/
testvidinfo.c
265 lines (247 loc) · 6.43 KB
1
2
3
/* Simple program -- figure out what kind of video display we have */
4
#include <stdlib.h>
5
6
7
8
9
#include <stdio.h>
#include <stdlib.h>
#include "SDL.h"
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
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
114
115
116
117
118
119
120
121
122
123
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
#define FLAG_MASK (SDL_HWSURFACE | SDL_FULLSCREEN | SDL_DOUBLEBUF)
void PrintFlags(Uint32 flags)
{
printf("0x%8.8x", (flags & FLAG_MASK));
if ( flags & SDL_HWSURFACE ) {
printf(" SDL_HWSURFACE");
} else {
printf(" SDL_SWSURFACE");
}
if ( flags & SDL_FULLSCREEN ) {
printf(" | SDL_FULLSCREEN");
}
if ( flags & SDL_DOUBLEBUF ) {
printf(" | SDL_DOUBLEBUF");
}
}
int RunBlitTests(SDL_Surface *screen, SDL_Surface *bmp, int blitcount)
{
int i, j;
int maxx;
int maxy;
SDL_Rect *rects;
rects = (SDL_Rect *)malloc(blitcount * sizeof(*rects));
if ( ! rects ) {
return 0;
}
maxx = (int)screen->w - bmp->w;
maxy = (int)screen->h - bmp->h;
for ( i = 0; i < 100; ++i ) {
for ( j = 0; j < blitcount; ++j ) {
if ( maxx ) {
rects[j].x = rand() % maxx;
} else {
rects[j].x = 0;
}
if ( maxy ) {
rects[j].y = rand() % maxy;
} else {
rects[j].y = 0;
}
rects[j].w = bmp->w;
rects[j].h = bmp->h;
SDL_BlitSurface(bmp, NULL, screen, &rects[j]);
}
if ( screen->flags & SDL_DOUBLEBUF ) {
SDL_Flip(screen);
} else {
SDL_UpdateRects(screen, blitcount, rects);
}
}
free(rects);
return i;
}
void RunModeTests(SDL_Surface *screen)
{
Uint32 then, now;
Uint32 frames;
int i;
Uint8 r, g, b;
Uint32 pixel;
SDL_Surface *bmp, *tmp;
/* First test fills and screen update speed */
printf("Running color fill and fullscreen update test\n");
then = SDL_GetTicks();
frames = 0;
for ( i = 0; i < 256; ++i ) {
r = i;
g = 0;
b = 0;
SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, r, g, b));
SDL_Flip(screen);
++frames;
}
for ( i = 0; i < 256; ++i ) {
r = 0;
g = i;
b = 0;
SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, r, g, b));
SDL_Flip(screen);
++frames;
}
for ( i = 0; i < 256; ++i ) {
r = 0;
g = 0;
b = i;
SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, r, g, b));
SDL_Flip(screen);
++frames;
}
now = SDL_GetTicks();
printf("%d fills and flips, %f FPS\n", frames, (float)(now - then) / frames);
bmp = SDL_LoadBMP("sample.bmp");
if ( ! bmp ) {
printf("Couldn't load sample.bmp: %s\n", SDL_GetError());
return;
}
printf("Running freshly loaded blit test: %dx%d at %d bpp, flags: ",
bmp->w, bmp->h, bmp->format->BitsPerPixel);
PrintFlags(bmp->flags);
printf("\n");
then = SDL_GetTicks();
frames = RunBlitTests(screen, bmp, 10);
now = SDL_GetTicks();
if ( frames ) {
printf("%d blits, %d updates, %f FPS\n", 10*frames, frames, (float)(now - then) / frames);
}
tmp = bmp;
bmp = SDL_DisplayFormat(bmp);
SDL_FreeSurface(tmp);
if ( ! bmp ) {
printf("Couldn't convert sample.bmp: %s\n", SDL_GetError());
return;
}
printf("Running display format blit test: %dx%d at %d bpp, flags: ",
bmp->w, bmp->h, bmp->format->BitsPerPixel);
PrintFlags(bmp->flags);
printf("\n");
then = SDL_GetTicks();
frames = RunBlitTests(screen, bmp, 10);
now = SDL_GetTicks();
if ( frames ) {
printf("%d blits, %d updates, %f FPS\n", 10*frames, frames, (float)(now - then) / frames);
