diff options
author | Karl Berry <karl@freefriends.org> | 2006-01-17 21:41:51 +0000 |
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committer | Karl Berry <karl@freefriends.org> | 2006-01-17 21:41:51 +0000 |
commit | 487ca4806cc046076293cf6cc5fbba0db282bac7 (patch) | |
tree | 847b412ab5158dd7bdd7ed7e5a4cc3fbca94be32 /Build/source/texk/web2c/pdftexdir/writejpg.c | |
parent | a3d3111bfe26b8e5f5bc6049dfb2a4ca2edc7881 (diff) |
texk 1
git-svn-id: svn://tug.org/texlive/trunk@1485 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/texk/web2c/pdftexdir/writejpg.c')
-rw-r--r-- | Build/source/texk/web2c/pdftexdir/writejpg.c | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/Build/source/texk/web2c/pdftexdir/writejpg.c b/Build/source/texk/web2c/pdftexdir/writejpg.c new file mode 100644 index 00000000000..1b01737e4e5 --- /dev/null +++ b/Build/source/texk/web2c/pdftexdir/writejpg.c @@ -0,0 +1,227 @@ +/* +Copyright (c) 1996-2002 Han The Thanh, <thanh@pdftex.org> + +This file is part of pdfTeX. + +pdfTeX is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. + +pdfTeX is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with pdfTeX; if not, write to the Free Software +Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + +$Id: //depot/Build/source.development/TeX/texk/web2c/pdftexdir/writejpg.c#10 $ +*/ + +#include "ptexlib.h" +#include "image.h" + +#define JPG_GRAY 1 /* Gray color space, use /DeviceGray */ +#define JPG_RGB 3 /* RGB color space, use /DeviceRGB */ +#define JPG_CMYK 4 /* CMYK color space, use /DeviceCMYK */ + +typedef enum { /* JPEG marker codes */ + M_SOF0 = 0xc0, /* baseline DCT */ + M_SOF1 = 0xc1, /* extended sequential DCT */ + M_SOF2 = 0xc2, /* progressive DCT */ + M_SOF3 = 0xc3, /* lossless (sequential) */ + + M_SOF5 = 0xc5, /* differential sequential DCT */ + M_SOF6 = 0xc6, /* differential progressive DCT */ + M_SOF7 = 0xc7, /* differential lossless */ + + M_JPG = 0xc8, /* JPEG extensions */ + M_SOF9 = 0xc9, /* extended sequential DCT */ + M_SOF10 = 0xca, /* progressive DCT */ + M_SOF11 = 0xcb, /* lossless (sequential) */ + + M_SOF13 = 0xcd, /* differential sequential DCT */ + M_SOF14 = 0xce, /* differential progressive DCT */ + M_SOF15 = 0xcf, /* differential lossless */ + + M_DHT = 0xc4, /* define Huffman tables */ + + M_DAC = 0xcc, /* define arithmetic conditioning table */ + + M_RST0 = 0xd0, /* restart */ + M_RST1 = 0xd1, /* restart */ + M_RST2 = 0xd2, /* restart */ + M_RST3 = 0xd3, /* restart */ + M_RST4 = 0xd4, /* restart */ + M_RST5 = 0xd5, /* restart */ + M_RST6 = 0xd6, /* restart */ + M_RST7 = 0xd7, /* restart */ + + M_SOI = 0xd8, /* start of image */ + M_EOI = 0xd9, /* end of image */ + M_SOS = 0xda, /* start of scan */ + M_DQT = 0xdb, /* define quantization tables */ + M_DNL = 0xdc, /* define number of lines */ + M_DRI = 0xdd, /* define restart interval */ + M_DHP = 0xde, /* define hierarchical progression */ + M_EXP = 0xdf, /* expand reference image(s) */ + + M_APP0 = 0xe0, /* application marker, used for JFIF */ + M_APP1 = 0xe1, /* application marker */ + M_APP2 = 0xe2, /* application marker */ + M_APP3 = 0xe3, /* application marker */ + M_APP4 = 0xe4, /* application marker */ + M_APP5 = 0xe5, /* application marker */ + M_APP6 = 0xe6, /* application marker */ + M_APP7 = 0xe7, /* application marker */ + M_APP8 = 0xe8, /* application marker */ + M_APP9 = 0xe9, /* application marker */ + M_APP10 = 0xea, /* application marker */ + M_APP11 = 0xeb, /* application marker */ + M_APP12 = 0xec, /* application marker */ + M_APP13 = 0xed, /* application marker */ + M_APP14 = 0xee, /* application marker, used by Adobe */ + M_APP15 = 0xef, /* application marker */ + + M_JPG0 = 0xf0, /* reserved for JPEG extensions */ + M_JPG13 = 0xfd, /* reserved for JPEG extensions */ + M_COM = 0xfe, /* comment */ + + M_TEM = 0x01, /* temporary use */ + + M_ERROR = 0x100 /* dummy marker, internal use only */ +} JPEG_MARKER; + +static JPG_UINT16 read2bytes(FILE *f) +{ + int c = xgetc(f); + return (c << 8) + xgetc(f); +} + +void read_jpg_info(integer img) +{ + int i; + char jpg_id[]="JFIF"; + int units=0; + img_xres(img)=img_yres(img)=0; + jpg_ptr(img)->file = xfopen(img_name(img), FOPEN_RBIN_MODE); + xfseek(jpg_ptr(img)->file,0,SEEK_END,cur_file_name); + jpg_ptr(img)->length=xftell(jpg_ptr(img)->file,cur_file_name); + xfseek(jpg_ptr(img)->file,0,SEEK_SET,cur_file_name); + if(read2bytes(jpg_ptr(img)->file)!=0xFFD8) + pdftex_fail("reading JPEG image failed"); + + if(read2bytes(jpg_ptr(img)->file)==0xFFE0) { /* JFIF APP0 */ + (void)read2bytes(jpg_ptr(img)->file); + for(i=0;i<5;i++) if(xgetc(jpg_ptr(img)->file)!=jpg_id[i]) + pdftex_fail("reading JPEG image failed"); + (void)read2bytes(jpg_ptr(img)->file); + units=xgetc(jpg_ptr(img)->file); + img_xres(img)=read2bytes(jpg_ptr(img)->file); + img_yres(img)=read2bytes(jpg_ptr(img)->file); + switch(units) { + case 1: break; /* pixels per inch */ + case 2: img_xres(img)*=2.54; img_yres(img)*=2.54; + break; /* pixels per cm */ + default:img_xres(img)=img_yres(img)=0; break; + } + } + + xfseek(jpg_ptr(img)->file,0,SEEK_SET,cur_file_name); + while(1) { + if(feof(jpg_ptr(img)->file) || fgetc(jpg_ptr(img)->file)!=0xFF) + pdftex_fail("reading JPEG image failed"); + switch(xgetc(jpg_ptr(img)->file)) { + case M_SOF5: + case M_SOF6: + case M_SOF7: + case M_SOF9: + case M_SOF10: + case M_SOF11: + case M_SOF13: + case M_SOF14: + case M_SOF15: + pdftex_fail("unsupported type of compression"); + case M_SOF2: + if (fixedpdfminorversion <= 2) + pdftex_fail("cannot use progressive DCT with PDF-1.2"); + case M_SOF0: + case M_SOF1: + case M_SOF3: + (void)read2bytes(jpg_ptr(img)->file); /* read segment length */ + jpg_ptr(img)->bits_per_component = xgetc(jpg_ptr(img)->file); + img_height(img) = read2bytes(jpg_ptr(img)->file); + img_width(img) = read2bytes(jpg_ptr(img)->file); + jpg_ptr(img)->color_space = xgetc(jpg_ptr(img)->file); + xfseek(jpg_ptr(img)->file,0,SEEK_SET,cur_file_name); + switch (jpg_ptr(img)->color_space) { + case JPG_GRAY: + img_color(img) = IMAGE_COLOR_B; + break; + case JPG_RGB: + img_color(img) = IMAGE_COLOR_C; + break; + case JPG_CMYK: + img_color(img) = IMAGE_COLOR_C; + break; + default: + pdftex_fail("Unsupported color space %i", + (int)jpg_ptr(img)->color_space); + } + return; + case M_SOI: /* ignore markers without parameters */ + case M_EOI: + case M_TEM: + case M_RST0: + case M_RST1: + case M_RST2: + case M_RST3: + case M_RST4: + case M_RST5: + case M_RST6: + case M_RST7: + break; + default: /* skip variable length markers */ + xfseek(jpg_ptr(img)->file,read2bytes(jpg_ptr(img)->file)-2,SEEK_CUR,cur_file_name); + break; + } + } +} + +void write_jpg(integer img) +{ + long unsigned l; + FILE *f; + pdf_puts("/Type /XObject\n/Subtype /Image\n"); + pdf_printf("/Width %i\n/Height %i\n/BitsPerComponent %i\n/Length %i\n", + img_width(img), + img_height(img), + (int)jpg_ptr(img)->bits_per_component, + (int)jpg_ptr(img)->length); + pdf_puts("/ColorSpace "); + if (img_colorspace_ref(img) != 0) { + pdf_printf("%i 0 R\n", (int)img_colorspace_ref(img)); + } + else { + switch (jpg_ptr(img)->color_space) { + case JPG_GRAY: + pdf_puts("/DeviceGray\n"); + break; + case JPG_RGB: + pdf_puts("/DeviceRGB\n"); + break; + case JPG_CMYK: + pdf_puts("/DeviceCMYK\n/Decode [1 0 1 0 1 0 1 0]\n"); + break; + default: + pdftex_fail("Unsupported color space %i", + (int)jpg_ptr(img)->color_space); + } + } + pdf_puts("/Filter /DCTDecode\n>>\nstream\n"); + for (l = jpg_ptr(img)->length, f = jpg_ptr(img)->file; l > 0; l--) + pdfout(xgetc(f)); + pdf_puts("endstream\nendobj\n"); +} |