Annotation of parser3/src/classes/image.C, revision 1.120
1.1 paf 1: /** @file
2: Parser: @b image parser class.
3:
1.120 ! misha 4: Copyright(c) 2001-2009 ArtLebedev Group (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:
1.120 ! misha 8: static const char * const IDENT_IMAGE_C="$Date: 2008-09-04 09:38:09 $";
1.31 parser 9:
10: /*
11: jpegsize: gets the width and height (in pixels) of a jpeg file
12: Andrew Tong, werdna@ugcs.caltech.edu February 14, 1995
13: modified slightly by alex@ed.ac.uk
14: and further still by rjray@uswest.com
15: optimization and general re-write from tmetro@vl.com
16: from perl by paf@design.ru
1.1 paf 17: */
18:
19: #include "pa_config_includes.h"
20:
1.91 paf 21: #include "pa_vmethod_frame.h"
22:
1.8 paf 23: #include "gif.h"
1.6 paf 24:
1.1 paf 25: #include "pa_common.h"
26: #include "pa_request.h"
27: #include "pa_vfile.h"
28: #include "pa_vimage.h"
1.89 paf 29: #include "pa_vdate.h"
1.91 paf 30: #include "pa_table.h"
1.1 paf 31:
1.22 paf 32: // class
33:
1.91 paf 34: class MImage: public Methoded {
1.22 paf 35: public: // VStateless_class
1.112 paf 36: Value* create_new_value(Pool&, HashStringValue&) { return new VImage(); }
1.22 paf 37:
38: public:
1.91 paf 39: MImage();
1.24 paf 40:
41: public: // Methoded
1.22 paf 42: bool used_directly() { return true; }
43:
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];
1.77 paf 246: size_t read_size=(size_t)::read(f, lbuf, limit); abuf=lbuf;
247: if(ssize_t(read_size)<0 || read_size>limit)
248: throw Exception(0,
249: &file_name,
1.104 paf 250: "measure failed: actually read %u bytes count not in [0..%u] valid range",
1.77 paf 251: read_size, limit);
252:
1.1 paf 253: return read_size;
254: }
255:
1.91 paf 256: override void seek(long value, int whence) {
1.79 paf 257: if(lseek(f, value, whence)<0)
1.118 misha 258: throw Exception(IMAGE_FORMAT,
1.77 paf 259: &file_name,
1.79 paf 260: "seek(value=%ld, whence=%d) failed: %s (%d), actual filename '%s'",
261: value, whence, strerror(errno), errno, fname);
1.77 paf 262: }
263:
1.91 paf 264: override long tell() { return lseek(f, 0, SEEK_CUR); }
1.79 paf 265:
1.77 paf 266: };
267:
268: class Measure_buf_reader: public Measure_reader {
1.91 paf 269:
270: const char* buf; size_t size;
271: const String& file_name;
272:
273: size_t offset;
274:
1.77 paf 275: public:
1.91 paf 276: Measure_buf_reader(const char* abuf, size_t asize, const String& afile_name):
1.77 paf 277: buf(abuf), size(asize), file_name(afile_name), offset(0) {
278: }
279:
1.91 paf 280: override size_t read(const char* &abuf, size_t limit) {
1.77 paf 281: size_t to_read=min(limit, size-offset);
1.91 paf 282: abuf=buf+offset;
1.77 paf 283: offset+=to_read;
284: return to_read;
285: }
286:
1.91 paf 287: override void seek(long value, int whence) {
1.79 paf 288: size_t new_offset;
289: switch(whence) {
290: case SEEK_CUR: new_offset=offset+value; break;
291: case SEEK_SET: new_offset=(size_t)value; break;
1.91 paf 292: default:
293: throw Exception(0,
294: 0,
295: "whence #%d not supported", 0, whence);
296: break; // never
1.79 paf 297: }
298:
1.77 paf 299: if((ssize_t)new_offset<0 || new_offset>size)
1.118 misha 300: throw Exception(IMAGE_FORMAT,
1.77 paf 301: &file_name,
1.79 paf 302: "seek(value=%l, whence=%d) failed: out of buffer, new_offset>size (%l>%l) or new_offset<0",
303: value, whence, new_offset, size);
1.77 paf 304: offset=new_offset;
305: }
306:
1.91 paf 307: override long tell() { return offset; }
1.79 paf 308:
1.1 paf 309: };
1.77 paf 310:
1.43 parser 311: #endif
1.1 paf 312:
1.72 paf 313: /// PNG file header
314: struct PNG_Header {
315: char dummy[12];
316: char signature[4]; //< must be "IHDR"
1.80 paf 317: uchar high_width[2]; //< image width high bytes [we ignore for now]
318: uchar width[2]; //< image width low bytes
319: uchar high_height[2]; //< image height high bytes [we ignore for now]
320: uchar height[4]; //< image height
1.72 paf 321: };
322:
1.21 paf 323: /// GIF file header
1.1 paf 324: struct GIF_Header {
1.72 paf 325: char signature[3]; // 'GIF'
1.1 paf 326: char version[3];
1.80 paf 327: uchar width[2];
328: uchar height[2];
1.1 paf 329: char dif;
330: char fonColor;
331: char nulls;
332: };
333:
1.31 parser 334: /// JPEG record head
335: struct JPG_Segment_head {
1.80 paf 336: uchar marker;
337: uchar code;
338: uchar length[2];
1.1 paf 339: };
1.21 paf 340: /// JPEG frame header
1.31 parser 341: struct JPG_Size_segment_body {
1.27 parser 342: char data; //< data precision of bits/sample
1.80 paf 343: uchar height[2]; //< image height
344: uchar width[2]; //< image width
1.27 parser 345: char numComponents; //< number of color components
1.1 paf 346: };
347:
1.79 paf 348: /// JPEG frame header
1.91 paf 349: struct JPG_Exif_segment_begin {
1.79 paf 350: char signature[6]; // Exif\0\0
351: };
352:
1.80 paf 353: /// JPEG Exif TIFF Header
354: struct JPG_Exif_TIFF_header {
355: uchar byte_align_identifier[2];
356: char dummy[2]; // always 000A [or 0A00]
357: uchar first_IFD_offset[4]; // Usually the first IFD starts immediately next to TIFF header, so this offset has value '0x00000008'.
