OpenGlContextCallbacks struct

Raw C function pointers overriding how the library binds an OpenGL context; see QarOpenGlContextCallbacks in types.h. Every one is optional and called on the library's internal graphics thread; zero uses the library's own platform implementation for that step.

Namespace: Quaternar.Qaros · Assembly: Quaternar.Qaros.dll

public readonly struct OpenGlContextCallbacks

Remarks

A pointer obtained with Marshal.GetFunctionPointerForDelegate is valid only while its delegate is reachable: keep the delegates alive for as long as the sender exists.

Constructors

OpenGlContextCallbacks(nint, nint, nint, nint, nint)

public OpenGlContextCallbacks(nint userState, nint getProcAddress, nint makeCurrent, nint captureCurrent, nint restoreCurrent)

Parameters

Name	Type	Description
userState	nint
getProcAddress	nint
makeCurrent	nint
captureCurrent	nint
restoreCurrent	nint

Properties

Member	Description
UserState	Passed unchanged to every callback; may be zero.
GetProcAddress	void* (void* userState, const char* name): resolves a GL entry point, as eglGetProcAddress, wglGetProcAddress or glXGetProcAddressARB do. Zero uses the platform loader.
MakeCurrent	bool (void* userState): binds the extension's context to the calling thread with the handles passed in the extension.
CaptureCurrent	QarOpenGlContextThreadState (void* userState): reads the thread's current binding before OpenGlContextCallbacks.MakeCurrent replaces it.
RestoreCurrent	bool (void* userState, const QarOpenGlContextThreadState* state): re-binds what OpenGlContextCallbacks.CaptureCurrent read once the library is done. When the state's has_context is false the thread had nothing bound, so bind nothing.

UserState

Passed unchanged to every callback; may be zero.

public nint UserState { get; }

Value: nint

GetProcAddress

void* (void* userState, const char* name): resolves a GL entry point, as eglGetProcAddress, wglGetProcAddress or glXGetProcAddressARB do. Zero uses the platform loader.

public nint GetProcAddress { get; }

Value: nint

MakeCurrent

bool (void* userState): binds the extension's context to the calling thread with the handles passed in the extension.

public nint MakeCurrent { get; }

Value: nint

CaptureCurrent

QarOpenGlContextThreadState (void* userState): reads the thread's current binding before OpenGlContextCallbacks.MakeCurrent replaces it.

public nint CaptureCurrent { get; }

Value: nint

RestoreCurrent

bool (void* userState, const QarOpenGlContextThreadState* state): re-binds what OpenGlContextCallbacks.CaptureCurrent read once the library is done. When the state's has_context is false the thread had nothing bound, so bind nothing.

public nint RestoreCurrent { get; }

Value: nint