Annotation of parser3/src/classes/image.C, revision 1.55
1.1 paf 1: /** @file
2: Parser: @b image parser class.
3:
1.16 paf 4: Copyright(c) 2001 ArtLebedev Group(http://www.artlebedev.com)
1.46 parser 5: Author: Alexander Petrosyan <paf@design.ru>(http://design.ru/paf)
1.1 paf 6:
1.55 ! parser 7: $Id: image.C,v 1.54 2001/10/16 08:18:09 parser Exp $
1.31 parser 8: */
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:
1.8 paf 21: #include "gif.h"
1.6 paf 22:
1.1 paf 23: #include "pa_common.h"
24: #include "pa_request.h"
25: #include "pa_vfile.h"
26: #include "pa_vimage.h"
27:
1.22 paf 28: // defines
1.1 paf 29:
1.22 paf 30: #define IMAGE_CLASS_NAME "image"
31:
32: // class
33:
34: class MImage : public Methoded {
35: public: // VStateless_class
36: Value *create_new_value(Pool& pool) { return new(pool) VImage(pool); }
37:
38: public:
39: MImage(Pool& pool);
1.24 paf 40:
41: public: // Methoded
1.22 paf 42: bool used_directly() { return true; }
43:
44: };
1.1 paf 45:
46: // helpers
47:
1.43 parser 48: #ifndef DOXYGEN
1.1 paf 49: class Measure_reader {
50: public:
1.45 parser 51: enum { READ_CHUNK_SIZE=0x400*20 };// 20K
1.16 paf 52: typedef size_t(*Func)(void *& buf, size_t limit, void *info);
1.1 paf 53:
54: Measure_reader(Func afunc, void *ainfo) :
55: func(afunc), info(ainfo),
56: chunk(0), offset(0), size(0) {
57: }
58:
1.31 parser 59: size_t read(void *&buf, size_t limit) {
1.3 paf 60: if(offset+limit>size) // nothing left
61: if(offset==0 || limit==1) { // only one-byte continuations allowed
62: size=(*func)(chunk, READ_CHUNK_SIZE, info);
63: offset=0;
64: } else
1.16 paf 65: return 0;// as if EOF
1.1 paf 66: if(!size) // EOF
67: return 0;
68:
69: // something left
70: size_t read_size=min(offset+limit, size)-offset;
71: buf=((unsigned char *)chunk)+offset;
72: offset+=read_size;
73: return read_size;
74: }
75:
76: private:
77: Func func;
78: void *info;
79:
80: void *chunk;
81: size_t offset;
82: size_t size;
83: };
1.43 parser 84: #endif
1.1 paf 85:
1.21 paf 86: /// GIF file header
1.1 paf 87: struct GIF_Header {
1.16 paf 88: char type[3]; // 'GIF'
1.1 paf 89: char version[3];
90: unsigned char width[2];
91: unsigned char height[2];
92: char dif;
93: char fonColor;
94: char nulls;
95: };
96:
1.31 parser 97: /// JPEG record head
98: struct JPG_Segment_head {
99: unsigned char marker;
100: unsigned char code;
101: unsigned char length[2];
1.1 paf 102: };
1.21 paf 103: /// JPEG frame header
1.31 parser 104: struct JPG_Size_segment_body {
1.27 parser 105: char data; //< data precision of bits/sample
1.31 parser 106: unsigned char height[2]; //< image height
107: unsigned char width[2]; //< image width
1.27 parser 108: char numComponents; //< number of color components
1.1 paf 109: };
110:
111: //
112:
1.33 parser 113: inline short x_endian_to_int(unsigned char L, unsigned char H) {
114: return(short)((H<<8) + L);
115: }
116:
117: inline short big_endian_to_int(unsigned char b[2]) {
118: return x_endian_to_int(b[1], b[0]);
119: }
120:
121: inline short little_endian_to_int(unsigned char b[2]) {
122: return x_endian_to_int(b[0], b[1]);
1.1 paf 123: }
124:
125: void measure_gif(Pool& pool, const String *origin_string,
126: Measure_reader& reader, int& width, int& height) {
127:
1.31 parser 128: void *buf;
1.1 paf 129: const int head_size=sizeof(GIF_Header);
130: if(reader.read(buf, head_size)<head_size)
131: PTHROW(0, 0,
132: origin_string,
1.34 parser 133: "not GIF file - too small");
1.31 parser 134: GIF_Header *head=(GIF_Header *)buf;
1.1 paf 135:
1.31 parser 136: if(strncmp(head->type, "GIF", 3)!=0)
1.1 paf 137: PTHROW(0, 0,
138: origin_string,
1.44 parser 139: "not GIF file - wrong signature");
1.1 paf 140:
1.33 parser 141: width=little_endian_to_int(head->width);
142: height=little_endian_to_int(head->height);
1.1 paf 143: }
144:
145: void measure_jpeg(Pool& pool, const String *origin_string,
146: Measure_reader& reader, int& width, int& height) {
1.2 paf 147: // JFIF format markers
1.31 parser 148: const unsigned char MARKER=0xFF;
1.34 parser 149: const unsigned char CODE_SIZE_FIRST=0xC0;
150: const unsigned char CODE_SIZE_LAST=0xC3;
1.2 paf 151:
1.31 parser 152: void *buf;
1.18 paf 153: const size_t prefix_size=2;
1.31 parser 154: if(reader.read(buf, prefix_size)<prefix_size)
1.1 paf 155: PTHROW(0, 0,
156: origin_string,
1.34 parser 157: "not JPEG file - too small");
1.31 parser 158: unsigned char *signature=(unsigned char *)buf;
1.1 paf 159:
1.31 parser 160: if(!(signature[0]==0xFF && signature[1]==0xD8))
1.1 paf 161: PTHROW(0, 0,
162: origin_string,
1.44 parser 163: "not JPEG file - wrong signature");
1.31 parser 164:
165: bool found=false;
166: while(true) {
167: void *buf;
168: // Extract the segment header.
