podofo draft

experimental/PdfViewer/pdf_viewer_main.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 "SkCanvas.h"
+#include "SkDevice.h"
+#include "SkGraphics.h"
+#include "SkImageDecoder.h"
+#include "SkImageEncoder.h"
+#include "SkOSFile.h"
+#include "SkPicture.h"
+#include "SkStream.h"
+#include "SkTypeface.h"
+#include "SkTArray.h"
+#include "picture_utils.h"
+
+#ifdef SK_USE_CDB
+#include "win_dbghelp.h"
+#endif
+
+#include <iostream>
+#include <cstdio>
+#include <stack>
+
+#include "podofo.h"
+
+//#define PDF_TRACE
+//#define PDF_TRACE_DIFF_IN_PNG
+//#define PDF_DEBUG_NO_CLIPING
+//#define PDF_DEBUG_NO_PAGE_CLIPING
+//#define PDF_DEBUG_3X
+
+// TODO(edisonn): move in trace util.
+static void SkTraceMatrix(const SkMatrix& matrix, const char* sz = "") {
+#ifdef PDF_TRACE
+    printf("SkMatrix %s ", sz);
+    for (int i = 0 ; i < 9 ; i++) {
+        printf("%f ", SkScalarToDouble(matrix.get(i)));
+    }
+    printf("\n");
+#endif
+}
+
+using namespace std;
+using namespace PoDoFo;
+
+// Utilities
+static void setup_bitmap(SkBitmap* bitmap, int width, int height, SkColor color = SK_ColorWHITE) {
+    bitmap->setConfig(SkBitmap::kARGB_8888_Config, width, height);
+
+    bitmap->allocPixels();
+    bitmap->eraseColor(color);
+}
+
+// TODO(edisonn): synonyms? DeviceRGB and RGB ...
+int GetColorSpaceComponents(const std::string& colorSpace) {
+    if (colorSpace == "DeviceCMYK") {
+        return 4;
+    } else if (colorSpace == "DeviceGray" ||
+            colorSpace == "CalGray" ||
+            colorSpace == "Indexed") {
+        return 1;
+    } else if (colorSpace == "DeviceRGB" ||
+            colorSpace == "CalRGB" ||
+            colorSpace == "Lab") {
+        return 3;
+    } else {
+        return 0;
+    }
+}
+
+PdfObject* resolveReferenceObject(PdfMemDocument* pdfDoc,
+                                        PdfObject* obj,
+                                        bool resolveOneElementArrays = false) {
+    while (obj && (obj->IsReference() || (resolveOneElementArrays &&
+                                          obj->IsArray() &&
+                                          obj->GetArray().GetSize() == 1))) {
+        if (obj->IsReference()) {
+            // We need to force the non const, the only update we will do is for recurssion checks.
+            PdfReference& ref = (PdfReference&)obj->GetReference();
+            obj = pdfDoc->GetObjects().GetObject(ref);
+        } else {
+            obj = &obj->GetArray()[0];
+        }
+    }
+
+    return obj;
+}
+
+static SkMatrix SkMatrixFromPdfMatrix(double array[6]) {
+    SkMatrix matrix;
+    matrix.setAll(SkDoubleToScalar(array[0]),
+                  SkDoubleToScalar(array[2]),
+                  SkDoubleToScalar(array[4]),
+                  SkDoubleToScalar(array[1]),
+                  SkDoubleToScalar(array[3]),
+                  SkDoubleToScalar(array[5]),
+                  SkDoubleToScalar(0),
+                  SkDoubleToScalar(0),
+                  SkDoubleToScalar(1));
+
+    return matrix;
+}
+
+// TODO(edisonn): better class design.
+struct PdfColorOperator {
+    std::string fColorSpace;  // TODO(edisonn): use SkString
+    SkColor fColor;
+    // TODO(edisonn): add here other color space options.
+
+    void setRGBColor(SkColor color) {
+        // TODO(edisonn): ASSERT DeviceRGB is the color space.
+        fColor = color;
+    }
+    // TODO(edisonn): double check the default values for all fields.
+    PdfColorOperator() : fColor(SK_ColorBLACK) {}
+};
+
+// TODO(edisonn): better class design.
+struct PdfGraphicsState {
+    SkMatrix            fMatrix;
+    SkMatrix            fMatrixTm;
+    SkMatrix            fMatrixTlm;
+
+    double              fCurPosX;
+    double              fCurPosY;
+
+    double              fCurFontSize;
+    bool                fTextBlock;
+    PdfFont*            fCurFont;
+    SkPath              fPath;
+    bool                fPathClosed;
+
+    // Clip that is applied after the drawing is done!!!
+    bool                fHasClipPathToApply;
+    SkPath              fClipPath;
+
+    PdfColorOperator    fStroking;
+    PdfColorOperator    fNonStroking;
+
+    double              fLineWidth;
+    double              fTextLeading;
+    double              fWordSpace;
+    double              fCharSpace;
+
+    PdfObject*          fObjectWithResources;
+
+    PdfGraphicsState() {
+        fCurPosX      = 0.0;
+        fCurPosY      = 0.0;
+        fCurFontSize  = 0.0;
+        fTextBlock    = false;
+        fCurFont      = NULL;
+        fMatrix       = SkMatrix::I();
+        fMatrixTm     = SkMatrix::I();
+        fMatrixTlm    = SkMatrix::I();
+        fPathClosed   = true;
+        fLineWidth    = 0;
+        fTextLeading  = 0;
+        fWordSpace    = 0;
+        fCharSpace    = 0;
+        fObjectWithResources = NULL;
+        fHasClipPathToApply = false;
+    }
+};
+
+// TODO(edisonn): better class design.
+struct PdfInlineImage {
+    std::map<std::string, std::string> fKeyValuePairs;
+    std::string fImageData;
+
+};
+
+// TODO(edisonn): better class design.
+struct PdfContext {
+    std::stack<PdfVariant>          fVarStack;
+    std::stack<PdfGraphicsState>    fStateStack;
+    PdfGraphicsState                fGraphicsState;
+    PoDoFo::PdfPage*                fPdfPage;
+    PdfMemDocument*                 fPdfDoc;
+    SkMatrix                        fOriginalMatrix;
+
+    PdfInlineImage                  fInlineImage;
+
+    PdfContext() :  fPdfPage(NULL),
+                    fPdfDoc(NULL) {}
+
+};
+
+//  TODO(edisonn): temporary code, to report how much of the PDF we actually think we rendered.
+enum PdfResult {
+    kOK_PdfResult,
+    kPartial_PdfResult,
+    kNYI_PdfResult,
+    kIgnoreError_PdfResult,
+    kError_PdfResult,
+    kUnsupported_PdfResult,
+
+    kCount_PdfResult
+};
+
+struct PdfToken {
+    const char*      pszToken;
+    PdfVariant       var;
+    EPdfContentsType eType;
+
+    PdfToken() : pszToken(NULL) {}
+};
+
+PdfContext* gPdfContext = NULL;
+SkBitmap* gDumpBitmap = NULL;
+SkCanvas* gDumpCanvas = NULL;
+char gLastKeyword[100] = "";
+int gLastOpKeyword = -1;
+char allOpWithVisualEffects[100] = ",S,s,f,F,f*,B,B*,b,b*,n,Tj,TJ,\',\",d0,d1,sh,EI,Do,EX";
+int gReadOp = 0;
+
+
+
+bool hasVisualEffect(const char* pdfOp) {
+    return true;
+    if (*pdfOp == '\0') return false;
+
+    char markedPdfOp[100] = ",";
+    strcat(markedPdfOp, pdfOp);
+    strcat(markedPdfOp, ",");
+
+    return (strstr(allOpWithVisualEffects, markedPdfOp) != NULL);
+}
+
+// TODO(edisonn): Pass PdfContext and SkCanvasd only with the define for instrumentation.
+static bool readToken(PdfContentsTokenizer* fTokenizer, PdfToken* token) {
+    bool ret = fTokenizer->ReadNext(token->eType, token->pszToken, token->var);
+
+    gReadOp++;
+
+#ifdef PDF_TRACE_DIFF_IN_PNG
+    // TODO(edisonn): compare with old bitmap, and save only new bits are available, and save
+    // the numbar and name of last operation, so the file name will reflect op that changed.
+    if (hasVisualEffect(gLastKeyword)) {  // TODO(edisonn): and has dirty bits.
+        gDumpCanvas->flush();
+
+        SkBitmap bitmap;
+        setup_bitmap(&bitmap, gDumpBitmap->width(), gDumpBitmap->height());
+
+        memcpy(bitmap.getPixels(), gDumpBitmap->getPixels(), gDumpBitmap->getSize());
+
+        SkAutoTUnref<SkDevice> device(SkNEW_ARGS(SkDevice, (bitmap)));
+        SkCanvas canvas(device);
+
+        // draw context stuff here
+        SkPaint blueBorder;
+        blueBorder.setColor(SK_ColorBLUE);
+        blueBorder.setStyle(SkPaint::kStroke_Style);
+        blueBorder.setTextSize(SkDoubleToScalar(20));
+
+        SkString str;
+
+        const SkClipStack* clipStack = gDumpCanvas->getClipStack();
+        if (clipStack) {
+            SkClipStack::Iter iter(*clipStack, SkClipStack::Iter::kBottom_IterStart);
+            const SkClipStack::Element* elem;
+            double y = 0;
+            int total = 0;
+            while (elem = iter.next()) {
+                total++;
+                y += 30;
+
+                switch (elem->getType()) {
+                    case SkClipStack::Element::kRect_Type:
+                        canvas.drawRect(elem->getRect(), blueBorder);
+                        canvas.drawText("Rect Clip", strlen("Rect Clip"), SkDoubleToScalar(10), SkDoubleToScalar(y), blueBorder);
+                        break;
+                    case SkClipStack::Element::kPath_Type:
+                        canvas.drawPath(elem->getPath(), blueBorder);
+                        canvas.drawText("Path Clip", strlen("Path Clip"), SkDoubleToScalar(10), SkDoubleToScalar(y), blueBorder);
+                        break;
+                    case SkClipStack::Element::kEmpty_Type:
+                        canvas.drawText("Empty Clip!!!", strlen("Empty Clip!!!"), SkDoubleToScalar(10), SkDoubleToScalar(y), blueBorder);
+                        break;
+                    default:
+                        canvas.drawText("Unkown Clip!!!", strlen("Unkown Clip!!!"), SkDoubleToScalar(10), SkDoubleToScalar(y), blueBorder);
+                        break;
+                }
+            }
+
+            y += 30;
+            str.printf("Number of clips in stack: %i", total);
+            canvas.drawText(str.c_str(), str.size(), SkDoubleToScalar(10), SkDoubleToScalar(y), blueBorder);
+        }
+
+        const SkRegion& clipRegion = gDumpCanvas->getTotalClip();
+        SkPath clipPath;
+        if (clipRegion.getBoundaryPath(&clipPath)) {
+            SkPaint redBorder;
+            redBorder.setColor(SK_ColorRED);
+            redBorder.setStyle(SkPaint::kStroke_Style);
+            canvas.drawPath(clipPath, redBorder);
+        }
+
+        canvas.flush();
+
+        SkString out;
+
+        // TODO(edisonn): get the image, and overlay on top of it, the clip , grafic state, teh stack,
+        // ... and other properties, to be able to debug th code easily
+
+        out.appendf("/usr/local/google/home/edisonn/log_view2/step-%i-%s.png", gLastOpKeyword, gLastKeyword);
+        SkImageEncoder::EncodeFile(out.c_str(), bitmap, SkImageEncoder::kPNG_Type, 100);
+    }
+
+    if (token->eType == ePdfContentsType_Keyword) {
+        strcpy(gLastKeyword, token->pszToken);
+        gLastOpKeyword = gReadOp;
+    } else {
+        strcpy(gLastKeyword, "");
+    }
+#endif
+
+    return ret;
+}
+
+// TODO(edisonn): Document PdfTokenLooper and subclasses.
+class PdfTokenLooper {
+protected:
+    PdfTokenLooper* fParent;
+    PdfContentsTokenizer* fTokenizer;
+    PdfContext* fPdfContext;
+    SkCanvas* fCanvas;
+
+public:
+    PdfTokenLooper(PdfTokenLooper* parent,
+                   PdfContentsTokenizer* tokenizer,
+                   PdfContext* pdfContext,
+                   SkCanvas* canvas)
+        : fParent(parent), fTokenizer(tokenizer), fPdfContext(pdfContext), fCanvas(canvas) {}
+
+    virtual PdfResult consumeToken(PdfToken& token) = 0;
+    virtual void loop() = 0;
+
+    void setUp(PdfTokenLooper* parent) {
+        fParent = parent;
+        fTokenizer = parent->fTokenizer;
+        fPdfContext = parent->fPdfContext;
+        fCanvas = parent->fCanvas;
+    }
+};
+
+class PdfMainLooper : public PdfTokenLooper {
+public:
+    PdfMainLooper(PdfTokenLooper* parent,
+                  PdfContentsTokenizer* tokenizer,
+                  PdfContext* pdfContext,
+                  SkCanvas* canvas)
+        : PdfTokenLooper(parent, tokenizer, pdfContext, canvas) {}
+
+    virtual PdfResult consumeToken(PdfToken& token);
+    virtual void loop();
+};
+
+class PdfInlineImageLooper : public PdfTokenLooper {
+public:
+    PdfInlineImageLooper()
+        : PdfTokenLooper(NULL, NULL, NULL, NULL) {}
+
+    virtual PdfResult consumeToken(PdfToken& token);
+    virtual void loop();
+    PdfResult done();
+};
+
+class PdfCompatibilitySectionLooper : public PdfTokenLooper {
+public:
+    PdfCompatibilitySectionLooper()
+        : PdfTokenLooper(NULL, NULL, NULL, NULL) {}
+
+    virtual PdfResult consumeToken(PdfToken& token);
+    virtual void loop();
+};
+
+typedef PdfResult (*PdfOperatorRenderer)(PdfContext*, SkCanvas*, PdfTokenLooper**);
+
+map<std::string, PdfOperatorRenderer> gPdfOps;
+
+map<std::string, int> gRenderStats[kCount_PdfResult];
+
+char* gRenderStatsNames[kCount_PdfResult] = {
+    "Success",
+    "Partially implemented",
+    "Not yet implemented",
+    "Ignore Error",
+    "Error",
+    "Unsupported/Unknown"
+};
+
+struct SkPdfStandardFont {
+    const char* fName;
+    bool fIsBold;
+    bool fIsItalic;
+};
+
+static map<std::string, SkPdfStandardFont>& getStandardFonts() {
+    static std::map<std::string, SkPdfStandardFont> gPdfStandardFonts;
+
+    // TODO (edisonn): , vs - ? what does it mean?