358: };
359:
360: // JPEG Exif IFD start
1.91 paf 361: struct JPG_Exif_IFD_begin {
1.80 paf 362: uchar directory_entry_count[2]; // the number of directory entry contains in this IFD
363: };
364:
365: // TTTT ffff NNNNNNNN DDDDDDDD
366: struct JPG_Exif_IFD_entry {
367: uchar tag[2]; // Tag number, this shows a kind of data
368: uchar format[2]; // data format
369: uchar components_count[4]; // number of components
370: uchar value_or_offset_to_it[4]; // data value or offset to data value
371: };
372:
373: #define JPG_IFD_TAG_EXIF_OFFSET 0x8769
374:
1.118 misha 375: #define JPG_IFD_TAG_EXIF_GPS_OFFSET 0x8825
376:
1.89 paf 377: #define JPEG_EXIF_DATE_CHARS 20
378:
1.1 paf 379: //
380:
1.80 paf 381: inline ushort x_endian_to_ushort(uchar b0, uchar b1) {
382: return (ushort)((b1<<8) + b0);
1.33 parser 383: }
384:
1.80 paf 385: inline uint x_endian_to_uint(uchar b0, uchar b1, uchar b2, uchar b3) {
386: return (uint)(((((b3<<8) + b2)<<8)+b1)<<8)+b0;
1.33 parser 387: }
388:
1.80 paf 389: inline ushort endian_to_ushort(bool is_big, const uchar *b/* [2] */) {
390: return is_big?x_endian_to_ushort(b[1], b[0]):
391: x_endian_to_ushort(b[0], b[1]);
1.1 paf 392: }
393:
1.80 paf 394: inline uint endian_to_uint(bool is_big, const uchar *b /* [4] */) {
395: return is_big?x_endian_to_uint(b[3], b[2], b[1], b[0]):
396: x_endian_to_uint(b[0], b[1], b[2], b[3]);
397: }
398:
1.91 paf 399: static void measure_gif(const String& origin_string,
1.78 paf 400: Measure_reader& reader, ushort& width, ushort& height) {
1.1 paf 401:
1.91 paf 402: const char* buf;
1.102 paf 403: const size_t head_size=sizeof(GIF_Header);
404: if(reader.read(buf, head_size)<head_size)
1.118 misha 405: throw Exception(IMAGE_FORMAT,
1.91 paf 406: &origin_string,
1.34 parser 407: "not GIF file - too small");
1.31 parser 408: GIF_Header *head=(GIF_Header *)buf;
1.1 paf 409:
1.72 paf 410: if(strncmp(head->signature, "GIF", 3)!=0)
1.118 misha 411: throw Exception(IMAGE_FORMAT,
1.91 paf 412: &origin_string,
1.44 parser 413: "not GIF file - wrong signature");
1.1 paf 414:
1.80 paf 415: width=endian_to_ushort(false, head->width);
416: height=endian_to_ushort(false, head->height);
417: }
418:
1.91 paf 419: static Value* parse_IFD_entry_formatted_one_value(
1.80 paf 420: bool is_big,
421: ushort format,
422: size_t component_size,
423: const uchar *value) {
424: switch(format) {
425: case 1: // unsigned byte
1.91 paf 426: return new VInt((uchar)value[0]);
1.80 paf 427: case 3: // unsigned short
1.91 paf 428: return new VInt(endian_to_ushort(is_big, value));
1.80 paf 429: case 4: // unsigned long
430: // 'double' because parser's Int is signed
1.91 paf 431: return new VDouble(endian_to_uint(is_big, value));
1.80 paf 432: case 5: // unsigned rational
433: {
434: uint numerator=endian_to_uint(is_big, value); value+=component_size/2;
435: uint denominator=endian_to_uint(is_big, value);
436: if(!denominator)
437: return 0;
1.91 paf 438: return new VDouble(((double)numerator)/denominator);
1.80 paf 439: }
440: case 6: // signed byte
1.91 paf 441: return new VInt((signed char)value[0]);
1.80 paf 442: case 8: // signed short
1.91 paf 443: return new VInt((signed short)endian_to_ushort(is_big, value));
1.80 paf 444: case 9: // signed long
1.91 paf 445: return new VInt((signed int)endian_to_uint(is_big, value));
1.80 paf 446: case 10: // signed rational
447: {
448: signed int numerator=(signed int)endian_to_uint(is_big, value); value+=component_size/2;
449: uint denominator=endian_to_uint(is_big, value);
450: if(!denominator)
451: return 0;
1.91 paf 452: return new VDouble(numerator/denominator);
1.80 paf 453: }
454: /*
455: case 11: // single float
1.120 ! misha 456: @todo
1.80 paf 457: case 12: // double float
1.120 ! misha 458: @todo
1.80 paf 459: */
460: };
461:
462: return 0;
463: }
464:
1.89 paf 465: // date.C
1.107 paf 466: tm cstr_to_time_t(char *cstr);
1.89 paf 467:
1.91 paf 468: static Value* parse_IFD_entry_formatted_value(bool is_big, ushort format,
469: size_t component_size, uint components_count,
470: const uchar *value) {
1.80 paf 471: if(format==2) { // ascii string, exception: the only type with varying size
1.91 paf 472: const char* cstr=(const char* )value;
473: size_t length=components_count;
1.89 paf 474: // Data format is "YYYY:MM:DD HH:MM:SS"+0x00, total 20bytes
1.91 paf 475: if(length==JPEG_EXIF_DATE_CHARS
1.111 paf 476: && isdigit((unsigned char)cstr[0])
1.91 paf 477: && cstr[length-1]==0) {
1.89 paf 478: char cstr_writable[JPEG_EXIF_DATE_CHARS];
479: strcpy(cstr_writable, cstr);
480:
1.106 paf 481: try {
482: return new VDate(cstr_to_time_t(cstr_writable));
483: }
484: catch(...) { /*ignore bad date times*/ }
1.89 paf 485: }
486:
1.91 paf 487: if(const char* premature_zero_pos=(const char* )memchr(cstr, 0, length))
488: length=premature_zero_pos-cstr;
489: return new VString(*new String(cstr, length, true/*tainted*/));
1.80 paf 490: }
491:
492: if(components_count==1)
