Annotation of parser3/src/classes/image.C, revision 1.152
1.1 paf 1: /** @file
2: Parser: @b image parser class.
3:
1.150 moko 4: Copyright (c) 2001-2015 Art. Lebedev Studio (http://www.artlebedev.com)
1.66 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.73 paf 6: */
1.1 paf 7:
1.31 parser 8: /*
9: jpegsize: gets the width and height (in pixels) of a jpeg file
10: Andrew Tong, werdna@ugcs.caltech.edu February 14, 1995
11: modified slightly by alex@ed.ac.uk
12: and further still by rjray@uswest.com
13: optimization and general re-write from tmetro@vl.com
14: from perl by paf@design.ru
1.1 paf 15: */
16:
17: #include "pa_config_includes.h"
1.139 moko 18: #include "gif.h"
1.1 paf 19:
1.91 paf 20: #include "pa_vmethod_frame.h"
1.1 paf 21: #include "pa_common.h"
22: #include "pa_request.h"
23: #include "pa_vfile.h"
24: #include "pa_vimage.h"
1.89 paf 25: #include "pa_vdate.h"
1.91 paf 26: #include "pa_table.h"
1.1 paf 27:
1.152 ! moko 28: volatile const char * IDENT_IMAGE_C="$Id: image.C,v 1.151 2016/03/31 21:46:19 moko Exp $";
1.139 moko 29:
1.125 misha 30: // defines
31:
1.126 misha 32: static const String spacebar_width_name("space");
33: static const String monospace_width_name("width");
34: static const String letter_spacing_name("spacing");
1.125 misha 35:
1.22 paf 36: // class
37:
1.91 paf 38: class MImage: public Methoded {
1.22 paf 39: public: // VStateless_class
1.130 misha 40: Value* create_new_value(Pool&) { return new VImage(); }
1.22 paf 41:
42: public:
1.91 paf 43: MImage();
1.22 paf 44: };
1.1 paf 45:
1.91 paf 46: // globals
47:
1.151 moko 48: DECLARE_CLASS_VAR(image, new MImage);
1.91 paf 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);
1.149 moko 182:
183: // other tags
184: EXIF_TAG(0xa430, CameraOwnerName);
185: EXIF_TAG(0xa431, BodySerialNumber);
186: EXIF_TAG(0xa432, LensSpecification);
187: EXIF_TAG(0xa433, LensManufactor);
188: EXIF_TAG(0xa434, LensModel);
189: EXIF_TAG(0xa435, LensSerialNumber);
1.91 paf 190: }
191: } exif_tag_value2name;
192:
1.118 misha 193: class EXIF_gps_tag_value2name: public Hash<int, const char*> {
194: public:
195: EXIF_gps_tag_value2name() {
196: EXIF_TAG(0x0, GPSVersionID);
197: EXIF_TAG(0x1, GPSLatitudeRef);
198: EXIF_TAG(0x2, GPSLatitude);
199: EXIF_TAG(0x3, GPSLongitudeRef);
200: EXIF_TAG(0x4, GPSLongitude);
201: EXIF_TAG(0x5, GPSAltitudeRef);
202: EXIF_TAG(0x6, GPSAltitude);
203: EXIF_TAG(0x7, GPSTimeStamp);
204: EXIF_TAG(0x8, GPSSatellites);
205: EXIF_TAG(0x9, GPSStatus);
206: EXIF_TAG(0xA, GPSMeasureMode);
207: EXIF_TAG(0xB, GPSDOP);
208: EXIF_TAG(0xC, GPSSpeedRef);
209: EXIF_TAG(0xD, GPSSpeed);
210: EXIF_TAG(0xE, GPSTrackRef);
211: EXIF_TAG(0xF, GPSTrack);
212: EXIF_TAG(0x10, GPSImgDirectionRef);
213: EXIF_TAG(0x11, GPSImgDirection);
214: EXIF_TAG(0x12, GPSMapDatum);
215: EXIF_TAG(0x13, GPSDestLatitudeRef);
216: EXIF_TAG(0x14, GPSDestLatitude);
217: EXIF_TAG(0x15, GPSDestLongitudeRef);
218: EXIF_TAG(0x16, GPSDestLongitude);
219: EXIF_TAG(0x17, GPSDestBearingRef);
220: EXIF_TAG(0x18, GPSDestBearing);
221: EXIF_TAG(0x19, GPSDestDistanceRef);
222: EXIF_TAG(0x1A, GPSDestDistance);
223: EXIF_TAG(0x1B, GPSProcessingMethod);
224: EXIF_TAG(0x1C, GPSAreaInformation);
225: EXIF_TAG(0x1D, GPSDateStamp);
226: EXIF_TAG(0x1E, GPSDifferential);
227: }
228: } exif_gps_tag_value2name;
229:
230: #undef EXIF_TAG
1.91 paf 231:
1.43 parser 232: #ifndef DOXYGEN
1.1 paf 233: class Measure_reader {
234: public:
1.91 paf 235: virtual size_t read(const char* &buf, size_t limit)=0;
1.79 paf 236: virtual void seek(long value, int whence)=0;
237: virtual long tell()=0;
1.77 paf 238: };
1.1 paf 239:
1.77 paf 240: class Measure_file_reader: public Measure_reader {
1.152 ! moko 241: const String& file_name;
1.91 paf 242: int f;
243:
1.77 paf 244: public:
1.152 ! moko 245: Measure_file_reader(int af, const String& afile_name):
! 246: file_name(afile_name), f(af) {
1.1 paf 247: }
248:
1.91 paf 249: override size_t read(const char* &abuf, size_t limit) {
1.77 paf 250: if(limit==0)
1.1 paf 251: return 0;
1.77 paf 252:
1.91 paf 253: char* lbuf=new(PointerFreeGC) char[limit];
1.143 moko 254: ssize_t read_size=::read(f, lbuf, limit); abuf=lbuf;
255: if(read_size<0)
256: throw Exception(0, &file_name, "measure read failed: %s (%d)", strerror(errno), errno);
1.1 paf 257: return read_size;
258: }
259:
1.91 paf 260: override void seek(long value, int whence) {
1.79 paf 261: if(lseek(f, value, whence)<0)
1.152 ! moko 262: throw Exception(IMAGE_FORMAT, &file_name, "seek(value=%ld, whence=%d) failed: %s (%d)", value, whence, strerror(errno), errno);
1.77 paf 263: }
264:
1.91 paf 265: override long tell() { return lseek(f, 0, SEEK_CUR); }
1.79 paf 266:
1.77 paf 267: };
268:
269: class Measure_buf_reader: public Measure_reader {
1.91 paf 270:
271: const char* buf; size_t size;
272: const String& file_name;
273:
274: size_t offset;
275:
1.77 paf 276: public:
1.91 paf 277: Measure_buf_reader(const char* abuf, size_t asize, const String& afile_name):
1.77 paf 278: buf(abuf), size(asize), file_name(afile_name), offset(0) {
279: }
280:
1.91 paf 281: override size_t read(const char* &abuf, size_t limit) {
1.77 paf 282: size_t to_read=min(limit, size-offset);
1.91 paf 283: abuf=buf+offset;
1.77 paf 284: offset+=to_read;
285: return to_read;
286: }
287:
1.91 paf 288: override void seek(long value, int whence) {
1.79 paf 289: size_t new_offset;
290: switch(whence) {
291: case SEEK_CUR: new_offset=offset+value; break;
292: case SEEK_SET: new_offset=(size_t)value; break;
1.91 paf 293: default:
294: throw Exception(0,
295: 0,
296: "whence #%d not supported", 0, whence);
297: break; // never
1.79 paf 298: }
299:
1.77 paf 300: if((ssize_t)new_offset<0 || new_offset>size)
1.118 misha 301: throw Exception(IMAGE_FORMAT,
1.77 paf 302: &file_name,
1.79 paf 303: "seek(value=%l, whence=%d) failed: out of buffer, new_offset>size (%l>%l) or new_offset<0",
304: value, whence, new_offset, size);
1.77 paf 305: offset=new_offset;
306: }
307:
1.91 paf 308: override long tell() { return offset; }
1.79 paf 309:
1.1 paf 310: };
1.77 paf 311:
1.43 parser 312: #endif
1.1 paf 313:
1.72 paf 314: /// PNG file header
315: struct PNG_Header {
316: char dummy[12];
317: char signature[4]; //< must be "IHDR"
1.80 paf 318: uchar high_width[2]; //< image width high bytes [we ignore for now]
319: uchar width[2]; //< image width low bytes
320: uchar high_height[2]; //< image height high bytes [we ignore for now]
321: uchar height[4]; //< image height
1.72 paf 322: };
323:
1.21 paf 324: /// GIF file header
1.1 paf 325: struct GIF_Header {
1.72 paf 326: char signature[3]; // 'GIF'
1.1 paf 327: char version[3];
1.80 paf 328: uchar width[2];
329: uchar height[2];
1.1 paf 330: char dif;
331: char fonColor;
332: char nulls;
333: };
334:
1.31 parser 335: /// JPEG record head
336: struct JPG_Segment_head {
1.80 paf 337: uchar marker;
338: uchar code;
339: uchar length[2];
1.1 paf 340: };
1.21 paf 341: /// JPEG frame header
1.31 parser 342: struct JPG_Size_segment_body {
1.27 parser 343: char data; //< data precision of bits/sample
1.80 paf 344: uchar height[2]; //< image height
345: uchar width[2]; //< image width
1.27 parser 346: char numComponents; //< number of color components
1.1 paf 347: };
348:
1.79 paf 349: /// JPEG frame header
1.91 paf 350: struct JPG_Exif_segment_begin {
1.79 paf 351: char signature[6]; // Exif\0\0
352: };
353:
1.80 paf 354: /// JPEG Exif TIFF Header
355: struct JPG_Exif_TIFF_header {
356: uchar byte_align_identifier[2];
357: char dummy[2]; // always 000A [or 0A00]
358: uchar first_IFD_offset[4]; // Usually the first IFD starts immediately next to TIFF header, so this offset has value '0x00000008'.
359: };
360:
361: // JPEG Exif IFD start
1.91 paf 362: struct JPG_Exif_IFD_begin {
1.80 paf 363: uchar directory_entry_count[2]; // the number of directory entry contains in this IFD
364: };
365:
366: // TTTT ffff NNNNNNNN DDDDDDDD
367: struct JPG_Exif_IFD_entry {
368: uchar tag[2]; // Tag number, this shows a kind of data
369: uchar format[2]; // data format
370: uchar components_count[4]; // number of components
371: uchar value_or_offset_to_it[4]; // data value or offset to data value
372: };
373:
374: #define JPG_IFD_TAG_EXIF_OFFSET 0x8769
375:
1.118 misha 376: #define JPG_IFD_TAG_EXIF_GPS_OFFSET 0x8825
377:
1.89 paf 378: #define JPEG_EXIF_DATE_CHARS 20
379:
1.1 paf 380: //
381:
1.80 paf 382: inline ushort x_endian_to_ushort(uchar b0, uchar b1) {
383: return (ushort)((b1<<8) + b0);
1.33 parser 384: }
385:
1.80 paf 386: inline uint x_endian_to_uint(uchar b0, uchar b1, uchar b2, uchar b3) {
387: return (uint)(((((b3<<8) + b2)<<8)+b1)<<8)+b0;
1.33 parser 388: }
389:
1.80 paf 390: inline ushort endian_to_ushort(bool is_big, const uchar *b/* [2] */) {
391: return is_big?x_endian_to_ushort(b[1], b[0]):
392: x_endian_to_ushort(b[0], b[1]);
1.1 paf 393: }
394:
1.80 paf 395: inline uint endian_to_uint(bool is_big, const uchar *b /* [4] */) {
396: return is_big?x_endian_to_uint(b[3], b[2], b[1], b[0]):
397: x_endian_to_uint(b[0], b[1], b[2], b[3]);
398: }
399:
1.152 ! moko 400: static void measure_gif(const String& origin_string, 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
1.147 moko 466: tm cstr_to_time_t(char *, const char **);
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 {
1.147 moko 482: tm tmIn=cstr_to_time_t(cstr_writable, 0);
1.146 moko 483: return new VDate(tmIn);
1.106 paf 484: }
485: catch(...) { /*ignore bad date times*/ }
1.89 paf 486: }
487:
1.123 misha 488: return new VString(*new String(cstr, String::L_TAINTED));
1.80 paf 489: }
490:
491: if(components_count==1)
1.91 paf 492: return parse_IFD_entry_formatted_one_value(is_big, format, component_size, value);
1.80 paf 493:
1.91 paf 494: VHash* result=new VHash;
495: HashStringValue& hash=result->hash();
1.80 paf 496: for(uint i=0; i<components_count; i++, value+=component_size) {
1.91 paf 497: hash.put(
1.93 paf 498: String::Body::Format(i),
1.91 paf 499: parse_IFD_entry_formatted_one_value(is_big, format, component_size, value));
1.80 paf 500: }
501:
1.91 paf 502: return result;
1.80 paf 503: }
504:
1.91 paf 505: static Value* parse_IFD_entry_value(
1.80 paf 506: bool is_big, Measure_reader& reader, long tiff_base,
507: JPG_Exif_IFD_entry& entry) {
508: size_t format2component_size[]={
509: 0, // undefined
510: 1, // unsigned byte
511: 1, // ascii string
512: 2, // unsigned short
513: 4, // unsigned long
514: 8, // unsigned rational
515: 1, // signed byte
516: 0, // undefined
517: 2, // signed short
518: 4, // signed long
519: 8, // signed rational
520: /*
521: 4, // single float
522: 8, // double float
523: */
524: };
525:
526: ushort format=endian_to_ushort(is_big, entry.format);
527: if(format>=sizeof(format2component_size)/sizeof(format2component_size[0]))
528: return 0; // format out of range, ignoring
529:
530: size_t component_size=format2component_size[format];
531: if(component_size==0)
532: return 0; // undefined format
533:
534: // You can get the total data byte length by multiplies
535: // a 'bytes/components' value (see above chart) by number of components stored 'NNNNNNNN' area
536: uint components_count=endian_to_uint(is_big, entry.components_count);
1.121 misha 537: uint value_size=component_size*components_count;
1.80 paf 538: // If its size is over 4bytes, 'DDDDDDDD' contains the offset to data stored address
1.91 paf 539: Value* result;
1.80 paf 540:
541: if(value_size<=4)
1.91 paf 542: result=parse_IFD_entry_formatted_value(
1.80 paf 543: is_big, format,
544: component_size, components_count,
545: entry.value_or_offset_to_it);
546: else {
547: long remembered=reader.tell();
548: {
549: reader.seek(tiff_base+endian_to_uint(is_big, entry.value_or_offset_to_it), SEEK_SET);
1.91 paf 550: const char* value;
1.80 paf 551: if(reader.read(value, value_size)<sizeof(value_size))
552: return 0;
1.91 paf 553: result=parse_IFD_entry_formatted_value(
1.80 paf 554: is_big, format,
555: component_size, components_count,
556: (const uchar*)value);
557: }
558: reader.seek(remembered, SEEK_SET);
559: }
560:
561: return result;
562: }
563:
1.91 paf 564: static void parse_IFD(HashStringValue& hash,
1.118 misha 565: bool is_big, Measure_reader& reader, long tiff_base, bool gps=false);
1.91 paf 566:
567: static void parse_IFD_entry(HashStringValue& hash,
568: bool is_big, Measure_reader& reader, long tiff_base,
1.118 misha 569: JPG_Exif_IFD_entry& entry, bool gps=false) {
1.80 paf 570: ushort tag=endian_to_ushort(is_big, entry.tag);
1.118 misha 571:
572: if(tag==JPG_IFD_TAG_EXIF_OFFSET || tag==JPG_IFD_TAG_EXIF_GPS_OFFSET){
1.80 paf 573: long remembered=reader.tell();
574: {
575: reader.seek(tiff_base+endian_to_uint(is_big, entry.value_or_offset_to_it), SEEK_SET);
1.118 misha 576: parse_IFD(hash, is_big, reader, tiff_base, (tag==JPG_IFD_TAG_EXIF_GPS_OFFSET)?true:gps);
1.80 paf 577: }
578: reader.seek(remembered, SEEK_SET);
579: return;
580: }
1.118 misha 581:
1.91 paf 582: if(Value* value=parse_IFD_entry_value(is_big, reader, tiff_base, entry)) {
1.118 misha 583: if(const char* name=(gps)?exif_gps_tag_value2name.get(tag):exif_tag_value2name.get(tag))
1.148 moko 584: hash.put(name, value);
1.80 paf 585: else
1.93 paf 586: hash.put(String::Body::Format(tag), value);
1.80 paf 587: }
1.1 paf 588: }
589:
1.91 paf 590: static void parse_IFD(
591: HashStringValue& hash,
1.118 misha 592: bool is_big, Measure_reader& reader, long tiff_base, bool gps) {
1.91 paf 593: const char* buf;
594: if(reader.read(buf, sizeof(JPG_Exif_IFD_begin))<sizeof(JPG_Exif_IFD_begin))
1.80 paf 595: return;
1.91 paf 596: JPG_Exif_IFD_begin *start=(JPG_Exif_IFD_begin *)buf;
1.80 paf 597:
598: ushort directory_entry_count=endian_to_ushort(is_big, start->directory_entry_count);
599: for(int i=0; i<directory_entry_count; i++) {
600: if(reader.read(buf, sizeof(JPG_Exif_IFD_entry))<sizeof(JPG_Exif_IFD_entry))
601: return;
602:
1.118 misha 603: parse_IFD_entry(hash, is_big, reader, tiff_base, *(JPG_Exif_IFD_entry *)buf, gps);
1.80 paf 604: }
605: // then goes: LLLLLLLL Offset to next IFD [not going there]
606: }
607:
1.91 paf 608: static Value* parse_exif(Measure_reader& reader, const String& origin_string) {
609: const char* buf;
610: if(reader.read(buf, sizeof(JPG_Exif_segment_begin))<sizeof(JPG_Exif_segment_begin))
1.118 misha 611: throw Exception(IMAGE_FORMAT,
1.91 paf 612: &origin_string,
1.80 paf 613: "not JPEG file - can not fully read Exif segment start");
614:
1.91 paf 615: JPG_Exif_segment_begin *start=(JPG_Exif_segment_begin *)buf;
1.80 paf 616: if(memcmp(start->signature, "Exif\0\0", 4+2)!=0) //signature invalid?
