/* Creates the PDF Encoding entry for the encoding.
* If baseenc is non-null, it is used as BaseEncoding entry.
*/
static pdf_obj *
create_encoding_resource (pdf_encoding *encoding, pdf_encoding *baseenc)
{
pdf_obj *differences;
ASSERT(encoding);
ASSERT(!encoding->resource);
differences = make_encoding_differences(encoding->glyphs,
baseenc ? baseenc->glyphs : NULL,
encoding->is_used);
if (differences) {
pdf_obj *resource = pdf_new_dict();
if (baseenc)
pdf_add_dict(resource, pdf_new_name("BaseEncoding"),
pdf_link_obj(baseenc->resource));
pdf_add_dict(resource, pdf_new_name("Differences"), differences);
return resource;
} else {
/* Fix a bug with the MinionPro package using MnSymbol fonts
* in its virtual fonts:
*
* Some font may have font_id even if no character is used.
* For example, suppose that a virtual file A.vf uses two
* other fonts, B and C. Even if only characters of B are used
* in a DVI document, C will have font_id too.
* In this case, both baseenc and differences can be NULL.
*
* Actually these fonts will be ignored in pdffont.c.
*/
return baseenc ? pdf_link_obj(baseenc->resource) : NULL;
}
}
static void
pdf_flush_font (pdf_font *font)
{
char *fontname, *uniqueTag;
if (!font) {
return;
}
if (font->resource && font->reference) {
if (font->subtype != PDF_FONT_FONTTYPE_TYPE3) {
if (pdf_font_get_flag(font, PDF_FONT_FLAG_NOEMBED)) {
pdf_add_dict(font->resource,
pdf_new_name("BaseFont"), pdf_new_name(font->fontname));
if (font->descriptor) {
pdf_add_dict(font->descriptor,
pdf_new_name("FontName"), pdf_new_name(font->fontname));
}
} else {
if (!font->fontname) {
ERROR("Undefined in fontname... (%s)", font->ident);
}
fontname = NEW(7+strlen(font->fontname)+1, char);
uniqueTag = pdf_font_get_uniqueTag(font);
sprintf(fontname, "%6s+%s", uniqueTag, font->fontname);
pdf_add_dict(font->resource,
pdf_new_name("BaseFont"), pdf_new_name(fontname));
if (font->descriptor) {
pdf_add_dict(font->descriptor,
pdf_new_name("FontName"), pdf_new_name(fontname));
}
RELEASE(fontname);
}
if (font->descriptor) {
pdf_add_dict(font->resource,
pdf_new_name("FontDescriptor"), pdf_ref_obj(font->descriptor));
}
}
}
if (font->resource)
pdf_release_obj(font->resource);
if (font->descriptor)
pdf_release_obj(font->descriptor);
if (font->reference)
pdf_release_obj(font->reference);
font->reference = NULL;
font->resource = NULL;
font->descriptor = NULL;
return;
}
void
Type0Font_set_ToUnicode (Type0Font *font, pdf_obj *cmap_ref)
{
ASSERT(font);
pdf_add_dict(font->fontdict,
pdf_new_name("ToUnicode"), cmap_ref);
}
static pdf_obj *
create_cspace_ICCBased (png_structp png_ptr, png_infop info_ptr)
{
pdf_obj *colorspace;
int csp_id, colortype;
png_byte color_type;
png_charp name;
int compression_type; /* Manual page for libpng does not
* clarify whether profile data is inflated by libpng.
*/
#if PNG_LIBPNG_VER_MINOR < 5
png_charp profile;
#else
png_bytep profile;
#endif
png_uint_32 proflen;
if (!png_get_valid(png_ptr, info_ptr, PNG_INFO_iCCP) ||
!png_get_iCCP(png_ptr, info_ptr, &name, &compression_type, &profile, &proflen))
return NULL;
color_type = png_get_color_type(png_ptr, info_ptr);
if (color_type & PNG_COLOR_MASK_COLOR) {
colortype = PDF_COLORSPACE_TYPE_RGB;
#if 0
alternate = create_cspace_CalRGB(png_ptr, info_ptr);
#endif
} else {
colortype = PDF_COLORSPACE_TYPE_GRAY;
#if 0
alternate = create_cspace_CalGray(png_ptr, info_ptr);
#endif
}
#if 0
if (alternate)
pdf_add_dict(dict, pdf_new_name("Alternate"), alternate);
#endif
if (iccp_check_colorspace(colortype, profile, proflen) < 0)
colorspace = NULL;
else {
csp_id = iccp_load_profile(name, profile, proflen);
if (csp_id < 0) {
colorspace = NULL;
} else {
colorspace = pdf_get_colorspace_reference(csp_id);
}
}
/* Rendering intent ... */
return colorspace;
}
int
jp2_include_image (pdf_ximage *ximage, FILE *fp)
{
int smask = 0;
pdf_obj *stream, *stream_dict;
ximage_info info;
if (pdf_check_version(1, 5) < 0) {
WARN("JPEG 2000 support requires PDF version >= 1.5.\n");
return -1;
}
pdf_ximage_init_image_info(&info);
stream = stream_dict = NULL;
rewind(fp);
if (scan_file(&info, &smask, fp) < 0) {
WARN("JPEG2000: Reading JPEG 2000 file failed.");
return -1;
}
stream = pdf_new_stream(0);
stream_dict = pdf_stream_dict(stream);
pdf_add_dict(stream_dict,
pdf_new_name("Filter"), pdf_new_name("JPXDecode"));
if (smask)
pdf_add_dict(stream_dict,
pdf_new_name("SMaskInData"), pdf_new_number(1));
/* Read whole file */
{
int nb_read;
rewind(fp);
while ((nb_read =
fread(work_buffer, sizeof(char), WORK_BUFFER_SIZE, fp)) > 0)
pdf_add_stream(stream, work_buffer, nb_read);
}
pdf_ximage_set_image(ximage, &info, stream);
return 0;
}
static pdf_obj *
create_soft_mask (png_structp png_ptr, png_infop info_ptr,
png_bytep image_data_ptr, png_uint_32 width, png_uint_32 height)
{
pdf_obj *smask, *dict;
png_bytep smask_data_ptr;
png_bytep trans;
int num_trans;
png_uint_32 i;
if (!png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS) ||
!png_get_tRNS(png_ptr, info_ptr, &trans, &num_trans, NULL)) {
WARN("%s: PNG does not have valid tRNS chunk but tRNS is requested.", PNG_DEBUG_STR);
return NULL;
}
smask = pdf_new_stream(STREAM_COMPRESS);
dict = pdf_stream_dict(smask);
smask_data_ptr = (png_bytep) NEW(width*height, png_byte);
pdf_add_dict(dict, pdf_new_name("Type"), pdf_new_name("XObject"));
pdf_add_dict(dict, pdf_new_name("Subtype"), pdf_new_name("Image"));
pdf_add_dict(dict, pdf_new_name("Width"), pdf_new_number(width));
pdf_add_dict(dict, pdf_new_name("Height"), pdf_new_number(height));
pdf_add_dict(dict, pdf_new_name("ColorSpace"), pdf_new_name("DeviceGray"));
pdf_add_dict(dict, pdf_new_name("BitsPerComponent"), pdf_new_number(8));
for (i = 0; i < width*height; i++) {
png_byte idx = image_data_ptr[i];
smask_data_ptr[i] = (idx < num_trans) ? trans[idx] : 0xff;
}
pdf_add_stream(smask, (char *)smask_data_ptr, width*height);
RELEASE(smask_data_ptr);
return smask;
}
pdf_obj *parse_pdf_dict (char **start, char *end)
{
pdf_obj *result, *tmp1, *tmp2;
char *save = *start;
skip_white(start, end);
if (*((*start)++) != '<' ||
*((*start)++) != '<') {
*start = save;
dump (*start, end);
return NULL;
}
result = pdf_new_dict ();
skip_white(start, end);
while (*start < end &&
**start != '>') {
if ((tmp1 = parse_pdf_name (start, end)) == NULL) {
pdf_release_obj (result);
{
*start = save;
dump (*start, end);
return NULL;
}
};
if ((tmp2 = parse_pdf_object (start, end)) == NULL) {
pdf_release_obj (result);
pdf_release_obj (tmp1);
{
*start = save;
dump (*start, end);
return NULL;
}
}
pdf_add_dict (result, tmp1, tmp2);
skip_white(start, end);
}
if (*start >= end) {
pdf_release_obj (result);
*start = save;
dump (*start, end);
return NULL;
}
if (*((*start)++) == '>' &&
*((*start)++) == '>') {
return result;
} else {
pdf_release_obj (result);
fprintf (stderr, "\nDictionary object ended prematurely\n");
*start = save;
dump (*start, end);
return NULL;
}
}
pdf_obj *
Type0Font_get_resource (Type0Font *font)
{
ASSERT(font);
/*
* This looks somewhat strange.
