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| version 1.28, 2001/06/28 07:41:59 | version 1.98, 2003/11/20 15:35:29 |
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| Line 1 | Line 1 |
| /** @file | /** @file |
| Parser: @b image parser class. | Parser: @b image parser class. |
| Copyright(c) 2001 ArtLebedev Group(http://www.artlebedev.com) | Copyright(c) 2001-2003 ArtLebedev Group (http://www.artlebedev.com) |
| Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) | |
| */ | |
| Author: Alexander Petrosyan <paf@design.ru>(http://design.ru/paf) | static const char* IDENT_IMAGE_C="$Date$"; |
| $Id$ | /* |
| 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 | |
| */ | */ |
| static char *RCSId="$Id$"; | |
| #include "pa_config_includes.h" | #include "pa_config_includes.h" |
| #include "pa_vmethod_frame.h" | |
| #include "gif.h" | #include "gif.h" |
| #include "pa_common.h" | #include "pa_common.h" |
| #include "pa_request.h" | #include "pa_request.h" |
| #include "pa_vfile.h" | #include "pa_vfile.h" |
| #include "pa_vimage.h" | #include "pa_vimage.h" |
| #include "pa_vdate.h" | |
| // defines | #include "pa_table.h" |
| #define IMAGE_CLASS_NAME "image" | |
| // class | // class |
| class MImage : public Methoded { | class MImage: public Methoded { |
| public: // VStateless_class | public: // VStateless_class |
| Value *create_new_value(Pool& pool) { return new(pool) VImage(pool); } | Value* create_new_value(Pool&) { return new VImage(); } |
| public: | public: |
| MImage(Pool& pool); | MImage(); |
| public: // Methoded | public: // Methoded |
| bool used_directly() { return true; } | bool used_directly() { return true; } |
| }; | }; |
| // globals | |
| DECLARE_CLASS_VAR(image, new MImage, 0); | |
| // helpers | // helpers |
| /// simple buffered reader[from memory/file], used in _measure | /// value of exif tag -> it's value |
| class EXIF_tag_value2name: public Hash<int, const char*> { | |
| public: | |
| EXIF_tag_value2name() { | |
| // image JPEG Exif | |
| #define EXIF_TAG(tag, name) \ | |
| put(tag, #name); | |
| // 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); | |
| #undef EXIF_TAG | |
| } | |
| } exif_tag_value2name; | |
| #ifndef DOXYGEN | |
| class Measure_reader { | class Measure_reader { |
| public: | public: |
| enum { READ_CHUNK_SIZE=0x400 };// 1K | virtual size_t read(const char* &buf, size_t limit)=0; |
| typedef size_t(*Func)(void *& buf, size_t limit, void *info); | virtual void seek(long value, int whence)=0; |
| virtual long tell()=0; | |
| }; | |
| class Measure_file_reader: public Measure_reader { | |
| Measure_reader(Func afunc, void *ainfo) : | ; |
| func(afunc), info(ainfo), | const String& file_name; const char* fname; |
| chunk(0), offset(0), size(0) { | int f; |
| public: | |
| Measure_file_reader(int af, const String& afile_name, const char* afname): | |
| file_name(afile_name), fname(afname), f(af) { | |
| } | } |
| size_t read(unsigned char *& buf, size_t limit) { | override size_t read(const char* &abuf, size_t limit) { |
| if(offset+limit>size) // nothing left | if(limit==0) |
| 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 | |
| if(!size) // EOF | |
| return 0; | return 0; |
| // something left | char* lbuf=new(PointerFreeGC) char[limit]; |
| size_t read_size=min(offset+limit, size)-offset; | size_t read_size=(size_t)::read(f, lbuf, limit); abuf=lbuf; |
| buf=((unsigned char *)chunk)+offset; | if(ssize_t(read_size)<0 || read_size>limit) |
| offset+=read_size; | throw Exception(0, |
| &file_name, | |
| "measure failed: actually read %lu bytes count not in [0..%lu] valid range", | |
| read_size, limit); | |
| return read_size; | return read_size; |
| } | } |
| private: | override void seek(long value, int whence) { |
| Func func; | if(lseek(f, value, whence)<0) |
| void *info; | throw Exception("image.format", |
| &file_name, | |
| "seek(value=%ld, whence=%d) failed: %s (%d), actual filename '%s'", | |
| value, whence, strerror(errno), errno, fname); | |
| } | |
| 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 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 file header | /// GIF file header |
| struct GIF_Header { | struct GIF_Header { |
| char type[3]; // 'GIF' | char signature[3]; // 'GIF' |
| char version[3]; | char version[3]; |
| unsigned char width[2]; | uchar width[2]; |
| unsigned char height[2]; | uchar height[2]; |
| char dif; | char dif; |
| char fonColor; | char fonColor; |
| char nulls; | char nulls; |
| }; | }; |
| /// JPEG file header | /// JPEG record head |
| struct JFIF_Header { | struct JPG_Segment_head { |
| char length[2]; //< length of JFIF segment marker | uchar marker; |
| char identifier[5]; //< JFIF identifier | uchar code; |
| char version[2]; //< version | uchar length[2]; |
| 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 frame header | /// JPEG frame header |
| struct JPG_Frame { | struct JPG_Size_segment_body { |
| char length[2]; //< length of image marker | |
| char data; //< data precision of bits/sample | char data; //< data precision of bits/sample |
| char height[2]; //< image height | uchar height[2]; //< image height |
| char width[2]; //< image width | uchar width[2]; //< image width |
| char numComponents; //< number of color components | 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 JPEG_EXIF_DATE_CHARS 20 | |
| // | // |