617: return 0; // ignore invalid block
618:
619: uint tiff_base=reader.tell();
620: if(reader.read(buf, sizeof(JPG_Exif_TIFF_header))<sizeof(JPG_Exif_TIFF_header))
621: return 0;
622:
623: JPG_Exif_TIFF_header *head=(JPG_Exif_TIFF_header *)buf;
624: bool is_big=head->byte_align_identifier[0]=='M'; // [M]otorola vs [I]ntel
625:
626: uint first_IFD_offset=endian_to_uint(is_big, head->first_IFD_offset);
627: reader.seek(tiff_base+first_IFD_offset, SEEK_SET);
628:
1.91 paf 629: VHash* vhash=new VHash;
1.80 paf 630:
631: // IFD
1.91 paf 632: parse_IFD(vhash->hash(), is_big, reader, tiff_base);
1.80 paf 633:
1.91 paf 634: return vhash;
1.80 paf 635: }
636:
1.152 ! moko 637: static void measure_jpeg(const String& origin_string, 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:
1.152 ! moko 704: static void measure_png(const String& origin_string, Measure_reader& reader, ushort& width, ushort& height) {
1.72 paf 705:
1.91 paf 706: const char* buf;
1.102 paf 707: const size_t head_size=sizeof(PNG_Header);
708: if(reader.read(buf, head_size)<head_size)
1.152 ! moko 709: throw Exception(IMAGE_FORMAT, &origin_string, "not PNG file - too small");
1.72 paf 710: PNG_Header *head=(PNG_Header *)buf;
711:
712: if(strncmp(head->signature, "IHDR", 4)!=0)
1.152 ! moko 713: throw Exception(IMAGE_FORMAT, &origin_string, "not PNG file - wrong signature");
1.72 paf 714:
1.80 paf 715: width=endian_to_ushort(true, head->width);
716: height=endian_to_ushort(true, head->height);
1.72 paf 717: }
718:
1.1 paf 719: // measure center
720:
1.152 ! moko 721: static void measure(const String& file_name, Measure_reader& reader, ushort& width, ushort& height, Value** exif) {
1.128 misha 722: const char* file_name_cstr=file_name.taint_cstr(String::L_FILE_SPEC);
1.91 paf 723: if(const char* cext=strrchr(file_name_cstr, '.')) {
1.1 paf 724: cext++;
725: if(strcasecmp(cext, "GIF")==0)
1.91 paf 726: measure_gif(file_name, reader, width, height);
1.1 paf 727: else if(strcasecmp(cext, "JPG")==0 || strcasecmp(cext, "JPEG")==0)
1.91 paf 728: measure_jpeg(file_name, reader, width, height, exif);
1.72 paf 729: else if(strcasecmp(cext, "PNG")==0)
1.91 paf 730: measure_png(file_name, reader, width, height);
1.1 paf 731: else
1.152 ! moko 732: throw Exception(IMAGE_FORMAT, &file_name, "unhandled image file name extension '%s'", cext);
1.1 paf 733: } else
1.152 ! moko 734: throw Exception(IMAGE_FORMAT, &file_name, "can not determine image type - no file name extension");
1.1 paf 735: }
736:
1.77 paf 737: // methods
1.1 paf 738:
1.40 parser 739: #ifndef DOXYGEN
1.77 paf 740: struct File_measure_action_info {
1.91 paf 741: ushort* width;
742: ushort* height;
743: Value** exif;
1.1 paf 744: };
1.40 parser 745: #endif
1.152 ! moko 746: static void file_measure_action(struct stat& /*finfo*/, int f, const String& file_spec, void *context) {
1.77 paf 747: File_measure_action_info& info=*static_cast<File_measure_action_info *>(context);
1.1 paf 748:
1.152 ! moko 749: Measure_file_reader reader(f, file_spec);
! 750: measure(file_spec, reader, *info.width, *info.height, info.exif);
1.1 paf 751: }
752:
1.91 paf 753: static void _measure(Request& r, MethodParams& params) {
754: Value& data=params.as_no_junction(0, "data must not be code");
1.1 paf 755:
1.78 paf 756: ushort width=0;
757: ushort height=0;
1.91 paf 758: Value* exif=0;
759: const String* file_name;
1.100 paf 760: if((file_name=data.get_string())) {
761: File_measure_action_info info={
762: &width, &height,
1.152 ! moko 763: &exif
1.100 paf 764: };
1.152 ! moko 765: file_read_action_under_lock(r.absolute(*file_name), "measure", file_measure_action, &info);
1.1 paf 766: } else {
1.129 misha 767: VFile* vfile=data.as_vfile(String::L_AS_IS);
1.91 paf 768: file_name=&vfile->fields().get(name_name)->as_string();
1.77 paf 769: Measure_buf_reader reader(
1.91 paf 770: vfile->value_ptr(),
771: vfile->value_size(),
1.77 paf 772: *file_name
773: );
1.91 paf 774: measure(*file_name, reader, width, height, &exif);
1.1 paf 775: }
776:
1.91 paf 777: GET_SELF(r, VImage).set(file_name, width, height, 0, exif);
1.1 paf 778: }
779:
1.40 parser 780: #ifndef DOXYGEN
1.4 paf 781: struct Attrib_info {
1.91 paf 782: String* tag; ///< html tag being constructed
783: HashStringValue* skip; ///< tag attributes not to append to tag string [to skip]
1.4 paf 784: };
1.40 parser 785: #endif
1.91 paf 786: static void append_attrib_pair(
1.133 misha 787: HashStringValue::key_type key,
788: HashStringValue::value_type value,
789: Attrib_info* info) {
790: // skip user-specified, internal(starting with "line-") attributes and border attribute with empty value
791: if(
792: (info->skip && info->skip->get(key))
793: || key.pos("line-")==0
794: || (key=="border" && !value->is_defined())
795: )
1.4 paf 796: return;
797:
1.133 misha 798: // src="a.gif" width="123" ismap[=-1]
1.91 paf 799: *info->tag << " " << key;
800: if(value->is_string() || value->as_int()>=0)
801: *info->tag << "=\"" << value->as_string() << "\"";
1.3 paf 802: }
1.91 paf 803: static void _html(Request& r, MethodParams& params) {
1.3 paf 804:
1.91 paf 805: String tag;
1.3 paf 806: tag << "<img";
1.4 paf 807:
1.91 paf 808: const HashStringValue& fields=GET_SELF(r, VImage).fields();
809: HashStringValue* attribs=0;
1.4 paf 810:
1.91 paf 811: if(params.count()) {
1.69 paf 812: // for backward compatibility: someday was ^html{}
1.133 misha 813: Value& vattribs=r.process_to_value(params[0], false/*don't intercept string*/);
1.145 moko 814: if(!vattribs.is_string()) { // allow empty