+    // TODO (edisonn): MT, PS, Oblique=italic?, ... what does it mean?
+    if (gPdfStandardFonts.empty()) {
+        gPdfStandardFonts["Arial"] = {"Arial", false, false};
+        gPdfStandardFonts["Arial,Bold"] = {"Arial", true, false};
+        gPdfStandardFonts["Arial,BoldItalic"] = {"Arial", true, true};
+        gPdfStandardFonts["Arial,Italic"] = {"Arial", false, true};
+        gPdfStandardFonts["Arial-Bold"] = {"Arial", true, false};
+        gPdfStandardFonts["Arial-BoldItalic"] = {"Arial", true, true};
+        gPdfStandardFonts["Arial-BoldItalicMT"] = {"Arial", true, true};
+        gPdfStandardFonts["Arial-BoldMT"] = {"Arial", true, false};
+        gPdfStandardFonts["Arial-Italic"] = {"Arial", false, true};
+        gPdfStandardFonts["Arial-ItalicMT"] = {"Arial", false, true};
+        gPdfStandardFonts["ArialMT"] = {"Arial", false, false};
+        gPdfStandardFonts["Courier"] = {"Courier New", false, false};
+        gPdfStandardFonts["Courier,Bold"] = {"Courier New", true, false};
+        gPdfStandardFonts["Courier,BoldItalic"] = {"Courier New", true, true};
+        gPdfStandardFonts["Courier,Italic"] = {"Courier New", false, true};
+        gPdfStandardFonts["Courier-Bold"] = {"Courier New", true, false};
+        gPdfStandardFonts["Courier-BoldOblique"] = {"Courier New", true, true};
+        gPdfStandardFonts["Courier-Oblique"] = {"Courier New", false, true};
+        gPdfStandardFonts["CourierNew"] = {"Courier New", false, false};
+        gPdfStandardFonts["CourierNew,Bold"] = {"Courier New", true, false};
+        gPdfStandardFonts["CourierNew,BoldItalic"] = {"Courier New", true, true};
+        gPdfStandardFonts["CourierNew,Italic"] = {"Courier New", false, true};
+        gPdfStandardFonts["CourierNew-Bold"] = {"Courier New", true, false};
+        gPdfStandardFonts["CourierNew-BoldItalic"] = {"Courier New", true, true};
+        gPdfStandardFonts["CourierNew-Italic"] = {"Courier New", false, true};
+        gPdfStandardFonts["CourierNewPS-BoldItalicMT"] = {"Courier New", true, true};
+        gPdfStandardFonts["CourierNewPS-BoldMT"] = {"Courier New", true, false};
+        gPdfStandardFonts["CourierNewPS-ItalicMT"] = {"Courier New", false, true};
+        gPdfStandardFonts["CourierNewPSMT"] = {"Courier New", false, false};
+        gPdfStandardFonts["Helvetica"] = {"Helvetica", false, false};
+        gPdfStandardFonts["Helvetica,Bold"] = {"Helvetica", true, false};
+        gPdfStandardFonts["Helvetica,BoldItalic"] = {"Helvetica", true, true};
+        gPdfStandardFonts["Helvetica,Italic"] = {"Helvetica", false, true};
+        gPdfStandardFonts["Helvetica-Bold"] = {"Helvetica", true, false};
+        gPdfStandardFonts["Helvetica-BoldItalic"] = {"Helvetica", true, true};
+        gPdfStandardFonts["Helvetica-BoldOblique"] = {"Helvetica", true, true};
+        gPdfStandardFonts["Helvetica-Italic"] = {"Helvetica", false, true};
+        gPdfStandardFonts["Helvetica-Oblique"] = {"Helvetica", false, true};
+        gPdfStandardFonts["Times-Bold"] = {"Times", true, false};
+        gPdfStandardFonts["Times-BoldItalic"] = {"Times", true, true};
+        gPdfStandardFonts["Times-Italic"] = {"Times", false, true};
+        gPdfStandardFonts["Times-Roman"] = {"Times New Roman", false, false};
+        gPdfStandardFonts["TimesNewRoman"] = {"Times New Roman", false, false};
+        gPdfStandardFonts["TimesNewRoman,Bold"] = {"Times New Roman", true, false};
+        gPdfStandardFonts["TimesNewRoman,BoldItalic"] = {"Times New Roman", true, true};
+        gPdfStandardFonts["TimesNewRoman,Italic"] = {"Times New Roman", false, true};
+        gPdfStandardFonts["TimesNewRoman-Bold"] = {"Times New Roman", true, false};
+        gPdfStandardFonts["TimesNewRoman-BoldItalic"] = {"Times New Roman", true, true};
+        gPdfStandardFonts["TimesNewRoman-Italic"] = {"Times New Roman", false, true};
+        gPdfStandardFonts["TimesNewRomanPS"] = {"Times New Roman", false, false};
+        gPdfStandardFonts["TimesNewRomanPS-Bold"] = {"Times New Roman", true, false};
+        gPdfStandardFonts["TimesNewRomanPS-BoldItalic"] = {"Times New Roman", true, true};
+        gPdfStandardFonts["TimesNewRomanPS-BoldItalicMT"] = {"Times New Roman", true, true};
+        gPdfStandardFonts["TimesNewRomanPS-BoldMT"] = {"Times New Roman", true, false};
+        gPdfStandardFonts["TimesNewRomanPS-Italic"] = {"Times New Roman", false, true};
+        gPdfStandardFonts["TimesNewRomanPS-ItalicMT"] = {"Times New Roman", false, true};
+        gPdfStandardFonts["TimesNewRomanPSMT"] = {"Times New Roman", false, false};
+    }
+
+    return gPdfStandardFonts;
+}
+
+static SkTypeface* SkTypefaceFromPdfStandardFont(const char* fontName, bool bold, bool italic) {
+    map<std::string, SkPdfStandardFont>& standardFontMap = getStandardFonts();
+
+    if (standardFontMap.find(fontName) != standardFontMap.end()) {
+        SkPdfStandardFont fontData = standardFontMap[fontName];
+
+        // 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;
+
+        SkTypeface* typeface = SkTypeface::CreateFromName(
+            fontData.fName,
+            SkTypeface::Style((bold ? SkTypeface::kBold : 0) |
+                              (italic ? SkTypeface::kItalic : 0)));
+        if (typeface) {
+            typeface->ref();
+        }
+        return typeface;
+    }
+    return NULL;
+}
+
+static SkTypeface* SkTypefaceFromPdfFont(PdfFont* font) {
+    PdfObject* fontObject = font->GetObject();
+
+    PdfObject* pBaseFont = NULL;
+    // TODO(edisonn): warning, PoDoFo has a bug in PdfFont constructor, does not call InitVars()
+    // for now fixed locally.
+    pBaseFont = fontObject->GetIndirectKey( "BaseFont" );
+    const char* pszBaseFontName = pBaseFont->GetName().GetName().c_str();
+
+#ifdef PDF_TRACE
+    std::string str;
+    fontObject->ToString(str);
+    printf("Base Font Name: %s\n", pszBaseFontName);
+    printf("Font Object Data: %s\n", str.c_str());
+#endif
+
+    SkTypeface* typeface = SkTypefaceFromPdfStandardFont(pszBaseFontName, font->IsBold(), font->IsItalic());
+
+    if (typeface != NULL) {
+        return typeface;
+    }
+
+    char name[1000];
+    // HACK
+    strncpy(name, pszBaseFontName, 1000);
+    char* comma = strstr(name, ",");
+    char* dash = strstr(name, "-");
+    if (comma) *comma = '\0';
+    if (dash) *dash = '\0';
+
+    typeface = SkTypeface::CreateFromName(
+                name,
+                SkTypeface::Style((font->IsBold() ? SkTypeface::kBold : 0) |
+                                  (font->IsItalic() ? SkTypeface::kItalic : 0)));
+
+    if (typeface != NULL) {
+#ifdef PDF_TRACE
+    printf("HACKED FONT found %s\n", name);
+#endif
+        return typeface;
+    }
+
+#ifdef PDF_TRACE
+    printf("FONT_NOT_FOUND %s\n", pszBaseFontName);
+#endif
+
+    // TODO(edisonn): Report Warning, NYI
+    return SkTypeface::CreateFromName(
+                "Times New Roman",
+                SkTypeface::Style((font->IsBold() ? SkTypeface::kBold : 0) |
+                                  (font->IsItalic() ? SkTypeface::kItalic : 0)));
+}
+
+PdfResult DrawText(PdfContext* pdfContext,
+                   PdfFont* fCurFont,
+                   const PdfString& rString,
+                   SkCanvas* canvas)
+{
+    if (!fCurFont)
+    {
+        // TODO(edisonn): ignore the error, use the default font?
+        return kError_PdfResult;
+    }
+
+    PdfEncoding* enc = fCurFont->GetEncoding();
+    if (!enc)
+    {
+        // TODO(edisonn): Can we recover from this error?
+        return kError_PdfResult;
+    }
+
+    if (!enc->IsResolved()) {
+        if (fCurFont->GetObject()->IsDictionary() && fCurFont->GetObject()->GetDictionary().HasKey(PdfName("ToUnicode"))) {
+            enc = new PdfCMapEncoding(
+                    fCurFont->GetObject(),
+                    resolveReferenceObject(pdfContext->fPdfDoc,
+                                           fCurFont->GetObject()->GetDictionary().GetKey(PdfName("ToUnicode"))),
+                    PdfCMapEncoding::eBaseEncoding_Identity);  // todo, read the base encoding
+            fCurFont->SetEncoding(enc);
+        }
+    }
+
+    PdfString r2 = rString;
+    PdfString unicode;
+
+    if (enc->IsResolved()) {  // TODO(edisonn): and is Identity-H
+        r2.forceToUnicode();
+    }
+
+    unicode = fCurFont->GetEncoding()->ConvertToUnicode( r2, fCurFont );
+
+#ifdef PDF_TRACE
+    printf("%i %i ? %c rString.len = %i\n", (int)rString.GetString()[0], (int)rString.GetString()[1], (int)rString.GetString()[1], rString.GetLength());
+    printf("%i %i %i %i %c unicode.len = %i\n", (int)unicode.GetString()[0], (int)unicode.GetString()[1], (int)unicode.GetString()[2], (int)unicode.GetString()[3], (int)unicode.GetString()[0], unicode.GetLength());
+#endif
+
+    SkPaint paint;
+    // TODO(edisonn): when should fCurFont->GetFontSize() used? When cur is fCurFontSize == 0?
+    // Or maybe just not call setTextSize at all?
+    if (pdfContext->fGraphicsState.fCurFontSize != 0) {
+        paint.setTextSize(SkDoubleToScalar(pdfContext->fGraphicsState.fCurFontSize));
+    }
+    if (fCurFont->GetFontScale() != 0) {
+        paint.setTextScaleX(SkFloatToScalar(fCurFont->GetFontScale() / 100.0));
+    }
+    paint.setColor(pdfContext->fGraphicsState.fNonStroking.fColor);
+
+    paint.setTypeface(SkTypefaceFromPdfFont(fCurFont));
+
+    paint.setAntiAlias(true);
+    // TODO(edisonn): paint.setStyle(...);
+
+    canvas->save();
+    SkMatrix matrix = pdfContext->fGraphicsState.fMatrixTm;
+
+#if 0
+    // Reverse now the space, otherwise the text is upside down.
+    SkScalar z = SkIntToScalar(0);
+    SkScalar one = SkIntToScalar(1);
+
+    SkPoint normalSpace1[4] = {SkPoint::Make(z, z), SkPoint::Make(one, z), SkPoint::Make(one, one), SkPoint::Make(z, one)};
+    SkPoint mirrorSpace1[4];
+    pdfContext->fGraphicsState.fMatrixTm.mapPoints(mirrorSpace1, normalSpace1, 4);
+
+    SkPoint normalSpace2[4] = {SkPoint::Make(z, z), SkPoint::Make(one, z), SkPoint::Make(one, -one), SkPoint::Make(z, -one)};
+    SkPoint mirrorSpace2[4];
+    pdfContext->fGraphicsState.fMatrixTm.mapPoints(mirrorSpace2, normalSpace2, 4);
+
+#ifdef PDF_TRACE
+    printf("mirror1[0], x = %f y = %f\n", SkScalarToDouble(mirrorSpace1[0].x()), SkScalarToDouble(mirrorSpace1[0].y()));
+    printf("mirror1[1], x = %f y = %f\n", SkScalarToDouble(mirrorSpace1[1].x()), SkScalarToDouble(mirrorSpace1[1].y()));
+    printf("mirror1[2], x = %f y = %f\n", SkScalarToDouble(mirrorSpace1[2].x()), SkScalarToDouble(mirrorSpace1[2].y()));
+    printf("mirror1[3], x = %f y = %f\n", SkScalarToDouble(mirrorSpace1[3].x()), SkScalarToDouble(mirrorSpace1[3].y()));
+    printf("mirror2[0], x = %f y = %f\n", SkScalarToDouble(mirrorSpace2[0].x()), SkScalarToDouble(mirrorSpace2[0].y()));
+    printf("mirror2[1], x = %f y = %f\n", SkScalarToDouble(mirrorSpace2[1].x()), SkScalarToDouble(mirrorSpace2[1].y()));
+    printf("mirror2[2], x = %f y = %f\n", SkScalarToDouble(mirrorSpace2[2].x()), SkScalarToDouble(mirrorSpace2[2].y()));
+    printf("mirror2[3], x = %f y = %f\n", SkScalarToDouble(mirrorSpace2[3].x()), SkScalarToDouble(mirrorSpace2[3].y()));
+#endif
+
+    SkMatrix mirror;
+    SkASSERT(mirror.setPolyToPoly(mirrorSpace1, mirrorSpace2, 4));
+
+    // TODO(edisonn): text positioning wrong right now. Need to get matrix operations right.
