1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * Copyright (C) 2008 Michele Sanges <michele.sanges@gmail.com>
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4 | *
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5 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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6 | *
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7 | * Usage:
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8 | * - use kernel option 'vga=xxx' or otherwise enable framebuffer device.
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9 | * - put somewhere fbsplash.cfg file and an image in .ppm format.
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10 | * - run applet: $ setsid fbsplash [params] &
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11 | * -c: hide cursor
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12 | * -d /dev/fbN: framebuffer device (if not /dev/fb0)
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13 | * -s path_to_image_file (can be "-" for stdin)
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14 | * -i path_to_cfg_file
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15 | * -f path_to_fifo (can be "-" for stdin)
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16 | * - if you want to run it only in presence of a kernel parameter
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17 | * (for example fbsplash=on), use:
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18 | * grep -q "fbsplash=on" </proc/cmdline && setsid fbsplash [params]
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19 | * - commands for fifo:
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20 | * "NN" (ASCII decimal number) - percentage to show on progress bar.
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21 | * "exit" (or just close fifo) - well you guessed it.
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22 | */
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23 |
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24 | //usage:#define fbsplash_trivial_usage
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25 | //usage: "-s IMGFILE [-c] [-d DEV] [-i INIFILE] [-f CMD]"
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26 | //usage:#define fbsplash_full_usage "\n\n"
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27 | //usage: " -s Image"
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28 | //usage: "\n -c Hide cursor"
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29 | //usage: "\n -d Framebuffer device (default /dev/fb0)"
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30 | //usage: "\n -i Config file (var=value):"
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31 | //usage: "\n BAR_LEFT,BAR_TOP,BAR_WIDTH,BAR_HEIGHT"
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32 | //usage: "\n BAR_R,BAR_G,BAR_B"
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33 | //usage: "\n -f Control pipe (else exit after drawing image)"
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34 | //usage: "\n commands: 'NN' (% for progress bar) or 'exit'"
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35 |
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36 | #include "libbb.h"
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37 | #include <linux/fb.h>
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38 |
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39 | /* If you want logging messages on /tmp/fbsplash.log... */
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40 | #define DEBUG 0
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41 |
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42 | struct globals {
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43 | #if DEBUG
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44 | bool bdebug_messages; // enable/disable logging
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45 | FILE *logfile_fd; // log file
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46 | #endif
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47 | unsigned char *addr; // pointer to framebuffer memory
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48 | unsigned ns[7]; // n-parameters
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49 | const char *image_filename;
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50 | struct fb_var_screeninfo scr_var;
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51 | struct fb_fix_screeninfo scr_fix;
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52 | unsigned bytes_per_pixel;
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53 | // cached (8 - scr_var.COLOR.length):
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54 | unsigned red_shift;
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55 | unsigned green_shift;
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56 | unsigned blue_shift;
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57 | };
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58 | #define G (*ptr_to_globals)
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59 | #define INIT_G() do { \
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60 | SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
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61 | } while (0)
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62 |
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63 | #define nbar_width ns[0] // progress bar width
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64 | #define nbar_height ns[1] // progress bar height
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65 | #define nbar_posx ns[2] // progress bar horizontal position
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66 | #define nbar_posy ns[3] // progress bar vertical position
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67 | #define nbar_colr ns[4] // progress bar color red component
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68 | #define nbar_colg ns[5] // progress bar color green component
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69 | #define nbar_colb ns[6] // progress bar color blue component
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70 |
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71 | #if DEBUG
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72 | #define DEBUG_MESSAGE(strMessage, args...) \
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73 | if (G.bdebug_messages) { \
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74 | fprintf(G.logfile_fd, "[%s][%s] - %s\n", \
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75 | __FILE__, __FUNCTION__, strMessage); \
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76 | }
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77 | #else
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78 | #define DEBUG_MESSAGE(...) ((void)0)
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79 | #endif
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80 |
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81 | /**
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82 | * Configure palette for RGB:332
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83 | */
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84 | static void fb_setpal(int fd)
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85 | {
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86 | struct fb_cmap cmap;
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87 | /* fb colors are 16 bit */
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88 | unsigned short red[256], green[256], blue[256];
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89 | unsigned i;
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90 |
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91 | /* RGB:332 */
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92 | for (i = 0; i < 256; i++) {
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93 | /* Color is encoded in pixel value as rrrgggbb.
