57 lines
1.9 KiB
C++
57 lines
1.9 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 Explode(string type, string *outType, char *BufferData,
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size_t BufferLength, ArgumentMap Arguments, size_t *DataSize) {
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bool implode = GetArgumentWithFallback<bool>(Arguments, "implode", false);
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string basePath = GetArgument<string>(Arguments, "basePath");
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VOption *options = VImage::option();
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VImage in =
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VImage::new_from_buffer(
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BufferData, BufferLength, "",
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type == "gif" ? options->set("n", -1)->set("access", "sequential")
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: 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 distortPath = basePath + "assets/images/" +
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(implode ? "linearimplode.png" : "linearexplode.png");
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VImage distort =
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(VImage::new_from_file(distortPath.c_str())
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.resize(width / 500.0, VImage::option()
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->set("vscale", pageHeight / 500.0)
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->set("kernel", VIPS_KERNEL_CUBIC)) /
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65535);
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VImage distortImage = (distort[0] * width).bandjoin(distort[1] * pageHeight);
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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 mapped = img_frame.mapim(distortImage);
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img.push_back(mapped);
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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, pageHeight);
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void *buf;
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final.write_to_buffer(("." + *outType).c_str(), &buf, DataSize);
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ArgumentMap output;
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output["buf"] = (char *)buf;
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output["width"] = width;
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output["height"] = pageHeight;
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return output;
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} |