Annotation of parser3/src/classes/image.C, revision 1.17
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:
1.17 ! paf 8: $Id: image.C,v 1.16 2001/04/12 16:26:20 paf Exp $
1.1 paf 9: */
10:
11: #include "pa_config_includes.h"
12:
1.6 paf 13: #include <stdio.h>
14:
1.8 paf 15: #ifdef WIN32
16: # include "smtp/smtp.h"
17: #endif
18:
19: #include "gif.h"
1.6 paf 20:
1.1 paf 21: #include "pa_common.h"
22: #include "pa_request.h"
23: #include "pa_vfile.h"
24: #include "pa_vimage.h"
25:
26: // global var
27:
28: VStateless_class *image_class;
29:
30: // helpers
31:
32: class Measure_reader {
33: public:
1.16 paf 34: enum { READ_CHUNK_SIZE=0x400 };// 1K
35: typedef size_t(*Func)(void *& buf, size_t limit, void *info);
1.1 paf 36:
37: Measure_reader(Func afunc, void *ainfo) :
38: func(afunc), info(ainfo),
39: chunk(0), offset(0), size(0) {
40: }
41:
42: size_t read(unsigned char *& buf, size_t limit) {
1.3 paf 43: if(offset+limit>size) // nothing left
44: if(offset==0 || limit==1) { // only one-byte continuations allowed
45: size=(*func)(chunk, READ_CHUNK_SIZE, info);
46: offset=0;
47: } else
1.16 paf 48: return 0;// as if EOF
1.1 paf 49: if(!size) // EOF
50: return 0;
51:
52: // something left
53: size_t read_size=min(offset+limit, size)-offset;
54: buf=((unsigned char *)chunk)+offset;
55: offset+=read_size;
56: return read_size;
57: }
58:
59: private:
60: Func func;
61: void *info;
62:
63: void *chunk;
64: size_t offset;
65: size_t size;
66: };
67:
68: // GIF
69: struct GIF_Header {
1.16 paf 70: char type[3]; // 'GIF'
1.1 paf 71: char version[3];
72: unsigned char width[2];
73: unsigned char height[2];
74: char dif;
75: char fonColor;
76: char nulls;
77: };
78:
79: // JPEG
80: struct JFIF_Header {
1.16 paf 81: char length[2]; // length of JFIF segment marker
82: char identifier[5]; // JFIF identifier
83: char version[2]; // version
84: char units; // units X of Y pixel density
85: char xdensity[2]; // X pixel density
86: char ydensity[2]; // X pixel density
87: char xthumbnails; // width of thumbnails
88: char ythumbnails; // height of thumbnails
89: char reserved; // reserved
1.1 paf 90: };
91: struct JPG_Frame {
1.16 paf 92: char length[2]; // length of image marker
93: char data; // data precision of bits/sample
94: char height[2]; // image height
95: char width[2]; // image width
96: char numComponents; // number of color components
1.1 paf 97: };
98:
99: //
100:
101: inline short bytes_to_int(unsigned char HI, unsigned char LO) {
1.16 paf 102: return(short)((HI<<8) + LO);
1.1 paf 103: }
104:
105: void measure_gif(Pool& pool, const String *origin_string,
106: Measure_reader& reader, int& width, int& height) {
107:
108: unsigned char *buf;
109: const int head_size=sizeof(GIF_Header);
110: if(reader.read(buf, head_size)<head_size)
111: PTHROW(0, 0,
112: origin_string,
113: "broken GIF header - file size is less then %d bytes", head_size);
114:
115: GIF_Header& screenD=*reinterpret_cast<GIF_Header *>(buf);
116: if(strncmp(screenD.type, "GIF", 3)!=0)
117: PTHROW(0, 0,
118: origin_string,
119: "bad image file - GIF signature not found");
120:
121: width=bytes_to_int(screenD.width[1], screenD.width[0]);
122: height=bytes_to_int(screenD.height[1], screenD.height[0]);
