drop Qt4 support, move Source files and few other changes
This commit is contained in:
Syping
parent
d7b28c2468
commit
e463d2d22c
165 changed files with 114 additions and 6133 deletions
862
src/anpro/QrCode.cpp
Normal file
862
src/anpro/QrCode.cpp
Normal file
|
|
@ -0,0 +1,862 @@
|
|||
/*
|
||||
* QR Code generator library (C++)
|
||||
*
|
||||
* Copyright (c) Project Nayuki. (MIT License)
|
||||
* https://www.nayuki.io/page/qr-code-generator-library
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy of
|
||||
* this software and associated documentation files (the "Software"), to deal in
|
||||
* the Software without restriction, including without limitation the rights to
|
||||
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
|
||||
* the Software, and to permit persons to whom the Software is furnished to do so,
|
||||
* subject to the following conditions:
|
||||
* - The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
* - The Software is provided "as is", without warranty of any kind, express or
|
||||
* implied, including but not limited to the warranties of merchantability,
|
||||
* fitness for a particular purpose and noninfringement. In no event shall the
|
||||
* authors or copyright holders be liable for any claim, damages or other
|
||||
* liability, whether in an action of contract, tort or otherwise, arising from,
|
||||
* out of or in connection with the Software or the use or other dealings in the
|
||||
* Software.
|
||||
*/
|
||||
|
||||
#include <algorithm>
|
||||
#include <climits>
|
||||
#include <cstddef>
|
||||
#include <cstdlib>
|
||||
#include <cstring>
|
||||
#include <sstream>
|
||||
#include <stdexcept>
|
||||
#include <utility>
|
||||
#include "QrCode.h"
|
||||
|
||||
using std::int8_t;
|
||||
using std::uint8_t;
|
||||
using std::size_t;
|
||||
using std::vector;
|
||||
|
||||
|
||||
namespace qrcodegen {
|
||||
|
||||
QrSegment::Mode::Mode(int mode, int cc0, int cc1, int cc2) :
|
||||
modeBits(mode) {
|
||||
numBitsCharCount[0] = cc0;
|
||||
numBitsCharCount[1] = cc1;
|
||||
numBitsCharCount[2] = cc2;
|
||||
}
|
||||
|
||||
|
||||
int QrSegment::Mode::getModeBits() const {
|
||||
return modeBits;
|
||||
}
|
||||
|
||||
|
||||
int QrSegment::Mode::numCharCountBits(int ver) const {
|
||||
return numBitsCharCount[(ver + 7) / 17];
|
||||
}
|
||||
|
||||
|
||||
const QrSegment::Mode QrSegment::Mode::NUMERIC (0x1, 10, 12, 14);
|
||||
const QrSegment::Mode QrSegment::Mode::ALPHANUMERIC(0x2, 9, 11, 13);
|
||||
const QrSegment::Mode QrSegment::Mode::BYTE (0x4, 8, 16, 16);
|
||||
const QrSegment::Mode QrSegment::Mode::KANJI (0x8, 8, 10, 12);
|
||||
const QrSegment::Mode QrSegment::Mode::ECI (0x7, 0, 0, 0);
|
||||
|
||||
|
||||
QrSegment QrSegment::makeBytes(const vector<uint8_t> &data) {
|
||||
if (data.size() > static_cast<unsigned int>(INT_MAX))
|
||||
throw std::length_error("Data too long");
|
||||
BitBuffer bb;
|
||||
for (uint8_t b : data)
|
||||
bb.appendBits(b, 8);
|
||||
return QrSegment(Mode::BYTE, static_cast<int>(data.size()), std::move(bb));
|
||||
}
|
||||
|
||||
|
||||
QrSegment QrSegment::makeNumeric(const char *digits) {
|
||||
BitBuffer bb;
|
||||
int accumData = 0;
|
||||
int accumCount = 0;
|
||||
int charCount = 0;
|
||||
for (; *digits != '\0'; digits++, charCount++) {
|
||||
char c = *digits;
|
||||
if (c < '0' || c > '9')
|
||||
throw std::domain_error("String contains non-numeric characters");
|
||||
accumData = accumData * 10 + (c - '0');
|
||||
accumCount++;
|
||||
if (accumCount == 3) {
|
||||
bb.appendBits(static_cast<uint32_t>(accumData), 10);
|
||||
accumData = 0;
|
||||
accumCount = 0;
|
||||
}
|
||||
}
|
||||
if (accumCount > 0) // 1 or 2 digits remaining
|
||||
bb.appendBits(static_cast<uint32_t>(accumData), accumCount * 3 + 1);
|
||||
return QrSegment(Mode::NUMERIC, charCount, std::move(bb));
|
||||
}
|
||||
|
||||
|
||||
QrSegment QrSegment::makeAlphanumeric(const char *text) {
|
||||
BitBuffer bb;
|
||||
int accumData = 0;
|
||||
int accumCount = 0;
|
||||
int charCount = 0;
|
||||
for (; *text != '\0'; text++, charCount++) {
|
||||
const char *temp = std::strchr(ALPHANUMERIC_CHARSET, *text);
|
||||
if (temp == nullptr)
|
||||
throw std::domain_error("String contains unencodable characters in alphanumeric mode");
|
||||
accumData = accumData * 45 + static_cast<int>(temp - ALPHANUMERIC_CHARSET);
|
||||
accumCount++;
|
||||
if (accumCount == 2) {
|
||||
bb.appendBits(static_cast<uint32_t>(accumData), 11);
|
||||
accumData = 0;
|
||||
accumCount = 0;
|
||||
}
|
||||
}
|
||||
if (accumCount > 0) // 1 character remaining
|
||||
bb.appendBits(static_cast<uint32_t>(accumData), 6);
|
||||
return QrSegment(Mode::ALPHANUMERIC, charCount, std::move(bb));
|
||||
}
|
||||
|
||||
|
||||
vector<QrSegment> QrSegment::makeSegments(const char *text) {
|
||||
// Select the most efficient segment encoding automatically
|
||||
vector<QrSegment> result;
|
||||
if (*text == '\0'); // Leave result empty
|
||||
else if (isNumeric(text))
|
||||
result.push_back(makeNumeric(text));
|
||||
else if (isAlphanumeric(text))
|
||||
result.push_back(makeAlphanumeric(text));
|
||||
else {
|
||||
vector<uint8_t> bytes;
|
||||
for (; *text != '\0'; text++)
|
||||
bytes.push_back(static_cast<uint8_t>(*text));
|
||||
result.push_back(makeBytes(bytes));
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
|
||||
QrSegment QrSegment::makeEci(long assignVal) {
|
||||
BitBuffer bb;
|
||||
if (assignVal < 0)
|
||||
throw std::domain_error("ECI assignment value out of range");
|
||||
else if (assignVal < (1 << 7))
|
||||
bb.appendBits(static_cast<uint32_t>(assignVal), 8);
|
||||
else if (assignVal < (1 << 14)) {
|
||||
bb.appendBits(2, 2);
|
||||
bb.appendBits(static_cast<uint32_t>(assignVal), 14);
|
||||
} else if (assignVal < 1000000L) {
|
||||
bb.appendBits(6, 3);
|
||||
bb.appendBits(static_cast<uint32_t>(assignVal), 21);
|
||||
} else
|
||||
throw std::domain_error("ECI assignment value out of range");
|
||||
return QrSegment(Mode::ECI, 0, std::move(bb));
|
||||
}
|
||||
|
||||
|
||||
QrSegment::QrSegment(Mode md, int numCh, const std::vector<bool> &dt) :
|
||||
mode(md),
|
||||
numChars(numCh),
|
||||
data(dt) {
|
||||
if (numCh < 0)
|
||||
throw std::domain_error("Invalid value");
|
||||
}
|
||||
|
||||
|
||||
QrSegment::QrSegment(Mode md, int numCh, std::vector<bool> &&dt) :
|
||||
mode(md),
|
||||
numChars(numCh),
|
||||
data(std::move(dt)) {
|
||||
if (numCh < 0)
|
||||
throw std::domain_error("Invalid value");
|
||||
}
|
||||
|
||||
|
||||
int QrSegment::getTotalBits(const vector<QrSegment> &segs, int version) {
|
||||
int result = 0;
|
||||
for (const QrSegment &seg : segs) {
|
||||
int ccbits = seg.mode.numCharCountBits(version);
|
||||
if (seg.numChars >= (1L << ccbits))
|
||||
return -1; // The segment's length doesn't fit the field's bit width
|
||||
if (4 + ccbits > INT_MAX - result)
|
||||
return -1; // The sum will overflow an int type
|
||||
result += 4 + ccbits;
|
||||
if (seg.data.size() > static_cast<unsigned int>(INT_MAX - result))
|
||||
return -1; // The sum will overflow an int type
|
||||
result += static_cast<int>(seg.data.size());
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
|
||||
bool QrSegment::isAlphanumeric(const char *text) {
|
||||
for (; *text != '\0'; text++) {
|
||||
if (std::strchr(ALPHANUMERIC_CHARSET, *text) == nullptr)
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
bool QrSegment::isNumeric(const char *text) {
|
||||
for (; *text != '\0'; text++) {
|
||||
char c = *text;
|
||||
if (c < '0' || c > '9')
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
QrSegment::Mode QrSegment::getMode() const {
|
||||
return mode;
|
||||
}
|
||||
|
||||
|
||||
int QrSegment::getNumChars() const {
|
||||
return numChars;
|
||||
}
|
||||
|
||||
|
||||
const std::vector<bool> &QrSegment::getData() const {
|
||||
return data;
|
||||
}
|
||||
|
||||
|
||||
const char *QrSegment::ALPHANUMERIC_CHARSET = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ $%*+-./:";
|
||||
|
||||
|
||||
|
||||
int QrCode::getFormatBits(Ecc ecl) {
|
||||
switch (ecl) {
|
||||
case Ecc::LOW : return 1;
|
||||
case Ecc::MEDIUM : return 0;
|
||||
case Ecc::QUARTILE: return 3;
|
||||
case Ecc::HIGH : return 2;
|
||||
default: throw std::logic_error("Assertion error");
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
QrCode QrCode::encodeText(const char *text, Ecc ecl) {
|
||||
vector<QrSegment> segs = QrSegment::makeSegments(text);
|
||||
return encodeSegments(segs, ecl);
|
||||
}
|
||||
|
||||
|
||||
QrCode QrCode::encodeBinary(const vector<uint8_t> &data, Ecc ecl) {
|
||||
vector<QrSegment> segs{QrSegment::makeBytes(data)};
|
||||
return encodeSegments(segs, ecl);
|
||||
}
|
||||
|
||||
|
||||
QrCode QrCode::encodeSegments(const vector<QrSegment> &segs, Ecc ecl,
|
||||
int minVersion, int maxVersion, int mask, bool boostEcl) {
|
||||
if (!(MIN_VERSION <= minVersion && minVersion <= maxVersion && maxVersion <= MAX_VERSION) || mask < -1 || mask > 7)
|
||||
