78 lines
2.7 KiB
C++
78 lines
2.7 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 Globe(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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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 = type == "gif" ? vips_image_get_n_pages(in.get_image()) : 30;
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double size = min(width, pageHeight);
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string diffPath = basePath + "assets/images/globediffuse.png";
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VImage diffuse = VImage::new_from_file(diffPath.c_str())
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.resize(size / 500.0, VImage::option()->set(
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"kernel", VIPS_KERNEL_CUBIC)) /
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255;
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string specPath = basePath + "assets/images/globespec.png";
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VImage specular = VImage::new_from_file(specPath.c_str())
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.resize(size / 500.0, VImage::option()->set(
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"kernel", VIPS_KERNEL_CUBIC));
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string distortPath = basePath + "assets/images/spheremap.png";
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VImage distort =
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(VImage::new_from_file(distortPath.c_str())
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.resize(size / 500.0,
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VImage::option()->set("kernel", VIPS_KERNEL_CUBIC)) /
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65535) *
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size;
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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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size / (double)width,
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VImage::option()->set("vscale", size / (double)pageHeight));
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VImage rolled = img_frame.wrap(
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VImage::option()->set("x", width * i / nPages)->set("y", 0));
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VImage extracted = rolled.extract_band(0, VImage::option()->set("n", 3));
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VImage mapped = extracted.mapim(distort);
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VImage composited = mapped * diffuse + specular;
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VImage frame = composited.bandjoin(diffuse > 0.0);
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img.push_back(frame);
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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, size);
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if (type != "gif") {
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vector<int> delay(30, 50);
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final.set("delay", delay);
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}
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void *buf;
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final.write_to_buffer(".gif", &buf, DataSize);
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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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} |