1.91 paf 493: return parse_IFD_entry_formatted_one_value(is_big, format, component_size, value);
1.80 paf 494:
1.91 paf 495: VHash* result=new VHash;
496: HashStringValue& hash=result->hash();
1.80 paf 497: for(uint i=0; i<components_count; i++, value+=component_size) {
1.91 paf 498: hash.put(
1.93 paf 499: String::Body::Format(i),
1.91 paf 500: parse_IFD_entry_formatted_one_value(is_big, format, component_size, value));
1.80 paf 501: }
502:
1.91 paf 503: return result;
1.80 paf 504: }
505:
1.91 paf 506: static Value* parse_IFD_entry_value(
1.80 paf 507: bool is_big, Measure_reader& reader, long tiff_base,
508: JPG_Exif_IFD_entry& entry) {
509: size_t format2component_size[]={
510: 0, // undefined
511: 1, // unsigned byte
512: 1, // ascii string
513: 2, // unsigned short
514: 4, // unsigned long
515: 8, // unsigned rational
516: 1, // signed byte
517: 0, // undefined
518: 2, // signed short
519: 4, // signed long
520: 8, // signed rational
521: /*
522: 4, // single float
523: 8, // double float
524: */
525: };
526:
527: ushort format=endian_to_ushort(is_big, entry.format);
528: if(format>=sizeof(format2component_size)/sizeof(format2component_size[0]))
529: return 0; // format out of range, ignoring
530:
531: size_t component_size=format2component_size[format];
532: if(component_size==0)
533: return 0; // undefined format
534:
535: // You can get the total data byte length by multiplies
536: // a 'bytes/components' value (see above chart) by number of components stored 'NNNNNNNN' area
537: uint components_count=endian_to_uint(is_big, entry.components_count);
538: size_t value_size=component_size*components_count;
539: // If its size is over 4bytes, 'DDDDDDDD' contains the offset to data stored address
1.91 paf 540: Value* result;
1.80 paf 541:
542: if(value_size<=4)
1.91 paf 543: result=parse_IFD_entry_formatted_value(
1.80 paf 544: is_big, format,
545: component_size, components_count,
546: entry.value_or_offset_to_it);
547: else {
548: long remembered=reader.tell();
549: {
550: reader.seek(tiff_base+endian_to_uint(is_big, entry.value_or_offset_to_it), SEEK_SET);
1.91 paf 551: const char* value;
1.80 paf 552: if(reader.read(value, value_size)<sizeof(value_size))
553: return 0;
1.91 paf 554: result=parse_IFD_entry_formatted_value(
1.80 paf 555: is_big, format,
556: component_size, components_count,
557: (const uchar*)value);
558: }
559: reader.seek(remembered, SEEK_SET);
560: }
561:
562: return result;
563: }
564:
1.91 paf 565: static void parse_IFD(HashStringValue& hash,
1.118 misha 566: bool is_big, Measure_reader& reader, long tiff_base, bool gps=false);
1.91 paf 567:
568: static void parse_IFD_entry(HashStringValue& hash,
569: bool is_big, Measure_reader& reader, long tiff_base,
1.118 misha 570: JPG_Exif_IFD_entry& entry, bool gps=false) {
1.80 paf 571: ushort tag=endian_to_ushort(is_big, entry.tag);
1.118 misha 572:
573: if(tag==JPG_IFD_TAG_EXIF_OFFSET || tag==JPG_IFD_TAG_EXIF_GPS_OFFSET){
1.80 paf 574: long remembered=reader.tell();
575: {
576: reader.seek(tiff_base+endian_to_uint(is_big, entry.value_or_offset_to_it), SEEK_SET);
1.118 misha 577: parse_IFD(hash, is_big, reader, tiff_base, (tag==JPG_IFD_TAG_EXIF_GPS_OFFSET)?true:gps);
1.80 paf 578: }
579: reader.seek(remembered, SEEK_SET);
580: return;
581: }
1.118 misha 582:
1.91 paf 583: if(Value* value=parse_IFD_entry_value(is_big, reader, tiff_base, entry)) {
1.118 misha 584: if(const char* name=(gps)?exif_gps_tag_value2name.get(tag):exif_tag_value2name.get(tag))
1.93 paf 585: hash.put(String::Body(name), value);
1.80 paf 586: else
1.93 paf 587: hash.put(String::Body::Format(tag), value);
1.80 paf 588: }
1.1 paf 589: }
590:
1.91 paf 591: static void parse_IFD(
592: HashStringValue& hash,
1.118 misha 593: bool is_big, Measure_reader& reader, long tiff_base, bool gps) {
1.91 paf 594: const char* buf;
595: if(reader.read(buf, sizeof(JPG_Exif_IFD_begin))<sizeof(JPG_Exif_IFD_begin))
1.80 paf 596: return;
1.91 paf 597: JPG_Exif_IFD_begin *start=(JPG_Exif_IFD_begin *)buf;
1.80 paf 598:
599: ushort directory_entry_count=endian_to_ushort(is_big, start->directory_entry_count);
600: for(int i=0; i<directory_entry_count; i++) {
601: if(reader.read(buf, sizeof(JPG_Exif_IFD_entry))<sizeof(JPG_Exif_IFD_entry))
602: return;
603:
1.118 misha 604: parse_IFD_entry(hash, is_big, reader, tiff_base, *(JPG_Exif_IFD_entry *)buf, gps);
1.80 paf 605: }
606: // then goes: LLLLLLLL Offset to next IFD [not going there]
607: }
608:
1.91 paf 609: static Value* parse_exif(Measure_reader& reader, const String& origin_string) {
610: const char* buf;
611: if(reader.read(buf, sizeof(JPG_Exif_segment_begin))<sizeof(JPG_Exif_segment_begin))
1.118 misha 612: throw Exception(IMAGE_FORMAT,
1.91 paf 613: &origin_string,
1.80 paf 614: "not JPEG file - can not fully read Exif segment start");
615:
1.91 paf 616: JPG_Exif_segment_begin *start=(JPG_Exif_segment_begin *)buf;
1.80 paf 617: if(memcmp(start->signature, "Exif\0\0", 4+2)!=0) //signature invalid?
