annotate test/testsprite.c @ 1022:3d4f1930ed02

*** empty log message ***
author Sam Lantinga <slouken@libsdl.org>
date Tue, 04 Jan 2005 19:04:14 +0000
parents b14fdadd8311
children be9c9c8f6d53
rev   line source
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1 /* Simple program: Move N sprites around on the screen as fast as possible */
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2
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3 #include <stdio.h>
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4 #include <stdlib.h>
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5 #include <string.h>
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6 #include <ctype.h>
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7 #include <math.h>
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8 #include <time.h>
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9
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10 #include "SDL.h"
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11
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12 #define DEBUG_FLIP 1
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13
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14 #define NUM_SPRITES 100
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15 #define MAX_SPEED 1
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16
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17 SDL_Surface *sprite;
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18 int numsprites;
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19 SDL_Rect *sprite_rects;
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20 SDL_Rect *positions;
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21 SDL_Rect *velocities;
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22 int sprites_visible;
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23 Uint16 sprite_w, sprite_h;
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24
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25 int LoadSprite(SDL_Surface *screen, char *file)
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26 {
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27 SDL_Surface *temp;
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28
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29 /* Load the sprite image */
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30 sprite = SDL_LoadBMP(file);
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31 if ( sprite == NULL ) {
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32 fprintf(stderr, "Couldn't load %s: %s", file, SDL_GetError());
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33 return(-1);
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34 }
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35
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36 /* Set transparent pixel as the pixel at (0,0) */
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37 if ( sprite->format->palette ) {
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38 SDL_SetColorKey(sprite, (SDL_SRCCOLORKEY|SDL_RLEACCEL),
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39 *(Uint8 *)sprite->pixels);
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40 }
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41
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42 /* Convert sprite to video format */
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43 temp = SDL_DisplayFormat(sprite);
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44 SDL_FreeSurface(sprite);
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45 if ( temp == NULL ) {
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46 fprintf(stderr, "Couldn't convert background: %s\n",
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47 SDL_GetError());
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48 return(-1);
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49 }
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50 sprite = temp;
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51
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52 /* We're ready to roll. :) */
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53 return(0);
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54 }
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55
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56 void MoveSprites(SDL_Surface *screen, Uint32 background)
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57 {
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58 int i, nupdates;
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59 SDL_Rect area, *position, *velocity;
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60
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61 nupdates = 0;
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62 /* Erase all the sprites if necessary */
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63 if ( sprites_visible ) {
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64 SDL_FillRect(screen, NULL, background);
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65 }
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66
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67 /* Move the sprite, bounce at the wall, and draw */
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68 for ( i=0; i<numsprites; ++i ) {
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69 position = &positions[i];
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70 velocity = &velocities[i];
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71 position->x += velocity->x;
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72 if ( (position->x < 0) || (position->x >= (screen->w - sprite_w)) ) {
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73 velocity->x = -velocity->x;
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74 position->x += velocity->x;
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75 }
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76 position->y += velocity->y;
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77 if ( (position->y < 0) || (position->y >= (screen->h - sprite_w)) ) {
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78 velocity->y = -velocity->y;
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79 position->y += velocity->y;
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80 }
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81
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82 /* Blit the sprite onto the screen */
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83 area = *position;
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84 SDL_BlitSurface(sprite, NULL, screen, &area);
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85 sprite_rects[nupdates++] = area;
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86 }
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87
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88 #if DEBUG_FLIP
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89 {
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90 if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) {
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91 static int t = 0;
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92
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93 Uint32 color = SDL_MapRGB (screen->format, 255, 0, 0);
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94 SDL_Rect r;
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95 r.x = (sin((float)t * 2 * 3.1459) + 1.0) / 2.0 * (screen->w-20);
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96 r.y = 0;
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97 r.w = 20;
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98 r.h = screen->h;
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99
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100 SDL_FillRect (screen, &r, color);
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101 t+=2;
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102 }
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103 }
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104 #endif
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105
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106 /* Update the screen! */
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107 if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) {
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108 SDL_Flip(screen);
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109 } else {
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110 SDL_UpdateRects(screen, nupdates, sprite_rects);
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111 }
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112 sprites_visible = 1;
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113 }
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114
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115 /* This is a way of telling whether or not to use hardware surfaces */
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116 Uint32 FastestFlags(Uint32 flags, int width, int height, int bpp)
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117 {
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118 const SDL_VideoInfo *info;
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119
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120 /* Hardware acceleration is only used in fullscreen mode */
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121 flags |= SDL_FULLSCREEN;
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122
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123 /* Check for various video capabilities */
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124 info = SDL_GetVideoInfo();
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125 if ( info->blit_hw_CC && info->blit_fill ) {
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126 /* We use accelerated colorkeying and color filling */
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127 flags |= SDL_HWSURFACE;
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128 }
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129 /* If we have enough video memory, and will use accelerated
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130 blits directly to it, then use page flipping.
