Annotation of parser3/src/classes/image.C, revision 1.90.2.14
1.1 paf 1: /** @file
2: Parser: @b image parser class.
3:
1.90.2.3 paf 4: Copyright(c) 2001-2003 ArtLebedev Group (http://www.artlebedev.com)
1.66 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.73 paf 6: */
1.1 paf 7:
1.90.2.14! paf 8: static const char* IDENT_IMAGE_C="$Date: 2003/03/04 12:38:15 $";
1.31 parser 9:
10: /*
11: jpegsize: gets the width and height (in pixels) of a jpeg file
12: Andrew Tong, werdna@ugcs.caltech.edu February 14, 1995
13: modified slightly by alex@ed.ac.uk
14: and further still by rjray@uswest.com
15: optimization and general re-write from tmetro@vl.com
16: from perl by paf@design.ru
1.1 paf 17: */
18:
19: #include "pa_config_includes.h"
1.90.2.5 paf 20:
21: #include "pa_vmethod_frame.h"
1.1 paf 22:
1.8 paf 23: #include "gif.h"
1.6 paf 24:
1.1 paf 25: #include "pa_common.h"
26: #include "pa_request.h"
27: #include "pa_vfile.h"
28: #include "pa_vimage.h"
1.89 paf 29: #include "pa_vdate.h"
1.90.2.7 paf 30: #include "pa_table.h"
1.1 paf 31:
1.22 paf 32: // class
33:
1.90.2.9 paf 34: class MImage: public Methoded {
1.22 paf 35: public: // VStateless_class
1.90.2.2 paf 36: ValuePtr create_new_value() { return ValuePtr(new VImage()); }
1.22 paf 37:
38: public:
1.90.2.7 paf 39: MImage();
1.24 paf 40:
41: public: // Methoded
1.22 paf 42: bool used_directly() { return true; }
43:
44: };
1.1 paf 45:
1.90.2.7 paf 46: // globals
47:
1.90.2.12 paf 48: DECLARE_CLASS_VAR(image, new MImage, 0);
1.90.2.7 paf 49:
1.1 paf 50: // helpers
51:
1.90.2.1 paf 52: /// value of exif tag -> it's value
1.90.2.7 paf 53: class EXIF_tag_value2name: public Hash<int, const char* > {
54: public:
55: EXIF_tag_value2name() {
56: // image JPEG Exif
57: #define EXIF_TAG(tag, name) \
58: exif_tag_value2name.put(tag, #name);
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);
133: EXIF_TAG(0x8825, GPSInfo);
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);
150: #undef EXIF_TAG
151: }
152: } exif_tag_value2name;
1.90.2.1 paf 153:
154:
1.43 parser 155: #ifndef DOXYGEN
1.1 paf 156: class Measure_reader {
157: public:
1.90.2.7 paf 158: virtual size_t read(const char *&buf, size_t limit)=0;
1.79 paf 159: virtual void seek(long value, int whence)=0;
160: virtual long tell()=0;
1.77 paf 161: };
1.1 paf 162:
1.77 paf 163: class Measure_file_reader: public Measure_reader {
1.90.2.7 paf 164:
165: Pool& pool;
166: StringPtr file_name; const char* fname;
167: int f;
168:
1.77 paf 169: public:
1.90.2.7 paf 170: Measure_file_reader(Pool& apool, int af, StringPtr afile_name, const char* afname):
1.77 paf 171: pool(apool), file_name(afile_name), fname(afname), f(af) {
1.1 paf 172: }
173:
1.90.2.7 paf 174: override size_t read(const char *&abuf, size_t limit) {
1.77 paf 175: if(limit==0)
1.1 paf 176: return 0;
1.77 paf 177:
1.90.2.7 paf 178: char* lbuf=new(pool) char[limit];
1.77 paf 179: size_t read_size=(size_t)::read(f, lbuf, limit); abuf=lbuf;
180: if(ssize_t(read_size)<0 || read_size>limit)
181: throw Exception(0,
1.90.2.7 paf 182: file_name,
1.77 paf 183: "measure failed: actually read %lu bytes count not in [0..%lu] valid range",
184: read_size, limit);
185:
1.1 paf 186: return read_size;
187: }
188:
1.90.2.7 paf 189: override void seek(long value, int whence) {
1.79 paf 190: if(lseek(f, value, whence)<0)
1.88 paf 191: throw Exception("image.format",
1.90.2.7 paf 192: file_name,
1.79 paf 193: "seek(value=%ld, whence=%d) failed: %s (%d), actual filename '%s'",
194: value, whence, strerror(errno), errno, fname);
1.77 paf 195: }
196:
1.90.2.7 paf 197: override long tell() { return lseek(f, 0, SEEK_CUR); }
1.79 paf 198:
1.77 paf 199: };
200:
201: class Measure_buf_reader: public Measure_reader {
1.90.2.7 paf 202:
203: const char* buf; size_t size;
204: StringPtr file_name;
205:
206: size_t offset;
207:
1.77 paf 208: public:
1.90.2.7 paf 209: Measure_buf_reader(const char* abuf, size_t asize, StringPtr afile_name):
1.77 paf 210: buf(abuf), size(asize), file_name(afile_name), offset(0) {
211: }
212:
1.90.2.7 paf 213: override size_t read(const char *&abuf, size_t limit) {
1.77 paf 214: size_t to_read=min(limit, size-offset);
1.90.2.7 paf 215: abuf=buf+offset;
1.77 paf 216: offset+=to_read;
217: return to_read;
218: }
219:
1.90.2.7 paf 220: override void seek(long value, int whence) {
1.79 paf 221: size_t new_offset;
222: switch(whence) {
223: case SEEK_CUR: new_offset=offset+value; break;
224: case SEEK_SET: new_offset=(size_t)value; break;
1.90.2.7 paf 225: default:
226: throw Exception(Exception::undefined_type,
227: Exception::undefined_source,
228: "whence #%d not supported", 0, whence);
229: break; // never
1.79 paf 230: }
231:
1.77 paf 232: if((ssize_t)new_offset<0 || new_offset>size)
1.88 paf 233: throw Exception("image.format",
1.90.2.7 paf 234: file_name,
1.79 paf 235: "seek(value=%l, whence=%d) failed: out of buffer, new_offset>size (%l>%l) or new_offset<0",
236: value, whence, new_offset, size);
1.77 paf 237: offset=new_offset;
238: }
239:
1.90.2.7 paf 240: override long tell() { return offset; }
1.79 paf 241:
1.1 paf 242: };
1.77 paf 243:
1.43 parser 244: #endif
1.1 paf 245:
1.72 paf 246: /// PNG file header
247: struct PNG_Header {
248: char dummy[12];
249: char signature[4]; //< must be "IHDR"
1.80 paf 250: uchar high_width[2]; //< image width high bytes [we ignore for now]
251: uchar width[2]; //< image width low bytes
252: uchar high_height[2]; //< image height high bytes [we ignore for now]
253: uchar height[4]; //< image height
1.72 paf 254: };
255:
1.21 paf 256: /// GIF file header
1.1 paf 257: struct GIF_Header {
1.72 paf 258: char signature[3]; // 'GIF'
1.1 paf 259: char version[3];
1.80 paf 260: uchar width[2];
261: uchar height[2];
1.1 paf 262: char dif;
263: char fonColor;
264: char nulls;
265: };
266:
1.31 parser 267: /// JPEG record head
268: struct JPG_Segment_head {
1.80 paf 269: uchar marker;
270: uchar code;
271: uchar length[2];
1.1 paf 272: };
1.21 paf 273: /// JPEG frame header
1.31 parser 274: struct JPG_Size_segment_body {
1.27 parser 275: char data; //< data precision of bits/sample
1.80 paf 276: uchar height[2]; //< image height
277: uchar width[2]; //< image width
1.27 parser 278: char numComponents; //< number of color components
1.1 paf 279: };
280:
1.79 paf 281: /// JPEG frame header
282: struct JPG_Exif_segment_start {
283: char signature[6]; // Exif\0\0
284: };
285:
1.80 paf 286: /// JPEG Exif TIFF Header
287: struct JPG_Exif_TIFF_header {
288: uchar byte_align_identifier[2];
289: char dummy[2]; // always 000A [or 0A00]
290: uchar first_IFD_offset[4]; // Usually the first IFD starts immediately next to TIFF header, so this offset has value '0x00000008'.
