--- parser3/src/classes/image.C 2001/04/10 14:00:02 1.3 +++ parser3/src/classes/image.C 2001/08/31 10:18:08 1.35 @@ -1,47 +1,70 @@ /** @file Parser: @b image parser class. - Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com) + Copyright(c) 2001 ArtLebedev Group(http://www.artlebedev.com) - Author: Alexander Petrosyan (http://design.ru/paf) + Author: Alexander Petrosyan (http://design.ru/paf) - $Id: image.C,v 1.3 2001/04/10 14:00:02 paf Exp $ + $Id: image.C,v 1.35 2001/08/31 10:18:08 parser Exp $ +*/ +static const char *RCSId="$Id: image.C,v 1.35 2001/08/31 10:18:08 parser Exp $"; + +/* + jpegsize: gets the width and height (in pixels) of a jpeg file + Andrew Tong, werdna@ugcs.caltech.edu February 14, 1995 + modified slightly by alex@ed.ac.uk + and further still by rjray@uswest.com + optimization and general re-write from tmetro@vl.com + from perl by paf@design.ru */ #include "pa_config_includes.h" -#ifdef WIN32 -# include "smtp/smtp.h" -#endif +#include "gif.h" #include "pa_common.h" #include "pa_request.h" #include "pa_vfile.h" #include "pa_vimage.h" -// global var +// defines + +#define IMAGE_CLASS_NAME "image" -VStateless_class *image_class; +// class + +class MImage : public Methoded { +public: // VStateless_class + Value *create_new_value(Pool& pool) { return new(pool) VImage(pool); } + +public: + MImage(Pool& pool); + +public: // Methoded + bool used_directly() { return true; } + +}; // helpers +/// simple buffered reader[from memory/file], used in _measure class Measure_reader { public: - enum { READ_CHUNK_SIZE=0x400 }; // 1K - typedef size_t (*Func)(void *& buf, size_t limit, void *info); + enum { READ_CHUNK_SIZE=0x400*10 };// 10K + typedef size_t(*Func)(void *& buf, size_t limit, void *info); Measure_reader(Func afunc, void *ainfo) : func(afunc), info(ainfo), chunk(0), offset(0), size(0) { } - size_t read(unsigned char *& buf, size_t limit) { + size_t read(void *&buf, size_t limit) { if(offset+limit>size) // nothing left if(offset==0 || limit==1) { // only one-byte continuations allowed size=(*func)(chunk, READ_CHUNK_SIZE, info); offset=0; } else - return 0; // as if EOF + return 0;// as if EOF if(!size) // EOF return 0; @@ -61,9 +84,9 @@ private: size_t size; }; -// GIF +/// GIF file header struct GIF_Header { - char type[3]; // 'GIF' + char type[3]; // 'GIF' char version[3]; unsigned char width[2]; unsigned char height[2]; @@ -72,117 +95,108 @@ struct GIF_Header { char nulls; }; -// JPEG -struct JFIF_Header { - char length[2]; // length of JFIF segment marker - char identifier[5]; // JFIF identifier - char version[2]; // version - char units; // units X of Y pixel density - char xdensity[2]; // X pixel density - char ydensity[2]; // X pixel density - char xthumbnails; // width of thumbnails - char ythumbnails; // height of thumbnails - char reserved; // reserved +/// JPEG record head +struct JPG_Segment_head { + unsigned char marker; + unsigned char code; + unsigned char length[2]; }; -struct JPG_Frame { - char length[2]; // length of image marker - char data; // data precision of bits/sample - char height[2]; // image height - char width[2]; // image width - char numComponents; // number of color components +/// JPEG frame header +struct JPG_Size_segment_body { + char data; //< data precision of bits/sample + unsigned char height[2]; //< image height + unsigned char width[2]; //< image width + char numComponents; //< number of color components }; // -inline short bytes_to_int(unsigned char HI, unsigned char LO) { - return (short)((HI<<8) + LO); +inline short x_endian_to_int(unsigned char L, unsigned char H) { + return(short)((H<<8) + L); +} + +inline short big_endian_to_int(unsigned char b[2]) { + return x_endian_to_int(b[1], b[0]); +} + +inline short little_endian_to_int(unsigned char b[2]) { + return x_endian_to_int(b[0], b[1]); } void measure_gif(Pool& pool, const String *origin_string, Measure_reader& reader, int& width, int& height) { - unsigned char *buf; + void *buf; const int head_size=sizeof(GIF_Header); if(reader.read(buf, head_size)(buf); - if(strncmp(screenD.type, "GIF", 3)!