}
SDL_FreeSurface(bmp);
}
void RunVideoTests()
{
static const struct {
int w, h, bpp;
} mode_list[] = {
{ 640, 480, 8 }, { 640, 480, 16 }, { 640, 480, 32 },
{ 800, 600, 8 }, { 800, 600, 16 }, { 800, 600, 32 },
{ 1024, 768, 8 }, { 1024, 768, 16 }, { 1024, 768, 32 }
};
static const Uint32 flags[] = {
(SDL_SWSURFACE),
(SDL_SWSURFACE | SDL_FULLSCREEN),
(SDL_HWSURFACE | SDL_FULLSCREEN),
(SDL_HWSURFACE | SDL_FULLSCREEN | SDL_DOUBLEBUF)
};
int i, j;
SDL_Surface *screen;
/* Test out several different video mode combinations */
for ( i = 0; i < SDL_TABLESIZE(mode_list); ++i ) {
for ( j = 0; j < SDL_TABLESIZE(flags); ++j ) {
printf("===================================\n");
printf("Setting video mode: %dx%d at %d bpp, flags: ",
mode_list[i].w,
mode_list[i].h,
mode_list[i].bpp);
PrintFlags(flags[j]);
printf("\n");
screen = SDL_SetVideoMode(mode_list[i].w,
mode_list[i].h,
mode_list[i].bpp,
flags[j]);
if ( ! screen ) {
printf("Setting video mode failed: %s\n", SDL_GetError());
continue;
}
if ( (screen->flags & FLAG_MASK) != flags[j] ) {
printf("Flags didn't match: ");
PrintFlags(screen->flags);
printf("\n");
continue;
}
RunModeTests(screen);
}
}
}
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
int main(int argc, char *argv[])
{
const SDL_VideoInfo *info;
int i;
SDL_Rect **modes;
if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
fprintf(stderr,
"Couldn't initialize SDL: %s\n", SDL_GetError());
exit(1);
}
info = SDL_GetVideoInfo();
printf(
"Current display: %d bits-per-pixel\n",info->vfmt->BitsPerPixel);
if ( info->vfmt->palette == NULL ) {
printf(" Red Mask = 0x%.8x\n", info->vfmt->Rmask);
printf(" Green Mask = 0x%.8x\n", info->vfmt->Gmask);
printf(" Blue Mask = 0x%.8x\n", info->vfmt->Bmask);
}
/* Print available fullscreen video modes */
modes = SDL_ListModes(NULL, SDL_FULLSCREEN);
if ( modes == (SDL_Rect **)0 ) {
printf("No available fullscreen video modes\n");
} else
if ( modes == (SDL_Rect **)-1 ) {
printf("No special fullscreen video modes\n");
} else {
printf("Fullscreen video modes:\n");
for ( i=0; modes[i]; ++i ) {
220
printf("\t%dx%dx%d\n", modes[i]->w, modes[i]->h, info->vfmt->BitsPerPixel);
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
}
}
if ( info->wm_available ) {
printf("A window manager is available\n");
}
if ( info->hw_available ) {
printf("Hardware surfaces are available (%dK video memory)\n",
info->video_mem);
}
if ( info->blit_hw ) {
printf(
"Copy blits between hardware surfaces are accelerated\n");
}
if ( info->blit_hw_CC ) {
printf(
"Colorkey blits between hardware surfaces are accelerated\n");
}
if ( info->blit_hw_A ) {
printf(
"Alpha blits between hardware surfaces are accelerated\n");
}
if ( info->blit_sw ) {
printf(
"Copy blits from software surfaces to hardware surfaces are accelerated\n");
}
if ( info->blit_sw_CC ) {
printf(
"Colorkey blits from software surfaces to hardware surfaces are accelerated\n");
}
if ( info->blit_sw_A ) {
printf(
"Alpha blits from software surfaces to hardware surfaces are accelerated\n");
}
if ( info->blit_fill ) {
printf(
"Color fills on hardware surfaces are accelerated\n");
}
258
259
260
261
262
if ( argv[1] && (strcmp(argv[1], "-benchmark") == 0) ) {
RunVideoTests();
}
263
264
265
SDL_Quit();
return(0);
}