Remove experimental/PdfViewer

experimental/PdfViewer/SkPdfFont.cpp

-/*
- * Copyright 2013 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "SkPdfFont.h"
-
-#include "SkPdfNativeTokenizer.h"
-#include "SkStream.h"
-#include "SkTypeface.h"
-
-SkTDict<SkPdfStandardFontEntry>& getStandardFonts() {
-    static SkTDict<SkPdfStandardFontEntry> gPdfStandardFonts(100);
-
-    // TODO (edisonn): , vs - ? what does it mean?
-    // TODO (edisonn): MT, PS, Oblique=italic?, ... what does it mean?
-    if (gPdfStandardFonts.count() == 0) {
-        gPdfStandardFonts.set("Arial", SkPdfStandardFontEntry("Arial", false, false));
-        gPdfStandardFonts.set("Arial,Bold", SkPdfStandardFontEntry("Arial", true, false));
-        gPdfStandardFonts.set("Arial,BoldItalic", SkPdfStandardFontEntry("Arial", true, true));
-        gPdfStandardFonts.set("Arial,Italic", SkPdfStandardFontEntry("Arial", false, true));
-        gPdfStandardFonts.set("Arial-Bold", SkPdfStandardFontEntry("Arial", true, false));
-        gPdfStandardFonts.set("Arial-BoldItalic", SkPdfStandardFontEntry("Arial", true, true));
-        gPdfStandardFonts.set("Arial-BoldItalicMT", SkPdfStandardFontEntry("Arial", true, true));
-        gPdfStandardFonts.set("Arial-BoldMT", SkPdfStandardFontEntry("Arial", true, false));
-        gPdfStandardFonts.set("Arial-Italic", SkPdfStandardFontEntry("Arial", false, true));
-        gPdfStandardFonts.set("Arial-ItalicMT", SkPdfStandardFontEntry("Arial", false, true));
-        gPdfStandardFonts.set("ArialMT", SkPdfStandardFontEntry("Arial", false, false));
-        gPdfStandardFonts.set("Courier", SkPdfStandardFontEntry("Courier New", false, false));
-        gPdfStandardFonts.set("Courier,Bold", SkPdfStandardFontEntry("Courier New", true, false));
-        gPdfStandardFonts.set("Courier,BoldItalic", SkPdfStandardFontEntry("Courier New", true, true));
-        gPdfStandardFonts.set("Courier,Italic", SkPdfStandardFontEntry("Courier New", false, true));
-        gPdfStandardFonts.set("Courier-Bold", SkPdfStandardFontEntry("Courier New", true, false));
-        gPdfStandardFonts.set("Courier-BoldOblique", SkPdfStandardFontEntry("Courier New", true, true));
-        gPdfStandardFonts.set("Courier-Oblique", SkPdfStandardFontEntry("Courier New", false, true));
-        gPdfStandardFonts.set("CourierNew", SkPdfStandardFontEntry("Courier New", false, false));
-        gPdfStandardFonts.set("CourierNew,Bold", SkPdfStandardFontEntry("Courier New", true, false));
-        gPdfStandardFonts.set("CourierNew,BoldItalic", SkPdfStandardFontEntry("Courier New", true, true));
-        gPdfStandardFonts.set("CourierNew,Italic", SkPdfStandardFontEntry("Courier New", false, true));
-        gPdfStandardFonts.set("CourierNew-Bold", SkPdfStandardFontEntry("Courier New", true, false));
-        gPdfStandardFonts.set("CourierNew-BoldItalic", SkPdfStandardFontEntry("Courier New", true, true));
-        gPdfStandardFonts.set("CourierNew-Italic", SkPdfStandardFontEntry("Courier New", false, true));
-        gPdfStandardFonts.set("CourierNewPS-BoldItalicMT", SkPdfStandardFontEntry("Courier New", true, true));
-        gPdfStandardFonts.set("CourierNewPS-BoldMT", SkPdfStandardFontEntry("Courier New", true, false));
-        gPdfStandardFonts.set("CourierNewPS-ItalicMT", SkPdfStandardFontEntry("Courier New", false, true));
-        gPdfStandardFonts.set("CourierNewPSMT", SkPdfStandardFontEntry("Courier New", false, false));
