Mercurial > sdl-ios-xcode
view test/testsprite.c @ 937:1e6366bde299
Date: Tue, 27 Jul 2004 17:14:00 +0200
From: "Eckhard Stolberg"
Subject: Controller names in SDL for Windows
I'm working on an Atari 2600 emulator for different systems that uses
the SDL. Some time ago someone created an adaptor that lets you use
your old Atari controllers with your computer through the USB port.
Some of the Atari controllers require special handling by the emulator,
so it would be nice, if it would be possible to detect if any of the
controllers connected to the computer is this adaptor.
SDL would allow that with the SDL_JoystickName function, but unfortunately
it doesn't work properly on Windows. On Linux and MacOSX this function
returns the name of the controller, but on Windows you'll only get the
name of the joystick driver. Most joysticks nowadays use the generic
Microsoft driver, so they all return the same name.
In an old MSDN article
(http://msdn.microsoft.com/archive/default.asp?url=/archive/en-us/dnarinput/html/msdn_extdirect.asp)
Microsoft describes how to read out the OEM controller names from the registry.
I have implemented this for the SDL controller handler on Windows,
and now reading the joystick name works properly there too.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Sat, 21 Aug 2004 03:45:58 +0000 |
parents | b14fdadd8311 |
children | be9c9c8f6d53 |
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/* Simple program: Move N sprites around on the screen as fast as possible */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <ctype.h> #include <math.h> #include <time.h> #include "SDL.h" #define DEBUG_FLIP 1 #define NUM_SPRITES 100 #define MAX_SPEED 1 SDL_Surface *sprite; int numsprites; SDL_Rect *sprite_rects; SDL_Rect *positions; SDL_Rect *velocities; int sprites_visible; Uint16 sprite_w, sprite_h; int LoadSprite(SDL_Surface *screen, char *file) { SDL_Surface *temp; /* Load the sprite image */ sprite = SDL_LoadBMP(file); if ( sprite == NULL ) { fprintf(stderr, "Couldn't load %s: %s", file, SDL_GetError()); return(-1); } /* Set transparent pixel as the pixel at (0,0) */ if ( sprite->format->palette ) { SDL_SetColorKey(sprite, (SDL_SRCCOLORKEY|SDL_RLEACCEL), *(Uint8 *)sprite->pixels); } /* Convert sprite to video format */ temp = SDL_DisplayFormat(sprite); SDL_FreeSurface(sprite); if ( temp == NULL ) { fprintf(stderr, "Couldn't convert background: %s\n", SDL_GetError()); return(-1); } sprite = temp; /* We're ready to roll. :) */ return(0); } void MoveSprites(SDL_Surface *screen, Uint32 background) { int i, nupdates; SDL_Rect area, *position, *velocity; nupdates = 0; /* Erase all the sprites if necessary */ if ( sprites_visible ) { SDL_FillRect(screen, NULL, background); } /* Move the sprite, bounce at the wall, and draw */ for ( i=0; i<numsprites; ++i ) { position = &positions[i]; velocity = &velocities[i]; position->x += velocity->x; if ( (position->x < 0) || (position->x >= (screen->w - sprite_w)) ) { velocity->x = -velocity->x; position->x += velocity->x; } position->y += velocity->y; if ( (position->y < 0) || (position->y >= (screen->h - sprite_w)) ) { velocity->y = -velocity->y; position->y += velocity->y; } /* Blit the sprite onto the screen */ area = *position; SDL_BlitSurface(sprite, NULL, screen, &area); sprite_rects[nupdates++] = area; } #if DEBUG_FLIP { if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) { static int t = 0; Uint32 color = SDL_MapRGB (screen->format, 255, 0, 0); SDL_Rect r; r.x = (sin((float)t * 2 * 3.1459) + 1.0) / 2.0 * (screen->w-20); r.y = 0; r.w = 20; r.h = screen->h; SDL_FillRect (screen, &r, color); t+=2; } } #endif /* Update the screen! */ if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) { SDL_Flip(screen); } else { SDL_UpdateRects(screen, nupdates, sprite_rects); } sprites_visible = 1; } /* This is a way of telling whether or not to use hardware surfaces */ Uint32 FastestFlags(Uint32 flags, int width, int height, int bpp) { const SDL_VideoInfo *info; /* Hardware acceleration is only used in fullscreen mode */ flags |= SDL_FULLSCREEN; /* Check for various video capabilities */ info = SDL_GetVideoInfo(); if ( info->blit_hw_CC && info->blit_fill ) { /* We use accelerated colorkeying and color filling */ flags |= SDL_HWSURFACE; } /* If we have enough video memory, and will use accelerated blits directly to it, then use page flipping. */ if ( (flags & SDL_HWSURFACE) == SDL_HWSURFACE ) { /* Direct hardware blitting without double-buffering causes really bad flickering. */ if ( info->video_mem*1024 > (height*width*bpp/8) ) { flags |= SDL_DOUBLEBUF; } else { flags &= ~SDL_HWSURFACE; } } /* Return the flags */ return(flags); } int main(int argc, char *argv[]) { SDL_Surface *screen; Uint8 *mem; int width, height; Uint8 video_bpp; Uint32 videoflags; Uint32 background; int i, done; SDL_Event event; Uint32 then, now, frames; /* Initialize SDL */ if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) { fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError()); exit(1); } atexit(SDL_Quit); numsprites = NUM_SPRITES; videoflags = SDL_SWSURFACE|SDL_ANYFORMAT; width = 640; height = 480; video_bpp = 8; while ( argc > 1 ) { --argc; if ( strcmp(argv[argc-1], "-width") == 0 ) { width = atoi(argv[argc]); --argc; } else if ( strcmp(argv[argc-1], "-height") == 0 ) { height = atoi(argv[argc]); --argc; } else if ( strcmp(argv[argc-1], "-bpp") == 0 ) { video_bpp = atoi(argv[argc]); videoflags &= ~SDL_ANYFORMAT; --argc; } else if ( strcmp(argv[argc], "-fast") == 0 ) { videoflags = FastestFlags(videoflags, width, height, video_bpp); } else if ( strcmp(argv[argc], "-hw") == 0 ) { videoflags ^= SDL_HWSURFACE; } else if ( strcmp(argv[argc], "-flip") == 0 ) { videoflags ^= SDL_DOUBLEBUF; } else if ( strcmp(argv[argc], "-fullscreen") == 0 ) { videoflags ^= SDL_FULLSCREEN; } else if ( isdigit(argv[argc][0]) ) { numsprites = atoi(argv[argc]); } else { fprintf(stderr, "Usage: %s [-bpp N] [-hw] [-flip] [-fast] [-fullscreen] [numsprites]\n", argv[0]); exit(1); } } /* Set video mode */ screen = SDL_SetVideoMode(width, height, video_bpp, videoflags); if ( ! screen ) { fprintf(stderr, "Couldn't set %dx%d video mode: %s\n", width, height, SDL_GetError()); exit(2); } /* Load the sprite */ if ( LoadSprite(screen, "icon.bmp") < 0 ) { exit(1); } /* Allocate memory for the sprite info */ mem = (Uint8 *)malloc(4*sizeof(SDL_Rect)*numsprites); if ( mem == NULL ) { SDL_FreeSurface(sprite); fprintf(stderr, "Out of memory!\n"); exit(2); } sprite_rects = (SDL_Rect *)mem; positions = sprite_rects; sprite_rects += numsprites; velocities = sprite_rects; sprite_rects += numsprites; sprite_w = sprite->w; sprite_h = sprite->h; srand(time(NULL)); for ( i=0; i<numsprites; ++i ) { positions[i].x = rand()%(screen->w - sprite_w); positions[i].y = rand()%(screen->h - sprite_h); positions[i].w = sprite->w; positions[i].h = sprite->h; velocities[i].x = 0; velocities[i].y = 0; while ( ! velocities[i].x && ! velocities[i].y ) { velocities[i].x = (rand()%(MAX_SPEED*2+1))-MAX_SPEED; velocities[i].y = (rand()%(MAX_SPEED*2+1))-MAX_SPEED; } } background = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00); /* Print out information about our surfaces */ printf("Screen is at %d bits per pixel\n",screen->format->BitsPerPixel); if ( (screen->flags & SDL_HWSURFACE) == SDL_HWSURFACE ) { printf("Screen is in video memory\n"); } else { printf("Screen is in system memory\n"); } if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) { printf("Screen has double-buffering enabled\n"); } if ( (sprite->flags & SDL_HWSURFACE) == SDL_HWSURFACE ) { printf("Sprite is in video memory\n"); } else { printf("Sprite is in system memory\n"); } /* Run a sample blit to trigger blit acceleration */ { SDL_Rect dst; dst.x = 0; dst.y = 0; dst.w = sprite->w; dst.h = sprite->h; SDL_BlitSurface(sprite, NULL, screen, &dst); SDL_FillRect(screen, &dst, background); } if ( (sprite->flags & SDL_HWACCEL) == SDL_HWACCEL ) { printf("Sprite blit uses hardware acceleration\n"); } if ( (sprite->flags & SDL_RLEACCEL) == SDL_RLEACCEL ) { printf("Sprite blit uses RLE acceleration\n"); } /* Loop, blitting sprites and waiting for a keystroke */ frames = 0; then = SDL_GetTicks(); done = 0; sprites_visible = 0; while ( !done ) { /* Check for events */ ++frames; while ( SDL_PollEvent(&event) ) { switch (event.type) { case SDL_MOUSEBUTTONDOWN: SDL_WarpMouse(screen->w/2, screen->h/2); break; case SDL_KEYDOWN: /* Any keypress quits the app... */ case SDL_QUIT: done = 1; break; default: break; } } MoveSprites(screen, background); } SDL_FreeSurface(sprite); free(mem); /* Print out some timing information */ now = SDL_GetTicks(); if ( now > then ) { printf("%2.2f frames per second\n", ((double)frames*1000)/(now-then)); } SDL_Quit(); return(0); }