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1 /** |
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2 * GraphLCD plugin for the Video Disk Recorder |
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3 * |
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4 * tiff.c - tiff logo class |
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5 * |
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6 * (c) 2004 Andreas Brachold <vdr04 AT deltab de> |
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7 * (c) 2001-2004 Carsten Siebholz <c.siebholz AT t-online de> |
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8 **/ |
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9 |
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10 /*************************************************************************** |
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11 * * |
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12 * This program is free software; you can redistribute it and/or modify * |
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13 * it under the terms of the GNU General Public License as published by * |
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14 * the Free Software Foundation; either version 2 of the License, or * |
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15 * (at your option) any later version. * |
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16 * * |
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17 * This program is distributed in the hope that it will be useful, * |
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18 * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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20 * GNU General Public License for more details. * |
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21 * * |
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22 * You should have received a copy of the GNU General Public License * |
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23 * along with this program; * |
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24 * if not, write to the Free Software Foundation, Inc., * |
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25 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * |
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26 * * |
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27 ***************************************************************************/ |
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28 |
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29 #include <stdio.h> |
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30 #include <string.h> |
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31 |
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32 #include <string> |
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33 |
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34 #include <glcdgraphics/bitmap.h> |
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35 #include <glcdgraphics/image.h> |
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36 |
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37 #include "tiff.h" |
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38 |
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39 |
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40 #pragma pack(1) |
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41 typedef struct TIFFT{ |
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42 unsigned short tag; |
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43 unsigned short type; |
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44 unsigned long length; |
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45 /* 1 = BYTE. 8-bit unsigned integer. */ |
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46 /* 2 = ASCII. 8-bit bytes that store ASCII codes; the last byte must be null. */ |
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47 /* 3 = SHORT. A 16-bit (2-byte) unsigned integer. */ |
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48 /* 4 = LONG. A 32-bit (4-byte) unsigned integer. */ |
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49 /* 5 = RATIONAL. Two LONGs: the first represents the numerator of a fraction, the second the denominator. */ |
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50 unsigned long off_val; |
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51 } TIFFTAG; |
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52 #pragma pack() |
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53 |
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54 #define GETANDCHECK { t=fgetc(fIN);if(t==EOF) {fclose(fIN);return false;};} |
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55 |
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56 cTIFFFile::cTIFFFile() |
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57 { |
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58 } |
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59 |
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60 cTIFFFile::~cTIFFFile() |
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61 { |
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62 } |
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63 |
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64 bool cTIFFFile::Load(GLCD::cImage & image, const std::string & fileName) |
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65 { |
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66 FILE *fIN; |
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67 TIFFTAG tifftag; |
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68 unsigned int tiff_header, tiff_anztags, tiff_data; |
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69 unsigned char cl,ch,y,i; |
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70 unsigned char height, width, strip, invert; |
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71 unsigned char fLittleEndian=0; |
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72 int j; |
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73 int t; |
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74 unsigned char *bitmap = NULL; |
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75 bool bInvert = false; |
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76 |
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77 if (fileName.length() > 0) |
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78 { |
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79 fIN = fopen(fileName.c_str(), "rb"); |
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80 if (fIN) |
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81 { |
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82 // isyslog("graphlcd plugin: try to load logo %s.", szFileName); |
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83 if (fseek(fIN, 0, SEEK_SET)==EOF) |
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84 { |
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85 fclose(fIN); |
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86 return false; |
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87 } |
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88 GETANDCHECK; cl=(unsigned char)t; |
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89 GETANDCHECK; ch=(unsigned char)t; |
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90 if ((cl==0x49) && (ch==0x49)) |
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91 { |
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92 fLittleEndian=1; |
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93 } |
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94 |
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95 if (fseek(fIN, 4, SEEK_SET)==EOF) |
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96 { |
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97 fclose(fIN); |
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98 return false; |
