test/testsprite.c
author Edgar Simo <bobbens@gmail.com>
Wed, 06 Aug 2008 07:54:33 +0000
branchgsoc2008_force_feedback
changeset 2614 3ee319d9800a
parent 1931 103c6fec2a60
child 2784 9bbe3bd94be8
permissions -rw-r--r--
Fixed another typo.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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/* Simple program:  Move N sprites around on the screen as fast as possible */
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#include <stdlib.h>
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#include <stdio.h>
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#include <time.h>
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#include <math.h>
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#include "SDL.h"
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#define NUM_SPRITES	100
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#define MAX_SPEED 	1
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SDL_Surface *sprite;
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int numsprites;
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SDL_Rect *sprite_rects;
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SDL_Rect *positions;
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SDL_Rect *velocities;
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int sprites_visible;
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int debug_flip;
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Uint16 sprite_w, sprite_h;
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/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
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static void
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quit(int rc)
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{
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    SDL_Quit();
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    exit(rc);
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}
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int
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LoadSprite(char *file)
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{
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    SDL_Surface *temp;
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    /* Load the sprite image */
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    sprite = SDL_LoadBMP(file);
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    if (sprite == NULL) {
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        fprintf(stderr, "Couldn't load %s: %s", file, SDL_GetError());
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        return (-1);
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    }
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    /* Set transparent pixel as the pixel at (0,0) */
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    if (sprite->format->palette) {
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        SDL_SetColorKey(sprite, (SDL_SRCCOLORKEY | SDL_RLEACCEL),
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                        *(Uint8 *) sprite->pixels);
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    }
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    /* Convert sprite to video format */
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    temp = SDL_DisplayFormat(sprite);
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    SDL_FreeSurface(sprite);
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    if (temp == NULL) {
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        fprintf(stderr, "Couldn't convert background: %s\n", SDL_GetError());
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        return (-1);
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    }
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    sprite = temp;
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    /* We're ready to roll. :) */
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    return (0);
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}
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void
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MoveSprites(SDL_Surface * screen, Uint32 background)
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{
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    int i, nupdates;
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    SDL_Rect area, *position, *velocity;
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    nupdates = 0;
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    /* Erase all the sprites if necessary */
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    if (sprites_visible) {
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        SDL_FillRect(screen, NULL, background);
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    }
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    /* Move the sprite, bounce at the wall, and draw */
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    for (i = 0; i < numsprites; ++i) {
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        position = &positions[i];
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        velocity = &velocities[i];
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        position->x += velocity->x;
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        if ((position->x < 0) || (position->x >= (screen->w - sprite_w))) {
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            velocity->x = -velocity->x;
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            position->x += velocity->x;
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        }
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        position->y += velocity->y;
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        if ((position->y < 0) || (position->y >= (screen->h - sprite_w))) {
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            velocity->y = -velocity->y;
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            position->y += velocity->y;
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        }
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        /* Blit the sprite onto the screen */
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        area = *position;
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        SDL_BlitSurface(sprite, NULL, screen, &area);
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        sprite_rects[nupdates++] = area;
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    }
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    if (debug_flip) {
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        if ((screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF) {
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            static int t = 0;
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            Uint32 color = SDL_MapRGB(screen->format, 255, 0, 0);
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            SDL_Rect r;
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            r.x =
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                (sin((float) t * 2 * 3.1459) + 1.0) / 2.0 * (screen->w - 20);
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            r.y = 0;
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            r.w = 20;
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            r.h = screen->h;
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            SDL_FillRect(screen, &r, color);
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            t += 2;
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        }
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    }
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    /* Update the screen! */
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    if ((screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF) {
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        SDL_Flip(screen);
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    } else {
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        SDL_UpdateRects(screen, nupdates, sprite_rects);
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    }
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    sprites_visible = 1;
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}
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/* This is a way of telling whether or not to use hardware surfaces */
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Uint32
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FastestFlags(Uint32 flags, int width, int height, int bpp)
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{
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    const SDL_VideoInfo *info;
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    /* Hardware acceleration is only used in fullscreen mode */
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    flags |= SDL_FULLSCREEN;
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    /* Check for various video capabilities */
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    info = SDL_GetVideoInfo();
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    if (info->blit_hw_CC && info->blit_fill) {
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        /* We use accelerated colorkeying and color filling */
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        flags |= SDL_HWSURFACE;
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    }
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    /* If we have enough video memory, and will use accelerated
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       blits directly to it, then use page flipping.
