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/* image.h
Copyright 1996-2006 Han The Thanh <thanh@pdftex.org>
Copyright 2006-2010 Taco Hoekwater <taco@luatex.org>
This file is part of LuaTeX.
LuaTeX 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.
LuaTeX 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 Lesser General Public
License for more details.
You should have received a copy of the GNU General Public License along
with LuaTeX; if not, see <http://www.gnu.org/licenses/>. */
#ifndef IMAGE_H
# define IMAGE_H
# include <png.h>
# include "pdf/pdftypes.h" /* for scaled_whd */
# define JPG_UINT16 unsigned int
# define JPG_UINT32 unsigned long
# define JPG_UINT8 unsigned char
extern int do_zround(double r); /* from utils.w */
extern scaled one_hundred_bp; /* from pdfgen.w */
# define bp2sp(p) do_zround(p * (one_hundred_bp / 100.0))
# define sp2bp(i) (i * 100.0 / one_hundred_bp)
# define TYPE_IMG "image.meta"
# define TYPE_IMG_DICT "image.dict"
/**********************************************************************/
typedef struct {
char *stream;
} pdf_stream_struct;
typedef struct {
png_structp png_ptr;
png_infop info_ptr;
} png_img_struct;
typedef struct {
int color_space; /* used color space. See JPG_ constants */
JPG_UINT32 length; /* length of file/data */
} jpg_img_struct;
typedef struct {
int length; /* length of file/data */
} jp2_img_struct;
# if 0
typedef struct { /* currently unused */
} jb2_img_struct;
# endif
typedef enum { DICT_NEW, /* fresh dictionary */
DICT_FILESCANNED, /* image file scanned */
DICT_REFERED, /* pdf_refximage_node in node list --> read-only dict */
DICT_OUTIMG, /* /Im* appears in pagestream */
DICT_SCHEDULED, /* image dict scheduled for writing (PONR) */
DICT_WRITTEN /* image dict written to file */
} dict_state;
typedef enum { IMG_TYPE_NONE, IMG_TYPE_PDF, IMG_TYPE_PNG, IMG_TYPE_JPG,
IMG_TYPE_JP2, IMG_TYPE_JBIG2, IMG_TYPE_PDFSTREAM, IMG_TYPE_PDFMEMSTREAM, IMG_TYPE_SENTINEL
} imgtype_e;
typedef enum { IMG_KEEPOPEN, IMG_CLOSEINBETWEEN } img_readtype_e;
typedef enum { PDF_BOX_SPEC_NONE, PDF_BOX_SPEC_MEDIA, PDF_BOX_SPEC_CROP,
PDF_BOX_SPEC_BLEED, PDF_BOX_SPEC_TRIM, PDF_BOX_SPEC_ART,
PDF_BOX_SPEC_SENTINEL
} pdfboxspec_e;
/**********************************************************************/
typedef struct {
int objnum;
int index; /* /Im1, /Im2, ... */
scaled_whd dimen; /* TeX dimensions given to \pdfximage */
int transform; /* transform given to \pdfximage */
int x_size; /* dimensions in pixel counts as in JPG/PNG/JBIG2 file */
int y_size;
int x_orig; /* origin in sp for PDF files */
int y_orig;
int x_res; /* pixel resolution as in JPG/PNG/JBIG2 file */
int y_res;
int rotation; /* rotation (multiples of 90 deg.) for PDF files */
int colorspace; /* number of /ColorSpace object */
int group_ref; /* if it's <=0, the page has no group */
int total_pages;
int page_num; /* requested page (by number) */
char *pagename; /* requested page (by name) */
char *filename; /* requested raw file name */
char *visiblefilename; /* blocks or overwrites filename as it appears in PDF output */
char *filepath; /* full file path after kpathsea */
char *attr; /* additional image dict entries */
FILE *file;
imgtype_e image_type;
int procset; /* /ProcSet flags */
int color_depth; /* color depth */
pdfboxspec_e page_box_spec; /* PDF page box spec.: media/crop/bleed/trim/art */
int bbox[4];
dict_state state;
int flags;
union {
pdf_stream_struct *pdfstream;
