int Type0Font_cache_find (const char *map_name, int cmap_id, fontmap_opt *fmap_opt) { int font_id = -1; Type0Font *font; CIDFont *cidfont; CMap *cmap; CIDSysInfo *csi; char *fontname = NULL; int cid_id = -1, parent_id = -1, wmode = 0; int pdf_ver; pdf_ver = pdf_get_version(); if (!map_name || cmap_id < 0 || pdf_ver < 2) return -1; /* * Encoding is Identity-H or Identity-V according as thier WMode value. * * We do not use match against the map_name since fonts (TrueType) covers * characters across multiple character collection (eg, Adobe-Japan1 and * Adobe-Japan2) must be splited into multiple CID-keyed fonts. */ cmap = CMap_cache_get(cmap_id); csi = (CMap_is_Identity(cmap)) ? NULL : CMap_get_CIDSysInfo(cmap) ; cid_id = CIDFont_cache_find(map_name, csi, fmap_opt); if (cid_id < 0) return -1; /* * The descendant CID-keyed font has already been registerd. * If CID-keyed font with ID = cid_id is new font, then create new parent * Type 0 font. Otherwise, there already exists parent Type 0 font and * then we find him and return his ID. We must check against their WMode. */ cidfont = CIDFont_cache_get(cid_id); wmode = CMap_get_wmode(cmap); /* Does CID-keyed font already have parent ? */ parent_id = CIDFont_get_parent_id(cidfont, wmode); if (parent_id >= 0) return parent_id; /* If so, we don't need new one. */ /* * CIDFont does not have parent or his parent's WMode does not matched with * wmode. Create new Type0 font. */ if (__cache.count >= __cache.capacity) { __cache.capacity += CACHE_ALLOC_SIZE; __cache.fonts = RENEW(__cache.fonts, __cache.capacity, struct Type0Font); }
static pdf_t *init_pdf(FILE *fp, const char *name) { pdf_t *pdf; pdf = pdf_new(name); pdf_get_version(fp, pdf); pdf_load_xrefs(fp, pdf); pdf_load_pages_kids(fp, pdf); return pdf; }
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; }
/* 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; }
static int check_transparency (png_structp png_ptr, png_infop info_ptr) { int trans_type; unsigned pdf_version; png_byte color_type; png_color_16p trans_values; png_bytep trans; int num_trans; pdf_version = pdf_get_version(); color_type = png_get_color_type(png_ptr, info_ptr); /* * First we set trans_type to appropriate value for PNG image. */ if (color_type == PNG_COLOR_TYPE_RGB_ALPHA || color_type == PNG_COLOR_TYPE_GRAY_ALPHA) { trans_type = PDF_TRANS_TYPE_ALPHA; } else if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS) && png_get_tRNS(png_ptr, info_ptr, &trans, &num_trans, &trans_values)) { /* Have valid tRNS chunk. */ switch (color_type) { case PNG_COLOR_TYPE_PALETTE: /* Use color-key mask if possible. */ trans_type = PDF_TRANS_TYPE_BINARY; while (num_trans-- > 0) { if (trans[num_trans] != 0x00 && trans[num_trans] != 0xff) { /* This seems not binary transparency */ trans_type = PDF_TRANS_TYPE_ALPHA; break; } } break; case PNG_COLOR_TYPE_GRAY: case PNG_COLOR_TYPE_RGB: /* RGB or GRAY, single color specified by trans_values is transparent. */ trans_type = PDF_TRANS_TYPE_BINARY; break; default: /* Else tRNS silently ignored. */ trans_type = PDF_TRANS_TYPE_NONE; } } else { /* no transparency */ trans_type = PDF_TRANS_TYPE_NONE; } /* * Now we check PDF version. * We can convert alpha cahnnels to explicit mask via user supplied alpha- * threshold value. But I will not do that. */ if (( pdf_version < 3 && trans_type != PDF_TRANS_TYPE_NONE ) || ( pdf_version < 4 && trans_type == PDF_TRANS_TYPE_ALPHA )) { /* * No transparency supported but PNG uses transparency, or Soft-Mask * required but no support for it is available in this version of PDF. * We must do pre-composition of image with the background image here. But, * we cannot do that in general since dvipdfmx is not a rasterizer. What we * can do here is to composite image with a rectangle filled with the * background color. However, images are stored as an Image XObject which * can be referenced anywhere in the PDF document content. Hence, we cannot * know the correct background color at this time. So we will choose white * as background color, which is most probable color in our cases. * We ignore bKGD chunk. */ png_color_16 bg; bg.red = 255; bg.green = 255; bg.blue = 255; bg.gray = 255; bg.index = 0; png_set_background(png_ptr, &bg, PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0); WARN("%s: Transparency will be ignored. (no support in PDF ver. < 1.3)", PNG_DEBUG_STR); if (pdf_version < 3) WARN("%s: Please use -V 3 option to enable binary transparency support.", PNG_DEBUG_STR); if (pdf_version < 4) WARN("%s: Please use -V 4 option to enable full alpha channel support.", PNG_DEBUG_STR); trans_type = PDF_TRANS_TYPE_NONE; } return trans_type; }
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; }