Annotation of parser3/src/classes/image.C, revision 1.122
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:
1.122 ! misha 8: static const char * const IDENT_IMAGE_C="$Date: 2009-04-22 21:28:52 $";
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:
1.122 ! misha 487: return new VString(*new String(cstr, true/*tainted*/));
1.80 paf 488: }
489:
490: if(components_count==1)
1.91 paf 491: return parse_IFD_entry_formatted_one_value(is_big, format, component_size, value);
1.80 paf 492:
1.91 paf 493: VHash* result=new VHash;
494: HashStringValue& hash=result->hash();
1.80 paf 495: for(uint i=0; i<components_count; i++, value+=component_size) {
1.91 paf 496: hash.put(
1.93 paf 497: String::Body::Format(i),
1.91 paf 498: parse_IFD_entry_formatted_one_value(is_big, format, component_size, value));
1.80 paf 499: }
500:
1.91 paf 501: return result;
1.80 paf 502: }
503:
1.91 paf 504: static Value* parse_IFD_entry_value(
1.80 paf 505: bool is_big, Measure_reader& reader, long tiff_base,
506: JPG_Exif_IFD_entry& entry) {
507: size_t format2component_size[]={
508: 0, // undefined
509: 1, // unsigned byte
510: 1, // ascii string
511: 2, // unsigned short
512: 4, // unsigned long
513: 8, // unsigned rational
514: 1, // signed byte
515: 0, // undefined
516: 2, // signed short
517: 4, // signed long
518: 8, // signed rational
519: /*
520: 4, // single float
521: 8, // double float
522: */
523: };
524:
525: ushort format=endian_to_ushort(is_big, entry.format);
526: if(format>=sizeof(format2component_size)/sizeof(format2component_size[0]))
527: return 0; // format out of range, ignoring
528:
529: size_t component_size=format2component_size[format];
530: if(component_size==0)
531: return 0; // undefined format
532:
533: // You can get the total data byte length by multiplies
534: // a 'bytes/components' value (see above chart) by number of components stored 'NNNNNNNN' area
535: uint components_count=endian_to_uint(is_big, entry.components_count);
1.121 misha 536: uint value_size=component_size*components_count;
1.80 paf 537: // If its size is over 4bytes, 'DDDDDDDD' contains the offset to data stored address
1.91 paf 538: Value* result;
1.80 paf 539:
540: if(value_size<=4)
1.91 paf 541: result=parse_IFD_entry_formatted_value(
1.80 paf 542: is_big, format,
543: component_size, components_count,
544: entry.value_or_offset_to_it);
545: else {
546: long remembered=reader.tell();
547: {
548: reader.seek(tiff_base+endian_to_uint(is_big, entry.value_or_offset_to_it), SEEK_SET);
1.91 paf 549: const char* value;
1.80 paf 550: if(reader.read(value, value_size)<sizeof(value_size))
551: return 0;
1.91 paf 552: result=parse_IFD_entry_formatted_value(
1.80 paf 553: is_big, format,
554: component_size, components_count,
555: (const uchar*)value);
556: }
557: reader.seek(remembered, SEEK_SET);
558: }
559:
560: return result;
561: }
562:
1.91 paf 563: static void parse_IFD(HashStringValue& hash,
1.118 misha 564: bool is_big, Measure_reader& reader, long tiff_base, bool gps=false);
1.91 paf 565:
566: static void parse_IFD_entry(HashStringValue& hash,
567: bool is_big, Measure_reader& reader, long tiff_base,
1.118 misha 568: JPG_Exif_IFD_entry& entry, bool gps=false) {
1.80 paf 569: ushort tag=endian_to_ushort(is_big, entry.tag);
1.118 misha 570:
571: if(tag==JPG_IFD_TAG_EXIF_OFFSET || tag==JPG_IFD_TAG_EXIF_GPS_OFFSET){
1.80 paf 572: long remembered=reader.tell();
573: {
574: reader.seek(tiff_base+endian_to_uint(is_big, entry.value_or_offset_to_it), SEEK_SET);
1.118 misha 575: parse_IFD(hash, is_big, reader, tiff_base, (tag==JPG_IFD_TAG_EXIF_GPS_OFFSET)?true:gps);
1.80 paf 576: }
