hello,
I’d like to create a splash screen where I’ll put “loading datas…” and
so on. I need to create a first window for this splash and then, when
all the stuff is ready, i need to create another one for the application
/ game. Then I’ll kill the first window.
but… i looked at the documentation but i couldn’t see what to use.
Maybe the threads ?
Thanks in advance,
PH.
SDL does’nt support apps with multiple windows right now. Most people
just open up one window, and do all their loading stuff when it loads
up right in that main window.
PH-Neutre wrote:> hello,
I’d like to create a splash screen where I’ll put “loading datas…” and
so on. I need to create a first window for this splash and then, when
all the stuff is ready, i need to create another one for the application
/ game. Then I’ll kill the first window.but… i looked at the documentation but i couldn’t see what to use.
Maybe the threads ?Thanks in advance,
PH.
SDL does’nt support apps with multiple windows right now. Most people
ok
then, can I use SDL_SetVideoMode to resize the window without exiting
the program ?
Thanks,
PH.> just open up one window, and do all their loading stuff when it loads
up right in that main window.
SDL does’nt support apps with multiple windows right now. Most people
ok
then, can I use SDL_SetVideoMode to resize the window without exiting
the program ?
Yep. 
See ya!
-Sam Lantinga, Lead Programmer, Loki Entertainment Software
I don’t believe there’s any way of creating multiple windows under SDL
without using multiple programs. You’ll just have to wrap something
around the SDL functions. I have some classes written to handle
transitions between various scenes (menu, high score, actual game,
etc.) if you’re interested.> ----- Original Message -----
From: owner-sdl@lokigames.com [mailto:owner-sdl at lokigames.com]On Behalf
Of PH-Neutre
Sent: Tuesday, June 27, 2000 12:20 PM
To: sdl at lokigames.com
Subject: [SDL] New window / splash screenhello,
I’d like to create a splash screen where I’ll put “loading datas…” and
so on. I need to create a first window for this splash and then, when
all the stuff is ready, i need to create another one for the application
/ game. Then I’ll kill the first window.but… i looked at the documentation but i couldn’t see what to use.
Maybe the threads ?Thanks in advance,
PH.
I’ll just resize the window, because i don’t want to add lot of code to
the existing program.
Thanks a lot everybody !> I don’t believe there’s any way of creating multiple windows under SDL
without using multiple programs. You’ll just have to wrap something
around the SDL functions. I have some classes written to handle
transitions between various scenes (menu, high score, actual game,
etc.) if you’re interested.
Hey,
Glad you asked this question! I’ve been tinkering with SDL for a week or
two now and have been
trying to figure out an elegant way to create a splash screen with it. My
initial cut, which was one of the
responses to your post, was to create a program that first launched the
splash screen, then the main game loop.
This is a ugly hack though, and I’d hoped for a better way, i.e., to keep
it all within the same program executable.
This may in fact be possible still, as I’m not a strong (C) programmer 
My code is attached/included if interested (main.c).
Also, when I use the gtv_center_window function (Linux FAQ) to center my
splash window, the window starts out in the
bottom right corner of my screen for a split second, then jogs to the
center. Anyone have an idea why this is, and/or how
to correct this behaviour?
Further, I found that you need SDL1.1.3 or higher in order to use this
example (gtv_center_window) function. I had .9 installed, and my program
kept complaining about XMoveWindow being undefined, (even though it is
anXLib function), until I upgraded to 1.1.3 of SDL.
Anyway, thanks alot!
James Caple
PH-Neutre wrote:
hello,
I’d like to create a splash screen where I’ll put “loading datas…” and
so on. I need to create a first window for this splash and then, when
all the stuff is ready, i need to create another one for the application
/ game. Then I’ll kill the first window.but… i looked at the documentation but i couldn’t see what to use.
Maybe the threads ?Thanks in advance,
PH.