throw std::invalid_argument("Invalid value");
|
||||
|
||||
// Find the minimal version number to use
|
||||
int version, dataUsedBits;
|
||||
for (version = minVersion; ; version++) {
|
||||
int dataCapacityBits = getNumDataCodewords(version, ecl) * 8; // Number of data bits available
|
||||
dataUsedBits = QrSegment::getTotalBits(segs, version);
|
||||
if (dataUsedBits != -1 && dataUsedBits <= dataCapacityBits)
|
||||
break; // This version number is found to be suitable
|
||||
if (version >= maxVersion) { // All versions in the range could not fit the given data
|
||||
std::ostringstream sb;
|
||||
if (dataUsedBits == -1)
|
||||
sb << "Segment too long";
|
||||
else {
|
||||
sb << "Data length = " << dataUsedBits << " bits, ";
|
||||
sb << "Max capacity = " << dataCapacityBits << " bits";
|
||||
}
|
||||
throw data_too_long(sb.str());
|
||||
}
|
||||
}
|
||||
if (dataUsedBits == -1)
|
||||
throw std::logic_error("Assertion error");
|
||||
|
||||
// Increase the error correction level while the data still fits in the current version number
|
||||
for (Ecc newEcl : vector<Ecc>{Ecc::MEDIUM, Ecc::QUARTILE, Ecc::HIGH}) { // From low to high
|
||||
if (boostEcl && dataUsedBits <= getNumDataCodewords(version, newEcl) * 8)
|
||||
ecl = newEcl;
|
||||
}
|
||||
|
||||
// Concatenate all segments to create the data bit string
|
||||
BitBuffer bb;
|
||||
for (const QrSegment &seg : segs) {
|
||||
bb.appendBits(static_cast<uint32_t>(seg.getMode().getModeBits()), 4);
|
||||
bb.appendBits(static_cast<uint32_t>(seg.getNumChars()), seg.getMode().numCharCountBits(version));
|
||||
bb.insert(bb.end(), seg.getData().begin(), seg.getData().end());
|
||||
}
|
||||
if (bb.size() != static_cast<unsigned int>(dataUsedBits))
|
||||
throw std::logic_error("Assertion error");
|
||||
|
||||
// Add terminator and pad up to a byte if applicable
|
||||
size_t dataCapacityBits = static_cast<size_t>(getNumDataCodewords(version, ecl)) * 8;
|
||||
if (bb.size() > dataCapacityBits)
|
||||
throw std::logic_error("Assertion error");
|
||||
bb.appendBits(0, std::min(4, static_cast<int>(dataCapacityBits - bb.size())));
|
||||
bb.appendBits(0, (8 - static_cast<int>(bb.size() % 8)) % 8);
|
||||
if (bb.size() % 8 != 0)
|
||||
throw std::logic_error("Assertion error");
|
||||
|
||||
// Pad with alternating bytes until data capacity is reached
|
||||
for (uint8_t padByte = 0xEC; bb.size() < dataCapacityBits; padByte ^= 0xEC ^ 0x11)
|
||||
bb.appendBits(padByte, 8);
|
||||
|
||||
// Pack bits into bytes in big endian
|
||||
vector<uint8_t> dataCodewords(bb.size() / 8);
|
||||
for (size_t i = 0; i < bb.size(); i++)
|
||||
dataCodewords[i >> 3] |= (bb.at(i) ? 1 : 0) << (7 - (i & 7));
|
||||
|
||||
// Create the QR Code object
|
||||
return QrCode(version, ecl, dataCodewords, mask);
|
||||
}
|
||||
|
||||
|
||||
QrCode::QrCode(int ver, Ecc ecl, const vector<uint8_t> &dataCodewords, int msk) :
|
||||
// Initialize fields and check arguments
|
||||
version(ver),
|
||||
errorCorrectionLevel(ecl) {
|
||||
if (ver < MIN_VERSION || ver > MAX_VERSION)
|
||||
throw std::domain_error("Version value out of range");
|
||||
if (msk < -1 || msk > 7)
|
||||
throw std::domain_error("Mask value out of range");
|
||||
size = ver * 4 + 17;
|
||||
size_t sz = static_cast<size_t>(size);
|
||||
modules = vector<vector<bool> >(sz, vector<bool>(sz)); // Initially all white
|
||||
isFunction = vector<vector<bool> >(sz, vector<bool>(sz));
|
||||
|
||||
// Compute ECC, draw modules
|
||||
drawFunctionPatterns();
|
||||
const vector<uint8_t> allCodewords = addEccAndInterleave(dataCodewords);
|
||||
drawCodewords(allCodewords);
|
||||
|
||||
// Do masking
|
||||
if (msk == -1) { // Automatically choose best mask
|
||||
long minPenalty = LONG_MAX;
|
||||
for (int i = 0; i < 8; i++) {
|
||||
applyMask(i);
|
||||
drawFormatBits(i);
|
||||
long penalty = getPenaltyScore();
|
||||
if (penalty < minPenalty) {
|
||||
msk = i;
|
||||
minPenalty = penalty;
|
||||
}
|
||||
applyMask(i); // Undoes the mask due to XOR
|
||||
}
|
||||
}
|
||||
if (msk < 0 || msk > 7)
|
||||
throw std::logic_error("Assertion error");
|
||||
this->mask = msk;
|
||||
applyMask(msk); // Apply the final choice of mask
|
||||
drawFormatBits(msk); // Overwrite old format bits
|
||||
|
||||
isFunction.clear();
|
||||
isFunction.shrink_to_fit();
|
||||
}
|
||||
|
||||
|
||||
int QrCode::getVersion() const {
|
||||
return version;
|
||||
}
|
||||
|
||||
|
||||
int QrCode::getSize() const {
|
||||
return size;
|
||||
}
|
||||
|
||||
|
||||
QrCode::Ecc QrCode::getErrorCorrectionLevel() const {
|
||||
return errorCorrectionLevel;
|
||||
}
|
||||
|
||||
|
||||
int QrCode::getMask() const {
|
||||
return mask;
|
||||
}
|
||||
|
||||
|
||||
bool QrCode::getModule(int x, int y) const {
|
||||
return 0 <= x && x < size && 0 <= y && y < size && module(x, y);
|
||||
}
|
||||
|
||||
|
||||
std::string QrCode::toSvgString(int border) const {
|
||||
if (border < 0)
|
||||
throw std::domain_error("Border must be non-negative");
|
||||
if (border > INT_MAX / 2 || border * 2 > INT_MAX - size)
|
||||
throw std::overflow_error("Border too large");
|
||||
|
||||
std::ostringstream sb;
|
||||
sb << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";
|
||||
sb << "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n";
|
||||
sb << "<svg xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\" viewBox=\"0 0 ";
|
||||
sb << (size + border * 2) << " " << (size + border * 2) << "\" stroke=\"none\">\n";
|
||||
sb << "\t<rect width=\"100%\" height=\"100%\" fill=\"#FFFFFF\"/>\n";
|
||||
sb << "\t<path d=\"";
|
||||
for (int y = 0; y < size; y++) {
|
||||
for (int x = 0; x < size; x++) {
|
||||
if (getModule(x, y)) {
|
||||
if (x != 0 || y != 0)
|
||||
sb << " ";
|
||||
sb << "M" << (x + border) << "," << (y + border) << "h1v1h-1z";
|
||||
}
|
||||
}
|
||||
}
|
||||
sb << "\" fill=\"#000000\"/>\n";
|
||||
sb << "</svg>\n";
|
||||
return sb.str();
|
||||
}
|
||||
|
||||
|
||||
void QrCode::drawFunctionPatterns() {
|
||||
// Draw horizontal and vertical timing patterns
|
||||
for (int i = 0; i < size; i++) {
|
||||
setFunctionModule(6, i, i % 2 == 0);
|
||||
setFunctionModule(i, 6, i % 2 == 0);
|
||||
}
|
||||
|
||||
// Draw 3 finder patterns (all corners except bottom right; overwrites some timing modules)
|
||||
drawFinderPattern(3, 3);
|
||||
drawFinderPattern(size - 4, 3);
|
||||
drawFinderPattern(3, size - 4);
|
||||
|
||||
// Draw numerous alignment patterns
|
||||
const vector<int> alignPatPos = getAlignmentPatternPositions();
|
||||
size_t numAlign = alignPatPos.size();
|
||||
for (size_t i = 0; i < numAlign; i++) {
|
||||
for (size_t j = 0; j < numAlign; j++) {
|
||||
// Don't draw on the three finder corners
|
||||
if (!((i == 0 && j == 0) || (i == 0 && j == numAlign - 1) || (i == numAlign - 1 && j == 0)))
|
||||
drawAlignmentPattern(alignPatPos.at(i), alignPatPos.at(j));
|
||||
}
|
||||
}
|
||||
|
||||
// Draw configuration data
|
||||
drawFormatBits(0); // Dummy mask value; overwritten later in the constructor
|
||||
drawVersion();
|
||||
}
|
||||
|
||||
|
||||
void QrCode::drawFormatBits(int msk) {
|
||||
// Calculate error correction code and pack bits
|
||||
int data = getFormatBits(errorCorrectionLevel) << 3 | msk; // errCorrLvl is uint2, msk is uint3
|
||||
int rem = data;
|
||||
for (int i = 0; i < 10; i++)
|
||||
rem = (rem << 1) ^ ((rem >> 9) * 0x537);
|
||||
int bits = (data << 10 | rem) ^ 0x5412; // uint15
|
||||
if (bits >> 15 != 0)
|
||||
throw std::logic_error("Assertion error");
|
||||
|
||||
// Draw first copy
|
||||
for (int i = 0; i <= 5; i++)
|
||||
setFunctionModule(8, i, getBit(bits, i));
|
||||
setFunctionModule(8, 7, getBit(bits, 6));
|
||||
setFunctionModule(8, 8, getBit(bits, 7));
|
||||
setFunctionModule(7, 8, getBit(bits, 8));
|
||||
for (int i = 9; i < 15; i++)
|
||||
setFunctionModule(14 - i, 8, getBit(bits, i));
|
||||
|
||||
// Draw second copy
|
||||
for (int i = 0; i < 8; i++)
|
||||
setFunctionModule(size - 1 - i, 8, getBit(bits, i));
|
||||
for (int i = 8; i < 15; i++)
|
||||
setFunctionModule(8, size - 15 + i, getBit(bits, i));
|
||||
setFunctionModule(8, size - 8, true); // Always black
|
||||
}
|
||||
|
||||
|
||||
void QrCode::drawVersion() {
|
||||
if (version < 7)
|
||||
return;
|
||||
|
||||
// Calculate error correction code and pack bits
|
||||
int rem = version; // version is uint6, in the range [7, 40]
|
||||
for (int i = 0; i < 12; i++)
|
||||
rem = (rem << 1) ^ ((rem >> 11) * 0x1F25);
|
||||
long bits = static_cast<long>(version) << 12 | rem; // uint18
|
||||
if (bits >> 18 != 0)
|
||||
throw std::logic_error("Assertion error");
|
||||
|
||||
// Draw two copies
|
||||
for (int i = 0; i < 18; i++) {
|
||||
bool bit = getBit(bits, i);
|
||||
int a = size - 11 + i % 3;
|
||||
int b = i / 3;
|
||||
setFunctionModule(a, b, bit);
|
||||
setFunctionModule(b, a, bit);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void QrCode::drawFinderPattern(int x, int y) {
|
||||
for (int dy = -4; dy <= 4; dy++) {
|
||||
