SYSCALLS/GM 1985/04/30
Include files:
C: /sys/ins/gm.ins.c
Fortran: /sys/ins/gm.ins.ftn
Pascal: /sys/ins/gm.ins.pas
Procedures and Functions:
GM_$ABLOCK_ASSIGN_DISPLAY (aclass_id, ablock_id, status)
Assigns an attribute block (by number) to an attribute class,
for the entire display.
GM_$ABLOCK_ASSIGN_VIEWPORT (aclass_id, viewport_id, ablock_id, status)
Assigns an attribute block (by number) to an attribute class, for
one viewport.
GM_$ABLOCK_COPY (source_ablock_id, destination_ablock_id, status)
Copies all attributes from one existing attribute block to another.
GM_$ABLOCK_CREATE (source_ablock_id, ablock_id, status)
Creates an attribute block and initializes it
equivalent to an existing block.
GM_$ABLOCK_DELETE (ablock_id, status)
Deletes an existing attribute block and releases its
identification number.
GM_$ABLOCK_INQ_ASSIGN_DISPLAY (aclass_id, ablock_id, status)
Returns the current attribute block number assigned to a particular
attribute class for the display.
GM_$ABLOCK_INQ_ASSIGN_VIEWPORT (aclass_id, viewport_id, ablock_id, status)
Returns the current attribute block number assigned to a particular
attribute class for one viewport.
GM_$ABLOCK_INQ_DRAW_RASTER_OP (ablock_id, raster_op, status)
Returns the raster operation code for drawing lines for the specified
attribute block.
GM_$ABLOCK_INQ_DRAW_STYLE (ablock_id, style, repeat_factor, pattern,
pattern_length, status)
Returns the line style set for the specified attribute block.
GM_$ABLOCK_INQ_DRAW_VALUE (ablock_id, value, status)
Returns the value for drawing lines set for the specified
attribute block.
GM_$ABLOCK_INQ_FILL_BACKGROUND_VALUE (ablock_id, value, status)
Returns the background value for filling areas in the specified
attribute block.
GM_$ABLOCK_INQ_FILL_PATTERN (ablock_id, scale, size, pattern, status)
Returns the pattern set for filling areas for the specified
attribute block.
GM_$ABLOCK_INQ_FILL_VALUE (ablock_id, value, status)
Returns the value set for filling areas for the
specified attribute block.
GM_$ABLOCK_INQ_FONT_FAMILY (ablock_id, font_family_id, status)
Returns the font family identification number set for the specified
attribute block.
GM_$ABLOCK_INQ_PLANE_MASK (ablock_id, change, mask, status)
Returns the value of the plane mask set for the
specified attribute block.
GM_$ABLOCK_INQ_TEXT_BACKGROUND_VALUE (ablock_id, value, status)
Returns the text background value set for the specified
attribute block.
GM_$ABLOCK_INQ_TEXT_SIZE (ablock_id, size, status)
Returns the size of text set for the specified attribute block.
GM_$ABLOCK_INQ_TEXT_VALUE (ablock_id, value, status)
Returns the value for writing text for
the specified attribute block.
GM_$ABLOCK_SET_DRAW_RASTER_OP (ablock_id, raster_op, status)
Changes the raster operation code for drawing
lines for this attribute block.
GM_$ABLOCK_SET_DRAW_STYLE (ablock_id, style, repeat_factor, pattern,
pattern_length, status)
Changes the value of the line style in this attribute block.
GM_$ABLOCK_SET_DRAW_VALUE (ablock_id, value, status)
Changes the value for drawing lines in this attribute block.
GM_$ABLOCK_SET_FILL_BACKGROUND_VALUE (ablock_id, value, status)
Changes the background value for filling areas in this
attribute block.
GM_$ABLOCK_SET_FILL_PATTERN (ablock_id, scale, size, pattern, status)
Changes the fill pattern in this attribute block.
GM_$ABLOCK_SET_FILL_VALUE (ablock_id, value, status)
Changes the value for filling areas in this attribute block.
GM_$ABLOCK_SET_FONT_FAMILY (ablock_id, font_family_id, status)
Changes the font family in this attribute block.
GM_$ABLOCK_SET_PLANE_MASK (ablock_id, change, mask, status)
Changes the value of the plane mask in this attribute block.
GM_$ABLOCK_SET_TEXT_BACKGROUND_VALUE (ablock_id, value,status)
Changes the background value for text in this attriabute block.
