shithub: npe

ref: c40dabd91310f12d3e13687e890bf4274c7ddcfa
dir: npe/libnpe_sdl2/sdl2.c

#include "_sdl.h"

struct SDL_Window {
	int dummy;
};

struct SDL_Renderer {
	int dummy;
};

struct SDL_Texture {
	Memimage;
};

struct SDL_PixelFormat {
	int format;
};

struct SDL_Cursor {
	Image *i;
	Image *m;
	Point hot;
};

static SDL_PixelFormat argb8888 = {
	.format = SDL_PIXELFORMAT_ARGB8888,
};

static SDL_Window onewin;
static SDL_Renderer oneren;
static Memimage *back;
static u8int *backcopy;
static Image *front;
static int logiw, logih;
static int physw, physh;
static SDL_Cursor *oldcursor, *cursor;
static int showcursor = SDL_ENABLE;
static char basepath[PATH_MAX];
static u32int renddrawcol = DBlack;

struct npe_sdl npe_sdl = {0};

static Cursor nocursor = {
	{0, 0},
	{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	},
	{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	},
};


int
SDL_Init(int mask)
{
	/* FIXME actually use the mask? */
	USED(mask);

	if(getwd(basepath, sizeof(basepath)) == nil)
		strcpy(basepath, "/");

	if(mask == 0)
		return 0;

	if(memimageinit() < 0)
		goto err;
	if(initdraw(nil, nil, argv0) < 0)
		goto err;
	if(npe_sdl_init_input() != 0)
		goto err;

	return 0;
err:
	werrstr("SDL_Init: %r");
	return -1;
}

int
SDL_ShowCursor(int toggle)
{
	if(toggle == SDL_QUERY)
		return showcursor;

	showcursor = toggle == SDL_ENABLE;
	setcursor(npe_sdl.mctl, (cursor == nil && showcursor) ? nil : &nocursor);

	return showcursor;
}

u64int
SDL_GetPerformanceFrequency(void)
{
	return _tos->cyclefreq;
}

u64int
SDL_GetPerformanceCounter(void)
{
	u64int x;

	cycles(&x);

	return x;
}

char *
SDL_GetError(void)
{
	static char err[256];

	snprint(err, sizeof(err), "%r");

	return err;
}

static void *
readfile(char *path, int *got)
{
	void *data, *data2;
	int f, n, r, sz;

	if((f = open(path, OREAD|OCEXEC)) < 0)
		return nil;

	sz = 32768;
	data = nil;
	for(n = 0;; n += r){
		if(sz-n < 65536){
			sz *= 2;
			if((data2 = realloc(data, sz)) == nil)
				goto err;
			data = data2;
		}
		if((r = read(f, (char*)data+n, sz-n-1)) < 0)
			goto err;
		if(r == 0)
			break;
	}

	if(got != nil)
		*got = n;
	((char*)data)[n] = 0;

	return data;
err:
	free(data);
	close(f);
	return nil;
}

char *
SDL_GetClipboardText(void)
{
	return readfile("/dev/snarf", nil);
}

int
SDL_SetClipboardText(char *s)
{
	int f, n;

	n = -1;
	if((f = open("/dev/snarf", OWRITE|OTRUNC|OCEXEC)) >= 0){
		n = strlen(s);
		n = write(f, s, n) == n ? 0 : -1;
		close(f);
	}

	if(n != 0)
		werrstr("SDL_SetClipboardText: %r");

	return n;
}

SDL_Texture *
SDL_CreateTexture(SDL_Renderer *, Uint32 format, int, int w, int h)
{
	SDL_Texture *t;

	if(format != SDL_PIXELFORMAT_ARGB8888){
		werrstr("SDL_CreateTexture: only SDL_PIXELFORMAT_ARGB8888 is supported");
		goto err;
	}
	if((t = (SDL_Texture*)allocmemimage(Rect(0, 0, w, h), XRGB32)) == nil) /* FIXME ARGB32? */
		goto err;
	memfillcolor(t, DTransparent);

