--- parser3/src/classes/image.C 2001/04/10 13:24:49 1.2 +++ parser3/src/classes/image.C 2016/10/04 22:05:28 1.154 @@ -1,275 +1,1349 @@ /** @file Parser: @b image parser class. - Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com) - - Author: Alexander Petrosyan (http://design.ru/paf) + Copyright (c) 2001-2015 Art. Lebedev Studio (http://www.artlebedev.com) + Author: Alexandr Petrosian (http://paf.design.ru) +*/ - $Id: image.C,v 1.2 2001/04/10 13:24:49 paf 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" +#include "gif.h" -#ifdef WIN32 -# include "smtp/smtp.h" -#endif - +#include "pa_vmethod_frame.h" #include "pa_common.h" #include "pa_request.h" #include "pa_vfile.h" #include "pa_vimage.h" +#include "pa_vdate.h" +#include "pa_table.h" + +volatile const char * IDENT_IMAGE_C="$Id: image.C,v 1.154 2016/10/04 22:05:28 moko Exp $"; + +// defines + +static const String spacebar_width_name("space"); +static const String monospace_width_name("width"); +static const String letter_spacing_name("spacing"); + +// class + +class MImage: public Methoded { +public: // VStateless_class + Value* create_new_value(Pool&) { return new VImage(); } -// global var +public: + MImage(); +}; + +// globals -VStateless_class *image_class; +DECLARE_CLASS_VAR(image, new MImage); // helpers +#define EXIF_TAG(tag, name) put(tag, #name); + +/// value of exif tag -> it's value +class EXIF_tag_value2name: public Hash { +public: + EXIF_tag_value2name() { + // image JPEG Exif + // Tags used by IFD0 (main image) + EXIF_TAG(0x010e, ImageDescription); + EXIF_TAG(0x010f, Make); + EXIF_TAG(0x0110, Model); + EXIF_TAG(0x0112, Orientation); + EXIF_TAG(0x011a, XResolution); + EXIF_TAG(0x011b, YResolution); + EXIF_TAG(0x0128, ResolutionUnit); + EXIF_TAG(0x0131, Software); + EXIF_TAG(0x0132, DateTime); + EXIF_TAG(0x013e, WhitePoint); + EXIF_TAG(0x013f, PrimaryChromaticities); + EXIF_TAG(0x0211, YCbCrCoefficients); + EXIF_TAG(0x0213, YCbCrPositioning); + EXIF_TAG(0x0214, ReferenceBlackWhite); + EXIF_TAG(0x8298, Copyright); + EXIF_TAG(0x8769, ExifOffset); + // Tags used by Exif SubIFD + EXIF_TAG(0x829a, ExposureTime); + EXIF_TAG(0x829d, FNumber); + EXIF_TAG(0x8822, ExposureProgram); + EXIF_TAG(0x8827, ISOSpeedRatings); + EXIF_TAG(0x9000, ExifVersion); + EXIF_TAG(0x9003, DateTimeOriginal); + EXIF_TAG(0x9004, DateTimeDigitized); + EXIF_TAG(0x9101, ComponentsConfiguration); + EXIF_TAG(0x9102, CompressedBitsPerPixel); + EXIF_TAG(0x9201, ShutterSpeedValue); + EXIF_TAG(0x9202, ApertureValue); + EXIF_TAG(0x9203, BrightnessValue); + EXIF_TAG(0x9204, ExposureBiasValue); + EXIF_TAG(0x9205, MaxApertureValue); + EXIF_TAG(0x9206, SubjectDistance); + EXIF_TAG(0x9207, MeteringMode); + EXIF_TAG(0x9208, LightSource); + EXIF_TAG(0x9209, Flash); + EXIF_TAG(0x920a, FocalLength); + EXIF_TAG(0x927c, MakerNote); + EXIF_TAG(0x9286, UserComment); + EXIF_TAG(0x9290, SubsecTime); + EXIF_TAG(0x9291, SubsecTimeOriginal); + EXIF_TAG(0x9292, SubsecTimeDigitized); + EXIF_TAG(0xa000, FlashPixVersion); + EXIF_TAG(0xa001, ColorSpace); + EXIF_TAG(0xa002, ExifImageWidth); + EXIF_TAG(0xa003, ExifImageHeight); + EXIF_TAG(0xa004, RelatedSoundFile); + EXIF_TAG(0xa005, ExifInteroperabilityOffset); + EXIF_TAG(0xa20e, FocalPlaneXResolution); + EXIF_TAG(0xa20f, FocalPlaneYResolution); + EXIF_TAG(0xa210, FocalPlaneResolutionUnit); + EXIF_TAG(0xa215, ExposureIndex); + EXIF_TAG(0xa217, SensingMethod); + EXIF_TAG(0xa300, FileSource); + EXIF_TAG(0xa301, SceneType); + EXIF_TAG(0xa302, CFAPattern); + // Misc Tags + EXIF_TAG(0x00fe, NewSubfileType); + EXIF_TAG(0x00ff, SubfileType); + EXIF_TAG(0x012d, TransferFunction); + EXIF_TAG(0x013b, Artist); + EXIF_TAG(0x013d, Predictor); + EXIF_TAG(0x0142, TileWidth); + EXIF_TAG(0x0143, TileLength); + EXIF_TAG(0x0144, TileOffsets); + EXIF_TAG(0x0145, TileByteCounts); + EXIF_TAG(0x014a, SubIFDs); + EXIF_TAG(0x015b, JPEGTables); + EXIF_TAG(0x828d, CFARepeatPatternDim); + EXIF_TAG(0x828e, CFAPattern); + EXIF_TAG(0x828f, BatteryLevel); + EXIF_TAG(0x83bb, IPTC/NAA); + EXIF_TAG(0x8773, InterColorProfile); + EXIF_TAG(0x8824, SpectralSensitivity); + //EXIF_TAG(0x8825, GPSInfo); + EXIF_TAG(0x8828, OECF); + EXIF_TAG(0x8829, Interlace); + EXIF_TAG(0x882a, TimeZoneOffset); + EXIF_TAG(0x882b, SelfTimerMode); + EXIF_TAG(0x920b, FlashEnergy); + EXIF_TAG(0x920c, SpatialFrequencyResponse); + EXIF_TAG(0x920d, Noise); + EXIF_TAG(0x9211, ImageNumber); + EXIF_TAG(0x9212, SecurityClassification); + EXIF_TAG(0x9213, ImageHistory); + EXIF_TAG(0x9214, SubjectLocation); + EXIF_TAG(0x9215, ExposureIndex); + EXIF_TAG(0x9216, TIFF/EPStandardID); + EXIF_TAG(0xa20b, FlashEnergy); + EXIF_TAG(0xa20c, SpatialFrequencyResponse); + EXIF_TAG(0xa214, SubjectLocation); + + // additional things added by misha@ + EXIF_TAG(0x0100, ImageWidth); + EXIF_TAG(0x0101, ImageLength); + EXIF_TAG(0x0102, BitsPerSample); + EXIF_TAG(0x0103, Compression); + EXIF_TAG(0x0106, PhotometricInterpretation); + EXIF_TAG(0x010a, FillOrder); + EXIF_TAG(0x010d, DocumentName); + EXIF_TAG(0x0111, StripOffsets); + EXIF_TAG(0x0115, SamplesPerPixel); + EXIF_TAG(0x0116, RowsPerStrip); + EXIF_TAG(0x0117, StripByteCounts); + EXIF_TAG(0x011c, PlanarConfiguration); + EXIF_TAG(0x0156, TransferRange); + EXIF_TAG(0x0200, JPEGProc); + EXIF_TAG(0x0201, JPEGInterchangeFormat); + EXIF_TAG(0x0202, JPEGInterchangeFormatLength); + EXIF_TAG(0x0212, YCbCrSubSampling); + EXIF_TAG(0xa401, CustomRendered); + EXIF_TAG(0xa402, ExposureMode); + EXIF_TAG(0xa403, WhiteBalance); + EXIF_TAG(0xa404, DigitalZoomRatio); + EXIF_TAG(0xa405, FocalLengthIn35mmFilm); + EXIF_TAG(0xa406, SceneCaptureType); + EXIF_TAG(0xa407, GainControl); + EXIF_TAG(0xa408, Contrast); + EXIF_TAG(0xa409, Saturation); + EXIF_TAG(0xa40a, Sharpness); + EXIF_TAG(0xa40b, DeviceSettingDescription); + EXIF_TAG(0xa40c, SubjectDistanceRange); + EXIF_TAG(0xa420, ImageUniqueID); + + // other tags + EXIF_TAG(0xa430, CameraOwnerName); + EXIF_TAG(0xa431, BodySerialNumber); + EXIF_TAG(0xa432, LensSpecification); + EXIF_TAG(0xa433, LensManufactor); + EXIF_TAG(0xa434, LensModel); + EXIF_TAG(0xa435, LensSerialNumber); + } +} exif_tag_value2name; + +class EXIF_gps_tag_value2name: public Hash { +public: + EXIF_gps_tag_value2name() { + EXIF_TAG(0x0, GPSVersionID); + EXIF_TAG(0x1, GPSLatitudeRef); + EXIF_TAG(0x2, GPSLatitude); + EXIF_TAG(0x3, GPSLongitudeRef); + EXIF_TAG(0x4, GPSLongitude); + EXIF_TAG(0x5, GPSAltitudeRef); + EXIF_TAG(0x6, GPSAltitude); + EXIF_TAG(0x7, GPSTimeStamp); + EXIF_TAG(0x8, GPSSatellites); + EXIF_TAG(0x9, GPSStatus); + EXIF_TAG(0xA, GPSMeasureMode); + EXIF_TAG(0xB, GPSDOP); + EXIF_TAG(0xC, GPSSpeedRef); + EXIF_TAG(0xD, GPSSpeed); + EXIF_TAG(0xE, GPSTrackRef); + EXIF_TAG(0xF, GPSTrack); + EXIF_TAG(0x10, GPSImgDirectionRef); + EXIF_TAG(0x11, GPSImgDirection); + EXIF_TAG(0x12, GPSMapDatum); + EXIF_TAG(0x13, GPSDestLatitudeRef); + EXIF_TAG(0x14, GPSDestLatitude); + EXIF_TAG(0x15, GPSDestLongitudeRef); + EXIF_TAG(0x16, GPSDestLongitude); + EXIF_TAG(0x17, GPSDestBearingRef); + EXIF_TAG(0x18, GPSDestBearing); + EXIF_TAG(0x19, GPSDestDistanceRef); + EXIF_TAG(0x1A, GPSDestDistance); + EXIF_TAG(0x1B, GPSProcessingMethod); + EXIF_TAG(0x1C, GPSAreaInformation); + EXIF_TAG(0x1D, GPSDateStamp); + EXIF_TAG(0x1E, GPSDifferential); + } +} exif_gps_tag_value2name; + +#undef EXIF_TAG + +#ifndef DOXYGEN class Measure_reader { public: - enum { READ_CHUNK_SIZE=10*0x400 }; // 10K - typedef size_t (*Func)(void *& buf, size_t limit, void *info); + virtual size_t read(const char* &buf, size_t limit)=0; + virtual void seek(long value, int whence)=0; + virtual long tell()=0; +}; - Measure_reader(Func afunc, void *ainfo) : - func(afunc), info(ainfo), - chunk(0), offset(0), size(0) { +class Measure_file_reader: public Measure_reader { + const String& file_name; + int f; + +public: + Measure_file_reader(int af, const String& afile_name): + file_name(afile_name), f(af) { } - size_t read(unsigned char *& buf, size_t limit) { - if(!size) // nothing left - size=(*func)(chunk, READ_CHUNK_SIZE, info); - if(!size) // EOF + override size_t read(const char* &abuf, size_t limit) { + if(limit==0) return 0; - - // something left - size_t read_size=min(offset+limit, size)-offset; - buf=((unsigned char *)chunk)+offset; - offset+=read_size; + + char* lbuf=new(PointerFreeGC) char[limit]; + ssize_t read_size=::read(f, lbuf, limit); abuf=lbuf; + if(read_size<0) + throw Exception(0, &file_name, "measure read failed: %s (%d)", strerror(errno), errno); return read_size; } -private: - Func func; - void *info; + override void seek(long value, int whence) { + if(lseek(f, value, whence)<0) + throw Exception(IMAGE_FORMAT, &file_name, "seek(value=%ld, whence=%d) failed: %s (%d)", value, whence, strerror(errno), errno); + } + + override long tell() { return lseek(f, 0, SEEK_CUR); } + +}; + +class Measure_buf_reader: public Measure_reader { + + const char* buf; size_t size; + const String& file_name; - void *chunk; size_t offset; - size_t size; + +public: + Measure_buf_reader(const char* abuf, size_t asize, const String& afile_name): + buf(abuf), size(asize), file_name(afile_name), offset(0) { + } + + override size_t read(const char* &abuf, size_t limit) { + size_t to_read=min(limit, size-offset); + abuf=buf+offset; + offset+=to_read; + return to_read; + } + + override void seek(long value, int whence) { + size_t new_offset; + switch(whence) { + case SEEK_CUR: new_offset=offset+value; break; + case SEEK_SET: new_offset=(size_t)value; break; + default: + throw Exception(0, + 0, + "whence #%d not supported", 0, whence); + break; // never + } + + if((ssize_t)new_offset<0 || new_offset>size) + throw Exception(IMAGE_FORMAT, + &file_name, + "seek(value=%l, whence=%d) failed: out of buffer, new_offset>size (%l>%l) or new_offset<0", + value, whence, new_offset, size); + offset=new_offset; + } + + override long tell() { return