Initial revision

1 files changed, 214 insertions, 0 deletions

diff --git a/pdf/xpdf/Page.cc b/pdf/xpdf/Page.cc
new file mode 100644
index 0000000..d09170a
--- /dev/null
+++ b/pdf/xpdf/Page.cc
@@ -0,0 +1,214 @@
+//========================================================================
+//
+// Page.cc
+//
+// Copyright 1996 Derek B. Noonburg
+//
+//========================================================================
+
+#ifdef __GNUC__
+#pragma implementation
+#endif
+
+#include <stddef.h>
+#include "Object.h"
+#include "Array.h"
+#include "Dict.h"
+#include "XRef.h"
+#include "OutputDev.h"
+#ifndef PDF_PARSER_ONLY
+#include "Gfx.h"
+#endif
+#include "Error.h"
+
+#include "Params.h"
+#include "Page.h"
+
+//------------------------------------------------------------------------
+// PageAttrs
+//------------------------------------------------------------------------
+
+PageAttrs::PageAttrs(PageAttrs *attrs, Dict *dict) {
+  Object obj1, obj2;
+  double w, h;
+
+  // get old/default values
+  if (attrs) {
+    x1 = attrs->x1;
+    y1 = attrs->y1;
+    x2 = attrs->x2;
+    y2 = attrs->y2;
+    cropX1 = attrs->cropX1;
+    cropY1 = attrs->cropY1;
+    cropX2 = attrs->cropX2;
+    cropY2 = attrs->cropY2;
+    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
+    x1 = 0;
+    y1 = 0;
+    x2 = 612;
+    y2 = 792;
+    cropX1 = cropY1 = cropX2 = cropY2 = 0;
+    rotate = 0;
+    resources.initNull();
+  }
+
+  // media box
+  dict->lookup("MediaBox", &obj1);
+  if (obj1.isArray() && obj1.arrayGetLength() == 4) {
+    obj1.arrayGet(0, &obj2);
+    if (obj2.isNum())
+      x1 = obj2.getNum();
+    obj2.free();
+    obj1.arrayGet(1, &obj2);
+    if (obj2.isNum())
+      y1 = obj2.getNum();
+    obj2.free();
+    obj1.arrayGet(2, &obj2);
+    if (obj2.isNum())
+      x2 = obj2.getNum();
+    obj2.free();
+    obj1.arrayGet(3, &obj2);
+    if (obj2.isNum())
+      y2 = obj2.getNum();
+    obj2.free();
+  }
+  obj1.free();
+
+  // crop box
+  dict->lookup("CropBox", &obj1);
+  if (obj1.isArray() && obj1.arrayGetLength() == 4) {
+    obj1.arrayGet(0, &obj2);
+    if (obj2.isNum())
+      cropX1 = obj2.getNum();
+    obj2.free();
+    obj1.arrayGet(1, &obj2);
+    if (obj2.isNum())
+      cropY1 = obj2.getNum();
+    obj2.free();
+    obj1.arrayGet(2, &obj2);
+    if (obj2.isNum())
+      cropX2 = obj2.getNum();
+    obj2.free();
+    obj1.arrayGet(3, &obj2);
+    if (obj2.isNum())
+      cropY2 = obj2.getNum();
+    obj2.free();
+
+    // if the MediaBox is excessively larger than the CropBox,
+    // just use the CropBox
+    w = 0.25 * (cropX2 - cropX1);
+    h = 0.25 * (cropY2 - cropY1);
+    if (cropX1 - x1 > w || x2 - cropX2 > w ||
+	cropY1 - y1 > h || y2 - cropY2 > h) {
+      x1 = cropX1;
+      x2 = cropX2;
+      y1 = cropY1;
+      y2 = cropY2;
+    }
+  } else {
+    cropX1 = cropX2 = cropY1 = cropY2 = 0;
+  }
+  obj1.free();
+
+  // 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();
+}
+
+//------------------------------------------------------------------------
+// Page
+//------------------------------------------------------------------------
+
+Page::Page(int num1, Dict *pageDict, PageAttrs *attrs1) {
+
+  ok = gTrue;
+  num = num1;
+
+  // get attributes
+  attrs = attrs1;
+
+  // 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, int dpi, int rotate) {
+#ifndef PDF_PARSER_ONLY
+  Gfx *gfx;
+  Object obj;
+
+  if (printCommands) {
+    printf("***** MediaBox = ll:%g,%g ur:%g,%g\n",
+	   getX1(), getY1(), getX2(), getY2());
+    if (isCropped()) {
+      printf("***** CropBox = ll:%g,%g ur:%g,%g\n",
+	     getCropX1(), getCropY1(), getCropX2(), getCropY2());
+    }
+    printf("***** Rotate = %d\n", attrs->getRotate());
+  }
+  rotate += getRotate();
+  if (rotate >= 360)
+    rotate -= 360;
+  else if (rotate < 0)
+    rotate += 360;
+  gfx = new Gfx(out, num, attrs->getResourceDict(),
+		dpi, getX1(), getY1(), getX2(), getY2(), isCropped(),
+		getCropX1(), getCropY1(), getCropX2(), getCropY2(), rotate);
+  contents.fetch(&obj);
+  if (!obj.isNull())
+    gfx->display(&obj);
+  obj.free();
+  delete gfx;
+#endif
+}