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annotate test/testfill.c @ 5097:dceec93471e7

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Improvements based on feedback from Anthony Williams
author Sam Lantinga <slouken@libsdl.org>
date Tue, 25 Jan 2011 17:40:06 -0800
parents 5ea08f1c29d0
children
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5ea08f1c29d0 Added testfill to test raw fill performance
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1 /* Simple program: Fill the screen with colors as fast as possible */
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2
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3 #include <stdlib.h>
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4 #include <stdio.h>
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5 #include <string.h>
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6 #include <time.h>
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7
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8 #include "SDL.h"
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9
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10 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
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11 static void
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12 quit(int rc)
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13 {
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14 SDL_Quit();
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15 exit(rc);
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16 }
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17
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18 int
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19 main(int argc, char *argv[])
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20 {
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21 SDL_Surface *screen;
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22 int width, height;
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23 Uint8 video_bpp;
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24 Uint32 videoflags;
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25 Uint32 colors[3];
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26 int i, done;
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27 SDL_Event event;
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28 Uint32 then, now, frames;
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29
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30 /* Initialize SDL */
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31 if (SDL_Init(SDL_INIT_VIDEO) < 0) {
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32 fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
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33 return (1);
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34 }
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35
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36 width = 640;
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37 height = 480;
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38 video_bpp = 8;
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39 videoflags = 0;
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40 while (argc > 1) {
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41 --argc;
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42 if (strcmp(argv[argc - 1], "-width") == 0) {
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43 width = atoi(argv[argc]);
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44 --argc;
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45 } else if (strcmp(argv[argc - 1], "-height") == 0) {
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46 height = atoi(argv[argc]);
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47 --argc;
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48 } else if (strcmp(argv[argc - 1], "-bpp") == 0) {
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49 video_bpp = atoi(argv[argc]);
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50 --argc;
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51 } else if (strcmp(argv[argc], "-fullscreen") == 0) {
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52 videoflags ^= SDL_FULLSCREEN;
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53 } else {
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54 fprintf(stderr,
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55 "Usage: %s [-width N] [-height N] [-bpp N] [-fullscreen]\n",
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56 argv[0]);
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57 quit(1);
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58 }
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59 }
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60
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61 /* Set video mode */
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62 screen = SDL_SetVideoMode(width, height, video_bpp, 0);
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63 if (!screen) {
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64 fprintf(stderr, "Couldn't set %dx%d video mode: %s\n",
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65 width, height, SDL_GetError());
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66 quit(2);
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67 }
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68
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69 /* Get the colors */
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70 colors[0] = SDL_MapRGB(screen->format, 0xFF, 0x00, 0x00);
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71 colors[1] = SDL_MapRGB(screen->format, 0x00, 0xFF, 0x00);
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72 colors[2] = SDL_MapRGB(screen->format, 0x00, 0x00, 0xFF);
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73
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74 /* Loop, filling and waiting for a keystroke */
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75 frames = 0;
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76 then = SDL_GetTicks();
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77 done = 0;
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78 while (!done) {
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79 /* Check for events */
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80 ++frames;
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81 while (SDL_PollEvent(&event)) {
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82 switch (event.type) {
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83 case SDL_MOUSEBUTTONDOWN:
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84 SDL_WarpMouse(screen->w / 2, screen->h / 2);
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85 break;
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86 case SDL_KEYDOWN:
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87 /* Any keypress quits the app... */
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88 case SDL_QUIT:
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89 done = 1;
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90 break;
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91 default:
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92 break;
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93 }
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94 }
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95 SDL_FillRect(screen, NULL, colors[frames%3]);
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96 SDL_Flip(screen);
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97 }
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98
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99 /* Print out some timing information */
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100 now = SDL_GetTicks();
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101 if (now > then) {
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102 double fps = ((double) frames * 1000) / (now - then);
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103 printf("%2.2f frames per second\n", fps);
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104 }
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105 SDL_Quit();
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106 return (0);
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107 }