pdf viewer: refactor and fix a bug (SkPdfobject should not reset on destruct)

experimental/PdfViewer/SkPdfParser.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 "SkForceLinking.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"
-
-#include <iostream>
-#include <cstdio>
-#include <stack>
-#include <set>
-
-__SK_FORCE_IMAGE_DECODER_LINKING;
-
-// TODO(edisonn): tool, show what objects were read at least, show the ones not even read
-// keep for each object pos in file
-// plug in for VS? syntax coloring, show selected object ... from the text, or from rendered x,y
-
-// TODO(edisonn): security - validate all the user input, all pdf!
-
-// TODO(edisonn): put drawtext in #ifdefs, so comparations will ignore minor changes in text positioning and font
-// this way, we look more at other features and layout in diffs
-
-// TODO(edisonn): move trace dump in the get functions, and mapper ones too so it ghappens automatically
-/*
-#ifdef PDF_TRACE
-    std::string str;
-    pdfContext->fGraphicsState.fResources->native()->ToString(str);
-    printf("Print Tf Resources: %s\n", str.c_str());
-#endif
- */
-
-#include "SkPdfHeaders_autogen.h"
-#include "SkPdfMapper_autogen.h"
-#include "SkPdfParser.h"
-
-#include "SkPdfBasics.h"
-#include "SkPdfUtils.h"
-
-#include "SkPdfFont.h"
-
-/*
- * TODO(edisonn):
- * - all font types and all ppdf font features
- *      - word spacing
- *      - load font for baidu.pdf
- *      - load font for youtube.pdf
- *      - parser for pdf from the definition already available in pdfspec_autogen.py
- *      - all docs from ~/work
- * - encapsulate native in the pdf api so the skpdf does not know anything about native ... in progress
- * - load gs/ especially smask and already known prop (skp) ... in progress
- * - wrapper on classes for customizations? e.g.
- * SkPdfPageObjectVanila - has only the basic loaders/getters
- * SkPdfPageObject : public SkPdfPageObjectVanila, extends, and I can add customizations here
- * need to find a nice object model for all this with constructors and factories
- * - deal with inheritable automatically ?
- * - deal with specific type in spec directly, add all dictionary types to known types
-*/
-
-using namespace std;
-
-// 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 ...
-static 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;
-    }
-}
-
-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;
-}
-
-SkMatrix SkMatrixFromPdfArray(SkPdfArray* pdfArray) {
-    double array[6];
-
-    // TODO(edisonn): security issue, ret if size() != 6
-    for (int i = 0; i < 6; i++) {
-        const SkPdfObject* elem = pdfArray->operator [](i);
-        if (elem == NULL || !elem->isNumber()) {
-            return SkMatrix::I();  // TODO(edisonn): report issue
-        }
-        array[i] = elem->numberValue();
-    }
-
-    return SkMatrixFromPdfMatrix(array);
-}
-
-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;
-
-
-#ifdef PDF_TRACE_DIFF_IN_PNG
-static 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);
-}
-#endif  // PDF_TRACE_DIFF_IN_PNG
-
-// TODO(edisonn): Pass PdfContext and SkCanvasd only with the define for instrumentation.
-static bool readToken(SkPdfNativeTokenizer* fTokenizer, PdfToken* token) {
-    bool ret = fTokenizer->readToken(token);
-
-    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->fType == kKeyword_TokenType) {
-        strcpy(gLastKeyword, token->fKeyword);
-        gLastOpKeyword = gReadOp;
-    } else {
-        strcpy(gLastKeyword, "");
-    }
-#endif
-
-    return ret;
-}
-
-
-
-typedef PdfResult (*PdfOperatorRenderer)(PdfContext*, SkCanvas*, PdfTokenLooper**);
-
-map<std::string, PdfOperatorRenderer> gPdfOps;
-
-map<std::string, int> gRenderStats[kCount_PdfResult];
-
-const char* gRenderStatsNames[kCount_PdfResult] = {
-    "Success",
-    "Partially implemented",
-    "Not yet implemented",
-    "Ignore Error",
-    "Error",
-    "Unsupported/Unknown"
-};
-
-static PdfResult DrawText(PdfContext* pdfContext,
-                   const SkPdfObject* _str,
-                   SkCanvas* canvas)
-{
-
-    SkPdfFont* skfont = pdfContext->fGraphicsState.fSkFont;
-    if (skfont == NULL) {
-        skfont = SkPdfFont::Default();
-    }
-
-
-    if (_str == NULL || !_str->isAnyString()) {
-        // TODO(edisonn): report warning
-        return kIgnoreError_PdfResult;
-    }
-    const SkPdfString* str = (const SkPdfString*)_str;
-
-    SkUnencodedText binary(str);
-
-    SkDecodedText decoded;
-
-    if (skfont->encoding() == NULL) {
-        // TODO(edisonn): report warning
-        return kNYI_PdfResult;
-    }
-
-    skfont->encoding()->decodeText(binary, &decoded);
-
-    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 && fCurFont->GetFontScale() != 0) {
-//        paint.setTextScaleX(SkFloatToScalar(fCurFont->GetFontScale() / 100.0));
-//    }
-
-    pdfContext->fGraphicsState.applyGraphicsState(&paint, false);
-
-    canvas->save();
-
-#if 1
-    SkMatrix matrix = pdfContext->fGraphicsState.fMatrixTm;
-
-    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");
-#endif
-
-    skfont->drawText(decoded, &paint, pdfContext, canvas);
-    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): perf!!!
-
-static SkColorTable* getGrayColortable() {
-    static SkColorTable* grayColortable = NULL;
-    if (grayColortable == NULL) {
-        SkPMColor* colors = new SkPMColor[256];
-        for (int i = 0 ; i < 256; i++) {
-            colors[i] = SkPreMultiplyARGB(255, i, i, i);
-        }
-        grayColortable = new SkColorTable(colors, 256);
-    }
-    return grayColortable;
-}
-
-static SkBitmap transferImageStreamToBitmap(unsigned char* uncompressedStream, size_t uncompressedStreamLength,
-                                     int width, int height, int bytesPerLine,
-                                     int bpc, const std::string& colorSpace,
-                                     bool transparencyMask) {
-    SkBitmap bitmap;
-
-    //int components = GetColorSpaceComponents(colorSpace);
-//#define MAX_COMPONENTS 10
-
-    // TODO(edisonn): assume start of lines are aligned at 32 bits?
