Annotation of parser3/src/classes/image.C, revision 1.162
1.1 paf 1: /** @file
2: Parser: @b image parser class.
3:
1.160 moko 4: Copyright (c) 2001-2017 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:
1.162 ! moko 28: volatile const char * IDENT_IMAGE_C="$Id: image.C,v 1.161 2017/05/11 21:09:42 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:
1.155 moko 294: throw Exception(0, 0, "whence #%d not supported", 0, whence);
1.91 paf 295: break; // never
1.79 paf 296: }
297:
1.77 paf 298: if((ssize_t)new_offset<0 || new_offset>size)
1.155 moko 299: throw Exception(IMAGE_FORMAT, &file_name, "seek(value=%l, whence=%d) failed: out of buffer, new_offset>size (%l>%l) or new_offset<0",
1.79 paf 300: value, whence, new_offset, size);
1.77 paf 301: offset=new_offset;
302: }
303:
1.91 paf 304: override long tell() { return offset; }
1.79 paf 305:
1.1 paf 306: };
1.77 paf 307:
1.43 parser 308: #endif
1.1 paf 309:
1.72 paf 310: /// PNG file header
311: struct PNG_Header {
312: char dummy[12];
313: char signature[4]; //< must be "IHDR"
1.80 paf 314: uchar high_width[2]; //< image width high bytes [we ignore for now]
315: uchar width[2]; //< image width low bytes
316: uchar high_height[2]; //< image height high bytes [we ignore for now]
317: uchar height[4]; //< image height
1.72 paf 318: };
319:
1.21 paf 320: /// GIF file header
1.1 paf 321: struct GIF_Header {
1.72 paf 322: char signature[3]; // 'GIF'
1.1 paf 323: char version[3];
1.80 paf 324: uchar width[2];
325: uchar height[2];
1.1 paf 326: char dif;
327: char fonColor;
328: char nulls;
329: };
330:
1.31 parser 331: /// JPEG record head
332: struct JPG_Segment_head {
1.80 paf 333: uchar marker;
334: uchar code;
335: uchar length[2];
1.1 paf 336: };
1.21 paf 337: /// JPEG frame header
1.31 parser 338: struct JPG_Size_segment_body {
1.27 parser 339: char data; //< data precision of bits/sample
1.80 paf 340: uchar height[2]; //< image height
341: uchar width[2]; //< image width
1.27 parser 342: char numComponents; //< number of color components
1.1 paf 343: };
344:
1.80 paf 345: /// JPEG Exif TIFF Header
346: struct JPG_Exif_TIFF_header {
347: uchar byte_align_identifier[2];
348: char dummy[2]; // always 000A [or 0A00]
349: uchar first_IFD_offset[4]; // Usually the first IFD starts immediately next to TIFF header, so this offset has value '0x00000008'.
350: };
351:
352: // JPEG Exif IFD start
1.91 paf 353: struct JPG_Exif_IFD_begin {
1.80 paf 354: uchar directory_entry_count[2]; // the number of directory entry contains in this IFD
355: };
356:
357: // TTTT ffff NNNNNNNN DDDDDDDD
358: struct JPG_Exif_IFD_entry {
359: uchar tag[2]; // Tag number, this shows a kind of data
360: uchar format[2]; // data format
361: uchar components_count[4]; // number of components
362: uchar value_or_offset_to_it[4]; // data value or offset to data value
363: };
364:
365: #define JPG_IFD_TAG_EXIF_OFFSET 0x8769
366:
1.118 misha 367: #define JPG_IFD_TAG_EXIF_GPS_OFFSET 0x8825
368:
1.89 paf 369: #define JPEG_EXIF_DATE_CHARS 20
370:
1.162 ! moko 371:
! 372: #ifndef DOXYGEN
! 373: struct Measure_info {
! 374: ushort width;
! 375: ushort height;
! 376: Value** exif;
! 377: Value** xmp;
! 378: };
! 379: #endif
! 380:
1.1 paf 381: //
382:
1.80 paf 383: inline ushort x_endian_to_ushort(uchar b0, uchar b1) {
384: return (ushort)((b1<<8) + b0);
1.33 parser 385: }
386:
1.80 paf 387: inline uint x_endian_to_uint(uchar b0, uchar b1, uchar b2, uchar b3) {
388: return (uint)(((((b3<<8) + b2)<<8)+b1)<<8)+b0;
1.33 parser 389: }
390:
1.80 paf 391: inline ushort endian_to_ushort(bool is_big, const uchar *b/* [2] */) {
392: return is_big?x_endian_to_ushort(b[1], b[0]):
393: x_endian_to_ushort(b[0], b[1]);
1.1 paf 394: }
395:
1.80 paf 396: inline uint endian_to_uint(bool is_big, const uchar *b /* [4] */) {
397: return is_big?x_endian_to_uint(b[3], b[2], b[1], b[0]):
398: x_endian_to_uint(b[0], b[1], b[2], b[3]);
399: }
400:
1.152 moko 401: static void measure_gif(const String& origin_string, Measure_reader& reader, ushort& width, ushort& height) {
1.1 paf 402:
1.91 paf 403: const char* buf;
1.102 paf 404: const size_t head_size=sizeof(GIF_Header);
405: if(reader.read(buf, head_size)<head_size)
1.155 moko 406: throw Exception(IMAGE_FORMAT, &origin_string, "not GIF file - too small");
1.31 parser 407: GIF_Header *head=(GIF_Header *)buf;
1.1 paf 408:
1.72 paf 409: if(strncmp(head->signature, "GIF", 3)!=0)
1.155 moko 410: throw Exception(IMAGE_FORMAT, &origin_string, "not GIF file - wrong signature");
1.1 paf 411:
1.80 paf 412: width=endian_to_ushort(false, head->width);
413: height=endian_to_ushort(false, head->height);
414: }
415:
1.155 moko 416: static Value* parse_IFD_entry_formatted_one_value(bool is_big, ushort format, size_t component_size, const uchar *value) {
1.80 paf 417: switch(format) {
418: case 1: // unsigned byte
1.91 paf 419: return new VInt((uchar)value[0]);
1.80 paf 420: case 3: // unsigned short
1.91 paf 421: return new VInt(endian_to_ushort(is_big, value));
1.80 paf 422: case 4: // unsigned long
423: // 'double' because parser's Int is signed
1.91 paf 424: return new VDouble(endian_to_uint(is_big, value));
1.80 paf 425: case 5: // unsigned rational
426: {
427: uint numerator=endian_to_uint(is_big, value); value+=component_size/2;
