1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup raspberrypi |
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5 | * |
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6 | * @brief displaying characters on the console |
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7 | */ |
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8 | |
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9 | /** |
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10 | * |
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11 | * Copyright (c) 2015 Yang Qiao |
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12 | * based on work by: |
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13 | * Copyright (C) 1998 Eric Valette (valette@crf.canon.fr) |
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14 | * Canon Centre Recherche France. |
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15 | * |
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16 | * The license and distribution terms for this file may be |
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17 | * found in the file LICENSE in this distribution or at |
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18 | * http://www.rtems.org/license/LICENSE. |
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19 | * |
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20 | * Till Straumann <strauman@slac.stanford.edu>, 2003/9: |
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21 | * - added handling of basic escape sequences (cursor movement |
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22 | * and erasing; just enough for the line editor 'libtecla' to |
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23 | * work...) |
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24 | * |
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25 | */ |
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26 | |
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27 | #include <bsp.h> |
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28 | #include <bsp/vc.h> |
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29 | #include <bsp/rpi-fb.h> |
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30 | #include <rtems/fb.h> |
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31 | |
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32 | #include <stdlib.h> |
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33 | #include <string.h> |
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34 | #include "font_data.h" |
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35 | |
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36 | static void wr_cursor( |
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37 | int r, |
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38 | int c |
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39 | ) |
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40 | { |
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41 | /* dummy function for now */ |
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42 | } |
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43 | |
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44 | #define TAB_SPACE 4 |
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45 | #define CONSOLE_BG_COL 0x00 |
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46 | #define CONSOLE_FG_COL 0xa0 |
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47 | |
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48 | static void *fb_mem = NULL; |
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49 | static unsigned short maxCol; |
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50 | static unsigned short maxRow; |
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51 | static unsigned short bytes_per_pixel; |
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52 | static unsigned int bytes_per_line; |
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53 | static unsigned int bytes_per_char_line; |
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54 | static unsigned char row; |
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55 | static unsigned char column; |
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56 | static unsigned int nLines; |
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57 | static uint32_t fgx, bgx, eorx; |
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58 | static int rpi_video_initialized; |
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59 | |
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60 | static const int video_font_draw_table32[ 16 ][ 4 ] = { |
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61 | { 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, |
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62 | { 0x00000000, 0x00000000, 0x00000000, 0x00ffffff }, |
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63 | { 0x00000000, 0x00000000, 0x00ffffff, 0x00000000 }, |
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64 | { 0x00000000, 0x00000000, 0x00ffffff, 0x00ffffff }, |
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65 | { 0x00000000, 0x00ffffff, 0x00000000, 0x00000000 }, |
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66 | { 0x00000000, 0x00ffffff, 0x00000000, 0x00ffffff }, |
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67 | { 0x00000000, 0x00ffffff, 0x00ffffff, 0x00000000 }, |
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68 | { 0x00000000, 0x00ffffff, 0x00ffffff, 0x00ffffff }, |
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69 | { 0x00ffffff, 0x00000000, 0x00000000, 0x00000000 }, |
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70 | { 0x00ffffff, 0x00000000, 0x00000000, 0x00ffffff }, |
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71 | { 0x00ffffff, 0x00000000, 0x00ffffff, 0x00000000 }, |
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72 | { 0x00ffffff, 0x00000000, 0x00ffffff, 0x00ffffff }, |
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73 | { 0x00ffffff, 0x00ffffff, 0x00000000, 0x00000000 }, |
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74 | { 0x00ffffff, 0x00ffffff, 0x00000000, 0x00ffffff }, |
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75 | { 0x00ffffff, 0x00ffffff, 0x00ffffff, 0x00000000 }, |
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76 | { 0x00ffffff, 0x00ffffff, 0x00ffffff, 0x00ffffff } |
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77 | }; |
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78 | |
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79 | static void scroll( void ) |
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80 | { |
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81 | int i, j; /* Counters */ |
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82 | uint8_t *pt_scroll, *pt_bitmap; /* Pointers on the bit-map */ |
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83 | |
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84 | pt_bitmap = fb_mem; |
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85 | j = 0; |
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86 | pt_bitmap = pt_bitmap + j; |
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87 | pt_scroll = pt_bitmap + bytes_per_char_line; |
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88 | |
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89 | for ( i = j; i < maxRow - 1; i++ ) { |
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90 | memcpy( pt_bitmap, pt_scroll, bytes_per_char_line ); |
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91 | pt_bitmap = pt_bitmap + bytes_per_char_line; |
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92 | pt_scroll = pt_bitmap + bytes_per_char_line; |
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93 | } |
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94 | |
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95 | /* |
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96 | * Blank characters are displayed on the last line. |
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97 | */ |
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98 | memset( pt_bitmap, 0, bytes_per_char_line ); |
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99 | } |
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100 | |
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101 | static void doCRNL( |
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102 | int cr, |
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103 | int nl |
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104 | ) |
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105 | { |
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106 | if ( nl ) { |
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107 | if ( ++row == maxRow ) { |
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108 | scroll(); /* Scroll the screen now */ |