	return t;
err:
	werrstr("SDL_CreateTexture: %r");
	return nil;
}

SDL_Texture *
SDL_CreateTextureFromSurface(SDL_Renderer *r, SDL_Surface *s)
{
	SDL_Texture *t;
	SDL_Rect re;

	if((t = SDL_CreateTexture(r, s->format->format, 0, s->w, s->h)) != nil){
		re.x = 0;
		re.y = 0;
		re.w = s->w;
		re.h = s->h;
		SDL_UpdateTexture(t, &re, s->pixels, s->pitch);
	}

	return t;
}

int
SDL_UpdateTexture(SDL_Texture *t, SDL_Rect *re, void *pixels, int pitch)
{
	Rectangle r;

	r = re ? Rect(re->x, re->y, re->x+re->w, re->y+re->h) : t->r;
	/* FIXME non-ARGB8888 */
	/* FIXME pitch */ USED(pitch);
	if(loadmemimage(t, r, pixels, Dx(r)*Dy(r)*4) < 0){
		werrstr("SDL_UpdateTexture: %r");
		return -1;
	}

	return 0;
}

int
SDL_SetTextureAlphaMod(SDL_Texture *t, Uint8 alpha)
{
	/* FIXME */
	USED(t, alpha);

	return -1;
}

int
SDL_SetTextureColorMod(SDL_Texture *t, Uint8 r, Uint8 g, Uint8 b)
{
	/* FIXME */
	USED(t, r, g, b);

	return -1;
}

int
SDL_RenderClear(SDL_Renderer *)
{
	if(back != nil)
		memfillcolor(back, renddrawcol);

	return 0;
}

int
SDL_SetRenderDrawColor(SDL_Renderer *, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
{
	renddrawcol = r<<24 | g<<16 | b<<8 | a;

	return 0;
}

int
SDL_GetWindowDisplayIndex(SDL_Window *)
{
	return 0;
}

void
SDL_Quit(void)
{
	/* FIXME deinitialize */
}

void
SDL_free(void *p)
{
	free(p);
}

SDL_Surface *
SDL_CreateRGBSurface(Uint32, int w, int h, int bpp, Uint32 rm, Uint32 gm, Uint32 bm, Uint32 am)
{
	SDL_Surface *s;
	int n;

	USED(rm, gm, bm, am); /* FIXME masks */

	n = w*h*bpp/8;
	if((s = calloc(1, sizeof(*s)+n)) == nil){
		werrstr("SDL_CreateRGBSurface: memory");
		return nil;
	}
	s->format = &argb8888;
	s->w = w;
	s->h = h;
	s->pitch = w*bpp/8;
	s->clip_rect.x = 0;
	s->clip_rect.y = 0;
	s->clip_rect.w = w;
	s->clip_rect.h = h;

	return s;
}

SDL_Surface *
SDL_CreateRGBSurfaceFrom(Uint32 *pixels, int w, int h, int bpp, int pitch, Uint32 rm, Uint32 gm, Uint32 bm, Uint32 am)
{
	SDL_Surface *s;
	int n;

	USED(pitch); /* FIXME pitch */

	if((s = SDL_CreateRGBSurface(0, w, h, bpp, rm, gm, bm, am)) == nil)
		return nil;

	n = w*h*bpp/8;
	memmove(s->pixels, pixels, n);

	return s;
}

void
SDL_FreeSurface(SDL_Surface *surface)
{
	memset(surface, 0, sizeof(surface));
	free(surface);
}

Uint32
SDL_MapRGB(SDL_PixelFormat *, Uint8 r, Uint8 g, Uint8 b)
{
	return r<<24 | g<<16 | b<<8 | 0xff;
}

int
SDL_SetColorKey(SDL_Surface *s, int flag, Uint32 key)
{
	s->keyset = flag;
	s->key = key;
	return 0;
}