-        gPdfStandardFonts.set("Helvetica", SkPdfStandardFontEntry("Helvetica", false, false));
-        gPdfStandardFonts.set("Helvetica,Bold", SkPdfStandardFontEntry("Helvetica", true, false));
-        gPdfStandardFonts.set("Helvetica,BoldItalic", SkPdfStandardFontEntry("Helvetica", true, true));
-        gPdfStandardFonts.set("Helvetica,Italic", SkPdfStandardFontEntry("Helvetica", false, true));
-        gPdfStandardFonts.set("Helvetica-Bold", SkPdfStandardFontEntry("Helvetica", true, false));
-        gPdfStandardFonts.set("Helvetica-BoldItalic", SkPdfStandardFontEntry("Helvetica", true, true));
-        gPdfStandardFonts.set("Helvetica-BoldOblique", SkPdfStandardFontEntry("Helvetica", true, true));
-        gPdfStandardFonts.set("Helvetica-Italic", SkPdfStandardFontEntry("Helvetica", false, true));
-        gPdfStandardFonts.set("Helvetica-Oblique", SkPdfStandardFontEntry("Helvetica", false, true));
-        gPdfStandardFonts.set("Times-Bold", SkPdfStandardFontEntry("Times New Roman", true, false));
-        gPdfStandardFonts.set("Times-BoldItalic", SkPdfStandardFontEntry("Times New Roman", true, true));
-        gPdfStandardFonts.set("Times-Italic", SkPdfStandardFontEntry("Times New Roman", false, true));
-        gPdfStandardFonts.set("Times-Roman", SkPdfStandardFontEntry("Times New Roman", false, false));
-        gPdfStandardFonts.set("TimesNewRoman", SkPdfStandardFontEntry("Times New Roman", false, false));
-        gPdfStandardFonts.set("TimesNewRoman,Bold", SkPdfStandardFontEntry("Times New Roman", true, false));
-        gPdfStandardFonts.set("TimesNewRoman,BoldItalic", SkPdfStandardFontEntry("Times New Roman", true, true));
-        gPdfStandardFonts.set("TimesNewRoman,Italic", SkPdfStandardFontEntry("Times New Roman", false, true));
-        gPdfStandardFonts.set("TimesNewRoman-Bold", SkPdfStandardFontEntry("Times New Roman", true, false));
-        gPdfStandardFonts.set("TimesNewRoman-BoldItalic", SkPdfStandardFontEntry("Times New Roman", true, true));
-        gPdfStandardFonts.set("TimesNewRoman-Italic", SkPdfStandardFontEntry("Times New Roman", false, true));
-        gPdfStandardFonts.set("TimesNewRomanPS", SkPdfStandardFontEntry("Times New Roman", false, false));
-        gPdfStandardFonts.set("TimesNewRomanPS-Bold", SkPdfStandardFontEntry("Times New Roman", true, false));
-        gPdfStandardFonts.set("TimesNewRomanPS-BoldItalic", SkPdfStandardFontEntry("Times New Roman", true, true));
-        gPdfStandardFonts.set("TimesNewRomanPS-BoldItalicMT", SkPdfStandardFontEntry("Times New Roman", true, true));
-        gPdfStandardFonts.set("TimesNewRomanPS-BoldMT", SkPdfStandardFontEntry("Times New Roman", true, false));
-        gPdfStandardFonts.set("TimesNewRomanPS-Italic", SkPdfStandardFontEntry("Times New Roman", false, true));
-        gPdfStandardFonts.set("TimesNewRomanPS-ItalicMT", SkPdfStandardFontEntry("Times New Roman", false, true));
-        gPdfStandardFonts.set("TimesNewRomanPSMT", SkPdfStandardFontEntry("Times New Roman", false, false));
-        gPdfStandardFonts.set("Symbol", SkPdfStandardFontEntry("Symbol", false, false));
-        gPdfStandardFonts.set("ZapfDingbats", SkPdfStandardFontEntry("ZapfDingbats", false, false));
-
-        // TODO(edisonn): these are hacks. Load Post Script font name.
-        // see FT_Get_Postscript_Name
-        // Font config is not using it, yet.