1.100 paf 815: if((attribs=vattribs.get_hash())) {
816: Attrib_info info={&tag, 0};
1.114 paf 817: attribs->for_each<Attrib_info*>(append_attrib_pair, &info);
1.39 parser 818: } else
1.115 misha 819: throw Exception(PARSER_RUNTIME,
1.91 paf 820: 0,
1.39 parser 821: "attributes must be hash");
1.145 moko 822: }
1.39 parser 823: }
1.4 paf 824:
1.91 paf 825: {
826: Attrib_info info={&tag, attribs};
1.114 paf 827: fields.for_each<Attrib_info*>(append_attrib_pair, &info);
1.91 paf 828: }
1.6 paf 829: tag << " />";
1.3 paf 830: r.write_pass_lang(tag);
831: }
1.8 paf 832:
1.68 paf 833: /// @test wrap FILE to auto-object
1.91 paf 834: static gdImage* load(Request& r,
1.16 paf 835: const String& file_name){
1.128 misha 836: const char* file_name_cstr=r.absolute(file_name).taint_cstr(String::L_FILE_SPEC);
1.16 paf 837: if(FILE *f=fopen(file_name_cstr, "rb")) {
1.91 paf 838: gdImage* image=new gdImage;
839: bool ok=image->CreateFromGif(f);
1.16 paf 840: fclose(f);
1.23 paf 841: if(!ok)
1.118 misha 842: throw Exception(IMAGE_FORMAT,
1.23 paf 843: &file_name,
844: "is not in GIF format");
1.91 paf 845: return image;
1.16 paf 846: } else {
1.68 paf 847: throw Exception("file.missing",
1.91 paf 848: 0,
1.16 paf 849: "can not open '%s'", file_name_cstr);
850: }
851: }
852:
853:
1.91 paf 854: static void _load(Request& r, MethodParams& params) {
1.116 misha 855: const String& file_name=params.as_string(0, FILE_NAME_MUST_NOT_BE_CODE);
1.6 paf 856:
1.91 paf 857: gdImage* image=load(r, file_name);
858: GET_SELF(r, VImage).set(&file_name, image->SX(), image->SY(), image);
1.6 paf 859: }
860:
1.91 paf 861: static void _create(Request& r, MethodParams& params) {
862: int width=params.as_int(0, "width must be int", r);
863: int height=params.as_int(1, "height must be int", r);
1.8 paf 864: int bgcolor_value=0xffFFff;
1.91 paf 865: if(params.count()>2)
866: bgcolor_value=params.as_int(2, "color must be int", r);
867: gdImage* image=new gdImage;
868: image->Create(width, height);
869: image->FilledRectangle(0, 0, width-1, height-1, image->Color(bgcolor_value));
870: GET_SELF(r, VImage).set(0, width, height, image);
1.6 paf 871: }
872:
1.91 paf 873: static void _gif(Request& r, MethodParams& params) {
1.108 paf 874: gdImage& image=GET_SELF(r, VImage).image();
1.6 paf 875:
1.138 misha 876: const String *file_name=params.count()>0?¶ms.as_string(0, FILE_NAME_MUST_BE_STRING):0;
1.10 paf 877:
1.108 paf 878: gdBuf buf=image.Gif();
1.6 paf 879:
1.91 paf 880: VFile& vfile=*new VFile;
1.137 misha 881:
1.142 moko 882: vfile.set_binary(false/*not tainted*/, (const char *)buf.ptr, buf.size, file_name, new VString(*new String("image/gif")));
1.137 misha 883:
1.6 paf 884: r.write_no_lang(vfile);
885: }
886:
1.91 paf 887: static void _line(Request& r, MethodParams& params) {
1.108 paf 888: gdImage& image=GET_SELF(r, VImage).image();
1.12 paf 889:
1.108 paf 890: image.Line(
1.91 paf 891: params.as_int(0, "x0 must be int", r),
892: params.as_int(1, "y0 must be int", r),
893: params.as_int(2, "x1 must be int", r),
894: params.as_int(3, "y1 must be int", r),
1.108 paf 895: image.Color(params.as_int(4, "color must be int", r)));
1.13 paf 896: }
897:
1.91 paf 898: static void _fill(Request& r, MethodParams& params) {
1.108 paf 899: gdImage& image=GET_SELF(r, VImage).image();
1.12 paf 900:
1.108 paf 901: image.Fill(
1.91 paf 902: params.as_int(0, "x must be int", r),
903: params.as_int(1, "y must be int", r),
1.108 paf 904: image.Color(params.as_int(2, "color must be int", r)));
1.13 paf 905: }
906:
1.91 paf 907: static void _rectangle(Request& r, MethodParams& params) {
1.108 paf 908: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 909:
1.108 paf 910: image.Rectangle(
1.91 paf 911: params.as_int(0, "x0 must be int", r),
912: params.as_int(1, "y0 must be int", r),
913: params.as_int(2, "x1 must be int", r),
914: params.as_int(3, "y1 must be int", r),
1.108 paf 915: image.Color(params.as_int(4, "color must be int", r)));
1.13 paf 916: }
917:
1.91 paf 918: static void _bar(Request& r, MethodParams& params) {
1.108 paf 919: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 920:
1.108 paf 921: image.FilledRectangle(
1.91 paf 922: params.as_int(0, "x0 must be int", r),
923: params.as_int(1, "y0 must be int", r),
924: params.as_int(2, "x1 must be int", r),
925: params.as_int(3, "y1 must be int", r),
1.108 paf 926: image.Color(params.as_int(4, "color must be int", r)));
1.13 paf 927: }
928:
1.44 parser 929: #ifndef DOXYGEN
1.91 paf 930: static void add_point(Table::element_type row,
931: gdImage::Point **p) {
1.110 paf 932: if(row->count()!=2)
933: throw Exception(0,
934: 0,
935: "coordinates table must contain two columns: x and y values");
1.91 paf 936: (**p).x=row->get(0)->as_int();
937: (**p).y=row->get(1)->as_int();
1.44 parser 938: (*p)++;
939: }
940: #endif
1.135 misha 941: #ifndef DOXYGEN
942: static void add_point(int x, int y,
943: gdImage::Point **p) {
944: (**p).x=x;
945: (**p).y=y;
946: (*p)++;
947: }
948: #endif
1.91 paf 949: static void _replace(Request& r, MethodParams& params) {
1.135 misha 950: int src_color=params.as_int(0, "src color must be int", r);
951: int dest_color=params.as_int(1, "dest color must be int", r);
952:
1.108 paf 953: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 954:
1.135 misha 955: gdImage::Point* all_p=0;
956: size_t count=0;
957: if(params.count() == 3){
1.140 misha 958: Table* table=params.as_table(2, "coordinates");
1.135 misha 959: count=table->count();
960: all_p=new(PointerFreeGC) gdImage::Point[count];