291: };
292:
293: // JPEG Exif IFD start
294: struct JPG_Exif_IFD_start {
295: uchar directory_entry_count[2]; // the number of directory entry contains in this IFD
296: };
297:
298: // TTTT ffff NNNNNNNN DDDDDDDD
299: struct JPG_Exif_IFD_entry {
300: uchar tag[2]; // Tag number, this shows a kind of data
301: uchar format[2]; // data format
302: uchar components_count[4]; // number of components
303: uchar value_or_offset_to_it[4]; // data value or offset to data value
304: };
305:
306: #define JPG_IFD_TAG_EXIF_OFFSET 0x8769
307:
1.89 paf 308: #define JPEG_EXIF_DATE_CHARS 20
309:
1.1 paf 310: //
311:
1.80 paf 312: inline ushort x_endian_to_ushort(uchar b0, uchar b1) {
313: return (ushort)((b1<<8) + b0);
1.33 parser 314: }
315:
1.80 paf 316: inline uint x_endian_to_uint(uchar b0, uchar b1, uchar b2, uchar b3) {
317: return (uint)(((((b3<<8) + b2)<<8)+b1)<<8)+b0;
1.33 parser 318: }
319:
1.80 paf 320: inline ushort endian_to_ushort(bool is_big, const uchar *b/* [2] */) {
321: return is_big?x_endian_to_ushort(b[1], b[0]):
322: x_endian_to_ushort(b[0], b[1]);
1.1 paf 323: }
324:
1.80 paf 325: inline uint endian_to_uint(bool is_big, const uchar *b /* [4] */) {
326: return is_big?x_endian_to_uint(b[3], b[2], b[1], b[0]):
327: x_endian_to_uint(b[0], b[1], b[2], b[3]);
328: }
329:
1.90.2.7 paf 330: static void measure_gif(Pool& pool, StringPtr origin_string,
1.78 paf 331: Measure_reader& reader, ushort& width, ushort& height) {
1.1 paf 332:
1.90.2.7 paf 333: const char *buf;
1.1 paf 334: const int head_size=sizeof(GIF_Header);
335: if(reader.read(buf, head_size)<head_size)
1.68 paf 336: throw Exception("image.format",
1.1 paf 337: origin_string,
1.34 parser 338: "not GIF file - too small");
1.31 parser 339: GIF_Header *head=(GIF_Header *)buf;
1.1 paf 340:
1.72 paf 341: if(strncmp(head->signature, "GIF", 3)!=0)
1.68 paf 342: throw Exception("image.format",
1.1 paf 343: origin_string,
1.44 parser 344: "not GIF file - wrong signature");
1.1 paf 345:
1.80 paf 346: width=endian_to_ushort(false, head->width);
347: height=endian_to_ushort(false, head->height);
348: }
349:
1.90.2.7 paf 350: static ValuePtr parse_IFD_entry_formatted_one_value(Pool& pool,
1.80 paf 351: bool is_big,
352: ushort format,
353: size_t component_size,
354: const uchar *value) {
355: switch(format) {
356: case 1: // unsigned byte
1.90.2.7 paf 357: return ValuePtr(new VInt((uchar)value[0]));
1.80 paf 358: case 3: // unsigned short
1.90.2.7 paf 359: return ValuePtr(new VInt(endian_to_ushort(is_big, value)));
1.80 paf 360: case 4: // unsigned long
361: // 'double' because parser's Int is signed
1.90.2.7 paf 362: return ValuePtr(new VDouble(endian_to_uint(is_big, value)));
1.80 paf 363: case 5: // unsigned rational
364: {
365: uint numerator=endian_to_uint(is_big, value); value+=component_size/2;
366: uint denominator=endian_to_uint(is_big, value);
367: if(!denominator)
1.90.2.7 paf 368: return ValuePtr(0);
369: return ValuePtr(new VDouble(((double)numerator)/denominator));
1.80 paf 370: }
371: case 6: // signed byte
1.90.2.7 paf 372: return ValuePtr(new VInt((signed char)value[0]));
1.80 paf 373: case 8: // signed short
1.90.2.7 paf 374: return ValuePtr(new VInt((signed short)endian_to_ushort(is_big, value)));
1.80 paf 375: case 9: // signed long
1.90.2.7 paf 376: return ValuePtr(new VInt((signed int)endian_to_uint(is_big, value)));
1.80 paf 377: case 10: // signed rational
378: {
379: signed int numerator=(signed int)endian_to_uint(is_big, value); value+=component_size/2;
380: uint denominator=endian_to_uint(is_big, value);
381: if(!denominator)
1.90.2.7 paf 382: return ValuePtr(0);
383: return ValuePtr(new VDouble(numerator/denominator));
1.80 paf 384: }
385: /*
386: case 11: // single float
387: todo
388: case 12: // double float
389: todo
390: */
391: };
392:
1.90.2.7 paf 393: return ValuePtr(0);
1.80 paf 394: }
395:
1.89 paf 396: // date.C
1.90.2.8 paf 397: time_t cstr_to_time_t(char *cstr, StringPtr report_error_origin);
1.89 paf 398:
1.90.2.7 paf 399: static ValuePtr parse_IFD_entry_formatted_value(Pool& pool,
1.80 paf 400: bool is_big, ushort format,
401: size_t component_size, uint components_count,
402: const uchar *value) {
403: if(format==2) { // ascii string, exception: the only type with varying size
1.90.2.3 paf 404: const char* cstr=(const char* )value;
1.80 paf 405: size_t size=components_count;
1.89 paf 406: // Data format is "YYYY:MM:DD HH:MM:SS"+0x00, total 20bytes
407: if(size==JPEG_EXIF_DATE_CHARS
408: && isdigit(cstr[0])
409: && cstr[JPEG_EXIF_DATE_CHARS-1]==0) {
410: char cstr_writable[JPEG_EXIF_DATE_CHARS];
411: strcpy(cstr_writable, cstr);
412:
1.90.2.8 paf 413: time_t t=cstr_to_time_t(cstr_writable,
414: StringPtr(0)/* do not throw exception, just return bad result */);
1.89 paf 415: if(t>=0)
1.90.2.7 paf 416: return ValuePtr(new VDate(t));
1.89 paf 417: }
418:
1.90.2.3 paf 419: if(const char* premature_zero_pos=(const char* )memchr(cstr, 0, size))
1.80 paf 420: size=premature_zero_pos-cstr;
1.90.2.7 paf 421: return ValuePtr(new VString(StringPtr(new String(cstr, size, true/*tainted*/))));
1.80 paf 422: }
423:
424: if(components_count==1)
425: return parse_IFD_entry_formatted_one_value(pool, is_big, format, component_size, value);
426:
1.90.2.7 paf 427: VHashPtr result(new VHash);
428: HashStringValue& hash=result->hash(Exception::undefined_source);
1.80 paf 429: for(uint i=0; i<components_count; i++, value+=component_size) {
1.90.2.7 paf 430: char *key_cstr=new(pool) char[MAX_NUMBER];
431: StringPtr skey(new String(key_cstr, snprintf(key_cstr, MAX_NUMBER, "%d", i)));
432: hash.put(skey,
433: parse_IFD_entry_formatted_one_value(pool, is_big, format, component_size, value));
1.80 paf 434: }
435:
1.90.2.7 paf 436: return result;
1.80 paf 437: }
438:
1.90.2.7 paf 439: static ValuePtr parse_IFD_entry_value(Pool& pool,
1.80 paf 440: bool is_big, Measure_reader& reader, long tiff_base,
441: JPG_Exif_IFD_entry& entry) {
442: size_t format2component_size[]={
443: 0, // undefined
444: 1, // unsigned byte
445: 1, // ascii string
446: 2, // unsigned short
