Annotation of parser3/src/classes/image.C, revision 1.143
1.1 paf 1: /** @file
2: Parser: @b image parser class.
3:
1.139 moko 4: Copyright (c) 2001-2012 Art. Lebedev Studio (http://www.artlebedev.com)
1.66 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.73 paf 6: */
1.1 paf 7:
1.31 parser 8: /*
9: jpegsize: gets the width and height (in pixels) of a jpeg file
10: Andrew Tong, werdna@ugcs.caltech.edu February 14, 1995
11: modified slightly by alex@ed.ac.uk
12: and further still by rjray@uswest.com
13: optimization and general re-write from tmetro@vl.com
14: from perl by paf@design.ru
1.1 paf 15: */
16:
17: #include "pa_config_includes.h"
1.139 moko 18: #include "gif.h"
1.1 paf 19:
1.91 paf 20: #include "pa_vmethod_frame.h"
1.1 paf 21: #include "pa_common.h"
22: #include "pa_request.h"
23: #include "pa_vfile.h"
24: #include "pa_vimage.h"
1.89 paf 25: #include "pa_vdate.h"
1.91 paf 26: #include "pa_table.h"
1.1 paf 27:
1.143 ! moko 28: volatile const char * IDENT_IMAGE_C="$Id: image.C,v 1.142 2012-06-15 11:54:18 moko Exp $";
1.139 moko 29:
1.125 misha 30: // defines
31:
1.126 misha 32: static const String spacebar_width_name("space");
33: static const String monospace_width_name("width");
34: static const String letter_spacing_name("spacing");
1.125 misha 35:
1.22 paf 36: // class
37:
1.91 paf 38: class MImage: public Methoded {
1.22 paf 39: public: // VStateless_class
1.130 misha 40: Value* create_new_value(Pool&) { return new VImage(); }
1.22 paf 41:
42: public:
1.91 paf 43: MImage();
1.22 paf 44: };
1.1 paf 45:
1.91 paf 46: // globals
47:
48: DECLARE_CLASS_VAR(image, new MImage, 0);
49:
1.1 paf 50: // helpers
51:
1.118 misha 52: #define EXIF_TAG(tag, name) put(tag, #name);
53:
1.91 paf 54: /// value of exif tag -> it's value
55: class EXIF_tag_value2name: public Hash<int, const char*> {
56: public:
57: EXIF_tag_value2name() {
58: // image JPEG Exif
59: // Tags used by IFD0 (main image)
60: EXIF_TAG(0x010e, ImageDescription);
61: EXIF_TAG(0x010f, Make);
62: EXIF_TAG(0x0110, Model);
63: EXIF_TAG(0x0112, Orientation);
64: EXIF_TAG(0x011a, XResolution);
65: EXIF_TAG(0x011b, YResolution);
66: EXIF_TAG(0x0128, ResolutionUnit);
67: EXIF_TAG(0x0131, Software);
68: EXIF_TAG(0x0132, DateTime);
69: EXIF_TAG(0x013e, WhitePoint);
70: EXIF_TAG(0x013f, PrimaryChromaticities);
71: EXIF_TAG(0x0211, YCbCrCoefficients);
72: EXIF_TAG(0x0213, YCbCrPositioning);
73: EXIF_TAG(0x0214, ReferenceBlackWhite);
74: EXIF_TAG(0x8298, Copyright);
75: EXIF_TAG(0x8769, ExifOffset);
76: // Tags used by Exif SubIFD
77: EXIF_TAG(0x829a, ExposureTime);
78: EXIF_TAG(0x829d, FNumber);
79: EXIF_TAG(0x8822, ExposureProgram);
80: EXIF_TAG(0x8827, ISOSpeedRatings);
81: EXIF_TAG(0x9000, ExifVersion);
82: EXIF_TAG(0x9003, DateTimeOriginal);
83: EXIF_TAG(0x9004, DateTimeDigitized);
84: EXIF_TAG(0x9101, ComponentsConfiguration);
85: EXIF_TAG(0x9102, CompressedBitsPerPixel);
86: EXIF_TAG(0x9201, ShutterSpeedValue);
87: EXIF_TAG(0x9202, ApertureValue);
88: EXIF_TAG(0x9203, BrightnessValue);
89: EXIF_TAG(0x9204, ExposureBiasValue);
90: EXIF_TAG(0x9205, MaxApertureValue);
91: EXIF_TAG(0x9206, SubjectDistance);
92: EXIF_TAG(0x9207, MeteringMode);
93: EXIF_TAG(0x9208, LightSource);
94: EXIF_TAG(0x9209, Flash);
95: EXIF_TAG(0x920a, FocalLength);
96: EXIF_TAG(0x927c, MakerNote);
97: EXIF_TAG(0x9286, UserComment);
98: EXIF_TAG(0x9290, SubsecTime);
99: EXIF_TAG(0x9291, SubsecTimeOriginal);
100: EXIF_TAG(0x9292, SubsecTimeDigitized);
101: EXIF_TAG(0xa000, FlashPixVersion);
102: EXIF_TAG(0xa001, ColorSpace);
103: EXIF_TAG(0xa002, ExifImageWidth);
104: EXIF_TAG(0xa003, ExifImageHeight);
105: EXIF_TAG(0xa004, RelatedSoundFile);
106: EXIF_TAG(0xa005, ExifInteroperabilityOffset);
107: EXIF_TAG(0xa20e, FocalPlaneXResolution);
108: EXIF_TAG(0xa20f, FocalPlaneYResolution);
109: EXIF_TAG(0xa210, FocalPlaneResolutionUnit);
110: EXIF_TAG(0xa215, ExposureIndex);
111: EXIF_TAG(0xa217, SensingMethod);
112: EXIF_TAG(0xa300, FileSource);
113: EXIF_TAG(0xa301, SceneType);
114: EXIF_TAG(0xa302, CFAPattern);
115: // Misc Tags
116: EXIF_TAG(0x00fe, NewSubfileType);
117: EXIF_TAG(0x00ff, SubfileType);
118: EXIF_TAG(0x012d, TransferFunction);
119: EXIF_TAG(0x013b, Artist);
120: EXIF_TAG(0x013d, Predictor);
121: EXIF_TAG(0x0142, TileWidth);
122: EXIF_TAG(0x0143, TileLength);
123: EXIF_TAG(0x0144, TileOffsets);
124: EXIF_TAG(0x0145, TileByteCounts);
125: EXIF_TAG(0x014a, SubIFDs);
126: EXIF_TAG(0x015b, JPEGTables);
127: EXIF_TAG(0x828d, CFARepeatPatternDim);
128: EXIF_TAG(0x828e, CFAPattern);
129: EXIF_TAG(0x828f, BatteryLevel);
130: EXIF_TAG(0x83bb, IPTC/NAA);
131: EXIF_TAG(0x8773, InterColorProfile);
132: EXIF_TAG(0x8824, SpectralSensitivity);
1.118 misha 133: //EXIF_TAG(0x8825, GPSInfo);
1.91 paf 134: EXIF_TAG(0x8828, OECF);
135: EXIF_TAG(0x8829, Interlace);
136: EXIF_TAG(0x882a, TimeZoneOffset);
137: EXIF_TAG(0x882b, SelfTimerMode);
138: EXIF_TAG(0x920b, FlashEnergy);
139: EXIF_TAG(0x920c, SpatialFrequencyResponse);
140: EXIF_TAG(0x920d, Noise);
141: EXIF_TAG(0x9211, ImageNumber);
142: EXIF_TAG(0x9212, SecurityClassification);
143: EXIF_TAG(0x9213, ImageHistory);
144: EXIF_TAG(0x9214, SubjectLocation);
145: EXIF_TAG(0x9215, ExposureIndex);
146: EXIF_TAG(0x9216, TIFF/EPStandardID);
147: EXIF_TAG(0xa20b, FlashEnergy);
148: EXIF_TAG(0xa20c, SpatialFrequencyResponse);
149: EXIF_TAG(0xa214, SubjectLocation);
1.118 misha 150:
151: // additional things added by misha@
152: EXIF_TAG(0x0100, ImageWidth);
153: EXIF_TAG(0x0101, ImageLength);
154: EXIF_TAG(0x0102, BitsPerSample);
155: EXIF_TAG(0x0103, Compression);
156: EXIF_TAG(0x0106, PhotometricInterpretation);
157: EXIF_TAG(0x010a, FillOrder);
158: EXIF_TAG(0x010d, DocumentName);
159: EXIF_TAG(0x0111, StripOffsets);
160: EXIF_TAG(0x0115, SamplesPerPixel);
161: EXIF_TAG(0x0116, RowsPerStrip);
162: EXIF_TAG(0x0117, StripByteCounts);
163: EXIF_TAG(0x011c, PlanarConfiguration);
164: EXIF_TAG(0x0156, TransferRange);
165: EXIF_TAG(0x0200, JPEGProc);
166: EXIF_TAG(0x0201, JPEGInterchangeFormat);
167: EXIF_TAG(0x0202, JPEGInterchangeFormatLength);
168: EXIF_TAG(0x0212, YCbCrSubSampling);
169: EXIF_TAG(0xa401, CustomRendered);
170: EXIF_TAG(0xa402, ExposureMode);
171: EXIF_TAG(0xa403, WhiteBalance);