961: gdImage::Point* add_p=all_p;
962: table->for_each(add_point, &add_p);
963: } else {
964: int max_x=image.SX()-1;
965: int max_y=image.SY()-1;
966: if(max_x > 0 && max_y > 0){
967: count=4;
968: all_p=new(PointerFreeGC) gdImage::Point[count];
969: gdImage::Point* add_p=all_p;
970: add_point(0, 0, &add_p);
971: add_point(max_x, 0, &add_p);
972: add_point(max_x, max_y, &add_p);
973: add_point(0, max_y, &add_p);
974: }
975: }
1.13 paf 976:
1.135 misha 977: if(count)
978: image.FilledPolygonReplaceColor(all_p, count, image.Color(src_color), image.Color(dest_color));
1.13 paf 979: }
980:
1.91 paf 981: static void _polyline(Request& r, MethodParams& params) {
1.108 paf 982: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 983:
1.140 misha 984: Table* table=params.as_table(1, "coordinates");
1.44 parser 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:
1.140 misha 997: Table* table=(Table*)params.as_table(1, "coordinates");
1.44 parser 998:
1.92 paf 999: gdImage::Point* all_p=new(PointerFreeGC) gdImage::Point[table->count()];
1.44 parser 1000: gdImage::Point *add_p=all_p;
1001: table->for_each(add_point, &add_p);
1.108 paf 1002: image.Polygon(all_p, table->count(),
1003: image.Color(params.as_int(0, "color must be int", r)));
1.13 paf 1004: }
1005:
1.91 paf 1006: static void _polybar(Request& r, MethodParams& params) {
1.108 paf 1007: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 1008:
1.140 misha 1009: Table* table=(Table*)params.as_table(1, "coordinates");
1.13 paf 1010:
1.92 paf 1011: gdImage::Point* all_p=new(PointerFreeGC) gdImage::Point[table->count()];
1.44 parser 1012: gdImage::Point *add_p=all_p;
1013: table->for_each(add_point, &add_p);
1.108 paf 1014: image.FilledPolygon(all_p, table->count(),
1015: image.Color(params.as_int(0, "color must be int", r)));
1.12 paf 1016: }
1017:
1.16 paf 1018: // font
1019:
1.85 paf 1020: #define Y(y)(y+index*height)
1.21 paf 1021:
1.91 paf 1022: // Font class
1023:
1.132 misha 1024: Font::Font(
1025: Charset& asource_charset,
1.91 paf 1026: const String& aalphabet,
1.125 misha 1027: gdImage* aifont, int aheight, int amonospace, int aspacebarspace, int aletterspacing):
1.132 misha 1028: fsource_charset(asource_charset),
1029: height(aheight),
1030: monospace(amonospace),
1031: spacebarspace(aspacebarspace),
1.125 misha 1032: letterspacing(aletterspacing),
1.100 paf 1033: ifont(aifont),
1034: alphabet(aalphabet) {
1.132 misha 1035:
1036: if(fsource_charset.isUTF8()){
1037: size_t index=0;
1038: for(UTF8_string_iterator i(alphabet); i.has_next(); )
1039: fletter2index.put_dont_replace(i.next(), index++);
1040: }
1.91 paf 1041: }
1042:
1043: /* ******************************** char ********************************** */
1044:
1045: size_t Font::index_of(char ch) {
1046: if(ch==' ') return STRING_NOT_FOUND;
1047: return alphabet.pos(ch);
1048: }
1049:
1.132 misha 1050: size_t Font::index_of(XMLCh ch) {
1051: if(ch==' ') return STRING_NOT_FOUND;
1052: return fletter2index.get(ch);
1053: }
1054:
1.91 paf 1055: int Font::index_width(size_t index) {
1056: if(index==STRING_NOT_FOUND)
1057: return spacebarspace;
1058: int tr=ifont->GetTransparent();
1059: for(int x=ifont->SX()-1; x>=0; x--) {
1060: for(int y=0; y<height; y++)
1061: if(ifont->GetPixel(x, Y(y))!=tr)
1062: return x+1;
1.16 paf 1063: }
1.91 paf 1064: return 0;
1065: }
1066:
1.108 paf 1067: void Font::index_display(gdImage& image, int x, int y, size_t index){
1.91 paf 1068: if(index!=STRING_NOT_FOUND)
1.108 paf 1069: ifont->Copy(image, x, y, 0, Y(0), index_width(index), height);
1.91 paf 1070: }
1071:
1072: /* ******************************** string ********************************** */
1073:
1074: int Font::step_width(int index) {
1.125 misha 1075: return letterspacing + (monospace ? monospace : index_width(index));
1.91 paf 1076: }
1077:
1078: // counts trailing letter_spacing, consider this OK. useful for contiuations
1079: int Font::string_width(const String& s){
1080: const char* cstr=s.cstr();
1081: int result=0;
1.132 misha 1082:
1083: if(fsource_charset.isUTF8()){
1084: for(UTF8_string_iterator i(s); i.has_next(); )
1085: result+=step_width(index_of(i.next()));
1086: } else {
1087: for(const char* current=cstr; *current; current++)
1088: result+=step_width(index_of(*current));
1089: }
1090:
1.91 paf 1091: return result;
1092: }
1093:
1.108 paf 1094: void Font::string_display(gdImage& image, int x, int y, const String& s){
1.91 paf 1095: const char* cstr=s.cstr();
1.132 misha 1096:
1097: if(fsource_charset.isUTF8()){
1098: for(UTF8_string_iterator i(s); i.has_next(); ){
1099: size_t index=index_of(i.next());
1100: index_display(image, x, y, index);
1101: x+=step_width(index);
1102: }
1103: } else {
1104: for(const char* current=cstr; *current; current++) {
1105: size_t index=index_of(*current);
1106: index_display(image, x, y, index);
1107: x+=step_width(index);
1108: }
1.87 paf 1109: }
1.91 paf 1110: }
1.87 paf 1111:
1.91 paf 1112: //
1.35 parser 1113:
1.16 paf 1114:
1.91 paf 1115: static void _font(Request& r, MethodParams& params) {
1116: const String& alphabet=params.as_string(0, "alphabet must not be code");
1.131 misha 1117: size_t alphabet_length=alphabet.length(r.charsets.source());
1118: if(!alphabet_length)
1.115 misha 1119: throw Exception(PARSER_RUNTIME,
1.91 paf 1120: 0,
1.37 parser 1121: "alphabet must not be empty");
1.84 paf 1122:
1.125 misha 1123: gdImage* image=load(r, params.as_string(1, FILE_NAME_MUST_NOT_BE_CODE));
1124:
1.126 misha 1125: int spacebar_width=image->SX();
