tRastPort

type tRastPort = record

  Layer: pLayer;

Pointer to Layer of Rastport

  BitMap: pBitMap;

Pointer to Bitmap data

  AreaPtrn: Pointer;

Area Fill pattern

  TmpRas: pTmpRas;

Temporary Rastport, needed for Area actions

  AreaInfo: pAreaInfo;

  GelsInfo: pGelsInfo;

  Mask: Byte;

Write mask for this raster

  FgPen: ShortInt;

Foreground pen for this raster

  BgPen: ShortInt;

Background pen for this raster

  AOlPen: ShortInt;

AreaFill outline pen

  DrawMode: ShortInt;

Drawing mode for fill, lines, and text (JAM1, JAM2, COMPLEMENT, INVERSVID)

  AreaPtSz: ShortInt;

2**n words for areafill pattern

  linpatcnt: ShortInt;

current line drawing pattern preshift

  dummy: ShortInt;

  Flags: Word;

Miscellaneous control bits (FRST_DOT, ONE_DOT, DBUFFER)

  LinePtrn: Word;

16 bits for textured lines

  cp_x: SmallInt;

Current x pen position

  cp_y: SmallInt;

Current y pen position

  minterms: array [0..7] of Byte;

  PenWidth: SmallInt;

  PenHeight: SmallInt;

  Font: pTextFont;

PTextFont current font Pointer

  AlgoStyle: Byte;

The algorithmically generated style

  TxFlags: Byte;

Text specific flags

  TxHeight: Word;

Text height

  TxWidth: Word;

Text nominal width

  TxBaseline: Word;

Text baseline

  TxSpacing: SmallInt;

Text spacing (per character)

  RP_User: Pointer;

  longreserved: array [0..1] of LongWord;

  wordreserved: array [0..6] of Word;

Used to be a node

  reserved: array [0..7] of Byte;

For future use

end;

BltBitMapRastPort

Blit from source bitmap to destination rastport.

BltMaskBitMapRastPort

Blit from source bitmap to destination rastport with masking of source image.

BltPattern

Using standard drawing rules for areafill, blit through a mask.

ClearEOL

Clear from current position to end of line.

ClearScreen

Clear from current position to end of RastPort.

ClipBlit

Calls BltBitMap() after accounting for windows

Draw

Draw a line between the current pen position and the new x,y position.

DrawEllipse

Draw an ellipse centered at cx,cy with vertical and horizontal radii of a,b respectively

DrawGList

Process the gel list, queueing VSprites, drawing Bobs.

EraseRect

Fill a defined rectangular area using the current BackFill hook.

Flood

Flood rastport like areafill.

GfxMove

Move graphics pen position.

InitRastPort

Initialize raster port structure

PolyDraw

Draw lines from table of (x,y) values.

ReadPixel

read the pen number value of the pixel at a specified x,y location within a certain RastPort.

WritePixel

Change the pen num of one specific pixel in a specified RastPort.

GfxText

Write text characters (no formatting).