Add debugging info for Wintab activated by argument `--debug-wintab`.

Bonus: Added docs for `--debug-ghost`.

Differential Revision: https://developer.blender.org/D14610

17 files changed, 316 insertions, 12 deletions

diff --git a/intern/ghost/GHOST_C-api.h b/intern/ghost/GHOST_C-api.h
index a82f634183d..ec641938f1f 100644
--- a/intern/ghost/GHOST_C-api.h
+++ b/intern/ghost/GHOST_C-api.h
@@ -30,8 +30,10 @@ extern GHOST_SystemHandle GHOST_CreateSystem(void);
 
 /**
  * Specifies whether debug messages are to be enabled for the specific system handle.
+ * \param systemhandle: The handle to the system.
+ * \param debug: Flag for systems to debug.
  */
-extern void GHOST_SystemInitDebug(GHOST_SystemHandle systemhandle, int is_debug_enabled);
+extern void GHOST_SystemInitDebug(GHOST_SystemHandle systemhandle, GHOST_Debug debug);
 
 /**
  * Disposes the one and only system.
diff --git a/intern/ghost/GHOST_ISystem.h b/intern/ghost/GHOST_ISystem.h
index ed193ee7e5d..bb91abbadec 100644
--- a/intern/ghost/GHOST_ISystem.h
+++ b/intern/ghost/GHOST_ISystem.h
@@ -452,8 +452,9 @@ class GHOST_ISystem {
 
   /**
    * Specify whether debug messages are to be shown.
+   * \param debug: Flag for systems to debug.
    */
-  virtual void initDebug(bool is_debug_enabled) = 0;
+  virtual void initDebug(GHOST_Debug debug) = 0;
 
   /**
    * Check whether debug messages are to be shown.
diff --git a/intern/ghost/GHOST_Types.h b/intern/ghost/GHOST_Types.h
index c654367072f..85913fbd10c 100644
--- a/intern/ghost/GHOST_Types.h
+++ b/intern/ghost/GHOST_Types.h
@@ -573,6 +573,16 @@ typedef struct {
   uint32_t frequency;
 } GHOST_DisplaySetting;
 
+typedef enum {
+  /** Axis that cursor grab will wrap. */
+  GHOST_kDebugDefault = (1 << 1),
+  GHOST_kDebugWintab = (1 << 2),
+} GHOST_TDebugFlags;
+
+typedef struct {
+  int flags;
+} GHOST_Debug;
+
 #ifdef _WIN32
 typedef void *GHOST_TEmbedderWindowID;
 #endif  // _WIN32
diff --git a/intern/ghost/intern/GHOST_C-api.cpp b/intern/ghost/intern/GHOST_C-api.cpp
index e3d01c24283..93e94893162 100644
--- a/intern/ghost/intern/GHOST_C-api.cpp
+++ b/intern/ghost/intern/GHOST_C-api.cpp
@@ -30,11 +30,11 @@ GHOST_SystemHandle GHOST_CreateSystem(void)
   return (GHOST_SystemHandle)system;
 }
 
-void GHOST_SystemInitDebug(GHOST_SystemHandle systemhandle, int is_debug_enabled)
+void GHOST_SystemInitDebug(GHOST_SystemHandle systemhandle, GHOST_Debug debug)
 {
   GHOST_ISystem *system = (GHOST_ISystem *)systemhandle;
 
-  system->initDebug(is_debug_enabled);
+  system->initDebug(debug);
 }
 
 GHOST_TSuccess GHOST_DisposeSystem(GHOST_SystemHandle systemhandle)
diff --git a/intern/ghost/intern/GHOST_System.cpp b/intern/ghost/intern/GHOST_System.cpp
index 3df85e18bc7..0d0d41972fd 100644
--- a/intern/ghost/intern/GHOST_System.cpp
+++ b/intern/ghost/intern/GHOST_System.cpp
@@ -390,9 +390,9 @@ void GHOST_System::useWindowFocus(const bool use_focus)
   m_windowFocus = use_focus;
 }
 
-void GHOST_System::initDebug(bool is_debug_enabled)
+void GHOST_System::initDebug(GHOST_Debug debug)
 {
-  m_is_debug_enabled = is_debug_enabled;
+  m_is_debug_enabled = debug.flags & GHOST_kDebugDefault;
 }
 
 bool GHOST_System::isDebugEnabled()
diff --git a/intern/ghost/intern/GHOST_System.h b/intern/ghost/intern/GHOST_System.h
index 0e1e3f734ae..4a3cded1fbd 100644
--- a/intern/ghost/intern/GHOST_System.h
+++ b/intern/ghost/intern/GHOST_System.h
@@ -334,8 +334,9 @@ class GHOST_System : public GHOST_ISystem {
 