*/
if (!font->indirect) {
pdf_obj *array;
array = pdf_new_array();
pdf_add_array(array, CIDFont_get_resource(font->descendant));
pdf_add_dict(font->fontdict, pdf_new_name("DescendantFonts"), array);
font->indirect = pdf_ref_obj(font->fontdict);
}
return pdf_link_obj(font->indirect);
}
static void html_make_link_dict (char *name)
{
pdf_obj *color;
if (!link_dict) {
link_dict = pdf_new_dict();
pdf_add_dict(link_dict, pdf_new_name("Type"), pdf_new_name ("Annot"));
pdf_add_dict(link_dict, pdf_new_name("Subtype"), pdf_new_name ("Link"));
color = pdf_new_array ();
pdf_add_array (color, pdf_new_number (0));
pdf_add_array (color, pdf_new_number (1));
pdf_add_array (color, pdf_new_number (1));
pdf_add_dict(link_dict, pdf_new_name("C"), color);
if (name && *name == '#' && !(base_value)) {
pdf_add_dict (link_dict, pdf_new_name("Dest"), pdf_new_string(name+1,strlen(name+1)));
} else if (name) { /* Assume its a URL */
char *url;
int len;
pdf_obj *action;
len = strlen(name)+1;
if (base_value)
len+=strlen(base_value);
url = NEW (len, char);
if (base_value)
strcpy (url, base_value);
else
url[0] = 0;
strcat (url, name);
action = pdf_new_dict();
pdf_add_dict (action, pdf_new_name ("Type"), pdf_new_name ("Action"));
pdf_add_dict (action, pdf_new_name ("S"), pdf_new_name ("URI"));
pdf_add_dict (action, pdf_new_name ("URI"),
pdf_new_string (url, len));
pdf_add_dict (link_dict, pdf_new_name ("A"), pdf_ref_obj (action));
pdf_release_obj (action);
RELEASE (url);
}
pdf_doc_begin_annot (link_dict);
} else {
int
jp2_include_image (pdf_ximage *ximage, FILE *fp)
{
unsigned pdf_version;
pdf_obj *stream, *stream_dict;
ximage_info info;
pdf_version = pdf_get_version();
if (pdf_version < 5) {
WARN("JPEG 2000 support requires PDF version >= 1.5 (Current setting 1.%d)\n", pdf_version);
return -1;
}
pdf_ximage_init_image_info(&info);
stream = stream_dict = NULL;
rewind(fp);
if (scan_file(&info, fp) < 0) {
WARN("Reading JPEG 2000 file failed.");
return -1;
}
stream = pdf_new_stream(0);
stream_dict = pdf_stream_dict(stream);
pdf_add_dict(stream_dict,
pdf_new_name("Filter"), pdf_new_name("JPXDecode"));
/* Read whole file */
{
long nb_read;
rewind(fp);
while ((nb_read =
fread(work_buffer, sizeof(char), WORK_BUFFER_SIZE, fp)) > 0)
pdf_add_stream(stream, work_buffer, nb_read);
}
pdf_ximage_set_image(ximage, &info, stream);
return 0;
}
static pdf_obj *
make_param_Cal (png_byte color_type,
double G, /* Gamma */
double xw, double yw,
double xr, double yr, double xg, double yg, double xb, double yb)
{
pdf_obj *cal_param;
pdf_obj *white_point, *matrix, *dev_gamma;
double Xw, Yw, Zw; /* Yw = 1.0 */
double Xr, Xg, Xb, Yr, Yb, Yg, Zr, Zg, Zb;
#ifndef ABS
#define ABS(x) ((x) < 0 ? -(x) : (x))
#endif
/*
* TODO: Check validity
*
* Conversion found in
*
* com.sixlegs.image.png - Java package to read and display PNG images
* Copyright (C) 1998, 1999, 2001 Chris Nokleberg
*
* http://www.sixlegs.com/software/png/
*
*/
{
double zw, zr, zg, zb;
double fr, fg, fb;
double det;
/* WhitePoint */
zw = 1 - (xw + yw);
zr = 1 - (xr + yr); zg = 1 - (xg + yg); zb = 1 - (xb + yb);
Xw = xw / yw; Yw = 1.0; Zw = zw / yw;
/* Matrix */
det = xr * (yg * zb - zg * yb) - xg * (yr * zb - zr * yb) + xb * (yr * zg - zr * yg);
if (ABS(det) < 1.0e-10) {
WARN("Non invertible matrix: Maybe invalid value(s) specified in cHRM chunk.");
return NULL;
}
fr = (Xw * (yg * zb - zg * yb) - xg * (zb - Zw * yb) + xb * (zg - Zw * yg)) / det;
fg = (xr * (zb - Zw * yb) - Xw * (yr * zb - zr * yb) + xb * (yr * Zw - zr)) / det;
fb = (xr * (yg * Zw - zg) - xg * (yr * Zw - zr) + Xw * (yr * zg - zr * yg)) / det;
Xr = fr * xr; Yr = fr * yr; Zr = fr * zr;
Xg = fg * xg; Yg = fg * yg; Zg = fg * zg;
Xb = fb * xb; Yb = fb * yb; Zb = fb * zb;
}
if (G < 1.0e-2) {
WARN("Unusual Gamma specified: 1.0 / %g", G);
return NULL;
}
cal_param = pdf_new_dict();
/* White point is always required. */
white_point = pdf_new_array();
pdf_add_array(white_point, pdf_new_number(ROUND(Xw, 0.00001)));
pdf_add_array(white_point, pdf_new_number(ROUND(Yw, 0.00001)));
pdf_add_array(white_point, pdf_new_number(ROUND(Zw, 0.00001)));
pdf_add_dict(cal_param, pdf_new_name("WhitePoint"), white_point);
/* Matrix - default: Identity */
if (color_type & PNG_COLOR_MASK_COLOR) {
if (G != 1.0) {
dev_gamma = pdf_new_array();
pdf_add_array(dev_gamma, pdf_new_number(ROUND(G, 0.00001)));
pdf_add_array(dev_gamma, pdf_new_number(ROUND(G, 0.00001)));
pdf_add_array(dev_gamma, pdf_new_number(ROUND(G, 0.00001)));
pdf_add_dict(cal_param, pdf_new_name("Gamma"), dev_gamma);
}
matrix = pdf_new_array();
pdf_add_array(matrix, pdf_new_number(ROUND(Xr, 0.00001)));
pdf_add_array(matrix, pdf_new_number(ROUND(Yr, 0.00001)));
pdf_add_array(matrix, pdf_new_number(ROUND(Zr, 0.00001)));
pdf_add_array(matrix, pdf_new_number(ROUND(Xg, 0.00001)));
pdf_add_array(matrix, pdf_new_number(ROUND(Yg, 0.00001)));
pdf_add_array(matrix, pdf_new_number(ROUND(Zg, 0.00001)));
pdf_add_array(matrix, pdf_new_number(ROUND(Xb, 0.00001)));
pdf_add_array(matrix, pdf_new_number(ROUND(Yb, 0.00001)));
pdf_add_array(matrix, pdf_new_number(ROUND(Zb, 0.00001)));
pdf_add_dict (cal_param, pdf_new_name("Matrix"), matrix);
} else { /* Gray */
if (G != 1.0)
pdf_add_dict(cal_param,
pdf_new_name("Gamma"),
pdf_new_number(ROUND(G, 0.00001)));
}
return cal_param;
}
pdf_obj *start_png_image (FILE *file, char *res_name)
{
pdf_obj *result = NULL, *dict = NULL;
png_structp png_ptr;
png_infop info_ptr;
unsigned long width, height;
unsigned bit_depth, color_type;
rewind (file);
if (!(png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING,
NULL, NULL, NULL)) ||
!(info_ptr = png_create_info_struct (png_ptr))) {