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94 | * 3-bit color is mapped to 16-bit one as:
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95 | * 000 -> 00000000 00000000
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96 | * 001 -> 00100100 10010010
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97 | * ...
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98 | * 011 -> 01101101 10110110
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99 | * 100 -> 10010010 01001001
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100 | * ...
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101 | * 111 -> 11111111 11111111
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102 | */
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103 | red[i] = (( i >> 5 ) * 0x9249) >> 2; // rrr * 00 10010010 01001001 >> 2
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104 | green[i] = (((i >> 2) & 0x7) * 0x9249) >> 2; // ggg * 00 10010010 01001001 >> 2
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105 | /* 2-bit color is easier: */
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106 | blue[i] = ( i & 0x3) * 0x5555; // bb * 01010101 01010101
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107 | }
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108 |
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109 | cmap.start = 0;
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110 | cmap.len = 256;
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111 | cmap.red = red;
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112 | cmap.green = green;
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113 | cmap.blue = blue;
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114 | cmap.transp = 0;
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115 |
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116 | xioctl(fd, FBIOPUTCMAP, &cmap);
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117 | }
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118 |
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119 | /**
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120 | * Open and initialize the framebuffer device
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121 | * \param *strfb_device pointer to framebuffer device
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122 | */
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123 | static void fb_open(const char *strfb_device)
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124 | {
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125 | int fbfd = xopen(strfb_device, O_RDWR);
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126 |
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127 | // framebuffer properties
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128 | xioctl(fbfd, FBIOGET_VSCREENINFO, &G.scr_var);
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129 | xioctl(fbfd, FBIOGET_FSCREENINFO, &G.scr_fix);
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130 |
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131 | switch (G.scr_var.bits_per_pixel) {
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132 | case 8:
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133 | fb_setpal(fbfd);
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134 | break;
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135 |
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136 | case 16:
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137 | case 24:
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138 | case 32:
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139 | break;
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140 |
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141 | default:
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142 | bb_error_msg_and_die("unsupported %u bpp", (int)G.scr_var.bits_per_pixel);
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143 | break;
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144 | }
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145 |
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146 | G.red_shift = 8 - G.scr_var.red.length;
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147 | G.green_shift = 8 - G.scr_var.green.length;
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148 | G.blue_shift = 8 - G.scr_var.blue.length;
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149 | G.bytes_per_pixel = (G.scr_var.bits_per_pixel + 7) >> 3;
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150 |
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151 | // map the device in memory
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152 | G.addr = mmap(NULL,
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153 | G.scr_var.yres * G.scr_fix.line_length,
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154 | PROT_WRITE, MAP_SHARED, fbfd, 0);
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155 | if (G.addr == MAP_FAILED)
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156 | bb_perror_msg_and_die("mmap");
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157 |
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158 | // point to the start of the visible screen
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159 | G.addr += G.scr_var.yoffset * G.scr_fix.line_length + G.scr_var.xoffset * G.bytes_per_pixel;
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160 | close(fbfd);
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161 | }
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162 |
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163 |
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164 | /**
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165 | * Return pixel value of the passed RGB color.
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166 | * This is performance critical fn.
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167 | */
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168 | static unsigned fb_pixel_value(unsigned r, unsigned g, unsigned b)
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169 | {
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170 | /* We assume that the r,g,b values are <= 255 */
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171 |
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172 | if (G.bytes_per_pixel == 1) {
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173 | r = r & 0xe0; // 3-bit red
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174 | g = (g >> 3) & 0x1c; // 3-bit green
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175 | b = b >> 6; // 2-bit blue
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176 | return r + g + b;
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177 | }
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178 | if (G.bytes_per_pixel == 2) {
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179 | // ARM PL110 on Integrator/CP has RGBA5551 bit arrangement.
