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| version 1.72, 2002/05/16 16:18:19 | version 1.90, 2003/01/21 15:51:06 |
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| Line 1 | Line 1 |
| /** @file | /** @file |
| Parser: @b image parser class. | Parser: @b image parser class. |
| Copyright(c) 2001, 2002 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: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) |
| $Id$ | |
| */ | */ |
| static const char* IDENT_IMAGE_C="$Date$"; | |
| /* | /* |
| jpegsize: gets the width and height (in pixels) of a jpeg file | jpegsize: gets the width and height (in pixels) of a jpeg file |
| Andrew Tong, werdna@ugcs.caltech.edu February 14, 1995 | Andrew Tong, werdna@ugcs.caltech.edu February 14, 1995 |
| Line 24 | Line 24 |
| #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" | |
| // class | // class |
| Line 44 public: // Methoded | Line 45 public: // Methoded |
| #ifndef DOXYGEN | #ifndef DOXYGEN |
| class Measure_reader { | class Measure_reader { |
| public: | public: |
| enum { READ_CHUNK_SIZE=0x400*20 };// 20K | virtual size_t read(const void *&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; | |
| }; | |
| Measure_reader(Func afunc, void *ainfo) : | class Measure_file_reader: public Measure_reader { |
| func(afunc), info(ainfo), | public: |
| chunk(0), offset(0), size(0) { | Measure_file_reader(Pool& apool, int af, const String& afile_name, const char *afname): |
| pool(apool), file_name(afile_name), fname(afname), f(af) { | |
| } | } |
| size_t read(void *&buf, size_t limit) { | /*override*/size_t read(const void *&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 | void *lbuf=pool.malloc(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; |
| } | } |
| /*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), actual filename '%s'", | |
| value, whence, strerror(errno), errno, fname); | |
| } | |
| /*override*/long tell() { return lseek(f, 0, SEEK_CUR); } | |
| private: | |
| Pool& pool; | |
| const String& file_name; const char *fname; | |
| int f; | |
| }; | |
| class Measure_buf_reader: public Measure_reader { | |
| public: | |
| Measure_buf_reader(const void *abuf, size_t asize, const String& afile_name): | |
| buf(abuf), size(asize), file_name(afile_name), offset(0) { | |
| } | |
| /*override*/size_t read(const void *&abuf, size_t limit) { | |
| size_t to_read=min(limit, size-offset); | |
| abuf=(const char*)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; } | |
| private: | private: |
| Func func; | |
| void *info; | |
| void *chunk; | const void *buf; size_t size; |
| const String& file_name; | |
| size_t offset; | size_t offset; |
| size_t size; | |
| }; | }; |
| #endif | #endif |
| /// PNG file header | /// PNG file header |
| struct PNG_Header { | struct PNG_Header { |
| char dummy[12]; | char dummy[12]; |
| char signature[4]; //< must be "IHDR" | char signature[4]; //< must be "IHDR" |
| unsigned char high_width[2]; //< image width high bytes [we ignore for now] | uchar high_width[2]; //< image width high bytes [we ignore for now] |
| unsigned char width[2]; //< image width low bytes | uchar width[2]; //< image width low bytes |
| unsigned char high_height[2]; //< image height high bytes [we ignore for now] | uchar high_height[2]; //< image height high bytes [we ignore for now] |
| unsigned char height[4]; //< image height | uchar height[4]; //< image height |
| }; | }; |
| /// GIF file header | /// GIF file header |
| struct GIF_Header { | struct GIF_Header { |
| char signature[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; |
| Line 102 struct GIF_Header { | Line 151 struct GIF_Header { |
| /// JPEG record head | /// JPEG record head |
| struct JPG_Segment_head { | struct JPG_Segment_head { |
| unsigned char marker; | uchar marker; |
| unsigned char code; | uchar code; |
| unsigned char length[2]; | uchar length[2]; |
| }; | }; |
| /// JPEG frame header | /// JPEG frame header |
| struct JPG_Size_segment_body { | struct JPG_Size_segment_body { |
| char data; //< data precision of bits/sample | char data; //< data precision of bits/sample |
| unsigned char height[2]; //< image height | uchar height[2]; //< image height |
| unsigned 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_start { | |
