ACCESS

ACCESS

想在图片上写汉字 不想下载别的freetype了 参考了这边博客添加链接描述
但是编译的时候一直报错 显示

严重性 代码 说明 项目 文件 行 禁止显示状态
错误 C2872 “ACCESS_MASK”: 不明确的符号 carRecognize c:program files (x86)windows kits8.1includeumwinnt.h 9092

一查资料 原来是因为我项目中的其中一个头文件（.h）中使用了using namspace cv空间命名，但是我在源文件中又引用了系统头文件#include<windows.h>，这样就会导致了冲突。原因是他们俩中都有ACCESS_MASK定义，所以就会导致该变量不明确，就会报错。
网上提供的解决方式大多是这样的：
将所有的头文件（.h）中的using namespace cv都去掉，然后将需要用到的地方用cv::代替。然后将using namespace cv放入到cpp文件中，在cpp文件中不会导致冲突。
这个方法太麻烦了。

解决方法

将putText.h 中的#include<windows.h>注释掉 放在putText.cpp中 然后把putText.h 中对GetStringSize函数的声明也注释掉 ，这样就不会报错了。代码见下：

putText.h

#ifndef PUTTEXT_H_
#define PUTTEXT_H_
//#include <windows.h>#include <string>
#include <opencv2/opencv.hpp>//using namespace cv;//void GetStringSize(HDC hDC, const char* str, int* w, int* h);
void putTextZH(cv::Mat &dst, const char* str, cv::Point org, cv:: Scalar color, int fontSize,const char *fn = "Arial", bool italic = false, bool underline = false);#endif // PUTTEXT_H_

putText.cpp

#include <windows.h>
#include "putText.h"using namespace cv;
void GetStringSize(HDC hDC, const char* str, int* w, int* h)
{SIZE size;GetTextExtentPoint32A(hDC, str, strlen(str), &size);if (w != 0) *w = ;if (h != 0) *h = ;
}void putTextZH(Mat &dst, const char* str, Point org, Scalar color, int fontSize, const char* fn, bool italic, bool underline)
{CV_Assert(dst.data != 0 && (dst.channels() == 1 || dst.channels() == 3));int x, y, r, b;if (org.x > ls || org.y > ws) return;x = org.x < 0 ? -org.x : 0;y = org.y < 0 ? -org.y : 0;LOGFONTA lf;lf.lfHeight = -fontSize;lf.lfWidth = 0;lf.lfEscapement = 0;lf.lfOrientation = 0;lf.lfWeight = 5;lf.lfItalic = italic;   //斜体lf.lfUnderline = underline; //下划线lf.lfStrikeOut = 0;lf.lfCharSet = DEFAULT_CHARSET;lf.lfOutPrecision = 0;lf.lfClipPrecision = 0;lf.lfQuality = PROOF_QUALITY;lf.lfPitchAndFamily = 0;strcpy_s(lf.lfFaceName, fn);HFONT hf = CreateFontIndirectA(&lf);HDC hDC = CreateCompatibleDC(0);HFONT hOldFont = (HFONT)SelectObject(hDC, hf);int strBaseW = 0, strBaseH = 0;int singleRow = 0;char buf[1 << 12];strcpy_s(buf, str);char *bufT[1 << 12];  // 这个用于分隔字符串后剩余的字符，可能会超出。//处理多行{int nnh = 0;int cw, ch;const char* ln = strtok_s(buf, "n", bufT);while (ln != 0){GetStringSize(hDC, ln, &cw, &ch);strBaseW = max(strBaseW, cw);strBaseH = max(strBaseH, ch);ln = strtok_s(0, "n", bufT);nnh++;}singleRow = strBaseH;strBaseH *= nnh;}if (org.x + strBaseW < 0 || org.y + strBaseH < 0){SelectObject(hDC, hOldFont);DeleteObject(hf);DeleteObject(hDC);return;}r = org.x + strBaseW > ls ? ls - org.x - 1 : strBaseW - 1;b = org.y + strBaseH > ws ? ws - org.y - 1 : strBaseH - 1;org.x = org.x < 0 ? 0 : org.x;org.y = org.y < 0 ? 0 : org.y;BITMAPINFO bmp = { 0 };BITMAPINFOHEADER& bih = bmp.bmiHeader;int strDrawLineStep = strBaseW * 3 % 4 == 0 ? strBaseW * 3 : (strBaseW * 3 + 4 - ((strBaseW * 3) % 4));bih.biSize = sizeof(BITMAPINFOHEADER);bih.biWidth = strBaseW;bih.biHeight = strBaseH;bih.biPlanes = 1;bih.biBitCount = 24;bih.biCompression = BI_RGB;bih.biSizeImage = strBaseH * strDrawLineStep;bih.biClrUsed = 0;bih.biClrImportant = 0;void* pDibData = 0;HBITMAP hBmp = CreateDIBSection(hDC, &bmp, DIB_RGB_COLORS, &pDibData, 0, 0);CV_Assert(pDibData != 0);HBITMAP hOldBmp = (HBITMAP)SelectObject(hDC, hBmp);//color.val[2], color.val[1], color.val[0]SetTextColor(hDC, RGB(255, 255, 255));SetBkColor(hDC, 0);//SetStretchBltMode(hDC, COLORONCOLOR);strcpy_s(buf, str);const char* ln = strtok_s(buf, "n", bufT);int outTextY = 0;while (ln != 0){TextOutA(hDC, 0, outTextY, ln, strlen(ln));outTextY += singleRow;ln = strtok_s(0, "n", bufT);}uchar* dstData = (uchar*)dst.data;int dstStep = dst.step / sizeof(dstData[0]);unsigned char* pImg = (unsigned char*)dst.data + org.x * dst.channels() + org.y * dstStep;unsigned char* pStr = (unsigned char*)pDibData + x * 3;for (int tty = y; tty <= b; ++tty){unsigned char* subImg = pImg + (tty - y) * dstStep;unsigned char* subStr = pStr + (strBaseH - tty - 1) * strDrawLineStep;for (int ttx = x; ttx <= r; ++ttx){for (int n = 0; n < dst.channels(); ++n) {double vtxt = subStr[n] / 255.0;int cvv = vtxt * color.val[n] + (1 - vtxt) * subImg[n];subImg[n] = cvv > 255 ? 255 : (cvv < 0 ? 0 : cvv);}subStr += 3;subImg += dst.channels();}}SelectObject(hDC, hOldBmp);SelectObject(hDC, hOldFont);DeleteObject(hf);DeleteObject(hBmp);DeleteDC(hDC);
}