-    // Is there a faster way to load the uncompressed stream into a bitmap?
-
-    // minimal support for now
-    if ((colorSpace == "DeviceRGB" || colorSpace == "RGB") && bpc == 8) {
-        SkColor* uncompressedStreamArgb = (SkColor*)malloc(width * height * sizeof(SkColor));
-
-        for (int h = 0 ; h < height; h++) {
-            long i = width * (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;
-        }
-
-        bitmap.setConfig(SkBitmap::kARGB_8888_Config, width, height);
-        bitmap.setPixels(uncompressedStreamArgb);
-    }
-    else if ((colorSpace == "DeviceGray" || colorSpace == "Gray") && bpc == 8) {
-        unsigned char* uncompressedStreamA8 = (unsigned char*)malloc(width * height);
-
-        for (int h = 0 ; h < height; h++) {
-            long i = width * (h);
-            for (int w = 0 ; w < width; w++) {
-                uncompressedStreamA8[i] = transparencyMask ? 255 - uncompressedStream[w] :
-                                                             uncompressedStream[w];
-                i++;
-            }
-            uncompressedStream += bytesPerLine;
-        }
-
-        bitmap.setConfig(transparencyMask ? SkBitmap::kA8_Config : SkBitmap::kIndex8_Config,
-                         width, height);
-        bitmap.setPixels(uncompressedStreamA8, transparencyMask ? NULL : getGrayColortable());
-    }
-
-    // TODO(edisonn): Report Warning, NYI, or error
-    return bitmap;
-}
-
-// utils
-
-// TODO(edisonn): add cache, or put the bitmap property directly on the PdfObject
-// TODO(edisonn): deal with colorSpaces, we could add them to SkBitmap::Config
-// TODO(edisonn): preserve A1 format that skia knows, + fast convert from 111, 222, 444 to closest
-// skia format, through a table
-
-// this functions returns the image, it does not look at the smask.
-
-static SkBitmap getImageFromObject(PdfContext* pdfContext, SkPdfImageDictionary* image, bool transparencyMask) {
-    if (image == NULL || !image->hasStream()) {
-        // TODO(edisonn): report warning to be used in testing.
-        return SkBitmap();
-    }
-
-    int64_t bpc = image->BitsPerComponent(pdfContext->fPdfDoc);
-    int64_t width = image->Width(pdfContext->fPdfDoc);
-    int64_t height = image->Height(pdfContext->fPdfDoc);
-    std::string colorSpace = "DeviceRGB";
-
-    // TODO(edisonn): color space can be an array too!
-    if (image->isColorSpaceAName(pdfContext->fPdfDoc)) {
-        colorSpace = image->getColorSpaceAsName(pdfContext->fPdfDoc);
-    }
-
-/*
-    bool imageMask = image->imageMask();
-
-    if (imageMask) {
-        if (bpc != 0 && bpc != 1) {
-            // TODO(edisonn): report warning to be used in testing.
-            return SkBitmap();
-        }
-        bpc = 1;
-    }
-*/
-
-    unsigned char* uncompressedStream = NULL;
-    size_t uncompressedStreamLength = 0;
-
-    SkPdfStream* stream = (SkPdfStream*)image;
-
-    if (!stream || !stream->GetFilteredStreamRef(&uncompressedStream, &uncompressedStreamLength, pdfContext->fPdfDoc->allocator()) ||
-            uncompressedStream == NULL || uncompressedStreamLength == 0) {
-        // TODO(edisonn): report warning to be used in testing.
-        return SkBitmap();
-    }
-
-    SkPdfStreamCommonDictionary* streamDict = (SkPdfStreamCommonDictionary*)stream;
-
-    if (streamDict->has_Filter() && ((streamDict->isFilterAName(NULL) &&
-                                          streamDict->getFilterAsName(NULL) == "DCTDecode") ||
-                                     (streamDict->isFilterAArray(NULL) &&
-                                          streamDict->getFilterAsArray(NULL)->size() > 0 &&
-                                          streamDict->getFilterAsArray(NULL)->objAtAIndex(0)->isName() &&
-                                          streamDict->getFilterAsArray(NULL)->objAtAIndex(0)->nameValue2() == "DCTDecode"))) {
-        SkBitmap bitmap;
-        SkImageDecoder::DecodeMemory(uncompressedStream, uncompressedStreamLength, &bitmap);
-        return bitmap;
-    }
-
-
-
-    // TODO (edisonn): Fast Jpeg(DCTDecode) draw, or fast PNG(FlateDecode) draw ...
-//    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]);
-//    }
-//    if (value && value->IsName() && value->GetName().GetName() == "DCTDecode") {
-//        SkStream stream = SkStream::
-//        SkImageDecoder::Factory()
-//    }
-
-    int bytesPerLine = uncompressedStreamLength / height;
-#ifdef PDF_TRACE
-    if (uncompressedStreamLength % height != 0) {
-        printf("Warning uncompressedStreamLength modulo height != 0 !!!\n");
-    }
-#endif
-
-    SkBitmap bitmap = transferImageStreamToBitmap(
-            (unsigned char*)uncompressedStream, uncompressedStreamLength,
-            (int)width, (int)height, bytesPerLine,
-            (int)bpc, colorSpace,
-            transparencyMask);
-
-    return bitmap;
-}
-
-static SkBitmap getSmaskFromObject(PdfContext* pdfContext, SkPdfImageDictionary* obj) {
-    SkPdfImageDictionary* sMask = obj->SMask(pdfContext->fPdfDoc);
-
-    if (sMask) {
-        return getImageFromObject(pdfContext, sMask, true);
-    }
-
-    // TODO(edisonn): implement GS SMask. Default to empty right now.