| 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_start { | |
| 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 x_endian_to_int(unsigned char L, unsigned char H) { | inline ushort x_endian_to_ushort(uchar b0, uchar b1) { |
| return(short)((H<<8) + L); | return (ushort)((b1<<8) + b0); |
| } | } |
| inline short big_endian_to_int(unsigned char b[2]) { | inline uint x_endian_to_uint(uchar b0, uchar b1, uchar b2, uchar b3) { |
| return x_endian_to_int(b[1], b[0]); | return (uint)(((((b3<<8) + b2)<<8)+b1)<<8)+b0; |
| } | } |
| inline short little_endian_to_int(unsigned char b[2]) { | inline ushort endian_to_ushort(bool is_big, const uchar *b/* [2] */) { |
| return x_endian_to_int(b[0], b[1]); | return is_big?x_endian_to_ushort(b[1], b[0]): |
| x_endian_to_ushort(b[0], b[1]); | |
| } | } |
| void measure_gif(Pool& pool, const String *origin_string, | inline uint endian_to_uint(bool is_big, const uchar *b /* [4] */) { |
| Measure_reader& reader, int& width, int& height) { | 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]); | |
| } | |
| static void measure_gif(Pool& pool, const String *origin_string, | |
| Measure_reader& reader, ushort& width, ushort& height) { | |
| void *buf; | const void *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) |
| throw Exception("image.format", | throw Exception("image.format", |
| Line 144 void measure_gif(Pool& pool, const Strin | Line 228 void measure_gif(Pool& pool, const Strin |
| origin_string, | origin_string, |
| "not GIF file - wrong signature"); | "not GIF file - wrong signature"); |
| width=little_endian_to_int(head->width); | width=endian_to_ushort(false, head->width); |
| height=little_endian_to_int(head->height); | height=endian_to_ushort(false, head->height); |
| } | |
| static Value *parse_IFD_entry_formatted_one_value(Pool& pool, | |
| bool is_big, | |
| ushort format, | |
| size_t component_size, | |
| const uchar *value) { | |
| switch(format) { | |
| case 1: // unsigned byte | |
| return new(pool) VInt(pool, (uchar)value[0]); | |
| case 3: // unsigned short | |
| return new(pool) VInt(pool, endian_to_ushort(is_big, value)); | |
| case 4: // unsigned long | |
| // 'double' because parser's Int is signed | |
| return new(pool) VDouble(pool, 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(pool) VDouble(pool, ((double)numerator)/denominator); | |
| } | |
| case 6: // signed byte | |
| return new(pool) VInt(pool, (signed char)value[0]); | |
| case 8: // signed short | |
| return new(pool) VInt(pool, (signed short)endian_to_ushort(is_big, value)); | |
| case 9: // signed long | |
| return new(pool) VInt(pool, (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(pool) VDouble(pool, numerator/denominator); | |
| } | |
| /* | |
| case 11: // single float | |
| todo | |
| case 12: // double float | |
| todo | |
| */ | |
| }; | |
| return 0; | |
| } | } |
| /// @test remove ugly mech in reader - 20K limit | // date.C |
| void measure_jpeg(Pool& pool, const String *origin_string, | time_t cstr_to_time_t(char *cstr, const String *report_error_origin); |
| Measure_reader& reader, int& width, int& height) { | |
| static Value *parse_IFD_entry_formatted_value(Pool& pool, | |
| 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 size=components_count; | |
| // Data format is "YYYY:MM:DD HH:MM:SS"+0x00, total 20bytes | |
| if(size==JPEG_EXIF_DATE_CHARS | |
| && isdigit(cstr[0]) | |
| && cstr[JPEG_EXIF_DATE_CHARS-1]==0) { | |
| char cstr_writable[JPEG_EXIF_DATE_CHARS]; | |
| strcpy(cstr_writable, cstr); | |
| time_t t=cstr_to_time_t(cstr_writable, 0/* do not throw exception, just return bad result */); | |
| if(t>=0) | |
| return new(pool) VDate(pool, t); | |
| } | |
| if(const char *premature_zero_pos=(const char *)memchr(cstr, 0, size)) | |
| size=premature_zero_pos-cstr; | |
| return new(pool) VString(*new(pool) String(pool, cstr, size, true/*tainted*/)); | |
| } | |
| if(components_count==1) | |
| return parse_IFD_entry_formatted_one_value(pool, is_big, format, component_size, value); | |
| VHash& result=*new(pool) VHash(pool); | |
| Hash& hash=result.hash(0); | |
| for(uint i=0; i<components_count; i++, value+=component_size) { | |
| String& skey=*new(pool) String(pool); | |
| { | |
| char *buf=(char *)pool.malloc(MAX_NUMBER); | |