428: uint denominator=endian_to_uint(is_big, value);
429: if(!denominator)
430: return 0;
1.91 paf 431: return new VDouble(((double)numerator)/denominator);
1.80 paf 432: }
433: case 6: // signed byte
1.91 paf 434: return new VInt((signed char)value[0]);
1.80 paf 435: case 8: // signed short
1.91 paf 436: return new VInt((signed short)endian_to_ushort(is_big, value));
1.80 paf 437: case 9: // signed long
1.91 paf 438: return new VInt((signed int)endian_to_uint(is_big, value));
1.80 paf 439: case 10: // signed rational
440: {
441: signed int numerator=(signed int)endian_to_uint(is_big, value); value+=component_size/2;
442: uint denominator=endian_to_uint(is_big, value);
443: if(!denominator)
444: return 0;
1.91 paf 445: return new VDouble(numerator/denominator);
1.80 paf 446: }
447: /*
448: case 11: // single float
1.120 misha 449: @todo
1.80 paf 450: case 12: // double float
1.120 misha 451: @todo
1.80 paf 452: */
453: };
454:
455: return 0;
456: }
457:
1.89 paf 458: // date.C
1.147 moko 459: tm cstr_to_time_t(char *, const char **);
1.89 paf 460:
1.155 moko 461: static Value* parse_IFD_entry_formatted_value(bool is_big, ushort format, size_t component_size, uint components_count, const uchar *value) {
1.80 paf 462: if(format==2) { // ascii string, exception: the only type with varying size
1.91 paf 463: const char* cstr=(const char* )value;
464: size_t length=components_count;
1.89 paf 465: // Data format is "YYYY:MM:DD HH:MM:SS"+0x00, total 20bytes
1.155 moko 466: if(length==JPEG_EXIF_DATE_CHARS && isdigit((unsigned char)cstr[0]) && cstr[length-1]==0) {
467: char cstr_writable[JPEG_EXIF_DATE_CHARS];
1.89 paf 468: strcpy(cstr_writable, cstr);
469:
1.106 paf 470: try {
1.147 moko 471: tm tmIn=cstr_to_time_t(cstr_writable, 0);
1.146 moko 472: return new VDate(tmIn);
1.106 paf 473: }
474: catch(...) { /*ignore bad date times*/ }
1.89 paf 475: }
476:
1.123 misha 477: return new VString(*new String(cstr, String::L_TAINTED));
1.80 paf 478: }
479:
480: if(components_count==1)
1.91 paf 481: return parse_IFD_entry_formatted_one_value(is_big, format, component_size, value);
1.80 paf 482:
1.91 paf 483: VHash* result=new VHash;
484: HashStringValue& hash=result->hash();
1.80 paf 485: for(uint i=0; i<components_count; i++, value+=component_size) {
1.91 paf 486: hash.put(
1.93 paf 487: String::Body::Format(i),
1.91 paf 488: parse_IFD_entry_formatted_one_value(is_big, format, component_size, value));
1.80 paf 489: }
490:
1.91 paf 491: return result;
1.80 paf 492: }
493:
1.155 moko 494: static Value* parse_IFD_entry_value(bool is_big, Measure_reader& reader, long tiff_base, JPG_Exif_IFD_entry& entry) {
1.80 paf 495: size_t format2component_size[]={
496: 0, // undefined
497: 1, // unsigned byte
498: 1, // ascii string
499: 2, // unsigned short
500: 4, // unsigned long
501: 8, // unsigned rational
502: 1, // signed byte
503: 0, // undefined
504: 2, // signed short
505: 4, // signed long
506: 8, // signed rational
507: /*
508: 4, // single float
509: 8, // double float
510: */
511: };
512:
513: ushort format=endian_to_ushort(is_big, entry.format);
514: if(format>=sizeof(format2component_size)/sizeof(format2component_size[0]))
515: return 0; // format out of range, ignoring
516:
517: size_t component_size=format2component_size[format];
518: if(component_size==0)
519: return 0; // undefined format
520:
521: // You can get the total data byte length by multiplies
522: // a 'bytes/components' value (see above chart) by number of components stored 'NNNNNNNN' area
523: uint components_count=endian_to_uint(is_big, entry.components_count);
1.121 misha 524: uint value_size=component_size*components_count;
1.80 paf 525: // If its size is over 4bytes, 'DDDDDDDD' contains the offset to data stored address
1.91 paf 526: Value* result;
1.80 paf 527:
528: if(value_size<=4)
1.155 moko 529: result=parse_IFD_entry_formatted_value(is_big, format, component_size, components_count, entry.value_or_offset_to_it);
1.80 paf 530: else {
531: long remembered=reader.tell();
532: {
533: reader.seek(tiff_base+endian_to_uint(is_big, entry.value_or_offset_to_it), SEEK_SET);
1.91 paf 534: const char* value;
1.156 moko 535: if(reader.read(value, value_size)<value_size)
1.80 paf 536: return 0;
1.155 moko 537: result=parse_IFD_entry_formatted_value(is_big, format, component_size, components_count, (const uchar*)value);
1.80 paf 538: }
539: reader.seek(remembered, SEEK_SET);
540: }
541:
542: return result;
543: }
544:
1.155 moko 545: static void parse_IFD(HashStringValue& hash, bool is_big, Measure_reader& reader, long tiff_base, bool gps=false);
1.91 paf 546:
1.155 moko 547: static void parse_IFD_entry(HashStringValue& hash, bool is_big, Measure_reader& reader, long tiff_base, JPG_Exif_IFD_entry& entry, bool gps=false) {
1.80 paf 548: ushort tag=endian_to_ushort(is_big, entry.tag);
1.118 misha 549:
550: if(tag==JPG_IFD_TAG_EXIF_OFFSET || tag==JPG_IFD_TAG_EXIF_GPS_OFFSET){
1.80 paf 551: long remembered=reader.tell();
552: {
553: reader.seek(tiff_base+endian_to_uint(is_big, entry.value_or_offset_to_it), SEEK_SET);
1.118 misha 554: parse_IFD(hash, is_big, reader, tiff_base, (tag==JPG_IFD_TAG_EXIF_GPS_OFFSET)?true:gps);
1.80 paf 555: }
556: reader.seek(remembered, SEEK_SET);
557: return;
558: }
