This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
testwin.c
1
2
3
4
5
6
7
8
9
10
11
12
13
/* Bring up a window and play with it */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#define BENCHMARK_SDL
#define NOTICE(X) printf("%s", X);
#include "SDL.h"
14
/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
15
16
static void
quit(int rc)
18
19
SDL_Quit();
exit(rc);
22
23
24
void
DrawPict(SDL_Surface * screen, char *bmpfile,
int speedy, int flip, int nofade)
26
27
28
29
30
SDL_Surface *picture;
SDL_Rect dest, update;
int i, centered;
int ncolors;
SDL_Color *colors, *cmap;
32
33
34
35
36
37
38
39
40
41
/* Load the image into a surface */
if (bmpfile == NULL) {
bmpfile = "sample.bmp"; /* Sample image */
}
fprintf(stderr, "Loading picture: %s\n", bmpfile);
picture = SDL_LoadBMP(bmpfile);
if (picture == NULL) {
fprintf(stderr, "Couldn't load %s: %s\n", bmpfile, SDL_GetError());
return;
}
43
44
45
46
47
48
49
50
51
/* Set the display colors -- on a hicolor display this is a no-op */
if (picture->format->palette) {
ncolors = picture->format->palette->ncolors;
colors = (SDL_Color *) malloc(ncolors * sizeof(SDL_Color));
cmap = (SDL_Color *) malloc(ncolors * sizeof(SDL_Color));
memcpy(colors, picture->format->palette->colors,
ncolors * sizeof(SDL_Color));
} else {
int r, g, b;
53
54
55
56
/* Allocate 256 color palette */
ncolors = 256;
colors = (SDL_Color *) malloc(ncolors * sizeof(SDL_Color));
cmap = (SDL_Color *) malloc(ncolors * sizeof(SDL_Color));
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
/* Set a 3,3,2 color cube */
for (r = 0; r < 8; ++r) {
for (g = 0; g < 8; ++g) {
for (b = 0; b < 4; ++b) {
i = ((r << 5) | (g << 2) | b);
colors[i].r = r << 5;
colors[i].g = g << 5;
colors[i].b = b << 6;
}
}
}
}
NOTICE("testwin: setting colors\n");
if (!SDL_SetColors(screen, colors, 0, ncolors) &&
(screen->format->palette != NULL)) {
fprintf(stderr,
"Warning: Couldn't set all of the colors, but SDL will map the image\n"
" (colormap fading will suffer - try the -warp option)\n");
}
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
/* Display the picture */
if (speedy) {
SDL_Surface *displayfmt;
fprintf(stderr, "Converting picture\n");
displayfmt = SDL_DisplayFormat(picture);
if (displayfmt == NULL) {
fprintf(stderr, "Couldn't convert image: %s\n", SDL_GetError());
goto done;
}
SDL_FreeSurface(picture);
picture = displayfmt;
}
printf("(image surface located in %s memory)\n",
(picture->flags & SDL_HWSURFACE) ? "video" : "system");
centered = (screen->w - picture->w) / 2;
if (centered < 0) {
centered = 0;
}
dest.y = (screen->h - picture->h) / 2;
dest.w = picture->w;
dest.h = picture->h;
NOTICE("testwin: moving image\n");
for (i = 0; i <= centered; ++i) {
dest.x = i;
update = dest;
if (SDL_BlitSurface(picture, NULL, screen, &update) < 0) {
fprintf(stderr, "Blit failed: %s\n", SDL_GetError());
break;
}
if (flip) {
SDL_Flip(screen);
} else {
SDL_UpdateRects(screen, 1, &update);
}
}
114
115
#ifdef SCREENSHOT
116
117
if (SDL_SaveBMP(screen, "screen.bmp") < 0)
printf("Couldn't save screen: %s\n", SDL_GetError());
118
119
120
#endif
#ifndef BENCHMARK_SDL
121
122
/* Let it sit there for a while */
SDL_Delay(5 * 1000);
123
#endif
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
/* Fade the colormap */
if (!nofade) {
int maxstep;
SDL_Color final;
SDL_Color palcolors[256];
struct
{
Sint16 r, g, b;
} cdist[256];
NOTICE("testwin: fading out...\n");
memcpy(cmap, colors, ncolors * sizeof(SDL_Color));
maxstep = 32 - 1;
final.r = 0xFF;
final.g = 0x00;
final.b = 0x00;
memcpy(palcolors, colors, ncolors * sizeof(SDL_Color));
for (i = 0; i < ncolors; ++i) {
cdist[i].r = final.r - palcolors[i].r;
cdist[i].g = final.g - palcolors[i].g;
cdist[i].b = final.b - palcolors[i].b;
}
for (i = 0; i <= maxstep / 2; ++i) { /* halfway fade */
int c;
for (c = 0; c < ncolors; ++c) {
colors[c].r = palcolors[c].r + ((cdist[c].r * i)) / maxstep;
colors[c].g = palcolors[c].g + ((cdist[c].g * i)) / maxstep;
colors[c].b = palcolors[c].b + ((cdist[c].b * i)) / maxstep;
}
SDL_SetColors(screen, colors, 0, ncolors);
SDL_Delay(1);
}
final.r = 0x00;
final.g = 0x00;
final.b = 0x00;
memcpy(palcolors, colors, ncolors * sizeof(SDL_Color));
for (i = 0; i < ncolors; ++i) {
cdist[i].r = final.r - palcolors[i].r;
cdist[i].g = final.g - palcolors[i].g;
cdist[i].b = final.b - palcolors[i].b;
}
maxstep /= 2;
