DCHook/MonitorScale.cpp

   1 #include <windows.h>
   2 #include <tchar.h>
   3 #pragma hdrstop
   4 #include "MonitorScale.h"
   5 void dbw(const char *,...);
   6
   7 #if WINVER<0x0601
   8 #define QDC_ALL_PATHS                   0x00000001
   9 #define QDC_ONLY_ACTIVE_PATHS           0x00000002
  10 #define QDC_DATABASE_CURRENT            0x00000004
  11 typedef enum
  12 {
  13     DISPLAYCONFIG_OUTPUT_TECHNOLOGY_OTHER                   = -1,
  14     DISPLAYCONFIG_OUTPUT_TECHNOLOGY_HD15                    =  0,
  15     DISPLAYCONFIG_OUTPUT_TECHNOLOGY_SVIDEO                  =  1,
  16     DISPLAYCONFIG_OUTPUT_TECHNOLOGY_COMPOSITE_VIDEO         =  2,
  17     DISPLAYCONFIG_OUTPUT_TECHNOLOGY_COMPONENT_VIDEO         =  3,
  18     DISPLAYCONFIG_OUTPUT_TECHNOLOGY_DVI                     =  4,
  19     DISPLAYCONFIG_OUTPUT_TECHNOLOGY_HDMI                    =  5,
  20     DISPLAYCONFIG_OUTPUT_TECHNOLOGY_LVDS                    =  6,
  21     DISPLAYCONFIG_OUTPUT_TECHNOLOGY_D_JPN                   =  8,
  22     DISPLAYCONFIG_OUTPUT_TECHNOLOGY_SDI                     =  9,
  23     DISPLAYCONFIG_OUTPUT_TECHNOLOGY_DISPLAYPORT_EXTERNAL    = 10,
  24     DISPLAYCONFIG_OUTPUT_TECHNOLOGY_DISPLAYPORT_EMBEDDED    = 11,
  25     DISPLAYCONFIG_OUTPUT_TECHNOLOGY_UDI_EXTERNAL            = 12,
  26     DISPLAYCONFIG_OUTPUT_TECHNOLOGY_UDI_EMBEDDED            = 13,
  27     DISPLAYCONFIG_OUTPUT_TECHNOLOGY_SDTVDONGLE              = 14,
  28     DISPLAYCONFIG_OUTPUT_TECHNOLOGY_INTERNAL                = 0x80000000,
  29     DISPLAYCONFIG_OUTPUT_TECHNOLOGY_FORCE_UINT32            = 0xFFFFFFFF
  30 } DISPLAYCONFIG_VIDEO_OUTPUT_TECHNOLOGY;
  31 typedef enum
  32 {
  33     DISPLAYCONFIG_ROTATION_IDENTITY     = 1,
  34     DISPLAYCONFIG_ROTATION_ROTATE90     = 2,
  35     DISPLAYCONFIG_ROTATION_ROTATE180    = 3,
  36     DISPLAYCONFIG_ROTATION_ROTATE270    = 4,
  37     DISPLAYCONFIG_ROTATION_FORCE_UINT32 = 0xFFFFFFFF
  38 } DISPLAYCONFIG_ROTATION;
  39 typedef enum
  40 {
  41     DISPLAYCONFIG_SCALING_IDENTITY                  = 1,
  42     DISPLAYCONFIG_SCALING_CENTERED                  = 2,
  43     DISPLAYCONFIG_SCALING_STRETCHED                 = 3,
  44     DISPLAYCONFIG_SCALING_ASPECTRATIOCENTEREDMAX    = 4,
  45     DISPLAYCONFIG_SCALING_CUSTOM                    = 5,
  46     DISPLAYCONFIG_SCALING_PREFERRED                 = 128,
  47     DISPLAYCONFIG_SCALING_FORCE_UINT32              = 0xFFFFFFFF
  48 } DISPLAYCONFIG_SCALING;
  49 typedef struct DISPLAYCONFIG_RATIONAL
  50 {
  51     UINT32    Numerator;
  52     UINT32    Denominator;
  53 } DISPLAYCONFIG_RATIONAL;
  54 typedef enum
  55 {
  56         DISPLAYCONFIG_SCANLINE_ORDERING_UNSPECIFIED                 = 0,
  57         DISPLAYCONFIG_SCANLINE_ORDERING_PROGRESSIVE                 = 1,
  58         DISPLAYCONFIG_SCANLINE_ORDERING_INTERLACED                  = 2,
  59         DISPLAYCONFIG_SCANLINE_ORDERING_INTERLACED_UPPERFIELDFIRST  = DISPLAYCONFIG_SCANLINE_ORDERING_INTERLACED,
  60         DISPLAYCONFIG_SCANLINE_ORDERING_INTERLACED_LOWERFIELDFIRST  = 3,
  61         DISPLAYCONFIG_SCANLINE_ORDERING_FORCE_UINT32                = 0xFFFFFFFF
  62 } DISPLAYCONFIG_SCANLINE_ORDERING;
  63 typedef enum
  64 {
  65     DISPLAYCONFIG_MODE_INFO_TYPE_SOURCE = 1,
  66     DISPLAYCONFIG_MODE_INFO_TYPE_TARGET = 2,
  67     DISPLAYCONFIG_MODE_INFO_TYPE_FORCE_UINT32 = 0xFFFFFFFF
