Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/zxing-cpp/core/src/GridSampler.h @ 21:2f43e400f144

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Provide an "all" target to build both the sdist and the wheel
author Franz Glasner <fzglas.hg@dom66.de>
date Fri, 19 Sep 2025 10:28:53 +0200
parents b50eed0cc0ef
children
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1 /*
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2 * Copyright 2016 Nu-book Inc.
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3 * Copyright 2016 ZXing authors
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4 */
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5 // SPDX-License-Identifier: Apache-2.0
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7 #pragma once
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9 #include "DetectorResult.h"
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10 #include "PerspectiveTransform.h"
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12 namespace ZXing {
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14 /**
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15 * Samples an image for a rectangular matrix of bits of the given dimension. The sampling
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16 * transformation is determined by the coordinates of 4 points, in the original and transformed
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17 * image space.
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18 *
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19 * The following figure is showing the layout a 'pixel'. The point (0,0) is the upper left corner
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20 * of the first pixel. (1,1) is its lower right corner.
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21 *
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22 * 0 1 ... w
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23 * 0 #----#-- ... --#
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24 * | | ... |
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25 * | | ... |
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26 * 1 #----# ... --#
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27 * | | ... |
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28 *
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29 * | | ... |
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30 * h #----#-- ... --#
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31 *
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32 * @param image image to sample
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33 * @param width width of {@link BitMatrix} to sample from image
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34 * @param height height of {@link BitMatrix} to sample from image
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35 * @param mod2Pix transforming a module (grid) coordinate into an image (pixel) coordinate
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36 * @return {@link DetectorResult} representing a grid of points sampled from the image within a region
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37 * defined by the "src" parameters. Result is empty if transformation is invalid (out of bound access).
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38 */
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39 DetectorResult SampleGrid(const BitMatrix& image, int width, int height, const PerspectiveTransform& mod2Pix);
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41 template <typename PointT = PointF>
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42 Quadrilateral<PointT> Rectangle(int x0, int x1, int y0, int y1, typename PointT::value_t o = 0.5)
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43 {
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44 return {PointT{x0 + o, y0 + o}, {x1 + o, y0 + o}, {x1 + o, y1 + o}, {x0 + o, y1 + o}};
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45 }
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47 class ROI
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48 {
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49 public:
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50 int x0, x1, y0, y1;
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51 PerspectiveTransform mod2Pix;
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52 };
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54 using ROIs = std::vector<ROI>;
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56 DetectorResult SampleGrid(const BitMatrix& image, int width, int height, const ROIs& rois);
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58 } // ZXing