-    return pdfContext->fGraphicsState.fSMask;
-}
-
-static PdfResult doXObject_Image(PdfContext* pdfContext, SkCanvas* canvas, SkPdfImageDictionary* skpdfimage) {
-    if (skpdfimage == NULL) {
-        return kIgnoreError_PdfResult;
-    }
-
-    SkBitmap image = getImageFromObject(pdfContext, skpdfimage, false);
-    SkBitmap sMask = getSmaskFromObject(pdfContext, skpdfimage);
-
-    canvas->save();
-    canvas->setMatrix(pdfContext->fGraphicsState.fMatrix);
-
-#if 1
-    SkScalar z = SkIntToScalar(0);
-    SkScalar one = SkIntToScalar(1);
-
-    SkPoint from[4] = {SkPoint::Make(z, z), SkPoint::Make(one, z), SkPoint::Make(one, one), SkPoint::Make(z, one)};
-    SkPoint to[4] = {SkPoint::Make(z, one), SkPoint::Make(one, one), SkPoint::Make(one, z), SkPoint::Make(z, z)};
-    SkMatrix flip;
-    SkAssertResult(flip.setPolyToPoly(from, to, 4));
-    SkMatrix solveImageFlip = pdfContext->fGraphicsState.fMatrix;
-    solveImageFlip.preConcat(flip);
-    canvas->setMatrix(solveImageFlip);
-#endif
-
-    SkRect dst = SkRect::MakeXYWH(SkDoubleToScalar(0.0), SkDoubleToScalar(0.0), SkDoubleToScalar(1.0), SkDoubleToScalar(1.0));
-
-    if (sMask.empty()) {
-        canvas->drawBitmapRect(image, dst, NULL);
-    } else {
-        canvas->saveLayer(&dst, NULL);
-        canvas->drawBitmapRect(image, dst, NULL);
-        SkPaint xfer;
-        pdfContext->fGraphicsState.applyGraphicsState(&xfer, false);
-        xfer.setXfermodeMode(SkXfermode::kSrcOut_Mode); // SkXfermode::kSdtOut_Mode
-        canvas->drawBitmapRect(sMask, dst, &xfer);
-        canvas->restore();
-    }
-
-    canvas->restore();
-
-    return kPartial_PdfResult;
-}
-
-
-
-
-static PdfResult doXObject_Form(PdfContext* pdfContext, SkCanvas* canvas, SkPdfType1FormDictionary* skobj) {
-    if (!skobj || !skobj->hasStream()) {
-        return kIgnoreError_PdfResult;
-    }
-
-    PdfOp_q(pdfContext, canvas, NULL);
-    canvas->save();
-
-
-    if (skobj->Resources(pdfContext->fPdfDoc)) {
-        pdfContext->fGraphicsState.fResources = skobj->Resources(pdfContext->fPdfDoc);
-    }
-
-    SkTraceMatrix(pdfContext->fGraphicsState.fMatrix, "Current matrix");
-
-    if (skobj->has_Matrix()) {
-        pdfContext->fGraphicsState.fMatrix.preConcat(skobj->Matrix(pdfContext->fPdfDoc));
-        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);
-
-    if (skobj->has_BBox()) {
-        canvas->clipRect(skobj->BBox(pdfContext->fPdfDoc), 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.
-
-    SkPdfStream* stream = (SkPdfStream*)skobj;
-
-    SkPdfNativeTokenizer* tokenizer = pdfContext->fPdfDoc->tokenizerOfStream(stream);
-    if (tokenizer != NULL) {
-        PdfMainLooper looper(NULL, tokenizer, pdfContext, canvas);
-        looper.loop();
-        delete tokenizer;
-    }
-
-    // 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 kPartial_PdfResult;
-}
-
-//static PdfResult doXObject_PS(PdfContext* pdfContext, SkCanvas* canvas, const SkPdfObject* obj) {
-//    return kNYI_PdfResult;
-//}
-
-PdfResult doType3Char(PdfContext* pdfContext, SkCanvas* canvas, const SkPdfObject* skobj, SkRect bBox, SkMatrix matrix, double textSize) {
-    if (!skobj || !skobj->hasStream()) {
-        return kIgnoreError_PdfResult;
-    }
-
-    PdfOp_q(pdfContext, canvas, NULL);
-    canvas->save();
-
-    pdfContext->fGraphicsState.fMatrixTm.preConcat(matrix);
-    pdfContext->fGraphicsState.fMatrixTm.preScale(SkDoubleToScalar(textSize), SkDoubleToScalar(textSize));
-
-    pdfContext->fGraphicsState.fMatrix = pdfContext->fGraphicsState.fMatrixTm;
-    pdfContext->fGraphicsState.fMatrixTlm = pdfContext->fGraphicsState.fMatrix;
-
-    SkTraceMatrix(pdfContext->fGraphicsState.fMatrix, "Total matrix");
-
-    canvas->setMatrix(pdfContext->fGraphicsState.fMatrix);
-
-    SkRect rm = bBox;
-    pdfContext->fGraphicsState.fMatrix.mapRect(&rm);
-
-    SkTraceRect(rm, "bbox mapped");
-
-    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.
-
-    SkPdfStream* stream = (SkPdfStream*)skobj;
-
-    SkPdfNativeTokenizer* tokenizer = pdfContext->fPdfDoc->tokenizerOfStream(stream);
-    if (tokenizer != NULL) {
-        PdfMainLooper looper(NULL, tokenizer, pdfContext, canvas);
-        looper.loop();
-        delete tokenizer;
-    }
-
-    // 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 kPartial_PdfResult;
-}
-
-
-// TODO(edisonn): make sure the pointer is unique
-std::set<const SkPdfObject*> gInRendering;
-
-class CheckRecursiveRendering {
-    const SkPdfObject* fUniqueData;
-public:
-    CheckRecursiveRendering(const SkPdfObject* obj) : fUniqueData(obj) {
-        gInRendering.insert(obj);
-    }
-
-    ~CheckRecursiveRendering() {
-        //SkASSERT(fObj.fInRendering);
-        gInRendering.erase(fUniqueData);
-    }
-
-    static bool IsInRendering(const SkPdfObject* obj) {
-        return gInRendering.find(obj) != gInRendering.end();
-    }
-};
-
-static PdfResult doXObject(PdfContext* pdfContext, SkCanvas* canvas, const SkPdfObject* obj) {
-    if (CheckRecursiveRendering::IsInRendering(obj)) {
-        // Oops, corrupt PDF!