447: 4, // unsigned long
448: 8, // unsigned rational
449: 1, // signed byte
450: 0, // undefined
451: 2, // signed short
452: 4, // signed long
453: 8, // signed rational
454: /*
455: 4, // single float
456: 8, // double float
457: */
458: };
459:
460: ushort format=endian_to_ushort(is_big, entry.format);
461: if(format>=sizeof(format2component_size)/sizeof(format2component_size[0]))
462: return 0; // format out of range, ignoring
463:
464: size_t component_size=format2component_size[format];
465: if(component_size==0)
466: return 0; // undefined format
467:
468: // You can get the total data byte length by multiplies
469: // a 'bytes/components' value (see above chart) by number of components stored 'NNNNNNNN' area
470: uint components_count=endian_to_uint(is_big, entry.components_count);
471: size_t value_size=component_size*components_count;
472: // If its size is over 4bytes, 'DDDDDDDD' contains the offset to data stored address
1.90.2.7 paf 473: ValuePtr result;
1.80 paf 474:
475: if(value_size<=4)
476: result=parse_IFD_entry_formatted_value(pool,
477: is_big, format,
478: component_size, components_count,
479: entry.value_or_offset_to_it);
480: else {
481: long remembered=reader.tell();
482: {
483: reader.seek(tiff_base+endian_to_uint(is_big, entry.value_or_offset_to_it), SEEK_SET);
1.90.2.7 paf 484: const char *value;
1.80 paf 485: if(reader.read(value, value_size)<sizeof(value_size))
486: return 0;
487: result=parse_IFD_entry_formatted_value(pool,
488: is_big, format,
489: component_size, components_count,
490: (const uchar*)value);
491: }
492: reader.seek(remembered, SEEK_SET);
493: }
494:
495: return result;
496: }
497:
498: static void parse_IFD(Pool& pool,
1.90.2.7 paf 499: HashStringValue& hash,
1.80 paf 500: bool is_big, Measure_reader& reader, long tiff_base);
501:
1.90.2.7 paf 502: static void parse_IFD_entry(Pool& pool, HashStringValue& hash,
1.80 paf 503: bool is_big, Measure_reader& reader, long tiff_base,
504: JPG_Exif_IFD_entry& entry) {
505: ushort tag=endian_to_ushort(is_big, entry.tag);
506: if(tag==JPG_IFD_TAG_EXIF_OFFSET) {
507: long remembered=reader.tell();
508: {
509: reader.seek(tiff_base+endian_to_uint(is_big, entry.value_or_offset_to_it), SEEK_SET);
510: parse_IFD(pool, hash, is_big, reader, tiff_base);
511: }
512: reader.seek(remembered, SEEK_SET);
513: return;
514: }
515:
1.90.2.7 paf 516: if(ValuePtr value=parse_IFD_entry_value(pool, is_big, reader, tiff_base, entry)) {
1.90.2.13 paf 517: if(const char* name=exif_tag_value2name.get(tag))
1.90.2.7 paf 518: hash.put(StringPtr(new String(name)), value);
1.90.2.13 paf 519: else {
520: StringPtr skey(new String(pool.format_integer(tag)));
1.80 paf 521: hash.put(skey, value);
1.90.2.13 paf 522: }
1.80 paf 523: }
1.1 paf 524: }
525:
1.80 paf 526: static void parse_IFD(Pool& pool,
1.90.2.7 paf 527: HashStringValue& hash,
1.80 paf 528: bool is_big, Measure_reader& reader, long tiff_base) {
1.90.2.7 paf 529: const char *buf;
1.80 paf 530: if(reader.read(buf, sizeof(JPG_Exif_IFD_start))<sizeof(JPG_Exif_IFD_start))
531: return;
532: JPG_Exif_IFD_start *start=(JPG_Exif_IFD_start *)buf;
533:
534: ushort directory_entry_count=endian_to_ushort(is_big, start->directory_entry_count);
535: for(int i=0; i<directory_entry_count; i++) {
536: if(reader.read(buf, sizeof(JPG_Exif_IFD_entry))<sizeof(JPG_Exif_IFD_entry))
537: return;
538:
539: parse_IFD_entry(pool, hash, is_big, reader, tiff_base, *(JPG_Exif_IFD_entry *)buf);
540: }
541: // then goes: LLLLLLLL Offset to next IFD [not going there]
542: }
543:
1.90.2.7 paf 544: static ValuePtr parse_exif(Pool& pool,
1.80 paf 545: Measure_reader& reader,
1.90.2.7 paf 546: StringPtr origin_string) {
547: const char *buf;
1.80 paf 548: if(reader.read(buf, sizeof(JPG_Exif_segment_start))<sizeof(JPG_Exif_segment_start))
549: throw Exception("image.format",
550: origin_string,
551: "not JPEG file - can not fully read Exif segment start");
552:
553: JPG_Exif_segment_start *start=(JPG_Exif_segment_start *)buf;
554: if(memcmp(start->signature, "Exif\0\0", 4+2)!=0) //signature invalid?
555: return 0; // ignore invalid block
556:
557: uint tiff_base=reader.tell();
558: if(reader.read(buf, sizeof(JPG_Exif_TIFF_header))<sizeof(JPG_Exif_TIFF_header))
559: return 0;
560:
561: JPG_Exif_TIFF_header *head=(JPG_Exif_TIFF_header *)buf;
562: bool is_big=head->byte_align_identifier[0]=='M'; // [M]otorola vs [I]ntel
563:
564: uint first_IFD_offset=endian_to_uint(is_big, head->first_IFD_offset);
565: reader.seek(tiff_base+first_IFD_offset, SEEK_SET);
566:
1.90.2.7 paf 567: VHashPtr vhash(new VHash);
1.80 paf 568:
569: // IFD
1.90.2.7 paf 570: parse_IFD(pool, vhash->hash(Exception::undefined_source), is_big, reader, tiff_base);
1.80 paf 571:
1.90.2.7 paf 572: return vhash;
1.80 paf 573: }
574:
1.90.2.7 paf 575: static void measure_jpeg(Pool& pool, StringPtr origin_string,
576: Measure_reader& reader, ushort& width, ushort& height, ValuePtr* exif) {
1.2 paf 577: // JFIF format markers
1.80 paf 578: const uchar MARKER=0xFF;
579: const uchar CODE_SIZE_A=0xC0;
580: const uchar CODE_SIZE_B=0xC1;
581: const uchar CODE_SIZE_C=0xC2;
582: const uchar CODE_SIZE_D=0xC3;
583: const uchar CODE_EXIF=0xE1;
1.2 paf 584:
1.90.2.7 paf 585: const char *buf;
1.18 paf 586: const size_t prefix_size=2;
1.31 parser 587: if(reader.read(buf, prefix_size)<prefix_size)
1.68 paf 588: throw Exception("image.format",
1.1 paf 589: origin_string,
1.34 parser 590: "not JPEG file - too small");
1.80 paf 591: uchar *signature=(uchar *)buf;
1.1 paf 592:
1.31 parser 593: if(!(signature[0]==0xFF && signature[1]==0xD8))
1.68 paf 594: throw Exception("image.format",
1.1 paf 595: origin_string,
1.44 parser 596: "not JPEG file - wrong signature");
1.31 parser 597:
598: while(true) {
1.80 paf 599: uint segment_base=reader.tell()+2/*marker,code*/;
1.31 parser 600: if(reader.read(buf, sizeof(JPG_Segment_head))<sizeof(JPG_Segment_head))
1.79 paf 601: break;
1.31 parser 602: JPG_Segment_head *head=(JPG_Segment_head *)buf;
603:
604: // Verify that it's a valid segment.
