FreeCalypso > hg > freecalypso-hwlab
annotate lcdtest/showppm.c @ 158:65a2a96386cd
fc-uicc-tool: hex string parsing with min and max length,
matching fc-simtool
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 07 Feb 2021 04:00:27 +0000 |
parents | 1d8c499711f1 |
children |
rev | line source |
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lcdtest: PPM image display implemented
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1 #include <stdio.h> |
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2 #include <ctype.h> |
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3 #include <stdlib.h> |
19
f3671d3ad953
lcdtest: added cd command to avoid typing long pathnames for show
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17
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4 #include <unistd.h> |
17
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5 |
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6 char *ppm_filename; |
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7 FILE *ppmfile; |
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8 int ppm_is_ascii; /* P3 format instead of P6 */ |
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9 |
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10 /* |
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11 * This function reads one ASCII-encoded integer from a PPM file. |
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12 * It handles the white space and comment rules of the PPM format. |
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13 */ |
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14 static int |
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15 ppm_get_ascii_number() |
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16 { |
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17 int accum, c; |
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18 |
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19 do { |
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20 c = getc(ppmfile); |
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21 if (c < 0) { |
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22 badeof: fprintf(stderr, "%s: unexpected EOF\n", ppm_filename); |
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23 return(-1); |
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24 } |
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25 if (c == '#') { |
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26 do |
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27 c = getc(ppmfile); |
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28 while (c >= 0 && c != '\n'); |
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29 if (c != '\n') |
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30 goto badeof; |
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31 } |
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32 } while (isspace(c)); |
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33 if (!isdigit(c)) { |
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34 fprintf(stderr, |
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35 "%s: unexpected data where a number was expected\n", |
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36 ppm_filename); |
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37 return(-1); |
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38 } |
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39 for (accum = c - '0'; ; ) { |
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40 c = getc(ppmfile); |
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41 if (c < 0 || isspace(c)) |
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42 break; |
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43 if (!isdigit(c)) { |
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44 fprintf(stderr, |
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45 "%s: bad character in the middle of a number\n", |
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46 ppm_filename); |
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47 return(-1); |
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48 } |
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49 accum = accum * 10 + c - '0'; |
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50 } |
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51 return accum; |
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52 } |
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53 |
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54 /* |
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55 * This function reads and parses the PPM header of our input file. |
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56 */ |
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57 static int |
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58 ppm_read_header() |
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59 { |
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60 int magic1, magic2; |
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61 int rd; |
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62 |
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63 magic1 = getc(ppmfile); |
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64 magic2 = getc(ppmfile); |
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65 if (magic1 == 'P' && magic2 == '3') |
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66 ppm_is_ascii = 1; |
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67 else if (magic1 == 'P' && magic2 == '6') |
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68 ppm_is_ascii = 0; |
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69 else { |
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70 fprintf(stderr, "%s: P3 or P6 format expected\n", ppm_filename); |
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71 return(-1); |
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72 } |
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73 rd = ppm_get_ascii_number(); |
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74 if (rd < 0) |
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75 return(-1); |
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76 if (rd != 176) { |
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77 fprintf(stderr, "%s: width is not 176\n", ppm_filename); |
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78 return(-1); |
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79 } |
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80 rd = ppm_get_ascii_number(); |
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81 if (rd < 0) |
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82 return(-1); |
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83 if (rd != 220) { |
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84 fprintf(stderr, "%s: height is not 220\n", ppm_filename); |
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85 return(-1); |
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86 } |
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87 rd = ppm_get_ascii_number(); |
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88 if (rd < 0) |
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89 return(-1); |
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90 if (rd != 255) { |
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91 fprintf(stderr, "%s: maxval is not 255\n", ppm_filename); |
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92 return(-1); |
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93 } |
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94 return(0); |
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95 } |
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96 |
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97 /* |
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98 * This function reads a single R, G or B value from a PPM file. |
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99 */ |
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100 static int |
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101 ppm_get_pixval() |
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102 { |
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103 int c; |
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104 |
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105 if (ppm_is_ascii) |
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106 return ppm_get_ascii_number(); |
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107 c = getc(ppmfile); |
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108 if (c < 0) { |
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109 fprintf(stderr, "%s: EOF while reading binary pixel data\n", |
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110 ppm_filename); |
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111 return(-1); |
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112 } |
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113 return c; |
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114 } |
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115 |
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116 static int |
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117 ppm_get_rgb() |
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118 { |
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119 int r, g, b; |
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120 |
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121 r = ppm_get_pixval(); |
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122 if (r < 0) |
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123 return(-1); |
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124 g = ppm_get_pixval(); |
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125 if (g < 0) |
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126 return(-1); |
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127 b = ppm_get_pixval(); |
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128 if (b < 0) |
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129 return(-1); |
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130 /* convert to 5:6:5 */ |
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131 r >>= 3; |
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132 g >>= 2; |
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133 b >>= 3; |
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134 return (r << 11) | (g << 5) | b; |
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135 } |
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136 |
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137 cmd_show(argc, argv) |
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138 char **argv; |
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139 { |
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140 int rc; |
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141 unsigned n; |
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142 u_char ftbuf[176*220*6+3], *dp; |
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143 |
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144 ppm_filename = argv[1]; |
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145 ppmfile = fopen(ppm_filename, "r"); |
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146 if (!ppmfile) { |
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147 perror(ppm_filename); |
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148 return(-1); |
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149 } |
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150 rc = ppm_read_header(); |
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151 if (rc < 0) { |
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152 fclose(ppmfile); |
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153 return(-1); |
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154 } |
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155 write_ir(0x20); |
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156 write_dr(0); |
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157 write_ir(0x21); |
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158 write_dr(0); |
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159 write_ir(0x22); |
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160 /* GPIO setup */ |
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161 dp = ftbuf; |
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162 *dp++ = 0x82; |
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163 *dp++ = 0x03; |
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164 *dp++ = 0x03; |
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165 for (n = 0; n < 176*220; n++) { |
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166 rc = ppm_get_rgb(); |
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167 if (rc < 0) { |
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168 fclose(ppmfile); |
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169 return(-1); |
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170 } |
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171 /* upper byte */ |
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172 *dp++ = 0x92; |
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173 *dp++ = 0; /* dummy addr */ |
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174 *dp++ = rc >> 8; |
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175 /* lower byte */ |
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176 *dp++ = 0x92; |
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177 *dp++ = 0; /* dummy addr */ |
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178 *dp++ = rc; |
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179 } |
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180 fclose(ppmfile); |
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181 do_ftdi_write(ftbuf, sizeof ftbuf); |
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182 return(0); |
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183 } |
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184 |
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185 cmd_cd(argc, argv) |
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186 char **argv; |
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187 { |
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188 if (chdir(argv[1]) < 0) { |
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189 perror(argv[1]); |
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190 return(-1); |
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191 } |
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192 return(0); |
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193 } |