169: if(reader.read(buf, sizeof(JPG_Segment_head))<sizeof(JPG_Segment_head))
170: break;
171: JPG_Segment_head *head=(JPG_Segment_head *)buf;
172:
173: // Verify that it's a valid segment.
174: if(head->marker!=MARKER)
1.1 paf 175: break;
1.31 parser 176:
1.34 parser 177: if(head->code >= CODE_SIZE_FIRST && head->code <= CODE_SIZE_LAST) {
1.31 parser 178: // Segments that contain size info
179: if(reader.read(buf, sizeof(JPG_Size_segment_body))<sizeof(JPG_Size_segment_body))
180: break;
181: JPG_Size_segment_body *body=(JPG_Size_segment_body *)buf;
182:
1.32 parser 183: width=big_endian_to_int(body->width);
184: height=big_endian_to_int(body->height);
1.31 parser 185: found=true;
1.1 paf 186: break;
1.31 parser 187: } else {
188: // Dummy read to skip over data
1.32 parser 189: size_t limit=big_endian_to_int(head->length) - 2;
1.31 parser 190: if(reader.read(buf, limit)<limit)
191: break;
192: }
193: }
194:
195: if(!found)
1.16 paf 196: PTHROW(0, 0,
197: origin_string,
1.31 parser 198: "broken JPEG file - size frame not found");
1.1 paf 199: }
200:
201: // measure center
202:
203: void measure(Pool& pool, const String& file_name,
204: Measure_reader& reader, int& width, int& height) {
205: if(const char *cext=strrchr(file_name.cstr(), '.')) {
206: cext++;
207: if(strcasecmp(cext, "GIF")==0)
208: measure_gif(pool, &file_name, reader, width, height);
209: else if(strcasecmp(cext, "JPG")==0 || strcasecmp(cext, "JPEG")==0)
210: measure_jpeg(pool, &file_name, reader, width, height);
211: else
212: PTHROW(0, 0,
213: &file_name,
214: "unhandled image file name extension '%s'", cext);
215: } else
216: PTHROW(0, 0,
217: &file_name,
218: "can not determine image type - no file name extension");
219: }
220:
1.40 parser 221: #ifndef DOXYGEN
1.1 paf 222: struct Read_mem_info {
223: unsigned char *ptr;
224: unsigned char *eof;
225: };
1.40 parser 226: #endif
1.1 paf 227: static size_t read_mem(void*& buf, size_t limit, void *info) {
228: Read_mem_info& rmi=*static_cast<Read_mem_info *>(info);
229: buf=rmi.ptr;
230: size_t read_size=min(limit, (size_t)(rmi.eof-rmi.ptr));
231: rmi.ptr+=read_size;
232: return read_size;
233: }
234:
1.40 parser 235: #ifndef DOXYGEN
1.1 paf 236: struct Read_disk_info {
237: const String *file_spec;
238: size_t offset;
239: };
1.40 parser 240: #endif
1.1 paf 241: static size_t read_disk(void*& buf, size_t limit, void *info) {
242: Read_disk_info& rdi=*static_cast<Read_disk_info *>(info);
243: Pool& pool=rdi.file_spec->pool();
244:
245: size_t read_size;
246: file_read(pool, *rdi.file_spec,
247: buf, read_size,
248: false/*as_text*/,
249: true/*fail_on_read_problem*/,
250: rdi.offset, limit);
251:
252: rdi.offset+=read_size;
253: return read_size;
254: }
255:
256: // methods
257:
1.17 paf 258: static void _measure(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 259: Pool& pool=r.pool();
260:
1.30 parser 261: Value& data=params->as_no_junction(0, "data must not be code");
1.1 paf 262:
1.16 paf 263: void *info;Measure_reader::Func read_func;
1.1 paf 264: Read_mem_info read_mem_info;
265: Read_disk_info read_disk_info;
266: const String *file_name;
267: if(data.is_string()) {
268: file_name=data.get_string();
269: read_disk_info.file_spec=&r.absolute(*file_name);
270: read_disk_info.offset=0;
1.16 paf 271: info=&read_disk_info;read_func=read_disk;
1.1 paf 272: } else {
273: const VFile& vfile=*data.as_vfile();
274: file_name=&static_cast<Value *>(vfile.fields().get(*name_name))->as_string();
275: read_mem_info.ptr=(unsigned char *)vfile.value_ptr();
276: read_mem_info.eof=read_mem_info.ptr+vfile.value_size();
1.16 paf 277: info=&read_mem_info;read_func=read_mem;
1.1 paf 278: }
279:
280: Measure_reader reader(read_func, info);
