Annotation of parser3/src/classes/image.C, revision 1.101
1.1 paf 1: /** @file
2: Parser: @b image parser class.
3:
1.91 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:
1.101 ! paf 8: static const char * const IDENT_IMAGE_C="$Date: 2003/11/20 17:07:43 $";
1.31 parser 9:
10: /*
11: jpegsize: gets the width and height (in pixels) of a jpeg file
12: Andrew Tong, werdna@ugcs.caltech.edu February 14, 1995
13: modified slightly by alex@ed.ac.uk
14: and further still by rjray@uswest.com
15: optimization and general re-write from tmetro@vl.com
16: from perl by paf@design.ru
1.1 paf 17: */
18:
19: #include "pa_config_includes.h"
20:
1.91 paf 21: #include "pa_vmethod_frame.h"
22:
1.8 paf 23: #include "gif.h"
1.6 paf 24:
1.1 paf 25: #include "pa_common.h"
26: #include "pa_request.h"
27: #include "pa_vfile.h"
28: #include "pa_vimage.h"
1.89 paf 29: #include "pa_vdate.h"
1.91 paf 30: #include "pa_table.h"
1.1 paf 31:
1.22 paf 32: // class
33:
1.91 paf 34: class MImage: public Methoded {
1.22 paf 35: public: // VStateless_class
1.98 paf 36: Value* create_new_value(Pool&) { return new VImage(); }
1.22 paf 37:
38: public:
1.91 paf 39: MImage();
1.24 paf 40:
41: public: // Methoded
1.22 paf 42: bool used_directly() { return true; }
43:
44: };
1.1 paf 45:
1.91 paf 46: // globals
47:
48: DECLARE_CLASS_VAR(image, new MImage, 0);
49:
1.1 paf 50: // helpers
51:
1.91 paf 52: /// value of exif tag -> it's value
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: 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;
153:
154:
1.43 parser 155: #ifndef DOXYGEN
1.1 paf 156: class Measure_reader {
157: public:
1.91 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 {
1.91 paf 164:
165: ;
166: const String& file_name; const char* fname;
167: int f;
168:
1.77 paf 169: public:
1.91 paf 170: Measure_file_reader(int af, const String& afile_name, const char* afname):
171: file_name(afile_name), fname(afname), f(af) {
1.1 paf 172: }
173:
1.91 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:
1.91 paf 178: char* lbuf=new(PointerFreeGC) 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,
182: &file_name,
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:
1.91 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",
1.77 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:
1.91 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 {
1.91 paf 202:
203: const char* buf; size_t size;
204: const String& file_name;
205:
206: size_t offset;
207:
1.77 paf 208: public:
1.91 paf 209: Measure_buf_reader(const char* abuf, size_t asize, const String& afile_name):
1.77 paf 210: buf(abuf), size(asize), file_name(afile_name), offset(0) {
211: }
212:
1.91 paf 213: override size_t read(const char* &abuf, size_t limit) {
1.77 paf 214: size_t to_read=min(limit, size-offset);
1.91 paf 215: abuf=buf+offset;
1.77 paf 216: offset+=to_read;
217: return to_read;
218: }
219:
1.91 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;
1.91 paf 225: default:
226: throw Exception(0,
227: 0,
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",
1.77 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:
1.91 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
1.91 paf 282: struct JPG_Exif_segment_begin {
1.79 paf 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
1.91 paf 294: struct JPG_Exif_IFD_begin {
1.80 paf 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:
1.91 paf 330: static void measure_gif(const String& origin_string,
1.78 paf 331: Measure_reader& reader, ushort& width, ushort& height) {
1.1 paf 332:
1.91 paf 333: const char* buf;
1.101 ! paf 334: if(reader.read(buf, head_size)<sizeof(GIF_Header))
1.68 paf 335: throw Exception("image.format",
1.91 paf 336: &origin_string,
1.34 parser 337: "not GIF file - too small");
1.31 parser 338: GIF_Header *head=(GIF_Header *)buf;
1.1 paf 339:
1.72 paf 340: if(strncmp(head->signature, "GIF", 3)!=0)
1.68 paf 341: throw Exception("image.format",
1.91 paf 342: &origin_string,
1.44 parser 343: "not GIF file - wrong signature");
1.1 paf 344:
1.80 paf 345: width=endian_to_ushort(false, head->width);
346: height=endian_to_ushort(false, head->height);
347: }
348:
1.91 paf 349: static Value* parse_IFD_entry_formatted_one_value(
1.80 paf 350: bool is_big,
351: ushort format,
352: size_t component_size,
353: const uchar *value) {
354: switch(format) {
355: case 1: // unsigned byte
1.91 paf 356: return new VInt((uchar)value[0]);
1.80 paf 357: case 3: // unsigned short
1.91 paf 358: return new VInt(endian_to_ushort(is_big, value));
1.80 paf 359: case 4: // unsigned long
360: // 'double' because parser's Int is signed
1.91 paf 361: return new VDouble(endian_to_uint(is_big, value));
1.80 paf 362: case 5: // unsigned rational
363: {
364: uint numerator=endian_to_uint(is_big, value); value+=component_size/2;
365: uint denominator=endian_to_uint(is_big, value);
366: if(!denominator)
367: return 0;
1.91 paf 368: return new VDouble(((double)numerator)/denominator);
1.80 paf 369: }
370: case 6: // signed byte
1.91 paf 371: return new VInt((signed char)value[0]);
1.80 paf 372: case 8: // signed short
1.91 paf 373: return new VInt((signed short)endian_to_ushort(is_big, value));
1.80 paf 374: case 9: // signed long
1.91 paf 375: return new VInt((signed int)endian_to_uint(is_big, value));
1.80 paf 376: case 10: // signed rational
377: {
378: signed int numerator=(signed int)endian_to_uint(is_big, value); value+=component_size/2;
379: uint denominator=endian_to_uint(is_big, value);
380: if(!denominator)
381: return 0;
1.91 paf 382: return new VDouble(numerator/denominator);
1.80 paf 383: }
384: /*
385: case 11: // single float
386: todo
387: case 12: // double float
388: todo
389: */
390: };
391:
392: return 0;
393: }
394:
1.89 paf 395: // date.C
1.91 paf 396: time_t cstr_to_time_t(char *cstr, bool fail_on_error);
