Document:

Warning before running out of memory and stop pixmap request.
  CCMAIL: 103435@bugs.kde.org
PagePainter:
  Not related to the bug: avoid scaling up slow pixmaps.

svn path=/branches/kpdf_annotations/kdegraphics/kpdf/; revision=403884

core/document.cpp

@@ -61,6 +61,7 @@ class KPDFDocumentPrivate
         QValueList< PixmapRequest * > pixmapRequestsStack;
         QValueList< AllocatedPixmap * > allocatedPixmapsFifo;
         int allocatedPixmapsTotalMemory;
+        bool warnedOutOfMemory;
 
         // timers (memory checking / info saver)
         QTimer * memCheckTimer;
@@ -106,6 +107,7 @@ KPDFDocument::KPDFDocument()
     d->allocatedPixmapsTotalMemory = 0;
     d->memCheckTimer = 0;
     d->saveBookmarksTimer = 0;
+    d->warnedOutOfMemory = false;
 }
 
 KPDFDocument::~KPDFDocument()
@@ -1090,10 +1092,21 @@ void KPDFDocument::sendGeneratorRequest()
         PixmapRequest * r = d->pixmapRequestsStack.last();
         d->pixmapRequestsStack.pop_back();
         // request only if page isn't already present
-        if ( !r->page->hasPixmap( r->id, r->width, r->height ) )
-            request = r;
-        else
+        if ( r->page->hasPixmap( r->id, r->width, r->height ) )
             delete r;
+        else if ( (long)r->width * (long)r->height > 20000000L )
+        {
+            delete r;
+            if ( !d->warnedOutOfMemory )
+            {
+                kdWarning() << "Running out of memory on page " << r->pageNumber
+                    << " (" << r->width << "x" << r->height << " px);" << endl;
+                kdWarning() << "this message will be reported only once." << endl;
+                d->warnedOutOfMemory = true;
+            }
+        }
+        else
+            request = r;
     }
 
     // if no request found (or already generated), return

ui/pagepainter.cpp

@@ -51,7 +51,9 @@ void PagePainter::paintPageOnPainter( QPainter * destPainter, const KPDFPage * p
 
     /** 1B - IF NO PIXMAP, DRAW EMPTY PAGE **/
     double pixmapRescaleRatio = pixmap ? scaledWidth / (double)pixmap->width() : -1;
-    if ( !pixmap || pixmapRescaleRatio > 20.0 || pixmapRescaleRatio < 0.25 )
+    long pixmapPixels = pixmap ? (long)pixmap->width() * (long)pixmap->height() : 0;
+    if ( !pixmap || pixmapRescaleRatio > 20.0 || pixmapRescaleRatio < 0.25 ||
+         (scaledWidth != pixmap->width() && pixmapPixels > 6000000L) )
     {
         if ( Settings::changeColors() &&
              Settings::renderMode() == Settings::EnumRenderMode::Paper )