isolate podofo to prepare for native parser, autogenerate PDF API during build

experimental/PdfViewer/pdfparser/podofo/SkPodofoParsedPDF.cpp

+#include "SkPodofoParsedPDF.h"
+
+#include "SkPdfPodofoTokenizer.h"
+#include "SkPdfHeaders_autogen.h"
+#include "SkPdfMapper_autogen.h"
+#include "SkPdfBasics.h"
+#include "SkPdfParser.h"
+
+#include "podofo.h"
+
+SkPodofoParsedPDF::SkPodofoParsedPDF(const char* path) : fDoc(new PoDoFo::PdfMemDocument(path))
+                                                       , fMapper(new SkPdfMapper(this)) {}
+
+SkPodofoParsedPDF::~SkPodofoParsedPDF() {
+    delete fDoc;
+    delete fMapper;
+}
+
+int SkPodofoParsedPDF::pages() const {
+    return fDoc->GetPageCount();
+}
+
+double SkPodofoParsedPDF::width(int page) const {
+    PoDoFo::PdfRect rect = fDoc->GetPage(page)->GetMediaBox();
+    return rect.GetWidth() + rect.GetLeft();
+}
+
+double SkPodofoParsedPDF::height(int page) const {
+    PoDoFo::PdfRect rect = fDoc->GetPage(page)->GetMediaBox();
+    return rect.GetHeight() + rect.GetBottom();
+}
+
+const SkPdfResourceDictionary* SkPodofoParsedPDF::pageResources(int page) const {
+    SkPdfPageObjectDictionary* pg = NULL;
+    SkPdfObject* obj = make(fDoc->GetPage(page)->GetObject());
+    fMapper->mapPageObjectDictionary(obj, &pg);
+    return pg ? pg->Resources() : NULL;
+}
+
+SkRect SkPodofoParsedPDF::MediaBox(int page) const {
+    PoDoFo::PdfRect rect = fDoc->GetPage(page)->GetMediaBox();
+    SkRect skrect = SkRect::MakeLTRB(SkDoubleToScalar(rect.GetLeft()),
+                                     SkDoubleToScalar(rect.GetBottom()),
+                                     SkDoubleToScalar(rect.GetLeft() + rect.GetWidth()),
+                                     SkDoubleToScalar(rect.GetBottom() + rect.GetHeight()));
+    return skrect;
+}
+
+
+SkPdfPodofoTokenizer* SkPodofoParsedPDF::tokenizerOfPage(int page) const {
+    PoDoFo::PdfContentsTokenizer* t = new PoDoFo::PdfContentsTokenizer(fDoc->GetPage(page));
+    return new SkPdfPodofoTokenizer(this, t);
+}
+
+SkPdfPodofoTokenizer* SkPodofoParsedPDF::tokenizerOfStream(const SkPdfStream* stream) const {
+    if (stream == NULL) {
+        return NULL;
+    }
+
+    char* buffer = NULL;
+    long len = 0;
+    stream->GetFilteredCopy(&buffer, &len);
+    return tokenizerOfBuffer(buffer, len);
+}
+
+SkPdfPodofoTokenizer* SkPodofoParsedPDF::tokenizerOfBuffer(char* buffer, size_t len) const {
+    PoDoFo::PdfContentsTokenizer* t = new PoDoFo::PdfContentsTokenizer(buffer, len);
+    return new SkPdfPodofoTokenizer(this, t);
+}
+
+size_t SkPodofoParsedPDF::objects() const {
+    return fDoc->GetObjects().GetSize();
+}
+
+const SkPdfObject* SkPodofoParsedPDF::object(int i) const {
+    PoDoFo::PdfVecObjects& objects = (PoDoFo::PdfVecObjects&)fDoc->GetObjects();
+    return make(objects[i]);
+}
+
+SkPdfObject* SkPodofoParsedPDF::make(PoDoFo::PdfObject* obj) const {
+    return new SkPdfObject(this, obj);
+}
+
+const SkPdfObject* SkPodofoParsedPDF::make(const PoDoFo::PdfObject* obj) const {
+    return new SkPdfObject(this, obj);
+}
+
+const SkPdfMapper* SkPodofoParsedPDF::mapper() const {
+    return fMapper;
+}
+
+SkPdfNumber* SkPodofoParsedPDF::createNumber(double number) const {
+    return new SkPdfNumber(this, new PoDoFo::PdfObject(PoDoFo::PdfVariant(number)));
+}
+
+SkPdfInteger* SkPodofoParsedPDF::createInteger(int value) const {
+    return new SkPdfInteger(this, new PoDoFo::PdfObject(PoDoFo::PdfVariant((PoDoFo::pdf_int64)value)));
+}
+
+SkPdfString* SkPodofoParsedPDF::createString(char* sz, size_t len) const {
+    // TODO(edisonn): NYI
+    return NULL;
+}
+
+PdfContext* gPdfContext = NULL;
+
+void SkPodofoParsedPDF::drawPage(int page, SkCanvas* canvas) const {
+    SkPdfPodofoTokenizer* tokenizer = tokenizerOfPage(page);
+
+    PdfContext pdfContext(this);
+    pdfContext.fOriginalMatrix = SkMatrix::I();
+    pdfContext.fGraphicsState.fResources = pageResources(page);
+
+    gPdfContext = &pdfContext;
+
+    // TODO(edisonn): get matrix stuff right.
+    // TODO(edisonn): add DPI/scale/zoom.
+    SkScalar z = SkIntToScalar(0);
+    SkRect rect = MediaBox(page);
+    SkScalar w = rect.width();
+    SkScalar h = rect.height();
+
+    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)};
+
+    SkAssertResult(pdfContext.fOriginalMatrix.setPolyToPoly(pdfSpace, skiaSpace, 4));
+    SkTraceMatrix(pdfContext.fOriginalMatrix, "Original matrix");
+
+
+    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
+
+// erase with red before?
+//        SkPaint paint;
+//        paint.setColor(SK_ColorRED);
+//        canvas->drawRect(rect, paint);
+
+    PdfMainLooper looper(NULL, tokenizer, &pdfContext, canvas);
+    looper.loop();
+
+    delete tokenizer;
+
+    canvas->flush();
+}
+
+// TODO(edisonn): move in trace util.
+#include "SkMatrix.h"
+#include "SkRect.h"
+
+#ifdef PDF_TRACE
+void SkTraceMatrix(const SkMatrix& matrix, const char* sz) {
+    printf("SkMatrix %s ", sz);
+    for (int i = 0 ; i < 9 ; i++) {
+        printf("%f ", SkScalarToDouble(matrix.get(i)));
+    }
+    printf("\n");
+}
+
+void SkTraceRect(const SkRect& rect, const char* sz) {
+    printf("SkRect %s ", sz);
+    printf("x = %f ", SkScalarToDouble(rect.x()));
+    printf("y = %f ", SkScalarToDouble(rect.y()));
+    printf("w = %f ", SkScalarToDouble(rect.width()));
+    printf("h = %f ", SkScalarToDouble(rect.height()));
+    printf("\n");
+}
+#endif
+