generic-library/opencv
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Added cvShowImage working with handles under Windows.

Browse Source
This commit is contained in:
Alexander Reshetnikov 2012-02-22 13:30:47 +00:00
parent 50df95650a
commit 8b7edda6ac
1 changed files with 77 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

77
modules/highgui/src/window_w32.cpp
View File

@ -1452,6 +1452,83 @@ cvShowImage( const char* name, const CvArr* arr )
__END__;
}
CV_IMPL void
cvShowImageHWND(HWND w_hWnd, const CvArr* arr)
{
CV_FUNCNAME( "cvShowImageHWND" );
__BEGIN__;
SIZE size = { 0, 0 };
int channels = 0;
void* dst_ptr = 0;
const int channels0 = 3;
int origin = 0;
CvMat stub, dst, *image;
bool changed_size = false;
BITMAPINFO tempbinfo;
HDC hdc = NULL;
if( !arr )
EXIT;
if( !w_hWnd )
EXIT;
hdc = GetDC(w_hWnd);
if( CV_IS_IMAGE_HDR( arr ) )
origin = ((IplImage*)arr)->origin;
CV_CALL( image = cvGetMat( arr, &stub ) );
if ( hdc )
{
//GetBitmapData
BITMAP bmp;
GdiFlush();
HGDIOBJ h = GetCurrentObject( hdc, OBJ_BITMAP );
if (h == NULL)
EXIT;
if (GetObject(h, sizeof(bmp), &bmp) == 0) //GetObject(): returns size of object, 0 if error
EXIT;
channels = bmp.bmBitsPixel/8;
dst_ptr = bmp.bmBits;
}
if( size.cx != image->width || size.cy != image->height || channels != channels0 )
{
changed_size = true;
uchar buffer[sizeof(BITMAPINFO) + 255*sizeof(RGBQUAD)];
BITMAPINFO* binfo = (BITMAPINFO*)buffer;
BOOL bDeleteObj = DeleteObject(GetCurrentObject(hdc, OBJ_BITMAP));
CV_Assert( FALSE != bDeleteObj );
size.cx = image->width;
size.cy = image->height;
channels = channels0;
FillBitmapInfo( binfo, size.cx, size.cy, channels*8, 1 );
HGDIOBJ tempImage = SelectObject( hdc, CreateDIBSection( hdc, binfo, DIB_RGB_COLORS, &dst_ptr, 0, 0));
}
cvInitMatHeader( &dst, size.cy, size.cx, CV_8UC3, dst_ptr, (size.cx * channels + 3) & -4 );
cvConvertImage( image, &dst, origin == 0 ? CV_CVTIMG_FLIP : 0 );
// Image stretching to fit the window
RECT rect;
GetClientRect(w_hWnd, &rect);
int bSuccess = StretchDIBits( hdc, 0, 0, rect.right, rect.bottom, 0, 0, image->width, image->height, dst_ptr, &tempbinfo, DIB_RGB_COLORS, SRCCOPY );
// ony resize window if needed
InvalidateRect(w_hWnd, 0, 0);
__END__;
}
CV_IMPL void cvResizeWindow(const char* name, int width, int height )
{