| snprintf(buf, MAX_NUMBER, "%d", i); | |
| skey << buf; | |
| } | |
| hash.put(skey, parse_IFD_entry_formatted_one_value(pool, is_big, format, component_size, value)); | |
| } | |
| return &result; | |
| } | |
| static Value *parse_IFD_entry_value(Pool& pool, | |
| bool is_big, Measure_reader& reader, long tiff_base, | |
| JPG_Exif_IFD_entry& entry) { | |
| size_t format2component_size[]={ | |
| 0, // undefined | |
| 1, // unsigned byte | |
| 1, // ascii string | |
| 2, // unsigned short | |
| 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(pool, | |
| 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 void *value; | |
| if(reader.read(value, value_size)<sizeof(value_size)) | |
| return 0; | |
| result=parse_IFD_entry_formatted_value(pool, | |
| is_big, format, | |
| component_size, components_count, | |
| (const uchar*)value); | |
| } | |
| reader.seek(remembered, SEEK_SET); | |
| } | |
| return result; | |
| } | |
| static void parse_IFD(Pool& pool, | |
| Hash& hash, | |
| bool is_big, Measure_reader& reader, long tiff_base); | |
| static void parse_IFD_entry(Pool& pool, Hash& 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(pool, hash, is_big, reader, tiff_base); | |
| } | |
| reader.seek(remembered, SEEK_SET); | |
| return; | |
| } | |
| if(Value *value=parse_IFD_entry_value(pool, is_big, reader, tiff_base, entry)) { | |
| String& skey=*new(pool) String(pool); | |
| { | |
| char *buf=(char *)pool.malloc(MAX_NUMBER); | |
| snprintf(buf, MAX_NUMBER, "%u", tag); | |
| skey << buf; | |
| } | |
| if(const char *name=(const char *)exif_tag_value2name->get(skey)) | |
| hash.put(*new(pool) String(pool, name), value); | |
| else | |
| hash.put(skey, value); | |
| } | |
| } | |
| static void parse_IFD(Pool& pool, | |
| Hash& hash, | |
| bool is_big, Measure_reader& reader, long tiff_base) { | |
| const void *buf; | |
| if(reader.read(buf, sizeof(JPG_Exif_IFD_start))<sizeof(JPG_Exif_IFD_start)) | |
| return; | |
| JPG_Exif_IFD_start *start=(JPG_Exif_IFD_start *)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(pool, 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(Pool& pool, | |
| Measure_reader& reader, | |
| const String *origin_string) { | |
| const void *buf; | |
| if(reader.read(buf, sizeof(JPG_Exif_segment_start))<sizeof(JPG_Exif_segment_start)) | |
| throw Exception("image.format", | |
| origin_string, | |
| "not JPEG file - can not fully read Exif segment start"); | |
| JPG_Exif_segment_start *start=(JPG_Exif_segment_start *)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(pool) VHash(pool); | |
| // IFD | |
| parse_IFD(pool, vhash.hash(0), is_big, reader, tiff_base); | |
| return &vhash; | |
| } | |
| static void measure_jpeg(Pool& pool, const String *origin_string, | |
| Measure_reader& reader, ushort& width, ushort& height, Value ** exif) { | |
| // JFIF format markers | // JFIF format markers |
| const unsigned char MARKER=0xFF; | const uchar MARKER=0xFF; |
| const unsigned char CODE_SIZE_FIRST=0xC0; | const uchar CODE_SIZE_A=0xC0; |
| const unsigned char CODE_SIZE_LAST=0xC3; | const uchar CODE_SIZE_B=0xC1; |
| const uchar CODE_SIZE_C=0xC2; | |
| const uchar CODE_SIZE_D=0xC3; | |
| const uchar CODE_EXIF=0xE1; | |
| void *buf; | const void *buf; |
| const size_t prefix_size=2; | const size_t prefix_size=2; |
| if(reader.read(buf, prefix_size)<prefix_size) | if(reader.read(buf, prefix_size)<prefix_size) |
| throw Exception("image.format", | throw Exception("image.format", |
| origin_string, | origin_string, |
| "not JPEG file - too small"); | "not JPEG file - too small"); |
| unsigned char *signature=(unsigned char *)buf; | uchar *signature=(uchar *)buf; |
| if(!(signature[0]==0xFF && signature[1]==0xD8)) | if(!(signature[0]==0xFF && signature[1]==0xD8)) |
| throw Exception("image.format", | throw Exception("image.format", |
| origin_string, | origin_string, |
| "not JPEG file - wrong signature"); | "not JPEG file - wrong signature"); |
| bool found=false; | |
| while(true) { | while(true) { |
| void *buf; | uint segment_base=reader.tell()+2/*marker,code*/; |
| // Extract the segment header. | |
| if(reader.read(buf, sizeof(JPG_Segment_head))<sizeof(JPG_Segment_head)) | if(reader.read(buf, sizeof(JPG_Segment_head))<sizeof(JPG_Segment_head)) |
| break; | break; |
