/
plat_sdl.c
304 lines (265 loc) · 7.83 KB
/
plat_sdl.c
1
2
3
4
5
6
7
8
9
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
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
220
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
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
/*
* (C) Gražvydas "notaz" Ignotas, 2012
*
* This work is licensed under the terms of any of these licenses
* (at your option):
* - GNU GPL, version 2 or later.
* - GNU LGPL, version 2.1 or later.
* - MAME license.
* See the COPYING file in the top-level directory.
*/
#include <stdio.h>
#include <SDL.h>
#include <SDL_syswm.h>
#include "menu.h"
#include "plat.h"
#include "gl.h"
#include "plat_sdl.h"
// XXX: maybe determine this instead..
#define WM_DECORATION_H 32
SDL_Surface *plat_sdl_screen;
SDL_Overlay *plat_sdl_overlay;
int plat_sdl_gl_active;
void (*plat_sdl_resize_cb)(int w, int h);
void (*plat_sdl_quit_cb)(void);
static char vid_drv_name[32];
static int window_w, window_h;
static int fs_w, fs_h;
static int old_fullscreen;
static int vout_mode_overlay = -1, vout_mode_gl = -1;
static void *display, *window;
static int gl_quirks;
/* w, h is layer resolution */
int plat_sdl_change_video_mode(int w, int h, int force)
{
static int prev_w, prev_h;
if (w == 0)
w = prev_w;
else
prev_w = w;
if (h == 0)
h = prev_h;
else
prev_h = h;
// skip GL recreation if window doesn't change - avoids flicker
if (plat_target.vout_method == vout_mode_gl && plat_sdl_gl_active
&& plat_target.vout_fullscreen == old_fullscreen && !force)
{
return 0;
}
if (plat_sdl_overlay != NULL) {
SDL_FreeYUVOverlay(plat_sdl_overlay);
plat_sdl_overlay = NULL;
}
if (plat_sdl_gl_active) {
gl_finish();
plat_sdl_gl_active = 0;
}
if (plat_target.vout_method != 0) {
Uint32 flags = SDL_RESIZABLE | SDL_SWSURFACE;
int win_w = window_w;
int win_h = window_h;
if (plat_target.vout_fullscreen) {
flags |= SDL_FULLSCREEN;
win_w = fs_w;
win_h = fs_h;
}
// XXX: workaround some occasional mysterious deadlock in SDL_SetVideoMode
SDL_PumpEvents();
plat_sdl_screen = SDL_SetVideoMode(win_w, win_h, 0, flags);
if (plat_sdl_screen == NULL) {
fprintf(stderr, "SDL_SetVideoMode failed: %s\n", SDL_GetError());
plat_target.vout_method = 0;
}
}
if (plat_target.vout_method == vout_mode_overlay) {
plat_sdl_overlay = SDL_CreateYUVOverlay(w, h, SDL_UYVY_OVERLAY, plat_sdl_screen);
if (plat_sdl_overlay != NULL) {
if ((long)plat_sdl_overlay->pixels[0] & 3)
fprintf(stderr, "warning: overlay pointer is unaligned\n");
plat_sdl_overlay_clear();
}
else {
fprintf(stderr, "warning: could not create overlay.\n");
plat_target.vout_method = 0;
}
}
else if (plat_target.vout_method == vout_mode_gl) {
plat_sdl_gl_active = (gl_init(display, window, &gl_quirks) == 0);
if (!plat_sdl_gl_active) {
fprintf(stderr, "warning: could not init GL.\n");
plat_target.vout_method = 0;
}
}
if (plat_target.vout_method == 0) {
SDL_PumpEvents();
plat_sdl_screen = SDL_SetVideoMode(w, h, 16, SDL_SWSURFACE);
if (plat_sdl_screen == NULL) {
fprintf(stderr, "SDL_SetVideoMode failed: %s\n", SDL_GetError());
return -1;
}
}
old_fullscreen = plat_target.vout_fullscreen;
if (plat_sdl_resize_cb != NULL)
plat_sdl_resize_cb(plat_sdl_screen->w, plat_sdl_screen->h);
return 0;
}
void plat_sdl_event_handler(void *event_)
{
static int was_active;
SDL_Event *event = event_;
switch (event->type) {
case SDL_VIDEORESIZE:
//printf("resize %dx%d\n", event->resize.w, event->resize.h);
if (plat_target.vout_method != 0
&& !plat_target.vout_fullscreen && !old_fullscreen)
{
window_w = event->resize.w;
window_h = event->resize.h;
plat_sdl_change_video_mode(0, 0, 1);
}
break;
case SDL_ACTIVEEVENT:
if (event->active.gain && !was_active) {
if (plat_sdl_overlay != NULL) {
SDL_Rect dstrect = { 0, 0, plat_sdl_screen->w, plat_sdl_screen->h };
