--- /dev/null
+/* vi: set sw=4 ts=4: */
+/*
+ * splash implementation for busybox
+ *
+ * Copyright (C) 2008 Michele Sanges <michele.sanges@otomelara.it>,
+ * <michele.sanges@gmail.it>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ *
+ * Usage:
+ * - use kernel option 'vga=xxx' or otherwise enable framebuffer device.
+ * - put somewhere the fbsplash.ini file and image in .ppm format.
+ * - configure applet by editing .ini file.
+ * - run applet: $ setsid fbsplash [params] &
+ * -c: hide cursor
+ * -d /dev/fbN: framebuffer device (if not /dev/fb0)
+ * -s path_of_image_file
+ * -i path_of_ini_file
+ * -f path_of_fifo (can be "-" for stdin)
+ * - if you want to run the applet only in presence of a kernel parameter
+ * (for example fbsplash=on), type:
+ * grep -q "fbsplash=on" </proc/cmdline && setsid fbsplash [params]
+ * - commands for fifo:
+ * "NN" (ASCII decimal number) - percentage to show on progress bar.
+ * "exit" (or just close fifo) - well you guessed it.
+ */
+
+/**
+ * Splash implementation for busybox
+ * \file: fbsplash.c
+ * \author Michele Sanges <michele.sanges@otomelara.it> <michele.sanges@gmail.com>
+ * \version 1.0.0
+ * \date 07/03/2008
+ */
+
+#include "libbb.h"
+#include <linux/fb.h>
+
+/* If you want logging messages on /tmp/fbsplash_log... */
+#define DEBUG 0
+
+#define BYTES_PER_PIXEL 2
+
+typedef unsigned short DATA;
+
+struct globals {
+#if DEBUG
+ bool bdebug_messages; // enable/disable logging
+ FILE *logfile_fd; // log file
+#endif
+ unsigned char *addr; // pointer to framebuffer memory
+ unsigned nbar_width; // progress bar width
+ unsigned nbar_height; // progress bar height
+ unsigned nbar_posx; // progress bar horizontal position
+ unsigned nbar_posy; // progress bar vertical position
+ unsigned char nbar_colr; // progress bar color red component
+ unsigned char nbar_colg; // progress bar color green component
+ unsigned char nbar_colb; // progress bar color blue component
+ const char *image_filename;
+ struct fb_var_screeninfo scr_var;
+ struct fb_fix_screeninfo scr_fix;
+};
+#define G (*ptr_to_globals)
+#define INIT_G() \
+ do { \
+ SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
+ } while (0)
+
+
+#if DEBUG
+#define DEBUG_MESSAGE(strMessage, args...) \
+ if (G.bdebug_messages) { \
+ fprintf(G.logfile_fd, "[%s][%s] - %s\n", \
+ __FILE__, __FUNCTION__, strMessage); \
+ }
+#else
+#define DEBUG_MESSAGE(...) ((void)0)
+#endif
+
+
+/**
+ * Open and initialize the framebuffer device
+ * \param *strfb_device pointer to framebuffer device
+ */
+static void fb_open(const char *strfb_device)
+{
+ int fbfd = xopen(strfb_device, O_RDWR);
+
+ // framebuffer properties
+ xioctl(fbfd, FBIOGET_VSCREENINFO, &G.scr_var);
+ xioctl(fbfd, FBIOGET_FSCREENINFO, &G.scr_fix);