-        return kIgnoreError_PdfResult;
-    }
-
-    CheckRecursiveRendering checkRecursion(obj);
-
-    switch (pdfContext->fPdfDoc->mapper()->mapXObjectDictionary(obj))
-    {
-        case kImageDictionary_SkPdfObjectType:
-            return doXObject_Image(pdfContext, canvas, (SkPdfImageDictionary*)obj);
-        case kType1FormDictionary_SkPdfObjectType:
-            return doXObject_Form(pdfContext, canvas, (SkPdfType1FormDictionary*)obj);
-        //case kObjectDictionaryXObjectPS_SkPdfObjectType:
-            //return doXObject_PS(skxobj.asPS());
-        default:
-            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;
-}
-
-static PdfResult PdfOp_cm(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    double array[6];
-    for (int i = 0 ; i < 6 ; i++) {
-        array[5 - i] = pdfContext->fObjectStack.top()->numberValue();
-        pdfContext->fObjectStack.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, "cm");
-#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.
-static PdfResult PdfOp_TL(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    double ty = pdfContext->fObjectStack.top()->numberValue();   pdfContext->fObjectStack.pop();
-
-    pdfContext->fGraphicsState.fTextLeading = ty;
-
-    return kOK_PdfResult;
-}
-
-static PdfResult PdfOp_Td(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    double ty = pdfContext->fObjectStack.top()->numberValue(); pdfContext->fObjectStack.pop();
-    double tx = pdfContext->fObjectStack.top()->numberValue(); pdfContext->fObjectStack.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;
-}
-
-static PdfResult PdfOp_TD(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    double ty = pdfContext->fObjectStack.top()->numberValue(); pdfContext->fObjectStack.pop();
-    double tx = pdfContext->fObjectStack.top()->numberValue(); pdfContext->fObjectStack.pop();
-
-    // TODO(edisonn): Create factory methods or constructors so native is hidden
-    SkPdfReal* _ty = pdfContext->fPdfDoc->createReal(-ty);
-    pdfContext->fObjectStack.push(_ty);
-
-    PdfOp_TL(pdfContext, canvas, looper);
-
-    SkPdfReal* vtx = pdfContext->fPdfDoc->createReal(tx);
-    pdfContext->fObjectStack.push(vtx);
-
-    SkPdfReal* vty = pdfContext->fPdfDoc->createReal(ty);
-    pdfContext->fObjectStack.push(vty);
-
-    PdfResult ret = PdfOp_Td(pdfContext, canvas, looper);
-
-    // TODO(edisonn): delete all the objects after rendering was complete, in this way pdf is rendered faster
-    // and the cleanup can happen while the user looks at the image
-    delete _ty;
-    delete vtx;
-    delete vty;
-
-    return ret;
-}
-
-static PdfResult PdfOp_Tm(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    double f = pdfContext->fObjectStack.top()->numberValue(); pdfContext->fObjectStack.pop();
-    double e = pdfContext->fObjectStack.top()->numberValue(); pdfContext->fObjectStack.pop();
-    double d = pdfContext->fObjectStack.top()->numberValue(); pdfContext->fObjectStack.pop();
-    double c = pdfContext->fObjectStack.top()->numberValue(); pdfContext->fObjectStack.pop();
-    double b = pdfContext->fObjectStack.top()->numberValue(); pdfContext->fObjectStack.pop();
-    double a = pdfContext->fObjectStack.top()->numberValue(); pdfContext->fObjectStack.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
-static PdfResult PdfOp_T_star(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    SkPdfReal* zero = pdfContext->fPdfDoc->createReal(0.0);
-    SkPdfReal* tl = pdfContext->fPdfDoc->createReal(pdfContext->fGraphicsState.fTextLeading);
-
-    pdfContext->fObjectStack.push(zero);
-    pdfContext->fObjectStack.push(tl);
-
-    PdfResult ret = PdfOp_Td(pdfContext, canvas, looper);
-
-    delete zero;  // TODO(edisonn): do not alocate and delete constants!
-    delete tl;
-
-    return ret;
-}
-
-static 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->fObjectStack.top()->numberValue();    pdfContext->fObjectStack.pop();
-    pdfContext->fGraphicsState.fCurPosX = pdfContext->fObjectStack.top()->numberValue();    pdfContext->fObjectStack.pop();
-
-    pdfContext->fGraphicsState.fPath.moveTo(SkDoubleToScalar(pdfContext->fGraphicsState.fCurPosX),
-                                          SkDoubleToScalar(pdfContext->fGraphicsState.fCurPosY));
-
-    return kOK_PdfResult;
-}
-
-static 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->fObjectStack.top()->numberValue();    pdfContext->fObjectStack.pop();
-    pdfContext->fGraphicsState.fCurPosX = pdfContext->fObjectStack.top()->numberValue();    pdfContext->fObjectStack.pop();
-
-    pdfContext->fGraphicsState.fPath.lineTo(SkDoubleToScalar(pdfContext->fGraphicsState.fCurPosX),
-                                          SkDoubleToScalar(pdfContext->fGraphicsState.fCurPosY));
-
-    return kOK_PdfResult;
-}
-
-static PdfResult PdfOp_c(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    if (pdfContext->fGraphicsState.fPathClosed) {
-        pdfContext->fGraphicsState.fPath.reset();
-        pdfContext->fGraphicsState.fPathClosed = false;
-    }
-
-    double y3 = pdfContext->fObjectStack.top()->numberValue();    pdfContext->fObjectStack.pop();
-    double x3 = pdfContext->fObjectStack.top()->numberValue();    pdfContext->fObjectStack.pop();
-    double y2 = pdfContext->fObjectStack.top()->numberValue();    pdfContext->fObjectStack.pop();
-    double x2 = pdfContext->fObjectStack.top()->numberValue();    pdfContext->fObjectStack.pop();
-    double y1 = pdfContext->fObjectStack.top()->numberValue();    pdfContext->fObjectStack.pop();
-    double x1 = pdfContext->fObjectStack.top()->numberValue();    pdfContext->fObjectStack.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;
-}
-
-static PdfResult PdfOp_v(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    if (pdfContext->fGraphicsState.fPathClosed) {
-        pdfContext->fGraphicsState.fPath.reset();
-        pdfContext->fGraphicsState.fPathClosed = false;
-    }
-
-    double y3 = pdfContext->fObjectStack.top()->numberValue();    pdfContext->fObjectStack.pop();
-    double x3 = pdfContext->fObjectStack.top()->numberValue();    pdfContext->fObjectStack.pop();
-    double y2 = pdfContext->fObjectStack.top()->numberValue();    pdfContext->fObjectStack.pop();
-    double x2 = pdfContext->fObjectStack.top()->numberValue();    pdfContext->fObjectStack.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;
-}
-
-static PdfResult PdfOp_y(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    if (pdfContext->fGraphicsState.fPathClosed) {
-        pdfContext->fGraphicsState.fPath.reset();
-        pdfContext->fGraphicsState.fPathClosed = false;
-    }
-
-    double y3 = pdfContext->fObjectStack.top()->numberValue();    pdfContext->fObjectStack.pop();