605: if(head->marker!=MARKER)
1.79 paf 606: throw Exception("image.format",
607: origin_string,
608: "not JPEG file - marker not found");
609:
610: switch(head->code) {
611: // http://www.ba.wakwak.com/~tsuruzoh/Computer/Digicams/exif-e.html
612: case CODE_EXIF:
1.80 paf 613: if(exif && !*exif) // seen .jpg with some xml under EXIF tag, after real exif block :)
614: *exif=parse_exif(pool, reader, origin_string);
1.1 paf 615: break;
1.31 parser 616:
1.79 paf 617: case CODE_SIZE_A:
618: case CODE_SIZE_B:
619: case CODE_SIZE_C:
620: case CODE_SIZE_D:
621: {
622: // Segments that contain size info
623: if(reader.read(buf, sizeof(JPG_Size_segment_body))<sizeof(JPG_Size_segment_body))
624: throw Exception("image.format",
625: origin_string,
626: "not JPEG file - can not fully read Size segment");
627: JPG_Size_segment_body *body=(JPG_Size_segment_body *)buf;
628:
1.80 paf 629: width=endian_to_ushort(true, body->width);
630: height=endian_to_ushort(true, body->height);
1.79 paf 631: }
1.80 paf 632: return;
1.79 paf 633: };
634:
1.80 paf 635: reader.seek(segment_base+endian_to_ushort(true, head->length), SEEK_SET);
1.31 parser 636: }
637:
1.79 paf 638: throw Exception("image.format",
639: origin_string,
640: "broken JPEG file - size frame not found");
1.1 paf 641: }
642:
1.90.2.7 paf 643: static void measure_png(Pool& pool, StringPtr origin_string,
1.78 paf 644: Measure_reader& reader, ushort& width, ushort& height) {
1.72 paf 645:
1.90.2.7 paf 646: const char *buf;
1.72 paf 647: const int head_size=sizeof(PNG_Header);
648: if(reader.read(buf, head_size)<head_size)
649: throw Exception("image.format",
650: origin_string,
651: "not PNG file - too small");
652: PNG_Header *head=(PNG_Header *)buf;
653:
654: if(strncmp(head->signature, "IHDR", 4)!=0)
655: throw Exception("image.format",
656: origin_string,
657: "not PNG file - wrong signature");
658:
1.80 paf 659: width=endian_to_ushort(true, head->width);
660: height=endian_to_ushort(true, head->height);
1.72 paf 661: }
662:
1.1 paf 663: // measure center
664:
1.90.2.7 paf 665: static void measure(Pool& pool, StringPtr file_name,
666: Measure_reader& reader, ushort& width, ushort& height, ValuePtr* exif) {
667: CharPtr file_name_cstr=file_name->cstr(String::UL_FILE_SPEC);
668: if(const char* cext=strrchr(file_name_cstr, '.')) {
1.1 paf 669: cext++;
670: if(strcasecmp(cext, "GIF")==0)
1.90.2.7 paf 671: measure_gif(pool, file_name, reader, width, height);
1.1 paf 672: else if(strcasecmp(cext, "JPG")==0 || strcasecmp(cext, "JPEG")==0)
1.90.2.7 paf 673: measure_jpeg(pool, file_name, reader, width, height, exif);
1.72 paf 674: else if(strcasecmp(cext, "PNG")==0)
1.90.2.7 paf 675: measure_png(pool, file_name, reader, width, height);
1.1 paf 676: else
1.68 paf 677: throw Exception("image.format",
1.90.2.7 paf 678: file_name,
1.1 paf 679: "unhandled image file name extension '%s'", cext);
680: } else
1.68 paf 681: throw Exception("image.format",
1.90.2.7 paf 682: file_name,
1.1 paf 683: "can not determine image type - no file name extension");
684: }
685:
1.77 paf 686: // methods
1.1 paf 687:
1.40 parser 688: #ifndef DOXYGEN
1.77 paf 689: struct File_measure_action_info {
1.90.2.7 paf 690: ushort* width;
691: ushort* height;
692: ValuePtr* exif;
693: StringPtr file_name;
1.1 paf 694: };
1.40 parser 695: #endif
1.77 paf 696: static void file_measure_action(Pool& pool,
1.80 paf 697: struct stat& finfo, int f,
1.90.2.7 paf 698: StringPtr file_spec, const char* fname, bool as_text,
1.77 paf 699: void *context) {
700: File_measure_action_info& info=*static_cast<File_measure_action_info *>(context);
1.1 paf 701:
1.90.2.7 paf 702: Measure_file_reader reader(pool, f, info.file_name, fname);
703: measure(pool, info.file_name, reader, *info.width, *info.height, info.exif);
1.1 paf 704: }
705:
1.90.2.10 paf 706: static void _measure(Request& r, StringPtr method_name, MethodParams* params) {
1.1 paf 707: Pool& pool=r.pool();
708:
1.90.2.10 paf 709: ValuePtr data=params->as_no_junction(0, "data must not be code");
1.1 paf 710:
1.78 paf 711: ushort width=0;
712: ushort height=0;
1.90.2.7 paf 713: ValuePtr exif(0);
714: StringPtr file_name;
715: if(file_name=data->get_string(&pool)) {
716: File_measure_action_info info;
717: info.width=&width;
718: info.height=&height;
719: info.exif=&exif;
720: info.file_name=file_name;
721: file_read_action_under_lock(pool, r.absolute(file_name),
1.77 paf 722: "measure", file_measure_action, &info);
1.1 paf 723: } else {
1.90.2.7 paf 724: VFilePtr vfile=data->as_vfile(pool);
725: file_name=vfile->fields().get(name_name)->as_string(&pool);
1.77 paf 726: Measure_buf_reader reader(
1.90.2.7 paf 727: vfile->value_ptr(),
728: vfile->value_size(),
729: file_name
1.77 paf 730: );
1.90.2.7 paf 731: measure(pool, file_name, reader, width, height, &exif);
1.1 paf 732: }
733:
1.90.2.7 paf 734: GET_SELF(r, VImage).set(file_name, width, height, gdImagePtr(0), exif);
1.1 paf 735: }
736:
1.40 parser 737: #ifndef DOXYGEN
1.4 paf 738: struct Attrib_info {
1.90.2.7 paf 739: Pool* pool;
740: String* tag; ///< html tag being constructed
741: HashStringValue* skip; ///< tag attributes not to append to tag string [to skip]
1.4 paf 742: };
1.40 parser 743: #endif
1.90.2.7 paf 744: static void append_attrib_pair(
745: HashStringValue::key_type key,
746: HashStringValue::value_type value,
747: Attrib_info* info) {
1.49 parser 748: // skip user-specified and internal(starting with "line-") attributes
1.90.2.7 paf 749: if(info->skip && info->skip->get(key) || key->pos("line-")==0)
1.4 paf 750: return;
751:
1.3 paf 752: // src="a.gif" width=123 ismap[=-1]
1.90.2.7 paf 753: *info->tag << " " << key;
754: if(value->is_string() || value->as_int()>=0)
755: *info->tag << "=\"" << value->as_string(info->pool) << "\"";
1.3 paf 756: }
1.90.2.10 paf 757: static void _html(Request& r, StringPtr method_name, MethodParams* params) {
1.3 paf 758: Pool& pool=r.pool();