| inline short bytes_to_int(unsigned char HI, unsigned char LO) { | inline ushort x_endian_to_ushort(uchar b0, uchar b1) { |
| return(short)((HI<<8) + LO); | return (ushort)((b1<<8) + b0); |
| } | |
| inline uint x_endian_to_uint(uchar b0, uchar b1, uchar b2, uchar b3) { | |
| return (uint)(((((b3<<8) + b2)<<8)+b1)<<8)+b0; | |
| } | |
| 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]); | |
| } | |
| 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_gif(Pool& pool, const String *origin_string, | static void measure_gif(const String& origin_string, |
| Measure_reader& reader, int& width, int& height) { | Measure_reader& reader, ushort& width, ushort& height) { |
| unsigned char *buf; | const char* buf; |
| const int head_size=sizeof(GIF_Header); | const int head_size=sizeof(GIF_Header); |
| if(reader.read(buf, head_size)<head_size) | if(reader.read(buf, head_size)<head_size) |
| PTHROW(0, 0, | throw Exception("image.format", |
| origin_string, | &origin_string, |
| "broken GIF header - file size is less then %d bytes", head_size); | "not GIF file - too small"); |
| GIF_Header *head=(GIF_Header *)buf; | |
| GIF_Header& screenD=*reinterpret_cast<GIF_Header *>(buf); | |
| if(strncmp(screenD.type, "GIF", 3)!=0) | if(strncmp(head->signature, "GIF", 3)!=0) |
| PTHROW(0, 0, | throw Exception("image.format", |
| origin_string, | &origin_string, |
| "bad image file - GIF signature not found"); | "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 | |
| */ | |
| }; | |
| return 0; | |
| } | |
| // date.C | |
| time_t cstr_to_time_t(char *cstr, bool fail_on_error); | |
| 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(cstr[0]) | |
| && cstr[length-1]==0) { | |
| char cstr_writable[JPEG_EXIF_DATE_CHARS]; | |
| strcpy(cstr_writable, cstr); | |
| time_t t=cstr_to_time_t(cstr_writable, | |
| false/* do not throw exception, just return bad result */); | |
| if(t>=0) | |
| return new VDate(t); | |
| } | |
| width=bytes_to_int(screenD.width[1], screenD.width[0]); | if(const char* premature_zero_pos=(const char* )memchr(cstr, 0, length)) |
| height=bytes_to_int(screenD.height[1], screenD.height[0]); | length=premature_zero_pos-cstr; |
| return new VString(*new String(cstr, length, true/*tainted*/)); | |
| } | |
| if(components_count==1) | |
| return parse_IFD_entry_formatted_one_value(is_big, format, component_size, value); | |
| VHash* result=new VHash; | |
| HashStringValue& hash=result->hash(); | |
| for(uint i=0; i<components_count; i++, value+=component_size) { | |
| hash.put( | |
| String::Body::Format(i), | |
| parse_IFD_entry_formatted_one_value(is_big, format, component_size, value)); | |
| } | |
| return result; | |
| } | } |
| void measure_jpeg(Pool& pool, const String *origin_string, | static Value* parse_IFD_entry_value( |
| Measure_reader& reader, int& width, int& height) { | bool is_big, Measure_reader& reader, long tiff_base, |
| // JFIF format markers | JPG_Exif_IFD_entry& entry) { |
| const unsigned char SOI=0xD8; | size_t format2component_size[]={ |
| const unsigned char EOI=0xD9; | 0, // undefined |
| const unsigned char APP0=0xE0; | 1, // unsigned byte |
| const unsigned char SOF0=0xC0; | 1, // ascii string |
| const unsigned char SOF2=0xC2; | 2, // unsigned short |
| const unsigned char COM=0xFE; | 4, // unsigned long |
| 8, // unsigned rational | |
| 1, // signed byte | |
| 0, // undefined | |
| 2, // signed short | |
| 4, // signed long | |
| 8, // signed rational | |
| /* | |
| 4, // single float | |
| 8, // double float | |
| */ | |
| }; | |
| ushort format=endian_to_ushort(is_big, entry.format); | |
| if(format>=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); | |
| size_t 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)<sizeof(value_size)) | |
| return 0; | |
| result=parse_IFD_entry_formatted_value( | |
| is_big, format, | |
| component_size, components_count, | |
| (const uchar*)value); | |
| } | |
| reader.seek(remembered, SEEK_SET); | |
| } | |
| unsigned char *screenD_buf; | return result; |
| unsigned char *h_buf=0; | } |
| bool flag=false; | static void parse_IFD(HashStringValue& hash, |
| bool is_big, Measure_reader& reader, long tiff_base); | |
| static void parse_IFD_entry(HashStringValue& hash, | |
| bool is_big, Measure_reader& reader, long tiff_base, | |
| JPG_Exif_IFD_entry& entry) { | |
| ushort tag=endian_to_ushort(is_big, entry.tag); | |
| if(tag==JPG_IFD_TAG_EXIF_OFFSET) { | |
| long remembered=reader.tell(); | |
| { | |
| reader.seek(tiff_base+endian_to_uint(is_big, entry.value_or_offset_to_it), SEEK_SET); | |
| parse_IFD(hash, is_big, reader, tiff_base); | |
| } | |
| reader.seek(remembered, SEEK_SET); | |
| return; | |
| } | |
| unsigned char *prefix; | if(Value* value=parse_IFD_entry_value(is_big, reader, tiff_base, entry)) { |
| if(const char* name=exif_tag_value2name.get(tag)) | |
| hash.put(String::Body(name), value); | |
| else | |
| hash.put(String::Body::Format(tag), value); | |
| } | |
| } | |
| static void parse_IFD( | |
| HashStringValue& hash, | |
| bool is_big, Measure_reader& reader, long tiff_base) { | |
| const char* buf; | |
| if(reader.read(buf, sizeof(JPG_Exif_IFD_begin))<sizeof(JPG_Exif_IFD_begin)) | |
| return; | |
| JPG_Exif_IFD_begin *start=(JPG_Exif_IFD_begin *)buf; | |
| ushort directory_entry_count=endian_to_ushort(is_big, start->directory_entry_count); | |
| for(int i=0; i<directory_entry_count; i++) { | |
| if(reader.read(buf, sizeof(JPG_Exif_IFD_entry))<sizeof(JPG_Exif_IFD_entry)) | |