123: }
124:
125: void measure_jpeg(Pool& pool, const String *origin_string,
126: Measure_reader& reader, int& width, int& height) {
1.2 paf 127: // JFIF format markers
128: const unsigned char SOI=0xD8;
129: const unsigned char EOI=0xD9;
130: const unsigned char APP0=0xE0;
131: const unsigned char SOF0=0xC0;
132: const unsigned char SOF2=0xC2;
133: const unsigned char COM=0xFE;
134:
1.1 paf 135: unsigned char *screenD_buf;
1.3 paf 136: unsigned char *h_buf=0;
1.1 paf 137:
138: bool flag=false;
139:
140: unsigned char *prefix;
141: const prefix_size=2;
142: if(reader.read(prefix, prefix_size)<prefix_size)
143: PTHROW(0, 0,
144: origin_string,
145: "broken JPEG file - size is less then %d bytes", prefix_size);
146:
147: if(((unsigned char *)prefix)[1]!=SOI)
148: PTHROW(0, 0,
149: origin_string,
150: "broken JPEG file - second byte of header is not 0x%02X", SOI);
151:
152: unsigned char zero=0;
153: unsigned char *marker=&zero;
154:
155: do {
156: while((*marker)!=0xFF)
157: if(reader.read(marker, sizeof(char))<=0) break;
158: if(reader.read(marker, sizeof(char))<=0) break;
159: switch(*marker) {
160: case EOI:
161: marker=&zero;
162: break;
163: case APP0:
164: if(!flag) {
165: flag=true;
166: if(reader.read(screenD_buf, sizeof(JFIF_Header)) < sizeof(JFIF_Header))
167: break;
168: JFIF_Header& screenD=*reinterpret_cast<JFIF_Header *>(screenD_buf);
169: if((bytes_to_int(screenD.length[0], screenD.length[1]) < 16) ||
1.2 paf 170: strcasecmp(screenD.identifier, "JFIF")) flag=false;
1.1 paf 171: }
172: break;
173: case SOF0:
174: case SOF2:
175: if(reader.read(h_buf, sizeof(JPG_Frame))<sizeof(JPG_Frame))
176: flag=false;
177: break;
178: default: break;
179: }
180: } while(*marker!=EOI);
181:
1.3 paf 182: if(flag && h_buf) {
1.1 paf 183: JPG_Frame& h=*reinterpret_cast<JPG_Frame *>(h_buf);
184: width=bytes_to_int(h.width[0], h.width[1]);
185: height=bytes_to_int(h.height[0], h.height[1]);
186: } else
1.16 paf 187: PTHROW(0, 0,
188: origin_string,
1.1 paf 189: "broken JPEG file - APP0 frame not found");
190: }
191:
192: // measure center
193:
194: void measure(Pool& pool, const String& file_name,
195: Measure_reader& reader, int& width, int& height) {
196: if(const char *cext=strrchr(file_name.cstr(), '.')) {
197: cext++;
198: if(strcasecmp(cext, "GIF")==0)
199: measure_gif(pool, &file_name, reader, width, height);
200: else if(strcasecmp(cext, "JPG")==0 || strcasecmp(cext, "JPEG")==0)
201: measure_jpeg(pool, &file_name, reader, width, height);
202: else
203: PTHROW(0, 0,
204: &file_name,
205: "unhandled image file name extension '%s'", cext);
206: } else
207: PTHROW(0, 0,
208: &file_name,
209: "can not determine image type - no file name extension");
210: }
211:
212: // read from somewhere
213:
214: struct Read_mem_info {
215: unsigned char *ptr;
216: unsigned char *eof;
217: };
218: static size_t read_mem(void*& buf, size_t limit, void *info) {
219: Read_mem_info& rmi=*static_cast<Read_mem_info *>(info);
220: buf=rmi.ptr;
221: size_t read_size=min(limit, (size_t)(rmi.eof-rmi.ptr));
222: rmi.ptr+=read_size;
223: return read_size;
224: }
225:
226: struct Read_disk_info {
227: const String *file_spec;
228: size_t offset;
229: };
230: static size_t read_disk(void*& buf, size_t limit, void *info) {
