1 /* vi: set sw=4 ts=4: */
3 * Copyright (C) 2008 Michele Sanges <michele.sanges@gmail.com>
5 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
8 * - use kernel option 'vga=xxx' or otherwise enable framebuffer device.
9 * - put somewhere fbsplash.cfg file and an image in .ppm format.
10 * - run applet: $ setsid fbsplash [params] &
12 * -d /dev/fbN: framebuffer device (if not /dev/fb0)
13 * -s path_to_image_file (can be "-" for stdin)
15 * -f path_to_fifo (can be "-" for stdin)
16 * - if you want to run it only in presence of a kernel parameter
17 * (for example fbsplash=on), use:
18 * grep -q "fbsplash=on" </proc/cmdline && setsid fbsplash [params]
19 * - commands for fifo:
20 * "NN" (ASCII decimal number) - percentage to show on progress bar.
21 * "exit" (or just close fifo) - well you guessed it.
27 /* If you want logging messages on /tmp/fbsplash.log... */
32 bool bdebug_messages; // enable/disable logging
33 FILE *logfile_fd; // log file
35 unsigned char *addr; // pointer to framebuffer memory
36 unsigned ns[7]; // n-parameters
37 const char *image_filename;
38 struct fb_var_screeninfo scr_var;
39 struct fb_fix_screeninfo scr_fix;
40 unsigned bytes_per_pixel;
42 #define G (*ptr_to_globals)
43 #define INIT_G() do { \
44 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
47 #define nbar_width ns[0] // progress bar width
48 #define nbar_height ns[1] // progress bar height
49 #define nbar_posx ns[2] // progress bar horizontal position
50 #define nbar_posy ns[3] // progress bar vertical position
51 #define nbar_colr ns[4] // progress bar color red component
52 #define nbar_colg ns[5] // progress bar color green component
53 #define nbar_colb ns[6] // progress bar color blue component
56 #define DEBUG_MESSAGE(strMessage, args...) \
57 if (G.bdebug_messages) { \
58 fprintf(G.logfile_fd, "[%s][%s] - %s\n", \
59 __FILE__, __FUNCTION__, strMessage); \
62 #define DEBUG_MESSAGE(...) ((void)0)
67 * Open and initialize the framebuffer device
68 * \param *strfb_device pointer to framebuffer device
70 static void fb_open(const char *strfb_device)
72 int fbfd = xopen(strfb_device, O_RDWR);
74 // framebuffer properties
75 xioctl(fbfd, FBIOGET_VSCREENINFO, &G.scr_var);
76 xioctl(fbfd, FBIOGET_FSCREENINFO, &G.scr_fix);
78 if (G.scr_var.bits_per_pixel < 16 || G.scr_var.bits_per_pixel > 32)
79 bb_error_msg_and_die("unsupported %u bpp", (int)G.scr_var.bits_per_pixel);
80 G.bytes_per_pixel = (G.scr_var.bits_per_pixel + 7) >> 3;
82 // map the device in memory
84 G.scr_var.xres * G.scr_var.yres * G.bytes_per_pixel,
85 PROT_WRITE, MAP_SHARED, fbfd, 0);
86 if (G.addr == MAP_FAILED)
87 bb_perror_msg_and_die("mmap");
89 // point to the start of the visible screen
90 G.addr += G.scr_var.yoffset * G.scr_fix.line_length + G.scr_var.xoffset * G.bytes_per_pixel;
96 * Return pixel value of the passed RGB color
98 static unsigned fb_pixel_value(unsigned r, unsigned g, unsigned b)
100 if (G.bytes_per_pixel == 2) {
101 r >>= 3; // 5-bit red
102 g >>= 2; // 6-bit green
103 b >>= 3; // 5-bit blue
104 return b + (g << 5) + (r << (5+6));
107 return b + (g << 8) + (r << 16);
111 * Draw pixel on framebuffer
113 static void fb_write_pixel(unsigned char *addr, unsigned pixel)
115 switch (G.bytes_per_pixel) {
117 *(uint16_t *)addr = pixel;
120 *(uint32_t *)addr = pixel;
