www.pudn.com > 基于TWAIN接口程序.zip > DIB.cpp
#include "stdafx.h"
#include "math.h"
#include "DIB.h"
#define BIG_DISTANCE 10000000L
#define DIST(r1,g1,b1,r2,g2,b2) \
(long) (3L*(long)((r1)-(r2))*(long)((r1)-(r2)) + \
4L*(long)((g1)-(g2))*(long)((g1)-(g2)) + \
2L*(long)((b1)-(b2))*(long)((b1)-(b2)))
static unsigned char masktable[] = { 0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01 };
CDIB::CDIB(HANDLE hDib,int nBits)
{
m_pVoid = NULL;
m_pLinePtr = NULL;
m_bUseGamma=FALSE;
width=height=0;
if(hDib)
{
CreateFromHandle(hDib,nBits);
}
}
CDIB::~CDIB()
{
DestroyDIB();
}
void CDIB::DestroyDIB()
{
if(m_pVoid) free(m_pVoid);
m_pVoid = NULL;
if(m_pLinePtr) free(m_pLinePtr);
m_pLinePtr = NULL;
}
BOOL CDIB::Create(int width,int height,int bits)
{
/*
Free existing image
*/
DestroyDIB();
// ASSERT(bits == 24 || bits == 8);
BITMAPINFOHEADER bmInfo;
memset(&bmInfo,0,sizeof(BITMAPINFOHEADER));
bmInfo.biSize = sizeof(BITMAPINFOHEADER);
bmInfo.biWidth = width;
bmInfo.biHeight = height;
bmInfo.biPlanes = 1;
bmInfo.biBitCount = bits;
bmInfo.biCompression = BI_RGB;
return Create(bmInfo);
}
BOOL CDIB::Create(BITMAPINFOHEADER& bmInfo)
{
bytes = (bmInfo.biBitCount*bmInfo.biWidth)>>3;
height = bmInfo.biHeight;
width = bmInfo.biWidth;
// bmInfo.biHeight *= -1;
while(bytes%4) bytes++;
int size;
size = sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD)*GetPaletteSize(bmInfo) + bytes*height;
m_pVoid = (void *)malloc(size);
if(!m_pVoid) return FALSE;
m_pInfo = (PBITMAPINFO )m_pVoid;
memcpy((void *)&m_pInfo->bmiHeader,(void *)&bmInfo,sizeof(BITMAPINFOHEADER));
m_pRGB = (RGBQUAD *)((unsigned char *)m_pVoid + sizeof(BITMAPINFOHEADER)) ;
m_pBits = (unsigned char *)(m_pVoid) + sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD)*GetPaletteSize();
int i;
BYTE **ptr;
m_pLinePtr = (BYTE **)malloc(sizeof(BYTE *)*height);
if(!m_pLinePtr) return FALSE;
for(i=0,ptr=m_pLinePtr; i < height; i++,ptr++)
{
//*ptr = (int)(m_pBits)+(i*bytes);
//*ptr = (int)GetLinePtr(i);
*ptr = m_pBits + (height-i-1)*bytes;
}
m_nFlags = 0;
return TRUE;
}
void CDIB::SetPalette(unsigned char *palette)
{
int i,size;
RGBQUAD *rgb;
if(!palette) return;
size = GetPaletteSize();
for(i=0,rgb = m_pRGB; i < size; i++,rgb++,palette+=3)
{
if(m_bUseGamma)
{
rgb->rgbRed = Gamma[palette[0]];
rgb->rgbGreen = Gamma[palette[1]];
rgb->rgbBlue = Gamma[palette[2]];
}
else
{
rgb->rgbRed = palette[0];
rgb->rgbGreen = palette[1];
rgb->rgbBlue = palette[2];
}
rgb->rgbReserved = (BYTE)0;
}
}
void CDIB::SetPalette(RGBQUAD *pRGB)
{
int size;
if(!pRGB) return;
size = GetPaletteSize();
memcpy(m_pRGB,pRGB,size*sizeof(RGBQUAD));
}
int CDIB::GetPaletteSize()
{