SDL_Cursor *
SDL_CreateColorCursor(SDL_Surface *s, int hot_x, int hot_y)
{
	SDL_Cursor *c;
	Rectangle r;
	uchar *m;
	int n;

	m = nil;
	if((c = calloc(1, sizeof(*c))) == nil){
		werrstr("memory");
		goto err;
	}

	r = Rect(0, 0, s->w, s->h);
	if(s->keyset){
		if((c->m = allocimage(display, r, GREY8, 0, DTransparent)) == nil)
			goto err;
		if((m = malloc(s->w * s->h)) == nil)
			goto err;
		for(n = 0; n < s->w * s->h; n++){
			m[n] = ((u32int*)s->pixels)[n] == s->key ? 0x00 : 0xff;
			if(m[n] == 0)
				((u32int*)s->pixels)[n] = 0;
		}
		if(loadimage(c->m, r, m, n) < 1)
			goto err;
		free(m);
		m = nil;
	}
	if((c->i = allocimage(display, r, s->keyset ? XRGB32 : ARGB32, 0, DTransparent)) == nil)
		goto err;
	n = s->w * s->h * 4; /* FIXME non-ARGB8888 */
	if(loadimage(c->i, r, s->pixels, n) < 1)
		goto err;

	c->hot = Pt(hot_x, hot_y);

	return c;
err:
	werrstr("SDL_CreateColorCursor: %r");
	if(c != nil){
		freeimage(c->i);
		freeimage(c->m);
	}
	free(c);
	free(m);
	return nil;
}

SDL_Cursor *
SDL_GetDefaultCursor(void)
{
	return nil;
}

SDL_Cursor *
SDL_CreateSystemCursor(SDL_SystemCursor id)
{
	/* FIXME */
	USED(id);

	return nil;
}

void
SDL_SetCursor(SDL_Cursor *c)
{
	if(cursor != c){
		cursor = c;
		npe_sdl.mredraw = 1;
		setcursor(npe_sdl.mctl, (cursor == nil && showcursor) ? nil : &nocursor);
	}
}

void
SDL_FreeCursor(SDL_Cursor *c)
{
	freeimage(c->i);
	free(c);
	if(cursor == c){
		oldcursor = nil;
		cursor = nil;
	}
}

void
SDL_WarpMouseInWindow(SDL_Window *, int x, int y)
{
	moveto(npe_sdl.mctl, Pt(screen->r.min.x+x, screen->r.min.y+y));
}

Uint32
SDL_GetGlobalMouseState(int *x, int *y)
{
	Uint32 b;

	if(x != nil)
		*x = npe_sdl.m.xy.x;
	if(y != nil)
		*y = npe_sdl.m.xy.y;

	b = 0;
	if(npe_sdl.m.buttons & 1)
		b |= SDL_BUTTON_LMASK;
	if(npe_sdl.m.buttons & 2)
		b |= SDL_BUTTON_MMASK;
	if(npe_sdl.m.buttons & 4)
		b |= SDL_BUTTON_RMASK;

	return b;
}

Uint32
SDL_GetMouseState(int *x, int *y)
{
	Uint32 b;

	b = SDL_GetGlobalMouseState(nil, nil);
	if(x != nil)
		*x = (npe_sdl.m.xy.x - screen->r.min.x) * logiw / physw;
	if(y != nil)
		*y = (npe_sdl.m.xy.y - screen->r.min.y) * logih / physh;

	return b;
}

void
SDL_RenderGetScale(SDL_Renderer *, float *scaleX, float *scaleY)
{
	*scaleX = 1.0;
	*scaleY = 1.0;
}

int
SDL_RenderSetIntegerScale(SDL_Renderer *, SDL_bool enable)
{
	/* FIXME */
	USED(enable);
	return 0;
}

void
SDL_GetWindowSize(SDL_Window *, int *w, int *h)
{
	/* no matter what rio decides */
	*w = physw;
	*h = physh;
}

void
SDL_GetWindowPosition(SDL_Window *, int *x, int *y)
{
	*x = screen->r.min.x;
	*y = screen->r.min.y;
}

