Annotation of parser3/src/classes/image.C, revision 1.41
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)
1.1 paf 5:
1.16 paf 6: Author: Alexander Petrosyan <paf@design.ru>(http://design.ru/paf)
1.1 paf 7:
1.41 ! parser 8: $Id: image.C,v 1.40 2001/09/06 06:11:13 parser Exp $
1.31 parser 9: */
1.41 ! parser 10: static const char *RCSId="$Id: image.C,v 1.40 2001/09/06 06:11:13 parser Exp $";
1.31 parser 11:
12: /*
13: jpegsize: gets the width and height (in pixels) of a jpeg file
14: Andrew Tong, werdna@ugcs.caltech.edu February 14, 1995
15: modified slightly by alex@ed.ac.uk
16: and further still by rjray@uswest.com
17: optimization and general re-write from tmetro@vl.com
18: from perl by paf@design.ru
1.1 paf 19: */
20:
21: #include "pa_config_includes.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"
29:
1.22 paf 30: // defines
1.1 paf 31:
1.22 paf 32: #define IMAGE_CLASS_NAME "image"
33:
34: // class
35:
36: class MImage : public Methoded {
37: public: // VStateless_class
38: Value *create_new_value(Pool& pool) { return new(pool) VImage(pool); }
39:
40: public:
41: MImage(Pool& pool);
1.24 paf 42:
43: public: // Methoded
1.22 paf 44: bool used_directly() { return true; }
45:
46: };
1.1 paf 47:
48: // helpers
49:
1.21 paf 50: /// simple buffered reader[from memory/file], used in _measure
1.1 paf 51: class Measure_reader {
52: public:
1.31 parser 53: enum { READ_CHUNK_SIZE=0x400*10 };// 10K
1.16 paf 54: typedef size_t(*Func)(void *& buf, size_t limit, void *info);
1.1 paf 55:
56: Measure_reader(Func afunc, void *ainfo) :
57: func(afunc), info(ainfo),
58: chunk(0), offset(0), size(0) {
59: }
60:
1.31 parser 61: size_t read(void *&buf, size_t limit) {
1.3 paf 62: if(offset+limit>size) // nothing left
63: if(offset==0 || limit==1) { // only one-byte continuations allowed
64: size=(*func)(chunk, READ_CHUNK_SIZE, info);
65: offset=0;
66: } else
1.16 paf 67: return 0;// as if EOF
1.1 paf 68: if(!size) // EOF
69: return 0;
70:
71: // something left
72: size_t read_size=min(offset+limit, size)-offset;
73: buf=((unsigned char *)chunk)+offset;
74: offset+=read_size;
75: return read_size;
76: }
77:
78: private:
79: Func func;
80: void *info;
81:
82: void *chunk;
83: size_t offset;
84: size_t size;
85: };
86:
1.21 paf 87: /// GIF file header
1.1 paf 88: struct GIF_Header {
1.16 paf 89: char type[3]; // 'GIF'
1.1 paf 90: char version[3];
91: unsigned char width[2];
92: unsigned char height[2];
93: char dif;
94: char fonColor;
95: char nulls;
96: };
97:
1.31 parser 98: /// JPEG record head
99: struct JPG_Segment_head {
100: unsigned char marker;
101: unsigned char code;
102: unsigned char length[2];
1.1 paf 103: };
1.21 paf 104: /// JPEG frame header
1.31 parser 105: struct JPG_Size_segment_body {
1.27 parser 106: char data; //< data precision of bits/sample
1.31 parser 107: unsigned char height[2]; //< image height
108: unsigned char width[2]; //< image width
1.27 parser 109: char numComponents; //< number of color components
1.1 paf 110: };
111:
112: //
113:
1.33 parser 114: inline short x_endian_to_int(unsigned char L, unsigned char H) {
115: return(short)((H<<8) + L);
116: }
117:
118: inline short big_endian_to_int(unsigned char b[2]) {
119: return x_endian_to_int(b[1], b[0]);
120: }
121:
122: inline short little_endian_to_int(unsigned char b[2]) {
