minigui:获取屏幕分辨率(GetGDCapability)

约定不等于承诺〃 2022-05-19 23:53 280阅读 0赞

MiniGUI下获取屏幕分辨率用  
[`unsigned int GetGDCapability (HDC hdc, int iItem)`][unsigned int GetGDCapability _HDC hdc_ int iItem]

// 屏幕宽度
    int screen_width = GetGDCapability(HDC_SCREEN,GDCAP_HPIXEL);
    // 屏幕高度
    int screen_height =GetGDCapability(HDC_SCREEN,GDCAP_VPIXEL);

`GetGDCapability` 用于返回HDC的参数，如果hdc参数为`HDC_SCREEN`,返回的就是屏幕DC的相关参数，不同的iItem值返回不同的参数：

> GDCAP\_COLORNUM  
> Tell GetGDCapability to return the colors number of the DC. Note the for a DC with 32-bit depth, the function will return 0xFFFFFFFF, not 0x100000000.  
> GDCAP\_HPIXEL  
> Tell GetGCapability to return the horizontal resolution of the DC.  
> GDCAP\_VPIXEL  
> Tell GetGDCapability to return the vertical resolution of the DC.  
> GDCAP\_MAXX  
> Tell GetGDCapability to return the maximal visible x value of the DC.  
> GDCAP\_MAXY  
> Tell GetGDCapability to return the maximal visible y value of the DC.  
> GDCAP\_DEPTH  
> Tell GetGDCapability to return the color depth of the DC. The returned value can be 1, 4, 8, 15, 16, 24, or 32.  
> GDCAP\_BITSPP  
> Tell GetGDCapability to return the bits number for storing a pixle in the DC.  
> GDCAP\_BPP  
> Tell GetGDCapability to return the bytes number for storing a pixle in the DC.  
> GDCAP\_RMASK  
> Tell GetGDCapability to return the pixel red color mask for the DC.  
> GDCAP\_GMASK  
> Tell GetGDCapability to return the pixel green color mask for the DC.  
> GDCAP\_BMASK  
> Tell GetGDCapability to return the pixel blue color mask for the DC.  
> GDCAP\_AMASK  
> Tell GetGDCapability to return the pixel alpha color mask for the DC.  
> GDCAP\_PITCH  
> Tell GetGDCapability to return the pitch (the bytes of one scan line) of the DC.

官方API说明参见：  
[http://www.minigui.com/api\_ref/3.0.12\_processes/group\_\_dc\_\_fns.html][http_www.minigui.com_api_ref_3.0.12_processes_group_dc_fns.html]

[unsigned int GetGDCapability _HDC hdc_ int iItem]: http://www.minigui.com/api_ref/3.0.12_processes/group__dc__fns.html#gaa3fdba913cec27baaf8b2a815da5966f
[http_www.minigui.com_api_ref_3.0.12_processes_group_dc_fns.html]: http://www.minigui.com/api_ref/3.0.12_processes/group__dc__fns.html