diff options
Diffstat (limited to 'examples/pdf-invert-images.cc')
| -rw-r--r-- | examples/pdf-invert-images.cc | 118 |
1 files changed, 59 insertions, 59 deletions
diff --git a/examples/pdf-invert-images.cc b/examples/pdf-invert-images.cc index a61d170f..178cde95 100644 --- a/examples/pdf-invert-images.cc +++ b/examples/pdf-invert-images.cc @@ -14,9 +14,9 @@ static char const* whoami = 0; void usage() { std::cerr << "Usage: " << whoami << " infile.pdf outfile.pdf [in-password]" - << std::endl - << "Invert some images in infile.pdf;" - << " write output to outfile.pdf" << std::endl; + << std::endl + << "Invert some images in infile.pdf;" + << " write output to outfile.pdf" << std::endl; exit(2); } @@ -36,7 +36,7 @@ class ImageInverter: public QPDFObjectHandle::StreamDataProvider { } virtual void provideStreamData(int objid, int generation, - Pipeline* pipeline) override; + Pipeline* pipeline) override; void registerImage( QPDFObjectHandle image, @@ -80,13 +80,13 @@ ImageInverter::registerImage( // with it explicitly here. We could explicitly use /DCTDecode and // write through a DCT filter if we wanted. image.replaceStreamData(self, - QPDFObjectHandle::newNull(), - QPDFObjectHandle::newNull()); + QPDFObjectHandle::newNull(), + QPDFObjectHandle::newNull()); } void ImageInverter::provideStreamData(int objid, int generation, - Pipeline* pipeline) + Pipeline* pipeline) { // Use the object and generation number supplied to look up the // image data. Then invert the image data and write the inverted @@ -99,8 +99,8 @@ ImageInverter::provideStreamData(int objid, int generation, unsigned char ch; for (size_t i = 0; i < size; ++i) { - ch = QIntC::to_uchar(0xff - buf[i]); - pipeline->write(&ch, 1); + ch = QIntC::to_uchar(0xff - buf[i]); + pipeline->write(&ch, 1); } pipeline->finish(); } @@ -112,7 +112,7 @@ int main(int argc, char* argv[]) // For libtool's sake.... if (strncmp(whoami, "lt-", 3) == 0) { - whoami += 3; + whoami += 3; } // For test suite @@ -126,7 +126,7 @@ int main(int argc, char* argv[]) if (! ((argc == 3) || (argc == 4))) { - usage(); + usage(); } char const* infilename = argv[1]; @@ -135,64 +135,64 @@ int main(int argc, char* argv[]) try { - QPDF qpdf; - qpdf.processFile(infilename, password); + QPDF qpdf; + qpdf.processFile(infilename, password); - ImageInverter* inv = new ImageInverter; - auto p = PointerHolder<QPDFObjectHandle::StreamDataProvider>(inv); + ImageInverter* inv = new ImageInverter; + auto p = PointerHolder<QPDFObjectHandle::StreamDataProvider>(inv); - // For each page... - std::vector<QPDFPageObjectHelper> pages = + // For each page... + std::vector<QPDFPageObjectHelper> pages = QPDFPageDocumentHelper(qpdf).getAllPages(); - for (std::vector<QPDFPageObjectHelper>::iterator iter = pages.begin(); - iter != pages.end(); ++iter) - { - QPDFPageObjectHelper& page(*iter); - // Get all images on the page. - std::map<std::string, QPDFObjectHandle> images = - page.getImages(); - for (auto& iter2: images) - { - QPDFObjectHandle& image = iter2.second; - QPDFObjectHandle image_dict = image.getDict(); - QPDFObjectHandle color_space = - image_dict.getKey("/ColorSpace"); - QPDFObjectHandle bits_per_component = - image_dict.getKey("/BitsPerComponent"); - - // For our example, we can only work with images 8-bit - // grayscale images that we can fully decode. Use - // pipeStreamData with a null pipeline to determine - // whether the image is filterable. Directly inspect - // keys to determine the image type. - if (image.pipeStreamData(0, qpdf_ef_compress, + for (std::vector<QPDFPageObjectHelper>::iterator iter = pages.begin(); + iter != pages.end(); ++iter) + { + QPDFPageObjectHelper& page(*iter); + // Get all images on the page. + std::map<std::string, QPDFObjectHandle> images = + page.getImages(); + for (auto& iter2: images) + { + QPDFObjectHandle& image = iter2.second; + QPDFObjectHandle image_dict = image.getDict(); + QPDFObjectHandle color_space = + image_dict.getKey("/ColorSpace"); + QPDFObjectHandle bits_per_component = + image_dict.getKey("/BitsPerComponent"); + + // For our example, we can only work with images 8-bit + // grayscale images that we can fully decode. Use + // pipeStreamData with a null pipeline to determine + // whether the image is filterable. Directly inspect + // keys to determine the image type. + if (image.pipeStreamData(0, qpdf_ef_compress, qpdf_dl_all) && color_space.isNameAndEquals("/DeviceGray") && - bits_per_component.isInteger() && - (bits_per_component.getIntValue() == 8)) - { + bits_per_component.isInteger() && + (bits_per_component.getIntValue() == 8)) + { inv->registerImage(image, p); } - } - } - - // Write out a new file - QPDFWriter w(qpdf, outfilename); - if (static_id) - { - // For the test suite, uncompress streams and use static - // IDs. - w.setStaticID(true); // for testing only - } - w.write(); - std::cout << whoami << ": new file written to " << outfilename - << std::endl; + } + } + + // Write out a new file + QPDFWriter w(qpdf, outfilename); + if (static_id) + { + // For the test suite, uncompress streams and use static + // IDs. + w.setStaticID(true); // for testing only + } + w.write(); + std::cout << whoami << ": new file written to " << outfilename + << std::endl; } catch (std::exception &e) { - std::cerr << whoami << " processing file " << infilename << ": " - << e.what() << std::endl; - exit(2); + std::cerr << whoami << " processing file " << infilename << ": " + << e.what() << std::endl; + exit(2); } return 0; |