/* Test out the multi-threaded event handling functions */

#include <stdlib.h>

#include <stdio.h>

#include <string.h>

#include "SDL.h"

#include "SDL_thread.h"

/* Are we done yet? */

static int done = 0;

/* Is the cursor visible? */

static int visible = 1;

SDL_Surface *LoadIconSurface(char *file, Uint8 **maskp)

{

	SDL_Surface *icon;

	Uint8       *pixels;

	Uint8       *mask;

	int          mlen, i;

	*maskp = NULL;

	/* Load the icon surface */

	icon = SDL_LoadBMP(file);

	if ( icon == NULL ) {

		fprintf(stderr, "Couldn't load %s: %s\n", file, SDL_GetError());

		return(NULL);

	}

	/* Check width and height */

	if ( (icon->w%8) != 0 ) {

		fprintf(stderr, "Icon width must be a multiple of 8!\n");

		SDL_FreeSurface(icon);

		return(NULL);

	}

	if ( icon->format->palette == NULL ) {

		fprintf(stderr, "Icon must have a palette!\n");

		SDL_FreeSurface(icon);

		return(NULL);

	}

	/* Set the colorkey */

	SDL_SetColorKey(icon, SDL_SRCCOLORKEY, *((Uint8 *)icon->pixels));

	/* Create the mask */

	pixels = (Uint8 *)icon->pixels;

	printf("Transparent pixel: (%d,%d,%d)\n",

				icon->format->palette->colors[*pixels].r,

				icon->format->palette->colors[*pixels].g,

				icon->format->palette->colors[*pixels].b);

	mlen = icon->w*icon->h;

	mask = (Uint8 *)malloc(mlen/8);

	if ( mask == NULL ) {

		fprintf(stderr, "Out of memory!\n");

		SDL_FreeSurface(icon);

		return(NULL);

	}

	memset(mask, 0, mlen/8);

	for ( i=0; i<mlen; ) {

		if ( pixels[i] != *pixels )

			mask[i/8] |= 0x01;

		++i;

		if ( (i%8) != 0 )

			mask[i/8] <<= 1;

	}

	*maskp = mask;

	return(icon);

}

int FilterEvents(const SDL_Event *event)

{

	static int reallyquit = 0;

	switch (event->type) {

		case SDL_ACTIVEEVENT:

			/* See what happened */

			printf("App %s ",

				event->active.gain ? "gained" : "lost");

			if ( event->active.state & SDL_APPACTIVE )

				printf("active ");

			if ( event->active.state & SDL_APPMOUSEFOCUS )

				printf("mouse ");

			if ( event->active.state & SDL_APPINPUTFOCUS )

				printf("input ");

			printf("focus\n");

			/* See if we are iconified or restored */

			if ( event->active.state & SDL_APPACTIVE ) {

				printf("App has been %s\n",

					event->active.gain ?

						 "restored" : "iconified");

			}

			return(0);

		/* This is important!  Queue it if we want to quit. */

		case SDL_QUIT:

			if ( ! reallyquit ) {

				reallyquit = 1;

				printf("Quit requested\n");

				return(0);

			}

			printf("Quit demanded\n");

			return(1);

		/* Mouse and keyboard events go to threads */

		case SDL_MOUSEMOTION:

		case SDL_MOUSEBUTTONDOWN:

		case SDL_MOUSEBUTTONUP:

		case SDL_KEYDOWN:

		case SDL_KEYUP:

			return(1);

		/* Drop all other events */

		default:

			return(0);

	}

}

int HandleMouse(void *unused)

{

	SDL_Event events[10];

	int i, found;

	Uint32 mask;

	/* Handle mouse events here */

	mask = (SDL_MOUSEMOTIONMASK|SDL_MOUSEBUTTONDOWNMASK|SDL_MOUSEBUTTONUPMASK);

	while ( ! done ) {

		found = SDL_PeepEvents(events, 10, SDL_GETEVENT, mask);

		for ( i=0; i<found; ++i ) {

			switch(events[i].type) {

				/* We want to toggle visibility on buttonpress */

				case SDL_MOUSEBUTTONDOWN:

				case SDL_MOUSEBUTTONUP:

					if ( events[i].button.state == SDL_PRESSED ) {

						visible = !visible;

						SDL_ShowCursor(visible);

					}

					printf("Mouse button %d has been %s\n",

						events[i].button.button,

						(events[i].button.state == SDL_PRESSED) ?

