view test/testwm.c @ 1768:814f9f2c7a33

Fixed bug #80 Date: 21 Apr 2003 17:20:20 +0100 From: Alan Swanson <swanson@uklinux.net> Subject: [SDL] New XFree 4.3 Video Mode Patch If you look at the unsorted list of modes returned by X, here's mine; 1280 x 1024 @ 85.0 > 1024 x 768 @ 100.3 > USER 800 x 600 @ 125.5 > SET 640 x 480 @ 124.9 > 1280 x 1024 @ 75.0 ] 1280 x 1024 @ 60.0 ] 1280 x 960 @ 85.0 ] X11 1280 x 960 @ 60.0 ] AUTO 1152 x 864 @ 75.0 ]=20 1152 x 768 @ 54.8 ] 960 x 720 @ 120.0 ] ... 640 x 400 @ 85.1 ] 256k 576 x 432 @ 150.0 ] 249k PIXEL 640 x 350 @ 85.1 ] 224k COUNT 576 x 384 @ 109.6 ] 221k ... The user set modes come first followed by X set modes which are ordered by decreasing number of pixels and refresh. The reason why every other library or program not using SDL working is due to SDL scanning the modes in reverse getting X11 provided modes modes with the lowest refresh.
author Sam Lantinga <slouken@libsdl.org>
date Fri, 05 May 2006 05:50:26 +0000
parents 08e3393e9ffb
children 14717b52abc0 290b5baf2fca
line wrap: on
line source


/* Test out the window manager interaction functions */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "SDL.h"

/* Is the cursor visible? */
static int visible = 1;

static Uint8  video_bpp;
static Uint32 video_flags;

/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
static void quit(int rc)
{
	SDL_Quit();
	exit(rc);
}

int SetVideoMode(int w, int h)
{
	SDL_Surface *screen;
	int i;
	Uint8 *buffer;
	SDL_Color palette[256];

	screen = SDL_SetVideoMode(w, h, video_bpp, video_flags);
	if (  screen == NULL ) {
		fprintf(stderr, "Couldn't set %dx%dx%d video mode: %s\n",
					w, h, video_bpp, SDL_GetError());
		return(-1);
	}
	printf("Running in %s mode\n", screen->flags & SDL_FULLSCREEN ?
						"fullscreen" : "windowed");

	/* 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());
		return(-1);
	}
	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);

	return(0);
}

SDL_Surface *LoadIconSurface(char *file, Uint8 **maskp)
{
	SDL_Surface *icon;
	Uint8       *pixels;
	Uint8       *mask;
	int          mlen, i, j;

	*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 + 7) / 8;
	mask = (Uint8 *)malloc(mlen);
	if ( mask == NULL ) {
		fprintf(stderr, "Out of memory!\n");
		SDL_FreeSurface(icon);
		return(NULL);
	}
	memset(mask, 0, mlen);
	for ( i=0; i < icon->h; i++)
        for (j=0; j < icon->w; j++) {
            int pindex = i * icon->pitch + j;
            int mindex = i * icon->w + j;
            if ( pixels[pindex] != *pixels )
                mask[mindex>>3] |= 1 << (7 - (mindex & 7));
        }
	*maskp = mask;
	return(icon);
}

void HotKey_ToggleFullScreen(void)
{
	SDL_Surface *screen;

	screen = SDL_GetVideoSurface();
	if ( SDL_WM_ToggleFullScreen(screen) ) {
		printf("Toggled fullscreen mode - now %s\n",
		    (screen->flags&SDL_FULLSCREEN) ? "fullscreen" : "windowed");
	} else {
		printf("Unable to toggle fullscreen mode\n");
		video_flags ^= SDL_FULLSCREEN;
		SetVideoMode(screen->w, screen->h);
	}
}

void HotKey_ToggleGrab(void)
{
	SDL_GrabMode mode;

	printf("Ctrl-G: toggling input grab!\n");
	mode = SDL_WM_GrabInput(SDL_GRAB_QUERY);
	if ( mode == SDL_GRAB_ON ) {
		printf("Grab was on\n");
	} else {
		printf("Grab was off\n");
	}
	mode = SDL_WM_GrabInput(mode ? SDL_GRAB_OFF : SDL_GRAB_ON);
	if ( mode == SDL_GRAB_ON ) {
		printf("Grab is now on\n");
	} else {
		printf("Grab is now off\n");
	}
}

void HotKey_Iconify(void)
{
	printf("Ctrl-Z: iconifying window!\n");
	SDL_WM_IconifyWindow();
}

void HotKey_Quit(void)
{
	SDL_Event event;

	printf("Posting internal quit request\n");
	event.type = SDL_USEREVENT;
	SDL_PushEvent(&event);
}

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);

