test/testwin.c
/* [<][>][^][v][top][bottom][index][help] */
FUNCTIONS
This source file includes following functions.
- NOTICE
- DrawPict
- main
1
2 /* Bring up a window and play with it */
3
4 #include <stdlib.h>
5 #include <stdio.h>
6 #include <string.h>
7
8 #define BENCHMARK_SDL
9
10 #define NOTICE(X) printf("%s", X);
/* [<][>][^][v][top][bottom][index][help] */
11
12 #include "SDL.h"
13
14 void DrawPict(SDL_Surface *screen, char *bmpfile,
/* [<][>][^][v][top][bottom][index][help] */
15 int speedy, int flip, int nofade)
16 {
17 SDL_Surface *picture;
18 SDL_Rect dest, update;
19 int i, centered;
20 int ncolors;
21 SDL_Color *colors, *cmap;
22
23 /* Load the image into a surface */
24 if ( bmpfile == NULL ) {
25 bmpfile = "sample.bmp"; /* Sample image */
26 }
27 fprintf(stderr, "Loading picture: %s\n", bmpfile);
28 picture = SDL_LoadBMP(bmpfile);
29 if ( picture == NULL ) {
30 fprintf(stderr, "Couldn't load %s: %s\n", bmpfile,
31 SDL_GetError());
32 return;
33 }
34
35 /* Set the display colors -- on a hicolor display this is a no-op */
36 if ( picture->format->palette ) {
37 ncolors = picture->format->palette->ncolors;
38 colors = (SDL_Color *)malloc(ncolors*sizeof(SDL_Color));
39 cmap = (SDL_Color *)malloc(ncolors*sizeof(SDL_Color));
40 memcpy(colors, picture->format->palette->colors,
41 ncolors*sizeof(SDL_Color));
42 } else {
43 int r, g, b;
44
45 /* Allocate 256 color palette */
46 ncolors = 256;
47 colors = (SDL_Color *)malloc(ncolors*sizeof(SDL_Color));
48 cmap = (SDL_Color *)malloc(ncolors*sizeof(SDL_Color));
49
50 /* Set a 3,3,2 color cube */
51 for ( r=0; r<8; ++r ) {
52 for ( g=0; g<8; ++g ) {
53 for ( b=0; b<4; ++b ) {
54 i = ((r<<5)|(g<<2)|b);
55 colors[i].r = r<<5;
56 colors[i].g = g<<5;
57 colors[i].b = b<<6;
58 }
59 }
60 }
61 }
62 NOTICE("testwin: setting colors\n");
63 if ( ! SDL_SetColors(screen, colors, 0, ncolors) &&
64 (screen->format->palette != NULL) ) {
65 fprintf(stderr,
66 "Warning: Couldn't set all of the colors, but SDL will map the image\n"
67 " (colormap fading will suffer - try the -warp option)\n"
68 );
69 }
70
71 /* Set the screen to black (not really necessary) */
72 if ( SDL_LockSurface(screen) == 0 ) {
73 Uint32 black;
74 Uint8 *pixels;
75
76 black = SDL_MapRGB(screen->format, 0, 0, 0);
77 pixels = (Uint8 *)screen->pixels;
78 for ( i=0; i<screen->h; ++i ) {
79 memset(pixels, black,
80 screen->w*screen->format->BytesPerPixel);
81 pixels += screen->pitch;
82 }
83 SDL_UnlockSurface(screen);
84 SDL_UpdateRect(screen, 0, 0, 0, 0);
85 }
86
87 /* Display the picture */
88 if ( speedy ) {
89 SDL_Surface *displayfmt;
90
91 fprintf(stderr, "Converting picture\n");
92 displayfmt = SDL_DisplayFormat(picture);
93 if ( displayfmt == NULL ) {
94 fprintf(stderr,
95 "Couldn't convert image: %s\n", SDL_GetError());
96 goto done;
97 }
98 SDL_FreeSurface(picture);
99 picture = displayfmt;
100 }
101 printf("(image surface located in %s memory)\n",
102 (picture->flags&SDL_HWSURFACE) ? "video" : "system");
103 centered = (screen->w - picture->w)/2;
104 if ( centered < 0 ) {
105 centered = 0;
106 }
107 dest.y = (screen->h - picture->h)/2;
108 dest.w = picture->w;
109 dest.h = picture->h;
110 NOTICE("testwin: moving image\n");
111 for ( i=0; i<=centered; ++i ) {
