57 lines
1.6 KiB
C++
57 lines
1.6 KiB
C++
#include "common.h"
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#include <map>
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#include <vips/vips8>
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using namespace std;
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using namespace vips;
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char *Uncaption(string type, char *BufferData, size_t BufferLength,
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ArgumentMap Arguments, size_t *DataSize) {
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float tolerance = GetArgumentWithFallback<float>(Arguments, "tolerance", 0.5);
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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())
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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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VImage first =
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in.crop(0, 0, 3, pageHeight).colourspace(VIPS_INTERPRETATION_B_W) >
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(255 * tolerance);
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int top, captionWidth, captionHeight;
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first.find_trim(&top, &captionWidth, &captionHeight);
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vector<VImage> img;
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int newHeight = pageHeight - top;
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if (top == pageHeight) {
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newHeight = pageHeight;
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top = 0;
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}
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for (int i = 0; i < nPages; i++) {
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VImage img_frame = in.crop(0, (i * pageHeight) + top, width, newHeight);
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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, newHeight);
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void *buf;
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final.write_to_buffer(
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("." + type).c_str(), &buf, DataSize,
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type == "gif" ? VImage::option()->set("dither", 0)->set("reoptimise", 1)
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: 0);
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vips_error_clear();
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vips_thread_shutdown();
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return (char *)buf;
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}
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