56 lines
1.3 KiB
C++
56 lines
1.3 KiB
C++
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/* Author: Josh Holtrop
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* DornerWorks screensaver
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* This Windows-specific module will get the screen size
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* and return the number of monitors present. Right now the
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* screensaver will only work properly with two identically
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* sized monitors...
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*/
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#include <string>
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#include <windows.h>
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#include "displayinfo.h"
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static int numMonitors = 0;
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void getDisplaySize(int * width, int * height)
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{
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std::string nullStr = "";
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int w = 0;
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int h = 0;
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/* loop through the display devices to get their dimensions */
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for (int i = 0; i < 10; i++)
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{
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DISPLAY_DEVICE dev;
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dev.cb = sizeof(DISPLAY_DEVICE);
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if (!EnumDisplayDevices(NULL, i, &dev, 0))
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break;
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/* we only want real display devices to matter */
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if (dev.DeviceID != nullStr)
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{
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HDC hdc = CreateDC(TEXT("DISPLAY"), dev.DeviceString, NULL, NULL);
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if (hdc != NULL)
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{
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numMonitors++;
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w += GetDeviceCaps(hdc, HORZRES);
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int thisHeight = GetDeviceCaps(hdc, VERTRES);
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if (thisHeight > h)
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h = thisHeight;
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}
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}
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}
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/* only update width and height if we have valid data */
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if (w != 0 && h != 0)
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{
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*width = w;
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*height = h;
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}
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}
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int getNumMonitors()
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{
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return numMonitors;
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}
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