[TTF字体]提取TTF字体的轮廓(二)

一. TTF字体轮廓解析与绘制

1.1 数据提取

void CHYTTFCharacter::InitTTPOLY(){if(0 == m_pTTPOLYData)// GetGlyphOutline提取到的字体轮廓数据{return;}TTPOLYGONHEADER* pTTPOLYGONHEADER = 0;TTPOLYCURVE* pTTPOLYCURVE = 0;STTTPOLYGONHEADER* pSTTTPOLYGONHEADER = 0;STTTPOLYCURVE* pSTTTPOLYCURVE = 0;unsigned int nTTPOLYDataLen = 0;unsigned char* pTTPOLYData = m_pTTPOLYData;unsigned int nCURVELen = 0;unsigned char* pCURVE = 0;int nTemp = 0;while(nTTPOLYDataLen < m_nTTPOLYDataLen){pSTTTPOLYGONHEADER = new STTTPOLYGONHEADER;m_stTTPOLYGONHEADERVector.push_back(pSTTTPOLYGONHEADER);pTTPOLYGONHEADER = (TTPOLYGONHEADER*)pTTPOLYData;memcpy(&(pSTTTPOLYGONHEADER->m_TTPOLYGONHEADER), pTTPOLYGONHEADER, sizeof(TTPOLYGONHEADER));pCURVE = pTTPOLYData + sizeof(TTPOLYGONHEADER);nCURVELen = sizeof(TTPOLYGONHEADER);while(nCURVELen < pTTPOLYGONHEADER->cb){pTTPOLYCURVE = (TTPOLYCURVE*)pCURVE;pSTTTPOLYCURVE = new STTTPOLYCURVE;pSTTTPOLYCURVE->Init(pTTPOLYCURVE->wType, pTTPOLYCURVE->cpfx);pSTTTPOLYGONHEADER->m_stTTPOLYCURVEVector.push_back(pSTTTPOLYCURVE);memcpy(pSTTTPOLYCURVE->m_p_apfx, pCURVE + sizeof(TTPOLYCURVE) - sizeof(POINTFX), sizeof(POINTFX) * pTTPOLYCURVE->cpfx);nTemp = sizeof(TTPOLYCURVE) + sizeof(POINTFX) * (pTTPOLYCURVE->cpfx - 1);pCURVE += nTemp;nCURVELen += nTemp;}nTTPOLYDataLen += pTTPOLYGONHEADER->cb;pTTPOLYData += pTTPOLYGONHEADER->cb;}}

1.2 绘制

void CHYTTFCharacter::Draw(HDC hDC, int nOffsetX, int nOffsetY){int nXTemp, nYTemp, nXBegin, nYBegin;STTTPOLYGONHEADER* pSTTTPOLYGONHEADER = 0;STTTPOLYCURVE* pSTTTPOLYCURVE = 0;int nCountH = m_stTTPOLYGONHEADERVector.size();int nCountC = 0;int i = 0, j = 0, k = 0;for(i = 0; i < nCountH; ++i){pSTTTPOLYGONHEADER = m_stTTPOLYGONHEADERVector[i];nXBegin = nOffsetX + FIXEDToInt(pSTTTPOLYGONHEADER->m_TTPOLYGONHEADER.pfxStart.x);nYBegin = nOffsetY - FIXEDToInt(pSTTTPOLYGONHEADER->m_TTPOLYGONHEADER.pfxStart.y);::MoveToEx(hDC, nXBegin, nYBegin, NULL);nCountC = pSTTTPOLYGONHEADER->m_stTTPOLYCURVEVector.size();for(j = 0; j < nCountC; ++j){pSTTTPOLYCURVE = pSTTTPOLYGONHEADER->m_stTTPOLYCURVEVector[j];// 这里可以根具线条的类型做样条曲线的绘制, 这样字体会绘制的比较圆滑.***********注意注意*****************// 我这里直接使用直线连接, 有些地方可能绘制的比较粗糙.************************注意注意******************for(k = 0; k < pSTTTPOLYCURVE->m_cpfx; ++k){::LineTo(hDC, nOffsetX + FIXEDToInt(pSTTTPOLYCURVE->m_p_apfx[k].x), nOffsetY - FIXEDToInt(pSTTTPOLYCURVE->m_p_apfx[k].y));}}::LineTo(hDC, nXBegin, nYBegin);}}