577: reader.seek(remembered, SEEK_SET);
578: return;
579: }
1.118 misha 580:
1.91 paf 581: if(Value* value=parse_IFD_entry_value(is_big, reader, tiff_base, entry)) {
1.118 misha 582: if(const char* name=(gps)?exif_gps_tag_value2name.get(tag):exif_tag_value2name.get(tag))
1.93 paf 583: hash.put(String::Body(name), value);
1.80 paf 584: else
1.93 paf 585: hash.put(String::Body::Format(tag), value);
1.80 paf 586: }
1.1 paf 587: }
588:
1.91 paf 589: static void parse_IFD(
590: HashStringValue& hash,
1.118 misha 591: bool is_big, Measure_reader& reader, long tiff_base, bool gps) {
1.91 paf 592: const char* buf;
593: if(reader.read(buf, sizeof(JPG_Exif_IFD_begin))<sizeof(JPG_Exif_IFD_begin))
1.80 paf 594: return;
1.91 paf 595: JPG_Exif_IFD_begin *start=(JPG_Exif_IFD_begin *)buf;
1.80 paf 596:
597: ushort directory_entry_count=endian_to_ushort(is_big, start->directory_entry_count);
598: for(int i=0; i<directory_entry_count; i++) {
599: if(reader.read(buf, sizeof(JPG_Exif_IFD_entry))<sizeof(JPG_Exif_IFD_entry))
600: return;
601:
1.118 misha 602: parse_IFD_entry(hash, is_big, reader, tiff_base, *(JPG_Exif_IFD_entry *)buf, gps);
1.80 paf 603: }
604: // then goes: LLLLLLLL Offset to next IFD [not going there]
605: }
606:
1.91 paf 607: static Value* parse_exif(Measure_reader& reader, const String& origin_string) {
608: const char* buf;
609: if(reader.read(buf, sizeof(JPG_Exif_segment_begin))<sizeof(JPG_Exif_segment_begin))
1.118 misha 610: throw Exception(IMAGE_FORMAT,
1.91 paf 611: &origin_string,
1.80 paf 612: "not JPEG file - can not fully read Exif segment start");
613:
1.91 paf 614: JPG_Exif_segment_begin *start=(JPG_Exif_segment_begin *)buf;
1.80 paf 615: if(memcmp(start->signature, "Exif\0\0", 4+2)!=0) //signature invalid?
616: return 0; // ignore invalid block
617:
618: uint tiff_base=reader.tell();
619: if(reader.read(buf, sizeof(JPG_Exif_TIFF_header))<sizeof(JPG_Exif_TIFF_header))
620: return 0;
621:
622: JPG_Exif_TIFF_header *head=(JPG_Exif_TIFF_header *)buf;
623: bool is_big=head->byte_align_identifier[0]=='M'; // [M]otorola vs [I]ntel
624:
625: uint first_IFD_offset=endian_to_uint(is_big, head->first_IFD_offset);
626: reader.seek(tiff_base+first_IFD_offset, SEEK_SET);
627:
1.91 paf 628: VHash* vhash=new VHash;
1.80 paf 629:
630: // IFD
1.91 paf 631: parse_IFD(vhash->hash(), is_big, reader, tiff_base);
1.80 paf 632:
1.91 paf 633: return vhash;
1.80 paf 634: }
635:
1.91 paf 636: static void measure_jpeg(const String& origin_string,
637: Measure_reader& reader, ushort& width, ushort& height, Value** exif) {
1.2 paf 638: // JFIF format markers
1.80 paf 639: const uchar MARKER=0xFF;
640: const uchar CODE_SIZE_A=0xC0;
641: const uchar CODE_SIZE_B=0xC1;
642: const uchar CODE_SIZE_C=0xC2;
643: const uchar CODE_SIZE_D=0xC3;
644: const uchar CODE_EXIF=0xE1;
1.2 paf 645:
1.91 paf 646: const char* buf;
1.18 paf 647: const size_t prefix_size=2;
1.31 parser 648: if(reader.read(buf, prefix_size)<prefix_size)
1.118 misha 649: throw Exception(IMAGE_FORMAT,
1.91 paf 650: &origin_string,
1.34 parser 651: "not JPEG file - too small");
1.80 paf 652: uchar *signature=(uchar *)buf;
1.1 paf 653:
1.31 parser 654: if(!(signature[0]==0xFF && signature[1]==0xD8))
1.118 misha 655: throw Exception(IMAGE_FORMAT,
1.91 paf 656: &origin_string,
1.44 parser 657: "not JPEG file - wrong signature");
1.31 parser 658:
659: while(true) {
1.80 paf 660: uint segment_base=reader.tell()+2/*marker,code*/;
1.31 parser 661: if(reader.read(buf, sizeof(JPG_Segment_head))<sizeof(JPG_Segment_head))
1.79 paf 662: break;
1.31 parser 663: JPG_Segment_head *head=(JPG_Segment_head *)buf;
664:
665: // Verify that it's a valid segment.