| return; | |
| parse_IFD_entry(hash, is_big, reader, tiff_base, *(JPG_Exif_IFD_entry *)buf); | |
| } | |
| // then goes: LLLLLLLL Offset to next IFD [not going there] | |
| } | |
| static Value* parse_exif(Measure_reader& reader, const String& origin_string) { | |
| const char* buf; | |
| if(reader.read(buf, sizeof(JPG_Exif_segment_begin))<sizeof(JPG_Exif_segment_begin)) | |
| throw Exception("image.format", | |
| &origin_string, | |
| "not JPEG file - can not fully read Exif segment start"); | |
| JPG_Exif_segment_begin *start=(JPG_Exif_segment_begin *)buf; | |
| if(memcmp(start->signature, "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))<sizeof(JPG_Exif_TIFF_header)) | |
| return 0; | |
| JPG_Exif_TIFF_header *head=(JPG_Exif_TIFF_header *)buf; | |
| bool is_big=head->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; | const size_t prefix_size=2; |
| if(reader.read(prefix, prefix_size)<prefix_size) | if(reader.read(buf, prefix_size)<prefix_size) |
| PTHROW(0, 0, | throw Exception("image.format", |
| origin_string, | &origin_string, |
| "broken JPEG file - size is less then %d bytes", prefix_size); | "not JPEG file - too small"); |
| uchar *signature=(uchar *)buf; | |
| if(((unsigned char *)prefix)[1]!=SOI) | if(!(signature[0]==0xFF && signature[1]==0xD8)) |
| PTHROW(0, 0, | throw Exception("image.format", |
| origin_string, | &origin_string, |
| "broken JPEG file - second byte of header is not 0x%02X", SOI); | "not JPEG file - wrong signature"); |
| unsigned char zero=0; | while(true) { |
| unsigned char *marker=&zero; | uint segment_base=reader.tell()+2/*marker,code*/; |
| if(reader.read(buf, sizeof(JPG_Segment_head))<sizeof(JPG_Segment_head)) | |
| 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<JFIF_Header *>(screenD_buf); | |
| if((bytes_to_int(screenD.length[0], screenD.length[1]) < 16) || | |
| strcasecmp(screenD.identifier, "JFIF")) flag=false; | |
| } | |
| break; | break; |
| case SOF0: | JPG_Segment_head *head=(JPG_Segment_head *)buf; |
| case SOF2: | |
| if(reader.read(h_buf, sizeof(JPG_Frame))<sizeof(JPG_Frame)) | // Verify that it's a valid segment. |
| flag=false; | if(head->marker!=MARKER) |
| throw Exception("image.format", | |
| &origin_string, | |
| "not JPEG file - marker not found"); | |
| switch(head->code) { | |
| // http://www.ba.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; | break; |
| default: break; | |
| } | case CODE_SIZE_A: |
| } while(*marker!=EOI); | case CODE_SIZE_B: |
| case CODE_SIZE_C: | |
| if(flag && h_buf) { | case CODE_SIZE_D: |
| JPG_Frame& h=*reinterpret_cast<JPG_Frame *>(h_buf); | { |
| width=bytes_to_int(h.width[0], h.width[1]); | // Segments that contain size info |
| height=bytes_to_int(h.height[0], h.height[1]); | if(reader.read(buf, sizeof(JPG_Size_segment_body))<sizeof(JPG_Size_segment_body)) |
| } else | throw Exception("image.format", |
| PTHROW(0, 0, | &origin_string, |
| origin_string, | "not JPEG file - can not fully read Size segment"); |
| "broken JPEG file - APP0 frame not found"); | JPG_Size_segment_body *body=(JPG_Size_segment_body *)buf; |
| width=endian_to_ushort(true, 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 int head_size=sizeof(PNG_Header); | |
| if(reader.read(buf, head_size)<head_size) | |
| throw Exception("image.format", | |
| &origin_string, | |
| "not PNG file - too small"); | |
| PNG_Header *head=(PNG_Header *)buf; | |
| if(strncmp(head->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 | // measure center |
| void measure(Pool& pool, const String& file_name, | static void measure(const String& file_name, |
| Measure_reader& reader, int& width, int& height) { | Measure_reader& reader, ushort& width, ushort& height, Value** exif) { |
| if(const char *cext=strrchr(file_name.cstr(), '.')) { | const char* file_name_cstr=file_name.cstr(String::L_FILE_SPEC); |
| if(const char* cext=strrchr(file_name_cstr, '.')) { | |
| cext++; | cext++; |
| if(strcasecmp(cext, "GIF")==0) | 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) | 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 | else |
| PTHROW(0, 0, | throw Exception("image.format", |
| &file_name, | &file_name, |
| "unhandled image file name extension '%s'", cext); | "unhandled image file name extension '%s'", cext); |
| } else | } else |
| PTHROW(0, 0, | throw Exception("image.format", |
| &file_name, | &file_name, |
| "can not determine image type - no file name extension"); | "can not determine image type - no file name extension"); |
| } | } |
| /// used by image: _measure / read_mem | |
| struct Read_mem_info { | |
| unsigned char *ptr; | |
| unsigned char *eof; | |
| }; | |
| static size_t read_mem(void*& buf, size_t limit, void *info) { | |
| Read_mem_info& rmi=*static_cast<Read_mem_info *>(info); | |
| buf=rmi.ptr; | |
| size_t read_size=min(limit, (size_t)(rmi.eof-rmi.ptr)); | |
| rmi.ptr+=read_size; | |
| return read_size; | |
| } | |
| /// used by image: _measure / read_disk | |
| struct Read_disk_info { | |
| const String *file_spec; | |
| size_t offset; | |
| }; | |
| static size_t read_disk(void*& buf, size_t limit, void *info) { | |
| Read_disk_info& rdi=*static_cast<Read_disk_info *>(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); | |
| rdi.offset+=read_size; | |
| return read_size; | |
| } | |
| // methods | // methods |
