BfxPixelOpPseudo Class Reference

#include <bfxpixop.h>

Inheritance diagram for BfxPixelOpPseudo:

List of all members.

Public Member Functions
	BfxPixelOpPseudo ()
	Default constructor for pixel op.
virtual	~BfxPixelOpPseudo ()
	Default destructor for pixel op.
virtual BOOL	Reset ()
	Resets all parameters associated with the cache.
virtual BOOL	SetBitmap (KernelBitmap *pKB, DWORD theCacheStateMask, DWORD theCacheValueMask, BOOL theDefaultValue)
	Class set up to use bitmap passed in.
virtual BOOL	IsInRegion (INT32 x, INT32 y)
virtual void	TranslateToRGB (DWORD Colour, KernelBitmap *pKB, INT32 *R, INT32 *G, INT32 *B)
	To get the R G B values corresponding to a memory entry.
virtual DWORD	ReadPixel (void *Image, INT32 p)
virtual void	WritePixel (void *Image, INT32 p, DWORD Value)
virtual BOOL	CheckMinimumArea (INT32 MinimumArea, INT32 InitialX, INT32 InitialY, BOOL *FoundRegion)
	Determines whether atleast (MinimumArea) pixels are within the region.
Protected Member Functions
BOOL	FloodSearch (INT32 x, INT32 y, INT32 MinimumArea, INT32 FloodArray[256][2], INT32 *FloodTop)
	Recursively flood fills an area until >=MinimumArea pixels are found.
Protected Attributes
INT32	Log2BPP
INT32	XShift
INT32	XMask
INT32	BPPMask
Private Member Functions
	CC_DECLARE_DYNCREATE (BfxPixelOpPseudo)

---

Detailed Description

Definition at line 296 of file bfxpixop.h.

---

Constructor & Destructor Documentation

BfxPixelOpPseudo::BfxPixelOpPseudo (   )

Default constructor for pixel op. Author: Alex_Bligh (Xara Group Ltd) <camelotdev@xara.com> Date: 14/03/95 Parameters: None  [INPUTS] Constructs  object [OUTPUTS] Returns: Nothing Errors: None yet See also: - Definition at line 688 of file bfxpixop.cpp. : BfxPixelOp() { BPP=8; }

BfxPixelOpPseudo::~BfxPixelOpPseudo (   )  [virtual]

Default destructor for pixel op. Author: Alex_Bligh (Xara Group Ltd) <camelotdev@xara.com> Date: 14/03/95 Parameters: None  [INPUTS] Constructs  object [OUTPUTS] Returns: Nothing Errors: Error3 if DeInit hasn't been called. See also: - Definition at line 708 of file bfxpixop.cpp. { }

---

Member Function Documentation

BfxPixelOpPseudo::CC_DECLARE_DYNCREATE (  BfxPixelOpPseudo   )  [private]

BOOL BfxPixelOpPseudo::CheckMinimumArea (  INT32  MinimumArea, INT32  InitialX, INT32  InitialY, BOOL *  FoundRegion )  [virtual]

Determines whether atleast (MinimumArea) pixels are within the region. Author: Alex_Bligh (Xara Group Ltd) <camelotdev@xara.com> Date: 17/1/95 Parameters: MinimumArea  = minimum area [INPUTS] FoundRegion  set as per whether it's found a region [OUTPUTS] Returns: TRUE on success, FALSE (& error set) on failure Errors: None yet Scope: Public See also: BfxPixelOpPseudo::CheckMinimumArea, TraceControl::FloodSearch FoundRegion is set according the the result. The search starts at InitialX/InitialY This call *must* be done immediately (yes, immediately) after the cache is cleared. If not you lose all your caching. Har har. Reimplemented from BfxPixelOp. Definition at line 1066 of file bfxpixop.cpp. { // This is a bodge currently *FoundRegion = FALSE; if (IsInRegion(InitialX, InitialY)) { if (MinimumArea>BFX_PSEUDOFLOODSIZE-1) MinimumArea=BFX_PSEUDOFLOODSIZE-1; INT32 FloodArray[BFX_PSEUDOFLOODSIZE][2]; INT32 FloodTop=0; if (!FloodSearch(InitialX, InitialY, MinimumArea, FloodArray, &FloodTop)) return FALSE; *FoundRegion = (FloodTop >= MinimumArea); for (INT32 n=0; n<FloodTop; n++) WriteOriginalPixel(FloodArray[n][0], FloodArray[n][1], Colour); } return TRUE; }