SDL_bool
SDL_IsTextInputActive(void)
{
	return npe_sdl.textinput;
}

void
SDL_StartTextInput(void)
{
	npe_sdl.textinput = SDL_TRUE;
}

void
SDL_StopTextInput(void)
{
	npe_sdl.textinput = SDL_FALSE;
}

void
SDL_Delay(Uint32 ms)
{
	npe_nsleep((uvlong)ms*1000000ULL);
}

int
SDL_RenderCopy(SDL_Renderer *, SDL_Texture *t, SDL_Rect *sre, SDL_Rect *dre)
{
	Rectangle sr, dr;

	if(sre != nil){
		sr.min = Pt(sre->x, sre->y);
		sr.max = addpt(sr.min, Pt(sre->w, sre->h));
	}else
		sr = t->r;

	if(dre != nil){
		dr.min = Pt(dre->x, dre->y);
		dr.max = addpt(dr.min, Pt(dre->w, dre->h));
	}else /* stretch */
		dr = Rect(0, 0, logiw, logih);

	if(back == nil || Dx(back->r) != logiw || Dy(back->r) != logih){
		freememimage(back);
		back = allocmemimage(Rect(0, 0, logiw, logih), XRGB32);
		if(back == nil){
			werrstr("SDL_RenderCopy: %r");
			return -1;
		}
		free(backcopy);
		backcopy = malloc(logiw*logih*4);
	}

	if(dre == nil && (Dx(sr) != logiw || Dy(sr) != logih))
		npe_sdl_scale((u32int*)byteaddr(t, ZP), Dx(sr), Dy(sr), (u32int*)byteaddr(back, ZP), logiw, logih);
	else
		memimagedraw(back, dr, t, sr.min, nil, ZP, S);

	return 0;
}

void
SDL_RenderPresent(SDL_Renderer *)
{
	Rectangle r, clipr;
	static u32int *b;
	uchar *rb;

	if(!npe_sdl.fullredraw && (npe_sdl.fullredraw = memcmp(backcopy, byteaddr(back, ZP), logiw*logih*4)) == 0 && !npe_sdl.mredraw)
		return;

	r = Rect(0, 0, physw, physh);
	if(front != nil && (Dx(front->r) != physw || Dy(front->r) != physh)){
		freeimage(front);
		front = nil;
		free(b);
		b = nil;
	}
	if(b == nil && (b = realloc(b, physw*physh*4)) == nil){
		fprint(2, "SDL_RenderPresent: %r\n");
		return;
	}
	if(npe_sdl.fullredraw || front == nil){
		rb = npe_sdl_scale((u32int*)byteaddr(back, ZP), Dx(back->r), Dy(back->r), b, physw, physh);
		if(front == nil && (front = allocimage(display, r, XRGB32, 0, DNofill)) == nil){
			fprint(2, "SDL_RenderPresent: %r\n");
			return;
		}
		if(loadimage(front, r, rb, Dx(r)*Dy(r)*4) < 0){
			fprint(2, "SDL_RenderPresent: %r\n");
			return;
		}
	}

	if(cursor != nil && showcursor){
		r.min = subpt(npe_sdl.m.xy, cursor->hot);
		r.max = addpt(r.min, cursor->i->r.max);
		if(!npe_sdl.fullredraw && oldcursor != nil){
			clipr.min = subpt(npe_sdl.om.xy, oldcursor->hot);
			clipr.max = addpt(clipr.min, oldcursor->i->r.max);
			combinerect(&clipr, r);
			replclipr(screen, 0, clipr);
		}
	}
	draw(screen, screen->r, front, nil, ZP);
	if(cursor != nil && showcursor)
		draw(screen, r, cursor->i, cursor->m, ZP);
	npe_sdl.mredraw = 0;
	npe_sdl.om.xy = npe_sdl.m.xy;
	oldcursor = cursor;

	flushimage(display, 1);

	if(npe_sdl.fullredraw)
		memmove(backcopy, byteaddr(back, ZP), logiw*logih*4);
	else
		replclipr(screen, 0, screen->r);
	npe_sdl.fullredraw = 0;
}