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     */
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   138
    if ((flags & SDL_HWSURFACE) == SDL_HWSURFACE) {
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        /* Direct hardware blitting without double-buffering
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           causes really bad flickering.
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         */
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        if (info->video_mem * 1024 > (height * width * bpp / 8)) {
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            flags |= SDL_DOUBLEBUF;
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   144
        } else {
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            flags &= ~SDL_HWSURFACE;
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   146
        }
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    }
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    /* Return the flags */
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    return (flags);
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}
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int
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main(int argc, char *argv[])
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{
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    SDL_Surface *screen;
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    Uint8 *mem;
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    int width, height;
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   159
    Uint8 video_bpp;
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    Uint32 videoflags;
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    Uint32 background;
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    int i, done;
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    SDL_Event event;
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    Uint32 then, now, frames;
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    /* Initialize SDL */
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   167
    if (SDL_Init(SDL_INIT_VIDEO) < 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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        fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
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        return (1);
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    }
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    numsprites = NUM_SPRITES;
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    videoflags = SDL_SWSURFACE | SDL_ANYFORMAT;
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    width = 640;
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    height = 480;
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    video_bpp = 8;
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    debug_flip = 0;
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    while (argc > 1) {
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        --argc;
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        if (strcmp(argv[argc - 1], "-width") == 0) {
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            width = atoi(argv[argc]);
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            --argc;
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        } else if (strcmp(argv[argc - 1], "-height") == 0) {
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            height = atoi(argv[argc]);
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            --argc;
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   186
        } else if (strcmp(argv[argc - 1], "-bpp") == 0) {
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            video_bpp = atoi(argv[argc]);
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            videoflags &= ~SDL_ANYFORMAT;
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   189
            --argc;
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   190
        } else if (strcmp(argv[argc], "-fast") == 0) {
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            videoflags = FastestFlags(videoflags, width, height, video_bpp);
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   192
        } else if (strcmp(argv[argc], "-hw") == 0) {
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            videoflags ^= SDL_HWSURFACE;
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   194
        } else if (strcmp(argv[argc], "-flip") == 0) {
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   195
            videoflags ^= SDL_DOUBLEBUF;
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   196
        } else if (strcmp(argv[argc], "-debugflip") == 0) {
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   197
            debug_flip ^= 1;
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   198
        } else if (strcmp(argv[argc], "-fullscreen") == 0) {
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   199
            videoflags ^= SDL_FULLSCREEN;
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   200
        } else if (isdigit(argv[argc][0])) {
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   201
            numsprites = atoi(argv[argc]);
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   202
        } else {
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            fprintf(stderr,
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                    "Usage: %s [-bpp N] [-hw] [-flip] [-fast] [-fullscreen] [numsprites]\n",
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                    argv[0]);
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            quit(1);
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   207
        }
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   208
    }
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    /* Set video mode */
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   211
    screen = SDL_SetVideoMode(width, height, video_bpp, videoflags);
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   212
    if (!screen) {
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   213
        fprintf(stderr, "Couldn't set %dx%d video mode: %s\n",
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   214
                width, height, SDL_GetError());
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   215
        quit(2);
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   216
    }
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   217
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   218
    /* Load the sprite */
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   219
    if (LoadSprite("icon.bmp") < 0) {
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   220
        quit(1);
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   221
    }
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   222
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   223
    /* Allocate memory for the sprite info */
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   224
    mem = (Uint8 *) malloc(4 * sizeof(SDL_Rect) * numsprites);
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   225
    if (mem == NULL) {
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   226
        SDL_FreeSurface(sprite);
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   227
        fprintf(stderr, "Out of memory!\n");
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   228
        quit(2);
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   229
    }
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   230
    sprite_rects = (SDL_Rect *) mem;
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   231
    positions = sprite_rects;