   /**
    * Specify whether debug messages are to be shown.
+   * \param debug: Flag for systems to debug.
    */
-  virtual void initDebug(bool is_debug_enabled);
+  virtual void initDebug(GHOST_Debug debug);
 
   /**
    * Check whether debug messages are to be shown.
diff --git a/intern/ghost/intern/GHOST_SystemWin32.cpp b/intern/ghost/intern/GHOST_SystemWin32.cpp
index e588c7485b4..83869188b65 100644
--- a/intern/ghost/intern/GHOST_SystemWin32.cpp
+++ b/intern/ghost/intern/GHOST_SystemWin32.cpp
@@ -872,6 +872,13 @@ GHOST_EventButton *GHOST_SystemWin32::processButtonEvent(GHOST_TEventType type,
     int msgPosY = GET_Y_LPARAM(msgPos);
     system->pushEvent(new GHOST_EventCursor(
         ::GetMessageTime(), GHOST_kEventCursorMove, window, msgPosX, msgPosY, td));
+
+    if (type == GHOST_kEventButtonDown) {
+      WINTAB_PRINTF("HWND %p OS button down\n", window->getHWND());
+    }
+    else if (type == GHOST_kEventButtonUp) {
+      WINTAB_PRINTF("HWND %p OS button up\n", window->getHWND());
+    }
   }
 
   window->updateMouseCapture(type == GHOST_kEventButtonDown ? MousePressed : MouseReleased);
@@ -914,6 +921,8 @@ void GHOST_SystemWin32::processWintabEvent(GHOST_WindowWin32 *window)
         break;
       }
       case GHOST_kEventButtonDown: {
+        WINTAB_PRINTF("HWND %p Wintab button down", window->getHWND());
+
         UINT message;
         switch (info.button) {
           case GHOST_kButtonMaskLeft:
@@ -939,9 +948,12 @@ void GHOST_SystemWin32::processWintabEvent(GHOST_WindowWin32 *window)
           /* Test for Win32/Wintab button down match. */
           useWintabPos = wt->testCoordinates(msg.pt.x, msg.pt.y, info.x, info.y);
           if (!useWintabPos) {
+            WINTAB_PRINTF(" ... but associated system button mismatched position\n");
             continue;
           }
 
+          WINTAB_PRINTF(" ... associated to system button\n");
+
           /* Steal the Win32 event which was previously peeked. */
           PeekMessage(&msg, window->getHWND(), message, message, PM_REMOVE | PM_NOYIELD);
 
@@ -958,9 +970,14 @@ void GHOST_SystemWin32::processWintabEvent(GHOST_WindowWin32 *window)
           mouseMoveHandled = true;
           break;
         }
+        else {
+          WINTAB_PRINTF(" ... but no system button\n");
+        }
       }
       case GHOST_kEventButtonUp: {
+        WINTAB_PRINTF("HWND %p Wintab button up", window->getHWND());
         if (!useWintabPos) {
+          WINTAB_PRINTF(" ... but Wintab position isn't trusted\n");
           continue;
         }
 
@@ -986,10 +1003,14 @@ void GHOST_SystemWin32::processWintabEvent(GHOST_WindowWin32 *window)
         if (PeekMessage(&msg, window->getHWND(), message, message, PM_REMOVE | PM_NOYIELD) &&
             msg.message != WM_QUIT) {
 
+          WINTAB_PRINTF(" ... associated to system button\n");
           window->updateMouseCapture(MouseReleased);
           system->pushEvent(
               new GHOST_EventButton(info.time, info.type, window, info.button, info.tabletData));
         }
+        else {
+          WINTAB_PRINTF(" ... but no system button\n");
+        }
         break;
       }
       default:
@@ -1318,6 +1339,12 @@ void GHOST_SystemWin32::setTabletAPI(GHOST_TTabletAPI api)
   }
 }
 