GM_$ABLOCK_SET_TEXT_SIZE (ablock_id, size, status)
Changes the size of text in this attribute block.
GM_$ABLOCK_SET_TEXT_VALUE (ablock_id, value, status)
Changes the value for writing text set for this attribute block.
GM_$ACLASS (aclass_id, status)
Inserts a command into the current segment: change to a
different attribute class.
GM_$CIRCLE_16 (center, radius, fill, status)
GM_$CIRCLE_32 (center, radius, fill, status)
GM_$CIRCLE_REAL (center, radius, fill, status)
Inserts a command into the current segment: draw a circle.
GM_$COMMAND_DELETE (status)
Deletes the current command.
GM_$COORD_BITMAP_TO_SEG_2D (bitmap_position, segment_position,status)
Converts bitmap coordinates to segment coordinates.
GM_$COORD_PIXEL_TO_SEG_2D (rotate, translate, pixel_position,
segment_position, status)
Converts GPR bitmap coordinates used in within-GPR
mode to segment coordinates, using a specified transformation.
GM_$COORD_SEG_TO_BITMAP_2D (segment_position, bitmap_position, status)
Converts segment coordinates to bitmap coordinates.
GM_$COORD_SEG_TO_PIXEL_2D (rotate, translate, segment_position,
pixel_position, status)
Converts within-GPR segment coordinates to GPR bitmap coordinates,
using a specified transformation.
GM_$CURSOR_INQ_ACTIVE (active, status)
Returns the status of the cursor: displayed or not displayed.
GM_$CURSOR_INQ_PATTERN (style, pattern_size, pattern, origin, status)
Returns the type, pattern, and origin of the cursor.
GM_$CURSOR_INQ_POSITION (bitmap_position, status)
Returns the position of the cursor.
GM_$CURSOR_SET_ACTIVE (active, status)
Specifies whether or not the cursor is displayed.
GM_$CURSOR_SET_PATTERN (style, pattern_size, pattern, origin, status)
Specifies a cursor pattern, type, and origin.
GM_$CURSOR_SET_POSITION (bitmap_position, status)
Moves the cursor on the screen.
GM_$CURVE_2D16 (curve_type, n_points, point_array, n_parameters,
parameter_array, status)
GM_$CURVE_2D32 (curve_type, n_points, point_array, n_parameters,
parameter_array, status)
GM_$CURVE_2DREAL (curve_type, n_points, point_array, n_parameters,
parameter_array, status)
Inserts a command into the current segment: draw a curve.
GM_$DATA_COERCE_INQ_REAL (data_type, status)
Returns the data type to which real coordinates are converted.
GM_$DATA_COERCE_SET_REAL (data_type, status)
Specifies the data type to which subsequent real coordinates
are converted.
GM_$DISPLAY_FILE (status)
Displays the entire current file in the current viewport.
GM_$DISPLAY_FILE_PART (bounds, status)
Displays part of the current file in the current viewport.
GM_$DISPLAY_INQ_COLOR_MAP (start_index, n_entries, values, status)
Returns the values in the display color map.
GM_$DISPLAY_REFRESH (status)
Redisplays all uninhibited viewports of the display.
GM_$DISPLAY_SEGMENT (segment_id, status)
Displays the specified segment (and all called segments) in
the current viewport.
GM_$DISPLAY_SEGMENT_GPR_2D (segment_id, rotate, translate, status)
In within-GPR mode, allows you to display a segment within a
GPR bitmap.
GM_$DISPLAY_SEGMENT_PART (segment_id, bounds, status)
Displays part of the specified segment (and all called segments)
in the current viewport.
GM_$DISPLAY_SET_COLOR_MAP (start_index, n_entries, values, status)
Changes values in the display color map.
GM_$DRAW_RASTER_OP (raster_op, status)
Inserts a command into the current segment: change
the logical raster operations to be performed when drawing.
GM_$DRAW_STYLE (style, repeat_factor, pattern, pattern_length, status)
Inserts a command into the current segment: set the
line style (solid, dotted).
GM_$DRAW_VALUE (value, status)
Inserts a command into the current segment: set
the value used when drawing lines.
GM_$FILE_CLOSE (save, status)
Closes the current file, saving revisions or not.
GM_$FILE_COMPACT(name, name_length, status)
Creates a new compacted GM file.
GM_$FILE_CREATE (name, name_length, access, concurrency, file_id, status)
Creates a new graphics metafile and makes it the current file.