=0) + if(strncmp(head->type, "GIF", 3)!=0) PTHROW(0, 0, origin_string, - "bad image file - GIF signature not found"); + "not GIF file - signature not found"); - width=bytes_to_int(screenD.width[1], screenD.width[0]); - height=bytes_to_int(screenD.height[1], screenD.height[0]); + width=little_endian_to_int(head->width); + height=little_endian_to_int(head->height); } void measure_jpeg(Pool& pool, const String *origin_string, Measure_reader& reader, int& width, int& height) { // JFIF format markers - const unsigned char SOI=0xD8; - const unsigned char EOI=0xD9; - const unsigned char APP0=0xE0; - const unsigned char SOF0=0xC0; - const unsigned char SOF2=0xC2; - const unsigned char COM=0xFE; - - unsigned char *screenD_buf; - unsigned char *h_buf=0; - - bool flag=false; - - unsigned char *prefix; - const prefix_size=2; - if(reader.read(prefix, prefix_size)(screenD_buf); - if((bytes_to_int(screenD.length[0], screenD.length[1]) < 16) || - strcasecmp(screenD.identifier, "JFIF")) flag=false; - } + "not JPEG file - signature not found"); + + bool found=false; + while(true) { + void *buf; + // Extract the segment header. + if(reader.read(buf, sizeof(JPG_Segment_head))marker!=MARKER) break; - case SOF0: - case SOF2: - if(reader.read(h_buf, sizeof(JPG_Frame))code >= CODE_SIZE_FIRST && head->code <= CODE_SIZE_LAST) { + // Segments that contain size info + if(reader.read(buf, sizeof(JPG_Size_segment_body))width); + height=big_endian_to_int(body->height); + found=true; break; - default: break; - } - } while(*marker!=EOI); - - if(flag && h_buf) { - JPG_Frame& h=*reinterpret_cast(h_buf); - width=bytes_to_int(h.width[0], h.width[1]); - height=bytes_to_int(h.height[0], h.height[1]); - } else - PTHROW(0, 0, - origin_string, - "broken JPEG file - APP0 frame not found"); + } else { + // Dummy read to skip over data + size_t limit=big_endian_to_int(head->length) - 2; + if(reader.read(buf, limit)(params->get(0)); - // forcing [this body type] - r.fail_if_junction_(true, data, method_name, "data must not be code"); + Value& data=params->as_no_junction(0, "data must not be code"); - void *info; Measure_reader::Func read_func; + void *info;Measure_reader::Func read_func; Read_mem_info read_mem_info; Read_disk_info read_disk_info; const String *file_name; @@ -256,54 +267,440 @@ static void _measure(Request& r, const S file_name=data.get_string(); read_disk_info.file_spec=&r.absolute(*file_name); read_disk_info.offset=0; - info=&read_disk_info; read_func=read_disk; + info=&read_disk_info;read_func=read_disk; } else { const VFile& vfile=*data.as_vfile(); file_name=&static_cast(vfile.fields().get(*name_name))->as_string(); read_mem_info.ptr=(unsigned char *)vfile.value_ptr(); read_mem_info.eof=read_mem_info.ptr+vfile.value_size(); - info=&read_mem_info; read_func=read_mem; + info=&read_mem_info;read_func=read_mem; } Measure_reader reader(read_func, info); int width, height; measure(pool, *file_name, reader, width, height); - static_cast(r.self)->set(*file_name, width, height); + static_cast(r.self)->set(file_name, width, height); } +/// used by image: _html / append_attrib_pair +struct Attrib_info { + String *tag; ///< html tag being constructed + Hash *skip; ///< tag attributes not to append to tag string [to skip] +}; static void append_attrib_pair(const Hash::Key& key, Hash::Val *val, void *info) { - String& tag=*static_cast(info); + Attrib_info& ai=*static_cast(info); + + if(ai.skip && ai.skip->get(key)) + return; + Value& value=*static_cast(val); // src="a.gif" width=123 ismap[=-1] - tag << " " << key; - if(value.is_string() || value.as_double()>=0) { - tag << "="; - if(value.is_string()) - tag << "\""; - tag << value.as_string(); - if(value.is_string()) - tag << "\""; - } + *ai.tag << " " << key; + if(value.is_string() || value.as_int()>=0) + *ai.tag << "=\"" << value.as_string() << "\""; } -/// ^image.html[] -/// ^image.html[hash] -static void _html(Request& r, const String& method_name, Array *params) { +static void _html(Request& r, const String& method_name, MethodParams *params) { Pool& pool=r.pool(); String tag(pool); tag << "(r.self)->fields().for_each(append_attrib_pair, &tag); - tag << ">"; + + const Hash& fields=static_cast(r.self)->fields(); + Hash *attribs=0; + + if(params->size()) + if(attribs=params->get(0).get_hash()) { + Attrib_info attrib_info={&tag, 0}; + attribs->for_each(append_attrib_pair, &attrib_info); + } else + PTHROW(0, 0, + &method_name, + "attributes must be must be hash"); + + Attrib_info attrib_info={&tag, attribs}; + fields.for_each(append_attrib_pair, &attrib_info); + tag << " />"; r.write_pass_lang(tag); } -// initialize -void initialize_image_class(Pool& pool, VStateless_class& vclass) { +static gdImage *load(Request& r, const String& method_name, + const String& file_name){ + Pool& pool=r.pool(); + + const char *file_name_cstr=r.absolute(file_name).cstr(String::UL_FILE_NAME); + if(FILE *f=fopen(file_name_cstr, "rb")) { + gdImage& image=*new(pool) gdImage(pool); + bool ok=image.CreateFromGif(f); + fclose(f); + if(!ok) + PTHROW(0, 0, + &file_name, + "is not in GIF format"); + return ℑ + } else { + PTHROW(0, 0, + &method_name, + "can not open '%s'", file_name_cstr); + return 0; + } +} + + +static void _load(Request& r, const String& method_name, MethodParams *params) { + Pool& pool=r.pool(); + + Value& vfile_name=params->as_no_junction(0, "file name must not be code"); + const String& file_name=vfile_name.as_string(); + + gdImage& image=*load(r, method_name, file_name); + int width=image.SX(); + int height=image.SY(); + static_cast(r.self)->set(&file_name, width, height, &image); +} + +static void _create(Request& r, const String& method_name, MethodParams *params) { + Pool& pool=r.pool(); + + int width=r.process(params->get(0)).as_int(); + int height=r.process(params->get(1)).as_int(); + int bgcolor_value=0xffFFff; + if(params->size()>2) + bgcolor_value=r.process(params->get(2)).as_int(); + gdImage& image=*new(pool) gdImage(pool); + image.Create(width, height); + image.FilledRectangle(0, 0, width-1, height-1, image.Color(bgcolor_value)); + static_cast(r.self)->set(0, width, height, &image); +} + +static void _gif(Request& r, const String& method_name, MethodParams *params) { + Pool& pool=r.pool(); + + gdImage *image=static_cast(r.self)->image; + if(!image) + PTHROW(0, 0, + &method_name, + "does not contain an image"); + + // could _ but don't thing it's wise to use $image.src for vfile.name + + String out(pool); image->Gif(out); + + VFile& vfile=*new(pool) VFile(pool); + String& image_gif=*new(pool) String(pool, "image/gif"); + vfile.set(false/*not tainted*/, + out.cstr(String::UL_AS_IS), out.size(), 0, &image_gif); + + r.write_no_lang(vfile); +} + +static void _line(Request& r, const String& method_name, MethodParams *params) { + Pool& pool=r.pool(); + + gdImage *image=static_cast(r.self)->image; + if(!image) + PTHROW(0, 0, + &method_name, + "does not contain an image"); + + image->Line( + r.process(params->get(0)).as_int(), + r.process(params->get(1)).as_int(), + r.process(params->get(2)).as_int(), + r.process(params->get(3)).as_int(), + image->Color(r.process(params->get(4)).as_int())); +} + +static void _fill(Request& r, const String& method_name, MethodParams *params) { + Pool& pool=r.pool(); + + gdImage *image=static_cast(r.self)->image; + if(!image) + PTHROW(0, 0, + &method_name, + "does not contain an image"); + + image->Fill( + r.process(params->get(0)).as_int(), + r.process(params->get(1)).as_int(), + image->Color(r.process(params->get(2)).as_int())); +} + +static