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109 | row = maxRow - 1; |
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110 | } |
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111 | |
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112 | nLines++; |
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113 | } |
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114 | |
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115 | if ( cr ) |
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116 | column = 0; |
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117 | |
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118 | /* Move cursor on the next location */ |
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119 | if ( cr || nl ) { |
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120 | wr_cursor( row, column ); |
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121 | } |
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122 | } |
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123 | |
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124 | static void advanceCursor( void ) |
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125 | { |
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126 | if ( ++column == maxCol ) |
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127 | doCRNL( 1, 1 ); |
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128 | else |
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129 | wr_cursor( row, column ); |
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130 | } |
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131 | |
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132 | static void gotorc( |
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133 | int r, |
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134 | int c |
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135 | ) |
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136 | { |
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137 | column = c; |
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138 | row = r; |
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139 | wr_cursor( row, column ); |
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140 | } |
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141 | |
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142 | static void video_drawchars( |
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143 | int r, |
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144 | int c, |
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145 | unsigned char ch |
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146 | ) |
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147 | { |
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148 | if ( fb_mem == NULL ) { |
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149 | return; |
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150 | } |
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151 | |
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152 | uint8_t *cdat, *dest, *dest0; |
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153 | int rows, offset; |
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154 | |
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155 | offset = r * bytes_per_char_line + c * bytes_per_pixel * RPI_FONT_WIDTH; |
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156 | dest0 = fb_mem + offset; |
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157 | |
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158 | /* |
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159 | * only 32-bit per pixel format is supported for now |
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160 | */ |
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161 | cdat = rpi_font + ch * RPI_FONT_HEIGHT; |
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162 | |
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163 | for ( rows = RPI_FONT_HEIGHT, dest = dest0; |
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164 | rows--; dest += bytes_per_line ) { |
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165 | uint8_t bits = *cdat++; |
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166 | |
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167 | ( (uint32_t *) dest )[ 0 ] = |
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168 | ( video_font_draw_table32 |
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169 | [ bits >> 4 ][ 0 ] & eorx ) ^ bgx; |
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170 | ( (uint32_t *) dest )[ 1 ] = |
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171 | ( video_font_draw_table32 |
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172 | [ bits >> 4 ][ 1 ] & eorx ) ^ bgx; |
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173 | ( (uint32_t *) dest )[ 2 ] = |
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174 | ( video_font_draw_table32 |
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175 | [ bits >> 4 ][ 2 ] & eorx ) ^ bgx; |
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176 | ( (uint32_t *) dest )[ 3 ] = |
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177 | ( video_font_draw_table32 |
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178 | [ bits >> 4 ][ 3 ] & eorx ) ^ bgx; |
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179 | |
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180 | ( (uint32_t *) dest )[ 4 ] = |
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181 | ( video_font_draw_table32 |
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182 | [ bits & 15 ][ 0 ] & eorx ) ^ bgx; |
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183 | ( (uint32_t *) dest )[ 5 ] = |
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184 | ( video_font_draw_table32 |
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185 | [ bits & 15 ][ 1 ] & eorx ) ^ bgx; |
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186 | ( (uint32_t *) dest )[ 6 ] = |
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187 | ( video_font_draw_table32 |
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188 | [ bits & 15 ][ 2 ] & eorx ) ^ bgx; |
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189 | ( (uint32_t *) dest )[ 7 ] = |
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190 | ( video_font_draw_table32 |
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191 | [ bits & 15 ][ 3 ] & eorx ) ^ bgx; |
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192 | } |
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193 | } |
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194 | |
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195 | #define ESC ( (char) 27 ) |
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196 | /* erase current location without moving the cursor */ |
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197 | #define BLANK ( (char) 0x7f ) |
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198 | |
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199 | static void videoPutChar( char ch ) |
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200 | { |
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201 | switch ( ch ) { |
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202 | case '\b': { |
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203 | if ( column ) |
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204 | column--; |
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205 | |
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206 | /* Move cursor on the previous location */ |
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207 | wr_cursor( row, column ); |
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208 | return; |
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209 | } |
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210 | case '\t': { |
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211 | int i; |
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212 | |
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213 | i = TAB_SPACE - ( column & ( TAB_SPACE - 1 ) ); |
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214 | |
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215 | while ( i-- ) { |
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216 | |
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217 | video_drawchars( row, column, ' ' ); |
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218 | column += 1; |
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219 | |
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220 | if ( column >= maxCol ) { |
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221 | doCRNL( 1, 1 ); |
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222 | return; |
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223 | } |
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224 | } |
