netsurf/framebuffer/fb_frontend_linuxfb.c
Vincent Sanders 2fa78a799b Improve option handling code in frontends
Improve depth handling in the VNC frontend

svn path=/trunk/netsurf/; revision=6641
2009-02-26 18:58:03 +00:00

773 lines
24 KiB
C

/*
* Copyright 2008 Vincent Sanders <vince@simtec.co.uk>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* NetSurf is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <signal.h>
#include <sys/types.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <termios.h>
#include <errno.h>
#include <setjmp.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <dirent.h>
#include <fnmatch.h>
#include <linux/kd.h>
#include <linux/vt.h>
#include <linux/fb.h>
#include <linux/input.h>
#include "css/css.h"
#include "desktop/browser.h"
#include "desktop/gui.h"
#include "framebuffer/fb_gui.h"
#include "framebuffer/fb_plotters.h"
#include "framebuffer/fb_schedule.h"
#include "framebuffer/fb_cursor.h"
#include "framebuffer/fb_frontend.h"
#include "framebuffer/fb_options.h"
#include "framebuffer/fb_rootwindow.h"
#include "utils/log.h"
#include "utils/messages.h"
#define FB_ACTIVE 0
#define FB_REL_REQ 1
#define FB_INACTIVE 2
#define FB_ACQ_REQ 3
struct fb_fix_screeninfo fb_fix;
struct fb_var_screeninfo fb_var;
unsigned char *fb_mem;
int fb_mem_offset = 0;
int fb_switch_state = FB_ACTIVE;
static int fb,tty;
static int orig_vt_no = 0;
static struct vt_mode vt_mode;
static int kd_mode;
static struct vt_mode vt_omode;
static struct termios term;
static struct fb_var_screeninfo fb_ovar;
static unsigned short ored[256], ogreen[256], oblue[256], otransp[256];
static struct fb_cmap ocmap = { 0, 256, ored, ogreen, oblue, otransp };
typedef struct _input_dev {
struct _input_dev *next;
int fd;
} fb_input_dev;
static fb_input_dev *inputdevs = 0;
/* -------------------------------------------------------------------- */
/* devices */
struct DEVS {
const char *fb0;
const char *fbnr;
const char *ttynr;
};
struct DEVS devs_default = {
.fb0 = "/dev/fb0",
.fbnr = "/dev/fb%d",
.ttynr = "/dev/tty%d",
};
struct DEVS devs_devfs = {
.fb0 = "/dev/fb/0",
.fbnr = "/dev/fb/%d",
.ttynr = "/dev/vc/%d",
};
struct DEVS *devices;
static void dev_init(void)
{
struct stat dummy;
if (NULL != devices)
return;
if (0 == stat("/dev/.devfsd",&dummy))
devices = &devs_devfs;
else
devices = &devs_default;
}
static char *
fconcat(const char *base, const char *leaf)
{
static char buffer[PATH_MAX];
snprintf(buffer, PATH_MAX, "%s/%s", base, leaf);
return buffer;
}
/* Input device opening */
static void
fb_open_input_devices(void)
{
DIR *dir;
fb_input_dev *d;
struct dirent *de;
const char *basepath = option_fb_input_devpath ? option_fb_input_devpath : "/dev/input";
dir = opendir(basepath);
if (dir == NULL)
return;
while ((de = readdir(dir)) != NULL) {
if (fnmatch(option_fb_input_glob ? option_fb_input_glob : "event*",
de->d_name, 0) == 0) {
char *cc = fconcat(basepath, de->d_name);
int fd = open(cc, O_RDONLY | O_NONBLOCK);
if (fd >= 0) {
d = calloc(1, sizeof(fb_input_dev));
d->next = inputdevs;
inputdevs = d;
d->fd = fd;
}
}
}
closedir(dir);
}