281: int width, height;
282: measure(pool, *file_name, reader, width, height);
283:
1.6 paf 284: static_cast<VImage *>(r.self)->set(file_name, width, height);
1.1 paf 285: }
286:
1.40 parser 287: #ifndef DOXYGEN
1.4 paf 288: struct Attrib_info {
1.21 paf 289: String *tag; ///< html tag being constructed
290: Hash *skip; ///< tag attributes not to append to tag string [to skip]
1.4 paf 291: };
1.40 parser 292: #endif
1.3 paf 293: static void append_attrib_pair(const Hash::Key& key, Hash::Val *val, void *info) {
1.4 paf 294: Attrib_info& ai=*static_cast<Attrib_info *>(info);
295:
1.49 parser 296: // skip user-specified and internal(starting with "line-") attributes
297: if(ai.skip && ai.skip->get(key) || key.pos("line-")==0)
1.4 paf 298: return;
299:
1.3 paf 300: Value& value=*static_cast<Value *>(val);
301: // src="a.gif" width=123 ismap[=-1]
1.4 paf 302: *ai.tag << " " << key;
1.26 parser 303: if(value.is_string() || value.as_int()>=0)
1.6 paf 304: *ai.tag << "=\"" << value.as_string() << "\"";
1.3 paf 305: }
1.17 paf 306: static void _html(Request& r, const String& method_name, MethodParams *params) {
1.3 paf 307: Pool& pool=r.pool();
308:
309: String tag(pool);
310: tag << "<img";
1.4 paf 311:
1.18 paf 312: const Hash& fields=static_cast<VImage *>(r.self)->fields();
1.5 paf 313: Hash *attribs=0;
1.4 paf 314:
1.39 parser 315: if(params->size()) {
1.52 parser 316: Value &vattribs=r.process(params->get(0),
317: 0/*no name*/,
318: false/*don't intercept string*/);
1.39 parser 319: if(vattribs.is_defined()) // allow 'void'
1.49 parser 320: if(attribs=vattribs.get_hash()) {
1.39 parser 321: Attrib_info attrib_info={&tag, 0};
322: attribs->for_each(append_attrib_pair, &attrib_info);
323: } else
324: PTHROW(0, 0,
325: &method_name,
326: "attributes must be hash");
327: }
1.4 paf 328:
1.5 paf 329: Attrib_info attrib_info={&tag, attribs};
1.4 paf 330: fields.for_each(append_attrib_pair, &attrib_info);
1.6 paf 331: tag << " />";
1.3 paf 332: r.write_pass_lang(tag);
333: }
1.8 paf 334:
1.16 paf 335: static gdImage *load(Request& r, const String& method_name,
336: const String& file_name){
337: Pool& pool=r.pool();
338:
1.42 parser 339: const char *file_name_cstr=r.absolute(file_name).cstr(String::UL_FILE_SPEC);
1.16 paf 340: if(FILE *f=fopen(file_name_cstr, "rb")) {
341: gdImage& image=*new(pool) gdImage(pool);
1.23 paf 342: bool ok=image.CreateFromGif(f);
1.16 paf 343: fclose(f);
1.23 paf 344: if(!ok)
345: PTHROW(0, 0,
346: &file_name,
347: "is not in GIF format");
1.16 paf 348: return ℑ
349: } else {
350: PTHROW(0, 0,
351: &method_name,
352: "can not open '%s'", file_name_cstr);
353: return 0;
354: }
355: }
356:
357:
1.17 paf 358: static void _load(Request& r, const String& method_name, MethodParams *params) {
1.6 paf 359: Pool& pool=r.pool();
360:
1.44 parser 361: const String& file_name=params->as_string(0, "file name must not be code");
1.6 paf 362:
1.16 paf 363: gdImage& image=*load(r, method_name, file_name);
364: int width=image.SX();
365: int height=image.SY();
366: static_cast<VImage *>(r.self)->set(&file_name, width, height, &image);
1.6 paf 367: }
368:
1.17 paf 369: static void _create(Request& r, const String& method_name, MethodParams *params) {
1.6 paf 370: Pool& pool=r.pool();
371:
1.51 parser 372: int width=params->as_int(0, "width must be int", r);
373: int height=params->as_int(1, "height must be int", r);
1.8 paf 374: int bgcolor_value=0xffFFff;
1.6 paf 375: if(params->size()>2)
1.51 parser 376: bgcolor_value=params->as_int(2, "color must be int", r);
1.15 paf 377: gdImage& image=*new(pool) gdImage(pool);
378: image.Create(width, height);
379: image.FilledRectangle(0, 0, width-1, height-1, image.Color(bgcolor_value));
