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annotate test/graywin.c @ 419:3d8ad40ef561
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| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Thu, 20 Jun 2002 17:47:18 +0000 |
| parents | bce7171e7a85 |
| children | d3abe873e3f7 |
| 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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Date: Wed, 22 May 2002 22:30:58 +0300
Sam Lantinga <slouken@libsdl.org>
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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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Date: Wed, 22 May 2002 22:30:58 +0300
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
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31 area.w = (rand()%width); |
|
bce7171e7a85
Date: Wed, 22 May 2002 22:30:58 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
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); | |
| 39 SDL_UpdateRects(screen, 1, &area); | |
| 40 } | |
| 41 | |
| 42 SDL_Surface *CreateScreen(Uint16 w, Uint16 h, Uint8 bpp, Uint32 flags) | |
| 43 { | |
| 44 SDL_Surface *screen; | |
| 45 int i; | |
| 46 SDL_Color palette[NUM_COLORS]; | |
| 47 Uint8 *buffer; | |
| 48 | |
| 49 /* Set the video mode */ | |
| 50 screen = SDL_SetVideoMode(w, h, bpp, flags); | |
| 51 if ( screen == NULL ) { | |
| 52 fprintf(stderr, "Couldn't set display mode: %s\n", | |
| 53 SDL_GetError()); | |
| 54 return(NULL); | |
| 55 } | |
| 56 fprintf(stderr, "Screen is in %s mode\n", | |
| 57 (screen->flags & SDL_FULLSCREEN) ? "fullscreen" : "windowed"); | |
| 58 | |
| 59 /* Set a gray colormap, reverse order from white to black */ | |
| 60 for ( i=0; i<NUM_COLORS; ++i ) { | |
| 61 palette[i].r = (NUM_COLORS-1)-i * (256 / NUM_COLORS); | |
| 62 palette[i].g = (NUM_COLORS-1)-i * (256 / NUM_COLORS); | |
| 63 palette[i].b = (NUM_COLORS-1)-i * (256 / NUM_COLORS); | |
| 64 } | |
| 65 SDL_SetColors(screen, palette, 0, NUM_COLORS); | |
| 66 | |
| 67 /* Set the surface pixels and refresh! */ | |
| 68 if ( SDL_LockSurface(screen) < 0 ) { | |
| 69 fprintf(stderr, "Couldn't lock display surface: %s\n", | |
| 70 SDL_GetError()); | |
| 71 return(NULL); | |
| 72 } | |
| 73 buffer = (Uint8 *)screen->pixels; | |
| 74 for ( i=0; i<screen->h; ++i ) { | |
|
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bce7171e7a85
Date: Wed, 22 May 2002 22:30:58 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
75 memset(buffer,(i*(NUM_COLORS-1))/screen->h, screen->w * screen->format->BytesPerPixel); |
| 0 | 76 buffer += screen->pitch; |
| 77 } | |
| 78 SDL_UnlockSurface(screen); | |
| 79 SDL_UpdateRect(screen, 0, 0, 0, 0); | |
| 80 | |
| 81 return(screen); | |
| 82 } | |
| 83 | |
| 84 int main(int argc, char *argv[]) | |
| 85 { | |
| 86 SDL_Surface *screen; | |
| 87 Uint32 videoflags; | |
| 88 int done; | |
| 89 SDL_Event event; | |
| 90 int width, height, bpp; | |
| 91 | |
| 92 /* Initialize SDL */ | |
| 93 if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) { | |
| 94 fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError()); | |
| 95 exit(1); | |
| 96 } | |
| 97 | |
| 98 /* See if we try to get a hardware colormap */ | |