+void GHOST_SystemWin32::initDebug(GHOST_Debug debug)
+{
+  GHOST_System::initDebug(debug);
+  GHOST_Wintab::setDebug(debug.flags & GHOST_kDebugWintab);
+}
+
 void GHOST_SystemWin32::processMinMaxInfo(MINMAXINFO *minmax)
 {
   minmax->ptMinTrackSize.x = 320;
@@ -1593,6 +1620,7 @@ LRESULT WINAPI GHOST_SystemWin32::s_wndProc(HWND hwnd, UINT msg, WPARAM wParam,
         // Wintab events, processed
         ////////////////////////////////////////////////////////////////////////
         case WT_CSRCHANGE: {
+          WINTAB_PRINTF("HWND %p HCTX %p WT_CSRCHANGE\n", window->getHWND(), (void *)lParam);
           GHOST_Wintab *wt = window->getWintab();
           if (wt) {
             wt->updateCursorInfo();
@@ -1601,6 +1629,20 @@ LRESULT WINAPI GHOST_SystemWin32::s_wndProc(HWND hwnd, UINT msg, WPARAM wParam,
           break;
         }
         case WT_PROXIMITY: {
+          WINTAB_PRINTF("HWND %p HCTX %p WT_PROXIMITY\n", window->getHWND(), (void *)wParam);
+          if (LOWORD(lParam)) {
+            WINTAB_PRINTF(" Cursor entering context.\n");
+          }
+          else {
+            WINTAB_PRINTF(" Cursor leaving context.\n");
+          }
+          if (HIWORD(lParam)) {
+            WINTAB_PRINTF(" Cursor entering or leaving hardware proximity.\n");
+          }
+          else {
+            WINTAB_PRINTF(" Cursor neither entering nor leaving hardware proximity.\n");
+          }
+
           GHOST_Wintab *wt = window->getWintab();
           if (wt) {
             bool inRange = LOWORD(lParam);
@@ -1616,6 +1658,7 @@ LRESULT WINAPI GHOST_SystemWin32::s_wndProc(HWND hwnd, UINT msg, WPARAM wParam,
           break;
         }
         case WT_INFOCHANGE: {
+          WINTAB_PRINTF("HWND %p HCTX %p WT_INFOCHANGE\n", window->getHWND(), (void *)wParam);
           GHOST_Wintab *wt = window->getWintab();
           if (wt) {
             wt->processInfoChange(lParam);
@@ -1632,6 +1675,32 @@ LRESULT WINAPI GHOST_SystemWin32::s_wndProc(HWND hwnd, UINT msg, WPARAM wParam,
           eventHandled = true;
           break;
         ////////////////////////////////////////////////////////////////////////
+        // Wintab events, debug
+        ////////////////////////////////////////////////////////////////////////
+        case WT_CTXOPEN:
+          WINTAB_PRINTF("HWND %p HCTX %p WT_CTXOPEN\n", window->getHWND(), (void *)wParam);
+          break;
+        case WT_CTXCLOSE:
+          WINTAB_PRINTF("HWND %p HCTX %p WT_CTXCLOSE\n", window->getHWND(), (void *)wParam);
+          break;
+        case WT_CTXUPDATE:
+          WINTAB_PRINTF("HWND %p HCTX %p WT_CTXUPDATE\n", window->getHWND(), (void *)wParam);
+          break;
+        case WT_CTXOVERLAP:
+          WINTAB_PRINTF("HWND %p HCTX %p WT_CTXOVERLAP", window->getHWND(), (void *)wParam);
+          switch (lParam) {
+            case CXS_DISABLED:
+              WINTAB_PRINTF(" CXS_DISABLED\n");
+              break;
+            case CXS_OBSCURED:
+              WINTAB_PRINTF(" CXS_OBSCURED\n");
+              break;
+            case CXS_ONTOP:
+              WINTAB_PRINTF(" CXS_ONTOP\n");
+              break;
+          }
+          break;
+        ////////////////////////////////////////////////////////////////////////
         // Pointer events, processed
         ////////////////////////////////////////////////////////////////////////
         case WM_POINTERUPDATE:
@@ -1692,6 +1761,7 @@ LRESULT WINAPI GHOST_SystemWin32::s_wndProc(HWND hwnd, UINT msg, WPARAM wParam,
           break;
         case WM_MOUSEMOVE:
           if (!window->m_mousePresent) {
+            WINTAB_PRINTF("HWND %p mouse enter\n", window->getHWND());
             TRACKMOUSEEVENT tme = {sizeof(tme)};
             tme.dwFlags = TME_LEAVE;
             tme.hwndTrack = hwnd;
@@ -1740,6 +1810,7 @@ LRESULT WINAPI GHOST_SystemWin32::s_wndProc(HWND hwnd, UINT msg, WPARAM wParam,
           }
           break;
         case WM_MOUSELEAVE: {
+          WINTAB_PRINTF("HWND %p mouse leave\n", window->getHWND());
           window->m_mousePresent = false;
           if (window->getTabletData().Active == GHOST_kTabletModeNone) {
             event = processCursorEvent(window);
diff --git a/intern/ghost/intern/GHOST_SystemWin32.h b/intern/ghost/intern/GHOST_SystemWin32.h
index 16ad5f041ca..9f8d52f9ca3 100644
--- a/intern/ghost/intern/GHOST_SystemWin32.h
+++ b/intern/ghost/intern/GHOST_SystemWin32.h
@@ -259,6 +259,16 @@ class GHOST_SystemWin32 : public GHOST_System {
    */
   void setTabletAPI(GHOST_TTabletAPI api) override;
 