618: return 0; // ignore invalid block
619:
620: uint tiff_base=reader.tell();
621: if(reader.read(buf, sizeof(JPG_Exif_TIFF_header))<sizeof(JPG_Exif_TIFF_header))
622: return 0;
623:
624: JPG_Exif_TIFF_header *head=(JPG_Exif_TIFF_header *)buf;
625: bool is_big=head->byte_align_identifier[0]=='M'; // [M]otorola vs [I]ntel
626:
627: uint first_IFD_offset=endian_to_uint(is_big, head->first_IFD_offset);
628: reader.seek(tiff_base+first_IFD_offset, SEEK_SET);
629:
1.91 paf 630: VHash* vhash=new VHash;
1.80 paf 631:
632: // IFD
1.91 paf 633: parse_IFD(vhash->hash(), is_big, reader, tiff_base);
1.80 paf 634:
1.91 paf 635: return vhash;
1.80 paf 636: }
637:
1.91 paf 638: static void measure_jpeg(const String& origin_string,
639: Measure_reader& reader, ushort& width, ushort& height, Value** exif) {
1.2 paf 640: // JFIF format markers
1.80 paf 641: const uchar MARKER=0xFF;
642: const uchar CODE_SIZE_A=0xC0;
643: const uchar CODE_SIZE_B=0xC1;
644: const uchar CODE_SIZE_C=0xC2;
645: const uchar CODE_SIZE_D=0xC3;
646: const uchar CODE_EXIF=0xE1;
1.2 paf 647:
1.91 paf 648: const char* buf;
1.18 paf 649: const size_t prefix_size=2;
1.31 parser 650: if(reader.read(buf, prefix_size)<prefix_size)
1.118 misha 651: throw Exception(IMAGE_FORMAT,
1.91 paf 652: &origin_string,
1.34 parser 653: "not JPEG file - too small");
1.80 paf 654: uchar *signature=(uchar *)buf;
1.1 paf 655:
1.31 parser 656: if(!(signature[0]==0xFF && signature[1]==0xD8))
1.118 misha 657: throw Exception(IMAGE_FORMAT,
1.91 paf 658: &origin_string,
1.44 parser 659: "not JPEG file - wrong signature");
1.31 parser 660:
661: while(true) {
1.80 paf 662: uint segment_base=reader.tell()+2/*marker,code*/;
1.31 parser 663: if(reader.read(buf, sizeof(JPG_Segment_head))<sizeof(JPG_Segment_head))
1.79 paf 664: break;
1.31 parser 665: JPG_Segment_head *head=(JPG_Segment_head *)buf;
666:
667: // Verify that it's a valid segment.
668: if(head->marker!=MARKER)
1.118 misha 669: throw Exception(IMAGE_FORMAT,
1.91 paf 670: &origin_string,
1.79 paf 671: "not JPEG file - marker not found");
672:
673: switch(head->code) {
1.118 misha 674: // http://park2.wakwak.com/~tsuruzoh/Computer/Digicams/exif-e.html
1.79 paf 675: case CODE_EXIF:
1.80 paf 676: if(exif && !*exif) // seen .jpg with some xml under EXIF tag, after real exif block :)
1.91 paf 677: *exif=parse_exif(reader, origin_string);
1.1 paf 678: break;
1.31 parser 679:
1.79 paf 680: case CODE_SIZE_A:
681: case CODE_SIZE_B:
682: case CODE_SIZE_C:
683: case CODE_SIZE_D:
684: {
685: // Segments that contain size info
686: if(reader.read(buf, sizeof(JPG_Size_segment_body))<sizeof(JPG_Size_segment_body))
1.118 misha 687: throw Exception(IMAGE_FORMAT,
1.91 paf 688: &origin_string,
1.79 paf 689: "not JPEG file - can not fully read Size segment");
690: JPG_Size_segment_body *body=(JPG_Size_segment_body *)buf;
691:
1.80 paf 692: width=endian_to_ushort(true, body->width);
693: height=endian_to_ushort(true, body->height);
1.79 paf 694: }
1.80 paf 695: return;
1.79 paf 696: };
697:
1.80 paf 698: reader.seek(segment_base+endian_to_ushort(true, head->length), SEEK_SET);
1.31 parser 699: }
700:
1.118 misha 701: throw Exception(IMAGE_FORMAT,
1.91 paf 702: &origin_string,
1.79 paf 703: "broken JPEG file - size frame not found");
1.1 paf 704: }
705:
1.91 paf 706: static void measure_png(const String& origin_string,
1.78 paf 707: Measure_reader& reader, ushort& width, ushort& height) {
1.72 paf 708:
1.91 paf 709: const char* buf;
1.102 paf 710: const size_t head_size=sizeof(PNG_Header);
711: if(reader.read(buf, head_size)<head_size)
1.118 misha 712: throw Exception(IMAGE_FORMAT,
1.91 paf 713: &origin_string,
1.72 paf 714: "not PNG file - too small");
715: PNG_Header *head=(PNG_Header *)buf;
716:
717: if(strncmp(head->signature, "IHDR", 4)!=0)
1.118 misha 718: throw Exception(IMAGE_FORMAT,
1.91 paf 719: &origin_string,
1.72 paf 720: "not PNG file - wrong signature");
721:
1.80 paf 722: width=endian_to_ushort(true, head->width);
723: height=endian_to_ushort(true, head->height);
1.72 paf 724: }
725:
1.1 paf 726: // measure center
727:
1.91 paf 728: static void measure(const String& file_name,
729: Measure_reader& reader, ushort& width, ushort& height, Value** exif) {
730: const char* file_name_cstr=file_name.cstr(String::L_FILE_SPEC);
731: if(const char* cext=strrchr(file_name_cstr, '.')) {
1.1 paf 732: cext++;
733: if(strcasecmp(cext, "GIF")==0)
1.91 paf 734: measure_gif(file_name, reader, width, height);
1.1 paf 735: else if(strcasecmp(cext, "JPG")==0 || strcasecmp(cext, "JPEG")==0)
1.91 paf 736: measure_jpeg(file_name, reader, width, height, exif);
1.72 paf 737: else if(strcasecmp(cext, "PNG")==0)
1.91 paf 738: measure_png(file_name, reader, width, height);
1.1 paf 739: else
1.118 misha 740: throw Exception(IMAGE_FORMAT,
1.1 paf 741: &file_name,
742: "unhandled image file name extension '%s'", cext);
743: } else
1.118 misha 744: throw Exception(IMAGE_FORMAT,
1.1 paf 745: &file_name,
746: "can not determine image type - no file name extension");
747: }
748:
1.77 paf 749: // methods
1.1 paf 750:
1.40 parser 751: #ifndef DOXYGEN
1.77 paf 752: struct File_measure_action_info {
1.91 paf 753: ushort* width;
754: ushort* height;
755: Value** exif;
756: const String* file_name;
1.1 paf 757: };
1.40 parser 758: #endif
1.91 paf 759: static void file_measure_action(
1.98 paf 760: struct stat& /*finfo*/, int f,
761: const String& /*file_spec*/, const char* fname, bool /*as_text*/,
1.77 paf 762: void *context) {
763: File_measure_action_info& info=*static_cast<File_measure_action_info *>(context);
1.1 paf 764:
1.91 paf 765: Measure_file_reader reader(f, *info.file_name, fname);
766: measure(*info.file_name, reader, *info.width, *info.height, info.exif);
1.1 paf 767: }