		/* We want to toggle visibility on buttonpress */
		case SDL_MOUSEBUTTONDOWN:
		case SDL_MOUSEBUTTONUP:
			if ( event->button.state == SDL_PRESSED ) {
				visible = !visible;
				SDL_ShowCursor(visible);
			}
			printf("Mouse button %d has been %s\n",
				event->button.button,
				(event->button.state == SDL_PRESSED) ?
						"pressed" : "released");
			return(0);

		/* Show relative mouse motion */
		case SDL_MOUSEMOTION:
#if 0
			printf("Mouse motion: {%d,%d} (%d,%d)\n",
				event->motion.x, event->motion.y,
				event->motion.xrel, event->motion.yrel);
#endif
			return(0);

		case SDL_KEYDOWN:
			if ( event->key.keysym.sym == SDLK_ESCAPE ) {
				HotKey_Quit();
			}
			if ( (event->key.keysym.sym == SDLK_g) &&
			     (event->key.keysym.mod & KMOD_CTRL) ) {
				HotKey_ToggleGrab();
			}
			if ( (event->key.keysym.sym == SDLK_z) &&
			     (event->key.keysym.mod & KMOD_CTRL) ) {
				HotKey_Iconify();
			}
			if ( (event->key.keysym.sym == SDLK_RETURN) &&
			     (event->key.keysym.mod & KMOD_ALT) ) {
				HotKey_ToggleFullScreen();
			}
			return(0);

		/* Pass the video resize event through .. */
		case SDL_VIDEORESIZE:
			return(1);

		/* 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);

		/* This will never happen because events queued directly
		   to the event queue are not filtered.
		 */
		case SDL_USEREVENT:
			return(1);

		/* Drop all other events */
		default:
			return(0);
	}
}

int main(int argc, char *argv[])
{
	SDL_Event event;
	char *title;
	SDL_Surface *icon;
	Uint8 *icon_mask;
	int parsed;
	int w, h;

	if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
		fprintf(stderr,
			"Couldn't initialize SDL: %s\n", SDL_GetError());
		return(1);
	}

	/* Check command line arguments */
	w = 640;
	h = 480;
	video_bpp = 8;
	video_flags = SDL_SWSURFACE;
	parsed = 1;
	while ( parsed ) {
		if ( (argc >= 2) && (strcmp(argv[1], "-fullscreen") == 0) ) {
			video_flags |= SDL_FULLSCREEN;
			argc -= 1;
			argv += 1;
		} else
		if ( (argc >= 2) && (strcmp(argv[1], "-resize") == 0) ) {
			video_flags |= SDL_RESIZABLE;
			argc -= 1;
			argv += 1;
		} else
		if ( (argc >= 2) && (strcmp(argv[1], "-noframe") == 0) ) {
			video_flags |= SDL_NOFRAME;
			argc -= 1;
			argv += 1;
		} else
		if ( (argc >= 3) && (strcmp(argv[1], "-width") == 0) ) {
			w = atoi(argv[2]);
			argc -= 2;
			argv += 2;
		} else
		if ( (argc >= 3) && (strcmp(argv[1], "-height") == 0) ) {
			h = atoi(argv[2]);
			argc -= 2;
			argv += 2;
		} else
		if ( (argc >= 3) && (strcmp(argv[1], "-bpp") == 0) ) {
			video_bpp = atoi(argv[2]);
			argc -= 2;
			argv += 2;
		} else {
			parsed = 0;
		}
	}

	/* 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);

	/* Set the title bar */
	if ( argv[1] == NULL )
		title = "Testing  1.. 2.. 3...";
	else
		title = argv[1];
	SDL_WM_SetCaption(title, "testwm");

	/* See if it's really set */
	SDL_WM_GetCaption(&title, NULL);
	if ( title )
		printf("Title was set to: %s\n", title);
	else
		printf("No window title was set!\n");

	/* Initialize the display */
	if ( SetVideoMode(w, h) < 0 ) {
		quit(1);
	}

	/* Set an event filter that discards everything but QUIT */
	SDL_SetEventFilter(FilterEvents);

	/* Ignore key up events, they don't even get filtered */
	SDL_EventState(SDL_KEYUP, SDL_IGNORE);

	/* Loop, waiting for QUIT */
	while ( SDL_WaitEvent(&event) ) {
		switch (event.type) {
			case SDL_VIDEORESIZE:
				printf("Got a resize event: %dx%d\n",
				       event.resize.w, event.resize.h);
				SetVideoMode(event.resize.w, event.resize.h);
				break;
			case SDL_USEREVENT:
				printf("Handling internal quit request\n");
				/* Fall through to the quit handler */
			case SDL_QUIT:
				printf("Bye bye..\n");
				quit(0);
			default:
				/* This should never happen */
				printf("Warning: Event %d wasn't filtered\n",
								event.type);
				break;
		}
	}
	printf("SDL_WaitEvent() error: %s\n", SDL_GetError());
	SDL_Quit();
	return(255);
}