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//========================================================================
//
// Page.cc
//
// Copyright 1996-2003 Glyph & Cog, LLC
//
//========================================================================
#include <aconf.h>
#ifdef USE_GCC_PRAGMAS
#pragma implementation
#endif
#include <stddef.h>
#include "GlobalParams.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 "Annot.h"
#endif
#include "Error.h"
#include "Page.h"
//------------------------------------------------------------------------
// PageAttrs
//------------------------------------------------------------------------
PageAttrs::PageAttrs(PageAttrs *attrs, Dict *dict) {
Object obj1;
double 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
if (readBox(dict, "CropBox", &cropBox)) {
haveCropBox = gTrue;
}
if (!haveCropBox) {
cropBox = mediaBox;
}
// 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;
}
// misc attributes
dict->lookup("LastModified", &lastModified);
dict->lookup("BoxColorInfo", &boxColorInfo);
dict->lookup("Group", &group);
dict->lookup("Metadata", &metadata);
dict->lookup("PieceInfo", &pieceInfo);
dict->lookup("SeparationInfo", &separationInfo);
// resource dictionary
dict->lookup("Resources", &obj1);
if (obj1.isDict()) {
resources.free();
obj1.copy(&resources);
}
obj1.free();
}
PageAttrs::~PageAttrs() {
lastModified.free();
boxColorInfo.free();
group.free();
metadata.free();
pieceInfo.free();
separationInfo.free();
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) {
ok = gTrue;
xref = xrefA;
num = numA;
// 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;
}
// thumb
pageDict->lookupNF("Thumb", &thumb);
if (!(thumb.isStream() || thumb.isNull() || thumb.isRef())) {
error(-1, "Page thumb object (page %d) is wrong type (%s)",
num, thumb.getTypeName());
thumb.initNull();
}
return;
err2:
annots.initNull();
err1:
contents.initNull();
ok = gFalse;
}
Page::~Page() {
delete attrs;
annots.free();
contents.free();
}
void Page::display(OutputDev *out, double hDPI, double vDPI,
int rotate, GBool crop,
Links *links, Catalog *catalog,
GBool (*abortCheckCbk)(void *data),
void *abortCheckCbkData,
GBool (*annotDisplayDecideCbk)(Annot *annot, void *user_data),
void *annotDisplayDecideCbkData) {
displaySlice(out, hDPI, vDPI, rotate, crop, -1, -1, -1, -1, links, catalog,
abortCheckCbk, abortCheckCbkData,
annotDisplayDecideCbk, annotDisplayDecideCbkData);
}
void Page::displaySlice(OutputDev *out, double hDPI, double vDPI,
int rotate, GBool crop,
int sliceX, int sliceY, int sliceW, int sliceH,
Links *links, Catalog *catalog,
GBool (*abortCheckCbk)(void *data),
void *abortCheckCbkData,
GBool (*annotDisplayDecideCbk)(Annot *annot, void *user_data),
void *annotDisplayDecideCbkData) {
#ifndef PDF_PARSER_ONLY
PDFRectangle *mediaBox, *cropBox;
PDFRectangle box;
Gfx *gfx;
Object obj;
Link *link;
Annots *annotList;
double kx, ky;
int i;
rotate += getRotate();
if (rotate >= 360) {
rotate -= 360;
} else if (rotate < 0) {
rotate += 360;
}
mediaBox = getBox();
if (sliceW >= 0 && sliceH >= 0) {
kx = 72.0 / hDPI;
ky = 72.0 / vDPI;
if (rotate == 90) {
if (out->upsideDown()) {
box.x1 = mediaBox->x1 + ky * sliceY;
box.x2 = mediaBox->x1 + ky * (sliceY + sliceH);
} else {
box.x1 = mediaBox->x2 - ky * (sliceY + sliceH);
box.x2 = mediaBox->x2 - ky * sliceY;
}
box.y1 = mediaBox->y1 + kx * sliceX;
box.y2 = mediaBox->y1 + kx * (sliceX + sliceW);
} else if (rotate == 180) {
box.x1 = mediaBox->x2 - kx * (sliceX + sliceW);
box.x2 = mediaBox->x2 - kx * sliceX;
if (out->upsideDown()) {
box.y1 = mediaBox->y1 + ky * sliceY;
box.y2 = mediaBox->y1 + ky * (sliceY + sliceH);
} else {
box.y1 = mediaBox->y2 - ky * (sliceY + sliceH);
box.y2 = mediaBox->y2 - ky * sliceY;
}
} else if (rotate == 270) {
if (out->upsideDown()) {
box.x1 = mediaBox->x2 - ky * (sliceY + sliceH);
box.x2 = mediaBox->x2 - ky * sliceY;
} else {
box.x1 = mediaBox->x1 + ky * sliceY;
box.x2 = mediaBox->x1 + ky * (sliceY + sliceH);
}
box.y1 = mediaBox->y2 - kx * (sliceX + sliceW);
box.y2 = mediaBox->y2 - kx * sliceX;
} else {
box.x1 = mediaBox->x1 + kx * sliceX;
box.x2 = mediaBox->x1 + kx * (sliceX + sliceW);
if (out->upsideDown()) {
box.y1 = mediaBox->y2 - ky * (sliceY + sliceH);
box.y2 = mediaBox->y2 - ky * sliceY;
} else {
box.y1 = mediaBox->y1 + ky * sliceY;
box.y2 = mediaBox->y1 + ky * (sliceY + sliceH);
}
}
} else {
box = *mediaBox;
}
cropBox = getCropBox();
if (globalParams->getPrintCommands()) {
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());
}
gfx = new Gfx(xref, out, num, attrs->getResourceDict(),
hDPI, vDPI, &box, crop && isCropped(), cropBox, rotate,
abortCheckCbk, abortCheckCbkData);
contents.fetch(xref, &obj);
if (!obj.isNull()) {
gfx->saveState();
gfx->display(&obj);
gfx->restoreState();
}
obj.free();
// draw links
if (links) {
gfx->saveState();
for (i = 0; i < links->getNumLinks(); ++i) {
link = links->getLink(i);
out->drawLink(link, catalog);
}
gfx->restoreState();
out->dump();
}
// draw non-link annotations
annotList = new Annots(xref, annots.fetch(xref, &obj));
obj.free();
#ifdef USE_ANNOTS_VIEW
if (annotList->getNumAnnots() > 0) {
if (globalParams->getPrintCommands()) {
printf("***** Annotations\n");
}
for (i = 0; i < annotList->getNumAnnots(); ++i) {
Annot *annot = annotList->getAnnot(i);
if ((annotDisplayDecideCbk &&
(*annotDisplayDecideCbk)(annot, annotDisplayDecideCbkData)) ||
!annotDisplayDecideCbk)
annot->draw(gfx);
}
out->dump();
}
#endif
delete annotList;
delete gfx;
#endif
}
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