7ee12ca99f
Review URL: https://codereview.chromium.org/22239002 git-svn-id: http://skia.googlecode.com/svn/trunk@10541 2bbb7eff-a529-9590-31e7-b0007b416f81
425 lines
13 KiB
C++
425 lines
13 KiB
C++
#ifndef __DEFINED__SkPdfFont
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#define __DEFINED__SkPdfFont
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#include "SkPdfHeaders_autogen.h"
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#include "SkPdfMapper_autogen.h"
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#include <map>
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#include <string>
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#include "SkTypeface.h"
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#include "SkUtils.h"
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#include "SkPdfBasics.h"
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#include "SkPdfUtils.h"
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class SkPdfType0Font;
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class SkPdfType1Font;
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class SkPdfType3Font;
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class SkPdfTrueTypeFont;
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class SkPdfMultiMasterFont;
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class SkPdfFont;
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struct SkPdfStandardFontEntry {
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// We don't own this pointer!
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const char* fName;
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bool fIsBold;
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bool fIsItalic;
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SkPdfStandardFontEntry()
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: fName(NULL),
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fIsBold(false),
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fIsItalic(false) {}
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SkPdfStandardFontEntry(const char* name, bool bold, bool italic)
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: fName(name),
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fIsBold(bold),
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fIsItalic(italic) {}
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};
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std::map<std::string, SkPdfStandardFontEntry>& getStandardFonts();
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SkTypeface* SkTypefaceFromPdfStandardFont(const char* fontName, bool bold, bool italic);
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SkPdfFont* fontFromName(SkNativeParsedPDF* doc, SkPdfObject* obj, const char* fontName);
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struct SkUnencodedText {
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void* text;
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int len;
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public:
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SkUnencodedText(const SkPdfString* obj) {
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text = (void*)obj->c_str();
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len = obj->lenstr();
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}
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};
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struct SkDecodedText {
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uint16_t* text;
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int len;
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public:
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unsigned int operator[](int i) const { return text[i]; }
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int size() const { return len; }
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};
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struct SkUnicodeText {
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uint16_t* text;
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int len;
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public:
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unsigned int operator[](int i) const { return text[i]; }
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int size() const { return len; }
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};
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class SkPdfEncoding {
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public:
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virtual bool decodeText(const SkUnencodedText& textIn, SkDecodedText* textOut) const = 0;
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static SkPdfEncoding* fromName(const char* name);
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};
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std::map<std::string, SkPdfEncoding*>& getStandardEncodings();
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class SkPdfToUnicode {
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SkNativeParsedPDF* fParsed;
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// TODO(edisonn): hide public members
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public:
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unsigned short* fCMapEncoding;
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unsigned char* fCMapEncodingFlag;
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SkPdfToUnicode(SkNativeParsedPDF* parsed, SkPdfStream* stream);
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};
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class SkPdfIdentityHEncoding : public SkPdfEncoding {
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public:
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virtual bool decodeText(const SkUnencodedText& textIn, SkDecodedText* textOut) const {
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// TODO(edisonn): SkASSERT(textIn.len % 2 == 0); or report error?
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uint16_t* text = (uint16_t*)textIn.text;
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textOut->text = new uint16_t[textIn.len / 2];
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textOut->len = textIn.len / 2;
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for (int i = 0; i < textOut->len; i++) {
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textOut->text[i] = ((text[i] << 8) & 0xff00) | ((text[i] >> 8) & 0x00ff);
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}
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return true;
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}
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static SkPdfIdentityHEncoding* instance() {
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static SkPdfIdentityHEncoding* inst = new SkPdfIdentityHEncoding();
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return inst;
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}
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};
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// TODO(edisonn): using this one when no encoding is specified
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class SkPdfDefaultEncoding : public SkPdfEncoding {
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public:
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virtual bool decodeText(const SkUnencodedText& textIn, SkDecodedText* textOut) const {
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// TODO(edisonn): SkASSERT(textIn.len % 2 == 0); or report error?
