10 #include <linux/matroxfb.h>
12 #include "../common/emu.h"
15 #define FBDEV_MAX_BUFFERS 3
17 static int fbdev = -1;
18 static void *fbdev_mem = MAP_FAILED;
19 static int fbdev_mem_size;
20 static struct fb_var_screeninfo fbvar_old;
21 static struct fb_var_screeninfo fbvar_new;
22 static int fbdev_buffer_write;
24 void *fbdev_buffers[FBDEV_MAX_BUFFERS];
25 int fbdev_buffer_count;
27 void plat_video_flip(void)
31 if (fbdev_buffer_count < 2)
34 draw_buf = fbdev_buffer_write;
36 if (fbdev_buffer_write >= fbdev_buffer_count)
37 fbdev_buffer_write = 0;
39 fbvar_new.yoffset = fbvar_old.yres * draw_buf;
40 g_screen_ptr = fbdev_buffers[fbdev_buffer_write];
42 ioctl(fbdev, FBIOPAN_DISPLAY, &fbvar_new);
45 void plat_video_wait_vsync(void)
48 ioctl(fbdev, FBIO_WAITFORVSYNC, &arg);
51 int vout_fbdev_init(int *w, int *h)
53 static const char *fbdev_name = "/dev/fb0";
56 fbdev = open(fbdev_name, O_RDWR);
58 fprintf(stderr, "%s: ", fbdev_name);
63 ret = ioctl(fbdev, FBIOGET_VSCREENINFO, &fbvar_old);
65 perror("FBIOGET_VSCREENINFO ioctl");
69 fbvar_new = fbvar_old;
70 printf("%s: %ix%i@%d\n", fbdev_name, fbvar_old.xres, fbvar_old.yres, fbvar_old.bits_per_pixel);
73 fbdev_buffer_count = FBDEV_MAX_BUFFERS; // be optimistic
75 if (fbvar_new.bits_per_pixel != 16) {
76 printf(" switching to 16bpp\n");
77 fbvar_new.bits_per_pixel = 16;
78 ret = ioctl(fbdev, FBIOPUT_VSCREENINFO, &fbvar_new);
80 perror("FBIOPUT_VSCREENINFO ioctl");
85 if (fbvar_new.yres_virtual < fbvar_old.yres * fbdev_buffer_count) {
86 fbvar_new.yres_virtual = fbvar_old.yres * fbdev_buffer_count;
87 ret = ioctl(fbdev, FBIOPUT_VSCREENINFO, &fbvar_new);
89 fbdev_buffer_count = 1;
90 fprintf(stderr, "Warning: failed to increase virtual resolution, "
91 "doublebuffering disabled\n");
95 fbdev_mem_size = *w * *h * 2 * fbdev_buffer_count;
96 fbdev_mem = mmap(0, fbdev_mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev, 0);
97 if (fbdev_mem == MAP_FAILED && fbdev_buffer_count > 1) {
98 fbdev_mem_size = *w * *h * 2;
99 fbdev_buffer_count = 1;
100 fprintf(stderr, "Warning: can't map %d bytes, doublebuffering disabled\n", fbdev_mem_size);
101 fbdev_mem = mmap(0, fbdev_mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev, 0);
103 if (fbdev_mem == MAP_FAILED) {
104 perror("mmap framebuffer");
107 memset(fbdev_mem, 0, fbdev_mem_size);
108 for (i = 0; i < fbdev_buffer_count; i++)
109 fbdev_buffers[i] = (char *)fbdev_mem + i * *w * *h * 2;
110 g_screen_ptr = fbdev_buffers[0];
114 ret = ioctl(fbdev, FBIO_WAITFORVSYNC, &ret);
116 fprintf(stderr, "Warning: vsync doesn't seem to be supported\n");
118 if (fbdev_buffer_count > 1) {
119 fbdev_buffer_write = 0;
120 fbvar_new.yoffset = fbvar_old.yres * (fbdev_buffer_count - 1);
121 ret = ioctl(fbdev, FBIOPAN_DISPLAY, &fbvar_new);
123 fbdev_buffer_count = 1;
124 fprintf(stderr, "Warning: can't pan display, doublebuffering disabled\n");
128 printf("fbdev initialized.\n");
136 void vout_fbdev_finish(void)
138 ioctl(fbdev, FBIOPUT_VSCREENINFO, &fbvar_old);
139 if (fbdev_mem != MAP_FAILED)
140 munmap(fbdev_mem, fbdev_mem_size);
152 vout_fbdev_init(&w, &h);
155 memset(g_screen_ptr, 0xff, fbdev_mem_size / 2);
156 plat_video_wait_vsync();
158 memset(g_screen_ptr, 0x00, fbdev_mem_size / 2);
160 // plat_video_wait_vsync();