, monitor, and device-context declarations.