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   232
    sprite_rects += numsprites;
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   233
    velocities = sprite_rects;
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   234
    sprite_rects += numsprites;
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   235
    sprite_w = sprite->w;
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   236
    sprite_h = sprite->h;
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   237
    srand(time(NULL));
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   238
    for (i = 0; i < numsprites; ++i) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   239
        positions[i].x = rand() % (screen->w - sprite_w);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   240
        positions[i].y = rand() % (screen->h - sprite_h);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   241
        positions[i].w = sprite->w;
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   242
        positions[i].h = sprite->h;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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        velocities[i].x = 0;
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   244
        velocities[i].y = 0;
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   245
        while (!velocities[i].x && !velocities[i].y) {
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   246
            velocities[i].x = (rand() % (MAX_SPEED * 2 + 1)) - MAX_SPEED;
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            velocities[i].y = (rand() % (MAX_SPEED * 2 + 1)) - MAX_SPEED;
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   248
        }
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   249
    }
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    background = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
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    /* Print out information about our surfaces */
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    printf("Screen is at %d bits per pixel\n", screen->format->BitsPerPixel);
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    if ((screen->flags & SDL_HWSURFACE) == SDL_HWSURFACE) {
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        printf("Screen is in video memory\n");
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   256
    } else {
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        printf("Screen is in system memory\n");
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   258
    }
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    if ((screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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        printf("Screen has double-buffering enabled\n");
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   261
    }
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    if ((sprite->flags & SDL_HWSURFACE) == SDL_HWSURFACE) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   263
        printf("Sprite is in video memory\n");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   264
    } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   265
        printf("Sprite is in system memory\n");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   266
    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   267
    /* Run a sample blit to trigger blit acceleration */
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   268
    {
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   269
        SDL_Rect dst;
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        dst.x = 0;
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   271
        dst.y = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   272
        dst.w = sprite->w;
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   273
        dst.h = sprite->h;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   274
        SDL_BlitSurface(sprite, NULL, screen, &dst);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   275
        SDL_FillRect(screen, &dst, background);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   276
    }
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   277
    if ((sprite->flags & SDL_HWACCEL) == SDL_HWACCEL) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   278
        printf("Sprite blit uses hardware acceleration\n");
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   279
    }
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   280
    if ((sprite->flags & SDL_RLEACCEL) == SDL_RLEACCEL) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   281
        printf("Sprite blit uses RLE acceleration\n");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   282
    }
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   283
1895
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   284
    /* Loop, blitting sprites and waiting for a keystroke */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   285
    frames = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   286
    then = SDL_GetTicks();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   287
    done = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   288
    sprites_visible = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   289
    while (!done) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   290
        /* Check for events */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   291
        ++frames;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   292
        while (SDL_PollEvent(&event)) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   293
            switch (event.type) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   294
            case SDL_MOUSEBUTTONDOWN:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   295
                SDL_WarpMouse(screen->w / 2, screen->h / 2);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   296
                break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   297
            case SDL_KEYDOWN:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   298
                /* Any keypress quits the app... */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   299
            case SDL_QUIT:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   300
                done = 1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   301
                break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   302
            default:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   303
                break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   304
            }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   305
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   306
        MoveSprites(screen, background);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   307
    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   308
    SDL_FreeSurface(sprite);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   309
    free(mem);
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   310
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   311
    /* Print out some timing information */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   312
    now = SDL_GetTicks();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   313
    if (now > then) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   314
        printf("%2.2f frames per second\n",
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   315
               ((double) frames * 1000) / (now - then));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   316
    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   317
    SDL_Quit();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   318
    return (0);
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   319
}