--- parser3/src/classes/image.C 2001/10/16 06:46:25 1.53 +++ parser3/src/classes/image.C 2002/08/01 11:41:12 1.74 @@ -1,12 +1,12 @@ /** @file Parser: @b image parser class. - Copyright(c) 2001 ArtLebedev Group(http://www.artlebedev.com) - Author: Alexander Petrosyan (http://design.ru/paf) - - $Id: image.C,v 1.53 2001/10/16 06:46:25 parser Exp $ + Copyright(c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com) + Author: Alexandr Petrosian (http://paf.design.ru) */ +static const char* IDENT_IMAGE_C="$Date: 2002/08/01 11:41:12 $"; + /* jpegsize: gets the width and height (in pixels) of a jpeg file Andrew Tong, werdna@ugcs.caltech.edu February 14, 1995 @@ -25,10 +25,6 @@ #include "pa_vfile.h" #include "pa_vimage.h" -// defines - -#define IMAGE_CLASS_NAME "image" - // class class MImage : public Methoded { @@ -83,9 +79,19 @@ private: }; #endif +/// PNG file header +struct PNG_Header { + char dummy[12]; + char signature[4]; //< must be "IHDR" + unsigned char high_width[2]; //< image width high bytes [we ignore for now] + unsigned char width[2]; //< image width low bytes + unsigned char high_height[2]; //< image height high bytes [we ignore for now] + unsigned char height[4]; //< image height +}; + /// GIF file header struct GIF_Header { - char type[3]; // 'GIF' + char signature[3]; // 'GIF' char version[3]; unsigned char width[2]; unsigned char height[2]; @@ -128,13 +134,13 @@ void measure_gif(Pool& pool, const Strin void *buf; const int head_size=sizeof(GIF_Header); if(reader.read(buf, head_size)type, "GIF", 3)!=0) - PTHROW(0, 0, + if(strncmp(head->signature, "GIF", 3)!=0) + throw Exception("image.format", origin_string, "not GIF file - wrong signature"); @@ -142,6 +148,7 @@ void measure_gif(Pool& pool, const Strin height=little_endian_to_int(head->height); } +/// @test remove ugly mech in reader - 20K limit void measure_jpeg(Pool& pool, const String *origin_string, Measure_reader& reader, int& width, int& height) { // JFIF format markers @@ -152,13 +159,13 @@ void measure_jpeg(Pool& pool, const Stri void *buf; const size_t prefix_size=2; if(reader.read(buf, prefix_size)signature, "IHDR", 4)!=0) + throw Exception("image.format", + origin_string, + "not PNG file - wrong signature"); + + width=big_endian_to_int(head->width); + height=big_endian_to_int(head->height); +} + // measure center void measure(Pool& pool, const String& file_name, Measure_reader& reader, int& width, int& height) { - if(const char *cext=strrchr(file_name.cstr(), '.')) { + if(const char *cext=strrchr(file_name.cstr(String::UL_FILE_SPEC), '.')) { cext++; if(strcasecmp(cext, "GIF")==0) measure_gif(pool, &file_name, reader, width, height); else if(strcasecmp(cext, "JPG")==0 || strcasecmp(cext, "JPEG")==0) measure_jpeg(pool, &file_name, reader, width, height); + else if(strcasecmp(cext, "PNG")==0) + measure_png(pool, &file_name, reader, width, height); else - PTHROW(0, 0, + throw Exception("image.format", &file_name, "unhandled image file name extension '%s'", cext); } else - PTHROW(0, 0, + throw Exception("image.format", &file_name, "can not determine image type - no file name extension"); } @@ -313,15 +342,16 @@ static void _html(Request& r, const Stri Hash *attribs=0; if(params->size()) { - Value &vattribs=r.process(params->get(0), - 0/*no name*/, + // for backward compatibility: someday was ^html{} + Value &vattribs=r.process_to_value(params->get(0), + /*0/*no name* /,*/ false/*don't intercept string*/); if(vattribs.is_defined()) // allow 'void' - if(attribs=vattribs.get_hash()) { + if(attribs=vattribs.get_hash(&method_name)) { Attrib_info attrib_info={&tag, 0}; attribs->for_each(append_attrib_pair, &attrib_info); } else - PTHROW(0, 0, + throw Exception("parser.runtime", &method_name, "attributes must be hash"); } @@ -332,6 +362,7 @@ static void _html(Request& r, const Stri r.write_pass_lang(tag); } +/// @test