666: if(head->marker!=MARKER)
1.118 misha 667: throw Exception(IMAGE_FORMAT,
1.91 paf 668: &origin_string,
1.79 paf 669: "not JPEG file - marker not found");
670:
671: switch(head->code) {
1.118 misha 672: // http://park2.wakwak.com/~tsuruzoh/Computer/Digicams/exif-e.html
1.79 paf 673: case CODE_EXIF:
1.80 paf 674: if(exif && !*exif) // seen .jpg with some xml under EXIF tag, after real exif block :)
1.91 paf 675: *exif=parse_exif(reader, origin_string);
1.1 paf 676: break;
1.31 parser 677:
1.79 paf 678: case CODE_SIZE_A:
679: case CODE_SIZE_B:
680: case CODE_SIZE_C:
681: case CODE_SIZE_D:
682: {
683: // Segments that contain size info
684: if(reader.read(buf, sizeof(JPG_Size_segment_body))<sizeof(JPG_Size_segment_body))
1.118 misha 685: throw Exception(IMAGE_FORMAT,
1.91 paf 686: &origin_string,
1.79 paf 687: "not JPEG file - can not fully read Size segment");
688: JPG_Size_segment_body *body=(JPG_Size_segment_body *)buf;
689:
1.80 paf 690: width=endian_to_ushort(true, body->width);
691: height=endian_to_ushort(true, body->height);
1.79 paf 692: }
1.80 paf 693: return;
1.79 paf 694: };
695:
1.80 paf 696: reader.seek(segment_base+endian_to_ushort(true, head->length), SEEK_SET);
1.31 parser 697: }
698:
1.118 misha 699: throw Exception(IMAGE_FORMAT,
1.91 paf 700: &origin_string,
1.79 paf 701: "broken JPEG file - size frame not found");
1.1 paf 702: }
703:
1.91 paf 704: static void measure_png(const String& origin_string,
1.78 paf 705: Measure_reader& reader, ushort& width, ushort& height) {
1.72 paf 706:
1.91 paf 707: const char* buf;
1.102 paf 708: const size_t head_size=sizeof(PNG_Header);
709: if(reader.read(buf, head_size)<head_size)
1.118 misha 710: throw Exception(IMAGE_FORMAT,
1.91 paf 711: &origin_string,
1.72 paf 712: "not PNG file - too small");
713: PNG_Header *head=(PNG_Header *)buf;
714:
715: if(strncmp(head->signature, "IHDR", 4)!=0)
1.118 misha 716: throw Exception(IMAGE_FORMAT,
1.91 paf 717: &origin_string,
1.72 paf 718: "not PNG file - wrong signature");
719:
1.80 paf 720: width=endian_to_ushort(true, head->width);
721: height=endian_to_ushort(true, head->height);
1.72 paf 722: }
723:
1.1 paf 724: // measure center
725:
1.91 paf 726: static void measure(const String& file_name,
727: Measure_reader& reader, ushort& width, ushort& height, Value** exif) {
728: const char* file_name_cstr=file_name.cstr(String::L_FILE_SPEC);
729: if(const char* cext=strrchr(file_name_cstr, '.')) {
1.1 paf 730: cext++;
731: if(strcasecmp(cext, "GIF")==0)
1.91 paf 732: measure_gif(file_name, reader, width, height);
1.1 paf 733: else if(strcasecmp(cext, "JPG")==0 || strcasecmp(cext, "JPEG")==0)
1.91 paf 734: measure_jpeg(file_name, reader, width, height, exif);
1.72 paf 735: else if(strcasecmp(cext, "PNG")==0)
1.91 paf 736: measure_png(file_name, reader, width, height);
1.1 paf 737: else
1.118 misha 738: throw Exception(IMAGE_FORMAT,
1.1 paf 739: &file_name,
740: "unhandled image file name extension '%s'", cext);
741: } else
1.118 misha 742: throw Exception(IMAGE_FORMAT,
1.1 paf 743: &file_name,
744: "can not determine image type - no file name extension");
745: }
746:
1.77 paf 747: // methods
1.1 paf 748:
1.40 parser 749: #ifndef DOXYGEN
1.77 paf 750: struct File_measure_action_info {
1.91 paf 751: ushort* width;
752: ushort* height;
753: Value** exif;
754: const String* file_name;
1.1 paf 755: };
1.40 parser 756: #endif
1.91 paf 757: static void file_measure_action(
1.98 paf 758: struct stat& /*finfo*/, int f,
759: const String& /*file_spec*/, const char* fname, bool /*as_text*/,
1.77 paf 760: void *context) {
761: File_measure_action_info& info=*static_cast<File_measure_action_info *>(context);
1.1 paf 762:
1.91 paf 763: Measure_file_reader reader(f, *info.file_name, fname);
764: measure(*info.file_name, reader, *info.width, *info.height, info.exif);
1.1 paf 765: }
766:
1.91 paf 767: static void _measure(Request& r, MethodParams& params) {
768: Value& data=params.as_no_junction(0, "data must not be code");
1.1 paf 769:
1.78 paf 770: ushort width=0;
771: ushort height=0;
1.91 paf 772: Value* exif=0;
773: const String* file_name;
1.100 paf 774: if((file_name=data.get_string())) {
