Overview
VX/SMG$ provides a call-compatible implementation of OpenVMS screen management routines for x86 and ARM Linux. It enables OpenVMS interactive and terminal-based applications to maintain structured display control, user interaction, and graphical text manipulation while running in a Linux environment.
Key Features
• Fully compatible with OpenVMS SMG$ APIs.
• Supports advanced screen management functions, including viewport manipulation, text rendering, and cursor control.
• Allows seamless migration of OpenVMS applications that rely on SMG$ routines for terminal-based interfaces.
• Integrates with VX/RT to provide full OpenVMS screen management capabilities on x86 and ARM Linux.
• Preserves OpenVMS display handling and user interaction logic without requiring major application modifications.
VX/SMG$ Callable Routines
| SMG$ API |
Function |
| SMG$ALLOW_ESCAPE | Allow escape sequences |
| SMG$BEGIN_DISPLAY_UPDATE | Begin screen update |
| SMG$BEGIN_PASTEBOARD_UPDATE | Begin pasteboard update |
| SMG$CANCEL_INPUT | Cancel input request |
| SMG$CANCEL_TYPE_AHEAD | Cancels buffered keyboard input before processing |
| SMG$CHANGE_PBD_CHARACTERISTICS | Change pasteboard settings |
| SMG$CHANGE_RENDITION | Change text style |
| SMG$CHANGE_VIEWPORT | Modify viewport settings |
| SMG$CHANGE_VIRTUAL_DISPLAY | Modify virtual display |
| SMG$CHECK_FOR_OCCLUSION | Check for display occlusion |
| SMG$CONTROL_MODE | Set control mode |
| SMG$COPY_PASTEBOARD | Copies contents of a pasteboard for display |
| SMG$COPY_VIRTUAL_DISPLAY | Copy virtual display |
| SMG$CREATE_MENU | Create a menu |
| SMG$CREATE_PASTEBOARD | Create a pasteboard |
| SMG$CREATE_VIEWPORT | Create a viewport |
| SMG$CREATE_VIRTUAL_DISPLAY | Create a virtual display |
| SMG$CREATE_VIRTUAL_KEYBOARD | Create a virtual keyboard |
| SMG$CURSOR_COLUMN | Get or set cursor column |
| SMG$CURSOR_ROW | Get or set cursor row |
| SMG$DELETE_CHARS | Delete characters from display |
| SMG$DELETE_LINE | Delete a line from display |
| SMG$DELETE_MENU | Delete a menu |
| SMG$DELETE_PASTEBOARD | Delete a pasteboard |
| SMG$DELETE_VIEWPORT | Delete a viewport |
| SMG$DELETE_VIRTUAL_DISPLAY | Delete a virtual display |
| SMG$DELETE_VIRTUAL_KEYBOARD | Delete a virtual keyboard |
| SMG$DRAW_CHAR | Draw a character on display |
| SMG$DRAW_LINE | Draw a line on display |
| SMG$DRAW_RECTANGLE | Draw a rectangle on display |
| SMG$END_DISPLAY_UPDATE | End display update session |
| SMG$END_PASTEBOARD_UPDATE | End pasteboard update |
| SMG$ERASE_CHARS | Erase characters on display |
| SMG$ERASE_COLUMN | Erase a column on display |
| SMG$ERASE_DISPLAY | Erase the entire display |
| SMG$ERASE_LINE | Erase a line on display |
| SMG$ERASE_PASTEBOARD | Erase pasteboard content |
| SMG$FIND_CURSOR_DISPLAY | Find cursor position on display |
| SMG$FLUSH_BUFFER | Flush display buffer |
| SMG$FLUSH_DISPLAY_UPDATE | Flushes pending display updates |
| SMG$GET_BROADCAST_MESSAGE | Retrieve broadcast message |
| SMG$GET_CHAR_AT_PHYSICAL_CURSOR | Get character at cursor position |
| SMG$GET_DISPLAY_ATTR | Get display attributes |
| SMG$GET_KEYBOARD_ATTRIBUTES | Retrieves attributes of the keyboard device |
| SMG$GET_PASTEBOARD_ATTRIBUTES | Get pasteboard attributes |
| SMG$GET_PASTING_INFO | Retrieve pasting information |
| SMG$GET_TERM_DATA | Get terminal data |