-------------- next part --------------
/*
#include <SDL.h>
#include <SDL_timer.h>
#include “SDL_syswm.h”
//Sint32 X, Y;
Uint32 pixel;
Uint8 *bits, bpp;
center_window(SDL_Surface *screen)
{
SDL_SysWMinfo info;
SDL_VERSION(&info.version);
if (SDL_GetWMInfo(&info) > 0 ) {
int x, y;
int w, h;
#ifdef unix
if (info.subsystem == SDL_SYSWM_X11) {
info.info.x11.lock_func();
w = DisplayWidth(info.info.x11.display, DefaultScreen(info.info.x11.display));
h = DisplayHeight(info.info.x11.display, DefaultScreen(info.info.x11.display));
x = (w - screen->w)/2;
y = (h - screen->h)/2;
XMoveWindow(info.info.x11.display, info.info.x11.wmwindow, x, y);
info.info.x11.unlock_func();
}
#else#
#endif
}
}
/*
if (SDL_MUSTLOCK(screen)) {
if (SDL_LockSurface(screen)<0)
return;
}
bpp = screen->format->BytesPerPixel;
//X = screen->w/2;
//Y = screen->h/2;
bits = ((Uint8 )screen->pixels)+Yscreen->pitch+X*bpp;
switch(bpp) {
case 1:
*((Uint8 *)(bits)) = (Uint8)pixel;
break;
case 2:
*((Uint16 *)(bits)) = (Uint16)pixel;
break;
case 3: {
Uint8 r,g,b;
r = (pixel>>screen->format->Rshift)&0xFF;
g = (pixel>>screen->format->Gshift)&0xFF;
b = (pixel>>screen->format->Bshift)&0xFF;
*((bits)+screen->format->Rshift/8) = r;
*((bits)+screen->format->Gshift/8) = g;
*((bits)+screen->format->Bshift/8) = b;
}
break;
case 4:
*((Uint32 *)(bits)) = (Uint32)pixel;
break;
}
if (SDL_MUSTLOCK(screen)) {
SDL_UnlockSurface(screen);
}
SDL_UpdateRect(screen, X, Y, 1, 1);
}
int FilterEvents(const SDL_Event *event) {
static int boycott = 1;
if ( (event->type == SDL_QUIT) && boycott ) {
printf(“Quit event filtered out – try again.\n”);
boycott = 0;
return (0);
}
if ( event->type == SDL_MOUSEMOTION ) {
printf(“Mouse moved to (%d,%d)\n”, event->motion.x, event->motion.y);
return(0);
}
return(1);
}
void ComplainAndExit(void) {
fprintf(stderr, “Problem: %s\n”, SDL_GetError());
exit(1);
}
-------------- next part --------------
/*
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
main() {
pid_t pid, w;
int i, status;
if ( (pid = fork()) == 0 ) {
// Run splash for a few seconds
system("./splash.c");
}
while((w = wait(&status)) && w != -1) {}
if ( (pid - fork()) == 0) {
// When splash is done, run main game loop
system("./main_tmd");
}
while((w = wait(&status)) && w != -1) {}
exit(0);
}
-------------- next part --------------
/*
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include <SDL.h>
#include <SDL_timer.h>
#include “WMUtils.h”
int main(int argc, char *argv) {
SDL_PixelFormat fmt;
SDL_Surface *screen, *locked;
SDL_Surface *imagebmp, *image;
SDL_Rect dstrect;
int i;
Uint8 *buffer;
SDL_Event event;
Uint32 u_Pause = 4000;
/* Initialize vide */
if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
fprintf(stderr, “Couldn’t initialize SDL: %s\n”, SDL_GetError());
exit (1);
}
atexit(SDL_Quit);
/* Load BMP file */
imagebmp = SDL_LoadBMP(“back.bmp”);
if ( imagebmp == NULL ) {
ComplainAndExit();
}
SDL_EventState(SDL_KEYDOWN, SDL_IGNORE);
SDL_EventState(SDL_KEYUP, SDL_IGNORE);
SDL_SetEventFilter(FilterEvents);
//screen = SDL_SetVideoMode(500, 640, 8, SDL_SWSURFACE|SDL_FULLSCREEN);
screen = SDL_SetVideoMode(500, 640, 8, SDL_SWSURFACE);
// Try to center window. Use gtv_center_window function from SDL Linux examples
// Function is in WMUtils.h
center_window( screen );
if ( screen == NULL ) {
//fprintf(stderr, “Couldn’t set 640x480x8 video mode: %s\n”, SDL_GetError());
//exit (1);
ComplainAndExit();
}
//SDL_Delay(5000);
/* set video colormap */
if ( imagebmp->format->palette != NULL ) {
SDL_SetColors(screen, imagebmp->format->palette->colors, 0, imagebmp->format->palette->ncolors);