380: static_cast<VImage *>(r.self)->set(0, width, height, &image);
1.6 paf 381: }
382:
1.17 paf 383: static void _gif(Request& r, const String& method_name, MethodParams *params) {
1.6 paf 384: Pool& pool=r.pool();
385:
1.9 paf 386: gdImage *image=static_cast<VImage *>(r.self)->image;
1.8 paf 387: if(!image)
1.16 paf 388: PTHROW(0, 0,
389: &method_name,
1.12 paf 390: "does not contain an image");
1.6 paf 391:
392: // could _ but don't thing it's wise to use $image.src for vfile.name
1.10 paf 393:
1.16 paf 394: String out(pool); image->Gif(out);
1.6 paf 395:
396: VFile& vfile=*new(pool) VFile(pool);
1.41 parser 397: Value *content_type=new(pool) VString(*new(pool) String(pool, "image/gif"));
1.20 paf 398: vfile.set(false/*not tainted*/,
1.41 parser 399: out.cstr(String::UL_AS_IS), out.size(), 0, content_type);
1.6 paf 400:
401: r.write_no_lang(vfile);
402: }
403:
1.17 paf 404: static void _line(Request& r, const String& method_name, MethodParams *params) {
1.12 paf 405: Pool& pool=r.pool();
406:
407: gdImage *image=static_cast<VImage *>(r.self)->image;
408: if(!image)
1.16 paf 409: PTHROW(0, 0,
410: &method_name,
1.12 paf 411: "does not contain an image");
412:
413: image->Line(
1.51 parser 414: params->as_int(0, "x0 must be int", r),
415: params->as_int(1, "y0 must be int", r),
416: params->as_int(2, "x1 must be int", r),
417: params->as_int(3, "y1 must be int", r),
418: image->Color(params->as_int(4, "color must be int", r)));
1.13 paf 419: }
420:
1.17 paf 421: static void _fill(Request& r, const String& method_name, MethodParams *params) {
1.13 paf 422: Pool& pool=r.pool();
423:
424: gdImage *image=static_cast<VImage *>(r.self)->image;
425: if(!image)
1.16 paf 426: PTHROW(0, 0,
427: &method_name,
1.13 paf 428: "does not contain an image");
1.12 paf 429:
1.13 paf 430: image->Fill(
1.51 parser 431: params->as_int(0, "x must be int", r),
432: params->as_int(1, "y must be int", r),
433: image->Color(params->as_int(2, "color must be int", r)));
1.13 paf 434: }
435:
1.17 paf 436: static void _rectangle(Request& r, const String& method_name, MethodParams *params) {
1.13 paf 437: Pool& pool=r.pool();
438:
439: gdImage *image=static_cast<VImage *>(r.self)->image;
440: if(!image)
1.16 paf 441: PTHROW(0, 0,
442: &method_name,
1.13 paf 443: "does not contain an image");
444:
445: image->Rectangle(
1.51 parser 446: params->as_int(0, "x0 must be int", r),
447: params->as_int(1, "y0 must be int", r),
448: params->as_int(2, "x1 must be int", r),
449: params->as_int(3, "y1 must be int", r),
450: image->Color(params->as_int(4, "color must be int", r)));
1.13 paf 451: }
452:
1.17 paf 453: static void _bar(Request& r, const String& method_name, MethodParams *params) {
1.13 paf 454: Pool& pool=r.pool();
455:
456: gdImage *image=static_cast<VImage *>(r.self)->image;
457: if(!image)
1.16 paf 458: PTHROW(0, 0,
459: &method_name,
1.13 paf 460: "does not contain an image");
461:
462: image->FilledRectangle(
1.51 parser 463: params->as_int(0, "x0 must be int", r),
464: params->as_int(1, "y0 must be int", r),
465: params->as_int(2, "x1 must be int", r),
466: params->as_int(3, "y1 must be int", r),
467: image->Color(params->as_int(4, "color must be int", r)));
1.13 paf 468: }
469:
1.44 parser 470: #ifndef DOXYGEN
471: static void add_point(Array::Item *value, void *info) {
472: Array& row=*static_cast<Array *>(value);
473: gdImage::Point **p=static_cast<gdImage::Point **>(info);
474:
475: (**p).x=row.get_string(0)->as_int();
476: (**p).y=row.get_string(1)->as_int();
477: (*p)++;
478: }
479: #endif
1.17 paf 480: static void _replace(Request& r, const String& method_name, MethodParams *params) {
1.13 paf 481: Pool& pool=r.pool();
482:
483: gdImage *image=static_cast<VImage *>(r.self)->image;
484: if(!image)
1.16 paf 485: PTHROW(0, 0,
486: &method_name,
1.13 paf 487: "does not contain an image");
488:
1.44 parser 489: Table *table=params->as_no_junction(2, "coordinates must not be code").get_table();
490: if(!table)
491: PTHROW(0, 0,
492: &method_name,
493: "coordinates must be table");
1.13 paf 494:
1.44 parser 495: gdImage::Point *all_p=(gdImage::Point *)pool.malloc(sizeof(gdImage::Point)*table->size());
496: gdImage::Point *add_p=all_p;
497: table->for_each(add_point, &add_p);
498: image->FilledPolygonReplaceColor(all_p, table->size(),
1.51 parser 499: image->Color(params->as_int(0, "src color must be int", r)),
500: image->Color(params->as_int(1, "dest color must be int", r)));
1.13 paf 501: }
502:
1.44 parser 503: static void _polyline(Request& r, const String& method_name, MethodParams *params) {
1.13 paf 504: Pool& pool=r.pool();
505:
506: gdImage *image=static_cast<VImage *>(r.self)->image;
507: if(!image)
1.16 paf 508: PTHROW(0, 0,
509: &method_name,
1.13 paf 510: "does not contain an image");
511:
1.44 parser 512: Table *table=params->as_no_junction(1, "coordinates must not be code").get_table();
513: if(!table)
514: PTHROW(0, 0,
515: &method_name,
516: "coordinates must be table");
517:
518: gdImage::Point *all_p=(gdImage::Point *)pool.malloc(sizeof(gdImage::Point)*table->size());
519: gdImage::Point *add_p=all_p;
520: table->for_each(add_point, &add_p);
521: image->Polygon(all_p, table->size(),
1.51 parser 522: image->Color(params->as_int(0, "color must be int", r)),
1.44 parser 523: false/*not closed*/);
524: }
525:
526: static void _polygon(Request& r, const String& method_name, MethodParams *params) {
527: Pool& pool=r.pool();
528:
529: gdImage *image=static_cast<VImage *>(r.self)->image;
530: if(!image)
1.16 paf 531: PTHROW(0, 0,
532: &method_name,
1.44 parser 533: "does not contain an image");
1.13 paf 534:
1.44 parser 535: Table *table=params->as_no_junction(1, "coordinates must not be code").get_table();
536: if(!table)
537: PTHROW(0, 0,
538: &method_name,
539: "coordinates must be table");
540:
541: gdImage::Point *all_p=(gdImage::Point *)pool.malloc(sizeof(gdImage::Point)*table->size());
542: gdImage::Point *add_p=all_p;
543: table->for_each(add_point, &add_p);
544: image->Polygon(all_p, table->size(),
1.51 parser 545: image->Color(params->as_int(0, "color must be int", r)));
1.13 paf 546: }
547:
1.17 paf 548: static void _polybar(Request& r, const String& method_name, MethodParams *params) {
1.13 paf 549: Pool& pool=r.pool();
550:
551: gdImage *image=static_cast<VImage *>(r.self)->image;
552: if(!image)
1.16 paf 553: PTHROW(0, 0,
554: &method_name,
1.13 paf 555: "does not contain an image");
556:
1.44 parser 557: Table *table=params->as_no_junction(1, "coordinates must not be code").get_table();
558: if(!table)
559: PTHROW(0, 0,
560: &method_name,
561: "coordinates must be table");
1.13 paf 562:
1.44 parser 563: gdImage::Point *all_p=(gdImage::Point *)pool.malloc(sizeof(gdImage::Point)*table->size());
564: gdImage::Point *add_p=all_p;
565: table->for_each(add_point, &add_p);
566: image->FilledPolygon(all_p, table->size(),
1.51 parser 567: image->Color(params->as_int(0, "color must be int", r)));
1.12 paf 568: }
569:
1.16 paf 570: // font
571:
572: #define Y(y)(y+index*height+1)
1.21 paf 573:
574: /// simple gdImage-based font storage & text output
1.16 paf 575: class Font : public Pooled {
576: public:
577:
1.38 parser 578: const static int letter_spacing;
1.35 parser 579: int height; ///< Font heigth
580: int monospace; ///< Default char width
581: int spacebarspace; ///< spacebar width
1.16 paf 582: gdImage& ifont;
583: const String& alphabet;