| static void _measure(Request& r, const String& method_name, MethodParams *params) { | #ifndef DOXYGEN |
| Pool& pool=r.pool(); | struct File_measure_action_info { |
| ushort* width; | |
| Value& data=params->get_no_junction(0, "data must not be code"); | ushort* height; |
| Value** exif; | |
| void *info;Measure_reader::Func read_func; | const String* file_name; |
| Read_mem_info read_mem_info; | }; |
| Read_disk_info read_disk_info; | #endif |
| const String *file_name; | static void file_measure_action( |
| if(data.is_string()) { | struct stat& /*finfo*/, int f, |
| file_name=data.get_string(); | const String& /*file_spec*/, const char* fname, bool /*as_text*/, |
| read_disk_info.file_spec=&r.absolute(*file_name); | void *context) { |
| read_disk_info.offset=0; | File_measure_action_info& info=*static_cast<File_measure_action_info *>(context); |
| info=&read_disk_info;read_func=read_disk; | |
| Measure_file_reader reader(f, *info.file_name, fname); | |
| measure(*info.file_name, reader, *info.width, *info.height, info.exif); | |
| } | |
| 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={0}; | |
| info.width=&width; | |
| info.height=&height; | |
| info.exif=&exif; | |
| info.file_name=file_name; | |
| file_read_action_under_lock(r.absolute(*file_name), | |
| "measure", file_measure_action, &info); | |
| } else { | } else { |
| const VFile& vfile=*data.as_vfile(); | VFile* vfile=data.as_vfile(); |
| file_name=&static_cast<Value *>(vfile.fields().get(*name_name))->as_string(); | file_name=&vfile->fields().get(name_name)->as_string(); |
| read_mem_info.ptr=(unsigned char *)vfile.value_ptr(); | Measure_buf_reader reader( |
| read_mem_info.eof=read_mem_info.ptr+vfile.value_size(); | vfile->value_ptr(), |
| info=&read_mem_info;read_func=read_mem; | vfile->value_size(), |
| *file_name | |
| ); | |
| measure(*file_name, reader, width, height, &exif); | |
| } | } |
| Measure_reader reader(read_func, info); | GET_SELF(r, VImage).set(file_name, width, height, 0, exif); |
| int width, height; | |
| measure(pool, *file_name, reader, width, height); | |
| static_cast<VImage *>(r.self)->set(file_name, width, height); | |
| } | } |
| /// used by image: _html / append_attrib_pair | #ifndef DOXYGEN |
| struct Attrib_info { | struct Attrib_info { |
| String *tag; ///< html tag being constructed | String* tag; ///< html tag being constructed |
| Hash *skip; ///< tag attributes not to append to tag string [to skip] | HashStringValue* 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) { | #endif |
| Attrib_info& ai=*static_cast<Attrib_info *>(info); | static void append_attrib_pair( |
| HashStringValue::key_type key, | |
| if(ai.skip && ai.skip->get(key)) | HashStringValue::value_type value, |
| Attrib_info* info) { | |
| // skip user-specified and internal(starting with "line-") attributes | |
| if(info->skip && info->skip->get(key) || key.pos("line-")==0) | |
| return; | return; |
| Value& value=*static_cast<Value *>(val); | |
| // src="a.gif" width=123 ismap[=-1] | // src="a.gif" width=123 ismap[=-1] |
| *ai.tag << " " << key; | *info->tag << " " << key; |
| if(value.is_string() || value.as_int()>=0) | if(value->is_string() || value->as_int()>=0) |
| *ai.tag << "=\"" << value.as_string() << "\""; | *info->tag << "=\"" << value->as_string() << "\""; |
| } | } |
| static void _html(Request& r, const String& method_name, MethodParams *params) { | static void _html(Request& r, MethodParams& params) { |
| Pool& pool=r.pool(); | |
| String tag(pool); | String tag; |
| tag << "<img"; | tag << "<img"; |
| const Hash& fields=static_cast<VImage *>(r.self)->fields(); | const HashStringValue& fields=GET_SELF(r, VImage).fields(); |
| Hash *attribs=0; | HashStringValue* attribs=0; |
| if(params->size()) | if(params.count()) { |
| if(attribs=params->get(0).get_hash()) { | // for backward compatibility: someday was ^html{} |
| Attrib_info attrib_info={&tag, 0}; | Value& vattribs=r.process_to_value(params[0], |
| attribs->for_each(append_attrib_pair, &attrib_info); | /*0/*no name* /,*/ |
| } else | false/*don't intercept string*/); |
| PTHROW(0, 0, | if(!vattribs.is_string()) // allow empty |
| &method_name, | if(attribs=vattribs.get_hash()) { |
| "attributes must be must be hash"); | Attrib_info info={&tag}; |
| attribs->for_each(append_attrib_pair, &info); | |
| } else | |
| throw Exception("parser.runtime", | |
| 0, | |
| "attributes must be hash"); | |
| } | |
| Attrib_info attrib_info={&tag, attribs}; | { |
| fields.for_each(append_attrib_pair, &attrib_info); | Attrib_info info={&tag, attribs}; |
| fields.for_each(append_attrib_pair, &info); | |
| } | |
| tag << " />"; | tag << " />"; |
| r.write_pass_lang(tag); | r.write_pass_lang(tag); |
| } | } |
| static gdImage *load(Request& r, const String& method_name, | /// @test wrap FILE to auto-object |
| static gdImage* load(Request& r, | |
| const String& file_name){ | const String& file_name){ |
| Pool& pool=r.pool(); | const char* file_name_cstr=r.absolute(file_name).cstr(String::L_FILE_SPEC); |
| const char *file_name_cstr=r.absolute(file_name).cstr(String::UL_FILE_NAME); | |
| if(FILE *f=fopen(file_name_cstr, "rb")) { | if(FILE *f=fopen(file_name_cstr, "rb")) { |
| gdImage& image=*new(pool) gdImage(pool); | gdImage* image=new gdImage; |
| bool ok=image.CreateFromGif(f); | bool ok=image->CreateFromGif(f); |
| fclose(f); | fclose(f); |
| if(!ok) | if(!ok) |
| PTHROW(0, 0, | throw Exception("image.format", |