for (int dx = -4; dx <= 4; dx++) {
|
||||
int dist = std::max(std::abs(dx), std::abs(dy)); // 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);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void QrCode::drawAlignmentPattern(int x, int y) {
|
||||
for (int dy = -2; dy <= 2; dy++) {
|
||||
for (int dx = -2; dx <= 2; dx++)
|
||||
setFunctionModule(x + dx, y + dy, std::max(std::abs(dx), std::abs(dy)) != 1);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void QrCode::setFunctionModule(int x, int y, bool isBlack) {
|
||||
size_t ux = static_cast<size_t>(x);
|
||||
size_t uy = static_cast<size_t>(y);
|
||||
modules .at(uy).at(ux) = isBlack;
|
||||
isFunction.at(uy).at(ux) = true;
|
||||
}
|
||||
|
||||
|
||||
bool QrCode::module(int x, int y) const {
|
||||
return modules.at(static_cast<size_t>(y)).at(static_cast<size_t>(x));
|
||||
}
|
||||
|
||||
|
||||
vector<uint8_t> QrCode::addEccAndInterleave(const vector<uint8_t> &data) const {
|
||||
if (data.size() != static_cast<unsigned int>(getNumDataCodewords(version, errorCorrectionLevel)))
|
||||
throw std::invalid_argument("Invalid argument");
|
||||
|
||||
// Calculate parameter numbers
|
||||
int numBlocks = NUM_ERROR_CORRECTION_BLOCKS[static_cast<int>(errorCorrectionLevel)][version];
|
||||
int blockEccLen = ECC_CODEWORDS_PER_BLOCK [static_cast<int>(errorCorrectionLevel)][version];
|
||||
int rawCodewords = getNumRawDataModules(version) / 8;
|
||||
int numShortBlocks = numBlocks - rawCodewords % numBlocks;
|
||||
int shortBlockLen = rawCodewords / numBlocks;
|
||||
|
||||
// Split data into blocks and append ECC to each block
|
||||
vector<vector<uint8_t> > blocks;
|
||||
const vector<uint8_t> rsDiv = reedSolomonComputeDivisor(blockEccLen);
|
||||
for (int i = 0, k = 0; i < numBlocks; i++) {
|
||||
vector<uint8_t> dat(data.cbegin() + k, data.cbegin() + (k + shortBlockLen - blockEccLen + (i < numShortBlocks ? 0 : 1)));
|
||||
k += static_cast<int>(dat.size());
|
||||
const vector<uint8_t> ecc = reedSolomonComputeRemainder(dat, rsDiv);
|
||||
if (i < numShortBlocks)
|
||||
dat.push_back(0);
|
||||
dat.insert(dat.end(), ecc.cbegin(), ecc.cend());
|
||||
blocks.push_back(std::move(dat));
|
||||
}
|
||||
|
||||
// Interleave (not concatenate) the bytes from every block into a single sequence
|
||||
vector<uint8_t> result;
|
||||
for (size_t i = 0; i < blocks.at(0).size(); i++) {
|
||||
for (size_t j = 0; j < blocks.size(); j++) {
|
||||
// Skip the padding byte in short blocks
|
||||
if (i != static_cast<unsigned int>(shortBlockLen - blockEccLen) || j >= static_cast<unsigned int>(numShortBlocks))
|
||||
result.push_back(blocks.at(j).at(i));
|
||||
}
|
||||
}
|
||||
if (result.size() != static_cast<unsigned int>(rawCodewords))
|
||||
throw std::logic_error("Assertion error");
|
||||
return result;
|
||||
}
|
||||
|
||||
|
||||
void QrCode::drawCodewords(const vector<uint8_t> &data) {
|
||||
if (data.size() != static_cast<unsigned int>(getNumRawDataModules(version) / 8))
|
||||
throw std::invalid_argument("Invalid argument");
|
||||
|
||||
size_t i = 0; // Bit index into the data
|
||||
// Do the funny zigzag scan
|
||||
for (int right = size - 1; right >= 1; right -= 2) { // Index of right column in each column pair
|
||||
if (right == 6)
|
||||
right = 5;
|
||||
for (int vert = 0; vert < size; vert++) { // Vertical counter
|
||||
for (int j = 0; j < 2; j++) {
|
||||
size_t x = static_cast<size_t>(right - j); // Actual x coordinate
|
||||
bool upward = ((right + 1) & 2) == 0;
|
||||
size_t y = static_cast<size_t>(upward ? size - 1 - vert : vert); // Actual y coordinate
|
||||
if (!isFunction.at(y).at(x) && i < data.size() * 8) {
|
||||
modules.at(y).at(x) = getBit(data.at(i >> 3), 7 - static_cast<int>(i & 7));
|
||||
i++;
|
||||
}
|
||||
// If this QR Code has any remainder bits (0 to 7), they were assigned as
|
||||
// 0/false/white by the constructor and are left unchanged by this method
|
||||
}
|
||||
}
|
||||
}
|
||||
if (i != data.size() * 8)
|
||||
throw std::logic_error("Assertion error");
|
||||
}
|
||||
|
||||
|
||||
void QrCode::applyMask(int msk) {
|
||||
if (msk < 0 || msk > 7)
|
||||
throw std::domain_error("Mask value out of range");
|
||||
size_t sz = static_cast<size_t>(size);
|
||||
for (size_t y = 0; y < sz; y++) {
|
||||
for (size_t x = 0; x < sz; x++) {
|
||||
bool invert;
|
||||
switch (msk) {
|
||||
case 0: invert = (x + y) % 2 == 0; break;
|
||||
case 1: invert = y % 2 == 0; break;
|
||||
case 2: invert = x % 3 == 0; break;
|
||||
case 3: invert = (x + y) % 3 == 0; break;
|
||||
case 4: invert = (x / 3 + y / 2) % 2 == 0; break;
|
||||
case 5: invert = x * y % 2 + x * y % 3 == 0; break;
|
||||
case 6: invert = (x * y % 2 + x * y % 3) % 2 == 0; break;
|
||||
case 7: invert = ((x + y) % 2 + x * y % 3) % 2 == 0; break;
|
||||
default: throw std::logic_error("Assertion error");
|
||||
}
|
||||
modules.at(y).at(x) = modules.at(y).at(x) ^ (invert & !isFunction.at(y).at(x));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
long QrCode::getPenaltyScore() const {
|
||||
long result = 0;
|
||||
|
||||
// Adjacent modules in row having same color, and finder-like patterns
|
||||
for (int y = 0; y < size; y++) {
|
||||
bool runColor = false;
|
||||
int runX = 0;
|
||||
std::array<int,7> runHistory = {};
|
||||
for (int x = 0; x < size; x++) {
|
||||
if (module(x, y) == runColor) {
|
||||
runX++;
|
||||
if (runX == 5)
|
||||
result += PENALTY_N1;
|
||||
else if (runX > 5)
|
||||
result++;
|
||||
} else {
|
||||
finderPenaltyAddHistory(runX, runHistory);
|
||||
if (!runColor)
|
||||
result += finderPenaltyCountPatterns(runHistory) * PENALTY_N3;
|
||||
runColor = module(x, y);
|
||||
runX = 1;
|
||||
}
|
||||
}
|
||||
result += finderPenaltyTerminateAndCount(runColor, runX, runHistory) * PENALTY_N3;
|
||||
}
|
||||
// Adjacent modules in column having same color, and finder-like patterns
|
||||
for (int x = 0; x < size; x++) {
|
||||
bool runColor = false;
|
||||
int runY = 0;
|
||||
std::array<int,7> runHistory = {};
|
||||
for (int y = 0; y < size; y++) {
|
||||
if (module(x, y) == runColor) {
|
||||
runY++;
|
||||
if (runY == 5)
|
||||
result += PENALTY_N1;
|
||||
else if (runY > 5)
|
||||
result++;
|
||||
} else {
|
||||
finderPenaltyAddHistory(runY, runHistory);
|
||||
if (!runColor)
|
||||
result += finderPenaltyCountPatterns(runHistory) * PENALTY_N3;
|
||||
runColor = module(x, y);
|
||||
runY = 1;
|
||||
}
|
||||
}
|
||||
result += finderPenaltyTerminateAndCount(runColor, runY, runHistory) * PENALTY_N3;
|
||||
}
|
||||
|
||||
// 2*2 blocks of modules having same color
|
||||
for (int y = 0; y < size - 1; y++) {
|
||||
for (int x = 0; x < size - 1; x++) {
|
||||
bool color = module(x, y);
|
||||
if ( color == module(x + 1, y) &&
|
||||
color == module(x, y + 1) &&
|
||||
color == module(x + 1, y + 1))
|
||||
result += PENALTY_N2;
|
||||
}
|
||||
}
|
||||
|
||||
// Balance of black and white modules
|
||||
int black = 0;
|
||||
for (const vector<bool> &row : modules) {
|
||||
for (bool color : row) {
|
||||
if (color)
|
||||
black++;
|
||||
}
|
||||
}
|
||||
int total = size * size; // Note that size is odd, so black/total != 1/2
|
||||
// Compute the smallest integer k >= 0 such that (45-5k)% <= black/total <= (55+5k)%
|
||||
int k = static_cast<int>((std::abs(black * 20L - total * 10L) + total - 1) / total) - 1;
|
||||
result += k * PENALTY_N4;
|
||||
return result;
|
||||
}
|
||||
|
||||
|
||||
vector<int> QrCode::getAlignmentPatternPositions() const {
|
||||
if (version == 1)
|
||||
return vector<int>();
|
||||
else {
|
||||
int numAlign = version / 7 + 2;
|
||||
int step = (version == 32) ? 26 :
|
||||
(version*4 + numAlign*2 + 1) / (numAlign*2 - 2) * 2;
|
||||
vector<int> result;
|
||||
for (int i = 0, pos = size - 7; i < numAlign - 1; i++, pos -= step)
|
||||
result.insert(result.begin(), pos);
|
||||
result.insert(result.begin(), 6);
|
||||
return result;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
int QrCode::getNumRawDataModules(int ver) {
|
||||
if (ver < MIN_VERSION || ver > MAX_VERSION)
|
||||
throw std::domain_error("Version number out of range");
|
||||
int result = (16 * ver + 128) * ver + 64;
|
||||
if (ver >= 2) {
|
||||
int numAlign = ver / 7 + 2;
|
||||
result -= (25 * numAlign - 10) * numAlign - 55;
|
||||
if (ver >= 7)
|
||||
result -= 36;
|
||||
}
|
||||
if (!(208 <= result && result <= 29648))
|
||||
throw std::logic_error("Assertion error");
|
||||
return result;
|
||||
}
|
||||
|
||||
|
||||
int QrCode::getNumDataCodewords(int ver, Ecc ecl) {
|
||||
return getNumRawDataModules(ver) / 8
|
||||
- ECC_CODEWORDS_PER_BLOCK [static_cast<int>(ecl)][ver]
|
||||
* NUM_ERROR_CORRECTION_BLOCKS[static_cast<int>(ecl)][ver];
|
||||
}
|
||||
|
||||
|
||||
vector<uint8_t> QrCode::reedSolomonComputeDivisor(int degree) {
|
||||
if (degree < 1 || degree > 255)
|
||||
throw std::domain_error("Degree out of range");
|
||||
// Polynomial coefficients are stored from highest to lowest power, excluding the leading term which is always 1.