1.125 misha 1126: int monospace_width=0; // proportional
1127: int letter_spacing=1;
1128: if(params.count()>2){
1.144 moko 1129: if(HashStringValue* options=params[2].get_hash()){
1.125 misha 1130: // third option is hash
1131: if(params.count()>3)
1.144 moko 1132: throw Exception(PARSER_RUNTIME, 0, "too many params were specified");
1.125 misha 1133: int valid_options=0;
1134: if(Value* vspacebar_width=options->get(spacebar_width_name)){
1135: valid_options++;
1136: spacebar_width=r.process_to_value(*vspacebar_width).as_int();
1137: }
1138: if(Value* vmonospace_width=options->get(monospace_width_name)){
1139: valid_options++;
1140: monospace_width=r.process_to_value(*vmonospace_width).as_int();
1141: if(!monospace_width)
1142: monospace_width=image->SX();
1143: }
1144: if(Value* vletter_spacing=options->get(letter_spacing_name)){
1145: valid_options++;
1146: letter_spacing=r.process_to_value(*vletter_spacing).as_int();
1147: }
1148: if(valid_options!=options->count())
1.134 misha 1149: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.125 misha 1150: } else {
1151: // backward
1.144 moko 1152: spacebar_width=params.as_int(2, "param must be int or hash", r);
1.125 misha 1153: if(params.count()>3) {
1154: monospace_width=params.as_int(3, "monospace_width must be int", r);
1155: if(!monospace_width)
1156: monospace_width=image->SX();
1157: }
1158: }
1159: }
1160:
1.131 misha 1161: if(int remainder=image->SY() % alphabet_length)
1.115 misha 1162: throw Exception(PARSER_RUNTIME,
1.91 paf 1163: 0,
1.84 paf 1164: "font-file height(%d) not divisable by alphabet size(%d), remainder=%d",
1.131 misha 1165: image->SY(), alphabet_length, remainder);
1.37 parser 1166:
1.108 paf 1167: GET_SELF(r, VImage).set_font(new Font(
1.132 misha 1168: r.charsets.source(),
1.37 parser 1169: alphabet,
1.36 parser 1170: image,
1.131 misha 1171: image->SY() / alphabet_length, monospace_width, spacebar_width, letter_spacing));
1.16 paf 1172: }
1173:
1.91 paf 1174: static void _text(Request& r, MethodParams& params) {
1175: int x=params.as_int(0, "x must be int", r);
1176: int y=params.as_int(1, "y must be int", r);
1177: const String& s=params.as_string(2, "text must not be code");
1.16 paf 1178:
1.91 paf 1179: VImage& vimage=GET_SELF(r, VImage);
1.108 paf 1180: vimage.font().string_display(vimage.image(), x, y, s);
1.16 paf 1181: }
1182:
1.91 paf 1183: static void _length(Request& r, MethodParams& params) {
1184: const String& s=params.as_string(0, "text must not be code");
1.47 parser 1185:
1.91 paf 1186: VImage& vimage=GET_SELF(r, VImage);
1.108 paf 1187: r.write_no_lang(*new VInt(vimage.font().string_width(s)));
1.47 parser 1188: }
1189:
1.91 paf 1190: static void _arc(Request& r, MethodParams& params) {
1.108 paf 1191: gdImage& image=GET_SELF(r, VImage).image();
1.48 parser 1192:
1.108 paf 1193: image.Arc(
1.91 paf 1194: params.as_int(0, "center_x must be int", r),
1195: params.as_int(1, "center_y must be int", r),
1196: params.as_int(2, "width must be int", r),
1197: params.as_int(3, "height must be int", r),
1198: params.as_int(4, "start degrees must be int", r),
1199: params.as_int(5, "end degrees must be int", r),
1.108 paf 1200: image.Color(params.as_int(6, "cx must be int", r)));
1.48 parser 1201: }
1202:
1.91 paf 1203: static void _sector(Request& r, MethodParams& params) {
1.108 paf 1204: gdImage& image=GET_SELF(r, VImage).image();
1.49 parser 1205:
1.108 paf 1206: image.Sector(
1.91 paf 1207: params.as_int(0, "center_x must be int", r),
1208: params.as_int(1, "center_y must be int", r),
1209: params.as_int(2, "width must be int", r),
1210: params.as_int(3, "height must be int", r),
1211: params.as_int(4, "start degrees must be int", r),
1212: params.as_int(5, "end degrees must be int", r),
1.108 paf 1213: image.Color(params.as_int(6, "color must be int", r)));
1.49 parser 1214: }
1215:
1.91 paf 1216: static void _circle(Request& r, MethodParams& params) {
1.108 paf 1217: gdImage& image=GET_SELF(r, VImage).image();
1.48 parser 1218:
1.91 paf 1219: int size=params.as_int(2, "radius must be int", r)*2;
1.108 paf 1220: image.Arc(
1.91 paf 1221: params.as_int(0, "center_x must be int", r),
1222: params.as_int(1, "center_y must be int", r),
1.50 parser 1223: size, //w
1224: size, //h
1.48 parser 1225: 0, //s
1226: 360, //e
1.108 paf 1227: image.Color(params.as_int(3, "color must be int", r)));
1.48 parser 1228: }
1229:
1.108 paf 1230: gdImage& as_image(MethodParams& params, int index, const char* msg) {
1.91 paf 1231: Value& value=params.as_no_junction(index, msg);
1.53 parser 1232:
1.130 misha 1233: if(Value* vimage=value.as(VIMAGE_TYPE)) {
1.108 paf 1234: return static_cast<VImage *>(vimage)->image();
1.75 paf 1235: } else
1.115 misha 1236: throw Exception(PARSER_RUNTIME,
1.91 paf 1237: 0,
1.53 parser 1238: msg);
1239: }
1240:
1.91 paf 1241: static void _copy(Request& r, MethodParams& params) {
1.108 paf 1242: gdImage& dest=GET_SELF(r, VImage).image();
1.53 parser 1243:
1.108 paf 1244: gdImage& src=as_image(params, 0, "src must be image");
1.53 parser 1245:
1.91 paf 1246: int sx=params.as_int(1, "src_x must be int", r);
1247: int sy=params.as_int(2, "src_y must be int", r);
1248: int sw=params.as_int(3, "src_w must be int", r);
1249: int sh=params.as_int(4, "src_h must be int", r);
1250: int dx=params.as_int(5, "dest_x must be int", r);
1251: int dy=params.as_int(6, "dest_y must be int", r);
1252: if(params.count()>1+2+2+2) {
1253: int dw=params.as_int(1+2+2+2, "dest_w must be int", r);
1254: int dh=(int)(params.count()>1+2+2+2+1?
