69 lines
2.5 KiB
C++
69 lines
2.5 KiB
C++
#include <vips/vips8>
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#include "common.h"
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using namespace std;
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using namespace vips;
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ArgumentMap Scott(string type, string *outType, char *BufferData, size_t BufferLength,
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ArgumentMap Arguments, size_t *DataSize) {
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string basePath = GetArgument<string>(Arguments, "basePath");
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string assetPathIn = GetArgumentWithFallback<string>(Arguments, "assetPath", "assets/images/scott.png");
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string distortPathIn = GetArgumentWithFallback<string>(Arguments, "distortPath", "assets/images/scottmap.png");
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int compx = GetArgumentWithFallback<int>(Arguments, "compx", 127);
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int compy = GetArgumentWithFallback<int>(Arguments, "compy", 181);
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VOption *options = VImage::option()->set("access", "sequential");
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VImage in =
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VImage::new_from_buffer(BufferData, BufferLength, "",
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type == "gif" ? options->set("n", -1) : options)
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.colourspace(VIPS_INTERPRETATION_sRGB);
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if (!in.has_alpha()) in = in.bandjoin(255);
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int width = in.width();
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int pageHeight = vips_image_get_page_height(in.get_image());
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int nPages = vips_image_get_n_pages(in.get_image());
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string assetPath = basePath + assetPathIn;
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VImage bg = VImage::new_from_file(assetPath.c_str());
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int bgwidth = bg.width();
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int bgpageHeight = vips_image_get_page_height(bg.get_image());
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string distortPath = basePath + distortPathIn;
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VImage distort = VImage::new_from_file(distortPath.c_str());
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VImage distortImage =
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((distort[1] / 255) * 414).bandjoin((distort[0] / 255) * 233);
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vector<VImage> img;
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for (int i = 0; i < nPages; i++) {
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VImage img_frame =
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type == "gif" ? in.crop(0, i * pageHeight, width, pageHeight) : in;
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VImage resized = img_frame.resize(
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415 / (double)width,
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VImage::option()->set("vscale", 234 / (double)pageHeight));
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VImage mapped = resized.mapim(distortImage)
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.extract_band(0, VImage::option()->set("n", 3))
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.bandjoin(distort[2]);
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VImage offset = mapped.embed(compx, compy, bgwidth, bgpageHeight);
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VImage composited = bg.composite2(offset, VIPS_BLEND_MODE_OVER);
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img.push_back(composited);
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}
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VImage final = VImage::arrayjoin(img, VImage::option()->set("across", 1));
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final.set(VIPS_META_PAGE_HEIGHT, 481);
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void *buf;
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final.write_to_buffer(
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("." + *outType).c_str(), &buf, DataSize,
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*outType == "gif" ? VImage::option()->set("dither", 1) : 0);
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ArgumentMap output;
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output["buf"] = (char *)buf;
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output["width"] = final.width();
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output["height"] = vips_image_get_page_height(final.get_image());
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return output;
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} |