offset; } + +}; + +#endif + +/// PNG file header +struct PNG_Header { + char dummy[12]; + char signature[4]; //< must be "IHDR" + uchar high_width[2]; //< image width high bytes [we ignore for now] + uchar width[2]; //< image width low bytes + uchar high_height[2]; //< image height high bytes [we ignore for now] + uchar height[4]; //< image height }; -// GIF +/// 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]; + uchar width[2]; + uchar height[2]; char dif; char fonColor; 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 -}; -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 record head +struct JPG_Segment_head { + uchar marker; + uchar code; + uchar length[2]; +}; +/// JPEG frame header +struct JPG_Size_segment_body { + char data; //< data precision of bits/sample + uchar height[2]; //< image height + uchar width[2]; //< image width + char numComponents; //< number of color components }; +/// JPEG frame header +struct JPG_Exif_segment_begin { + char signature[6]; // Exif\0\0 +}; + +/// JPEG Exif TIFF Header +struct JPG_Exif_TIFF_header { + uchar byte_align_identifier[2]; + char dummy[2]; // always 000A [or 0A00] + uchar first_IFD_offset[4]; // Usually the first IFD starts immediately next to TIFF header, so this offset has value '0x00000008'. +}; + +// JPEG Exif IFD start +struct JPG_Exif_IFD_begin { + uchar directory_entry_count[2]; // the number of directory entry contains in this IFD +}; + +// TTTT ffff NNNNNNNN DDDDDDDD +struct JPG_Exif_IFD_entry { + uchar tag[2]; // Tag number, this shows a kind of data + uchar format[2]; // data format + uchar components_count[4]; // number of components + uchar value_or_offset_to_it[4]; // data value or offset to data value +}; + +#define JPG_IFD_TAG_EXIF_OFFSET 0x8769 + +#define JPG_IFD_TAG_EXIF_GPS_OFFSET 0x8825 + +#define JPEG_EXIF_DATE_CHARS 20 + // -inline short bytes_to_int(unsigned char HI, unsigned char LO) { - return (short)((HI<<8) + LO); +inline ushort x_endian_to_ushort(uchar b0, uchar b1) { + return (ushort)((b1<<8) + b0); } -void measure_gif(Pool& pool, const String *origin_string, - Measure_reader& reader, int& width, int& height) { +inline uint x_endian_to_uint(uchar b0, uchar b1, uchar b2, uchar b3) { + return (uint)(((((b3<<8) + b2)<<8)+b1)<<8)+b0; +} - unsigned char *buf; - const int head_size=sizeof(GIF_Header); - if(reader.read(buf, head_size)(buf); - if(strncmp(screenD.type, "GIF", 3)!=0) - PTHROW(0, 0, - origin_string, - "bad image file - GIF signature not found"); +inline ushort endian_to_ushort(bool is_big, const uchar *b/* [2] */) { + return is_big?x_endian_to_ushort(b[1], b[0]): + x_endian_to_ushort(b[0], b[1]); +} - width=bytes_to_int(screenD.width[1], screenD.width[0]); - height=bytes_to_int(screenD.height[1], screenD.height[0]); +inline uint endian_to_uint(bool is_big, const uchar *b /* [4] */) { + return is_big?x_endian_to_uint(b[3], b[2], b[1], b[0]): + x_endian_to_uint(b[0], b[1], b[2], b[3]); } -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; +static void measure_gif(const String& origin_string, Measure_reader& reader, ushort& width, ushort& height) { - unsigned char *screenD_buf; - unsigned char *h_buf; - - bool flag=false; - - unsigned char *prefix; - const prefix_size=2; - if(reader.read(prefix, prefix_size)signature, "GIF", 3)!=0) + throw Exception(IMAGE_FORMAT, + &origin_string, + "not GIF file - wrong signature"); + + width=endian_to_ushort(false, head->width); + height=endian_to_ushort(false, head->height); +} + +static Value* parse_IFD_entry_formatted_one_value( + bool is_big, + ushort format, + size_t component_size, + const uchar *value) { + switch(format) { + case 1: // unsigned byte + return new VInt((uchar)value[0]); + case 3: // unsigned short + return new VInt(endian_to_ushort(is_big, value)); + case 4: // unsigned long + // 'double' because parser's Int is signed + return new VDouble(endian_to_uint(is_big, value)); + case 5: // unsigned rational + { + uint numerator=endian_to_uint(is_big, value); value+=component_size/2; + uint denominator=endian_to_uint(is_big, value); + if(!denominator) + return 0; + return new VDouble(((double)numerator)/denominator); + } + case 6: // signed byte + return new VInt((signed char)value[0]); + case 8: // signed short + return new VInt((signed short)endian_to_ushort(is_big, value)); + case 9: // signed long + return new VInt((signed int)endian_to_uint(is_big, value)); + case 10: // signed rational + { + signed int numerator=(signed int)endian_to_uint(is_big, value); value+=component_size/2; + uint denominator=endian_to_uint(is_big, value); + if(!denominator) + return 0; + return new VDouble(numerator/denominator); + } + /* + case 11: // single float + @todo + case 12: // double float + @todo + */ + }; - if(((unsigned char *)prefix)[1]!=SOI) - PTHROW(0, 0, - origin_string, - "broken JPEG file - second byte of header is not 0x%02X", SOI); - - unsigned char zero=0; - unsigned char *marker=&zero; + return 0; +} - do { - while((*marker)!