392b07b2 |
1 | /* |
2 | * (C) GraÅžvydas "notaz" Ignotas, 2009-2010 |
3 | * |
957a9eac |
4 | * This work is licensed under the terms of any of these licenses |
5 | * (at your option): |
6 | * - GNU GPL, version 2 or later. |
7 | * - GNU LGPL, version 2.1 or later. |
f89d8471 |
8 | * - MAME license. |
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9 | * See the COPYING file in the top-level directory. |
10 | */ |
11 | |
b188c2b6 |
12 | #include <stdio.h> |
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13 | #include <stdlib.h> |
b188c2b6 |
14 | #include <string.h> |
15 | #include <sys/types.h> |
16 | #include <sys/stat.h> |
17 | #include <fcntl.h> |
18 | #include <sys/ioctl.h> |
19 | #include <sys/mman.h> |
20 | #include <unistd.h> |
21 | #include <linux/fb.h> |
22 | #include <linux/matroxfb.h> |
23 | |
b188c2b6 |
24 | #include "fbdev.h" |
25 | |
323db729 |
26 | #define PFX "fbdev: " |
27 | |
1f8b4b84 |
28 | struct vout_fbdev { |
29 | int fd; |
30 | void *mem; |
31 | size_t mem_size; |
32 | struct fb_var_screeninfo fbvar_old; |
33 | struct fb_var_screeninfo fbvar_new; |
34 | int buffer_write; |
b6b7d1b1 |
35 | int fb_size; |
1f8b4b84 |
36 | int buffer_count; |
b6b7d1b1 |
37 | int top_border, bottom_border; |
323db729 |
38 | void *mem_saved; |
39 | size_t mem_saved_size; |
1f8b4b84 |
40 | }; |
41 | |
42 | void *vout_fbdev_flip(struct vout_fbdev *fbdev) |
b188c2b6 |
43 | { |
44 | int draw_buf; |
45 | |
1f8b4b84 |
46 | if (fbdev->buffer_count < 2) |
47 | return fbdev->mem; |
b188c2b6 |
48 | |
1f8b4b84 |
49 | draw_buf = fbdev->buffer_write; |
50 | fbdev->buffer_write++; |
51 | if (fbdev->buffer_write >= fbdev->buffer_count) |
52 | fbdev->buffer_write = 0; |
b188c2b6 |
53 | |
b6b7d1b1 |
54 | fbdev->fbvar_new.yoffset = |
55 | (fbdev->top_border + fbdev->fbvar_new.yres + fbdev->bottom_border) * draw_buf + |
56 | fbdev->top_border; |
d5d59eb4 |
57 | |
1f8b4b84 |
58 | ioctl(fbdev->fd, FBIOPAN_DISPLAY, &fbdev->fbvar_new); |
59 | |
b6b7d1b1 |
60 | return (char *)fbdev->mem + fbdev->fb_size * fbdev->buffer_write; |
b188c2b6 |
61 | } |
62 | |
1f8b4b84 |
63 | void vout_fbdev_wait_vsync(struct vout_fbdev *fbdev) |
b188c2b6 |
64 | { |
65 | int arg = 0; |
1f8b4b84 |
66 | ioctl(fbdev->fd, FBIO_WAITFORVSYNC, &arg); |
b188c2b6 |
67 | } |
68 | |
87a68cdb |
69 | /* it is recommended to call vout_fbdev_clear() before this */ |
70 | void *vout_fbdev_resize(struct vout_fbdev *fbdev, int w, int h, int bpp, |
4332e4bc |
71 | int left_border, int right_border, int top_border, int bottom_border, int buffer_cnt) |
b6b7d1b1 |
72 | { |
73 | int w_total = left_border + w + right_border; |
74 | int h_total = top_border + h + bottom_border; |
75 | size_t mem_size; |
76 | int ret; |
77 | |
78 | // unblank to be sure the mode is really accepted |
79 | ioctl(fbdev->fd, FBIOBLANK, FB_BLANK_UNBLANK); |
80 | |
4332e4bc |
81 | if (fbdev->fbvar_new.bits_per_pixel != bpp || |