231: Read_disk_info& rdi=*static_cast<Read_disk_info *>(info);
232: Pool& pool=rdi.file_spec->pool();
233:
234: size_t read_size;
235: file_read(pool, *rdi.file_spec,
236: buf, read_size,
237: false/*as_text*/,
238: true/*fail_on_read_problem*/,
239: rdi.offset, limit);
240:
241: rdi.offset+=read_size;
242: return read_size;
243: }
244:
245: // methods
246:
247: /// ^image:measure[DATA]
1.17 ! paf 248: static void _measure(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 249: Pool& pool=r.pool();
250:
1.17 ! paf 251: Value& data=params->get_no_junction(0, "data must not be code");
1.1 paf 252:
1.16 paf 253: void *info;Measure_reader::Func read_func;
1.1 paf 254: Read_mem_info read_mem_info;
255: Read_disk_info read_disk_info;
256: const String *file_name;
257: if(data.is_string()) {
258: file_name=data.get_string();
259: read_disk_info.file_spec=&r.absolute(*file_name);
260: read_disk_info.offset=0;
1.16 paf 261: info=&read_disk_info;read_func=read_disk;
1.1 paf 262: } else {
263: const VFile& vfile=*data.as_vfile();
264: file_name=&static_cast<Value *>(vfile.fields().get(*name_name))->as_string();
265: read_mem_info.ptr=(unsigned char *)vfile.value_ptr();
266: read_mem_info.eof=read_mem_info.ptr+vfile.value_size();
1.16 paf 267: info=&read_mem_info;read_func=read_mem;
1.1 paf 268: }
269:
270: Measure_reader reader(read_func, info);
271: int width, height;
272: measure(pool, *file_name, reader, width, height);
273:
1.6 paf 274: static_cast<VImage *>(r.self)->set(file_name, width, height);
1.1 paf 275: }
276:
1.4 paf 277: struct Attrib_info {
278: String *tag;
279: Hash *skip;
280: };
1.3 paf 281: static void append_attrib_pair(const Hash::Key& key, Hash::Val *val, void *info) {
1.4 paf 282: Attrib_info& ai=*static_cast<Attrib_info *>(info);
283:
284: if(ai.skip && ai.skip->get(key))
285: return;
286:
1.3 paf 287: Value& value=*static_cast<Value *>(val);
288: // src="a.gif" width=123 ismap[=-1]
1.4 paf 289: *ai.tag << " " << key;
1.6 paf 290: if(value.is_string() || value.as_double()>=0)
291: *ai.tag << "=\"" << value.as_string() << "\"";
1.3 paf 292: }
293: /// ^image.html[]
294: /// ^image.html[hash]
1.17 ! paf 295: static void _html(Request& r, const String& method_name, MethodParams *params) {
1.3 paf 296: Pool& pool=r.pool();
297:
298: String tag(pool);
299: tag << "<img";
1.4 paf 300:
301: Hash& fields=static_cast<VImage *>(r.self)->fields();
1.5 paf 302: Hash *attribs=0;
1.4 paf 303:
1.11 paf 304: if(params->size())
1.17 ! paf 305: if(attribs=params->get(0).get_hash()) {
1.4 paf 306: Attrib_info attrib_info={&tag, 0};
1.5 paf 307: attribs->for_each(append_attrib_pair, &attrib_info);
1.4 paf 308: } else
1.16 paf 309: PTHROW(0, 0,
310: &method_name,
1.5 paf 311: "attributes must be must be hash");
1.4 paf 312:
1.5 paf 313: Attrib_info attrib_info={&tag, attribs};
1.4 paf 314: fields.for_each(append_attrib_pair, &attrib_info);
1.6 paf 315: tag << " />";
1.3 paf 316: r.write_pass_lang(tag);
317: }
1.8 paf 318:
1.16 paf 319: static gdImage *load(Request& r, const String& method_name,
320: const String& file_name){
321: Pool& pool=r.pool();
322:
323: const char *file_name_cstr=r.absolute(file_name).cstr(String::UL_FILE_NAME);
