eglMakeCurrent function

void eglMakeCurrent(Pointer<Void> display, Pointer<Void> draw, Pointer<Void> read, Pointer<Void> context,)

Implementation

void eglMakeCurrent(
  Pointer<Void> display,
  Pointer<Void> draw,
  Pointer<Void> read,
  Pointer<Void> context,
) {
  // Check for invalid small pointer values (like 0x1 or 0x2) which are not valid EGL surfaces
  // These may be returned by some EGL implementations on macOS
  bool isInvalidSurface(Pointer<Void> ptr) {
    final address = ptr.address;
    return address > 0 && address < 1000; // Arbitrary cutoff for "suspiciously small" pointer values
  }

  if (isInvalidSurface(draw) || isInvalidSurface(read)) {
    // Try to create a proper dummy surface if we don't have one
    try {
      if (display != nullptr) {
        // Try to find any valid config
        final configs = eglGetConfigs(display, maxConfigs: 1);
        if (configs.isNotEmpty) {
          // Create a minimal pbuffer surface
          final attributes = {
            EglSurfaceAttributes.width: 4,
            EglSurfaceAttributes.height: 4,
          };
          final newSurface = eglCreatePbufferSurface(display, configs[0],attributes: attributes);

          // Now make current with the new surface instead of the invalid ones
          final nativeCallResult = _libEGL!.eglMakeCurrent(display, newSurface, newSurface, context) ==1;
          if (nativeCallResult) {
            return;
          } else {
            // Fall through to the original error handling
          }
        }
      }
    } catch (e) {
      // Fall through to the original error handling
    }
  }

  // Original implementation
  final nativeCallResult = _libEGL!.eglMakeCurrent(display, draw, read, context) == 1;

  if (nativeCallResult) {
    return;
  }

  throw EglException('Failed to make current using display [$display], draw [$draw], read [$read], context [$context].');
}