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];
43 void plat_video_wait_vsync(void)
46 ioctl(fbdev, FBIO_WAITFORVSYNC, &arg);
49 int vout_fbdev_init(int *w, int *h)
51 static const char *fbdev_name = "/dev/fb0";
54 fbdev = open(fbdev_name, O_RDWR);
56 fprintf(stderr, "%s: ", fbdev_name);
61 ret = ioctl(fbdev, FBIOGET_VSCREENINFO, &fbvar_old);
63 perror("FBIOGET_VSCREENINFO ioctl");
67 fbvar_new = fbvar_old;
68 printf("%s: %ix%i@%d\n", fbdev_name, fbvar_old.xres, fbvar_old.yres, fbvar_old.bits_per_pixel);
71 fbdev_buffer_count = FBDEV_MAX_BUFFERS; // be optimistic
73 if (fbvar_new.bits_per_pixel != 16) {
74 printf(" switching to 16bpp\n");
75 fbvar_new.bits_per_pixel = 16;
76 ret = ioctl(fbdev, FBIOPUT_VSCREENINFO, &fbvar_new);
78 perror("FBIOPUT_VSCREENINFO ioctl");
83 if (fbvar_new.yres_virtual < fbvar_old.yres * fbdev_buffer_count) {
84 fbvar_new.yres_virtual = fbvar_old.yres * fbdev_buffer_count;
85 ret = ioctl(fbdev, FBIOPUT_VSCREENINFO, &fbvar_new);
87 fbdev_buffer_count = 1;
88 fprintf(stderr, "Warning: failed to increase virtual resolution, "
89 "doublebuffering disabled\n");
93 fbdev_mem_size = *w * *h * 2 * fbdev_buffer_count;
94 fbdev_mem = mmap(0, fbdev_mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev, 0);
95 if (fbdev_mem == MAP_FAILED && fbdev_buffer_count > 1) {
96 fbdev_mem_size = *w * *h * 2;
97 fbdev_buffer_count = 1;
98 fprintf(stderr, "Warning: can't map %d bytes, doublebuffering disabled\n", fbdev_mem_size);
99 fbdev_mem = mmap(0, fbdev_mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev, 0);
101 if (fbdev_mem == MAP_FAILED) {
102 perror("mmap framebuffer");
105 memset(fbdev_mem, 0, fbdev_mem_size);
106 for (i = 0; i < fbdev_buffer_count; i++)
107 fbdev_buffers[i] = (char *)fbdev_mem + i * *w * *h * 2;
108 g_screen_ptr = fbdev_buffers[0];
112 ret = ioctl(fbdev, FBIO_WAITFORVSYNC, &ret);
114 fprintf(stderr, "Warning: vsync doesn't seem to be supported\n");
116 if (fbdev_buffer_count > 1) {
117 fbdev_buffer_write = 0;
118 fbvar_new.yoffset = fbvar_old.yres * (fbdev_buffer_count - 1);
119 ret = ioctl(fbdev, FBIOPAN_DISPLAY, &fbvar_new);
121 fbdev_buffer_count = 1;
122 fprintf(stderr, "Warning: can't pan display, doublebuffering disabled\n");
126 printf("fbdev initialized.\n");
134 void vout_fbdev_finish(void)
136 ioctl(fbdev, FBIOPUT_VSCREENINFO, &fbvar_old);
137 if (fbdev_mem != MAP_FAILED)
138 munmap(fbdev_mem, fbdev_mem_size);
150 vout_fbdev_init(&w, &h);
153 memset(g_screen_ptr, 0xff, fbdev_mem_size / 2);
154 plat_video_wait_vsync();
156 memset(g_screen_ptr, 0x00, fbdev_mem_size / 2);
158 // plat_video_wait_vsync();