High Resolution Graphics - Subroutine Descriptions

copyright Interactive Software Services Ltd. 2000

Group GG : General Graphics Routines

Name	Description
IGrGetPixel	Get a screen pixel value as a 24-bit integer
IGrGetPixelRGB	Get a screen pixel value as an (r,g,b) triplet
IGrInit	Re-initialise graphics output
IGrPause	Pause before clearing screen to start a new picture

 

Group GA : Graphics Area/Units

Name	Description
IGrArea	Define size of graphics area
IGrAreaClear	Clear the current graphics screen area
IGrUnits	Define plotting units to be used
IGrUnitsFromPixels	Convert to user-unit co-ordinate FROM a pixel co-ord
IGrUnitsToPixels	Convert from user-unit co-ordinate TO a pixel co-ord
IGrViewport	Define size of graphics viewport

 

Group GS : Graphics Style Selection

Name	Description
IGrColour	Select graphics colour using a colour name
IGrColourModel	Select 8-bit or 24-bit colour model
IGrColourN	Select graphics colour using a colour number
IGrFillPattern	Define fill pattern (solid/stippled/hatched)
IGrLineType	Select line type (solid, dots, dashes or dot/dash)
IGrLineWidth	Set line width
IGrPaletteHLS	Redefine colour palette using HLS colour scheme
IGrPaletteInit	Re-initialise colour palette to default values
IGrPaletteRGB	Redefine colour palette using RGB colour scheme
IGrPlotMode	Select plotting mode (normal/and/or/exclusive-or)

 

Group GD : Graphics Drawing/Movement Primitives

Name	Description
IGrArc	Draw/fill circular arc at an absolute position
IGrArcRel	Draw/fill circular arc at the current position
IGrArrow	Draw an arrow pointing to a specified position
IGrArrowJoin	Draw an arrow joining two points
IGrBlockCopy	Bit block copy
IGrBlockMove	Bit block move
IGrBorder	Draw border around current graphics area
IGrCircle	Draw/fill circle at an absolute position
IGrCircleRel	Draw/fill circle at the current position
IGrCurve	Draw smooth curve through set of absolute co-ords
IGrEllipse	Draw/fill an ellipse at an absolute position
IGrEllipseRel	Draw/fill an ellipse at the current position
IGrJoin	Draw line between two absolute plotting positions
IGrJoinRel	Draw line from absolute position to a relative pos
IGrLineTo	Draw line to a new absolute position
IGrLineToRel	Draw line to a new relative position
IGrMarker	Draw predefined marker at an absolute position
IGrMarkerRel	Draw predefined marker at the current position
IGrMoveTo	Move current plotting position to a new absolute pos
IGrMoveToRel	Move current plotting position to a new relative pos
IGrParallel	Draw/fill parallelogram given absolute co-ordinates
IGrParallelRel	Draw/fill parallelogram given height & width
IGrPoint	Draw a single point at new absolute position
IGrPointRel	Draw a single point at new relative position
IGrPolygonComplex	Draw/fill a complex (possibly intersecting) polygon
IGrPolygonGrad	Graduated colour polygon fill
IGrPolygonSimple	Draw/fill a simple non-intersecting polygon
IGrPolyLine	Draw a polyline through a set of absolute co-ordinates
IGrRectangle	Draw/fill rectangle given absolute co-ordinates
IGrRectangleRel	Draw/fill rectangle given height & width
IGrTrapezium	Draw/fill trapezium given absolute co-ordinates
IGrTrapeziumRel	Draw/fill trapezium given height & width
IGrTriangle	Draw/fill triangle given absolute co-ordinates
IGrTriangleRel	Draw/fill triangle given two relative co-ordinates

 

Group GC : Graphics Character Output Routines

Name	Description
IGrCharConvert	Convert character set definition file to binary format
IGrCharDirection	Select graphics text direction
IGrCharFont	Select hardware-specific font
IGrCharJustify	Select graphics text justification
IGrCharLength	Return relative length of string allowing for prop spacing
IGrCharOut	Output character string at an absolute (x,y) pos
IGrCharOutRel	Output character string at current plotting pos
IGrCharRotate	Select graphics text rotation angle
IGrCharSet	Select graphics character set to use for text output
IGrCharSize	Select graphics text size
IGrCharSlant	Select graphics text slant
IGrCharSpace	Specify relative space occupied by a proportional char
IGrCharSpacing	Select fixed or proportional spacing
IGrCharUnderline	Enable/disable text underlining

 

Group GH : Graphics Hardcopy/Export

Name	Description
IGrEndPage	Start a new page of graphical output
IGrHardColourToPen	Define colour-number to plotter-pen mapping
IGrHardCopy	Enable/disable graphics hardcopy output
IGrHardCopyOptions	Define hardcopy options (page size, position, etc.)
IGrHardCopyOptLoad	Load hardcopy options from a file
IGrHardCopyOptSave	Save hardcopy options to a file
IGrHardCopySelect	Select hardcopy driver
IGrHardCopySelFile	Select hardcopy driver & options from a file
IGrHardCopyTextFile	Print an ASCII text file
IGrPrintImage	Dump graphics area to printer/print file
IGrSaveImage	Save graphics area to disc as a bit image
IGrSaveImageData24	Save 24-bit raw bitmap data to a BMP/PCX file
IGrSaveImageData8	Save 8-bit raw bitmap data to a BMP/PCX file

 

Group GF : Graphics File Import

Name	Description
IGrFileInfo	Return information about a graphics file
IGrLoadImage	Load a bit image file into the graphics area
IGrLoadImageData	Load a bit image file into RGB data array
IGrReplay	Replay whole of a plotter output file to the screen
IGrReplayArea	Define area of graphics file to replay
IGrReplayOptions	Define options for IGrReplay

 

Group GI : Graphics Input Routines

Name	Description
IGrInputBox	Mark two corners of a rectangular area
IGrInputDevice	Select graphics input device (cursor keys/mouse/digitiser)
IGrInputLimits	Define limits of graphics input area
IGrInputLine	Mark two ends of a line
IGrInputOptions	Specify GIN mode options
IGrInputXY	Mark a single point

 

Group GP : Graphics Proximity Checks

Name	Description
IGrDistanceLine	Measure distance from a point to a line
IGrInsideCircle	Is a given point inside a given circle?
IGrInsideEllipse	Is a given point inside a given ellipse?
IGrInsidePolygon	Is a given point inside a given polygon?
IGrIntersectLine	Calculate point at which two lines intersect