9c2179d3 |
82 | fbdev->fbvar_new.xres != w || |
83 | fbdev->fbvar_new.yres != h || |
84 | fbdev->fbvar_new.xres_virtual != w_total|| |
85 | fbdev->fbvar_new.yres_virtual < h_total || |
86 | fbdev->fbvar_new.xoffset != left_border || |
87 | fbdev->buffer_count != buffer_cnt) |
88 | { |
89 | if (fbdev->fbvar_new.bits_per_pixel != bpp || |
90 | w != fbdev->fbvar_new.xres || h != fbdev->fbvar_new.yres) |
323db729 |
91 | printf(PFX "switching to %dx%d@%d\n", w, h, bpp); |
9c2179d3 |
92 | |
b6b7d1b1 |
93 | fbdev->fbvar_new.xres = w; |
94 | fbdev->fbvar_new.yres = h; |
95 | fbdev->fbvar_new.xres_virtual = w_total; |
9c2179d3 |
96 | fbdev->fbvar_new.yres_virtual = h_total * buffer_cnt; |
b6b7d1b1 |
97 | fbdev->fbvar_new.xoffset = left_border; |
87a68cdb |
98 | fbdev->fbvar_new.yoffset = top_border; |
4332e4bc |
99 | fbdev->fbvar_new.bits_per_pixel = bpp; |
f0c1692d |
100 | fbdev->fbvar_new.nonstd = 0; // can set YUV here on omapfb |
9c2179d3 |
101 | fbdev->buffer_count = buffer_cnt; |
f168d031 |
102 | fbdev->buffer_write = buffer_cnt > 1 ? 1 : 0; |
87a68cdb |
103 | |
104 | // seems to help a bit to avoid glitches |
105 | vout_fbdev_wait_vsync(fbdev); |
106 | |
b6b7d1b1 |
107 | ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new); |
108 | if (ret == -1) { |
9c2179d3 |
109 | // retry with no multibuffering |
110 | fbdev->fbvar_new.yres_virtual = h_total; |
111 | ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new); |
112 | if (ret == -1) { |
323db729 |
113 | perror(PFX "FBIOPUT_VSCREENINFO ioctl"); |
9c2179d3 |
114 | return NULL; |
115 | } |
b6b7d1b1 |
116 | fbdev->buffer_count = 1; |
87a68cdb |
117 | fbdev->buffer_write = 0; |
323db729 |
118 | fprintf(stderr, PFX "Warning: failed to increase virtual resolution, " |
9c2179d3 |
119 | "multibuffering disabled\n"); |
b6b7d1b1 |
120 | } |
9c2179d3 |
121 | |
b6b7d1b1 |
122 | } |
123 | |
4332e4bc |
124 | fbdev->fb_size = w_total * h_total * bpp / 8; |
b6b7d1b1 |
125 | fbdev->top_border = top_border; |
126 | fbdev->bottom_border = bottom_border; |
127 | |
128 | mem_size = fbdev->fb_size * fbdev->buffer_count; |
129 | if (fbdev->mem_size >= mem_size) |
87a68cdb |
130 | goto out; |
b6b7d1b1 |
131 | |
132 | if (fbdev->mem != NULL) |
133 | munmap(fbdev->mem, fbdev->mem_size); |
134 | |
135 | fbdev->mem = mmap(0, mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0); |
136 | if (fbdev->mem == MAP_FAILED && fbdev->buffer_count > 1) { |
323db729 |
137 | fprintf(stderr, PFX "Warning: can't map %zd bytes, doublebuffering disabled\n", mem_size); |
b6b7d1b1 |
138 | fbdev->buffer_count = 1; |
9c2179d3 |
139 | fbdev->buffer_write = 0; |
b6b7d1b1 |
140 | mem_size = fbdev->fb_size; |
141 | fbdev->mem = mmap(0, mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0); |
142 | } |
143 | if (fbdev->mem == MAP_FAILED) { |
144 | fbdev->mem = NULL; |
145 | fbdev->mem_size = 0; |
323db729 |