/* -------------------------------------------------------------------- */
/* console switching */
static void
fb_switch_signal(int signal)
{
if (signal == SIGUSR1) {
/* release */
fb_switch_state = FB_REL_REQ;
}
if (signal == SIGUSR2) {
/* acquisition */
fb_switch_state = FB_ACQ_REQ;
}
}
static int
fb_switch_init(void)
{
struct sigaction act,old;
memset(&act,0,sizeof(act));
act.sa_handler = fb_switch_signal;
sigemptyset(&act.sa_mask);
sigaction(SIGUSR1,&act,&old);
sigaction(SIGUSR2,&act,&old);
if (-1 == ioctl(tty,VT_GETMODE, &vt_mode)) {
perror("ioctl VT_GETMODE");
exit(1);
}
vt_mode.mode = VT_PROCESS;
vt_mode.waitv = 0;
vt_mode.relsig = SIGUSR1;
vt_mode.acqsig = SIGUSR2;
if (-1 == ioctl(tty,VT_SETMODE, &vt_mode)) {
perror("ioctl VT_SETMODE");
exit(1);
}
return 0;
}
/* -------------------------------------------------------------------- */
/* initialisation & cleanup */
static void
fb_memset (void *addr, int c, size_t len)
{
#if 1 /* defined(__powerpc__) */
unsigned int i, *p;
i = (c & 0xff) << 8;
i |= i << 16;
len >>= 2;
for (p = addr; len--; p++)
*p = i;
#else
memset(addr, c, len);
#endif
}
static int
fb_setmode(const char *name, int bpp)
{
FILE *fp;
char line[80],label[32],value[16];
int geometry=0, timings=0;
/* load current values */
if (ioctl(fb,FBIOGET_VSCREENINFO,&fb_var) == -1) {
perror("ioctl FBIOGET_VSCREENINFO");
exit(1);
}
if (name == NULL)
return -1;
if ((fp = fopen("/etc/fb.modes","r")) == NULL)
return -1;
while (NULL != fgets(line,79,fp)) {
if (1 == sscanf(line, "mode \"%31[^\"]\"",label) &&
0 == strcmp(label,name)) {
/* fill in new values */
fb_var.sync = 0;
fb_var.vmode = 0;
while (NULL != fgets(line,79,fp) &&
NULL == strstr(line,"endmode")) {
if (5 == sscanf(line," geometry %d %d %d %d %d",
&fb_var.xres,&fb_var.yres,
&fb_var.xres_virtual,&fb_var.yres_virtual,
&fb_var.bits_per_pixel))
geometry = 1;
if (7 == sscanf(line," timings %d %d %d %d %d %d %d",
&fb_var.pixclock,
&fb_var.left_margin, &fb_var.right_margin,
&fb_var.upper_margin, &fb_var.lower_margin,
&fb_var.hsync_len, &fb_var.vsync_len))
timings = 1;
if (1 == sscanf(line, " hsync %15s",value) &&
0 == strcasecmp(value,"high"))
fb_var.sync |= FB_SYNC_HOR_HIGH_ACT;
if (1 == sscanf(line, " vsync %15s",value) &&
0 == strcasecmp(value,"high"))
fb_var.sync |= FB_SYNC_VERT_HIGH_ACT;
if (1 == sscanf(line, " csync %15s",value) &&
0 == strcasecmp(value,"high"))
fb_var.sync |= FB_SYNC_COMP_HIGH_ACT;
if (1 == sscanf(line, " extsync %15s",value) &&
0 == strcasecmp(value,"true"))
fb_var.sync |= FB_SYNC_EXT;
if (1 == sscanf(line, " laced %15s",value) &&
0 == strcasecmp(value,"true"))
fb_var.vmode |= FB_VMODE_INTERLACED;
if (1 == sscanf(line, " double %15s",value) &&
0 == strcasecmp(value,"true"))
fb_var.vmode |= FB_VMODE_DOUBLE;
}
/* ok ? */
if (!geometry || !timings)
return -1;
if (bpp != 0)
fb_var.bits_per_pixel = bpp;
/* set */
fb_var.xoffset = 0;
fb_var.yoffset = 0;
if (-1 == ioctl(fb,FBIOPUT_VSCREENINFO,&fb_var))
perror("ioctl FBIOPUT_VSCREENINFO");
/* look what we have now ... */
if (-1 == ioctl(fb,FBIOGET_VSCREENINFO,&fb_var)) {
perror("ioctl FBIOGET_VSCREENINFO");
exit(1);
}
return 0;
}
}
return -1;
}
static void
fb_setvt(int vtno)