+    matrix.preConcat(mirror);
+    canvas->setMatrix(matrix);
+#endif
+
+    SkPoint point1;
+    pdfContext->fGraphicsState.fMatrixTm.mapXY(SkIntToScalar(0), SkIntToScalar(0), &point1);
+
+    SkMatrix mirror;
+    mirror.setTranslate(0, -point1.y());
+    // TODO(edisonn): fix rotated text, and skewed too
+    mirror.postScale(SK_Scalar1, -SK_Scalar1);
+    // TODO(edisonn): post rotate, skew
+    mirror.postTranslate(0, point1.y());
+
+    matrix.postConcat(mirror);
+
+    canvas->setMatrix(matrix);
+
+    SkTraceMatrix(matrix, "mirrored");
+
+#ifdef PDF_TRACE
+    SkPoint point;
+    pdfContext->fGraphicsState.fMatrixTm.mapXY(SkDoubleToScalar(0), SkDoubleToScalar(0), &point);
+    printf("Original SkCanvas resolved coordinates, x = %f y = %f\n", SkScalarToDouble(point.x()), SkScalarToDouble(point.y()));
+    matrix.mapXY(SkDoubleToScalar(0), SkDoubleToScalar(0), &point);
+    printf("Mirored SkCanvas resolved coordinates, x = %f y = %f\n", SkScalarToDouble(point.x()), SkScalarToDouble(point.y()));
+#endif
+
+    // TODO(edisonn): remove this call once we load the font properly
+    // The extra * will show that we got at least the text positioning right
+    // even if font failed to be loaded
+//    canvas->drawText(".", 1, SkDoubleToScalar(-5.0), SkDoubleToScalar(0.0), paint);
+
+
+
+    // TODO(edisonn): use character and word spacing .. add utility function
+    if (enc->IsResolved()) {
+        paint.setTextEncoding(SkPaint::kUTF16_TextEncoding);
+        SkScalar textWidth = paint.measureText(unicode.GetString(), unicode.GetLength());
+        pdfContext->fGraphicsState.fMatrixTm.preTranslate(textWidth, SkDoubleToScalar(0.0));
+        canvas->drawText(unicode.GetString(), unicode.GetLength(), SkDoubleToScalar(0.0), SkDoubleToScalar(0.0), paint);
+    }
+    else {
+        paint.setTextEncoding(SkPaint::kUTF8_TextEncoding);
+        SkScalar textWidth = paint.measureText(unicode.GetStringUtf8().c_str(), strlen(unicode.GetStringUtf8().c_str()));
+        pdfContext->fGraphicsState.fMatrixTm.preTranslate(textWidth, SkDoubleToScalar(0.0));
+        canvas->drawText(unicode.GetStringUtf8().c_str(), strlen(unicode.GetStringUtf8().c_str()), SkDoubleToScalar(0.0), SkDoubleToScalar(0.0), paint);
+    }
+
+//    paint.setTextEncoding(SkPaint::kUTF8_TextEncoding);
+//    unsigned char ch = *(unicode.GetString() + 3);
+//    if ((ch & 0xC0) != 0x80 && ch < 0x80) {
+//        printf("x%i", ch);
+//        SkScalar textWidth = paint.measureText(&ch, 1);
+//        pdfContext->fGraphicsState.fMatrixTm.preTranslate(textWidth, SkDoubleToScalar(0.0));
+//        canvas->drawText(&ch, 1, SkDoubleToScalar(0.0), SkDoubleToScalar(0.0), paint);
+//    }
+
+    canvas->restore();
+
+
+    return kPartial_PdfResult;
+}
+
+// TODO(edisonn): create header files with declarations!
+PdfResult PdfOp_q(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper);
+PdfResult PdfOp_Q(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper);
+PdfResult PdfOp_Tw(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper);
+PdfResult PdfOp_Tc(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper);
+
+// TODO(edisonn): deal with synonyms (/BPC == /BitsPerComponent), here or in GetKey?
+// Always pass long form in key, and have a map of long -> short key
+bool LongFromDictionary(PdfContext* pdfContext,
+                        PdfDictionary& dict,
+                        const char* key,
+                        long* data) {
+    PdfObject* value = resolveReferenceObject(pdfContext->fPdfDoc,
+                                                    dict.GetKey(PdfName(key)));
+
+    if (value == NULL || !value->IsNumber()) {
+        return false;
+    }
+
+    *data = value->GetNumber();
+    return true;
+}
+
+bool BoolFromDictionary(PdfContext* pdfContext,
+                        PdfDictionary& dict,
+                        const char* key,
+                        bool* data) {
+    PdfObject* value = resolveReferenceObject(pdfContext->fPdfDoc,
+                                                    dict.GetKey(PdfName(key)));
+
+    if (value == NULL || !value->IsBool()) {
+        return false;
+    }
+
+    *data = value->GetBool();
+    return true;
+}
+
+bool NameFromDictionary(PdfContext* pdfContext,
+                        PdfDictionary& dict,
+                        const char* key,
+                        std::string* data) {
+    PdfObject* value = resolveReferenceObject(pdfContext->fPdfDoc,
+                                                    dict.GetKey(PdfName(key)),
+                                                    true);
+    if (value == NULL || !value->IsName()) {
+        return false;
+    }
+
+    *data = value->GetName().GetName();
+    return true;
+}
+
+// TODO(edisonn): perf!!!
+bool transferImageStreamToARGB(unsigned char* uncompressedStream, pdf_long uncompressedStreamLength,
+                               int width, int bytesPerLine,
+                               int bpc, const std::string& colorSpace,
+                               SkColor** uncompressedStreamArgb,
+                               pdf_long* uncompressedStreamLengthInBytesArgb) {
+    int components = GetColorSpaceComponents(colorSpace);
+//#define MAX_COMPONENTS 10
+
+    int bitsPerLine = width * components * bpc;
+    // TODO(edisonn): assume start of lines are aligned at 32 bits?
+    int height = uncompressedStreamLength / bytesPerLine;
+
+    // minimal support for now
+    if ((colorSpace == "DeviceRGB" || colorSpace == "RGB") && bpc == 8) {
+        *uncompressedStreamLengthInBytesArgb = width * height * 4;
+        *uncompressedStreamArgb = (SkColor*)malloc(*uncompressedStreamLengthInBytesArgb);
+
+        for (int h = 0 ; h < height; h++) {
+            long i = width * (height - 1 - h);
+            for (int w = 0 ; w < width; w++) {
+                (*uncompressedStreamArgb)[i] = SkColorSetRGB(uncompressedStream[3 * w],
+                                                             uncompressedStream[3 * w + 1],
+                                                             uncompressedStream[3 * w + 2]);
+                i++;
+            }
+            uncompressedStream += bytesPerLine;
+        }
+        return true;
+    }
+/*
+    if ((colorSpace == "DeviceGray" || colorSpace == "Gray") && bpc == 8) {
+        *uncompressedStreamLengthInBytesArgb = width * height * 4;
+        *uncompressedStreamArgb = (SkColor*)malloc(*uncompressedStreamLengthInBytesArgb);
+
+        int i = 0;
+        for (int h = 0 ; h < height; h++) {
+            for (int w = 0 ; w < width; w++) {
+                (*uncompressedStreamArgb)[i] = SkColorSetRGB(uncompressedStream[w],
+                                                             uncompressedStream[w],
+                                                             uncompressedStream[w]);
+                i++;
+            }
+            uncompressedStream += bytesPerLine;
+        }
+        return true;
+    }
+*/
+    return false;
+}
+
+// utils
+PdfResult doXObject_Image(PdfContext* pdfContext, SkCanvas* canvas, PdfObject& obj) {
+    if (!obj.HasStream() || obj.GetStream() == NULL || obj.GetStream()->GetLength() == 0 ||
+        !obj.IsDictionary()) {
+        return kIgnoreError_PdfResult;
+    }
+
+
+    PdfObject* sMask = resolveReferenceObject(pdfContext->fPdfDoc,
+                                              obj.GetDictionary().GetKey(PdfName("SMask")));
+
+#ifdef PDF_TRACE
+    std::string str;
+    if (sMask) {
+        sMask->ToString(str);
+        printf("/SMask of /Subtype /Image: %s\n", str.c_str());
+    }
+#endif
+
+    PdfObject* value = resolveReferenceObject(pdfContext->fPdfDoc,
+                                              obj.GetDictionary().GetKey(PdfName("Filter")));
+
+    if (value && value->IsArray() && value->GetArray().GetSize() == 1) {
+        value = resolveReferenceObject(pdfContext->fPdfDoc,
+                                       &value->GetArray()[0]);
+    }
+
+    // TODO (edisonn): Fast Jpeg(DCTDecode) draw, or fast PNG(FlateDecode) draw ...
+//    if (value && value->IsName() && value->GetName().GetName() == "DCTDecode") {
+//        SkStream stream = SkStream::
+//        SkImageDecoder::Factory()
+//    }
+
+    // Get color space
+    // trasnlate
+
+    long bpc = 0;
+    LongFromDictionary(pdfContext, obj.GetDictionary(), "BitsPerComponent", &bpc);
+
+    bool imageMask = false;
+    BoolFromDictionary(pdfContext, obj.GetDictionary(), "ImageMask", &imageMask);
+
+    if (imageMask) {
+        if (bpc != 0 && bpc != 1) {
+            return kIgnoreError_PdfResult;
+        }
+        bpc = 1;
+    }
+
+    long width;
+    if (!LongFromDictionary(pdfContext, obj.GetDictionary(), "Width", &width)) {
+        return kIgnoreError_PdfResult;
+    }
+
+    long height;
+    if (!LongFromDictionary(pdfContext, obj.GetDictionary(), "Height", &height)) {
+        return kIgnoreError_PdfResult;
+    }
+
+    std::string colorSpace;  // TODO(edisonn): load others than names, for more complicated
+    if (!NameFromDictionary(pdfContext, obj.GetDictionary(), "ColorSpace", &colorSpace)) {
+        return kIgnoreError_PdfResult;
+    }
+
+    char* uncompressedStream = NULL;
+    pdf_long uncompressedStreamLength = 0;
+
+    PdfResult ret = kPartial_PdfResult;
+    // TODO(edisonn): get rid of try/catch exceptions! We should not throw on user data!
+    try {
+        obj.GetStream()->GetFilteredCopy(&uncompressedStream, &uncompressedStreamLength);
+    } catch (PdfError& e) {
+        return kIgnoreError_PdfResult;
+    }
+
+    SkColor* uncompressedStreamArgb = NULL;
+    pdf_long uncompressedStreamLengthInBytesArgb = 0;
+
+    int bytesPerLine = uncompressedStreamLength / height;
+#ifdef PDF_TRACE
+    if (uncompressedStreamLength % height != 0) {
+        printf("Warning uncompressedStreamLength % height != 0 !!!\n");
+    }
+#endif
+
+    if (!transferImageStreamToARGB((unsigned char*)uncompressedStream, uncompressedStreamLength,
+                                   width, bytesPerLine,
+                                   bpc, colorSpace,
+                                   &uncompressedStreamArgb,
+                                   &uncompressedStreamLengthInBytesArgb)) {
+        free(uncompressedStream);  // TODO(edisonn): avoid freeing the stream in 2 places!