123: return x_endian_to_int(b[0], b[1]);
1.1 paf 124: }
125:
126: void measure_gif(Pool& pool, const String *origin_string,
127: Measure_reader& reader, int& width, int& height) {
128:
1.31 parser 129: void *buf;
1.1 paf 130: const int head_size=sizeof(GIF_Header);
131: if(reader.read(buf, head_size)<head_size)
132: PTHROW(0, 0,
133: origin_string,
1.34 parser 134: "not GIF file - too small");
1.31 parser 135: GIF_Header *head=(GIF_Header *)buf;
1.1 paf 136:
1.31 parser 137: if(strncmp(head->type, "GIF", 3)!=0)
1.1 paf 138: PTHROW(0, 0,
139: origin_string,
1.34 parser 140: "not GIF file - signature not found");
1.1 paf 141:
1.33 parser 142: width=little_endian_to_int(head->width);
143: height=little_endian_to_int(head->height);
1.1 paf 144: }
145:
146: void measure_jpeg(Pool& pool, const String *origin_string,
147: Measure_reader& reader, int& width, int& height) {
1.2 paf 148: // JFIF format markers
1.31 parser 149: const unsigned char MARKER=0xFF;
1.34 parser 150: const unsigned char CODE_SIZE_FIRST=0xC0;
151: const unsigned char CODE_SIZE_LAST=0xC3;
1.2 paf 152:
1.31 parser 153: void *buf;
1.18 paf 154: const size_t prefix_size=2;
1.31 parser 155: if(reader.read(buf, prefix_size)<prefix_size)
1.1 paf 156: PTHROW(0, 0,
157: origin_string,
1.34 parser 158: "not JPEG file - too small");
1.31 parser 159: unsigned char *signature=(unsigned char *)buf;
1.1 paf 160:
1.31 parser 161: if(!(signature[0]==0xFF && signature[1]==0xD8))
1.1 paf 162: PTHROW(0, 0,
163: origin_string,
1.34 parser 164: "not JPEG file - signature not found");
1.31 parser 165:
166: bool found=false;
167: while(true) {
168: void *buf;
169: // Extract the segment header.
170: if(reader.read(buf, sizeof(JPG_Segment_head))<sizeof(JPG_Segment_head))
171: break;
172: JPG_Segment_head *head=(JPG_Segment_head *)buf;
173:
174: // Verify that it's a valid segment.
175: if(head->marker!=MARKER)
1.1 paf 176: break;
1.31 parser 177:
1.34 parser 178: if(head->code >= CODE_SIZE_FIRST && head->code <= CODE_SIZE_LAST) {
1.31 parser 179: // Segments that contain size info
180: if(reader.read(buf, sizeof(JPG_Size_segment_body))<sizeof(JPG_Size_segment_body))
181: break;
182: JPG_Size_segment_body *body=(JPG_Size_segment_body *)buf;
183:
1.32 parser 184: width=big_endian_to_int(body->width);
185: height=big_endian_to_int(body->height);
1.31 parser 186: found=true;
1.1 paf 187: break;
1.31 parser 188: } else {
189: // Dummy read to skip over data
1.32 parser 190: size_t limit=big_endian_to_int(head->length) - 2;
1.31 parser 191: if(reader.read(buf, limit)<limit)
192: break;
193: }
194: }
195:
196: if(!found)
1.16 paf 197: PTHROW(0, 0,
198: origin_string,
1.31 parser 199: "broken JPEG file - size frame not found");
1.1 paf 200: }
201:
202: // measure center
203:
204: void measure(Pool& pool, const String& file_name,
205: Measure_reader& reader, int& width, int& height) {
206: if(const char *cext=strrchr(file_name.cstr(), '.')) {
207: cext++;
208: if(strcasecmp(cext, "GIF")==0)
209: measure_gif(pool, &file_name, reader, width, height);
210: else if(strcasecmp(cext, "JPG")==0 || strcasecmp(cext, "JPEG")==0)
211: measure_jpeg(pool, &file_name, reader, width, height);
212: else
213: PTHROW(0, 0,
214: &file_name,
215: "unhandled image file name extension '%s'", cext);
216: } else
217: PTHROW(0, 0,