1.89 paf 397:
1.91 paf 398: static Value* parse_IFD_entry_formatted_value(bool is_big, ushort format,
399: size_t component_size, uint components_count,
400: const uchar *value) {
1.80 paf 401: if(format==2) { // ascii string, exception: the only type with varying size
1.91 paf 402: const char* cstr=(const char* )value;
403: size_t length=components_count;
1.89 paf 404: // Data format is "YYYY:MM:DD HH:MM:SS"+0x00, total 20bytes
1.91 paf 405: if(length==JPEG_EXIF_DATE_CHARS
1.89 paf 406: && isdigit(cstr[0])
1.91 paf 407: && cstr[length-1]==0) {
1.89 paf 408: char cstr_writable[JPEG_EXIF_DATE_CHARS];
409: strcpy(cstr_writable, cstr);
410:
1.91 paf 411: time_t t=cstr_to_time_t(cstr_writable,
1.94 paf 412: false/* do not throw exception, just return bad result */);
1.89 paf 413: if(t>=0)
1.91 paf 414: return new VDate(t);
1.89 paf 415: }
416:
1.91 paf 417: if(const char* premature_zero_pos=(const char* )memchr(cstr, 0, length))
418: length=premature_zero_pos-cstr;
419: return new VString(*new String(cstr, length, true/*tainted*/));
1.80 paf 420: }
421:
422: if(components_count==1)
1.91 paf 423: return parse_IFD_entry_formatted_one_value(is_big, format, component_size, value);
1.80 paf 424:
1.91 paf 425: VHash* result=new VHash;
426: HashStringValue& hash=result->hash();
1.80 paf 427: for(uint i=0; i<components_count; i++, value+=component_size) {
1.91 paf 428: hash.put(
1.93 paf 429: String::Body::Format(i),
1.91 paf 430: parse_IFD_entry_formatted_one_value(is_big, format, component_size, value));
1.80 paf 431: }
432:
1.91 paf 433: return result;
1.80 paf 434: }
435:
1.91 paf 436: static Value* parse_IFD_entry_value(
1.80 paf 437: bool is_big, Measure_reader& reader, long tiff_base,
438: JPG_Exif_IFD_entry& entry) {
439: size_t format2component_size[]={
440: 0, // undefined
441: 1, // unsigned byte
442: 1, // ascii string
443: 2, // unsigned short
444: 4, // unsigned long
445: 8, // unsigned rational
446: 1, // signed byte
447: 0, // undefined
448: 2, // signed short
449: 4, // signed long
450: 8, // signed rational
451: /*
452: 4, // single float
453: 8, // double float
454: */
455: };
456:
457: ushort format=endian_to_ushort(is_big, entry.format);
458: if(format>=sizeof(format2component_size)/sizeof(format2component_size[0]))
459: return 0; // format out of range, ignoring
460:
461: size_t component_size=format2component_size[format];
462: if(component_size==0)
463: return 0; // undefined format
464:
465: // You can get the total data byte length by multiplies
466: // a 'bytes/components' value (see above chart) by number of components stored 'NNNNNNNN' area
467: uint components_count=endian_to_uint(is_big, entry.components_count);
468: size_t value_size=component_size*components_count;
469: // If its size is over 4bytes, 'DDDDDDDD' contains the offset to data stored address
1.91 paf 470: Value* result;
1.80 paf 471:
472: if(value_size<=4)
1.91 paf 473: result=parse_IFD_entry_formatted_value(
1.80 paf 474: is_big, format,
475: component_size, components_count,
476: entry.value_or_offset_to_it);
477: else {
478: long remembered=reader.tell();
479: {
480: reader.seek(tiff_base+endian_to_uint(is_big, entry.value_or_offset_to_it), SEEK_SET);
1.91 paf 481: const char* value;
1.80 paf 482: if(reader.read(value, value_size)<sizeof(value_size))
483: return 0;
1.91 paf 484: result=parse_IFD_entry_formatted_value(
1.80 paf 485: is_big, format,
486: component_size, components_count,
487: (const uchar*)value);
488: }
489: reader.seek(remembered, SEEK_SET);
490: }
491:
492: return result;
493: }
494:
1.91 paf 495: static void parse_IFD(HashStringValue& hash,
496: bool is_big, Measure_reader& reader, long tiff_base);
497:
498: static void parse_IFD_entry(HashStringValue& hash,
499: bool is_big, Measure_reader& reader, long tiff_base,
500: JPG_Exif_IFD_entry& entry) {
1.80 paf 501: ushort tag=endian_to_ushort(is_big, entry.tag);
502: if(tag==JPG_IFD_TAG_EXIF_OFFSET) {
503: long remembered=reader.tell();
504: {
505: reader.seek(tiff_base+endian_to_uint(is_big, entry.value_or_offset_to_it), SEEK_SET);
1.91 paf 506: parse_IFD(hash, is_big, reader, tiff_base);
1.80 paf 507: }
508: reader.seek(remembered, SEEK_SET);
509: return;
510: }
511:
1.91 paf 512: if(Value* value=parse_IFD_entry_value(is_big, reader, tiff_base, entry)) {
513: if(const char* name=exif_tag_value2name.get(tag))
1.93 paf 514: hash.put(String::Body(name), value);
1.80 paf 515: else
1.93 paf 516: hash.put(String::Body::Format(tag), value);
1.80 paf 517: }
1.1 paf 518: }
519:
1.91 paf 520: static void parse_IFD(
521: HashStringValue& hash,
522: bool is_big, Measure_reader& reader, long tiff_base) {
523: const char* buf;
524: if(reader.read(buf, sizeof(JPG_Exif_IFD_begin))<sizeof(JPG_Exif_IFD_begin))
1.80 paf 525: return;
1.91 paf 526: JPG_Exif_IFD_begin *start=(JPG_Exif_IFD_begin *)buf;
1.80 paf 527:
528: ushort directory_entry_count=endian_to_ushort(is_big, start->directory_entry_count);
529: for(int i=0; i<directory_entry_count; i++) {
530: if(reader.read(buf, sizeof(JPG_Exif_IFD_entry))<sizeof(JPG_Exif_IFD_entry))
531: return;
532:
1.91 paf 533: parse_IFD_entry(hash, is_big, reader, tiff_base, *(JPG_Exif_IFD_entry *)buf);
1.80 paf 534: }
535: // then goes: LLLLLLLL Offset to next IFD [not going there]
536: }
537:
1.91 paf 538: static Value* parse_exif(Measure_reader& reader, const String& origin_string) {
539: const char* buf;
540: if(reader.read(buf, sizeof(JPG_Exif_segment_begin))<sizeof(JPG_Exif_segment_begin))
1.80 paf 541: throw Exception("image.format",
1.91 paf 542: &origin_string,
1.80 paf 543: "not JPEG file - can not fully read Exif segment start");
544:
1.91 paf 545: JPG_Exif_segment_begin *start=(JPG_Exif_segment_begin *)buf;
1.80 paf 546: if(memcmp(start->signature, "Exif\0\0", 4+2)!=0) //signature invalid?