| &file_name, | &file_name, |
| "is not in GIF format"); | "is not in GIF format"); |
| return ℑ | return image; |
| } else { | } else { |
| PTHROW(0, 0, | throw Exception("file.missing", |
| &method_name, | 0, |
| "can not open '%s'", file_name_cstr); | "can not open '%s'", file_name_cstr); |
| return 0; | |
| } | } |
| } | } |
| static void _load(Request& r, const String& method_name, MethodParams *params) { | static void _load(Request& r, MethodParams& params) { |
| Pool& pool=r.pool(); | const String& file_name=params.as_string(0, "file name must not be code"); |
| Value& vfile_name=params->get_no_junction(0, "file name must not be code"); | gdImage* image=load(r, file_name); |
| const String& file_name=vfile_name.as_string(); | GET_SELF(r, VImage).set(&file_name, image->SX(), image->SY(), image); |
| gdImage& image=*load(r, method_name, file_name); | |
| int width=image.SX(); | |
| int height=image.SY(); | |
| static_cast<VImage *>(r.self)->set(&file_name, width, height, &image); | |
| } | } |
| static void _create(Request& r, const String& method_name, MethodParams *params) { | static void _create(Request& r, MethodParams& params) { |
| Pool& pool=r.pool(); | int width=params.as_int(0, "width must be int", r); |
| int height=params.as_int(1, "height must be int", r); | |
| int width=r.process(params->get(0)).as_int(); | |
| int height=r.process(params->get(1)).as_int(); | |
| int bgcolor_value=0xffFFff; | int bgcolor_value=0xffFFff; |
| if(params->size()>2) | if(params.count()>2) |
| bgcolor_value=r.process(params->get(2)).as_int(); | bgcolor_value=params.as_int(2, "color must be int", r); |
| gdImage& image=*new(pool) gdImage(pool); | gdImage* image=new gdImage; |
| image.Create(width, height); | image->Create(width, height); |
| image.FilledRectangle(0, 0, width-1, height-1, image.Color(bgcolor_value)); | image->FilledRectangle(0, 0, width-1, height-1, image->Color(bgcolor_value)); |
| static_cast<VImage *>(r.self)->set(0, width, height, &image); | GET_SELF(r, VImage).set(0, width, height, image); |
| } | } |
| static void _gif(Request& r, const String& method_name, MethodParams *params) { | static void _gif(Request& r, MethodParams& params) { |
| Pool& pool=r.pool(); | gdImage* image=GET_SELF(r, VImage).image; |
| gdImage *image=static_cast<VImage *>(r.self)->image; | |
| if(!image) | if(!image) |
| PTHROW(0, 0, | throw Exception(0, |
| &method_name, | 0, |
| "does not contain an image"); | "does not contain an image"); |
| // could _ but don't thing it's wise to use $image.src for vfile.name | const String *file_name=0; |
| if(params.count()>0) | |
| file_name=¶ms.as_string(0, "file name must be string"); | |
| String out(pool); image->Gif(out); | gdBuf buf=image->Gif(); |
| VFile& vfile=*new(pool) VFile(pool); | VFile& vfile=*new VFile; |
| String& image_gif=*new(pool) String(pool, "image/gif"); | Value* content_type=new VString(*new String("image/gif")); |
| vfile.set(false/*not tainted*/, | vfile.set(false/*not tainted*/, |
| out.cstr(String::UL_AS_IS), out.size(), 0, &image_gif); | (const char*)buf.ptr, buf.size, |
| file_name? file_name->cstr(String::L_FILE_SPEC): 0, | |
| content_type); | |
| r.write_no_lang(vfile); | r.write_no_lang(vfile); |
| } | } |
| static void _line(Request& r, const String& method_name, MethodParams *params) { | static void _line(Request& r, MethodParams& params) { |
| Pool& pool=r.pool(); | gdImage* image=GET_SELF(r, VImage).image; |
| gdImage *image=static_cast<VImage *>(r.self)->image; | |
| if(!image) | if(!image) |
| PTHROW(0, 0, | throw Exception(0, |
| &method_name, | 0, |
| "does not contain an image"); | "does not contain an image"); |
| image->Line( | image->Line( |
| r.process(params->get(0)).as_int(), | params.as_int(0, "x0 must be int", r), |
| r.process(params->get(1)).as_int(), | params.as_int(1, "y0 must be int", r), |
| r.process(params->get(2)).as_int(), | params.as_int(2, "x1 must be int", r), |
| r.process(params->get(3)).as_int(), | params.as_int(3, "y1 must be int", r), |
| image->Color(r.process(params->get(4)).as_int())); | image->Color(params.as_int(4, "color must be int", r))); |
| } | } |
| static void _fill(Request& r, const String& method_name, MethodParams *params) { | static void _fill(Request& r, MethodParams& params) { |
| Pool& pool=r.pool(); | gdImage* image=GET_SELF(r, VImage).image; |
| gdImage *image=static_cast<VImage *>(r.self)->image; | |
| if(!image) | if(!image) |
| PTHROW(0, 0, | throw Exception(0, |
| &method_name, | 0, |
| "does not contain an image"); | "does not contain an image"); |
| image->Fill( | image->Fill( |
| r.process(params->get(0)).as_int(), | params.as_int(0, "x must be int", r), |
| r.process(params->get(1)).as_int(), | params.as_int(1, "y must be int", r), |
| image->Color(r.process(params->get(2)).as_int())); | image->Color(params.as_int(2, "color must be int", r))); |
| } | } |
| static void _rectangle(Request& r, const String& method_name, MethodParams *params) { | static void _rectangle(Request& r, MethodParams& params) { |
| Pool& pool=r.pool(); | gdImage* image=GET_SELF(r, VImage).image; |
| gdImage *image=static_cast<VImage *>(r.self)->image; | |
| if(!image) | if(!image) |
| PTHROW(0, 0, | throw Exception(0, |
| &method_name, | 0, |
| "does not contain an image"); | "does not contain an image"); |
| image->Rectangle( | image->Rectangle( |
| r.process(params->get(0)).as_int(), | params.as_int(0, "x0 must be int", r), |