return GetPaletteSize(m_pInfo->bmiHeader);
}
int CDIB::GetPaletteSize(BITMAPINFOHEADER& bmInfo)
{
switch(bmInfo.biBitCount)
{
case 1:
return 2;
case 4:
return 16;
case 8:
return 256;
default:
return 0;
}
}
void CDIB::SetPixel(int x,int y,COLORREF color)
{
unsigned char *ptr;
ASSERT(x >= 0 && y >=0);
ASSERT(x < width && y < height);
// ptr = m_pBits + (y*bytes) + x * 3;
ptr = (unsigned char *)m_pLinePtr[y];
ptr += x*3;
*ptr++ = (unsigned char)GetBValue(color);
*ptr++ = (unsigned char)GetGValue(color);
*ptr++ = (unsigned char)GetRValue(color);
}
void CDIB::SetPixel8(int x,int y,unsigned char color)
{
unsigned char *ptr,*aptr;
ASSERT(x >= 0 && y >=0);
ASSERT(x < width && y < height);
// ptr = m_pBits + (y*bytes) + x ;
// ptr = (unsigned char *)m_pLinePtr[y] ;
ptr = GetLinePtr(y);
aptr = ptr;
ptr += x;
*ptr = color;
}
COLORREF CDIB::GetPixel(int x,int y)
{
unsigned char *ptr;
COLORREF color;
if(x < 0 || y < 0) return 0;
if(x >= width || y >= height) return 0;
// ptr = m_pBits + (y*bytes) + x * 3;
ptr = GetLinePtr(y);
ptr += (x*3);
color = RGB(*(ptr+2),*(ptr+1),*ptr);
return color;
}
CBitmap *CDIB::GetTempBitmap(CDC& dc)
{
HBITMAP hBitmap;
CBitmap *temp;
ASSERT(m_pVoid != NULL);
hBitmap = CreateDIBitmap(dc.m_hDC,
(PBITMAPINFOHEADER)m_pInfo,
CBM_INIT,
(const void *)m_pBits,
m_pInfo,
DIB_RGB_COLORS);
if(hBitmap == NULL) return NULL;
temp = CBitmap::FromHandle(hBitmap);
return temp;
}
CBitmap *CDIB::GetBitmap(CDC& dc)
{
HBITMAP hBitmap;
CBitmap *temp;
ASSERT(m_pVoid != NULL);
hBitmap = CreateDIBitmap(dc.m_hDC,
(PBITMAPINFOHEADER)m_pInfo,
CBM_INIT,
(const void *)m_pBits,
m_pInfo,
DIB_RGB_COLORS);
if(hBitmap == NULL) return NULL;
temp = CBitmap::FromHandle(hBitmap);
if(temp)
{
BITMAP bmp;
LPVOID lpVoid;
temp->GetBitmap(&bmp);
lpVoid = malloc(bmp.bmWidthBytes*bmp.bmHeight);
if(!lpVoid) return NULL;
temp->GetBitmapBits(bmp.bmWidthBytes*bmp.bmHeight,lpVoid);
CBitmap *newBmp = new CBitmap;
newBmp->CreateBitmapIndirect(&bmp);
newBmp->SetBitmapBits(bmp.bmWidthBytes*bmp.bmHeight,lpVoid);
free(lpVoid);
return newBmp;
}
else return NULL;
}
void CDIB::CopyLine(int source,int dest)
{
unsigned char *src,*dst;
ASSERT(source <= height && source >= 0);
ASSERT(dest <= height && dest >= 0);
if(source == dest) return;
src = GetLinePtr(source);
dst = GetLinePtr(dest);
memcpy(dst,src,bytes);
}
void CDIB::InitDIB(COLORREF color)
{
int i,j;
unsigned char *ptr;
if(m_pInfo->bmiHeader.biBitCount == 24)
{
unsigned char col[3];
col[0]=GetBValue(color);
col[1]=GetGValue(color);
col[2]=GetRValue(color);
for(i=0,ptr = m_pBits; i < height; i++)
{
ptr = m_pBits + i*bytes;
for(j=0; j < width ; j++,ptr+=3)
{
memcpy(ptr,col,3);
}
}
}
else
{