-    double x3 = pdfContext->fObjectStack.top()->numberValue();    pdfContext->fObjectStack.pop();
-    double y2 = pdfContext->fGraphicsState.fCurPosY;
-    double x2 = pdfContext->fGraphicsState.fCurPosX;
-    double y1 = pdfContext->fObjectStack.top()->numberValue();    pdfContext->fObjectStack.pop();
-    double x1 = pdfContext->fObjectStack.top()->numberValue();    pdfContext->fObjectStack.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;
-}
-
-static PdfResult PdfOp_re(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    if (pdfContext->fGraphicsState.fPathClosed) {
-        pdfContext->fGraphicsState.fPath.reset();
-        pdfContext->fGraphicsState.fPathClosed = false;
-    }
-
-    double height = pdfContext->fObjectStack.top()->numberValue();      pdfContext->fObjectStack.pop();
-    double width = pdfContext->fObjectStack.top()->numberValue();       pdfContext->fObjectStack.pop();
-    double y = pdfContext->fObjectStack.top()->numberValue();           pdfContext->fObjectStack.pop();
-    double x = pdfContext->fObjectStack.top()->numberValue();           pdfContext->fObjectStack.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;
-}
-
-static PdfResult PdfOp_h(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    pdfContext->fGraphicsState.fPath.close();
-    return kOK_PdfResult;
-}
-
-static 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;
-
-    SkPoint line[2];
-    if (fill && !stroke && path.isLine(line)) {
-        paint.setStyle(SkPaint::kStroke_Style);
-
-        pdfContext->fGraphicsState.applyGraphicsState(&paint, false);
-        paint.setStrokeWidth(SkDoubleToScalar(0));
-
-        canvas->drawPath(path, paint);
-    } else {
-        if (fill) {
-            paint.setStyle(SkPaint::kFill_Style);
-            if (evenOdd) {
-                path.setFillType(SkPath::kEvenOdd_FillType);
-            }
-
-            pdfContext->fGraphicsState.applyGraphicsState(&paint, false);
-
-            canvas->drawPath(path, paint);
-        }
-
-        if (stroke) {
-            paint.setStyle(SkPaint::kStroke_Style);
-
-            pdfContext->fGraphicsState.applyGraphicsState(&paint, true);
-
-            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;
-
-}
-
-static PdfResult PdfOp_S(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    return PdfOp_fillAndStroke(pdfContext, canvas, false, true, false, false);
-}
-
-static PdfResult PdfOp_s(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    return PdfOp_fillAndStroke(pdfContext, canvas, false, true, true, false);
-}
-
-static PdfResult PdfOp_F(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    return PdfOp_fillAndStroke(pdfContext, canvas, true, false, false, false);
-}
-
-static PdfResult PdfOp_f(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    return PdfOp_fillAndStroke(pdfContext, canvas, true, false, false, false);
-}
-
-static PdfResult PdfOp_f_star(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    return PdfOp_fillAndStroke(pdfContext, canvas, true, false, false, true);
-}
-
-static PdfResult PdfOp_B(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    return PdfOp_fillAndStroke(pdfContext, canvas, true, true, false, false);
-}
-
-static PdfResult PdfOp_B_star(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    return PdfOp_fillAndStroke(pdfContext, canvas, true, true, false, true);
-}
-
-static PdfResult PdfOp_b(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    return PdfOp_fillAndStroke(pdfContext, canvas, true, true, true, false);
-}
-
-static PdfResult PdfOp_b_star(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    return PdfOp_fillAndStroke(pdfContext, canvas, true, true, true, true);
-}
-
-static 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;
-}
-
-static 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;
-}
-
-static 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.
-static PdfResult PdfOp_Tf(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    pdfContext->fGraphicsState.fCurFontSize = pdfContext->fObjectStack.top()->numberValue();     pdfContext->fObjectStack.pop();
-    const char* fontName = pdfContext->fObjectStack.top()->nameValue();                           pdfContext->fObjectStack.pop();
-
-#ifdef PDF_TRACE
-    printf("font name: %s\n", fontName);
-#endif
-
-    if (pdfContext->fGraphicsState.fResources->Font(pdfContext->fPdfDoc)) {
-        SkPdfObject* objFont = pdfContext->fGraphicsState.fResources->Font(pdfContext->fPdfDoc)->get(fontName);
-        objFont = pdfContext->fPdfDoc->resolveReference(objFont);
-        if (kNone_SkPdfObjectType == pdfContext->fPdfDoc->mapper()->mapFontDictionary(objFont)) {
-            // TODO(edisonn): try to recover and draw it any way?
-            return kIgnoreError_PdfResult;
-        }
-        SkPdfFontDictionary* fd = (SkPdfFontDictionary*)objFont;
-
-        SkPdfFont* skfont = SkPdfFont::fontFromPdfDictionary(pdfContext->fPdfDoc, fd);
-
-        if (skfont) {
-            pdfContext->fGraphicsState.fSkFont = skfont;
-        }
-    }
-    return kIgnoreError_PdfResult;
-}
-
-static 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->fObjectStack.top(),
-                             canvas);
-    pdfContext->fObjectStack.pop();
-
-    return ret;
-}
-
-static 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);
-}
-
-static 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;
-    }
-
-    SkPdfObject* str = pdfContext->fObjectStack.top();       pdfContext->fObjectStack.pop();
-    SkPdfObject* ac = pdfContext->fObjectStack.top();        pdfContext->fObjectStack.pop();
-    SkPdfObject* aw = pdfContext->fObjectStack.top();        pdfContext->fObjectStack.pop();
-
-    pdfContext->fObjectStack.push(aw);
-    PdfOp_Tw(pdfContext, canvas, looper);
-
-    pdfContext->fObjectStack.push(ac);
-    PdfOp_Tc(pdfContext, canvas, looper);
-
-    pdfContext->fObjectStack.push(str);
-    PdfOp_quote(pdfContext, canvas, looper);
-
-    return kPartial_PdfResult;
-}
-
-static 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;
-    }
-
-    SkPdfArray* array = (SkPdfArray*)pdfContext->fObjectStack.top();
-    pdfContext->fObjectStack.pop();
-
-    if (!array->isArray()) {
-        return kIgnoreError_PdfResult;
-    }
-
-    for( int i=0; i<static_cast<int>(array->size()); i++ )
-    {
-        if( (*array)[i]->isAnyString()) {
-            SkPdfObject* obj = (*array)[i];
-            DrawText(pdfContext,
-                     obj,
-                     canvas);
-        } else if ((*array)[i]->isNumber()) {
-            double dx = (*array)[i]->numberValue();
-            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.
