RGLMakeCurrent Class Reference

RAII guard for scoped eglMakeCurrent() calls. More...

#include <RGLMakeCurrent.h>

Public Member Functions
	RGLMakeCurrent () noexcept
	Captures the current EGL binding without changing it.
	RGLMakeCurrent (EGLDisplay display, EGLSurface draw, EGLSurface read, EGLContext context) noexcept
	Captures the current EGL binding and makes the given one current.
	~RGLMakeCurrent () noexcept
	Restores the captured EGL binding.
bool	restore () noexcept
	Restores the EGL binding captured at construction.

Static Public Member Functions
static RGLMakeCurrent	FromDevice (RGLDevice *device, bool keepSurfaces) noexcept
	Creates a guard that makes the given device's context current on the calling thread.

Detailed Description

RAII guard for scoped eglMakeCurrent() calls.

On construction it captures the currently bound EGL display, draw/read surfaces, and context, then optionally binds a new context. On destruction (or an explicit restore()) it re-binds the previously captured state. This is used throughout the GL backend to temporarily make a device's context current on the calling thread without disturbing the caller's own binding.

Constructor & Destructor Documentation

RGLMakeCurrent() [1/2]

RGLMakeCurrent ( )

inlinenoexcept

Captures the current EGL binding without changing it.

Useful to snapshot and later restore() the current context.

RGLMakeCurrent() [2/2]

RGLMakeCurrent ( EGLDisplay  display, EGLSurface  draw, EGLSurface  read, EGLContext  context  )

inlinenoexcept

Captures the current EGL binding and makes the given one current.

Parameters

display	The EGL display to bind.
draw	The draw surface to bind.
read	The read surface to bind.
context	The context to make current.

~RGLMakeCurrent()

~RGLMakeCurrent ( )

inlinenoexcept

Restores the captured EGL binding.

Member Function Documentation

FromDevice()

static RGLMakeCurrent FromDevice ( RGLDevice *  device, bool  keepSurfaces  )

staticnoexcept

Creates a guard that makes the given device's context current on the calling thread.

Parameters

device	The device whose per-thread EGL context should be made current.
keepSurfaces	If true and the device's display is already current, the currently bound draw/read surfaces are preserved; otherwise the context is bound surfaceless.

Returns

A guard bound to the device's context, or a no-op guard (EGL_NO_DISPLAY) if the device is invalid.

restore()

bool restore ( )

noexcept

Restores the EGL binding captured at construction.

Has no effect if already restored (either by a prior call or by the destructor).

Returns

true if the state was restored by this call, false if it had already been restored.