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99 } |
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100 GETANDCHECK; cl=(unsigned char)t; |
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101 GETANDCHECK; ch=(unsigned char)t; |
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102 tiff_header = cl+256*ch; |
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103 //printf("tiff_header:%d %x\n", tiff_header, tiff_header); |
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104 |
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105 if (fseek(fIN, tiff_header, SEEK_SET)==EOF) |
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106 { |
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107 fclose(fIN); |
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108 return false; |
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109 } |
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110 |
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111 GETANDCHECK; cl=(unsigned char)t; |
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112 GETANDCHECK; ch=(unsigned char)t; |
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113 tiff_anztags = cl+256*ch; |
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114 //printf("tiff_anztags:%d %x\n", tiff_anztags, tiff_anztags); |
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115 |
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116 height=0; |
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117 width=0; |
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118 strip=0; |
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119 invert=0; |
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120 for (i=0; (i<tiff_anztags)&&(!height||!width||!strip||!invert); i++) |
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121 { |
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122 if (fread(&tifftag, sizeof(tifftag), 1, fIN)!=1) |
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123 { |
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124 fclose(fIN); |
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125 return false; |
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126 } |
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127 if (tifftag.tag==0x0100) width=tifftag.off_val; |
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128 if (tifftag.tag==0x0101) height=tifftag.off_val; |
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129 if (tifftag.tag==0x0111) strip=tifftag.off_val; |
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130 if (tifftag.tag==0x0106) invert=tifftag.off_val+1; |
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131 //printf("tag%d: %d %d %ld %ld\n", i,tifftag.tag, tifftag.type, tifftag.length, tifftag.off_val ); |
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132 } |
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133 |
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134 if (fseek(fIN,strip, SEEK_SET)==EOF) |
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135 { |
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136 fclose(fIN); |
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137 return false; |
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138 } |
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139 GETANDCHECK; cl=(unsigned char)t; |
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140 GETANDCHECK; ch=(unsigned char)t; |
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141 tiff_data = cl+256*ch; |
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142 //printf("tiff_data:%d %x\n", tiff_data, tiff_data); |
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143 |
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144 if (fseek(fIN, tiff_data, SEEK_SET)==EOF) |
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145 { |
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146 fclose(fIN); |
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147 return false; |
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148 } |
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149 |
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150 |
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151 image.Clear(); |
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152 image.SetWidth(width); |
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153 image.SetHeight(height); |
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154 image.SetDelay(100); |
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155 bitmap = new unsigned char[height * ((width + 7) / 8)]; |
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156 if (bitmap) |
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157 { |
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158 if (fread(bitmap, height*((width+7)/8), 1, fIN)!=1) |
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159 { |
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160 delete [] bitmap; |
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161 fclose(fIN); |
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162 image.Clear(); |
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163 return false; |
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164 } |
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165 |
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166 if (invert-1==1) bInvert = !bInvert; // 'Black is zero' |
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167 if (bInvert) |
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168 { |
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169 for (j=0; j < height * ((width+7)/8); j++) |
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170 { |
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171 (*(bitmap+j)) = (*(bitmap+j))^0xff; |
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172 } |
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173 } |
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174 |
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175 // cut the rest of the line |
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176 if (width%8) |
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177 { |
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178 for (y=1; y<=height; y++) { |
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179 j=y*((width+7)/8)-1; |
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180 (*(bitmap+j)) = ((*(bitmap+j))>>(8-width%8))<<(8-width%8); |
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181 } |
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182 } |
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183 image.AddBitmap(new GLCD::cBitmap(width, height, bitmap)); |
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184 } |
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185 else |
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186 { |
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187 fprintf(stderr, "ERROR: cannot allocate memory\n"); |
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188 } |
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189 fclose(fIN); |
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190 } |
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191 else |
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192 { |
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193 fprintf(stderr, "ERROR: cannot open picture %s\n", fileName.c_str()); |
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194 } |
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195 } |
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196 else |
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197 { |
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198 fprintf(stderr, "ERROR: no szFileName given!\n"); |
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199 } |
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200 return true; |
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201 } |