diff options
| -rw-r--r-- | vncviewer/Win32PixelBuffer.cxx | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/vncviewer/Win32PixelBuffer.cxx b/vncviewer/Win32PixelBuffer.cxx index 71e18c47..8f9bf024 100644 --- a/vncviewer/Win32PixelBuffer.cxx +++ b/vncviewer/Win32PixelBuffer.cxx @@ -77,8 +77,15 @@ void PlatformPixelBuffer::draw(int src_x, int src_y, int x, int y, int w, int h) if (!SelectObject(dc, bitmap)) throw rdr::SystemException("SelectObject failed", GetLastError()); - if (!BitBlt(fl_gc, x, y, w, h, dc, src_x, src_y, SRCCOPY)) - throw rdr::SystemException("BitBlt failed", GetLastError()); + if (!BitBlt(fl_gc, x, y, w, h, dc, src_x, src_y, SRCCOPY)) { + // If the desktop we're rendering to is inactive (like when the screen + // is locked or the UAC is active), then GDI calls will randomly fail. + // This is completely undocumented so we have no idea how best to deal + // with it. For now, we've only seen this error and for this function + // so only ignore this combination. + if (GetLastError() != ERROR_INVALID_HANDLE) + throw rdr::SystemException("BitBlt failed", GetLastError()); + } DeleteDC(dc); } |