for(i=0,ptr = m_pBits; i < height; i++,ptr+=bytes)
{
memset(ptr,(BYTE)color,bytes);
}
}
}
void CDIB::BitBlt(HDC hDest,int nXDest,int nYDest,int nWidth,int nHeight,int xSrc,int ySrc)
{
SetDIBitsToDevice(hDest,nXDest,nYDest,nWidth,nHeight,xSrc,Height()-ySrc-nHeight,0,Height(),m_pBits,m_pInfo,DIB_RGB_COLORS);
}
void CDIB::StretchBlt(HDC hDest,int nXDest,int nYDest,int nDWidth,int nDHeight,int xSrc,int ySrc,int nSWidth,int nSHeight)
{
int err;
err = StretchDIBits(hDest,nXDest,nYDest,nDWidth,nDHeight,xSrc,ySrc,nSWidth,nSHeight,m_pBits,(CONST BITMAPINFO * )&m_pInfo->bmiHeader,DIB_RGB_COLORS,SRCCOPY);
}
void CDIB::ExpandBlt(int nXDest,int nYDest,int xRatio,int yRatio,CDIB& dibSrc,int xSrc,int ySrc,int nSWidth,int nSHeight)
{
SetPalette(dibSrc.m_pRGB);
nSWidth = xSrc+nSWidth > dibSrc.width ? dibSrc.width-xSrc : nSWidth;
nSHeight = ySrc+nSHeight > dibSrc.height? dibSrc.height-ySrc : nSHeight;
Expand(nXDest,nYDest,xRatio,yRatio,dibSrc,xSrc,ySrc,nSWidth,nSHeight);
}
void CDIB::Expand(int nXDest,int nYDest,int xRatio,int yRatio,CDIB& dibSrc,int xSrc,int ySrc,int nSWidth,int nSHeight)
{
int xNum,yNum,xErr,yErr;
int nDWidth,nDHeight;
nDWidth = nSWidth*xRatio;
nDHeight = nSHeight*yRatio;
nDWidth = nXDest+nDWidth > width ? width-nXDest : nDWidth ;
nDHeight = nYDest+nDHeight > height ? height-nYDest : nDHeight;
xNum = nDWidth/xRatio;
yNum = nDHeight/yRatio;
xErr = nDWidth%xRatio;
yErr = nDHeight%yRatio;
unsigned char *buffer,*srcPtr,*destPtr,*ptr;
int i,j,k;
buffer = (unsigned char *)malloc(nDWidth+20);
if(!buffer) return;
for(i=0; i < yNum; i++,ySrc++)
{
srcPtr = dibSrc.GetLinePtr(ySrc) + xSrc;
ptr = buffer;
for(j=0; j < xNum; j++,ptr+=xRatio)
{
memset(ptr,*(srcPtr+j),xRatio);
k=*(srcPtr+j);
}
memset(ptr,(unsigned char)k,xErr);
for(j=0; j < yRatio ; j++,nYDest++)
{
destPtr = GetLinePtr(nYDest) + nXDest;
memcpy(destPtr,buffer,nDWidth);
}
}
for(j=0; j < yErr; j++,nYDest++)
{
destPtr = GetLinePtr(nYDest) + nXDest;
memcpy(destPtr,buffer,nDWidth);
}
free(buffer);
}
void CDIB::StretchBlt(int nXDest,int nYDest,int nDWidth,int nDHeight,CDIB& dibSrc,int xSrc,int ySrc,int nSWidth,int nSHeight)
{
SetPalette(dibSrc.m_pRGB);
nDWidth = nXDest+nDWidth > width ? width-nXDest : nDWidth ;
nDHeight = nYDest+nDHeight > height ? height-nYDest : nDHeight;
nSWidth = xSrc+nSWidth > dibSrc.width ? dibSrc.width-xSrc : nSWidth;
nSHeight = ySrc+nSHeight > dibSrc.height? dibSrc.height-ySrc : nSHeight;
int xDiv,yDiv;
int xMod,yMod;
xDiv = nDWidth/nSWidth;
xMod = nDWidth%nSWidth;
yDiv = nDHeight/nSHeight;
yMod = nDHeight%nSHeight;
if(!xMod && !yMod && xDiv > 0 && yDiv > 0)
{
ExpandBlt(nXDest,nYDest,xDiv,yDiv,dibSrc,xSrc,ySrc,nSWidth,nSHeight);