|
||||
// For example the polynomial x^3 + 255x^2 + 8x + 93 is stored as the uint8 array {255, 8, 93}.
|
||||
vector<uint8_t> result(static_cast<size_t>(degree));
|
||||
result.at(result.size() - 1) = 1; // Start off with the monomial x^0
|
||||
|
||||
// Compute the product polynomial (x - r^0) * (x - r^1) * (x - r^2) * ... * (x - r^{degree-1}),
|
||||
// and drop the highest monomial term which is always 1x^degree.
|
||||
// Note that r = 0x02, which is a generator element of this field GF(2^8/0x11D).
|
||||
uint8_t root = 1;
|
||||
for (int i = 0; i < degree; i++) {
|
||||
// Multiply the current product by (x - r^i)
|
||||
for (size_t j = 0; j < result.size(); j++) {
|
||||
result.at(j) = reedSolomonMultiply(result.at(j), root);
|
||||
if (j + 1 < result.size())
|
||||
result.at(j) ^= result.at(j + 1);
|
||||
}
|
||||
root = reedSolomonMultiply(root, 0x02);
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
|
||||
vector<uint8_t> QrCode::reedSolomonComputeRemainder(const vector<uint8_t> &data, const vector<uint8_t> &divisor) {
|
||||
vector<uint8_t> result(divisor.size());
|
||||
for (uint8_t b : data) { // Polynomial division
|
||||
uint8_t factor = b ^ result.at(0);
|
||||
result.erase(result.begin());
|
||||
result.push_back(0);
|
||||
for (size_t i = 0; i < result.size(); i++)
|
||||
result.at(i) ^= reedSolomonMultiply(divisor.at(i), factor);
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
|
||||
uint8_t QrCode::reedSolomonMultiply(uint8_t x, uint8_t y) {
|
||||
// Russian peasant multiplication
|
||||
int z = 0;
|
||||
for (int i = 7; i >= 0; i--) {
|
||||
z = (z << 1) ^ ((z >> 7) * 0x11D);
|
||||
z ^= ((y >> i) & 1) * x;
|
||||
}
|
||||
if (z >> 8 != 0)
|
||||
throw std::logic_error("Assertion error");
|
||||
return static_cast<uint8_t>(z);
|
||||
}
|
||||
|
||||
|
||||
int QrCode::finderPenaltyCountPatterns(const std::array<int,7> &runHistory) const {
|
||||
int n = runHistory.at(1);
|
||||
if (n > size * 3)
|
||||
throw std::logic_error("Assertion error");
|
||||
bool core = n > 0 && runHistory.at(2) == n && runHistory.at(3) == n * 3 && runHistory.at(4) == n && runHistory.at(5) == n;
|
||||
return (core && runHistory.at(0) >= n * 4 && runHistory.at(6) >= n ? 1 : 0)
|
||||
+ (core && runHistory.at(6) >= n * 4 && runHistory.at(0) >= n ? 1 : 0);
|
||||
}
|
||||
|
||||
|
||||
int QrCode::finderPenaltyTerminateAndCount(bool currentRunColor, int currentRunLength, std::array<int,7> &runHistory) const {
|
||||
if (currentRunColor) { // Terminate black run
|
||||
finderPenaltyAddHistory(currentRunLength, runHistory);
|
||||
currentRunLength = 0;
|
||||
}
|
||||
currentRunLength += size; // Add white border to final run
|
||||
finderPenaltyAddHistory(currentRunLength, runHistory);
|
||||
return finderPenaltyCountPatterns(runHistory);
|
||||
}
|
||||
|
||||
|
||||
void QrCode::finderPenaltyAddHistory(int currentRunLength, std::array<int,7> &runHistory) const {
|
||||
if (runHistory.at(0) == 0)
|
||||
currentRunLength += size; // Add white border to initial run
|
||||
std::copy_backward(runHistory.cbegin(), runHistory.cend() - 1, runHistory.end());
|
||||
runHistory.at(0) = currentRunLength;
|
||||
}
|
||||
|
||||
|
||||
bool QrCode::getBit(long x, int i) {
|
||||
return ((x >> i) & 1) != 0;
|
||||
}
|
||||
|
||||
|
||||
/*---- Tables of constants ----*/
|
||||
|
||||
const int QrCode::PENALTY_N1 = 3;
|
||||
const int QrCode::PENALTY_N2 = 3;
|
||||
const int QrCode::PENALTY_N3 = 40;
|
||||
const int QrCode::PENALTY_N4 = 10;
|
||||
|
||||
|
||||
const int8_t QrCode::ECC_CODEWORDS_PER_BLOCK[4][41] = {
|
||||
// Version: (note that index 0 is for padding, and is set to an illegal value)
|
||||
//0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40 Error correction level
|
||||
{-1, 7, 10, 15, 20, 26, 18, 20, 24, 30, 18, 20, 24, 26, 30, 22, 24, 28, 30, 28, 28, 28, 28, 30, 30, 26, 28, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30}, // Low
|
||||
{-1, 10, 16, 26, 18, 24, 16, 18, 22, 22, 26, 30, 22, 22, 24, 24, 28, 28, 26, 26, 26, 26, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28}, // Medium
|
||||
{-1, 13, 22, 18, 26, 18, 24, 18, 22, 20, 24, 28, 26, 24, 20, 30, 24, 28, 28, 26, 30, 28, 30, 30, 30, 30, 28, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30}, // Quartile
|
||||
{-1, 17, 28, 22, 16, 22, 28, 26, 26, 24, 28, 24, 28, 22, 24, 24, 30, 28, 28, 26, 28, 30, 24, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30}, // High
|
||||
};
|
||||
|
||||
const int8_t QrCode::NUM_ERROR_CORRECTION_BLOCKS[4][41] = {
|
||||
// Version: (note that index 0 is for padding, and is set to an illegal value)
|
||||
//0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40 Error correction level
|
||||
{-1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 4, 4, 4, 4, 4, 6, 6, 6, 6, 7, 8, 8, 9, 9, 10, 12, 12, 12, 13, 14, 15, 16, 17, 18, 19, 19, 20, 21, 22, 24, 25}, // Low
|
||||
{-1, 1, 1, 1, 2, 2, 4, 4, 4, 5, 5, 5, 8, 9, 9, 10, 10, 11, 13, 14, 16, 17, 17, 18, 20, 21, 23, 25, 26, 28, 29, 31, 33, 35, 37, 38, 40, 43, 45, 47, 49}, // Medium
|
||||
{-1, 1, 1, 2, 2, 4, 4, 6, 6, 8, 8, 8, 10, 12, 16, 12, 17, 16, 18, 21, 20, 23, 23, 25, 27, 29, 34, 34, 35, 38, 40, 43, 45, 48, 51, 53, 56, 59, 62, 65, 68}, // Quartile
|
||||
{-1, 1, 1, 2, 4, 4, 4, 5, 6, 8, 8, 11, 11, 16, 16, 18, 16, 19, 21, 25, 25, 25, 34, 30, 32, 35, 37, 40, 42, 45, 48, 51, 54, 57, 60, 63, 66, 70, 74, 77, 81}, // High
|
||||
};
|
||||
|
||||
|
||||
data_too_long::data_too_long(const std::string &msg) :
|
||||
std::length_error(msg) {}
|
||||
|
||||
|
||||
|
||||
BitBuffer::BitBuffer()
|
||||
: std::vector<bool>() {}
|
||||
|
||||
|
||||
void BitBuffer::appendBits(std::uint32_t val, int len) {
|
||||
if (len < 0 || len > 31 || val >> len != 0)
|
||||
throw std::domain_error("Value out of range");
|
||||
for (int i = len - 1; i >= 0; i--) // Append bit by bit
|
||||
this->push_back(((val >> i) & 1) != 0);
|
||||
}
|
||||
|
||||
}
|
||||
556
src/anpro/QrCode.h
Normal file
556
src/anpro/QrCode.h
Normal file
|
|
@ -0,0 +1,556 @@
|
|||
/*
|
||||
* QR Code generator library (C++)
|
||||
*
|
||||
* Copyright (c) Project Nayuki. (MIT License)
|
||||
* https://www.nayuki.io/page/qr-code-generator-library
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy of
|
||||
* this software and associated documentation files (the "Software"), to deal in
|
||||
* the Software without restriction, including without limitation the rights to
|
||||
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
|
||||
* the Software, and to permit persons to whom the Software is furnished to do so,
|
||||
* subject to the following conditions:
|
||||
* - The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
* - The Software is provided "as is", without warranty of any kind, express or
|
||||
* implied, including but not limited to the warranties of merchantability,
|
||||
* fitness for a particular purpose and noninfringement. In no event shall the
|
||||
* authors or copyright holders be liable for any claim, damages or other
|
||||
* liability, whether in an action of contract, tort or otherwise, arising from,
|
||||
* out of or in connection with the Software or the use or other dealings in the
|
||||
* Software.