GM_$FILE_INQ_PRIMARY_SEGMENT (segment_id, status)
Returns the segment number assumed to be the start of the current
file.
GM_$FILE_OPEN (name, name_length, access, concurrency, file_id, status)
Reopens an existing file and makes it the current file.
GM_$FILE_SELECT (file_id, status)
Makes the specified file the current file.
GM_$FILE_SET_PRIMARY_SEGMENT (segment_id, status)
Changes the segment number assumed to be the start of the current
file.
GM_$FILL_BACKGROUND_VALUE (value, status)
Inserts a command into the current segment: set the value used for
pixels not in the fill pattern when filling an area.
GM_$FILL_PATTERN (scale, size, pattern, status)
Inserts a command into the current segment:
set the pattern used for the interior of filled areas.
GM_$FILL_VALUE (value, status)
Inserts a command into the current segment: set the value used when
filling an area.
GM_$FONT_FAMILY (font_family_id, status)
Inserts a command into the current segment: set
the font family used when writing text.
GM_$FONT_FAMILY_EXCLUDE (font_family_id, status)
Undoes the inclusion of a font family.
GM_$FONT_FAMILY_INCLUDE (pathname, pathname_length, font_type,
font_family_id, status)
Specifies a font family to use in this metafile.
GM_$FONT_FAMILY_INQ_ID (pathname, pathname_length, font_type,
font_family_id, status)
Returns the identification number a previously included font family.
GM_$FONT_FAMILY_RENAME (font_family_id, pathname, pathname_length,
font_type, status)
Changes the font family file corresponding
to this font family identification.
GM_$INIT (display_mode, unit, size, n_planes, status)
Initializes the graphics metafile package and opens the display.
GM_$INPUT_DISABLE (event_type, status)
Disables an input event type.
GM_$INPUT_ENABLE (event_type, key_set, status)
Enables an input event type.
GM_$INPUT_EVENT_WAIT (wait, event_type, event_data, bitmap_position,
viewport_id, segment_position, status)
Checks for or waits until an occurrence of an enabled input event.
GM_$INQ_ACLASS (aclass_id, status)
Returns the value stored for the current (GM_$ACLASS) command.
GM_$INQ_BITMAP_SIZE (size, planes, status)
Returns the size of the GM bitmap in pixels.
GM_$INQ_CIRCLE_16 (center, radius, fill, status)
GM_$INQ_CIRCLE_32 (center, radius, fill, status)
GM_$INQ_CIRCLE_REAL (center, radius, fill, status)
Returns the values stored for the current (GM_$CIRCLE) command.
GM_$INQ_COMMAND_TYPE (command_type, data_type, status)
Returns the command type and the data type of the current command
in the current segment.
GM_$INQ_CONFIG (configuration, status)
Returns the current configuration of the display device.
GM_$INQ_CURVE_2D16 (curve_type, n_points, point_array, n_parameters,
parameter_array, status)
GM_$INQ_CURVE_2D32 (curve_type, n_points, point_array, n_parameters,
parameter_array, status)
GM_$INQ_CURVE_2DREAL (curve_type, n_points, point_array, n_parameters,
parameter_array, status)
Returns the values stored for the current (GM_$CURVE) command.
GM_$INQ_DRAW_RASTER_OP (raster_op, status)
Returns the values stored for the current (GM_$DRAW_RASTER_OP)
command.
GM_$INQ_DRAW_STYLE (style, repeat_factor, pattern, pattern_length, status)
Returns the values stored for the current (GM_$DRAW_STYLE) command.
GM_$INQ_DRAW_VALUE (value, status)
Returns the value stored for the current (GM_$DRAW_VALUE) command.
GM_$INQ_FILL_BACKGROUND_VALUE (value, status)
Returns the value stored for the current (GM_$FILL_BACKGROUND_VALUE)
command.
GM_$INQ_FILL_PATTERN (scale, size, pattern, status)
Returns the value stored for the current (GM_$FILL_PATTERN) command.
GM_$INQ_FILL_VALUE (value, status)
Returns the value stored for the current (GM_$FILL_VALUE) command.
GM_$INQ_FONT_FAMILY (font_family_id, status)
Returns the value stored for the current (GM_$FONT_FAMILY) command.
GM_$INQ_INSTANCE_SCALE_2D16 (segment_id, scale, translate, status)
GM_$INQ_INSTANCE_SCALE_2D32 (segment_id, scale, translate, status)
GM_$INQ_INSTANCE_SCALE_2DREAL (segment_id, scale, translate, status)
Returns the value stored for the current (GM_$INSTANCE_SCALE_2D)
command.
