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Cleanup format string placement code

This commit is contained in:
Oskari Alaranta 2025-10-20 22:21:28 +03:00
parent 61773ea3d9
commit 67516a9084
1 changed files with 29 additions and 30 deletions
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59
main.cpp
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@ -773,37 +773,36 @@ QRCode generate_qr_code(std::string_view data, ErrorCorrection ec)
const uint16_t format_data = (ec_to_val[static_cast<size_t>(qr_info.error_correction)] << 13) | (pattern << 10);
const uint16_t format_string = (format_data | mod2_remainder(format_data, 0b10100110111, 10)) ^ 0b101010000010010;
qr_code.set(0, 8, (format_string >> 14) & 1);
qr_code.set(1, 8, (format_string >> 13) & 1);
qr_code.set(2, 8, (format_string >> 12) & 1);
qr_code.set(3, 8, (format_string >> 11) & 1);
qr_code.set(4, 8, (format_string >> 10) & 1);
qr_code.set(5, 8, (format_string >> 9) & 1);
qr_code.set(7, 8, (format_string >> 8) & 1);
qr_code.set(8, 8, (format_string >> 7) & 1);
qr_code.set(8, 7, (format_string >> 6) & 1);
qr_code.set(8, 5, (format_string >> 5) & 1);
qr_code.set(8, 4, (format_string >> 4) & 1);
qr_code.set(8, 3, (format_string >> 3) & 1);
qr_code.set(8, 2, (format_string >> 2) & 1);
qr_code.set(8, 1, (format_string >> 1) & 1);
qr_code.set(8, 0, (format_string >> 0) & 1);
constexpr int8_t format_location[][2][2] {
{ { 8, 0 }, { -1, 8 } },
{ { 8, 1 }, { -2, 8 } },
{ { 8, 2 }, { -3, 8 } },
{ { 8, 3 }, { -4, 8 } },
{ { 8, 4 }, { -5, 8 } },
{ { 8, 5 }, { -6, 8 } },
{ { 8, 7 }, { -7, 8 } },
{ { 8, 8 }, { -8, 8 } },
{ { 7, 8 }, { 8, -7 } },
{ { 5, 8 }, { 8, -6 } },
{ { 4, 8 }, { 8, -5 } },
{ { 3, 8 }, { 8, -4 } },
{ { 2, 8 }, { 8, -3 } },
{ { 1, 8 }, { 8, -2 } },
{ { 0, 8 }, { 8, -1 } },
};
qr_code.set(8, size - 1, (format_string >> 14) & 1);
qr_code.set(8, size - 2, (format_string >> 13) & 1);
qr_code.set(8, size - 3, (format_string >> 12) & 1);
qr_code.set(8, size - 4, (format_string >> 11) & 1);
qr_code.set(8, size - 5, (format_string >> 10) & 1);
qr_code.set(8, size - 6, (format_string >> 9) & 1);
qr_code.set(8, size - 7, (format_string >> 8) & 1);
qr_code.set(size - 8, 8, (format_string >> 7) & 1);
qr_code.set(size - 7, 8, (format_string >> 6) & 1);
qr_code.set(size - 6, 8, (format_string >> 5) & 1);
qr_code.set(size - 5, 8, (format_string >> 4) & 1);
qr_code.set(size - 4, 8, (format_string >> 3) & 1);
qr_code.set(size - 3, 8, (format_string >> 2) & 1);
qr_code.set(size - 2, 8, (format_string >> 1) & 1);
qr_code.set(size - 1, 8, (format_string >> 0) & 1);
for (size_t bit = 0; bit < 15; bit++)
{
for (size_t i = 0; i < 2; i++)
{
const auto [x, y] = format_location[bit][i];
qr_code.set(
x < 0 ? size + x : x,
y < 0 ? size + y : y,
(format_string >> bit) & 1
);
}
}
}
// version string