fprintf (stderr, "\n\nLibpng failed to initialize\n");
if (png_ptr)
png_destroy_read_struct(&png_ptr, NULL, NULL);
return NULL;
}
png_init_io (png_ptr, file);
/* png_set_sig_bytes (png_ptr, 0); */
/* Read PNG header */
png_read_info (png_ptr, info_ptr);
{
png_color_16 default_background;
png_color_16p file_background;
default_background.red=255; default_background.green=255;
default_background.blue=255; default_background.gray=0;
default_background.index = 0;
width = png_get_image_width(png_ptr, info_ptr);
height = png_get_image_height(png_ptr, info_ptr);
color_type = png_get_color_type(png_ptr, info_ptr);
bit_depth = png_get_bit_depth(png_ptr, info_ptr);
/* Convert paletted images to true color */
if (color_type == PNG_COLOR_TYPE_PALETTE) {
png_set_expand(png_ptr);
}
/* Limit image component depth to 8 bits */
if (bit_depth == 16) {
png_set_strip_16 (png_ptr);
}
if (png_get_bKGD(png_ptr, info_ptr, &file_background)) {
png_set_background(png_ptr, file_background,
PNG_BACKGROUND_GAMMA_FILE, 1, 1.0);
} else {
png_set_background(png_ptr, &default_background,
PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0);
}
}
{ /* Read the image in raw RGB format */
int i, rowbytes, pdf_bit_depth;
png_bytep *rows;
png_read_update_info(png_ptr, info_ptr);
rows = NEW (height, png_bytep);
rowbytes = png_get_rowbytes(png_ptr, info_ptr);
rows[0] = NEW (rowbytes*height, png_byte);
for (i=1; i<height; i++) {
rows[i] = rows[0] + rowbytes * i;
}
png_read_image(png_ptr, rows);
result = pdf_new_stream(STREAM_COMPRESS);
dict = pdf_stream_dict(result);
pdf_add_dict (dict, pdf_new_name ("Width"),
pdf_new_number(width));
pdf_add_dict (dict, pdf_new_name ("Height"),
pdf_new_number(height));
if (color_type == PNG_COLOR_TYPE_GRAY) {
pdf_bit_depth = bit_depth;
} else {
pdf_bit_depth = 8;
}
pdf_add_dict (dict, pdf_new_name ("BitsPerComponent"),
pdf_new_number(pdf_bit_depth));
if (color_type == PNG_COLOR_TYPE_GRAY ||
color_type == PNG_COLOR_TYPE_GRAY_ALPHA) {
pdf_add_dict (dict, pdf_new_name ("ColorSpace"),
pdf_new_name ("DeviceGray"));
} else{
pdf_add_dict (dict, pdf_new_name ("ColorSpace"),
pdf_new_name ("DeviceRGB"));
}
pdf_add_stream (result, (char *)rows[0], rowbytes*height);
RELEASE (rows[0]);
RELEASE (rows);
}
{ /* Cleanup */
if (info_ptr)
png_destroy_info_struct(png_ptr, &info_ptr);
if (png_ptr)
png_destroy_read_struct(&png_ptr, NULL, NULL);
}
return result;
}
static void
add_ToUnicode (Type0Font *font)
{
pdf_obj *tounicode;
CIDFont *cidfont;
CIDSysInfo *csi;
char *fontname;
/*
* ToUnicode CMap:
*
* ToUnicode CMaps are usually not required for standard character
* collections such as Adobe-Japan1. Identity-H is used for UCS
* ordering CID-keyed fonts. External resource must be loaded for
* others.
*/
cidfont = font->descendant;
if (!cidfont) {
ERROR("%s: No descendant CID-keyed font.", TYPE0FONT_DEBUG_STR);
return;
}
if (CIDFont_is_ACCFont(cidfont)) {
/* No need to embed ToUnicode */
return;
} else if (CIDFont_is_UCSFont(cidfont)) {
/*
* Old version of dvipdfmx mistakenly used Adobe-Identity as Unicode.
*/
tounicode = pdf_read_ToUnicode_file("Adobe-Identity-UCS2");
if (!tounicode) { /* This should work */
tounicode = pdf_new_name("Identity-H");
}
pdf_add_dict(font->fontdict, pdf_new_name("ToUnicode"), tounicode);
return;
}
tounicode = NULL;
csi = CIDFont_get_CIDSysInfo(cidfont);
fontname = CIDFont_get_fontname(cidfont);
if (CIDFont_get_embedding(cidfont)) {
fontname += 7; /* FIXME */
}
if (!strcmp(csi->registry, "Adobe") &&
!strcmp(csi->ordering, "Identity")) {
switch (CIDFont_get_subtype(cidfont)) {
case CIDFONT_TYPE2:
/* PLEASE FIX THIS */
tounicode = Type0Font_create_ToUnicode_stream(font);
break;
default:
if (CIDFont_get_flag(cidfont, CIDFONT_FLAG_TYPE1C)) { /* FIXME */
tounicode = Type0Font_create_ToUnicode_stream(font);
} else if (CIDFont_get_flag(cidfont, CIDFONT_FLAG_TYPE1)) { /* FIXME */
/* Font loader will create ToUnicode and set. */
return;
} else {
tounicode = Type0Font_try_load_ToUnicode_stream(font, fontname);
}
break;
}
} else {
char *cmap_base = NEW(strlen(csi->registry) + strlen(csi->ordering) + 2, char);
sprintf(cmap_base, "%s-%s", csi->registry, csi->ordering);
tounicode = Type0Font_try_load_ToUnicode_stream(font, cmap_base);
RELEASE(cmap_base);
}
if (tounicode) {
pdf_add_dict(font->fontdict,
pdf_new_name("ToUnicode"), tounicode);
} else {
WARN("Failed to load ToUnicode CMap for font \"%s\"", fontname);
}
return;
}
/* ximage here is the result. DONT USE IT FOR PASSING OPTIONS! */
int
pdf_include_page (pdf_ximage *ximage,
FILE *image_file,
const char *ident,
load_options options)
{
pdf_file *pf;
xform_info info;
pdf_obj *contents = NULL, *catalog;
pdf_obj *page = NULL, *resources = NULL, *markinfo = NULL;
pf = pdf_open(ident, image_file);
if (!pf)
return -1;
if (pdf_file_get_version(pf) > pdf_get_version()) {
WARN("Trying to include PDF file which has newer version number " \
"than output PDF: 1.%d.", pdf_get_version());
}
pdf_ximage_init_form_info(&info);
if (options.page_no == 0)
options.page_no = 1;
page = pdf_doc_get_page(pf,
options.page_no, options.bbox_type,
&info.bbox, &resources);
if(!page)
goto error_silent;
catalog = pdf_file_get_catalog(pf);
markinfo = pdf_deref_obj(pdf_lookup_dict(catalog, "MarkInfo"));
if (markinfo) {
pdf_obj *tmp = pdf_deref_obj(pdf_lookup_dict(markinfo, "Marked"));
pdf_release_obj(markinfo);
if (!PDF_OBJ_BOOLEANTYPE(tmp)) {
if (tmp)
pdf_release_obj(tmp);
goto error;
} else if (pdf_boolean_value(tmp)) {
WARN("PDF file is tagged... Ignoring tags.");
}
pdf_release_obj(tmp);
}
contents = pdf_deref_obj(pdf_lookup_dict(page, "Contents"));
pdf_release_obj(page);
page = NULL;
/*
* Handle page content stream.
