119 lines
3.2 KiB
C
119 lines
3.2 KiB
C
/*
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Copyright (C) 1997-2011 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely.
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*/
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/* Simple program: Fill the screen with colors as fast as possible */
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <time.h>
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#include "SDL.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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main(int argc, char *argv[])
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{
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SDL_Surface *screen;
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int width, height;
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Uint8 video_bpp;
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Uint32 videoflags;
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Uint32 colors[3];
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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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if (SDL_Init(SDL_INIT_VIDEO) < 0) {
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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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width = 640;
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height = 480;
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video_bpp = 8;
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videoflags = 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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} else if (strcmp(argv[argc - 1], "-bpp") == 0) {
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video_bpp = atoi(argv[argc]);
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--argc;
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} else if (strcmp(argv[argc], "-fullscreen") == 0) {
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videoflags ^= SDL_FULLSCREEN;
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} else {
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fprintf(stderr,
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"Usage: %s [-width N] [-height N] [-bpp N] [-fullscreen]\n",
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argv[0]);
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quit(1);
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}
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}
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/* Set video mode */
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screen = SDL_SetVideoMode(width, height, video_bpp, 0);
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if (!screen) {
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fprintf(stderr, "Couldn't set %dx%d video mode: %s\n",
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width, height, SDL_GetError());
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quit(2);
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}
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/* Get the colors */
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colors[0] = SDL_MapRGB(screen->format, 0xFF, 0x00, 0x00);
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colors[1] = SDL_MapRGB(screen->format, 0x00, 0xFF, 0x00);
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colors[2] = SDL_MapRGB(screen->format, 0x00, 0x00, 0xFF);
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/* Loop, filling and waiting for a keystroke */
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frames = 0;
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then = SDL_GetTicks();
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done = 0;
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while (!done) {
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/* Check for events */
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++frames;
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while (SDL_PollEvent(&event)) {
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switch (event.type) {
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case SDL_MOUSEBUTTONDOWN:
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SDL_WarpMouse(screen->w / 2, screen->h / 2);
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break;
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case SDL_KEYDOWN:
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/* Any keypress quits the app... */
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case SDL_QUIT:
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done = 1;
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break;
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default:
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break;
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}
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}
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SDL_FillRect(screen, NULL, colors[frames%3]);
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SDL_Flip(screen);
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}
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/* Print out some timing information */
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now = SDL_GetTicks();
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if (now > then) {
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double fps = ((double) frames * 1000) / (now - then);
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printf("%2.2f frames per second\n", fps);
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}
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SDL_Quit();
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return (0);
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}
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