2 * (C) GraÅžvydas "notaz" Ignotas, 2009-2010
4 * This work is licensed under the terms of any of these licenses
6 * - GNU GPL, version 2 or later.
7 * - GNU LGPL, version 2.1 or later.
8 * See the COPYING file in the top-level directory.
14 #include <sys/types.h>
17 #include <sys/ioctl.h>
21 #include <linux/matroxfb.h>
29 struct fb_var_screeninfo fbvar_old;
30 struct fb_var_screeninfo fbvar_new;
34 int top_border, bottom_border;
37 void *vout_fbdev_flip(struct vout_fbdev *fbdev)
41 if (fbdev->buffer_count < 2)
44 draw_buf = fbdev->buffer_write;
45 fbdev->buffer_write++;
46 if (fbdev->buffer_write >= fbdev->buffer_count)
47 fbdev->buffer_write = 0;
49 fbdev->fbvar_new.yoffset =
50 (fbdev->top_border + fbdev->fbvar_new.yres + fbdev->bottom_border) * draw_buf +
53 ioctl(fbdev->fd, FBIOPAN_DISPLAY, &fbdev->fbvar_new);
55 return (char *)fbdev->mem + fbdev->fb_size * fbdev->buffer_write;
58 void vout_fbdev_wait_vsync(struct vout_fbdev *fbdev)
61 ioctl(fbdev->fd, FBIO_WAITFORVSYNC, &arg);
64 int vout_fbdev_resize(struct vout_fbdev *fbdev, int w, int h, int bpp,
65 int left_border, int right_border, int top_border, int bottom_border, int buffer_cnt)
67 int w_total = left_border + w + right_border;
68 int h_total = top_border + h + bottom_border;
72 // unblank to be sure the mode is really accepted
73 ioctl(fbdev->fd, FBIOBLANK, FB_BLANK_UNBLANK);
75 if (fbdev->fbvar_new.bits_per_pixel != bpp ||
76 w != fbdev->fbvar_new.xres ||
77 h != fbdev->fbvar_new.yres ||
78 w_total != fbdev->fbvar_new.xres_virtual ||
79 h_total > fbdev->fbvar_new.yres_virtual ||
80 left_border != fbdev->fbvar_new.xoffset) {
81 fbdev->fbvar_new.xres = w;
82 fbdev->fbvar_new.yres = h;
83 fbdev->fbvar_new.xres_virtual = w_total;
84 fbdev->fbvar_new.yres_virtual = h_total;
85 fbdev->fbvar_new.xoffset = left_border;
86 fbdev->fbvar_new.bits_per_pixel = bpp;
87 printf(" switching to %dx%d@%d\n", w, h, bpp);
88 ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new);
90 perror("FBIOPUT_VSCREENINFO ioctl");
95 fbdev->buffer_count = buffer_cnt;
97 if (fbdev->fbvar_new.yres_virtual < h_total * fbdev->buffer_count) {
98 fbdev->fbvar_new.yres_virtual = h_total * fbdev->buffer_count;
99 ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new);
101 fbdev->buffer_count = 1;
102 fprintf(stderr, "Warning: failed to increase virtual resolution, "
103 "doublebuffering disabled\n");
107 fbdev->fb_size = w_total * h_total * bpp / 8;
108 fbdev->top_border = top_border;
109 fbdev->bottom_border = bottom_border;
111 mem_size = fbdev->fb_size * fbdev->buffer_count;
112 if (fbdev->mem_size >= mem_size)
115 if (fbdev->mem != NULL)
116 munmap(fbdev->mem, fbdev->mem_size);
118 fbdev->mem = mmap(0, mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0);
119 if (fbdev->mem == MAP_FAILED && fbdev->buffer_count > 1) {
120 fprintf(stderr, "Warning: can't map %zd bytes, doublebuffering disabled\n", fbdev->mem_size);
121 fbdev->buffer_count = 1;
122 mem_size = fbdev->fb_size;
123 fbdev->mem = mmap(0, mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0);
125 if (fbdev->mem == MAP_FAILED) {
128 perror("mmap framebuffer");
132 fbdev->mem_size = mem_size;
136 void vout_fbdev_clear(struct vout_fbdev *fbdev)
138 memset(fbdev->mem, 0, fbdev->mem_size);
141 void vout_fbdev_clear_lines(struct vout_fbdev *fbdev, int y, int count)
143 int stride = fbdev->fbvar_new.xres_virtual * fbdev->fbvar_new.bits_per_pixel / 8;
146 if (y + count > fbdev->top_border + fbdev->fbvar_new.yres)
147 count = fbdev->top_border + fbdev->fbvar_new.yres - y;
149 if (y >= 0 && count > 0)
150 for (i = 0; i < fbdev->buffer_count; i++)
151 memset((char *)fbdev->mem + fbdev->fb_size * i + y * stride, 0, stride * count);
154 int vout_fbdev_get_fd(struct vout_fbdev *fbdev)
159 struct vout_fbdev *vout_fbdev_init(const char *fbdev_name, int *w, int *h, int bpp, int buffer_cnt)
161 struct vout_fbdev *fbdev;
165 fbdev = calloc(1, sizeof(*fbdev));
169 fbdev->fd = open(fbdev_name, O_RDWR);
170 if (fbdev->fd == -1) {
171 fprintf(stderr, "%s: ", fbdev_name);
176 ret = ioctl(fbdev->fd, FBIOGET_VSCREENINFO, &fbdev->fbvar_old);
178 perror("FBIOGET_VSCREENINFO ioctl");
182 fbdev->fbvar_new = fbdev->fbvar_old;
184 req_w = fbdev->fbvar_new.xres;
187 req_h = fbdev->fbvar_new.yres;
191 ret = vout_fbdev_resize(fbdev, req_w, req_h, bpp, 0, 0, 0, 0, buffer_cnt);
195 printf("%s: %ix%i@%d\n", fbdev_name, fbdev->fbvar_new.xres, fbdev->fbvar_new.yres,
196 fbdev->fbvar_new.bits_per_pixel);
197 *w = fbdev->fbvar_new.xres;
198 *h = fbdev->fbvar_new.yres;
200 memset(fbdev->mem, 0, fbdev->mem_size);
204 ret = ioctl(fbdev->fd, FBIO_WAITFORVSYNC, &ret);
206 fprintf(stderr, "Warning: vsync doesn't seem to be supported\n");
208 if (fbdev->buffer_count > 1) {
209 fbdev->buffer_write = 0;
210 fbdev->fbvar_new.yoffset = fbdev->fbvar_new.yres * (fbdev->buffer_count - 1);
211 ret = ioctl(fbdev->fd, FBIOPAN_DISPLAY, &fbdev->fbvar_new);
213 fbdev->buffer_count = 1;
214 fprintf(stderr, "Warning: can't pan display, doublebuffering disabled\n");
218 printf("fbdev initialized.\n");
228 void vout_fbdev_finish(struct vout_fbdev *fbdev)
230 ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_old);
231 if (fbdev->mem != MAP_FAILED)
232 munmap(fbdev->mem, fbdev->mem_size);