146 | perror(PFX "mmap framebuffer"); |
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147 | return NULL; |
b6b7d1b1 |
148 | } |
149 | |
150 | fbdev->mem_size = mem_size; |
87a68cdb |
151 | |
152 | out: |
153 | return (char *)fbdev->mem + fbdev->fb_size * fbdev->buffer_write; |
b6b7d1b1 |
154 | } |
155 | |
1f8b4b84 |
156 | void vout_fbdev_clear(struct vout_fbdev *fbdev) |
b188c2b6 |
157 | { |
fdfcdca9 |
158 | if (fbdev->mem) |
159 | memset(fbdev->mem, 0, fbdev->fb_size * fbdev->buffer_count); |
1f8b4b84 |
160 | } |
161 | |
b6b7d1b1 |
162 | void vout_fbdev_clear_lines(struct vout_fbdev *fbdev, int y, int count) |
163 | { |
6bc3d94d |
164 | int stride = fbdev->fbvar_new.xres_virtual * fbdev->fbvar_new.bits_per_pixel / 8; |
b6b7d1b1 |
165 | int i; |
166 | |
6bc3d94d |
167 | if (y + count > fbdev->top_border + fbdev->fbvar_new.yres) |
168 | count = fbdev->top_border + fbdev->fbvar_new.yres - y; |
b6b7d1b1 |
169 | |
170 | if (y >= 0 && count > 0) |
171 | for (i = 0; i < fbdev->buffer_count; i++) |
172 | memset((char *)fbdev->mem + fbdev->fb_size * i + y * stride, 0, stride * count); |
173 | } |
174 | |
175 | int vout_fbdev_get_fd(struct vout_fbdev *fbdev) |
176 | { |
177 | return fbdev->fd; |
178 | } |
179 | |
4332e4bc |
180 | struct vout_fbdev *vout_fbdev_init(const char *fbdev_name, int *w, int *h, int bpp, int buffer_cnt) |
1f8b4b84 |
181 | { |
182 | struct vout_fbdev *fbdev; |
b6b7d1b1 |
183 | int req_w, req_h; |
87a68cdb |
184 | void *pret; |
b6b7d1b1 |
185 | int ret; |
b188c2b6 |
186 | |
1f8b4b84 |
187 | fbdev = calloc(1, sizeof(*fbdev)); |
188 | if (fbdev == NULL) |
189 | return NULL; |
190 | |
191 | fbdev->fd = open(fbdev_name, O_RDWR); |
192 | if (fbdev->fd == -1) { |
323db729 |
193 | fprintf(stderr, PFX "%s: ", fbdev_name); |
b188c2b6 |
194 | perror("open"); |
1f8b4b84 |
195 | goto fail_open; |
b188c2b6 |
196 | } |
197 | |
1f8b4b84 |
198 | ret = ioctl(fbdev->fd, FBIOGET_VSCREENINFO, &fbdev->fbvar_old); |
b188c2b6 |
199 | if (ret == -1) { |
323db729 |
200 | perror(PFX "FBIOGET_VSCREENINFO ioctl"); |
b188c2b6 |
201 | goto fail; |
202 | } |
203 | |
1f8b4b84 |
204 | fbdev->fbvar_new = fbdev->fbvar_old; |
b188c2b6 |
205 | |
b6b7d1b1 |
206 | req_w = fbdev->fbvar_new.xres; |
207 | if (*w != 0) |
208 | req_w = *w; |
209 | req_h = fbdev->fbvar_new.yres; |
210 | if (*h != 0) |
211 | req_h = *h; |
b188c2b6 |
212 | |
87a68cdb |
213 | pret = vout_fbdev_resize(fbdev, req_w, req_h, bpp, 0, 0, 0, 0, buffer_cnt); |
214 | if (pret == NULL) |
b188c2b6 |
215 | goto fail; |
b6b7d1b1 |
216 | |
323db729 |
217 | printf(PFX "%s: %ix%i@%d\n", fbdev_name, fbdev->fbvar_new.xres, |
218 | fbdev->fbvar_new.yres, fbdev->fbvar_new.bits_per_pixel); |
b6b7d1b1 |
219 | *w = fbdev->fbvar_new.xres; |
220 | *h = fbdev->fbvar_new.yres; |
221 | |
1f8b4b84 |
222 | memset(fbdev->mem, 0, fbdev->mem_size); |
b188c2b6 |
223 | |
224 | // some checks |
225 | ret = 0; |