+  /***************************************************************************************
+   ** Debug Info
+   ***************************************************************************************/
+
+  /**
+   * Specify which debug messages are to be shown.
+   * \param debug: Flag for systems to debug.
+   */
+  void initDebug(GHOST_Debug debug) override;
+
  protected:
   /**
    * Initializes the system.
diff --git a/intern/ghost/intern/GHOST_WindowWin32.cpp b/intern/ghost/intern/GHOST_WindowWin32.cpp
index 11a3c097958..2ce224b666b 100644
--- a/intern/ghost/intern/GHOST_WindowWin32.cpp
+++ b/intern/ghost/intern/GHOST_WindowWin32.cpp
@@ -960,6 +960,7 @@ GHOST_Wintab *GHOST_WindowWin32::getWintab() const
 void GHOST_WindowWin32::loadWintab(bool enable)
 {
   if (!m_wintab) {
+    WINTAB_PRINTF("Loading Wintab for window %p\n", m_hWnd);
     if (m_wintab = GHOST_Wintab::loadWintab(m_hWnd)) {
       if (enable) {
         m_wintab->enable();
@@ -982,6 +983,7 @@ void GHOST_WindowWin32::loadWintab(bool enable)
 
 void GHOST_WindowWin32::closeWintab()
 {
+  WINTAB_PRINTF("Closing Wintab for window %p\n", m_hWnd);
   delete m_wintab;
   m_wintab = NULL;
 }
diff --git a/intern/ghost/intern/GHOST_Wintab.cpp b/intern/ghost/intern/GHOST_Wintab.cpp
index 2547a38c0d1..be1a0a4b314 100644
--- a/intern/ghost/intern/GHOST_Wintab.cpp
+++ b/intern/ghost/intern/GHOST_Wintab.cpp
@@ -11,7 +11,6 @@
 GHOST_Wintab *GHOST_Wintab::loadWintab(HWND hwnd)
 {
   /* Load Wintab library if available. */
-
   auto handle = unique_hmodule(::LoadLibrary("Wintab32.dll"), &::FreeLibrary);
   if (!handle) {
     return nullptr;
@@ -116,6 +115,11 @@ GHOST_Wintab *GHOST_Wintab::loadWintab(HWND hwnd)
     }
   }
 
+  int sanityQueueSize = queueSizeGet(hctx.get());
+  WINTAB_PRINTF("HCTX %p %s queueSize: %d, queueSizeGet: %d\n", hctx.get(), __func__, queueSize, sanityQueueSize);
+
+  WINTAB_PRINTF("Loaded Wintab context %p\n", hctx.get());
+
   return new GHOST_Wintab(std::move(handle),
                           info,
                           get,
@@ -183,7 +187,17 @@ GHOST_Wintab::GHOST_Wintab(unique_hmodule handle,
       m_pkts{queueSize}
 {
   m_fpInfo(WTI_INTERFACE, IFC_NDEVICES, &m_numDevices);
+  WINTAB_PRINTF("Wintab Devices: %d\n", m_numDevices);
+
   updateCursorInfo();
+
+  /* Debug info. */
+  printContextDebugInfo();
+}
+
+GHOST_Wintab::~GHOST_Wintab()
+{
+  WINTAB_PRINTF("Closing Wintab context %p\n", m_context.get());
 }
 
 void GHOST_Wintab::enable()
@@ -249,6 +263,7 @@ void GHOST_Wintab::updateCursorInfo()
 