775: File_measure_action_info info={
776: &width, &height,
777: &exif,
778: file_name
779: };
1.91 paf 780: file_read_action_under_lock(r.absolute(*file_name),
1.77 paf 781: "measure", file_measure_action, &info);
1.1 paf 782: } else {
1.91 paf 783: VFile* vfile=data.as_vfile();
784: file_name=&vfile->fields().get(name_name)->as_string();
1.77 paf 785: Measure_buf_reader reader(
1.91 paf 786: vfile->value_ptr(),
787: vfile->value_size(),
1.77 paf 788: *file_name
789: );
1.91 paf 790: measure(*file_name, reader, width, height, &exif);
1.1 paf 791: }
792:
1.91 paf 793: GET_SELF(r, VImage).set(file_name, width, height, 0, exif);
1.1 paf 794: }
795:
1.40 parser 796: #ifndef DOXYGEN
1.4 paf 797: struct Attrib_info {
1.91 paf 798: String* tag; ///< html tag being constructed
799: HashStringValue* skip; ///< tag attributes not to append to tag string [to skip]
1.4 paf 800: };
1.40 parser 801: #endif
1.91 paf 802: static void append_attrib_pair(
803: HashStringValue::key_type key,
804: HashStringValue::value_type value,
805: Attrib_info* info) {
1.49 parser 806: // skip user-specified and internal(starting with "line-") attributes
1.91 paf 807: if(info->skip && info->skip->get(key) || key.pos("line-")==0)
1.4 paf 808: return;
809:
1.3 paf 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{}
1.91 paf 825: Value& vattribs=r.process_to_value(params[0],
1.52 parser 826: false/*don't intercept string*/);
1.82 paf 827: if(!vattribs.is_string()) // allow empty
1.100 paf 828: if((attribs=vattribs.get_hash())) {
829: Attrib_info info={&tag, 0};
1.114 paf 830: attribs->for_each<Attrib_info*>(append_attrib_pair, &info);
1.39 parser 831: } else
1.115 misha 832: throw Exception(PARSER_RUNTIME,
1.91 paf 833: 0,
1.39 parser 834: "attributes must be hash");
835: }
1.4 paf 836:
1.91 paf 837: {
838: Attrib_info info={&tag, attribs};
1.114 paf 839: fields.for_each<Attrib_info*>(append_attrib_pair, &info);
1.91 paf 840: }
1.6 paf 841: tag << " />";
1.3 paf 842: r.write_pass_lang(tag);
843: }
1.8 paf 844:
1.68 paf 845: /// @test wrap FILE to auto-object
1.91 paf 846: static gdImage* load(Request& r,
1.16 paf 847: const String& file_name){
1.91 paf 848: const char* file_name_cstr=r.absolute(file_name).cstr(String::L_FILE_SPEC);
1.16 paf 849: if(FILE *f=fopen(file_name_cstr, "rb")) {
1.91 paf 850: gdImage* image=new gdImage;
851: bool ok=image->CreateFromGif(f);
1.16 paf 852: fclose(f);
1.23 paf 853: if(!ok)
1.118 misha 854: throw Exception(IMAGE_FORMAT,
1.23 paf 855: &file_name,
856: "is not in GIF format");
1.91 paf 857: return image;
1.16 paf 858: } else {
1.68 paf 859: throw Exception("file.missing",
1.91 paf 860: 0,
1.16 paf 861: "can not open '%s'", file_name_cstr);
862: }
863: }
864:
865:
1.91 paf 866: static void _load(Request& r, MethodParams& params) {
1.116 misha 867: const String& file_name=params.as_string(0, FILE_NAME_MUST_NOT_BE_CODE);
1.6 paf 868:
1.91 paf 869: gdImage* image=load(r, file_name);
870: GET_SELF(r, VImage).set(&file_name, image->SX(), image->SY(), image);
1.6 paf 871: }
872:
1.91 paf 873: static void _create(Request& r, MethodParams& params) {
874: int width=params.as_int(0, "width must be int", r);
875: int height=params.as_int(1, "height must be int", r);
1.8 paf 876: int bgcolor_value=0xffFFff;
1.91 paf 877: if(params.count()>2)
878: bgcolor_value=params.as_int(2, "color must be int", r);
879: gdImage* image=new gdImage;
880: image->Create(width, height);
881: image->FilledRectangle(0, 0, width-1, height-1, image->Color(bgcolor_value));
882: GET_SELF(r, VImage).set(0, width, height, image);
1.6 paf 883: }
884:
1.91 paf 885: static void _gif(Request& r, MethodParams& params) {
1.108 paf 886: gdImage& image=GET_SELF(r, VImage).image();
1.6 paf 887:
1.95 paf 888: const String *file_name=0;
889: if(params.count()>0)
1.116 misha 890: file_name=¶ms.as_string(0, FILE_NAME_MUST_BE_STRING);
1.10 paf 891:
1.108 paf 892: gdBuf buf=image.Gif();
1.6 paf 893:
1.91 paf 894: VFile& vfile=*new VFile;
895: Value* content_type=new VString(*new String("image/gif"));
1.20 paf 896: vfile.set(false/*not tainted*/,
1.95 paf 897: (const char*)buf.ptr, buf.size,