=0xFF) - if(reader.read(marker, sizeof(char))<=0) break; - if(reader.read(marker, sizeof(char))<=0) break; - switch(*marker) { - case EOI: - marker=&zero; - break; - case APP0: - if(!flag) { - flag=true; - if(reader.read(screenD_buf, sizeof(JFIF_Header)) < sizeof(JFIF_Header)) - break; - JFIF_Header& screenD=*reinterpret_cast(screenD_buf); - if((bytes_to_int(screenD.length[0], screenD.length[1]) < 16) || - strcasecmp(screenD.identifier, "JFIF")) flag=false; +// date.C +tm cstr_to_time_t(char *, const char **); + +static Value* parse_IFD_entry_formatted_value(bool is_big, ushort format, + size_t component_size, uint components_count, + const uchar *value) { + if(format==2) { // ascii string, exception: the only type with varying size + const char* cstr=(const char* )value; + size_t length=components_count; + // Data format is "YYYY:MM:DD HH:MM:SS"+0x00, total 20bytes + if(length==JPEG_EXIF_DATE_CHARS + && isdigit((unsigned char)cstr[0]) + && cstr[length-1]==0) { + char cstr_writable[JPEG_EXIF_DATE_CHARS]; + strcpy(cstr_writable, cstr); + + try { + tm tmIn=cstr_to_time_t(cstr_writable, 0); + return new VDate(tmIn); } - break; - case SOF0: - case SOF2: - if(reader.read(h_buf, sizeof(JPG_Frame))hash(); + for(uint i=0; i=sizeof(format2component_size)/sizeof(format2component_size[0])) + return 0; // format out of range, ignoring + + size_t component_size=format2component_size[format]; + if(component_size==0) + return 0; // undefined format + + // You can get the total data byte length by multiplies + // a 'bytes/components' value (see above chart) by number of components stored 'NNNNNNNN' area + uint components_count=endian_to_uint(is_big, entry.components_count); + uint value_size=component_size*components_count; + // If its size is over 4bytes, 'DDDDDDDD' contains the offset to data stored address + Value* result; + + if(value_size<=4) + result=parse_IFD_entry_formatted_value( + is_big, format, + component_size, components_count, + entry.value_or_offset_to_it); + else { + long remembered=reader.tell(); + { + reader.seek(tiff_base+endian_to_uint(is_big, entry.value_or_offset_to_it), SEEK_SET); + const char* value; + if(reader.read(value, value_size)directory_entry_count); + for(int i=0; isignature, "Exif\0\0", 4+2)!=0) //signature invalid? + return 0; // ignore invalid block + + uint tiff_base=reader.tell(); + if(reader.read(buf, sizeof(JPG_Exif_TIFF_header))byte_align_identifier[0]=='M'; // [M]otorola vs [I]ntel + + uint first_IFD_offset=endian_to_uint(is_big, head->first_IFD_offset); + reader.seek(tiff_base+first_IFD_offset, SEEK_SET); + + VHash* vhash=new VHash; + + // IFD + parse_IFD(vhash->hash(), is_big, reader, tiff_base); + + return vhash; +} + +static void measure_jpeg(const String& origin_string, Measure_reader& reader, ushort& width, ushort& height, Value** exif) { + // JFIF format markers + const uchar MARKER=0xFF; + const uchar CODE_SIZE_A=0xC0; + const uchar CODE_SIZE_B=0xC1; + const uchar CODE_SIZE_C=0xC2; + const uchar CODE_SIZE_D=0xC3; + const uchar CODE_EXIF=0xE1; + + const char* buf; + const size_t prefix_size=2; + if(reader.read(buf, prefix_size)(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"); + if(!(signature[0]==0xFF && signature[1]==0xD8)) + throw Exception(IMAGE_FORMAT, + &origin_string, + "not JPEG file - wrong signature"); + + while(true) { + uint segment_base=reader.tell()+2/*marker,code*/; + if(reader.read(buf, sizeof(JPG_Segment_head))marker!=MARKER) + throw Exception(IMAGE_FORMAT, + &origin_string, + "not JPEG file - marker not found"); + + switch(head->code) { + // http://park2.wakwak.com/~tsuruzoh/Computer/Digicams/exif-e.html + case CODE_EXIF: + if(exif && !*exif) // seen .jpg with some xml under EXIF tag, after real exif block :) + *exif=parse_exif(reader, origin_string); + break; + + case CODE_SIZE_A: + case CODE_SIZE_B: + case CODE_SIZE_C: + case CODE_SIZE_D: + { + // Segments that contain size info + if(reader.read(buf, sizeof(JPG_Size_segment_body))width); + height=endian_to_ushort(true, body->height); + } + return; + }; + + reader.seek(segment_base+endian_to_ushort(true, head->length), SEEK_SET); + } + + throw Exception(IMAGE_FORMAT, + &origin_string, + "broken JPEG file - size frame not found"); +} + +static void measure_png(const String& origin_string, Measure_reader& reader, ushort& width, ushort& height) { + + const char* buf; + const size_t head_size=sizeof(PNG_Header); + if(reader.read(buf, head_size)signature, "IHDR", 4)!