| JPG_Segment_head *head=(JPG_Segment_head *)buf; | JPG_Segment_head *head=(JPG_Segment_head *)buf; |
| // Verify that it's a valid segment. | // Verify that it's a valid segment. |
| if(head->marker!=MARKER) | if(head->marker!=MARKER) |
| break; | throw Exception("image.format", |
| origin_string, | |
| "not JPEG file - marker not found"); | |
| if(head->code >= CODE_SIZE_FIRST && head->code <= CODE_SIZE_LAST) { | switch(head->code) { |
| // Segments that contain size info | // http://www.ba.wakwak.com/~tsuruzoh/Computer/Digicams/exif-e.html |
| if(reader.read(buf, sizeof(JPG_Size_segment_body))<sizeof(JPG_Size_segment_body)) | case CODE_EXIF: |
| break; | if(exif && !*exif) // seen .jpg with some xml under EXIF tag, after real exif block :) |
| JPG_Size_segment_body *body=(JPG_Size_segment_body *)buf; | *exif=parse_exif(pool, reader, origin_string); |
| width=big_endian_to_int(body->width); | |
| height=big_endian_to_int(body->height); | |
| found=true; | |
| break; | break; |
| } else { | |
| // Dummy read to skip over data | case CODE_SIZE_A: |
| size_t limit=big_endian_to_int(head->length) - 2; | case CODE_SIZE_B: |
| if(reader.read(buf, limit)<limit) | case CODE_SIZE_C: |
| break; | case CODE_SIZE_D: |
| } | { |
| // Segments that contain size info | |
| if(reader.read(buf, sizeof(JPG_Size_segment_body))<sizeof(JPG_Size_segment_body)) | |
| throw Exception("image.format", | |
| origin_string, | |
| "not JPEG file - can not fully read Size segment"); | |
| 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); | |
| } | } |
| if(!found) | throw Exception("image.format", |
| throw Exception("image.format", | origin_string, |
| origin_string, | "broken JPEG file - size frame not found"); |
| "broken JPEG file - size frame not found"); | |
| } | } |
| void measure_png(Pool& pool, const String *origin_string, | static void measure_png(Pool& pool, const String *origin_string, |
| Measure_reader& reader, int& width, int& height) { | Measure_reader& reader, ushort& width, ushort& height) { |
| void *buf; | const void *buf; |
| const int head_size=sizeof(PNG_Header); | const int head_size=sizeof(PNG_Header); |
| if(reader.read(buf, head_size)<head_size) | if(reader.read(buf, head_size)<head_size) |
| throw Exception("image.format", | throw Exception("image.format", |
| Line 221 void measure_png(Pool& pool, const Strin | Line 548 void measure_png(Pool& pool, const Strin |
| origin_string, | origin_string, |
| "not PNG file - wrong signature"); | "not PNG file - wrong signature"); |
| width=big_endian_to_int(head->width); | width=endian_to_ushort(true, head->width); |
| height=big_endian_to_int(head->height); | height=endian_to_ushort(true, head->height); |
| } | } |
| // measure center | // measure center |
| void measure(Pool& pool, const String& file_name, | static void measure(Pool& pool, 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(String::UL_FILE_SPEC), '.')) { | if(const char *cext=strrchr(file_name.cstr(String::UL_FILE_SPEC), '.')) { |
| cext++; | cext++; |
| if(strcasecmp(cext, "GIF")==0) | if(strcasecmp(cext, "GIF")==0) |
| measure_gif(pool, &file_name, reader, width, height); | measure_gif(pool, &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(pool, &file_name, reader, width, height, exif); |
| else if(strcasecmp(cext, "PNG")==0) | else if(strcasecmp(cext, "PNG")==0) |
| measure_png(pool, &file_name, reader, width, height); | measure_png(pool, &file_name, reader, width, height); |
| else | else |
| Line 247 void measure(Pool& pool, const String& f | Line 574 void measure(Pool& pool, const String& f |
| "can not determine image type - no file name extension"); | "can not determine image type - no file name extension"); |
| } | } |
| #ifndef DOXYGEN | // methods |
| struct Read_mem_info { | |
| unsigned char *ptr; | |
| unsigned char *eof; | |
| }; | |
| #endif | |
| 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; | |
| } | |
| #ifndef DOXYGEN | #ifndef DOXYGEN |
| struct Read_disk_info { | struct File_measure_action_info { |
| const String *file_spec; | ushort *width; |
| size_t offset; | ushort *height; |
| Value ** exif; | |
| const String *file_name; | |
| }; | }; |
| #endif | #endif |
| static size_t read_disk(void*& buf, size_t limit, void *info) { | static void file_measure_action(Pool& pool, |