GM_$INQ_INSTANCE_TRANSFORM_2D[16,32,REAL] (segment_id, rotate, translate,
status)
Returns the value stored for the current (GM_$INSTANCE_TRANSLATE) command.
GM_$INQ_INSTANCE_TRANSLATE_2D16 (segment_id, translate, status)
GM_$INQ_INSTANCE_TRANSLATE_2D32 (segment_id, translate, status)
GM_$INQ_INSTANCE_TRANSLATE_2DREAL (segment_id, translate, status)
Returns the value stored for the current (GM_$INSTANCE_TRANSLATE_2D)
command.
GM_$INQ_PLANE_MASK (mask, status)
Returns the value stored for the current (GM_$PLANE_MASK) command.
GM_$INQ_POLYLINE_2D16 (n_points, point_array, close, fill, status)
GM_$INQ_POLYLINE_2D32 (n_points, point_array, close, fill, status)
GM_$INQ_POLYLINE_2DREAL (n_points, point_array, close, fill, status)
Returns the values stored for the current (GM_$POLYLINE_2D) command.
GM_$INQ_PRIMITIVE_2D16 (primitive_type, n_points, point_array,
n_parameters, parameter_array, status)
GM_$INQ_PRIMITIVE_2D32 (primitive_type, n_points, point_array,
n_parameters, parameter_array, status)
GM_$INQ_PRIMITIVE_2DREAL (primitive_type, n_points, point_array,
n_parameters, parameter_array, status)
Returns the values stored for the current (GM_$PRIMITIVE) command.
GM_$INQ_RECTANGLE_16 (point1, point2, fill, status)
GM_$INQ_RECTANGLE_32 (point1, point2, fill, status)
GM_$INQ_RECTANGLE_REAL (point1, point2, fill, status)
Returns the values stored for the current (GM_$RECTANGLE) command.
GM_$INQ_TAG (string, string_length, status)
Returns the value stored for the current (GM_$TAG) command.
GM_$INQ_TEXT_2D[16,32,REAL] (point, rotate, string, string_length, status)
Returns the value stored for the current (GM_$TEXT_2D[16,32,REAL])
command.
GM_$INQ_TEXT_BACKGROUND_VALUE (value, status)
Returns the value stored for the current (GM_$TEXT_BACKGROUND_VALUE)
command.
GM_$INQ_TEXT_SIZE (size, status)
Returns the value stored for the current (GM_$TEXT_SIZE) command.
GM_$INQ_TEXT_VALUE (value, status)
Returns the value stored for the current (GM_$TEXT_VALUE) command.
GM_$INSTANCE_SCALE_2D16 (segment_id, scale, translate, status)
GM_$INSTANCE_SCALE_2D32 (segment_id, scale, translate, status)
GM_$INSTANCE_SCALE_2DREAL (segment_id, scale, translate, status)
Inserts a command into the current segment: instance the specified
segment with the specified scale and translation parameters.
GM_$INSTANCE_TRANSFORM_2D16 (segment_id, rotate, translate, status)
GM_$INSTANCE_TRANSFORM_2D32 (segment_id, rotate, translate, status)
GM_$INSTANCE_TRANSFORM_2DREAL (segment_id, rotate, translate, status)
Inserts a command to instance the specified segment with the
specified rotation and translation applied.
GM_$INSTANCE_TRANSLATE_2D16 (segment_id, translate, status)
GM_$INSTANCE_TRANSLATE_2D32 (segment_id, translate, status)
GM_$INSTANCE_TRANSLATE_2DREAL (segment_id, translate, status)
Inserts a command into the current segment: instance the identified
segment with the specified translation.
GM_$MODELCMD_INQ_MODE (gm_modelcmd_mode, status)
Returns the values stored for the current (GM_$MODELCMD_SET_MODE)
command.
GM_$MODELCMD_SET_MODE (gm_modelcmd_mode, status)
Sets the modeling command mode.
GM_$PICK_COMMAND (search_rule, status)
Within the current segment, selects a command which contains a
selected point on the display.
GM_$PICK_HIGHLIGHT_COMMAND (highlight, time, status)
Highlights the current command on the display.
GM_$PICK_HIGHLIGHT_SEGMENT (highlight, time, status)
Within the current file, highlights the specified segment.
GM_$PICK_INQ_CENTER (center, status)
Returns the center of the pick aperture.