584:
585: Font(Pool& pool,
586: const String& aalphabet,
1.35 parser 587: gdImage& aifont, int aheight, int amonospace, int aspacebarspace) : Pooled(pool),
1.16 paf 588: alphabet(aalphabet),
1.35 parser 589: height(aheight), monospace(amonospace), spacebarspace(aspacebarspace),
1.16 paf 590: ifont(aifont) {
591: }
592:
593: /* ******************************** char ********************************** */
594:
595: int index_of(char ch) {
596: if(ch==' ') return -1;
597: return alphabet.pos(&ch, 1);
598: }
599:
600: int index_width(int index) {
601: if(index<0)
1.35 parser 602: return spacebarspace;
1.16 paf 603: int tr=ifont.GetTransparent();
1.35 parser 604: for(int x=ifont.SX()-1; x>=0; x--) {
1.16 paf 605: for(int y=0; y<height-1; y++)
606: if(ifont.GetPixel(x, Y(y))!=tr)
1.35 parser 607: return x+1;
1.16 paf 608: }
609: return 0;
610: }
611:
612: void index_display(gdImage& image, int x, int y, int index){
613: if(index>=0)
614: ifont.Copy(image, x, y, 0, Y(0), index_width(index), height-1);
615: }
616:
617: /* ******************************** string ********************************** */
1.47 parser 618:
619: int string_width(const String& s){
620: const char *cstr=s.cstr(String::UL_AS_IS);
1.16 paf 621: int result=0;
622: for(; *cstr; cstr++)
623: result+=index_width(index_of(*cstr));
624: return result;
625: }
626:
627: void string_display(gdImage& image, int x, int y, const String& s){
628: const char *cstr=s.cstr(String::UL_AS_IS);
629: if(cstr) for(; *cstr; cstr++) {
630: int index=index_of(*cstr);
631: index_display(image, x, y, index);
1.38 parser 632: x+=letter_spacing + (monospace ? monospace : index_width(index));
1.16 paf 633: }
634: }
635:
636: };
1.38 parser 637: const int Font::letter_spacing=1;
1.35 parser 638:
1.17 paf 639: static void _font(Request& r, const String& method_name, MethodParams *params) {
1.16 paf 640: Pool& pool=r.pool();
641:
1.37 parser 642: const String& alphabet=params->as_string(0, "alphabet must not be code");
643: gdImage& image=*load(r, method_name, params->as_string(1, "file_name must not be code"));
1.51 parser 644: int spacebar_width=params->as_int(2, "spacebar_width must be int", r);
1.37 parser 645: int monospace_width;
646: if(params->size()>3) {
1.51 parser 647: monospace_width=params->as_int(3, "monospace_width must be int", r);
1.37 parser 648: if(!monospace_width)
649: monospace_width=image.SX();
650: } else
651: monospace_width=0;
1.16 paf 652:
1.37 parser 653: if(!alphabet.size())
654: PTHROW(0, 0,
655: &method_name,
656: "alphabet must not be empty");
657:
1.16 paf 658: static_cast<VImage *>(r.self)->font=new(pool) Font(pool,
1.37 parser 659: alphabet,
1.36 parser 660: image,
1.37 parser 661: image.SY() / alphabet.size(), monospace_width, spacebar_width);
1.16 paf 662: }
663:
1.17 paf 664: static void _text(Request& r, const String& method_name, MethodParams *params) {
1.16 paf 665: Pool& pool=r.pool();
666:
1.51 parser 667: int x=params->as_int(0, "x must be int", r);
668: int y=params->as_int(1, "y must be int", r);
1.36 parser 669: const String& s=params->as_string(2, "text must not be code");
1.16 paf 670:
671: VImage& vimage=*static_cast<VImage *>(r.self);
672: if(vimage.image)
673: if(vimage.font)
674: vimage.font->string_display(*vimage.image, x, y, s);
675: else
676: PTHROW(0, 0,
677: &method_name,
678: "set the font first");
679: else
680: PTHROW(0, 0,
681: &method_name,
682: "does not contain an image");
683: }
684:
1.47 parser 685: static void _length(Request& r, const String& method_name, MethodParams *params) {
686: Pool& pool=r.pool();
687:
688: const String& s=params->as_string(0, "text must not be code");
689:
690: VImage& vimage=*static_cast<VImage *>(r.self);