768:
1.91 paf 769: static void _measure(Request& r, MethodParams& params) {
770: Value& data=params.as_no_junction(0, "data must not be code");
1.1 paf 771:
1.78 paf 772: ushort width=0;
773: ushort height=0;
1.91 paf 774: Value* exif=0;
775: const String* file_name;
1.100 paf 776: if((file_name=data.get_string())) {
777: File_measure_action_info info={
778: &width, &height,
779: &exif,
780: file_name
781: };
1.91 paf 782: file_read_action_under_lock(r.absolute(*file_name),
1.77 paf 783: "measure", file_measure_action, &info);
1.1 paf 784: } else {
1.91 paf 785: VFile* vfile=data.as_vfile();
786: file_name=&vfile->fields().get(name_name)->as_string();
1.77 paf 787: Measure_buf_reader reader(
1.91 paf 788: vfile->value_ptr(),
789: vfile->value_size(),
1.77 paf 790: *file_name
791: );
1.91 paf 792: measure(*file_name, reader, width, height, &exif);
1.1 paf 793: }
794:
1.91 paf 795: GET_SELF(r, VImage).set(file_name, width, height, 0, exif);
1.1 paf 796: }
797:
1.40 parser 798: #ifndef DOXYGEN
1.4 paf 799: struct Attrib_info {
1.91 paf 800: String* tag; ///< html tag being constructed
801: HashStringValue* skip; ///< tag attributes not to append to tag string [to skip]
1.4 paf 802: };
1.40 parser 803: #endif
1.91 paf 804: static void append_attrib_pair(
805: HashStringValue::key_type key,
806: HashStringValue::value_type value,
807: Attrib_info* info) {
1.49 parser 808: // skip user-specified and internal(starting with "line-") attributes
1.91 paf 809: if(info->skip && info->skip->get(key) || key.pos("line-")==0)
1.4 paf 810: return;
811:
1.3 paf 812: // src="a.gif" width=123 ismap[=-1]
1.91 paf 813: *info->tag << " " << key;
814: if(value->is_string() || value->as_int()>=0)
815: *info->tag << "=\"" << value->as_string() << "\"";
1.3 paf 816: }
1.91 paf 817: static void _html(Request& r, MethodParams& params) {
1.3 paf 818:
1.91 paf 819: String tag;
1.3 paf 820: tag << "<img";
1.4 paf 821:
1.91 paf 822: const HashStringValue& fields=GET_SELF(r, VImage).fields();
823: HashStringValue* attribs=0;
1.4 paf 824:
1.91 paf 825: if(params.count()) {
1.69 paf 826: // for backward compatibility: someday was ^html{}
1.91 paf 827: Value& vattribs=r.process_to_value(params[0],
1.52 parser 828: false/*don't intercept string*/);
1.82 paf 829: if(!vattribs.is_string()) // allow empty
1.100 paf 830: if((attribs=vattribs.get_hash())) {
831: Attrib_info info={&tag, 0};
1.114 paf 832: attribs->for_each<Attrib_info*>(append_attrib_pair, &info);
1.39 parser 833: } else
1.115 misha 834: throw Exception(PARSER_RUNTIME,
1.91 paf 835: 0,
1.39 parser 836: "attributes must be hash");
837: }
1.4 paf 838:
1.91 paf 839: {
840: Attrib_info info={&tag, attribs};
1.114 paf 841: fields.for_each<Attrib_info*>(append_attrib_pair, &info);
1.91 paf 842: }
1.6 paf 843: tag << " />";
1.3 paf 844: r.write_pass_lang(tag);
845: }
1.8 paf 846:
1.68 paf 847: /// @test wrap FILE to auto-object
1.91 paf 848: static gdImage* load(Request& r,
1.16 paf 849: const String& file_name){
1.91 paf 850: const char* file_name_cstr=r.absolute(file_name).cstr(String::L_FILE_SPEC);
1.16 paf 851: if(FILE *f=fopen(file_name_cstr, "rb")) {
1.91 paf 852: gdImage* image=new gdImage;
853: bool ok=image->CreateFromGif(f);
1.16 paf 854: fclose(f);
1.23 paf 855: if(!ok)
1.118 misha 856: throw Exception(IMAGE_FORMAT,
1.23 paf 857: &file_name,
858: "is not in GIF format");
1.91 paf 859: return image;
1.16 paf 860: } else {
1.68 paf 861: throw Exception("file.missing",
1.91 paf 862: 0,
1.16 paf 863: "can not open '%s'", file_name_cstr);
864: }
865: }
866:
867:
1.91 paf 868: static void _load(Request& r, MethodParams& params) {
1.116 misha 869: const String& file_name=params.as_string(0, FILE_NAME_MUST_NOT_BE_CODE);
1.6 paf 870:
1.91 paf 871: gdImage* image=load(r, file_name);
872: GET_SELF(r, VImage).set(&file_name, image->SX(), image->SY(), image);
1.6 paf 873: }
874:
1.91 paf 875: static void _create(Request& r, MethodParams& params) {
876: int width=params.as_int(0, "width must be int", r);
877: int height=params.as_int(1, "height must be int", r);
1.8 paf 878: int bgcolor_value=0xffFFff;
1.91 paf 879: if(params.count()>2)
880: bgcolor_value=params.as_int(2, "color must be int", r);
881: gdImage* image=new gdImage;
882: image->Create(width, height);
883: image->FilledRectangle(0, 0, width-1, height-1, image->Color(bgcolor_value));
884: GET_SELF(r, VImage).set(0, width, height, image);
1.6 paf 885: }
886:
1.91 paf 887: static void _gif(Request& r, MethodParams& params) {
1.108 paf 888: gdImage& image=GET_SELF(r, VImage).image();
1.6 paf 889:
1.95 paf 890: const String *file_name=0;
891: if(params.count()>0)
1.116 misha 892: file_name=¶ms.as_string(0, FILE_NAME_MUST_BE_STRING);
1.10 paf 893:
1.108 paf 894: gdBuf buf=image.Gif();
1.6 paf 895:
1.91 paf 896: VFile& vfile=*new VFile;
897: Value* content_type=new VString(*new String("image/gif"));
1.20 paf 898: vfile.set(false/*not tainted*/,
1.95 paf 899: (const char*)buf.ptr, buf.size,
900: file_name? file_name->cstr(String::L_FILE_SPEC): 0,
901: content_type);
1.6 paf 902:
903: r.write_no_lang(vfile);
904: }
905:
1.91 paf 906: static void _line(Request& r, MethodParams& params) {
1.108 paf 907: gdImage& image=GET_SELF(r, VImage).image();
1.12 paf 908:
1.108 paf 909: image.Line(
1.91 paf 910: params.as_int(0, "x0 must be int", r),
911: params.as_int(1, "y0 must be int", r),
912: params.as_int(2, "x1 must be int", r),
913: params.as_int(3, "y1 must be int", r),
1.108 paf 914: image.Color(params.as_int(4, "color must be int", r)));
1.13 paf 915: }
916:
1.91 paf 917: static void _fill(Request& r, MethodParams& params) {
1.108 paf 918: gdImage& image=GET_SELF(r, VImage).image();
1.12 paf 919:
1.108 paf 920: image.Fill(
1.91 paf 921: params.as_int(0, "x must be int", r),