wrap FILE to auto-object static gdImage *load(Request& r, const String& method_name, const String& file_name){ Pool& pool=r.pool(); @@ -342,12 +373,12 @@ static gdImage *load(Request& r, const S bool ok=image.CreateFromGif(f); fclose(f); if(!ok) - PTHROW(0, 0, + throw Exception("image.format", &file_name, "is not in GIF format"); return ℑ } else { - PTHROW(0, 0, + throw Exception("file.missing", &method_name, "can not open '%s'", file_name_cstr); return 0; @@ -385,7 +416,7 @@ static void _gif(Request& r, const Strin gdImage *image=static_cast(r.self)->image; if(!image) - PTHROW(0, 0, + throw Exception(0, &method_name, "does not contain an image"); @@ -396,7 +427,7 @@ static void _gif(Request& r, const Strin VFile& vfile=*new(pool) VFile(pool); Value *content_type=new(pool) VString(*new(pool) String(pool, "image/gif")); vfile.set(false/*not tainted*/, - out.cstr(String::UL_AS_IS), out.size(), 0, content_type); + out.cstr(), out.size(), 0, content_type); r.write_no_lang(vfile); } @@ -406,7 +437,7 @@ static void _line(Request& r, const Stri gdImage *image=static_cast(r.self)->image; if(!image) - PTHROW(0, 0, + throw Exception(0, &method_name, "does not contain an image"); @@ -423,7 +454,7 @@ static void _fill(Request& r, const Stri gdImage *image=static_cast(r.self)->image; if(!image) - PTHROW(0, 0, + throw Exception(0, &method_name, "does not contain an image"); @@ -438,7 +469,7 @@ static void _rectangle(Request& r, const gdImage *image=static_cast(r.self)->image; if(!image) - PTHROW(0, 0, + throw Exception(0, &method_name, "does not contain an image"); @@ -455,7 +486,7 @@ static void _bar(Request& r, const Strin gdImage *image=static_cast(r.self)->image; if(!image) - PTHROW(0, 0, + throw Exception(0, &method_name, "does not contain an image"); @@ -482,13 +513,13 @@ static void _replace(Request& r, const S gdImage *image=static_cast(r.self)->image; if(!image) - PTHROW(0, 0, + throw Exception(0, &method_name, "does not contain an image"); Table *table=params->as_no_junction(2, "coordinates must not be code").get_table(); if(!table) - PTHROW(0, 0, + throw Exception(0, &method_name, "coordinates must be table"); @@ -505,13 +536,13 @@ static void _polyline(Request& r, const gdImage *image=static_cast(r.self)->image; if(!image) - PTHROW(0, 0, + throw Exception(0, &method_name, "does not contain an image"); Table *table=params->as_no_junction(1, "coordinates must not be code").get_table(); if(!table) - PTHROW(0, 0, + throw Exception(0, &method_name, "coordinates must be table"); @@ -528,13 +559,13 @@ static void _polygon(Request& r, const S gdImage *image=static_cast(r.self)->image; if(!image) - PTHROW(0, 0, + throw Exception(0, &method_name, "does not contain an image"); Table *table=params->as_no_junction(1, "coordinates must not be code").get_table(); if(!table) - PTHROW(0, 0, + throw Exception(0, &method_name, "coordinates must be table"); @@ -550,13 +581,13 @@ static void _polybar(Request& r, const S gdImage *image=static_cast(r.self)->image; if(!image) - PTHROW(0, 0, + throw Exception(0, &method_name, "does not contain an image"); Table *table=params->as_no_junction(1, "coordinates must not be code").get_table(); if(!table) - PTHROW(0, 0, + throw Exception("parser.runtime", &method_name, "coordinates must be table"); @@ -617,7 +648,7 @@ public: /* ******************************** string ********************************** */ int string_width(const String& s){ - const char *cstr=s.cstr(String::UL_AS_IS); + const char *cstr=s.cstr(); int result=0; for(; *cstr; cstr++) result+=index_width(index_of(*cstr)); @@ -625,7 +656,7 @@ public: } void string_display(gdImage& image, int x, int y, const String& s){ - const char *cstr=s.cstr(String::UL_AS_IS); + const char *cstr=s.cstr(); if(cstr) for(; *cstr; cstr++) { int index=index_of(*cstr); index_display(image, x, y, index); @@ -651,7 +682,7 @@ static void _font(Request& r, const Stri monospace_width=0; if(!alphabet.size()) - PTHROW(0, 0, + throw Exception("parser.runtime", &method_name, "alphabet must not be empty"); @@ -673,11 +704,11 @@ static void _text(Request& r, const Stri if(vimage.font) vimage.font->string_display(*vimage.image, x, y, s); else - PTHROW(0, 0, + throw Exception("parser.runtime", &method_name, "set the font first"); else - PTHROW(0, 0, + throw Exception(0, &method_name, "does not contain an image"); } @@ -690,15 +721,13 @@ static void _length(Request& r, const St VImage& vimage=*static_cast(r.self); if(vimage.image) if(vimage.font) { - VInt& result=*new(pool) VInt(pool, vimage.font->string_width(s)); - result.set_name(method_name); - r.write_assign_lang(result); + r.write_no_lang(*new(pool) VInt(pool, vimage.font->string_width(s))); } else - PTHROW(0, 0, + throw Exception("parser.runtime", &method_name, "set the font first"); else - PTHROW(0, 0, + throw Exception(0, &method_name, "does not contain an image"); } @@ -708,7 +737,7 @@ static void _arc(Request& r, const Strin gdImage *image=static_cast(r.self)->image; if(!image) - PTHROW(0, 0, + throw Exception(0, &method_name, "does not contain an image"); @@ -727,7 +756,7 @@ static void _sector(Request& r, const St gdImage *image=static_cast(r.self)->image; if(!image) - PTHROW(0, 0, + throw Exception(0, &method_name, "does not contain an image"); @@ -746,7 +775,7 @@ static void _circle(Request& r, const St gdImage *image=static_cast(r.self)->image; if(!image) - PTHROW(0, 0, + throw Exception(0, &method_name, "does not contain an image"); @@ -766,26 +795,25 @@ gdImage& as_image(Pool& pool, const Stri Value& value=params->as_no_junction(index, msg); if(strcmp(value.type(), VIMAGE_TYPE)!=0) - PTHROW(0, 0, + throw Exception("parser.runtime", &method_name, msg); gdImage *src=static_cast(&value)->image; if(!src) - PTHROW(0, 0, + throw Exception("parser.runtime", &method_name, msg); return *src; } -// ^image.copy[source](src x;src y;src w;src h;dst x;dst y[;dest w[;dest h]]) static void _copy(Request& r, const String& method_name, MethodParams *params) { Pool& pool=r.pool(); gdImage *dest=static_cast(r.self)->image; if(!dest) - PTHROW(0, 0, + throw Exception(0, &method_name, "self does not contain an image"); @@ -799,20 +827,20 @@ static void _copy(Request& r, const Stri int dy=params->as_int(6, "dest_y must be int", r); if(params->size()>1+2+2+2) { int dw=params->as_int(1+2+2+2, "dest_w must be int", r); - int dh=params->size()>1+2+2+2+1?params->as_int(1+2+2+2+1, "dest_h must be int", r):dw; + int dh=(int)(params->size()>1+2+2+2+1? + params->as_int(1+2+2+2+1, "dest_h must be int", r):sh*(((double)dw)/((double)sw))); + int tolerance=params->size()>1+2+2+2+2? + params->as_int(1+2+2+2+2, "tolerance must be int", r):150; - src.CopyResized(*dest, sx, sy, sw, sh, dx, dy, dw, dh); + src.CopyResampled(*dest, dx, dy, sx, sy, dw, dh, sw, sh, tolerance); } else - src.Copy(*dest, sx, sy, sw, sh, dx, dy); + src.Copy(*dest, dx, dy, sx, sy, sw, sh); } // constructor -MImage::MImage(Pool& apool) : Methoded(apool) { - set_name(*NEW String(pool(), IMAGE_CLASS_NAME)); - - +MImage::MImage(Pool& apool) : Methoded(apool, "image") { // ^image:measure[DATA] add_native_method("measure", Method::CT_DYNAMIC, _measure, 1, 1); @@ -873,8 +901,8 @@ MImage::MImage(Pool& apool) : Methoded(a // ^image.circle(center x;center y;r;color) add_native_method("circle", Method::CT_DYNAMIC, _circle, 4, 4); - // ^image.copy[source](src x;src y;src w;src h;dst x;dst y[;dest w[;dest h]]) - add_native_method("copy", Method::CT_DYNAMIC, _copy, 1+2+2+2, (1+2+2+2)+2); + // ^image.copy[source](src x;src y;src w;src h;dst x;dst y[;dest w[;dest h[;tolerance]]]) + add_native_method("copy", Method::CT_DYNAMIC, _copy, 1+2+2+2, (1+2+2+2)+2+1); } // global variable