218: &file_name,
219: "can not determine image type - no file name extension");
220: }
221:
1.40 parser 222: #ifndef DOXYGEN
1.1 paf 223: struct Read_mem_info {
224: unsigned char *ptr;
225: unsigned char *eof;
226: };
1.40 parser 227: #endif
1.1 paf 228: static size_t read_mem(void*& buf, size_t limit, void *info) {
229: Read_mem_info& rmi=*static_cast<Read_mem_info *>(info);
230: buf=rmi.ptr;
231: size_t read_size=min(limit, (size_t)(rmi.eof-rmi.ptr));
232: rmi.ptr+=read_size;
233: return read_size;
234: }
235:
1.40 parser 236: #ifndef DOXYGEN
1.1 paf 237: struct Read_disk_info {
238: const String *file_spec;
239: size_t offset;
240: };
1.40 parser 241: #endif
1.1 paf 242: static size_t read_disk(void*& buf, size_t limit, void *info) {
243: Read_disk_info& rdi=*static_cast<Read_disk_info *>(info);
244: Pool& pool=rdi.file_spec->pool();
245:
246: size_t read_size;
247: file_read(pool, *rdi.file_spec,
248: buf, read_size,
249: false/*as_text*/,
250: true/*fail_on_read_problem*/,
251: rdi.offset, limit);
252:
253: rdi.offset+=read_size;
254: return read_size;
255: }
256:
257: // methods
258:
1.17 paf 259: static void _measure(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 260: Pool& pool=r.pool();
261:
1.30 parser 262: Value& data=params->as_no_junction(0, "data must not be code");
1.1 paf 263:
1.16 paf 264: void *info;Measure_reader::Func read_func;
1.1 paf 265: Read_mem_info read_mem_info;
266: Read_disk_info read_disk_info;
267: const String *file_name;
268: if(data.is_string()) {
269: file_name=data.get_string();
270: read_disk_info.file_spec=&r.absolute(*file_name);
271: read_disk_info.offset=0;
1.16 paf 272: info=&read_disk_info;read_func=read_disk;
1.1 paf 273: } else {
274: const VFile& vfile=*data.as_vfile();
275: file_name=&static_cast<Value *>(vfile.fields().get(*name_name))->as_string();
276: read_mem_info.ptr=(unsigned char *)vfile.value_ptr();
277: read_mem_info.eof=read_mem_info.ptr+vfile.value_size();
1.16 paf 278: info=&read_mem_info;read_func=read_mem;
1.1 paf 279: }
280:
281: Measure_reader reader(read_func, info);
282: int width, height;
283: measure(pool, *file_name, reader, width, height);
284:
1.6 paf 285: static_cast<VImage *>(r.self)->set(file_name, width, height);
1.1 paf 286: }
287:
1.40 parser 288: #ifndef DOXYGEN
1.4 paf 289: struct Attrib_info {
1.21 paf 290: String *tag; ///< html tag being constructed
291: Hash *skip; ///< tag attributes not to append to tag string [to skip]
1.4 paf 292: };
1.40 parser 293: #endif
1.3 paf 294: static void append_attrib_pair(const Hash::Key& key, Hash::Val *val, void *info) {
1.4 paf 295: Attrib_info& ai=*static_cast<Attrib_info *>(info);
296:
297: if(ai.skip && ai.skip->get(key))
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()) {
316: Value &vattribs=params->get(0);
317: if(vattribs.is_defined()) // allow 'void'
318: if(Hash *attribs=vattribs.get_hash()) {
319: Attrib_info attrib_info={&tag, 0};
320: attribs->for_each(append_attrib_pair, &attrib_info);
321: } else
322: PTHROW(0, 0,
323: &method_name,
324: "attributes must be hash");
325: }
1.4 paf 326:
1.5 paf 327: Attrib_info attrib_info={&tag, attribs};
1.4 paf 328: fields.for_each(append_attrib_pair, &attrib_info);
1.6 paf 329: tag << " />";
1.3 paf 330: r.write_pass_lang(tag);
331: }
1.8 paf 332:
1.16 paf 333: static gdImage *load(Request& r, const String& method_name,
334: const String& file_name){
335: Pool& pool=r.pool();
336:
337: const char *file_name_cstr=r.absolute(file_name).cstr(String::UL_FILE_NAME);
338: if(FILE *f=fopen(file_name_cstr, "rb")) {
339: gdImage& image=*new(pool) gdImage(pool);
1.23 paf 340: bool ok=image.CreateFromGif(f);
1.16 paf 341: fclose(f);
1.23 paf 342: if(!ok)
343: PTHROW(0, 0,
344: &file_name,
345: "is not in GIF format");
1.16 paf 346: return ℑ
347: } else {
348: PTHROW(0, 0,
349: &method_name,
350: "can not open '%s'", file_name_cstr);
351: return 0;
352: }
353: }
354:
355:
1.17 paf 356: static void _load(Request& r, const String& method_name, MethodParams *params) {
1.6 paf 357: Pool& pool=r.pool();
358:
1.30 parser 359: Value& vfile_name=params->as_no_junction(0, "file name must not be code");
1.6 paf 360: const String& file_name=vfile_name.as_string();
361:
1.16 paf 362: gdImage& image=*load(r, method_name, file_name);
363: int width=image.SX();
364: int height=image.SY();
365: static_cast<VImage *>(r.self)->set(&file_name, width, height, &image);
1.6 paf 366: }
367:
1.17 paf 368: static void _create(Request& r, const String& method_name, MethodParams *params) {
1.6 paf 369: Pool& pool=r.pool();
370:
1.36 parser 371: int width=params->as_int(0, r);
372: int height=params->as_int(1, r);
1.8 paf 373: int bgcolor_value=0xffFFff;
1.6 paf 374: if(params->size()>2)
1.36 parser 375: bgcolor_value=params->as_int(2, r);
1.15 paf 376: gdImage& image=*new(pool) gdImage(pool);
377: image.Create(width, height);
378: image.FilledRectangle(0, 0, width-1, height-1, image.Color(bgcolor_value));
379: static_cast<VImage *>(r.self)->set(0, width, height, &image);
1.6 paf 380: }
381:
1.17 paf 382: static void _gif(Request& r, const String& method_name, MethodParams *params) {
1.6 paf 383: Pool& pool=r.pool();
384:
1.9 paf 385: gdImage *image=static_cast<VImage *>(r.self)->image;
1.8 paf 386: if(!image)
1.16 paf 387: PTHROW(0, 0,
388: &method_name,
1.12 paf 389: "does not contain an image");
1.6 paf 390:
391: // could _ but don't thing it's wise to use $image.src for vfile.name
1.10 paf 392:
1.16 paf 393: String out(pool); image->Gif(out);
1.6 paf 394:
395: VFile& vfile=*new(pool) VFile(pool);
1.41 ! parser 396: Value *content_type=new(pool) VString(*new(pool) String(pool, "image/gif"));
1.20 paf 397: vfile.set(false/*not tainted*/,
1.41 ! parser 398: out.cstr(String::UL_AS_IS), out.size(), 0, content_type);
1.6 paf 399:
400: r.write_no_lang(vfile);
401: }
402:
1.17 paf 403: static void _line(Request& r, const String& method_name, MethodParams *params) {
1.12 paf 404: Pool& pool=r.pool();
405:
406: gdImage *image=static_cast<VImage *>(r.self)->image;
407: if(!image)
1.16 paf 408: PTHROW(0, 0,
409: &method_name,
1.12 paf 410: "does not contain an image");
411:
412: image->Line(
1.36 parser 413: params->as_int(0, r),
414: params->as_int(1, r),
415: params->as_int(2, r),
416: params->as_int(3, r),
417: image->Color(params->as_int(4, r)));
1.13 paf 418: }
419:
1.17 paf 420: static void _fill(Request& r, const String& method_name, MethodParams *params) {
1.13 paf 421: Pool& pool=r.pool();
422:
423: gdImage *image=static_cast<VImage *>(r.self)->image;
424: if(!image)
1.16 paf 425: PTHROW(0, 0,
426: &method_name,
1.13 paf 427: "does not contain an image");
