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Clip.i
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1990-08-28
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{
Clip.i of PCQ Pascal
These are the types used for layer and clipping stuff.
}
{$I "Include:Graphics/GFX.i"}
{$I "Include:Exec/Semaphores.i"}
type
{ structures used by and constructed by windowlib.a }
{ understood by rom software }
ClipRect = Record
Next : ^ClipRect; { roms used to find next ClipRect }
prev : ^ClipRect; { ignored by roms, used by windowlib }
lobs : Address; { ignored by roms, used by windowlib (LayerPtr)}
BitMap : Address;
bounds : Rectangle; { set up by windowlib, used by roms }
_p1,
_p2 : ^ClipRect; { system reserved }
reserved : Integer; { system use }
Flags : Integer; { only exists in layer allocation }
end;
ClipRectPtr = ^ClipRect;
Layer = record
front,
back : ^Layer; { ignored by roms }
ClipRect : ClipRectPtr; { read by roms to find first cliprect }
rp : Address; { (RastPortPtr) ignored by roms, I hope }
bounds : Rectangle; { ignored by roms }
reserved : Array [0..3] of Byte;
priority : Short; { system use only }
Flags : Short; { obscured ?, Virtual BitMap? }
SuperBitMap : Address;
SuperClipRect : ClipRectPtr; { super bitmap cliprects if
VBitMap != 0}
{ else damage cliprect list for refresh }
Window : Address; { reserved for user interface use }
Scroll_X,
Scroll_Y : Short;
cr,
cr2,
crnew : ClipRectPtr; { used by dedice }
SuperSaveClipRects : ClipRectPtr; { preallocated cr's }
_cliprects : ClipRectPtr; { system use during refresh }
LayerInfo : Address; { points to head of the list }
Lock : SignalSemaphore;
reserved3 : Array [0..7] of Byte;
ClipRegion : Address;
saveClipRects : Address; { used to back out when in trouble}
reserved2 : Array [0..21] of Byte;
{ this must stay here }
DamageList : Address; { list of rectangles to refresh
through }
end;
LayerPtr = ^Layer;
const
{ internal cliprect flags }
CR_NEEDS_NO_CONCEALED_RASTERS = 1;
{ defines for code values for getcode }
ISLESSX = 1;
ISLESSY = 2;
ISGRTRX = 4;
ISGRTRY = 8;
Function AttemptLockLayerRom(layer : LayerPtr) : Boolean;
External;
Procedure CopySBit(layer : LayerPtr);
External;
Procedure LockLayerRom(layer : LayerPtr);
External;
Procedure SyncSBitMap(layer : LayerPtr);
External;
Procedure UnlockLayerRom(layer : LayerPtr);
External;