898: file_name? file_name->cstr(String::L_FILE_SPEC): 0,
899: content_type);
1.6 paf 900:
901: r.write_no_lang(vfile);
902: }
903:
1.91 paf 904: static void _line(Request& r, MethodParams& params) {
1.108 paf 905: gdImage& image=GET_SELF(r, VImage).image();
1.12 paf 906:
1.108 paf 907: image.Line(
1.91 paf 908: params.as_int(0, "x0 must be int", r),
909: params.as_int(1, "y0 must be int", r),
910: params.as_int(2, "x1 must be int", r),
911: params.as_int(3, "y1 must be int", r),
1.108 paf 912: image.Color(params.as_int(4, "color must be int", r)));
1.13 paf 913: }
914:
1.91 paf 915: static void _fill(Request& r, MethodParams& params) {
1.108 paf 916: gdImage& image=GET_SELF(r, VImage).image();
1.12 paf 917:
1.108 paf 918: image.Fill(
1.91 paf 919: params.as_int(0, "x must be int", r),
920: params.as_int(1, "y must be int", r),
1.108 paf 921: image.Color(params.as_int(2, "color must be int", r)));
1.13 paf 922: }
923:
1.91 paf 924: static void _rectangle(Request& r, MethodParams& params) {
1.108 paf 925: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 926:
1.108 paf 927: image.Rectangle(
1.91 paf 928: params.as_int(0, "x0 must be int", r),
929: params.as_int(1, "y0 must be int", r),
930: params.as_int(2, "x1 must be int", r),
931: params.as_int(3, "y1 must be int", r),
1.108 paf 932: image.Color(params.as_int(4, "color must be int", r)));
1.13 paf 933: }
934:
1.91 paf 935: static void _bar(Request& r, MethodParams& params) {
1.108 paf 936: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 937:
1.108 paf 938: image.FilledRectangle(
1.91 paf 939: params.as_int(0, "x0 must be int", r),
940: params.as_int(1, "y0 must be int", r),
941: params.as_int(2, "x1 must be int", r),
942: params.as_int(3, "y1 must be int", r),
1.108 paf 943: image.Color(params.as_int(4, "color must be int", r)));
1.13 paf 944: }
945:
1.44 parser 946: #ifndef DOXYGEN
1.91 paf 947: static void add_point(Table::element_type row,
948: gdImage::Point **p) {
1.110 paf 949: if(row->count()!=2)
950: throw Exception(0,
951: 0,
952: "coordinates table must contain two columns: x and y values");
1.91 paf 953: (**p).x=row->get(0)->as_int();
954: (**p).y=row->get(1)->as_int();
1.44 parser 955: (*p)++;
956: }
957: #endif
1.91 paf 958: static void _replace(Request& r, MethodParams& params) {
1.108 paf 959: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 960:
1.116 misha 961: Table* table=params.as_no_junction(2, COORDINATES_MUST_NOT_BE_CODE).get_table();
1.44 parser 962: if(!table)
1.119 misha 963: throw Exception(PARSER_RUNTIME,
1.91 paf 964: 0,
1.44 parser 965: "coordinates must be table");
1.13 paf 966:
1.92 paf 967: gdImage::Point *all_p=new(PointerFreeGC) gdImage::Point[table->count()];
1.44 parser 968: gdImage::Point *add_p=all_p;
969: table->for_each(add_point, &add_p);
1.108 paf 970: image.FilledPolygonReplaceColor(all_p, table->count(),
971: image.Color(params.as_int(0, "src color must be int", r)),
972: image.Color(params.as_int(1, "dest color must be int", r)));
1.13 paf 973: }
974:
1.91 paf 975: static void _polyline(Request& r, MethodParams& params) {
1.108 paf 976: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 977:
1.116 misha 978: Table* table=params.as_no_junction(1, COORDINATES_MUST_NOT_BE_CODE).get_table();
1.44 parser 979: if(!table)
1.119 misha 980: throw Exception(PARSER_RUNTIME,
1.91 paf 981: 0,
1.44 parser 982: "coordinates must be table");
983:
1.92 paf 984: gdImage::Point* all_p=new(PointerFreeGC) gdImage::Point[table->count()];
1.44 parser 985: gdImage::Point *add_p=all_p;
986: table->for_each(add_point, &add_p);
1.108 paf 987: image.Polygon(all_p, table->count(),
988: image.Color(params.as_int(0, "color must be int", r)),
1.44 parser 989: false/*not closed*/);
990: }
991:
1.91 paf 992: static void _polygon(Request& r, MethodParams& params) {
1.108 paf 993: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 994:
1.116 misha 995: Table* table=params.as_no_junction(1, COORDINATES_MUST_NOT_BE_CODE).get_table();
1.44 parser 996: if(!table)
1.119 misha 997: throw Exception(PARSER_RUNTIME,
1.91 paf 998: 0,
1.44 parser 999: "coordinates must be table");