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225 | |
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226 | wr_cursor( row, column ); |
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227 | |
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228 | return; |
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229 | } |
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230 | case '\n': { |
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231 | doCRNL( 0, 1 ); |
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232 | return; |
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233 | } |
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234 | case 7: { /* Bell code must be inserted here */ |
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235 | return; |
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236 | } |
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237 | case '\r': { |
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238 | doCRNL( 1, 0 ); |
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239 | return; |
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240 | } |
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241 | case BLANK: { |
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242 | video_drawchars( row, column, ' ' ); |
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243 | |
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244 | wr_cursor( row, column ); |
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245 | |
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246 | return; |
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247 | } |
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248 | default: { |
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249 | // *pt_bitmap = (unsigned char)ch | attribute; |
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250 | video_drawchars( row, column, ch ); |
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251 | advanceCursor(); |
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252 | return; |
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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 | /* trivial state machine to handle escape sequences: |
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258 | * |
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259 | * --------------------------------- |
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260 | * | | |
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261 | * | | |
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262 | * KEY: esc V [ DCABHKJ esc | |
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263 | * STATE: 0 -----> 27 -----> '[' ----------> -1 ----- |
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264 | * ^\ \ \ \ |
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265 | * KEY: | \other \ other \ other \ other |
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266 | * <------------------------------------- |
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267 | * |
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268 | * in state '-1', the DCABHKJ cases are handled |
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269 | * |
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270 | * (cursor motion and screen clearing) |
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271 | */ |
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272 | |
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273 | #define DONE ( -1 ) |
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274 | |
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275 | static int handleEscape( |
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276 | int oldState, |
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277 | char ch |
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278 | ) |
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279 | { |
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280 | int rval = 0; |
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281 | int ro, co; |
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282 | |
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283 | switch ( oldState ) { |
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284 | case DONE: /* means the previous char terminated an ESC sequence... */ |
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285 | case 0: |
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286 | |
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287 | if ( 27 == ch ) { |
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288 | rval = 27; /* START of an ESC sequence */ |
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289 | } |
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290 | |
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291 | break; |
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292 | |
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293 | case 27: |
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294 | |
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295 | if ( '[' == ch ) { |
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296 | rval = ch; /* received ESC '[', so far */ |
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297 | } else { |
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298 | /* dump suppressed 'ESC'; outch will append the char */ |
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299 | videoPutChar( ESC ); |
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300 | } |
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301 | |
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302 | break; |
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303 | |
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304 | case '[': |
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305 | /* handle 'ESC' '[' sequences here */ |
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306 | ro = row; |
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307 | co = column; |
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308 | rval = DONE; /* done */ |
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309 | |
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310 | switch ( ch ) { |
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311 | case 'D': /* left */ |
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312 | |
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313 | if ( co > 0 ) |
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314 | co--; |
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315 | |
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316 | break; |
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317 | case 'C': /* right */ |
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318 | |
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319 | if ( co < maxCol ) |
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320 | co++; |
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321 | |
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322 | break; |
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323 | case 'A': /* up */ |
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324 | |
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325 | if ( ro > 0 ) |
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326 | ro--; |
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327 | |
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328 | break; |
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329 | case 'B': /* down */ |
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330 | |
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331 | if ( ro < maxRow ) |
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332 | ro++; |
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333 | |
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334 | break; |
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335 | case 'H': /* home */ |
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336 | ro = co = 0; |
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337 | break; |
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338 | case 'K': /* clear to end of line */ |
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339 | |
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340 | while ( column < maxCol - 1 ) |
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341 | videoPutChar( ' ' ); |
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342 | |
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343 | videoPutChar( BLANK ); |
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344 | break; |
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345 | case 'J': /* clear to end of screen */ |
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346 | |
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347 | while ( ( ( row < maxRow - 1 ) || ( column < maxCol - 1 ) ) ) |