   BOOL pressureSupport = m_fpInfo(WTI_DEVICES, DVC_NPRESSURE, &Pressure);
   m_maxPressure = pressureSupport ? Pressure.axMax : 0;
+  WINTAB_PRINTF("HCTX %p %s maxPressure: %d\n", m_context.get(), __func__, m_maxPressure);
 
   BOOL tiltSupport = m_fpInfo(WTI_DEVICES, DVC_ORIENTATION, &Orientation);
   /* Check if tablet supports azimuth [0] and altitude [1], encoded in axResolution. */
@@ -259,6 +274,7 @@ void GHOST_Wintab::updateCursorInfo()
   else {
     m_maxAzimuth = m_maxAltitude = 0;
   }
+  WINTAB_PRINTF("HCTX %p %s maxAzimuth: %d, maxAltitude: %d\n", m_context.get(), __func__, m_maxAzimuth, m_maxAltitude);
 }
 
 void GHOST_Wintab::processInfoChange(LPARAM lParam)
@@ -266,6 +282,7 @@ void GHOST_Wintab::processInfoChange(LPARAM lParam)
   /* Update number of connected Wintab digitizers. */
   if (LOWORD(lParam) == WTI_INTERFACE && HIWORD(lParam) == IFC_NDEVICES) {
     m_fpInfo(WTI_INTERFACE, IFC_NDEVICES, &m_numDevices);
+    WINTAB_PRINTF("HCTX %p %s numDevices: %d\n", m_context.get(), __func__, m_numDevices);
   }
 }
 
