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mouse grab

--- a/include/npe/SDL2/SDL.h

+++ b/include/npe/SDL2/SDL.h

@@ -66,6 +66,7 @@

 int SDL_SetRelativeMouseMode(SDL_bool enabled);

 int SDL_GetRelativeMouseMode(void);

 void SDL_SetWindowIcon(SDL_Window*,SDL_Surface*);

+void SDL_SetWindowBordered(SDL_Window*,SDL_bool);

 SDL_Keymod SDL_GetModState(void);

 int SDL_ShowCursor(int toggle);

 Uint64 SDL_GetPerformanceFrequency(void);

@@ -155,6 +156,7 @@

 int SDL_FillRect(SDL_Surface *dst, const SDL_Rect *rect, Uint32 color);

 int SDL_SetPaletteColors(SDL_Palette *palette, const SDL_Color *colors, int firstcolor, int ncolors);

 int SDL_BlitSurface(SDL_Surface *src, const SDL_Rect *srcrect, SDL_Surface *dst, SDL_Rect *dstrect);

+int SDL_SoftStretch(SDL_Surface *src, const SDL_Rect *srcrect, SDL_Surface *dst, const SDL_Rect *dstrect);

 enum {

 	SDL_QUERY = -1,

@@ -177,7 +179,7 @@

 	SDL_INIT_TIMER = 1<<0,

 	SDL_INIT_AUDIO = 1<<1,

 	SDL_INIT_VIDEO = 1<<2,

-	SDL_INIT_JOYSTICK = 1<<3,

+	SDL_INIT_JOYSTICK = 0,

 	SDL_BLENDMODE_NONE = 0,

 	SDL_BLENDMODE_BLEND,

@@ -195,9 +197,12 @@

 	/* shit no one cares about */

 	SDL_TEXTUREACCESS_STREAMING = 0,

 	SDL_TEXTUREACCESS_STATIC = 0,

+	SDL_TEXTUREACCESS_TARGET = 0,

 	SDL_RENDERER_ACCELERATED = 0,

 	SDL_RENDERER_PRESENTVSYNC = 0,

 	SDL_INIT_NOPARACHUTE = 0,

+	SDL_RENDERER_SOFTWARE = 0,

+	SDL_SWSURFACE = 0,

 	/* FIXME steal from rio and add missing? */

 	SDL_SYSTEM_CURSOR_ARROW = 0,

--- a/include/npe/SDL2/SDL_events.h

+++ b/include/npe/SDL2/SDL_events.h

@@ -28,6 +28,7 @@

 	SDL_WINDOWEVENT_RESTORED,

 	SDL_WINDOWEVENT_ENTER,

 	SDL_WINDOWEVENT_LEAVE,

+	SDL_WINDOWEVENT_CLOSE,

 	SDL_JOYBALLMOTION,

 	SDL_PRESSED = SDL_KEYDOWN,

--- a/libnpe_sdl2/_sdl.h

+++ b/libnpe_sdl2/_sdl.h

@@ -12,6 +12,9 @@

 struct npe_sdl {

 	Mousectl *mctl;

+	Rectangle grabout;

+	Point center;

+	int mgrab;

 	Mouse m, om;

 	int hints;

 	int mredraw;

--- a/libnpe_sdl2/events.c

+++ b/libnpe_sdl2/events.c

@@ -28,6 +28,7 @@

 static int rune2scancode(Rune r);

 static void kbdproc(void *);

+static void mouseproc(void *);

 int

 npe_sdl_init_input(void)

@@ -37,13 +38,16 @@

 	salt[Ckey].c = chancreate(sizeof(Rune), 20);

 	salt[Ckeytype].c = chancreate(sizeof(int), 20);

-	salt[Cmouse].c = npe_sdl.mctl->c;

+	salt[Cmouse].c = chancreate(sizeof(Mouse), 20);

 	salt[Cresize].c = npe_sdl.mctl->resizec;

 	kctl.c = salt[Ckey].c; /* for enter() */

-	if(salt[Ckey].c == nil || salt[Ckeytype].c == nil || proccreate(kbdproc, nil, 4096) < 0)

+	if(salt[Ckey].c == nil || salt[Ckeytype].c == nil || salt[Cmouse].c == nil)

 		return -1;

+	if(proccreate(kbdproc, nil, 4096) < 0 || proccreate(mouseproc, nil, 4096) < 0)

+		return -1;

+

 	return 0;

 }

@@ -130,9 +134,13 @@

 	case Cmouse:

 		if(screen == nil)

 			break;

+

 		memset(e, 0, sizeof(*e));

 		e->motion.x = (npe_sdl.m.xy.x - screen->r.min.x) * npe_sdl.scale;

 		e->motion.y = (npe_sdl.m.xy.y - screen->r.min.y) * npe_sdl.scale;

+		e->motion.xrel = (npe_sdl.m.xy.x - npe_sdl.om.xy.x) * npe_sdl.scale;

+		e->motion.yrel = (npe_sdl.m.xy.y - npe_sdl.om.xy.y) * npe_sdl.scale;

+

 		if(!eqpt(npe_sdl.m.xy, npe_sdl.om.xy)){

 			npe_sdl.mredraw = 1;

 			if(npe_sdl.m.buttons == npe_sdl.om.buttons){

@@ -352,4 +360,22 @@

 	}

 	threadexits(nil);

+}

+

+static void

+mouseproc(void *)

+{

+	Mouse m;

+	for(;;){

+		recv(npe_sdl.mctl->c, &m);

+		if(npe_sdl.mgrab == SDL_TRUE){

+			if(!ptinrect(m.xy, npe_sdl.grabout)){

+				moveto(npe_sdl.mctl, npe_sdl.center);

+				npe_sdl.m.xy = npe_sdl.center;

+				npe_sdl.om.xy = npe_sdl.center;

+				continue; /* swallow */

+			}

+		}

+		send(salt[Cmouse].c, &m);

+	}

 }

--- a/libnpe_sdl2/sdl2.c

+++ b/libnpe_sdl2/sdl2.c

@@ -77,6 +77,12 @@

 	USED(w); USED(icon);

 }

+void

+SDL_SetWindowBordered(SDL_Window *w, SDL_bool flag)

+{

+	USED(w); USED(flag);

+}

+

 int

 SDL_Init(int mask)

 {

@@ -940,6 +946,8 @@

 		if(n > 0){

 			getwindow(display, Refnone);

 			npe_sdl.fullredraw = 1;

+			npe_sdl.grabout = insetrect(screen->r, Dx(screen->r)/8);

+			npe_sdl.center = addpt(screen->r.min, Pt(Dx(screen->r)/2, Dy(screen->r)/2));

 		}

 	}

 }

@@ -1319,7 +1327,13 @@

 int

 SDL_SetRelativeMouseMode(SDL_bool enabled)

 {

-	/* FIXME implement mouse grab */

+	npe_sdl.grabout = insetrect(screen->r, Dx(screen->r)/8);

+	npe_sdl.center = addpt(screen->r.min, Pt(Dx(screen->r)/2, Dy(screen->r)/2));

+	npe_sdl.mgrab = enabled;

+	if(enabled)

+		SDL_ShowCursor(0);

+	else

+		SDL_ShowCursor(1);

 	return 0;

 }

@@ -1331,7 +1345,7 @@

 int

 SDL_GetRelativeMouseMode(void)

 {

-	return SDL_FALSE;

+	return npe_sdl.mgrab;

 }

 SDL_mutex*