return;
}
unsigned char *tempPtr,*srcPix,*destPix,*q;
tempPtr = (unsigned char *)malloc(nDWidth+20);
int i,j,k,l,x,y,m;
int xErr,yErr;
for(i=yErr=m=0; i < nSHeight; i++)
{
srcPix = dibSrc.GetLinePtr(i+ySrc) + xSrc;
q = tempPtr;
for(j=l=xErr=0; j < nSWidth; j++,srcPix++)
{
k = xDiv;
xErr += xMod;
if(xErr >= nSWidth)
{
k++;
xErr%=nSWidth;
}
x=0;
while(l < nDWidth && x < k)
{
*q++ = *srcPix;
l++;
x++;
}
}
while(l < nDWidth)
{
*q++=*srcPix;
l++;
}
k= yDiv;
yErr += yMod;
if(yErr >= nSHeight)
{
k++;
yErr%=nSHeight;
}
y=0;
while(m < nDHeight && y < k)
{
destPix = GetLinePtr(m+nYDest) + nXDest;
memcpy(destPix,tempPtr,nDWidth);
m++;
y++;
}
}
while(m < nDHeight )
{
destPix = GetLinePtr(m+nYDest) + nXDest;
memcpy(destPix,tempPtr,nDWidth);
m++;
}
free(tempPtr);
}
void CDIB::BitBlt(int nXDest,int nYDest,int nWidth,int nHeight,CDIB& dibSrc,int nSrcX,int nSrcY,BYTE *colors)
{
SetPalette(dibSrc.m_pRGB);
if(nXDest < 0)
{
nSrcX -= nXDest;
nWidth += nXDest;
nXDest=0;
}
if(nYDest < 0)
{
nSrcY -= nYDest;
nHeight += nYDest;
nYDest=0;
}
if(nSrcX < 0)
{
nXDest -= nSrcX;
nWidth += nSrcX;
nSrcX=0;
}
if(nSrcY < 0)
{
nYDest -= nSrcY;
nHeight += nSrcY;
nSrcY=0;
}
nWidth = nXDest+nWidth > width ? width-nXDest : nWidth ;
nHeight = nYDest+nHeight > height ? height-nYDest : nHeight;
nWidth = nSrcX+nWidth > dibSrc.width ? dibSrc.width-nSrcX : nWidth;
nHeight = nSrcY+nHeight > dibSrc.height? dibSrc.height-nSrcY : nHeight;
nWidth = __max(0,nWidth);
nHeight = __max(0,nHeight);
int i,k,l,j;
unsigned char *srcPtr,*destPtr;
if(!colors)
{
for(i=0,k=nSrcY,l=nYDest; i < nHeight; i++,k++,l++)
{
if(k < 0 || l < 0)
{
continue;
}
else
{
srcPtr = dibSrc.GetLinePtr(k);
destPtr = GetLinePtr(l);
memcpy(destPtr+nXDest,srcPtr+nSrcX,nWidth);
}
}
}
else
{
for(i=0,k=nSrcY,l=nYDest; i < nHeight; i++,k++,l++)
{
if(k < 0 || l < 0)
{
continue;
}
else
{
srcPtr = dibSrc.GetLinePtr(k)+nXDest;
destPtr = GetLinePtr(l)+nSrcX;
for(j=0; j < nWidth; j++,srcPtr++,destPtr++)
{
if(colors[*srcPtr]) *destPtr=*srcPtr;
}
}
}
}
}
unsigned char *CDIB::GetLinePtr(int line)
{
/*unsigned char *ptr;
ptr = m_pBits + (height-line-1)*bytes;
return ptr;*/
return m_pLinePtr[line];
}
BOOL CDIB::CopyDIB(CDIB& dib)
{
if(Create(dib.m_pInfo->bmiHeader))
{
SetPalette(dib.m_pRGB);
memcpy(m_pBits,dib.m_pBits,height*bytes);
return TRUE;
}
return FALSE;
}
void CDIB::ReplaceColor(unsigned char oldColor,unsigned char newColor)
{
int i,j;
unsigned char *ptr;
for(i=0; i < height; i++)
{
ptr = GetLinePtr(i);
for(j=0; j < width; j++)
{
if(ptr[j] == oldColor) ptr[j] = newColor;
}
}
}
CDIB& CDIB::operator=(CDIB& dib)
{
CopyDIB(dib);
return *this;
}
HANDLE CDIB::GetDIBits(int nStartX,int nStartY,int nCx,int nCy)