172: EXIF_TAG(0xa404, DigitalZoomRatio);
173: EXIF_TAG(0xa405, FocalLengthIn35mmFilm);
174: EXIF_TAG(0xa406, SceneCaptureType);
175: EXIF_TAG(0xa407, GainControl);
176: EXIF_TAG(0xa408, Contrast);
177: EXIF_TAG(0xa409, Saturation);
178: EXIF_TAG(0xa40a, Sharpness);
179: EXIF_TAG(0xa40b, DeviceSettingDescription);
180: EXIF_TAG(0xa40c, SubjectDistanceRange);
181: EXIF_TAG(0xa420, ImageUniqueID);
1.91 paf 182: }
183: } exif_tag_value2name;
184:
1.118 misha 185: class EXIF_gps_tag_value2name: public Hash<int, const char*> {
186: public:
187: EXIF_gps_tag_value2name() {
188: EXIF_TAG(0x0, GPSVersionID);
189: EXIF_TAG(0x1, GPSLatitudeRef);
190: EXIF_TAG(0x2, GPSLatitude);
191: EXIF_TAG(0x3, GPSLongitudeRef);
192: EXIF_TAG(0x4, GPSLongitude);
193: EXIF_TAG(0x5, GPSAltitudeRef);
194: EXIF_TAG(0x6, GPSAltitude);
195: EXIF_TAG(0x7, GPSTimeStamp);
196: EXIF_TAG(0x8, GPSSatellites);
197: EXIF_TAG(0x9, GPSStatus);
198: EXIF_TAG(0xA, GPSMeasureMode);
199: EXIF_TAG(0xB, GPSDOP);
200: EXIF_TAG(0xC, GPSSpeedRef);
201: EXIF_TAG(0xD, GPSSpeed);
202: EXIF_TAG(0xE, GPSTrackRef);
203: EXIF_TAG(0xF, GPSTrack);
204: EXIF_TAG(0x10, GPSImgDirectionRef);
205: EXIF_TAG(0x11, GPSImgDirection);
206: EXIF_TAG(0x12, GPSMapDatum);
207: EXIF_TAG(0x13, GPSDestLatitudeRef);
208: EXIF_TAG(0x14, GPSDestLatitude);
209: EXIF_TAG(0x15, GPSDestLongitudeRef);
210: EXIF_TAG(0x16, GPSDestLongitude);
211: EXIF_TAG(0x17, GPSDestBearingRef);
212: EXIF_TAG(0x18, GPSDestBearing);
213: EXIF_TAG(0x19, GPSDestDistanceRef);
214: EXIF_TAG(0x1A, GPSDestDistance);
215: EXIF_TAG(0x1B, GPSProcessingMethod);
216: EXIF_TAG(0x1C, GPSAreaInformation);
217: EXIF_TAG(0x1D, GPSDateStamp);
218: EXIF_TAG(0x1E, GPSDifferential);
219: }
220: } exif_gps_tag_value2name;
221:
222: #undef EXIF_TAG
1.91 paf 223:
1.43 parser 224: #ifndef DOXYGEN
1.1 paf 225: class Measure_reader {
226: public:
1.91 paf 227: virtual size_t read(const char* &buf, size_t limit)=0;
1.79 paf 228: virtual void seek(long value, int whence)=0;
229: virtual long tell()=0;
1.77 paf 230: };
1.1 paf 231:
1.77 paf 232: class Measure_file_reader: public Measure_reader {
1.91 paf 233: const String& file_name; const char* fname;
234: int f;
235:
1.77 paf 236: public:
1.91 paf 237: Measure_file_reader(int af, const String& afile_name, const char* afname):
238: file_name(afile_name), fname(afname), f(af) {
1.1 paf 239: }
240:
1.91 paf 241: override size_t read(const char* &abuf, size_t limit) {
1.77 paf 242: if(limit==0)
1.1 paf 243: return 0;
1.77 paf 244:
1.91 paf 245: char* lbuf=new(PointerFreeGC) char[limit];
1.143 ! moko 246: ssize_t read_size=::read(f, lbuf, limit); abuf=lbuf;
! 247: if(read_size<0)
! 248: throw Exception(0, &file_name, "measure read failed: %s (%d)", strerror(errno), errno);
1.1 paf 249: return read_size;
250: }
251:
1.91 paf 252: override void seek(long value, int whence) {
1.79 paf 253: if(lseek(f, value, whence)<0)
1.118 misha 254: throw Exception(IMAGE_FORMAT,
1.77 paf 255: &file_name,
1.79 paf 256: "seek(value=%ld, whence=%d) failed: %s (%d), actual filename '%s'",
257: value, whence, strerror(errno), errno, fname);
1.77 paf 258: }
259:
1.91 paf 260: override long tell() { return lseek(f, 0, SEEK_CUR); }
1.79 paf 261:
1.77 paf 262: };
263:
264: class Measure_buf_reader: public Measure_reader {
1.91 paf 265:
266: const char* buf; size_t size;
267: const String& file_name;
268:
269: size_t offset;
270:
1.77 paf 271: public:
1.91 paf 272: Measure_buf_reader(const char* abuf, size_t asize, const String& afile_name):
1.77 paf 273: buf(abuf), size(asize), file_name(afile_name), offset(0) {
274: }
275:
1.91 paf 276: override size_t read(const char* &abuf, size_t limit) {
1.77 paf 277: size_t to_read=min(limit, size-offset);
1.91 paf 278: abuf=buf+offset;
1.77 paf 279: offset+=to_read;
280: return to_read;
281: }
282:
1.91 paf 283: override void seek(long value, int whence) {
1.79 paf 284: size_t new_offset;
285: switch(whence) {
286: case SEEK_CUR: new_offset=offset+value; break;
287: case SEEK_SET: new_offset=(size_t)value; break;
1.91 paf 288: default:
289: throw Exception(0,
290: 0,
291: "whence #%d not supported", 0, whence);
292: break; // never
1.79 paf 293: }
294:
1.77 paf 295: if((ssize_t)new_offset<0 || new_offset>size)
1.118 misha 296: throw Exception(IMAGE_FORMAT,
1.77 paf 297: &file_name,
1.79 paf 298: "seek(value=%l, whence=%d) failed: out of buffer, new_offset>size (%l>%l) or new_offset<0",
299: value, whence, new_offset, size);
1.77 paf 300: offset=new_offset;
301: }
302:
1.91 paf 303: override long tell() { return offset; }
1.79 paf 304:
1.1 paf 305: };
1.77 paf 306:
1.43 parser 307: #endif
1.1 paf 308:
1.72 paf 309: /// PNG file header
310: struct PNG_Header {
311: char dummy[12];
312: char signature[4]; //< must be "IHDR"
1.80 paf 313: uchar high_width[2]; //< image width high bytes [we ignore for now]
314: uchar width[2]; //< image width low bytes
315: uchar high_height[2]; //< image height high bytes [we ignore for now]
316: uchar height[4]; //< image height
1.72 paf 317: };
318:
1.21 paf 319: /// GIF file header
1.1 paf 320: struct GIF_Header {
1.72 paf 321: char signature[3]; // 'GIF'
1.1 paf 322: char version[3];
1.80 paf 323: uchar width[2];
324: uchar height[2];
1.1 paf 325: char dif;
326: char fonColor;
327: char nulls;
328: };
329:
1.31 parser 330: /// JPEG record head
331: struct JPG_Segment_head {
1.80 paf 332: uchar marker;
333: uchar code;
334: uchar length[2];
1.1 paf 335: };
1.21 paf 336: /// JPEG frame header
1.31 parser 337: struct JPG_Size_segment_body {
1.27 parser 338: char data; //< data precision of bits/sample
1.80 paf 339: uchar height[2]; //< image height
340: uchar width[2]; //< image width
1.27 parser 341: char numComponents; //< number of color components
1.1 paf 342: };
343:
1.79 paf 344: /// JPEG frame header
1.91 paf 345: struct JPG_Exif_segment_begin {
1.79 paf 346: char signature[6]; // Exif\0\0
347: };
348:
1.80 paf 349: /// JPEG Exif TIFF Header
350: struct JPG_Exif_TIFF_header {
351: uchar byte_align_identifier[2];
352: char dummy[2]; // always 000A [or 0A00]
353: uchar first_IFD_offset[4]; // Usually the first IFD starts immediately next to TIFF header, so this offset has value '0x00000008'.