122 default: // 24 bits per pixel
124 addr[1] = pixel >> 8;
125 addr[2] = pixel >> 16;
131 * Draw hollow rectangle on framebuffer
133 static void fb_drawrectangle(void)
137 unsigned char *ptr1, *ptr2;
138 unsigned char nred = G.nbar_colr/2;
139 unsigned char ngreen = G.nbar_colg/2;
140 unsigned char nblue = G.nbar_colb/2;
142 thispix = fb_pixel_value(nred, ngreen, nblue);
145 ptr1 = G.addr + (G.nbar_posy * G.scr_var.xres + G.nbar_posx) * G.bytes_per_pixel;
146 ptr2 = G.addr + ((G.nbar_posy + G.nbar_height - 1) * G.scr_var.xres + G.nbar_posx) * G.bytes_per_pixel;
147 cnt = G.nbar_width - 1;
149 fb_write_pixel(ptr1, thispix);
150 fb_write_pixel(ptr2, thispix);
151 ptr1 += G.bytes_per_pixel;
152 ptr2 += G.bytes_per_pixel;
153 } while (--cnt >= 0);
156 ptr1 = G.addr + (G.nbar_posy * G.scr_var.xres + G.nbar_posx) * G.bytes_per_pixel;
157 ptr2 = G.addr + (G.nbar_posy * G.scr_var.xres + G.nbar_posx + G.nbar_width - 1) * G.bytes_per_pixel;
158 cnt = G.nbar_height - 1;
160 fb_write_pixel(ptr1, thispix);
161 fb_write_pixel(ptr2, thispix);
162 ptr1 += G.scr_var.xres * G.bytes_per_pixel;
163 ptr2 += G.scr_var.xres * G.bytes_per_pixel;
164 } while (--cnt >= 0);
169 * Draw filled rectangle on framebuffer
170 * \param nx1pos,ny1pos upper left position
171 * \param nx2pos,ny2pos down right position
172 * \param nred,ngreen,nblue rgb color
174 static void fb_drawfullrectangle(int nx1pos, int ny1pos, int nx2pos, int ny2pos,
175 unsigned char nred, unsigned char ngreen, unsigned char nblue)
177 int cnt1, cnt2, nypos;
181 thispix = fb_pixel_value(nred, ngreen, nblue);
183 cnt1 = ny2pos - ny1pos;
186 ptr = G.addr + (nypos * G.scr_var.xres + nx1pos) * G.bytes_per_pixel;
187 cnt2 = nx2pos - nx1pos;
189 fb_write_pixel(ptr, thispix);
190 ptr += G.bytes_per_pixel;
191 } while (--cnt2 >= 0);
194 } while (--cnt1 >= 0);
199 * Draw a progress bar on framebuffer
200 * \param percent percentage of loading
202 static void fb_drawprogressbar(unsigned percent)
204 int i, left_x, top_y, width, height;
207 left_x = G.nbar_posx;
209 width = G.nbar_width - 1;
210 height = G.nbar_height - 1;
211 if ((height | width) < 0)
213 // NB: "width" of 1 actually makes rect with width of 2!
216 // inner "empty" rectangle
221 if ((height | width) < 0)
223 fb_drawfullrectangle(
225 left_x + width, top_y + height,
226 G.nbar_colr, G.nbar_colg, G.nbar_colb);
229 // actual progress bar
230 width = width * percent / 100;
233 height++; // divide by 0 is bad
235 // draw one-line thick "rectangle"
236 // top line will have gray lvl 200, bottom one 100
237 unsigned gray_level = 100 + i*100/height;
238 fb_drawfullrectangle(
239 left_x, top_y, left_x + width, top_y,
240 gray_level, gray_level, gray_level);
249 * Draw image from PPM file
251 static void fb_drawimage(void)
255 unsigned char *pixline;
256 unsigned i, j, width, height, line_size;
258 if (LONE_DASH(G.image_filename)) {
261 int fd = open_zipped(G.image_filename);
263 bb_simple_perror_msg_and_die(G.image_filename);
264 theme_file = xfdopen_for_read(fd);
268 * - Magic: two characters "P6".
269 * - Whitespace (blanks, TABs, CRs, LFs).
270 * - A width, formatted as ASCII characters in decimal.
272 * - A height, ASCII decimal.
274 * - The maximum color value, ASCII decimal, in 0..65535
275 * - Newline or other single whitespace character.
