2 * (C) GraÅžvydas "notaz" Ignotas, 2009-2010
4 * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
5 * See the COPYING file in the top-level directory.
11 #include <sys/types.h>
14 #include <sys/ioctl.h>
18 #include <linux/matroxfb.h>
22 #define FBDEV_MAX_BUFFERS 3
28 struct fb_var_screeninfo fbvar_old;
29 struct fb_var_screeninfo fbvar_new;
33 int top_border, bottom_border;
36 void *vout_fbdev_flip(struct vout_fbdev *fbdev)
40 if (fbdev->buffer_count < 2)
43 draw_buf = fbdev->buffer_write;
44 fbdev->buffer_write++;
45 if (fbdev->buffer_write >= fbdev->buffer_count)
46 fbdev->buffer_write = 0;
48 fbdev->fbvar_new.yoffset =
49 (fbdev->top_border + fbdev->fbvar_new.yres + fbdev->bottom_border) * draw_buf +
52 ioctl(fbdev->fd, FBIOPAN_DISPLAY, &fbdev->fbvar_new);
54 return (char *)fbdev->mem + fbdev->fb_size * fbdev->buffer_write;
57 void vout_fbdev_wait_vsync(struct vout_fbdev *fbdev)
60 ioctl(fbdev->fd, FBIO_WAITFORVSYNC, &arg);
63 int vout_fbdev_resize(struct vout_fbdev *fbdev, int w, int h,
64 int left_border, int right_border, int top_border, int bottom_border, int no_dblbuf)
66 int w_total = left_border + w + right_border;
67 int h_total = top_border + h + bottom_border;
71 // unblank to be sure the mode is really accepted
72 ioctl(fbdev->fd, FBIOBLANK, FB_BLANK_UNBLANK);
74 if (fbdev->fbvar_new.bits_per_pixel != 16 ||
75 w != fbdev->fbvar_new.xres ||
76 h != fbdev->fbvar_new.yres ||
77 w_total != fbdev->fbvar_new.xres_virtual ||
78 h_total > fbdev->fbvar_new.yres_virtual ||
79 left_border != fbdev->fbvar_new.xoffset) {
80 fbdev->fbvar_new.xres = w;
81 fbdev->fbvar_new.yres = h;
82 fbdev->fbvar_new.xres_virtual = w_total;
83 fbdev->fbvar_new.yres_virtual = h_total;
84 fbdev->fbvar_new.xoffset = left_border;
85 fbdev->fbvar_new.bits_per_pixel = 16;
86 printf(" switching to %dx%d@16\n", w, h);
87 ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new);
89 perror("FBIOPUT_VSCREENINFO ioctl");
94 fbdev->buffer_count = FBDEV_MAX_BUFFERS; // be optimistic
96 fbdev->buffer_count = 1;
98 if (fbdev->fbvar_new.yres_virtual < h_total * fbdev->buffer_count) {
99 fbdev->fbvar_new.yres_virtual = h_total * fbdev->buffer_count;
100 ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new);
102 fbdev->buffer_count = 1;
103 fprintf(stderr, "Warning: failed to increase virtual resolution, "
104 "doublebuffering disabled\n");
108 fbdev->fb_size = w_total * h_total * 2;
109 fbdev->top_border = top_border;
110 fbdev->bottom_border = bottom_border;
112 mem_size = fbdev->fb_size * fbdev->buffer_count;
113 if (fbdev->mem_size >= mem_size)
116 if (fbdev->mem != NULL)
117 munmap(fbdev->mem, fbdev->mem_size);
119 fbdev->mem = mmap(0, mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0);
120 if (fbdev->mem == MAP_FAILED && fbdev->buffer_count > 1) {
121 fprintf(stderr, "Warning: can't map %zd bytes, doublebuffering disabled\n", fbdev->mem_size);
122 fbdev->buffer_count = 1;
123 mem_size = fbdev->fb_size;
124 fbdev->mem = mmap(0, mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0);
126 if (fbdev->mem == MAP_FAILED) {
129 perror("mmap framebuffer");
133 fbdev->mem_size = mem_size;
137 void vout_fbdev_clear(struct vout_fbdev *fbdev)
139 memset(fbdev->mem, 0, fbdev->mem_size);
142 void vout_fbdev_clear_lines(struct vout_fbdev *fbdev, int y, int count)
144 int stride = fbdev->fbvar_new.xres_virtual * fbdev->fbvar_new.bits_per_pixel / 8;
147 if (y + count > fbdev->top_border + fbdev->fbvar_new.yres)
148 count = fbdev->top_border + fbdev->fbvar_new.yres - y;
150 if (y >= 0 && count > 0)
151 for (i = 0; i < fbdev->buffer_count; i++)
152 memset((char *)fbdev->mem + fbdev->fb_size * i + y * stride, 0, stride * count);
155 int vout_fbdev_get_fd(struct vout_fbdev *fbdev)
160 struct vout_fbdev *vout_fbdev_init(const char *fbdev_name, int *w, int *h, int no_dblbuf)
162 struct vout_fbdev *fbdev;
166 fbdev = calloc(1, sizeof(*fbdev));
170 fbdev->fd = open(fbdev_name, O_RDWR);
171 if (fbdev->fd == -1) {
172 fprintf(stderr, "%s: ", fbdev_name);
177 ret = ioctl(fbdev->fd, FBIOGET_VSCREENINFO, &fbdev->fbvar_old);
179 perror("FBIOGET_VSCREENINFO ioctl");
183 fbdev->fbvar_new = fbdev->fbvar_old;
185 req_w = fbdev->fbvar_new.xres;
188 req_h = fbdev->fbvar_new.yres;
192 ret = vout_fbdev_resize(fbdev, req_w, req_h, 0, 0, 0, 0, no_dblbuf);
196 printf("%s: %ix%i@%d\n", fbdev_name, fbdev->fbvar_new.xres, fbdev->fbvar_new.yres,
197 fbdev->fbvar_new.bits_per_pixel);
198 *w = fbdev->fbvar_new.xres;
199 *h = fbdev->fbvar_new.yres;
201 memset(fbdev->mem, 0, fbdev->mem_size);
205 ret = ioctl(fbdev->fd, FBIO_WAITFORVSYNC, &ret);
207 fprintf(stderr, "Warning: vsync doesn't seem to be supported\n");
209 if (fbdev->buffer_count > 1) {
210 fbdev->buffer_write = 0;
211 fbdev->fbvar_new.yoffset = fbdev->fbvar_new.yres * (fbdev->buffer_count - 1);
212 ret = ioctl(fbdev->fd, FBIOPAN_DISPLAY, &fbdev->fbvar_new);
214 fbdev->buffer_count = 1;
215 fprintf(stderr, "Warning: can't pan display, doublebuffering disabled\n");
219 printf("fbdev initialized.\n");
229 void vout_fbdev_finish(struct vout_fbdev *fbdev)
231 ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_old);
232 if (fbdev->mem != MAP_FAILED)
233 munmap(fbdev->mem, fbdev->mem_size);