/* 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 SDLCALL 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_APPINPUTFOCUS )
printf("input ");
if ( event->active.state & SDL_APPMOUSEFOCUS )
printf("mouse ");
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);
}