|
||||
*/
|
||||
|
||||
#pragma once
|
||||
|
||||
#include <array>
|
||||
#include <cstdint>
|
||||
#include <stdexcept>
|
||||
#include <string>
|
||||
#include <vector>
|
||||
|
||||
|
||||
namespace qrcodegen {
|
||||
|
||||
/*
|
||||
* A segment of character/binary/control data in a QR Code symbol.
|
||||
* Instances of this class are immutable.
|
||||
* The mid-level way to create a segment is to take the payload data
|
||||
* and call a static factory function such as QrSegment::makeNumeric().
|
||||
* The low-level way to create a segment is to custom-make the bit buffer
|
||||
* and call the QrSegment() constructor with appropriate values.
|
||||
* This segment class imposes no length restrictions, but QR Codes have restrictions.
|
||||
* Even in the most favorable conditions, a QR Code can only hold 7089 characters of data.
|
||||
* Any segment longer than this is meaningless for the purpose of generating QR Codes.
|
||||
*/
|
||||
class QrSegment final {
|
||||
|
||||
/*---- Public helper enumeration ----*/
|
||||
|
||||
/*
|
||||
* Describes how a segment's data bits are interpreted. Immutable.
|
||||
*/
|
||||
public: class Mode final {
|
||||
|
||||
/*-- Constants --*/
|
||||
|
||||
public: static const Mode NUMERIC;
|
||||
public: static const Mode ALPHANUMERIC;
|
||||
public: static const Mode BYTE;
|
||||
public: static const Mode KANJI;
|
||||
public: static const Mode ECI;
|
||||
|
||||
|
||||
/*-- Fields --*/
|
||||
|
||||
// The mode indicator bits, which is a uint4 value (range 0 to 15).
|
||||
private: int modeBits;
|
||||
|
||||
// Number of character count bits for three different version ranges.
|
||||
private: int numBitsCharCount[3];
|
||||
|
||||
|
||||
/*-- Constructor --*/
|
||||
|
||||
private: Mode(int mode, int cc0, int cc1, int cc2);
|
||||
|
||||
|
||||
/*-- Methods --*/
|
||||
|
||||
/*
|
||||
* (Package-private) Returns the mode indicator bits, which is an unsigned 4-bit value (range 0 to 15).
|
||||
*/
|
||||
public: int getModeBits() const;
|
||||
|
||||
/*
|
||||
* (Package-private) Returns the bit width of the character count field for a segment in
|
||||
* this mode in a QR Code at the given version number. The result is in the range [0, 16].
|
||||
*/
|
||||
public: int numCharCountBits(int ver) const;
|
||||
|
||||
};
|
||||
|
||||
|
||||
|
||||
/*---- Static factory functions (mid level) ----*/
|
||||
|
||||
/*
|
||||
* Returns a segment representing the given binary data encoded in
|
||||
* byte mode. All input byte vectors are acceptable. Any text string
|
||||
* can be converted to UTF-8 bytes and encoded as a byte mode segment.
|
||||
*/
|
||||
public: static QrSegment makeBytes(const std::vector<std::uint8_t> &data);
|
||||
|
||||
|
||||
/*
|
||||
* Returns a segment representing the given string of decimal digits encoded in numeric mode.
|
||||
*/
|
||||
public: static QrSegment makeNumeric(const char *digits);
|
||||
|
||||
|
||||
/*
|
||||
* Returns a segment representing the given text string encoded in alphanumeric mode.
|
||||
* The characters allowed are: 0 to 9, A to Z (uppercase only), space,
|
||||
* dollar, percent, asterisk, plus, hyphen, period, slash, colon.
|
||||
*/
|
||||
public: static QrSegment makeAlphanumeric(const char *text);
|
||||
|
||||
|
||||
/*
|
||||
* Returns a list of zero or more segments to represent the given text string. The result
|
||||
* may use various segment modes and switch modes to optimize the length of the bit stream.
|
||||
*/
|
||||
public: static std::vector<QrSegment> makeSegments(const char *text);
|
||||
|
||||
|
||||
/*
|
||||
* Returns a segment representing an Extended Channel Interpretation
|
||||
* (ECI) designator with the given assignment value.
|
||||
*/
|
||||
public: static QrSegment makeEci(long assignVal);
|
||||
|
||||
|
||||
/*---- Public static helper functions ----*/
|
||||
|
||||
/*
|
||||
* Tests whether the given string can be encoded as a segment in alphanumeric mode.
|
||||
* A string is encodable iff each character is in the following set: 0 to 9, A to Z
|
||||
* (uppercase only), space, dollar, percent, asterisk, plus, hyphen, period, slash, colon.
|
||||
*/
|
||||
public: static bool isAlphanumeric(const char *text);
|
||||
|
||||
|
||||
/*
|
||||
* Tests whether the given string can be encoded as a segment in numeric mode.
|
||||
* A string is encodable iff each character is in the range 0 to 9.
|
||||
*/
|
||||
public: static bool isNumeric(const char *text);
|
||||
|
||||
|
||||
|
||||
/*---- Instance fields ----*/
|
||||
|
||||
/* The mode indicator of this segment. Accessed through getMode(). */
|
||||
private: Mode mode;
|
||||
|
||||
/* The length of this segment's unencoded data. Measured in characters for
|
||||
* numeric/alphanumeric/kanji mode, bytes for byte mode, and 0 for ECI mode.
|
||||
* Always zero or positive. Not the same as the data's bit length.
|
||||
* Accessed through getNumChars(). */
|
||||
private: int numChars;
|
||||
|
||||
/* The data bits of this segment. Accessed through getData(). */
|
||||
private: std::vector<bool> data;
|
||||
|
||||
|
||||
/*---- Constructors (low level) ----*/
|
||||
|
||||
/*
|
||||
* Creates a new QR Code segment with the given attributes and data.
|
||||
* The character count (numCh) must agree with the mode and the bit buffer length,
|
||||
* but the constraint isn't checked. The given bit buffer is copied and stored.
|
||||
*/
|
||||
public: QrSegment(Mode md, int numCh, const std::vector<bool> &dt);
|
||||
|
||||
|
||||
/*
|
||||
* Creates a new QR Code segment with the given parameters and data.
|
||||
* The character count (numCh) must agree with the mode and the bit buffer length,
|
||||
* but the constraint isn't checked. The given bit buffer is moved and stored.
|
||||
*/
|
||||
public: QrSegment(Mode md, int numCh, std::vector<bool> &&dt);
|
||||
|
||||
|
||||
/*---- Methods ----*/
|
||||
|
||||
/*
|
||||
* Returns the mode field of this segment.
|
||||
*/
|
||||
public: Mode getMode() const;
|
||||
|
||||
|
||||
/*
|
||||
* Returns the character count field of this segment.
|
||||
*/
|
||||
public: int getNumChars() const;
|
||||
|
||||
|
||||
/*
|
||||
* Returns the data bits of this segment.
|
||||
*/
|
||||
public: const std::vector<bool> &getData() const;
|
||||
|
||||
|
||||
// (Package-private) Calculates the number of bits needed to encode the given segments at
|
||||
// the given version. Returns a non-negative number if successful. Otherwise returns -1 if a
|
||||
// segment has too many characters to fit its length field, or the total bits exceeds INT_MAX.
|
||||
public: static int getTotalBits(const std::vector<QrSegment> &segs, int version);
|
||||
|
||||
|
||||
/*---- Private constant ----*/
|
||||
|
||||
/* The set of all legal characters in alphanumeric mode, where
|
||||
* each character value maps to the index in the string. */
|
||||
private: static const char *ALPHANUMERIC_CHARSET;
|
||||
|
||||
};
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* A QR Code symbol, which is a type of two-dimension barcode.
|
||||
* Invented by Denso Wave and described in the ISO/IEC 18004 standard.
|
||||
* Instances of this class represent an immutable square grid of black and white cells.
|
||||
* The class provides static factory functions to create a QR Code from text or binary data.
|
||||
* The class covers the QR Code Model 2 specification, supporting all versions (sizes)
|
||||
* from 1 to 40, all 4 error correction levels, and 4 character encoding modes.
|
||||
*
|
||||
* Ways to create a QR Code object:
|
||||
* - High level: Take the payload data and call QrCode::encodeText() or QrCode::encodeBinary().
|
||||
* - Mid level: Custom-make the list of segments and call QrCode::encodeSegments().
|
||||
* - Low level: Custom-make the array of data codeword bytes (including
|
||||
* segment headers and final padding, excluding error correction codewords),
|
||||
* supply the appropriate version number, and call the QrCode() constructor.
|
||||
* (Note that all ways require supplying the desired error correction level.)
|
||||
*/
|
||||
class QrCode final {
|
||||
|
||||
/*---- Public helper enumeration ----*/
|
||||
|
||||
/*
|
||||
* The error correction level in a QR Code symbol.