324: if(FILE *f=fopen(file_name_cstr, "rb")) {
325: gdImage& image=*new(pool) gdImage(pool);
326: image.CreateFromGif(f);
327: fclose(f);
328: return ℑ
329: } else {
330: PTHROW(0, 0,
331: &method_name,
332: "can not open '%s'", file_name_cstr);
333: return 0;
334: }
335: }
336:
337:
1.6 paf 338: /// ^image.load[background.gif]
1.17 ! paf 339: static void _load(Request& r, const String& method_name, MethodParams *params) {
1.6 paf 340: Pool& pool=r.pool();
341:
1.17 ! paf 342: Value& vfile_name=params->get_no_junction(0, "file name must not be code");
1.6 paf 343: const String& file_name=vfile_name.as_string();
344:
1.16 paf 345: gdImage& image=*load(r, method_name, file_name);
346: int width=image.SX();
347: int height=image.SY();
348: static_cast<VImage *>(r.self)->set(&file_name, width, height, &image);
1.6 paf 349: }
350:
351: /// ^image.create[width;height] bgcolor=white
352: /// ^image.create[width;height;bgcolor]
1.17 ! paf 353: static void _create(Request& r, const String& method_name, MethodParams *params) {
1.6 paf 354: Pool& pool=r.pool();
355:
1.17 ! paf 356: int width=(int)r.process(params->get(0)).as_double();
! 357: int height=(int)r.process(params->get(1)).as_double();
1.8 paf 358: int bgcolor_value=0xffFFff;
1.6 paf 359: if(params->size()>2)
1.17 ! paf 360: bgcolor_value=(int)r.process(params->get(2)).as_double();
1.15 paf 361: gdImage& image=*new(pool) gdImage(pool);
362: image.Create(width, height);
363: image.FilledRectangle(0, 0, width-1, height-1, image.Color(bgcolor_value));
364: static_cast<VImage *>(r.self)->set(0, width, height, &image);
1.6 paf 365: }
366:
367: /// ^image.gif[]
1.17 ! paf 368: static void _gif(Request& r, const String& method_name, MethodParams *params) {
1.6 paf 369: Pool& pool=r.pool();
370:
1.9 paf 371: gdImage *image=static_cast<VImage *>(r.self)->image;
1.8 paf 372: if(!image)
1.16 paf 373: PTHROW(0, 0,
374: &method_name,
1.12 paf 375: "does not contain an image");
1.6 paf 376:
377: // could _ but don't thing it's wise to use $image.src for vfile.name
1.10 paf 378:
1.16 paf 379: String out(pool); image->Gif(out);
1.6 paf 380:
381: VFile& vfile=*new(pool) VFile(pool);
382: String& image_gif=*new(pool) String(pool, "image/gif");
1.14 paf 383: vfile.set(false/*not tainted*/, out.cstr(), out.size(), 0, &image_gif);
1.6 paf 384:
385: r.write_no_lang(vfile);
386: }
387:
1.12 paf 388: /// ^image.line(x0;y0;x1;y1;color)
1.17 ! paf 389: static void _line(Request& r, const String& method_name, MethodParams *params) {
1.12 paf 390: Pool& pool=r.pool();
391:
392: gdImage *image=static_cast<VImage *>(r.self)->image;
393: if(!image)
1.16 paf 394: PTHROW(0, 0,
395: &method_name,
1.12 paf 396: "does not contain an image");
397:
398: image->Line(
1.17 ! paf 399: (int)r.process(params->get(0)).as_double(),
! 400: (int)r.process(params->get(1)).as_double(),
! 401: (int)r.process(params->get(2)).as_double(),
! 402: (int)r.process(params->get(3)).as_double(),
! 403: image->Color((int)r.process(params->get(4)).as_double()));
1.13 paf 404: }
405:
406: /// ^image.fill(x;y;color)
1.17 ! paf 407: static void _fill(Request& r, const String& method_name, MethodParams *params) {
1.13 paf 408: Pool& pool=r.pool();
409:
410: gdImage *image=static_cast<VImage *>(r.self)->image;