1f8b4b84 |
226 | ret = ioctl(fbdev->fd, FBIO_WAITFORVSYNC, &ret); |
b188c2b6 |
227 | if (ret != 0) |
323db729 |
228 | fprintf(stderr, PFX "Warning: vsync doesn't seem to be supported\n"); |
b188c2b6 |
229 | |
1f8b4b84 |
230 | if (fbdev->buffer_count > 1) { |
231 | fbdev->buffer_write = 0; |
b6b7d1b1 |
232 | fbdev->fbvar_new.yoffset = fbdev->fbvar_new.yres * (fbdev->buffer_count - 1); |
1f8b4b84 |
233 | ret = ioctl(fbdev->fd, FBIOPAN_DISPLAY, &fbdev->fbvar_new); |
b188c2b6 |
234 | if (ret != 0) { |
1f8b4b84 |
235 | fbdev->buffer_count = 1; |
323db729 |
236 | fprintf(stderr, PFX "Warning: can't pan display, doublebuffering disabled\n"); |
b188c2b6 |
237 | } |
238 | } |
239 | |
240 | printf("fbdev initialized.\n"); |
1f8b4b84 |
241 | return fbdev; |
b188c2b6 |
242 | |
243 | fail: |
1f8b4b84 |
244 | close(fbdev->fd); |
245 | fail_open: |
246 | free(fbdev); |
247 | return NULL; |
b188c2b6 |
248 | } |
249 | |
323db729 |
250 | static void vout_fbdev_release(struct vout_fbdev *fbdev) |
b188c2b6 |
251 | { |
1f8b4b84 |
252 | ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_old); |
253 | if (fbdev->mem != MAP_FAILED) |
254 | munmap(fbdev->mem, fbdev->mem_size); |
323db729 |
255 | fbdev->mem = NULL; |
256 | } |
257 | |
258 | int vout_fbdev_save(struct vout_fbdev *fbdev) |
259 | { |
260 | void *tmp; |
261 | |
262 | if (fbdev == NULL || fbdev->mem == NULL || fbdev->mem == MAP_FAILED) { |
263 | fprintf(stderr, PFX "bad args for save\n"); |
264 | return -1; |
265 | } |
266 | |
267 | if (fbdev->mem_saved_size < fbdev->mem_size) { |
268 | tmp = realloc(fbdev->mem_saved, fbdev->mem_size); |
269 | if (tmp == NULL) |
270 | return -1; |
271 | fbdev->mem_saved = tmp; |
272 | } |
273 | memcpy(fbdev->mem_saved, fbdev->mem, fbdev->mem_size); |
274 | fbdev->mem_saved_size = fbdev->mem_size; |
275 | |
276 | vout_fbdev_release(fbdev); |
277 | return 0; |
278 | } |
279 | |
280 | int vout_fbdev_restore(struct vout_fbdev *fbdev) |
281 | { |
282 | int ret; |
283 | |
284 | if (fbdev == NULL || fbdev->mem != NULL) { |
285 | fprintf(stderr, PFX "bad args/state for restore\n"); |
286 | return -1; |
287 | } |
288 | |
289 | fbdev->mem = mmap(0, fbdev->mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0); |
290 | if (fbdev->mem == MAP_FAILED) { |
291 | perror(PFX "restore: memory restore failed"); |
292 | return -1; |
293 | } |
294 | memcpy(fbdev->mem, fbdev->mem_saved, fbdev->mem_size); |
295 | |
296 | ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new); |
297 | if (ret == -1) { |
298 | perror(PFX "restore: FBIOPUT_VSCREENINFO"); |
299 | return -1; |
300 | } |
301 | |
302 | return 0; |
303 | } |
304 | |
305 | void vout_fbdev_finish(struct vout_fbdev *fbdev) |
306 | { |
307 | vout_fbdev_release(fbdev); |
1f8b4b84 |
308 | if (fbdev->fd >= 0) |
309 | close(fbdev->fd); |
1f8b4b84 |
310 | fbdev->fd = -1; |
311 | free(fbdev); |
b188c2b6 |
312 | } |
313 | |