+
+ if (G.scr_var.bits_per_pixel != 16)
+ bb_error_msg_and_die("only 16 bpp is supported");
+
+ // map the device in memory
+ G.addr = mmap(NULL,
+ G.scr_var.xres * G.scr_var.yres
+ * BYTES_PER_PIXEL /*(G.scr_var.bits_per_pixel / 8)*/ ,
+ PROT_WRITE, MAP_SHARED, fbfd, 0);
+ if (G.addr == MAP_FAILED)
+ bb_perror_msg_and_die("can't mmap %s", strfb_device);
+ close(fbfd);
+}
+
+
+/**
+ * Draw hollow rectangle on framebuffer
+ * \param nx1pos,ny1pos upper left position
+ * \param nx2pos,ny2pos down right position
+ * \param nred24,ngreen24,nblue24 rgb color
+ */
+static void fb_drawrectangle(int nx1pos, int ny1pos, int nx2pos, int ny2pos,
+ unsigned char nred, unsigned char ngreen, unsigned char nblue)
+{
+ int cnt;
+ DATA thispix;
+ DATA *ptr1, *ptr2;
+
+ nred >>= 3; // 5-bit red
+ ngreen >>= 2; // 6-bit green
+ nblue >>= 3; // 5-bit blue
+ thispix = nblue + (ngreen << 5) + (nred << (5+6));
+
+ // horizontal lines
+ ptr1 = (DATA*)(G.addr + (ny1pos * G.scr_var.xres + nx1pos) * BYTES_PER_PIXEL);
+ ptr2 = (DATA*)(G.addr + (ny2pos * G.scr_var.xres + nx1pos) * BYTES_PER_PIXEL);
+ cnt = nx2pos - nx1pos;
+ do {
+ *ptr1++ = thispix;
+ *ptr2++ = thispix;
+ } while (--cnt >= 0);
+
+ // vertical lines
+ ptr1 = (DATA*)(G.addr + (ny1pos * G.scr_var.xres + nx1pos) * BYTES_PER_PIXEL);
+ ptr2 = (DATA*)(G.addr + (ny1pos * G.scr_var.xres + nx2pos) * BYTES_PER_PIXEL);
+ cnt = ny2pos - ny1pos;
+ do {
+ *ptr1 = thispix; ptr1 += G.scr_var.xres;
+ *ptr2 = thispix; ptr2 += G.scr_var.xres;
+ } while (--cnt >= 0);
+}
+
+
+/**
+ * Draw filled rectangle on framebuffer
+ * \param nx1pos,ny1pos upper left position
+ * \param nx2pos,ny2pos down right position
+ * \param nred24,ngreen24,nblue24 rgb color
+ */
+static void fb_drawfullrectangle(int nx1pos, int ny1pos, int nx2pos, int ny2pos,
+ unsigned char nred, unsigned char ngreen, unsigned char nblue)
+{
+ int cnt1, cnt2, nypos;
+ DATA thispix;
+ DATA *ptr;
+
+ nred >>= 3; // 5-bit red
+ ngreen >>= 2; // 6-bit green
+ nblue >>= 3; // 5-bit blue
+ thispix = nblue + (ngreen << 5) + (nred << (5+6));
+
+ cnt1 = ny2pos - ny1pos;
+ nypos = ny1pos;
+ do {
+ ptr = (DATA*)(G.addr + (nypos * G.scr_var.xres + nx1pos) * BYTES_PER_PIXEL);
+ cnt2 = nx2pos - nx1pos;
+ do {
+ *ptr++ = thispix;
+ } while (--cnt2 >= 0);
+
+ nypos++;
+ } while (--cnt1 >= 0);
+}
+
+
+/**
+ * Draw a progress bar on framebuffer
+ * \param nPercent percentage of loading
+ */
+static void fb_drawprogressbar(unsigned nPercent)
+{
+ int i, left_x, top_y, width, height;
+ // outer box
+ left_x = G.nbar_posx;
+ top_y = G.nbar_posy;
+ width = G.nbar_width - 1;
+ height = G.nbar_height - 1;
+ if ((height | width) < 0)
+ return;
+ // NB: "width" of 1 actually makes rect with width of 2!