-        //https://bugs.freedesktop.org/show_bug.cgi?id=18095
-
-        gPdfStandardFonts.set("Arial-Black", SkPdfStandardFontEntry("Arial", true, false));
-        gPdfStandardFonts.set("DejaVuSans", SkPdfStandardFontEntry("DejaVu Sans", false, false));
-        gPdfStandardFonts.set("DejaVuSansMono", SkPdfStandardFontEntry("DejaVuSans Mono", false, false));
-        gPdfStandardFonts.set("DejaVuSansMono-Bold", SkPdfStandardFontEntry("DejaVuSans Mono", true, false));
-        gPdfStandardFonts.set("DejaVuSansMono-Oblique", SkPdfStandardFontEntry("DejaVuSans Mono", false, true));
-        gPdfStandardFonts.set("Georgia-Bold", SkPdfStandardFontEntry("Georgia", true, false));
-        gPdfStandardFonts.set("Georgia-BoldItalic", SkPdfStandardFontEntry("Georgia", true, true));
-        gPdfStandardFonts.set("Georgia-Italic", SkPdfStandardFontEntry("Georgia", false, true));
-        gPdfStandardFonts.set("TrebuchetMS", SkPdfStandardFontEntry("Trebuchet MS", false, false));
-        gPdfStandardFonts.set("TrebuchetMS-Bold", SkPdfStandardFontEntry("Trebuchet MS", true, false));
-        gPdfStandardFonts.set("Verdana-Bold", SkPdfStandardFontEntry("Verdana", true, false));
-        gPdfStandardFonts.set("WenQuanYiMicroHei", SkPdfStandardFontEntry("WenQuanYi Micro Hei", false, false));
-
-        // TODO(edisonn): list all fonts available, buil post script name as in pdf spec
-        // TODO(edisonn): Does it work in all OSs ?
-        /*
-         * The PostScript name for the value of BaseFontis determined in one of two ways:
-• Use the PostScript name that is an optional entry in the “name” table of the
-TrueType font itself.
-• In the absence of such an entry in the “name” table, derive a PostScript name
-from the name by which the font is known in the host operating system: on a
-Windows system, it is based on the lfFaceName field in a LOGFONT structure; in
-the Mac OS, it is based on the name of the FONDresource. If the name contains
-any spaces, the spaces are removed.
-If the font in a source document uses a bold or italic style, but there is no font
-data for that style, the host operating system will synthesize the style. In this case,
-a comma and the style name (one of Bold, Italic, or BoldItalic) are appended to the
-font name. For example, for a TrueType font that is a bold variant of the New
-         */
-
-        /*
-         * If the value of Subtype is MMType1.
-• If the PostScript name of the instance contains spaces, the spaces are replaced
-by underscores in the value of BaseFont. For instance, as illustrated in Example
-5.7, the name “MinionMM 366 465 11 ” (which ends with a space character)
-becomes /MinionMM_366_465_11_.
-         */
-    }
-
-    return gPdfStandardFonts;
-}
-
-SkTypeface* SkTypefaceFromPdfStandardFont(const char* fontName, bool bold, bool italic) {
-    SkTDict<SkPdfStandardFontEntry>& standardFontMap = getStandardFonts();
-
-    SkTypeface* typeface = NULL;
-    SkPdfStandardFontEntry fontData;
-
-    if (standardFontMap.find(fontName, &fontData)) {
-        // TODO(edisonn): How does the bold/italic specified in standard definition combines with
-        // the one in /font key? use OR for now.
-        bold = bold || fontData.fIsBold;
-        italic = italic || fontData.fIsItalic;
-
-        typeface = SkTypeface::CreateFromName(
-            fontData.fName,
-            SkTypeface::Style((bold ? SkTypeface::kBold : 0) |
-                              (italic ? SkTypeface::kItalic : 0)));
-    } else {
-        typeface = SkTypeface::CreateFromName(
-            fontName,
-            SkTypeface::kNormal);
-    }
-
-    if (typeface) {
-        typeface->ref();
-    }
-    return typeface;
-}
-
-SkPdfFont* SkPdfFont::fontFromFontDescriptor(SkPdfNativeDoc* doc, SkPdfFontDescriptorDictionary* fd,
-                                             bool loadFromName) {
-    // TODO(edisonn): partial implementation.