{
if(nStartX == -1)
{
nStartX = nStartY=0;
nCx = width;
nCy = height;
CDIB dib;
dib.Create(nCx,nCy,8);
dib.BitBlt(0,0,nCx,nCy,*this,0,0);
dib.SetPalette(m_pRGB);
return dib.DIBHandle();
}
return DIBHandle();
}
DWORD CDIB::GetDIBSize()
{
return sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD)*GetPaletteSize() + bytes*height;
}
HANDLE CDIB::DIBHandle()
{
int nSize;
HANDLE hMem;
nSize = sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD)*GetPaletteSize() + bytes*height;
hMem = GlobalAlloc(GMEM_DDESHARE | GMEM_MOVEABLE,nSize);
if(hMem == NULL) return NULL;
UCHAR *lpVoid,*pBits;
LPBITMAPINFOHEADER pHead;
RGBQUAD *pRgb;
lpVoid = (UCHAR *)GlobalLock(hMem);
pHead = (LPBITMAPINFOHEADER )lpVoid;
memcpy(pHead,&m_pInfo->bmiHeader,sizeof(BITMAPINFOHEADER));
pRgb = (RGBQUAD *)(lpVoid + sizeof(BITMAPINFOHEADER) );
memcpy(pRgb,m_pRGB,sizeof(RGBQUAD)*GetPaletteSize());
pBits = lpVoid + sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD)*GetPaletteSize();
memcpy(pBits,m_pBits,height*bytes);
GlobalUnlock(lpVoid);
return hMem;
}
BOOL CDIB::CreateFromHandle(HANDLE hMem,int bits)
{
DestroyDIB();
UCHAR *lpVoid,*pBits;
LPBITMAPINFOHEADER pHead;
RGBQUAD *pRgb;
lpVoid = (UCHAR *)GlobalLock(hMem);
pHead = (LPBITMAPINFOHEADER )lpVoid;
width = pHead->biWidth;
height = pHead->biHeight;
m_nBits = pHead->biBitCount;
if(pHead->biCompression != BI_RGB)
{
GlobalUnlock(lpVoid);
return FALSE;
}
if(pHead->biBitCount >= 15)
{
if(pHead->biBitCount != 24)
{
GlobalUnlock(lpVoid);
return FALSE;
}
}
if(!Create(*pHead))
{
GlobalUnlock(lpVoid);
return FALSE;
}
pRgb = (RGBQUAD *)(lpVoid + sizeof(BITMAPINFOHEADER) );
memcpy(m_pRGB,pRgb,sizeof(RGBQUAD)*GetPaletteSize());
pBits = lpVoid + sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD)*GetPaletteSize();
memcpy(m_pBits,pBits,height*bytes);
GlobalUnlock(lpVoid);
return TRUE;
}
void CDIB::UseGamma(float fg,BOOL bUse)
{
m_bUseGamma = bUse;
m_fOldGamma = m_fGamma;
m_fGamma = fg;
CreateGammaCurve();
}
void CDIB::CreateGammaCurve()
{
int i;
for(i=0;i<256;++i)
{
Gamma[i]=(int)(255 * pow((double)i/255,m_fGamma) + (double)0.5);
}
}
void CDIB::GetPixel(UINT x,UINT y,int& pixel)
{
ASSERT(x < (UINT)Width());
ASSERT(y < (UINT)Height());
if(x >= (UINT)Width()) return;
if(y >= (UINT)Height()) return;
pixel=(GetLinePtr(y))[x];
}
BOOL CDIB::Make8Bit(CDIB& dib)
{
int nBits;
ASSERT(Width() == dib.Width());
ASSERT(Height() == dib.Height());
nBits = dib.GetBitCount();
switch(nBits)
{
case 1:
return SwitchFromOne(dib);
break;
case 4:
return SwitchFromFour(dib);
break;
case 8:
return SwitchPalette(dib);
break;
case 24:
return SwitchFrom24(dib);
break;