1000:
1.92 paf 1001: gdImage::Point* all_p=new(PointerFreeGC) gdImage::Point[table->count()];
1.44 parser 1002: gdImage::Point *add_p=all_p;
1003: table->for_each(add_point, &add_p);
1.108 paf 1004: image.Polygon(all_p, table->count(),
1005: image.Color(params.as_int(0, "color must be int", r)));
1.13 paf 1006: }
1007:
1.91 paf 1008: static void _polybar(Request& r, MethodParams& params) {
1.108 paf 1009: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 1010:
1.116 misha 1011: Table* table=params.as_no_junction(1, COORDINATES_MUST_NOT_BE_CODE).get_table();
1.44 parser 1012: if(!table)
1.115 misha 1013: throw Exception(PARSER_RUNTIME,
1.91 paf 1014: 0,
1.44 parser 1015: "coordinates must be table");
1.13 paf 1016:
1.92 paf 1017: gdImage::Point* all_p=new(PointerFreeGC) gdImage::Point[table->count()];
1.44 parser 1018: gdImage::Point *add_p=all_p;
1019: table->for_each(add_point, &add_p);
1.108 paf 1020: image.FilledPolygon(all_p, table->count(),
1021: image.Color(params.as_int(0, "color must be int", r)));
1.12 paf 1022: }
1023:
1.16 paf 1024: // font
1025:
1.85 paf 1026: #define Y(y)(y+index*height)
1.21 paf 1027:
1.91 paf 1028: // Font class
1029:
1030: const int Font::letter_spacing=1;
1031:
1032: Font::Font(//,
1033: const String& aalphabet,
1034: gdImage* aifont, int aheight, int amonospace, int aspacebarspace):
1035: height(aheight), monospace(amonospace), spacebarspace(aspacebarspace),
1.100 paf 1036: ifont(aifont),
1037: alphabet(aalphabet) {
1.91 paf 1038: }
1039:
1040: /* ******************************** char ********************************** */
1041:
1042: size_t Font::index_of(char ch) {
1043: if(ch==' ') return STRING_NOT_FOUND;
1044: return alphabet.pos(ch);
1045: }
1046:
1047: int Font::index_width(size_t index) {
1048: if(index==STRING_NOT_FOUND)
1049: return spacebarspace;
1050: int tr=ifont->GetTransparent();
1051: for(int x=ifont->SX()-1; x>=0; x--) {
1052: for(int y=0; y<height; y++)
1053: if(ifont->GetPixel(x, Y(y))!=tr)
1054: return x+1;
1.16 paf 1055: }
1.91 paf 1056: return 0;
1057: }
1058:
1.108 paf 1059: void Font::index_display(gdImage& image, int x, int y, size_t index){
1.91 paf 1060: if(index!=STRING_NOT_FOUND)
1.108 paf 1061: ifont->Copy(image, x, y, 0, Y(0), index_width(index), height);
1.91 paf 1062: }
1063:
1064: /* ******************************** string ********************************** */
1065:
1066: int Font::step_width(int index) {
1067: return letter_spacing + (monospace ? monospace : index_width(index));
1068: }
1069:
1070: // counts trailing letter_spacing, consider this OK. useful for contiuations
1071: int Font::string_width(const String& s){
1072: const char* cstr=s.cstr();
1073: int result=0;
1074: for(const char* current=cstr; *current; current++)
1075: result+=step_width(index_of(*current));
1076: return result;
1077: }
1078:
1.108 paf 1079: void Font::string_display(gdImage& image, int x, int y, const String& s){
1.91 paf 1080: const char* cstr=s.cstr();
1081: for(const char* current=cstr; *current; current++) {
1082: size_t index=index_of(*current);
1083: index_display(image, x, y, index);
1084: x+=step_width(index);
1.87 paf 1085: }
1.91 paf 1086: }
1.87 paf 1087:
1.91 paf 1088: //
1.35 parser 1089:
1.16 paf 1090:
1.91 paf 1091: static void _font(Request& r, MethodParams& params) {
1092: const String& alphabet=params.as_string(0, "alphabet must not be code");
1.117 misha 1093: gdImage* image=load(r, params.as_string(1, FILE_NAME_MUST_NOT_BE_CODE));
1.91 paf 1094: int spacebar_width=params.as_int(2, "spacebar_width must be int", r);
1.37 parser 1095: int monospace_width;
1.91 paf 1096: if(params.count()>3) {
1097: monospace_width=params.as_int(3, "monospace_width must be int", r);
1.37 parser 1098: if(!monospace_width)
1.91 paf 1099: monospace_width=image->SX();
1.37 parser 1100: } else
1101: monospace_width=0;
1.16 paf 1102:
1.91 paf 1103: if(!alphabet.length())
1.115 misha 1104: throw Exception(PARSER_RUNTIME,
1.91 paf 1105: 0,
1.37 parser 1106: "alphabet must not be empty");
1.84 paf 1107:
1.91 paf 1108: if(int remainder=image->SY() % alphabet.length())
