在 C Win32 中使用 hBitmap = CreateDIBSection() 保存 .bmp 文件 [英] Saving .bmp file using hBitmap = CreateDIBSection() in C Win32
本文介绍了在 C Win32 中使用 hBitmap = CreateDIBSection() 保存 .bmp 文件的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有以下代码.我想使用此信息创建一个 .bmp 文件，该文件显示内存中的数据，这是从帧抓取器复制到主内存中的图像，有人可以让我吗?谢谢
I have the following code. I want to use this information to create one .bmp file that shows the data from memory which is a image copied from a framegrabber into main memory, can somebody please let me? Thank you
LPSTR CreateBMP( HWND hAppWnd, int nImageType )
{
无效* pWinGBits = NULL；诠释我;Z_BITMAPINFO zWinGHeader;//用于创建 DIB 的位图信息
{
void * pWinGBits = NULL;
int i;
Z_BITMAPINFO zWinGHeader; // bitmapinfo for cerating the DIB
// create DC for bitmap.
hDCBits = CreateCompatibleDC( ghDCMain );
switch ( nImageType )
{
case bayer_filter:
zWinGHeader.bmiHeader.biSize = sizeof( BITMAPINFOHEADER );
zWinGHeader.bmiHeader.biPlanes = 1;
zWinGHeader.bmiHeader.biClrImportant = 0;
zWinGHeader.bmiHeader.biHeight = -lYSize;
zWinGHeader.bmiHeader.biWidth = lXSize;
zWinGHeader.bmiHeader.biBitCount = 32;
zWinGHeader.bmiHeader.biClrUsed = 0;//3;
zWinGHeader.bmiHeader.biCompression = BI_BITFIELDS;
zWinGHeader.bmiHeader.biSizeImage = 0;
zWinGHeader.bmiColors[0].rgbBlue = 0x00;
zWinGHeader.bmiColors[0].rgbGreen = 0x00;
zWinGHeader.bmiColors[0].rgbRed = 0xFF;
zWinGHeader.bmiColors[0].rgbReserved = 0x00;
zWinGHeader.bmiColors[1].rgbBlue = 0x00;
zWinGHeader.bmiColors[1].rgbGreen = 0xFF;
zWinGHeader.bmiColors[1].rgbRed = 0x00;
zWinGHeader.bmiColors[1].rgbReserved = 0x00;
zWinGHeader.bmiColors[2].rgbBlue = 0xFF;
zWinGHeader.bmiColors[2].rgbGreen = 0x00;
zWinGHeader.bmiColors[2].rgbRed = 0x00;
zWinGHeader.bmiColors[2].rgbReserved = 0x00;
break;
case color32:
zWinGHeader.bmiHeader.biSize = sizeof( BITMAPINFOHEADER );
zWinGHeader.bmiHeader.biPlanes = 1;
zWinGHeader.bmiHeader.biClrImportant = 0;
zWinGHeader.bmiHeader.biHeight = -lYSize;
zWinGHeader.bmiHeader.biWidth = lXSize/4;
zWinGHeader.bmiHeader.biBitCount = 32;
zWinGHeader.bmiHeader.biClrUsed = 0;
zWinGHeader.bmiHeader.biCompression = BI_BITFIELDS;
zWinGHeader.bmiHeader.biSizeImage = 0;
zWinGHeader.bmiColors[0].rgbBlue = 0x00;
zWinGHeader.bmiColors[0].rgbGreen = 0x00;
zWinGHeader.bmiColors[0].rgbRed = 0xFF;
zWinGHeader.bmiColors[0].rgbReserved = 0x00;
zWinGHeader.bmiColors[1].rgbBlue = 0x00;
zWinGHeader.bmiColors[1].rgbGreen = 0xFF;
zWinGHeader.bmiColors[1].rgbRed = 0x00;
zWinGHeader.bmiColors[1].rgbReserved = 0x00;
zWinGHeader.bmiColors[2].rgbBlue = 0xFF;
zWinGHeader.bmiColors[2].rgbGreen = 0x00;
zWinGHeader.bmiColors[2].rgbRed = 0x00;
zWinGHeader.bmiColors[2].rgbReserved = 0x00;
break;
case color24:
zWinGHeader.bmiHeader.biSize = sizeof( BITMAPINFOHEADER );
zWinGHeader.bmiHeader.biPlanes = 1;
zWinGHeader.bmiHeader.biClrImportant = 0;
zWinGHeader.bmiHeader.biHeight = -lYSize;
zWinGHeader.bmiHeader.biWidth = lXSize/3;
zWinGHeader.bmiHeader.biBitCount = 24;
zWinGHeader.bmiHeader.biClrUsed = 0;
zWinGHeader.bmiHeader.biCompression = BI_RGB;
zWinGHeader.bmiHeader.biSizeImage = 0;
break;
case color3x16:
zWinGHeader.bmiHeader.biSize = sizeof( BITMAPINFOHEADER );
zWinGHeader.bmiHeader.biPlanes = 1;
zWinGHeader.bmiHeader.biClrImportant = 0;
zWinGHeader.bmiHeader.biHeight = -lYSize;
zWinGHeader.bmiHeader.biWidth = lXSize/6;
zWinGHeader.bmiHeader.biBitCount = 32;
zWinGHeader.bmiHeader.biClrUsed = 0;
zWinGHeader.bmiHeader.biCompression = BI_BITFIELDS;
zWinGHeader.bmiHeader.biSizeImage = 0;
zWinGHeader.bmiColors[0].rgbBlue = 0x00;
zWinGHeader.bmiColors[0].rgbGreen = 0x00;
zWinGHeader.bmiColors[0].rgbRed = 0xFF;
zWinGHeader.bmiColors[0].rgbReserved = 0x00;
zWinGHeader.bmiColors[1].rgbBlue = 0x00;
zWinGHeader.bmiColors[1].rgbGreen = 0xFF;
zWinGHeader.bmiColors[1].rgbRed = 0x00;
zWinGHeader.bmiColors[1].rgbReserved = 0x00;
zWinGHeader.bmiColors[2].rgbBlue = 0xFF;
zWinGHeader.bmiColors[2].rgbGreen = 0x00;
zWinGHeader.bmiColors[2].rgbRed = 0x00;
zWinGHeader.bmiColors[2].rgbReserved = 0x00;
break;
case bw1x10:
// create bitmap-infoheader.
