Mercurial > sdl-ios-xcode
view test/threadwin.c @ 118:7c47e511459d
Fix noise when starting audio under DX5 (thanks Jesse!)
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sun, 22 Jul 2001 21:25:22 +0000 |
parents | 74212992fb08 |
children | cb40b26523a5 |
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/* 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); }