1.12 paf 428:
1.13 paf 429: image->Fill(
1.36 parser 430: params->as_int(0, r),
431: params->as_int(1, r),
432: image->Color(params->as_int(2, r)));
1.13 paf 433: }
434:
1.17 paf 435: static void _rectangle(Request& r, const String& method_name, MethodParams *params) {
1.13 paf 436: Pool& pool=r.pool();
437:
438: gdImage *image=static_cast<VImage *>(r.self)->image;
439: if(!image)
1.16 paf 440: PTHROW(0, 0,
441: &method_name,
1.13 paf 442: "does not contain an image");
443:
444: image->Rectangle(
1.36 parser 445: params->as_int(0, r),
446: params->as_int(1, r),
447: params->as_int(2, r),
448: params->as_int(3, r),
449: image->Color(params->as_int(4, r)));
1.13 paf 450: }
451:
1.17 paf 452: static void _bar(Request& r, const String& method_name, MethodParams *params) {
1.13 paf 453: Pool& pool=r.pool();
454:
455: gdImage *image=static_cast<VImage *>(r.self)->image;
456: if(!image)
1.16 paf 457: PTHROW(0, 0,
458: &method_name,
1.13 paf 459: "does not contain an image");
460:
461: image->FilledRectangle(
1.36 parser 462: params->as_int(0, r),
463: params->as_int(1, r),
464: params->as_int(2, r),
465: params->as_int(3, r),
466: image->Color(params->as_int(4, r)));
1.13 paf 467: }
468:
1.17 paf 469: static void _replace(Request& r, const String& method_name, MethodParams *params) {
1.13 paf 470: Pool& pool=r.pool();
471:
472: gdImage *image=static_cast<VImage *>(r.self)->image;
473: if(!image)
1.16 paf 474: PTHROW(0, 0,
475: &method_name,
1.13 paf 476: "does not contain an image");
477:
478: if((params->size()-2)%2) // I see your thoughts, but that's more readable
1.16 paf 479: PTHROW(0, 0,
480: &method_name,
1.13 paf 481: "y coordinate missing");
482:
483: int n=(params->size()-2)/2;
484:
485: gdImage::Point *p=(gdImage::Point *)pool.malloc(sizeof(gdImage::Point)*n);
486: for(int i=0; i<n; i++) {
1.36 parser 487: p[i].x=params->as_int(2+i*2+0, r);
488: p[i].y=params->as_int(2+i*2+1, r);
1.13 paf 489: }
1.16 paf 490: image->FilledPolygonReplaceColor(p, n,
1.36 parser 491: image->Color(params->as_int(0, r)), // src color
492: image->Color(params->as_int(1, r)));// dest color
1.13 paf 493: }
494:
1.17 paf 495: static void _polygon(Request& r, const String& method_name, MethodParams *params) {
1.13 paf 496: Pool& pool=r.pool();
497:
498: gdImage *image=static_cast<VImage *>(r.self)->image;
499: if(!image)
1.16 paf 500: PTHROW(0, 0,
501: &method_name,
1.13 paf 502: "does not contain an image");
503:
504: if((params->size()-1)%2) // [I see..] see now?
1.16 paf 505: PTHROW(0, 0,
506: &method_name,
1.13 paf 507: "y coordinate missing");
508:
509: int n=(params->size()-1)/2;
510:
511: gdImage::Point *p=(gdImage::Point *)pool.malloc(sizeof(gdImage::Point)*n);
512: for(int i=0; i<n; i++) {
1.36 parser 513: p[i].x=params->as_int(2+i*2+0, r);
514: p[i].y=params->as_int(2+i*2+1, r);
1.13 paf 515: }
1.16 paf 516: image->Polygon(p, n,
1.36 parser 517: image->Color(params->as_int(0, r)));
1.13 paf 518: }
519:
1.17 paf 520: static void _polybar(Request& r, const String& method_name, MethodParams *params) {
1.13 paf 521: Pool& pool=r.pool();
522:
523: gdImage *image=static_cast<VImage *>(r.self)->image;
524: if(!image)
1.16 paf 525: PTHROW(0, 0,
526: &method_name,
1.13 paf 527: "does not contain an image");
528:
529: if((params->size()-1)%2) // [I see..] see now?
