Use real SDL mouse grab instead of cursor warping (should fix running game

[lugaru.git] / Source / OpenGL_Windows.cpp

diff --git a/Source/OpenGL_Windows.cpp b/Source/OpenGL_Windows.cpp
index 77f0c305162f129d027c723b9238c3f55c2d5cd3..5c8f491fd2dfc67e38d413a840fb8cd505f3102d 100644 (file)
--- a/Source/OpenGL_Windows.cpp
+++ b/Source/OpenGL_Windows.cpp
@@ -134,6 +134,43 @@ typedef struct tagPOINT {
 #endif
 
 #if USE_SDL
+#define GL_FUNC(ret,fn,params,call,rt) \
+    extern "C" { \
+        static ret GLAPIENTRY (*p##fn) params = NULL; \
+        ret GLAPIENTRY fn params { rt p##fn call; } \
+    }
+#include "glstubs.h"
+#undef GL_FUNC
+
+static bool lookup_glsym(const char *funcname, void **func, const char *libname)
+{
+    *func = SDL_GL_GetProcAddress(funcname);
+    if (*func == NULL)
+    {
+        fprintf(stderr, "Failed to find OpenGL symbol \"%s\" in \"%s\"\n",
+                 funcname, libname);
+        return false;
+    }
+    return true;
+}
+
+static bool lookup_all_glsyms(const char *libname)
+{
+    bool retval = true;
+    #define GL_FUNC(ret,fn,params,call,rt) \
+        if (!lookup_glsym(#fn, (void **) &p##fn, libname)) retval = false;
+    #include "glstubs.h"
+    #undef GL_FUNC
+    return retval;
+}
+
+static void GLAPIENTRY glDeleteTextures_doNothing(GLsizei n, const GLuint *textures)
+{
+    // no-op.
+}
+
+
+
 void sdlGetCursorPos(POINT *pt)
 {
     int x, y;
@@ -186,8 +223,6 @@ Boolean gDone = false, gfFrontProcess = true;
 
 Game * pgame = 0;
 
-static bool gMouseGrabbed = true;
-
 // --------------------------------------------------------------------------
 
 void ReportError (char * strError)
@@ -395,11 +430,16 @@ static inline int clamp_sdl_mouse_button(Uint8 button)
     return -1;
 }
 
-static void sdlEventProc(const SDL_Event &e)
+static void sdlEventProc(const SDL_Event &e, Game &game)
 {
     int val;
     switch(e.type)
        {
+        case SDL_MOUSEMOTION:
+            game.deltah += e.motion.xrel;
+            game.deltav += e.motion.yrel;
+            return;
+
                case SDL_MOUSEBUTTONDOWN:
                        {
                 val = clamp_sdl_mouse_button(e.button.button);
@@ -442,7 +482,15 @@ static void sdlEventProc(const SDL_Event &e)
             if (e.key.keysym.sym == SDLK_g)
             {
                 if (e.key.keysym.mod & KMOD_CTRL)
-                    gMouseGrabbed = !gMouseGrabbed;
+                {
+                    SDL_GrabMode mode = SDL_GRAB_ON;
+                    if ((SDL_GetVideoSurface()->flags & SDL_FULLSCREEN) == 0)
+                    {
+                        mode = SDL_WM_GrabInput(SDL_GRAB_QUERY);
+                        mode = (mode==SDL_GRAB_ON) ? SDL_GRAB_OFF:SDL_GRAB_ON;
+                    }
+                    SDL_WM_GrabInput(mode);
+                }
             }
 
             else if (e.key.keysym.sym == SDLK_RETURN)
@@ -798,9 +846,20 @@ Boolean SetUp (Game & game)
             fprintf(stderr, "SDL_Init() failed: %s\n", SDL_GetError());
             return false;
         }
+
+        const char *libname = "libGL.so.1";  // !!! FIXME: Linux specific!
+        if (SDL_GL_LoadLibrary(libname) == -1)
+        {
+            fprintf(stderr, "SDL_GL_LoadLibrary(\"%s\") failed: %s\n",
+                    libname, SDL_GetError());
+            return false;
+        }
+
+        if (!lookup_all_glsyms(libname))
+            return false;
     }
 