922: params.as_int(1, "y must be int", r),
1.108 paf 923: image.Color(params.as_int(2, "color must be int", r)));
1.13 paf 924: }
925:
1.91 paf 926: static void _rectangle(Request& r, MethodParams& params) {
1.108 paf 927: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 928:
1.108 paf 929: image.Rectangle(
1.91 paf 930: params.as_int(0, "x0 must be int", r),
931: params.as_int(1, "y0 must be int", r),
932: params.as_int(2, "x1 must be int", r),
933: params.as_int(3, "y1 must be int", r),
1.108 paf 934: image.Color(params.as_int(4, "color must be int", r)));
1.13 paf 935: }
936:
1.91 paf 937: static void _bar(Request& r, MethodParams& params) {
1.108 paf 938: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 939:
1.108 paf 940: image.FilledRectangle(
1.91 paf 941: params.as_int(0, "x0 must be int", r),
942: params.as_int(1, "y0 must be int", r),
943: params.as_int(2, "x1 must be int", r),
944: params.as_int(3, "y1 must be int", r),
1.108 paf 945: image.Color(params.as_int(4, "color must be int", r)));
1.13 paf 946: }
947:
1.44 parser 948: #ifndef DOXYGEN
1.91 paf 949: static void add_point(Table::element_type row,
950: gdImage::Point **p) {
1.110 paf 951: if(row->count()!=2)
952: throw Exception(0,
953: 0,
954: "coordinates table must contain two columns: x and y values");
1.91 paf 955: (**p).x=row->get(0)->as_int();
956: (**p).y=row->get(1)->as_int();
1.44 parser 957: (*p)++;
958: }
959: #endif
1.91 paf 960: static void _replace(Request& r, MethodParams& params) {
1.108 paf 961: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 962:
1.116 misha 963: Table* table=params.as_no_junction(2, COORDINATES_MUST_NOT_BE_CODE).get_table();
1.44 parser 964: if(!table)
1.119 misha 965: throw Exception(PARSER_RUNTIME,
1.91 paf 966: 0,
1.44 parser 967: "coordinates must be table");
1.13 paf 968:
1.92 paf 969: gdImage::Point *all_p=new(PointerFreeGC) gdImage::Point[table->count()];
1.44 parser 970: gdImage::Point *add_p=all_p;
971: table->for_each(add_point, &add_p);
1.108 paf 972: image.FilledPolygonReplaceColor(all_p, table->count(),
973: image.Color(params.as_int(0, "src color must be int", r)),
974: image.Color(params.as_int(1, "dest color must be int", r)));
1.13 paf 975: }
976:
1.91 paf 977: static void _polyline(Request& r, MethodParams& params) {
1.108 paf 978: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 979:
1.116 misha 980: Table* table=params.as_no_junction(1, COORDINATES_MUST_NOT_BE_CODE).get_table();
1.44 parser 981: if(!table)
1.119 misha 982: throw Exception(PARSER_RUNTIME,
1.91 paf 983: 0,
1.44 parser 984: "coordinates must be table");
985:
1.92 paf 986: gdImage::Point* all_p=new(PointerFreeGC) gdImage::Point[table->count()];
1.44 parser 987: gdImage::Point *add_p=all_p;
988: table->for_each(add_point, &add_p);
1.108 paf 989: image.Polygon(all_p, table->count(),
990: image.Color(params.as_int(0, "color must be int", r)),
1.44 parser 991: false/*not closed*/);
992: }
993:
1.91 paf 994: static void _polygon(Request& r, MethodParams& params) {
1.108 paf 995: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 996:
1.116 misha 997: Table* table=params.as_no_junction(1, COORDINATES_MUST_NOT_BE_CODE).get_table();
1.44 parser 998: if(!table)
1.119 misha 999: throw Exception(PARSER_RUNTIME,
1.91 paf 1000: 0,
1.44 parser 1001: "coordinates must be table");
1002:
1.92 paf 1003: gdImage::Point* all_p=new(PointerFreeGC) gdImage::Point[table->count()];
1.44 parser 1004: gdImage::Point *add_p=all_p;
1005: table->for_each(add_point, &add_p);
1.108 paf 1006: image.Polygon(all_p, table->count(),
1007: image.Color(params.as_int(0, "color must be int", r)));
1.13 paf 1008: }
1009:
1.91 paf 1010: static void _polybar(Request& r, MethodParams& params) {
1.108 paf 1011: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 1012:
1.116 misha 1013: Table* table=params.as_no_junction(1, COORDINATES_MUST_NOT_BE_CODE).get_table();
1.44 parser 1014: if(!table)
1.115 misha 1015: throw Exception(PARSER_RUNTIME,
1.91 paf 1016: 0,
1.44 parser 1017: "coordinates must be table");
1.13 paf 1018:
1.92 paf 1019: gdImage::Point* all_p=new(PointerFreeGC) gdImage::Point[table->count()];
1.44 parser 1020: gdImage::Point *add_p=all_p;
1021: table->for_each(add_point, &add_p);
1.108 paf 1022: image.FilledPolygon(all_p, table->count(),
1023: image.Color(params.as_int(0, "color must be int", r)));
1.12 paf 1024: }
1025:
1.16 paf 1026: // font
1027:
1.85 paf 1028: #define Y(y)(y+index*height)
1.21 paf 1029:
1.91 paf 1030: // Font class
1031:
1032: const int Font::letter_spacing=1;
1033:
1034: Font::Font(//,
1035: const String& aalphabet,
1036: gdImage* aifont, int aheight, int amonospace, int aspacebarspace):
1037: height(aheight), monospace(amonospace), spacebarspace(aspacebarspace),
1.100 paf 1038: ifont(aifont),
1039: alphabet(aalphabet) {
1.91 paf 1040: }
1041:
1042: /* ******************************** char ********************************** */
1043:
1044: size_t Font::index_of(char ch) {
1045: if(ch==' ') return STRING_NOT_FOUND;
1046: return alphabet.pos(ch);
1047: }
1048:
1049: int Font::index_width(size_t index) {
1050: if(index==STRING_NOT_FOUND)
1051: return spacebarspace;
1052: int tr=ifont->GetTransparent();
1053: for(int x=ifont->SX()-1; x>=0; x--) {
1054: for(int y=0; y<height; y++)
1055: if(ifont->GetPixel(x, Y(y))!=tr)
1056: return x+1;
1.16 paf 1057: }
1.91 paf 1058: return 0;
1059: }
1060:
1.108 paf 1061: void Font::index_display(gdImage& image, int x, int y, size_t index){
1.91 paf 1062: if(index!=STRING_NOT_FOUND)
1.108 paf 1063: ifont->Copy(image, x, y, 0, Y(0), index_width(index), height);
1.91 paf 1064: }
1065:
1066: /* ******************************** string ********************************** */