=0) + throw Exception(IMAGE_FORMAT, &origin_string, "not PNG file - wrong signature"); + + width=endian_to_ushort(true, head->width); + height=endian_to_ushort(true, 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(), '.')) { +static void measure(const String& file_name, Measure_reader& reader, ushort& width, ushort& height, Value** exif) { + const char* file_name_cstr=file_name.taint_cstr(String::L_FILE_SPEC); + if(const char* cext=strrchr(file_name_cstr, '.')) { cext++; if(strcasecmp(cext, "GIF")==0) - measure_gif(pool, &file_name, reader, width, height); + measure_gif(file_name, reader, width, height); else if(strcasecmp(cext, "JPG")==0 || strcasecmp(cext, "JPEG")==0) - measure_jpeg(pool, &file_name, reader, width, height); + measure_jpeg(file_name, reader, width, height, exif); + else if(strcasecmp(cext, "PNG")==0) + measure_png(file_name, reader, width, height); else - PTHROW(0, 0, - &file_name, - "unhandled image file name extension '%s'", cext); + throw Exception(IMAGE_FORMAT, &file_name, "unhandled image file name extension '%s'", cext); } else - PTHROW(0, 0, - &file_name, - "can not determine image type - no file name extension"); + throw Exception(IMAGE_FORMAT, &file_name, "can not determine image type - no file name extension"); } -// read from somewhere +// methods -struct Read_mem_info { - unsigned char *ptr; - unsigned char *eof; +#ifndef DOXYGEN +struct File_measure_action_info { + ushort* width; + ushort* height; + Value** exif; }; -static size_t read_mem(void*& buf, size_t limit, void *info) { - Read_mem_info& rmi=*static_cast(info); - buf=rmi.ptr; - size_t read_size=min(limit, (size_t)(rmi.eof-rmi.ptr)); - rmi.ptr+=read_size; - return read_size; +#endif +static void file_measure_action(struct stat& /*finfo*/, int f, const String& file_spec, void *context) { + File_measure_action_info& info=*static_cast(context); + + Measure_file_reader reader(f, file_spec); + measure(file_spec, reader, *info.width, *info.height, info.exif); } -struct Read_disk_info { - const String *file_spec; - size_t offset; +static void _measure(Request& r, MethodParams& params) { + Value& data=params.as_no_junction(0, "data must not be code"); + + ushort width=0; + ushort height=0; + Value* exif=0; + const String* file_name; + if((file_name=data.get_string())) { + File_measure_action_info info={ + &width, &height, + &exif + }; + file_read_action_under_lock(r.absolute(*file_name), "measure", file_measure_action, &info); + } else { + VFile* vfile=data.as_vfile(String::L_AS_IS); + file_name=&vfile->fields().get(name_name)->as_string(); + Measure_buf_reader reader( + vfile->value_ptr(), + vfile->value_size(), + *file_name + ); + measure(*file_name, reader, width, height, &exif); + } + + GET_SELF(r, VImage).set(file_name, width, height, 0, exif); +} + +#ifndef DOXYGEN +struct Attrib_info { + String* tag; ///< html tag being constructed + HashStringValue* skip; ///< tag attributes not to append to tag string [to skip] }; -static size_t read_disk(void*& buf, size_t limit, void *info) { - Read_disk_info& rdi=*static_cast(info); - Pool& pool=rdi.file_spec->pool(); - - size_t read_size; - file_read(pool, *rdi.file_spec, - buf, read_size, - false/*as_text*/, - true/*fail_on_read_problem*/, - rdi.offset, limit); +#endif +static void append_attrib_pair( + HashStringValue::key_type key, + HashStringValue::value_type value, + Attrib_info* info) { + // skip user-specified, internal(starting with "line-") attributes and border attribute with empty value + if( + (info->skip && info->skip->get(key)) + || key.pos("line-")==0 + || (key=="border" && !value->is_defined()) + ) + return; + + // src="a.gif" width="123" ismap[=-1] + *info->tag << " " << key; + if(value->is_string() || value->as_int()>=0) + *info->tag << "=\"" << value->as_string() << "\""; +} +static void _html(Request& r, MethodParams& params) { + + String tag; + tag << "for_each(append_attrib_pair, &info); + } else + throw Exception(PARSER_RUNTIME, + 0, + "attributes must be hash"); + } + } - rdi.offset+=read_size; - return read_size; + { + Attrib_info info={&tag, attribs}; + fields.for_each(append_attrib_pair, &info); + } + tag << " />"; + r.write_pass_lang(tag); } -// methods +/// @test wrap FILE to auto-object +static gdImage* load(Request& r, + const String& file_name){ + const char* file_name_cstr=r.absolute(file_name).taint_cstr(String::L_FILE_SPEC); + if(FILE *f=fopen(file_name_cstr, "rb")) { + gdImage* image=new gdImage; + bool ok=image->CreateFromGif(f); + fclose(f); + if(!ok) + throw Exception(IMAGE_FORMAT, + &file_name, + "is not in GIF format"); + return image; + } else { + throw Exception("file.missing", + 0, + "can not open '%s'", file_name_cstr); + } +} + + +static void _load(Request& r, MethodParams& params) { + const String& file_name=params.as_string(0, FILE_NAME_MUST_NOT_BE_CODE); + + gdImage* image=load(r, file_name); + GET_SELF(r, VImage).set(&file_name, image->SX(), image->SY(), image); +} + +static void _create(Request& r, MethodParams& params) { + int width=params.as_int(0, "width must be int", r); + int height=params.as_int(1, "height must be int", r); + int bgcolor_value=0xffFFff; + if(params.count()>2) + bgcolor_value=params.as_int(2, "color must be int", r); + gdImage* image=new gdImage; + image->Create(width, height); + image->FilledRectangle(0, 0, width-1, height-1, image->Color(bgcolor_value)); + GET_SELF(r, VImage).set(0, width, height, image); +} + +static void _gif(Request& r, MethodParams& params) { + gdImage& image=GET_SELF(r, VImage).image(); + + const String *file_name=params.count()>0?