{
struct vt_stat vts;
char vtname[12];
if (vtno < 0) {
if (-1 == ioctl(tty,VT_OPENQRY, &vtno) || vtno == -1) {
perror("ioctl VT_OPENQRY");
exit(1);
}
}
vtno &= 0xff;
sprintf(vtname, devices->ttynr, vtno);
chown(vtname, getuid(), getgid());
if (-1 == access(vtname, R_OK | W_OK)) {
fprintf(stderr,"access %s: %s\n",vtname,strerror(errno));
exit(1);
}
/* switch (fork()) {
case 0:
break;
case -1:
perror("fork");
exit(1);
default:
exit(0);
}
close(tty);
close(0);
close(1);
close(2);
setsid();
open(vtname,O_RDWR);
dup(0);
dup(0);
*/
tty = open(vtname,O_RDWR);
if (-1 == ioctl(tty,VT_GETSTATE, &vts)) {
perror("ioctl VT_GETSTATE");
exit(1);
}
orig_vt_no = vts.v_active;
if (-1 == ioctl(tty,VT_ACTIVATE, vtno)) {
perror("ioctl VT_ACTIVATE");
exit(1);
}
if (-1 == ioctl(tty,VT_WAITACTIVE, vtno)) {
perror("ioctl VT_WAITACTIVE");
exit(1);
}
}
/* Hmm. radeonfb needs this. matroxfb doesn't. */
static int
fb_activate_current(int tty)
{
struct vt_stat vts;
if (-1 == ioctl(tty,VT_GETSTATE, &vts)) {
perror("ioctl VT_GETSTATE");
return -1;
}
if (-1 == ioctl(tty,VT_ACTIVATE, vts.v_active)) {
perror("ioctl VT_ACTIVATE");
return -1;
}
if (-1 == ioctl(tty,VT_WAITACTIVE, vts.v_active)) {
perror("ioctl VT_WAITACTIVE");
return -1;
}
return 0;
}
static void
fb_cleanup(void)
{
/* restore console */
if (-1 == ioctl(fb,FBIOPUT_VSCREENINFO,&fb_ovar))
perror("ioctl FBIOPUT_VSCREENINFO");
if (-1 == ioctl(fb,FBIOGET_FSCREENINFO,&fb_fix))
perror("ioctl FBIOGET_FSCREENINFO");
if (fb_ovar.bits_per_pixel == 8 ||
fb_fix.visual == FB_VISUAL_DIRECTCOLOR) {
if (-1 == ioctl(fb,FBIOPUTCMAP,&ocmap))
perror("ioctl FBIOPUTCMAP");
}
close(fb);
if (-1 == ioctl(tty,KDSETMODE, kd_mode))
perror("ioctl KDSETMODE");
if (-1 == ioctl(tty,VT_SETMODE, &vt_omode))
perror("ioctl VT_SETMODE");
if (orig_vt_no && -1 == ioctl(tty, VT_ACTIVATE, orig_vt_no))
perror("ioctl VT_ACTIVATE");
if (orig_vt_no && -1 == ioctl(tty, VT_WAITACTIVE, orig_vt_no))
perror("ioctl VT_WAITACTIVE");
tcsetattr(tty, TCSANOW, &term);
close(tty);
}
static int
framebuffer_init(const char *device, int width, int height, int refresh, int bpp, int vt)
{
char fbdev[16];
struct vt_stat vts;
long pm = ~(sysconf(_SC_PAGESIZE) - 1);
char mode[32];
snprintf(mode, 32, "%dx%d-%d", width, height, refresh);
dev_init();
tty = 0;
if (vt != 0)
fb_setvt(vt);
if (-1 == ioctl(tty,VT_GETSTATE, &vts)) {
fprintf(stderr,"ioctl VT_GETSTATE: %s (not a linux console?)\n",
strerror(errno));
exit(1);
}
if (device == NULL) {
device = getenv("FRAMEBUFFER");
if (device == NULL) {
struct fb_con2fbmap c2m;
if (-1 == (fb = open(devices->fb0,O_RDWR /* O_WRONLY */,0))) {
fprintf(stderr,"open %s: %s\n",devices->fb0,strerror(errno));
exit(1);
}
c2m.console = vts.v_active;
if (-1 == ioctl(fb, FBIOGET_CON2FBMAP, &c2m)) {
perror("ioctl FBIOGET_CON2FBMAP");
exit(1);
}
close(fb);
fprintf(stderr,"map: vt%02d => fb%d\n",
c2m.console,c2m.framebuffer);
sprintf(fbdev,devices->fbnr,c2m.framebuffer);
device = fbdev;
}
}
/* get current settings (which we have to restore) */
if (-1 == (fb = open(device,O_RDWR /* O_WRONLY */))) {
fprintf(stderr,"open %s: %s\n",device,strerror(errno));
exit(1);