+        return kIgnoreError_PdfResult;
+    }
+    free(uncompressedStream);
+
+    SkBitmap::Config config = SkBitmap::kARGB_8888_Config;
+
+    SkBitmap bitmap;
+    bitmap.setConfig(config, width, height);
+    bitmap.setPixels(uncompressedStreamArgb);
+
+    canvas->save();
+    canvas->setMatrix(pdfContext->fGraphicsState.fMatrix);
+    SkRect dst = SkRect::MakeXYWH(SkDoubleToScalar(0.0), SkDoubleToScalar(0.0), SkDoubleToScalar(1.0), SkDoubleToScalar(1.0));
+    canvas->drawBitmapRect(bitmap, dst, NULL);
+    canvas->restore();
+
+    return kPartial_PdfResult;
+}
+
+bool SkMatrixFromDictionary(PdfContext* pdfContext,
+                            PdfDictionary& dict,
+                            const char* key,
+                            SkMatrix* matrix) {
+    PdfObject* value = resolveReferenceObject(pdfContext->fPdfDoc,
+                                                    dict.GetKey(PdfName(key)));
+
+    if (value == NULL || !value->IsArray()) {
+        return false;
+    }
+
+    if (value->GetArray().GetSize() != 6) {
+        return false;
+    }
+
+    double array[6];
+    for (int i = 0; i < 6; i++) {
+        PdfObject* elem = resolveReferenceObject(pdfContext->fPdfDoc, &value->GetArray()[i]);
+        if (elem == NULL || (!elem->IsReal() && !elem->IsNumber())) {
+            return false;
+        }
+        array[i] = elem->GetReal();
+    }
+
+    *matrix = SkMatrixFromPdfMatrix(array);
+    return true;
+}
+
+bool SkRectFromDictionary(PdfContext* pdfContext,
+                          PdfDictionary& dict,
+                          const char* key,
+                          SkRect* rect) {
+    PdfObject* value = resolveReferenceObject(pdfContext->fPdfDoc,
+                                                    dict.GetKey(PdfName(key)));
+
+    if (value == NULL || !value->IsArray()) {
+        return false;
+    }
+
+    if (value->GetArray().GetSize() != 4) {
+        return false;
+    }
+
+    double array[4];
+    for (int i = 0; i < 4; i++) {
+        PdfObject* elem = resolveReferenceObject(pdfContext->fPdfDoc, &value->GetArray()[i]);
+        if (elem == NULL || (!elem->IsReal() && !elem->IsNumber())) {
+            return false;
+        }
+        array[i] = elem->GetReal();
+    }
+
+    *rect = SkRect::MakeLTRB(SkDoubleToScalar(array[0]),
+                             SkDoubleToScalar(array[1]),
+                             SkDoubleToScalar(array[2]),
+                             SkDoubleToScalar(array[3]));
+    return true;
+}
+
+PdfResult doXObject_Form(PdfContext* pdfContext, SkCanvas* canvas, PdfObject& obj) {
+    if (!obj.HasStream() || obj.GetStream() == NULL || obj.GetStream()->GetLength() == 0) {
+        return kOK_PdfResult;
+    }
+
+    PdfOp_q(pdfContext, canvas, NULL);
+    canvas->save();
+
+    pdfContext->fGraphicsState.fObjectWithResources = &obj;
+
+    SkTraceMatrix(pdfContext->fGraphicsState.fMatrix, "Current matrix");
+
+    SkMatrix matrix;
+    if (SkMatrixFromDictionary(pdfContext, obj.GetDictionary(), "Matrix", &matrix)) {
+        pdfContext->fGraphicsState.fMatrix.preConcat(matrix);
+        pdfContext->fGraphicsState.fMatrixTm = pdfContext->fGraphicsState.fMatrix;
+        pdfContext->fGraphicsState.fMatrixTlm = pdfContext->fGraphicsState.fMatrix;
+        // TODO(edisonn) reset matrixTm and matricTlm also?
+    }
+
+    SkTraceMatrix(pdfContext->fGraphicsState.fMatrix, "Total matrix");
+
+    canvas->setMatrix(pdfContext->fGraphicsState.fMatrix);
+
+    SkRect bbox;
+    if (SkRectFromDictionary(pdfContext, obj.GetDictionary(), "BBox", &bbox)) {
+        canvas->clipRect(bbox, SkRegion::kIntersect_Op, true);  // TODO(edisonn): AA from settings.
+    }
+
+    // TODO(edisonn): iterate smart on the stream even if it is compressed, tokenize it as we go.
+    // For this PdfContentsTokenizer needs to be extended.
+
+    char* uncompressedStream = NULL;
+    pdf_long uncompressedStreamLength = 0;
+
+    PdfResult ret = kPartial_PdfResult;
+
+    // TODO(edisonn): get rid of try/catch exceptions! We should not throw on user data!
+    try {
+        obj.GetStream()->GetFilteredCopy(&uncompressedStream, &uncompressedStreamLength);
+        if (uncompressedStream != NULL && uncompressedStreamLength != 0) {
+            PdfContentsTokenizer tokenizer(uncompressedStream, uncompressedStreamLength);
+            PdfMainLooper looper(NULL, &tokenizer, pdfContext, canvas);
+            looper.loop();
+        }
+        free(uncompressedStream);
+    } catch (PdfError& e) {
+        ret = kIgnoreError_PdfResult;
+    }
+
+    // TODO(edisonn): should we restore the variable stack at the same state?
+    // There could be operands left, that could be consumed by a parent tokenizer when we pop.
+    canvas->restore();
+    PdfOp_Q(pdfContext, canvas, NULL);
+    return ret;
+}
+
+PdfResult doXObject_PS(PdfContext* pdfContext, SkCanvas* canvas, PdfObject& obj) {
+    return kNYI_PdfResult;
+}
+
+class CheckRecursiveRendering {
+    PdfObject& fObj;
+public:
+    CheckRecursiveRendering(PdfObject& obj) : fObj(obj) {
+        fObj.fInRendering = true;
+    }
+
+    ~CheckRecursiveRendering() {
+        SkASSERT(fObj.fInRendering);
+        fObj.fInRendering = false;
+    }
+};
+
+PdfResult doXObject(PdfContext* pdfContext, SkCanvas* canvas, PdfObject& obj) {
+    if (obj.fInRendering) {
+        // Oops, corrupt PDF!
+        return kIgnoreError_PdfResult;
+    }
+
+    CheckRecursiveRendering checkRecursion(obj);
+
+    if (!obj.IsDictionary()) {
+        return kIgnoreError_PdfResult;
+    }
+
+    PdfObject* type = resolveReferenceObject(pdfContext->fPdfDoc,
+                                                   obj.GetDictionary().GetKey(PdfName("Type")));
+
+    if (type == NULL || !type->IsName()) {
+        return kIgnoreError_PdfResult;
+    }
+
+    if (type->GetName().GetName() != "XObject") {
+        return kIgnoreError_PdfResult;
+    }
+
+    PdfObject* subtype =
+            resolveReferenceObject(pdfContext->fPdfDoc,
+                                   obj.GetDictionary().GetKey(PdfName("Subtype")));
+
+    if (subtype == NULL || !subtype->IsName()) {
+        return kIgnoreError_PdfResult;
+    }
+
+    if (subtype->GetName().GetName() == "Image") {
+        return doXObject_Image(pdfContext, canvas, obj);
+    } else if (subtype->GetName().GetName() == "Form") {
+        return doXObject_Form(pdfContext, canvas, obj);
+    } else if (subtype->GetName().GetName() == "PS") {
+        return doXObject_PS(pdfContext, canvas, obj);
+    }
+    return kIgnoreError_PdfResult;
+}
+
+PdfResult PdfOp_q(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    pdfContext->fStateStack.push(pdfContext->fGraphicsState);
+    canvas->save();
+    return kOK_PdfResult;
+}
+
+PdfResult PdfOp_Q(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    pdfContext->fGraphicsState = pdfContext->fStateStack.top();
+    pdfContext->fStateStack.pop();
+    canvas->restore();
+    return kOK_PdfResult;
+}
+
+PdfResult PdfOp_cm(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    double array[6];
+    for (int i = 0 ; i < 6 ; i++) {
+        array[5 - i] = pdfContext->fVarStack.top().GetReal();
+        pdfContext->fVarStack.pop();
+    }
+
+    // a b
+    // c d
+    // e f
+
+    // 0 1
+    // 2 3
+    // 4 5
+
+    // sx ky
+    // kx sy
+    // tx ty
+    SkMatrix matrix = SkMatrixFromPdfMatrix(array);
+
+    pdfContext->fGraphicsState.fMatrix.preConcat(matrix);
+
+#ifdef PDF_TRACE
+    printf("cm ");
+    for (int i = 0 ; i < 6 ; i++) {
+        printf("%f ", array[i]);
+    }
+    printf("\n");
+    SkTraceMatrix(pdfContext->fGraphicsState.fMatrix);
+#endif
+
+    return kOK_PdfResult;
+}
+
+//leading TL Set the text leading, Tl
+//, to leading, which is a number expressed in unscaled text
+//space units. Text leading is used only by the T*, ', and " operators. Initial value: 0.
+PdfResult PdfOp_TL(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    double ty = pdfContext->fVarStack.top().GetReal(); pdfContext->fVarStack.pop();
+
+    pdfContext->fGraphicsState.fTextLeading = ty;
+
+    return kOK_PdfResult;
+}
+
+PdfResult PdfOp_Td(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    double ty = pdfContext->fVarStack.top().GetReal(); pdfContext->fVarStack.pop();
+    double tx = pdfContext->fVarStack.top().GetReal(); pdfContext->fVarStack.pop();
+
+    double array[6] = {1, 0, 0, 1, tx, ty};
+    SkMatrix matrix = SkMatrixFromPdfMatrix(array);
+
+    pdfContext->fGraphicsState.fMatrixTm.preConcat(matrix);
+    pdfContext->fGraphicsState.fMatrixTlm.preConcat(matrix);
+
+    return kPartial_PdfResult;
+}
+
+PdfResult PdfOp_TD(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    double ty = pdfContext->fVarStack.top().GetReal(); pdfContext->fVarStack.pop();
+    double tx = pdfContext->fVarStack.top().GetReal(); pdfContext->fVarStack.pop();
+
+    PdfVariant _ty(-ty);
+    pdfContext->fVarStack.push(_ty);
+    PdfOp_TL(pdfContext, canvas, looper);
+
+    PdfVariant vtx(tx);
+    PdfVariant vty(ty);
+    pdfContext->fVarStack.push(vtx);
+    pdfContext->fVarStack.push(vty);
+    return PdfOp_Td(pdfContext, canvas, looper);
+}
+
+PdfResult PdfOp_Tm(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    double f = pdfContext->fVarStack.top().GetReal(); pdfContext->fVarStack.pop();
+    double e = pdfContext->fVarStack.top().GetReal(); pdfContext->fVarStack.pop();
+    double d = pdfContext->fVarStack.top().GetReal(); pdfContext->fVarStack.pop();
+    double c = pdfContext->fVarStack.top().GetReal(); pdfContext->fVarStack.pop();
+    double b = pdfContext->fVarStack.top().GetReal(); pdfContext->fVarStack.pop();
+    double a = pdfContext->fVarStack.top().GetReal(); pdfContext->fVarStack.pop();
+
+    double array[6];
+    array[0] = a;
+    array[1] = b;
+    array[2] = c;
+    array[3] = d;
+    array[4] = e;
+    array[5] = f;
+
+    SkMatrix matrix = SkMatrixFromPdfMatrix(array);
+    matrix.postConcat(pdfContext->fGraphicsState.fMatrix);
+
+    // TODO(edisonn): Text positioning.