411: if(!image)
1.16 paf 412: PTHROW(0, 0,
413: &method_name,
1.13 paf 414: "does not contain an image");
1.12 paf 415:
1.13 paf 416: image->Fill(
1.17 ! paf 417: (int)r.process(params->get(0)).as_double(),
! 418: (int)r.process(params->get(1)).as_double(),
! 419: image->Color((int)r.process(params->get(2)).as_double()));
1.13 paf 420: }
421:
422: /// ^image.rectangle(x0;y0;x1;y1;color)
1.17 ! paf 423: static void _rectangle(Request& r, const String& method_name, MethodParams *params) {
1.13 paf 424: Pool& pool=r.pool();
425:
426: gdImage *image=static_cast<VImage *>(r.self)->image;
427: if(!image)
1.16 paf 428: PTHROW(0, 0,
429: &method_name,
1.13 paf 430: "does not contain an image");
431:
432: image->Rectangle(
1.17 ! paf 433: (int)r.process(params->get(0)).as_double(),
! 434: (int)r.process(params->get(1)).as_double(),
! 435: (int)r.process(params->get(2)).as_double(),
! 436: (int)r.process(params->get(3)).as_double(),
! 437: image->Color((int)r.process(params->get(4)).as_double()));
1.13 paf 438: }
439:
440: /// ^image.bar(x0;y0;x1;y1;color)
1.17 ! paf 441: static void _bar(Request& r, const String& method_name, MethodParams *params) {
1.13 paf 442: Pool& pool=r.pool();
443:
444: gdImage *image=static_cast<VImage *>(r.self)->image;
445: if(!image)
1.16 paf 446: PTHROW(0, 0,
447: &method_name,
1.13 paf 448: "does not contain an image");
449:
450: image->FilledRectangle(
1.17 ! paf 451: (int)r.process(params->get(0)).as_double(),
! 452: (int)r.process(params->get(1)).as_double(),
! 453: (int)r.process(params->get(2)).as_double(),
! 454: (int)r.process(params->get(3)).as_double(),
! 455: image->Color((int)r.process(params->get(4)).as_double()));
1.13 paf 456: }
457:
458: /// ^image.replace(color-source;color-dest)(x;y)... point coord pairs
1.17 ! paf 459: static void _replace(Request& r, const String& method_name, MethodParams *params) {
1.13 paf 460: Pool& pool=r.pool();
461:
462: gdImage *image=static_cast<VImage *>(r.self)->image;
463: if(!image)
1.16 paf 464: PTHROW(0, 0,
465: &method_name,
1.13 paf 466: "does not contain an image");
467:
468: if((params->size()-2)%2) // I see your thoughts, but that's more readable
1.16 paf 469: PTHROW(0, 0,
470: &method_name,
1.13 paf 471: "y coordinate missing");
472:
473: int n=(params->size()-2)/2;
474:
475: gdImage::Point *p=(gdImage::Point *)pool.malloc(sizeof(gdImage::Point)*n);
476: for(int i=0; i<n; i++) {
1.17 ! paf 477: p[i].x=(int)r.process(params->get(2+i*2+0)).as_double();
! 478: p[i].y=(int)r.process(params->get(2+i*2+1)).as_double();
1.13 paf 479: }
1.16 paf 480: image->FilledPolygonReplaceColor(p, n,
1.17 ! paf 481: image->Color((int)r.process(params->get(0)).as_double()), // src color
! 482: image->Color((int)r.process(params->get(1)).as_double()));// dest color
1.13 paf 483: }
484:
485: /// ^image.polygon(color)(x;y)... point coord pairs
1.17 ! paf 486: static void _polygon(Request& r, const String& method_name, MethodParams *params) {
1.13 paf 487: Pool& pool=r.pool();
488:
489: gdImage *image=static_cast<VImage *>(r.self)->image;
490: if(!image)
1.16 paf 491: PTHROW(0, 0,
492: &method_name,
1.13 paf 493: "does not contain an image");
494:
495: if((params->size()-1)%2) // [I see..] see now?