¶ms.as_string(0, FILE_NAME_MUST_BE_STRING):0; + + gdBuf buf=image.Gif(); + + VFile& vfile=*new VFile; + + vfile.set_binary(false/*not tainted*/, (const char *)buf.ptr, buf.size, file_name, new VString(*new String("image/gif"))); + + r.write_no_lang(vfile); +} + +static void _line(Request& r, MethodParams& params) { + gdImage& image=GET_SELF(r, VImage).image(); + + image.Line( + params.as_int(0, "x0 must be int", r), + params.as_int(1, "y0 must be int", r), + params.as_int(2, "x1 must be int", r), + params.as_int(3, "y1 must be int", r), + image.Color(params.as_int(4, "color must be int", r))); +} + +static void _fill(Request& r, MethodParams& params) { + gdImage& image=GET_SELF(r, VImage).image(); + + image.Fill( + params.as_int(0, "x must be int", r), + params.as_int(1, "y must be int", r), + image.Color(params.as_int(2, "color must be int", r))); +} + +static void _rectangle(Request& r, MethodParams& params) { + gdImage& image=GET_SELF(r, VImage).image(); + + image.Rectangle( + params.as_int(0, "x0 must be int", r), + params.as_int(1, "y0 must be int", r), + params.as_int(2, "x1 must be int", r), + params.as_int(3, "y1 must be int", r), + image.Color(params.as_int(4, "color must be int", r))); +} + +static void _bar(Request& r, MethodParams& params) { + gdImage& image=GET_SELF(r, VImage).image(); + + image.FilledRectangle( + params.as_int(0, "x0 must be int", r), + params.as_int(1, "y0 must be int", r), + params.as_int(2, "x1 must be int", r), + params.as_int(3, "y1 must be int", r), + image.Color(params.as_int(4, "color must be int", r))); +} + +#ifndef DOXYGEN +static void add_point(Table::element_type row, + gdImage::Point **p) { + if(row->count()!=2) + throw Exception(0, + 0, + "coordinates table must contain two columns: x and y values"); + (**p).x=row->get(0)->as_int(); + (**p).y=row->get(1)->as_int(); + (*p)++; +} +#endif +#ifndef DOXYGEN +static void add_point(int x, int y, + gdImage::Point **p) { + (**p).x=x; + (**p).y=y; + (*p)++; +} +#endif +static void _replace(Request& r, MethodParams& params) { + int src_color=params.as_int(0, "src color must be int", r); + int dest_color=params.as_int(1, "dest color must be int", r); + + gdImage& image=GET_SELF(r, VImage).image(); + + gdImage::Point* all_p=0; + size_t count=0; + if(params.count() == 3){ + Table* table=params.as_table(2, "coordinates"); + count=table->count(); + all_p=new(PointerFreeGC) gdImage::Point[count]; + gdImage::Point* add_p=all_p; + table->for_each(add_point, &add_p); + } else { + int max_x=image.SX()-1; + int max_y=image.SY()-1; + if(max_x > 0 && max_y > 0){ + count=4; + all_p=new(PointerFreeGC) gdImage::Point[count]; + gdImage::Point* add_p=all_p; + add_point(0, 0, &add_p); + add_point(max_x, 0, &add_p); + add_point(max_x, max_y, &add_p); + add_point(0, max_y, &add_p); + } + } + + if(count) + image.FilledPolygonReplaceColor(all_p, count, image.Color(src_color), image.Color(dest_color)); +} + +static void _polyline(Request& r, MethodParams& params) { + gdImage& image=GET_SELF(r, VImage).image(); + + Table* table=params.as_table(1, "coordinates"); + + gdImage::Point* all_p=new(PointerFreeGC) gdImage::Point[table->count()]; + gdImage::Point *add_p=all_p; + table->for_each(add_point, &add_p); + image.Polygon(all_p, table->count(), + image.Color(params.as_int(0, "color must be int", r)), + false/*not closed*/); +} + +static void _polygon(Request& r, MethodParams& params) { + gdImage& image=GET_SELF(r, VImage).image(); + + Table* table=(Table*)params.as_table(1, "coordinates"); + + gdImage::Point* all_p=new(PointerFreeGC) gdImage::Point[table->count()]; + gdImage::Point *add_p=all_p; + table->for_each(add_point, &add_p); + image.Polygon(all_p, table->count(), + image.Color(params.as_int(0, "color must be int", r))); +} + +static void _polybar(Request& r, MethodParams& params) { + gdImage& image=GET_SELF(r, VImage).image(); + + Table* table=(Table*)params.as_table(1, "coordinates"); + + gdImage::Point* all_p=new(PointerFreeGC) gdImage::Point[table->count()]; + gdImage::Point *add_p=all_p; + table->for_each(add_point, &add_p); + image.FilledPolygon(all_p, table->count(), + image.Color(params.as_int(0, "color must be int", r))); +} + +// font + +#define Y(y)(y+index*height) + +// Font class + +Font::Font( + Charset& asource_charset, + const String& aalphabet, + gdImage* aifont, int aheight, int amonospace, int aspacebarspace, int aletterspacing): + fsource_charset(asource_charset), + height(aheight), + monospace(amonospace), + spacebarspace(aspacebarspace), + letterspacing(aletterspacing), + ifont(aifont), + alphabet(aalphabet) { + + if(fsource_charset.isUTF8()){ + size_t index=0; + for(UTF8_string_iterator i(alphabet); i.has_next(); ) + fletter2index.put_dont_replace(i.next(), index++); + } +} + +/* ******************************** char ********************************** */ + +size_t Font::index_of(char ch) { + if(ch==' ') return STRING_NOT_FOUND; + return alphabet.pos(ch); +} + +size_t Font::index_of(XMLCh ch) { + if(ch==' ') return STRING_NOT_FOUND; + return fletter2index.get(ch); +} + +int Font::index_width(size_t index) { + if(index==STRING_NOT_FOUND) + return spacebarspace; + int tr=ifont->GetTransparent(); + for(int x=ifont->SX()-1; x>=0; x--) { + for(int y=0; yGetPixel(x, Y(y))!