+    pdfContext->fGraphicsState.fMatrixTm = matrix;
+    pdfContext->fGraphicsState.fMatrixTlm = matrix;;
+
+    return kPartial_PdfResult;
+}
+
+//— T* Move to the start of the next line. This operator has the same effect as the code
+//0 Tl Td
+//where Tl is the current leading parameter in the text state
+PdfResult PdfOp_T_star(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    PdfVariant zero(0.0);
+    PdfVariant tl(pdfContext->fGraphicsState.fTextLeading);
+
+    pdfContext->fVarStack.push(zero);
+    pdfContext->fVarStack.push(tl);
+    return PdfOp_Td(pdfContext, canvas, looper);
+}
+
+PdfResult PdfOp_m(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    if (pdfContext->fGraphicsState.fPathClosed) {
+        pdfContext->fGraphicsState.fPath.reset();
+        pdfContext->fGraphicsState.fPathClosed = false;
+    }
+
+    pdfContext->fGraphicsState.fCurPosY = pdfContext->fVarStack.top().GetReal();    pdfContext->fVarStack.pop();
+    pdfContext->fGraphicsState.fCurPosX = pdfContext->fVarStack.top().GetReal();    pdfContext->fVarStack.pop();
+
+    pdfContext->fGraphicsState.fPath.moveTo(SkDoubleToScalar(pdfContext->fGraphicsState.fCurPosX),
+                                          SkDoubleToScalar(pdfContext->fGraphicsState.fCurPosY));
+
+    return kOK_PdfResult;
+}
+
+PdfResult PdfOp_l(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    if (pdfContext->fGraphicsState.fPathClosed) {
+        pdfContext->fGraphicsState.fPath.reset();
+        pdfContext->fGraphicsState.fPathClosed = false;
+    }
+
+    pdfContext->fGraphicsState.fCurPosY = pdfContext->fVarStack.top().GetReal();    pdfContext->fVarStack.pop();
+    pdfContext->fGraphicsState.fCurPosX = pdfContext->fVarStack.top().GetReal();    pdfContext->fVarStack.pop();
+
+    pdfContext->fGraphicsState.fPath.lineTo(SkDoubleToScalar(pdfContext->fGraphicsState.fCurPosX),
+                                          SkDoubleToScalar(pdfContext->fGraphicsState.fCurPosY));
+
+    return kOK_PdfResult;
+}
+
+PdfResult PdfOp_c(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    if (pdfContext->fGraphicsState.fPathClosed) {
+        pdfContext->fGraphicsState.fPath.reset();
+        pdfContext->fGraphicsState.fPathClosed = false;
+    }
+
+    double y3 = pdfContext->fVarStack.top().GetReal();    pdfContext->fVarStack.pop();
+    double x3 = pdfContext->fVarStack.top().GetReal();    pdfContext->fVarStack.pop();
+    double y2 = pdfContext->fVarStack.top().GetReal();    pdfContext->fVarStack.pop();
+    double x2 = pdfContext->fVarStack.top().GetReal();    pdfContext->fVarStack.pop();
+    double y1 = pdfContext->fVarStack.top().GetReal();    pdfContext->fVarStack.pop();
+    double x1 = pdfContext->fVarStack.top().GetReal();    pdfContext->fVarStack.pop();
+
+    pdfContext->fGraphicsState.fPath.cubicTo(SkDoubleToScalar(x1), SkDoubleToScalar(y1),
+                                            SkDoubleToScalar(x2), SkDoubleToScalar(y2),
+                                            SkDoubleToScalar(x3), SkDoubleToScalar(y3));
+
+    pdfContext->fGraphicsState.fCurPosX = x3;
+    pdfContext->fGraphicsState.fCurPosY = y3;
+
+    return kOK_PdfResult;
+}
+
+PdfResult PdfOp_v(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    if (pdfContext->fGraphicsState.fPathClosed) {
+        pdfContext->fGraphicsState.fPath.reset();
+        pdfContext->fGraphicsState.fPathClosed = false;
+    }
+
+    double y3 = pdfContext->fVarStack.top().GetReal();    pdfContext->fVarStack.pop();
+    double x3 = pdfContext->fVarStack.top().GetReal();    pdfContext->fVarStack.pop();
+    double y2 = pdfContext->fVarStack.top().GetReal();    pdfContext->fVarStack.pop();
+    double x2 = pdfContext->fVarStack.top().GetReal();    pdfContext->fVarStack.pop();
+    double y1 = pdfContext->fGraphicsState.fCurPosY;
+    double x1 = pdfContext->fGraphicsState.fCurPosX;
+
+    pdfContext->fGraphicsState.fPath.cubicTo(SkDoubleToScalar(x1), SkDoubleToScalar(y1),
+                                            SkDoubleToScalar(x2), SkDoubleToScalar(y2),
+                                            SkDoubleToScalar(x3), SkDoubleToScalar(y3));
+
+    pdfContext->fGraphicsState.fCurPosX = x3;
+    pdfContext->fGraphicsState.fCurPosY = y3;
+
+    return kOK_PdfResult;
+}
+
+PdfResult PdfOp_y(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    if (pdfContext->fGraphicsState.fPathClosed) {
+        pdfContext->fGraphicsState.fPath.reset();
+        pdfContext->fGraphicsState.fPathClosed = false;
+    }
+
+    double y3 = pdfContext->fVarStack.top().GetReal();    pdfContext->fVarStack.pop();
+    double x3 = pdfContext->fVarStack.top().GetReal();    pdfContext->fVarStack.pop();
+    double y2 = pdfContext->fGraphicsState.fCurPosY;
+    double x2 = pdfContext->fGraphicsState.fCurPosX;
+    double y1 = pdfContext->fVarStack.top().GetReal();    pdfContext->fVarStack.pop();
+    double x1 = pdfContext->fVarStack.top().GetReal();    pdfContext->fVarStack.pop();
+
+    pdfContext->fGraphicsState.fPath.cubicTo(SkDoubleToScalar(x1), SkDoubleToScalar(y1),
+                                            SkDoubleToScalar(x2), SkDoubleToScalar(y2),
+                                            SkDoubleToScalar(x3), SkDoubleToScalar(y3));
+
+    pdfContext->fGraphicsState.fCurPosX = x3;
+    pdfContext->fGraphicsState.fCurPosY = y3;
+
+    return kOK_PdfResult;
+}
+
+PdfResult PdfOp_re(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    if (pdfContext->fGraphicsState.fPathClosed) {
+        pdfContext->fGraphicsState.fPath.reset();
+        pdfContext->fGraphicsState.fPathClosed = false;
+    }
+
+    double height = pdfContext->fVarStack.top().GetReal();      pdfContext->fVarStack.pop();
+    double width = pdfContext->fVarStack.top().GetReal();       pdfContext->fVarStack.pop();
+    double y = pdfContext->fVarStack.top().GetReal();           pdfContext->fVarStack.pop();
+    double x = pdfContext->fVarStack.top().GetReal();           pdfContext->fVarStack.pop();
+
+    pdfContext->fGraphicsState.fPath.addRect(SkDoubleToScalar(x), SkDoubleToScalar(y),
+                                           SkDoubleToScalar(x + width), SkDoubleToScalar(y + height));
+
+    pdfContext->fGraphicsState.fCurPosX = x;
+    pdfContext->fGraphicsState.fCurPosY = y + height;
+
+    return kOK_PdfResult;
+}
+
+PdfResult PdfOp_h(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    pdfContext->fGraphicsState.fPath.close();
+    pdfContext->fGraphicsState.fPathClosed = true;
+    return kOK_PdfResult;
+}
+
+PdfResult PdfOp_fillAndStroke(PdfContext* pdfContext, SkCanvas* canvas, bool fill, bool stroke, bool close, bool evenOdd) {
+    SkPath path = pdfContext->fGraphicsState.fPath;
+
+    if (close) {
+        path.close();
+    }
+
+    canvas->setMatrix(pdfContext->fGraphicsState.fMatrix);
+
+    SkPaint paint;
+
+    // TODO(edisonn): get this from pdfContext->options,
+    // or pdfContext->addPaintOptions(&paint);
+    paint.setAntiAlias(true);
+
+    // TODO(edisonn): dashing, miter, ...
+
+//    path.transform(pdfContext->fGraphicsState.fMatrix);
+//    path.transform(pdfContext->fOriginalMatrix);
+
+    SkPoint line[2];
+    if (fill && !stroke && path.isLine(line)) {
+        paint.setStyle(SkPaint::kStroke_Style);
+        paint.setColor(pdfContext->fGraphicsState.fNonStroking.fColor);
+        paint.setStrokeWidth(SkDoubleToScalar(0));
+        canvas->drawPath(path, paint);
+    } else {
+        if (fill) {
+            paint.setStyle(SkPaint::kFill_Style);
+            if (evenOdd) {
+                path.setFillType(SkPath::kEvenOdd_FillType);
+            }
+            paint.setColor(pdfContext->fGraphicsState.fNonStroking.fColor);
+            canvas->drawPath(path, paint);
+        }
+
+        if (stroke) {
+            paint.setStyle(SkPaint::kStroke_Style);
+            paint.setColor(pdfContext->fGraphicsState.fStroking.fColor);
+            paint.setStrokeWidth(SkDoubleToScalar(pdfContext->fGraphicsState.fLineWidth));
+            path.setFillType(SkPath::kWinding_FillType);  // reset it, just in case it messes up the stroke
+            canvas->drawPath(path, paint);
+        }
+    }
+
+    pdfContext->fGraphicsState.fPath.reset();
+    // todo zoom ... other stuff ?
+
+    if (pdfContext->fGraphicsState.fHasClipPathToApply) {
+#ifndef PDF_DEBUG_NO_CLIPING
+        canvas->clipPath(pdfContext->fGraphicsState.fClipPath, SkRegion::kIntersect_Op, true);
+#endif
+    }
+
+    //pdfContext->fGraphicsState.fClipPath.reset();
+    pdfContext->fGraphicsState.fHasClipPathToApply = false;
+
+    return kPartial_PdfResult;
+
+}
+
+PdfResult PdfOp_S(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    return PdfOp_fillAndStroke(pdfContext, canvas, false, true, false, false);
+}
+
+PdfResult PdfOp_s(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    return PdfOp_fillAndStroke(pdfContext, canvas, false, true, true, false);
+}
+
+PdfResult PdfOp_F(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    return PdfOp_fillAndStroke(pdfContext, canvas, true, false, false, false);
+}
+
+PdfResult PdfOp_f(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    return PdfOp_fillAndStroke(pdfContext, canvas, true, false, false, false);
+}
+
+PdfResult PdfOp_f_star(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    return PdfOp_fillAndStroke(pdfContext, canvas, true, false, false, true);
+}
+
+PdfResult PdfOp_B(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    return PdfOp_fillAndStroke(pdfContext, canvas, true, true, false, false);
+}
+
+PdfResult PdfOp_B_star(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    return PdfOp_fillAndStroke(pdfContext, canvas, true, true, false, true);
+}
+
+PdfResult PdfOp_b(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    return PdfOp_fillAndStroke(pdfContext, canvas, true, true, true, false);
+}
+
+PdfResult PdfOp_b_star(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    return PdfOp_fillAndStroke(pdfContext, canvas, true, true, true, true);
+}
+
+PdfResult PdfOp_n(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    canvas->setMatrix(pdfContext->fGraphicsState.fMatrix);
+    if (pdfContext->fGraphicsState.fHasClipPathToApply) {
+#ifndef PDF_DEBUG_NO_CLIPING
+        canvas->clipPath(pdfContext->fGraphicsState.fClipPath, SkRegion::kIntersect_Op, true);
+#endif
+    }
+
+    //pdfContext->fGraphicsState.fClipPath.reset();
+    pdfContext->fGraphicsState.fHasClipPathToApply = false;
+
+    pdfContext->fGraphicsState.fPathClosed = true;
+
+    return kOK_PdfResult;
+}
+
+PdfResult PdfOp_BT(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    pdfContext->fGraphicsState.fTextBlock   = true;
+    pdfContext->fGraphicsState.fMatrixTm = pdfContext->fGraphicsState.fMatrix;
+    pdfContext->fGraphicsState.fMatrixTlm = pdfContext->fGraphicsState.fMatrix;
+
+    return kPartial_PdfResult;
+}
+
+PdfResult PdfOp_ET(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    if (!pdfContext->fGraphicsState.fTextBlock) {
+        return kIgnoreError_PdfResult;
+    }
+    // TODO(edisonn): anything else to be done once we are done with draw text? Like restore stack?
+    return kPartial_PdfResult;
+}
+
+//font size Tf Set the text font, Tf
+//, to font and the text font size, Tfs, to size. font is the name of a
+//font resource in the Fontsubdictionary of the current resource dictionary; size is
+//a number representing a scale factor. There is no initial value for either font or
+//size; they must be specified explicitly using Tf before any text is shown.
+PdfResult PdfOp_Tf(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    pdfContext->fGraphicsState.fCurFontSize = pdfContext->fVarStack.top().GetReal();     pdfContext->fVarStack.pop();
+    PdfName fontName = pdfContext->fVarStack.top().GetName();                           pdfContext->fVarStack.pop();
+
+    // TODO(edisonn): Load font from pdfContext->fGraphicsState.fObjectWithResources ?
+    PdfObject* pFont = pdfContext->fPdfPage->GetFromResources( PdfName("Font"), fontName );
+    if( !pFont )
+    {
+        // TODO(edisonn): try to ignore the error, make sure we do not crash.
+        return kIgnoreError_PdfResult;
+    }
+
+    pdfContext->fGraphicsState.fCurFont = pdfContext->fPdfDoc->GetFont( pFont );
+    if( !pdfContext->fGraphicsState.fCurFont )
+    {
+        // TODO(edisonn): check ~/crasing, for one of the files PoDoFo throws exception
+        // when calling pFont->Reference(), with Linked list corruption.
+        return kIgnoreError_PdfResult;
+    }
+
+    return kPartial_PdfResult;
+}
+
+PdfResult PdfOp_Tj(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    if (!pdfContext->fGraphicsState.fTextBlock) {
+        // TODO(edisonn): try to recover and draw it any way?
+        return kIgnoreError_PdfResult;
+    }
+
+    PdfResult ret = DrawText(pdfContext,
+                             pdfContext->fGraphicsState.fCurFont,
+                             pdfContext->fVarStack.top().GetString(),
+                             canvas);
+    pdfContext->fVarStack.pop();
+
+    return ret;
+}
+
+PdfResult PdfOp_quote(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    if (!pdfContext->fGraphicsState.fTextBlock) {
+        // TODO(edisonn): try to recover and draw it any way?
+        return kIgnoreError_PdfResult;
+    }
+
+    PdfOp_T_star(pdfContext, canvas, looper);
+    // Do not pop, and push, just transfer the param to Tj
+    return PdfOp_Tj(pdfContext, canvas, looper);
+}
+
+PdfResult PdfOp_doublequote(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    if (!pdfContext->fGraphicsState.fTextBlock) {
+        // TODO(edisonn): try to recover and draw it any way?
+        return kIgnoreError_PdfResult;
+    }
+
+    PdfVariant str = pdfContext->fVarStack.top();       pdfContext->fVarStack.pop();
+    PdfVariant ac = pdfContext->fVarStack.top();        pdfContext->fVarStack.pop();
+    PdfVariant aw = pdfContext->fVarStack.top();        pdfContext->fVarStack.pop();
+
+    pdfContext->fVarStack.push(aw);
+    PdfOp_Tw(pdfContext, canvas, looper);
+
+    pdfContext->fVarStack.push(ac);
+    PdfOp_Tc(pdfContext, canvas, looper);
+
+    pdfContext->fVarStack.push(str);
+    PdfOp_quote(pdfContext, canvas, looper);
+
+    return kPartial_PdfResult;
+}
+
+PdfResult PdfOp_TJ(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    if (!pdfContext->fGraphicsState.fTextBlock) {
+        // TODO(edisonn): try to recover and draw it any way?
+        return kIgnoreError_PdfResult;
+    }
+
+    PdfArray array = pdfContext->fVarStack.top().GetArray();
+    pdfContext->fVarStack.pop();
+
+    for( int i=0; i<static_cast<int>(array.GetSize()); i++ )
+    {
+        if( array[i].IsString() || array[i].IsHexString() ) {
+            DrawText(pdfContext,
+                           pdfContext->fGraphicsState.fCurFont,
+                           array[i].GetString(),
+                           canvas);
+        } else if (array[i].IsReal() || array[i].IsNumber()) {
+            double dx = array[i].GetReal();
+            SkMatrix matrix;
+            matrix.setAll(SkDoubleToScalar(1),
+                          SkDoubleToScalar(0),
+                          // TODO(edisonn): use writing mode, vertical/horizontal.
+                          SkDoubleToScalar(-dx),  // amount is substracted!!!
+                          SkDoubleToScalar(0),
+                          SkDoubleToScalar(1),
+                          SkDoubleToScalar(0),
+                          SkDoubleToScalar(0),
+                          SkDoubleToScalar(0),
+                          SkDoubleToScalar(1));
+
+            pdfContext->fGraphicsState.fMatrixTm.preConcat(matrix);
+        }
+    }
+    return kPartial_PdfResult;  // TODO(edisonn): Implement fully DrawText before returing OK.