|
||||
*/
|
||||
public: enum class Ecc {
|
||||
LOW = 0 , // The QR Code can tolerate about 7% erroneous codewords
|
||||
MEDIUM , // The QR Code can tolerate about 15% erroneous codewords
|
||||
QUARTILE, // The QR Code can tolerate about 25% erroneous codewords
|
||||
HIGH , // The QR Code can tolerate about 30% erroneous codewords
|
||||
};
|
||||
|
||||
|
||||
// Returns a value in the range 0 to 3 (unsigned 2-bit integer).
|
||||
private: static int getFormatBits(Ecc ecl);
|
||||
|
||||
|
||||
|
||||
/*---- Static factory functions (high level) ----*/
|
||||
|
||||
/*
|
||||
* Returns a QR Code representing the given Unicode text string at the given error correction level.
|
||||
* As a conservative upper bound, this function is guaranteed to succeed for strings that have 2953 or fewer
|
||||
* UTF-8 code units (not Unicode code points) if the low error correction level is used. The smallest possible
|
||||
* QR Code version is automatically chosen for the output. The ECC level of the result may be higher than
|
||||
* the ecl argument if it can be done without increasing the version.
|
||||
*/
|
||||
public: static QrCode encodeText(const char *text, Ecc ecl);
|
||||
|
||||
|
||||
/*
|
||||
* Returns a QR Code representing the given binary data at the given error correction level.
|
||||
* This function always encodes using the binary segment mode, not any text mode. The maximum number of
|
||||
* bytes allowed is 2953. The smallest possible QR Code version is automatically chosen for the output.
|
||||
* The ECC level of the result may be higher than the ecl argument if it can be done without increasing the version.
|
||||
*/
|
||||
public: static QrCode encodeBinary(const std::vector<std::uint8_t> &data, Ecc ecl);
|
||||
|
||||
|
||||
/*---- Static factory functions (mid level) ----*/
|
||||
|
||||
/*
|
||||
* Returns a QR Code representing the given segments with the given encoding parameters.
|
||||
* The smallest possible QR Code version within the given range is automatically
|
||||
* chosen for the output. Iff boostEcl is true, then the ECC level of the result
|
||||
* may be higher than the ecl argument if it can be done without increasing the
|
||||
* version. The mask number is either between 0 to 7 (inclusive) to force that
|
||||
* mask, or -1 to automatically choose an appropriate mask (which may be slow).
|
||||
* This function allows the user to create a custom sequence of segments that switches
|
||||
* between modes (such as alphanumeric and byte) to encode text in less space.
|
||||
* This is a mid-level API; the high-level API is encodeText() and encodeBinary().
|
||||
*/
|
||||
public: static QrCode encodeSegments(const std::vector<QrSegment> &segs, Ecc ecl,
|
||||
int minVersion=1, int maxVersion=40, int mask=-1, bool boostEcl=true); // All optional parameters
|
||||
|
||||
|
||||
|
||||
/*---- Instance fields ----*/
|
||||
|
||||
// Immutable scalar parameters:
|
||||
|
||||
/* The version number of this QR Code, which is between 1 and 40 (inclusive).
|
||||
* This determines the size of this barcode. */
|
||||
private: int version;
|
||||
|
||||
/* The width and height of this QR Code, measured in modules, between
|
||||
* 21 and 177 (inclusive). This is equal to version * 4 + 17. */
|
||||
private: int size;
|
||||
|
||||
/* The error correction level used in this QR Code. */
|
||||
private: Ecc errorCorrectionLevel;
|
||||
|
||||
/* The index of the mask pattern used in this QR Code, which is between 0 and 7 (inclusive).
|
||||
* Even if a QR Code is created with automatic masking requested (mask = -1),
|
||||
* the resulting object still has a mask value between 0 and 7. */
|
||||
private: int mask;
|
||||
|
||||
// Private grids of modules/pixels, with dimensions of size*size:
|
||||
|
||||
// The modules of this QR Code (false = white, true = black).
|
||||
// Immutable after constructor finishes. Accessed through getModule().
|
||||
private: std::vector<std::vector<bool> > modules;
|
||||
|
||||
// Indicates function modules that are not subjected to masking. Discarded when constructor finishes.
|
||||
private: std::vector<std::vector<bool> > isFunction;
|
||||
|
||||
|
||||
|
||||
/*---- Constructor (low level) ----*/
|
||||
|
||||
/*
|
||||
* Creates a new QR Code with the given version number,
|
||||
* error correction level, data codeword bytes, and mask number.
|
||||
* This is a low-level API that most users should not use directly.
|
||||
* A mid-level API is the encodeSegments() function.
|
||||
*/
|
||||
public: QrCode(int ver, Ecc ecl, const std::vector<std::uint8_t> &dataCodewords, int msk);
|
||||
|
||||
|
||||
|
||||
/*---- Public instance methods ----*/
|
||||
|
||||
/*
|
||||
* Returns this QR Code's version, in the range [1, 40].
|
||||
*/
|
||||
public: int getVersion() const;
|
||||
|
||||
|
||||
/*
|
||||
* Returns this QR Code's size, in the range [21, 177].
|
||||
*/
|
||||
public: int getSize() const;
|
||||
|
||||
|
||||
/*
|
||||
* Returns this QR Code's error correction level.
|
||||
*/
|
||||
public: Ecc getErrorCorrectionLevel() const;
|
||||
|
||||
|
||||
/*
|
||||
* Returns this QR Code's mask, in the range [0, 7].
|
||||
*/
|
||||
public: int getMask() const;
|
||||
|
||||
|
||||
/*
|
||||
* Returns the color of the module (pixel) at the given coordinates, which is false
|
||||
* for white or true for black. The top left corner has the coordinates (x=0, y=0).
|
||||
* If the given coordinates are out of bounds, then false (white) is returned.
|
||||
*/
|
||||
public: bool getModule(int x, int y) const;
|
||||
|
||||
|
||||
/*
|
||||
* Returns a string of SVG code for an image depicting this QR Code, with the given number
|
||||
* of border modules. The string always uses Unix newlines (\n), regardless of the platform.
|
||||
*/
|
||||
public: std::string toSvgString(int border) const;
|
||||
|
||||
|
||||
|
||||
/*---- Private helper methods for constructor: Drawing function modules ----*/
|
||||
|
||||
// Reads this object's version field, and draws and marks all function modules.
|
||||
private: void drawFunctionPatterns();
|
||||
|
||||
|
||||
// Draws two copies of the format bits (with its own error correction code)
|
||||
// based on the given mask and this object's error correction level field.
|
||||
private: void drawFormatBits(int msk);
|
||||
|
||||
|
||||
// Draws two copies of the version bits (with its own error correction code),
|
||||
// based on this object's version field, iff 7 <= version <= 40.
|
||||
private: void drawVersion();
|
||||
|
||||
|
||||
// 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);
|
||||
|
||||
|
||||
// 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);
|
||||
|
||||
|
||||
// Sets the color of a module and marks it as a function module.
|
||||
// Only used by the constructor. Coordinates must be in bounds.
|
||||
private: void setFunctionModule(int x, int y, bool isBlack);
|
||||
|
||||
|
||||
// Returns the color of the module at the given coordinates, which must be in range.
|
||||
private: bool module(int x, int y) const;
|
||||
|
||||
|
||||
/*---- Private helper methods for constructor: Codewords and masking ----*/
|
||||
|
||||
// Returns a new byte string representing the given data with the appropriate error correction
|
||||
// codewords appended to it, based on this object's version and error correction level.
|
||||
private: std::vector<std::uint8_t> addEccAndInterleave(const std::vector<std::uint8_t> &data) const;
|
||||
|
||||
|
||||
// Draws the given sequence of 8-bit codewords (data and error correction) onto the entire
|
||||
// data area of this QR Code. Function modules need to be marked off before this is called.
|
||||
private: void drawCodewords(const std::vector<std::uint8_t> &data);
|
||||
|
||||
|
||||
// XORs the codeword modules in this QR Code with the given mask pattern.
|
||||
// The function modules must be marked and the codeword bits must be drawn
|
||||
// before masking. Due to the arithmetic of XOR, calling applyMask() with
|
||||
// the same mask value a second time will undo the mask. A final well-formed
|
||||
// QR Code needs exactly one (not zero, two, etc.) mask applied.
|
||||
private: void applyMask(int msk);
|
||||
|
||||
|
||||
// Calculates and returns the penalty score based on state of this QR Code's current modules.
|
||||
// This is used by the automatic mask choice algorithm to find the mask pattern that yields the lowest score.
|
||||
private: long getPenaltyScore() const;
|
||||
|
||||
|
||||
|
||||
/*---- Private helper functions ----*/
|
||||
|
||||
// Returns an ascending list of positions of alignment patterns for this version number.
|
||||
// Each position is in the range [0,177), and are used on both the x and y axes.
|
||||
// This could be implemented as lookup table of 40 variable-length lists of unsigned bytes.
|
||||
private: std::vector<int> getAlignmentPatternPositions() const;
|
||||
|
||||
|
||||
// Returns the number of data bits that can be stored in a QR Code of the given version number, after
|
||||
// all function modules are excluded. This includes remainder bits, so it might not be a multiple of 8.
|
||||
// The result is in the range [208, 29648]. This could be implemented as a 40-entry lookup table.
|
||||
private: static int getNumRawDataModules(int ver);
|
||||
|
||||
|
||||
// Returns the number of 8-bit data (i.e. not error correction) codewords contained in any
|
||||
// QR Code of the given version number and error correction level, with remainder bits discarded.
|
||||
// This stateless pure function could be implemented as a (40*4)-cell lookup table.
|
||||
private: static int getNumDataCodewords(int ver, Ecc ecl);
|
||||
|
||||
|
||||
// Returns a Reed-Solomon ECC generator polynomial for the given degree. This could be
|
||||
// implemented as a lookup table over all possible parameter values, instead of as an algorithm.
|
||||
private: static std::vector<std::uint8_t> reedSolomonComputeDivisor(int degree);
|
||||
|
||||
|
||||
// Returns the Reed-Solomon error correction codeword for the given data and divisor polynomials.
|
||||
private: static std::vector<std::uint8_t> reedSolomonComputeRemainder(const std::vector<std::uint8_t> &data, const std::vector<std::uint8_t> &divisor);
|
||||
|
||||
|
||||
// Returns the product of the two given field elements modulo GF(2^8/0x11D).