112 dest.x = i;
113 update = dest;
114 if ( SDL_BlitSurface(picture, NULL, screen, &update) < 0 ) {
115 fprintf(stderr, "Blit failed: %s\n", SDL_GetError());
116 break;
117 }
118 if ( flip ) {
119 SDL_Flip(screen);
120 } else {
121 SDL_UpdateRects(screen, 1, &update);
122 }
123 }
124
125 #ifdef SCREENSHOT
126 if ( SDL_SaveBMP(screen, "screen.bmp") < 0 )
127 printf("Couldn't save screen: %s\n", SDL_GetError());
128 #endif
129
130 #ifndef BENCHMARK_SDL
131 /* Let it sit there for a while */
132 SDL_Delay(5*1000);
133 #endif
134 /* Fade the colormap */
135 if ( ! nofade ) {
136 int maxstep;
137 SDL_Color final;
138 SDL_Color palcolors[256];
139 struct {
140 Sint16 r, g, b;
141 } cdist[256];
142
143 NOTICE("testwin: fading out...\n");
144 memcpy(cmap, colors, ncolors*sizeof(SDL_Color));
145 maxstep = 32-1;
146 final.r = 0xFF;
147 final.g = 0x00;
148 final.b = 0x00;
149 memcpy(palcolors, colors, ncolors*sizeof(SDL_Color));
150 for ( i=0; i<ncolors; ++i ) {
151 cdist[i].r = final.r-palcolors[i].r;
152 cdist[i].g = final.g-palcolors[i].g;
153 cdist[i].b = final.b-palcolors[i].b;
154 }
155 for ( i=0; i<=maxstep/2; ++i ) { /* halfway fade */
156 int c;
157 for ( c=0; c<ncolors; ++c ) {
158 colors[c].r =
159 palcolors[c].r+((cdist[c].r*i))/maxstep;
160 colors[c].g =
161 palcolors[c].g+((cdist[c].g*i))/maxstep;
162 colors[c].b =
163 palcolors[c].b+((cdist[c].b*i))/maxstep;
164 }
165 SDL_SetColors(screen, colors, 0, ncolors);
166 SDL_Delay(1);
167 }
168 final.r = 0x00;
169 final.g = 0x00;
170 final.b = 0x00;
171 memcpy(palcolors, colors, ncolors*sizeof(SDL_Color));
172 for ( i=0; i<ncolors; ++i ) {
173 cdist[i].r = final.r-palcolors[i].r;
174 cdist[i].g = final.g-palcolors[i].g;
175 cdist[i].b = final.b-palcolors[i].b;
176 }
177 maxstep /= 2;
178 for ( i=0; i<=maxstep; ++i ) { /* finish fade out */
179 int c;
180 for ( c=0; c<ncolors; ++c ) {
181 colors[c].r =
182 palcolors[c].r+((cdist[c].r*i))/maxstep;
183 colors[c].g =
184 palcolors[c].g+((cdist[c].g*i))/maxstep;
185 colors[c].b =
186 palcolors[c].b+((cdist[c].b*i))/maxstep;
187 }
188 SDL_SetColors(screen, colors, 0, ncolors);
189 SDL_Delay(1);
190 }
191 for ( i=0; i<ncolors; ++i ) {
192 colors[i].r = final.r;
193 colors[i].g = final.g;
194 colors[i].b = final.b;
195 }
196 SDL_SetColors(screen, colors, 0, ncolors);
197 NOTICE("testwin: fading in...\n");
198 memcpy(palcolors, colors, ncolors*sizeof(SDL_Color));
199 for ( i=0; i<ncolors; ++i ) {
200 cdist[i].r = cmap[i].r-palcolors[i].r;
201 cdist[i].g = cmap[i].g-palcolors[i].g;
202 cdist[i].b = cmap[i].b-palcolors[i].b;
203 }
204 for ( i=0; i<=maxstep; ++i ) { /* 32 step fade in */
205 int c;
206 for ( c=0; c<ncolors; ++c ) {
207 colors[c].r =
208 palcolors[c].r+((cdist[c].r*i))/maxstep;
209 colors[c].g =
210 palcolors[c].g+((cdist[c].g*i))/maxstep;
211 colors[c].b =
212 palcolors[c].b+((cdist[c].b*i))/maxstep;
213 }
214 SDL_SetColors(screen, colors, 0, ncolors);
215 SDL_Delay(1);
216 }
217 NOTICE("testwin: fading over\n");
218 }
219
220 done:
221 /* Free the picture and return */
222 SDL_FreeSurface(picture);
223 free(colors); free(cmap);
224 return;
225 }
226
227 int main(int argc, char *argv[])
/* [<][>][^][v][top][bottom][index][help] */
228 {
229 SDL_Surface *screen;