| Read_disk_info& rdi=*static_cast<Read_disk_info *>(info); | struct stat& finfo, int f, |
| Pool& pool=rdi.file_spec->pool(); | const String& file_spec, const char *fname, bool as_text, |
| void *context) { | |
| size_t read_size; | File_measure_action_info& info=*static_cast<File_measure_action_info *>(context); |
| file_read(pool, *rdi.file_spec, | |
| buf, read_size, | |
| false/*as_text*/, | |
| true/*fail_on_read_problem*/, | |
| rdi.offset, limit); | |
| rdi.offset+=read_size; | Measure_file_reader reader(pool, f, *info.file_name, fname); |
| return read_size; | measure(pool, *info.file_name, reader, *info.width, *info.height, info.exif); |
| } | } |
| // methods | |
| static void _measure(Request& r, const String& method_name, MethodParams *params) { | static void _measure(Request& r, const String& method_name, MethodParams *params) { |
| Pool& pool=r.pool(); | Pool& pool=r.pool(); |
| Value& data=params->as_no_junction(0, "data must not be code"); | Value& data=params->as_no_junction(0, "data must not be code"); |
| void *info;Measure_reader::Func read_func; | ushort width=0; |
| Read_mem_info read_mem_info; | ushort height=0; |
| Read_disk_info read_disk_info; | Value *exif=0; |
| const String *file_name; | const String *file_name; |
| if(data.is_string()) { | if(file_name=data.get_string()) { |
| file_name=data.get_string(); | File_measure_action_info info={&width, &height, &exif, file_name}; |
| read_disk_info.file_spec=&r.absolute(*file_name); | file_read_action_under_lock(pool, r.absolute(*file_name), |
| read_disk_info.offset=0; | "measure", file_measure_action, &info); |
| info=&read_disk_info;read_func=read_disk; | |
| } else { | } else { |
| const VFile& vfile=*data.as_vfile(); | const VFile& vfile=*data.as_vfile(); |
| file_name=&static_cast<Value *>(vfile.fields().get(*name_name))->as_string(); | file_name=&static_cast<Value *>(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(pool, *file_name, reader, width, height, &exif); | |
| } | } |
| Measure_reader reader(read_func, info); | VImage &vimage=*static_cast<VImage *>(r.get_self()); |
| int width, height; | vimage.set(file_name, width, height, 0, exif); |
| measure(pool, *file_name, reader, width, height); | |
| static_cast<VImage *>(r.self)->set(file_name, width, height); | |
| } | } |
| #ifndef DOXYGEN | #ifndef DOXYGEN |
| Line 338 static void _html(Request& r, const Stri | Line 647 static void _html(Request& r, const Stri |
| String tag(pool); | String tag(pool); |
| tag << "<img"; | tag << "<img"; |
| const Hash& fields=static_cast<VImage *>(r.self)->fields(); | const Hash& fields=static_cast<VImage *>(r.get_self())->fields(); |
| Hash *attribs=0; | Hash *attribs=0; |
| if(params->size()) { | if(params->size()) { |
| Line 346 static void _html(Request& r, const Stri | Line 655 static void _html(Request& r, const Stri |
| Value &vattribs=r.process_to_value(params->get(0), | Value &vattribs=r.process_to_value(params->get(0), |
| /*0/*no name* /,*/ | /*0/*no name* /,*/ |
| false/*don't intercept string*/); | false/*don't intercept string*/); |
| if(vattribs.is_defined()) // allow 'void' | if(!vattribs.is_string()) // allow empty |
| if(attribs=vattribs.get_hash(&method_name)) { | if(attribs=vattribs.get_hash(&method_name)) { |
| Attrib_info attrib_info={&tag, 0}; | Attrib_info attrib_info={&tag, 0}; |
| attribs->for_each(append_attrib_pair, &attrib_info); | attribs->for_each(append_attrib_pair, &attrib_info); |
| Line 394 static void _load(Request& r, const Stri | Line 703 static void _load(Request& r, const Stri |
| gdImage& image=*load(r, method_name, file_name); | gdImage& image=*load(r, method_name, file_name); |
| int width=image.SX(); | int width=image.SX(); |
| int height=image.SY(); | int height=image.SY(); |
| static_cast<VImage *>(r.self)->set(&file_name, width, height, &image); | static_cast<VImage *>(r.get_self())->set(&file_name, width, height, &image); |
| } | } |
| static void _create(Request& r, const String& method_name, MethodParams *params) { | static void _create(Request& r, const String& method_name, MethodParams *params) { |
| Line 408 static void _create(Request& r, const St | Line 717 static void _create(Request& r, const St |
| gdImage& image=*new(pool) gdImage(pool); | gdImage& image=*new(pool) gdImage(pool); |
