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64aa8e654c
slight performance gain (2-3%), see https://sourceforge.net/p/zint/mailman/message/59278637/ - generated by "backend/tools/gen_qr_masks.php" test suite: update BWIPP to latest
81 lines
2.4 KiB
PHP
81 lines
2.4 KiB
PHP
<?php
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/* Generate pre-calculated `qr_masks[]` for "qr.h" */
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/*
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libzint - the open source barcode library
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Copyright (C) 2026 Robin Stuart <rstuart114@gmail.com>
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*/
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/* SPDX-License-Identifier: BSD-3-Clause */
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/* Taken from Barcode Writer in Pure PostScript (BWIPP)
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Copyright (c) 2004-2026 Terry Burton */
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/* SPDX-License-Identifier: MIT */
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/* See https://sourceforge.net/p/zint/mailman/message/59278637/
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and https://github.com/bwipp/postscriptbarcode/commit/763fb4ffbfad7b379723dd3570183c769b28c786
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and "Pre-calculated QR and MicroQR tables" comment in "qr.h"
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Paste output after comment
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*/
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$qr_masks = array();
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$mqr_masks = array();
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for ($y = 0; $y < 12; $y++) {
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for ($x = 0; $x < 6; $x++) {
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$bits = 0;
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$mbits = 0;
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if (($y + $x) % 2 === 0) { /* QR 000, period 2x2 */
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$bits |= 0x01;
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}
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if ($y % 2 === 0) { /* QR 001, MicroQR 00, period 1x2 */
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$bits |= 0x02;
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$mbits |= 0x01;
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}
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if ($x % 3 === 0) { /* QR 010, period 3x1 */
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$bits |= 0x04;
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}
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if (($y + $x) % 3 === 0) { /* QR 011, period 3x3 */
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$bits |= 0x08;
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}
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if (((int)($y / 2) + (int)($x / 3)) % 2 === 0) { /* QR 100, MicroQR 01, period 6x4 */
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$bits |= 0x10;
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$mbits |= 0x02;
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}
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if ((($y * $x) % 2 + ($y * $x) % 3) === 0) { /* QR 101, period 6x6 */
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$bits |= 0x20;
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}
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if ((($y * $x) % 2 + ($y * $x) % 3) % 2 === 0) { /* QR 110, MicroQR 10, period 6x6 */
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$bits |= 0x40;
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$mbits |= 0x04;
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}
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if ((($y + $x) % 2 + ($y * $x) % 3) % 2 === 0) { /* QR 111, MicroQR 11, period 6x6 */
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$bits |= 0x80;
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$mbits |= 0x08;
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}
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$qr_masks[$y][$x] = $bits;
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$mqr_masks[$y][$x] = $mbits;
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}
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}
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printf("static const unsigned char qr_masks[12][6] = {\n");
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for ($y = 0; $y < 12; $y++) {
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printf(" { ");
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for ($x = 0; $x < 6; $x++) {
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printf("0x%02X%s", $qr_masks[$y][$x], $x == 5 ? " " : ", ");
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}
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printf("}%s\n", $y == 11 ? "" : ",");
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}
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printf("};\n");
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printf("\nstatic const unsigned char microqr_masks[12][6] = {\n");
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for ($y = 0; $y < 12; $y++) {
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printf(" { ");
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for ($x = 0; $x < 6; $x++) {
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printf("0x%02X%s", $mqr_masks[$y][$x], $x == 5 ? " " : ", ");
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}
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printf("}%s\n", $y == 11 ? "" : ",");
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}
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printf("};\n");
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/* vim: set ts=4 sw=4 et : */
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