|
||||
// All inputs are valid. This could be implemented as a 256*256 lookup table.
|
||||
private: static std::uint8_t reedSolomonMultiply(std::uint8_t x, std::uint8_t y);
|
||||
|
||||
|
||||
// Can only be called immediately after a white run is added, and
|
||||
// returns either 0, 1, or 2. A helper function for getPenaltyScore().
|
||||
private: int finderPenaltyCountPatterns(const std::array<int,7> &runHistory) const;
|
||||
|
||||
|
||||
// Must be called at the end of a line (row or column) of modules. A helper function for getPenaltyScore().
|
||||
private: int finderPenaltyTerminateAndCount(bool currentRunColor, int currentRunLength, std::array<int,7> &runHistory) const;
|
||||
|
||||
|
||||
// Pushes the given value to the front and drops the last value. A helper function for getPenaltyScore().
|
||||
private: void finderPenaltyAddHistory(int currentRunLength, std::array<int,7> &runHistory) const;
|
||||
|
||||
|
||||
// Returns true iff the i'th bit of x is set to 1.
|
||||
private: static bool getBit(long x, int i);
|
||||
|
||||
|
||||
/*---- Constants and tables ----*/
|
||||
|
||||
// The minimum version number supported in the QR Code Model 2 standard.
|
||||
public: static constexpr int MIN_VERSION = 1;
|
||||
|
||||
// The maximum version number supported in the QR Code Model 2 standard.
|
||||
public: static constexpr int MAX_VERSION = 40;
|
||||
|
||||
|
||||
// For use in getPenaltyScore(), when evaluating which mask is best.
|
||||
private: static const int PENALTY_N1;
|
||||
private: static const int PENALTY_N2;
|
||||
private: static const int PENALTY_N3;
|
||||
private: static const int PENALTY_N4;
|
||||
|
||||
|
||||
private: static const std::int8_t ECC_CODEWORDS_PER_BLOCK[4][41];
|
||||
private: static const std::int8_t NUM_ERROR_CORRECTION_BLOCKS[4][41];
|
||||
|
||||
};
|
||||
|
||||
|
||||
|
||||
/*---- Public exception class ----*/
|
||||
|
||||
/*
|
||||
* Thrown when the supplied data does not fit any QR Code version. Ways to handle this exception include:
|
||||
* - Decrease the error correction level if it was greater than Ecc::LOW.
|
||||
* - If the encodeSegments() function was called with a maxVersion argument, then increase
|
||||
* it if it was less than QrCode::MAX_VERSION. (This advice does not apply to the other
|
||||
* factory functions because they search all versions up to QrCode::MAX_VERSION.)
|
||||
* - Split the text data into better or optimal segments in order to reduce the number of bits required.
|
||||
* - Change the text or binary data to be shorter.
|
||||
* - Change the text to fit the character set of a particular segment mode (e.g. alphanumeric).
|
||||
* - Propagate the error upward to the caller/user.
|
||||
*/
|
||||
class data_too_long : public std::length_error {
|
||||
|
||||
public: explicit data_too_long(const std::string &msg);
|
||||
|
||||
};
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* An appendable sequence of bits (0s and 1s). Mainly used by QrSegment.
|
||||
*/
|
||||
class BitBuffer final : public std::vector<bool> {
|
||||
|
||||
/*---- Constructor ----*/
|
||||
|
||||
// Creates an empty bit buffer (length 0).
|
||||
public: BitBuffer();
|
||||
|
||||
|
||||
|
||||
/*---- Method ----*/
|
||||
|
||||
// Appends the given number of low-order bits of the given value
|
||||
// to this buffer. Requires 0 <= len <= 31 and val < 2^len.
|
||||
public: void appendBits(std::uint32_t val, int len);
|
||||
|
||||
};
|
||||
|
||||
}
|
||||
537
src/anpro/imagecropper.cpp
Normal file
537
src/anpro/imagecropper.cpp
Normal file
|
|
@ -0,0 +1,537 @@
|
|||
/*****************************************************************************
|
||||
* ImageCropper Qt Widget for cropping images
|
||||
* Copyright (C) 2013 Dimka Novikov, to@dimkanovikov.pro
|
||||
* Copyright (C) 2020 Syping
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 3 of the License, or any later version.
|
||||
*
|
||||
* This library is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public License
|
||||
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*****************************************************************************/
|
||||
|
||||
#include "imagecropper.h"
|
||||
#include "AppEnv.h"
|
||||
|
||||
#include <QPainterPath>
|
||||
#include <QMouseEvent>
|
||||
#include <QPainter>
|
||||
|
||||
namespace {
|
||||
static const QSize WIDGET_MINIMUM_SIZE(470, 470);
|
||||
}
|
||||
|
||||
ImageCropper::ImageCropper(QWidget* parent) :
|
||||
QWidget(parent),
|
||||
pimpl(new ImageCropperPrivate)
|
||||
{
|
||||
setMinimumSize(WIDGET_MINIMUM_SIZE);
|
||||
setMouseTracking(true);
|
||||
}
|
||||
|
||||
ImageCropper::~ImageCropper()
|
||||
{
|
||||
delete pimpl;
|
||||
}
|
||||
|
||||
void ImageCropper::setImage(const QPixmap& _image)
|
||||
{
|
||||
pimpl->imageForCropping = _image;
|
||||
update();
|
||||
}
|
||||
|
||||
void ImageCropper::setBackgroundColor(const QColor& _backgroundColor)
|
||||
{
|
||||
pimpl->backgroundColor = _backgroundColor;
|
||||
update();
|
||||
}
|
||||
|
||||
void ImageCropper::setCroppingRectBorderColor(const QColor& _borderColor)
|
||||
{
|
||||
pimpl->croppingRectBorderColor = _borderColor;
|
||||
update();
|
||||
}
|
||||
|
||||
void ImageCropper::setProportion(const QSizeF& _proportion)
|
||||
{
|
||||
// Пропорции хранятся в коэффициентах приращения сторон
|
||||
// Таким образом, при изменении размера области выделения,
|
||||
// размеры сторон изменяются на размер зависящий от
|
||||
// коэффициентов приращения.
|
||||
|
||||
// Сохраним пропорциональную зависимость области выделения в коэффициентах приращения сторон
|
||||
if (pimpl->proportion != _proportion) {
|
||||
pimpl->proportion = _proportion;
|
||||
// ... расчитаем коэффициенты
|
||||
float heightDelta = (float)_proportion.height() / _proportion.width();
|
||||
float widthDelta = (float)_proportion.width() / _proportion.height();
|
||||
// ... сохраним коэффициенты
|
||||
pimpl->deltas.setHeight(heightDelta);
|
||||
pimpl->deltas.setWidth(widthDelta);
|
||||
}
|
||||
|
||||
// Обновим пропорции области выделения
|
||||
if ( pimpl->isProportionFixed ) {
|
||||
float croppintRectSideRelation =
|
||||
(float)pimpl->croppingRect.width() / pimpl->croppingRect.height();
|
||||
float proportionSideRelation =
|
||||
(float)pimpl->proportion.width() / pimpl->proportion.height();
|
||||
// Если область выделения не соответствует необходимым пропорциям обновим её
|
||||
if (croppintRectSideRelation != proportionSideRelation) {
|
||||
bool widthShotrerThenHeight =
|
||||
pimpl->croppingRect.width() < pimpl->croppingRect.height();
|
||||
// ... установим размер той стороны, что длиннее
|
||||
if (widthShotrerThenHeight) {
|
||||
pimpl->croppingRect.setHeight(
|
||||
pimpl->croppingRect.width() * pimpl->deltas.height());
|
||||
} else {
|
||||
pimpl->croppingRect.setWidth(
|
||||
pimpl->croppingRect.height() * pimpl->deltas.width());
|
||||
}
|
||||
// ... перерисуем виджет
|
||||
update();
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
void ImageCropper::setProportionFixed(const bool _isFixed)
|
||||
{
|
||||
if (pimpl->isProportionFixed != _isFixed) {
|
||||
pimpl->isProportionFixed = _isFixed;
|
||||
setProportion(pimpl->proportion);
|
||||
}
|
||||
}
|
||||
|
||||
const QPixmap ImageCropper::cropImage()
|
||||
{
|
||||
// Получим размер отображаемого изображения
|
||||
QSize scaledImageSize =
|
||||
pimpl->imageForCropping.scaled(
|
||||
size(), Qt::KeepAspectRatio, Qt::SmoothTransformation
|
||||
).size();
|
||||
// Определим расстояние от левого и верхнего краёв
|
||||
float leftDelta = 0;
|
||||
float topDelta = 0;
|
||||
const float HALF_COUNT = 2;
|
||||
if (size().height() == scaledImageSize.height()) {
|
||||
leftDelta = (width() - scaledImageSize.width()) / HALF_COUNT;
|
||||
} else {
|
||||
topDelta = (height() - scaledImageSize.height()) / HALF_COUNT;
|
||||
}
|
||||
// Определим пропорцию области обрезки по отношению к исходному изображению
|
||||
float xScale = (float)pimpl->imageForCropping.width() / scaledImageSize.width();
|
||||
float yScale = (float)pimpl->imageForCropping.height() / scaledImageSize.height();
|
||||
// Расчитаем область обрезки с учётом коррекции размеров исходного изображения
|
||||
QRectF realSizeRect(
|
||||
QPointF(pimpl->croppingRect.left() - leftDelta, pimpl->croppingRect.top() - topDelta),
|
||||
pimpl->croppingRect.size());
|
||||
// ... корректируем левый и верхний края
