source/graphics/windows/display.cpp

   1 #include "display.h"
   2 #include "display_private.h"
   3 #include <algorithm>
   4 #include <windows.h>
   5
   6 using namespace std;
   7
   8 namespace Msp {
   9 namespace Graphics {
  10
  11 Display::Display(const string &):
  12         priv(new Private)
  13 {
  14         static ErrorDialog err_dlg(nullptr);
  15
  16         int primary_index = -1;
  17         vector<unsigned> mode_monitor_indices;
  18         vector<int> desktop_mode_indices;
  19         for(unsigned i=0;; ++i)
  20         {
  21                 DISPLAY_DEVICE adapter_dev;
  22                 adapter_dev.cb = sizeof(adapter_dev);
  23                 if(!EnumDisplayDevices(nullptr, i, &adapter_dev, 0))
  24                         break;
  25
  26                 if(adapter_dev.StateFlags&DISPLAY_DEVICE_MIRRORING_DRIVER)
  27                         continue;
  28
  29                 monitors.push_back(Monitor());
  30                 Monitor &monitor = monitors.back();
  31                 monitor.index = monitors.size()-1;
  32                 monitor.name = adapter_dev.DeviceString;
  33                 priv->monitors.push_back(adapter_dev.DeviceName);
  34
  35                 if(adapter_dev.StateFlags&DISPLAY_DEVICE_PRIMARY_DEVICE)
  36                         primary_index = i;
  37
  38                 DEVMODE current;
  39                 bool have_current = EnumDisplaySettings(adapter_dev.DeviceName, ENUM_CURRENT_SETTINGS, &current);
  40
  41                 unsigned first_mode = modes.size();
  42                 int desktop_mode_index = -1;
  43                 for(unsigned j=0;; ++j)
  44                 {
  45                         DEVMODE info;
  46                         if(!EnumDisplaySettings(adapter_dev.DeviceName, j, &info))
  47                                 break;
  48
  49                         if(any_of(modes.begin()+first_mode, modes.end(), [&info](const VideoMode &m){
  50                                         return (m.width==info.dmPelsWidth && m.height==info.dmPelsHeight && m.rate==info.dmDisplayFrequency);
  51                                 }))
  52                                 continue;
  53
  54                         VideoMode mode(info.dmPelsWidth, info.dmPelsHeight);
  55                         mode.index = modes.size();
  56                         mode.rate = info.dmDisplayFrequency;
  57
  58                         modes.push_back(mode);
  59                         mode_monitor_indices.push_back(monitor.index);
  60
  61                         if(have_current && info.dmPelsWidth==current.dmPelsWidth && info.dmPelsHeight==current.dmPelsHeight && info.dmDisplayFrequency==current.dmDisplayFrequency)
  62                                 desktop_mode_index = mode.index;
  63                 }
  64                 desktop_mode_indices.push_back(desktop_mode_index);
  65         }
  66
  67         for(unsigned i=0; i<monitors.size(); ++i)
  68         {
  69                 int j = desktop_mode_indices[i];
  70                 if(j>=0)
  71                         monitors[i].desktop_settings.mode = &modes[j];
  72                 monitors[i].current_settings = monitors[i].desktop_settings;
  73         }
  74
  75         for(unsigned i=0; i<modes.size(); ++i)
  76         {
  77                 Monitor &monitor = monitors[mode_monitor_indices[i]];
  78                 modes[i].monitor = &monitor;
  79                 monitor.video_modes.push_back(&modes[i]);
  80         }
  81
  82         if(primary_index>=0)
  83                 primary_monitor = &monitors[primary_index];
  84 }
  85
  86 Display::~Display()
  87 {
  88         delete priv;
  89 }
  90
  91 void Display::set_mode(const VideoMode &requested_mode, bool)
  92 {
  93         const VideoMode *mode = find_mode(requested_mode);
  94         if(!mode)
  95                 throw unsupported_video_mode(requested_mode);
  96
  97         DEVMODE info;
  98         info.dmDeviceName[0] = 0;
  99         info.dmSpecVersion = DM_SPECVERSION;
 100         info.dmDriverVersion = 0;
 101         info.dmSize = sizeof(DEVMODE);
 102         info.dmDriverExtra = 0;
 103         info.dmFields = DM_PELSWIDTH|DM_PELSHEIGHT;
 104         info.dmPelsWidth = mode->width;
 105         info.dmPelsHeight = mode->height;
 106         if(requested_mode.rate)
 107         {
 108                 info.dmFields |= DM_DISPLAYFREQUENCY;
 109                 info.dmDisplayFrequency = mode->rate;
 110         }
 111
 112         LONG ret = ChangeDisplaySettingsEx(priv->monitors[mode->monitor->index].c_str(), &info, NULL, CDS_FULLSCREEN, NULL);
 113         if(ret!=DISP_CHANGE_SUCCESSFUL)
 114                 throw unsupported_video_mode(requested_mode);
 115
 116         for(Monitor &m: monitors)
 117                 if(&m==mode->monitor)
 118                         m.current_settings.mode = mode;
 119 }
 120
 121 bool Display::process_events()
 122 {
 123         MSG msg;
 124         if(PeekMessage(&msg, nullptr, 0, 0, PM_REMOVE))
 125         {
 126                 TranslateMessage(&msg);
 127                 DispatchMessage(&msg);
 128                 return true;
 129         }
 130         else
 131                 return false;
 132 }
 133
 134 void Display::check_error()
 135 {
 136 }
 137
 138 } // namespace Msp
 139 } // namespace Graphics