| 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); | static_cast<VImage *>(r.get_self())->set(0, width, height, &image); |
| } | } |
| static void _gif(Request& r, const String& method_name, MethodParams *params) { | static void _gif(Request& r, const String& method_name, MethodParams *params) { |
| Pool& pool=r.pool(); | Pool& pool=r.pool(); |
| gdImage *image=static_cast<VImage *>(r.self)->image; | gdImage *image=static_cast<VImage *>(r.get_self())->image; |
| if(!image) | if(!image) |
| throw Exception(0, | throw Exception(0, |
| &method_name, | &method_name, |
| Line 435 static void _gif(Request& r, const Strin | Line 744 static void _gif(Request& r, const Strin |
| static void _line(Request& r, const String& method_name, MethodParams *params) { | static void _line(Request& r, const String& method_name, MethodParams *params) { |
| Pool& pool=r.pool(); | Pool& pool=r.pool(); |
| gdImage *image=static_cast<VImage *>(r.self)->image; | gdImage *image=static_cast<VImage *>(r.get_self())->image; |
| if(!image) | if(!image) |
| throw Exception(0, | throw Exception(0, |
| &method_name, | &method_name, |
| Line 452 static void _line(Request& r, const Stri | Line 761 static void _line(Request& r, const Stri |
| static void _fill(Request& r, const String& method_name, MethodParams *params) { | static void _fill(Request& r, const String& method_name, MethodParams *params) { |
| Pool& pool=r.pool(); | Pool& pool=r.pool(); |
| gdImage *image=static_cast<VImage *>(r.self)->image; | gdImage *image=static_cast<VImage *>(r.get_self())->image; |
| if(!image) | if(!image) |
| throw Exception(0, | throw Exception(0, |
| &method_name, | &method_name, |
| Line 467 static void _fill(Request& r, const Stri | Line 776 static void _fill(Request& r, const Stri |
| static void _rectangle(Request& r, const String& method_name, MethodParams *params) { | static void _rectangle(Request& r, const String& method_name, MethodParams *params) { |
| Pool& pool=r.pool(); | Pool& pool=r.pool(); |
| gdImage *image=static_cast<VImage *>(r.self)->image; | gdImage *image=static_cast<VImage *>(r.get_self())->image; |
| if(!image) | if(!image) |
| throw Exception(0, | throw Exception(0, |
| &method_name, | &method_name, |
| Line 484 static void _rectangle(Request& r, const | Line 793 static void _rectangle(Request& r, const |
| static void _bar(Request& r, const String& method_name, MethodParams *params) { | static void _bar(Request& r, const String& method_name, MethodParams *params) { |
| Pool& pool=r.pool(); | Pool& pool=r.pool(); |
| gdImage *image=static_cast<VImage *>(r.self)->image; | gdImage *image=static_cast<VImage *>(r.get_self())->image; |
| if(!image) | if(!image) |
| throw Exception(0, | throw Exception(0, |
| &method_name, | &method_name, |
| Line 511 static void add_point(Array::Item *value | Line 820 static void add_point(Array::Item *value |
| static void _replace(Request& r, const String& method_name, MethodParams *params) { | static void _replace(Request& r, const String& method_name, MethodParams *params) { |
| Pool& pool=r.pool(); | Pool& pool=r.pool(); |
| gdImage *image=static_cast<VImage *>(r.self)->image; | gdImage *image=static_cast<VImage *>(r.get_self())->image; |
| if(!image) | if(!image) |
| throw Exception(0, | throw Exception(0, |
| &method_name, | &method_name, |
| Line 534 static void _replace(Request& r, const S | Line 843 static void _replace(Request& r, const S |
| static void _polyline(Request& r, const String& method_name, MethodParams *params) { | static void _polyline(Request& r, const String& method_name, MethodParams *params) { |
| Pool& pool=r.pool(); | Pool& pool=r.pool(); |
| gdImage *image=static_cast<VImage *>(r.self)->image; | gdImage *image=static_cast<VImage *>(r.get_self())->image; |
| if(!image) | if(!image) |
| throw Exception(0, | throw Exception(0, |
| &method_name, | &method_name, |
| Line 557 static void _polyline(Request& r, const | Line 866 static void _polyline(Request& r, const |
| static void _polygon(Request& r, const String& method_name, MethodParams *params) { | static void _polygon(Request& r, const String& method_name, MethodParams *params) { |
| Pool& pool=r.pool(); | Pool& pool=r.pool(); |