+ fb_drawrectangle(
+ left_x, top_y,
+ left_x + width, top_y + height,
+ G.nbar_colr/2, G.nbar_colg/2, G.nbar_colb/2);
+
+ // inner "empty" rectangle
+ left_x++;
+ top_y++;
+ width -= 2;
+ height -= 2;
+ if ((height | width) < 0)
+ return;
+ fb_drawfullrectangle(
+ left_x, top_y,
+ left_x + width, top_y + height,
+ G.nbar_colr, G.nbar_colg, G.nbar_colb);
+
+ if (nPercent > 0) {
+ // actual progress bar
+ width = width*nPercent/100;
+ i = height;
+ if (height == 0)
+ height++; // divide by 0 is bad
+ while (i >= 0) {
+ // draw one-line thick "rectangle"
+ // top line will have gray lvl 200, bottom one 100
+ unsigned gray_level = 100 + i*100/height;
+ fb_drawfullrectangle(
+ left_x, top_y, left_x + width, top_y,
+ gray_level, gray_level, gray_level);
+ top_y++;
+ i--;
+ }
+ }
+}
+
+
+/**
+ * Draw image from PPM file
+ */
+static void fb_drawimage(void)
+{
+ char head[256];
+ char s[80];
+ FILE *theme_file;
+ unsigned char *pixline;
+ unsigned i, j, width, height, line_size;
+
+ memset(head, 0, sizeof(head));
+ theme_file = xfopen_stdin(G.image_filename);
+
+ // parse ppm header
+ while (1) {
+ if (fgets(s, sizeof(s), theme_file) == NULL)
+ bb_error_msg_and_die("bad PPM file '%s'", G.image_filename);
+
+ if (s[0] == '#')
+ continue;
+
+ if (strlen(head) + strlen(s) >= sizeof(head))
+ bb_error_msg_and_die("bad PPM file '%s'", G.image_filename);
+
+ strcat(head, s);
+ if (head[0] != 'P' || head[1] != '6')
+ bb_error_msg_and_die("bad PPM file '%s'", G.image_filename);
+
+ // width, height, max_color_val
+ if (sscanf(head, "P6 %u %u %u", &width, &height, &i) == 3)
+ break;
+// TODO: i must be <= 255!
+ }
+
+ line_size = width*3;
+ if (width > G.scr_var.xres)
+ width = G.scr_var.xres;
+ if (height > G.scr_var.yres)
+ height = G.scr_var.yres;
+
+ pixline = xmalloc(line_size);
+ for (j = 0; j < height; j++) {
+ unsigned char *pixel = pixline;
+ DATA *src = (DATA *)(G.addr + j * G.scr_fix.line_length);
+
+ if (fread(pixline, 1, line_size, theme_file) != line_size)
+ bb_error_msg_and_die("bad PPM file '%s'", G.image_filename);
+ for (i = 0; i < width; i++) {
+ unsigned thispix;
+ thispix = (((unsigned)pixel[0] << 8) & 0xf800)
+ | (((unsigned)pixel[1] << 3) & 0x07e0)
+ | (((unsigned)pixel[2] >> 3));
+ *src++ = thispix;
+ pixel += 3;
+ }
+ }
+ free(pixline);
+ fclose(theme_file);
+}
+
+
+/**
+ * Parse configuration file
+ */
+static void init(const char *ini_filename)
+{
+ static const char const param_names[] ALIGN1 =
+ "BAR_LEFT\0" "BAR_TOP\0"
+ "BAR_WIDTH\0" "BAR_HEIGHT\0"
+ "BAR_R\0" "BAR_G\0" "BAR_B\0"
+#if DEBUG
+ "DEBUG\0"
+#endif
+ ;
+
+ FILE *inifile;
+ char *buf;
+
+ inifile = xfopen(ini_filename, "r");
+
+ while ((buf = xmalloc_getline(inifile)) != NULL) {
+ char *value_str;
+ int val;
+
+ if (*buf == '#') { // it's a comment
+ free(buf);
+ continue;
+ }