void _rectangle(Request& r, const String& method_name, MethodParams *params) { + Pool& pool=r.pool(); + + gdImage *image=static_cast(r.self)->image; + if(!image) + PTHROW(0, 0, + &method_name, + "does not contain an image"); + + image->Rectangle( + r.process(params->get(0)).as_int(), + r.process(params->get(1)).as_int(), + r.process(params->get(2)).as_int(), + r.process(params->get(3)).as_int(), + image->Color(r.process(params->get(4)).as_int())); +} + +static void _bar(Request& r, const String& method_name, MethodParams *params) { + Pool& pool=r.pool(); + + gdImage *image=static_cast(r.self)->image; + if(!image) + PTHROW(0, 0, + &method_name, + "does not contain an image"); + + image->FilledRectangle( + r.process(params->get(0)).as_int(), + r.process(params->get(1)).as_int(), + r.process(params->get(2)).as_int(), + r.process(params->get(3)).as_int(), + image->Color(r.process(params->get(4)).as_int())); +} + +static void _replace(Request& r, const String& method_name, MethodParams *params) { + Pool& pool=r.pool(); + + gdImage *image=static_cast(r.self)->image; + if(!image) + PTHROW(0, 0, + &method_name, + "does not contain an image"); + + if((params->size()-2)%2) // I see your thoughts, but that's more readable + PTHROW(0, 0, + &method_name, + "y coordinate missing"); + + int n=(params->size()-2)/2; + + gdImage::Point *p=(gdImage::Point *)pool.malloc(sizeof(gdImage::Point)*n); + for(int i=0; iget(2+i*2+0)).as_int(); + p[i].y=r.process(params->get(2+i*2+1)).as_int(); + } + image->FilledPolygonReplaceColor(p, n, + image->Color(r.process(params->get(0)).as_int()), // src color + image->Color(r.process(params->get(1)).as_int()));// dest color +} + +static void _polygon(Request& r, const String& method_name, MethodParams *params) { + Pool& pool=r.pool(); + + gdImage *image=static_cast(r.self)->image; + if(!image) + PTHROW(0, 0, + &method_name, + "does not contain an image"); + + if((params->size()-1)%2) // [I see..] see now? + PTHROW(0, 0, + &method_name, + "y coordinate missing"); + + int n=(params->size()-1)/2; + + gdImage::Point *p=(gdImage::Point *)pool.malloc(sizeof(gdImage::Point)*n); + for(int i=0; iget(1+i*2+0)).as_int(); + p[i].y=r.process(params->get(1+i*2+1)).as_int(); + } + image->Polygon(p, n, + image->Color(r.process(params->get(0)).as_int())); +} + +static void _polybar(Request& r, const String& method_name, MethodParams *params) { + Pool& pool=r.pool(); + + gdImage *image=static_cast(r.self)->image; + if(!image) + PTHROW(0, 0, + &method_name, + "does not contain an image"); + + if((params->size()-1)%2) // [I see..] see now? + PTHROW(0, 0, + &method_name, + "y coordinate missing"); + + int n=(params->size()-1)/2; + + gdImage::Point *p=(gdImage::Point *)pool.malloc(sizeof(gdImage::Point)*n); + for(int i=0; iget(1+i*2+0)).as_int(); + p[i].y=r.process(params->get(1+i*2+1)).as_int(); + } + image->FilledPolygon(p, n, + image->Color(r.process(params->get(0)).as_int())); +} + +// font + +#define Y(y)(y+index*height+1) + +/// simple gdImage-based font storage & text output +class Font : public Pooled { +public: + + const static int kerning; + int height; ///< Font heigth + int monospace; ///< Default char width + int spacebarspace; ///< spacebar width + gdImage& ifont; + const String& alphabet; + + Font(Pool& pool, + const String& aalphabet, + gdImage& aifont, int aheight, int amonospace, int aspacebarspace) : Pooled(pool), + alphabet(aalphabet), + height(aheight), monospace(amonospace), spacebarspace(aspacebarspace), + ifont(aifont) { + } + + /* ******************************** char ********************************** */ + + int index_of(char ch) { + if(ch==' ') return -1; + return alphabet.pos(&ch, 1); + } + + int index_width(int index) { + if(index<0) + return spacebarspace; + int tr=ifont.GetTransparent(); + for(int x=ifont.SX()-1; x>=0; x--) { + for(int y=0; y=0) + ifont.Copy(image, x, y, 