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QR-Code-generator
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Renamed loop variables in QrCode.{drawFinderPattern(),drawAlignmentPattern()} for clarity, in all languages (but somewhat differently in C).

This commit is contained in:
Project Nayuki 2018-09-17 03:47:58 +00:00
parent 440efef8bf
commit 87868d7920
7 changed files with 55 additions and 55 deletions
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22
c/qrcodegen.c
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@ -359,15 +359,15 @@ static void drawWhiteFunctionModules(uint8_t qrcode[], int version) {
}
// Draw 3 finder patterns (all corners except bottom right; overwrites some timing modules)
for (int i = -4; i <= 4; i++) {
for (int j = -4; j <= 4; j++) {
int dist = abs(i);
if (abs(j) > dist)
dist = abs(j);
for (int dy = -4; dy <= 4; dy++) {
for (int dx = -4; dx <= 4; dx++) {
int dist = abs(dy);
if (abs(dx) > dist)
dist = abs(dx);
if (dist == 2 || dist == 4) {
setModuleBounded(qrcode, 3 + j, 3 + i, false);
setModuleBounded(qrcode, qrsize - 4 + j, 3 + i, false);
setModuleBounded(qrcode, 3 + j, qrsize - 4 + i, false);
setModuleBounded(qrcode, 3 + dx, 3 + dy, false);
setModuleBounded(qrcode, qrsize - 4 + dx, 3 + dy, false);
setModuleBounded(qrcode, 3 + dx, qrsize - 4 + dy, false);
}
}
}
@ -379,9 +379,9 @@ static void drawWhiteFunctionModules(uint8_t qrcode[], int version) {
for (int j = 0; j < numAlign; j++) {
if ((i == 0 && j == 0) || (i == 0 && j == numAlign - 1) || (i == numAlign - 1 && j == 0))
continue; // Don't draw on the three finder corners
for (int k = -1; k <= 1; k++) {
for (int l = -1; l <= 1; l++)
setModule(qrcode, alignPatPos[i] + l, alignPatPos[j] + k, k == 0 && l == 0);
for (int dy = -1; dy <= 1; dy++) {
for (int dx = -1; dx <= 1; dx++)
setModule(qrcode, alignPatPos[i] + dx, alignPatPos[j] + dy, dy == 0 && dx == 0);
}
}
}

14
cpp/QrCode.cpp
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@ -270,10 +270,10 @@ void QrCode::drawVersion() {
void QrCode::drawFinderPattern(int x, int y) {
for (int i = -4; i <= 4; i++) {
for (int j = -4; j <= 4; j++) {
int dist = std::max(std::abs(i), std::abs(j)); // Chebyshev/infinity norm
int xx = x + j, yy = y + i;
for (int dy = -4; dy <= 4; dy++) {
for (int dx = -4; dx <= 4; dx++) {
int dist = std::max(std::abs(dy), std::abs(dx)); // Chebyshev/infinity norm
int xx = x + dx, yy = y + dy;
if (0 <= xx && xx < size && 0 <= yy && yy < size)
setFunctionModule(xx, yy, dist != 2 && dist != 4);
}
@ -282,9 +282,9 @@ void QrCode::drawFinderPattern(int x, int y) {
void QrCode::drawAlignmentPattern(int x, int y) {
for (int i = -2; i <= 2; i++) {
for (int j = -2; j <= 2; j++)
setFunctionModule(x + j, y + i, std::max(std::abs(i), std::abs(j)) != 1);
for (int dy = -2; dy <= 2; dy++) {
for (int dx = -2; dx <= 2; dx++)
setFunctionModule(x + dx, y + dy, std::max(std::abs(dy), std::abs(dx)) != 1);
}
}

14
java/io/nayuki/qrcodegen/QrCode.java
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@ -402,10 +402,10 @@ public final class QrCode {
// Draws a 9*9 finder pattern including the border separator,
// with the center module at (x, y). Modules can be out of bounds.
private void drawFinderPattern(int x, int y) {
for (int i = -4; i <= 4; i++) {
for (int j = -4; j <= 4; j++) {
int dist = Math.max(Math.abs(i), Math.abs(j)); // Chebyshev/infinity norm
int xx = x + j, yy = y + i;
for (int dy = -4; dy <= 4; dy++) {
for (int dx = -4; dx <= 4; dx++) {
int dist = Math.max(Math.abs(dy), Math.abs(dx)); // Chebyshev/infinity norm
int xx = x + dx, yy = y + dy;
if (0 <= xx && xx < size && 0 <= yy && yy < size)
setFunctionModule(xx, yy, dist != 2 && dist != 4);
}
@ -416,9 +416,9 @@ public final class QrCode {
// Draws a 5*5 alignment pattern, with the center module
// at (x, y). All modules must be in bounds.
private void drawAlignmentPattern(int x, int y) {
for (int i = -2; i <= 2; i++) {
for (int j = -2; j <= 2; j++)
setFunctionModule(x + j, y + i, Math.max(Math.abs(i), Math.abs(j)) != 1);
for (int dy = -2; dy <= 2; dy++) {
for (int dx = -2; dx <= 2; dx++)
setFunctionModule(x + dx, y + dy, Math.max(Math.abs(dy), Math.abs(dx)) != 1);
}
}