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131 */
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132 if ( (flags & SDL_HWSURFACE) == SDL_HWSURFACE ) {
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133 /* Direct hardware blitting without double-buffering
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134 causes really bad flickering.
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135 */
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136 if ( info->video_mem*1024 > (height*width*bpp/8) ) {
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137 flags |= SDL_DOUBLEBUF;
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138 } else {
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139 flags &= ~SDL_HWSURFACE;
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140 }
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141 }
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142
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143 /* Return the flags */
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144 return(flags);
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145 }
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146
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147 int main(int argc, char *argv[])
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148 {
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149 SDL_Surface *screen;
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150 Uint8 *mem;
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151 int width, height;
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152 Uint8 video_bpp;
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153 Uint32 videoflags;
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154 Uint32 background;
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155 int i, done;
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156 SDL_Event event;
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157 Uint32 then, now, frames;
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158
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159 /* Initialize SDL */
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160 if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
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161 fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError());
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162 exit(1);
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163 }
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diff changeset
164 atexit(SDL_Quit);
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165
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166 numsprites = NUM_SPRITES;
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diff changeset
167 videoflags = SDL_SWSURFACE|SDL_ANYFORMAT;
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diff changeset
168 width = 640;
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169 height = 480;
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diff changeset
170 video_bpp = 8;
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parents:
diff changeset
171 while ( argc > 1 ) {
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parents:
diff changeset
172 --argc;
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parents:
diff changeset
173 if ( strcmp(argv[argc-1], "-width") == 0 ) {
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parents:
diff changeset
174 width = atoi(argv[argc]);
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parents:
diff changeset
175 --argc;
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parents:
diff changeset
176 } else
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parents:
diff changeset
177 if ( strcmp(argv[argc-1], "-height") == 0 ) {
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parents:
diff changeset
178 height = atoi(argv[argc]);
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parents:
diff changeset
179 --argc;
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parents:
diff changeset
180 } else
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parents:
diff changeset
181 if ( strcmp(argv[argc-1], "-bpp") == 0 ) {
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diff changeset
182 video_bpp = atoi(argv[argc]);
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parents:
diff changeset
183 videoflags &= ~SDL_ANYFORMAT;
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parents:
diff changeset
184 --argc;
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parents:
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185 } else
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parents:
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186 if ( strcmp(argv[argc], "-fast") == 0 ) {
107
01fcac5d146e Fixed crash in testsprite when using the -fast option (nobody caught this?)
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
187 videoflags = FastestFlags(videoflags, width, height, video_bpp);
0
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188 } else
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189 if ( strcmp(argv[argc], "-hw") == 0 ) {
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diff changeset
190 videoflags ^= SDL_HWSURFACE;
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parents:
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191 } else
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192 if ( strcmp(argv[argc], "-flip") == 0 ) {
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193 videoflags ^= SDL_DOUBLEBUF;
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parents:
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194 } else
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195 if ( strcmp(argv[argc], "-fullscreen") == 0 ) {
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196 videoflags ^= SDL_FULLSCREEN;
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197 } else
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198 if ( isdigit(argv[argc][0]) ) {
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199 numsprites = atoi(argv[argc]);
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parents:
diff changeset
200 } else {
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diff changeset
201 fprintf(stderr,
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202 "Usage: %s [-bpp N] [-hw] [-flip] [-fast] [-fullscreen] [numsprites]\n",
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parents:
diff changeset
203 argv[0]);
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diff changeset
204 exit(1);
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parents:
diff changeset
205 }
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parents:
diff changeset
206 }
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parents:
diff changeset
207
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parents:
diff changeset
208 /* Set video mode */
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diff changeset
209 screen = SDL_SetVideoMode(width, height, video_bpp, videoflags);
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parents:
diff changeset
210 if ( ! screen ) {
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parents:
diff changeset
211 fprintf(stderr, "Couldn't set %dx%d video mode: %s\n",
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diff changeset
212 width, height, SDL_GetError());
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parents:
diff changeset
213 exit(2);
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parents:
diff changeset
214 }
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parents:
diff changeset
215
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parents:
diff changeset
216 /* Load the sprite */
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parents:
diff changeset
217 if ( LoadSprite(screen, "icon.bmp") < 0 ) {
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parents:
diff changeset
218 exit(1);
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parents:
diff changeset
219 }
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parents:
diff changeset
220
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parents:
diff changeset
221 /* Allocate memory for the sprite info */
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parents:
diff changeset
222 mem = (Uint8 *)malloc(4*sizeof(SDL_Rect)*numsprites);
