a1200   NEWS   APPS   DOCS   ABOUT
a1200
----
a1200
----
Autodocs
 Libraries:
 graphics.library
  AddAnimOb
  AddBob
  AddFont
  AddVSprite
  AllocBitMap
  AllocDBufInfo
  AllocRaster
  AllocSpriteDataA
  AndRectRegion
  AndRegionRegion
  Animate
  AreaCircle
  AreaDraw
  AreaEllipse
  AreaEnd
  AreaMove
  AskFont
  AskSoftStyle
  AttachPalExtra
  AttemptLockLayerRom
  BestModeIDA
  BitMapScale
  BltBitMap
  BltBitMapRastPort
  BltClear
  BltMaskBitMapRastPort
  BltPattern
  BltTemplate
  CBump
  CEND
  CINIT
  CMOVE
  CWAIT
  CalcIVG
  ChangeExtSpriteA
  ChangeSprite
  ChangeVPBitMap
  ClearEOL
  ClearRectRegion
  ClearRegion
  ClearScreen
  ClipBlit
  CloseFont
  CloseMonitor
  CoerceMode
  CopySBitMap
  DisownBlitter
  DisposeRegion
  DoCollision
  Draw
  DrawEllipse
  DrawGList
  EraseRect
  ExtendFont
  FindColor
  FindDisplayInfo
  Flood
  FontExtent
  FreeBitMap
  FreeColorMap
  FreeCopList
  FreeCprList
  FreeDBufInfo
  FreeGBuffers
  FreeRaster
  FreeSprite
  FreeSpriteData
  FreeVPortCopLists
  GetAPen
  GetBPen
  GetBitMapAttr
  GetColorMap
  GetDisplayInfoData
  GetDrMd
  GetExtSpriteA
  GetGBuffers
  GetOPen
  GetRGB32
  GetRGB4
  GetRPAttrA
  GetSprite
  GetVPModeID
  GfxAssociate
  GfxFree
  GfxLookUp
  GfxNew
  InitArea
  InitBitMap
  InitGMasks
  InitGels
  InitMasks
  InitRastPort
  InitTmpRas
  InitVPort
  InitView
  LoadRGB32
  LoadRGB4
  LoadView
  LockLayerRom
  MakeVPort
  ModeNotAvailable
  Move
  MoveSprite
  MrgCop
  NewRegion
  NextDisplayInfo
  ObtainBestPenA
  ObtainPen
  OpenFont
  OpenMonitor
  OrRectRegion
  OrRegionRegion
  OwnBlitter
  PolyDraw
  QBSBlit
  QBlit
  ReadPixel
  ReadPixelArray8
  ReadPixelLine8
  RectFill
  ReleasePen
  RemBob
  RemFont
  RemIBob
  RemVSprite
  ScalerDiv
  ScrollRaster
  ScrollRasterBF
  ScrollVPort
  SetABPenDrMd
  SetAPen
  SetBPen
  SetChipRev
  SetCollision
  SetDrMd
  SetFont
  SetMaxPen
  SetOPen
  SetOutlinePen
  SetRGB32
  SetRGB32CM
  SetRGB4
  SetRGB4CM
  SetRPAttrA
  SetRast
  SetSoftStyle
  SetWriteMask
  SortGList
  StripFont
  SyncSBitMap
  Text
  TextExtent
  TextFit
  TextLength
  UnlockLayerRom
  VBeamPos
  VideoControl
  WaitBOVP
  WaitBlit
  WaitTOF
  WriteChunkyPixels
  WritePixel
  WritePixelArray8
  WritePixelLine8
  XorRectRegion
  XorRegionRegion
Include
GuruMeditation
Docs » Autodocs » graphics.library » AllocBitMap

NAME

	AllocBitMap -- Allocate a bitmap and attach bitplanes to it. (V39)

SYNOPSIS

	bitmap=AllocBitMap(sizex,sizey,depth, flags, friend_bitmap)
	                   d0    d1    d2     d3       a0
	struct BitMap *AllocBitMap(ULONG,ULONG,ULONG,ULONG, struct BitMap *);

FUNCTION

	Allocates and initializes a bitmap structure. Allocates and initializes
	bitplane data, and sets the bitmap's planes to point to it.

INPUTS

	sizex = the width (in pixels) desired for the bitmap data.
	sizey = the height (in pixels) desired.
	depth = the number of bitplanes deep for the allocation.
		Pixels with AT LEAST this many bits will be allocated.
	flags = BMF_CLEAR to specify that the allocated raster should be
	        filled with color 0.
	        BMF_DISPLAYABLE to specify that this bitmap data should
	        be allocated in such a manner that it can be displayed.
	        Displayable data has more severe alignment restrictions
	        than non-displayable data in some systems. 
	        BMF_INTERLEAVED tells graphics that you would like your
	        bitmap to be allocated with one large chunk of display
	        memory for all bitplanes. This minimizes color flashing
	        on deep displays. If there is not enough contiguous RAM
		for an interleaved bitmap, graphics.library will fall
		back to a non-interleaved one.
	        BMF_MINPLANES causes graphics to only allocate enough space
	        in the bitmap structure for "depth" plane pointers. This
		is for system use and should not be used by applications use
		as it is inefficient, and may waste memory.
	friend_bitmap = pointer to another bitmap, or NULL. If this pointer
	        is passed, then the bitmap data will be allocated in
	        the most efficient form for blitting to friend_bitmap.

BUGS

NOTES

	When allocating using a friend bitmap, it is not safe to assume
	anything about the structure of the bitmap data if that friend
	BitMap might not be a standard amiga bitmap (for instance, if
	the workbench is running on a non-amiga display device, its
	Screen->RastPort->BitMap won't be in standard amiga format.
	The only safe operations to perform on a non-standard BitMap are:
	        - blitting it to another bitmap, which must be either a standard
	          Amiga bitmap, or a friend of this bitmap.
	        - blitting from this bitmap to a friend bitmap or to a standard
	          Amiga bitmap.
	        - attaching it to a rastport and making rendering calls. 
	Good arguments to pass for the friend_bitmap are your window's
	RPort->BitMap, and your screen's RastPort->BitMap.
	Do NOT pass &(screenptr->BitMap)!
	BitMaps not allocated with BMF_DISPLAYABLE may not be used as
	Intuition Custom BitMaps or as RasInfo->BitMaps.  They may be blitted
	to a BMF_DISPLAYABLE BitMap, using one of the BltBitMap() family of
	functions.

SEE ALSO

FreeBitMap()

Comments

Name:
E-mail: Use this if you want a message if you get a response, will not be shown.
Comment:
Select correct short for:

Scoopex

AYS
SCX
AFL
CSL

Comments:
$VER: d0.se 1.14 Copyright © 2011-2024 Tobias Geijersson support at d0 dot se