@@ -456,3 +473,144 @@ bool GHOST_Wintab::testCoordinates(int sysX, int sysY, int wtX, int wtY)
     return false;
   }
 }
+
+bool GHOST_Wintab::m_debug = false;
+
+void GHOST_Wintab::setDebug(bool debug)
+{
+  m_debug = debug;
+}
+
+bool GHOST_Wintab::getDebug()
+{
+  return m_debug;
+}
+
+void GHOST_Wintab::printContextDebugInfo()
+{
+  if (!m_debug) {
+    return;
+  }
+
+  /* Print button maps. */
+  BYTE logicalButtons[32] = {0};
+  BYTE systemButtons[32] = {0};
+  for (int i = 0; i < 3; i++) {
+    printf("initializeWintab cursor %d buttons\n", i);
+    UINT lbut = m_fpInfo(WTI_CURSORS + i, CSR_BUTTONMAP, &logicalButtons);
+    if (lbut) {
+      printf("%d", logicalButtons[0]);
+      for (int j = 1; j < lbut; j++) {
+        printf(", %d", logicalButtons[j]);
+      }
+      printf("\n");
+    }
+    else {
+      printf("logical button error\n");
+    }
+    UINT sbut = m_fpInfo(WTI_CURSORS + i, CSR_SYSBTNMAP, &systemButtons);
+    if (sbut) {
+      printf("%d", systemButtons[0]);
+      for (int j = 1; j < sbut; j++) {
+        printf(", %d", systemButtons[j]);
+      }
+      printf("\n");
+    }
+    else {
+      printf("system button error\n");
+    }
+  }
+
+  /* Print context information. */
+
+  /* Print open context constraints. */
+  UINT maxcontexts, opencontexts;
+  m_fpInfo(WTI_INTERFACE, IFC_NCONTEXTS, &maxcontexts);
+  m_fpInfo(WTI_STATUS, STA_CONTEXTS, &opencontexts);
+  printf("%u max contexts, %u open contexts\n", maxcontexts, opencontexts);
+
+  /* Print system information. */
+  printf("left: %d, top: %d, width: %d, height: %d\n",
+                ::GetSystemMetrics(SM_XVIRTUALSCREEN),
+                ::GetSystemMetrics(SM_YVIRTUALSCREEN),
+                ::GetSystemMetrics(SM_CXVIRTUALSCREEN),
+                ::GetSystemMetrics(SM_CYVIRTUALSCREEN));
+
+  auto printContextRanges = [](LOGCONTEXT &lc) {
+    printf("lcInOrgX: %d, lcInOrgY: %d, lcInExtX: %d, lcInExtY: %d\n",
+           lc.lcInOrgX,
+           lc.lcInOrgY,
+           lc.lcInExtX,
+           lc.lcInExtY);
+    printf("lcOutOrgX: %d, lcOutOrgY: %d, lcOutExtX: %d, lcOutExtY: %d\n",
+           lc.lcOutOrgX,
+           lc.lcOutOrgY,
+           lc.lcOutExtX,
+           lc.lcOutExtY);
+    printf("lcSysOrgX: %d, lcSysOrgY: %d, lcSysExtX: %d, lcSysExtY: %d\n",
+           lc.lcSysOrgX,
+           lc.lcSysOrgY,
+           lc.lcSysExtX,
+           lc.lcSysExtY);
+  };
+
+  LOGCONTEXT lc;
+
+  /* Print system context. */
+  m_fpInfo(WTI_DEFSYSCTX, 0, &lc);
+  printf("WTI_DEFSYSCTX\n");
+  printContextRanges(lc);
+
+  /* Print system context, manually populated. */
+  m_fpInfo(WTI_DEFSYSCTX, CTX_INORGX, &lc.lcInOrgX);
+  m_fpInfo(WTI_DEFSYSCTX, CTX_INORGY, &lc.lcInOrgY);
+  m_fpInfo(WTI_DEFSYSCTX, CTX_INEXTX, &lc.lcInExtX);
+  m_fpInfo(WTI_DEFSYSCTX, CTX_INEXTY, &lc.lcInExtY);
+  m_fpInfo(WTI_DEFSYSCTX, CTX_OUTORGX, &lc.lcOutOrgX);
+  m_fpInfo(WTI_DEFSYSCTX, CTX_OUTORGY, &lc.lcOutOrgY);
+  m_fpInfo(WTI_DEFSYSCTX, CTX_OUTEXTX, &lc.lcOutExtX);
+  m_fpInfo(WTI_DEFSYSCTX, CTX_OUTEXTY, &lc.lcOutExtY);
+  m_fpInfo(WTI_DEFSYSCTX, CTX_SYSORGX, &lc.lcSysOrgX);
+  m_fpInfo(WTI_DEFSYSCTX, CTX_SYSORGY, &lc.lcSysOrgY);
+  m_fpInfo(WTI_DEFSYSCTX, CTX_SYSEXTX, &lc.lcSysExtX);
+  m_fpInfo(WTI_DEFSYSCTX, CTX_SYSEXTY, &lc.lcSysExtY);
+  printf("WTI_DEFSYSCTX CTX_*\n");
+  printContextRanges(lc);
+    
+  for (unsigned int i = 0; i < m_numDevices; i++) {
+    /* Print individual device system context. */
+    m_fpInfo(WTI_DSCTXS + i, 0, &lc);
+    printf("WTI_DSCTXS %u\n", i);
+    printContextRanges(lc);
+
+    /* Print individual device system context, manually populated. */
+    m_fpInfo(WTI_DSCTXS + i, CTX_INORGX, &lc.lcInOrgX);
+    m_fpInfo(WTI_DSCTXS + i, CTX_INORGY, &lc.lcInOrgY);
+    m_fpInfo(WTI_DSCTXS + i, CTX_INEXTX, &lc.lcInExtX);
+    m_fpInfo(WTI_DSCTXS + i, CTX_INEXTY, &lc.lcInExtY);
+    m_fpInfo(WTI_DSCTXS + i, CTX_OUTORGX, &lc.lcOutOrgX);
+    m_fpInfo(WTI_DSCTXS + i, CTX_OUTORGY, &lc.lcOutOrgY);
+    m_fpInfo(WTI_DSCTXS + i, CTX_OUTEXTX, &lc.lcOutExtX);
+    m_fpInfo(WTI_DSCTXS + i, CTX_OUTEXTY, &lc.lcOutExtY);
+    m_fpInfo(WTI_DSCTXS + i, CTX_SYSORGX, &lc.lcSysOrgX);
+    m_fpInfo(WTI_DSCTXS + i, CTX_SYSORGY, &lc.lcSysOrgY);
+    m_fpInfo(WTI_DSCTXS + i, CTX_SYSEXTX, &lc.lcSysExtX);
+    m_fpInfo(WTI_DSCTXS + i, CTX_SYSEXTY, &lc.lcSysExtY);
+    printf("WTI_DSCTX %u CTX_*\n", i);
+    printContextRanges(lc);
+
+    /* Print device axis. */
+    AXIS axis_x, axis_y;
+    m_fpInfo(WTI_DEVICES + i, DVC_X, &axis_x);
+    m_fpInfo(WTI_DEVICES + i, DVC_Y, &axis_y);
+    printf("WTI_DEVICES %u axis_x org: %d, axis_y org: %d axis_x ext: %d, axis_y ext: %d\n",
+                  i,
+                  axis_x.axMin,
+                  axis_y.axMin,
+                  axis_x.axMax - axis_x.axMin + 1,
+                  axis_y.axMax - axis_y.axMin + 1);
+  }
+
+  /* Other stuff while we have a logcontext. */
+  printf("sysmode %d\n", lc.lcSysMode);
+}
\ No newline at end of file
diff --git a/intern/ghost/intern/GHOST_Wintab.h b/intern/ghost/intern/GHOST_Wintab.h
index a793d2d8f63..86a0143ecc0 100644
--- a/intern/ghost/intern/GHOST_Wintab.h
+++ b/intern/ghost/intern/GHOST_Wintab.h
@@ -13,6 +13,7 @@
 #pragma once
 
