91 lines
3.3 KiB
C++
91 lines
3.3 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 Whisper(string type, string *outType, char *BufferData,
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size_t BufferLength, ArgumentMap Arguments, size_t *DataSize) {
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string caption = GetArgument<string>(Arguments, "caption");
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string basePath = GetArgument<string>(Arguments, "basePath");
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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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int size = width / 6;
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int dividedWidth = width / 175;
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int rad = 1;
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string font_string = "Upright, Twemoji Color Font " + to_string(size);
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VImage mask;
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if (dividedWidth >= 1) {
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mask = VImage::black(dividedWidth * 2 + 1, dividedWidth * 2 + 1) + 128;
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mask.draw_circle({255}, dividedWidth, dividedWidth, dividedWidth,
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VImage::option()->set("fill", true));
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} else {
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mask = VImage::black(rad * 2 + 1, rad * 2 + 1) + 128;
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mask.draw_circle({255}, rad, rad, rad, VImage::option()->set("fill", true));
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}
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VImage textIn = VImage::text(
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".", VImage::option()->set(
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"fontfile", (basePath + "assets/fonts/whisper.otf").c_str()));
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textIn = VImage::text(
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("<span foreground=\"white\">" + caption + "</span>").c_str(),
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VImage::option()
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->set("rgba", true)
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->set("align", VIPS_ALIGN_CENTRE)
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->set("font", font_string.c_str())
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->set("fontfile", (basePath + "assets/fonts/twemoji.otf").c_str())
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->set("width", width));
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textIn = textIn.embed(rad + 10, rad + 10, (textIn.width() + 2 * rad) + 20,
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(textIn.height() + 2 * rad) + 20);
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VImage outline = textIn.morph(mask, VIPS_OPERATION_MORPHOLOGY_DILATE)
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.gaussblur(0.5, VImage::option()->set("min_ampl", 0.1));
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outline = (outline == (vector<double>){0, 0, 0, 0});
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VImage invert = outline.extract_band(3).invert();
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outline =
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outline.extract_band(0, VImage::option()->set("n", outline.bands() - 1))
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.bandjoin(invert);
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VImage textImg = outline.composite2(textIn, VIPS_BLEND_MODE_OVER);
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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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img_frame = img_frame.composite2(
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textImg, VIPS_BLEND_MODE_OVER,
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VImage::option()
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->set("x", (width / 2) - (textImg.width() / 2))
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->set("y", (pageHeight / 2) - (textImg.height() / 2)));
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img.push_back(img_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, pageHeight);
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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"
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? VImage::option()->set("dither", 0)->set("reoptimise", 1)
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: 0);
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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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} |