1.16 paf 530: PTHROW(0, 0,
531: &method_name,
1.13 paf 532: "y coordinate missing");
533:
534: int n=(params->size()-1)/2;
535:
536: gdImage::Point *p=(gdImage::Point *)pool.malloc(sizeof(gdImage::Point)*n);
537: for(int i=0; i<n; i++) {
1.36 parser 538: p[i].x=params->as_int(2+i*2+0, r);
539: p[i].y=params->as_int(2+i*2+1, r);
1.13 paf 540: }
1.16 paf 541: image->FilledPolygon(p, n,
1.36 parser 542: image->Color(params->as_int(0, r)));
1.12 paf 543: }
544:
1.16 paf 545: // font
546:
547: #define Y(y)(y+index*height+1)
1.21 paf 548:
549: /// simple gdImage-based font storage & text output
1.16 paf 550: class Font : public Pooled {
551: public:
552:
1.38 parser 553: const static int letter_spacing;
1.35 parser 554: int height; ///< Font heigth
555: int monospace; ///< Default char width
556: int spacebarspace; ///< spacebar width
1.16 paf 557: gdImage& ifont;
558: const String& alphabet;
559:
560: Font(Pool& pool,
561: const String& aalphabet,
1.35 parser 562: gdImage& aifont, int aheight, int amonospace, int aspacebarspace) : Pooled(pool),
1.16 paf 563: alphabet(aalphabet),
1.35 parser 564: height(aheight), monospace(amonospace), spacebarspace(aspacebarspace),
1.16 paf 565: ifont(aifont) {
566: }
567:
568: /* ******************************** char ********************************** */
569:
570: int index_of(char ch) {
571: if(ch==' ') return -1;
572: return alphabet.pos(&ch, 1);
573: }
574:
575: int index_width(int index) {
576: if(index<0)
1.35 parser 577: return spacebarspace;
1.16 paf 578: int tr=ifont.GetTransparent();
1.35 parser 579: for(int x=ifont.SX()-1; x>=0; x--) {
1.16 paf 580: for(int y=0; y<height-1; y++)
581: if(ifont.GetPixel(x, Y(y))!=tr)
1.35 parser 582: return x+1;
1.16 paf 583: }
584: return 0;
585: }
586:
587: void index_display(gdImage& image, int x, int y, int index){
588: if(index>=0)
589: ifont.Copy(image, x, y, 0, Y(0), index_width(index), height-1);
590: }
591:
592: /* ******************************** string ********************************** */
593: /*
594: int string_width(const char *cstr){
595: int result=0;
596: for(; *cstr; cstr++)
597: result+=index_width(index_of(*cstr));
598: return result;
599: }
600: */
601:
602: void string_display(gdImage& image, int x, int y, const String& s){
603: const char *cstr=s.cstr(String::UL_AS_IS);
604: if(cstr) for(; *cstr; cstr++) {
605: int index=index_of(*cstr);
606: index_display(image, x, y, index);
1.38 parser 607: x+=letter_spacing + (monospace ? monospace : index_width(index));
1.16 paf 608: }
609: }
610:
611: };
1.38 parser 612: const int Font::letter_spacing=1;
1.35 parser 613:
1.17 paf 614: static void _font(Request& r, const String& method_name, MethodParams *params) {
1.16 paf 615: Pool& pool=r.pool();
616:
1.37 parser 617: const String& alphabet=params->as_string(0, "alphabet must not be code");
618: gdImage& image=*load(r, method_name, params->as_string(1, "file_name must not be code"));
1.36 parser 619: int spacebar_width=params->as_int(2, r);
1.37 parser 620: int monospace_width;
621: if(params->size()>3) {
622: monospace_width=params->as_int(3, r);
623: if(!monospace_width)
624: monospace_width=image.SX();
625: } else
626: monospace_width=0;
1.16 paf 627:
1.37 parser 628: if(!alphabet.size())
629: PTHROW(0, 0,
630: &method_name,
631: "alphabet must not be empty");
632:
1.16 paf 633: static_cast<VImage *>(r.self)->font=new(pool) Font(pool,
1.37 parser 634: alphabet,