-    Uint32 sdlflags = SDL_OPENGL;
+    Uint32 sdlflags = SDL_OPENGL;  // !!! FIXME: SDL_FULLSCREEN?
     SDL_WM_SetCaption("Lugaru", "lugaru");
     SDL_ShowCursor(0);
     if (SDL_SetVideoMode(kContextWidth, kContextHeight, 0, sdlflags) == NULL)
@@ -809,6 +868,8 @@ Boolean SetUp (Game & game)
         return false;
     }
 
+
+
 #elif (defined WIN32)
        //------------------------------------------------------------------
        // create window
@@ -999,6 +1060,23 @@ Boolean SetUp (Game & game)
 
 static void DoMouse(Game & game)
 {
+#if USE_SDL
+       if(mainmenu||(abs(game.deltah)<10*realmultiplier*1000&&abs(game.deltav)<10*realmultiplier*1000))
+       {
+               game.deltah *= usermousesensitivity;
+               game.deltav *= usermousesensitivity;
+               game.mousecoordh += game.deltah;
+               game.mousecoordv += game.deltav;
+        if (game.mousecoordh < 0)
+            game.mousecoordh = 0;
+        else if (game.mousecoordh >= kContextWidth)
+            game.mousecoordh = kContextWidth - 1;
+        if (game.mousecoordv < 0)
+            game.mousecoordv = 0;
+        else if (game.mousecoordv >= kContextHeight)
+            game.mousecoordv = kContextHeight - 1;
+       }
+#else
        static Point lastMouse = {-1,-1};
        Point globalMouse;
 
@@ -1030,7 +1108,7 @@ static void DoMouse(Game & game)
                        game.mousecoordv=globalMouse.v;
                }
 
-               if((!mainmenu)&&(gMouseGrabbed))
+               if(!mainmenu)
                {
                        if(lastMouse.h>gMidPoint.h+100||lastMouse.h<gMidPoint.h-100||lastMouse.v>gMidPoint.v+100||lastMouse.v<gMidPoint.v-100){
                                pos.x = gMidPoint.h;
@@ -1042,6 +1120,7 @@ static void DoMouse(Game & game)
                        }
                }
        }
+#endif
 }
 
 
@@ -1183,6 +1262,12 @@ void CleanUp (void)
 
 #if USE_SDL
     SDL_Quit();
+    #define GL_FUNC(ret,fn,params,call,rt) p##fn = NULL;
+    #include "glstubs.h"
+    #undef GL_FUNC
+    // cheat here...static destructors are calling glDeleteTexture() after
+    //  the context is destroyed and libGL unloaded by SDL_Quit().
+    pglDeleteTextures = glDeleteTextures_doNothing;
 
 #elif (defined WIN32)
        if (hRC)
@@ -1254,7 +1339,8 @@ int main (void)
                        //ofstream os("log.txt");
                        //os.close();
 
-                       SetUp (game);
+                       if (!SetUp (game))
+                return 42;
 
                        while (!gDone&&!game.quit&&(!game.tryquit||!game.registered))
                        {
@@ -1263,7 +1349,9 @@ int main (void)
                                        gameFocused = true;
 
                                        // check windows messages
-                    #if USE_SDL
+                                       #if USE_SDL
+                                       game.deltah = 0;
+                                       game.deltav = 0;
                                        SDL_Event e;
                                        // message pump
                                        while( SDL_PollEvent( &e ) )
@@ -1273,9 +1361,10 @@ int main (void)
                                                        gDone=true;
                                                        break;
                                                }
-                        sdlEventProc(e);
+                                               sdlEventProc(e, game);
                                        }
-                    #elif (defined WIN32)
+
+                                       #elif (defined WIN32)
                                        MSG msg;
                                        // message pump
                                        while( PeekMessage( &msg, NULL, 0, 0, PM_REMOVE | PM_NOYIELD ) )
@@ -1291,7 +1380,7 @@ int main (void)
                                                        DispatchMessage( &msg );
                                                }
                                        }
-                    #endif
+                                       #endif
 
                                        // game
                                        DoUpdate(game);