-    // Only one, at most be available
-    SkPdfStream* pdfStream = NULL;
-    if (fd->has_FontFile()) {
-        pdfStream = fd->FontFile(doc);
-    } else if (fd->has_FontFile2()) {
-        pdfStream = fd->FontFile2(doc);
-    } if (fd->has_FontFile3()) {
-        pdfStream = fd->FontFile3(doc);
-    } else {
-        if (loadFromName) {
-            return fontFromName(doc, fd, fd->FontName(doc).c_str());
-        }
-    }
-
-    const unsigned char* uncompressedStream = NULL;
-    size_t uncompressedStreamLength = 0;
-
-    // TODO(edisonn): report warning to be used in testing.
-    if (!pdfStream ||
-            !pdfStream->GetFilteredStreamRef(&uncompressedStream, &uncompressedStreamLength) ||
-            !uncompressedStream ||
-            !uncompressedStreamLength) {
-        return NULL;
-    }
-
-    SkMemoryStream* skStream = new SkMemoryStream(uncompressedStream, uncompressedStreamLength);
-    SkTypeface* face = SkTypeface::CreateFromStream(skStream);
-
-    if (face == NULL) {
-        // TODO(edisonn): report warning to be used in testing.
-        return NULL;
-    }
-
-    face->ref();
-
-    return new SkPdfStandardFont(face);
-}
-
-SkPdfFont* fontFromName(SkPdfNativeDoc* doc, SkPdfNativeObject* obj, const char* fontName) {
-    SkTypeface* typeface = SkTypefaceFromPdfStandardFont(fontName, false, false);
-    if (typeface != NULL) {
-        return new SkPdfStandardFont(typeface);
-    }
-
-    // TODO(edisonn): perf - make a map
-    for (unsigned int i = 0 ; i < doc->objects(); i++) {
-        SkPdfNativeObject* obj = doc->object(i);
-        if (!obj || !obj->isDictionary()) {
-            continue;
-        }
-
-        SkPdfFontDescriptorDictionary* fd = obj->asDictionary()->asFontDescriptorDictionary();
-
-        if (!fd->valid()) {
-            continue;
-        }
-
-        if (fd->has_FontName() && fd->FontName(doc).equals(fontName)) {
-            SkPdfFont* font = SkPdfFont::fontFromFontDescriptor(doc, fd, false);
-            if (font) {
-                return font;
-            } else {
-                // failed to load font descriptor
-                break;
-            }
-        }
-    }
-
-    // TODO(edisonn): warning/report issue
-    return SkPdfFont::Default();
-}
-
-SkPdfFont* SkPdfFont::fontFromPdfDictionaryOnce(SkPdfNativeDoc* doc, SkPdfFontDictionary* dict) {
-    // TODO(edisonn): keep the type in a smart way in the SkPdfNativeObject
-    // 1) flag, isResolved (1bit): reset at reset, add/remove/update (array) and set(dict)
-    // in a tree like structure, 3-4 bits for all the datatypes inheriting from obj (int, real, ...)
-    // if is a dict, reserve a few bytes to encode type of dict, and so on like in a tree
-    // issue: type can be determined from context! atribute night be missing/wrong
-    switch (doc->mapper()->mapFontDictionary(dict)) {
-        case kType0FontDictionary_SkPdfNativeObjectType:
-            return fontFromType0FontDictionary(doc, dict->asType0FontDictionary());
-
-        case kTrueTypeFontDictionary_SkPdfNativeObjectType:
-            return fontFromTrueTypeFontDictionary(doc, dict->asTrueTypeFontDictionary());
-
-        case kType1FontDictionary_SkPdfNativeObjectType:
-            return fontFromType1FontDictionary(doc, dict->asType1FontDictionary());
-
-        case kMultiMasterFontDictionary_SkPdfNativeObjectType:
-            return fontFromMultiMasterFontDictionary(doc, dict->asMultiMasterFontDictionary());
-
-        case kType3FontDictionary_SkPdfNativeObjectType:
-            return fontFromType3FontDictionary(doc, dict->asType3FontDictionary());
-
-        default:
-            // TODO(edisonn): report error?
-            return NULL;
-    }
-}
-
-SkPdfFont* SkPdfFont::fontFromPdfDictionary(SkPdfNativeDoc* doc, SkPdfFontDictionary* dict) {
-    if (dict == NULL) {
-        return NULL;  // TODO(edisonn): report default one?