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180 | // We want to support bit locations like that.
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181 | //
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182 | // First shift out unused bits
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183 | r = r >> G.red_shift;
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184 | g = g >> G.green_shift;
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185 | b = b >> G.blue_shift;
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186 | // Then shift the remaining bits to their offset
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187 | return (r << G.scr_var.red.offset) +
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188 | (g << G.scr_var.green.offset) +
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189 | (b << G.scr_var.blue.offset);
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190 | }
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191 | // RGB 888
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192 | return b + (g << 8) + (r << 16);
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193 | }
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194 |
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195 | /**
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196 | * Draw pixel on framebuffer
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197 | */
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198 | static void fb_write_pixel(unsigned char *addr, unsigned pixel)
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199 | {
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200 | switch (G.bytes_per_pixel) {
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201 | case 1:
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202 | *addr = pixel;
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203 | break;
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204 | case 2:
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205 | *(uint16_t *)addr = pixel;
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206 | break;
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207 | case 4:
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208 | *(uint32_t *)addr = pixel;
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209 | break;
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210 | default: // 24 bits per pixel
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211 | addr[0] = pixel;
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212 | addr[1] = pixel >> 8;
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213 | addr[2] = pixel >> 16;
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214 | }
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215 | }
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216 |
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217 |
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218 | /**
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219 | * Draw hollow rectangle on framebuffer
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220 | */
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221 | static void fb_drawrectangle(void)
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222 | {
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223 | int cnt;
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224 | unsigned thispix;
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225 | unsigned char *ptr1, *ptr2;
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226 | unsigned char nred = G.nbar_colr/2;
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227 | unsigned char ngreen = G.nbar_colg/2;
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228 | unsigned char nblue = G.nbar_colb/2;
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229 |
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230 | thispix = fb_pixel_value(nred, ngreen, nblue);
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231 |
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232 | // horizontal lines
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233 | ptr1 = G.addr + G.nbar_posy * G.scr_fix.line_length + G.nbar_posx * G.bytes_per_pixel;
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234 | ptr2 = G.addr + (G.nbar_posy + G.nbar_height - 1) * G.scr_fix.line_length + G.nbar_posx * G.bytes_per_pixel;
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235 | cnt = G.nbar_width - 1;
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236 | do {
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237 | fb_write_pixel(ptr1, thispix);
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238 | fb_write_pixel(ptr2, thispix);
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239 | ptr1 += G.bytes_per_pixel;
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240 | ptr2 += G.bytes_per_pixel;
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241 | } while (--cnt >= 0);
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242 |
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243 | // vertical lines
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244 | ptr1 = G.addr + G.nbar_posy * G.scr_fix.line_length + G.nbar_posx * G.bytes_per_pixel;
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245 | ptr2 = G.addr + G.nbar_posy * G.scr_fix.line_length + (G.nbar_posx + G.nbar_width - 1) * G.bytes_per_pixel;
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246 | cnt = G.nbar_height - 1;
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247 | do {
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248 | fb_write_pixel(ptr1, thispix);
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249 | fb_write_pixel(ptr2, thispix);
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250 | ptr1 += G.scr_fix.line_length;
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251 | ptr2 += G.scr_fix.line_length;
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252 | } while (--cnt >= 0);
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253 | }
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254 |
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255 |
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256 | /**
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257 | * Draw filled rectangle on framebuffer
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258 | * \param nx1pos,ny1pos upper left position
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259 | * \param nx2pos,ny2pos down right position
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260 | * \param nred,ngreen,nblue rgb color
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261 | */
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262 | static void fb_drawfullrectangle(int nx1pos, int ny1pos, int nx2pos, int ny2pos,
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263 | unsigned char nred, unsigned char ngreen, unsigned char nblue)
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264 | {
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265 | int cnt1, cnt2, nypos;
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266 | unsigned thispix;
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267 | unsigned char *ptr;
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268 |
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269 | thispix = fb_pixel_value(nred, ngreen, nblue);
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270 |
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271 | cnt1 = ny2pos - ny1pos;
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272 | nypos = ny1pos;