-}
-
-static PdfResult PdfOp_CS_cs(PdfContext* pdfContext, SkCanvas* canvas, SkPdfColorOperator* colorOperator) {
-    colorOperator->fColorSpace = pdfContext->fObjectStack.top()->nameValue();    pdfContext->fObjectStack.pop();
-    return kOK_PdfResult;
-}
-
-static PdfResult PdfOp_CS(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    return PdfOp_CS_cs(pdfContext, canvas, &pdfContext->fGraphicsState.fStroking);
-}
-
-static PdfResult PdfOp_cs(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    return PdfOp_CS_cs(pdfContext, canvas, &pdfContext->fGraphicsState.fNonStroking);
-}
-
-static PdfResult PdfOp_SC_sc(PdfContext* pdfContext, SkCanvas* canvas, SkPdfColorOperator* colorOperator) {
-    double c[4];
-//    int64_t v[4];
-
-    int n = GetColorSpaceComponents(colorOperator->fColorSpace);
-
-    bool doubles = true;
-    if (strcmp(colorOperator->fColorSpace, "Indexed") == 0) {
-        doubles = false;
-    }
-
-#ifdef PDF_TRACE
-    printf("color space = %s, N = %i\n", colorOperator->fColorSpace, n);
-#endif
-
-    for (int i = n - 1; i >= 0 ; i--) {
-        if (doubles) {
-            c[i] = pdfContext->fObjectStack.top()->numberValue();         pdfContext->fObjectStack.pop();
-//        } else {
-//            v[i] = pdfContext->fObjectStack.top()->intValue();        pdfContext->fObjectStack.pop();
-        }
-    }
-
-    // TODO(edisonn): Now, set that color. Only DeviceRGB supported.
-    // TODO(edisonn): do possible field values to enum at parsing time!
-    // TODO(edisonn): support also abreviations /DeviceRGB == /RGB
-    if (strcmp(colorOperator->fColorSpace, "DeviceRGB") == 0 || strcmp(colorOperator->fColorSpace, "RGB") == 0) {
-        colorOperator->setRGBColor(SkColorSetRGB(255*c[0], 255*c[1], 255*c[2]));
-    }
-    return kPartial_PdfResult;
-}
-
-static PdfResult PdfOp_SC(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    return PdfOp_SC_sc(pdfContext, canvas, &pdfContext->fGraphicsState.fStroking);
-}
-
-static PdfResult PdfOp_sc(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    return PdfOp_SC_sc(pdfContext, canvas, &pdfContext->fGraphicsState.fNonStroking);
-}
-
-static PdfResult PdfOp_SCN_scn(PdfContext* pdfContext, SkCanvas* canvas, SkPdfColorOperator* colorOperator) {
-    //SkPdfString* name;
-    if (pdfContext->fObjectStack.top()->isName()) {
-        // TODO(edisonn): get name, pass it
-        pdfContext->fObjectStack.pop();
-    }
-
-    // TODO(edisonn): SCN supports more color spaces than SCN. Read and implement spec.
-    PdfOp_SC_sc(pdfContext, canvas, colorOperator);
-
-    return kPartial_PdfResult;
-}
-
-static PdfResult PdfOp_SCN(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    return PdfOp_SCN_scn(pdfContext, canvas, &pdfContext->fGraphicsState.fStroking);
-}
-
-static PdfResult PdfOp_scn(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    return PdfOp_SCN_scn(pdfContext, canvas, &pdfContext->fGraphicsState.fNonStroking);
-}
-
-static PdfResult PdfOp_G_g(PdfContext* pdfContext, SkCanvas* canvas, SkPdfColorOperator* colorOperator) {
-    /*double gray = */pdfContext->fObjectStack.top()->numberValue();     pdfContext->fObjectStack.pop();
-    return kNYI_PdfResult;
-}
-
-static PdfResult PdfOp_G(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    return PdfOp_G_g(pdfContext, canvas, &pdfContext->fGraphicsState.fStroking);
-}
-
-static PdfResult PdfOp_g(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    return PdfOp_G_g(pdfContext, canvas, &pdfContext->fGraphicsState.fNonStroking);
-}
-
-static PdfResult PdfOp_RG_rg(PdfContext* pdfContext, SkCanvas* canvas, SkPdfColorOperator* colorOperator) {
-    double b = pdfContext->fObjectStack.top()->numberValue();     pdfContext->fObjectStack.pop();
-    double g = pdfContext->fObjectStack.top()->numberValue();     pdfContext->fObjectStack.pop();
-    double r = pdfContext->fObjectStack.top()->numberValue();     pdfContext->fObjectStack.pop();
-
-    colorOperator->fColorSpace = "DeviceRGB";
-    colorOperator->setRGBColor(SkColorSetRGB(255*r, 255*g, 255*b));
-    return kOK_PdfResult;
-}
-
-static PdfResult PdfOp_RG(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    return PdfOp_RG_rg(pdfContext, canvas, &pdfContext->fGraphicsState.fStroking);
-}
-
-static PdfResult PdfOp_rg(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    return PdfOp_RG_rg(pdfContext, canvas, &pdfContext->fGraphicsState.fNonStroking);
-}
-
-static PdfResult PdfOp_K_k(PdfContext* pdfContext, SkCanvas* canvas, SkPdfColorOperator* colorOperator) {
-    // TODO(edisonn): spec has some rules about overprint, implement them.