Uint32
SDL_GetWindowFlags(SDL_Window *)
{
	/* FIXME is this correct? */
	return SDL_WINDOW_INPUT_FOCUS;
}

int
SDL_RenderSetLogicalSize(SDL_Renderer *, int w, int h)
{
	if(logiw != w || logih != h){
		logiw = w;
		logih = h;
		npe_sdl.fullredraw = 1;
	}

	return 0;
}

int
SDL_GetRendererOutputSize(SDL_Renderer *, int *w, int *h)
{
	if(w != nil)
		*w = logiw;
	if(h != nil)
		*h = logih;

	return 0;
}

void
SDL_SetWindowSize(SDL_Window *, int w, int h)
{
	int f, n;

	if(physw != w || physh != h){
		physw = w;
		physh = h;
		if((f = open("/dev/wctl", OWRITE|OCEXEC)) >= 0){
			n = fprint(f, "resize -dx %d -dy %d", w+Borderwidth*2, h+Borderwidth*2);
			close(f);
			if(n > 0){
				getwindow(display, Refnone);
				npe_sdl.fullredraw = 1;
			}
		}
	}
}

int
SDL_ShowSimpleMessageBox(Uint32, char *title, char *message, SDL_Window *)
{
	/* FIXME display a GUI window? */
	fprint(2, "%s: %s\n", title, message);
	return 0;
}

int
SDL_SetWindowFullscreen(SDL_Window *, Uint32)
{
	/* FIXME again, ft2 does NOT check the error code, figure something out */
	werrstr("SDL_SetWindowFullscreen: not implemented");
	return -1;
}

void
SDL_SetWindowGrab(SDL_Window *, SDL_bool grabbed)
{
	/* FIXME not sure if it's worth anything */
	USED(grabbed);
}

void
SDL_SetWindowPosition(SDL_Window *, int x, int y)
{
	int f, n;

	if((f = open("/dev/wctl", OWRITE|OCEXEC)) >= 0){
		n = fprint(f, "move -minx %d -miny %d", x, y);
		close(f);
		if(n > 0){
			getwindow(display, Refnone);
			npe_sdl.fullredraw = 1;
		}
	}
}

int
SDL_GetDesktopDisplayMode(int displayIndex, SDL_DisplayMode *mode)
{
	if(displayIndex != 0)
		return -1;

	mode->w = physw;
	mode->h = physh;
	mode->format = SDL_PIXELFORMAT_ARGB8888;
	mode->refresh_rate = 0;

	return 0;
}

int
SDL_GetCurrentDisplayMode(int displayIndex, SDL_DisplayMode *mode)
{
	return SDL_GetDesktopDisplayMode(displayIndex, mode);
}

void
SDL_SetWindowTitle(SDL_Window *, char *title)
{
	int f;

	if((f = open("/dev/label", OWRITE|OTRUNC|OCEXEC)) >= 0 || (f = open("/mnt/term/dev/label", OWRITE|OTRUNC|OCEXEC)) >= 0){
		write(f, title, strlen(title));
		close(f);
	}
}

void
SDL_DestroyTexture(SDL_Texture *t)
{
	freememimage(t);
}

int
SDL_SetTextureBlendMode(SDL_Texture *, SDL_BlendMode blendMode)
{
	if(blendMode != SDL_BLENDMODE_NONE){
		werrstr("SDL_SetTextureBlendMode: only SDL_BLENDMODE_NONE is supported");
		return -1;
	}

	return 0;
}

SDL_bool
SDL_SetHint(char *name, char *value)
{
	/* FIXME anyone cares about name="SDL_RENDER_SCALE_QUALITY" value="(best|nearest)"? */
	if(strcmp(name, SDL_HINT_WINDOWS_NO_CLOSE_ON_ALT_F4) == 0){
		npe_sdl.hints = (npe_sdl.hints & ~Altf4noclose) | (atoi(value) ? Altf4noclose : 0);
		return SDL_TRUE;
	}

	return SDL_FALSE;
}

SDL_Window *
SDL_CreateWindow(char *title, int x, int y, int w, int h, Uint32)
{
	SDL_SetWindowTitle(&onewin, title);
	SDL_SetWindowSize(&onewin, w, h);