759:
1.90.2.7 paf 760: String tag;
1.3 paf 761: tag << "<img";
1.4 paf 762:
1.90.2.7 paf 763: const HashStringValue& fields=GET_SELF(r, VImage).fields();
764: HashStringValue* attribs=0;
1.4 paf 765:
1.90.2.10 paf 766: if(params->count()) {
1.69 paf 767: // for backward compatibility: someday was ^html{}
1.90.2.10 paf 768: ValuePtr vattribs=r.process_to_value(params->get(0),
1.70 paf 769: /*0/*no name* /,*/
1.52 parser 770: false/*don't intercept string*/);
1.90.2.7 paf 771: if(!vattribs->is_string()) // allow empty
772: if(attribs=vattribs->get_hash(method_name)) {
773: Attrib_info info={&pool, &tag};
774: attribs->for_each(append_attrib_pair, &info);
1.39 parser 775: } else
1.68 paf 776: throw Exception("parser.runtime",
1.90.2.6 paf 777: method_name,
1.39 parser 778: "attributes must be hash");
779: }
1.4 paf 780:
1.90.2.7 paf 781: {
782: Attrib_info info={&pool, &tag, attribs};
783: fields.for_each(append_attrib_pair, &info);
784: }
1.6 paf 785: tag << " />";
1.3 paf 786: r.write_pass_lang(tag);
787: }
1.8 paf 788:
1.68 paf 789: /// @test wrap FILE to auto-object
1.90.2.7 paf 790: static gdImagePtr load(Request& r, StringPtr method_name,
791: StringPtr file_name){
1.16 paf 792: Pool& pool=r.pool();
793:
1.90.2.7 paf 794: CharPtr file_name_cstr=r.absolute(file_name)->cstr(String::UL_FILE_SPEC);
1.16 paf 795: if(FILE *f=fopen(file_name_cstr, "rb")) {
1.90.2.7 paf 796: gdImagePtr image(new gdImage);
797: bool ok=image->CreateFromGif(f);
1.16 paf 798: fclose(f);
1.23 paf 799: if(!ok)
1.68 paf 800: throw Exception("image.format",
1.90.2.7 paf 801: file_name,
1.23 paf 802: "is not in GIF format");
1.90.2.7 paf 803: return image;
1.16 paf 804: } else {
1.68 paf 805: throw Exception("file.missing",
1.90.2.6 paf 806: method_name,
1.90.2.14! paf 807: "can not open '%s'", file_name_cstr.get());
1.90.2.7 paf 808: return gdImagePtr(0);
1.16 paf 809: }
810: }
811:
812:
1.90.2.10 paf 813: static void _load(Request& r, StringPtr method_name, MethodParams* params) {
1.6 paf 814: Pool& pool=r.pool();
815:
1.90.2.10 paf 816: StringPtr file_name=params->as_string(0, "file name must not be code");
1.6 paf 817:
1.90.2.7 paf 818: gdImagePtr image=load(r, method_name, file_name);
819: GET_SELF(r, VImage).set(file_name, image->SX(), image->SY(), image);
1.6 paf 820: }
821:
1.90.2.10 paf 822: static void _create(Request& r, StringPtr method_name, MethodParams* params) {
1.6 paf 823: Pool& pool=r.pool();
824:
1.90.2.10 paf 825: int width=params->as_int(0, "width must be int", r);
826: int height=params->as_int(1, "height must be int", r);
1.8 paf 827: int bgcolor_value=0xffFFff;
1.90.2.10 paf 828: if(params->count()>2)
829: bgcolor_value=params->as_int(2, "color must be int", r);
1.90.2.7 paf 830: gdImagePtr image(new gdImage);
831: image->Create(width, height);
832: image->FilledRectangle(0, 0, width-1, height-1, image->Color(bgcolor_value));
833: GET_SELF(r, VImage).set(StringPtr(0), width, height, image);
1.6 paf 834: }
835:
1.90.2.10 paf 836: static void _gif(Request& r, StringPtr method_name, MethodParams* params) {
1.6 paf 837: Pool& pool=r.pool();
838:
1.90.2.7 paf 839: gdImagePtr image=GET_SELF(r, VImage).image;
1.8 paf 840: if(!image)
1.68 paf 841: throw Exception(0,
1.90.2.6 paf 842: method_name,
1.12 paf 843: "does not contain an image");
1.6 paf 844:
845: // could _ but don't thing it's wise to use $image.src for vfile.name
1.10 paf 846:
1.90.2.7 paf 847: String out; image->Gif(pool, out);
1.6 paf 848:
1.90.2.7 paf 849: VFilePtr vfile(new VFile);
850: ValuePtr content_type(new VString(StringPtr(new String("image/gif"))));
851: vfile->set(pool, false/*not tainted*/,
1.90.2.11 paf 852: out.cstr(pool), out.size(), 0, content_type);
1.6 paf 853:
854: r.write_no_lang(vfile);
855: }
856:
1.90.2.10 paf 857: static void _line(Request& r, StringPtr method_name, MethodParams* params) {
1.12 paf 858: Pool& pool=r.pool();
859:
1.90.2.7 paf 860: gdImagePtr image=GET_SELF(r, VImage).image;
1.12 paf 861: if(!image)
1.68 paf 862: throw Exception(0,
1.90.2.6 paf 863: method_name,
1.12 paf 864: "does not contain an image");
865:
866: image->Line(
1.90.2.10 paf 867: params->as_int(0, "x0 must be int", r),
868: params->as_int(1, "y0 must be int", r),
869: params->as_int(2, "x1 must be int", r),
870: params->as_int(3, "y1 must be int", r),
871: image->Color(params->as_int(4, "color must be int", r)));
1.13 paf 872: }
873:
1.90.2.10 paf 874: static void _fill(Request& r, StringPtr method_name, MethodParams* params) {
1.13 paf 875: Pool& pool=r.pool();
876:
1.90.2.7 paf 877: gdImagePtr image=GET_SELF(r, VImage).image;
1.13 paf 878: if(!image)
1.68 paf 879: throw Exception(0,
1.90.2.6 paf 880: method_name,
1.13 paf 881: "does not contain an image");
1.12 paf 882:
1.13 paf 883: image->Fill(
1.90.2.10 paf 884: params->as_int(0, "x must be int", r),
885: params->as_int(1, "y must be int", r),
886: image->Color(params->as_int(2, "color must be int", r)));
1.13 paf 887: }
888:
1.90.2.10 paf 889: static void _rectangle(Request& r, StringPtr method_name, MethodParams* params) {
1.13 paf 890: Pool& pool=r.pool();
891:
1.90.2.7 paf 892: gdImagePtr image=GET_SELF(r, VImage).image;
1.13 paf 893: if(!image)
1.68 paf 894: throw Exception(0,
1.90.2.6 paf 895: method_name,
1.13 paf 896: "does not contain an image");
897:
898: image->Rectangle(
1.90.2.10 paf 899: params->as_int(0, "x0 must be int", r),
900: params->as_int(1, "y0 must be int", r),
901: params->as_int(2, "x1 must be int", r),
902: params->as_int(3, "y1 must be int", r),
903: image->Color(params->as_int(4, "color must be int", r)));
1.13 paf 904: }
905:
1.90.2.10 paf 906: static void _bar(Request& r, StringPtr method_name, MethodParams* params) {
1.13 paf 907: Pool& pool=r.pool();
908:
1.90.2.7 paf 909: gdImagePtr image=GET_SELF(r, VImage).image;
1.13 paf 910: if(!image)
1.68 paf 911: throw Exception(0,
1.90.2.6 paf 912: method_name,