-    /*double k = */pdfContext->fObjectStack.top()->numberValue();     pdfContext->fObjectStack.pop();
-    /*double y = */pdfContext->fObjectStack.top()->numberValue();     pdfContext->fObjectStack.pop();
-    /*double m = */pdfContext->fObjectStack.top()->numberValue();     pdfContext->fObjectStack.pop();
-    /*double c = */pdfContext->fObjectStack.top()->numberValue();     pdfContext->fObjectStack.pop();
-
-    colorOperator->fColorSpace = "DeviceCMYK";
-    // TODO(edisonn): Set color.
-    return kNYI_PdfResult;
-}
-
-static PdfResult PdfOp_K(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    return PdfOp_K_k(pdfContext, canvas, &pdfContext->fGraphicsState.fStroking);
-}
-
-static PdfResult PdfOp_k(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    return PdfOp_K_k(pdfContext, canvas, &pdfContext->fGraphicsState.fNonStroking);
-}
-
-static PdfResult PdfOp_W(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    pdfContext->fGraphicsState.fClipPath = pdfContext->fGraphicsState.fPath;
-    pdfContext->fGraphicsState.fHasClipPathToApply = true;
-
-    return kOK_PdfResult;
-}
-
-static 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;
-}
-
-static PdfResult PdfOp_BX(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    *looper = new PdfCompatibilitySectionLooper();
-    return kOK_PdfResult;
-}
-
-static 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;
-}
-
-static PdfResult PdfOp_BI(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    *looper = new PdfInlineImageLooper();
-    return kOK_PdfResult;
-}
-
-static 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;
-}
-
-static 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).
-static PdfResult PdfOp_w(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    double lineWidth = pdfContext->fObjectStack.top()->numberValue();     pdfContext->fObjectStack.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).
-static PdfResult PdfOp_J(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    pdfContext->fObjectStack.pop();
-    //double lineCap = pdfContext->fObjectStack.top()->numberValue();     pdfContext->fObjectStack.pop();
-
-    return kNYI_PdfResult;
-}
-
-//lineJoin j Set the line join style in the graphics state (see “Line Join Style” on page 153).
-static PdfResult PdfOp_j(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    pdfContext->fObjectStack.pop();
-    //double lineJoin = pdfContext->fObjectStack.top()->numberValue();     pdfContext->fObjectStack.pop();
-
-    return kNYI_PdfResult;
-}
-
-//miterLimit M Set the miter limit in the graphics state (see “Miter Limit” on page 153).
-static PdfResult PdfOp_M(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    pdfContext->fObjectStack.pop();
-    //double miterLimit = pdfContext->fObjectStack.top()->numberValue();     pdfContext->fObjectStack.pop();
-
-    return kNYI_PdfResult;
-}
-
-//dashArray dashPhase d Set the line dash pattern in the graphics state (see “Line Dash Pattern” on
-//page 155).
-static PdfResult PdfOp_d(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    pdfContext->fObjectStack.pop();
-    pdfContext->fObjectStack.pop();
-
-    return kNYI_PdfResult;
-}
-
-//intent ri (PDF 1.1) Set the color rendering intent in the graphics state (see “Rendering Intents” on page 197).
-static PdfResult PdfOp_ri(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    pdfContext->fObjectStack.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.
-static PdfResult PdfOp_i(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    pdfContext->fObjectStack.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).
-static PdfResult PdfOp_gs(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    const char* name = pdfContext->fObjectStack.top()->nameValue();    pdfContext->fObjectStack.pop();
-
-#ifdef PDF_TRACE
-    std::string str;
-#endif
-
-    //Next, get the ExtGState Dictionary from the Resource Dictionary:
-    SkPdfDictionary* extGStateDictionary = pdfContext->fGraphicsState.fResources->ExtGState(pdfContext->fPdfDoc);
-
-    if (extGStateDictionary == NULL) {
-#ifdef PDF_TRACE
-        printf("ExtGState is NULL!\n");
-#endif
-        return kIgnoreError_PdfResult;
-    }
-
-    SkPdfObject* value = pdfContext->fPdfDoc->resolveReference(extGStateDictionary->get(name));
-
-    if (kNone_SkPdfObjectType == pdfContext->fPdfDoc->mapper()->mapGraphicsStateDictionary(value)) {
-        return kIgnoreError_PdfResult;
-    }
-    SkPdfGraphicsStateDictionary* gs = (SkPdfGraphicsStateDictionary*)value;
-
-    // TODO(edisonn): now load all those properties in graphic state.
-    if (gs == NULL) {
-        return kIgnoreError_PdfResult;
-    }
-
-    if (gs->has_CA()) {
-        pdfContext->fGraphicsState.fStroking.fOpacity = gs->CA(pdfContext->fPdfDoc);
-    }
-
-    if (gs->has_ca()) {
-        pdfContext->fGraphicsState.fNonStroking.fOpacity = gs->ca(pdfContext->fPdfDoc);
-    }
-
-    if (gs->has_LW()) {
-        pdfContext->fGraphicsState.fLineWidth = gs->LW(pdfContext->fPdfDoc);
-    }
-
-    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->fObjectStack.top()->numberValue();     pdfContext->fObjectStack.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->fObjectStack.top()->numberValue();     pdfContext->fObjectStack.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).
-static PdfResult PdfOp_Tz(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    /*double scale = */pdfContext->fObjectStack.top()->numberValue();     pdfContext->fObjectStack.pop();
-
-    return kNYI_PdfResult;
-}
-
-//render Tr Set the text rendering mode, T
-//mode, to render, which is an integer. Initial value: 0.
-static PdfResult PdfOp_Tr(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    /*double render = */pdfContext->fObjectStack.top()->numberValue();     pdfContext->fObjectStack.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.