547: return 0; // ignore invalid block
548:
549: uint tiff_base=reader.tell();
550: if(reader.read(buf, sizeof(JPG_Exif_TIFF_header))<sizeof(JPG_Exif_TIFF_header))
551: return 0;
552:
553: JPG_Exif_TIFF_header *head=(JPG_Exif_TIFF_header *)buf;
554: bool is_big=head->byte_align_identifier[0]=='M'; // [M]otorola vs [I]ntel
555:
556: uint first_IFD_offset=endian_to_uint(is_big, head->first_IFD_offset);
557: reader.seek(tiff_base+first_IFD_offset, SEEK_SET);
558:
1.91 paf 559: VHash* vhash=new VHash;
1.80 paf 560:
561: // IFD
1.91 paf 562: parse_IFD(vhash->hash(), is_big, reader, tiff_base);
1.80 paf 563:
1.91 paf 564: return vhash;
1.80 paf 565: }
566:
1.91 paf 567: static void measure_jpeg(const String& origin_string,
568: Measure_reader& reader, ushort& width, ushort& height, Value** exif) {
1.2 paf 569: // JFIF format markers
1.80 paf 570: const uchar MARKER=0xFF;
571: const uchar CODE_SIZE_A=0xC0;
572: const uchar CODE_SIZE_B=0xC1;
573: const uchar CODE_SIZE_C=0xC2;
574: const uchar CODE_SIZE_D=0xC3;
575: const uchar CODE_EXIF=0xE1;
1.2 paf 576:
1.91 paf 577: const char* buf;
1.18 paf 578: const size_t prefix_size=2;
1.31 parser 579: if(reader.read(buf, prefix_size)<prefix_size)
1.68 paf 580: throw Exception("image.format",
1.91 paf 581: &origin_string,
1.34 parser 582: "not JPEG file - too small");
1.80 paf 583: uchar *signature=(uchar *)buf;
1.1 paf 584:
1.31 parser 585: if(!(signature[0]==0xFF && signature[1]==0xD8))
1.68 paf 586: throw Exception("image.format",
1.91 paf 587: &origin_string,
1.44 parser 588: "not JPEG file - wrong signature");
1.31 parser 589:
590: while(true) {
1.80 paf 591: uint segment_base=reader.tell()+2/*marker,code*/;
1.31 parser 592: if(reader.read(buf, sizeof(JPG_Segment_head))<sizeof(JPG_Segment_head))
1.79 paf 593: break;
1.31 parser 594: JPG_Segment_head *head=(JPG_Segment_head *)buf;
595:
596: // Verify that it's a valid segment.
597: if(head->marker!=MARKER)
1.79 paf 598: throw Exception("image.format",
1.91 paf 599: &origin_string,
1.79 paf 600: "not JPEG file - marker not found");
601:
602: switch(head->code) {
603: // http://www.ba.wakwak.com/~tsuruzoh/Computer/Digicams/exif-e.html
604: case CODE_EXIF:
1.80 paf 605: if(exif && !*exif) // seen .jpg with some xml under EXIF tag, after real exif block :)
1.91 paf 606: *exif=parse_exif(reader, origin_string);
1.1 paf 607: break;
1.31 parser 608:
1.79 paf 609: case CODE_SIZE_A:
610: case CODE_SIZE_B:
611: case CODE_SIZE_C:
612: case CODE_SIZE_D:
613: {
614: // Segments that contain size info
615: if(reader.read(buf, sizeof(JPG_Size_segment_body))<sizeof(JPG_Size_segment_body))
616: throw Exception("image.format",
1.91 paf 617: &origin_string,
1.79 paf 618: "not JPEG file - can not fully read Size segment");
619: JPG_Size_segment_body *body=(JPG_Size_segment_body *)buf;
620:
1.80 paf 621: width=endian_to_ushort(true, body->width);
622: height=endian_to_ushort(true, body->height);
1.79 paf 623: }
1.80 paf 624: return;
1.79 paf 625: };
626:
1.80 paf 627: reader.seek(segment_base+endian_to_ushort(true, head->length), SEEK_SET);
1.31 parser 628: }
629:
1.79 paf 630: throw Exception("image.format",
1.91 paf 631: &origin_string,
1.79 paf 632: "broken JPEG file - size frame not found");
1.1 paf 633: }
634:
1.91 paf 635: static void measure_png(const String& origin_string,
1.78 paf 636: Measure_reader& reader, ushort& width, ushort& height) {
1.72 paf 637:
1.91 paf 638: const char* buf;
1.101 ! paf 639: if(reader.read(buf, head_size)<sizeof(PNG_Header))
1.72 paf 640: throw Exception("image.format",
1.91 paf 641: &origin_string,
1.72 paf 642: "not PNG file - too small");
643: PNG_Header *head=(PNG_Header *)buf;
644:
645: if(strncmp(head->signature, "IHDR", 4)!=0)
646: throw Exception("image.format",
1.91 paf 647: &origin_string,
1.72 paf 648: "not PNG file - wrong signature");
649:
1.80 paf 650: width=endian_to_ushort(true, head->width);
651: height=endian_to_ushort(true, head->height);
1.72 paf 652: }
653:
1.1 paf 654: // measure center
655:
1.91 paf 656: static void measure(const String& file_name,
657: Measure_reader& reader, ushort& width, ushort& height, Value** exif) {
658: const char* file_name_cstr=file_name.cstr(String::L_FILE_SPEC);
659: if(const char* cext=strrchr(file_name_cstr, '.')) {
1.1 paf 660: cext++;
661: if(strcasecmp(cext, "GIF")==0)
1.91 paf 662: measure_gif(file_name, reader, width, height);
1.1 paf 663: else if(strcasecmp(cext, "JPG")==0 || strcasecmp(cext, "JPEG")==0)
1.91 paf 664: measure_jpeg(file_name, reader, width, height, exif);
1.72 paf 665: else if(strcasecmp(cext, "PNG")==0)
1.91 paf 666: measure_png(file_name, reader, width, height);
1.1 paf 667: else
1.68 paf 668: throw Exception("image.format",
1.1 paf 669: &file_name,
670: "unhandled image file name extension '%s'", cext);
671: } else
1.68 paf 672: throw Exception("image.format",
1.1 paf 673: &file_name,