| r.process(params->get(1)).as_int(), | params.as_int(1, "y0 must be int", r), |
| r.process(params->get(2)).as_int(), | params.as_int(2, "x1 must be int", r), |
| r.process(params->get(3)).as_int(), | params.as_int(3, "y1 must be int", r), |
| image->Color(r.process(params->get(4)).as_int())); | image->Color(params.as_int(4, "color must be int", r))); |
| } | } |
| static void _bar(Request& r, const String& method_name, MethodParams *params) { | static void _bar(Request& r, MethodParams& params) { |
| Pool& pool=r.pool(); | gdImage* image=GET_SELF(r, VImage).image; |
| gdImage *image=static_cast<VImage *>(r.self)->image; | |
| if(!image) | if(!image) |
| PTHROW(0, 0, | throw Exception(0, |
| &method_name, | 0, |
| "does not contain an image"); | "does not contain an image"); |
| image->FilledRectangle( | image->FilledRectangle( |
| r.process(params->get(0)).as_int(), | params.as_int(0, "x0 must be int", r), |
| r.process(params->get(1)).as_int(), | params.as_int(1, "y0 must be int", r), |
| r.process(params->get(2)).as_int(), | params.as_int(2, "x1 must be int", r), |
| r.process(params->get(3)).as_int(), | params.as_int(3, "y1 must be int", r), |
| image->Color(r.process(params->get(4)).as_int())); | image->Color(params.as_int(4, "color must be int", r))); |
| } | } |
| #ifndef DOXYGEN | |
| static void add_point(Table::element_type row, | |
| gdImage::Point **p) { | |
| (**p).x=row->get(0)->as_int(); | |
| (**p).y=row->get(1)->as_int(); | |
| (*p)++; | |
| } | |
| #endif | |
| static void _replace(Request& r, MethodParams& params) { | |
| gdImage* image=GET_SELF(r, VImage).image; | |
| if(!image) | |
| throw Exception(0, | |
| 0, | |
| "does not contain an image"); | |
| static void _replace(Request& r, const String& method_name, MethodParams *params) { | Table* table=params.as_no_junction(2, "coordinates must not be code").get_table(); |
| Pool& pool=r.pool(); | if(!table) |
| throw Exception(0, | |
| 0, | |
| "coordinates must be table"); | |
| gdImage::Point *all_p=new(PointerFreeGC) gdImage::Point[table->count()]; | |
| gdImage::Point *add_p=all_p; | |
| table->for_each(add_point, &add_p); | |
| image->FilledPolygonReplaceColor(all_p, table->count(), | |
| image->Color(params.as_int(0, "src color must be int", r)), | |
| image->Color(params.as_int(1, "dest color must be int", r))); | |
| } | |
| gdImage *image=static_cast<VImage *>(r.self)->image; | static void _polyline(Request& r, MethodParams& params) { |
| gdImage* image=GET_SELF(r, VImage).image; | |
| if(!image) | if(!image) |
| PTHROW(0, 0, | throw Exception(0, |
| &method_name, | 0, |
| "does not contain an image"); | "does not contain an image"); |
| if((params->size()-2)%2) // I see your thoughts, but that's more readable | Table* table=params.as_no_junction(1, "coordinates must not be code").get_table(); |
| PTHROW(0, 0, | if(!table) |
| &method_name, | throw Exception(0, |
| "y coordinate missing"); | 0, |
| "coordinates must be table"); | |
| int n=(params->size()-2)/2; | |
| gdImage::Point* all_p=new(PointerFreeGC) gdImage::Point[table->count()]; | |
| gdImage::Point *p=(gdImage::Point *)pool.malloc(sizeof(gdImage::Point)*n); | gdImage::Point *add_p=all_p; |
| for(int i=0; i<n; i++) { | table->for_each(add_point, &add_p); |
| p[i].x=r.process(params->get(2+i*2+0)).as_int(); | image->Polygon(all_p, table->count(), |
| p[i].y=r.process(params->get(2+i*2+1)).as_int(); | image->Color(params.as_int(0, "color must be int", r)), |
| } | false/*not closed*/); |
| 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) { | static void _polygon(Request& r, MethodParams& params) { |
| Pool& pool=r.pool(); | gdImage* image=GET_SELF(r, VImage).image; |
| gdImage *image=static_cast<VImage *>(r.self)->image; | |
| if(!image) | if(!image) |
| PTHROW(0, 0, | throw Exception(0, |
| &method_name, | 0, |
| "does not contain an image"); | "does not contain an image"); |
| if((params->size()-1)%2) // [I see..] see now? | Table* table=params.as_no_junction(1, "coordinates must not be code").get_table(); |
| PTHROW(0, 0, | if(!table) |
| &method_name, | throw Exception(0, |
| "y coordinate missing"); | 0, |
| "coordinates must be table"); | |
| int n=(params->size()-1)/2; | |
| gdImage::Point* all_p=new(PointerFreeGC) gdImage::Point[table->count()]; | |
| gdImage::Point *p=(gdImage::Point *)pool.malloc(sizeof(gdImage::Point)*n); | gdImage::Point *add_p=all_p; |
| for(int i=0; i<n; i++) { | table->for_each(add_point, &add_p); |
| p[i].x=r.process(params->get(1+i*2+0)).as_int(); | image->Polygon(all_p, table->count(), |
| p[i].y=r.process(params->get(1+i*2+1)).as_int(); | image->Color(params.as_int(0, "color must be int", r))); |
| } | |
| image->Polygon(p, n, | |
| image->Color(r.process(params->get(0)).as_int())); | |
| } | } |
| static void _polybar(Request& r, const String& method_name, MethodParams *params) { | static void _polybar(Request& r, MethodParams& params) { |
| Pool& pool=r.pool(); | gdImage* image=GET_SELF(r, VImage).image; |
| gdImage *image=static_cast<VImage *>(r.self)->image; | |
| if(!image) | if(!image) |
| PTHROW(0, 0, | throw Exception(0, |
| &method_name, | 0, |
| "does not contain an image"); | "does not contain an image"); |
| if((params->size()-1)%2) // [I see..] see now? | Table* table=params.as_no_junction(1, "coordinates must not be code").get_table(); |
| PTHROW(0, 0, | if(!table) |