 #include <memory>
+#include <stdio.h>
 #include <vector>
 #include <wtypes.h>
 
@@ -25,6 +26,14 @@
 #define PACKETMODE 0
 #include <pktdef.h>
 
+#define WINTAB_PRINTF(x, ...) \
+  { \
+    if (GHOST_Wintab::getDebug()) { \
+      printf(x, __VA_ARGS__); \
+    } \
+  } \
+  (void)0
+
 /* Typedefs for Wintab functions to allow dynamic loading. */
 typedef UINT(API *GHOST_WIN32_WTInfo)(UINT, UINT, LPVOID);
 typedef BOOL(API *GHOST_WIN32_WTGet)(HCTX, LPLOGCONTEXTA);
@@ -55,9 +64,12 @@ class GHOST_Wintab {
   /**
    * Loads Wintab if available.
    * \param hwnd: Window to attach Wintab context to.
+   * \return Pointer to the initialized GHOST_Wintab object, or null if initialization failed.
    */
   static GHOST_Wintab *loadWintab(HWND hwnd);
 
+  ~GHOST_Wintab();
+
   /**
    * Enables Wintab context.
    */
@@ -146,6 +158,16 @@ class GHOST_Wintab {
    */
   GHOST_TabletData getLastTabletData();
 
+  /* Sets Wintab debugging.
+   * \param debug: True to enable Wintab debugging.
+   */
+  static void setDebug(bool debug);
+
+  /* Returns whether Wintab logging should occur.
+   * \return True if Wintab logging should occur.
+   */
+  static bool getDebug();
+
  private:
   /** Wintab DLL handle. */
   unique_hmodule m_handle;
@@ -200,6 +222,9 @@ class GHOST_Wintab {
   /** Most recently received tablet data, or none if pen is not in range. */
   GHOST_TabletData m_lastTabletData = GHOST_TABLET_DATA_NONE;
 
+  /** Whether Wintab logging is enabled. */
+  static bool m_debug;
+
   GHOST_Wintab(unique_hmodule handle,
                GHOST_WIN32_WTInfo info,
                GHOST_WIN32_WTGet get,
@@ -233,4 +258,7 @@ class GHOST_Wintab {
    * \param system: System coordinates.
    */
   static void extractCoordinates(LOGCONTEXT &lc, Coord &tablet, Coord &system);
+
+  /* Prints Wintab Context information. */
+  void printContextDebugInfo();
 };
diff --git a/release/datafiles/locale b/release/datafiles/locale
-Subproject 716dc02ec30c0810513f7b4adc4ae865ae50c4e
+Subproject 63699f968344db7dc853d2c5972325beea44900
diff --git a/release/scripts/addons b/release/scripts/addons
-Subproject 787ea78f7fa6f0373d80ba1247768402df93f8a
+Subproject baa581415c7ed23d7c45ef87363174813567268
diff --git a/source/blender/blenkernel/BKE_global.h b/source/blender/blenkernel/BKE_global.h
index d82e7460071..2070584a8a0 100644
--- a/source/blender/blenkernel/BKE_global.h
+++ b/source/blender/blenkernel/BKE_global.h
@@ -195,12 +195,13 @@ enum {
   G_DEBUG_XR = (1 << 19),                    /* XR/OpenXR messages */
   G_DEBUG_XR_TIME = (1 << 20),               /* XR/OpenXR timing messages */
 