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273 | do {
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274 | ptr = G.addr + nypos * G.scr_fix.line_length + nx1pos * G.bytes_per_pixel;
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275 | cnt2 = nx2pos - nx1pos;
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276 | do {
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277 | fb_write_pixel(ptr, thispix);
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278 | ptr += G.bytes_per_pixel;
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279 | } while (--cnt2 >= 0);
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280 |
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281 | nypos++;
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282 | } while (--cnt1 >= 0);
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283 | }
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284 |
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285 |
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286 | /**
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287 | * Draw a progress bar on framebuffer
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288 | * \param percent percentage of loading
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289 | */
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290 | static void fb_drawprogressbar(unsigned percent)
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291 | {
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292 | int left_x, top_y, pos_x;
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293 | unsigned width, height;
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294 |
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295 | // outer box
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296 | left_x = G.nbar_posx;
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297 | top_y = G.nbar_posy;
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298 | width = G.nbar_width - 1;
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299 | height = G.nbar_height - 1;
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300 | if ((int)(height | width) < 0)
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301 | return;
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302 | // NB: "width" of 1 actually makes rect with width of 2!
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303 | fb_drawrectangle();
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304 |
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305 | // inner "empty" rectangle
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306 | left_x++;
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307 | top_y++;
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308 | width -= 2;
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309 | height -= 2;
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310 | if ((int)(height | width) < 0)
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311 | return;
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312 |
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313 | pos_x = left_x;
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314 | if (percent > 0) {
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315 | int i, y;
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316 |
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317 | // actual progress bar
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318 | pos_x += (unsigned)(width * percent) / 100;
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319 |
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320 | y = top_y;
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321 | i = height;
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322 | if (height == 0)
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323 | height++; // divide by 0 is bad
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324 | while (i >= 0) {
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325 | // draw one-line thick "rectangle"
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326 | // top line will have gray lvl 200, bottom one 100
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327 | unsigned gray_level = 100 + (unsigned)i*100 / height;
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328 | fb_drawfullrectangle(
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329 | left_x, y, pos_x, y,
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330 | gray_level, gray_level, gray_level);
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331 | y++;
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332 | i--;
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333 | }
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334 | }
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335 |
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336 | fb_drawfullrectangle(
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337 | pos_x, top_y,
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338 | left_x + width, top_y + height,
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339 | G.nbar_colr, G.nbar_colg, G.nbar_colb);
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340 | }
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341 |
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342 |
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343 | /**
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344 | * Draw image from PPM file
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345 | */
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346 | static void fb_drawimage(void)
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347 | {
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348 | FILE *theme_file;
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349 | char *read_ptr;
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350 | unsigned char *pixline;
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351 | unsigned i, j, width, height, line_size;
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352 |
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353 | if (LONE_DASH(G.image_filename)) {
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354 | theme_file = stdin;
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355 | } else {
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356 | int fd = open_zipped(G.image_filename);
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357 | if (fd < 0)
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358 | bb_simple_perror_msg_and_die(G.image_filename);
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359 | theme_file = xfdopen_for_read(fd);
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360 | }
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361 |
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362 | /* Parse ppm header:
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363 | * - Magic: two characters "P6".
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364 | * - Whitespace (blanks, TABs, CRs, LFs).
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365 | * - A width, formatted as ASCII characters in decimal.
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366 | * - Whitespace.
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367 | * - A height, ASCII decimal.
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368 | * - Whitespace.
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369 | * - The maximum color value, ASCII decimal, in 0..65535
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370 | * - Newline or other single whitespace character.