1.36 parser 635: image,
1.37 parser 636: image.SY() / alphabet.size(), monospace_width, spacebar_width);
1.16 paf 637: }
638:
1.17 paf 639: static void _text(Request& r, const String& method_name, MethodParams *params) {
1.16 paf 640: Pool& pool=r.pool();
641:
1.36 parser 642: int x=params->as_int(0, r);
643: int y=params->as_int(1, r);
644: const String& s=params->as_string(2, "text must not be code");
1.16 paf 645:
646: VImage& vimage=*static_cast<VImage *>(r.self);
647: if(vimage.image)
648: if(vimage.font)
649: vimage.font->string_display(*vimage.image, x, y, s);
650: else
651: PTHROW(0, 0,
652: &method_name,
653: "set the font first");
654: else
655: PTHROW(0, 0,
656: &method_name,
657: "does not contain an image");
658: }
659:
1.22 paf 660: // constructor
661:
662: MImage::MImage(Pool& apool) : Methoded(apool) {
663: set_name(*NEW String(pool(), IMAGE_CLASS_NAME));
664:
665:
1.1 paf 666: // ^image:measure[DATA]
1.22 paf 667: add_native_method("measure", Method::CT_DYNAMIC, _measure, 1, 1);
1.3 paf 668:
1.25 paf 669: // ^image.html[]
670: // ^image.html[hash]
1.22 paf 671: add_native_method("html", Method::CT_DYNAMIC, _html, 0, 1);
1.6 paf 672:
1.25 paf 673: // ^image.load[background.gif]
1.22 paf 674: add_native_method("load", Method::CT_DYNAMIC, _load, 1, 1);
1.6 paf 675:
1.25 paf 676: // ^image.create[width;height] bgcolor=white
677: // ^image.create[width;height;bgcolor]
1.22 paf 678: add_native_method("create", Method::CT_DYNAMIC, _create, 2, 3);
1.6 paf 679:
1.25 paf 680: // ^image.gif[]
1.22 paf 681: add_native_method("gif", Method::CT_DYNAMIC, _gif, 0, 0);
1.12 paf 682:
1.25 paf 683: // ^image.line(x0;y0;x1;y1;color)
1.22 paf 684: add_native_method("line", Method::CT_DYNAMIC, _line, 5, 5);
1.13 paf 685:
1.25 paf 686: // ^image.fill(x;y;color)
1.22 paf 687: add_native_method("fill", Method::CT_DYNAMIC, _fill, 3, 3);
1.13 paf 688:
1.25 paf 689: // ^image.rectangle(x0;y0;x1;y1;color)
1.22 paf 690: add_native_method("rectangle", Method::CT_DYNAMIC, _rectangle, 5, 5);
1.13 paf 691:
1.25 paf 692: // ^image.bar(x0;y0;x1;y1;color)
1.22 paf 693: add_native_method("bar", Method::CT_DYNAMIC, _bar, 5, 5);
1.13 paf 694:
1.25 paf 695: // ^image.replace(color-source;color-dest)(x;y)... point coord pairs
1.22 paf 696: add_native_method("replace", Method::CT_DYNAMIC, _replace, 2+3*2, 2+100*2);
1.13 paf 697:
1.25 paf 698: // ^image.polygon(color)(x;y)... point coord pairs
1.22 paf 699: add_native_method("polygon", Method::CT_DYNAMIC, _polygon, 1+3*2, 1+100*2);
1.13 paf 700:
1.25 paf 701: // ^image.polybar(color)(x;y)... point coord pairs
1.22 paf 702: add_native_method("polybar", Method::CT_DYNAMIC, _polybar, 1+3*2, 1+100*2);
1.13 paf 703:
1.36 parser 704: // ^image.font[alPHAbet;font-file-name.gif](spacebar_width)
705: // ^image.font[alPHAbet;font-file-name.gif](spacebar_width;width)
706: add_native_method("font", Method::CT_DYNAMIC, _font, 3, 4);
1.16 paf 707:
1.25 paf 708: // ^image.text(x;y)[text]
1.22 paf 709: add_native_method("text", Method::CT_DYNAMIC, _text, 3, 3);
1.16 paf 710:
1.22 paf 711: }
712:
713: // global variable
714:
715: Methoded *image_class;
716:
717: // creator
718:
719: Methoded *MImage_create(Pool& pool) {
720: return image_class=new(pool) MImage(pool);
1.1 paf 721: }
E-mail:
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to image.C CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [parser3project] / parser3 / src / classes