1.115 misha 1109: throw Exception(PARSER_RUNTIME,
1.91 paf 1110: 0,
1.84 paf 1111: "font-file height(%d) not divisable by alphabet size(%d), remainder=%d",
1.91 paf 1112: image->SY(), alphabet.length(), remainder);
1.37 parser 1113:
1.108 paf 1114: GET_SELF(r, VImage).set_font(new Font(
1.37 parser 1115: alphabet,
1.36 parser 1116: image,
1.108 paf 1117: image->SY() / alphabet.length(), monospace_width, spacebar_width));
1.16 paf 1118: }
1119:
1.91 paf 1120: static void _text(Request& r, MethodParams& params) {
1121: int x=params.as_int(0, "x must be int", r);
1122: int y=params.as_int(1, "y must be int", r);
1123: const String& s=params.as_string(2, "text must not be code");
1.16 paf 1124:
1.91 paf 1125: VImage& vimage=GET_SELF(r, VImage);
1.108 paf 1126: vimage.font().string_display(vimage.image(), x, y, s);
1.16 paf 1127: }
1128:
1.91 paf 1129: static void _length(Request& r, MethodParams& params) {
1130: const String& s=params.as_string(0, "text must not be code");
1.47 parser 1131:
1.91 paf 1132: VImage& vimage=GET_SELF(r, VImage);
1.108 paf 1133: r.write_no_lang(*new VInt(vimage.font().string_width(s)));
1.47 parser 1134: }
1135:
1.91 paf 1136: static void _arc(Request& r, MethodParams& params) {
1.108 paf 1137: gdImage& image=GET_SELF(r, VImage).image();
1.48 parser 1138:
1.108 paf 1139: image.Arc(
1.91 paf 1140: params.as_int(0, "center_x must be int", r),
1141: params.as_int(1, "center_y must be int", r),
1142: params.as_int(2, "width must be int", r),
1143: params.as_int(3, "height must be int", r),
1144: params.as_int(4, "start degrees must be int", r),
1145: params.as_int(5, "end degrees must be int", r),
1.108 paf 1146: image.Color(params.as_int(6, "cx must be int", r)));
1.48 parser 1147: }
1148:
1.91 paf 1149: static void _sector(Request& r, MethodParams& params) {
1.108 paf 1150: gdImage& image=GET_SELF(r, VImage).image();
1.49 parser 1151:
1.108 paf 1152: image.Sector(
1.91 paf 1153: params.as_int(0, "center_x must be int", r),
1154: params.as_int(1, "center_y must be int", r),
1155: params.as_int(2, "width must be int", r),
1156: params.as_int(3, "height must be int", r),
1157: params.as_int(4, "start degrees must be int", r),
1158: params.as_int(5, "end degrees must be int", r),
1.108 paf 1159: image.Color(params.as_int(6, "color must be int", r)));
1.49 parser 1160: }
1161:
1.91 paf 1162: static void _circle(Request& r, MethodParams& params) {
1.108 paf 1163: gdImage& image=GET_SELF(r, VImage).image();
1.48 parser 1164:
1.91 paf 1165: int size=params.as_int(2, "radius must be int", r)*2;
1.108 paf 1166: image.Arc(
1.91 paf 1167: params.as_int(0, "center_x must be int", r),
1168: params.as_int(1, "center_y must be int", r),
1.50 parser 1169: size, //w
1170: size, //h
1.48 parser 1171: 0, //s
1172: 360, //e
1.108 paf 1173: image.Color(params.as_int(3, "color must be int", r)));
1.48 parser 1174: }
1175:
1.108 paf 1176: gdImage& as_image(MethodParams& params, int index, const char* msg) {
1.91 paf 1177: Value& value=params.as_no_junction(index, msg);
1.53 parser 1178:
1.91 paf 1179: if(Value* vimage=value.as(VIMAGE_TYPE, false)) {
1.108 paf 1180: return static_cast<VImage *>(vimage)->image();
1.75 paf 1181: } else
1.115 misha 1182: throw Exception(PARSER_RUNTIME,
1.91 paf 1183: 0,
1.53 parser 1184: msg);
1185: }
1186:
1.91 paf 1187: static void _copy(Request& r, MethodParams& params) {
1.108 paf 1188: gdImage& dest=GET_SELF(r, VImage).image();
1.53 parser 1189:
1.108 paf 1190: gdImage& src=as_image(params, 0, "src must be image");
1.53 parser 1191:
1.91 paf 1192: int sx=params.as_int(1, "src_x must be int", r);
1193: int sy=params.as_int(2, "src_y must be int", r);
1194: int sw=params.as_int(3, "src_w must be int", r);
1195: int sh=params.as_int(4, "src_h must be int", r);
1196: int dx=params.as_int(5, "dest_x must be int", r);
1197: int dy=params.as_int(6, "dest_y must be int", r);
1198: if(params.count()>1+2+2+2) {
1199: int dw=params.as_int(1+2+2+2, "dest_w must be int", r);
1200: int dh=(int)(params.count()>1+2+2+2+1?
1201: params.as_int(1+2+2+2+1, "dest_h must be int", r):sh*(((double)dw)/((double)sw)));
1202: int tolerance=params.count()>1+2+2+2+2?