SDL_DisplayYUVOverlay(plat_sdl_overlay, &dstrect);
}
else if (plat_sdl_gl_active) {
if (gl_quirks & GL_QUIRK_ACTIVATE_RECREATE) {
gl_finish();
plat_sdl_gl_active = (gl_init(display, window, &gl_quirks) == 0);
}
gl_flip(NULL, 0, 0);
}
// else SDL takes care of it
}
was_active = event->active.gain;
break;
case SDL_QUIT:
if (plat_sdl_quit_cb != NULL)
plat_sdl_quit_cb();
break;
}
}
int plat_sdl_init(void)
{
static const char *vout_list[] = { NULL, NULL, NULL, NULL };
const SDL_VideoInfo *info;
SDL_SysWMinfo wminfo;
int overlay_works = 0;
int gl_works = 0;
int i, ret, h;
ret = SDL_Init(SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE);
if (ret != 0) {
fprintf(stderr, "SDL_Init failed: %s\n", SDL_GetError());
return -1;
}
info = SDL_GetVideoInfo();
if (info != NULL) {
fs_w = info->current_w;
fs_h = info->current_h;
printf("plat_sdl: using %dx%d as fullscreen resolution\n", fs_w, fs_h);
}
g_menuscreen_w = 640;
if (fs_w != 0 && g_menuscreen_w > fs_w)
g_menuscreen_w = fs_w;
g_menuscreen_h = 480;
if (fs_h != 0) {
h = fs_h;
if (info && info->wm_available && h > WM_DECORATION_H)
h -= WM_DECORATION_H;
if (g_menuscreen_h > h)
g_menuscreen_h = h;
}
ret = plat_sdl_change_video_mode(g_menuscreen_w, g_menuscreen_h, 1);
if (ret != 0) {
plat_sdl_screen = SDL_SetVideoMode(0, 0, 16, SDL_SWSURFACE);
if (plat_sdl_screen == NULL) {
fprintf(stderr, "SDL_SetVideoMode failed: %s\n", SDL_GetError());
goto fail;
}
if (plat_sdl_screen->w < 320 || plat_sdl_screen->h < 240) {
fprintf(stderr, "resolution %dx%d is too small, sorry.\n",
plat_sdl_screen->w, plat_sdl_screen->h);
goto fail;
}
}
g_menuscreen_w = window_w = plat_sdl_screen->w;
g_menuscreen_h = window_h = plat_sdl_screen->h;
plat_sdl_overlay = SDL_CreateYUVOverlay(plat_sdl_screen->w, plat_sdl_screen->h,
SDL_UYVY_OVERLAY, plat_sdl_screen);
if (plat_sdl_overlay != NULL) {
printf("plat_sdl: overlay: fmt %x, planes: %d, pitch: %d, hw: %d\n",
plat_sdl_overlay->format, plat_sdl_overlay->planes, *plat_sdl_overlay->pitches,
plat_sdl_overlay->hw_overlay);
if (plat_sdl_overlay->hw_overlay)
overlay_works = 1;
else
fprintf(stderr, "warning: video overlay is not hardware accelerated, "
"not going to use it.\n");
SDL_FreeYUVOverlay(plat_sdl_overlay);
plat_sdl_overlay = NULL;
}
else
fprintf(stderr, "overlay is not available.\n");
// get x11 display/window for GL
SDL_VideoDriverName(vid_drv_name, sizeof(vid_drv_name));
#ifdef SDL_VIDEO_DRIVER_X11
if (strcmp(vid_drv_name, "x11") == 0) {
SDL_VERSION(&wminfo.version);
ret = SDL_GetWMInfo(&wminfo);
if (ret > 0) {
display = wminfo.info.x11.display;
window = (void *)wminfo.info.x11.window;
}
}
#endif
ret = gl_init(display, window, &gl_quirks);
if (ret == 0) {
gl_works = 1;
gl_finish();
}
i = 0;
vout_list[i++] = "SDL Window";
if (overlay_works) {
plat_target.vout_method = vout_mode_overlay = i;
vout_list[i++] = "Video Overlay";
}
if (gl_works) {
plat_target.vout_method = vout_mode_gl = i;
vout_list[i++] = "OpenGL";
}
plat_target.vout_methods = vout_list;
return 0;
fail:
SDL_Quit();
return -1;
}
void plat_sdl_finish(void)
{
if (plat_sdl_overlay != NULL) {
SDL_FreeYUVOverlay(plat_sdl_overlay);
plat_sdl_overlay = NULL;
}
if (plat_sdl_gl_active) {
gl_finish();
plat_sdl_gl_active = 0;
}
// restore back to initial resolution
// resolves black screen issue on R-Pi
if (strcmp(vid_drv_name, "x11") != 0)
SDL_SetVideoMode(fs_w, fs_h, 16, SDL_SWSURFACE);
SDL_Quit();
}
void plat_sdl_overlay_clear(void)
{
int pixels = plat_sdl_overlay->w * plat_sdl_overlay->h;
int *dst = (int *)plat_sdl_overlay->pixels[0];
int v = 0x10801080;
for (; pixels > 0; dst += 4, pixels -= 2 * 4)
dst[0] = dst[1] = dst[2] = dst[3] = v;
for (; pixels > 0; dst++, pixels -= 2)
*dst = v;
}
// vim:shiftwidth=2:expandtab