Fix normal hooks.

library/Core.cpp

@@ -56,6 +56,7 @@ using namespace DFHack;
 #include "df/world_data.h"
 #include "df/interface.h"
 #include "df/viewscreen_dwarfmodest.h"
+#include <df/graphic.h>
 
 #include <stdio.h>
 #include <iomanip>
@@ -771,6 +772,12 @@ void Core::Resume()
     AccessMutex->unlock();
 }
 
+int Core::TileUpdate()
+{
+    //df::global::gps->;
+    return true;
+}
+
 // should always be from simulation thread!
 int Core::Update()
 {
@@ -888,6 +895,7 @@ bool Core::ncurses_wgetch(int in, int & out)
     return true;
 }
 
+//MEMO: return false if event is consumed
 int Core::SDL_Event(SDL::Event* ev)
 {
     // do NOT process events before we are ready.

library/Hooks-egg.cpp

@@ -60,7 +60,8 @@ DFhackCExport int egg_tick(void)
 // hook - called before rendering
 DFhackCExport int egg_prerender(void)
 {
-    return true;
+    DFHack::Core & c = DFHack::Core::getInstance();
+    return c.TileUpdate();
 }
 
 // hook - called for each SDL event, returns 0 when the event has been consumed. 1 otherwise

library/Hooks-linux.cpp

@@ -69,12 +69,18 @@ DFhackCExport void SDL_Quit(void)
 static int (*_SDL_PollEvent)(SDL::Event* event) = 0;
 DFhackCExport int SDL_PollEvent(SDL::Event* event)
 {
+    pollevent_again:
+    // if SDL returns 0 here, it means there are no more events. return 0
     int orig_return = _SDL_PollEvent(event);
-    // if the event is valid, intercept
-    if( event != 0 )
+    if(!orig_return)
+        return 0;
+    // otherwise we have an event to filter
+    else if( event != 0 )
     {
         DFHack::Core & c = DFHack::Core::getInstance();
-        return c.SDL_Event(event, orig_return);
+        // if we consume the event, ask SDL for more.
+        if(!c.SDL_Event(event))
+            goto pollevent_again;
     }
     return orig_return;
 }

library/Hooks-windows.cpp

@@ -413,17 +413,22 @@ DFhackCExport uint8_t * SDL_GetKeyState(int* numkeys)
     return _SDL_GetKeyState(numkeys);
 }
 
-static int (*_SDL_PollEvent)(SDL::Event *) = 0;
-DFhackCExport int SDL_PollEvent(SDL::Event * event)
+// called by DF to check input events
+static int (*_SDL_PollEvent)(SDL::Event* event) = 0;
+DFhackCExport int SDL_PollEvent(SDL::Event* event)
 {
+    pollevent_again:
+    // if SDL returns 0 here, it means there are no more events. return 0
     int orig_return = _SDL_PollEvent(event);
-    // only send events to Core after we get first SDL_NumJoysticks call
-    // DF event loop is possibly polling for SDL events before things get inited properly
-    // SDL handles it. We don't, because we use some other parts of SDL too.
-    if(event != 0)
+    if(!orig_return)
+        return 0;
+    // otherwise we have an event to filter
+    else if( event != 0 )
     {
         DFHack::Core & c = DFHack::Core::getInstance();
-        return c.SDL_Event(event, orig_return);
+        // if we consume the event, ask SDL for more.
+        if(!c.SDL_Event(event))
+            goto pollevent_again;
     }
     return orig_return;
 }

library/include/Core.h

@@ -131,7 +131,8 @@ namespace DFHack
     private:
         Core();
         bool Init();
-        int Update   (void);
+        int Update (void);
+        int TileUpdate (void);
         int Shutdown (void);
         int SDL_Event(SDL::Event* event);
         bool ncurses_wgetch(int in, int & out);