-    }
-
-    if (!dict->hasData(SkPdfNativeObject::kFont_Data)) {
-        dict->setData(fontFromPdfDictionaryOnce(doc, dict), SkPdfNativeObject::kFont_Data);
-    }
-    return (SkPdfFont*)dict->data(SkPdfNativeObject::kFont_Data);
-}
-
-
-
-SkPdfType0Font* SkPdfFont::fontFromType0FontDictionary(SkPdfNativeDoc* doc,
-                                                       SkPdfType0FontDictionary* dict) {
-    if (dict == NULL) {
-        return NULL;  // default one?
-    }
-
-    return new SkPdfType0Font(doc, dict);
-}
-
-SkPdfType1Font* SkPdfFont:: fontFromType1FontDictionary(SkPdfNativeDoc* doc,
-                                                        SkPdfType1FontDictionary* dict) {
-    if (dict == NULL) {
-        return NULL;  // default one?
-    }
-
-    return new SkPdfType1Font(doc, dict);
-}
-
-SkPdfType3Font* SkPdfFont::fontFromType3FontDictionary(SkPdfNativeDoc* doc,
-                                                       SkPdfType3FontDictionary* dict) {
-    if (dict == NULL) {
-        return NULL;  // default one?
-    }
-
-
-
-    return new SkPdfType3Font(doc, dict);
-}
-
-SkPdfTrueTypeFont* SkPdfFont::fontFromTrueTypeFontDictionary(SkPdfNativeDoc* doc,
-                                                             SkPdfTrueTypeFontDictionary* dict) {
-    if (dict == NULL) {
-        return NULL;  // default one?
-    }
-
-    return new SkPdfTrueTypeFont(doc, dict);
-}
-
-SkPdfMultiMasterFont* SkPdfFont::fontFromMultiMasterFontDictionary(
-        SkPdfNativeDoc* doc, SkPdfMultiMasterFontDictionary* dict) {
-    if (dict == NULL) {
-        return NULL;  // default one?
-    }
-
-    return new SkPdfMultiMasterFont(doc, dict);
-}
-
-static int skstoi(const SkPdfNativeObject* str) {
-    // TODO(edisonn): report err of it is not a (hex) string
-    int ret = 0;
-    for (unsigned int i = 0 ; i < str->lenstr(); i++) {
-        ret = (ret << 8) + ((unsigned char*)str->c_str())[i];
-    }
-    // TODO(edisonn): character larger than 0x0000ffff not supported right now.
-    return ret & 0x0000ffff;
-}
-
-#define tokenIsKeyword(token,keyword) (token.fType == kKeyword_TokenType && \
-                                      token.fKeywordLength==sizeof(keyword)-1 && \
-                                      strncmp(token.fKeyword, keyword, sizeof(keyword)-1) == 0)
-
-SkPdfToUnicode::SkPdfToUnicode(SkPdfNativeDoc* parsed, SkPdfStream* stream) {
-    fCMapEncoding = NULL;
-    fCMapEncodingFlag = NULL;
-
-    if (stream) {
-        // Since font will be cached, the font has to sit in the per doc allocator, not to be
-        // freed after the page is done drawing.
-        SkPdfNativeTokenizer tokenizer(stream, parsed->allocator(), parsed);
-        PdfToken token;
-
-        fCMapEncoding = new unsigned short[256 * 256];
-        fCMapEncodingFlag = new unsigned char[256 * 256];
-        for (int i = 0 ; i < 256 * 256; i++) {
-            fCMapEncoding[i] = i;
-            fCMapEncodingFlag[i] = 0;
-        }
-
-        // TODO(edisonn): deal with multibyte character, or longer strings.
-        // Right now we deal with up 2 characters, e.g. <0020> but not longer like <00660066006C>
-        //2 beginbfrange
-        //<0000> <005E> <0020>
-        //<005F> <0061> [<00660066> <00660069> <00660066006C>]
-
-        while (tokenizer.readToken(&token)) {
-
-            if (tokenIsKeyword(token, "begincodespacerange")) {
-                while (tokenizer.readToken(&token) &&
-                       !tokenIsKeyword(token, "endcodespacerange")) {
-//                    tokenizer.PutBack(token);
-//                    tokenizer.readToken(&token);
-                    // TODO(edisonn): check token type! ignore/report errors.