1.3 调用

void CTestTypeDlg::PaintType(){CClientDC dc(this);HDC hDC = dc.GetSafeHdc();//创建字体CFont font;VERIFY(font.CreateFont(70, 0, 0, 0, FW_NORMAL, FALSE, FALSE, 0, ANSI_CHARSET,OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, DEFAULT_PITCH | FF_SWISS, "宋体"));CFont *pOldFont = dc.SelectObject(&font);// 定义并初始化变换矩阵MAT2 mat2;memset(&mat2, 0, sizeof(mat2));mat2.eM11.value = 1;mat2.eM22.value = 1;GLYPHMETRICS metrics;// 保存字符相关信息DWORD dwDataSize = 0;// 初始化字符数据缓冲区大小//……// 通过函数GetGlyphOutline()确定存储字符结构的空间//char nChar = 'A';wchar_t nChar = L'A';::TextOut(dc.m_hDC, 0, 0, "A", 1);//dwDataSize = pDC->GetGlyphOutline((UINT)nChar, GGO_NATIVE, &metrics, 0, NULL, &mat2);dwDataSize = ::GetGlyphOutlineW(dc.m_hDC, (UINT)nChar, GGO_NATIVE, &metrics, 0, NULL, &mat2);if ((dwDataSize != 0) && (dwDataSize != GDI_ERROR)){CHYTTFCharacter hyTTFCharacter;hyTTFCharacter.InitTTPOLY(dwDataSize);dwDataSize = ::GetGlyphOutlineW(dc.m_hDC, (UINT)nChar,GGO_NATIVE,&metrics, dwDataSize, hyTTFCharacter.m_pTTPOLYData, &mat2);hyTTFCharacter.InitTTPOLY();int nXOffset = 200;int nYOffset = 200;hyTTFCharacter.Draw(dc.m_hDC, nXOffset, nYOffset);}}

// 感觉封装的不是很好!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

1.4 网上的一些参考

http://blog.csdn.net/kingstar158/article/details/7257347

HDC hDC = pDC->GetSafeHdc();//创建字体CFont font;VERIFY(font.CreateFont(m_iFontHeight, 0, 0, 0,FW_NORMAL, FALSE, FALSE, 0, ANSI_CHARSET,OUT_DEFAULT_PRECIS,      CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, DEFAULT_PITCH | FF_SWISS,m_sFontFaceName));CFont *pOldFont = pDC->SelectObject(&font);//定义并初始化变换矩阵MAT2 mat2;memset(&mat2, 0, sizeof(mat2));mat2.eM11 = 1;mat2.eM22 = 1;GLYPHMETRICS metrics;    //保存字符相关信息DWORD dwDataSize = 0;//初始化字符数据缓冲区大小//……//通过函数GetGlyphOutline()确定存储字符结构的空间dwDataSize = pDC->GetGlyphOutline(nChar, GGO_NATIVE, &metrics, 0, NULL, &mat2);if ((dwDataSize != 0) && (dwDataSize != GDI_ERROR)){//创建保存字符数据缓冲区大小LPBYTE pPixels = new BYTE[dwDataSize];ASSERT( pPixels != NULL );TTPOLYGONHEADER *pHeader = (TTPOLYGONHEADER*)pPixels;dwDataSize = pDC->GetGlyphOutline(nChar,GGO_NATIVE,&metrics, dwDataSize, pPixels, &mat2);while(dwDataSize > 0){//计算字符轮廓的起点，转换坐标int xOld = MapFXY(pHeader->pfxStart.x);int yOld = MapFXY(pHeader->pfxStart.y);//根据TTF字体结构获取字符轮廓::MoveToEx(hDC,iXpos + xOld,iYpos - yOld,NULL);TTPOLYCURVE *pCurrentCurve = (TTPOLYCURVE*)(pHeader + 1);  int remainByte = pHeader->cb - sizeof(TTPOLYGONHEADER);while (remainByte > 0){CPoint lpPoint[1000];CPoint bezi[2];int index;for (index = 0; index < pCurrentCurve->cpfx; ++index){lpPoint[index].x = iXpos + MapFXY(pCurrentCurve->apfx[index].x);lpPoint[index].y = iYpos - MapFXY(pCurrentCurve->apfx[index].y);}switch (pCurrentCurve->wType){case TT_PRIM_LINE:case TT_PRIM_QSPLINE:for (index =0; index < pCurrentCurve->cpfx; index++){::LineTo(hDC,lpPoint[index].x,lpPoint[index].y);}break;default:MessageBox(_T("字体不支持"));break;}int count = sizeof(TTPOLYCURVE) + (pCurrentCurve->cpfx -1)*sizeof(POINTFX);pCurrentCurve = (TTPOLYCURVE*)((char*)pCurrentCurve  + count);remainByte -= count;}::LineTo(hDC,iXpos + xOld, iYpos - yOld);dwDataSize -= pHeader->cb;pHeader = (TTPOLYGONHEADER*)((char*)pHeader + pHeader->cb);}delete [] pPixels;}    }

二. 应用

        TTF字体是一种矢量字体. 好处就是可以随便放大, 缩小, 旋转等. 例如做"仿射变换". 而对于位图字体, 如果位图字体很大时, 做这些变换都是对位图上的每一个点来操作的, 效率会很低. 而如果对矢量数据操作的话, 要操作的点是有限的(比位图操作的点要少很多). 所以当你提取到了TTF字体的轮廓数据后, 你想干嘛都可以了(做一些文字的二维处理, 三维处理等都可以)..

       但有个问题: 当我提取了TTF字体的轮廓后, 我想填充这些轮廓, 不知怎么填充!!!!!!!!!! (暂时没深入了解,) Windows的API TextOut和DrawText是怎么填充的呢??????????