14
javascript/qrcodegen.js
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@ -276,10 +276,10 @@ var qrcodegen = new function() {
// Draws a 9*9 finder pattern including the border separator,
// with the center module at (x, y). Modules can be out of bounds.
function drawFinderPattern(x, y) {
for (var i = -4; i <= 4; i++) {
for (var j = -4; j <= 4; j++) {
var dist = Math.max(Math.abs(i), Math.abs(j)); // Chebyshev/infinity norm
var xx = x + j, yy = y + i;
for (var dy = -4; dy <= 4; dy++) {
for (var dx = -4; dx <= 4; dx++) {
var dist = Math.max(Math.abs(dy), Math.abs(dx)); // Chebyshev/infinity norm
var xx = x + dx, yy = y + dy;
if (0 <= xx && xx < size && 0 <= yy && yy < size)
setFunctionModule(xx, yy, dist != 2 && dist != 4);
}
@ -290,9 +290,9 @@ var qrcodegen = new function() {
// Draws a 5*5 alignment pattern, with the center module
// at (x, y). All modules must be in bounds.
function drawAlignmentPattern(x, y) {
for (var i = -2; i <= 2; i++) {
for (var j = -2; j <= 2; j++)
setFunctionModule(x + j, y + i, Math.max(Math.abs(i), Math.abs(j)) != 1);
for (var dy = -2; dy <= 2; dy++) {
for (var dx = -2; dx <= 2; dx++)
setFunctionModule(x + dx, y + dy, Math.max(Math.abs(dy), Math.abs(dx)) != 1);
}
}

14
python/qrcodegen.py
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@ -322,20 +322,20 @@ class QrCode(object):
def _draw_finder_pattern(self, x, y):
"""Draws a 9*9 finder pattern including the border separator,
with the center module at (x, y). Modules can be out of bounds."""
for i in range(-4, 5):
for j in range(-4, 5):
xx, yy = x + j, y + i
for dy in range(-4, 5):
for dx in range(-4, 5):
xx, yy = x + dx, y + dy
if (0 <= xx < self._size) and (0 <= yy < self._size):
# Chebyshev/infinity norm
self._set_function_module(xx, yy, max(abs(i), abs(j)) not in (2, 4))
self._set_function_module(xx, yy, max(abs(dy), abs(dx)) not in (2, 4))
def _draw_alignment_pattern(self, x, y):
"""Draws a 5*5 alignment pattern, with the center module
at (x, y). All modules must be in bounds."""
for i in range(-2, 3):
for j in range(-2, 3):
self._set_function_module(x + j, y + i, max(abs(i), abs(j)) != 1)
for dy in range(-2, 3):
for dx in range(-2, 3):
self._set_function_module(x + dx, y + dy, max(abs(dy), abs(dx)) != 1)
def _set_function_module(self, x, y, isblack):

16
rust/src/lib.rs
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@ -367,12 +367,12 @@ impl QrCode {
// Draws a 9*9 finder pattern including the border separator,
// with the center module at (x, y). Modules can be out of bounds.
fn draw_finder_pattern(&mut self, x: i32, y: i32) {
for i in -4 .. 5 {
for j in -4 .. 5 {
let xx: i32 = x + j;
let yy: i32 = y + i;
for dy in -4 .. 5 {
for dx in -4 .. 5 {
let xx: i32 = x + dx;
let yy: i32 = y + dy;
if 0 <= xx && xx < self.size && 0 <= yy && yy < self.size {
let dist: i32 = std::cmp::max(i.abs(), j.abs()); // Chebyshev/infinity norm
let dist: i32 = std::cmp::max(dy.abs(), dx.abs()); // Chebyshev/infinity norm
self.set_function_module(xx, yy, dist != 2 && dist != 4);
}
}
@ -383,9 +383,9 @@ impl QrCode {
// Draws a 5*5 alignment pattern, with the center module
// at (x, y). All modules must be in bounds.
fn draw_alignment_pattern(&mut self, x: i32, y: i32) {
for i in -2 .. 3 {
for j in -2 .. 3 {
self.set_function_module(x + j, y + i, std::cmp::max(i.abs(), j.abs()) != 1);
for dy in -2 .. 3 {
for dx in -2 .. 3 {
self.set_function_module(x + dx, y + dy, std::cmp::max(dy.abs(), dx.abs()) != 1);
}
}
}

16
typescript/qrcodegen.ts
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@ -345,11 +345,11 @@ namespace qrcodegen {
// Draws a 9*9 finder pattern including the border separator,
// with the center module at (x, y). Modules can be out of bounds.
private drawFinderPattern(x: int, y: int): void {
for (let i = -4; i <= 4; i++) {
for (let j = -4; j <= 4; j++) {
let dist: int = Math.max(Math.abs(i), Math.abs(j)); // Chebyshev/infinity norm
let xx: int = x + j;
let yy: int = y + i;
for (let dy = -4; dy <= 4; dy++) {
for (let dx = -4; dx <= 4; dx++) {
let dist: int = Math.max(Math.abs(dy), Math.abs(dx)); // Chebyshev/infinity norm
let xx: int = x + dx;
let yy: int = y + dy;
if (0 <= xx && xx < this.size && 0 <= yy && yy < this.size)
this.setFunctionModule(xx, yy, dist != 2 && dist != 4);
}
@ -360,9 +360,9 @@ namespace qrcodegen {
// Draws a 5*5 alignment pattern, with the center module
// at (x, y). All modules must be in bounds.
private drawAlignmentPattern(x: int, y: int): void {
for (let i = -2; i <= 2; i++) {
for (let j = -2; j <= 2; j++)
this.setFunctionModule(x + j, y + i, Math.max(Math.abs(i), Math.abs(j)) != 1);
for (let dy = -2; dy <= 2; dy++) {
for (let dx = -2; dx <= 2; dx++)
this.setFunctionModule(x + dx, y + dy, Math.max(Math.abs(dy), Math.abs(dx)) != 1);
}
}