for (i = 0; i <= maxstep; ++i) { /* finish fade out */
int c;
for (c = 0; c < ncolors; ++c) {
colors[c].r = palcolors[c].r + ((cdist[c].r * i)) / maxstep;
colors[c].g = palcolors[c].g + ((cdist[c].g * i)) / maxstep;
colors[c].b = palcolors[c].b + ((cdist[c].b * i)) / maxstep;
}
SDL_SetColors(screen, colors, 0, ncolors);
SDL_Delay(1);
}
for (i = 0; i < ncolors; ++i) {
colors[i].r = final.r;
colors[i].g = final.g;
colors[i].b = final.b;
}
SDL_SetColors(screen, colors, 0, ncolors);
NOTICE("testwin: fading in...\n");
memcpy(palcolors, colors, ncolors * sizeof(SDL_Color));
for (i = 0; i < ncolors; ++i) {
cdist[i].r = cmap[i].r - palcolors[i].r;
cdist[i].g = cmap[i].g - palcolors[i].g;
cdist[i].b = cmap[i].b - palcolors[i].b;
}
for (i = 0; i <= maxstep; ++i) { /* 32 step fade in */
int c;
for (c = 0; c < ncolors; ++c) {
colors[c].r = palcolors[c].r + ((cdist[c].r * i)) / maxstep;
colors[c].g = palcolors[c].g + ((cdist[c].g * i)) / maxstep;
colors[c].b = palcolors[c].b + ((cdist[c].b * i)) / maxstep;
}
SDL_SetColors(screen, colors, 0, ncolors);
SDL_Delay(1);
}
NOTICE("testwin: fading over\n");
}
202
203
204
205
206
207
done:
/* Free the picture and return */
SDL_FreeSurface(picture);
free(colors);
free(cmap);
return;
208
209
}
210
211
int
main(int argc, char *argv[])
212
{
213
214
215
216
217
218
219
SDL_Surface *screen;
/* Options */
int speedy, flip, nofade;
int delay;
int w, h;
int desired_bpp;
Uint32 video_flags;
220
#ifdef BENCHMARK_SDL
221
Uint32 then, now;
222
#endif
223
224
225
226
227
/* Set default options and check command-line */
speedy = 0;
flip = 0;
nofade = 0;
delay = 1;
228
229
#ifdef _WIN32_WCE
230
231
232
233
w = 240;
h = 320;
desired_bpp = 8;
video_flags = SDL_FULLSCREEN;
235
236
237
238
w = 640;
h = 480;
desired_bpp = 0;
video_flags = 0;
240
241
242
243
if (SDL_Init(SDL_INIT_VIDEO) < 0) {
fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
return (1);
}
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
while (argc > 1) {
if (strcmp(argv[1], "-speedy") == 0) {
speedy = 1;
argv += 1;
argc -= 1;
} else if (strcmp(argv[1], "-nofade") == 0) {
nofade = 1;
argv += 1;
argc -= 1;
} else if (strcmp(argv[1], "-delay") == 0) {
if (argv[2]) {
delay = atoi(argv[2]);
argv += 2;
argc -= 2;
} else {
fprintf(stderr, "The -delay option requires an argument\n");
quit(1);
}
} else if (strcmp(argv[1], "-width") == 0) {
if (argv[2] && ((w = atoi(argv[2])) > 0)) {
argv += 2;
argc -= 2;
} else {
fprintf(stderr, "The -width option requires an argument\n");
quit(1);
}
} else if (strcmp(argv[1], "-height") == 0) {
if (argv[2] && ((h = atoi(argv[2])) > 0)) {
argv += 2;
argc -= 2;
} else {
fprintf(stderr, "The -height option requires an argument\n");
quit(1);
}
} else if (strcmp(argv[1], "-bpp") == 0) {
if (argv[2]) {
desired_bpp = atoi(argv[2]);
argv += 2;
argc -= 2;
} else {
fprintf(stderr, "The -bpp option requires an argument\n");
quit(1);
}
} else if (strcmp(argv[1], "-warp") == 0) {
video_flags |= SDL_HWPALETTE;
argv += 1;
argc -= 1;
} else if (strcmp(argv[1], "-hw") == 0) {
video_flags |= SDL_HWSURFACE;
argv += 1;
argc -= 1;
} else if (strcmp(argv[1], "-flip") == 0) {
video_flags |= SDL_DOUBLEBUF;
argv += 1;
argc -= 1;
} else if (strcmp(argv[1], "-fullscreen") == 0) {
video_flags |= SDL_FULLSCREEN;
argv += 1;
argc -= 1;
} else
break;
}
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
/* Initialize the display */
screen = SDL_SetVideoMode(w, h, desired_bpp, video_flags);
if (screen == NULL) {
fprintf(stderr, "Couldn't set %dx%dx%d video mode: %s\n",
w, h, desired_bpp, SDL_GetError());
quit(1);
}
printf("Set%s %dx%dx%d mode\n",
screen->flags & SDL_FULLSCREEN ? " fullscreen" : "",
screen->w, screen->h, screen->format->BitsPerPixel);
printf("(video surface located in %s memory)\n",
(screen->flags & SDL_HWSURFACE) ? "video" : "system");
if (screen->flags & SDL_DOUBLEBUF) {
printf("Double-buffering enabled\n");
flip = 1;
}
325
326
/* Set the window manager title bar */
SDL_WM_SetCaption("SDL test window", "testwin");
328
/* Do all the drawing work */
329
#ifdef BENCHMARK_SDL
330
331
332
333
then = SDL_GetTicks();
DrawPict(screen, argv[1], speedy, flip, nofade);
now = SDL_GetTicks();
printf("Time: %d milliseconds\n", now - then);
334
#else
335
DrawPict(screen, argv[1], speedy, flip, nofade);
336
#endif
337
338
339
SDL_Delay(delay * 1000);
SDL_Quit();
return (0);
340
}