						"pressed" : "released");

					break;

				/* Show relative mouse motion */

				case SDL_MOUSEMOTION:

					printf("Mouse relative motion: {%d,%d}\n",

							events[i].motion.xrel, events[i].motion.yrel);

					break;

			}

		}

		/* Give up some CPU to allow events to arrive */

		SDL_Delay(20);

	}

	return(0);

}

int HandleKeyboard(void *unused)

{

	SDL_Event events[10];

	int i, found;

	Uint32 mask;

	/* Handle mouse events here */

	mask = (SDL_KEYDOWNMASK|SDL_KEYUPMASK);

	while ( ! done ) {

		found = SDL_PeepEvents(events, 10, SDL_GETEVENT, mask);

		for ( i=0; i<found; ++i ) {

			switch(events[i].type) {

			    /* We want to toggle visibility on buttonpress */

			    case SDL_KEYDOWN:

			    case SDL_KEYUP:

			    	/* Allow hitting <ESC> to quit the app */

			    	if ( events[i].key.keysym.sym == SDLK_ESCAPE ) {

			    		done = 1;

			    	}

			    	printf("Key '%c' has been %s\n",

						events[i].key.keysym.unicode,

					(events[i].key.state == SDL_PRESSED) ?

						"pressed" : "released");

			    	break;

			}

		}

		/* Give up some CPU to allow events to arrive */

		SDL_Delay(20);

	}

	return(0);

}

int main(int argc, char *argv[])

{

	SDL_Surface *screen;

	SDL_Surface *icon;

	Uint8 *icon_mask;

	int i, parsed;

	Uint8 *buffer;

	SDL_Color palette[256];

	Uint32 init_flags;

	Uint8  video_bpp;

	Uint32 video_flags;

	SDL_Thread *mouse_thread;

	SDL_Thread *keybd_thread;

	/* Set the options, based on command line arguments */

	init_flags = SDL_INIT_VIDEO;

	video_bpp = 8;

	video_flags = SDL_SWSURFACE;

	parsed = 1;

	while ( parsed ) {

		/* If the threaded option is enabled, and the SDL library hasn't

		   been compiled with threaded events enabled, then the mouse and

		   keyboard won't respond.

		 */

		if ( (argc >= 2) && (strcmp(argv[1], "-threaded") == 0) ) {

			init_flags |= SDL_INIT_EVENTTHREAD;

			argc -= 1;

			argv += 1;

			printf("Running with threaded events\n");

		} else

		if ( (argc >= 2) && (strcmp(argv[1], "-fullscreen") == 0) ) {

			video_flags |= SDL_FULLSCREEN;

			argc -= 1;

			argv += 1;

		} else

		if ( (argc >= 3) && (strcmp(argv[1], "-bpp") == 0) ) {

			video_bpp = atoi(argv[2]);

			argc -= 2;

			argv += 2;

		} else {

			parsed = 0;

		}

	}

	/* Initialize SDL with the requested flags */

	if ( SDL_Init(init_flags) < 0 ) {

		fprintf(stderr,

			"Couldn't initialize SDL: %s\n", SDL_GetError());

		exit(1);

	}

	atexit(SDL_Quit);

	/* Set the icon -- this must be done before the first mode set */

	icon = LoadIconSurface("icon.bmp", &icon_mask);

	if ( icon != NULL ) {

		SDL_WM_SetIcon(icon, icon_mask);

	}

	if ( icon_mask != NULL )

		free(icon_mask);

	/* Initialize the display */

	screen = SDL_SetVideoMode(640, 480, video_bpp, video_flags);

	if (  screen == NULL ) {

		fprintf(stderr, "Couldn't set 640x480x%d video mode: %s\n",

						video_bpp, SDL_GetError());

		exit(1);

	}

	printf("Running in %s mode\n", screen->flags & SDL_FULLSCREEN ?

						"fullscreen" : "windowed");

	/* Enable printable characters */

	SDL_EnableUNICODE(1);

	/* Set an event filter that discards everything but QUIT */

	SDL_SetEventFilter(FilterEvents);

	/* Create the event handling threads */

	mouse_thread = SDL_CreateThread(HandleMouse, NULL);

	keybd_thread = SDL_CreateThread(HandleKeyboard, NULL);

	/* Set the surface pixels and refresh! */

	for ( i=0; i<256; ++i ) {

		palette[i].r = 255-i;

		palette[i].g = 255-i;

		palette[i].b = 255-i;

	}

	SDL_SetColors(screen, palette, 0, 256);

	if ( SDL_LockSurface(screen) < 0 ) {

		fprintf(stderr, "Couldn't lock display surface: %s\n",

							SDL_GetError());

		exit(2);

	}

	buffer = (Uint8 *)screen->pixels;

	for ( i=0; i<screen->h; ++i ) {

		memset(buffer,(i*255)/screen->h,

				screen->w*screen->format->BytesPerPixel);

		buffer += screen->pitch;

	}

	SDL_UnlockSurface(screen);

	SDL_UpdateRect(screen, 0, 0, 0, 0);

	/* Loop, waiting for QUIT */

	while ( ! done ) {

		if ( ! (init_flags & SDL_INIT_EVENTTHREAD) ) {

			SDL_PumpEvents(); /* Needed when event thread is off */

		}

		if ( SDL_PeepEvents(NULL, 0, SDL_PEEKEVENT, SDL_QUITMASK) ) {

			done = 1;

		}

		/* Give up some CPU so the events can accumulate */

		SDL_Delay(20);

	}

	SDL_WaitThread(mouse_thread, NULL);

	SDL_WaitThread(keybd_thread, NULL);

	return(0);

}