-static PdfResult PdfOp_Ts(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    /*double rise = */pdfContext->fObjectStack.top()->numberValue();     pdfContext->fObjectStack.pop();
-
-    return kNYI_PdfResult;
-}
-
-//wx wy d0
-static PdfResult PdfOp_d0(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    pdfContext->fObjectStack.pop();
-    pdfContext->fObjectStack.pop();
-
-    return kNYI_PdfResult;
-}
-
-//wx wy llx lly urx ury d1
-static PdfResult PdfOp_d1(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    pdfContext->fObjectStack.pop();
-    pdfContext->fObjectStack.pop();
-    pdfContext->fObjectStack.pop();
-    pdfContext->fObjectStack.pop();
-    pdfContext->fObjectStack.pop();
-    pdfContext->fObjectStack.pop();
-
-    return kNYI_PdfResult;
-}
-
-//name sh
-static PdfResult PdfOp_sh(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    pdfContext->fObjectStack.pop();
-
-    return kNYI_PdfResult;
-}
-
-//name Do
-static PdfResult PdfOp_Do(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    const char* name = pdfContext->fObjectStack.top()->nameValue();    pdfContext->fObjectStack.pop();
-
-    SkPdfDictionary* xObject =  pdfContext->fGraphicsState.fResources->XObject(pdfContext->fPdfDoc);
-
-    if (xObject == NULL) {
-#ifdef PDF_TRACE
-        printf("XObject is NULL!\n");
-#endif
-        return kIgnoreError_PdfResult;
-    }
-
-    SkPdfObject* value = xObject->get(name);
-    value = pdfContext->fPdfDoc->resolveReference(value);
-
-#ifdef PDF_TRACE
-//    value->ToString(str);
-//    printf("Do object value: %s\n", 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.
-static PdfResult PdfOp_MP(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    pdfContext->fObjectStack.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”).
-static PdfResult PdfOp_DP(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    pdfContext->fObjectStack.pop();
-    pdfContext->fObjectStack.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.
-static PdfResult PdfOp_BMC(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    pdfContext->fObjectStack.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”).
-static PdfResult PdfOp_BDC(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    pdfContext->fObjectStack.pop();
-    pdfContext->fObjectStack.pop();
-
-    return kNYI_PdfResult;
-}
-
-//— EMC End a marked-content sequence begun by a BMC or BDC operator.
-static PdfResult PdfOp_EMC(PdfContext* pdfContext, SkCanvas* canvas, PdfTokenLooper** looper) {
-    return kNYI_PdfResult;
-}
-
-static 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;
-}
-
-class InitPdfOps {
-public:
-    InitPdfOps() {
-        initPdfOperatorRenderes();
-    }
-};
-
-InitPdfOps gInitPdfOps;
-
-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) {
-    char keyword[256];
-
-    if (token.fType == kKeyword_TokenType && token.fKeywordLength < 256)
-    {
-        strncpy(keyword, token.fKeyword, token.fKeywordLength);
-        keyword[token.fKeywordLength] = '\0';
-        // TODO(edisonn): log trace flag (verbose, error, info, warning, ...)
-        PdfOperatorRenderer pdfOperatorRenderer = gPdfOps[keyword];
-        if (pdfOperatorRenderer) {
-            // caller, main work is done by pdfOperatorRenderer(...)
-            PdfTokenLooper* childLooper = NULL;
-            gRenderStats[pdfOperatorRenderer(fPdfContext, fCanvas, &childLooper)][keyword]++;
-
-            if (childLooper) {
-                childLooper->setUp(this);
-                childLooper->loop();
-                delete childLooper;
-            }
-        } else {
-            gRenderStats[kUnsupported_PdfResult][keyword]++;
-        }
-    }
-    else if (token.fType == kObject_TokenType)
-    {
-        fPdfContext->fObjectStack.push( token.fObject );
-    }
-    else {
-        // TODO(edisonn): deine or use assert not reached
-        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.fType == kKeyword_TokenType && strcmp(token.fKeyword, "BX") == 0) {
-            PdfTokenLooper* looper = new PdfCompatibilitySectionLooper();
-            looper->setUp(this);
-            looper->loop();
-        } else {
-            if (token.fType == kKeyword_TokenType && strcmp(token.fKeyword, "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.fType == kKeyword_TokenType && strcmp(token.fKeyword, "BX") == 0) {
-            PdfTokenLooper* looper = new PdfCompatibilitySectionLooper();
-            looper->setUp(this);
-            looper->loop();
-            delete looper;
-        } else {
-            if (token.fType == kKeyword_TokenType && strcmp(token.fKeyword, "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)
-// TODO (edisonn): Add intend when loading pdf, for example: for viewing, parsing all content, ...
-// if we load the first page, and we zoom to fit to screen horizontally, then load only those
-// resources needed, so the preview is fast.
-// TODO (edisonn): hide parser/tokenizer behind and interface and a query language, and resolve
-// references automatically.
-
-bool SkPdfViewer::load(const SkString inputFileName, SkPicture* out) {
-    std::cout << "PDF Loaded: " << inputFileName.c_str() << std::endl;
-
-    SkNativeParsedPDF* doc = new SkNativeParsedPDF(inputFileName.c_str());
-    if (!doc->pages())
-    {
-        std::cout << "ERROR: Empty PDF Document" << inputFileName.c_str() << std::endl;
-        return false;
-    } else {
-
-        for (int pn = 0; pn < doc->pages(); ++pn) {
-            // TODO(edisonn): implement inheritance properties as per PDF spec
-            //SkRect rect = page->MediaBox();
-            SkRect rect = doc->MediaBox(pn);
-
-#ifdef PDF_TRACE
-            printf("Page Width: %f, Page Height: %f\n", SkScalarToDouble(rect.width()), SkScalarToDouble(rect.height()));
-#endif
-
-            // TODO(edisonn): page->GetCropBox(), page->GetTrimBox() ... how to use?
-
-            SkBitmap bitmap;
-#ifdef PDF_DEBUG_3X
-            setup_bitmap(&bitmap, 3 * (int)SkScalarToDouble(rect.width()), 3 * (int)SkScalarToDouble(rect.height()));
-#else
-            setup_bitmap(&bitmap, (int)SkScalarToDouble(rect.width()), (int)SkScalarToDouble(rect.height()));
-#endif
-            SkAutoTUnref<SkDevice> device(SkNEW_ARGS(SkDevice, (bitmap)));
-            SkCanvas canvas(device);
-
-            gDumpBitmap = &bitmap;
-
-            gDumpCanvas = &canvas;
-            doc->drawPage(pn, &canvas);
-
-            SkString out;
-            if (doc->pages() > 1) {
-                out.appendf("%s-%i.png", inputFileName.c_str(), pn);
-            } else {
-                out = inputFileName;
-                // .pdf -> .png
-                out[out.size() - 2] = 'n';
-                out[out.size() - 1] = 'g';
-            }
-            SkImageEncoder::EncodeFile(out.c_str(), bitmap, SkImageEncoder::kPNG_Type, 100);
-        }
-        return true;
-    }
-
-    return true;
-}