	if(x != SDL_WINDOWPOS_UNDEFINED && y != SDL_WINDOWPOS_UNDEFINED){ /* FIXME either of these can be undefined */
		if(x == SDL_WINDOWPOS_CENTERED)
			x = display->image->r.min.x + (Dx(display->image->r) - w)/2;
		if(y == SDL_WINDOWPOS_CENTERED)
			y = display->image->r.min.y + (Dx(display->image->r) - w)/2;
		SDL_SetWindowPosition(&onewin, x, y);
	}

	return &onewin;
}

SDL_Renderer *
SDL_CreateRenderer(SDL_Window *, int, Uint32)
{
	SDL_RenderSetLogicalSize(nil, physw, physh);
	return &oneren;
}

int
SDL_SetRenderDrawBlendMode(SDL_Renderer *, SDL_BlendMode blendMode)
{
	if(blendMode != SDL_BLENDMODE_NONE){
		werrstr("SDL_SetRenderDrawBlendMode: only SDL_BLENDMODE_NONE is supported");
		return -1;
	}

	return 0;
}

char *
SDL_GetCurrentVideoDriver(void)
{
	return "/dev/draw";
}

Uint32
SDL_GetTicks(void)
{
	return npe_nanosec()/1000000ULL;
}

int
SDL_OpenURL(char *url)
{
	char tmp[PATH_MAX];
	Plumbmsg m;
	int f, r;

	if((f = plumbopen("send", OWRITE|OCEXEC)) < 0)
		return -1;

	memset(&m, 0, sizeof(m));
	m.src = argv0;
	m.wdir = getwd(tmp, sizeof(tmp));
	m.type = "text";
	m.data = url;
	m.ndata = -1;
	r = plumbsend(f, &m);
	close(f);

	return r;
}

char *
SDL_GetBasePath(void)
{
	return strdup(basepath);
}

char *
SDL_GetPrefPath(char *org, char *app)
{
	char *home, *p;

	p = nil;
	if((home = getenv("home")) != nil){
		if((p = smprint("%s/lib/%s/%s", home, org, app)) != nil)
			npe_mkdirp(cleanname(p), 0755);
		free(home);
	}

	return p;
}

SDL_bool
SDL_HasClipboardText(void)
{
	/* most def */
	return SDL_TRUE;
}

void
SDL_RestoreWindow(SDL_Window *)
{
	/* nothing to do here */
}

void
SDL_RaiseWindow(SDL_Window *)
{
	/* nothing to do here */
}

void
SDL_ShowWindow(SDL_Window *)
{
	/* nothing to do here */
}

int
SDL_SetSurfaceRLE(SDL_Surface *, int)
{
	/* nothing to do here */
	return 0;
}

int
SDL_SetSurfaceBlendMode(SDL_Surface *, SDL_BlendMode blendMode)
{
	if(blendMode != SDL_BLENDMODE_NONE){
		werrstr("SDL_SetSurfaceBlendMode: only SDL_BLENDMODE_NONE is supported");
		return -1;
	}

	return 0;
}

int
SDL_LockSurface(SDL_Surface *)
{
	/* nothing to do here */
	return 0;
}

int
SDL_UnlockSurface(SDL_Surface *)
{
	/* nothing to do here */
	return 0;
}

void
SDL_DestroyRenderer(SDL_Renderer *)
{
	/* nothing to do here */
}

void
SDL_DestroyWindow(SDL_Window *)
{
}

SDL_bool
SDL_HasSSE(void)
{
	/* it's not like we have builtins anyway */
	return SDL_FALSE;
}

SDL_bool
SDL_HasSSE2(void)
{
	/* it's not like we have builtins anyway */
	return SDL_FALSE;
}

void
SDL_EnableScreenSaver(void)
{
}

int
SDL_SaveBMP(SDL_Surface *s, const char *file)
{
	/* FIXME implement this */
	USED(s, file);

	return -1;
}

void
SDL_ClearError(void)
{
}