674: "can not determine image type - no file name extension");
675: }
676:
1.77 paf 677: // methods
1.1 paf 678:
1.40 parser 679: #ifndef DOXYGEN
1.77 paf 680: struct File_measure_action_info {
1.91 paf 681: ushort* width;
682: ushort* height;
683: Value** exif;
684: const String* file_name;
1.1 paf 685: };
1.40 parser 686: #endif
1.91 paf 687: static void file_measure_action(
1.98 paf 688: struct stat& /*finfo*/, int f,
689: const String& /*file_spec*/, const char* fname, bool /*as_text*/,
1.77 paf 690: void *context) {
691: File_measure_action_info& info=*static_cast<File_measure_action_info *>(context);
1.1 paf 692:
1.91 paf 693: Measure_file_reader reader(f, *info.file_name, fname);
694: measure(*info.file_name, reader, *info.width, *info.height, info.exif);
1.1 paf 695: }
696:
1.91 paf 697: static void _measure(Request& r, MethodParams& params) {
698: Value& data=params.as_no_junction(0, "data must not be code");
1.1 paf 699:
1.78 paf 700: ushort width=0;
701: ushort height=0;
1.91 paf 702: Value* exif=0;
703: const String* file_name;
1.100 paf 704: if((file_name=data.get_string())) {
705: File_measure_action_info info={
706: &width, &height,
707: &exif,
708: file_name
709: };
1.91 paf 710: file_read_action_under_lock(r.absolute(*file_name),
1.77 paf 711: "measure", file_measure_action, &info);
1.1 paf 712: } else {
1.91 paf 713: VFile* vfile=data.as_vfile();
714: file_name=&vfile->fields().get(name_name)->as_string();
1.77 paf 715: Measure_buf_reader reader(
1.91 paf 716: vfile->value_ptr(),
717: vfile->value_size(),
1.77 paf 718: *file_name
719: );
1.91 paf 720: measure(*file_name, reader, width, height, &exif);
1.1 paf 721: }
722:
1.91 paf 723: GET_SELF(r, VImage).set(file_name, width, height, 0, exif);
1.1 paf 724: }
725:
1.40 parser 726: #ifndef DOXYGEN
1.4 paf 727: struct Attrib_info {
1.91 paf 728: String* tag; ///< html tag being constructed
729: HashStringValue* skip; ///< tag attributes not to append to tag string [to skip]
1.4 paf 730: };
1.40 parser 731: #endif
1.91 paf 732: static void append_attrib_pair(
733: HashStringValue::key_type key,
734: HashStringValue::value_type value,
735: Attrib_info* info) {
1.49 parser 736: // skip user-specified and internal(starting with "line-") attributes
1.91 paf 737: if(info->skip && info->skip->get(key) || key.pos("line-")==0)
1.4 paf 738: return;
739:
1.3 paf 740: // src="a.gif" width=123 ismap[=-1]
1.91 paf 741: *info->tag << " " << key;
742: if(value->is_string() || value->as_int()>=0)
743: *info->tag << "=\"" << value->as_string() << "\"";
1.3 paf 744: }
1.91 paf 745: static void _html(Request& r, MethodParams& params) {
1.3 paf 746:
1.91 paf 747: String tag;
1.3 paf 748: tag << "<img";
1.4 paf 749:
1.91 paf 750: const HashStringValue& fields=GET_SELF(r, VImage).fields();
751: HashStringValue* attribs=0;
1.4 paf 752:
1.91 paf 753: if(params.count()) {
1.69 paf 754: // for backward compatibility: someday was ^html{}
1.91 paf 755: Value& vattribs=r.process_to_value(params[0],
1.52 parser 756: false/*don't intercept string*/);
1.82 paf 757: if(!vattribs.is_string()) // allow empty
1.100 paf 758: if((attribs=vattribs.get_hash())) {
759: Attrib_info info={&tag, 0};
1.91 paf 760: attribs->for_each(append_attrib_pair, &info);
1.39 parser 761: } else
1.68 paf 762: throw Exception("parser.runtime",
1.91 paf 763: 0,
1.39 parser 764: "attributes must be hash");
765: }
1.4 paf 766:
1.91 paf 767: {
768: Attrib_info info={&tag, attribs};
769: fields.for_each(append_attrib_pair, &info);
770: }
1.6 paf 771: tag << " />";
1.3 paf 772: r.write_pass_lang(tag);
773: }
1.8 paf 774:
1.68 paf 775: /// @test wrap FILE to auto-object
1.91 paf 776: static gdImage* load(Request& r,
1.16 paf 777: const String& file_name){
1.91 paf 778: const char* file_name_cstr=r.absolute(file_name).cstr(String::L_FILE_SPEC);
1.16 paf 779: if(FILE *f=fopen(file_name_cstr, "rb")) {
1.91 paf 780: gdImage* image=new gdImage;
781: bool ok=image->CreateFromGif(f);
1.16 paf 782: fclose(f);
1.23 paf 783: if(!ok)
1.68 paf 784: throw Exception("image.format",
1.23 paf 785: &file_name,
786: "is not in GIF format");
1.91 paf 787: return image;
1.16 paf 788: } else {
1.68 paf 789: throw Exception("file.missing",
1.91 paf 790: 0,
1.16 paf 791: "can not open '%s'", file_name_cstr);
792: }
793: }
794:
795:
1.91 paf 796: static void _load(Request& r, MethodParams& params) {
797: const String& file_name=params.as_string(0, "file name must not be code");
1.6 paf 798:
1.91 paf 799: gdImage* image=load(r, file_name);
800: GET_SELF(r, VImage).set(&file_name, image->SX(), image->SY(), image);
1.6 paf 801: }
802:
1.91 paf 803: static void _create(Request& r, MethodParams& params) {
804: int width=params.as_int(0, "width must be int", r);
805: int height=params.as_int(1, "height must be int", r);
1.8 paf 806: int bgcolor_value=0xffFFff;
1.91 paf 807: if(params.count()>2)
808: bgcolor_value=params.as_int(2, "color must be int", r);