| 99 width = 640; | |
| 100 height = 480; | |
| 101 bpp = 8; | |
| 102 videoflags = SDL_SWSURFACE; | |
| 103 while ( argc > 1 ) { | |
| 104 --argc; | |
| 105 if ( argv[argc-1] && (strcmp(argv[argc-1], "-width") == 0) ) { | |
| 106 width = atoi(argv[argc]); | |
| 107 --argc; | |
| 108 } else | |
| 109 if ( argv[argc-1] && (strcmp(argv[argc-1], "-height") == 0) ) { | |
| 110 height = atoi(argv[argc]); | |
| 111 --argc; | |
| 112 } else | |
| 113 if ( argv[argc-1] && (strcmp(argv[argc-1], "-bpp") == 0) ) { | |
| 114 bpp = atoi(argv[argc]); | |
| 115 --argc; | |
| 116 } else | |
| 117 if ( argv[argc] && (strcmp(argv[argc], "-hw") == 0) ) { | |
| 118 videoflags |= SDL_HWSURFACE; | |
| 119 } else | |
| 120 if ( argv[argc] && (strcmp(argv[argc], "-hwpalette") == 0) ) { | |
| 121 videoflags |= SDL_HWPALETTE; | |
| 122 } else | |
| 123 if ( argv[argc] && (strcmp(argv[argc], "-noframe") == 0) ) { | |
| 124 videoflags |= SDL_NOFRAME; | |
| 125 } else | |
| 126 if ( argv[argc] && (strcmp(argv[argc], "-fullscreen") == 0) ) { | |
| 127 videoflags |= SDL_FULLSCREEN; | |
| 128 } else { | |
|
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bce7171e7a85
Date: Wed, 22 May 2002 22:30:58 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
129 fprintf(stderr, "Usage: %s [-width] [-height] [-bpp] [-hw] [-hwpalette] [-noframe] [-fullscreen]\n", |
| 0 | 130 argv[0]); |
| 131 exit(1); | |
| 132 } | |
| 133 } | |
| 134 | |
| 135 /* Set a video mode */ | |
| 136 screen = CreateScreen(width, height, bpp, videoflags); | |
| 137 if ( screen == NULL ) { | |
| 138 exit(2); | |
| 139 } | |
| 140 | |
| 141 /* Wait for a keystroke */ | |
| 142 done = 0; | |
| 143 while ( !done && SDL_WaitEvent(&event) ) { | |
| 144 switch (event.type) { | |
| 145 case SDL_MOUSEBUTTONDOWN: | |
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bce7171e7a85
Date: Wed, 22 May 2002 22:30:58 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
146 DrawBox(screen, event.button.x, event.button.y, width, height); |
| 0 | 147 break; |
| 148 case SDL_KEYDOWN: | |
| 149 /* Ignore ALT-TAB for windows */ | |
| 150 if ( (event.key.keysym.sym == SDLK_LALT) || | |
| 151 (event.key.keysym.sym == SDLK_TAB) ) { | |
| 152 break; | |
| 153 } | |
| 154 /* Center the mouse on <SPACE> */ | |
| 155 if ( event.key.keysym.sym == SDLK_SPACE ) { | |
|
380
bce7171e7a85
Date: Wed, 22 May 2002 22:30:58 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
156 SDL_WarpMouse(width/2, height/2); |
| 0 | 157 break; |
| 158 } | |
| 159 /* Toggle fullscreen mode on <RETURN> */ | |
| 160 if ( event.key.keysym.sym == SDLK_RETURN ) { | |
| 161 videoflags ^= SDL_FULLSCREEN; | |
| 162 screen = CreateScreen( | |
| 163 screen->w, screen->h, | |
| 164 screen->format->BitsPerPixel, | |
| 165 videoflags); | |
| 166 if ( screen == NULL ) { | |
| 167 fprintf(stderr, | |
| 168 "Couldn't toggle fullscreen mode\n"); | |
| 169 done = 1; | |
| 170 } | |
| 171 break; | |
| 172 } | |
| 173 /* Any other key quits the application... */ | |
| 174 case SDL_QUIT: | |
| 175 done = 1; | |
| 176 break; | |
| 177 default: | |
| 178 break; | |
| 179 } | |
| 180 } | |
| 181 SDL_Quit(); | |
| 182 return(0); | |
| 183 } |