  68 } DISPLAYCONFIG_MODE_INFO_TYPE;
  69 typedef struct DISPLAYCONFIG_2DREGION
  70 {
  71     UINT32 cx;
  72     UINT32 cy;
  73 } DISPLAYCONFIG_2DREGION;
  74 typedef struct DISPLAYCONFIG_VIDEO_SIGNAL_INFO
  75 {
  76         UINT64                          pixelRate;
  77         DISPLAYCONFIG_RATIONAL          hSyncFreq;
  78         DISPLAYCONFIG_RATIONAL          vSyncFreq;
  79         DISPLAYCONFIG_2DREGION          activeSize;
  80         DISPLAYCONFIG_2DREGION          totalSize;
  81         UINT32                          videoStandard;
  82         DISPLAYCONFIG_SCANLINE_ORDERING scanLineOrdering;
  83 } DISPLAYCONFIG_VIDEO_SIGNAL_INFO;
  84 typedef enum
  85 {
  86     DISPLAYCONFIG_PIXELFORMAT_8BPP          = 1,
  87     DISPLAYCONFIG_PIXELFORMAT_16BPP         = 2,
  88     DISPLAYCONFIG_PIXELFORMAT_24BPP         = 3,
  89     DISPLAYCONFIG_PIXELFORMAT_32BPP         = 4,
  90     DISPLAYCONFIG_PIXELFORMAT_NONGDI        = 5,
  91     DISPLAYCONFIG_PIXELFORMAT_FORCE_UINT32  = 0xffffffff
  92 } DISPLAYCONFIG_PIXELFORMAT;
  93 typedef enum
  94 {
  95       DISPLAYCONFIG_TOPOLOGY_INTERNAL       = 0x00000001,
  96       DISPLAYCONFIG_TOPOLOGY_CLONE          = 0x00000002,
  97       DISPLAYCONFIG_TOPOLOGY_EXTEND         = 0x00000004,
  98       DISPLAYCONFIG_TOPOLOGY_EXTERNAL       = 0x00000008,
  99       DISPLAYCONFIG_TOPOLOGY_FORCE_UINT32   = 0xFFFFFFFF
 100 } DISPLAYCONFIG_TOPOLOGY_ID;
 101 typedef enum
 102 {
 103       DISPLAYCONFIG_DEVICE_INFO_GET_SOURCE_NAME             = 1,
 104       DISPLAYCONFIG_DEVICE_INFO_GET_TARGET_NAME             = 2,
 105       DISPLAYCONFIG_DEVICE_INFO_GET_TARGET_PREFERRED_MODE   = 3,
 106       DISPLAYCONFIG_DEVICE_INFO_GET_ADAPTER_NAME            = 4,
 107       DISPLAYCONFIG_DEVICE_INFO_SET_TARGET_PERSISTENCE      = 5,
 108       DISPLAYCONFIG_DEVICE_INFO_FORCE_UINT32                = 0xFFFFFFFF
 109 } DISPLAYCONFIG_DEVICE_INFO_TYPE;
 110
 111 typedef struct DISPLAYCONFIG_PATH_SOURCE_INFO
 112 {
 113         LUID    adapterId;
 114         UINT32  id;
 115         UINT32  modeInfoIdx;
 116         UINT32  statusFlags;
 117 } DISPLAYCONFIG_PATH_SOURCE_INFO;
 118 typedef struct DISPLAYCONFIG_PATH_TARGET_INFO
 119 {
 120         LUID                                    adapterId;
 121         UINT32                                  id;
 122         UINT32                                  modeInfoIdx;
 123         DISPLAYCONFIG_VIDEO_OUTPUT_TECHNOLOGY   outputTechnology;
 124         DISPLAYCONFIG_ROTATION                  rotation;
 125         DISPLAYCONFIG_SCALING                   scaling;
 126         DISPLAYCONFIG_RATIONAL                  refreshRate;
 127         DISPLAYCONFIG_SCANLINE_ORDERING         scanLineOrdering;
 128         BOOL                                    targetAvailable;
 129         UINT32                                  statusFlags;
 130 } DISPLAYCONFIG_PATH_TARGET_INFO;
 131 typedef struct DISPLAYCONFIG_PATH_INFO
 132 {
 133         DISPLAYCONFIG_PATH_SOURCE_INFO  sourceInfo;
 134         DISPLAYCONFIG_PATH_TARGET_INFO  targetInfo;
 135         UINT32                          flags;
 136 } DISPLAYCONFIG_PATH_INFO;
 137 typedef struct DISPLAYCONFIG_TARGET_MODE
 138 {
 139     DISPLAYCONFIG_VIDEO_SIGNAL_INFO   targetVideoSignalInfo;
 140 } DISPLAYCONFIG_TARGET_MODE;
 141 typedef struct DISPLAYCONFIG_SOURCE_MODE
 142 {