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348 | videoPutChar( ' ' ); |
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349 | |
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350 | videoPutChar( BLANK ); |
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351 | break; |
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352 | default: |
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353 | videoPutChar( ESC ); |
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354 | videoPutChar( '[' ); |
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355 | /* DONT move the cursor */ |
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356 | ro = -1; |
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357 | rval = 0; |
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358 | break; |
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359 | } |
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360 | |
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361 | // /* reset cursor */ |
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362 | if ( ro >= 0 ) |
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363 | gotorc( ro, co ); |
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364 | |
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365 | default: |
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366 | break; |
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367 | } |
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368 | |
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369 | return rval; |
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370 | } |
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371 | |
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372 | static void clear_screen( void ) |
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373 | { |
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374 | int i, j; |
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375 | |
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376 | for ( j = 0; j < maxRow; j++ ) { |
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377 | for ( i = 0; i < maxCol; i++ ) { |
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378 | videoPutChar( ' ' ); |
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379 | } |
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380 | } |
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381 | |
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382 | column = 0; |
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383 | row = 0; |
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384 | } |
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385 | |
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386 | void rpi_fb_outch( char c ) |
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387 | { |
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388 | static int escaped = 0; |
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389 | |
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390 | if ( !( escaped = handleEscape( escaped, c ) ) ) { |
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391 | if ( '\n' == c ) |
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392 | videoPutChar( '\r' ); |
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393 | |
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394 | videoPutChar( c ); |
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395 | } |
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396 | } |
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397 | |
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398 | void rpi_video_init( void ) |
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399 | { |
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400 | int ret = rpi_fb_init(); |
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401 | |
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402 | if ( ( ret != RPI_FB_INIT_OK ) && |
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403 | ( ret != RPI_FB_INIT_ALREADY_INITIALIZED ) ) { |
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404 | rpi_video_initialized = 0; |
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405 | return; |
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406 | } |
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407 | |
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408 | struct fb_var_screeninfo fb_var_info; |
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409 | struct fb_fix_screeninfo fb_fix_info; |
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410 | rpi_get_var_screen_info( &fb_var_info ); |
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411 | rpi_get_fix_screen_info( &fb_fix_info ); |
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412 | maxCol = fb_var_info.xres / RPI_FONT_WIDTH; |
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413 | maxRow = fb_var_info.yres / RPI_FONT_HEIGHT; |
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414 | bytes_per_pixel = fb_var_info.bits_per_pixel / 8; |
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415 | bytes_per_line = bytes_per_pixel * fb_var_info.xres; |
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416 | bytes_per_char_line = RPI_FONT_HEIGHT * bytes_per_line; |
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417 | fb_mem = RTEMS_DEVOLATILE( void *, fb_fix_info.smem_start ); |
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418 | column = 0; |
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419 | row = 0; |
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420 | nLines = 0; |
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421 | fgx = ( CONSOLE_FG_COL << 24 ) | |
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422 | ( CONSOLE_FG_COL << 16 ) | |
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423 | ( CONSOLE_FG_COL << 8 ) | |
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424 | CONSOLE_FG_COL; |
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425 | bgx = ( CONSOLE_BG_COL << 24 ) | |
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426 | ( CONSOLE_BG_COL << 16 ) | |
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427 | ( CONSOLE_BG_COL << 8 ) | |
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428 | CONSOLE_BG_COL; |
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429 | eorx = fgx ^ bgx; |
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430 | clear_screen(); |
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431 | rpi_video_initialized = 1; |
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432 | } |
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433 | |
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434 | int rpi_video_is_initialized( void ) |
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435 | { |
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436 | return rpi_video_initialized; |
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437 | } |
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438 | |
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439 | /* for old DOS compatibility n-curses type of applications */ |
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440 | void gotoxy( |
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441 | int x, |
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442 | int y |
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443 | ); |
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444 | int whereX( void ); |
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445 | int whereY( void ); |
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446 | |
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447 | void gotoxy( |
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448 | int x, |
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449 | int y |
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450 | ) |
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451 | { |
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452 | gotorc( y, x ); |
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453 | } |
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454 | |
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455 | int whereX( void ) |
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456 | { |
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457 | return row; |
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458 | } |
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459 | |
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460 | int whereY( void ) |
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461 | { |
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462 | return column; |
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463 | } |
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