| gdImage *image=static_cast<VImage *>(r.self)->image; | gdImage *image=static_cast<VImage *>(r.get_self())->image; |
| if(!image) | if(!image) |
| throw Exception(0, | throw Exception(0, |
| &method_name, | &method_name, |
| Line 579 static void _polygon(Request& r, const S | Line 888 static void _polygon(Request& r, const S |
| static void _polybar(Request& r, const String& method_name, MethodParams *params) { | static void _polybar(Request& r, const String& method_name, MethodParams *params) { |
| Pool& pool=r.pool(); | Pool& pool=r.pool(); |
| gdImage *image=static_cast<VImage *>(r.self)->image; | gdImage *image=static_cast<VImage *>(r.get_self())->image; |
| if(!image) | if(!image) |
| throw Exception(0, | throw Exception(0, |
| &method_name, | &method_name, |
| Line 600 static void _polybar(Request& r, const S | Line 909 static void _polybar(Request& r, const S |
| // font | // font |
| #define Y(y)(y+index*height+1) | #define Y(y)(y+index*height) |
| /// simple gdImage-based font storage & text output | /// simple gdImage-based font storage & text output |
| class Font : public Pooled { | class Font: public Pooled { |
| public: | public: |
| const static int letter_spacing; | const static int letter_spacing; |
| Line 615 public: | Line 924 public: |
| Font(Pool& pool, | Font(Pool& pool, |
| const String& aalphabet, | const String& aalphabet, |
| gdImage& aifont, int aheight, int amonospace, int aspacebarspace) : Pooled(pool), | gdImage& aifont, int aheight, int amonospace, int aspacebarspace): Pooled(pool), |
| alphabet(aalphabet), | alphabet(aalphabet), |
| height(aheight), monospace(amonospace), spacebarspace(aspacebarspace), | height(aheight), monospace(amonospace), spacebarspace(aspacebarspace), |
| ifont(aifont) { | ifont(aifont) { |
| Line 633 public: | Line 942 public: |
| return spacebarspace; | return spacebarspace; |
| int tr=ifont.GetTransparent(); | int tr=ifont.GetTransparent(); |
| for(int x=ifont.SX()-1; x>=0; x--) { | for(int x=ifont.SX()-1; x>=0; x--) { |
| for(int y=0; y<height-1; y++) | for(int y=0; y<height; y++) |
| if(ifont.GetPixel(x, Y(y))!=tr) | if(ifont.GetPixel(x, Y(y))!=tr) |
| return x+1; | return x+1; |
| } | } |
| Line 642 public: | Line 951 public: |
| void index_display(gdImage& image, int x, int y, int index){ | void index_display(gdImage& image, int x, int y, int index){ |
| if(index>=0) | if(index>=0) |
| ifont.Copy(image, x, y, 0, Y(0), index_width(index), height-1); | ifont.Copy(image, x, y, 0, Y(0), index_width(index), height); |
| } | } |
| /* ******************************** string ********************************** */ | /* ******************************** string ********************************** */ |
| int step_width(int index) { | |
| return letter_spacing + (monospace ? monospace : index_width(index)); | |
| } | |
| // counts trailing letter_spacing, consider this OK. useful for contiuations | |
| int string_width(const String& s){ | int string_width(const String& s){ |
| const char *cstr=s.cstr(); | const char *cstr=s.cstr(); |
| int result=0; | int result=0; |
| for(; *cstr; cstr++) | for(; *cstr; cstr++) |
| result+=index_width(index_of(*cstr)); | result+=step_width(index_of(*cstr)); |
| return result; | return result; |
| } | } |
| Line 660 public: | Line 974 public: |
| if(cstr) for(; *cstr; cstr++) { | if(cstr) for(; *cstr; cstr++) { |
| int index=index_of(*cstr); | int index=index_of(*cstr); |
| index_display(image, x, y, index); | index_display(image, x, y, index); |
| x+=letter_spacing + (monospace ? monospace : index_width(index)); | x+=step_width(index); |
| } | } |
| } | } |
| Line 685 static void _font(Request& r, const Stri | Line 999 static void _font(Request& r, const Stri |
| throw Exception("parser.runtime", | throw Exception("parser.runtime", |
| &method_name, | &method_name, |
| "alphabet must not be empty"); | "alphabet must not be empty"); |
| if(int remainder=image.SY() % alphabet.size()) | |
| throw Exception("parser.runtime", | |
| &method_name, | |
| "font-file height(%d) not divisable by alphabet size(%d), remainder=%d", | |
| image.SY(), alphabet.size(), remainder); | |
| static_cast<VImage *>(r.self)->font=new(pool) Font(pool, | static_cast<VImage *>(r.get_self())->font=new(pool) Font(pool, |
| alphabet, | alphabet, |
| image, | image, |