230 /* Options */
231 int speedy, flip, nofade;
232 int delay;
233 int w, h;
234 int desired_bpp;
235 Uint32 video_flags;
236 #ifdef BENCHMARK_SDL
237 Uint32 then, now;
238 #endif
239 /* Set default options and check command-line */
240 speedy = 0;
241 flip = 0;
242 nofade = 0;
243 delay = 1;
244 w = 640;
245 h = 480;
246 desired_bpp = 0;
247 video_flags = 0;
248 while ( argc > 1 ) {
249 if ( strcmp(argv[1], "-speedy") == 0 ) {
250 speedy = 1;
251 argv += 1;
252 argc -= 1;
253 } else
254 if ( strcmp(argv[1], "-nofade") == 0 ) {
255 nofade = 1;
256 argv += 1;
257 argc -= 1;
258 } else
259 if ( strcmp(argv[1], "-delay") == 0 ) {
260 if ( argv[2] ) {
261 delay = atoi(argv[2]);
262 argv += 2;
263 argc -= 2;
264 } else {
265 fprintf(stderr,
266 "The -delay option requires an argument\n");
267 exit(1);
268 }
269 } else
270 if ( strcmp(argv[1], "-width") == 0 ) {
271 if ( argv[2] && ((w = atoi(argv[2])) > 0) ) {
272 argv += 2;
273 argc -= 2;
274 } else {
275 fprintf(stderr,
276 "The -width option requires an argument\n");
277 exit(1);
278 }
279 } else
280 if ( strcmp(argv[1], "-height") == 0 ) {
281 if ( argv[2] && ((h = atoi(argv[2])) > 0) ) {
282 argv += 2;
283 argc -= 2;
284 } else {
285 fprintf(stderr,
286 "The -height option requires an argument\n");
287 exit(1);
288 }
289 } else
290 if ( strcmp(argv[1], "-bpp") == 0 ) {
291 if ( argv[2] ) {
292 desired_bpp = atoi(argv[2]);
293 argv += 2;
294 argc -= 2;
295 } else {
296 fprintf(stderr,
297 "The -bpp option requires an argument\n");
298 exit(1);
299 }
300 } else
301 if ( strcmp(argv[1], "-warp") == 0 ) {
302 video_flags |= SDL_HWPALETTE;
303 argv += 1;
304 argc -= 1;
305 } else
306 if ( strcmp(argv[1], "-hw") == 0 ) {
307 video_flags |= SDL_HWSURFACE;
308 argv += 1;
309 argc -= 1;
310 } else
311 if ( strcmp(argv[1], "-flip") == 0 ) {
312 video_flags |= SDL_DOUBLEBUF;
313 argv += 1;
314 argc -= 1;
315 } else
316 if ( strcmp(argv[1], "-fullscreen") == 0 ) {
317 video_flags |= SDL_FULLSCREEN;
318 argv += 1;
319 argc -= 1;
320 } else
321 break;
322 }
323
324 if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
325 fprintf(stderr,
326 "Couldn't initialize SDL: %s\n", SDL_GetError());
327 exit(1);
328 }
329 atexit(SDL_Quit); /* Clean up on exit */
330
331 /* Initialize the display */
332 screen = SDL_SetVideoMode(w, h, desired_bpp, video_flags);
333 if ( screen == NULL ) {
334 fprintf(stderr, "Couldn't set %dx%dx%d video mode: %s\n",
335 w, h, desired_bpp, SDL_GetError());
336 exit(1);
337 }
338 printf("Set %dx%dx%d mode\n",
339 screen->w, screen->h, screen->format->BitsPerPixel);
340 printf("(video surface located in %s memory)\n",
341 (screen->flags&SDL_HWSURFACE) ? "video" : "system");
342 if ( screen->flags & SDL_DOUBLEBUF ) {
343 printf("Double-buffering enabled\n");
344 flip = 1;
345 }
346
347 /* Set the window manager title bar */
348 SDL_WM_SetCaption("SDL test window", "testwin");
349
350 /* Do all the drawing work */
351 #ifdef BENCHMARK_SDL
352 then = SDL_GetTicks();
353 DrawPict(screen, argv[1], speedy, flip, nofade);
354 now = SDL_GetTicks();
355 printf("Time: %d milliseconds\n", now-then);
356 #else
357 DrawPict(screen, argv[1], speedy, flip, nofade);
358 #endif
359 SDL_Delay(delay*1000);
360 return(0);
361 }