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parents:
diff changeset
223 if ( mem == NULL ) {
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parents:
diff changeset
224 SDL_FreeSurface(sprite);
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parents:
diff changeset
225 fprintf(stderr, "Out of memory!\n");
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parents:
diff changeset
226 exit(2);
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parents:
diff changeset
227 }
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diff changeset
228 sprite_rects = (SDL_Rect *)mem;
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parents:
diff changeset
229 positions = sprite_rects;
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parents:
diff changeset
230 sprite_rects += numsprites;
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parents:
diff changeset
231 velocities = sprite_rects;
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parents:
diff changeset
232 sprite_rects += numsprites;
288
2f5a6062db86 Updated for Watcom C++ and LCC compilers
Sam Lantinga <slouken@libsdl.org>
parents: 107
diff changeset
233 sprite_w = sprite->w;
2f5a6062db86 Updated for Watcom C++ and LCC compilers
Sam Lantinga <slouken@libsdl.org>
parents: 107
diff changeset
234 sprite_h = sprite->h;
0
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parents:
diff changeset
235 srand(time(NULL));
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parents:
diff changeset
236 for ( i=0; i<numsprites; ++i ) {
288
2f5a6062db86 Updated for Watcom C++ and LCC compilers
Sam Lantinga <slouken@libsdl.org>
parents: 107
diff changeset
237 positions[i].x = rand()%(screen->w - sprite_w);
2f5a6062db86 Updated for Watcom C++ and LCC compilers
Sam Lantinga <slouken@libsdl.org>
parents: 107
diff changeset
238 positions[i].y = rand()%(screen->h - sprite_h);
0
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parents:
diff changeset
239 positions[i].w = sprite->w;
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parents:
diff changeset
240 positions[i].h = sprite->h;
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parents:
diff changeset
241 velocities[i].x = 0;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
242 velocities[i].y = 0;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
243 while ( ! velocities[i].x && ! velocities[i].y ) {
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parents:
diff changeset
244 velocities[i].x = (rand()%(MAX_SPEED*2+1))-MAX_SPEED;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
245 velocities[i].y = (rand()%(MAX_SPEED*2+1))-MAX_SPEED;
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parents:
diff changeset
246 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
247 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
248 background = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
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parents:
diff changeset
249
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parents:
diff changeset
250 /* Print out information about our surfaces */
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parents:
diff changeset
251 printf("Screen is at %d bits per pixel\n",screen->format->BitsPerPixel);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
252 if ( (screen->flags & SDL_HWSURFACE) == SDL_HWSURFACE ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
253 printf("Screen is in video memory\n");
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
254 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
255 printf("Screen is in system memory\n");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
256 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
257 if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
258 printf("Screen has double-buffering enabled\n");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
259 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
260 if ( (sprite->flags & SDL_HWSURFACE) == SDL_HWSURFACE ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
261 printf("Sprite is in video memory\n");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
262 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
263 printf("Sprite is in system memory\n");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
264 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
265 /* Run a sample blit to trigger blit acceleration */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
266 { SDL_Rect dst;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
267 dst.x = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
268 dst.y = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
269 dst.w = sprite->w;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
270 dst.h = sprite->h;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
271 SDL_BlitSurface(sprite, NULL, screen, &dst);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
272 SDL_FillRect(screen, &dst, background);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
273 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
274 if ( (sprite->flags & SDL_HWACCEL) == SDL_HWACCEL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
275 printf("Sprite blit uses hardware acceleration\n");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
276 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
277 if ( (sprite->flags & SDL_RLEACCEL) == SDL_RLEACCEL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
278 printf("Sprite blit uses RLE acceleration\n");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
279 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
280
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
281 /* Loop, blitting sprites and waiting for a keystroke */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
282 frames = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
283 then = SDL_GetTicks();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
284 done = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
285 sprites_visible = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
286 while ( !done ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
287 /* Check for events */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
288 ++frames;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
289 while ( SDL_PollEvent(&event) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
290 switch (event.type) {
529
21409a7a5fee *** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents: 288
diff changeset
291 case SDL_MOUSEBUTTONDOWN:
21409a7a5fee *** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents: 288
diff changeset
292 SDL_WarpMouse(screen->w/2, screen->h/2);
21409a7a5fee *** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents: 288
diff changeset
293 break;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
294 case SDL_KEYDOWN:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
295 /* Any keypress quits the app... */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
296 case SDL_QUIT:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
297 done = 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
298 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
299 default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
300 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
301 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
302 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
303 MoveSprites(screen, background);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
304 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
305 SDL_FreeSurface(sprite);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
306 free(mem);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
307
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
308 /* Print out some timing information */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
309 now = SDL_GetTicks();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
310 if ( now > then ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
311 printf("%2.2f frames per second\n",
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
312 ((double)frames*1000)/(now-then));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
313 }
288
2f5a6062db86 Updated for Watcom C++ and LCC compilers
Sam Lantinga <slouken@libsdl.org>
parents: 107
diff changeset
314 SDL_Quit();
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
315 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
316 }