-  G_DEBUG_GHOST = (1 << 21), /* Debug GHOST module. */
+  G_DEBUG_GHOST = (1 << 21),                 /* Debug GHOST module. */
+  G_DEBUG_WINTAB = (1 << 22),                /* Debug Wintab. */
 };
 
 #define G_DEBUG_ALL \
   (G_DEBUG | G_DEBUG_FFMPEG | G_DEBUG_PYTHON | G_DEBUG_EVENTS | G_DEBUG_WM | G_DEBUG_JOBS | \
-   G_DEBUG_FREESTYLE | G_DEBUG_DEPSGRAPH | G_DEBUG_IO | G_DEBUG_GHOST)
+   G_DEBUG_FREESTYLE | G_DEBUG_DEPSGRAPH | G_DEBUG_IO | G_DEBUG_GHOST | G_DEBUG_WINTAB)
 
 /** #Global.fileflags */
 enum {
diff --git a/source/blender/windowmanager/intern/wm_window.c b/source/blender/windowmanager/intern/wm_window.c
index 89bb6906a22..382a37e09e5 100644
--- a/source/blender/windowmanager/intern/wm_window.c
+++ b/source/blender/windowmanager/intern/wm_window.c
@@ -1541,7 +1541,15 @@ void wm_ghost_init(bContext *C)
     }
 
     g_system = GHOST_CreateSystem();
-    GHOST_SystemInitDebug(g_system, G.debug & G_DEBUG_GHOST);
+
+    GHOST_Debug debug = {0};
+    if (G.debug & G_DEBUG_GHOST) {
+      debug.flags |= GHOST_kDebugDefault;
+    }
+    if (G.debug & G_DEBUG_WINTAB) {
+      debug.flags |= GHOST_kDebugWintab;
+    }
+    GHOST_SystemInitDebug(g_system, debug);
 
     if (C != NULL) {
       GHOST_AddEventConsumer(g_system, consumer);
diff --git a/source/creator/creator_args.c b/source/creator/creator_args.c
index 05b7f1bcb85..b3f5d24ee8c 100644
--- a/source/creator/creator_args.c
+++ b/source/creator/creator_args.c
@@ -576,6 +576,7 @@ static int arg_handle_print_help(int UNUSED(argc), const char **UNUSED(argv), vo
   BLI_args_print_arg_doc(ba, "--debug-depsgraph-pretty");
   BLI_args_print_arg_doc(ba, "--debug-depsgraph-uuid");
   BLI_args_print_arg_doc(ba, "--debug-ghost");
+  BLI_args_print_arg_doc(ba, "--debug-wintab");
   BLI_args_print_arg_doc(ba, "--debug-gpu");
   BLI_args_print_arg_doc(ba, "--debug-gpu-force-workarounds");
   BLI_args_print_arg_doc(ba, "--debug-wm");
@@ -943,6 +944,12 @@ static const char arg_handle_debug_mode_generic_set_doc_wm[] =
     "\n\t"
     "Enable debug messages for the window manager, shows all operators in search, shows "
     "keymap errors.";
+static const char arg_handle_debug_mode_generic_set_doc_ghost[] =
+    "\n\t"
+    "Enable debug messages for Ghost (Linux only).";
+static const char arg_handle_debug_mode_generic_set_doc_wintab[] =
+    "\n\t"
+    "Enable debug messages for Wintab.";
 #  ifdef WITH_XR_OPENXR
 static const char arg_handle_debug_mode_generic_set_doc_xr[] =
     "\n\t"
@@ -2130,8 +2137,13 @@ void main_args_setup(bContext *C, bArgs *ba)
   BLI_args_add(ba,
                NULL,
                "--debug-ghost",
-               CB_EX(arg_handle_debug_mode_generic_set, handlers),
+               CB_EX(arg_handle_debug_mode_generic_set, ghost),
                (void *)G_DEBUG_GHOST);
+  BLI_args_add(ba,
+               NULL,
+               "--debug-wintab",
+               CB_EX(arg_handle_debug_mode_generic_set, wintab),
+               (void *)G_DEBUG_WINTAB);
   BLI_args_add(ba, NULL, "--debug-all", CB(arg_handle_debug_mode_all), NULL);
 
   BLI_args_add(ba, NULL, "--debug-io", CB(arg_handle_debug_mode_io), NULL);
diff --git a/source/tools b/source/tools
-Subproject 1e658ca996f11e5ff3398d89bd81f5b719304a5
+Subproject 4c1e01e3e309282beb1af3b1eddb2c7f9a666b5