| &method_name, | throw Exception("parser.runtime", |
| "y coordinate missing"); | 0, |
| "coordinates must be table"); | |
| int n=(params->size()-1)/2; | |
| gdImage::Point* all_p=new(PointerFreeGC) gdImage::Point[table->count()]; | |
| gdImage::Point *p=(gdImage::Point *)pool.malloc(sizeof(gdImage::Point)*n); | gdImage::Point *add_p=all_p; |
| for(int i=0; i<n; i++) { | table->for_each(add_point, &add_p); |
| p[i].x=r.process(params->get(1+i*2+0)).as_int(); | image->FilledPolygon(all_p, table->count(), |
| p[i].y=r.process(params->get(1+i*2+1)).as_int(); | image->Color(params.as_int(0, "color must be int", r))); |
| } | |
| image->FilledPolygon(p, n, | |
| image->Color(r.process(params->get(0)).as_int())); | |
| } | } |
| // font | // font |
| #define Y(y)(y+index*height+1) | #define Y(y)(y+index*height) |
| /// simple gdImage-based font storage & text output | // Font class |
| class Font : public Pooled { | |
| public: | const int Font::letter_spacing=1; |
| int height; //< Font heigth | Font::Font(//, |
| int space; //< Default char width | const String& aalphabet, |
| gdImage& ifont; | gdImage* aifont, int aheight, int amonospace, int aspacebarspace): |
| const String& alphabet; | alphabet(aalphabet), |
| height(aheight), monospace(amonospace), spacebarspace(aspacebarspace), | |
| Font(Pool& pool, | ifont(aifont) { |
| const String& aalphabet, | } |
| gdImage& aifont, int aheight, int aspace) : Pooled(pool), | |
| alphabet(aalphabet), | /* ******************************** char ********************************** */ |
| height(aheight), space(aspace), | |
| ifont(aifont) { | size_t Font::index_of(char ch) { |
| } | if(ch==' ') return STRING_NOT_FOUND; |
| return alphabet.pos(ch); | |
| /* ******************************** char ********************************** */ | } |
| int index_of(char ch) { | int Font::index_width(size_t index) { |
| if(ch==' ') return -1; | if(index==STRING_NOT_FOUND) |
| return alphabet.pos(&ch, 1); | return spacebarspace; |
| } | int tr=ifont->GetTransparent(); |
| for(int x=ifont->SX()-1; x>=0; x--) { | |
| int index_width(int index) { | for(int y=0; y<height; y++) |
| if(index<0) | if(ifont->GetPixel(x, Y(y))!=tr) |
| index=index_of('.'); | return x+1; |
| if(index<0) | |
| return 0; | |
| int tr=ifont.GetTransparent(); | |
| for(int x=ifont.SX()-1; x>0; x--) { | |
| for(int y=0; y<height-1; y++) | |
| if(ifont.GetPixel(x, Y(y))!=tr) | |
| return x+2; | |
| } | |
| return 0; | |
| } | |
| void index_display(gdImage& image, int x, int y, int index){ | |
| if(index>=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+=space ? space : index_width(index); | |
| } | |
| } | } |
| return 0; | |
| }; | } |
| static void _font(Request& r, const String& method_name, MethodParams *params) { | |
| Pool& pool=r.pool(); | 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); | |
| } | |
| Value& valphabet=params->get_no_junction(0, "alphabet must not be code"); | /* ******************************** string ********************************** */ |
| Value& file_name=params->get_no_junction(1, "file_name must not be code"); | |
| int height=r.process(params->get(2)).as_int(); | |
| int width=params->size()>3?r.process(params->get(3)).as_int():0; | int Font::step_width(int index) { |
| return letter_spacing + (monospace ? monospace : index_width(index)); | |
| } | |
| // 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; | |
| for(const char* current=cstr; *current; current++) | |
| result+=step_width(index_of(*current)); | |
| return result; | |
| } | |
| static_cast<VImage *>(r.self)->font=new(pool) Font(pool, | void Font::string_display(gdImage* image, int x, int y, const String& s){ |
| valphabet.as_string(), | const char* cstr=s.cstr(); |
| *load(r, method_name, file_name.as_string()), | for(const char* current=cstr; *current; current++) { |
| height, width); | size_t index=index_of(*current); |
| index_display(image, x, y, index); | |
| x+=step_width(index); | |
| } | |
| } | } |
| static void _text(Request& r, const String& method_name, MethodParams *params) { | // |
| Pool& pool=r.pool(); | |
| static void _font(Request& r, MethodParams& params) { | |
| const String& alphabet=params.as_string(0, "alphabet must not be code"); | |
| gdImage* image=load(r, params.as_string(1, "file_name must not be code")); | |
| int spacebar_width=params.as_int(2, "spacebar_width must be int", r); | |
| int monospace_width; | |
| if(params.count()>3) { | |
| monospace_width=params.as_int(3, "monospace_width must be int", r); | |
| if(!monospace_width) | |
| monospace_width=image->SX(); | |
| } else | |
| monospace_width=0; | |
| if(!alphabet.length()) | |
| throw Exception("parser.runtime", | |
| 0, | |
| "alphabet must not be empty"); | |
| 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).font=new Font( | |
| alphabet, | |
| image, | |
| image->SY() / alphabet.length(), monospace_width, spacebar_width); | |
| } | |
| int x=r.process(params->get(0)).as_int(); | static void _text(Request& r, MethodParams& params) { |
| int y=r.process(params->get(1)).as_int(); | int x=params.as_int(0, "x must be int", r); |
| const String& s=r.process(params->get(2)).as_string(); | 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=*static_cast<VImage *>(r.self); | VImage& vimage=GET_SELF(r, VImage); |
| if(vimage.image) | if(vimage.image) |
| if(vimage.font) | if(vimage.font) |