default:
return FALSE;
}
return FALSE;
}
/*
BOOL CDIB::SwitchFrom24(CDIB& dib)
{
int i,j,w,h;
unsigned char *sPtr,*dPtr;
w = Width();
h = Height();
memset(CachePtr,0,sizeof(CachePtr));
for(i=0; i < h; i++)
{
dPtr = GetLinePtr(i);
sPtr = dib.GetLinePtr(i);
for(j=0 ; j < w; j++,dPtr++,sPtr+=3)
{
*dPtr = ClosestColor((RGBQUAD *)sPtr);
}
}
return TRUE;
}
*/
BOOL CDIB::SwitchFromOne(CDIB& dib)
{
int i,n,j,w,h;
unsigned char *sPtr,*dPtr;
unsigned char cols[2];
w = Width();
h = Height();
memset(CachePtr,0,sizeof(CachePtr));
cols[0]=ClosestColor(dib.m_pRGB);
cols[1]=ClosestColor(dib.m_pRGB+1);
for(i=0; i < h; i++)
{
dPtr = GetLinePtr(i);
sPtr = dib.GetLinePtr(i);
for(j=0 ; j < w; j++,dPtr++)
{
if(!(sPtr[j>>3] & masktable[j&7])) *dPtr = cols[0];
else *dPtr = cols[1];
}
}
return TRUE;
}
BOOL CDIB::SwitchFromFour(CDIB& dib)
{
int i,n,j,w,h;
unsigned char *sPtr,*dPtr;
unsigned char cols[16];
w = Width();
h = Height();
memset(CachePtr,0,sizeof(CachePtr));
for(i=0; i < 16; i++)
{
cols[i]=ClosestColor(dib.m_pRGB+i);
}
for(i=0; i < h; i++)
{
dPtr = GetLinePtr(i);
sPtr = dib.GetLinePtr(i);
for(j=0 ; j < w; j++,dPtr++)
{
if(!(j&1)) n = (*sPtr & 0xf0)>>4;
else
{
n = *sPtr & 0x0f;
sPtr++;
}
*dPtr = cols[n];
}
}
return TRUE;
}
BOOL CDIB::SwitchPalette(CDIB& dib)
{
int i,j,w,h;
unsigned char *sPtr,*dPtr;
unsigned char cols[256];
w = Width();
h = Height();
memset(CachePtr,0,sizeof(CachePtr));
for(i=0; i < 256; i++)
{
cols[i]=ClosestColor(dib.m_pRGB+i);
}
for(i=0; i < h; i++)
{
dPtr = GetLinePtr(i);
sPtr = dib.GetLinePtr(i);
for(j=0 ; j < w; j++,sPtr++,dPtr++)
{
*dPtr = cols[*sPtr];
}
}
return TRUE;
}
int CDIB::ClosestColor(RGBQUAD *pRgb)
{
unsigned int dist=BIG_DISTANCE,i,d,c;
RGBQUAD *pQuad=m_pRGB;
int pSize=GetPaletteSize();
for(i=0; i < pSize;i++)
{
if(CachePtr[i])
{
if(!memcmp((void *)&CacheQuad[i],(void *)pRgb,3))
{
return i;
}
}
}
for(i=0; i < pSize; i++,pQuad++)
{
d = Distance(*pRgb,*pQuad);
if(!d)
{
CacheQuad[i]=*pRgb;
CachePtr[i]=1;
return i;
}
if(dist > d)
{
c = i;
dist = d;
}
}
CacheQuad[c]=*pRgb;
CachePtr[c]=1;
return c;
}
unsigned int CDIB::Distance(RGBQUAD& rgb1,RGBQUAD& rgb2)
{
unsigned int d;
d = 3*(unsigned)((rgb1.rgbRed)-(rgb2.rgbRed))*(unsigned)((rgb1.rgbRed)-(rgb2.rgbRed));
d += 4*(unsigned)((rgb1.rgbGreen)-(rgb2.rgbGreen))*(unsigned)((rgb1.rgbGreen)-(rgb2.rgbGreen)) ;
d += 2*(unsigned)((rgb1.rgbBlue)-(rgb2.rgbBlue))*(unsigned)((rgb1.rgbBlue)-(rgb2.rgbBlue));
return d;
}
BOOL CDIB::OpenDIB(CString& csFileName)
{
CFile file;
if(!file.Open(csFileName,CFile::modeRead | CFile::typeBinary))
{
return FALSE;
}
file.Close();
if(OpenBMP(csFileName)) return TRUE;
return FALSE;
}