1.13 paf 913: "does not contain an image");
914:
915: image->FilledRectangle(
1.90.2.10 paf 916: params->as_int(0, "x0 must be int", r),
917: params->as_int(1, "y0 must be int", r),
918: params->as_int(2, "x1 must be int", r),
919: params->as_int(3, "y1 must be int", r),
920: image->Color(params->as_int(4, "color must be int", r)));
1.13 paf 921: }
922:
1.44 parser 923: #ifndef DOXYGEN
1.90.2.7 paf 924: static void add_point(Table::element_type row,
925: gdImage::Point **p) {
926: (**p).x=row->get(0)->as_int();
927: (**p).y=row->get(1)->as_int();
1.44 parser 928: (*p)++;
929: }
930: #endif
1.90.2.10 paf 931: static void _replace(Request& r, StringPtr method_name, MethodParams* params) {
1.13 paf 932: Pool& pool=r.pool();
933:
1.90.2.7 paf 934: gdImagePtr image=GET_SELF(r, VImage).image;
1.13 paf 935: if(!image)
1.68 paf 936: throw Exception(0,
1.90.2.6 paf 937: method_name,
1.13 paf 938: "does not contain an image");
939:
1.90.2.10 paf 940: Table* table=params->as_no_junction(2, "coordinates must not be code")->get_table();
1.44 parser 941: if(!table)
1.68 paf 942: throw Exception(0,
1.90.2.6 paf 943: method_name,
1.44 parser 944: "coordinates must be table");
1.13 paf 945:
1.90.2.7 paf 946: gdImage::Point *all_p=new(pool) gdImage::Point[table->count()];
1.44 parser 947: gdImage::Point *add_p=all_p;
948: table->for_each(add_point, &add_p);
1.90.2.7 paf 949: image->FilledPolygonReplaceColor(all_p, table->count(),
1.90.2.10 paf 950: image->Color(params->as_int(0, "src color must be int", r)),
951: image->Color(params->as_int(1, "dest color must be int", r)));
1.13 paf 952: }
953:
1.90.2.10 paf 954: static void _polyline(Request& r, StringPtr method_name, MethodParams* params) {
1.13 paf 955: Pool& pool=r.pool();
956:
1.90.2.7 paf 957: gdImagePtr image=GET_SELF(r, VImage).image;
1.13 paf 958: if(!image)
1.68 paf 959: throw Exception(0,
1.90.2.6 paf 960: method_name,
1.13 paf 961: "does not contain an image");
962:
1.90.2.10 paf 963: Table* table=params->as_no_junction(1, "coordinates must not be code")->get_table();
1.44 parser 964: if(!table)
1.68 paf 965: throw Exception(0,
1.90.2.6 paf 966: method_name,
1.44 parser 967: "coordinates must be table");
968:
1.90.2.7 paf 969: gdImage::Point* all_p=new(pool) gdImage::Point[table->count()];
1.44 parser 970: gdImage::Point *add_p=all_p;
971: table->for_each(add_point, &add_p);
1.90.2.7 paf 972: image->Polygon(all_p, table->count(),
1.90.2.10 paf 973: image->Color(params->as_int(0, "color must be int", r)),
1.44 parser 974: false/*not closed*/);
975: }
976:
1.90.2.10 paf 977: static void _polygon(Request& r, StringPtr method_name, MethodParams* params) {
1.44 parser 978: Pool& pool=r.pool();
979:
1.90.2.7 paf 980: gdImagePtr image=GET_SELF(r, VImage).image;
1.44 parser 981: if(!image)
1.68 paf 982: throw Exception(0,
1.90.2.6 paf 983: method_name,
1.44 parser 984: "does not contain an image");
1.13 paf 985:
1.90.2.10 paf 986: Table* table=params->as_no_junction(1, "coordinates must not be code")->get_table();
1.44 parser 987: if(!table)
1.68 paf 988: throw Exception(0,
1.90.2.6 paf 989: method_name,
1.44 parser 990: "coordinates must be table");
991:
1.90.2.7 paf 992: gdImage::Point* all_p=new(pool) gdImage::Point[table->count()];
1.44 parser 993: gdImage::Point *add_p=all_p;
994: table->for_each(add_point, &add_p);
1.90.2.7 paf 995: image->Polygon(all_p, table->count(),
1.90.2.10 paf 996: image->Color(params->as_int(0, "color must be int", r)));
1.13 paf 997: }
998:
1.90.2.10 paf 999: static void _polybar(Request& r, StringPtr method_name, MethodParams* params) {
1.13 paf 1000: Pool& pool=r.pool();
1001:
1.90.2.7 paf 1002: gdImagePtr image=GET_SELF(r, VImage).image;
1.13 paf 1003: if(!image)
1.68 paf 1004: throw Exception(0,
1.90.2.6 paf 1005: method_name,
1.13 paf 1006: "does not contain an image");
1007:
1.90.2.10 paf 1008: Table* table=params->as_no_junction(1, "coordinates must not be code")->get_table();
1.44 parser 1009: if(!table)
1.68 paf 1010: throw Exception("parser.runtime",
1.90.2.6 paf 1011: method_name,
1.44 parser 1012: "coordinates must be table");
1.13 paf 1013:
1.90.2.7 paf 1014: gdImage::Point* all_p=new(pool) gdImage::Point[table->count()];
1.44 parser 1015: gdImage::Point *add_p=all_p;
1016: table->for_each(add_point, &add_p);
1.90.2.7 paf 1017: image->FilledPolygon(all_p, table->count(),
1.90.2.10 paf 1018: image->Color(params->as_int(0, "color must be int", r)));
1.12 paf 1019: }
1020:
1.16 paf 1021: // font
1022:
1.85 paf 1023: #define Y(y)(y+index*height)
1.21 paf 1024:
1025: /// simple gdImage-based font storage & text output
1.90.2.7 paf 1026: class Font: public PA_Object {
1.16 paf 1027: public:
1028:
1.38 parser 1029: const static int letter_spacing;
1.35 parser 1030: int height; ///< Font heigth
1031: int monospace; ///< Default char width
1032: int spacebarspace; ///< spacebar width
1.90.2.7 paf 1033: gdImagePtr ifont;
1034: StringPtr alphabet;
1.16 paf 1035:
1.90.2.7 paf 1036: Font(//Pool& pool,
1037: StringPtr aalphabet,
1038: gdImagePtr aifont, int aheight, int amonospace, int aspacebarspace):
1.16 paf 1039: alphabet(aalphabet),
1.35 parser 1040: height(aheight), monospace(amonospace), spacebarspace(aspacebarspace),
1.16 paf 1041: ifont(aifont) {
1042: }
1043:
1044: /* ******************************** char ********************************** */
1045:
1046: int index_of(char ch) {
1047: if(ch==' ') return -1;
1.90.2.7 paf 1048: return alphabet->pos(&ch, 1);
1.16 paf 1049: }
1050:
1051: int index_width(int index) {
1052: if(index<0)
1.35 parser 1053: return spacebarspace;
1.90.2.7 paf 1054: int tr=ifont->GetTransparent();
1055: for(int x=ifont->SX()-1; x>=0; x--) {
1.86 paf 1056: for(int y=0; y<height; y++)
1.90.2.7 paf 1057: if(ifont->GetPixel(x, Y(y))!=tr)
1.35 parser 1058: return x+1;
1.16 paf 1059: }
1060: return 0;
1061: }
1062:
1.90.2.7 paf 1063: void index_display(gdImagePtr image, int x, int y, int index){