*/
{
pdf_obj *content_new;
if (!contents) {
/*
* Empty page
*/
content_new = pdf_new_stream(0);
/* TODO: better don't include anything if the page is empty */
} else if (PDF_OBJ_STREAMTYPE(contents)) {
/*
* We must import the stream because its dictionary
* may contain indirect references.
*/
content_new = pdf_import_object(contents);
} else if (PDF_OBJ_ARRAYTYPE(contents)) {
/*
* Concatenate all content streams.
*/
int idx, len = pdf_array_length(contents);
content_new = pdf_new_stream(STREAM_COMPRESS);
for (idx = 0; idx < len; idx++) {
pdf_obj *content_seg = pdf_deref_obj(pdf_get_array(contents, idx));
if (!PDF_OBJ_STREAMTYPE(content_seg) ||
pdf_concat_stream(content_new, content_seg) < 0) {
pdf_release_obj(content_seg);
pdf_release_obj(content_new);
goto error;
}
pdf_release_obj(content_seg);
}
} else {
goto error;
}
if (contents)
pdf_release_obj(contents);
contents = content_new;
}
/*
* Add entries to contents stream dictionary.
*/
{
pdf_obj *contents_dict, *bbox, *matrix;
contents_dict = pdf_stream_dict(contents);
pdf_add_dict(contents_dict,
pdf_new_name("Type"), pdf_new_name("XObject"));
pdf_add_dict(contents_dict,
pdf_new_name("Subtype"), pdf_new_name("Form"));
pdf_add_dict(contents_dict,
pdf_new_name("FormType"), pdf_new_number(1.0));
bbox = pdf_new_array();
pdf_add_array(bbox, pdf_new_number(info.bbox.llx));
pdf_add_array(bbox, pdf_new_number(info.bbox.lly));
pdf_add_array(bbox, pdf_new_number(info.bbox.urx));
pdf_add_array(bbox, pdf_new_number(info.bbox.ury));
pdf_add_dict(contents_dict, pdf_new_name("BBox"), bbox);
matrix = pdf_new_array();
pdf_add_array(matrix, pdf_new_number(1.0));
pdf_add_array(matrix, pdf_new_number(0.0));
pdf_add_array(matrix, pdf_new_number(0.0));
pdf_add_array(matrix, pdf_new_number(1.0));
pdf_add_array(matrix, pdf_new_number(0.0));
pdf_add_array(matrix, pdf_new_number(0.0));
pdf_add_dict(contents_dict, pdf_new_name("Matrix"), matrix);
pdf_add_dict(contents_dict, pdf_new_name("Resources"),
pdf_import_object(resources));
pdf_release_obj(resources);
}
pdf_close(pf);
pdf_ximage_set_form(ximage, &info, contents);
return 0;
error:
WARN("Cannot parse document. Broken PDF file?");
error_silent:
if (resources)
pdf_release_obj(resources);
if (markinfo)
pdf_release_obj(markinfo);
if (page)
pdf_release_obj(page);
if (contents)
pdf_release_obj(contents);
pdf_close(pf);
return -1;
}
int
pdf_font_load_pkfont (pdf_font *font)
{
pdf_obj *fontdict;
char *usedchars;
char *ident;
unsigned dpi;
FILE *fp;
double point_size, pix2charu;
int opcode, code, firstchar, lastchar, prev;
pdf_obj *charprocs, *procset, *encoding, *tmp_array;
double widths[256];
pdf_rect bbox;
char charavail[256];
#if ENABLE_GLYPHENC
int encoding_id;
char **enc_vec;
#endif /* ENABLE_GLYPHENC */
int error = 0;
if (!pdf_font_is_in_use(font)) {
return 0;
}
ident = pdf_font_get_ident(font);
point_size = pdf_font_get_param(font, PDF_FONT_PARAM_POINT_SIZE);
usedchars = pdf_font_get_usedchars(font);
#if ENABLE_GLYPHENC
encoding_id = pdf_font_get_encoding(font);
if (encoding_id < 0)
enc_vec = NULL;
else {
enc_vec = pdf_encoding_get_encoding(encoding_id);
}
#endif /* ENABLE_GLYPHENC */
ASSERT(ident && usedchars && point_size > 0.0);
dpi = truedpi(ident, point_size, base_dpi);
{
char *fontfile = pdf_font_get_fontfile (font);
if (fontfile)
fp = MFOPEN(fontfile, FOPEN_RBIN_MODE);
else
fp = dpx_open_pk_font_at(ident, dpi);
}
if (!fp) {
ERROR("Could not find/open PK font file: %s (at %udpi)", ident, dpi);
}
memset(charavail, 0, 256);
charprocs = pdf_new_dict();
/* Include bitmap as 72dpi image:
* There seems to be problems in "scaled" bitmap glyph
* rendering in several viewers.