 143     UINT32                      width;
 144     UINT32                      height;
 145     DISPLAYCONFIG_PIXELFORMAT   pixelFormat;
 146     POINTL                      position;
 147 } DISPLAYCONFIG_SOURCE_MODE;
 148 typedef struct DISPLAYCONFIG_MODE_INFO
 149 {
 150         DISPLAYCONFIG_MODE_INFO_TYPE    infoType;
 151         UINT32                          id;
 152         LUID                            adapterId;
 153         union
 154         {
 155                 DISPLAYCONFIG_TARGET_MODE   targetMode;
 156                 DISPLAYCONFIG_SOURCE_MODE   sourceMode;
 157         };
 158 } DISPLAYCONFIG_MODE_INFO;
 159 typedef struct DISPLAYCONFIG_DEVICE_INFO_HEADER
 160 {
 161         DISPLAYCONFIG_DEVICE_INFO_TYPE  type;
 162         UINT32                          size;
 163         LUID                            adapterId;
 164         UINT32                          id;
 165 } DISPLAYCONFIG_DEVICE_INFO_HEADER;
 166
 167 #endif
 168
 169 typedef WINUSERAPI LONG (WINAPI *FNGetDisplayConfigBufferSizes)(UINT32 flags, UINT32* numPathArrayElements, UINT32* numModeInfoArrayElements);
 170 typedef WINUSERAPI LONG (WINAPI *FNSetDisplayConfig)(UINT32 numPathArrayElements, DISPLAYCONFIG_PATH_INFO* pathArray, UINT32 numModeInfoArrayElements, DISPLAYCONFIG_MODE_INFO* modeInfoArray, UINT32 flags);
 171 typedef WINUSERAPI LONG (WINAPI *FNQueryDisplayConfig)(UINT32 flags, UINT32* numPathArrayElements, DISPLAYCONFIG_PATH_INFO* pathArray, UINT32* numModeInfoArrayElements, DISPLAYCONFIG_MODE_INFO* modeInfoArray, DISPLAYCONFIG_TOPOLOGY_ID* currentTopologyId);
 172 typedef WINUSERAPI LONG (WINAPI *FNDisplayConfigGetDeviceInfo)(DISPLAYCONFIG_DEVICE_INFO_HEADER* requestPacket);
 173
 174 class TDllHandle {
 175 protected:
 176         HINSTANCE hInst;
 177 public:
 178         TDllHandle(HINSTANCE _hInst)
 179                 :hInst(_hInst)
 180         {
 181         }
 182         ~TDllHandle(){
 183                 if (hInst) FreeLibrary(hInst);
 184         }
 185         HINSTANCE inst(){ return hInst; }
 186         operator HINSTANCE (){ return hInst; }
 187         FARPROC GetProcAddress(LPCSTR name)
 188                 { return ::GetProcAddress(hInst, name); }
 189 };
 190
 191 static TDllHandle *dllHandle = NULL;
 192 static FNGetDisplayConfigBufferSizes _GetDisplayConfigBufferSizes;
 193 static FNQueryDisplayConfig _QueryDisplayConfig;
 194 static bool called = false;
 195 static int prevDpi = 0;
 196 class TDestructor {
 197 public:
 198         ~TDestructor(){ if (dllHandle){ delete dllHandle; dllHandle = NULL; } }
 199 } destructor;
 200
 201 int GetMonitorScale()
 202 {
 203         int dpi = 96;
 204
 205         if (!called){
 206                 called = true;
 207                 HINSTANCE hDll = LoadLibrary( _T("user32") );
 208                 if (!hDll)
 209                         return dpi;
 210
 211                 TDllHandle hInst(hDll);
 212                 dllHandle = new TDllHandle(hDll);
 213
 214                 _GetDisplayConfigBufferSizes = (FNGetDisplayConfigBufferSizes)dllHandle->GetProcAddress("GetDisplayConfigBufferSizes");
 215                 if (!_GetDisplayConfigBufferSizes)
 216                         return dpi;
 217                 _QueryDisplayConfig = (FNQueryDisplayConfig)dllHandle->GetProcAddress("QueryDisplayConfig");
 218                 if (!_QueryDisplayConfig)