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371 | * (we support newline only)
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372 | * - A raster of Width * Height pixels in triplets of rgb
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373 | * in pure binary by 1 or 2 bytes. (we support only 1 byte)
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374 | */
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375 | #define concat_buf bb_common_bufsiz1
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376 | read_ptr = concat_buf;
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377 | while (1) {
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378 | int w, h, max_color_val;
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379 | int rem = concat_buf + sizeof(concat_buf) - read_ptr;
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380 | if (rem < 2
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381 | || fgets(read_ptr, rem, theme_file) == NULL
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382 | ) {
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383 | bb_error_msg_and_die("bad PPM file '%s'", G.image_filename);
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384 | }
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385 | read_ptr = strchrnul(read_ptr, '#');
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386 | *read_ptr = '\0'; /* ignore #comments */
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387 | if (sscanf(concat_buf, "P6 %u %u %u", &w, &h, &max_color_val) == 3
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388 | && max_color_val <= 255
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389 | ) {
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390 | width = w; /* w is on stack, width may be in register */
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391 | height = h;
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392 | break;
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393 | }
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394 | }
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395 |
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396 | line_size = width*3;
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397 | pixline = xmalloc(line_size);
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398 |
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399 | if (width > G.scr_var.xres)
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400 | width = G.scr_var.xres;
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401 | if (height > G.scr_var.yres)
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402 | height = G.scr_var.yres;
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403 | for (j = 0; j < height; j++) {
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404 | unsigned char *pixel;
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405 | unsigned char *src;
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406 |
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407 | if (fread(pixline, 1, line_size, theme_file) != line_size)
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408 | bb_error_msg_and_die("bad PPM file '%s'", G.image_filename);
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409 | pixel = pixline;
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410 | src = G.addr + j * G.scr_fix.line_length;
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411 | for (i = 0; i < width; i++) {
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412 | unsigned thispix = fb_pixel_value(pixel[0], pixel[1], pixel[2]);
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413 | fb_write_pixel(src, thispix);
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414 | src += G.bytes_per_pixel;
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415 | pixel += 3;
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416 | }
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417 | }
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418 | free(pixline);
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419 | fclose(theme_file);
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420 | }
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421 |
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422 |
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423 | /**
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424 | * Parse configuration file
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425 | * \param *cfg_filename name of the configuration file