BOOL BfxPixelOpPseudo::FloodSearch (  INT32  x, INT32  y, INT32  MinimumArea, INT32  FloodArray[256][2], INT32 *  FloodTop )  [protected]

Recursively flood fills an area until >=MinimumArea pixels are found. Author: Alex_Bligh (Xara Group Ltd) <camelotdev@xara.com> Date: 17/1/95 Parameters: x  = start x [INPUTS] y = start y MinimumArea = minimum area None  [OUTPUTS] Returns: TRUE on success, FALSE (& error set) on failure Errors: None yet Scope: Public See also: BfxPixelOpPseudo::CheckMinimumArea, TraceControl::CheckMinimumArea ONLY TO BE USED FROM CheckMinimumArea *** Definition at line 1106 of file bfxpixop.cpp. { if (IsInRegion(x,y)) { WriteOriginalPixel(x, y, Colour^1); // make it out of the region FloodArray[*FloodTop][0]=x; FloodArray[(*FloodTop)++][1]=y; // save coordinate so we can restore value later if (*FloodTop>=MinimumArea) return TRUE; if (!FloodSearch(x-1, y-1, MinimumArea, FloodArray, FloodTop)) return FALSE; if (*FloodTop>=MinimumArea) return TRUE; if (!FloodSearch(x , y-1, MinimumArea, FloodArray, FloodTop)) return FALSE; if (*FloodTop>=MinimumArea) return TRUE; if (!FloodSearch(x+1, y-1, MinimumArea, FloodArray, FloodTop)) return FALSE; if (*FloodTop>=MinimumArea) return TRUE; if (!FloodSearch(x-1, y , MinimumArea, FloodArray, FloodTop)) return FALSE; if (*FloodTop>=MinimumArea) return TRUE; if (!FloodSearch(x+1, y , MinimumArea, FloodArray, FloodTop)) return FALSE; if (*FloodTop>=MinimumArea) return TRUE; if (!FloodSearch(x-1, y+1, MinimumArea, FloodArray, FloodTop)) return FALSE; if (*FloodTop>=MinimumArea) return TRUE; if (!FloodSearch(x , y+1, MinimumArea, FloodArray, FloodTop)) return FALSE; if (*FloodTop>=MinimumArea) return TRUE; if (!FloodSearch(x+1, y+1, MinimumArea, FloodArray, FloodTop)) return FALSE; } return TRUE; }

virtual BOOL BfxPixelOpPseudo::IsInRegion (  INT32  x, INT32  y )  [inline, virtual]

Reimplemented from BfxPixelOp. Definition at line 309 of file bfxpixop.h. { if (( (DWORD)x>=(DWORD)Width ) || ( (DWORD)y>=(DWORD)Height ) ) return DefaultValue; else return IsPixelReallyInRegion(x, y);};

virtual DWORD BfxPixelOpPseudo::ReadPixel (  void *  Image, INT32  p )  [inline, virtual]

Reimplemented from BfxPixelOp. Definition at line 315 of file bfxpixop.h. { if ( (((DWORD)p)>=Size)||!Image) { ERROR3("Out of range BfxPixOp::ReadPixel()"); return 0; } return (DWORD)(((((BYTE *) Image)[p>>XShift])>>((XMask-(p & XMask))<<Log2BPP))&BPPMask); };

BOOL BfxPixelOpPseudo::Reset (  void   )  [virtual]

Resets all parameters associated with the cache. Author: Alex_Bligh (Xara Group Ltd) <camelotdev@xara.com> Date: 14/03/95 Parameters: None  [INPUTS] Resets  all parameters associated with the cache [OUTPUTS] Returns: TRUE if succeeded, FALSE & error set if not Errors: Error 2 if init hasn't been called or GDraw fails Error 3 if windows and some other Oil layer are stangely mixed... Scope: Public See also: - Reimplemented from BfxPixelOp. Definition at line 729 of file bfxpixop.cpp. { return BfxPixelOp::Reset(); }

BOOL BfxPixelOpPseudo::SetBitmap (  KernelBitmap *  pKB, DWORD  theCacheStateMask, DWORD  theCacheValueMask, BOOL  theDefaultValue )  [virtual]