 219                         return dpi;
 220         }
 221
 222         if (!dllHandle) return dpi;
 223
 224         POINT pt;
 225         GetCursorPos( &pt );
 226
 227         int PhysicalDesktopWidth;
 228         int PhysicalMonitorWidth;
 229         DISPLAYCONFIG_PATH_INFO *dpis = NULL;
 230         DISPLAYCONFIG_MODE_INFO *pModeInfoArray = NULL;
 231         bool ok = false;
 232         while (1){
 233                 UINT32 numofpath;
 234                 UINT32 numofmode;
 235                 LONG ret = _GetDisplayConfigBufferSizes(QDC_DATABASE_CURRENT, &numofpath, &numofmode);
 236                 if (ret!=ERROR_SUCCESS)
 237                         break;
 238                 if (numofpath==0)
 239                         break;
 240
 241                 dpis = new DISPLAYCONFIG_PATH_INFO[numofpath];
 242                 if (!dpis) break;
 243                 pModeInfoArray = new DISPLAYCONFIG_MODE_INFO[numofmode];
 244                 if (!pModeInfoArray) break;
 245                 DISPLAYCONFIG_TOPOLOGY_ID tid;
 246                 //Note: QDC_ONLY_ACTIVE_PATHS\82ð\8ew\92è\82·\82é\82Æparameter error\82ª\95Ô\82Á\82Ä\82\82é\81H\81H
 247                 ret = _QueryDisplayConfig(QDC_DATABASE_CURRENT, &numofpath, dpis, &numofmode, pModeInfoArray, &tid);    //TODO: Windows7 or later
 248                 if (ret == ERROR_INSUFFICIENT_BUFFER){
 249                         delete[] dpis;
 250                         delete[] pModeInfoArray;
 251                         continue;
 252                 }
 253                 if (ret != ERROR_SUCCESS){
 254                         dbw("ret=%d", ret);
 255                         break;
 256                 }
 257
 258                 for (int i=0;i<(int)numofpath;i++){
 259                         //Note: DISPLAYCONFIG_PATH_ACTIVE\82Ì\92è\8b`\82ª\95s\96¾
 260                         //      Active\82Èpath\82ª\8dÅ\8f\89\97ñ\8b\93\82³\82ê\82é\81A\82Ædocument\82É\82 \82é\82Ì\82Å\96â\91è\82È\82¢\82Æ\8ev\82¤\82ª
 261                         //if (!(dpis[i].flags & DISPLAYCONFIG_PATH_ACTIVE)) continue;
 262                         DISPLAYCONFIG_SOURCE_MODE &srcMode = pModeInfoArray[ dpis[i].sourceInfo.modeInfoIdx ].sourceMode;
 263                         if (pt.x >= srcMode.position.x && pt.x < srcMode.position.x + srcMode.width
 264                                 && pt.y >= srcMode.position.y && pt.y < srcMode.position.y + srcMode.height){
 265                                 // included in a desktop area
 266                                 PhysicalDesktopWidth = srcMode.width;
 267                                 DISPLAYCONFIG_TARGET_MODE &targetMode = pModeInfoArray[ dpis[i].targetInfo.modeInfoIdx ].targetMode;
 268                                 PhysicalMonitorWidth = targetMode.targetVideoSignalInfo.activeSize.cx;
 269                                 ok = true;
 270                                 dbw("ok: %d %d @(%d,%d)", PhysicalDesktopWidth, PhysicalMonitorWidth, pt.x, pt.y);
 271                                 break;
 272                         }
 273                 }
 274                 break;
 275         }
 276
 277         if (dpis) delete[] dpis;
 278         if (pModeInfoArray) delete[] pModeInfoArray;
 279
 280         if (ok)
 281                 return prevDpi = dpi * PhysicalDesktopWidth / PhysicalMonitorWidth;
 282         return dpi;
 283 }
 284