| image.SY() / alphabet.size(), monospace_width, spacebar_width); | image.SY() / alphabet.size(), monospace_width, spacebar_width); |
| Line 699 static void _text(Request& r, const Stri | Line 1019 static void _text(Request& r, const Stri |
| int y=params->as_int(1, "y 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"); | const String& s=params->as_string(2, "text must not be code"); |
| VImage& vimage=*static_cast<VImage *>(r.self); | VImage& vimage=*static_cast<VImage *>(r.get_self()); |
| 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); |
| Line 718 static void _length(Request& r, const St | Line 1038 static void _length(Request& r, const St |
| const String& s=params->as_string(0, "text must not be code"); | const String& s=params->as_string(0, "text must not be code"); |
| VImage& vimage=*static_cast<VImage *>(r.self); | VImage& vimage=*static_cast<VImage *>(r.get_self()); |
| if(vimage.image) | if(vimage.image) |
| if(vimage.font) { | if(vimage.font) { |
| r.write_no_lang(*new(pool) VInt(pool, vimage.font->string_width(s))); | r.write_no_lang(*new(pool) VInt(pool, vimage.font->string_width(s))); |
| Line 735 static void _length(Request& r, const St | Line 1055 static void _length(Request& r, const St |
| static void _arc(Request& r, const String& method_name, MethodParams *params) { | static void _arc(Request& r, const String& method_name, MethodParams *params) { |
| Pool& pool=r.pool(); | Pool& pool=r.pool(); |
| gdImage *image=static_cast<VImage *>(r.self)->image; | gdImage *image=static_cast<VImage *>(r.get_self())->image; |
| if(!image) | if(!image) |
| throw Exception(0, | throw Exception(0, |
| &method_name, | &method_name, |
| Line 754 static void _arc(Request& r, const Strin | Line 1074 static void _arc(Request& r, const Strin |
| static void _sector(Request& r, const String& method_name, MethodParams *params) { | static void _sector(Request& r, const String& method_name, MethodParams *params) { |
| Pool& pool=r.pool(); | Pool& pool=r.pool(); |
| gdImage *image=static_cast<VImage *>(r.self)->image; | gdImage *image=static_cast<VImage *>(r.get_self())->image; |
| if(!image) | if(!image) |
| throw Exception(0, | throw Exception(0, |
| &method_name, | &method_name, |
| Line 773 static void _sector(Request& r, const St | Line 1093 static void _sector(Request& r, const St |
| static void _circle(Request& r, const String& method_name, MethodParams *params) { | static void _circle(Request& r, const String& method_name, MethodParams *params) { |
| Pool& pool=r.pool(); | Pool& pool=r.pool(); |
| gdImage *image=static_cast<VImage *>(r.self)->image; | gdImage *image=static_cast<VImage *>(r.get_self())->image; |
| if(!image) | if(!image) |
| throw Exception(0, | throw Exception(0, |
| &method_name, | &method_name, |
| Line 792 static void _circle(Request& r, const St | Line 1112 static void _circle(Request& r, const St |
| gdImage& as_image(Pool& pool, const String& method_name, MethodParams *params, | gdImage& as_image(Pool& pool, const String& method_name, MethodParams *params, |
| int index, const char *msg) { | int index, const char *msg) { |
| Value& value=params->as_no_junction(index, msg); | gdImage *src=0; |
| if(strcmp(value.type(), VIMAGE_TYPE)!=0) | Value& value=params->as_no_junction(index, msg); |
| throw Exception("parser.runtime", | |
| &method_name, | |
| msg); | |
| gdImage *src=static_cast<VImage *>(&value)->image; | if(Value *vimage=value.as(VIMAGE_TYPE, false)) { |
| if(!src) | src=static_cast<VImage *>(vimage)->image; |
| if(!src) | |
| throw Exception("parser.runtime", | |
| &method_name, | |
| msg); | |
| } else | |
| throw Exception("parser.runtime", | throw Exception("parser.runtime", |
| &method_name, | &method_name, |
| msg); | msg); |
| Line 811 gdImage& as_image(Pool& pool, const Stri | Line 1133 gdImage& as_image(Pool& pool, const Stri |
| static void _copy(Request& r, const String& method_name, MethodParams *params) { | static void _copy(Request& r, const String& method_name, MethodParams *params) { |
| Pool& pool=r.pool(); | Pool& pool=r.pool(); |
| gdImage *dest=static_cast<VImage *>(r.self)->image; | gdImage *dest=static_cast<VImage *>(r.get_self())->image; |
| if(!dest) | if(!dest) |
| throw Exception(0, | throw Exception(0, |
| &method_name, | &method_name, |