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unsigned char* text = (unsigned char*)textIn.text;
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textOut->text = new uint16_t[textIn.len];
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textOut->len = textIn.len;
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for (int i = 0; i < textOut->len; i++) {
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textOut->text[i] = text[i];
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}
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return true;
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}
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static SkPdfDefaultEncoding* instance() {
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static SkPdfDefaultEncoding* inst = new SkPdfDefaultEncoding();
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return inst;
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}
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};
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class SkPdfCIDToGIDMapIdentityEncoding : public SkPdfEncoding {
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public:
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virtual bool decodeText(const SkUnencodedText& textIn, SkDecodedText* textOut) const {
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// TODO(edisonn): SkASSERT(textIn.len % 2 == 0); or report error?
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uint16_t* text = (uint16_t*)textIn.text;
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textOut->text = new uint16_t[textIn.len / 2];
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textOut->len = textIn.len / 2;
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for (int i = 0; i < textOut->len; i++) {
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textOut->text[i] = ((text[i] << 8) & 0xff00) | ((text[i] >> 8) & 0x00ff);
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}
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return true;
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}
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static SkPdfCIDToGIDMapIdentityEncoding* instance() {
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static SkPdfCIDToGIDMapIdentityEncoding* inst = new SkPdfCIDToGIDMapIdentityEncoding();
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return inst;
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}
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};
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class SkPdfFont {
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public:
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SkPdfFont* fBaseFont;
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SkPdfEncoding* fEncoding;
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SkPdfToUnicode* fToUnicode;
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public:
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SkPdfFont() : fBaseFont(NULL), fEncoding(SkPdfDefaultEncoding::instance()), fToUnicode(NULL) {}
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virtual ~SkPdfFont() {
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// TODO(edisonn): NYI (will leak for now)
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}
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const SkPdfEncoding* encoding() const {return fEncoding;}
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void drawText(const SkDecodedText& text, SkPaint* paint, PdfContext* pdfContext, SkCanvas* canvas) {
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for (int i = 0 ; i < text.size(); i++) {
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double width = drawOneChar(text[i], paint, pdfContext, canvas);
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pdfContext->fGraphicsState.fMatrixTm.preTranslate(SkDoubleToScalar(width), SkDoubleToScalar(0.0));
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canvas->translate(SkDoubleToScalar(width), SkDoubleToScalar(0.0));
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}
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}
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void ToUnicode(const SkDecodedText& textIn, SkUnicodeText* textOut) const {
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if (fToUnicode) {
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textOut->text = new uint16_t[textIn.len];
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textOut->len = textIn.len;
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for (int i = 0; i < textIn.len; i++) {
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textOut->text[i] = fToUnicode->fCMapEncoding[textIn.text[i]];
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}
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} else {
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textOut->text = textIn.text;
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textOut->len = textIn.len;
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}
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};
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inline unsigned int ToUnicode(unsigned int ch) const {
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if (fToUnicode) {
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return fToUnicode->fCMapEncoding[ch];
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} else {
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return ch;
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}
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};
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static SkPdfFont* fontFromPdfDictionary(SkNativeParsedPDF* doc, SkPdfFontDictionary* dict);
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static SkPdfFont* Default() {return fontFromName(NULL, NULL, "TimesNewRoman");}
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static SkPdfType0Font* fontFromType0FontDictionary(SkNativeParsedPDF* doc, SkPdfType0FontDictionary* dict);
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static SkPdfType1Font* fontFromType1FontDictionary(SkNativeParsedPDF* doc, SkPdfType1FontDictionary* dict);
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static SkPdfType3Font* fontFromType3FontDictionary(SkNativeParsedPDF* doc, SkPdfType3FontDictionary* dict);
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static SkPdfTrueTypeFont* fontFromTrueTypeFontDictionary(SkNativeParsedPDF* doc, SkPdfTrueTypeFontDictionary* dict);
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static SkPdfMultiMasterFont* fontFromMultiMasterFontDictionary(SkNativeParsedPDF* doc, SkPdfMultiMasterFontDictionary* dict);
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static SkPdfFont* fontFromFontDescriptor(SkNativeParsedPDF* doc, SkPdfFontDescriptorDictionary* fd, bool loadFromName = true);
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public:
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virtual double drawOneChar(unsigned int ch, SkPaint* paint, PdfContext* pdfContext, SkCanvas* canvas) = 0;
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virtual void afterWord(SkPaint* paint, SkMatrix* matrix) = 0;
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private:
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static SkPdfFont* fontFromPdfDictionaryOnce(SkNativeParsedPDF* doc, SkPdfFontDictionary* dict);
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};
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class SkPdfStandardFont : public SkPdfFont {
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SkTypeface* fTypeface;
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public:
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SkPdfStandardFont(SkTypeface* typeface) : fTypeface(typeface) {}
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public:
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virtual double drawOneChar(unsigned int ch, SkPaint* paint, PdfContext* pdfContext, SkCanvas* canvas) {
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paint->setTypeface(fTypeface);
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paint->setTextEncoding(SkPaint::kUTF8_TextEncoding);
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unsigned long ch4 = ch;
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char utf8[10];
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int len = SkUTF8_FromUnichar(ch4, utf8);
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canvas->drawText(utf8, len, SkDoubleToScalar(0), SkDoubleToScalar(0), *paint);
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SkScalar textWidth = paint->measureText(utf8, len);
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return SkScalarToDouble(textWidth);
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}
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virtual void afterWord(SkPaint* paint, SkMatrix* matrix) {}
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};
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class SkPdfType0Font : public SkPdfFont {
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public:
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SkPdfType0Font(SkNativeParsedPDF* doc, SkPdfType0FontDictionary* dict);
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public:
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virtual double drawOneChar(unsigned int ch, SkPaint* paint, PdfContext* pdfContext, SkCanvas* canvas) {
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return fBaseFont->drawOneChar(ToUnicode(ch), paint, pdfContext, canvas);
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}
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virtual void afterWord(SkPaint* paint, SkMatrix* matrix) {
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}
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};
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class SkPdfType1Font : public SkPdfFont {
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public:
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SkPdfType1Font(SkNativeParsedPDF* doc, SkPdfType1FontDictionary* dict) {
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if (dict->has_FontDescriptor()) {
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fBaseFont = SkPdfFont::fontFromFontDescriptor(doc, dict->FontDescriptor(doc));
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} else {
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fBaseFont = fontFromName(doc, dict, dict->BaseFont(doc).c_str());
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}
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}
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public:
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virtual double drawOneChar(unsigned int ch, SkPaint* paint, PdfContext* pdfContext, SkCanvas* canvas) {
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return fBaseFont->drawOneChar(ToUnicode(ch), paint, pdfContext, canvas);
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}
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virtual void afterWord(SkPaint* paint, SkMatrix* matrix) {
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}
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};
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class SkPdfTrueTypeFont : public SkPdfType1Font {
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public:
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SkPdfTrueTypeFont(SkNativeParsedPDF* doc, SkPdfTrueTypeFontDictionary* dict) : SkPdfType1Font(doc, dict) {
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}
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};
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class SkPdfMultiMasterFont : public SkPdfType1Font {
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public:
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SkPdfMultiMasterFont(SkNativeParsedPDF* doc, SkPdfMultiMasterFontDictionary* dict) : SkPdfType1Font(doc, dict) {
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}
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};
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/*
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class CIDToGIDMap {
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virtual unsigned int map(unsigned int cid) = 0;
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static CIDToGIDMap* fromName(const char* name);
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};
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class CIDToGIDMap_Identity {
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virtual unsigned int map(unsigned int cid) { return cid; }
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static CIDToGIDMap_Identity* instance() {
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static CIDToGIDMap_Identity* inst = new CIDToGIDMap_Identity();
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return inst;
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}
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};
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CIDToGIDMap* CIDToGIDMap::fromName(const char* name) {
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// The only one supported right now is Identity
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if (strcmp(name, "Identity") == 0) {
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return CIDToGIDMap_Identity::instance();
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}
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#ifdef PDF_TRACE
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// TODO(edisonn): warning/report
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printf("Unknown CIDToGIDMap: %s\n", name);
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#endif
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return NULL;
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}
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CIDToGIDMap* fCidToGid;
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*/
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class SkPdfType3Font : public SkPdfFont {
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struct Type3FontChar {
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SkPdfObject* fObj;
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double fWidth;
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};
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SkPdfDictionary* fCharProcs;
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SkPdfEncodingDictionary* fEncodingDict;
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unsigned int fFirstChar;
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unsigned int fLastChar;
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SkRect fFontBBox;
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SkMatrix fFonMatrix;
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Type3FontChar* fChars;
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public:
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SkPdfType3Font(SkNativeParsedPDF* parsed, SkPdfType3FontDictionary* dict) {
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fBaseFont = fontFromName(parsed, dict, dict->BaseFont(parsed).c_str());
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if (dict->has_Encoding()) {
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if (dict->isEncodingAName(parsed)) {
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fEncoding = SkPdfEncoding::fromName(dict->getEncodingAsName(parsed).c_str());
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} else if (dict->isEncodingAEncodingdictionary(parsed)) {
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// No encoding.
