www.pudn.com > MyBloodVessel.rar > ximainfo.cpp

// ximainfo.cpp : main attributes 
/* 03/10/2004 v1.00 - Davide Pizzolato - www.xdp.it 
 * CxImage version 5.99c 17/Oct/2004 
 */ 
 
#include "ximage.h" 
 
//////////////////////////////////////////////////////////////////////////////// 
/** 
 * \return the color used for transparency, and/or for background color 
 */ 
RGBQUAD	CxImage::GetTransColor() 
{ 
	if (head.biBitCount<24 && info.nBkgndIndex != -1) return GetPaletteColor((BYTE)info.nBkgndIndex); 
	return info.nBkgndColor; 
} 
//////////////////////////////////////////////////////////////////////////////// 
/** 
 * Gets the index used for transparency. Returns -1 for no transparancy. 
 */ 
long CxImage::GetTransIndex() const 
{ 
	return info.nBkgndIndex; 
} 
//////////////////////////////////////////////////////////////////////////////// 
/** 
 * Sets the index used for transparency with 1, 4 and 8 bpp images. Set to -1 to remove the effect. 
 */ 
void CxImage::SetTransIndex(long idx) 
{ 
	info.nBkgndIndex = idx; 
} 
//////////////////////////////////////////////////////////////////////////////// 
/** 
 * Sets the color used for transparency with 24 bpp images. 
 * You must call SetTransIndex(0) to enable the effect, SetTransIndex(-1) to disable it. 
 */ 
void CxImage::SetTransColor(RGBQUAD rgb) 
{ 
	rgb.rgbReserved=0; 
	info.nBkgndColor = rgb; 
} 
//////////////////////////////////////////////////////////////////////////////// 
bool CxImage::IsTransparent() const 
{ 
	return info.nBkgndIndex>=0; //  
} 
//////////////////////////////////////////////////////////////////////////////// 
/** 
 * Returns true if the image has 256 colors or less. 
 */ 
bool CxImage::IsIndexed() const 
{ 
	return head.biClrUsed!=0; 
} 
//////////////////////////////////////////////////////////////////////////////// 
/** 
 * \return 1 = indexed, 2 = RGB, 4 = RGBA 
 */ 
BYTE CxImage::GetColorType() 
{ 
	BYTE b = (BYTE)((head.biBitCount>8) ? 2 /*COLORTYPE_COLOR*/ : 1 /*COLORTYPE_PALETTE*/); 
#if CXIMAGE_SUPPORT_ALPHA 
	if (AlphaIsValid()) b = 4 /*COLORTYPE_ALPHA*/; 
#endif //CXIMAGE_SUPPORT_ALPHA 
	return b; 
} 
//////////////////////////////////////////////////////////////////////////////// 
/** 
 * \return Resolution for TIFF, JPEG, PNG and BMP formats. 
 */ 
long CxImage::GetXDPI() const 
{ 
	return info.xDPI; 
} 
//////////////////////////////////////////////////////////////////////////////// 
/** 
 * \return Resolution for TIFF, JPEG, PNG and BMP formats. 
 */ 
long CxImage::GetYDPI() const 
{ 
	return info.yDPI; 
} 
//////////////////////////////////////////////////////////////////////////////// 
/** 
 * Set resolution for TIFF, JPEG, PNG and BMP formats. 
 */ 
void CxImage::SetXDPI(long dpi) 
{ 
	if (dpi<=0) dpi=96; 
	info.xDPI = dpi; 
	head.biXPelsPerMeter = (long) floor(dpi * 10000.0 / 254.0 + 0.5); 
} 
//////////////////////////////////////////////////////////////////////////////// 
/** 
 * Set resolution for TIFF, JPEG, PNG and BMP formats. 
 */ 
void CxImage::SetYDPI(long dpi) 
{ 
	if (dpi<=0) dpi=96; 
	info.yDPI = dpi; 
	head.biYPelsPerMeter = (long) floor(dpi * 10000.0 / 254.0 + 0.5); 
} 
//////////////////////////////////////////////////////////////////////////////// 
/** 
 * \sa SetFlags 
 */ 
DWORD CxImage::GetFlags() const 
{ 
	return info.dwFlags; 
} 
//////////////////////////////////////////////////////////////////////////////// 
/** 
 * Image flags, for future use 
 * \param flags 
 *  - 0x??00000 = reserved for 16 bit, CMYK, multilayer 
 *  - 0x00??0000 = blend modes 
 *  - 0x0000???? = layer id or user flags 
 * 
 * \param bLockReservedFlags protects the "reserved" and "blend modes" flags  
 */ 
void CxImage::SetFlags(DWORD flags, bool bLockReservedFlags) 
{ 
	if (bLockReservedFlags) info.dwFlags = flags & 0x0000ffff; 
	else info.dwFlags = flags; 
} 
//////////////////////////////////////////////////////////////////////////////// 
/** 
 * \sa SetCodecOption 
 */ 
DWORD CxImage::GetCodecOption(DWORD imagetype) 
{ 
	if (imagetype