354: };
355:
356: // JPEG Exif IFD start
1.91 paf 357: struct JPG_Exif_IFD_begin {
1.80 paf 358: uchar directory_entry_count[2]; // the number of directory entry contains in this IFD
359: };
360:
361: // TTTT ffff NNNNNNNN DDDDDDDD
362: struct JPG_Exif_IFD_entry {
363: uchar tag[2]; // Tag number, this shows a kind of data
364: uchar format[2]; // data format
365: uchar components_count[4]; // number of components
366: uchar value_or_offset_to_it[4]; // data value or offset to data value
367: };
368:
369: #define JPG_IFD_TAG_EXIF_OFFSET 0x8769
370:
1.118 misha 371: #define JPG_IFD_TAG_EXIF_GPS_OFFSET 0x8825
372:
1.89 paf 373: #define JPEG_EXIF_DATE_CHARS 20
374:
1.1 paf 375: //
376:
1.80 paf 377: inline ushort x_endian_to_ushort(uchar b0, uchar b1) {
378: return (ushort)((b1<<8) + b0);
1.33 parser 379: }
380:
1.80 paf 381: inline uint x_endian_to_uint(uchar b0, uchar b1, uchar b2, uchar b3) {
382: return (uint)(((((b3<<8) + b2)<<8)+b1)<<8)+b0;
1.33 parser 383: }
384:
1.80 paf 385: inline ushort endian_to_ushort(bool is_big, const uchar *b/* [2] */) {
386: return is_big?x_endian_to_ushort(b[1], b[0]):
387: x_endian_to_ushort(b[0], b[1]);
1.1 paf 388: }
389:
1.80 paf 390: inline uint endian_to_uint(bool is_big, const uchar *b /* [4] */) {
391: return is_big?x_endian_to_uint(b[3], b[2], b[1], b[0]):
392: x_endian_to_uint(b[0], b[1], b[2], b[3]);
393: }
394:
1.91 paf 395: static void measure_gif(const String& origin_string,
1.78 paf 396: Measure_reader& reader, ushort& width, ushort& height) {
1.1 paf 397:
1.91 paf 398: const char* buf;
1.102 paf 399: const size_t head_size=sizeof(GIF_Header);
400: if(reader.read(buf, head_size)<head_size)
1.118 misha 401: throw Exception(IMAGE_FORMAT,
1.91 paf 402: &origin_string,
1.34 parser 403: "not GIF file - too small");
1.31 parser 404: GIF_Header *head=(GIF_Header *)buf;
1.1 paf 405:
1.72 paf 406: if(strncmp(head->signature, "GIF", 3)!=0)
1.118 misha 407: throw Exception(IMAGE_FORMAT,
1.91 paf 408: &origin_string,
1.44 parser 409: "not GIF file - wrong signature");
1.1 paf 410:
1.80 paf 411: width=endian_to_ushort(false, head->width);
412: height=endian_to_ushort(false, head->height);
413: }
414:
1.91 paf 415: static Value* parse_IFD_entry_formatted_one_value(
1.80 paf 416: bool is_big,
417: ushort format,
418: size_t component_size,
419: const uchar *value) {
420: switch(format) {
421: case 1: // unsigned byte
1.91 paf 422: return new VInt((uchar)value[0]);
1.80 paf 423: case 3: // unsigned short
1.91 paf 424: return new VInt(endian_to_ushort(is_big, value));
1.80 paf 425: case 4: // unsigned long
426: // 'double' because parser's Int is signed
1.91 paf 427: return new VDouble(endian_to_uint(is_big, value));
1.80 paf 428: case 5: // unsigned rational
429: {
430: uint numerator=endian_to_uint(is_big, value); value+=component_size/2;
431: uint denominator=endian_to_uint(is_big, value);
432: if(!denominator)
433: return 0;
1.91 paf 434: return new VDouble(((double)numerator)/denominator);
1.80 paf 435: }
436: case 6: // signed byte
1.91 paf 437: return new VInt((signed char)value[0]);
1.80 paf 438: case 8: // signed short
1.91 paf 439: return new VInt((signed short)endian_to_ushort(is_big, value));
1.80 paf 440: case 9: // signed long
1.91 paf 441: return new VInt((signed int)endian_to_uint(is_big, value));
1.80 paf 442: case 10: // signed rational
443: {
444: signed int numerator=(signed int)endian_to_uint(is_big, value); value+=component_size/2;
445: uint denominator=endian_to_uint(is_big, value);
446: if(!denominator)
447: return 0;
1.91 paf 448: return new VDouble(numerator/denominator);
1.80 paf 449: }
450: /*
451: case 11: // single float
1.120 misha 452: @todo
1.80 paf 453: case 12: // double float
1.120 misha 454: @todo
1.80 paf 455: */
456: };
457:
458: return 0;
459: }
460:
1.89 paf 461: // date.C
1.107 paf 462: tm cstr_to_time_t(char *cstr);
1.89 paf 463:
1.91 paf 464: static Value* parse_IFD_entry_formatted_value(bool is_big, ushort format,
465: size_t component_size, uint components_count,
466: const uchar *value) {
1.80 paf 467: if(format==2) { // ascii string, exception: the only type with varying size
1.91 paf 468: const char* cstr=(const char* )value;
469: size_t length=components_count;
1.89 paf 470: // Data format is "YYYY:MM:DD HH:MM:SS"+0x00, total 20bytes
1.91 paf 471: if(length==JPEG_EXIF_DATE_CHARS
1.111 paf 472: && isdigit((unsigned char)cstr[0])
1.91 paf 473: && cstr[length-1]==0) {
1.89 paf 474: char cstr_writable[JPEG_EXIF_DATE_CHARS];
475: strcpy(cstr_writable, cstr);
476:
1.106 paf 477: try {
478: return new VDate(cstr_to_time_t(cstr_writable));
479: }
480: catch(...) { /*ignore bad date times*/ }
1.89 paf 481: }
482:
1.123 misha 483: return new VString(*new String(cstr, String::L_TAINTED));
1.80 paf 484: }
485:
486: if(components_count==1)
1.91 paf 487: return parse_IFD_entry_formatted_one_value(is_big, format, component_size, value);
1.80 paf 488:
1.91 paf 489: VHash* result=new VHash;
490: HashStringValue& hash=result->hash();
1.80 paf 491: for(uint i=0; i<components_count; i++, value+=component_size) {
1.91 paf 492: hash.put(
1.93 paf 493: String::Body::Format(i),
1.91 paf 494: parse_IFD_entry_formatted_one_value(is_big, format, component_size, value));
1.80 paf 495: }
496:
1.91 paf 497: return result;
1.80 paf 498: }
499:
1.91 paf 500: static Value* parse_IFD_entry_value(
1.80 paf 501: bool is_big, Measure_reader& reader, long tiff_base,
502: JPG_Exif_IFD_entry& entry) {
503: size_t format2component_size[]={
504: 0, // undefined
505: 1, // unsigned byte
506: 1, // ascii string
507: 2, // unsigned short
508: 4, // unsigned long
509: 8, // unsigned rational
510: 1, // signed byte
511: 0, // undefined
512: 2, // signed short
513: 4, // signed long
514: 8, // signed rational
515: /*
516: 4, // single float
517: 8, // double float
518: */
519: };
520:
521: ushort format=endian_to_ushort(is_big, entry.format);
522: if(format>=sizeof(format2component_size)/sizeof(format2component_size[0]))
523: return 0; // format out of range, ignoring
524:
525: size_t component_size=format2component_size[format];
526: if(component_size==0)
527: return 0; // undefined format
528:
529: // You can get the total data byte length by multiplies
530: // a 'bytes/components' value (see above chart) by number of components stored 'NNNNNNNN' area
531: uint components_count=endian_to_uint(is_big, entry.components_count);
1.121 misha 532: uint value_size=component_size*components_count;
1.80 paf 533: // If its size is over 4bytes, 'DDDDDDDD' contains the offset to data stored address
1.91 paf 534: Value* result;
1.80 paf 535:
536: if(value_size<=4)
1.91 paf 537: result=parse_IFD_entry_formatted_value(
1.80 paf 538: is_big, format,
539: component_size, components_count,
540: entry.value_or_offset_to_it);
541: else {
542: long remembered=reader.tell();
543: {
544: reader.seek(tiff_base+endian_to_uint(is_big, entry.value_or_offset_to_it), SEEK_SET);
1.91 paf 545: const char* value;
1.80 paf 546: if(reader.read(value, value_size)<sizeof(value_size))
547: return 0;
1.91 paf 548: result=parse_IFD_entry_formatted_value(
1.80 paf 549: is_big, format,
550: component_size, components_count,
551: (const uchar*)value);
552: }
553: reader.seek(remembered, SEEK_SET);
554: }
555:
556: return result;
557: }
558:
1.91 paf 559: static void parse_IFD(HashStringValue& hash,
1.118 misha 560: bool is_big, Measure_reader& reader, long tiff_base, bool gps=false);
1.91 paf 561:
562: static void parse_IFD_entry(HashStringValue& hash,
563: bool is_big, Measure_reader& reader, long tiff_base,
1.118 misha 564: JPG_Exif_IFD_entry& entry, bool gps=false) {
1.80 paf 565: ushort tag=endian_to_ushort(is_big, entry.tag);
1.118 misha 566:
567: if(tag==JPG_IFD_TAG_EXIF_OFFSET || tag==JPG_IFD_TAG_EXIF_GPS_OFFSET){
1.80 paf 568: long remembered=reader.tell();
569: {
570: reader.seek(tiff_base+endian_to_uint(is_big, entry.value_or_offset_to_it), SEEK_SET);
1.118 misha 571: parse_IFD(hash, is_big, reader, tiff_base, (tag==JPG_IFD_TAG_EXIF_GPS_OFFSET)?true:gps);
1.80 paf 572: }
573: reader.seek(remembered, SEEK_SET);
574: return;
575: }
1.118 misha 576:
1.91 paf 577: if(Value* value=parse_IFD_entry_value(is_big, reader, tiff_base, entry)) {
1.118 misha 578: if(const char* name=(gps)?exif_gps_tag_value2name.get(tag):exif_tag_value2name.get(tag))
1.93 paf 579: hash.put(String::Body(name), value);
1.80 paf 580: else
1.93 paf 581: hash.put(String::Body::Format(tag), value);
1.80 paf 582: }
1.1 paf 583: }
584:
1.91 paf 585: static void parse_IFD(
586: HashStringValue& hash,
1.118 misha 587: bool is_big, Measure_reader& reader, long tiff_base, bool gps) {
1.91 paf 588: const char* buf;
589: if(reader.read(buf, sizeof(JPG_Exif_IFD_begin))<sizeof(JPG_Exif_IFD_begin))
1.80 paf 590: return;
1.91 paf 591: JPG_Exif_IFD_begin *start=(JPG_Exif_IFD_begin *)buf;
1.80 paf 592:
593: ushort directory_entry_count=endian_to_ushort(is_big, start->directory_entry_count);
594: for(int i=0; i<directory_entry_count; i++) {
595: if(reader.read(buf, sizeof(JPG_Exif_IFD_entry))<sizeof(JPG_Exif_IFD_entry))
596: return;
597:
1.118 misha 598: parse_IFD_entry(hash, is_big, reader, tiff_base, *(JPG_Exif_IFD_entry *)buf, gps);
1.80 paf 599: }
600: // then goes: LLLLLLLL Offset to next IFD [not going there]
601: }
602:
1.91 paf 603: static Value* parse_exif(Measure_reader& reader, const String& origin_string) {
604: const char* buf;
605: if(reader.read(buf, sizeof(JPG_Exif_segment_begin))<sizeof(JPG_Exif_segment_begin))
1.118 misha 606: throw Exception(IMAGE_FORMAT,
1.91 paf 607: &origin_string,
1.80 paf 608: "not JPEG file - can not fully read Exif segment start");
609:
1.91 paf 610: JPG_Exif_segment_begin *start=(JPG_Exif_segment_begin *)buf;
1.80 paf 611: if(memcmp(start->signature, "Exif\0\0", 4+2)!=0) //signature invalid?
612: return 0; // ignore invalid block
613:
614: uint tiff_base=reader.tell();
615: if(reader.read(buf, sizeof(JPG_Exif_TIFF_header))<sizeof(JPG_Exif_TIFF_header))
616: return 0;
617:
618: JPG_Exif_TIFF_header *head=(JPG_Exif_TIFF_header *)buf;
619: bool is_big=head->byte_align_identifier[0]=='M'; // [M]otorola vs [I]ntel
620:
621: uint first_IFD_offset=endian_to_uint(is_big, head->first_IFD_offset);
622: reader.seek(tiff_base+first_IFD_offset, SEEK_SET);
623:
1.91 paf 624: VHash* vhash=new VHash;
1.80 paf 625:
626: // IFD
1.91 paf 627: parse_IFD(vhash->hash(), is_big, reader, tiff_base);
1.80 paf 628:
1.91 paf 629: return vhash;
1.80 paf 630: }
631:
1.91 paf 632: static void measure_jpeg(const String& origin_string,
633: Measure_reader& reader, ushort& width, ushort& height, Value** exif) {
1.2 paf 634: // JFIF format markers
1.80 paf 635: const uchar MARKER=0xFF;
636: const uchar CODE_SIZE_A=0xC0;
637: const uchar CODE_SIZE_B=0xC1;
638: const uchar CODE_SIZE_C=0xC2;
639: const uchar CODE_SIZE_D=0xC3;
640: const uchar CODE_EXIF=0xE1;
1.2 paf 641:
1.91 paf 642: const char* buf;
1.18 paf 643: const size_t prefix_size=2;
1.31 parser 644: if(reader.read(buf, prefix_size)<prefix_size)
1.118 misha 645: throw Exception(IMAGE_FORMAT,
1.91 paf 646: &origin_string,
1.34 parser 647: "not JPEG file - too small");
1.80 paf 648: uchar *signature=(uchar *)buf;
1.1 paf 649:
1.31 parser 650: if(!(signature[0]==0xFF && signature[1]==0xD8))
1.118 misha 651: throw Exception(IMAGE_FORMAT,
1.91 paf 652: &origin_string,
1.44 parser 653: "not JPEG file - wrong signature");
1.31 parser 654:
655: while(true) {
1.80 paf 656: uint segment_base=reader.tell()+2/*marker,code*/;
1.31 parser 657: if(reader.read(buf, sizeof(JPG_Segment_head))<sizeof(JPG_Segment_head))
1.79 paf 658: break;
1.31 parser 659: JPG_Segment_head *head=(JPG_Segment_head *)buf;
660:
661: // Verify that it's a valid segment.