809: gdImage* image=new gdImage;
810: image->Create(width, height);
811: image->FilledRectangle(0, 0, width-1, height-1, image->Color(bgcolor_value));
812: GET_SELF(r, VImage).set(0, width, height, image);
1.6 paf 813: }
814:
1.91 paf 815: static void _gif(Request& r, MethodParams& params) {
816: gdImage* image=GET_SELF(r, VImage).image;
1.8 paf 817: if(!image)
1.68 paf 818: throw Exception(0,
1.91 paf 819: 0,
1.12 paf 820: "does not contain an image");
1.6 paf 821:
1.95 paf 822: const String *file_name=0;
823: if(params.count()>0)
824: file_name=¶ms.as_string(0, "file name must be string");
1.10 paf 825:
1.91 paf 826: gdBuf buf=image->Gif();
1.6 paf 827:
1.91 paf 828: VFile& vfile=*new VFile;
829: Value* content_type=new VString(*new String("image/gif"));
1.20 paf 830: vfile.set(false/*not tainted*/,
1.95 paf 831: (const char*)buf.ptr, buf.size,
832: file_name? file_name->cstr(String::L_FILE_SPEC): 0,
833: content_type);
1.6 paf 834:
835: r.write_no_lang(vfile);
836: }
837:
1.91 paf 838: static void _line(Request& r, MethodParams& params) {
839: gdImage* image=GET_SELF(r, VImage).image;
1.12 paf 840: if(!image)
1.68 paf 841: throw Exception(0,
1.91 paf 842: 0,
1.12 paf 843: "does not contain an image");
844:
845: image->Line(
1.91 paf 846: params.as_int(0, "x0 must be int", r),
847: params.as_int(1, "y0 must be int", r),
848: params.as_int(2, "x1 must be int", r),
849: params.as_int(3, "y1 must be int", r),
850: image->Color(params.as_int(4, "color must be int", r)));
1.13 paf 851: }
852:
1.91 paf 853: static void _fill(Request& r, MethodParams& params) {
854: gdImage* image=GET_SELF(r, VImage).image;
1.13 paf 855: if(!image)
1.68 paf 856: throw Exception(0,
1.91 paf 857: 0,
1.13 paf 858: "does not contain an image");
1.12 paf 859:
1.13 paf 860: image->Fill(
1.91 paf 861: params.as_int(0, "x must be int", r),
862: params.as_int(1, "y must be int", r),
863: image->Color(params.as_int(2, "color must be int", r)));
1.13 paf 864: }
865:
1.91 paf 866: static void _rectangle(Request& r, MethodParams& params) {
867: gdImage* image=GET_SELF(r, VImage).image;
1.13 paf 868: if(!image)
1.68 paf 869: throw Exception(0,
1.91 paf 870: 0,
1.13 paf 871: "does not contain an image");
872:
873: image->Rectangle(
1.91 paf 874: params.as_int(0, "x0 must be int", r),
875: params.as_int(1, "y0 must be int", r),
876: params.as_int(2, "x1 must be int", r),
877: params.as_int(3, "y1 must be int", r),
878: image->Color(params.as_int(4, "color must be int", r)));
1.13 paf 879: }
880:
1.91 paf 881: static void _bar(Request& r, MethodParams& params) {
882: gdImage* image=GET_SELF(r, VImage).image;
1.13 paf 883: if(!image)
1.68 paf 884: throw Exception(0,
1.91 paf 885: 0,
1.13 paf 886: "does not contain an image");
887:
888: image->FilledRectangle(
1.91 paf 889: params.as_int(0, "x0 must be int", r),
890: params.as_int(1, "y0 must be int", r),
891: params.as_int(2, "x1 must be int", r),
892: params.as_int(3, "y1 must be int", r),
893: image->Color(params.as_int(4, "color must be int", r)));
1.13 paf 894: }
895:
1.44 parser 896: #ifndef DOXYGEN
1.91 paf 897: static void add_point(Table::element_type row,
898: gdImage::Point **p) {
899: (**p).x=row->get(0)->as_int();
900: (**p).y=row->get(1)->as_int();
1.44 parser 901: (*p)++;
902: }
903: #endif
1.91 paf 904: static void _replace(Request& r, MethodParams& params) {
905: gdImage* image=GET_SELF(r, VImage).image;
1.13 paf 906: if(!image)
1.68 paf 907: throw Exception(0,
1.91 paf 908: 0,
1.13 paf 909: "does not contain an image");
910:
1.91 paf 911: Table* table=params.as_no_junction(2, "coordinates must not be code").get_table();
1.44 parser 912: if(!table)
1.68 paf 913: throw Exception(0,
1.91 paf 914: 0,
1.44 parser 915: "coordinates must be table");
1.13 paf 916:
1.92 paf 917: gdImage::Point *all_p=new(PointerFreeGC) gdImage::Point[table->count()];
1.44 parser 918: gdImage::Point *add_p=all_p;
919: table->for_each(add_point, &add_p);
1.91 paf 920: image->FilledPolygonReplaceColor(all_p, table->count(),
921: image->Color(params.as_int(0, "src color must be int", r)),
922: image->Color(params.as_int(1, "dest color must be int", r)));
1.13 paf 923: }
924:
1.91 paf 925: static void _polyline(Request& r, MethodParams& params) {
926: gdImage* image=GET_SELF(r, VImage).image;
1.13 paf 927: if(!image)
1.68 paf 928: throw Exception(0,
1.91 paf 929: 0,
1.13 paf 930: "does not contain an image");
931:
1.91 paf 932: Table* table=params.as_no_junction(1, "coordinates must not be code").get_table();
1.44 parser 933: if(!table)
1.68 paf 934: throw Exception(0,
1.91 paf 935: 0,
1.44 parser 936: "coordinates must be table");
937:
1.92 paf 938: gdImage::Point* all_p=new(PointerFreeGC) gdImage::Point[table->count()];
1.44 parser 939: gdImage::Point *add_p=all_p;
940: table->for_each(add_point, &add_p);
1.91 paf 941: image->Polygon(all_p, table->count(),