1.16 paf 496: PTHROW(0, 0,
497: &method_name,
1.13 paf 498: "y coordinate missing");
499:
500: int n=(params->size()-1)/2;
501:
502: gdImage::Point *p=(gdImage::Point *)pool.malloc(sizeof(gdImage::Point)*n);
503: for(int i=0; i<n; i++) {
1.17 ! paf 504: p[i].x=(int)r.process(params->get(1+i*2+0)).as_double();
! 505: p[i].y=(int)r.process(params->get(1+i*2+1)).as_double();
1.13 paf 506: }
1.16 paf 507: image->Polygon(p, n,
1.17 ! paf 508: image->Color((int)r.process(params->get(0)).as_double()));
1.13 paf 509: }
510:
511: /// ^image.polybar(color)(x;y)... point coord pairs
1.17 ! paf 512: static void _polybar(Request& r, const String& method_name, MethodParams *params) {
1.13 paf 513: Pool& pool=r.pool();
514:
515: gdImage *image=static_cast<VImage *>(r.self)->image;
516: if(!image)
1.16 paf 517: PTHROW(0, 0,
518: &method_name,
1.13 paf 519: "does not contain an image");
520:
521: if((params->size()-1)%2) // [I see..] see now?
1.16 paf 522: PTHROW(0, 0,
523: &method_name,
1.13 paf 524: "y coordinate missing");
525:
526: int n=(params->size()-1)/2;
527:
528: gdImage::Point *p=(gdImage::Point *)pool.malloc(sizeof(gdImage::Point)*n);
529: for(int i=0; i<n; i++) {
1.17 ! paf 530: p[i].x=(int)r.process(params->get(1+i*2+0)).as_double();
! 531: p[i].y=(int)r.process(params->get(1+i*2+1)).as_double();
1.13 paf 532: }
1.16 paf 533: image->FilledPolygon(p, n,
1.17 ! paf 534: image->Color((int)r.process(params->get(0)).as_double()));
1.12 paf 535: }
536:
1.16 paf 537: // font
538:
539: #define Y(y)(y+index*height+1)
540: class Font : public Pooled {
541: public:
542:
543: int height; /* Font heigth */
544: int space; /* Default char width */
545: gdImage& ifont;
546: const String& alphabet;
547:
548: Font(Pool& pool,
549: const String& aalphabet,
550: gdImage& aifont, int aheight, int aspace) : Pooled(pool),
551: alphabet(aalphabet),
552: height(aheight), space(aspace),
553: ifont(aifont) {
554: }
555:
556: /* ******************************** char ********************************** */
557:
558: int index_of(char ch) {
559: if(ch==' ') return -1;
560: return alphabet.pos(&ch, 1);
561: }
562:
563: int index_width(int index) {
564: if(index<0)
565: index=index_of('.');
566: if(index<0)
567: return 0;
568: int tr=ifont.GetTransparent();
569: for(int x=ifont.SX()-1; x>0; x--) {
570: for(int y=0; y<height-1; y++)
571: if(ifont.GetPixel(x, Y(y))!=tr)
572: return x+2;
573: }
574: return 0;
575: }
576:
577: void index_display(gdImage& image, int x, int y, int index){
578: if(index>=0)
579: ifont.Copy(image, x, y, 0, Y(0), index_width(index), height-1);
580: }
581:
582: /* ******************************** string ********************************** */
583: /*
584: int string_width(const char *cstr){
585: int result=0;
586: for(; *cstr; cstr++)
587: result+=index_width(index_of(*cstr));
588: return result;
589: }
590: */
591:
592: void string_display(gdImage& image, int x, int y, const String& s){
593: const char *cstr=s.cstr(String::UL_AS_IS);
594: if(cstr) for(; *cstr; cstr++) {
595: int index=index_of(*cstr);
596: index_display(image, x, y, index);
597: x+=space ? space : index_width(index);
598: }
599: }
600:
601: };
602: /// ^image.font[alPHAbet;font-file-name.gif](height)
603: /// ^image.font[alPHAbet;font-file-name.gif](height;width)
1.17 ! paf 604: static void _font(Request& r, const String& method_name, MethodParams *params) {