662: if(head->marker!=MARKER)
1.118 misha 663: throw Exception(IMAGE_FORMAT,
1.91 paf 664: &origin_string,
1.79 paf 665: "not JPEG file - marker not found");
666:
667: switch(head->code) {
1.118 misha 668: // http://park2.wakwak.com/~tsuruzoh/Computer/Digicams/exif-e.html
1.79 paf 669: case CODE_EXIF:
1.80 paf 670: if(exif && !*exif) // seen .jpg with some xml under EXIF tag, after real exif block :)
1.91 paf 671: *exif=parse_exif(reader, origin_string);
1.1 paf 672: break;
1.31 parser 673:
1.79 paf 674: case CODE_SIZE_A:
675: case CODE_SIZE_B:
676: case CODE_SIZE_C:
677: case CODE_SIZE_D:
678: {
679: // Segments that contain size info
680: if(reader.read(buf, sizeof(JPG_Size_segment_body))<sizeof(JPG_Size_segment_body))
1.118 misha 681: throw Exception(IMAGE_FORMAT,
1.91 paf 682: &origin_string,
1.79 paf 683: "not JPEG file - can not fully read Size segment");
684: JPG_Size_segment_body *body=(JPG_Size_segment_body *)buf;
685:
1.80 paf 686: width=endian_to_ushort(true, body->width);
687: height=endian_to_ushort(true, body->height);
1.79 paf 688: }
1.80 paf 689: return;
1.79 paf 690: };
691:
1.80 paf 692: reader.seek(segment_base+endian_to_ushort(true, head->length), SEEK_SET);
1.31 parser 693: }
694:
1.118 misha 695: throw Exception(IMAGE_FORMAT,
1.91 paf 696: &origin_string,
1.79 paf 697: "broken JPEG file - size frame not found");
1.1 paf 698: }
699:
1.91 paf 700: static void measure_png(const String& origin_string,
1.78 paf 701: Measure_reader& reader, ushort& width, ushort& height) {
1.72 paf 702:
1.91 paf 703: const char* buf;
1.102 paf 704: const size_t head_size=sizeof(PNG_Header);
705: if(reader.read(buf, head_size)<head_size)
1.118 misha 706: throw Exception(IMAGE_FORMAT,
1.91 paf 707: &origin_string,
1.72 paf 708: "not PNG file - too small");
709: PNG_Header *head=(PNG_Header *)buf;
710:
711: if(strncmp(head->signature, "IHDR", 4)!=0)
1.118 misha 712: throw Exception(IMAGE_FORMAT,
1.91 paf 713: &origin_string,
1.72 paf 714: "not PNG file - wrong signature");
715:
1.80 paf 716: width=endian_to_ushort(true, head->width);
717: height=endian_to_ushort(true, head->height);
1.72 paf 718: }
719:
1.1 paf 720: // measure center
721:
1.91 paf 722: static void measure(const String& file_name,
723: Measure_reader& reader, ushort& width, ushort& height, Value** exif) {
1.128 misha 724: const char* file_name_cstr=file_name.taint_cstr(String::L_FILE_SPEC);
1.91 paf 725: if(const char* cext=strrchr(file_name_cstr, '.')) {
1.1 paf 726: cext++;
727: if(strcasecmp(cext, "GIF")==0)
1.91 paf 728: measure_gif(file_name, reader, width, height);
1.1 paf 729: else if(strcasecmp(cext, "JPG")==0 || strcasecmp(cext, "JPEG")==0)
1.91 paf 730: measure_jpeg(file_name, reader, width, height, exif);
1.72 paf 731: else if(strcasecmp(cext, "PNG")==0)
1.91 paf 732: measure_png(file_name, reader, width, height);
1.1 paf 733: else
1.118 misha 734: throw Exception(IMAGE_FORMAT,
1.1 paf 735: &file_name,
736: "unhandled image file name extension '%s'", cext);
737: } else
1.118 misha 738: throw Exception(IMAGE_FORMAT,
1.1 paf 739: &file_name,
740: "can not determine image type - no file name extension");
741: }
742:
1.77 paf 743: // methods
1.1 paf 744:
1.40 parser 745: #ifndef DOXYGEN
1.77 paf 746: struct File_measure_action_info {
1.91 paf 747: ushort* width;
748: ushort* height;
749: Value** exif;
750: const String* file_name;
1.1 paf 751: };
1.40 parser 752: #endif
1.91 paf 753: static void file_measure_action(
1.98 paf 754: struct stat& /*finfo*/, int f,
755: const String& /*file_spec*/, const char* fname, bool /*as_text*/,
1.77 paf 756: void *context) {
757: File_measure_action_info& info=*static_cast<File_measure_action_info *>(context);
1.1 paf 758:
1.91 paf 759: Measure_file_reader reader(f, *info.file_name, fname);
760: measure(*info.file_name, reader, *info.width, *info.height, info.exif);
1.1 paf 761: }
762:
1.91 paf 763: static void _measure(Request& r, MethodParams& params) {
764: Value& data=params.as_no_junction(0, "data must not be code");
1.1 paf 765:
1.78 paf 766: ushort width=0;
767: ushort height=0;
1.91 paf 768: Value* exif=0;
769: const String* file_name;
1.100 paf 770: if((file_name=data.get_string())) {
771: File_measure_action_info info={
772: &width, &height,
773: &exif,
774: file_name
775: };
1.91 paf 776: file_read_action_under_lock(r.absolute(*file_name),
1.77 paf 777: "measure", file_measure_action, &info);
1.1 paf 778: } else {
1.129 misha 779: VFile* vfile=data.as_vfile(String::L_AS_IS);
1.91 paf 780: file_name=&vfile->fields().get(name_name)->as_string();
1.77 paf 781: Measure_buf_reader reader(
1.91 paf 782: vfile->value_ptr(),
783: vfile->value_size(),
1.77 paf 784: *file_name
785: );
1.91 paf 786: measure(*file_name, reader, width, height, &exif);
1.1 paf 787: }
788:
1.91 paf 789: GET_SELF(r, VImage).set(file_name, width, height, 0, exif);
1.1 paf 790: }
791:
1.40 parser 792: #ifndef DOXYGEN
1.4 paf 793: struct Attrib_info {
1.91 paf 794: String* tag; ///< html tag being constructed
795: HashStringValue* skip; ///< tag attributes not to append to tag string [to skip]
1.4 paf 796: };
1.40 parser 797: #endif
1.91 paf 798: static void append_attrib_pair(
1.133 misha 799: HashStringValue::key_type key,
800: HashStringValue::value_type value,
801: Attrib_info* info) {
802: // skip user-specified, internal(starting with "line-") attributes and border attribute with empty value
803: if(
804: (info->skip && info->skip->get(key))
805: || key.pos("line-")==0
806: || (key=="border" && !value->is_defined())
807: )
1.4 paf 808: return;
809:
1.133 misha 810: // src="a.gif" width="123" ismap[=-1]
1.91 paf 811: *info->tag << " " << key;
812: if(value->is_string() || value->as_int()>=0)
813: *info->tag << "=\"" << value->as_string() << "\"";
1.3 paf 814: }
1.91 paf 815: static void _html(Request& r, MethodParams& params) {
1.3 paf 816:
1.91 paf 817: String tag;
1.3 paf 818: tag << "<img";
1.4 paf 819:
1.91 paf 820: const HashStringValue& fields=GET_SELF(r, VImage).fields();
821: HashStringValue* attribs=0;
1.4 paf 822:
1.91 paf 823: if(params.count()) {
1.69 paf 824: // for backward compatibility: someday was ^html{}
1.133 misha 825: Value& vattribs=r.process_to_value(params[0], false/*don't intercept string*/);
1.82 paf 826: if(!vattribs.is_string()) // allow empty
1.100 paf 827: if((attribs=vattribs.get_hash())) {
828: Attrib_info info={&tag, 0};
1.114 paf 829: attribs->for_each<Attrib_info*>(append_attrib_pair, &info);
1.39 parser 830: } else
1.115 misha 831: throw Exception(PARSER_RUNTIME,
1.91 paf 832: 0,
1.39 parser 833: "attributes must be hash");
834: }
1.4 paf 835:
1.91 paf 836: {
837: Attrib_info info={&tag, attribs};
1.114 paf 838: fields.for_each<Attrib_info*>(append_attrib_pair, &info);
1.91 paf 839: }
1.6 paf 840: tag << " />";
1.3 paf 841: r.write_pass_lang(tag);
842: }
1.8 paf 843:
1.68 paf 844: /// @test wrap FILE to auto-object
1.91 paf 845: static gdImage* load(Request& r,
1.16 paf 846: const String& file_name){
1.128 misha 847: const char* file_name_cstr=r.absolute(file_name).taint_cstr(String::L_FILE_SPEC);
1.16 paf 848: if(FILE *f=fopen(file_name_cstr, "rb")) {
1.91 paf 849: gdImage* image=new gdImage;
850: bool ok=image->CreateFromGif(f);
1.16 paf 851: fclose(f);
1.23 paf 852: if(!ok)
1.118 misha 853: throw Exception(IMAGE_FORMAT,
1.23 paf 854: &file_name,
855: "is not in GIF format");
1.91 paf 856: return image;
1.16 paf 857: } else {
1.68 paf 858: throw Exception("file.missing",
1.91 paf 859: 0,
1.16 paf 860: "can not open '%s'", file_name_cstr);
861: }
862: }
863:
864:
1.91 paf 865: static void _load(Request& r, MethodParams& params) {
1.116 misha 866: const String& file_name=params.as_string(0, FILE_NAME_MUST_NOT_BE_CODE);
1.6 paf 867:
1.91 paf 868: gdImage* image=load(r, file_name);