*/
pix2charu = 72. * 1000. / ((double) base_dpi) / point_size;
bbox.llx = bbox.lly = HUGE_VAL;
bbox.urx = bbox.ury = -HUGE_VAL;
while ((opcode = fgetc(fp)) >= 0 && opcode != PK_POST) {
if (opcode < 240) {
struct pk_header_ pkh;
error = read_pk_char_header(&pkh, opcode, fp);
if (error)
ERROR("Error in reading PK character header.");
else if (charavail[pkh.chrcode & 0xff])
WARN("More than two bitmap image for single glyph?: font=\"%s\" code=0x%02x",
ident, pkh.chrcode);
if (!usedchars[pkh.chrcode & 0xff])
do_skip(fp, pkh.pkt_len);
else {
char *charname;
pdf_obj *charproc;
unsigned char *pkt_ptr;
size_t bytesread;
double charwidth;
/* Charwidth in PDF units */
charwidth = ROUND(1000.0 * pkh.wd / (((double) (1<<20))*pix2charu), 0.1);
widths[pkh.chrcode & 0xff] = charwidth;
/* Update font BBox info */
bbox.llx = MIN(bbox.llx, -pkh.bm_hoff);
bbox.lly = MIN(bbox.lly, pkh.bm_voff - pkh.bm_ht);
bbox.urx = MAX(bbox.urx, pkh.bm_wd - pkh.bm_hoff);
bbox.ury = MAX(bbox.ury, pkh.bm_voff);
pkt_ptr = NEW(pkh.pkt_len, unsigned char);
if ((bytesread = fread(pkt_ptr, 1, pkh.pkt_len, fp))!= pkh.pkt_len) {
ERROR("Only %ld bytes PK packet read. (expected %ld bytes)",
bytesread, pkh.pkt_len);
}
charproc = create_pk_CharProc_stream(&pkh, charwidth, pkt_ptr, bytesread);
RELEASE(pkt_ptr);
if (!charproc)
ERROR("Unpacking PK character data failed.");
#if ENABLE_GLYPHENC
if (encoding_id >= 0 && enc_vec) {
charname = (char *) enc_vec[pkh.chrcode & 0xff];
if (!charname) {
WARN("\".notdef\" glyph used in font (code=0x%02x): %s", pkh.chrcode, ident);
charname = work_buffer;
pk_char2name(charname, pkh.chrcode);
}
}
else
#endif /* ENABLE_GLYPHENC */
{
charname = work_buffer;
pk_char2name(charname, pkh.chrcode);
}
pdf_add_dict(charprocs, pdf_new_name(charname), pdf_ref_obj(charproc)); /* _FIXME_ */
pdf_release_obj(charproc);
}
charavail[pkh.chrcode & 0xff] = 1;
} else { /* A command byte */
switch (opcode) {
case PK_NO_OP: break;
case PK_XXX1: do_skip(fp, get_unsigned_byte(fp)); break;
case PK_XXX2: do_skip(fp, get_unsigned_pair(fp)); break;
case PK_XXX3: do_skip(fp, get_unsigned_triple(fp)); break;
case PK_XXX4: do_skip(fp, get_unsigned_quad(fp)); break;
case PK_YYY: do_skip(fp, 4); break;
case PK_PRE: do_preamble(fp); break;
}
}
}
static int
CIDFont_base_open (CIDFont *font, const char *name, CIDSysInfo *cmap_csi, cid_opt *opt)
{
pdf_obj *fontdict, *descriptor;
char *fontname = NULL;
int idx;
ASSERT(font);
for (idx = 0; cid_basefont[idx].fontname != NULL; idx++) {
if (!strcmp(name, cid_basefont[idx].fontname) ||
(strlen(name) == strlen(cid_basefont[idx].fontname) - strlen("-Acro") &&
!strncmp(name, cid_basefont[idx].fontname,
strlen(cid_basefont[idx].fontname)-strlen("-Acro")))
)
break;
}
if (cid_basefont[idx].fontname == NULL)
return -1;
fontname = NEW(strlen(name)+12, char);
memset(fontname, 0, strlen(name)+12);
strcpy(fontname, name);
switch (opt->style) {
case FONT_STYLE_BOLD:
strcat(fontname, ",Bold");
break;
case FONT_STYLE_ITALIC:
strcat(fontname, ",Italic");
break;
case FONT_STYLE_BOLDITALIC:
strcat(fontname, ",BoldItalic");
break;
}
{
const char *start;
const char *end;
start = cid_basefont[idx].fontdict;
end = start + strlen(start);
fontdict = parse_pdf_dict(&start, end, NULL);
start = cid_basefont[idx].descriptor;
end = start + strlen(start);
descriptor = parse_pdf_dict(&start, end, NULL);
ASSERT(fontdict && descriptor);
}
font->fontname = fontname;
font->flags |= FONT_FLAG_BASEFONT;
{
char *registry, *ordering;
int supplement;
pdf_obj *tmp;
tmp = pdf_lookup_dict(fontdict, "CIDSystemInfo");
ASSERT( tmp && pdf_obj_typeof(tmp) == PDF_DICT );
registry = pdf_string_value(pdf_lookup_dict(tmp, "Registry"));
ordering = pdf_string_value(pdf_lookup_dict(tmp, "Ordering"));
supplement = pdf_number_value(pdf_lookup_dict(tmp, "Supplement"));
if (cmap_csi) { /* NULL for accept any */
if (strcmp(registry, cmap_csi->registry) ||
strcmp(ordering, cmap_csi->ordering))
ERROR("Inconsistent CMap used for CID-keyed font %s.",
cid_basefont[idx].fontname);
else if (supplement < cmap_csi->supplement) {
WARN("CMap has higher supplement number than CIDFont: %s", fontname);
WARN("Some chracters may not be displayed or printed.");
}
}
font->csi = NEW(1, CIDSysInfo);
font->csi->registry = NEW(strlen(registry)+1, char);
font->csi->ordering = NEW(strlen(ordering)+1, char);
strcpy(font->csi->registry, registry);
strcpy(font->csi->ordering, ordering);
font->csi->supplement = supplement;
}
{
pdf_obj *tmp;
char *type;
tmp = pdf_lookup_dict(fontdict, "Subtype");
ASSERT( tmp != NULL && pdf_obj_typeof(tmp) == PDF_NAME );
type = pdf_name_value(tmp);
if (!strcmp(type, "CIDFontType0"))
font->subtype = CIDFONT_TYPE0;
else if (!strcmp(type, "CIDFontType2"))
font->subtype = CIDFONT_TYPE2;
else {
ERROR("Unknown CIDFontType \"%s\"", type);
}
}
if (cidoptflags & CIDFONT_FORCE_FIXEDPITCH) {
if (pdf_lookup_dict(fontdict, "W")) {
pdf_remove_dict(fontdict, "W");
}
if (pdf_lookup_dict(fontdict, "W2")) {
pdf_remove_dict(fontdict, "W2");
}
}
pdf_add_dict(fontdict, pdf_new_name("Type"), pdf_new_name("Font"));
pdf_add_dict(fontdict, pdf_new_name("BaseFont"), pdf_new_name(fontname));
pdf_add_dict(descriptor, pdf_new_name("Type"), pdf_new_name("FontDescriptor"));
pdf_add_dict(descriptor, pdf_new_name("FontName"), pdf_new_name(fontname));
font->fontdict = fontdict;
font->descriptor = descriptor;
opt->embed = 0;
return 0;
}
/* bitdepth is always 8 (16 is not supported) */
static pdf_obj *
strip_soft_mask (png_structp png_ptr, png_infop info_ptr,
/* next two values will be modified. */
png_bytep image_data_ptr, png_uint_32p rowbytes_ptr,
png_uint_32 width, png_uint_32 height)
{
pdf_obj *smask, *dict;
png_byte color_type, bpc;
png_bytep smask_data_ptr;
png_uint_32 i;
color_type = png_get_color_type(png_ptr, info_ptr);