}
/* Convert the image to the video format (maps colors) */
image = SDL_DisplayFormat(imagebmp);
SDL_FreeSurface(imagebmp);
if ( image == NULL ) {
ComplainAndExit();
}
/* Draw bands of color on the raw surface */
if ( SDL_MUSTLOCK(screen) ) {
if ( SDL_LockSurface(screen) < 0)
ComplainAndExit();
}
buffer=(Uint8 ) screen->pixels;
for ( i=0; ih; i++) {
memset (buffer, (i255)/screen->h, screen->w*screen->format->BytesPerPixel);
buffer += screen->pitch;
}
if ( SDL_MUSTLOCK(screen) ) {
SDL_UnlockSurface(screen);
}
/* Blit the image to the center of the screen */
dstrect.x = (screen->w-image->w)/2;
dstrect.y = (screen->h-image->h)/2;
dstrect.w = image->w;
dstrect.h = image->h;
if ( SDL_BlitSurface(image, NULL, screen, &dstrect) < 0 ) {
SDL_FreeSurface(image);
ComplainAndExit();
}
SDL_FreeSurface(image);
/* Update the screen */
SDL_UpdateRects(screen, 1, &dstrect);
/* Event handling stuff /
/******
while ( SDL_WaitEvent(&event) >= 0 ) {
switch (event.type) {
case SDL_ACTIVEEVENT: {
if ( event.active.state & SDL_APPACTIVE ) {
if ( event.active.gain ) {
printf(“App activated\n”);
} else {
printf(“App iconified\n”);
}
}
}
break;
case SDL_MOUSEBUTTONDOWN: {
Uint8 *keys;
keys = SDL_GetKeyState(NULL);
if ( keys[SDLK_ESCAPE] == SDL_PRESSED ) {
printf("Bye bye...\n");
exit(0);
}
printf("Mouse button pressed\n");
}
break;
case SDL_QUIT: {
printf("Quit requested, quitting.\n");
exit(0);
}
break;
}
}
*********/
//run();
/* Wait a few seconds then kick-off main game frame(s) */
SDL_Delay( u_Pause );
//system(“./main_tmd”);
exit(0);
/* This should never happen */
printf(“SDL_WaitEvent error: %s\n”, SDL_GetError());
exit(1);
}
Also, when I use the gtv_center_window function (Linux FAQ) to center my
splash window, the window starts out in the
bottom right corner of my screen for a split second, then jogs to the
center. Anyone have an idea why this is, and/or how
to correct this behaviour?
wouldn’t this have something to do with your window manager’s placement
settings? i know that sawfish has some, errr, novel ways of deciding where
to place a window. perhaps this is the problem?
wouldn’t this have something to do with your window manager’s placement
settings? i know that sawfish has some, errr, novel ways of deciding where
to place a window. perhaps this is the problem?
Ugh, yes, what is up with that? (Sorry, off-topic. It’s been really
annoying me though since I ran Helix updater a few days ago.)
-bill!
wouldn’t this have something to do with your window manager’s placement
settings? i know that sawfish has some, errr, novel ways of deciding where
to place a window. perhaps this is the problem?Ugh, yes, what is up with that? (Sorry, off-topic. It’s been really
annoying me though since I ran Helix updater a few days ago.)
Speaking of this, is there something in SDL (that I’ve missed in my daily
study of the various SDL header files… printed out and being toted
around in my laptop case that allows the user to force the placement of
a window in your software (and is cross-platform)?
I know you can do it in Windows (or, at least, I’m assuming you can since
leetle error windows always pop up in the same places) and I’m pretty sure
you can do it in X11 (at least, Gimp leads me to believe that)… If there
isn’t this feature in SDL, would it be prudent to include it in future
versions? Perhaps in an addon library (ala SDL_mixer, SDL_image, etc)?On Tue, 27 Jun 2000, William Kendrick wrote:
–
Sam Hart http://www.physics.arizona.edu/~hart/
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