691: if(vimage.image)
692: if(vimage.font) {
693: VInt& result=*new(pool) VInt(pool, vimage.font->string_width(s));
694: result.set_name(method_name);
695: r.write_assign_lang(result);
696: } else
697: PTHROW(0, 0,
698: &method_name,
699: "set the font first");
700: else
701: PTHROW(0, 0,
702: &method_name,
703: "does not contain an image");
704: }
705:
1.48 parser 706: static void _arc(Request& r, const String& method_name, MethodParams *params) {
707: Pool& pool=r.pool();
708:
709: gdImage *image=static_cast<VImage *>(r.self)->image;
710: if(!image)
711: PTHROW(0, 0,
712: &method_name,
713: "does not contain an image");
714:
715: image->Arc(
1.51 parser 716: params->as_int(0, "center_x must be int", r),
717: params->as_int(1, "center_y must be int", r),
718: params->as_int(2, "width must be int", r),
719: params->as_int(3, "height must be int", r),
720: params->as_int(4, "start degrees must be int", r),
721: params->as_int(5, "end degrees must be int", r),
722: image->Color(params->as_int(6, "cx must be int", r)));
1.48 parser 723: }
724:
1.49 parser 725: static void _sector(Request& r, const String& method_name, MethodParams *params) {
726: Pool& pool=r.pool();
727:
728: gdImage *image=static_cast<VImage *>(r.self)->image;
729: if(!image)
730: PTHROW(0, 0,
731: &method_name,
732: "does not contain an image");
733:
734: image->Sector(
1.51 parser 735: params->as_int(0, "center_x must be int", r),
736: params->as_int(1, "center_y must be int", r),
737: params->as_int(2, "width must be int", r),
738: params->as_int(3, "height must be int", r),
739: params->as_int(4, "start degrees must be int", r),
740: params->as_int(5, "end degrees must be int", r),
741: image->Color(params->as_int(6, "color must be int", r)));
1.49 parser 742: }
743:
1.48 parser 744: static void _circle(Request& r, const String& method_name, MethodParams *params) {
745: Pool& pool=r.pool();
746:
747: gdImage *image=static_cast<VImage *>(r.self)->image;
748: if(!image)
749: PTHROW(0, 0,
750: &method_name,
751: "does not contain an image");
752:
1.51 parser 753: int size=params->as_int(2, "radius must be int", r)*2;
1.48 parser 754: image->Arc(
1.51 parser 755: params->as_int(0, "center_x must be int", r),
756: params->as_int(1, "center_y must be int", r),
1.50 parser 757: size, //w
758: size, //h
1.48 parser 759: 0, //s
760: 360, //e
1.51 parser 761: image->Color(params->as_int(3, "color must be int", r)));
1.48 parser 762: }
763:
1.53 parser 764: gdImage& as_image(Pool& pool, const String& method_name, MethodParams *params,
765: int index, const char *msg) {
766: Value& value=params->as_no_junction(index, msg);
767:
768: if(strcmp(value.type(), VIMAGE_TYPE)!=0)
769: PTHROW(0, 0,
770: &method_name,
771: msg);
772:
773: gdImage *src=static_cast<VImage *>(&value)->image;
774: if(!src)
775: PTHROW(0, 0,
776: &method_name,
777: msg);
778:
779: return *src;
780: }
781:
782: // ^image.copy[source](src x;src y;src w;src h;dst x;dst y[;dest w[;dest h]])
783: static void _copy(Request& r, const String& method_name, MethodParams *params) {
784: Pool& pool=r.pool();
785:
786: gdImage *dest=static_cast<VImage *>(r.self)->image;
787: if(!dest)
788: PTHROW(0, 0,
789: &method_name,
790: "self does not contain an image");
791:
792: gdImage& src=as_image(pool, method_name, params, 0, "src must be image");
793:
794: int sx=params->as_int(1, "src_x must be int", r);
795: int sy=params->as_int(2, "src_y must be int", r);
796: int sw=params->as_int(3, "src_w must be int", r);
797: int sh=params->as_int(4, "src_h must be int", r);
798: int dx=params->as_int(5, "dest_x must be int", r);
799: int dy=params->as_int(6, "dest_y must be int", r);
800: if(params->size()>1+2+2+2) {