869: GET_SELF(r, VImage).set(&file_name, image->SX(), image->SY(), image);
1.6 paf 870: }
871:
1.91 paf 872: static void _create(Request& r, MethodParams& params) {
873: int width=params.as_int(0, "width must be int", r);
874: int height=params.as_int(1, "height must be int", r);
1.8 paf 875: int bgcolor_value=0xffFFff;
1.91 paf 876: if(params.count()>2)
877: bgcolor_value=params.as_int(2, "color must be int", r);
878: gdImage* image=new gdImage;
879: image->Create(width, height);
880: image->FilledRectangle(0, 0, width-1, height-1, image->Color(bgcolor_value));
881: GET_SELF(r, VImage).set(0, width, height, image);
1.6 paf 882: }
883:
1.91 paf 884: static void _gif(Request& r, MethodParams& params) {
1.108 paf 885: gdImage& image=GET_SELF(r, VImage).image();
1.6 paf 886:
1.138 misha 887: const String *file_name=params.count()>0?¶ms.as_string(0, FILE_NAME_MUST_BE_STRING):0;
1.10 paf 888:
1.108 paf 889: gdBuf buf=image.Gif();
1.6 paf 890:
1.91 paf 891: VFile& vfile=*new VFile;
1.137 misha 892:
1.142 moko 893: vfile.set_binary(false/*not tainted*/, (const char *)buf.ptr, buf.size, file_name, new VString(*new String("image/gif")));
1.137 misha 894:
1.6 paf 895: r.write_no_lang(vfile);
896: }
897:
1.91 paf 898: static void _line(Request& r, MethodParams& params) {
1.108 paf 899: gdImage& image=GET_SELF(r, VImage).image();
1.12 paf 900:
1.108 paf 901: image.Line(
1.91 paf 902: params.as_int(0, "x0 must be int", r),
903: params.as_int(1, "y0 must be int", r),
904: params.as_int(2, "x1 must be int", r),
905: params.as_int(3, "y1 must be int", r),
1.108 paf 906: image.Color(params.as_int(4, "color must be int", r)));
1.13 paf 907: }
908:
1.91 paf 909: static void _fill(Request& r, MethodParams& params) {
1.108 paf 910: gdImage& image=GET_SELF(r, VImage).image();
1.12 paf 911:
1.108 paf 912: image.Fill(
1.91 paf 913: params.as_int(0, "x must be int", r),
914: params.as_int(1, "y must be int", r),
1.108 paf 915: image.Color(params.as_int(2, "color must be int", r)));
1.13 paf 916: }
917:
1.91 paf 918: static void _rectangle(Request& r, MethodParams& params) {
1.108 paf 919: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 920:
1.108 paf 921: image.Rectangle(
1.91 paf 922: params.as_int(0, "x0 must be int", r),
923: params.as_int(1, "y0 must be int", r),
924: params.as_int(2, "x1 must be int", r),
925: params.as_int(3, "y1 must be int", r),
1.108 paf 926: image.Color(params.as_int(4, "color must be int", r)));
1.13 paf 927: }
928:
1.91 paf 929: static void _bar(Request& r, MethodParams& params) {
1.108 paf 930: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 931:
1.108 paf 932: image.FilledRectangle(
1.91 paf 933: params.as_int(0, "x0 must be int", r),
934: params.as_int(1, "y0 must be int", r),
935: params.as_int(2, "x1 must be int", r),
936: params.as_int(3, "y1 must be int", r),
1.108 paf 937: image.Color(params.as_int(4, "color must be int", r)));
1.13 paf 938: }
939:
1.44 parser 940: #ifndef DOXYGEN
1.91 paf 941: static void add_point(Table::element_type row,
942: gdImage::Point **p) {
1.110 paf 943: if(row->count()!=2)
944: throw Exception(0,
945: 0,
946: "coordinates table must contain two columns: x and y values");
1.91 paf 947: (**p).x=row->get(0)->as_int();
948: (**p).y=row->get(1)->as_int();
1.44 parser 949: (*p)++;
950: }
951: #endif
1.135 misha 952: #ifndef DOXYGEN
953: static void add_point(int x, int y,
954: gdImage::Point **p) {
955: (**p).x=x;
956: (**p).y=y;
957: (*p)++;
958: }
959: #endif
1.91 paf 960: static void _replace(Request& r, MethodParams& params) {
1.135 misha 961: int src_color=params.as_int(0, "src color must be int", r);
962: int dest_color=params.as_int(1, "dest color must be int", r);
963:
1.108 paf 964: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 965:
1.135 misha 966: gdImage::Point* all_p=0;
967: size_t count=0;
968: if(params.count() == 3){
1.140 misha 969: Table* table=params.as_table(2, "coordinates");
1.135 misha 970: count=table->count();
971: all_p=new(PointerFreeGC) gdImage::Point[count];
972: gdImage::Point* add_p=all_p;
973: table->for_each(add_point, &add_p);
974: } else {
975: int max_x=image.SX()-1;
976: int max_y=image.SY()-1;
977: if(max_x > 0 && max_y > 0){
978: count=4;
979: all_p=new(PointerFreeGC) gdImage::Point[count];
980: gdImage::Point* add_p=all_p;
981: add_point(0, 0, &add_p);
982: add_point(max_x, 0, &add_p);
983: add_point(max_x, max_y, &add_p);
984: add_point(0, max_y, &add_p);
985: }
986: }
1.13 paf 987:
1.135 misha 988: if(count)
989: image.FilledPolygonReplaceColor(all_p, count, image.Color(src_color), image.Color(dest_color));
1.13 paf 990: }
991:
1.91 paf 992: static void _polyline(Request& r, MethodParams& params) {
1.108 paf 993: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 994:
1.140 misha 995: Table* table=params.as_table(1, "coordinates");
1.44 parser 996:
1.92 paf 997: gdImage::Point* all_p=new(PointerFreeGC) gdImage::Point[table->count()];
1.44 parser 998: gdImage::Point *add_p=all_p;
999: table->for_each(add_point, &add_p);
1.108 paf 1000: image.Polygon(all_p, table->count(),
1001: image.Color(params.as_int(0, "color must be int", r)),
1.44 parser 1002: false/*not closed*/);
1003: }
1004:
1.91 paf 1005: static void _polygon(Request& r, MethodParams& params) {
1.108 paf 1006: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 1007:
1.140 misha 1008: Table* table=(Table*)params.as_table(1, "coordinates");
1.44 parser 1009:
1.92 paf 1010: gdImage::Point* all_p=new(PointerFreeGC) gdImage::Point[table->count()];
1.44 parser 1011: gdImage::Point *add_p=all_p;
1012: table->for_each(add_point, &add_p);
1.108 paf 1013: image.Polygon(all_p, table->count(),
1014: image.Color(params.as_int(0, "color must be int", r)));
1.13 paf 1015: }
1016:
1.91 paf 1017: static void _polybar(Request& r, MethodParams& params) {
1.108 paf 1018: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 1019:
1.140 misha 1020: Table* table=(Table*)params.as_table(1, "coordinates");
1.13 paf 1021:
1.92 paf 1022: gdImage::Point* all_p=new(PointerFreeGC) gdImage::Point[table->count()];
1.44 parser 1023: gdImage::Point *add_p=all_p;
1024: table->for_each(add_point, &add_p);
1.108 paf 1025: image.FilledPolygon(all_p, table->count(),
1026: image.Color(params.as_int(0, "color must be int", r)));
1.12 paf 1027: }
1028:
1.16 paf 1029: // font
1030:
1.85 paf 1031: #define Y(y)(y+index*height)
1.21 paf 1032:
1.91 paf 1033: // Font class
1034:
1.132 misha 1035: Font::Font(
1036: Charset& asource_charset,
1.91 paf 1037: const String& aalphabet,
1.125 misha 1038: gdImage* aifont, int aheight, int amonospace, int aspacebarspace, int aletterspacing):
1.132 misha 1039: fsource_charset(asource_charset),
1040: height(aheight),
1041: monospace(amonospace),
1042: spacebarspace(aspacebarspace),
1.125 misha 1043: letterspacing(aletterspacing),
1.100 paf 1044: ifont(aifont),
1045: alphabet(aalphabet) {
1.132 misha 1046:
1047: if(fsource_charset.isUTF8()){
1048: size_t index=0;
1049: for(UTF8_string_iterator i(alphabet); i.has_next(); )
1050: fletter2index.put_dont_replace(i.next(), index++);
1051: }
1.91 paf 1052: }
1053:
1054: /* ******************************** char ********************************** */
1055:
1056: size_t Font::index_of(char ch) {
1057: if(ch==' ') return STRING_NOT_FOUND;
1058: return alphabet.pos(ch);
1059: }
1060:
1.132 misha 1061: size_t Font::index_of(XMLCh ch) {
1062: if(ch==' ') return STRING_NOT_FOUND;
1063: return fletter2index.get(ch);
1064: }
1065:
1.91 paf 1066: int Font::index_width(size_t index) {
1067: if(index==STRING_NOT_FOUND)
1068: return spacebarspace;
1069: int tr=ifont->GetTransparent();
1070: for(int x=ifont->SX()-1; x>=0; x--) {
1071: for(int y=0; y<height; y++)
1072: if(ifont->GetPixel(x, Y(y))!=tr)