1255: params.as_int(1+2+2+2+1, "dest_h must be int", r):sh*(((double)dw)/((double)sw)));
1256: int tolerance=params.count()>1+2+2+2+2?
1257: params.as_int(1+2+2+2+2, "tolerance must be int", r):150;
1.53 parser 1258:
1.108 paf 1259: src.CopyResampled(dest, dx, dy, sx, sy, dw, dh, sw, sh, tolerance);
1.53 parser 1260: } else
1.108 paf 1261: src.Copy(dest, dx, dy, sx, sy, sw, sh);
1262: }
1263:
1264: static void _pixel(Request& r, MethodParams& params) {
1265: gdImage& image=GET_SELF(r, VImage).image();
1266:
1.109 paf 1267: int x=params.as_int(0, "x must be int", r);
1268: int y=params.as_int(1, "y must be int", r);
1269:
1270: if(params.count()>2) {
1271: image.SetPixel(x, y,
1272: image.Color(params.as_int(2, "color must be int", r)));
1273: } else
1274: r.write_no_lang(*new VInt(image.DecodeColor(image.GetPixel(x, y))));
1.53 parser 1275: }
1276:
1277:
1.22 paf 1278: // constructor
1279:
1.91 paf 1280: MImage::MImage(): Methoded("image") {
1.1 paf 1281: // ^image:measure[DATA]
1.22 paf 1282: add_native_method("measure", Method::CT_DYNAMIC, _measure, 1, 1);
1.3 paf 1283:
1.25 paf 1284: // ^image.html[]
1285: // ^image.html[hash]
1.22 paf 1286: add_native_method("html", Method::CT_DYNAMIC, _html, 0, 1);
1.6 paf 1287:
1.25 paf 1288: // ^image.load[background.gif]
1.22 paf 1289: add_native_method("load", Method::CT_DYNAMIC, _load, 1, 1);
1.6 paf 1290:
1.25 paf 1291: // ^image.create[width;height] bgcolor=white
1292: // ^image.create[width;height;bgcolor]
1.22 paf 1293: add_native_method("create", Method::CT_DYNAMIC, _create, 2, 3);
1.6 paf 1294:
1.25 paf 1295: // ^image.gif[]
1.95 paf 1296: add_native_method("gif", Method::CT_DYNAMIC, _gif, 0, 1);
1.12 paf 1297:
1.25 paf 1298: // ^image.line(x0;y0;x1;y1;color)
1.22 paf 1299: add_native_method("line", Method::CT_DYNAMIC, _line, 5, 5);
1.13 paf 1300:
1.25 paf 1301: // ^image.fill(x;y;color)
1.22 paf 1302: add_native_method("fill", Method::CT_DYNAMIC, _fill, 3, 3);
1.13 paf 1303:
1.25 paf 1304: // ^image.rectangle(x0;y0;x1;y1;color)
1.22 paf 1305: add_native_method("rectangle", Method::CT_DYNAMIC, _rectangle, 5, 5);
1.13 paf 1306:
1.25 paf 1307: // ^image.bar(x0;y0;x1;y1;color)
1.22 paf 1308: add_native_method("bar", Method::CT_DYNAMIC, _bar, 5, 5);
1.13 paf 1309:
1.44 parser 1310: // ^image.replace(color-source;color-dest)[table x:y]
1.135 misha 1311: // ^image.replace(color-source;color-dest)
1312: add_native_method("replace", Method::CT_DYNAMIC, _replace, 2, 3);
1.44 parser 1313:
1314: // ^image.polyline(color)[table x:y]
1315: add_native_method("polyline", Method::CT_DYNAMIC, _polyline, 2, 2);
1.13 paf 1316:
1.44 parser 1317: // ^image.polygon(color)[table x:y]
1318: add_native_method("polygon", Method::CT_DYNAMIC, _polygon, 2, 2);
1.13 paf 1319:
1.44 parser 1320: // ^image.polybar(color)[table x:y]
1321: add_native_method("polybar", Method::CT_DYNAMIC, _polybar, 2, 2);
1.13 paf 1322:
1.125 misha 1323: // ^image.font[alPHAbet;font-file-name.gif]
1324: // ^image.font[alPHAbet;font-file-name.gif](spacebar_width)
1325: // ^image.font[alPHAbet;font-file-name.gif](spacebar_width;letter_width)
1326: // ^image.font[alPHAbet;font-file-name.gif][$.space-width(.) $.letter-width(.) $.letter-space(.)]
1327: add_native_method("font", Method::CT_DYNAMIC, _font, 2, 4);
1.16 paf 1328:
1.125 misha 1329: // ^image.text(x;y)[text]
1.22 paf 1330: add_native_method("text", Method::CT_DYNAMIC, _text, 3, 3);
1.47 parser 1331:
1.125 misha 1332: // ^image.length[text]
1.47 parser 1333: add_native_method("length", Method::CT_DYNAMIC, _length, 1, 1);
1.16 paf 1334:
1.48 parser 1335: // ^image.arc(center x;center y;width;height;start in degrees;end in degrees;color)
1336: add_native_method("arc", Method::CT_DYNAMIC, _arc, 7, 7);
1.49 parser 1337:
1338: // ^image.sector(center x;center y;width;height;start in degrees;end in degrees;color)
1339: add_native_method("sector", Method::CT_DYNAMIC, _sector, 7, 7);
1.48 parser 1340:
1341: // ^image.circle(center x;center y;r;color)
1342: add_native_method("circle", Method::CT_DYNAMIC, _circle, 4, 4);
1343:
1.56 parser 1344: // ^image.copy[source](src x;src y;src w;src h;dst x;dst y[;dest w[;dest h[;tolerance]]])
1345: add_native_method("copy", Method::CT_DYNAMIC, _copy, 1+2+2+2, (1+2+2+2)+2+1);
1.108 paf 1346:
1347: // ^image.pixel(x;y)[(color)]
1.109 paf 1348: add_native_method("pixel", Method::CT_DYNAMIC, _pixel, 2, 3);
1.1 paf 1349: }
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