1.118 misha 559:
1.91 paf 560: if(Value* value=parse_IFD_entry_value(is_big, reader, tiff_base, entry)) {
1.118 misha 561: if(const char* name=(gps)?exif_gps_tag_value2name.get(tag):exif_tag_value2name.get(tag))
1.148 moko 562: hash.put(name, value);
1.80 paf 563: else
1.93 paf 564: hash.put(String::Body::Format(tag), value);
1.80 paf 565: }
1.1 paf 566: }
567:
1.155 moko 568: static void parse_IFD(HashStringValue& hash, bool is_big, Measure_reader& reader, long tiff_base, bool gps) {
1.91 paf 569: const char* buf;
570: if(reader.read(buf, sizeof(JPG_Exif_IFD_begin))<sizeof(JPG_Exif_IFD_begin))
1.80 paf 571: return;
1.91 paf 572: JPG_Exif_IFD_begin *start=(JPG_Exif_IFD_begin *)buf;
1.80 paf 573:
574: ushort directory_entry_count=endian_to_ushort(is_big, start->directory_entry_count);
575: for(int i=0; i<directory_entry_count; i++) {
576: if(reader.read(buf, sizeof(JPG_Exif_IFD_entry))<sizeof(JPG_Exif_IFD_entry))
577: return;
578:
1.118 misha 579: parse_IFD_entry(hash, is_big, reader, tiff_base, *(JPG_Exif_IFD_entry *)buf, gps);
1.80 paf 580: }
581: // then goes: LLLLLLLL Offset to next IFD [not going there]
582: }
583:
1.162 ! moko 584: static Value* parse_exif(Measure_reader& reader) {
1.91 paf 585: const char* buf;
1.80 paf 586:
587: uint tiff_base=reader.tell();
588: if(reader.read(buf, sizeof(JPG_Exif_TIFF_header))<sizeof(JPG_Exif_TIFF_header))
589: return 0;
590:
591: JPG_Exif_TIFF_header *head=(JPG_Exif_TIFF_header *)buf;
592: bool is_big=head->byte_align_identifier[0]=='M'; // [M]otorola vs [I]ntel
593:
594: uint first_IFD_offset=endian_to_uint(is_big, head->first_IFD_offset);
595: reader.seek(tiff_base+first_IFD_offset, SEEK_SET);
596:
1.91 paf 597: VHash* vhash=new VHash;
1.80 paf 598:
599: // IFD
1.91 paf 600: parse_IFD(vhash->hash(), is_big, reader, tiff_base);
1.80 paf 601:
1.91 paf 602: return vhash;
1.80 paf 603: }
604:
1.162 ! moko 605: static Value* parse_xmp(Measure_reader& reader, ushort xmp_length) {
! 606: const char* buf;
! 607: if(reader.read(buf, xmp_length)<xmp_length)
! 608: return 0;
! 609: return new VString(*new String(pa_strdup(buf, xmp_length)));
! 610: }
! 611:
! 612: static void measure_jpeg(const String& origin_string, Measure_reader& reader, Measure_info &info) {
1.2 paf 613: // JFIF format markers
1.80 paf 614: const uchar MARKER=0xFF;
615: const uchar CODE_SIZE_A=0xC0;
616: const uchar CODE_SIZE_B=0xC1;
617: const uchar CODE_SIZE_C=0xC2;
618: const uchar CODE_SIZE_D=0xC3;
1.162 ! moko 619: const uchar CODE_APP1=0xE1;
1.2 paf 620:
1.91 paf 621: const char* buf;
1.18 paf 622: const size_t prefix_size=2;
1.31 parser 623: if(reader.read(buf, prefix_size)<prefix_size)
1.155 moko 624: throw Exception(IMAGE_FORMAT, &origin_string, "not JPEG file - too small");
1.80 paf 625: uchar *signature=(uchar *)buf;
1.1 paf 626:
1.31 parser 627: if(!(signature[0]==0xFF && signature[1]==0xD8))
1.155 moko 628: throw Exception(IMAGE_FORMAT, &origin_string, "not JPEG file - wrong signature");
1.31 parser 629:
630: while(true) {
1.80 paf 631: uint segment_base=reader.tell()+2/*marker,code*/;
1.31 parser 632: if(reader.read(buf, sizeof(JPG_Segment_head))<sizeof(JPG_Segment_head))
1.79 paf 633: break;
1.31 parser 634: JPG_Segment_head *head=(JPG_Segment_head *)buf;
635:
1.162 ! moko 636: // Verify that it's a valid segment.
1.31 parser 637: if(head->marker!=MARKER)
1.155 moko 638: throw Exception(IMAGE_FORMAT, &origin_string, "not JPEG file - marker not found");
1.79 paf 639:
1.162 ! moko 640: ushort segment_length=endian_to_ushort(true, head->length);
! 641:
1.79 paf 642: switch(head->code) {
1.162 ! moko 643: // http://dev.exiv2.org/projects/exiv2/wiki/The_Metadata_in_JPEG_files
! 644: case CODE_APP1:
! 645: {
! 646: const size_t EXIF_SIG_LEN=6; // Exif\0\0
! 647: const size_t XMP_SIG_LEN=29; // http://ns.adobe.com/xap/1.0/\0
! 648:
! 649: if(segment_length<EXIF_SIG_LEN+2 || reader.read(buf, EXIF_SIG_LEN)<EXIF_SIG_LEN)
! 650: break;
! 651: if(memcmp(buf, "Exif\0\0", EXIF_SIG_LEN)==0){
! 652: if(info.exif && !*info.exif) // backward compatibility: using first segment
! 653: *info.exif=parse_exif(reader);
! 654: break;
! 655: }
! 656:
! 657: if(memcmp(buf, "http:/", EXIF_SIG_LEN))
! 658: break;
! 659: if(segment_length<XMP_SIG_LEN+2 || reader.read(buf, XMP_SIG_LEN-EXIF_SIG_LEN)<XMP_SIG_LEN-EXIF_SIG_LEN)
! 660: break;
! 661: if(memcmp(buf, "/ns.adobe.com/xap/1.0/\0", XMP_SIG_LEN-EXIF_SIG_LEN)==0){
! 662: if(info.xmp && !*info.xmp) // backward compatibility: using first segment
! 663: *info.xmp=parse_xmp(reader, segment_length - XMP_SIG_LEN - 2 /* segment_length */);
! 664: }
! 665:
! 666: }
1.1 paf 667: break;
1.31 parser 668:
1.79 paf 669: case CODE_SIZE_A:
670: case CODE_SIZE_B:
671: case CODE_SIZE_C:
672: case CODE_SIZE_D:
673: {
674: // Segments that contain size info
675: if(reader.read(buf, sizeof(JPG_Size_segment_body))<sizeof(JPG_Size_segment_body))
1.155 moko 676: throw Exception(IMAGE_FORMAT, &origin_string, "not JPEG file - can not fully read Size segment");
1.79 paf 677: JPG_Size_segment_body *body=(JPG_Size_segment_body *)buf;
678:
1.162 ! moko 679: info.width=endian_to_ushort(true, body->width);
! 680: info.height=endian_to_ushort(true, body->height);
! 681: }
1.80 paf 682: return;
1.79 paf 683: };
684:
1.162 ! moko 685: reader.seek(segment_base + segment_length, SEEK_SET);
1.31 parser 686: }
687:
1.155 moko 688: throw Exception(IMAGE_FORMAT, &origin_string, "broken JPEG file - size frame not found");
1.1 paf 689: }
690:
1.152 moko 691: static void measure_png(const String& origin_string, Measure_reader& reader, ushort& width, ushort& height) {
1.72 paf 692:
1.91 paf 693: const char* buf;
1.102 paf 694: const size_t head_size=sizeof(PNG_Header);
695: if(reader.read(buf, head_size)<head_size)
1.152 moko 696: throw Exception(IMAGE_FORMAT, &origin_string, "not PNG file - too small");
1.72 paf 697: PNG_Header *head=(PNG_Header *)buf;
698:
699: if(strncmp(head->signature, "IHDR", 4)!=0)
1.152 moko 700: throw Exception(IMAGE_FORMAT, &origin_string, "not PNG file - wrong signature");
1.72 paf 701:
1.80 paf 702: width=endian_to_ushort(true, head->width);
703: height=endian_to_ushort(true, head->height);
1.72 paf 704: }
705:
1.1 paf 706: // measure center
707:
1.162 ! moko 708: static void measure(const String& file_name, Measure_reader& reader, Measure_info &info) {
1.128 misha 709: const char* file_name_cstr=file_name.taint_cstr(String::L_FILE_SPEC);
1.91 paf 710: if(const char* cext=strrchr(file_name_cstr, '.')) {
1.1 paf 711: cext++;
712: if(strcasecmp(cext, "GIF")==0)
1.162 ! moko 713: measure_gif(file_name, reader, info.width, info.height);
1.1 paf 714: else if(strcasecmp(cext, "JPG")==0 || strcasecmp(cext, "JPEG")==0)
1.162 ! moko 715: measure_jpeg(file_name, reader, info);
1.72 paf 716: else if(strcasecmp(cext, "PNG")==0)
1.162 ! moko 717: measure_png(file_name, reader, info.width, info.height);
1.1 paf 718: else
1.152 moko 719: throw Exception(IMAGE_FORMAT, &file_name, "unhandled image file name extension '%s'", cext);
1.1 paf 720: } else
1.152 moko 721: throw Exception(IMAGE_FORMAT, &file_name, "can not determine image type - no file name extension");
1.1 paf 722: }
723:
1.77 paf 724: // methods
1.1 paf 725:
1.152 moko 726: static void file_measure_action(struct stat& /*finfo*/, int f, const String& file_spec, void *context) {
727: Measure_file_reader reader(f, file_spec);
1.162 ! moko 728: measure(file_spec, reader, *static_cast<Measure_info *>(context));
1.1 paf 729: }
730:
1.91 paf 731: static void _measure(Request& r, MethodParams& params) {
732: Value& data=params.as_no_junction(0, "data must not be code");
1.1 paf 733:
1.91 paf 734: Value* exif=0;
1.162 ! moko 735: Value* xmp=0;
! 736: Measure_info info={ 0, 0, &exif, &xmp };
! 737:
1.91 paf 738: const String* file_name;
1.162 ! moko 739:
! 740: if(file_name=data.get_string()) {
1.152 moko 741: file_read_action_under_lock(r.absolute(*file_name), "measure", file_measure_action, &info);
1.1 paf 742: } else {
1.129 misha 743: VFile* vfile=data.as_vfile(String::L_AS_IS);
1.91 paf 744: file_name=&vfile->fields().get(name_name)->as_string();
1.162 ! moko 745: Measure_buf_reader reader(vfile->value_ptr(), vfile->value_size(), *file_name);
! 746: measure(*file_name, reader, info);
1.1 paf 747: }
748:
1.162 ! moko 749: GET_SELF(r, VImage).set(file_name, info.width, info.height, 0, exif, xmp);
1.1 paf 750: }
751:
1.161 moko 752: static void append_attrib_pair(String &tag, String::Body key, Value* value){
753: // skip border attribute with empty value
754: if(key=="border" && !value->is_defined())
1.4 paf 755: return;
756:
1.133 misha 757: // src="a.gif" width="123" ismap[=-1]
1.161 moko 758: tag << " " << key;
1.91 paf 759: if(value->is_string() || value->as_int()>=0)
1.161 moko 760: tag << "=\"" << value->as_string() << "\"";
1.3 paf 761: }
1.161 moko 762:
1.91 paf 763: static void _html(Request& r, MethodParams& params) {
764: String tag;
1.3 paf 765: tag << "<img";
1.4 paf 766:
1.91 paf 767: const HashStringValue& fields=GET_SELF(r, VImage).fields();
768: HashStringValue* attribs=0;
1.4 paf 769:
1.91 paf 770: if(params.count()) {
1.69 paf 771: // for backward compatibility: someday was ^html{}
1.154 moko 772: Value& vattribs=r.process(params[0]);
1.145 moko 773: if(!vattribs.is_string()) { // allow empty
1.100 paf 774: if((attribs=vattribs.get_hash())) {
1.161 moko 775: for(HashStringValue::Iterator i(*attribs); i; i.next() )
776: append_attrib_pair(tag, i.key(), i.value());
1.39 parser 777: } else
1.155 moko 778: throw Exception(PARSER_RUNTIME, 0, "attributes must be hash");
1.145 moko 779: }
1.39 parser 780: }
1.4 paf 781:
1.161 moko 782: for(HashStringValue::Iterator i(fields); i; i.next() ){
783: String::Body key=i.key();
784: // skip user-specified attributes
785: if(attribs && attribs->get(key))
786: continue;
787: // allow only html attributes (to exclude exif, line-*)
788: if(key=="src" || key=="width" || key=="height" || key=="border")
789: append_attrib_pair(tag, key, i.value());
1.91 paf 790: }
1.161 moko 791:
1.6 paf 792: tag << " />";
1.157 moko 793: r.write(tag);
1.3 paf 794: }
1.8 paf 795:
1.68 paf 796: /// @test wrap FILE to auto-object
1.155 moko 797: static gdImage* load(Request& r, const String& file_name){
1.128 misha 798: const char* file_name_cstr=r.absolute(file_name).taint_cstr(String::L_FILE_SPEC);
1.159 moko 799: if(FILE *f=pa_fopen(file_name_cstr, "rb")) {
1.91 paf 800: gdImage* image=new gdImage;
801: bool ok=image->CreateFromGif(f);
1.16 paf 802: fclose(f);
1.23 paf 803: if(!ok)