Class set up to use bitmap passed in. Author: Alex_Bligh (Xara Group Ltd) <camelotdev@xara.com> Date: 14/03/95 Parameters: pKB  = pointer to the bitmap [INPUTS] theCacheStateMask = bit mask used to show cache information theCacheValueMask = bit mask used to show cache value information theDefaultValue = BOOL value associated with pixels outside the bitmap None  [OUTPUTS] Returns: TRUE if succeeded, FALSE & error set if not Errors: Error 2 if init hasn't been called or GDraw fails Error 3 if windows and some other Oil layer are stangely mixed... Scope: Public See also: - Reimplemented from BfxPixelOp. Definition at line 758 of file bfxpixop.cpp. { Base = NULL; ERROR2IF( ((!pKB) || (pKB->ActualBitmap==NULL)) ,FALSE,"BfxALU can't find OIL bitmap"); ERROR3IF( (!(pKB->ActualBitmap->IsKindOf(CC_RUNTIME_CLASS(CWxBitmap)) )),"BfxALU Oil layer inconsistency"); BITMAPINFOHEADER * pBMI=&(((CWxBitmap *)(pKB->ActualBitmap))->BMInfo->bmiHeader); BPP=pBMI->biBitCount; ERROR2IF(BPP>8, FALSE,"Pseudo colour BMP not pseudo colour"); switch (BPP) { case 1 : Log2BPP=0; break; case 2 : Log2BPP=1; break; case 4 : Log2BPP=2; break; case 8 : Log2BPP=3; break; default: ERROR2(FALSE, "Invalid BPP field"); } if (!BfxPixelOp::SetBitmap(pKB, theCacheStateMask,theCacheValueMask, theDefaultValue)) return FALSE; BPPMask = (BPP==32)?0xFFFFFFFF:(1<<BPP)-1; XShift = 3-Log2BPP; XMask = (1<<XShift)-1; Size = (pBMI->biSizeImage<<3)>>Log2BPP; return TRUE; }

void BfxPixelOpPseudo::TranslateToRGB (  DWORD  Colour, KernelBitmap *  pKB, INT32 *  R, INT32 *  G, INT32 *  B )  [virtual]

To get the R G B values corresponding to a memory entry. Author: Alex_Bligh (Xara Group Ltd) <camelotdev@xara.com> Date: 14/03/95 Parameters: Colour  = the colour [INPUTS] R,G,B  = rd, green, blue components [OUTPUTS] Returns: None Errors: None Scope: Public See also: BfxPixelOpPseudo::IsInRegion() Reimplemented from BfxPixelOp. Definition at line 1016 of file bfxpixop.cpp. { RGBQUAD Col; if ((!pKB) || (pKB->ActualBitmap==NULL)) { ERROR3( "BfxALU can't find OIL bitmap"); return; } ERROR3IF( (!(pKB->ActualBitmap->IsKindOf(CC_RUNTIME_CLASS(CWxBitmap)) )),"BfxALU Oil layer inconsistency"); BITMAPINFOHEADER * pBMI=&(((CWxBitmap *)(pKB->ActualBitmap))->BMInfo->bmiHeader); if ( Colour >= pBMI->biClrUsed ) { ERROR3("Too large palette entry"); *R=*G=*B=0; return; } Col = ((RGBQUAD *)(pBMI+1/*pointer arith*/))[Colour]; *R = Col.rgbRed; *G = Col.rgbGreen; *B = Col.rgbBlue; return; };

virtual void BfxPixelOpPseudo::WritePixel (  void *  Image, INT32  p, DWORD  Value )  [inline, virtual]

Reimplemented from BfxPixelOp. Definition at line 325 of file bfxpixop.h. { if ( (((DWORD)p)>=Size)||!Image) { ERROR3("Out of range BfxPixOp::ReadPixel()"); return; } BYTE * thebyte = &(((BYTE *) Image)[p>>XShift]); INT32 shift = ((XMask-(p & XMask))<<Log2BPP); *thebyte = (BYTE)(((*thebyte) & ~(BPPMask<<shift)) | ((Value & BPPMask)<<shift)); return; };

---

Member Data Documentation

INT32 BfxPixelOpPseudo::BPPMask [protected]

Definition at line 349 of file bfxpixop.h.

INT32 BfxPixelOpPseudo::Log2BPP [protected]

Definition at line 346 of file bfxpixop.h.

INT32 BfxPixelOpPseudo::XMask [protected]

Definition at line 348 of file bfxpixop.h.

INT32 BfxPixelOpPseudo::XShift [protected]

Definition at line 347 of file bfxpixop.h.

---

The documentation for this class was generated from the following files:

• wxOil/bfxpixop.h (r1785/r1282)
• wxOil/bfxpixop.cpp (r1785/r1282)

---