801: int dw=params->as_int(1+2+2+2, "dest_w must be int", r);
802: int dh=params->size()>1+2+2+2+1?params->as_int(1+2+2+2+1, "dest_h must be int", r):dw;
803:
1.55 ! parser 804: src.CopyResampled(*dest, dx, dy, sx, sy, dw, dh, sw, sh);
1.53 parser 805: } else
1.54 parser 806: src.Copy(*dest, dx, dy, sx, sy, sw, sh);
1.53 parser 807: }
808:
809:
1.22 paf 810: // constructor
811:
812: MImage::MImage(Pool& apool) : Methoded(apool) {
813: set_name(*NEW String(pool(), IMAGE_CLASS_NAME));
814:
815:
1.1 paf 816: // ^image:measure[DATA]
1.22 paf 817: add_native_method("measure", Method::CT_DYNAMIC, _measure, 1, 1);
1.3 paf 818:
1.25 paf 819: // ^image.html[]
820: // ^image.html[hash]
1.22 paf 821: add_native_method("html", Method::CT_DYNAMIC, _html, 0, 1);
1.6 paf 822:
1.25 paf 823: // ^image.load[background.gif]
1.22 paf 824: add_native_method("load", Method::CT_DYNAMIC, _load, 1, 1);
1.6 paf 825:
1.25 paf 826: // ^image.create[width;height] bgcolor=white
827: // ^image.create[width;height;bgcolor]
1.22 paf 828: add_native_method("create", Method::CT_DYNAMIC, _create, 2, 3);
1.6 paf 829:
1.25 paf 830: // ^image.gif[]
1.22 paf 831: add_native_method("gif", Method::CT_DYNAMIC, _gif, 0, 0);
1.12 paf 832:
1.25 paf 833: // ^image.line(x0;y0;x1;y1;color)
1.22 paf 834: add_native_method("line", Method::CT_DYNAMIC, _line, 5, 5);
1.13 paf 835:
1.25 paf 836: // ^image.fill(x;y;color)
1.22 paf 837: add_native_method("fill", Method::CT_DYNAMIC, _fill, 3, 3);
1.13 paf 838:
1.25 paf 839: // ^image.rectangle(x0;y0;x1;y1;color)
1.22 paf 840: add_native_method("rectangle", Method::CT_DYNAMIC, _rectangle, 5, 5);
1.13 paf 841:
1.25 paf 842: // ^image.bar(x0;y0;x1;y1;color)
1.22 paf 843: add_native_method("bar", Method::CT_DYNAMIC, _bar, 5, 5);
1.13 paf 844:
1.44 parser 845: // ^image.replace(color-source;color-dest)[table x:y]
846: add_native_method("replace", Method::CT_DYNAMIC, _replace, 3, 3);
847:
848: // ^image.polyline(color)[table x:y]
849: add_native_method("polyline", Method::CT_DYNAMIC, _polyline, 2, 2);
1.13 paf 850:
1.44 parser 851: // ^image.polygon(color)[table x:y]
852: add_native_method("polygon", Method::CT_DYNAMIC, _polygon, 2, 2);
1.13 paf 853:
1.44 parser 854: // ^image.polybar(color)[table x:y]
855: add_native_method("polybar", Method::CT_DYNAMIC, _polybar, 2, 2);
1.13 paf 856:
1.36 parser 857: // ^image.font[alPHAbet;font-file-name.gif](spacebar_width)
858: // ^image.font[alPHAbet;font-file-name.gif](spacebar_width;width)
859: add_native_method("font", Method::CT_DYNAMIC, _font, 3, 4);
1.16 paf 860:
1.25 paf 861: // ^image.text(x;y)[text]
1.22 paf 862: add_native_method("text", Method::CT_DYNAMIC, _text, 3, 3);
1.47 parser 863:
864: // ^image.ngth[text]
865: add_native_method("length", Method::CT_DYNAMIC, _length, 1, 1);
1.16 paf 866:
1.48 parser 867: // ^image.arc(center x;center y;width;height;start in degrees;end in degrees;color)
868: add_native_method("arc", Method::CT_DYNAMIC, _arc, 7, 7);
1.49 parser 869:
870: // ^image.sector(center x;center y;width;height;start in degrees;end in degrees;color)
871: add_native_method("sector", Method::CT_DYNAMIC, _sector, 7, 7);
1.48 parser 872:
873: // ^image.circle(center x;center y;r;color)
874: add_native_method("circle", Method::CT_DYNAMIC, _circle, 4, 4);
875:
1.53 parser 876: // ^image.copy[source](src x;src y;src w;src h;dst x;dst y[;dest w[;dest h]])
877: add_native_method("copy", Method::CT_DYNAMIC, _copy, 1+2+2+2, (1+2+2+2)+2);
1.22 paf 878: }
879:
880: // global variable
881:
882: Methoded *image_class;
883:
884: // creator
885:
886: Methoded *MImage_create(Pool& pool) {
887: return image_class=new(pool) MImage(pool);
1.1 paf 888: }
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