1073: return x+1;
1.16 paf 1074: }
1.91 paf 1075: return 0;
1076: }
1077:
1.108 paf 1078: void Font::index_display(gdImage& image, int x, int y, size_t index){
1.91 paf 1079: if(index!=STRING_NOT_FOUND)
1.108 paf 1080: ifont->Copy(image, x, y, 0, Y(0), index_width(index), height);
1.91 paf 1081: }
1082:
1083: /* ******************************** string ********************************** */
1084:
1085: int Font::step_width(int index) {
1.125 misha 1086: return letterspacing + (monospace ? monospace : index_width(index));
1.91 paf 1087: }
1088:
1089: // counts trailing letter_spacing, consider this OK. useful for contiuations
1090: int Font::string_width(const String& s){
1091: const char* cstr=s.cstr();
1092: int result=0;
1.132 misha 1093:
1094: if(fsource_charset.isUTF8()){
1095: for(UTF8_string_iterator i(s); i.has_next(); )
1096: result+=step_width(index_of(i.next()));
1097: } else {
1098: for(const char* current=cstr; *current; current++)
1099: result+=step_width(index_of(*current));
1100: }
1101:
1.91 paf 1102: return result;
1103: }
1104:
1.108 paf 1105: void Font::string_display(gdImage& image, int x, int y, const String& s){
1.91 paf 1106: const char* cstr=s.cstr();
1.132 misha 1107:
1108: if(fsource_charset.isUTF8()){
1109: for(UTF8_string_iterator i(s); i.has_next(); ){
1110: size_t index=index_of(i.next());
1111: index_display(image, x, y, index);
1112: x+=step_width(index);
1113: }
1114: } else {
1115: for(const char* current=cstr; *current; current++) {
1116: size_t index=index_of(*current);
1117: index_display(image, x, y, index);
1118: x+=step_width(index);
1119: }
1.87 paf 1120: }
1.91 paf 1121: }
1.87 paf 1122:
1.91 paf 1123: //
1.35 parser 1124:
1.16 paf 1125:
1.91 paf 1126: static void _font(Request& r, MethodParams& params) {
1127: const String& alphabet=params.as_string(0, "alphabet must not be code");
1.131 misha 1128: size_t alphabet_length=alphabet.length(r.charsets.source());
1129: if(!alphabet_length)
1.115 misha 1130: throw Exception(PARSER_RUNTIME,
1.91 paf 1131: 0,
1.37 parser 1132: "alphabet must not be empty");
1.84 paf 1133:
1.125 misha 1134: gdImage* image=load(r, params.as_string(1, FILE_NAME_MUST_NOT_BE_CODE));
1135:
1.126 misha 1136: int spacebar_width=image->SX();
1.125 misha 1137: int monospace_width=0; // proportional
1138: int letter_spacing=1;
1139: if(params.count()>2){
1140: if(HashStringValue* options=params.as_no_junction(2, "param must be int or hash").get_hash()){
1141: // third option is hash
1142: if(params.count()>3)
1143: throw Exception(PARSER_RUNTIME,
1144: 0,
1145: "too many options were specified");
1146: int valid_options=0;
1147: if(Value* vspacebar_width=options->get(spacebar_width_name)){
1148: valid_options++;
1149: spacebar_width=r.process_to_value(*vspacebar_width).as_int();
1150: }
1151: if(Value* vmonospace_width=options->get(monospace_width_name)){
1152: valid_options++;
1153: monospace_width=r.process_to_value(*vmonospace_width).as_int();
1154: if(!monospace_width)
1155: monospace_width=image->SX();
1156: }
1157: if(Value* vletter_spacing=options->get(letter_spacing_name)){
1158: valid_options++;
1159: letter_spacing=r.process_to_value(*vletter_spacing).as_int();
1160: }
1161: if(valid_options!=options->count())
1.134 misha 1162: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.125 misha 1163: } else {
1164: // backward
1165: spacebar_width=params.as_int(2, "spacebar_width must be int", r);
1166: if(params.count()>3) {
1167: monospace_width=params.as_int(3, "monospace_width must be int", r);
1168: if(!monospace_width)
1169: monospace_width=image->SX();
1170: }
1171: }
1172: }
1173:
1.131 misha 1174: if(int remainder=image->SY() % alphabet_length)
1.115 misha 1175: throw Exception(PARSER_RUNTIME,
1.91 paf 1176: 0,
1.84 paf 1177: "font-file height(%d) not divisable by alphabet size(%d), remainder=%d",
1.131 misha 1178: image->SY(), alphabet_length, remainder);
1.37 parser 1179:
1.108 paf 1180: GET_SELF(r, VImage).set_font(new Font(
1.132 misha 1181: r.charsets.source(),
1.37 parser 1182: alphabet,
1.36 parser 1183: image,
1.131 misha 1184: image->SY() / alphabet_length, monospace_width, spacebar_width, letter_spacing));
1.16 paf 1185: }
1186:
1.91 paf 1187: static void _text(Request& r, MethodParams& params) {
1188: int x=params.as_int(0, "x must be int", r);
1189: int y=params.as_int(1, "y must be int", r);
1190: const String& s=params.as_string(2, "text must not be code");
1.16 paf 1191:
1.91 paf 1192: VImage& vimage=GET_SELF(r, VImage);
1.108 paf 1193: vimage.font().string_display(vimage.image(), x, y, s);
1.16 paf 1194: }
1195:
1.91 paf 1196: static void _length(Request& r, MethodParams& params) {
1197: const String& s=params.as_string(0, "text must not be code");
1.47 parser 1198:
1.91 paf 1199: VImage& vimage=GET_SELF(r, VImage);
1.108 paf 1200: r.write_no_lang(*new VInt(vimage.font().string_width(s)));
1.47 parser 1201: }
1202:
1.91 paf 1203: static void _arc(Request& r, MethodParams& params) {
1.108 paf 1204: gdImage& image=GET_SELF(r, VImage).image();
1.48 parser 1205:
1.108 paf 1206: image.Arc(
1.91 paf 1207: params.as_int(0, "center_x must be int", r),
1208: params.as_int(1, "center_y must be int", r),
1209: params.as_int(2, "width must be int", r),
1210: params.as_int(3, "height must be int", r),
1211: params.as_int(4, "start degrees must be int", r),
1212: params.as_int(5, "end degrees must be int", r),
1.108 paf 1213: image.Color(params.as_int(6, "cx must be int", r)));
1.48 parser 1214: }
1215:
1.91 paf 1216: static void _sector(Request& r, MethodParams& params) {
1.108 paf 1217: gdImage& image=GET_SELF(r, VImage).image();
1.49 parser 1218:
1.108 paf 1219: image.Sector(
1.91 paf 1220: params.as_int(0, "center_x must be int", r),
1221: params.as_int(1, "center_y must be int", r),
1222: params.as_int(2, "width must be int", r),
1223: params.as_int(3, "height must be int", r),
1224: params.as_int(4, "start degrees must be int", r),
1225: params.as_int(5, "end degrees must be int", r),
1.108 paf 1226: image.Color(params.as_int(6, "color must be int", r)));
1.49 parser 1227: }
1228:
1.91 paf 1229: static void _circle(Request& r, MethodParams& params) {
1.108 paf 1230: gdImage& image=GET_SELF(r, VImage).image();
1.48 parser 1231:
1.91 paf 1232: int size=params.as_int(2, "radius must be int", r)*2;
1.108 paf 1233: image.Arc(
1.91 paf 1234: params.as_int(0, "center_x must be int", r),
1235: params.as_int(1, "center_y must be int", r),
1.50 parser 1236: size, //w
1237: size, //h
1.48 parser 1238: 0, //s
1239: 360, //e
1.108 paf 1240: image.Color(params.as_int(3, "color must be int", r)));
1.48 parser 1241: }
1242:
1.108 paf 1243: gdImage& as_image(MethodParams& params, int index, const char* msg) {
1.91 paf 1244: Value& value=params.as_no_junction(index, msg);
1.53 parser 1245:
1.130 misha 1246: if(Value* vimage=value.as(VIMAGE_TYPE)) {
1.108 paf 1247: return static_cast<VImage *>(vimage)->image();
1.75 paf 1248: } else
1.115 misha 1249: throw Exception(PARSER_RUNTIME,
1.91 paf 1250: 0,
1.53 parser 1251: msg);
1252: }
1253:
1.91 paf 1254: static void _copy(Request& r, MethodParams& params) {
1.108 paf 1255: gdImage& dest=GET_SELF(r, VImage).image();
1.53 parser 1256:
1.108 paf 1257: gdImage& src=as_image(params, 0, "src must be image");
1.53 parser 1258:
1.91 paf 1259: int sx=params.as_int(1, "src_x must be int", r);
1260: int sy=params.as_int(2, "src_y must be int", r);
1261: int sw=params.as_int(3, "src_w must be int", r);
1262: int sh=params.as_int(4, "src_h must be int", r);
1263: int dx=params.as_int(5, "dest_x must be int", r);
1264: int dy=params.as_int(6, "dest_y must be int", r);
1265: if(params.count()>1+2+2+2) {
1266: int dw=params.as_int(1+2+2+2, "dest_w must be int", r);
1267: int dh=(int)(params.count()>1+2+2+2+1?