1.155 moko 804: throw Exception(IMAGE_FORMAT, &file_name, "is not in GIF format");
1.91 paf 805: return image;
1.16 paf 806: } else {
1.155 moko 807: throw Exception("file.missing", 0, "can not open '%s'", file_name_cstr);
1.16 paf 808: }
809: }
810:
811:
1.91 paf 812: static void _load(Request& r, MethodParams& params) {
1.116 misha 813: const String& file_name=params.as_string(0, FILE_NAME_MUST_NOT_BE_CODE);
1.6 paf 814:
1.91 paf 815: gdImage* image=load(r, file_name);
816: GET_SELF(r, VImage).set(&file_name, image->SX(), image->SY(), image);
1.6 paf 817: }
818:
1.91 paf 819: static void _create(Request& r, MethodParams& params) {
820: int width=params.as_int(0, "width must be int", r);
821: int height=params.as_int(1, "height must be int", r);
1.8 paf 822: int bgcolor_value=0xffFFff;
1.91 paf 823: if(params.count()>2)
824: bgcolor_value=params.as_int(2, "color must be int", r);
825: gdImage* image=new gdImage;
826: image->Create(width, height);
827: image->FilledRectangle(0, 0, width-1, height-1, image->Color(bgcolor_value));
828: GET_SELF(r, VImage).set(0, width, height, image);
1.6 paf 829: }
830:
1.91 paf 831: static void _gif(Request& r, MethodParams& params) {
1.108 paf 832: gdImage& image=GET_SELF(r, VImage).image();
1.6 paf 833:
1.138 misha 834: const String *file_name=params.count()>0?¶ms.as_string(0, FILE_NAME_MUST_BE_STRING):0;
1.10 paf 835:
1.108 paf 836: gdBuf buf=image.Gif();
1.6 paf 837:
1.91 paf 838: VFile& vfile=*new VFile;
1.137 misha 839:
1.142 moko 840: vfile.set_binary(false/*not tainted*/, (const char *)buf.ptr, buf.size, file_name, new VString(*new String("image/gif")));
1.137 misha 841:
1.157 moko 842: r.write(vfile);
1.6 paf 843: }
844:
1.91 paf 845: static void _line(Request& r, MethodParams& params) {
1.108 paf 846: gdImage& image=GET_SELF(r, VImage).image();
1.12 paf 847:
1.108 paf 848: image.Line(
1.91 paf 849: params.as_int(0, "x0 must be int", r),
850: params.as_int(1, "y0 must be int", r),
851: params.as_int(2, "x1 must be int", r),
852: params.as_int(3, "y1 must be int", r),
1.108 paf 853: image.Color(params.as_int(4, "color must be int", r)));
1.13 paf 854: }
855:
1.91 paf 856: static void _fill(Request& r, MethodParams& params) {
1.108 paf 857: gdImage& image=GET_SELF(r, VImage).image();
1.12 paf 858:
1.108 paf 859: image.Fill(
1.91 paf 860: params.as_int(0, "x must be int", r),
861: params.as_int(1, "y must be int", r),
1.108 paf 862: image.Color(params.as_int(2, "color must be int", r)));
1.13 paf 863: }
864:
1.91 paf 865: static void _rectangle(Request& r, MethodParams& params) {
1.108 paf 866: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 867:
1.108 paf 868: image.Rectangle(
1.91 paf 869: params.as_int(0, "x0 must be int", r),
870: params.as_int(1, "y0 must be int", r),
871: params.as_int(2, "x1 must be int", r),
872: params.as_int(3, "y1 must be int", r),
1.108 paf 873: image.Color(params.as_int(4, "color must be int", r)));
1.13 paf 874: }
875:
1.91 paf 876: static void _bar(Request& r, MethodParams& params) {
1.108 paf 877: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 878:
1.108 paf 879: image.FilledRectangle(
1.91 paf 880: params.as_int(0, "x0 must be int", r),
881: params.as_int(1, "y0 must be int", r),
882: params.as_int(2, "x1 must be int", r),
883: params.as_int(3, "y1 must be int", r),
1.108 paf 884: image.Color(params.as_int(4, "color must be int", r)));
1.13 paf 885: }
886:
1.44 parser 887: #ifndef DOXYGEN
1.155 moko 888: static void add_point(Table::element_type row, gdImage::Point **p) {
1.110 paf 889: if(row->count()!=2)
1.155 moko 890: throw Exception(0, 0, "coordinates table must contain two columns: x and y values");
1.91 paf 891: (**p).x=row->get(0)->as_int();
892: (**p).y=row->get(1)->as_int();
1.44 parser 893: (*p)++;
894: }
895: #endif
1.135 misha 896: #ifndef DOXYGEN
1.155 moko 897: static void add_point(int x, int y, gdImage::Point **p) {
1.135 misha 898: (**p).x=x;
899: (**p).y=y;
900: (*p)++;
901: }
902: #endif
1.91 paf 903: static void _replace(Request& r, MethodParams& params) {
1.135 misha 904: int src_color=params.as_int(0, "src color must be int", r);
905: int dest_color=params.as_int(1, "dest color must be int", r);
906:
1.108 paf 907: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 908:
1.135 misha 909: gdImage::Point* all_p=0;
910: size_t count=0;
911: if(params.count() == 3){
1.140 misha 912: Table* table=params.as_table(2, "coordinates");
1.135 misha 913: count=table->count();
914: all_p=new(PointerFreeGC) gdImage::Point[count];
915: gdImage::Point* add_p=all_p;
916: table->for_each(add_point, &add_p);
917: } else {
918: int max_x=image.SX()-1;
919: int max_y=image.SY()-1;
920: if(max_x > 0 && max_y > 0){
921: count=4;
922: all_p=new(PointerFreeGC) gdImage::Point[count];
923: gdImage::Point* add_p=all_p;
924: add_point(0, 0, &add_p);
925: add_point(max_x, 0, &add_p);
926: add_point(max_x, max_y, &add_p);
927: add_point(0, max_y, &add_p);
928: }
929: }
1.13 paf 930:
1.135 misha 931: if(count)
932: image.FilledPolygonReplaceColor(all_p, count, image.Color(src_color), image.Color(dest_color));
1.13 paf 933: }
934:
1.91 paf 935: static void _polyline(Request& r, MethodParams& params) {
1.108 paf 936: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 937:
1.140 misha 938: Table* table=params.as_table(1, "coordinates");
1.44 parser 939:
1.92 paf 940: gdImage::Point* all_p=new(PointerFreeGC) gdImage::Point[table->count()];
1.44 parser 941: gdImage::Point *add_p=all_p;
942: table->for_each(add_point, &add_p);
1.108 paf 943: image.Polygon(all_p, table->count(),
944: image.Color(params.as_int(0, "color must be int", r)),
1.44 parser 945: false/*not closed*/);
946: }
947:
1.91 paf 948: static void _polygon(Request& r, MethodParams& params) {
1.108 paf 949: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 950:
1.140 misha 951: Table* table=(Table*)params.as_table(1, "coordinates");
1.44 parser 952:
1.92 paf 953: gdImage::Point* all_p=new(PointerFreeGC) gdImage::Point[table->count()];
1.44 parser 954: gdImage::Point *add_p=all_p;
955: table->for_each(add_point, &add_p);
1.108 paf 956: image.Polygon(all_p, table->count(),
957: image.Color(params.as_int(0, "color must be int", r)));
1.13 paf 958: }
959:
1.91 paf 960: static void _polybar(Request& r, MethodParams& params) {
1.108 paf 961: gdImage& image=GET_SELF(r, VImage).image();
1.13 paf 962:
1.140 misha 963: Table* table=(Table*)params.as_table(1, "coordinates");
1.13 paf 964:
1.92 paf 965: gdImage::Point* all_p=new(PointerFreeGC) gdImage::Point[table->count()];
1.44 parser 966: gdImage::Point *add_p=all_p;
967: table->for_each(add_point, &add_p);
1.108 paf 968: image.FilledPolygon(all_p, table->count(),
969: image.Color(params.as_int(0, "color must be int", r)));
1.12 paf 970: }
971:
1.16 paf 972: // font
973:
1.85 paf 974: #define Y(y)(y+index*height)
1.21 paf 975:
1.91 paf 976: // Font class
977:
1.155 moko 978: Font::Font(Charset& asource_charset, const String& aalphabet, gdImage* aifont, int aheight, int amonospace, int aspacebarspace, int aletterspacing):
1.158 moko 979: letterspacing(aletterspacing),
1.132 misha 980: height(aheight),
981: monospace(amonospace),
982: spacebarspace(aspacebarspace),
1.100 paf 983: ifont(aifont),
1.158 moko 984: alphabet(aalphabet),
985: fsource_charset(asource_charset){
1.132 misha 986:
987: if(fsource_charset.isUTF8()){
988: size_t index=0;
989: for(UTF8_string_iterator i(alphabet); i.has_next(); )
990: fletter2index.put_dont_replace(i.next(), index++);
991: }
1.91 paf 992: }
993:
994: /* ******************************** char ********************************** */
995:
996: size_t Font::index_of(char ch) {
997: if(ch==' ') return STRING_NOT_FOUND;
998: return alphabet.pos(ch);
999: }
1000:
1.132 misha 1001: size_t Font::index_of(XMLCh ch) {
1002: if(ch==' ') return STRING_NOT_FOUND;
1003: return fletter2index.get(ch);
1004: }
1005:
1.91 paf 1006: int Font::index_width(size_t index) {
1007: if(index==STRING_NOT_FOUND)
1008: return spacebarspace;
1009: int tr=ifont->GetTransparent();
1010: for(int x=ifont->SX()-1; x>=0; x--) {
1011: for(int y=0; y<height; y++)
1012: if(ifont->GetPixel(x, Y(y))!=tr)
1013: return x+1;
1.16 paf 1014: }
1.91 paf 1015: return 0;
1016: }
1017:
1.108 paf 1018: void Font::index_display(gdImage& image, int x, int y, size_t index){
1.91 paf 1019: if(index!=STRING_NOT_FOUND)
1.108 paf 1020: ifont->Copy(image, x, y, 0, Y(0), index_width(index), height);
1.91 paf 1021: }
1022:
1023: /* ******************************** string ********************************** */
1024:
1025: int Font::step_width(int index) {
1.125 misha 1026: return letterspacing + (monospace ? monospace : index_width(index));
1.91 paf 1027: }
1028:
1029: // counts trailing letter_spacing, consider this OK. useful for contiuations
1030: int Font::string_width(const String& s){
1031: const char* cstr=s.cstr();
1032: int result=0;
1.132 misha 1033:
1034: if(fsource_charset.isUTF8()){
1035: for(UTF8_string_iterator i(s); i.has_next(); )
1036: result+=step_width(index_of(i.next()));
1037: } else {
1038: for(const char* current=cstr; *current; current++)
1039: result+=step_width(index_of(*current));
1040: }
1041:
1.91 paf 1042: return result;
1043: }
1044:
1.108 paf 1045: void Font::string_display(gdImage& image, int x, int y, const String& s){
1.91 paf 1046: const char* cstr=s.cstr();
1.132 misha 1047:
1048: if(fsource_charset.isUTF8()){
1049: for(UTF8_string_iterator i(s); i.has_next(); ){
1050: size_t index=index_of(i.next());
1051: index_display(image, x, y, index);
1052: x+=step_width(index);
1053: }
1054: } else {
1055: for(const char* current=cstr; *current; current++) {
1056: size_t index=index_of(*current);
1057: index_display(image, x, y, index);
1058: x+=step_width(index);
1059: }
1.87 paf 1060: }
1.91 paf 1061: }
1.87 paf 1062:
1.91 paf 1063: //
1.35 parser 1064:
1.16 paf 1065:
1.91 paf 1066: static void _font(Request& r, MethodParams& params) {
1067: const String& alphabet=params.as_string(0, "alphabet must not be code");
1.131 misha 1068: size_t alphabet_length=alphabet.length(r.charsets.source());
1069: if(!alphabet_length)
1.155 moko 1070: throw Exception(PARSER_RUNTIME, 0, "alphabet must not be empty");
1.84 paf 1071:
1.125 misha 1072: gdImage* image=load(r, params.as_string(1, FILE_NAME_MUST_NOT_BE_CODE));
1073:
1.126 misha 1074: int spacebar_width=image->SX();
1.125 misha 1075: int monospace_width=0; // proportional
1076: int letter_spacing=1;
1077: if(params.count()>2){
1.144 moko 1078: if(HashStringValue* options=params[2].get_hash()){