276 * (we support newline only)
277 * - A raster of Width * Height pixels in triplets of rgb
278 * in pure binary by 1 or 2 bytes. (we support only 1 byte)
280 #define concat_buf bb_common_bufsiz1
281 read_ptr = concat_buf;
283 int w, h, max_color_val;
284 int rem = concat_buf + sizeof(concat_buf) - read_ptr;
286 || fgets(read_ptr, rem, theme_file) == NULL
288 bb_error_msg_and_die("bad PPM file '%s'", G.image_filename);
290 read_ptr = strchrnul(read_ptr, '#');
291 *read_ptr = '\0'; /* ignore #comments */
292 if (sscanf(concat_buf, "P6 %u %u %u", &w, &h, &max_color_val) == 3
293 && max_color_val <= 255
295 width = w; /* w is on stack, width may be in register */
302 pixline = xmalloc(line_size);
304 if (width > G.scr_var.xres)
305 width = G.scr_var.xres;
306 if (height > G.scr_var.yres)
307 height = G.scr_var.yres;
308 for (j = 0; j < height; j++) {
309 unsigned char *pixel;
312 if (fread(pixline, 1, line_size, theme_file) != line_size)
313 bb_error_msg_and_die("bad PPM file '%s'", G.image_filename);
315 src = G.addr + j * G.scr_fix.line_length;
316 for (i = 0; i < width; i++) {
317 unsigned thispix = fb_pixel_value(pixel[0], pixel[1], pixel[2]);
318 fb_write_pixel(src, thispix);
319 src += G.bytes_per_pixel;
329 * Parse configuration file
330 * \param *cfg_filename name of the configuration file
332 static void init(const char *cfg_filename)
334 static const char param_names[] ALIGN1 =
335 "BAR_WIDTH\0" "BAR_HEIGHT\0"
336 "BAR_LEFT\0" "BAR_TOP\0"
337 "BAR_R\0" "BAR_G\0" "BAR_B\0"
343 parser_t *parser = config_open2(cfg_filename, xfopen_stdin);
344 while (config_read(parser, token, 2, 2, "#=",
345 (PARSE_NORMAL | PARSE_MIN_DIE) & ~(PARSE_TRIM | PARSE_COLLAPSE))) {
346 unsigned val = xatoi_positive(token[1]);
347 int i = index_in_strings(param_names, token[0]);
349 bb_error_msg_and_die("syntax error: %s", token[0]);
354 G.bdebug_messages = val;
355 if (G.bdebug_messages)
356 G.logfile_fd = xfopen_for_write("/tmp/fbsplash.log");
360 config_close(parser);
364 int fbsplash_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
365 int fbsplash_main(int argc UNUSED_PARAM, char **argv)
367 const char *fb_device, *cfg_filename, *fifo_filename;
368 FILE *fp = fp; // for compiler
375 // parse command line options
376 fb_device = "/dev/fb0";
378 fifo_filename = NULL;
379 bCursorOff = 1 & getopt32(argv, "cs:d:i:f:",
380 &G.image_filename, &fb_device, &cfg_filename, &fifo_filename);
382 // parse configuration file
386 // We must have -s IMG
387 if (!G.image_filename)
392 if (fifo_filename && bCursorOff) {
393 // hide cursor (BEFORE any fb ops)
394 full_write(STDOUT_FILENO, "\033[?25l", 6);
402 fp = xfopen_stdin(fifo_filename);
404 // For named pipes, we want to support this:
406 // fbsplash -f cmd_pipe .... &
411 // This means that we don't want fbsplash to get EOF
412 // when last writer closes input end.
413 // The simplest way is to open fifo for writing too
414 // and become an additional writer :)
415 open(fifo_filename, O_WRONLY); // errors are ignored
418 fb_drawprogressbar(0);
419 // Block on read, waiting for some input.
420 // Use of <stdio.h> style I/O allows to correctly
421 // handle a case when we have many buffered lines
422 // already in the pipe
423 while ((num_buf = xmalloc_fgetline(fp)) != NULL) {
424 if (strncmp(num_buf, "exit", 4) == 0) {
425 DEBUG_MESSAGE("exit");
429 if (isdigit(num_buf[0]) && (num <= 100)) {
431 DEBUG_MESSAGE(itoa(num));
433 fb_drawprogressbar(num);
438 if (bCursorOff) // restore cursor
439 full_write(STDOUT_FILENO, "\033[?25h", 6);