}
if (-1 == ioctl(fb,FBIOGET_VSCREENINFO,&fb_ovar)) {
perror("ioctl FBIOGET_VSCREENINFO");
exit(1);
}
if (-1 == ioctl(fb,FBIOGET_FSCREENINFO,&fb_fix)) {
perror("ioctl FBIOGET_FSCREENINFO");
exit(1);
}
if (fb_ovar.bits_per_pixel == 8 ||
fb_fix.visual == FB_VISUAL_DIRECTCOLOR) {
if (-1 == ioctl(fb,FBIOGETCMAP,&ocmap)) {
perror("ioctl FBIOGETCMAP");
exit(1);
}
}
if (-1 == ioctl(tty,KDGETMODE, &kd_mode)) {
perror("ioctl KDGETMODE");
exit(1);
}
if (-1 == ioctl(tty,VT_GETMODE, &vt_omode)) {
perror("ioctl VT_GETMODE");
exit(1);
}
tcgetattr(tty, &term);
/* switch mode */
fb_setmode(mode, bpp);
/* checks & initialisation */
if (-1 == ioctl(fb,FBIOGET_FSCREENINFO,&fb_fix)) {
perror("ioctl FBIOGET_FSCREENINFO");
exit(1);
}
if (fb_fix.type != FB_TYPE_PACKED_PIXELS) {
fprintf(stderr,"can handle only packed pixel frame buffers\n");
goto err;
}
fb_mem_offset = (unsigned long)(fb_fix.smem_start) & (~pm);
fb_mem = mmap(NULL,fb_fix.smem_len+fb_mem_offset,
PROT_READ|PROT_WRITE,MAP_SHARED,fb,0);
if (-1L == (long)fb_mem) {
perror("mmap");
goto err;
}
/* move viewport to upper left corner */
if (fb_var.xoffset != 0 || fb_var.yoffset != 0) {
fb_var.xoffset = 0;
fb_var.yoffset = 0;
if (-1 == ioctl(fb,FBIOPAN_DISPLAY,&fb_var)) {
perror("ioctl FBIOPAN_DISPLAY");
goto err;
}
}
if (-1 == ioctl(tty,KDSETMODE, KD_GRAPHICS)) {
perror("ioctl KDSETMODE");
goto err;
}
fb_activate_current(tty);
/* cls */
fb_memset(fb_mem + fb_mem_offset, 0, fb_fix.smem_len);
return fb;
err:
fb_cleanup();
exit(1);
}
/* -------------------------------------------------------------------- */
/* handle fatal errors */
static jmp_buf fb_fatal_cleanup;
static void
fb_catch_exit_signal(int signal)
{
siglongjmp(fb_fatal_cleanup,signal);
}
static void
fb_catch_exit_signals(void)
{
struct sigaction act,old;
int termsig;
memset(&act,0,sizeof(act));
act.sa_handler = fb_catch_exit_signal;
sigemptyset(&act.sa_mask);
sigaction(SIGINT, &act,&old);
sigaction(SIGQUIT,&act,&old);
sigaction(SIGTERM,&act,&old);
sigaction(SIGABRT,&act,&old);
sigaction(SIGTSTP,&act,&old);
sigaction(SIGBUS, &act,&old);
sigaction(SIGILL, &act,&old);
sigaction(SIGSEGV,&act,&old);
if (0 == (termsig = sigsetjmp(fb_fatal_cleanup,0)))
return;
/* cleanup */
fb_cleanup();
fprintf(stderr,"Oops: %s\n",sys_siglist[termsig]);
exit(42);
}
framebuffer_t *fb_os_init(int argc, char** argv)
{
framebuffer_t *newfb;
int ploop;
int fb_width;
int fb_height;
int fb_refresh;
int fb_depth;
if ((option_window_width != 0) && (option_window_height != 0)) {
fb_width = option_window_width;
fb_height = option_window_height;
} else {
fb_width = 800;
fb_height = 600;
}
if (option_fb_refresh != 0) {
fb_refresh = option_fb_refresh;
} else {
fb_refresh = 60;
}
fb_depth = option_fb_depth;
if ((fb_depth != 32) && (fb_depth != 16) && (fb_depth != 8))
fb_depth = 16; /* sanity checked depth in bpp */
framebuffer_init(option_fb_device, fb_width, fb_height, fb_refresh, fb_depth, 1);
fb_switch_init();
fb_catch_exit_signals();
newfb = calloc(1, sizeof(framebuffer_t));
newfb->width = fb_var.xres;
newfb->height = fb_var.yres;
newfb->ptr = fb_mem;
newfb->linelen = fb_fix.line_length;
