Mercurial > sdl-ios-xcode
annotate test/graywin.c @ 670:b8679559e432
*** empty log message ***
author | Sam Lantinga <slouken@libsdl.org> |
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date | Fri, 08 Aug 2003 18:00:39 +0000 |
parents | d3abe873e3f7 |
children | 609543e2b3a1 |
rev | line source |
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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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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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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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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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85 if ( screen->flags & SDL_DOUBLEBUF ) { |
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86 SDL_Flip(screen); |
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87 } else { |
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88 SDL_UpdateRect(screen, 0, 0, 0, 0); |
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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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134 if ( argv[argc] && (strcmp(argv[argc], "-flip") == 0) ) { |
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135 videoflags |= SDL_DOUBLEBUF; |
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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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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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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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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 } |