zWinGHeader.bmiHeader.biSize = sizeof( BITMAPINFOHEADER );
zWinGHeader.bmiHeader.biPlanes = 1;
zWinGHeader.bmiHeader.biBitCount = 8;
zWinGHeader.bmiHeader.biCompression = BI_RGB;
zWinGHeader.bmiHeader.biSizeImage = 0;
zWinGHeader.bmiHeader.biClrUsed = 256;
zWinGHeader.bmiHeader.biClrImportant= 0;
zWinGHeader.bmiHeader.biHeight = -lYSize;
zWinGHeader.bmiHeader.biWidth = lXSize/2;
// create colortable fot bitmap (grayvalues).
for (i = 0; i < 256; i++)
{
zWinGHeader.bmiColors[i].rgbGreen = i;
zWinGHeader.bmiColors[i].rgbBlue = i;
zWinGHeader.bmiColors[i].rgbRed = i;
zWinGHeader.bmiColors[i].rgbReserved = 0;
}
break;
default:
case bw8:
// create bitmap-infoheader.
zWinGHeader.bmiHeader.biSize = sizeof( BITMAPINFOHEADER );
zWinGHeader.bmiHeader.biPlanes = 1;
zWinGHeader.bmiHeader.biBitCount = 8;
zWinGHeader.bmiHeader.biCompression = BI_RGB;
zWinGHeader.bmiHeader.biSizeImage = 0;
zWinGHeader.bmiHeader.biClrUsed = 256;
zWinGHeader.bmiHeader.biClrImportant= 0;
zWinGHeader.bmiHeader.biHeight = -lYSize;
zWinGHeader.bmiHeader.biWidth = lXSize;
// create colortable fot bitmap (grayvalues).
for (i = 0; i < 256; i++)
{
zWinGHeader.bmiColors[i].rgbGreen = i;
zWinGHeader.bmiColors[i].rgbBlue = i;
zWinGHeader.bmiColors[i].rgbRed = i;
zWinGHeader.bmiColors[i].rgbReserved = 0;
}
break;
}
// cerate identity palette
hPal = CreateIdentityPalette( zWinGHeader.bmiColors );
// get new palette into DC and map into physical palette register.
hOldPal = SelectPalette( ghDCMain, hPal, FALSE);
RealizePalette( ghDCMain );
// cerate DIB-Section f黵 direct access of image-data.
hBitmap = CreateDIBSection(
hDCBits, // handle of device context
(BITMAPINFO *)&zWinGHeader, // address of structure containing
// bitmap size, format and color data
DIB_RGB_COLORS, // color data type indicator: RGB values
// or palette indices
&pWinGBits, // pointer to variable to receive a pointer
// to the bitmap's bit values
NULL, // optional handle to a file mapping object
0 // offset to the bitmap bit values within
// the file mapping object
);
// get bitmap into DC .
hOldBitmap = (HBITMAP)SelectObject( hDCBits, hBitmap );
return pWinGBits; // return pointer to DIB
}
推荐答案
使用 win32 api 从内存中的图像数据或 HBITMAP 到图像文件的最简单方法是使用 GDI+.只需从您的图像数据或 HBITMAP 创建一个位图对象(请参阅 http://msdn.microsoft.com/en-us/library/ms536314%28v=vs.85%29.aspx)，然后使用 Save 方法创建文件(参见 http://msdn.microsoft.com/en-us/library/ms535407%28v=vs.85%29.aspx).如果您不能使用 C++，这些方法也作为可从 C 调用的函数存在.
The easiest way to go from image data in memory or an HBITMAP to an image file using the win32 api is with GDI+. Just create a Bitmap object from your image data or HBITMAP (see http://msdn.microsoft.com/en-us/library/ms536314%28v=vs.85%29.aspx), then use the Save method to create the file (see http://msdn.microsoft.com/en-us/library/ms535407%28v=vs.85%29.aspx). If you're not able to use C++, those methods also exist as functions callable from C.
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