newfb->bpp = fb_var.bits_per_pixel;
if (newfb->bpp <= 8) {
for(ploop=0; ploop < 256; ploop++) {
newfb->palette[ploop] = 0xFF000000 |
ocmap.blue[ploop] << 16 |
ocmap.green[ploop] << 8 |
ocmap.red[ploop] ;
}
}
fb_open_input_devices();
return newfb;
}
void fb_os_quit(framebuffer_t *fb)
{
fb_cleanup();
}
static int keymap[] = {
-1, -1, '1', '2', '3', '4', '5', '6', '7', '8', /* 0 - 9 */
'9', '0', '-', '=', 8, 9, 'q', 'w', 'e', 'r', /* 10 - 19 */
't', 'y', 'u', 'i', 'o', 'p', '[', ']', 13, -1, /* 20 - 29 */
'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', /* 30 - 39 */
'\'', '#', -1, '\\', 'z', 'x', 'c', 'v', 'b', 'n', /* 40 - 49 */
'm', ',', '.', '/', -1, -1, -1, ' ', -1, -1, /* 50 - 59 */
};
static int sh_keymap[] = {
-1, -1, '!', '"', 0xa3, '$', '%', '^', '&', '*', /* 0 - 9 */
'(', ')', '_', '+', 8, 9, 'Q', 'W', 'E', 'R', /* 10 - 19 */
'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', 13, -1, /* 20 - 29 */
'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', /* 30 - 39 */
'@', '~', -1, '|', 'Z', 'X', 'C', 'V', 'B', 'N', /* 40 - 49 */
'M', '<', '>', '?', -1, -1, -1, ' ', -1, -1, /* 50 - 59 */
};
/* performs character mapping */
static int keycode_to_ucs4(int code, bool shift)
{
int ucs4 = -1;
if (shift) {
if ((code >= 0) && (code < sizeof(sh_keymap)))
ucs4 = sh_keymap[code];
} else {
if ((code >= 0) && (code < sizeof(keymap)))
ucs4 = keymap[code];
}
return ucs4;
}
void fb_os_input(struct gui_window *g, bool active)
{
ssize_t amt;
struct input_event event;
fb_input_dev *d;
int ucs4 = -1;
static bool shift = false;
for (d = inputdevs; d != NULL; d = d->next) {
amt = read(d->fd, &event, sizeof(struct input_event));
if (amt > 0) {
if (event.type == EV_KEY) {
if (event.value == 0) {
/* key up */
switch (event.code) {
case KEY_LEFTSHIFT:
case KEY_RIGHTSHIFT:
shift = false;
break;
case BTN_LEFT:
fb_rootwindow_click(g,
BROWSER_MOUSE_CLICK_1,
fb_cursor_x(framebuffer),
fb_cursor_y(framebuffer));
break;
}
return;
}
switch (event.code) {
case KEY_PAGEDOWN:
fb_window_scroll(g, 0, g->height);
break;
case KEY_PAGEUP:
fb_window_scroll(g, 0, -g->height);
break;
case KEY_DOWN:
fb_window_scroll(g, 0, 100);
break;
case KEY_UP:
fb_window_scroll(g, 0, -100);
break;
case KEY_LEFT:
fb_window_scroll(g, -100, 0);
break;
case KEY_RIGHT:
fb_window_scroll(g, 100, 0);
break;
case KEY_ESC:
browser_window_destroy(g->bw);
break;
case BTN_LEFT:
fb_rootwindow_click(g,
BROWSER_MOUSE_PRESS_1,
fb_cursor_x(framebuffer),
fb_cursor_y(framebuffer));
break;
case KEY_LEFTSHIFT:
case KEY_RIGHTSHIFT:
shift = true;
break;
default:
ucs4 = keycode_to_ucs4(event.code, shift);
}
} else if (event.type == EV_REL) {
switch (event.code) {
case 0:
fb_rootwindow_move(framebuffer, g, event.value, 0, true);
break;
case 1:
fb_rootwindow_move(framebuffer, g, 0, event.value, true);
break;
case 8:
fb_window_scroll(g, 0, event.value * -100);
break;
}
}
if (ucs4 != -1) {
fb_rootwindow_input(g, ucs4);
ucs4 = -1;
}
}
}
}
void
fb_os_option_override(void)
{
}
/* called by generic code to inform os code of screen update */
void
fb_os_redraw(struct bbox_s *box)
{
}
/*
* Local Variables:
* c-basic-offset:8
* End:
*/