+
+ value_str = strchr(buf, '=');
+ if (!value_str)
+ goto err;
+ *value_str++ = '\0';
+ val = xatoi_u(value_str);
+
+ switch (index_in_strings(param_names, buf)) {
+ case 0:
+ // progress bar horizontal position
+ G.nbar_posx = val;
+ break;
+ case 1:
+ // progress bar vertical position
+ G.nbar_posy = val;
+ break;
+ case 2:
+ // progress bar width
+ G.nbar_width = val;
+ break;
+ case 3:
+ // progress bar height
+ G.nbar_height = val;
+ break;
+ case 4:
+ // progress bar color - red component
+ G.nbar_colr = val;
+ break;
+ case 5:
+ // progress bar color - green component
+ G.nbar_colg = val;
+ break;
+ case 6:
+ // progress bar color - blue component
+ G.nbar_colb = val;
+ break;
+#if DEBUG
+ case 7:
+ G.bdebug_messages = val;
+ if (G.bdebug_messages)
+ G.logfile_fd = xfopen("/tmp/fbsplash_log", "w");
+ break;
+#endif
+ err:
+ default:
+ bb_error_msg_and_die("syntax error: '%s'", buf);
+ }
+ free(buf);
+ }
+ fclose(inifile);
+}
+
+
+int fbsplash_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int fbsplash_main(int argc ATTRIBUTE_UNUSED, char **argv)
+{
+ char num_buf[16];
+ const char *fb_device, *ini_filename, *fifo_filename;
+ int fd = fd; // for compiler
+ int len, num;
+ bool bCursorOff;
+
+ INIT_G();
+
+ // parse command line options
+ fb_device = "/dev/fb0";
+ ini_filename = NULL;
+ fifo_filename = NULL;
+ bCursorOff = 1 & getopt32(argv, "cs:d:i:f:",
+ &G.image_filename, &fb_device, &ini_filename, &fifo_filename);
+
+ // parse configuration file
+ if (ini_filename)
+ init(ini_filename);
+
+ // We must have -s IMG
+ if (!G.image_filename)
+ bb_show_usage();
+
+ if (fifo_filename) {
+ fd = STDIN_FILENO;
+ if (NOT_LONE_DASH(fifo_filename)) {
+ // open command fifo/pipe
+ fd = xopen(fifo_filename, O_RDONLY | O_NOCTTY);
+ }
+ }
+
+ fb_open(fb_device);
+
+ if (fifo_filename && bCursorOff) {
+ // hide cursor (BEFORE any fb ops)
+ full_write(STDOUT_FILENO, "\x1b" "[?25l", 6);
+ }
+
+ fb_drawimage();
+
+ if (fifo_filename) {
+ num = 0;
+ goto draw_bar;
+
+ while (1) {
+ // block on read, waiting for some input
+ len = safe_read(fd, num_buf, sizeof(num_buf) - 1);
+ if (len <= 0) // EOF/error
+ break;
+ num_buf[len] = '\0';
+ // parse command
+ if (strncmp(num_buf, "exit", 4) == 0) {
+ DEBUG_MESSAGE("exit");
+ break;
+ }
+ num = atoi(num_buf);
+ if (isdigit(num_buf[0]) && (num >= 0) && (num <= 100)) {
+#if DEBUG
+ char strVal[10];
+ sprintf(strVal, "%d", num);
+ DEBUG_MESSAGE(strVal);
+#endif
+ draw_bar:
+ fb_drawprogressbar(num);
+ }
+ }
+ if (bCursorOff) {
+ // restore cursor
+ full_write(STDOUT_FILENO, "\x1b" "[?25h", 6);
+ }
+ if (ENABLE_FEATURE_CLEAN_UP)
+ close(fd);
+ }
+
+#if DEBUG
+ if (ENABLE_FEATURE_CLEAN_UP)
+ if (G.bdebug_messages)
+ fclose(G.logfile_fd);
+#endif
+
+ return EXIT_SUCCESS;
+}
projects / oweals / busybox.git / commitdiff