1.16 paf 1064: if(index>=0)
1.90.2.7 paf 1065: ifont->Copy(*image, x, y, 0, Y(0), index_width(index), height);
1.16 paf 1066: }
1067:
1068: /* ******************************** string ********************************** */
1.47 parser 1069:
1.87 paf 1070: int step_width(int index) {
1071: return letter_spacing + (monospace ? monospace : index_width(index));
1072: }
1073:
1074: // counts trailing letter_spacing, consider this OK. useful for contiuations
1.90.2.7 paf 1075: int string_width(StringPtr s){
1.90.2.11 paf 1076: CharPtr cstr=s->cstr();
1.16 paf 1077: int result=0;
1.90.2.11 paf 1078: for(const char* current=cstr; *current; current++)
1079: result+=step_width(index_of(*current));
1.16 paf 1080: return result;
1081: }
1082:
1.90.2.7 paf 1083: void string_display(gdImagePtr image, int x, int y, StringPtr s){
1.90.2.11 paf 1084: CharPtr cstr=s->cstr();
1085: for(const char* current=cstr; *current; current++) {
1086: int index=index_of(*current);
1.16 paf 1087: index_display(image, x, y, index);
1.87 paf 1088: x+=step_width(index);
1.16 paf 1089: }
1090: }
1091:
1092: };
1.38 parser 1093: const int Font::letter_spacing=1;
1.35 parser 1094:
1.90.2.10 paf 1095: static void _font(Request& r, StringPtr method_name, MethodParams* params) {
1.16 paf 1096: Pool& pool=r.pool();
1097:
1.90.2.10 paf 1098: StringPtr alphabet=params->as_string(0, "alphabet must not be code");
1099: gdImagePtr image=load(r, method_name, params->as_string(1, "file_name must not be code"));
1100: int spacebar_width=params->as_int(2, "spacebar_width must be int", r);
1.37 parser 1101: int monospace_width;
1.90.2.10 paf 1102: if(params->count()>3) {
1103: monospace_width=params->as_int(3, "monospace_width must be int", r);
1.37 parser 1104: if(!monospace_width)
1.90.2.7 paf 1105: monospace_width=image->SX();
1.37 parser 1106: } else
1107: monospace_width=0;
1.16 paf 1108:
1.90.2.7 paf 1109: if(!alphabet->size())
1.68 paf 1110: throw Exception("parser.runtime",
1.90.2.6 paf 1111: method_name,
1.37 parser 1112: "alphabet must not be empty");
1.84 paf 1113:
1.90.2.7 paf 1114: if(int remainder=image->SY() % alphabet->size())
1.84 paf 1115: throw Exception("parser.runtime",
1.90.2.6 paf 1116: method_name,
1.84 paf 1117: "font-file height(%d) not divisable by alphabet size(%d), remainder=%d",
1.90.2.7 paf 1118: image->SY(), alphabet->size(), remainder);
1.37 parser 1119:
1.90.2.7 paf 1120: GET_SELF(r, VImage).font=FontPtr(new Font(//pool,
1.37 parser 1121: alphabet,
1.36 parser 1122: image,
1.90.2.7 paf 1123: image->SY() / alphabet->size(), monospace_width, spacebar_width));
1.16 paf 1124: }
1125:
1.90.2.10 paf 1126: static void _text(Request& r, StringPtr method_name, MethodParams* params) {
1.16 paf 1127: Pool& pool=r.pool();
1128:
1.90.2.10 paf 1129: int x=params->as_int(0, "x must be int", r);
1130: int y=params->as_int(1, "y must be int", r);
1131: StringPtr s=params->as_string(2, "text must not be code");
1.16 paf 1132:
1.90.2.7 paf 1133: VImage& vimage=GET_SELF(r, VImage);
1.16 paf 1134: if(vimage.image)
1135: if(vimage.font)
1.90.2.7 paf 1136: vimage.font->string_display(vimage.image, x, y, s);
1.16 paf 1137: else
1.68 paf 1138: throw Exception("parser.runtime",
1.90.2.6 paf 1139: method_name,
1.16 paf 1140: "set the font first");
1141: else
1.68 paf 1142: throw Exception(0,
1.90.2.6 paf 1143: method_name,
1.16 paf 1144: "does not contain an image");
1145: }
1146:
1.90.2.10 paf 1147: static void _length(Request& r, StringPtr method_name, MethodParams* params) {
1.47 parser 1148: Pool& pool=r.pool();
1149:
1.90.2.10 paf 1150: const StringPtr s=params->as_string(0, "text must not be code");
1.47 parser 1151:
1.90.2.7 paf 1152: VImage& vimage=GET_SELF(r, VImage);
1.47 parser 1153: if(vimage.image)
1154: if(vimage.font) {
1.90.2.7 paf 1155: r.write_no_lang(ValuePtr(new VInt(vimage.font->string_width(s))));
1.47 parser 1156: } else
1.68 paf 1157: throw Exception("parser.runtime",
1.90.2.6 paf 1158: method_name,
1.47 parser 1159: "set the font first");
1160: else
1.68 paf 1161: throw Exception(0,
1.90.2.6 paf 1162: method_name,
1.47 parser 1163: "does not contain an image");
1164: }
1165:
1.90.2.10 paf 1166: static void _arc(Request& r, StringPtr method_name, MethodParams* params) {
1.48 parser 1167: Pool& pool=r.pool();
1168:
1.90.2.7 paf 1169: gdImagePtr image=GET_SELF(r, VImage).image;
1.48 parser 1170: if(!image)
1.68 paf 1171: throw Exception(0,
1.90.2.6 paf 1172: method_name,
1.48 parser 1173: "does not contain an image");
1174:
1175: image->Arc(
1.90.2.10 paf 1176: params->as_int(0, "center_x must be int", r),
1177: params->as_int(1, "center_y must be int", r),
1178: params->as_int(2, "width must be int", r),
1179: params->as_int(3, "height must be int", r),
1180: params->as_int(4, "start degrees must be int", r),
1181: params->as_int(5, "end degrees must be int", r),
1182: image->Color(params->as_int(6, "cx must be int", r)));
1.48 parser 1183: }
1184:
1.90.2.10 paf 1185: static void _sector(Request& r, StringPtr method_name, MethodParams* params) {
1.49 parser 1186: Pool& pool=r.pool();
1187:
1.90.2.7 paf 1188: gdImagePtr image=GET_SELF(r, VImage).image;
1.49 parser 1189: if(!image)
1.68 paf 1190: throw Exception(0,
1.90.2.6 paf 1191: method_name,
1.49 parser 1192: "does not contain an image");
1193:
1194: image->Sector(
1.90.2.10 paf 1195: params->as_int(0, "center_x must be int", r),
1196: params->as_int(1, "center_y must be int", r),
1197: params->as_int(2, "width must be int", r),
1198: params->as_int(3, "height must be int", r),
1199: params->as_int(4, "start degrees must be int", r),
1200: params->as_int(5, "end degrees must be int", r),
1201: image->Color(params->as_int(6, "color must be int", r)));
1.49 parser 1202: }
1203:
1.90.2.10 paf 1204: static void _circle(Request& r, StringPtr method_name, MethodParams* params) {
1.48 parser 1205: Pool& pool=r.pool();
1206:
1.90.2.7 paf 1207: gdImagePtr image=GET_SELF(r, VImage).image;
1.48 parser 1208: if(!image)
1.68 paf 1209: throw Exception(0,
1.90.2.6 paf 1210: method_name,
1.48 parser 1211: "does not contain an image");
1212:
1.90.2.10 paf 1213: int size=params->as_int(2, "radius must be int", r)*2;
1.48 parser 1214: image->Arc(
1.90.2.10 paf 1215: params->as_int(0, "center_x must be int", r),
1216: params->as_int(1, "center_y must be int", r),
1.50 parser 1217: size, //w
1218: size, //h
1.48 parser 1219: 0, //s
1220: 360, //e
1.90.2.10 paf 1221: image->Color(params->as_int(3, "color must be int", r)));
1.48 parser 1222: }
1223:
1.90.2.10 paf 1224: gdImagePtr as_image(Pool& pool, StringPtr method_name, MethodParams* params,
1.90.2.3 paf 1225: int index, const char* msg) {
1.90.2.7 paf 1226: gdImagePtr src(0);
1.75 paf 1227:
1.90.2.10 paf 1228: ValuePtr value=params->as_no_junction(index, msg);
1.53 parser 1229:
1.90.2.7 paf 1230: if(Value* vimage=value->as(VIMAGE_TYPE, false)) {
1.75 paf 1231: src=static_cast<VImage *>(vimage)->image;
1232: if(!src)
1233: throw Exception("parser.runtime",
1.90.2.6 paf 1234: method_name,
1.75 paf 1235: msg);
1236: } else
1.68 paf 1237: throw Exception("parser.runtime",
1.90.2.6 paf 1238: method_name,
1.53 parser 1239: msg);
1240:
1.90.2.7 paf 1241: return src;
1.53 parser 1242: }
1243:
1.90.2.10 paf 1244: static void _copy(Request& r, StringPtr method_name, MethodParams* params) {
1.53 parser 1245: Pool& pool=r.pool();
1246:
1.90.2.7 paf 1247: gdImagePtr dest=GET_SELF(r, VImage).image;
1.53 parser 1248: if(!dest)
1.68 paf 1249: throw Exception(0,
1.90.2.6 paf 1250: method_name,
1.53 parser 1251: "self does not contain an image");
1252:
1.90.2.7 paf 1253: gdImagePtr src=as_image(pool, method_name, params, 0, "src must be image");
1.53 parser 1254:
1.90.2.10 paf 1255: int sx=params->as_int(1, "src_x must be int", r);
1256: int sy=params->as_int(2, "src_y must be int", r);
1257: int sw=params->as_int(3, "src_w must be int", r);
1258: int sh=params->as_int(4, "src_h must be int", r);
1259: int dx=params->as_int(5, "dest_x must be int", r);
1260: int dy=params->as_int(6, "dest_y must be int", r);
1261: if(params->count()>1+2+2+2) {
1262: int dw=params->as_int(1+2+2+2, "dest_w must be int", r);
1263: int dh=(int)(params->count()>1+2+2+2+1?
1264: params->as_int(1+2+2+2+1, "dest_h must be int", r):sh*(((double)dw)/((double)sw)));
1265: int tolerance=params->count()>1+2+2+2+2?
1266: params->as_int(1+2+2+2+2, "tolerance must be int", r):150;
1.53 parser 1267:
1.90.2.7 paf 1268: src->CopyResampled(*dest, dx, dy, sx, sy, dw, dh, sw, sh, tolerance);
1.53 parser 1269: } else
1.90.2.7 paf 1270: src->Copy(*dest, dx, dy, sx, sy, sw, sh);
1.53 parser 1271: }
1272:
1273:
1.22 paf 1274: // constructor
1275:
1.90.2.7 paf 1276: MImage::MImage(): Methoded("image") {
1.1 paf 1277: // ^image:measure[DATA]
1.22 paf 1278: add_native_method("measure", Method::CT_DYNAMIC, _measure, 1, 1);
1.3 paf 1279:
1.25 paf 1280: // ^image.html[]
1281: // ^image.html[hash]
1.22 paf 1282: add_native_method("html", Method::CT_DYNAMIC, _html, 0, 1);
1.6 paf 1283:
1.25 paf 1284: // ^image.load[background.gif]
1.22 paf 1285: add_native_method("load", Method::CT_DYNAMIC, _load, 1, 1);
1.6 paf 1286:
1.25 paf 1287: // ^image.create[width;height] bgcolor=white
1288: // ^image.create[width;height;bgcolor]
1.22 paf 1289: add_native_method("create", Method::CT_DYNAMIC, _create, 2, 3);
1.6 paf 1290:
1.25 paf 1291: // ^image.gif[]
1.22 paf 1292: add_native_method("gif", Method::CT_DYNAMIC, _gif, 0, 0);
1.12 paf 1293:
1.25 paf 1294: // ^image.line(x0;y0;x1;y1;color)
1.22 paf 1295: add_native_method("line", Method::CT_DYNAMIC, _line, 5, 5);
1.13 paf 1296:
1.25 paf 1297: // ^image.fill(x;y;color)
1.22 paf 1298: add_native_method("fill", Method::CT_DYNAMIC, _fill, 3, 3);
1.13 paf 1299:
1.25 paf 1300: // ^image.rectangle(x0;y0;x1;y1;color)
1.22 paf 1301: add_native_method("rectangle", Method::CT_DYNAMIC, _rectangle, 5, 5);
1.13 paf 1302:
1.25 paf 1303: // ^image.bar(x0;y0;x1;y1;color)
1.22 paf 1304: add_native_method("bar", Method::CT_DYNAMIC, _bar, 5, 5);
1.13 paf 1305:
1.44 parser 1306: // ^image.replace(color-source;color-dest)[table x:y]
1307: add_native_method("replace", Method::CT_DYNAMIC, _replace, 3, 3);
1308:
1309: // ^image.polyline(color)[table x:y]
1310: add_native_method("polyline", Method::CT_DYNAMIC, _polyline, 2, 2);
1.13 paf 1311:
1.44 parser 1312: // ^image.polygon(color)[table x:y]
1313: add_native_method("polygon", Method::CT_DYNAMIC, _polygon, 2, 2);
1.13 paf 1314:
1.44 parser 1315: // ^image.polybar(color)[table x:y]
1316: add_native_method("polybar", Method::CT_DYNAMIC, _polybar, 2, 2);
1.13 paf 1317:
1.36 parser 1318: // ^image.font[alPHAbet;font-file-name.gif](spacebar_width)
1319: // ^image.font[alPHAbet;font-file-name.gif](spacebar_width;width)
1320: add_native_method("font", Method::CT_DYNAMIC, _font, 3, 4);
1.16 paf 1321:
1.25 paf 1322: // ^image.text(x;y)[text]
1.22 paf 1323: add_native_method("text", Method::CT_DYNAMIC, _text, 3, 3);
1.47 parser 1324:
1325: // ^image.ngth[text]
1326: add_native_method("length", Method::CT_DYNAMIC, _length, 1, 1);
1.16 paf 1327:
1.48 parser 1328: // ^image.arc(center x;center y;width;height;start in degrees;end in degrees;color)
1329: add_native_method("arc", Method::CT_DYNAMIC, _arc, 7, 7);
1.49 parser 1330:
1331: // ^image.sector(center x;center y;width;height;start in degrees;end in degrees;color)
1332: add_native_method("sector", Method::CT_DYNAMIC, _sector, 7, 7);
1.48 parser 1333:
1334: // ^image.circle(center x;center y;r;color)
1335: add_native_method("circle", Method::CT_DYNAMIC, _circle, 4, 4);
1336:
1.56 parser 1337: // ^image.copy[source](src x;src y;src w;src h;dst x;dst y[;dest w[;dest h[;tolerance]]])
1338: add_native_method("copy", Method::CT_DYNAMIC, _copy, 1+2+2+2, (1+2+2+2)+2+1);
1.1 paf 1339: }
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