942: image->Color(params.as_int(0, "color must be int", r)),
1.44 parser 943: false/*not closed*/);
944: }
945:
1.91 paf 946: static void _polygon(Request& r, MethodParams& params) {
947: gdImage* image=GET_SELF(r, VImage).image;
1.44 parser 948: if(!image)
1.68 paf 949: throw Exception(0,
1.91 paf 950: 0,
1.44 parser 951: "does not contain an image");
1.13 paf 952:
1.91 paf 953: Table* table=params.as_no_junction(1, "coordinates must not be code").get_table();
1.44 parser 954: if(!table)
1.68 paf 955: throw Exception(0,
1.91 paf 956: 0,
1.44 parser 957: "coordinates must be table");
958:
1.92 paf 959: gdImage::Point* all_p=new(PointerFreeGC) gdImage::Point[table->count()];
1.44 parser 960: gdImage::Point *add_p=all_p;
961: table->for_each(add_point, &add_p);
1.91 paf 962: image->Polygon(all_p, table->count(),
963: image->Color(params.as_int(0, "color must be int", r)));
1.13 paf 964: }
965:
1.91 paf 966: static void _polybar(Request& r, MethodParams& params) {
967: gdImage* image=GET_SELF(r, VImage).image;
1.13 paf 968: if(!image)
1.68 paf 969: throw Exception(0,
1.91 paf 970: 0,
1.13 paf 971: "does not contain an image");
972:
1.91 paf 973: Table* table=params.as_no_junction(1, "coordinates must not be code").get_table();
1.44 parser 974: if(!table)
1.68 paf 975: throw Exception("parser.runtime",
1.91 paf 976: 0,
1.44 parser 977: "coordinates must be table");
1.13 paf 978:
1.92 paf 979: gdImage::Point* all_p=new(PointerFreeGC) gdImage::Point[table->count()];
1.44 parser 980: gdImage::Point *add_p=all_p;
981: table->for_each(add_point, &add_p);
1.91 paf 982: image->FilledPolygon(all_p, table->count(),
983: image->Color(params.as_int(0, "color must be int", r)));
1.12 paf 984: }
985:
1.16 paf 986: // font
987:
1.85 paf 988: #define Y(y)(y+index*height)
1.21 paf 989:
1.91 paf 990: // Font class
991:
992: const int Font::letter_spacing=1;
993:
994: Font::Font(//,
995: const String& aalphabet,
996: gdImage* aifont, int aheight, int amonospace, int aspacebarspace):
997: height(aheight), monospace(amonospace), spacebarspace(aspacebarspace),
1.100 paf 998: ifont(aifont),
999: alphabet(aalphabet) {
1.91 paf 1000: }
1001:
1002: /* ******************************** char ********************************** */
1003:
1004: size_t Font::index_of(char ch) {
1005: if(ch==' ') return STRING_NOT_FOUND;
1006: return alphabet.pos(ch);
1007: }
1008:
1009: int Font::index_width(size_t index) {
1010: if(index==STRING_NOT_FOUND)
1011: return spacebarspace;
1012: int tr=ifont->GetTransparent();
1013: for(int x=ifont->SX()-1; x>=0; x--) {
1014: for(int y=0; y<height; y++)
1015: if(ifont->GetPixel(x, Y(y))!=tr)
1016: return x+1;
1.16 paf 1017: }
1.91 paf 1018: return 0;
1019: }
1020:
1021: void Font::index_display(gdImage* image, int x, int y, size_t index){
1022: if(index!=STRING_NOT_FOUND)
1023: ifont->Copy(*image, x, y, 0, Y(0), index_width(index), height);
1024: }
1025:
1026: /* ******************************** string ********************************** */
1027:
1028: int Font::step_width(int index) {
1029: return letter_spacing + (monospace ? monospace : index_width(index));
1030: }
1031:
1032: // counts trailing letter_spacing, consider this OK. useful for contiuations
1033: int Font::string_width(const String& s){
1034: const char* cstr=s.cstr();
1035: int result=0;
1036: for(const char* current=cstr; *current; current++)
1037: result+=step_width(index_of(*current));
1038: return result;
1039: }
1040:
1041: void Font::string_display(gdImage* image, int x, int y, const String& s){
1042: const char* cstr=s.cstr();
1043: for(const char* current=cstr; *current; current++) {
1044: size_t index=index_of(*current);
1045: index_display(image, x, y, index);
1046: x+=step_width(index);
1.87 paf 1047: }
1.91 paf 1048: }
1.87 paf 1049:
1.91 paf 1050: //
1.35 parser 1051:
1.16 paf 1052:
1.91 paf 1053: static void _font(Request& r, MethodParams& params) {
1054: const String& alphabet=params.as_string(0, "alphabet must not be code");
1055: gdImage* image=load(r, params.as_string(1, "file_name must not be code"));
1056: int spacebar_width=params.as_int(2, "spacebar_width must be int", r);
1.37 parser 1057: int monospace_width;
1.91 paf 1058: if(params.count()>3) {
1059: monospace_width=params.as_int(3, "monospace_width must be int", r);
1.37 parser 1060: if(!monospace_width)
1.91 paf 1061: monospace_width=image->SX();
1.37 parser 1062: } else
1063: monospace_width=0;
1.16 paf 1064:
1.91 paf 1065: if(!alphabet.length())
1.68 paf 1066: throw Exception("parser.runtime",
1.91 paf 1067: 0,
1.37 parser 1068: "alphabet must not be empty");
1.84 paf 1069:
1.91 paf 1070: if(int remainder=image->SY() % alphabet.length())
1.84 paf 1071: throw Exception("parser.runtime",
1.91 paf 1072: 0,
1.84 paf 1073: "font-file height(%d) not divisable by alphabet size(%d), remainder=%d",
1.91 paf 1074: image->SY(), alphabet.length(), remainder);
1.37 parser 1075:
1.91 paf 1076: GET_SELF(r, VImage).font=new Font(
1.37 parser 1077: alphabet,
1.36 parser 1078: image,
1.91 paf 1079: image->SY() / alphabet.length(), monospace_width, spacebar_width);
1.16 paf 1080: }
1081:
1.91 paf 1082: static void _text(Request& r, MethodParams& params) {
1083: int x=params.as_int(0, "x must be int", r);
1084: int y=params.as_int(1, "y must be int", r);
1085: const String& s=params.as_string(2, "text must not be code");
1.16 paf 1086:
1.91 paf 1087: VImage& vimage=GET_SELF(r, VImage);
1.16 paf 1088: if(vimage.image)
1089: if(vimage.font)
1.91 paf 1090: vimage.font->string_display(vimage.image, x, y, s);
1.16 paf 1091: else
1.68 paf 1092: throw Exception("parser.runtime",
1.91 paf 1093: 0,
1.16 paf 1094: "set the font first");
1095: else
1.68 paf 1096: throw Exception(0,
1.91 paf 1097: 0,
1.16 paf 1098: "does not contain an image");
1099: }
1100:
1.91 paf 1101: static void _length(Request& r, MethodParams& params) {
1102: const String& s=params.as_string(0, "text must not be code");
1.47 parser 1103:
1.91 paf 1104: VImage& vimage=GET_SELF(r, VImage);
1.47 parser 1105: if(vimage.image)
1106: if(vimage.font) {
1.91 paf 1107: r.write_no_lang(*new VInt(vimage.font->string_width(s)));
1.47 parser 1108: } else
1.68 paf 1109: throw Exception("parser.runtime",
1.91 paf 1110: 0,
1.47 parser 1111: "set the font first");
1112: else
1.68 paf 1113: throw Exception(0,
1.91 paf 1114: 0,
1.47 parser 1115: "does not contain an image");
1116: }
1117:
1.91 paf 1118: static void _arc(Request& r, MethodParams& params) {
1119: gdImage* image=GET_SELF(r, VImage).image;
1.48 parser 1120: if(!image)
1.68 paf 1121: throw Exception(0,
1.91 paf 1122: 0,
1.48 parser 1123: "does not contain an image");
1124:
1125: image->Arc(
1.91 paf 1126: params.as_int(0, "center_x must be int", r),
1127: params.as_int(1, "center_y must be int", r),
1128: params.as_int(2, "width must be int", r),
1129: params.as_int(3, "height must be int", r),
1130: params.as_int(4, "start degrees must be int", r),
1131: params.as_int(5, "end degrees must be int", r),
1132: image->Color(params.as_int(6, "cx must be int", r)));
1.48 parser 1133: }
1134:
1.91 paf 1135: static void _sector(Request& r, MethodParams& params) {
1136: gdImage* image=GET_SELF(r, VImage).image;
1.49 parser 1137: if(!image)
1.68 paf 1138: throw Exception(0,
1.91 paf 1139: 0,
1.49 parser 1140: "does not contain an image");
1141:
1142: image->Sector(
1.91 paf 1143: params.as_int(0, "center_x must be int", r),
1144: params.as_int(1, "center_y must be int", r),
1145: params.as_int(2, "width must be int", r),
1146: params.as_int(3, "height must be int", r),
1147: params.as_int(4, "start degrees must be int", r),
1148: params.as_int(5, "end degrees must be int", r),
1149: image->Color(params.as_int(6, "color must be int", r)));
1.49 parser 1150: }
1151:
1.91 paf 1152: static void _circle(Request& r, MethodParams& params) {
1153: gdImage* image=GET_SELF(r, VImage).image;
1.48 parser 1154: if(!image)
1.68 paf 1155: throw Exception(0,
1.91 paf 1156: 0,
1.48 parser 1157: "does not contain an image");
1158:
1.91 paf 1159: int size=params.as_int(2, "radius must be int", r)*2;
1.48 parser 1160: image->Arc(
1.91 paf 1161: params.as_int(0, "center_x must be int", r),
1162: params.as_int(1, "center_y must be int", r),
1.50 parser 1163: size, //w
1164: size, //h
1.48 parser 1165: 0, //s
1166: 360, //e
1.91 paf 1167: image->Color(params.as_int(3, "color must be int", r)));
1.48 parser 1168: }
1169:
1.91 paf 1170: gdImage* as_image(MethodParams& params, int index, const char* msg) {
1171: gdImage* src=0;
1.75 paf 1172:
1.91 paf 1173: Value& value=params.as_no_junction(index, msg);
1.53 parser 1174:
1.91 paf 1175: if(Value* vimage=value.as(VIMAGE_TYPE, false)) {
1.75 paf 1176: src=static_cast<VImage *>(vimage)->image;
1177: if(!src)
1178: throw Exception("parser.runtime",
1.91 paf 1179: 0,
1.75 paf 1180: msg);
1181: } else
1.68 paf 1182: throw Exception("parser.runtime",
1.91 paf 1183: 0,
1.53 parser 1184: msg);
1185:
1.91 paf 1186: return src;
1.53 parser 1187: }
1188:
1.91 paf 1189: static void _copy(Request& r, MethodParams& params) {
1190: gdImage* dest=GET_SELF(r, VImage).image;
1.53 parser 1191: if(!dest)
1.68 paf 1192: throw Exception(0,
1.91 paf 1193: 0,
1.53 parser 1194: "self does not contain an image");
1195:
1.91 paf 1196: gdImage* src=as_image(params, 0, "src must be image");
1.53 parser 1197:
1.91 paf 1198: int sx=params.as_int(1, "src_x must be int", r);
1199: int sy=params.as_int(2, "src_y must be int", r);
1200: int sw=params.as_int(3, "src_w must be int", r);
1201: int sh=params.as_int(4, "src_h must be int", r);
1202: int dx=params.as_int(5, "dest_x must be int", r);
1203: int dy=params.as_int(6, "dest_y must be int", r);
1204: if(params.count()>1+2+2+2) {
1205: int dw=params.as_int(1+2+2+2, "dest_w must be int", r);
1206: int dh=(int)(params.count()>1+2+2+2+1?