-                    int start = skstoi(token.fObject);
-                    tokenizer.readToken(&token);
-                    int end = skstoi(token.fObject);
-                    for (int i = start; i <= end; i++) {
-                        fCMapEncodingFlag[i] |= 1;
-                    }
-                }
-            }
-
-            if (tokenIsKeyword(token, "beginbfchar")) {
-                while (tokenizer.readToken(&token) && !tokenIsKeyword(token, "endbfchar")) {
-//                    tokenizer.PutBack(token);
-//                    tokenizer.readToken(&token);
-                    int from = skstoi(token.fObject);
-                    tokenizer.readToken(&token);
-                    int to = skstoi(token.fObject);
-
-                    fCMapEncodingFlag[from] |= 2;
-                    fCMapEncoding[from] = to;
-                }
-            }
-
-            if (tokenIsKeyword(token, "beginbfrange")) {
-                while (tokenizer.readToken(&token) && !tokenIsKeyword(token, "endbfrange")) {
-//                    tokenizer.PutBack(token);
-//                    tokenizer.readToken(&token);
-                    int start = skstoi(token.fObject);
-                    tokenizer.readToken(&token);
-                    int end = skstoi(token.fObject);
-
-
-                    tokenizer.readToken(&token); // [ or just an array directly?
-                    // do not putback, we will reuse the read. See next commented read.
-//                    tokenizer.PutBack(token);
-
-                    // TODO(edisonn): read spec: any string or only hex string?
-                    if (token.fType == kObject_TokenType && token.fObject->isAnyString()) {
-//                        tokenizer.readToken(&token);
-                        int value = skstoi(token.fObject);
-
-                        for (int i = start; i <= end; i++) {
-                            fCMapEncodingFlag[i] |= 2;
-                            fCMapEncoding[i] = value;
-                            value++;
-                            // if i != end, verify last byte id not if, ignore/report error
-                        }
-
-                        // read one string
-                    } else if (token.fType == kObject_TokenType && token.fObject->isArray()) {
-//                        tokenizer.readToken(&token);
-                        // read array
-                        for (unsigned int i = 0; i < token.fObject->size(); i++) {
-                            fCMapEncodingFlag[start + i] |= 2;
-                            fCMapEncoding[start + i] = skstoi((*token.fObject)[i]);
-                        }
-                    } else {
-                        tokenizer.PutBack(token);
-                    }
-                }
-            }
-        }
-    }
-}
-
-SkPdfType0Font::SkPdfType0Font(SkPdfNativeDoc* doc, SkPdfType0FontDictionary* dict) {
-    fBaseFont = fontFromName(doc, dict, dict->BaseFont(doc).c_str());
-    fEncoding = NULL;
-
-    if (dict->has_Encoding()) {
-        if (dict->isEncodingAName(doc)) {
-            fEncoding = SkPdfEncoding::fromName(dict->getEncodingAsName(doc).c_str());
-        } else if (dict->isEncodingAStream(doc)) {
-            // TODO(edisonn): NYI
-            //fEncoding = loadEncodingFromStream(dict->getEncodingAsStream());
-        } else {
-            // TODO(edisonn): error ... warning .. assert?
-        }
-    }
-
-    if (dict->has_ToUnicode()) {
-        fToUnicode = new SkPdfToUnicode(doc, dict->ToUnicode(doc));
-    }
-}
-
-SkTDict<SkPdfEncoding*>& getStandardEncodings() {
-    static SkTDict<SkPdfEncoding*> encodings(10);
-    if (encodings.count() == 0) {
-        encodings.set("Identity-H", SkPdfIdentityHEncoding::instance());
-    }
-
-    return encodings;
-}
-
-SkPdfEncoding* SkPdfEncoding::fromName(const char* name) {
-    SkPdfEncoding* encoding = NULL;
-    if (!getStandardEncodings().find(name, &encoding)) {
-        encoding = NULL;
-    }
-
-#ifdef PDF_TRACE
-    if (encoding == NULL) {
-        printf("Encoding not found: %s\n", name);
-    }
-#endif
-    return encoding;
-}