| vimage.font->string_display(*vimage.image, x, y, s); | vimage.font->string_display(vimage.image, x, y, s); |
| else | else |
| PTHROW(0, 0, | throw Exception("parser.runtime", |
| &method_name, | 0, |
| "set the font first"); | "set the font first"); |
| else | else |
| PTHROW(0, 0, | throw Exception(0, |
| &method_name, | 0, |
| "does not contain an image"); | "does not contain an image"); |
| } | } |
| // constructor | 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); | |
| if(vimage.image) | |
| if(vimage.font) { | |
| r.write_no_lang(*new VInt(vimage.font->string_width(s))); | |
| } else | |
| throw Exception("parser.runtime", | |
| 0, | |
| "set the font first"); | |
| else | |
| throw Exception(0, | |
| 0, | |
| "does not contain an image"); | |
| } | |
| static void _arc(Request& r, MethodParams& params) { | |
| gdImage* image=GET_SELF(r, VImage).image; | |
| if(!image) | |
| throw Exception(0, | |
| 0, | |
| "does not contain an 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; | |
| if(!image) | |
| throw Exception(0, | |
| 0, | |
| "does not contain an image"); | |
| 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))); | |
| } | |
| static void _circle(Request& r, MethodParams& params) { | |
| gdImage* image=GET_SELF(r, VImage).image; | |
| if(!image) | |
| throw Exception(0, | |
| 0, | |
| "does not contain an 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) { | |
| gdImage* src=0; | |
| Value& value=params.as_no_junction(index, msg); | |
| if(Value* vimage=value.as(VIMAGE_TYPE, false)) { | |
| src=static_cast<VImage *>(vimage)->image; | |
| if(!src) | |
| throw Exception("parser.runtime", | |
| 0, | |
| msg); | |
| } else | |
| throw Exception("parser.runtime", | |
| 0, | |
| msg); | |
| return src; | |
| } | |
| static void _copy(Request& r, MethodParams& params) { | |
| gdImage* dest=GET_SELF(r, VImage).image; | |
| if(!dest) | |
| throw Exception(0, | |
| 0, | |
| "self does not contain an 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); | |
| } | |
| MImage::MImage(Pool& apool) : Methoded(apool) { | |
| set_name(*NEW String(pool(), IMAGE_CLASS_NAME)); | |
| // constructor | |
| MImage::MImage(): Methoded("image") { | |
| // ^image:measure[DATA] | // ^image:measure[DATA] |
| add_native_method("measure", Method::CT_DYNAMIC, _measure, 1, 1); | add_native_method("measure", Method::CT_DYNAMIC, _measure, 1, 1); |
| Line 661 MImage::MImage(Pool& apool) : Methoded(a | Line 1235 MImage::MImage(Pool& apool) : Methoded(a |
| add_native_method("create", Method::CT_DYNAMIC, _create, 2, 3); | add_native_method("create", Method::CT_DYNAMIC, _create, 2, 3); |
| // ^image.gif[] | // ^image.gif[] |
| add_native_method("gif", Method::CT_DYNAMIC, _gif, 0, 0); | add_native_method("gif", Method::CT_DYNAMIC, _gif, 0, 1); |
| // ^image.line(x0;y0;x1;y1;color) | // ^image.line(x0;y0;x1;y1;color) |
| add_native_method("line", Method::CT_DYNAMIC, _line, 5, 5); | add_native_method("line", Method::CT_DYNAMIC, _line, 5, 5); |
| Line 675 MImage::MImage(Pool& apool) : Methoded(a | Line 1249 MImage::MImage(Pool& apool) : Methoded(a |
| // ^image.bar(x0;y0;x1;y1;color) | // ^image.bar(x0;y0;x1;y1;color) |
| add_native_method("bar", Method::CT_DYNAMIC, _bar, 5, 5); | add_native_method("bar", Method::CT_DYNAMIC, _bar, 5, 5); |
| // ^image.replace(color-source;color-dest)(x;y)... point coord pairs | // ^image.replace(color-source;color-dest)[table x:y] |
| add_native_method("replace", Method::CT_DYNAMIC, _replace, 2+3*2, 2+100*2); | add_native_method("replace", Method::CT_DYNAMIC, _replace, 3, 3); |
| // ^image.polyline(color)[table x:y] | |
| add_native_method("polyline", Method::CT_DYNAMIC, _polyline, 2, 2); | |
| // ^image.polygon(color)(x;y)... point coord pairs | // ^image.polygon(color)[table x:y] |
| add_native_method("polygon", Method::CT_DYNAMIC, _polygon, 1+3*2, 1+100*2); | add_native_method("polygon", Method::CT_DYNAMIC, _polygon, 2, 2); |
| // ^image.polybar(color)(x;y)... point coord pairs | // ^image.polybar(color)[table x:y] |
| add_native_method("polybar", Method::CT_DYNAMIC, _polybar, 1+3*2, 1+100*2); | add_native_method("polybar", Method::CT_DYNAMIC, _polybar, 2, 2); |
| // ^image.font[alPHAbet;font-file-name.gif](height) | // ^image.font[alPHAbet;font-file-name.gif](spacebar_width) |
| // ^image.font[alPHAbet;font-file-name.gif](height;width) | // ^image.font[alPHAbet;font-file-name.gif](spacebar_width;width) |
| add_native_method("font", Method::CT_DYNAMIC, _font, 3, 4); | add_native_method("font", Method::CT_DYNAMIC, _font, 3, 4); |
| // ^image.text(x;y)[text] | // ^image.text(x;y)[text] |
| add_native_method("text", Method::CT_DYNAMIC, _text, 3, 3); | add_native_method("text", Method::CT_DYNAMIC, _text, 3, 3); |
| } | // ^image.ngth[text] |
| add_native_method("length", Method::CT_DYNAMIC, _length, 1, 1); | |
| // global variable | |
| // ^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); | |
| Methoded *image_class; | // ^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); | |
| // creator | // ^image.circle(center x;center y;r;color) |
| add_native_method("circle", Method::CT_DYNAMIC, _circle, 4, 4); | |
| Methoded *MImage_create(Pool& pool) { | // ^image.copy[source](src x;src y;src w;src h;dst x;dst y[;dest w[;dest h[;tolerance]]]) |
| return image_class=new(pool) MImage(pool); | add_native_method("copy", Method::CT_DYNAMIC, _copy, 1+2+2+2, (1+2+2+2)+2+1); |
| } | } |