1207: params.as_int(1+2+2+2+1, "dest_h must be int", r):sh*(((double)dw)/((double)sw)));
1208: int tolerance=params.count()>1+2+2+2+2?
1209: params.as_int(1+2+2+2+2, "tolerance must be int", r):150;
1.53 parser 1210:
1.91 paf 1211: src->CopyResampled(*dest, dx, dy, sx, sy, dw, dh, sw, sh, tolerance);
1.53 parser 1212: } else
1.91 paf 1213: src->Copy(*dest, dx, dy, sx, sy, sw, sh);
1.53 parser 1214: }
1215:
1216:
1.22 paf 1217: // constructor
1218:
1.91 paf 1219: MImage::MImage(): Methoded("image") {
1.1 paf 1220: // ^image:measure[DATA]
1.22 paf 1221: add_native_method("measure", Method::CT_DYNAMIC, _measure, 1, 1);
1.3 paf 1222:
1.25 paf 1223: // ^image.html[]
1224: // ^image.html[hash]
1.22 paf 1225: add_native_method("html", Method::CT_DYNAMIC, _html, 0, 1);
1.6 paf 1226:
1.25 paf 1227: // ^image.load[background.gif]
1.22 paf 1228: add_native_method("load", Method::CT_DYNAMIC, _load, 1, 1);
1.6 paf 1229:
1.25 paf 1230: // ^image.create[width;height] bgcolor=white
1231: // ^image.create[width;height;bgcolor]
1.22 paf 1232: add_native_method("create", Method::CT_DYNAMIC, _create, 2, 3);
1.6 paf 1233:
1.25 paf 1234: // ^image.gif[]
1.95 paf 1235: add_native_method("gif", Method::CT_DYNAMIC, _gif, 0, 1);
1.12 paf 1236:
1.25 paf 1237: // ^image.line(x0;y0;x1;y1;color)
1.22 paf 1238: add_native_method("line", Method::CT_DYNAMIC, _line, 5, 5);
1.13 paf 1239:
1.25 paf 1240: // ^image.fill(x;y;color)
1.22 paf 1241: add_native_method("fill", Method::CT_DYNAMIC, _fill, 3, 3);
1.13 paf 1242:
1.25 paf 1243: // ^image.rectangle(x0;y0;x1;y1;color)
1.22 paf 1244: add_native_method("rectangle", Method::CT_DYNAMIC, _rectangle, 5, 5);
1.13 paf 1245:
1.25 paf 1246: // ^image.bar(x0;y0;x1;y1;color)
1.22 paf 1247: add_native_method("bar", Method::CT_DYNAMIC, _bar, 5, 5);
1.13 paf 1248:
1.44 parser 1249: // ^image.replace(color-source;color-dest)[table x:y]
1250: add_native_method("replace", Method::CT_DYNAMIC, _replace, 3, 3);
1251:
1252: // ^image.polyline(color)[table x:y]
1253: add_native_method("polyline", Method::CT_DYNAMIC, _polyline, 2, 2);
1.13 paf 1254:
1.44 parser 1255: // ^image.polygon(color)[table x:y]
1256: add_native_method("polygon", Method::CT_DYNAMIC, _polygon, 2, 2);
1.13 paf 1257:
1.44 parser 1258: // ^image.polybar(color)[table x:y]
1259: add_native_method("polybar", Method::CT_DYNAMIC, _polybar, 2, 2);
1.13 paf 1260:
1.36 parser 1261: // ^image.font[alPHAbet;font-file-name.gif](spacebar_width)
1262: // ^image.font[alPHAbet;font-file-name.gif](spacebar_width;width)
1263: add_native_method("font", Method::CT_DYNAMIC, _font, 3, 4);
1.16 paf 1264:
1.25 paf 1265: // ^image.text(x;y)[text]
1.22 paf 1266: add_native_method("text", Method::CT_DYNAMIC, _text, 3, 3);
1.47 parser 1267:
1268: // ^image.ngth[text]
1269: add_native_method("length", Method::CT_DYNAMIC, _length, 1, 1);
1.16 paf 1270:
1.48 parser 1271: // ^image.arc(center x;center y;width;height;start in degrees;end in degrees;color)
1272: add_native_method("arc", Method::CT_DYNAMIC, _arc, 7, 7);
1.49 parser 1273:
1274: // ^image.sector(center x;center y;width;height;start in degrees;end in degrees;color)
1275: add_native_method("sector", Method::CT_DYNAMIC, _sector, 7, 7);
1.48 parser 1276:
1277: // ^image.circle(center x;center y;r;color)
1278: add_native_method("circle", Method::CT_DYNAMIC, _circle, 4, 4);
1279:
1.56 parser 1280: // ^image.copy[source](src x;src y;src w;src h;dst x;dst y[;dest w[;dest h[;tolerance]]])
1281: add_native_method("copy", Method::CT_DYNAMIC, _copy, 1+2+2+2, (1+2+2+2)+2+1);
1.1 paf 1282: }
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