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fEncoding = SkPdfDefaultEncoding::instance();
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fEncodingDict = dict->getEncodingAsEncodingdictionary(parsed);
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}
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}
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// null?
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fCharProcs = dict->CharProcs(parsed);
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fToUnicode = NULL;
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if (dict->has_ToUnicode()) {
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fToUnicode = new SkPdfToUnicode(parsed, dict->ToUnicode(parsed));
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}
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fFirstChar = (unsigned int)dict->FirstChar(parsed);
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fLastChar = (unsigned int)dict->LastChar(parsed);
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fFonMatrix = dict->has_FontMatrix() ? dict->FontMatrix(parsed) : SkMatrix::I();
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if (dict->has_FontBBox()) {
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fFontBBox = dict->FontBBox(parsed);
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}
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fChars = new Type3FontChar[fLastChar - fFirstChar + 1];
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memset(fChars, 0, sizeof(fChars[0]) * (fLastChar - fFirstChar + 1));
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const SkPdfArray* widths = dict->Widths(parsed);
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for (unsigned int i = 0 ; i < widths->size(); i++) {
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if ((fFirstChar + i) >= fFirstChar && (fFirstChar + i) <= fLastChar) {
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fChars[i].fWidth = (*widths)[i]->numberValue();
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} else {
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// TODO(edisonn): report pdf corruption
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}
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}
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const SkPdfArray* diffs = fEncodingDict->Differences(parsed);
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unsigned int j = fFirstChar;
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for (unsigned int i = 0 ; i < diffs->size(); i++) {
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if ((*diffs)[i]->isInteger()) {
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j = (unsigned int)(*diffs)[i]->intValue();
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} else if ((*diffs)[i]->isName()) {
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if (j >= fFirstChar && j <= fLastChar) {
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fChars[j - fFirstChar].fObj = fCharProcs->get((*diffs)[i]);
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} else {
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// TODO(edisonn): report pdf corruption
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}
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j++;
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} else {
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// TODO(edisonn): report bad pdf
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}
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}
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}
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public:
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virtual double drawOneChar(unsigned int ch, SkPaint* paint, PdfContext* pdfContext, SkCanvas* canvas) {
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if (ch < fFirstChar || ch > fLastChar || !fChars[ch - fFirstChar].fObj) {
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return fBaseFont->drawOneChar(ToUnicode(ch), paint, pdfContext, canvas);
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}
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#ifdef PDF_TRACE
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printf("Type 3 char to unicode: %c\n", ToUnicode(ch));
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if (ToUnicode(ch) == 'A') {
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printf("break;\n");
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}
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#endif
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// TODO(edisonn): is it better to resolve the reference at load time, or now?
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doType3Char(pdfContext, canvas, pdfContext->fPdfDoc->resolveReference(fChars[ch - fFirstChar].fObj), fFontBBox, fFonMatrix, pdfContext->fGraphicsState.fCurFontSize);
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// TODO(edisonn): verify/test translate code, not tested yet
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pdfContext->fGraphicsState.fMatrixTm.preTranslate(SkDoubleToScalar(pdfContext->fGraphicsState.fCurFontSize * fChars[ch - fFirstChar].fWidth),
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SkDoubleToScalar(0.0));
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return fChars[ch - fFirstChar].fWidth;
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}
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virtual void afterWord(SkPaint* paint, SkMatrix* matrix) {
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}
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};
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#endif // __DEFINED__SkPdfFont
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