| SMG$GET_VIEWPORT_CHAR | Get character from viewport |
| SMG$HOME_CURSOR | Move cursor to home position |
| SMG$INIT_TERM_TABLE | Initialize terminal table |
| SMG$INIT_TERM_TABLE_BY_TYPE | Init term table by type |
| SMG$INSERT_CHARS | Insert characters into display |
| SMG$INSERT_LINE | Insert a line into display |
| SMG$KEYCODE_TO_NAME | Convert keycode to name |
| SMG$LABEL_BORDER | Label viewport border |
| SMG$LIST_PASTING_ORDER | List pasting order |
| SMG$LOAD_VIRTUAL_DISPLAY | Load a virtual display |
| SMG$MOVE_TEXT | Move text in display |
| SMG$MOVE_VIRTUAL_DISPLAY | Move virtual display |
| SMG$NAME_TO_KEYCODE | Convert name to keycode |
| SMG$PASTE_VIRTUAL_DISPLAY | Paste virtual display |
| SMG$POP_VIRTUAL_DISPLAY | Pop virtual display stack |
| SMG$PUT_CHARS | Write characters to display |
| SMG$PUT_CHARS_HIGHWIDE | Write high/wide characters |
| SMG$PUT_CHARS_MULTI | Write multiple characters |
| SMG$PUT_CHARS_WIDE | Write wide characters |
| SMG$PUT_HELP_TEXT | Displays help text in a virtual display |
| SMG$PUT_LINE | Write a line to display |
| SMG$PUT_LINE_HIGHWIDE | Write high/wide line |
| SMG$PUT_LINE_WIDE | Write wide line |
| SMG$PUT_PASTEBOARD | Write pasteboard content |
| SMG$PUT_STATUS_LINE | Displays a status line on the screen |
| SMG$PUT_VIRTUAL_DISPLAY_ENCODED | Writes encoded text to a virtual display |
| SMG$PUT_WITH_SCROLL | Write with scrolling |
| SMG$READ_COMPOSED_LINE | Reads a full line with composition features |
| SMG$READ_FROM_DISPLAY | Read data from display |
| SMG$READ_KEYSTROKE | Read keystroke input |
| SMG$READ_STRING | Read a string input |
| SMG$REPAINT_LINE | Repaint a line on display |
| SMG$REPAINT_SCREEN | Repaint the entire screen |
| SMG$REPASTE_VIRTUAL_DISPLAY | Repaste virtual display |
| SMG$RESTORE_PHYSICAL_SCREEN | Restore physical screen |
| SMG$RETURN_CURSOR_POS | Return cursor position |
| SMG$RING_BELL | Ring terminal bell |
| SMG$SAVE_PHYSICAL_SCREEN | Save physical screen |
| SMG$SAVE_VIRTUAL_DISPLAY | Save virtual display |
| SMG$SCROLL_DISPLAY_AREA | Scroll display area |
| SMG$SCROLL_VIEWPORT | Scroll viewport |
| SMG$SELECT_FROM_MENU | Select item from menu |
| SMG$SET_CURSOR_ABS | Set cursor absolute position |
| SMG$SET_CURSOR_MODE | Set cursor display mode |
| SMG$SET_CURSOR_REL | Set cursor relative position |
| SMG$SET_DISPLAY_SCROLL_REGION | Set scrolling region |
| SMG$SET_KEYPAD_MODE | Set keypad input mode |
| SMG$SET_OUT_OF_BAND_ASTS | Configures out-of-band asynchronous system traps |
| SMG$SET_PHYSICAL_CURSOR | Set physical cursor |
| SMG$SET_TERM_CHARACTERISTICS | Set terminal attributes |
| SMG$SNAPSHOT | Captures the current state of the screen |
| SMG$UNPASTE_VIRTUAL_DISPLAY | Unpaste virtual display |
Why Use VX/SMG$?
• Preserves OpenVMS screen management workflows, enabling direct porting of applications.
• Provides full compatibility with OpenVMS SMG$ display handling functions.
• Supports key OpenVMS terminal and graphical text operations, ensuring accurate visual representation.
• Seamlessly integrates into the VX/RT ecosystem for OpenVMS compatibility on x86 and ARM Linux.
VX/SMG$ ensures that OpenVMS applications requiring SMG$ services can be migrated without major modifications, preserving productivity and minimizing development costs.
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