// $Id: bshadow.h 751 2006-03-31 15:43:49Z alex $ /* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE ================================XARAHEADERSTART=========================== Xara LX, a vector drawing and manipulation program. Copyright (C) 1993-2006 Xara Group Ltd. Copyright on certain contributions may be held in joint with their respective authors. See AUTHORS file for details. LICENSE TO USE AND MODIFY SOFTWARE ---------------------------------- This file is part of Xara LX. Xara LX is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation. Xara LX and its component source files are distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Xara LX (see the file GPL in the root directory of the distribution); if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA ADDITIONAL RIGHTS ----------------- Conditional upon your continuing compliance with the GNU General Public License described above, Xara Group Ltd grants to you certain additional rights. The additional rights are to use, modify, and distribute the software together with the wxWidgets library, the wxXtra library, and the "CDraw" library and any other such library that any version of Xara LX relased by Xara Group Ltd requires in order to compile and execute, including the static linking of that library to XaraLX. In the case of the "CDraw" library, you may satisfy obligation under the GNU General Public License to provide source code by providing a binary copy of the library concerned and a copy of the license accompanying it. 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Xara Group Ltd, Gaddesden Place, Hemel Hempstead, HP2 6EX, UK. http://www.xara.com/ =================================XARAHEADEREND============================ */ #ifndef _BITMAPSHADOW_H_ #define _BITMAPSHADOW_H_ #include "bshadow2.h" #ifdef BUILDSHADOWS //const UINT32 MAX_SHADOW_BLUR = 100 ; // Maximum amount of blur //const UINT32 MAX_CONTOUR = 100 ; // Maximum contour pixel size. //const double MIN_BLUR_DIAMETER = 0.71; // Minimum blur diameter is sqrt(0.5), rounded up // a little to safely avoid boundary conditions. class ShadowBitmap : public CCObject { // CC_DECLARE_DYNCREATE(ShadowBitmap); public: ShadowBitmap(); ~ShadowBitmap(); BOOL CreateFilled(INT32 Width, INT32 Height, BYTE value, UINT32 Depth = 32); BOOL Create8BitBitmap(UINT32 * pBits, UINT32 Width, UINT32 Height); HRESULT Create(INT32 Width, INT32 Height, UINT32 Depth = 32); LPBYTE GetBytes() { return (LPBYTE)m_Bytes; } INT32 GetWidth() { return m_Width; } INT32 GetHeight() { return m_Height; } UINT32 GetDepth() { return m_Depth; } private: INT32 m_Width; INT32 m_Height; BYTE * m_Bytes; UINT32 m_Depth; } ; class CBitmapShadow : public ShadowBitmap { friend class NodeFeatherEffect; // CC_DECLARE_DYNCREATE(CBitmapShadow); public: enum { // MAX_ROW_OFFSETS = MAX_SHADOW_BLUR*2+1, // Maximum size of shadow mask. // TABLE_SIZE = 0x800 // Maximum lookup table size for shadow generation. } ; CBitmapShadow(); BOOL CreateShadow(const BOOL bIsWallShadow, const double dProjection, const double dTiltAngle, const double dBlurriness, const double dDarknessCoeff, const double dPositionX, const double dPositionY, UINT32* pForegroundBits, const CNativeSize ForegroundSize ); void GetShadowOffset(INT32* pOffsetX, INT32* pOffsetY) { *pOffsetX = m_OffsetX; *pOffsetY = m_OffsetY; } BOOL IsWallShadow(void) const { return m_bIsWallShadow; } double GetBlurriness(void) const { return m_dBlurriness; } double GetDarknessCoeff(void) const { return m_dDarknessCoeff; } private: BOOL MakeWallShadow (const UINT32* pForegroundBits, const CNativeSize ForegroundSize, const INT32 nXPosition, const INT32 nYPosition, const double fBlur, INT32 *pOffsetX, INT32 *pOffsetY, const double dDarknessCoeff = 1.0); BOOL MakeCastShadow (UINT32* pForegroundBits, const CNativeSize ForegroundSize, const double fBlur, const double dTiltAngle, const double dProjection, const double dDarknessCoeff = 1.0 ); BOOL m_bIsWallShadow; double m_dProjection; double m_dTiltAngle; double m_dBlurriness; double m_dDarknessCoeff; double m_dPositionX; double m_dPositionY; INT32 m_OffsetX; INT32 m_OffsetY; protected: ShadowBitmap* Tilt(BYTE* pSourceBits, const INT32 nSourceWidth, const INT32 nSourceHeight, const double dTiltDegrees); static bool ProjectShadow(BYTE* pSBitmap, BYTE* pDBitmap, UINT32 nWidth, UINT32 nSHeight, UINT32 nDHeight); // Karim 02/08/2000 // made this static so it can be accessed by the public static feathering // function. public: // Karim 08/08/2000 // Blur the source bitmap, storing the result in the destination bitmap. static void Blur8BppBitmap( LPBITMAPINFOHEADER pSrcBMIHeader, LPBYTE pSrcBits, LPBITMAPINFOHEADER pDestBMIHeader, LPBYTE pDestBits, const UINT32 DWordBitmapWidth, const double fBlur ); // Karim 17/08/2000 // Determine whether the resultant bitmap for this blur setting // will be offset up and right by half a pixel. static BOOL BlurringWillOffsetBitmap(double fBlurDiameter) { // bitmap will be offset if the blur diameter is even, // and is not smaller than the minimum blur diameter. return ( ((UINT32)(fBlurDiameter + 0.5) % 2 == 0) && !(fBlurDiameter < MIN_BLUR_DIAMETER) ); } static UINT32 GetWholePixelBlurDiameter(double fBlurDiameter) { double fNewBlur = fBlurDiameter / 2.0; if (fNewBlur > MAX_SHADOW_BLUR) fNewBlur = MAX_SHADOW_BLUR; return (UINT32)(2 * fNewBlur + 0.5); } static LPBITMAPINFO Feather8BppBitmap( const double fBlur, LPBITMAPINFO pSrcInfo, LPBYTE pSrcBits32, LPBYTE* pDestBits ) ; // // Gavin 24/11/2004 // // Contour the 32bpp source bitmap, putting the result into the 32bpp destination bitmap. // static bool ContourBitmap( const LPBITMAPINFO pSrcInfo32, const LPBYTE pSrcBits32, const double fContour, const BYTE uThreshold, LPBITMAPINFO* ppDestInfo32, LPBYTE* ppDestBits32, double* pfOffsetX, double* pfOffsetY ) ; // // Gavin 20/04/2005 // // Contour the 8bpp source bitmap, putting the result into the 8bpp destination bitmap. // static bool ContourBitmap( const LPBITMAPINFO pSrcInfo8, const LPBYTE pSrcBits8, const double fContour, const bool bInside, const BYTE uThreshold, LPBITMAPINFO* ppDestInfo8, LPBYTE* ppDestBits8, double* pfOffsetX, double* pfOffsetY ) ; protected: } ; #endif #endif //_BITMAPSHADOW_H_