BOOL CDIB::SaveDIB(CString& csFileName,BitmapType type)
{
CFile file;
if(!file.Open(csFileName,CFile::modeCreate | CFile::typeBinary))
{
return FALSE;
}
file.Close();
switch(type)
{
case BMP:
return SaveBMP(csFileName);
default:
return FALSE;
}
return FALSE;
}
BOOL CDIB::SaveBMP(CString& csFileName)
{
BITMAPFILEHEADER bFile;
CFile file;
if(!file.Open(csFileName,CFile::modeWrite | CFile::typeBinary))
{
return FALSE;
}
::ZeroMemory(&bFile,sizeof(bFile));
memcpy((void *)&bFile.bfType,"BM",2);
bFile.bfSize = GetDIBSize() + sizeof(bFile);
bFile.bfOffBits = sizeof(BITMAPINFOHEADER) + GetPaletteSize()*sizeof(RGBQUAD) + sizeof(BITMAPFILEHEADER);
file.Write(&bFile,sizeof(bFile));
file.Write(m_pVoid,GetDIBSize());
file.Close();
return TRUE;
}
BOOL CDIB::OpenBMP(CString& csFileName)
{
BITMAPFILEHEADER bFile;
BITMAPINFOHEADER head;
CFile file;
if(!file.Open(csFileName,CFile::modeRead | CFile::typeBinary))
{
return FALSE;
}
file.Read(&bFile,sizeof(bFile));
if(memcmp((void *)&bFile.bfType,"BM",2))
{
file.Close();
return FALSE;
}
file.Read(&head,sizeof(head));
if(!Create(head))
{
file.Close();
return FALSE;
}
file.Read(m_pRGB,sizeof(RGBQUAD)*GetPaletteSize());
file.Seek(bFile.bfOffBits,CFile::begin);
file.Read(m_pBits,height*bytes);
file.Close();
return TRUE;
}
int CDIB::CountColors()
{
ASSERT(GetBitCount()==8);
BYTE colors[256],*ptr;
int nNum=0,i,j,w,d;
w = Width();
d = Height();
memset(colors,0,256);
for(i=0; i < d; i++)
{
ptr = GetLinePtr(i);
for(j=0; j < w; j++,ptr++)
{
if(!colors[*ptr])
{
colors[*ptr]=1;
nNum++;
}
}
}
return nNum;
}
int CDIB::EnumColors(BYTE *array)
{
ASSERT(GetBitCount()==8);
BYTE *ptr;
int nNum=0,i,j,w,d;
w = Width();
d = Height();
memset(array,0,256);
for(i=0; i < d; i++)
{
ptr = GetLinePtr(i);
for(j=0; j < w; j++,ptr++)
{
if(!array[*ptr])
{
array[*ptr]=1;
nNum++;
}
}
}
return nNum;
}
COLORREF CDIB::PaletteColor(int nIndex)
{
ASSERT(nIndex < 256);
RGBQUAD *pRGB= m_pRGB+nIndex;
return RGB(pRGB->rgbRed,pRGB->rgbGreen,pRGB->rgbBlue);
}
BOOL CDIB::SwitchFrom24(CDIB& dib)
{
int i,j,w,h,c;
unsigned char *sPtr,*dPtr;
BYTE *index_ptr=NULL;
RGBQUAD rgb;
w = Width();
h = Height();
index_ptr = (BYTE *)malloc(0x7FFF+1);
if(!index_ptr) return FALSE;
memset(CachePtr,0,sizeof(CachePtr));
for(i=0; i <= 0x7FFF; i++)
{
rgb.rgbRed = (((i & 0x7C00)>>10) << 3) | 0x07;
rgb.rgbGreen = (((i & 0x3e0)>>5) << 3) | 0x07;
rgb.rgbBlue = ((i & 0x1F)<<3) | 0x07;
index_ptr[i] = ClosestColor(&rgb);
}
for(i=0; i < h; i++)
{
dPtr = GetLinePtr(i);
sPtr = dib.GetLinePtr(i);
for(j=0 ; j < w; j++,dPtr++,sPtr+=3)
{
c = (*sPtr >> 3) | ((*(sPtr+1) >> 3) << 5) | ((*(sPtr+2) >> 3) << 10);
*dPtr = index_ptr[c];
}
}
free(index_ptr);
return TRUE;
}