bpc = png_get_bit_depth (png_ptr, info_ptr);
if (color_type & PNG_COLOR_MASK_COLOR) {
int bps = (bpc == 8) ? 4 : 8;
if (*rowbytes_ptr != bps*width*sizeof(png_byte)) { /* Something wrong */
WARN("%s: Inconsistent rowbytes value.", PNG_DEBUG_STR);
return NULL;
}
} else {
int bps = (bpc == 8) ? 2 : 4;
if (*rowbytes_ptr != bps*width*sizeof(png_byte)) { /* Something wrong */
WARN("%s: Inconsistent rowbytes value.", PNG_DEBUG_STR);
return NULL;
}
}
smask = pdf_new_stream(STREAM_COMPRESS);
dict = pdf_stream_dict(smask);
pdf_add_dict(dict, pdf_new_name("Type"), pdf_new_name("XObject"));
pdf_add_dict(dict, pdf_new_name("Subtype"), pdf_new_name("Image"));
pdf_add_dict(dict, pdf_new_name("Width"), pdf_new_number(width));
pdf_add_dict(dict, pdf_new_name("Height"), pdf_new_number(height));
pdf_add_dict(dict, pdf_new_name("ColorSpace"), pdf_new_name("DeviceGray"));
pdf_add_dict(dict, pdf_new_name("BitsPerComponent"), pdf_new_number(bpc));
smask_data_ptr = (png_bytep) NEW((bpc/8)*width*height, png_byte);
switch (color_type) {
case PNG_COLOR_TYPE_RGB_ALPHA:
if (bpc == 8) {
for (i = 0; i < width*height; i++) {
memmove(image_data_ptr+(3*i), image_data_ptr+(4*i), 3);
smask_data_ptr[i] = image_data_ptr[4*i+3];
}
*rowbytes_ptr = 3*width*sizeof(png_byte);
} else {
for (i = 0; i < width*height; i++) {
memmove(image_data_ptr+(6*i), image_data_ptr+(8*i), 6);
smask_data_ptr[2*i] = image_data_ptr[8*i+6];
smask_data_ptr[2*i+1] = image_data_ptr[8*i+7];
}
*rowbytes_ptr = 6*width*sizeof(png_byte);
}
break;
case PNG_COLOR_TYPE_GRAY_ALPHA:
if (bpc == 8) {
for (i = 0; i < width*height; i++) {
image_data_ptr[i] = image_data_ptr[2*i];
smask_data_ptr[i] = image_data_ptr[2*i+1];
}
*rowbytes_ptr = width*sizeof(png_byte);
} else {
for (i = 0; i < width*height; i++) {
image_data_ptr[2*i] = image_data_ptr[4*i];
image_data_ptr[2*i+1] = image_data_ptr[4*i+1];
smask_data_ptr[2*i] = image_data_ptr[4*i+2];
smask_data_ptr[2*i+1] = image_data_ptr[4*i+3];
}
*rowbytes_ptr = 2*width*sizeof(png_byte);
}
break;
default:
WARN("You found a bug in pngimage.c!");
pdf_release_obj(smask);
RELEASE(smask_data_ptr);
return NULL;
}
pdf_add_stream(smask, smask_data_ptr, (bpc/8)*width*height);
RELEASE(smask_data_ptr);
return smask;
}
pdf_obj *
CMap_create_stream (CMap *cmap)
{
pdf_obj *stream;
pdf_obj *stream_dict;
CIDSysInfo *csi;
struct sbuf wbuf;
struct rangeDef *ranges;
unsigned char *codestr;
int i, j, count = 0;
if (!cmap || !CMap_is_valid(cmap)) {
WARN("Invalid CMap");
return NULL;
}
if (cmap->type == CMAP_TYPE_IDENTITY)
return NULL;
stream = pdf_new_stream(STREAM_COMPRESS);
stream_dict = pdf_stream_dict(stream);
csi = CMap_get_CIDSysInfo(cmap);
if (!csi) {
csi = (cmap->type != CMAP_TYPE_TO_UNICODE) ?
&CSI_IDENTITY : &CSI_UNICODE;
}
if (cmap->type != CMAP_TYPE_TO_UNICODE) {
pdf_obj *csi_dict;
csi_dict = pdf_new_dict();
pdf_add_dict(csi_dict,
pdf_new_name("Registry"),
pdf_new_string(csi->registry, strlen(csi->registry)));
pdf_add_dict(csi_dict,
pdf_new_name("Ordering"),
pdf_new_string(csi->ordering, strlen(csi->ordering)));
pdf_add_dict(csi_dict,
pdf_new_name("Supplement"),
pdf_new_number(csi->supplement));
pdf_add_dict(stream_dict,
pdf_new_name("Type"),
pdf_new_name("CMap"));
pdf_add_dict(stream_dict,
pdf_new_name("CMapName"),
pdf_new_name(cmap->name));
pdf_add_dict(stream_dict,
pdf_new_name("CIDSystemInfo"), csi_dict);
if (cmap->wmode != 0)
pdf_add_dict(stream_dict,
pdf_new_name("WMode"),
pdf_new_number(cmap->wmode));
}
/* TODO:
* Predefined CMaps need not to be embedded.
*/
if (cmap->useCMap) {
ERROR("UseCMap found (not supported yet)...");
if (CMap_is_Identity(cmap->useCMap)) { /* not sure */
if (CMap_get_wmode(cmap) == 1) {
pdf_add_dict(stream_dict,
pdf_new_name("UseCMap"),
pdf_new_name("Identity-V"));
} else {
pdf_add_dict(stream_dict,
pdf_new_name("UseCMap"),
pdf_new_name("Identity-H"));
}
} else {
int res_id;
pdf_obj *ucmap_ref;
res_id = pdf_findresource("CMap", CMap_get_name(cmap->useCMap));
if (res_id >= 0) {
ucmap_ref = pdf_get_resource_reference(res_id);
} else {
pdf_obj *ucmap_obj;
ucmap_obj = CMap_create_stream(cmap->useCMap);
if (!ucmap_obj) {
ERROR("Uh ah. I cannot continue...");
}
res_id = pdf_defineresource("CMap",
CMap_get_name(cmap->useCMap),
ucmap_obj, PDF_RES_FLUSH_IMMEDIATE);
ucmap_ref = pdf_get_resource_reference(res_id);
}
pdf_add_dict(stream_dict, pdf_new_name("UseCMap"), ucmap_ref);
}
}
#define WBUF_SIZE 40960
wbuf.buf = NEW(WBUF_SIZE, char);
codestr = NEW(cmap->profile.maxBytesIn, unsigned char);
memset(codestr, 0, cmap->profile.maxBytesIn);
wbuf.curptr = wbuf.buf;
wbuf.limptr = wbuf.buf + WBUF_SIZE -
2 * (cmap->profile.maxBytesIn + cmap->profile.maxBytesOut) + 16;
/* Start CMap */
pdf_add_stream(stream, (const void *) CMAP_BEGIN, strlen(CMAP_BEGIN));
wbuf.curptr += sprintf(wbuf.curptr, "/CMapName ");
write_name(&wbuf.curptr, wbuf.limptr, cmap->name);
wbuf.curptr += sprintf(wbuf.curptr, " def\n");
wbuf.curptr += sprintf(wbuf.curptr, "/CMapType %d def\n" , cmap->type);
if (cmap->wmode != 0 &&
cmap->type != CMAP_TYPE_TO_UNICODE)
wbuf.curptr += sprintf(wbuf.curptr, "/WMode %d def\n", cmap->wmode);
#define CMAP_CSI_FMT "/CIDSystemInfo <<\n\
/Registry (%s)\n\
/Ordering (%s)\n\
/Supplement %d\n\
>> def\n"
wbuf.curptr += sprintf(wbuf.curptr, "/CIDSystemInfo <<\n");
wbuf.curptr += sprintf(wbuf.curptr, " /Registry ");
write_string(&wbuf.curptr, wbuf.limptr, csi->registry);
wbuf.curptr += sprintf(wbuf.curptr, "\n");
wbuf.curptr += sprintf(wbuf.curptr, " /Ordering ");
write_string(&wbuf.curptr, wbuf.limptr, csi->ordering);
wbuf.curptr += sprintf(wbuf.curptr, "\n");
wbuf.curptr += sprintf(wbuf.curptr, " /Supplement %d\n>> def\n",
csi->supplement);
pdf_add_stream(stream, wbuf.buf, (int)(wbuf.curptr - wbuf.buf));
wbuf.curptr = wbuf.buf;
/* codespacerange */