1203: params.as_int(1+2+2+2+2, "tolerance must be int", r):150;
1.53 parser 1204:
1.108 paf 1205: src.CopyResampled(dest, dx, dy, sx, sy, dw, dh, sw, sh, tolerance);
1.53 parser 1206: } else
1.108 paf 1207: src.Copy(dest, dx, dy, sx, sy, sw, sh);
1208: }
1209:
1210: static void _pixel(Request& r, MethodParams& params) {
1211: gdImage& image=GET_SELF(r, VImage).image();
1212:
1.109 paf 1213: int x=params.as_int(0, "x must be int", r);
1214: int y=params.as_int(1, "y must be int", r);
1215:
1216: if(params.count()>2) {
1217: image.SetPixel(x, y,
1218: image.Color(params.as_int(2, "color must be int", r)));
1219: } else
1220: r.write_no_lang(*new VInt(image.DecodeColor(image.GetPixel(x, y))));
1.53 parser 1221: }
1222:
1223:
1.22 paf 1224: // constructor
1225:
1.91 paf 1226: MImage::MImage(): Methoded("image") {
1.1 paf 1227: // ^image:measure[DATA]
1.22 paf 1228: add_native_method("measure", Method::CT_DYNAMIC, _measure, 1, 1);
1.3 paf 1229:
1.25 paf 1230: // ^image.html[]
1231: // ^image.html[hash]
1.22 paf 1232: add_native_method("html", Method::CT_DYNAMIC, _html, 0, 1);
1.6 paf 1233:
1.25 paf 1234: // ^image.load[background.gif]
1.22 paf 1235: add_native_method("load", Method::CT_DYNAMIC, _load, 1, 1);
1.6 paf 1236:
1.25 paf 1237: // ^image.create[width;height] bgcolor=white
1238: // ^image.create[width;height;bgcolor]
1.22 paf 1239: add_native_method("create", Method::CT_DYNAMIC, _create, 2, 3);
1.6 paf 1240:
1.25 paf 1241: // ^image.gif[]
1.95 paf 1242: add_native_method("gif", Method::CT_DYNAMIC, _gif, 0, 1);
1.12 paf 1243:
1.25 paf 1244: // ^image.line(x0;y0;x1;y1;color)
1.22 paf 1245: add_native_method("line", Method::CT_DYNAMIC, _line, 5, 5);
1.13 paf 1246:
1.25 paf 1247: // ^image.fill(x;y;color)
1.22 paf 1248: add_native_method("fill", Method::CT_DYNAMIC, _fill, 3, 3);
1.13 paf 1249:
1.25 paf 1250: // ^image.rectangle(x0;y0;x1;y1;color)
1.22 paf 1251: add_native_method("rectangle", Method::CT_DYNAMIC, _rectangle, 5, 5);
1.13 paf 1252:
1.25 paf 1253: // ^image.bar(x0;y0;x1;y1;color)
1.22 paf 1254: add_native_method("bar", Method::CT_DYNAMIC, _bar, 5, 5);
1.13 paf 1255:
1.44 parser 1256: // ^image.replace(color-source;color-dest)[table x:y]
1257: add_native_method("replace", Method::CT_DYNAMIC, _replace, 3, 3);
1258:
1259: // ^image.polyline(color)[table x:y]
1260: add_native_method("polyline", Method::CT_DYNAMIC, _polyline, 2, 2);
1.13 paf 1261:
1.44 parser 1262: // ^image.polygon(color)[table x:y]
1263: add_native_method("polygon", Method::CT_DYNAMIC, _polygon, 2, 2);
1.13 paf 1264:
1.44 parser 1265: // ^image.polybar(color)[table x:y]
1266: add_native_method("polybar", Method::CT_DYNAMIC, _polybar, 2, 2);
1.13 paf 1267:
1.36 parser 1268: // ^image.font[alPHAbet;font-file-name.gif](spacebar_width)
1269: // ^image.font[alPHAbet;font-file-name.gif](spacebar_width;width)
1270: add_native_method("font", Method::CT_DYNAMIC, _font, 3, 4);
1.16 paf 1271:
1.25 paf 1272: // ^image.text(x;y)[text]
1.22 paf 1273: add_native_method("text", Method::CT_DYNAMIC, _text, 3, 3);
1.47 parser 1274:
1275: // ^image.ngth[text]
1276: add_native_method("length", Method::CT_DYNAMIC, _length, 1, 1);
1.16 paf 1277:
1.48 parser 1278: // ^image.arc(center x;center y;width;height;start in degrees;end in degrees;color)
1279: add_native_method("arc", Method::CT_DYNAMIC, _arc, 7, 7);
1.49 parser 1280:
1281: // ^image.sector(center x;center y;width;height;start in degrees;end in degrees;color)
1282: add_native_method("sector", Method::CT_DYNAMIC, _sector, 7, 7);
1.48 parser 1283:
1284: // ^image.circle(center x;center y;r;color)
1285: add_native_method("circle", Method::CT_DYNAMIC, _circle, 4, 4);
1286:
1.56 parser 1287: // ^image.copy[source](src x;src y;src w;src h;dst x;dst y[;dest w[;dest h[;tolerance]]])
1288: add_native_method("copy", Method::CT_DYNAMIC, _copy, 1+2+2+2, (1+2+2+2)+2+1);
1.108 paf 1289:
1290: // ^image.pixel(x;y)[(color)]
1.109 paf 1291: add_native_method("pixel", Method::CT_DYNAMIC, _pixel, 2, 3);
1.1 paf 1292: }
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