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annotate test/graywin.c @ 545:8406511f850e
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| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 17 Nov 2002 19:30:44 +0000 |
| parents | d3abe873e3f7 |
| children | 609543e2b3a1 |
| rev | line source |
|---|---|
| 0 | 1 |
| 2 /* Simple program: Fill a colormap with gray and stripe it down the screen */ | |
| 3 | |
| 4 #include <stdio.h> | |
| 5 #include <stdlib.h> | |
| 6 #include <string.h> | |
| 7 #include <time.h> | |
| 8 | |
| 9 #include "SDL.h" | |
| 10 | |
| 11 #ifdef TEST_VGA16 /* Define this if you want to test VGA 16-color video modes */ | |
| 12 #define NUM_COLORS 16 | |
| 13 #else | |
| 14 #define NUM_COLORS 256 | |
| 15 #endif | |
| 16 | |
| 17 /* Draw a randomly sized and colored box centered about (X,Y) */ | |
|
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18 void DrawBox(SDL_Surface *screen, int X, int Y, int width, int height) |
| 0 | 19 { |
| 20 static unsigned int seeded = 0; | |
| 21 SDL_Rect area; | |
| 22 Uint32 color; | |
| 23 | |
| 24 /* Seed the random number generator */ | |
| 25 if ( seeded == 0 ) { | |
| 26 srand(time(NULL)); | |
| 27 seeded = 1; | |
| 28 } | |
| 29 | |
| 30 /* Get the bounds of the rectangle */ | |
|
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31 area.w = (rand()%width); |
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bce7171e7a85
Date: Wed, 22 May 2002 22:30:58 +0300
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32 area.h = (rand()%height); |
| 0 | 33 area.x = X-(area.w/2); |
| 34 area.y = Y-(area.h/2); | |
| 35 color = (rand()%NUM_COLORS); | |
| 36 | |
| 37 /* Do it! */ | |
| 38 SDL_FillRect(screen, &area, color); | |
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39 if ( screen->flags & SDL_DOUBLEBUF ) { |
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40 SDL_Flip(screen); |
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41 } else { |
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42 SDL_UpdateRects(screen, 1, &area); |
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43 } |
| 0 | 44 } |
| 45 | |
| 46 SDL_Surface *CreateScreen(Uint16 w, Uint16 h, Uint8 bpp, Uint32 flags) | |
| 47 { | |
| 48 SDL_Surface *screen; | |
| 49 int i; | |
| 50 SDL_Color palette[NUM_COLORS]; | |
| 51 Uint8 *buffer; | |
| 52 | |
| 53 /* Set the video mode */ | |
| 54 screen = SDL_SetVideoMode(w, h, bpp, flags); | |
| 55 if ( screen == NULL ) { | |
| 56 fprintf(stderr, "Couldn't set display mode: %s\n", | |
| 57 SDL_GetError()); | |
| 58 return(NULL); | |
| 59 } | |
| 60 fprintf(stderr, "Screen is in %s mode\n", | |
| 61 (screen->flags & SDL_FULLSCREEN) ? "fullscreen" : "windowed"); | |
| 62 | |
| 63 /* Set a gray colormap, reverse order from white to black */ | |
| 64 for ( i=0; i<NUM_COLORS; ++i ) { | |
| 65 palette[i].r = (NUM_COLORS-1)-i * (256 / NUM_COLORS); | |
| 66 palette[i].g = (NUM_COLORS-1)-i * (256 / NUM_COLORS); | |
| 67 palette[i].b = (NUM_COLORS-1)-i * (256 / NUM_COLORS); | |
| 68 } | |
| 69 SDL_SetColors(screen, palette, 0, NUM_COLORS); | |
| 70 | |
| 71 /* Set the surface pixels and refresh! */ | |
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parents:
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72 /* Use two loops in case the surface is double-buffered (both sides) */ |
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73 for ( i=0; i<2; ++i ) { |
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74 if ( SDL_LockSurface(screen) < 0 ) { |
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75 fprintf(stderr, "Couldn't lock display surface: %s\n", |
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76 SDL_GetError()); |
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77 return(NULL); |
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78 } |
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parents:
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79 buffer = (Uint8 *)screen->pixels; |
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80 for ( i=0; i<screen->h; ++i ) { |
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81 memset(buffer,(i*(NUM_COLORS-1))/screen->h, screen->w * screen->format->BytesPerPixel); |
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82 buffer += screen->pitch; |
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83 } |
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84 SDL_UnlockSurface(screen); |
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parents:
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85 if ( screen->flags & SDL_DOUBLEBUF ) { |
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86 SDL_Flip(screen); |
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87 } else { |
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d3abe873e3f7
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parents:
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88 SDL_UpdateRect(screen, 0, 0, 0, 0); |
|
d3abe873e3f7
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parents:
380
diff
changeset
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89 } |
| 0 | 90 } |
| 91 | |
| 92 return(screen); | |
| 93 } | |
| 94 | |
| 95 int main(int argc, char *argv[]) | |
| 96 { | |
| 97 SDL_Surface *screen; | |
| 98 Uint32 videoflags; | |
| 99 int done; | |
| 100 SDL_Event event; | |
| 101 int width, height, bpp; | |
| 102 | |
| 103 /* Initialize SDL */ | |
| 104 if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) { | |
| 105 fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError()); | |
| 106 exit(1); | |
| 107 } | |
| 108 | |
| 109 /* See if we try to get a hardware colormap */ | |
| 110 width = 640; | |
| 111 height = 480; | |
| 112 bpp = 8; | |
| 113 videoflags = SDL_SWSURFACE; | |
| 114 while ( argc > 1 ) { | |
| 115 --argc; | |
| 116 if ( argv[argc-1] && (strcmp(argv[argc-1], "-width") == 0) ) { | |
| 117 width = atoi(argv[argc]); | |
| 118 --argc; | |
| 119 } else | |
| 120 if ( argv[argc-1] && (strcmp(argv[argc-1], "-height") == 0) ) { | |
| 121 height = atoi(argv[argc]); | |
| 122 --argc; | |
| 123 } else | |
| 124 if ( argv[argc-1] && (strcmp(argv[argc-1], "-bpp") == 0) ) { | |
| 125 bpp = atoi(argv[argc]); | |
| 126 --argc; | |
| 127 } else | |
| 128 if ( argv[argc] && (strcmp(argv[argc], "-hw") == 0) ) { | |
| 129 videoflags |= SDL_HWSURFACE; | |
| 130 } else | |
| 131 if ( argv[argc] && (strcmp(argv[argc], "-hwpalette") == 0) ) { | |
| 132 videoflags |= SDL_HWPALETTE; | |
| 133 } else | |
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d3abe873e3f7
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Sam Lantinga <slouken@libsdl.org>
parents:
380
diff
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134 if ( argv[argc] && (strcmp(argv[argc], "-flip") == 0) ) { |
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d3abe873e3f7
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parents:
380
diff
changeset
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135 videoflags |= SDL_DOUBLEBUF; |
|
d3abe873e3f7
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parents:
380
diff
changeset
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136 } else |
| 0 | 137 if ( argv[argc] && (strcmp(argv[argc], "-noframe") == 0) ) { |
| 138 videoflags |= SDL_NOFRAME; | |
| 139 } else | |
| 140 if ( argv[argc] && (strcmp(argv[argc], "-fullscreen") == 0) ) { | |
| 141 videoflags |= SDL_FULLSCREEN; | |
| 142 } else { | |
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parents:
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diff
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143 fprintf(stderr, "Usage: %s [-width] [-height] [-bpp] [-hw] [-hwpalette] [-flip] [-noframe] [-fullscreen]\n", |
| 0 | 144 argv[0]); |
| 145 exit(1); | |
| 146 } | |
| 147 } | |
| 148 | |
| 149 /* Set a video mode */ | |
| 150 screen = CreateScreen(width, height, bpp, videoflags); | |
| 151 if ( screen == NULL ) { | |
| 152 exit(2); | |
| 153 } | |
| 154 | |
| 155 /* Wait for a keystroke */ | |
| 156 done = 0; | |
| 157 while ( !done && SDL_WaitEvent(&event) ) { | |
| 158 switch (event.type) { | |
| 159 case SDL_MOUSEBUTTONDOWN: | |
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parents:
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diff
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160 DrawBox(screen, event.button.x, event.button.y, width, height); |
| 0 | 161 break; |
| 162 case SDL_KEYDOWN: | |
| 163 /* Ignore ALT-TAB for windows */ | |
| 164 if ( (event.key.keysym.sym == SDLK_LALT) || | |
| 165 (event.key.keysym.sym == SDLK_TAB) ) { | |
| 166 break; | |
| 167 } | |
| 168 /* Center the mouse on <SPACE> */ | |
| 169 if ( event.key.keysym.sym == SDLK_SPACE ) { | |
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Date: Wed, 22 May 2002 22:30:58 +0300
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parents:
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diff
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170 SDL_WarpMouse(width/2, height/2); |
| 0 | 171 break; |
| 172 } | |
| 173 /* Toggle fullscreen mode on <RETURN> */ | |
| 174 if ( event.key.keysym.sym == SDLK_RETURN ) { | |
| 175 videoflags ^= SDL_FULLSCREEN; | |
| 176 screen = CreateScreen( | |
| 177 screen->w, screen->h, | |
| 178 screen->format->BitsPerPixel, | |
| 179 videoflags); | |
| 180 if ( screen == NULL ) { | |
| 181 fprintf(stderr, | |
| 182 "Couldn't toggle fullscreen mode\n"); | |
| 183 done = 1; | |
| 184 } | |
| 185 break; | |
| 186 } | |
| 187 /* Any other key quits the application... */ | |
| 188 case SDL_QUIT: | |
| 189 done = 1; | |
| 190 break; | |
| 191 default: | |
| 192 break; | |
| 193 } | |
| 194 } | |
| 195 SDL_Quit(); | |
| 196 return(0); | |
| 197 } |