+}
+
+PdfResult PdfOp_CS_cs(PdfContext* pdfContext, SkCanvas* canvas, PdfColorOperator* colorOperator) {
+    colorOperator->fColorSpace = pdfContext->fVarStack.top().GetName().GetName();    pdfContext->fVarStack.pop();
+    return kOK_PdfResult;
+}
+
+PdfResult PdfOp_CS(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    return PdfOp_CS_cs(pdfContext, canvas, &pdfContext->fGraphicsState.fStroking);
+}
+
+PdfResult PdfOp_cs(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    return PdfOp_CS_cs(pdfContext, canvas, &pdfContext->fGraphicsState.fNonStroking);
+}
+
+PdfResult PdfOp_SC_sc(PdfContext* pdfContext, SkCanvas* canvas, PdfColorOperator* colorOperator) {
+    double c[4];
+    pdf_int64 v[4];
+
+    int n = GetColorSpaceComponents(colorOperator->fColorSpace);
+
+    bool doubles = true;
+    if (colorOperator->fColorSpace == "Indexed") {
+        doubles = false;
+    }
+
+#ifdef PDF_TRACE
+    printf("color space = %s, N = %i\n", colorOperator->fColorSpace.c_str(), n);
+#endif
+
+    for (int i = n - 1; i >= 0 ; i--) {
+        if (doubles) {
+            c[i] = pdfContext->fVarStack.top().GetReal();     pdfContext->fVarStack.pop();
+        } else {
+            v[i] = pdfContext->fVarStack.top().GetNumber();   pdfContext->fVarStack.pop();
+        }
+    }
+
+    // TODO(edisonn): Now, set that color. Only DeviceRGB supported.
+    if (colorOperator->fColorSpace == "DeviceRGB") {
+        colorOperator->setRGBColor(SkColorSetRGB(255*c[0], 255*c[1], 255*c[2]));
+    }
+    return kPartial_PdfResult;
+}
+
+PdfResult PdfOp_SC(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    return PdfOp_SC_sc(pdfContext, canvas, &pdfContext->fGraphicsState.fStroking);
+}
+
+PdfResult PdfOp_sc(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    return PdfOp_SC_sc(pdfContext, canvas, &pdfContext->fGraphicsState.fNonStroking);
+}
+
+PdfResult PdfOp_SCN_scn(PdfContext* pdfContext, SkCanvas* canvas, PdfColorOperator* colorOperator) {
+    PdfString name;
+
+    if (pdfContext->fVarStack.top().IsName()) {
+        pdfContext->fVarStack.pop();
+    }
+
+    // TODO(edisonn): SCN supports more color spaces than SCN. Read and implement spec.
+    PdfOp_SC_sc(pdfContext, canvas, colorOperator);
+
+    return kPartial_PdfResult;
+}
+
+PdfResult PdfOp_SCN(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    return PdfOp_SCN_scn(pdfContext, canvas, &pdfContext->fGraphicsState.fStroking);
+}
+
+PdfResult PdfOp_scn(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    return PdfOp_SCN_scn(pdfContext, canvas, &pdfContext->fGraphicsState.fNonStroking);
+}
+
+PdfResult PdfOp_G_g(PdfContext* pdfContext, SkCanvas* canvas, PdfColorOperator* colorOperator) {
+    double gray = pdfContext->fVarStack.top().GetReal();     pdfContext->fVarStack.pop();
+    return kNYI_PdfResult;
+}
+
+PdfResult PdfOp_G(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    return PdfOp_G_g(pdfContext, canvas, &pdfContext->fGraphicsState.fStroking);
+}
+
+PdfResult PdfOp_g(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    return PdfOp_G_g(pdfContext, canvas, &pdfContext->fGraphicsState.fNonStroking);
+}
+
+PdfResult PdfOp_RG_rg(PdfContext* pdfContext, SkCanvas* canvas, PdfColorOperator* colorOperator) {
+    double b = pdfContext->fVarStack.top().GetReal();     pdfContext->fVarStack.pop();
+    double g = pdfContext->fVarStack.top().GetReal();     pdfContext->fVarStack.pop();
+    double r = pdfContext->fVarStack.top().GetReal();     pdfContext->fVarStack.pop();
+
+    colorOperator->fColorSpace = "DeviceRGB";
+    colorOperator->setRGBColor(SkColorSetRGB(255*r, 255*g, 255*b));
+    return kOK_PdfResult;
+}
+
+PdfResult PdfOp_RG(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    return PdfOp_RG_rg(pdfContext, canvas, &pdfContext->fGraphicsState.fStroking);
+}
+
+PdfResult PdfOp_rg(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    return PdfOp_RG_rg(pdfContext, canvas, &pdfContext->fGraphicsState.fNonStroking);
+}
+
+PdfResult PdfOp_K_k(PdfContext* pdfContext, SkCanvas* canvas, PdfColorOperator* colorOperator) {
+    // TODO(edisonn): spec has some rules about overprint, implement them.
+    double k = pdfContext->fVarStack.top().GetReal();     pdfContext->fVarStack.pop();
+    double y = pdfContext->fVarStack.top().GetReal();     pdfContext->fVarStack.pop();
+    double m = pdfContext->fVarStack.top().GetReal();     pdfContext->fVarStack.pop();
+    double c = pdfContext->fVarStack.top().GetReal();     pdfContext->fVarStack.pop();
+
+    colorOperator->fColorSpace = "DeviceCMYK";
+    // TODO(edisonn): Set color.
+    return kNYI_PdfResult;
+}
+
+PdfResult PdfOp_K(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    return PdfOp_K_k(pdfContext, canvas, &pdfContext->fGraphicsState.fStroking);
+}
+
+PdfResult PdfOp_k(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    return PdfOp_K_k(pdfContext, canvas, &pdfContext->fGraphicsState.fNonStroking);
+}
+
+PdfResult PdfOp_W(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    pdfContext->fGraphicsState.fClipPath = pdfContext->fGraphicsState.fPath;
+    pdfContext->fGraphicsState.fHasClipPathToApply = true;
+
+    return kOK_PdfResult;
+}
+
+PdfResult PdfOp_W_star(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    pdfContext->fGraphicsState.fClipPath = pdfContext->fGraphicsState.fPath;
+
+#ifdef PDF_TRACE
+    if (pdfContext->fGraphicsState.fClipPath.isRect(NULL)) {
+        printf("CLIP IS RECT\n");
+    }
+#endif
+
+    // TODO(edisonn): there seem to be a bug with clipPath of a rect with even odd.
+    pdfContext->fGraphicsState.fClipPath.setFillType(SkPath::kEvenOdd_FillType);
+    pdfContext->fGraphicsState.fHasClipPathToApply = true;
+
+    return kPartial_PdfResult;
+}
+
+PdfResult PdfOp_BX(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    *looper = new PdfCompatibilitySectionLooper();
+    return kOK_PdfResult;
+}
+
+PdfResult PdfOp_EX(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+#ifdef ASSERT_BAD_PDF_OPS
+    SkASSERT(false);  // EX must be consumed by PdfCompatibilitySectionLooper, but let's
+                      // have the assert when testing good pdfs.
+#endif
+    return kIgnoreError_PdfResult;
+}
+
+PdfResult PdfOp_BI(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    *looper = new PdfInlineImageLooper();
+    return kOK_PdfResult;
+}
+
+PdfResult PdfOp_ID(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+#ifdef ASSERT_BAD_PDF_OPS
+    SkASSERT(false);  // must be processed in inline image looper, but let's
+                      // have the assert when testing good pdfs.
+#endif
+    return kIgnoreError_PdfResult;
+}
+
+PdfResult PdfOp_EI(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+#ifdef ASSERT_BAD_PDF_OPS
+    SkASSERT(false);  // must be processed in inline image looper, but let's
+                      // have the assert when testing good pdfs.
+#endif
+    return kIgnoreError_PdfResult;
+}
+
+//lineWidth w Set the line width in the graphics state (see “Line Width” on page 152).
+PdfResult PdfOp_w(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    double lineWidth = pdfContext->fVarStack.top().GetReal();     pdfContext->fVarStack.pop();
+    pdfContext->fGraphicsState.fLineWidth = lineWidth;
+
+    return kOK_PdfResult;
+}
+
+//lineCap J Set the line cap style in the graphics state (see “Line Cap Style” on page 153).
+PdfResult PdfOp_J(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    pdfContext->fVarStack.pop();
+    //double lineCap = pdfContext->fVarStack.top().GetReal();     pdfContext->fVarStack.pop();
+
+    return kNYI_PdfResult;
+}
+
+//lineJoin j Set the line join style in the graphics state (see “Line Join Style” on page 153).
+PdfResult PdfOp_j(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    pdfContext->fVarStack.pop();
+    //double lineJoin = pdfContext->fVarStack.top().GetReal();     pdfContext->fVarStack.pop();
+
+    return kNYI_PdfResult;
+}
+
+//miterLimit M Set the miter limit in the graphics state (see “Miter Limit” on page 153).
+PdfResult PdfOp_M(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    pdfContext->fVarStack.pop();
+    //double miterLimit = pdfContext->fVarStack.top().GetReal();     pdfContext->fVarStack.pop();
+
+    return kNYI_PdfResult;
+}
+
+//dashArray dashPhase d Set the line dash pattern in the graphics state (see “Line Dash Pattern” on
+//page 155).
+PdfResult PdfOp_d(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    pdfContext->fVarStack.pop();
+    pdfContext->fVarStack.pop();
+
+    return kNYI_PdfResult;
+}
+
+//intent ri (PDF 1.1) Set the color rendering intent in the graphics state (see “Rendering Intents” on page 197).
+PdfResult PdfOp_ri(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    pdfContext->fVarStack.pop();
+
+    return kNYI_PdfResult;
+}
+
+//flatness i Set the flatness tolerance in the graphics state (see Section 6.5.1, “Flatness
+//Tolerance”). flatness is a number in the range 0 to 100; a value of 0 speci-
+//fies the output device’s default flatness tolerance.
+PdfResult PdfOp_i(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    pdfContext->fVarStack.pop();
+
+    return kNYI_PdfResult;
+}
+
+//dictName gs (PDF 1.2) Set the specified parameters in the graphics state. dictName is
+//the name of a graphics state parameter dictionary in the ExtGState subdictionary of the current resource dictionary (see the next section).
+PdfResult PdfOp_gs(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    PdfName name = pdfContext->fVarStack.top().GetName();    pdfContext->fVarStack.pop();
+
+    PdfDictionary& pageDict = pdfContext->fGraphicsState.fObjectWithResources->GetDictionary();
+    PdfObject* resources = resolveReferenceObject(pdfContext->fPdfDoc,
+                                                        pageDict.GetKey("Resources"));
+
+    if (resources == NULL) {
+#ifdef PDF_TRACE
+        printf("WARNING: No Resources for a page with 'gs' operator!\n");
+#endif
+        return kIgnoreError_PdfResult;
+    }
+
+#ifdef PDF_TRACE
+    std::string str;
+    resources->ToString(str);
+    printf("Print gs Page Resources: %s\n", str.c_str());
+#endif
+
+    if (!resources->IsDictionary()) {
+#ifdef PDF_TRACE
+        printf("Resources is not a dictionary!\n");
+#endif
+        return kIgnoreError_PdfResult;
+    }
+
+    PdfDictionary& resourceDict = resources->GetDictionary();
+    //Next, get the ExtGState Dictionary from the Resource Dictionary:
+    PdfObject* extGStateDictionary = resolveReferenceObject(pdfContext->fPdfDoc,
+                                                                resourceDict.GetKey("ExtGState"));
+
+    if (extGStateDictionary == NULL) {
+#ifdef PDF_TRACE
+        printf("ExtGState is NULL!\n");
+#endif
+        return kIgnoreError_PdfResult;
+    }
+
+    if (!extGStateDictionary->IsDictionary()) {
+#ifdef PDF_TRACE
+        printf("extGStateDictionary is not a dictionary!\n");
+#endif
+        return kIgnoreError_PdfResult;
+    }
+
+    PdfObject* value =
+            resolveReferenceObject(pdfContext->fPdfDoc,
+                                   extGStateDictionary->GetDictionary().GetKey(name));
+
+    if (value == NULL) {
+#ifdef PDF_TRACE
+        printf("Named object not found!\n");
+#endif
+        return kIgnoreError_PdfResult;
+    }
+
+#ifdef PDF_TRACE
+    value->ToString(str);
+    printf("gs object value: %s\n", str.c_str());
+#endif
+
+    // TODO(edisonn): now load all those properties in graphic state.
+
+    return kNYI_PdfResult;
+}
+
+//charSpace Tc Set the character spacing, Tc
+//, to charSpace, which is a number expressed in unscaled text space units. Character spacing is used by the Tj, TJ, and ' operators.
+//Initial value: 0.
+PdfResult PdfOp_Tc(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    double charSpace = pdfContext->fVarStack.top().GetReal();     pdfContext->fVarStack.pop();
+    pdfContext->fGraphicsState.fCharSpace = charSpace;
+
+    return kOK_PdfResult;
+}
+
+//wordSpace Tw Set the word spacing, T
+//w
+//, to wordSpace, which is a number expressed in unscaled
+//text space units. Word spacing is used by the Tj, TJ, and ' operators. Initial
+//value: 0.
+PdfResult PdfOp_Tw(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    double wordSpace = pdfContext->fVarStack.top().GetReal();     pdfContext->fVarStack.pop();
+    pdfContext->fGraphicsState.fWordSpace = wordSpace;
+
+    return kOK_PdfResult;
+}
+
+//scale Tz Set the horizontal scaling, Th
+//, to (scale ˜ 100). scale is a number specifying the
+//percentage of the normal width. Initial value: 100 (normal width).
+PdfResult PdfOp_Tz(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    double scale = pdfContext->fVarStack.top().GetReal();     pdfContext->fVarStack.pop();
+
+    return kNYI_PdfResult;
+}
+
+//render Tr Set the text rendering mode, T
+//mode, to render, which is an integer. Initial value: 0.