png_img_struct *png;
jpg_img_struct *jpg;
jp2_img_struct *jp2;
/* jb2_img_struct *jb2; */
} img_struct;
} image_dict;
# define img_objnum(N) ((N)->objnum)
# define img_index(N) ((N)->index)
# define img_dimen(N) ((N)->dimen)
# define img_width(N) ((N)->dimen.wd)
# define img_height(N) ((N)->dimen.ht)
# define img_depth(N) ((N)->dimen.dp)
# define img_transform(N) ((N)->transform)
# define img_xsize(N) ((N)->x_size)
# define img_ysize(N) ((N)->y_size)
# define img_xorig(N) ((N)->x_orig)
# define img_yorig(N) ((N)->y_orig)
# define img_xres(N) ((N)->x_res)
# define img_yres(N) ((N)->y_res)
# define img_rotation(N) ((N)->rotation)
# define img_colorspace(N) ((N)->colorspace)
# define img_group_ref(N) ((N)->group_ref)
# define img_totalpages(N) ((N)->total_pages)
# define img_pagenum(N) ((N)->page_num)
# define img_pagename(N) ((N)->pagename)
# define img_filename(N) ((N)->filename)
# define img_visiblefilename(N)((N)->visiblefilename)
# define img_filepath(N) ((N)->filepath)
# define img_attr(N) ((N)->attr)
# define img_file(N) ((N)->file)
# define img_type(N) ((N)->image_type)
# define img_procset(N) ((N)->procset)
# define img_colordepth(N) ((N)->color_depth)
# define img_pagebox(N) ((N)->page_box_spec)
# define img_bbox(N) ((N)->bbox)
# define img_state(N) ((N)->state)
# define img_flags(N) ((N)->flags)
# define img_pdfstream_ptr(N) ((N)->img_struct.pdfstream)
# define img_pdfstream_stream(N) ((N)->img_struct.pdfstream->stream)
# define img_png_ptr(N) ((N)->img_struct.png)
# define img_png_png_ptr(N) ((N)->img_struct.png->png_ptr)
# define img_png_info_ptr(N) ((N)->img_struct.png->info_ptr)
# define img_jpg_ptr(N) ((N)->img_struct.jpg)
# define img_jpg_color(N) ((N)->img_struct.jpg->color_space)
# define img_jp2_ptr(N) ((N)->img_struct.jp2)
# define img_jb2_ptr(N) ((N)->img_struct.jb2)
# define F_FLAG_BBOX (1 << 0)
# define F_FLAG_GROUP (1 << 1)
# define img_set_bbox(N) (img_flags(N) |= F_FLAG_BBOX)
# define img_unset_bbox(N) (img_flags(N) &= ~F_FLAG_BBOX)
# define img_is_bbox(N) ((img_flags(N) & F_FLAG_BBOX) != 0)
# define img_set_group(N) (img_flags(N) |= F_FLAG_GROUP)
# define img_unset_group(N) (img_flags(N) &= ~F_FLAG_GROUP)
# define img_is_group(N) ((img_flags(N) & F_FLAG_GROUP) != 0)
# define epdf_xsize(a) img_xsize(idict_array[a])
# define epdf_ysize(a) img_ysize(idict_array[a])
# define epdf_orig_x(a) img_xorig(idict_array[a])
# define epdf_orig_y(a) img_yorig(idict_array[a])
# define is_pdf_image(a) ((img_type(idict_array[a]) == IMG_TYPE_PDF) || (img_type(idict_array[a]) == IMG_TYPE_PDFMEMSTREAM))
# define is_png_image(a) (img_type(idict_array[a]) == IMG_TYPE_PNG)
# define img_is_refered(N) (img_index(N) != -1)
/**********************************************************************/
/* image structure corresponds to pdfrefximage node */
typedef struct {
scaled_whd dimen; /* requested/actual TeX dimensions */
int transform;
image_dict *dict;
int dict_ref; /* luaL_ref() reference */
} image;
# define img_dict(N) ((N)->dict)
# define img_dictref(N) ((N)->dict_ref)
# define set_wd_running(N) (img_width(N) = null_flag)
# define set_ht_running(N) (img_height(N) = null_flag)
# define set_dp_running(N) (img_depth(N) = null_flag)
# define is_wd_running(N) (img_width(N) == null_flag)
# define is_ht_running(N) (img_height(N) == null_flag)
# define is_dp_running(N) (img_depth(N) == null_flag)
#endif /* IMAGE_H */
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