ranges = cmap->codespace.ranges;
wbuf.curptr += sprintf(wbuf.curptr,
"%d begincodespacerange\n", cmap->codespace.num);
for (i = 0; i < cmap->codespace.num; i++) {
*(wbuf.curptr)++ = '<';
for (j = 0; j < ranges[i].dim; j++) {
sputx(ranges[i].codeLo[j], &(wbuf.curptr), wbuf.limptr);
}
*(wbuf.curptr)++ = '>';
*(wbuf.curptr)++ = ' ';
*(wbuf.curptr)++ = '<';
for (j = 0; j < ranges[i].dim; j++) {
sputx(ranges[i].codeHi[j], &(wbuf.curptr), wbuf.limptr);
}
*(wbuf.curptr)++ = '>';
*(wbuf.curptr)++ = '\n';
}
pdf_add_stream(stream, wbuf.buf, (int)(wbuf.curptr - wbuf.buf));
wbuf.curptr = wbuf.buf;
pdf_add_stream(stream,
"endcodespacerange\n", strlen("endcodespacerange\n"));
/* CMap body */
if (cmap->mapTbl) {
count = write_map(cmap->mapTbl,
0, codestr, 0, &wbuf, stream); /* Top node */
if (count > 0) { /* Flush */
char fmt_buf[32];
if (count > 100)
ERROR("Unexpected error....: %d", count);
sprintf(fmt_buf, "%d beginbfchar\n", count);
pdf_add_stream(stream, fmt_buf, strlen(fmt_buf));
pdf_add_stream(stream,
wbuf.buf, (int) (wbuf.curptr - wbuf.buf));
pdf_add_stream(stream,
"endbfchar\n", strlen("endbfchar\n"));
count = 0;
wbuf.curptr = wbuf.buf;
}
}
/* End CMap */
pdf_add_stream(stream, CMAP_END, strlen(CMAP_END));
RELEASE(codestr);
RELEASE(wbuf.buf);
return stream;
}
int
jpeg_include_image (pdf_ximage *ximage, FILE *fp)
{
pdf_obj *stream;
pdf_obj *stream_dict;
pdf_obj *colorspace;
int colortype;
ximage_info info;
struct JPEG_info j_info;
if (!check_for_jpeg(fp)) {
WARN("%s: Not a JPEG file?", JPEG_DEBUG_STR);
rewind(fp);
return -1;
}
/* File position is 2 here... */
pdf_ximage_init_image_info(&info);
JPEG_info_init(&j_info);
if (JPEG_scan_file(&j_info, fp) < 0) {
WARN("%s: Not a JPEG file?", JPEG_DEBUG_STR);
JPEG_info_clear(&j_info);
return -1;
}
switch (j_info.num_components) {
case 1:
colortype = PDF_COLORSPACE_TYPE_GRAY;
break;
case 3:
colortype = PDF_COLORSPACE_TYPE_RGB;
break;
case 4:
colortype = PDF_COLORSPACE_TYPE_CMYK;
break;
default:
WARN("%s: Unknown color space (num components: %d)",
JPEG_DEBUG_STR, info.num_components);
JPEG_info_clear(&j_info);
return -1;
}
/* JPEG image use DCTDecode. */
stream = pdf_new_stream (0);
stream_dict = pdf_stream_dict(stream);
pdf_add_dict(stream_dict,
pdf_new_name("Filter"), pdf_new_name("DCTDecode"));
colorspace = NULL;
if (j_info.flags & HAVE_APPn_ICC) {
pdf_obj *icc_stream, *intent;
icc_stream = JPEG_get_iccp(&j_info);
if (!icc_stream)
colorspace = NULL;
else {
int cspc_id;
if (iccp_check_colorspace(colortype,
pdf_stream_dataptr(icc_stream),
pdf_stream_length (icc_stream)) < 0)
colorspace = NULL;
else {
cspc_id = iccp_load_profile(NULL, /* noname */
pdf_stream_dataptr(icc_stream),
pdf_stream_length (icc_stream));
if (cspc_id < 0)
colorspace = NULL;
else {
colorspace = pdf_get_colorspace_reference(cspc_id);
intent = iccp_get_rendering_intent(pdf_stream_dataptr(icc_stream),
pdf_stream_length (icc_stream));
if (intent)
pdf_add_dict(stream_dict, pdf_new_name("Intent"), intent);
}
}
pdf_release_obj(icc_stream);
}
}
/* No ICC or invalid ICC profile. */
if (!colorspace) {
switch (colortype) {
case PDF_COLORSPACE_TYPE_GRAY:
colorspace = pdf_new_name("DeviceGray");
break;
case PDF_COLORSPACE_TYPE_RGB:
colorspace = pdf_new_name("DeviceRGB");
break;
case PDF_COLORSPACE_TYPE_CMYK:
colorspace = pdf_new_name("DeviceCMYK");
break;
}
}
pdf_add_dict(stream_dict, pdf_new_name("ColorSpace"), colorspace);
#define IS_ADOBE_CMYK(j) (((j).flags & HAVE_APPn_ADOBE) && (j).num_components == 4)
if (IS_ADOBE_CMYK(j_info)) {
pdf_obj *decode;
int i;
WARN("Adobe CMYK JPEG: Inverted color assumed.");
decode = pdf_new_array();
for (i = 0; i < j_info.num_components; i++) {
pdf_add_array(decode, pdf_new_number(1.0));
pdf_add_array(decode, pdf_new_number(0.0));
}
pdf_add_dict(stream_dict, pdf_new_name("Decode"), decode);
}
/* Copy file */
JPEG_copy_stream(&j_info, stream, fp);
info.width = j_info.width;
info.height = j_info.height;
info.bits_per_component = j_info.bits_per_component;
info.num_components = j_info.num_components;
jpeg_get_density(&j_info, &info.xdensity, &info.ydensity);
pdf_ximage_set_image(ximage, &info, stream);
JPEG_info_clear(&j_info);
return 0;
}
int
png_include_image (pdf_ximage *ximage, FILE *png_file)
{
pdf_obj *stream;
pdf_obj *stream_dict;
pdf_obj *colorspace, *mask, *intent;
png_bytep stream_data_ptr;
int trans_type;
ximage_info info;
/* Libpng stuff */
png_structp png_ptr;
png_infop png_info_ptr;
png_byte bpc, color_type;
png_uint_32 width, height, rowbytes;
pdf_ximage_init_image_info(&info);
stream = NULL;
stream_dict = NULL;
colorspace = mask = intent = NULL;
rewind (png_file);
png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, warn);
if (png_ptr == NULL ||
(png_info_ptr = png_create_info_struct (png_ptr)) == NULL) {
WARN("%s: Creating Libpng read/info struct failed.", PNG_DEBUG_STR);
if (png_ptr)
png_destroy_read_struct(&png_ptr, NULL, NULL);
return -1;
}
#if PNG_LIBPNG_VER >= 10603
/* ignore possibly incorrect CMF bytes */
png_set_option(png_ptr, PNG_MAXIMUM_INFLATE_WINDOW, PNG_OPTION_ON);
#endif
/* Inititializing file IO. */
png_init_io (png_ptr, png_file);
/* Read PNG info-header and get some info. */
png_read_info(png_ptr, png_info_ptr);
color_type = png_get_color_type (png_ptr, png_info_ptr);
width = png_get_image_width (png_ptr, png_info_ptr);
height = png_get_image_height(png_ptr, png_info_ptr);
bpc = png_get_bit_depth (png_ptr, png_info_ptr);
/* Ask libpng to convert down to 8-bpc. */
if (bpc > 8) {
if (pdf_get_version() < 5) {
WARN("%s: 16-bpc PNG requires PDF version 1.5.", PNG_DEBUG_STR);
png_set_strip_16(png_ptr);
bpc = 8;
}
}
/* Ask libpng to gamma-correct.
* It is wrong to assume screen gamma value 2.2 but...
* We do gamma correction here only when uncalibrated color space is used.
