diff options
Diffstat (limited to 'examples/pdf-invert-images.cc')
| -rw-r--r-- | examples/pdf-invert-images.cc | 19 |
1 files changed, 5 insertions, 14 deletions
diff --git a/examples/pdf-invert-images.cc b/examples/pdf-invert-images.cc index 72a15f2c..bb8541e3 100644 --- a/examples/pdf-invert-images.cc +++ b/examples/pdf-invert-images.cc @@ -25,15 +25,13 @@ void usage() // allocate memory up front for the objects. We want to replace the // stream data with a function of the original stream data. In order // to do this without actually holding all the images in memory, we -// create another QPDF object and copy the streams. Copying the -// streams doesn't actually copy the data. Internally, the qpdf -// library is holding onto the location of the stream data in the -// original file, which makes it possible for the StreamDataProvider -// to access it when it needs it. +// create copies of the streams. Copying the streams doesn't actually +// copy the data. Internally, the qpdf library is holding onto the +// location of the original stream data, which makes it possible for +// the StreamDataProvider to access it when it needs it. class ImageInverter: public QPDFObjectHandle::StreamDataProvider { public: - ImageInverter(); virtual ~ImageInverter() { } @@ -45,16 +43,9 @@ class ImageInverter: public QPDFObjectHandle::StreamDataProvider PointerHolder<QPDFObjectHandle::StreamDataProvider> self); private: - QPDF other; - // Map og in original to copied image std::map<QPDFObjGen, QPDFObjectHandle> copied_images; }; -ImageInverter::ImageInverter() -{ - this->other.emptyPDF(); -} - void ImageInverter::registerImage( QPDFObjectHandle image, @@ -77,7 +68,7 @@ ImageInverter::registerImage( { return; } - this->copied_images[og] = this->other.copyForeignObject(image); + this->copied_images[og] = image.copyStream(); // Register our stream data provider for this stream. Future calls // to getStreamData or pipeStreamData will use the new |