标签：NULL bmiHeader bb 曲线 bi 生成 BMP ------------- bitmap
C生成曲线BMP| Id | Title | DateAdded | SourceUrl | PostType | Body | BlogId | Description | DateUpdated | IsMarkdown | EntryName | CreatedTime | IsActive | AutoDesc | AccessPermission |
| -------------| -------------| -------------| -------------| -------------| -------------| -------------| -------------| -------------| -------------| -------------| -------------| -------------| -------------| -------------|
| 16937991| C生成曲线BMP| 2022-11-30T11:53:00| | BlogPost|
C生成曲线BMP
http://zhidao.baidu.com/question/222913503.html
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http://topic.csdn.net/u/20120822/13/e52e7b2a-e151-4985-9aa7-934d9f38c8de.html
#include "stdafx.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include<Windows.h>
typedef unsigned char BYTE;
typedef unsigned short WORD;
typedef unsigned long DWORD;
typedef long LONG;
#pragma pack (2)
int SaveBitmapToFile(BITMAP *bitmap, LPCWSTR lpFileName,char *lpBuf) {
DWORD dwWritten;
BITMAPFILEHEADER bmfHdr;
BITMAPINFOHEADER bi;
HANDLE fh=NULL;
bi.biSize = sizeof(BITMAPINFOHEADER);
bi.biWidth= bitmap->bmWidth;
bi.biHeight = bitmap->bmHeight;
bi.biPlanes = 1;
bi.biBitCount = bitmap->bmBitsPixel*8;
bi.biCompression = BI_RGB;
bi.biSizeImage = 0;
bi.biXPelsPerMeter = 0;
bi.biYPelsPerMeter = 0;
bi.biClrUsed = 0;
bi.biClrImportant = 0;
fh = CreateFile(lpFileName, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN, NULL);
if (fh == INVALID_HANDLE_VALUE) return FALSE;
bmfHdr.bfType = 0x4D42; // "BM"
bmfHdr.bfSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER)+bitmap->bmWidth*bitmap->bmHeight*bitmap->bmBitsPixel;
bmfHdr.bfReserved1 = 0;
bmfHdr.bfReserved2 = 0;
bmfHdr.bfOffBits = (DWORD) sizeof(BITMAPFILEHEADER) + (DWORD)sizeof(BITMAPINFOHEADER);
WriteFile(fh, (LPSTR)&bmfHdr, sizeof(BITMAPFILEHEADER), &dwWritten, NULL);
WriteFile(fh, ( char *)&bi,sizeof (BITMAPINFOHEADER), &dwWritten, NULL);
WriteFile(fh, ( char *)lpBuf,bitmap->bmWidth*bitmap->bmHeight*bitmap->bmBitsPixel, &dwWritten, NULL);
FlushFileBuffers(fh);
CloseHandle(fh);
return true;
}
int GetBitmapFromScreen(LPCWSTR lpFileName) {
char *lpBuf;
HBITMAP hBitmap,hOld ;
HDC hDC,hcDC;
BITMAP bb;
BITMAPINFO b;
HANDLE hp,fh=NULL;
DWORD dwX,dwY;
dwX=GetSystemMetrics(SM_CXSCREEN);
dwY=GetSystemMetrics(SM_CYSCREEN);
hDC=GetDC(NULL);
hcDC=CreateCompatibleDC(hDC);
hBitmap=CreateCompatibleBitmap(hDC,dwX,dwY);
hOld=(HBITMAP)SelectObject(hcDC,hBitmap);
BitBlt(hcDC,0, 0,dwX,dwY, hDC, 0, 0, SRCCOPY);
bb.bmWidth=dwX;
bb.bmHeight =dwY;
bb.bmPlanes = 1;
bb.bmWidthBytes=bb.bmWidth*3;
bb.bmBitsPixel=3;
bb.bmType=0;
b.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
b.bmiHeader.biWidth =dwX;
b.bmiHeader.biHeight =dwY;
b.bmiHeader.biPlanes =1;
b.bmiHeader.biBitCount =3*8;
b.bmiHeader.biCompression =BI_RGB;
b.bmiHeader.biSizeImage =0;
b.bmiHeader.biXPelsPerMeter=0;
b.bmiHeader.biYPelsPerMeter=0;
b.bmiHeader.biClrUsed =0;
b.bmiHeader.biClrImportant =0;
b.bmiColors[0].rgbBlue =8;
b.bmiColors[0].rgbGreen =8;
b.bmiColors[0].rgbRed =8;
b.bmiColors[0].rgbReserved =0;
hp=GetProcessHeap();
lpBuf=( char *)HeapAlloc(hp,HEAP_ZERO_MEMORY,bb.bmHeight*bb.bmWidth*4);
GetDIBits(hcDC,hBitmap,0,dwY,lpBuf,&b,DIB_RGB_COLORS);
SaveBitmapToFile(&bb,lpFileName,lpBuf);
ReleaseDC(NULL,hDC);
DeleteDC(hcDC);
DeleteObject(hBitmap);
DeleteObject(hOld);
HeapFree(hp,0,lpBuf);
return true;
}
int _tmain(int argc, _TCHAR* argv[])
{
LPCWSTR path = L "E:\\e.bmp";
GetBitmapFromScreen(path);
return 0;
}
| 648658| | 2022-11-30T11:53:00| false| | 2022-11-30T11:52:38.89| true| C生成曲线BMP http://zhidao.baidu.com/question/222913503.html 屏幕截屏 http://topic.csdn.net/u/20120822/13/e52e7b2a-e151-4985-9aa7-934d9f38c8de.html #include "| Anonymous|
标签：NULL,
bmiHeader,
bb,
曲线,
bi,
生成,
BMP,
-------------,
bitmap
From： https://www.cnblogs.com/ralphlauren/p/18621194