+PdfResult PdfOp_Tr(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    double render = pdfContext->fVarStack.top().GetReal();     pdfContext->fVarStack.pop();
+
+    return kNYI_PdfResult;
+}
+
+//rise Ts Set the text rise, Trise, to rise, which is a number expressed in unscaled text space
+//units. Initial value: 0.
+PdfResult PdfOp_Ts(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    double rise = pdfContext->fVarStack.top().GetReal();     pdfContext->fVarStack.pop();
+
+    return kNYI_PdfResult;
+}
+
+//wx wy d0
+PdfResult PdfOp_d0(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    pdfContext->fVarStack.pop();
+    pdfContext->fVarStack.pop();
+
+    return kNYI_PdfResult;
+}
+
+//wx wy llx lly urx ury d1
+PdfResult PdfOp_d1(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    pdfContext->fVarStack.pop();
+    pdfContext->fVarStack.pop();
+    pdfContext->fVarStack.pop();
+    pdfContext->fVarStack.pop();
+    pdfContext->fVarStack.pop();
+    pdfContext->fVarStack.pop();
+
+    return kNYI_PdfResult;
+}
+
+//name sh
+PdfResult PdfOp_sh(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    pdfContext->fVarStack.pop();
+
+    return kNYI_PdfResult;
+}
+
+//name Do
+PdfResult PdfOp_Do(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    PdfName name = pdfContext->fVarStack.top().GetName();    pdfContext->fVarStack.pop();
+
+    PdfDictionary& pageDict = pdfContext->fGraphicsState.fObjectWithResources->GetDictionary();
+    PdfObject* resources = resolveReferenceObject(pdfContext->fPdfDoc,
+                                                        pageDict.GetKey("Resources"));
+
+    if (resources == NULL) {
+#ifdef PDF_TRACE
+        printf("WARNING: No Resources for a page with 'Do' operator!s\n");
+#endif
+        return kIgnoreError_PdfResult;
+    }
+
+#ifdef PDF_TRACE
+    std::string str;
+    resources->ToString(str);
+    printf("Print Do Page Resources: %s\n", str.c_str());
+#endif
+
+    if (!resources->IsDictionary()) {
+#ifdef PDF_TRACE
+        printf("Resources is not a dictionary!\n");
+#endif
+        return kIgnoreError_PdfResult;
+    }
+
+    PdfDictionary& resourceDict = resources->GetDictionary();
+    //Next, get the XObject Dictionary from the Resource Dictionary:
+    PdfObject* xObjectDictionary = resolveReferenceObject(pdfContext->fPdfDoc,
+                                                                resourceDict.GetKey("XObject"));
+
+    if (xObjectDictionary == NULL) {
+#ifdef PDF_TRACE
+        printf("XObject is NULL!\n");
+#endif
+        return kIgnoreError_PdfResult;
+    }
+
+    if (!xObjectDictionary->IsDictionary()) {
+#ifdef PDF_TRACE
+        printf("xObjectDictionary is not a dictionary!\n");
+#endif
+        return kIgnoreError_PdfResult;
+    }
+
+    PdfObject* value =
+            resolveReferenceObject(pdfContext->fPdfDoc,
+                                   xObjectDictionary->GetDictionary().GetKey(name));
+
+    if (value == NULL) {
+#ifdef PDF_TRACE
+        printf("Named object not found!\n");
+#endif
+        return kIgnoreError_PdfResult;
+    }
+
+#ifdef PDF_TRACE
+    value->ToString(str);
+    printf("Do object value: %s\n", str.c_str());
+#endif
+
+    return doXObject(pdfContext, canvas, *value);
+}
+
+
+//tag MP Designate a marked-content point. tag is a name object indicating the role or
+//significance of the point.
+PdfResult PdfOp_MP(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    pdfContext->fVarStack.pop();
+
+    return kNYI_PdfResult;
+}
+
+//tag properties DP Designate a marked-content point with an associated property list. tag is a
+//name object indicating the role or significance of the point; properties is
+//either an inline dictionary containing the property list or a name object
+//associated with it in the Properties subdictionary of the current resource
+//dictionary (see Section 9.5.1, “Property Lists”).
+PdfResult PdfOp_DP(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    pdfContext->fVarStack.pop();
+    pdfContext->fVarStack.pop();
+
+    return kNYI_PdfResult;
+}
+
+//tag BMC Begin a marked-content sequence terminated by a balancing EMC operator.
+//tag is a name object indicating the role or significance of the sequence.
+PdfResult PdfOp_BMC(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    pdfContext->fVarStack.pop();
+
+    return kNYI_PdfResult;
+}
+
+//tag properties BDC Begin a marked-content sequence with an associated property list, terminated
+//by a balancing EMCoperator. tag is a name object indicating the role or significance of the sequence; propertiesis either an inline dictionary containing the
+//property list or a name object associated with it in the Properties subdictionary of the current resource dictionary (see Section 9.5.1, “Property Lists”).
+PdfResult PdfOp_BDC(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    pdfContext->fVarStack.pop();
+    pdfContext->fVarStack.pop();
+
+    return kNYI_PdfResult;
+}
+
+//— EMC End a marked-content sequence begun by a BMC or BDC operator.
+PdfResult PdfOp_EMC(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
+    return kNYI_PdfResult;
+}
+
+void initPdfOperatorRenderes() {
+    static bool gInitialized = false;
+    if (gInitialized) {
+        return;
+    }
+
+    gPdfOps["q"] =      PdfOp_q;
+    gPdfOps["Q"] =      PdfOp_Q;
+    gPdfOps["cm"] =     PdfOp_cm;
+
+    gPdfOps["TD"] =     PdfOp_TD;
+    gPdfOps["Td"] =     PdfOp_Td;
+    gPdfOps["Tm"] =     PdfOp_Tm;
+    gPdfOps["T*"] =     PdfOp_T_star;
+
+    gPdfOps["m"] =      PdfOp_m;
+    gPdfOps["l"] =      PdfOp_l;
+    gPdfOps["c"] =      PdfOp_c;
+    gPdfOps["v"] =      PdfOp_v;
+    gPdfOps["y"] =      PdfOp_y;
+    gPdfOps["h"] =      PdfOp_h;
+    gPdfOps["re"] =     PdfOp_re;
+
+    gPdfOps["S"] =      PdfOp_S;
+    gPdfOps["s"] =      PdfOp_s;
+    gPdfOps["f"] =      PdfOp_f;
+    gPdfOps["F"] =      PdfOp_F;
+    gPdfOps["f*"] =     PdfOp_f_star;
+    gPdfOps["B"] =      PdfOp_B;
+    gPdfOps["B*"] =     PdfOp_B_star;
+    gPdfOps["b"] =      PdfOp_b;
+    gPdfOps["b*"] =     PdfOp_b_star;
+    gPdfOps["n"] =      PdfOp_n;
+
+    gPdfOps["BT"] =     PdfOp_BT;
+    gPdfOps["ET"] =     PdfOp_ET;
+
+    gPdfOps["Tj"] =     PdfOp_Tj;
+    gPdfOps["'"] =      PdfOp_quote;
+    gPdfOps["\""] =     PdfOp_doublequote;
+    gPdfOps["TJ"] =     PdfOp_TJ;
+
+    gPdfOps["CS"] =     PdfOp_CS;
+    gPdfOps["cs"] =     PdfOp_cs;
+    gPdfOps["SC"] =     PdfOp_SC;
+    gPdfOps["SCN"] =    PdfOp_SCN;
+    gPdfOps["sc"] =     PdfOp_sc;
+    gPdfOps["scn"] =    PdfOp_scn;
+    gPdfOps["G"] =      PdfOp_G;
+    gPdfOps["g"] =      PdfOp_g;
+    gPdfOps["RG"] =     PdfOp_RG;
+    gPdfOps["rg"] =     PdfOp_rg;
+    gPdfOps["K"] =      PdfOp_K;
+    gPdfOps["k"] =      PdfOp_k;
+
+    gPdfOps["W"] =      PdfOp_W;
+    gPdfOps["W*"] =     PdfOp_W_star;
+
+    gPdfOps["BX"] =     PdfOp_BX;
+    gPdfOps["EX"] =     PdfOp_EX;
+
+    gPdfOps["BI"] =     PdfOp_BI;
+    gPdfOps["ID"] =     PdfOp_ID;
+    gPdfOps["EI"] =     PdfOp_EI;
+
+    gPdfOps["w"] =      PdfOp_w;
+    gPdfOps["J"] =      PdfOp_J;
+    gPdfOps["j"] =      PdfOp_j;
+    gPdfOps["M"] =      PdfOp_M;
+    gPdfOps["d"] =      PdfOp_d;
+    gPdfOps["ri"] =     PdfOp_ri;
+    gPdfOps["i"] =      PdfOp_i;
+    gPdfOps["gs"] =     PdfOp_gs;
+
+    gPdfOps["Tc"] =     PdfOp_Tc;
+    gPdfOps["Tw"] =     PdfOp_Tw;
+    gPdfOps["Tz"] =     PdfOp_Tz;
+    gPdfOps["TL"] =     PdfOp_TL;
+    gPdfOps["Tf"] =     PdfOp_Tf;
+    gPdfOps["Tr"] =     PdfOp_Tr;
+    gPdfOps["Ts"] =     PdfOp_Ts;
+
+    gPdfOps["d0"] =     PdfOp_d0;
+    gPdfOps["d1"] =     PdfOp_d1;
+
+    gPdfOps["sh"] =     PdfOp_sh;
+
+    gPdfOps["Do"] =     PdfOp_Do;
+
+    gPdfOps["MP"] =     PdfOp_MP;
+    gPdfOps["DP"] =     PdfOp_DP;
+    gPdfOps["BMC"] =    PdfOp_BMC;
+    gPdfOps["BDC"] =    PdfOp_BDC;
+    gPdfOps["EMC"] =    PdfOp_EMC;
+
+    gInitialized = true;
+}
+
+void reportPdfRenderStats() {
+    std::map<std::string, int>::iterator iter;
+
+    for (int i = 0 ; i < kCount_PdfResult; i++) {
+        for (iter = gRenderStats[i].begin(); iter != gRenderStats[i].end(); ++iter) {
+            printf("%s: %s -> count %i\n", gRenderStatsNames[i], iter->first.c_str(), iter->second);
+        }
+    }
+}
+
+PdfResult PdfMainLooper::consumeToken(PdfToken& token) {
+    if( token.eType == ePdfContentsType_Keyword )
+    {
+        // TODO(edisonn): log trace flag (verbose, error, info, warning, ...)
+#ifdef PDF_TRACE
+        printf("KEYWORD: %s\n", token.pszToken);
+#endif
+        PdfOperatorRenderer pdfOperatorRenderer = gPdfOps[token.pszToken];
+        if (pdfOperatorRenderer) {
+            // caller, main work is done by pdfOperatorRenderer(...)
+            PdfTokenLooper* childLooper = NULL;
+            gRenderStats[pdfOperatorRenderer(fPdfContext, fCanvas, &childLooper)][token.pszToken]++;
+
+            if (childLooper) {
+                childLooper->setUp(this);
+                childLooper->loop();
+                delete childLooper;
+            }
+        } else {
+            gRenderStats[kUnsupported_PdfResult][token.pszToken]++;
+        }
+    }
+    else if ( token.eType == ePdfContentsType_Variant )
+    {
+#ifdef PDF_TRACE
+        std::string _var;
+        token.var.ToString(_var);
+        printf("var: %s\n", _var.c_str());
+#endif
+        fPdfContext->fVarStack.push( token.var );
+    }
+    else if ( token.eType == ePdfContentsType_ImageData) {
+        // TODO(edisonn): implement inline image.
+    }
+    else {
+        return kIgnoreError_PdfResult;
+    }
+    return kOK_PdfResult;
+}
+
+void PdfMainLooper::loop() {
+    PdfToken token;
+    while (readToken(fTokenizer, &token)) {
+        consumeToken(token);
+    }
+}
+
+PdfResult PdfInlineImageLooper::consumeToken(PdfToken& token) {
+    //pdfContext.fInlineImage.fKeyValuePairs[key] = value;
+    return kNYI_PdfResult;
+}
+
+void PdfInlineImageLooper::loop() {
+    PdfToken token;
+    while (readToken(fTokenizer, &token)) {
+        if (token.eType == ePdfContentsType_Keyword && strcmp(token.pszToken, "BX") == 0) {
+            PdfTokenLooper* looper = new PdfCompatibilitySectionLooper();
+            looper->setUp(this);
+            looper->loop();
+        } else {
+            if (token.eType == ePdfContentsType_Keyword && strcmp(token.pszToken, "EI") == 0) {
+                done();
+                return;
+            }
+
+            consumeToken(token);
+        }
+    }
+    // TODO(edisonn): report error/warning, EOF without EI.
+}
+
+PdfResult PdfInlineImageLooper::done() {
+
+    // TODO(edisonn): long to short names
+    // TODO(edisonn): set properties in a map
+    // TODO(edisonn): extract bitmap stream, check if PoDoFo has public utilities to uncompress
+    // the stream.
+
+    SkBitmap bitmap;
+    setup_bitmap(&bitmap, 50, 50, SK_ColorRED);
+
+    // TODO(edisonn): matrix use.
+    // Draw dummy red square, to show the prezence of the inline image.
+    fCanvas->drawBitmap(bitmap,
+                       SkDoubleToScalar(0),
+                       SkDoubleToScalar(0),
+                       NULL);
+    return kNYI_PdfResult;
+}
+
+PdfResult PdfCompatibilitySectionLooper::consumeToken(PdfToken& token) {
+    return fParent->consumeToken(token);
+}
+
+void PdfCompatibilitySectionLooper::loop() {
+    // TODO(edisonn): save stacks position, or create a new stack?
+    // TODO(edisonn): what happens if we pop out more variables then when we started?