0, Y(0), index_width(index), height-1); + } + + /* ******************************** string ********************************** */ + /* + int string_width(const char *cstr){ + int result=0; + for(; *cstr; cstr++) + result+=index_width(index_of(*cstr)); + return result; + } + */ + + void string_display(gdImage& image, int x, int y, const String& s){ + const char *cstr=s.cstr(String::UL_AS_IS); + if(cstr) for(; *cstr; cstr++) { + int index=index_of(*cstr); + index_display(image, x, y, index); + x+=kerning + (monospace ? monospace : index_width(index)); + } + } + +}; +const int Font::kerning=1; + +static void _font(Request& r, const String& method_name, MethodParams *params) { + Pool& pool=r.pool(); + + Value& valphabet=params->as_no_junction(0, "alphabet must not be code"); + Value& file_name=params->as_no_junction(1, "file_name must not be code"); + int height=r.process(params->get(2)).as_int(); + int spacebar_width=r.process(params->get(3)).as_int(); + + int monospace_width=params->size()>4?r.process(params->get(4)).as_int():0; + + static_cast(r.self)->font=new(pool) Font(pool, + valphabet.as_string(), + *load(r, method_name, file_name.as_string()), + height, monospace_width, spacebar_width); +} + +static void _text(Request& r, const String& method_name, MethodParams *params) { + Pool& pool=r.pool(); + + int x=r.process(params->get(0)).as_int(); + int y=r.process(params->get(1)).as_int(); + const String& s=r.process(params->get(2)).as_string(); + + VImage& vimage=*static_cast(r.self); + if(vimage.image) + if(vimage.font) + vimage.font->string_display(*vimage.image, x, y, s); + else + PTHROW(0, 0, + &method_name, + "set the font first"); + else + PTHROW(0, 0, + &method_name, + "does not contain an image"); +} + +// constructor + +MImage::MImage(Pool& apool) : Methoded(apool) { + set_name(*NEW String(pool(), IMAGE_CLASS_NAME)); + + // ^image:measure[DATA] - vclass.add_native_method("measure", Method::CT_DYNAMIC, _measure, 1, 1); + add_native_method("measure", Method::CT_DYNAMIC, _measure, 1, 1); + + // ^image.html[] + // ^image.html[hash] + add_native_method("html", Method::CT_DYNAMIC, _html, 0, 1); + + // ^image.load[background.gif] + add_native_method("load", Method::CT_DYNAMIC, _load, 1, 1); + + // ^image.create[width;height] bgcolor=white + // ^image.create[width;height;bgcolor] + add_native_method("create", Method::CT_DYNAMIC, _create, 2, 3); + + // ^image.gif[] + add_native_method("gif", Method::CT_DYNAMIC, _gif, 0, 0); + + // ^image.line(x0;y0;x1;y1;color) + add_native_method("line", Method::CT_DYNAMIC, _line, 5, 5); + + // ^image.fill(x;y;color) + add_native_method("fill", Method::CT_DYNAMIC, _fill, 3, 3); + + // ^image.rectangle(x0;y0;x1;y1;color) + add_native_method("rectangle", Method::CT_DYNAMIC, _rectangle, 5, 5); + + // ^image.bar(x0;y0;x1;y1;color) + add_native_method("bar", Method::CT_DYNAMIC, _bar, 5, 5); + + // ^image.replace(color-source;color-dest)(x;y)... point coord pairs + add_native_method("replace", Method::CT_DYNAMIC, _replace, 2+3*2, 2+100*2); + + // ^image.polygon(color)(x;y)... point coord pairs + add_native_method("polygon", Method::CT_DYNAMIC, _polygon, 1+3*2, 1+100*2); + + // ^image.polybar(color)(x;y)... point coord pairs + add_native_method("polybar", Method::CT_DYNAMIC, _polybar, 1+3*2, 1+100*2); + + // ^image.font[alPHAbet;font-file-name.gif](height;spacebar_width) + // ^image.font[alPHAbet;font-file-name.gif](height;spacebar_width;width) + add_native_method("font", Method::CT_DYNAMIC, _font, 4, 5); + + // ^image.text(x;y)[text] + add_native_method("text", Method::CT_DYNAMIC, _text, 3, 3); + +} + +// global variable + +Methoded *image_class; + +// creator - /// ^image.html[] - /// ^image.html[hash] - vclass.add_native_method("html", Method::CT_DYNAMIC, _html, 0, 1); +Methoded *MImage_create(Pool& pool) { + return image_class=new(pool) MImage(pool); }