Diffstat (limited to 'noncore/unsupported/qpdf/xpdf/Page.cc') (more/less context) (ignore whitespace changes)
| -rw-r--r-- | noncore/unsupported/qpdf/xpdf/Page.cc | 267 |
1 files changed, 267 insertions, 0 deletions
diff --git a/noncore/unsupported/qpdf/xpdf/Page.cc b/noncore/unsupported/qpdf/xpdf/Page.cc new file mode 100644 index 0000000..17c4481 --- a/dev/null +++ b/noncore/unsupported/qpdf/xpdf/Page.cc @@ -0,0 +1,267 @@ +//======================================================================== +// +// Page.cc +// +// Copyright 1996 Derek B. Noonburg +// +//======================================================================== + +#ifdef __GNUC__ +#pragma implementation +#endif + +#include <aconf.h> +#include <stddef.h> +#include "Object.h" +#include "Array.h" +#include "Dict.h" +#include "XRef.h" +#include "Link.h" +#include "OutputDev.h" +#ifndef PDF_PARSER_ONLY +#include "Gfx.h" +#include "FormWidget.h" +#endif +#include "Error.h" +#include "Page.h" + +//------------------------------------------------------------------------ +// PageAttrs +//------------------------------------------------------------------------ + +PageAttrs::PageAttrs(PageAttrs *attrs, Dict *dict) { + Object obj1; + fouble w, h; + + // get old/default values + if (attrs) { + mediaBox = attrs->mediaBox; + cropBox = attrs->cropBox; + haveCropBox = attrs->haveCropBox; + rotate = attrs->rotate; + attrs->resources.copy(&resources); + } else { + // set default MediaBox to 8.5" x 11" -- this shouldn't be necessary + // but some (non-compliant) PDF files don't specify a MediaBox + mediaBox.x1 = 0; + mediaBox.y1 = 0; + mediaBox.x2 = 612; + mediaBox.y2 = 792; + cropBox.x1 = cropBox.y1 = cropBox.x2 = cropBox.y2 = 0; + haveCropBox = gFalse; + rotate = 0; + resources.initNull(); + } + + // media box + readBox(dict, "MediaBox", &mediaBox); + + // crop box + cropBox = mediaBox; + haveCropBox = readBox(dict, "CropBox", &cropBox); + + // if the MediaBox is excessively larger than the CropBox, + // just use the CropBox + limitToCropBox = gFalse; + if (haveCropBox) { + w = 0.25 * (cropBox.x2 - cropBox.x1); + h = 0.25 * (cropBox.y2 - cropBox.y1); + if ((cropBox.x1 - mediaBox.x1) + (mediaBox.x2 - cropBox.x2) > w || + (cropBox.y1 - mediaBox.y1) + (mediaBox.y2 - cropBox.y2) > h) { + limitToCropBox = gTrue; + } + } + + // other boxes + bleedBox = cropBox; + readBox(dict, "BleedBox", &bleedBox); + trimBox = cropBox; + readBox(dict, "TrimBox", &trimBox); + artBox = cropBox; + readBox(dict, "ArtBox", &artBox); + + // rotate + dict->lookup("Rotate", &obj1); + if (obj1.isInt()) { + rotate = obj1.getInt(); + } + obj1.free(); + while (rotate < 0) { + rotate += 360; + } + while (rotate >= 360) { + rotate -= 360; + } + + // resource dictionary + dict->lookup("Resources", &obj1); + if (obj1.isDict()) { + resources.free(); + obj1.copy(&resources); + } + obj1.free(); +} + +PageAttrs::~PageAttrs() { + resources.free(); +} + +GBool PageAttrs::readBox(Dict *dict, char *key, PDFRectangle *box) { + PDFRectangle tmp; + Object obj1, obj2; + GBool ok; + + dict->lookup(key, &obj1); + if (obj1.isArray() && obj1.arrayGetLength() == 4) { + ok = gTrue; + obj1.arrayGet(0, &obj2); + if (obj2.isNum()) { + tmp.x1 = obj2.getNum(); + } else { + ok = gFalse; + } + obj2.free(); + obj1.arrayGet(1, &obj2); + if (obj2.isNum()) { + tmp.y1 = obj2.getNum(); + } else { + ok = gFalse; + } + obj2.free(); + obj1.arrayGet(2, &obj2); + if (obj2.isNum()) { + tmp.x2 = obj2.getNum(); + } else { + ok = gFalse; + } + obj2.free(); + obj1.arrayGet(3, &obj2); + if (obj2.isNum()) { + tmp.y2 = obj2.getNum(); + } else { + ok = gFalse; + } + obj2.free(); + if (ok) { + *box = tmp; + } + } else { + ok = gFalse; + } + obj1.free(); + return ok; +} + +//------------------------------------------------------------------------ +// Page +//------------------------------------------------------------------------ + +Page::Page(XRef *xrefA, int numA, Dict *pageDict, PageAttrs *attrsA, + GBool printCommandsA) { + + ok = gTrue; + xref = xrefA; + num = numA; + printCommands = printCommandsA; + + // get attributes + attrs = attrsA; + + // annotations + pageDict->lookupNF("Annots", &annots); + if (!(annots.isRef() || annots.isArray() || annots.isNull())) { + error(-1, "Page annotations object (page %d) is wrong type (%s)", + num, annots.getTypeName()); + annots.free(); + goto err2; + } + + // contents + pageDict->lookupNF("Contents", &contents); + if (!(contents.isRef() || contents.isArray() || + contents.isNull())) { + error(-1, "Page contents object (page %d) is wrong type (%s)", + num, contents.getTypeName()); + contents.free(); + goto err1; + } + + return; + + err2: + annots.initNull(); + err1: + contents.initNull(); + ok = gFalse; +} + +Page::~Page() { + delete attrs; + annots.free(); + contents.free(); +} + +void Page::display(OutputDev *out, fouble dpi, int rotate, + Links *links, Catalog *catalog) { +#ifndef PDF_PARSER_ONLY + PDFRectangle *box, *cropBox; + Gfx *gfx; + Object obj; + Link *link; + int i; + FormWidgets *formWidgets; + + box = getBox(); + cropBox = getCropBox(); + + if (printCommands) { + printf("***** MediaBox = ll:%g,%g ur:%g,%g\n", + box->x1, box->y1, box->x2, box->y2); + if (isCropped()) { + printf("***** CropBox = ll:%g,%g ur:%g,%g\n", + cropBox->x1, cropBox->y1, cropBox->x2, cropBox->y2); + } + printf("***** Rotate = %d\n", attrs->getRotate()); + } + + rotate += getRotate(); + if (rotate >= 360) { + rotate -= 360; + } else if (rotate < 0) { + rotate += 360; + } + gfx = new Gfx(xref, out, num, attrs->getResourceDict(), + dpi, box, isCropped(), cropBox, rotate, printCommands); + contents.fetch(xref, &obj); + if (!obj.isNull()) { + gfx->display(&obj); + } + obj.free(); + + // draw links + if (links) { + for (i = 0; i < links->getNumLinks(); ++i) { + link = links->getLink(i); + out->drawLink(link, catalog); + } + out->dump(); + } + + // draw AcroForm widgets + //~ need to reset CTM ??? + formWidgets = new FormWidgets(xref, annots.fetch(xref, &obj)); + obj.free(); + if (printCommands && formWidgets->getNumWidgets() > 0) { + printf("***** AcroForm widgets\n"); + } + for (i = 0; i < formWidgets->getNumWidgets(); ++i) { + formWidgets->getWidget(i)->draw(gfx); + } + if (formWidgets->getNumWidgets() > 0) { + out->dump(); + } + delete formWidgets; + + delete gfx; +#endif +} |