1268: params.as_int(1+2+2+2+1, "dest_h must be int", r):sh*(((double)dw)/((double)sw)));
1269: int tolerance=params.count()>1+2+2+2+2?
1270: params.as_int(1+2+2+2+2, "tolerance must be int", r):150;
1.53 parser 1271:
1.108 paf 1272: src.CopyResampled(dest, dx, dy, sx, sy, dw, dh, sw, sh, tolerance);
1.53 parser 1273: } else
1.108 paf 1274: src.Copy(dest, dx, dy, sx, sy, sw, sh);
1275: }
1276:
1277: static void _pixel(Request& r, MethodParams& params) {
1278: gdImage& image=GET_SELF(r, VImage).image();
1279:
1.109 paf 1280: int x=params.as_int(0, "x must be int", r);
1281: int y=params.as_int(1, "y must be int", r);
1282:
1283: if(params.count()>2) {
1284: image.SetPixel(x, y,
1285: image.Color(params.as_int(2, "color must be int", r)));
1286: } else
1287: r.write_no_lang(*new VInt(image.DecodeColor(image.GetPixel(x, y))));
1.53 parser 1288: }
1289:
1290:
1.22 paf 1291: // constructor
1292:
1.91 paf 1293: MImage::MImage(): Methoded("image") {
1.1 paf 1294: // ^image:measure[DATA]
1.22 paf 1295: add_native_method("measure", Method::CT_DYNAMIC, _measure, 1, 1);
1.3 paf 1296:
1.25 paf 1297: // ^image.html[]
1298: // ^image.html[hash]
1.22 paf 1299: add_native_method("html", Method::CT_DYNAMIC, _html, 0, 1);
1.6 paf 1300:
1.25 paf 1301: // ^image.load[background.gif]
1.22 paf 1302: add_native_method("load", Method::CT_DYNAMIC, _load, 1, 1);
1.6 paf 1303:
1.25 paf 1304: // ^image.create[width;height] bgcolor=white
1305: // ^image.create[width;height;bgcolor]
1.22 paf 1306: add_native_method("create", Method::CT_DYNAMIC, _create, 2, 3);
1.6 paf 1307:
1.25 paf 1308: // ^image.gif[]
1.95 paf 1309: add_native_method("gif", Method::CT_DYNAMIC, _gif, 0, 1);
1.12 paf 1310:
1.25 paf 1311: // ^image.line(x0;y0;x1;y1;color)
1.22 paf 1312: add_native_method("line", Method::CT_DYNAMIC, _line, 5, 5);
1.13 paf 1313:
1.25 paf 1314: // ^image.fill(x;y;color)
1.22 paf 1315: add_native_method("fill", Method::CT_DYNAMIC, _fill, 3, 3);
1.13 paf 1316:
1.25 paf 1317: // ^image.rectangle(x0;y0;x1;y1;color)
1.22 paf 1318: add_native_method("rectangle", Method::CT_DYNAMIC, _rectangle, 5, 5);
1.13 paf 1319:
1.25 paf 1320: // ^image.bar(x0;y0;x1;y1;color)
1.22 paf 1321: add_native_method("bar", Method::CT_DYNAMIC, _bar, 5, 5);
1.13 paf 1322:
1.44 parser 1323: // ^image.replace(color-source;color-dest)[table x:y]
1.135 misha 1324: // ^image.replace(color-source;color-dest)
1325: add_native_method("replace", Method::CT_DYNAMIC, _replace, 2, 3);
1.44 parser 1326:
1327: // ^image.polyline(color)[table x:y]
1328: add_native_method("polyline", Method::CT_DYNAMIC, _polyline, 2, 2);
1.13 paf 1329:
1.44 parser 1330: // ^image.polygon(color)[table x:y]
1331: add_native_method("polygon", Method::CT_DYNAMIC, _polygon, 2, 2);
1.13 paf 1332:
1.44 parser 1333: // ^image.polybar(color)[table x:y]
1334: add_native_method("polybar", Method::CT_DYNAMIC, _polybar, 2, 2);
1.13 paf 1335:
1.125 misha 1336: // ^image.font[alPHAbet;font-file-name.gif]
1337: // ^image.font[alPHAbet;font-file-name.gif](spacebar_width)
1338: // ^image.font[alPHAbet;font-file-name.gif](spacebar_width;letter_width)
1339: // ^image.font[alPHAbet;font-file-name.gif][$.space-width(.) $.letter-width(.) $.letter-space(.)]
1340: add_native_method("font", Method::CT_DYNAMIC, _font, 2, 4);
1.16 paf 1341:
1.125 misha 1342: // ^image.text(x;y)[text]
1.22 paf 1343: add_native_method("text", Method::CT_DYNAMIC, _text, 3, 3);
1.47 parser 1344:
1.125 misha 1345: // ^image.length[text]
1.47 parser 1346: add_native_method("length", Method::CT_DYNAMIC, _length, 1, 1);
1.16 paf 1347:
1.48 parser 1348: // ^image.arc(center x;center y;width;height;start in degrees;end in degrees;color)
1349: add_native_method("arc", Method::CT_DYNAMIC, _arc, 7, 7);
1.49 parser 1350:
1351: // ^image.sector(center x;center y;width;height;start in degrees;end in degrees;color)
1352: add_native_method("sector", Method::CT_DYNAMIC, _sector, 7, 7);
1.48 parser 1353:
1354: // ^image.circle(center x;center y;r;color)
1355: add_native_method("circle", Method::CT_DYNAMIC, _circle, 4, 4);
1356:
1.56 parser 1357: // ^image.copy[source](src x;src y;src w;src h;dst x;dst y[;dest w[;dest h[;tolerance]]])
1358: add_native_method("copy", Method::CT_DYNAMIC, _copy, 1+2+2+2, (1+2+2+2)+2+1);
1.108 paf 1359:
1360: // ^image.pixel(x;y)[(color)]
1.109 paf 1361: add_native_method("pixel", Method::CT_DYNAMIC, _pixel, 2, 3);
1.1 paf 1362: }
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