1.16 paf 605: Pool& pool=r.pool();
606:
1.17 ! paf 607: Value& valphabet=params->get_no_junction(0, "alphabet must not be code");
! 608: Value& file_name=params->get_no_junction(1, "file_name must not be code");
! 609: int height=(int)r.process(params->get(2)).as_double();
1.16 paf 610:
1.17 ! paf 611: int width=params->size()>3?(int)r.process(params->get(3)).as_double():0;
1.16 paf 612:
613: static_cast<VImage *>(r.self)->font=new(pool) Font(pool,
614: valphabet.as_string(),
615: *load(r, method_name, file_name.as_string()),
616: height, width);
617: }
618:
619: /// ^image.text(x;y)[text]
1.17 ! paf 620: static void _text(Request& r, const String& method_name, MethodParams *params) {
1.16 paf 621: Pool& pool=r.pool();
622:
1.17 ! paf 623: int x=(int)r.process(params->get(0)).as_double();
! 624: int y=(int)r.process(params->get(1)).as_double();
! 625: const String& s=r.process(params->get(2)).as_string();
1.16 paf 626:
627: VImage& vimage=*static_cast<VImage *>(r.self);
628: if(vimage.image)
629: if(vimage.font)
630: vimage.font->string_display(*vimage.image, x, y, s);
631: else
632: PTHROW(0, 0,
633: &method_name,
634: "set the font first");
635: else
636: PTHROW(0, 0,
637: &method_name,
638: "does not contain an image");
639: }
640:
1.1 paf 641: // initialize
642: void initialize_image_class(Pool& pool, VStateless_class& vclass) {
643: // ^image:measure[DATA]
644: vclass.add_native_method("measure", Method::CT_DYNAMIC, _measure, 1, 1);
1.3 paf 645:
646: /// ^image.html[]
647: /// ^image.html[hash]
648: vclass.add_native_method("html", Method::CT_DYNAMIC, _html, 0, 1);
1.6 paf 649:
650: /// ^image.load[background.gif]
1.8 paf 651: vclass.add_native_method("load", Method::CT_DYNAMIC, _load, 1, 1);
1.6 paf 652:
653: /// ^image.create[width;height] bgcolor=white
654: /// ^image.create[width;height;bgcolor]
655: vclass.add_native_method("create", Method::CT_DYNAMIC, _create, 2, 3);
656:
657: /// ^image.gif[]
1.14 paf 658: vclass.add_native_method("gif", Method::CT_DYNAMIC, _gif, 0, 0);
1.12 paf 659:
660: /// ^image.line(x0;y0;x1;y1;color)
661: vclass.add_native_method("line", Method::CT_DYNAMIC, _line, 5, 5);
1.13 paf 662:
663: /// ^image.fill(x;y;color)
664: vclass.add_native_method("fill", Method::CT_DYNAMIC, _fill, 3, 3);
665:
666: /// ^image.rectangle(x0;y0;x1;y1;color)
667: vclass.add_native_method("rectangle", Method::CT_DYNAMIC, _rectangle, 5, 5);
668:
669: /// ^image.bar(x0;y0;x1;y1;color)
670: vclass.add_native_method("bar", Method::CT_DYNAMIC, _bar, 5, 5);
671:
672: /// ^image.replace(color-source;color-dest)(x;y)... point coord pairs
673: vclass.add_native_method("replace", Method::CT_DYNAMIC, _replace, 2+3*2, 2+100*2);
674:
675: /// ^image.polygon(color)(x;y)... point coord pairs
676: vclass.add_native_method("polygon", Method::CT_DYNAMIC, _polygon, 1+3*2, 1+100*2);
677:
678: /// ^image.polybar(color)(x;y)... point coord pairs
679: vclass.add_native_method("polybar", Method::CT_DYNAMIC, _polybar, 1+3*2, 1+100*2);
680:
1.16 paf 681: /// ^image.font[alPHAbet;font-file-name.gif](height)
682: /// ^image.font[alPHAbet;font-file-name.gif](height;width)
683: vclass.add_native_method("font", Method::CT_DYNAMIC, _font, 3, 4);
684:
685: /// ^image.text(x;y)[text]
686: vclass.add_native_method("text", Method::CT_DYNAMIC, _text, 3, 3);
687:
1.1 paf 688: }
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