#include #include "common.h" using namespace std; using namespace vips; char *Mirror(string *type, char *BufferData, size_t BufferLength, ArgumentMap Arguments, size_t *DataSize) { bool vertical = GetArgumentWithFallback(Arguments, "vertical", false); bool first = GetArgumentWithFallback(Arguments, "first", false); VOption *options = VImage::option()->set("access", "sequential"); VImage in = VImage::new_from_buffer(BufferData, BufferLength, "", *type == "gif" ? options->set("n", -1) : options) .colourspace(VIPS_INTERPRETATION_sRGB); if (!in.has_alpha()) in = in.bandjoin(255); VImage out; if (vertical) { if (*type == "gif") { // once again, libvips gif handling is both a blessing and a curse vector img; int pageHeight = vips_image_get_page_height(in.get_image()); int nPages = vips_image_get_n_pages(in.get_image()); bool isOdd = pageHeight % 2; for (int i = 0; i < nPages; i++) { int x = (i * pageHeight) + (first ? 0 : (pageHeight / 2)); VImage cropped = in.crop(0, x, in.width(), pageHeight / 2); VImage flipped = cropped.flip(VIPS_DIRECTION_VERTICAL); VImage final = VImage::arrayjoin( {first ? cropped : flipped, first ? flipped : cropped}, VImage::option()->set("across", 1)); img.push_back(final); } out = VImage::arrayjoin(img, VImage::option()->set("across", 1)); out.set(VIPS_META_PAGE_HEIGHT, pageHeight - (isOdd ? 1 : 0)); } else { VImage cropped = in.extract_area(0, 0, in.width(), in.height() / 2); VImage flipped = cropped.flip(VIPS_DIRECTION_VERTICAL); out = VImage::arrayjoin({cropped, flipped}, VImage::option()->set("across", 1)); } } else { if (first) { VImage cropped = in.extract_area(0, 0, in.width() / 2, in.height()); VImage flipped = cropped.flip(VIPS_DIRECTION_HORIZONTAL); out = VImage::arrayjoin({cropped, flipped}); } else { int size = in.width() / 2; VImage cropped = in.extract_area(size, 0, size, in.height()); VImage flipped = cropped.flip(VIPS_DIRECTION_HORIZONTAL); out = VImage::arrayjoin({flipped, cropped}); } } void *buf; out.write_to_buffer(("." + *type).c_str(), &buf, DataSize); return (char *)buf; }