C++博客-子弹 の VISIONS-随笔分类-2.2 GDI APIhttp://www.cppblog.com/ztwaker/category/9401.html<font color=blue><br>欢迎交流：[email: ztwaker@qq.com][msn: ztwaker2008@hotmail.com][skype:ztwaker][qq:78094632]</font>zh-cnSat, 17 Jan 2009 17:07:08 GMTSat, 17 Jan 2009 17:07:08 GMT60[GDI] Resolution VS DPIhttp://www.cppblog.com/ztwaker/archive/2009/01/17/72225.html子弹のVISIONS子弹のVISIONSSat, 17 Jan 2009 15:14:00 GMThttp://www.cppblog.com/ztwaker/archive/2009/01/17/72225.htmlhttp://www.cppblog.com/ztwaker/comments/72225.htmlhttp://www.cppblog.com/ztwaker/archive/2009/01/17/72225.html#Feedback0http://www.cppblog.com/ztwaker/comments/commentRss/72225.htmlhttp://www.cppblog.com/ztwaker/services/trackbacks/72225.html
1. Difference between resolution and DPI:

Resolution: 显示器width*height有多大
DPI: 每 Inch 显示多少个点(dot)

2. How to get resolution:

a)
unsigned int w = ::GetSystemMetrics(SM_CXSCREEN);
unsigned int h = ::GetSystemMetrics(SM_CYSCREEN);

b)
RECT   rect;
::GetWindowRect(::GetDesktopWindow(), &rect); 
unsigned int w = ::abs(rect.right - rect.left);
unsigned int h = ::abs(rect.bottom - rect.top);

3. How to get DPI:

HDC hDC = ::GetDC(0);
int dpiX = ::GetDeviceCaps(hDC, LOGPIXELSX);
int dpiY = ::GetDeviceCaps(hDC, LOGPIXELSY);
// dpiX == dpiY



子弹のVISIONS 2009-01-17 23:14 发表评论
]]>