1067:
1068: int Font::step_width(int index) {
1069: return letter_spacing + (monospace ? monospace : index_width(index));
1070: }
1071:
1072: // counts trailing letter_spacing, consider this OK. useful for contiuations
1073: int Font::string_width(const String& s){
1074: const char* cstr=s.cstr();
1075: int result=0;
1076: for(const char* current=cstr; *current; current++)
1077: result+=step_width(index_of(*current));
1078: return result;
1079: }
1080:
1.108 paf 1081: void Font::string_display(gdImage& image, int x, int y, const String& s){
1.91 paf 1082: const char* cstr=s.cstr();
1083: for(const char* current=cstr; *current; current++) {
1084: size_t index=index_of(*current);
1085: index_display(image, x, y, index);
1086: x+=step_width(index);
1.87 paf 1087: }
1.91 paf 1088: }
1.87 paf 1089:
1.91 paf 1090: //
1.35 parser 1091:
1.16 paf 1092:
1.91 paf 1093: static void _font(Request& r, MethodParams& params) {
1094: const String& alphabet=params.as_string(0, "alphabet must not be code");
1.117 misha 1095: gdImage* image=load(r, params.as_string(1, FILE_NAME_MUST_NOT_BE_CODE));
1.91 paf 1096: int spacebar_width=params.as_int(2, "spacebar_width must be int", r);
1.37 parser 1097: int monospace_width;
1.91 paf 1098: if(params.count()>3) {
1099: monospace_width=params.as_int(3, "monospace_width must be int", r);
1.37 parser 1100: if(!monospace_width)
1.91 paf 1101: monospace_width=image->SX();
1.37 parser 1102: } else
1103: monospace_width=0;
1.16 paf 1104:
1.91 paf 1105: if(!alphabet.length())
1.115 misha 1106: throw Exception(PARSER_RUNTIME,
1.91 paf 1107: 0,
1.37 parser 1108: "alphabet must not be empty");
1.84 paf 1109:
1.91 paf 1110: if(int remainder=image->SY() % alphabet.length())
1.115 misha 1111: throw Exception(PARSER_RUNTIME,
1.91 paf 1112: 0,
1.84 paf 1113: "font-file height(%d) not divisable by alphabet size(%d), remainder=%d",
1.91 paf 1114: image->SY(), alphabet.length(), remainder);
1.37 parser 1115:
1.108 paf 1116: GET_SELF(r, VImage).set_font(new Font(
1.37 parser 1117: alphabet,
1.36 parser 1118: image,
1.108 paf 1119: image->SY() / alphabet.length(), monospace_width, spacebar_width));
1.16 paf 1120: }
1121:
1.91 paf 1122: static void _text(Request& r, MethodParams& params) {
1123: int x=params.as_int(0, "x must be int", r);
1124: int y=params.as_int(1, "y must be int", r);
1125: const String& s=params.as_string(2, "text must not be code");
1.16 paf 1126:
1.91 paf 1127: VImage& vimage=GET_SELF(r, VImage);
1.108 paf 1128: vimage.font().string_display(vimage.image(), x, y, s);
1.16 paf 1129: }
1130:
1.91 paf 1131: static void _length(Request& r, MethodParams& params) {
1132: const String& s=params.as_string(0, "text must not be code");
1.47 parser 1133:
1.91 paf 1134: VImage& vimage=GET_SELF(r, VImage);
1.108 paf 1135: r.write_no_lang(*new VInt(vimage.font().string_width(s)));
1.47 parser 1136: }
1137:
1.91 paf 1138: static void _arc(Request& r, MethodParams& params) {
1.108 paf 1139: gdImage& image=GET_SELF(r, VImage).image();
1.48 parser 1140:
1.108 paf 1141: image.Arc(
1.91 paf 1142: params.as_int(0, "center_x must be int", r),
1143: params.as_int(1, "center_y must be int", r),
1144: params.as_int(2, "width must be int", r),
1145: params.as_int(3, "height must be int", r),
1146: params.as_int(4, "start degrees must be int", r),
1147: params.as_int(5, "end degrees must be int", r),
1.108 paf 1148: image.Color(params.as_int(6, "cx must be int", r)));
1.48 parser 1149: }
1150:
1.91 paf 1151: static void _sector(Request& r, MethodParams& params) {
1.108 paf 1152: gdImage& image=GET_SELF(r, VImage).image();
1.49 parser 1153:
1.108 paf 1154: image.Sector(
1.91 paf 1155: params.as_int(0, "center_x must be int", r),
1156: params.as_int(1, "center_y must be int", r),
1157: params.as_int(2, "width must be int", r),
1158: params.as_int(3, "height must be int", r),
1159: params.as_int(4, "start degrees must be int", r),
1160: params.as_int(5, "end degrees must be int", r),
1.108 paf 1161: image.Color(params.as_int(6, "color must be int", r)));
1.49 parser 1162: }
1163:
1.91 paf 1164: static void _circle(Request& r, MethodParams& params) {
1.108 paf 1165: gdImage& image=GET_SELF(r, VImage).image();
1.48 parser 1166:
1.91 paf 1167: int size=params.as_int(2, "radius must be int", r)*2;
1.108 paf 1168: image.Arc(
1.91 paf 1169: params.as_int(0, "center_x must be int", r),
1170: params.as_int(1, "center_y must be int", r),
1.50 parser 1171: size, //w
1172: size, //h
1.48 parser 1173: 0, //s
1174: 360, //e
1.108 paf 1175: image.Color(params.as_int(3, "color must be int", r)));
1.48 parser 1176: }
1177:
1.108 paf 1178: gdImage& as_image(MethodParams& params, int index, const char* msg) {
1.91 paf 1179: Value& value=params.as_no_junction(index, msg);
1.53 parser 1180:
1.91 paf 1181: if(Value* vimage=value.as(VIMAGE_TYPE, false)) {
1.108 paf 1182: return static_cast<VImage *>(vimage)->image();
1.75 paf 1183: } else
1.115 misha 1184: throw Exception(PARSER_RUNTIME,
1.91 paf 1185: 0,
1.53 parser 1186: msg);
1187: }
1188:
1.91 paf 1189: static void _copy(Request& r, MethodParams& params) {
1.108 paf 1190: gdImage& dest=GET_SELF(r, VImage).image();
1.53 parser 1191:
1.108 paf 1192: gdImage& src=as_image(params, 0, "src must be image");
1.53 parser 1193:
1.91 paf 1194: int sx=params.as_int(1, "src_x must be int", r);
1195: int sy=params.as_int(2, "src_y must be int", r);
1196: int sw=params.as_int(3, "src_w must be int", r);
1197: int sh=params.as_int(4, "src_h must be int", r);
1198: int dx=params.as_int(5, "dest_x must be int", r);
1199: int dy=params.as_int(6, "dest_y must be int", r);
1200: if(params.count()>1+2+2+2) {
1201: int dw=params.as_int(1+2+2+2, "dest_w must be int", r);
1202: int dh=(int)(params.count()>1+2+2+2+1?