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426 | */
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427 | static void init(const char *cfg_filename)
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428 | {
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429 | static const char param_names[] ALIGN1 =
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430 | "BAR_WIDTH\0" "BAR_HEIGHT\0"
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431 | "BAR_LEFT\0" "BAR_TOP\0"
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432 | "BAR_R\0" "BAR_G\0" "BAR_B\0"
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433 | #if DEBUG
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434 | "DEBUG\0"
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435 | #endif
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436 | ;
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437 | char *token[2];
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438 | parser_t *parser = config_open2(cfg_filename, xfopen_stdin);
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439 | while (config_read(parser, token, 2, 2, "#=",
|
---|
440 | (PARSE_NORMAL | PARSE_MIN_DIE) & ~(PARSE_TRIM | PARSE_COLLAPSE))) {
|
---|
441 | unsigned val = xatoi_positive(token[1]);
|
---|
442 | int i = index_in_strings(param_names, token[0]);
|
---|
443 | if (i < 0)
|
---|
444 | bb_error_msg_and_die("syntax error: %s", token[0]);
|
---|
445 | if (i >= 0 && i < 7)
|
---|
446 | G.ns[i] = val;
|
---|
447 | #if DEBUG
|
---|
448 | if (i == 7) {
|
---|
449 | G.bdebug_messages = val;
|
---|
450 | if (G.bdebug_messages)
|
---|
451 | G.logfile_fd = xfopen_for_write("/tmp/fbsplash.log");
|
---|
452 | }
|
---|
453 | #endif
|
---|
454 | }
|
---|
455 | config_close(parser);
|
---|
456 | }
|
---|
457 |
|
---|
458 |
|
---|
459 | int fbsplash_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
460 | int fbsplash_main(int argc UNUSED_PARAM, char **argv)
|
---|
461 | {
|
---|
462 | const char *fb_device, *cfg_filename, *fifo_filename;
|
---|
463 | FILE *fp = fp; // for compiler
|
---|
464 | char *num_buf;
|
---|
465 | unsigned num;
|
---|
466 | bool bCursorOff;
|
---|
467 |
|
---|
468 | INIT_G();
|
---|
469 |
|
---|
470 | // parse command line options
|
---|
471 | fb_device = "/dev/fb0";
|
---|
472 | cfg_filename = NULL;
|
---|
473 | fifo_filename = NULL;
|
---|
474 | bCursorOff = 1 & getopt32(argv, "cs:d:i:f:",
|
---|
475 | &G.image_filename, &fb_device, &cfg_filename, &fifo_filename);
|
---|
476 |
|
---|
477 | // parse configuration file
|
---|
478 | if (cfg_filename)
|
---|
479 | init(cfg_filename);
|
---|
480 |
|
---|
481 | // We must have -s IMG
|
---|
482 | if (!G.image_filename)
|
---|
483 | bb_show_usage();
|
---|
484 |
|
---|
485 | fb_open(fb_device);
|
---|
486 |
|
---|
487 | if (fifo_filename && bCursorOff) {
|
---|
488 | // hide cursor (BEFORE any fb ops)
|
---|
489 | full_write(STDOUT_FILENO, "\033[?25l", 6);
|
---|
490 | }
|
---|
491 |
|
---|
492 | fb_drawimage();
|
---|
493 |
|
---|
494 | if (!fifo_filename)
|
---|
495 | return EXIT_SUCCESS;
|
---|
496 |
|
---|
497 | fp = xfopen_stdin(fifo_filename);
|
---|
498 | if (fp != stdin) {
|
---|
499 | // For named pipes, we want to support this:
|
---|
500 | // mkfifo cmd_pipe
|
---|
501 | // fbsplash -f cmd_pipe .... &
|
---|
502 | // ...
|
---|
503 | // echo 33 >cmd_pipe
|
---|
504 | // ...
|
---|
505 | // echo 66 >cmd_pipe
|
---|
506 | // This means that we don't want fbsplash to get EOF
|
---|
507 | // when last writer closes input end.
|
---|
508 | // The simplest way is to open fifo for writing too
|
---|
509 | // and become an additional writer :)
|
---|
510 | open(fifo_filename, O_WRONLY); // errors are ignored
|
---|
511 | }
|
---|
512 |
|
---|
513 | fb_drawprogressbar(0);
|
---|
514 | // Block on read, waiting for some input.
|
---|
515 | // Use of <stdio.h> style I/O allows to correctly
|
---|
516 | // handle a case when we have many buffered lines
|
---|
517 | // already in the pipe
|
---|
518 | while ((num_buf = xmalloc_fgetline(fp)) != NULL) {
|
---|
519 | if (strncmp(num_buf, "exit", 4) == 0) {
|
---|
520 | DEBUG_MESSAGE("exit");
|
---|
521 | break;
|
---|
522 | }
|
---|
523 | num = atoi(num_buf);
|
---|
524 | if (isdigit(num_buf[0]) && (num <= 100)) {
|
---|
525 | #if DEBUG
|
---|
526 | DEBUG_MESSAGE(itoa(num));
|
---|
527 | #endif
|
---|
528 | fb_drawprogressbar(num);
|
---|
529 | }
|
---|
530 | free(num_buf);
|
---|
531 | }
|
---|
532 |
|
---|
533 | if (bCursorOff) // restore cursor
|
---|
534 | full_write(STDOUT_FILENO, "\033[?25h", 6);
|
---|
535 |
|
---|
536 | return EXIT_SUCCESS;
|
---|
537 | }
|
---|