1.125 misha 1079: // third option is hash
1080: if(params.count()>3)
1.144 moko 1081: throw Exception(PARSER_RUNTIME, 0, "too many params were specified");
1.125 misha 1082: int valid_options=0;
1083: if(Value* vspacebar_width=options->get(spacebar_width_name)){
1084: valid_options++;
1.153 moko 1085: spacebar_width=r.process(*vspacebar_width).as_int();
1.125 misha 1086: }
1087: if(Value* vmonospace_width=options->get(monospace_width_name)){
1088: valid_options++;
1.153 moko 1089: monospace_width=r.process(*vmonospace_width).as_int();
1.125 misha 1090: if(!monospace_width)
1091: monospace_width=image->SX();
1092: }
1093: if(Value* vletter_spacing=options->get(letter_spacing_name)){
1094: valid_options++;
1.153 moko 1095: letter_spacing=r.process(*vletter_spacing).as_int();
1.125 misha 1096: }
1097: if(valid_options!=options->count())
1.134 misha 1098: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.125 misha 1099: } else {
1100: // backward
1.144 moko 1101: spacebar_width=params.as_int(2, "param must be int or hash", r);
1.125 misha 1102: if(params.count()>3) {
1103: monospace_width=params.as_int(3, "monospace_width must be int", r);
1104: if(!monospace_width)
1105: monospace_width=image->SX();
1106: }
1107: }
1108: }
1109:
1.131 misha 1110: if(int remainder=image->SY() % alphabet_length)
1.155 moko 1111: throw Exception(PARSER_RUNTIME, 0, "font-file height(%d) not divisable by alphabet size(%d), remainder=%d", image->SY(), alphabet_length, remainder);
1.37 parser 1112:
1.155 moko 1113: GET_SELF(r, VImage).set_font(new Font(r.charsets.source(), alphabet, image, image->SY() / alphabet_length, monospace_width, spacebar_width, letter_spacing));
1.16 paf 1114: }
1115:
1.91 paf 1116: static void _text(Request& r, MethodParams& params) {
1117: int x=params.as_int(0, "x must be int", r);
1118: int y=params.as_int(1, "y must be int", r);
1119: const String& s=params.as_string(2, "text must not be code");
1.16 paf 1120:
1.91 paf 1121: VImage& vimage=GET_SELF(r, VImage);
1.108 paf 1122: vimage.font().string_display(vimage.image(), x, y, s);
1.16 paf 1123: }
1124:
1.91 paf 1125: static void _length(Request& r, MethodParams& params) {
1126: const String& s=params.as_string(0, "text must not be code");
1.47 parser 1127:
1.91 paf 1128: VImage& vimage=GET_SELF(r, VImage);
1.157 moko 1129: r.write(*new VInt(vimage.font().string_width(s)));
1.47 parser 1130: }
1131:
1.91 paf 1132: static void _arc(Request& r, MethodParams& params) {
1.108 paf 1133: gdImage& image=GET_SELF(r, VImage).image();
1.48 parser 1134:
1.108 paf 1135: image.Arc(
1.91 paf 1136: params.as_int(0, "center_x must be int", r),
1137: params.as_int(1, "center_y must be int", r),
1138: params.as_int(2, "width must be int", r),
1139: params.as_int(3, "height must be int", r),
1140: params.as_int(4, "start degrees must be int", r),
1141: params.as_int(5, "end degrees must be int", r),
1.108 paf 1142: image.Color(params.as_int(6, "cx must be int", r)));
1.48 parser 1143: }
1144:
1.91 paf 1145: static void _sector(Request& r, MethodParams& params) {
1.108 paf 1146: gdImage& image=GET_SELF(r, VImage).image();
1.49 parser 1147:
1.108 paf 1148: image.Sector(
1.91 paf 1149: params.as_int(0, "center_x must be int", r),
1150: params.as_int(1, "center_y must be int", r),
1151: params.as_int(2, "width must be int", r),
1152: params.as_int(3, "height must be int", r),
1153: params.as_int(4, "start degrees must be int", r),
1154: params.as_int(5, "end degrees must be int", r),
1.108 paf 1155: image.Color(params.as_int(6, "color must be int", r)));
1.49 parser 1156: }
1157:
1.91 paf 1158: static void _circle(Request& r, MethodParams& params) {
1.108 paf 1159: gdImage& image=GET_SELF(r, VImage).image();
1.48 parser 1160:
1.91 paf 1161: int size=params.as_int(2, "radius must be int", r)*2;
1.108 paf 1162: image.Arc(
1.91 paf 1163: params.as_int(0, "center_x must be int", r),
1164: params.as_int(1, "center_y must be int", r),
1.50 parser 1165: size, //w
1166: size, //h
1.48 parser 1167: 0, //s
1168: 360, //e
1.108 paf 1169: image.Color(params.as_int(3, "color must be int", r)));
1.48 parser 1170: }
1171:
1.108 paf 1172: gdImage& as_image(MethodParams& params, int index, const char* msg) {
1.91 paf 1173: Value& value=params.as_no_junction(index, msg);
1.53 parser 1174:
1.130 misha 1175: if(Value* vimage=value.as(VIMAGE_TYPE)) {
1.108 paf 1176: return static_cast<VImage *>(vimage)->image();
1.75 paf 1177: } else
1.155 moko 1178: throw Exception(PARSER_RUNTIME, 0, msg);
1.53 parser 1179: }
1180:
1.91 paf 1181: static void _copy(Request& r, MethodParams& params) {
1.108 paf 1182: gdImage& dest=GET_SELF(r, VImage).image();
1.53 parser 1183:
1.108 paf 1184: gdImage& src=as_image(params, 0, "src must be image");
1.53 parser 1185:
1.91 paf 1186: int sx=params.as_int(1, "src_x must be int", r);
1187: int sy=params.as_int(2, "src_y must be int", r);
1188: int sw=params.as_int(3, "src_w must be int", r);
1189: int sh=params.as_int(4, "src_h must be int", r);
1190: int dx=params.as_int(5, "dest_x must be int", r);
1191: int dy=params.as_int(6, "dest_y must be int", r);
1192: if(params.count()>1+2+2+2) {
1193: int dw=params.as_int(1+2+2+2, "dest_w must be int", r);
1194: int dh=(int)(params.count()>1+2+2+2+1?