1203: params.as_int(1+2+2+2+1, "dest_h must be int", r):sh*(((double)dw)/((double)sw)));
1204: int tolerance=params.count()>1+2+2+2+2?
1205: params.as_int(1+2+2+2+2, "tolerance must be int", r):150;
1.53 parser 1206:
1.108 paf 1207: src.CopyResampled(dest, dx, dy, sx, sy, dw, dh, sw, sh, tolerance);
1.53 parser 1208: } else
1.108 paf 1209: src.Copy(dest, dx, dy, sx, sy, sw, sh);
1210: }
1211:
1212: static void _pixel(Request& r, MethodParams& params) {
1213: gdImage& image=GET_SELF(r, VImage).image();
1214:
1.109 paf 1215: int x=params.as_int(0, "x must be int", r);
1216: int y=params.as_int(1, "y must be int", r);
1217:
1218: if(params.count()>2) {
1219: image.SetPixel(x, y,
1220: image.Color(params.as_int(2, "color must be int", r)));
1221: } else
1222: r.write_no_lang(*new VInt(image.DecodeColor(image.GetPixel(x, y))));
1.53 parser 1223: }
1224:
1225:
1.22 paf 1226: // constructor
1227:
1.91 paf 1228: MImage::MImage(): Methoded("image") {
1.1 paf 1229: // ^image:measure[DATA]
1.22 paf 1230: add_native_method("measure", Method::CT_DYNAMIC, _measure, 1, 1);
1.3 paf 1231:
1.25 paf 1232: // ^image.html[]
1233: // ^image.html[hash]
1.22 paf 1234: add_native_method("html", Method::CT_DYNAMIC, _html, 0, 1);
1.6 paf 1235:
1.25 paf 1236: // ^image.load[background.gif]
1.22 paf 1237: add_native_method("load", Method::CT_DYNAMIC, _load, 1, 1);
1.6 paf 1238:
1.25 paf 1239: // ^image.create[width;height] bgcolor=white
1240: // ^image.create[width;height;bgcolor]
1.22 paf 1241: add_native_method("create", Method::CT_DYNAMIC, _create, 2, 3);
1.6 paf 1242:
1.25 paf 1243: // ^image.gif[]
1.95 paf 1244: add_native_method("gif", Method::CT_DYNAMIC, _gif, 0, 1);
1.12 paf 1245:
1.25 paf 1246: // ^image.line(x0;y0;x1;y1;color)
1.22 paf 1247: add_native_method("line", Method::CT_DYNAMIC, _line, 5, 5);
1.13 paf 1248:
1.25 paf 1249: // ^image.fill(x;y;color)
1.22 paf 1250: add_native_method("fill", Method::CT_DYNAMIC, _fill, 3, 3);
1.13 paf 1251:
1.25 paf 1252: // ^image.rectangle(x0;y0;x1;y1;color)
1.22 paf 1253: add_native_method("rectangle", Method::CT_DYNAMIC, _rectangle, 5, 5);
1.13 paf 1254:
1.25 paf 1255: // ^image.bar(x0;y0;x1;y1;color)
1.22 paf 1256: add_native_method("bar", Method::CT_DYNAMIC, _bar, 5, 5);
1.13 paf 1257:
1.44 parser 1258: // ^image.replace(color-source;color-dest)[table x:y]
1259: add_native_method("replace", Method::CT_DYNAMIC, _replace, 3, 3);
1260:
1261: // ^image.polyline(color)[table x:y]
1262: add_native_method("polyline", Method::CT_DYNAMIC, _polyline, 2, 2);
1.13 paf 1263:
1.44 parser 1264: // ^image.polygon(color)[table x:y]
1265: add_native_method("polygon", Method::CT_DYNAMIC, _polygon, 2, 2);
1.13 paf 1266:
1.44 parser 1267: // ^image.polybar(color)[table x:y]
1268: add_native_method("polybar", Method::CT_DYNAMIC, _polybar, 2, 2);
1.13 paf 1269:
1.36 parser 1270: // ^image.font[alPHAbet;font-file-name.gif](spacebar_width)
1271: // ^image.font[alPHAbet;font-file-name.gif](spacebar_width;width)
1272: add_native_method("font", Method::CT_DYNAMIC, _font, 3, 4);
1.16 paf 1273:
1.25 paf 1274: // ^image.text(x;y)[text]
1.22 paf 1275: add_native_method("text", Method::CT_DYNAMIC, _text, 3, 3);
1.47 parser 1276:
1277: // ^image.ngth[text]
1278: add_native_method("length", Method::CT_DYNAMIC, _length, 1, 1);
1.16 paf 1279:
1.48 parser 1280: // ^image.arc(center x;center y;width;height;start in degrees;end in degrees;color)
1281: add_native_method("arc", Method::CT_DYNAMIC, _arc, 7, 7);
1.49 parser 1282:
1283: // ^image.sector(center x;center y;width;height;start in degrees;end in degrees;color)
1284: add_native_method("sector", Method::CT_DYNAMIC, _sector, 7, 7);
1.48 parser 1285:
1286: // ^image.circle(center x;center y;r;color)
1287: add_native_method("circle", Method::CT_DYNAMIC, _circle, 4, 4);
1288:
1.56 parser 1289: // ^image.copy[source](src x;src y;src w;src h;dst x;dst y[;dest w[;dest h[;tolerance]]])
1290: add_native_method("copy", Method::CT_DYNAMIC, _copy, 1+2+2+2, (1+2+2+2)+2+1);
1.108 paf 1291:
1292: // ^image.pixel(x;y)[(color)]
1.109 paf 1293: add_native_method("pixel", Method::CT_DYNAMIC, _pixel, 2, 3);
1.1 paf 1294: }
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