GM_$PICK_INQ_LIST (max_length, length, list, status);
Returns the current list of picked segments.
GM_$PICK_INQ_MASK (mask, status)
Returns the value of the mask used for segment pickable
values during pick segment operations.
GM_$PICK_INQ_THRESHOLD (threshold, status)
Returns the value of the threshold used for segment
pickable values during pick segment operations.
GM_$PICK_SEGMENT (search_rule, segment_id, n_instances, bounds, status)
Selects a segment which contains a specified point on the display.
GM_$PICK_SET_CENTER (center, status)
Changes the center of the pick aperture.
GM_$PICK_SET_MASK (mask, status)
Changes the value of the mask used for segment
pickable values during pick segment operations.
GM_$PICK_SET_SIZE (size, status)
Specifies the size of the pick aperture.
GM_$PICK_SET_THRESHOLD (threshold, status)
Returns the value of the threshold used in
pick search operations in the current segment.
GM_$PICK_TRANSFORM_POINT (vsegment_position, psegment_position, status)
Transforms the coordinates of a point from the coordinate system of
the viewport segment to the coordinate system of the picked segment.
GM_$PLANE_MASK (mask, status)
Inserts a command into the current segment: change the plane mask.
GM_$POLYLINE_2D16 (n_points, point_array, close, fill, status)
GM_$POLYLINE_2D32 (n_points, point_array, close, fill, status)
GM_$POLYLINE_2DREAL (n_points, point_array, close, fill, status)
Inserts a command into the current segment: draw a linked set of
line segments.
GM_$PRIMITIVE_2D16 (primitive_type, n_points, point_array, n_parameters,
parameter_array, status)
GM_$PRIMITIVE_2D32 (primitive_type, n_points, point_array, n_parameters,
parameter_array, status)
GM_$PRIMITIVE_2DREAL (primitive_type, n_points, point_array, n_parameters,
parameter_array, status)
Inserts a command into the current segment: draw a primitive.
GM_$PRIMITIVE_DISPLAY_2D (primitive_type, display_procedure_ptr, status)
Assigns the specified user-defined routine to the specified
user-defined primitive type number.
GM_$PRINT_FILE (file_name, file_name_length, size, invert, print_style,
bpi, status)
Converts the current metafile to the specified file for subsequent
printing on a hard-copy device.
GM_$PRINT_FILE_PART (bounds, file_name, file_name_length, size, invert,
print_style, bpi, status)
Converts part of the current metafile to the specified
file for subsequent printing on a hard-copy device.
GM_$RECTANGLE_16 (point1, point2, fill, status)
GM_$RECTANGLE_32 (point1, point2, fill, status)
GM_$RECTANGLE_REAL (point1, point2, fill, status)
Inserts a command into the current segment : draw a rectangle with
sides parallel to the x and y axes.
GM_$REFRESH_SET_ENTRY (refresh_procedure_ptr, status)
Specifies a user-defined routine to be called when the display is
refreshed as a result of a DM refresh window or POP command.
GM_$REPLACE_INQ_FLAG (yes_no, status)
Returns the current value of the replace flag (Obsolete). New
programs use GM_$MODELCMD_INQ_MODE.
GM_$REPLACE_SET_FLAG (yes_no, status)
Sets or clears a flag which causes subsequent commands to replace
the current command rather than being inserted after it (Obsolete).
New programs use GM_$MODELCMD_SET_MODE.
GM_$SEGMENT_CLOSE (save, status)
Closes the current segment, saving revisions or not.
GM_$SEGMENT_COPY (segment_id, status)
Copies the entire contents of another segment into the current
segment.
GM_$SEGMENT_CREATE (name, name_length, segment_id, status)
Creates a new segment.
GM_$SEGMENT_DELETE (status)
Deletes the current segment.
GM_$SEGMENT_ERASE (status)
Deletes all commands in the current segment.
GM_$SEGMENT_INQ_COUNT (count, max_segid, status)
Returns the number of segments in this metafile and a segment number
guaranteed to be greater than or equal to the largest segment number.
GM_$SEGMENT_INQ_CURRENT (name, name_length, segment_id,
n_instances, status)
Returns the name, segment identification, and number of instances of
the current segment.
GM_$SEGMENT_INQ_ID (name, name_length, segment_id, n_instances, status)
Returns the segment identification and the number of instances of
the named segment.
GM_$SEGMENT_INQ_NAME (seg_id, name, name_length, n_instances, status)
Returns the name of the segment with the specified
segment identification number.