+    // restore them? fail? We could create a new operands stack for every new BX/EX section,
+    // pop-ing too much will not affect outside the section.
+    PdfToken token;
+    while (readToken(fTokenizer, &token)) {
+        if (token.eType == ePdfContentsType_Keyword && strcmp(token.pszToken, "BX") == 0) {
+            PdfTokenLooper* looper = new PdfCompatibilitySectionLooper();
+            looper->setUp(this);
+            looper->loop();
+            delete looper;
+        } else {
+            if (token.eType == ePdfContentsType_Keyword && strcmp(token.pszToken, "EX") == 0) break;
+            fParent->consumeToken(token);
+        }
+    }
+    // TODO(edisonn): restore stack.
+}
+
+// TODO(edisonn): fix PoDoFo load ~/crashing/Shading.pdf
+// TODO(edisonn): Add API for Forms viewing and editing
+// e.g. SkBitmap getPage(int page);
+//      int formsCount();
+//      SkForm getForm(int formID); // SkForm(SkRect, .. other data)
+class SkPdfViewer : public SkRefCnt {
+public:
+
+  bool load(const SkString inputFileName, SkPicture* out) {
+
+    initPdfOperatorRenderes();
+
+    try
+    {
+        std::cout << "Init: " << inputFileName.c_str() << std::endl;
+        PdfMemDocument doc(inputFileName.c_str());
+        if( !doc.GetPageCount() )
+        {
+            std::cout << "ERROR: Empty Document" << inputFileName.c_str() << std::endl;
+            return false;
+        } else {
+
+            for (int pn = 0; pn < doc.GetPageCount(); ++pn) {
+                PoDoFo::PdfPage* page = doc.GetPage(pn);
+                PdfRect rect = page->GetMediaBox();
+#ifdef PDF_TRACE
+                printf("Page Width: %f, Page Height: %f\n", rect.GetWidth(), rect.GetHeight());
+#endif
+
+                // TODO(edisonn): page->GetCropBox(), page->GetTrimBox() ... how to use?
+
+                SkBitmap bitmap;
+#ifdef PDF_DEBUG_3X
+                setup_bitmap(&bitmap, 3*rect.GetWidth(), 3*rect.GetHeight());
+#else
+                setup_bitmap(&bitmap, rect.GetWidth(), rect.GetHeight());
+#endif
+                SkAutoTUnref<SkDevice> device(SkNEW_ARGS(SkDevice, (bitmap)));
+                SkCanvas canvas(device);
+
+
+                const char*      pszToken = NULL;
+                PdfVariant       var;
+                EPdfContentsType eType;
+
+                PdfContentsTokenizer tokenizer( page );
+
+                PdfContext pdfContext;
+                pdfContext.fPdfPage = page;
+                pdfContext.fPdfDoc = &doc;
+                pdfContext.fOriginalMatrix = SkMatrix::I();
+                pdfContext.fGraphicsState.fObjectWithResources = pdfContext.fPdfPage->GetObject();
+
+                gPdfContext = &pdfContext;
+                gDumpBitmap = &bitmap;
+                gDumpCanvas = &canvas;
+
+
+                // TODO(edisonn): get matrix stuff right.
+                // TODO(edisonn): add DPI/scale/zoom.
+                SkScalar z = SkIntToScalar(0);
+                SkScalar w = SkDoubleToScalar(rect.GetWidth());
+                SkScalar h = SkDoubleToScalar(rect.GetHeight());
+
+                SkPoint pdfSpace[4] = {SkPoint::Make(z, z), SkPoint::Make(w, z), SkPoint::Make(w, h), SkPoint::Make(z, h)};
+//                SkPoint skiaSpace[4] = {SkPoint::Make(z, h), SkPoint::Make(w, h), SkPoint::Make(w, z), SkPoint::Make(z, z)};
+
+                // TODO(edisonn): add flag for this app to create sourunding buffer zone
+                // TODO(edisonn): add flagg for no clipping.
+                // Use larger image to make sure we do not draw anything outside of page
+                // could be used in tests.
+
+#ifdef PDF_DEBUG_3X
+                SkPoint skiaSpace[4] = {SkPoint::Make(w+z, h+h), SkPoint::Make(w+w, h+h), SkPoint::Make(w+w, h+z), SkPoint::Make(w+z, h+z)};
+#else
+                SkPoint skiaSpace[4] = {SkPoint::Make(z, h), SkPoint::Make(w, h), SkPoint::Make(w, z), SkPoint::Make(z, z)};
+#endif
+                //SkPoint pdfSpace[2] = {SkPoint::Make(z, z), SkPoint::Make(w, h)};
+                //SkPoint skiaSpace[2] = {SkPoint::Make(w, z), SkPoint::Make(z, h)};
+
+                //SkPoint pdfSpace[2] = {SkPoint::Make(z, z), SkPoint::Make(z, h)};
+                //SkPoint skiaSpace[2] = {SkPoint::Make(z, h), SkPoint::Make(z, z)};
+
+                //SkPoint pdfSpace[3] = {SkPoint::Make(z, z), SkPoint::Make(z, h), SkPoint::Make(w, h)};
+                //SkPoint skiaSpace[3] = {SkPoint::Make(z, h), SkPoint::Make(z, z), SkPoint::Make(w, 0)};
+
+                SkASSERT(pdfContext.fOriginalMatrix.setPolyToPoly(pdfSpace, skiaSpace, 4));
+
+                pdfContext.fGraphicsState.fMatrix = pdfContext.fOriginalMatrix;
+                pdfContext.fGraphicsState.fMatrixTm = pdfContext.fGraphicsState.fMatrix;
+                pdfContext.fGraphicsState.fMatrixTlm = pdfContext.fGraphicsState.fMatrix;
+
+                canvas.setMatrix(pdfContext.fOriginalMatrix);
+
+#ifndef PDF_DEBUG_NO_PAGE_CLIPING
+                canvas.clipRect(SkRect::MakeXYWH(z, z, w, h), SkRegion::kIntersect_Op, true);
+#endif
+
+                PdfMainLooper looper(NULL, &tokenizer, &pdfContext, &canvas);
+                looper.loop();
+
+                canvas.flush();
+
+                SkString out;
+                out.appendf("%s-%i.png", inputFileName.c_str(), pn);
+                SkImageEncoder::EncodeFile(out.c_str(), bitmap, SkImageEncoder::kPNG_Type, 100);
+            }
+            return true;
+        }
+    }
+    catch( PdfError & e )
+    {
+        std::cout << "ERROR: PDF can't be parsed!" << inputFileName.c_str() << std::endl;
+        return false;
+    }
+
+    return true;
+  }
+  bool write(void*) const { return false; }
+};
+
+
+
+/**
+ * Given list of directories and files to use as input, expects to find .pdf
+ * files and it will convert them to .png files writing them in the same directory
+ * one file for each page.
+ *
+ * Returns zero exit code if all .pdf files were converted successfully,
+ * otherwise returns error code 1.
+ */
+
+static const char PDF_FILE_EXTENSION[] = "pdf";
+static const char PNG_FILE_EXTENSION[] = "png";
+
+// TODO(edisonn): add ability to write to a new directory.
+static void usage(const char* argv0) {
+    SkDebugf("PDF to PNG rendering tool\n");
+    SkDebugf("\n"
+"Usage: \n"
+"     %s <input>... -w <outputDir> \n"
+, argv0);
+    SkDebugf("\n\n");
+    SkDebugf(
+"     input:     A list of directories and files to use as input. Files are\n"
+"                expected to have the .skp extension.\n\n");
+    SkDebugf(
+"     outputDir: directory to write the rendered pdfs.\n\n");
+    SkDebugf("\n");
+}
+
+/** Replaces the extension of a file.
+ * @param path File name whose extension will be changed.
+ * @param old_extension The old extension.
+ * @param new_extension The new extension.
+ * @returns false if the file did not has the expected extension.
+ *  if false is returned, contents of path are undefined.
+ */
+static bool replace_filename_extension(SkString* path,
+                                       const char old_extension[],
+                                       const char new_extension[]) {
+    if (path->endsWith(old_extension)) {
+        path->remove(path->size() - strlen(old_extension),
+                     strlen(old_extension));
+        if (!path->endsWith(".")) {
+            return false;
+        }
+        path->append(new_extension);
+        return true;
+    }
+    return false;
+}
+
+/** Builds the output filename. path = dir/name, and it replaces expected
+ * .skp extension with .pdf extention.
+ * @param path Output filename.
+ * @param name The name of the file.
+ * @returns false if the file did not has the expected extension.
+ *  if false is returned, contents of path are undefined.
+ */
+static bool make_output_filepath(SkString* path, const SkString& dir,
+                                 const SkString& name) {
+    sk_tools::make_filepath(path, dir, name);
+    return replace_filename_extension(path,
+                                      PDF_FILE_EXTENSION,
+                                      PNG_FILE_EXTENSION);
+}
+
+/** Write the output of pdf renderer to a file.
+ * @param outputDir Output dir.
+ * @param inputFilename The skp file that was read.
+ * @param renderer The object responsible to write the pdf file.
+ */
+static bool write_output(const SkString& outputDir,
+                         const SkString& inputFilename,
+                         const SkPdfViewer& renderer) {
+    if (outputDir.isEmpty()) {
+        SkDynamicMemoryWStream stream;
+        renderer.write(&stream);
+        return true;
+    }
+
+    SkString outputPath;
+    if (!make_output_filepath(&outputPath, outputDir, inputFilename)) {
+        return false;
+    }
+
+    SkFILEWStream stream(outputPath.c_str());
+    if (!stream.isValid()) {
+        SkDebugf("Could not write to file %s\n", outputPath.c_str());
+        return false;
+    }
+    renderer.write(&stream);
+
+    return true;
+}
+
+/** Reads an skp file, renders it to pdf and writes the output to a pdf file
+ * @param inputPath The skp file to be read.
+ * @param outputDir Output dir.
+ * @param renderer The object responsible to render the skp object into pdf.
+ */
+static bool parse_pdf(const SkString& inputPath, const SkString& outputDir,
+                       SkPdfViewer& renderer) {
+    SkString inputFilename;
+    sk_tools::get_basename(&inputFilename, inputPath);
+
+    SkFILEStream inputStream;
+    inputStream.setPath(inputPath.c_str());
+    if (!inputStream.isValid()) {
+        SkDebugf("Could not open file %s\n", inputPath.c_str());
+        return false;
+    }
+
+    bool success = false;
+
+    success = renderer.load(inputPath, NULL);
+
+
+//    success = write_output(outputDir, inputFilename, renderer);
+
+    //renderer.end();
+    return success;
+}
+
+/** For each file in the directory or for the file passed in input, call
+ * parse_pdf.
+ * @param input A directory or an pdf file.
+ * @param outputDir Output dir.
+ * @param renderer The object responsible to render the skp object into pdf.
+ */
+static int process_input(const SkString& input, const SkString& outputDir,
+                         SkPdfViewer& renderer) {
+    int failures = 0;
+    if (sk_isdir(input.c_str())) {
+        SkOSFile::Iter iter(input.c_str(), PDF_FILE_EXTENSION);
+        SkString inputFilename;
+        while (iter.next(&inputFilename)) {
+            SkString inputPath;
+            sk_tools::make_filepath(&inputPath, input, inputFilename);
+            if (!parse_pdf(inputPath, outputDir, renderer)) {
+                ++failures;
+            }
+        }
+    } else {
+        SkString inputPath(input);
+        if (!parse_pdf(inputPath, outputDir, renderer)) {
+            ++failures;
+        }
+    }
+    return failures;
+}
+
+static void parse_commandline(int argc, char* const argv[],
+                              SkTArray<SkString>* inputs,
+                              SkString* outputDir) {
+    const char* argv0 = argv[0];
+    char* const* stop = argv + argc;
+
+    for (++argv; argv < stop; ++argv) {
+        if ((0 == strcmp(*argv, "-h")) || (0 == strcmp(*argv, "--help"))) {
+            usage(argv0);
+            exit(-1);
+        } else if (0 == strcmp(*argv, "-w")) {
+            ++argv;
+            if (argv >= stop) {
+                SkDebugf("Missing outputDir for -w\n");
+                usage(argv0);
+                exit(-1);
+            }
+            *outputDir = SkString(*argv);
+        } else {
+            inputs->push_back(SkString(*argv));
+        }
+    }
+
+    if (inputs->count() < 1) {
+        usage(argv0);
+        exit(-1);
+    }
+}
+
+int tool_main_core(int argc, char** argv);
+int tool_main_core(int argc, char** argv) {
+    SkAutoGraphics ag;
+    SkTArray<SkString> inputs;
+
+    SkAutoTUnref<SkPdfViewer>
+        renderer(SkNEW(SkPdfViewer));
+    SkASSERT(renderer.get());
+
+    SkString outputDir;
+    parse_commandline(argc, argv, &inputs, &outputDir);
+
+    int failures = 0;
+    for (int i = 0; i < inputs.count(); i ++) {
+        failures += process_input(inputs[i], outputDir, *renderer);
+    }
+
+    reportPdfRenderStats();
+
+    if (failures != 0) {
+        SkDebugf("Failed to render %i PDFs.\n", failures);
+        return 1;
+    }
+
+    return 0;
+}
+
+int tool_main(int argc, char** argv);
+int tool_main(int argc, char** argv) {
+#ifdef SK_USE_CDB
+    setUpDebuggingFromArgs(argv[0]);
+    __try {
+#endif
+      return tool_main_core(argc, argv);
+#ifdef SK_USE_CDB
+    }
+    __except(GenerateDumpAndPrintCallstack(GetExceptionInformation()))
+    {
+        return -1;
+    }
+#endif
+    return 0;
+}
+
+#if !defined SK_BUILD_FOR_IOS
+int main(int argc, char * const argv[]) {
+    return tool_main(argc, (char**) argv);
+}
+#endif