=tr) + return x+1; + } + return 0; +} + +void Font::index_display(gdImage& image, int x, int y, size_t index){ + if(index!=STRING_NOT_FOUND) + ifont->Copy(image, x, y, 0, Y(0), index_width(index), height); +} + +/* ******************************** string ********************************** */ + +int Font::step_width(int index) { + return letterspacing + (monospace ? monospace : index_width(index)); +} -/// ^image:measure[DATA] -static void _measure(Request& r, const String& method_name, Array *params) { - Pool& pool=r.pool(); - - Value& data=*static_cast(params->get(0)); - // forcing [this body type] - r.fail_if_junction_(true, data, method_name, "data must not be code"); - - void *info; Measure_reader::Func read_func; - Read_mem_info read_mem_info; - Read_disk_info read_disk_info; - const String *file_name; - if(data.is_string()) { - 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; +// counts trailing letter_spacing, consider this OK. useful for contiuations +int Font::string_width(const String& s){ + const char* cstr=s.cstr(); + int result=0; + + if(fsource_charset.isUTF8()){ + for(UTF8_string_iterator i(s); i.has_next(); ) + result+=step_width(index_of(i.next())); } 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; + for(const char* current=cstr; *current; current++) + result+=step_width(index_of(*current)); + } + + return result; +} + +void Font::string_display(gdImage& image, int x, int y, const String& s){ + const char* cstr=s.cstr(); + + if(fsource_charset.isUTF8()){ + for(UTF8_string_iterator i(s); i.has_next(); ){ + size_t index=index_of(i.next()); + index_display(image, x, y, index); + x+=step_width(index); + } + } else { + for(const char* current=cstr; *current; current++) { + size_t index=index_of(*current); + index_display(image, x, y, index); + x+=step_width(index); + } + } +} + +// + + +static void _font(Request& r, MethodParams& params) { + const String& alphabet=params.as_string(0, "alphabet must not be code"); + size_t alphabet_length=alphabet.length(r.charsets.source()); + if(!alphabet_length) + throw Exception(PARSER_RUNTIME, + 0, + "alphabet must not be empty"); + + gdImage* image=load(r, params.as_string(1, FILE_NAME_MUST_NOT_BE_CODE)); + + int spacebar_width=image->SX(); + int monospace_width=0; // proportional + int letter_spacing=1; + if(params.count()>2){ + if(HashStringValue* options=params[2].get_hash()){ + // third option is hash + if(params.count()>3) + throw Exception(PARSER_RUNTIME, 0, "too many params were specified"); + int valid_options=0; + if(Value* vspacebar_width=options->get(spacebar_width_name)){ + valid_options++; + spacebar_width=r.process(*vspacebar_width).as_int(); + } + if(Value* vmonospace_width=options->get(monospace_width_name)){ + valid_options++; + monospace_width=r.process(*vmonospace_width).as_int(); + if(!monospace_width) + monospace_width=image->SX(); + } + if(Value* vletter_spacing=options->get(letter_spacing_name)){ + valid_options++; + letter_spacing=r.process(*vletter_spacing).as_int(); + } + if(valid_options!=options->count()) + throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION); + } else { + // backward + spacebar_width=params.as_int(2, "param must be int or hash", r); + if(params.count()>3) { + monospace_width=params.as_int(3, "monospace_width must be int", r); + if(!monospace_width) + monospace_width=image->SX(); + } + } } - Measure_reader reader(read_func, info); - int width, height; - measure(pool, *file_name, reader, width, height); + if(int remainder=image->SY() % alphabet_length) + throw Exception(PARSER_RUNTIME, + 0, + "font-file height(%d) not divisable by alphabet size(%d), remainder=%d", + image->SY(), alphabet_length, remainder); + + GET_SELF(r, VImage).set_font(new Font( + r.charsets.source(), + alphabet, + image, + image->SY() / alphabet_length, monospace_width, spacebar_width, letter_spacing)); +} + +static void _text(Request& r, MethodParams& params) { + int x=params.as_int(0, "x must be int", r); + int y=params.as_int(1, "y must be int", r); + const String& s=params.as_string(2, "text must not be code"); + + VImage& vimage=GET_SELF(r, VImage); + vimage.font().string_display(vimage.image(), x, y, s); +} + +static void _length(Request& r, MethodParams& params) { + const String& s=params.as_string(0, "text must not be code"); + + VImage& vimage=GET_SELF(r, VImage); + r.write_no_lang(*new VInt(vimage.font().string_width(s))); +} + +static void _arc(Request& r, MethodParams& params) { + gdImage& image=GET_SELF(r, VImage).image(); + + image.Arc( + params.as_int(0, "center_x must be int", r), + params.as_int(1, "center_y must be int", r), + params.as_int(2, "width must be int", r), + params.as_int(3, "height must be int", r), + params.as_int(4, "start degrees must be int", r), + params.as_int(5, "end degrees must be int", r), + image.Color(params.as_int(6, "cx must be int", r))); +} + +static void _sector(Request& r, MethodParams& params) { + gdImage& image=GET_SELF(r, VImage).image(); - static_cast(r.self)->set(*file_name, width, height); + image.Sector( + params.as_int(0, "center_x must be int", r), + params.as_int(1, "center_y must be int", r), + params.as_int(2, "width must be int", r), + params.as_int(3, "height must be int", r), + params.as_int(4, "start degrees must be int", r), + params.as_int(5, "end degrees must be int", r), + image.Color(params.as_int(6, "color must be int", r))); } -// initialize -void initialize_image_class(Pool& pool, VStateless_class& vclass) { +static void _circle(Request& r, MethodParams& params) { + gdImage& image=GET_SELF(r, VImage).image(); + + int size=params.as_int(2, "radius must be int", r)*2; + image.Arc( + params.as_int(0, "center_x must be int", r), + params.as_int(1, "center_y must be int", r), + size, //w + size, //h + 0, //s + 360, //e + image.Color(params.as_int(3, "color must be int", r))); +} + +gdImage& as_image(MethodParams& params, int index, const char* msg) { + Value& value=params.as_no_junction(index, msg); + + if(Value* vimage=value.as(VIMAGE_TYPE)) { + return static_cast(vimage)->image(); + } else + throw Exception(PARSER_RUNTIME, + 0, + msg); +} + +static void _copy(Request& r, MethodParams& params) { + gdImage& dest=GET_SELF(r, VImage).image(); + + gdImage& src=as_image(params, 0, "src must be image"); + + int sx=params.as_int(1, "src_x must be int", r); + int sy=params.as_int(2, "src_y must be int", r); + int sw=params.as_int(3, "src_w must be int", r); + int sh=params.as_int(4, "src_h must be int", r); + int dx=params.as_int(5, "dest_x must be int", r); + int dy=params.as_int(6, "dest_y must be int", r); + if(params.count()>1+2+2+2) { + int dw=params.as_int(1+2+2+2, "dest_w must be int", r); + int dh=(int)(params.count()>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.count()>1+2+2+2+2? + params.as_int(1+2+2+2+2, "tolerance must be int", r):150; + + src.CopyResampled(dest, dx, dy, sx, sy, dw, dh, sw, sh, tolerance); + } else + src.Copy(dest, dx, dy, sx, sy, sw, sh); +} + +static void _pixel(Request& r, MethodParams& params) { + gdImage& image=GET_SELF(r, VImage).image(); + + int x=params.as_int(0, "x must be int", r); + int y=params.as_int(1, "y must be int", r); + + if(params.count()>2) { + image.SetPixel(x, y, + image.Color(params.as_int(2, "color must be int", r))); + } else + r.write_no_lang(*new VInt(image.DecodeColor(image.GetPixel(x, y)))); +} + + +// constructor + +MImage::MImage(): Methoded("image") { // ^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, 1); + + // ^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)[table x:y] + // ^image.replace(color-source;color-dest) + add_native_method("replace", Method::CT_DYNAMIC, _replace, 2, 3); + + // ^image.polyline(color)[table x:y] + add_native_method("polyline", Method::CT_DYNAMIC, _polyline, 2, 2); + + // ^image.polygon(color)[table x:y] + add_native_method("polygon", Method::CT_DYNAMIC, _polygon, 2, 2); + + // ^image.polybar(color)[table x:y] + add_native_method("polybar", Method::CT_DYNAMIC, _polybar, 2, 2); + + // ^image.font[alPHAbet;font-file-name.gif] + // ^image.font[alPHAbet;font-file-name.gif](spacebar_width) + // ^image.font[alPHAbet;font-file-name.gif](spacebar_width;letter_width) + // ^image.font[alPHAbet;font-file-name.gif][$.space-width(.) $.letter-width(.) $.letter-space(.)] + add_native_method("font", Method::CT_DYNAMIC, _font, 2, 4); + + // ^image.text(x;y)[text] + add_native_method("text", Method::CT_DYNAMIC, _text, 3, 3); + + // ^image.length[text] + add_native_method("length", Method::CT_DYNAMIC, _length, 1, 1); + + // ^image.arc(center x;center y;width;height;start in degrees;end in degrees;color) + add_native_method("arc", Method::CT_DYNAMIC, _arc, 7, 7); + + // ^image.sector(center x;center y;width;height;start in degrees;end in degrees;color) + add_native_method("sector", Method::CT_DYNAMIC, _sector, 7, 7); + + // ^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[;tolerance]]]) + add_native_method("copy", Method::CT_DYNAMIC, _copy, 1+2+2+2, (1+2+2+2)+2+1); + + // ^image.pixel(x;y)[(color)] + add_native_method("pixel", Method::CT_DYNAMIC, _pixel, 2, 3); }