GM_$SEGMENT_INQ_PICKABLE (segment_id, pickable, status)
Returns the pickable value of the specified segment.
GM_$SEGMENT_INQ_TEMPORARY (segment_id, temporary, status)
Returns whether the specified segment is temporary or not.
GM_$SEGMENT_INQ_VISIBLE (segment_id, visible, status)
Returns the visible value of the specified segment.
GM_$SEGMENT_OPEN (segment_id, status)
Reopens an existing segment.
GM_$SEGMENT_RENAME (segment_id, name, name_length, status)
Renames an existing segment.
GM_$SEGMENT_SET_PICKABLE (segment_id, pickable, status)
Assigns a pickable value to the specified segment.
GM_$SEGMENT_SET_TEMPORARY (segment_id, temporary, status)
Makes the specified segment temporary or not. Temporary segments
are deleted when the file is closed.
GM_$SEGMENT_SET_VISIBLE (segment_id, visible, status)
Assigns a visible value to the specified segment.
GM_$TAG (string, string_length, status)
Inserts a comment into the current segment.
GM_$TAG_LOCATE (string, string_length, min, max, segment_id, status)
Looks for the specified tag in the specified range of segments and
returns the segment ID of the lowest numbered segment in which the
tag is found.
GM_$TERMINATE (status)
Terminates the graphics metafile package and closes the display.
GM_$TEXT_2D[16,32,REAL] (point, rotate, string, string_length, status)
Inserts a command into the current segment: write a text string.
GM_$TEXT_BACKGROUND_VALUE (value, status)
Inserts a command into the current segment: change the background
value used when writing text.
GM_$TEXT_SIZE (size, status)
Inserts a command into the current segment : use a different text
size from the same font family.
GM_$TEXT_VALUE (value, status)
Inserts a command into the current segment: set the value used
when writing text.
GM_$VIEWPORT_CLEAR (value, status)
Clears the current viewport.
GM_$VIEWPORT_CREATE (bounds, viewport_id, status)
Creates an additional viewport and makes it the current viewport.
GM_$VIEWPORT_DELETE (viewport_id, status)
Deletes a viewport.
GM_$VIEWPORT_INQ_BACKGROUND_VALUE (viewport_id, value, status)
Returns the pixel value used for the background of the specified
viewport.
GM_$VIEWPORT_INQ_BOUNDS (bounds, status)
Returns the bounds of the current viewport.
GM_$VIEWPORT_INQ_CURRENT (viewport_id, status)
Returns the number of the current viewport.
GM_$VIEWPORT_INQ_REFRESH_STATE (refresh_state, status)
Returns the refresh state of the current viewport.
GM_$VIEWPORT_MOVE (translate, status)
Translates the current viewport, carrying the view with it.
GM_$VIEWPORT_REFRESH (status)
Refreshes the current viewport.
GM_$VIEWPORT_SELECT (viewport_id, status)
Makes a viewport the current viewport.
GM_$VIEWPORT_SET_BACKGROUND_VALUE (viewport_id, value, status)
Sets the pixel value used for the background of the specified
viewport.
GM_$VIEWPORT_SET_BORDER_SIZE (border_unit, border_size, status)
Specifies the border size of the current viewport, in pixels or
fraction-of-bitmap coordinates.
GM_$VIEWPORT_SET_BOUNDS (bounds, status)
Changes the display bounds for the current viewport.
GM_$VIEWPORT_SET_REFRESH_STATE (refresh_state, status )
Sets the refresh state of the current viewport.
GM_$VIEW_SCALE (scale, point, status)
Scales the view under the current viewport, keeping
the specified point fixed.
GM_$VIEW_TRANSFORM (rotate, point, status)
Rotates the view under the current viewport, keeping the
specified point (in fraction-of-bitmap coordinates) fixed.
GM_$VIEW_TRANSFORM_RESET (status)
Resets the view tranformation to the form in which it was
initially displayed.
GM_$VIEW_TRANSLATE (translate, status)
Translates the view under the current viewport.
GM_$VISIBLE_INQ_MASK (mask, status)
Returns the value of the visible mask.
GM_$VISIBLE_INQ_THRESHOLD (threshold, status)
Returns the value of the visible threshold.
GM_$VISIBLE_SET_MASK (mask, status)
Sets the value of the visible mask.
GM_$VISIBLE_SET_THRESHOLD (threshold, status)
Sets the visible threshold.