*/
if (!png_get_valid(png_ptr, png_info_ptr, PNG_INFO_iCCP) &&
!png_get_valid(png_ptr, png_info_ptr, PNG_INFO_sRGB) &&
!png_get_valid(png_ptr, png_info_ptr, PNG_INFO_cHRM) &&
png_get_valid(png_ptr, png_info_ptr, PNG_INFO_gAMA)) {
double G = 1.0;
png_get_gAMA (png_ptr, png_info_ptr, &G);
png_set_gamma(png_ptr, 2.2, G);
}
trans_type = check_transparency(png_ptr, png_info_ptr);
/* check_transparency() does not do updata_info() */
png_read_update_info(png_ptr, png_info_ptr);
rowbytes = png_get_rowbytes(png_ptr, png_info_ptr);
/* Values listed below will not be modified in the remaining process. */
info.width = width;
info.height = height;
info.bits_per_component = bpc;
if (compat_mode)
info.xdensity = info.ydensity = 72.0 / 100.0;
else
{
png_uint_32 xppm = png_get_x_pixels_per_meter(png_ptr, png_info_ptr);
png_uint_32 yppm = png_get_y_pixels_per_meter(png_ptr, png_info_ptr);
if (xppm > 0)
info.xdensity = 72.0 / 0.0254 / xppm;
if (yppm > 0)
info.ydensity = 72.0 / 0.0254 / yppm;
}
stream = pdf_new_stream (STREAM_COMPRESS);
stream_dict = pdf_stream_dict(stream);
stream_data_ptr = (png_bytep) NEW(rowbytes*height, png_byte);
read_image_data(png_ptr, stream_data_ptr, height, rowbytes);
/* Non-NULL intent means there is valid sRGB chunk. */
intent = get_rendering_intent(png_ptr, png_info_ptr);
if (intent)
pdf_add_dict(stream_dict, pdf_new_name("Intent"), intent);
switch (color_type) {
case PNG_COLOR_TYPE_PALETTE:
colorspace = create_cspace_Indexed(png_ptr, png_info_ptr);
switch (trans_type) {
case PDF_TRANS_TYPE_BINARY:
/* Color-key masking */
mask = create_ckey_mask(png_ptr, png_info_ptr);
break;
case PDF_TRANS_TYPE_ALPHA:
/* Soft mask */
mask = create_soft_mask(png_ptr, png_info_ptr, stream_data_ptr, width, height);
break;
default:
/* Nothing to be done here.
* No tRNS chunk or image already composited with background color.
*/
break;
}
info.num_components = 1;
break;
case PNG_COLOR_TYPE_RGB:
case PNG_COLOR_TYPE_RGB_ALPHA:
if (png_get_valid(png_ptr, png_info_ptr, PNG_INFO_iCCP))
colorspace = create_cspace_ICCBased(png_ptr, png_info_ptr);
else if (intent) {
colorspace = create_cspace_sRGB(png_ptr, png_info_ptr);
} else {
colorspace = create_cspace_CalRGB(png_ptr, png_info_ptr);
}
if (!colorspace)
colorspace = pdf_new_name("DeviceRGB");
switch (trans_type) {
case PDF_TRANS_TYPE_BINARY:
mask = create_ckey_mask(png_ptr, png_info_ptr);
break;
/* rowbytes changes 4 to 3 at here */
case PDF_TRANS_TYPE_ALPHA:
mask = strip_soft_mask(png_ptr, png_info_ptr,
stream_data_ptr, &rowbytes, width, height);
break;
default:
mask = NULL;
}
info.num_components = 3;
break;
case PNG_COLOR_TYPE_GRAY:
case PNG_COLOR_TYPE_GRAY_ALPHA:
if (png_get_valid(png_ptr, png_info_ptr, PNG_INFO_iCCP))
colorspace = create_cspace_ICCBased(png_ptr, png_info_ptr);
else if (intent) {
colorspace = create_cspace_sRGB(png_ptr, png_info_ptr);
} else {
colorspace = create_cspace_CalGray(png_ptr, png_info_ptr);
}
if (!colorspace)
colorspace = pdf_new_name("DeviceGray");
switch (trans_type) {
case PDF_TRANS_TYPE_BINARY:
mask = create_ckey_mask(png_ptr, png_info_ptr);
break;
case PDF_TRANS_TYPE_ALPHA:
mask = strip_soft_mask(png_ptr, png_info_ptr,
stream_data_ptr, &rowbytes, width, height);
break;
default:
mask = NULL;
}
info.num_components = 1;
break;
default:
WARN("%s: Unknown PNG colortype %d.", PNG_DEBUG_STR, color_type);
}
pdf_add_dict(stream_dict, pdf_new_name("ColorSpace"), colorspace);
pdf_add_stream(stream, stream_data_ptr, rowbytes*height);
RELEASE(stream_data_ptr);
if (mask) {
if (trans_type == PDF_TRANS_TYPE_BINARY)
pdf_add_dict(stream_dict, pdf_new_name("Mask"), mask);
else if (trans_type == PDF_TRANS_TYPE_ALPHA) {
if (info.bits_per_component >= 8 && info.width > 64) {
pdf_stream_set_predictor(mask, 2, info.width,
info.bits_per_component, 1);
}
pdf_add_dict(stream_dict, pdf_new_name("SMask"), pdf_ref_obj(mask));
pdf_release_obj(mask);
} else {
WARN("%s: Unknown transparency type...???", PNG_DEBUG_STR);
pdf_release_obj(mask);
}
}
/* Finally read XMP Metadata
* See, XMP Specification Part 3, Storage in Files
* http://www.adobe.com/jp/devnet/xmp.html
*
* We require libpng version >= 1.6.14 since prior versions
* of libpng had a bug that incorrectly treat the compression
* flag of iTxt chunks.
*/
#if PNG_LIBPNG_VER >= 10614
if (pdf_get_version() >= 4) {
png_textp text_ptr;
pdf_obj *XMP_stream, *XMP_stream_dict;
int i, num_text;
int have_XMP = 0;
num_text = png_get_text(png_ptr, png_info_ptr, &text_ptr, NULL);
for (i = 0; i < num_text; i++) {
if (!memcmp(text_ptr[i].key, "XML:com.adobe.xmp", 17)) {
/* XMP found */
if (text_ptr[i].compression != PNG_ITXT_COMPRESSION_NONE ||
text_ptr[i].itxt_length == 0)
WARN("%s: Invalid value(s) in iTXt chunk for XMP Metadata.", PNG_DEBUG_STR);
else if (have_XMP)
WARN("%s: Multiple XMP Metadata. Don't know how to treat it.", PNG_DEBUG_STR);
else {
/* We compress XMP metadata for included images here.
* It is not recommended to compress XMP metadata for PDF documents but
* we compress XMP metadata for included images here to avoid confusing
* application programs that only want PDF document global XMP metadata
* and scan for that.
*/
XMP_stream = pdf_new_stream(STREAM_COMPRESS);
XMP_stream_dict = pdf_stream_dict(XMP_stream);
pdf_add_dict(XMP_stream_dict,
pdf_new_name("Type"), pdf_new_name("Metadata"));
pdf_add_dict(XMP_stream_dict,
pdf_new_name("Subtype"), pdf_new_name("XML"));
pdf_add_stream(XMP_stream, text_ptr[i].text, text_ptr[i].itxt_length);
pdf_add_dict(stream_dict,
pdf_new_name("Metadata"), pdf_ref_obj(XMP_stream));
pdf_release_obj(XMP_stream);
have_XMP = 1;
}
}
}
}
#endif /* PNG_LIBPNG_VER */
png_read_end(png_ptr, NULL);
/* Cleanup */
if (png_info_ptr)
png_destroy_info_struct(png_ptr, &png_info_ptr);
if (png_ptr)
png_destroy_read_struct(&png_ptr, NULL, NULL);
if (color_type != PNG_COLOR_TYPE_PALETTE &&
info.bits_per_component >= 8 &&
info.height > 64) {
pdf_stream_set_predictor(stream, 15, info.width,
info.bits_per_component, info.num_components);
}
pdf_ximage_set_image(ximage, &info, stream);
return 0;
}