1195: params.as_int(1+2+2+2+1, "dest_h must be int", r):sh*(((double)dw)/((double)sw)));
1196: int tolerance=params.count()>1+2+2+2+2?
1197: params.as_int(1+2+2+2+2, "tolerance must be int", r):150;
1.53 parser 1198:
1.108 paf 1199: src.CopyResampled(dest, dx, dy, sx, sy, dw, dh, sw, sh, tolerance);
1.53 parser 1200: } else
1.108 paf 1201: src.Copy(dest, dx, dy, sx, sy, sw, sh);
1202: }
1203:
1204: static void _pixel(Request& r, MethodParams& params) {
1205: gdImage& image=GET_SELF(r, VImage).image();
1206:
1.109 paf 1207: int x=params.as_int(0, "x must be int", r);
1208: int y=params.as_int(1, "y must be int", r);
1209:
1210: if(params.count()>2) {
1211: image.SetPixel(x, y,
1212: image.Color(params.as_int(2, "color must be int", r)));
1213: } else
1.157 moko 1214: r.write(*new VInt(image.DecodeColor(image.GetPixel(x, y))));
1.53 parser 1215: }
1216:
1217:
1.22 paf 1218: // constructor
1219:
1.91 paf 1220: MImage::MImage(): Methoded("image") {
1.1 paf 1221: // ^image:measure[DATA]
1.22 paf 1222: add_native_method("measure", Method::CT_DYNAMIC, _measure, 1, 1);
1.3 paf 1223:
1.25 paf 1224: // ^image.html[]
1225: // ^image.html[hash]
1.22 paf 1226: add_native_method("html", Method::CT_DYNAMIC, _html, 0, 1);
1.6 paf 1227:
1.25 paf 1228: // ^image.load[background.gif]
1.22 paf 1229: add_native_method("load", Method::CT_DYNAMIC, _load, 1, 1);
1.6 paf 1230:
1.25 paf 1231: // ^image.create[width;height] bgcolor=white
1232: // ^image.create[width;height;bgcolor]
1.22 paf 1233: add_native_method("create", Method::CT_DYNAMIC, _create, 2, 3);
1.6 paf 1234:
1.25 paf 1235: // ^image.gif[]
1.95 paf 1236: add_native_method("gif", Method::CT_DYNAMIC, _gif, 0, 1);
1.12 paf 1237:
1.25 paf 1238: // ^image.line(x0;y0;x1;y1;color)
1.22 paf 1239: add_native_method("line", Method::CT_DYNAMIC, _line, 5, 5);
1.13 paf 1240:
1.25 paf 1241: // ^image.fill(x;y;color)
1.22 paf 1242: add_native_method("fill", Method::CT_DYNAMIC, _fill, 3, 3);
1.13 paf 1243:
1.25 paf 1244: // ^image.rectangle(x0;y0;x1;y1;color)
1.22 paf 1245: add_native_method("rectangle", Method::CT_DYNAMIC, _rectangle, 5, 5);
1.13 paf 1246:
1.25 paf 1247: // ^image.bar(x0;y0;x1;y1;color)
1.22 paf 1248: add_native_method("bar", Method::CT_DYNAMIC, _bar, 5, 5);
1.13 paf 1249:
1.44 parser 1250: // ^image.replace(color-source;color-dest)[table x:y]
1.135 misha 1251: // ^image.replace(color-source;color-dest)
1252: add_native_method("replace", Method::CT_DYNAMIC, _replace, 2, 3);
1.44 parser 1253:
1254: // ^image.polyline(color)[table x:y]
1255: add_native_method("polyline", Method::CT_DYNAMIC, _polyline, 2, 2);
1.13 paf 1256:
1.44 parser 1257: // ^image.polygon(color)[table x:y]
1258: add_native_method("polygon", Method::CT_DYNAMIC, _polygon, 2, 2);
1.13 paf 1259:
1.44 parser 1260: // ^image.polybar(color)[table x:y]
1261: add_native_method("polybar", Method::CT_DYNAMIC, _polybar, 2, 2);
1.13 paf 1262:
1.125 misha 1263: // ^image.font[alPHAbet;font-file-name.gif]
1264: // ^image.font[alPHAbet;font-file-name.gif](spacebar_width)
1265: // ^image.font[alPHAbet;font-file-name.gif](spacebar_width;letter_width)
1266: // ^image.font[alPHAbet;font-file-name.gif][$.space-width(.) $.letter-width(.) $.letter-space(.)]
1267: add_native_method("font", Method::CT_DYNAMIC, _font, 2, 4);
1.16 paf 1268:
1.125 misha 1269: // ^image.text(x;y)[text]
1.22 paf 1270: add_native_method("text", Method::CT_DYNAMIC, _text, 3, 3);
1.47 parser 1271:
1.125 misha 1272: // ^image.length[text]
1.47 parser 1273: add_native_method("length", Method::CT_DYNAMIC, _length, 1, 1);
1.16 paf 1274:
1.48 parser 1275: // ^image.arc(center x;center y;width;height;start in degrees;end in degrees;color)
1276: add_native_method("arc", Method::CT_DYNAMIC, _arc, 7, 7);
1.49 parser 1277:
1278: // ^image.sector(center x;center y;width;height;start in degrees;end in degrees;color)
1279: add_native_method("sector", Method::CT_DYNAMIC, _sector, 7, 7);
1.48 parser 1280:
1281: // ^image.circle(center x;center y;r;color)
1282: add_native_method("circle", Method::CT_DYNAMIC, _circle, 4, 4);
1283:
1.56 parser 1284: // ^image.copy[source](src x;src y;src w;src h;dst x;dst y[;dest w[;dest h[;tolerance]]])
1285: add_native_method("copy", Method::CT_DYNAMIC, _copy, 1+2+2+2, (1+2+2+2)+2+1);
1.108 paf 1286:
1287: // ^image.pixel(x;y)[(color)]
1.109 paf 1288: add_native_method("pixel", Method::CT_DYNAMIC, _pixel, 2, 3);
1.1 paf 1289: }
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