|
||||
realSizeRect.setLeft((pimpl->croppingRect.left() - leftDelta) * xScale);
|
||||
realSizeRect.setTop ((pimpl->croppingRect.top() - topDelta) * yScale);
|
||||
// ... корректируем размер
|
||||
realSizeRect.setWidth(pimpl->croppingRect.width() * xScale);
|
||||
realSizeRect.setHeight(pimpl->croppingRect.height() * yScale);
|
||||
// Получаем обрезанное изображение
|
||||
return pimpl->imageForCropping.copy(realSizeRect.toRect());
|
||||
}
|
||||
|
||||
// ********
|
||||
// Protected section
|
||||
|
||||
void ImageCropper::paintEvent(QPaintEvent* _event)
|
||||
{
|
||||
QWidget::paintEvent(_event);
|
||||
//
|
||||
QPainter widgetPainter(this);
|
||||
// Рисуем изображение по центру виджета
|
||||
{
|
||||
#if QT_VERSION >= 0x050600
|
||||
qreal screenRatioPR = AppEnv::screenRatioPR();
|
||||
// ... подгоним изображение для отображения по размеру виджета
|
||||
QPixmap scaledImage =
|
||||
pimpl->imageForCropping.scaled(qRound((double)width() * screenRatioPR), qRound((double)height() * screenRatioPR), Qt::KeepAspectRatio, Qt::SmoothTransformation);
|
||||
scaledImage.setDevicePixelRatio(screenRatioPR);
|
||||
#else
|
||||
QPixmap scaledImage =
|
||||
pimpl->imageForCropping.scaled(size(), Qt::KeepAspectRatio, Qt::SmoothTransformation);
|
||||
#endif
|
||||
// ... заливаем фон
|
||||
widgetPainter.fillRect(rect(), pimpl->backgroundColor);
|
||||
// ... рисуем изображение по центру виджета
|
||||
#if QT_VERSION >= 0x050600
|
||||
if (qRound((double)height() * screenRatioPR) == scaledImage.height()) {
|
||||
widgetPainter.drawPixmap( ( qRound((double)width() * screenRatioPR) - scaledImage.width() ) / 2, 0, scaledImage );
|
||||
} else {
|
||||
widgetPainter.drawPixmap( 0, ( qRound((double)height() * screenRatioPR) - scaledImage.height() ) / 2, scaledImage );
|
||||
}
|
||||
#else
|
||||
if (height() == scaledImage.height()) {
|
||||
widgetPainter.drawPixmap( ( width()- scaledImage.width() ) / 2, 0, scaledImage );
|
||||
} else {
|
||||
widgetPainter.drawPixmap( 0, ( height() - scaledImage.height() ) / 2, scaledImage );
|
||||
}
|
||||
#endif
|
||||
}
|
||||
// Рисуем область обрезки
|
||||
{
|
||||
// ... если это первое отображение после инициилизации, то центруем областо обрезки
|
||||
if (pimpl->croppingRect.isNull()) {
|
||||
const int cwidth = WIDGET_MINIMUM_SIZE.width()/2;
|
||||
const int cheight = WIDGET_MINIMUM_SIZE.height()/2;
|
||||
pimpl->croppingRect.setSize(QSize(cwidth, cheight));
|
||||
float x = (width() - pimpl->croppingRect.width())/2;
|
||||
float y = (height() - pimpl->croppingRect.height())/2;
|
||||
pimpl->croppingRect.moveTo(x, y);
|
||||
}
|
||||
|
||||
// ... рисуем затемненную область
|
||||
QPainterPath p;
|
||||
p.addRect(pimpl->croppingRect);
|
||||
p.addRect(rect());
|
||||
widgetPainter.setBrush(QBrush(QColor(0,0,0,120)));
|
||||
widgetPainter.setPen(Qt::transparent);
|
||||
widgetPainter.drawPath(p);
|
||||
// Рамка и контрольные точки
|
||||
widgetPainter.setPen(pimpl->croppingRectBorderColor);
|
||||
// ... рисуем прямоугольник области обрезки
|
||||
{
|
||||
widgetPainter.setBrush(QBrush(Qt::transparent));
|
||||
widgetPainter.drawRect(pimpl->croppingRect);
|
||||
}
|
||||
// ... рисуем контрольные точки
|
||||
{
|
||||
widgetPainter.setBrush(QBrush(pimpl->croppingRectBorderColor));
|
||||
// Вспомогательные X координаты
|
||||
int leftXCoord = pimpl->croppingRect.left() - 2;
|
||||
int centerXCoord = pimpl->croppingRect.center().x() - 3;
|
||||
int rightXCoord = pimpl->croppingRect.right() - 2;
|
||||
// Вспомогательные Y координаты
|
||||
int topYCoord = pimpl->croppingRect.top() - 2;
|
||||
int middleYCoord = pimpl->croppingRect.center().y() - 3;
|
||||
int bottomYCoord = pimpl->croppingRect.bottom() - 2;
|
||||
//
|
||||
const QSize pointSize(6, 6);
|
||||
//
|
||||
QVector<QRect> points;
|
||||
points
|
||||
// левая сторона
|
||||
<< QRect( QPoint(leftXCoord, topYCoord), pointSize )
|
||||
<< QRect( QPoint(leftXCoord, middleYCoord), pointSize )
|
||||
<< QRect( QPoint(leftXCoord, bottomYCoord), pointSize )
|
||||
// центр
|
||||
<< QRect( QPoint(centerXCoord, topYCoord), pointSize )
|
||||
<< QRect( QPoint(centerXCoord, middleYCoord), pointSize )
|
||||
<< QRect( QPoint(centerXCoord, bottomYCoord), pointSize )
|
||||
// правая сторона
|
||||
<< QRect( QPoint(rightXCoord, topYCoord), pointSize )
|
||||
<< QRect( QPoint(rightXCoord, middleYCoord), pointSize )
|
||||
<< QRect( QPoint(rightXCoord, bottomYCoord), pointSize );
|
||||
//
|
||||
widgetPainter.drawRects( points );
|
||||
}
|
||||
// ... рисуем пунктирные линии
|
||||
{
|
||||
QPen dashPen(pimpl->croppingRectBorderColor);
|
||||
dashPen.setStyle(Qt::DashLine);
|
||||
widgetPainter.setPen(dashPen);
|
||||
// ... вертикальная
|
||||
widgetPainter.drawLine(
|
||||
QPoint(pimpl->croppingRect.center().x(), pimpl->croppingRect.top()),
|
||||
QPoint(pimpl->croppingRect.center().x(), pimpl->croppingRect.bottom()) );
|
||||
// ... горизонтальная
|
||||
widgetPainter.drawLine(
|
||||
QPoint(pimpl->croppingRect.left(), pimpl->croppingRect.center().y()),
|
||||
QPoint(pimpl->croppingRect.right(), pimpl->croppingRect.center().y()) );
|
||||
}
|
||||
}
|
||||
//
|
||||
widgetPainter.end();
|
||||
}
|
||||
|
||||
void ImageCropper::mousePressEvent(QMouseEvent* _event)
|
||||
{
|
||||
if (_event->button() == Qt::LeftButton) {
|
||||
pimpl->isMousePressed = true;
|
||||
pimpl->startMousePos = _event->pos();
|
||||
pimpl->lastStaticCroppingRect = pimpl->croppingRect;
|
||||
}
|
||||
//
|
||||
updateCursorIcon(_event->pos());
|
||||
}
|
||||
|
||||
void ImageCropper::mouseMoveEvent(QMouseEvent* _event)
|
||||
{
|
||||
QPointF mousePos = _event->pos(); // относительно себя (виджета)
|
||||
//
|
||||
if (!pimpl->isMousePressed) {
|
||||
// Обработка обычного состояния, т.е. не изменяется размер
|
||||
// области обрезки, и она не перемещается по виджету
|
||||
pimpl->cursorPosition = cursorPosition(pimpl->croppingRect, mousePos);
|
||||
updateCursorIcon(mousePos);
|
||||
} else if (pimpl->cursorPosition != CursorPositionUndefined) {
|
||||
// Обработка действий над областью обрезки
|
||||
// ... определим смещение курсора мышки
|
||||
QPointF mouseDelta;
|
||||
mouseDelta.setX( mousePos.x() - pimpl->startMousePos.x() );
|
||||
mouseDelta.setY( mousePos.y() - pimpl->startMousePos.y() );
|
||||
//
|
||||
if (pimpl->cursorPosition != CursorPositionMiddle) {
|
||||
// ... изменяем размер области обрезки
|
||||
QRectF newGeometry =
|
||||
calculateGeometry(
|
||||
pimpl->lastStaticCroppingRect,
|
||||
pimpl->cursorPosition,
|
||||
mouseDelta);
|
||||
// ... пользователь пытается вывернуть область обрезки наизнанку
|
||||
if (!newGeometry.isNull()) {
|
||||
pimpl->croppingRect = newGeometry;
|
||||
}
|
||||
} else {
|
||||
// ... перемещаем область обрезки
|
||||
pimpl->croppingRect.moveTo( pimpl->lastStaticCroppingRect.topLeft() + mouseDelta );
|
||||
}
|
||||
// Перерисуем виджет
|
||||
update();
|
||||
}
|
||||
}
|
||||
|
||||
void ImageCropper::mouseReleaseEvent(QMouseEvent* _event)
|
||||
{
|
||||
pimpl->isMousePressed = false;
|
||||
updateCursorIcon(_event->pos());
|
||||
}
|
||||
|
||||
// ********
|
||||
// Private section
|
||||
|
||||
namespace {
|
||||
// Находится ли точка рядом с координатой стороны
|
||||
static bool isPointNearSide (const int _sideCoordinate, const int _pointCoordinate)
|
||||
{
|
||||
static const int indent = 10;
|
||||
return (_sideCoordinate - indent) < _pointCoordinate && _pointCoordinate < (_sideCoordinate + indent);
|
||||
}
|
||||
}
|
||||
|
||||
CursorPosition ImageCropper::cursorPosition(const QRectF& _cropRect, const QPointF& _mousePosition)
|
||||
{
|
||||
CursorPosition cursorPosition = CursorPositionUndefined;
|
||||
//
|
||||
if ( _cropRect.contains( _mousePosition ) ) {
|
||||
// Двухстороннее направление
|
||||
if (isPointNearSide(_cropRect.top(), _mousePosition.y()) &&
|
||||
isPointNearSide(_cropRect.left(), _mousePosition.x())) {
|
||||
cursorPosition = CursorPositionTopLeft;
|
||||
} else if (isPointNearSide(_cropRect.bottom(), _mousePosition.y()) &&
|
||||
isPointNearSide(_cropRect.left(), _mousePosition.x())) {
|
||||
cursorPosition = CursorPositionBottomLeft;
|
||||
} else if (isPointNearSide(_cropRect.top(), _mousePosition.y()) &&
|
||||
isPointNearSide(_cropRect.right(), _mousePosition.x())) {
|
||||
cursorPosition = CursorPositionTopRight;
|
||||
} else if (isPointNearSide(_cropRect.bottom(), _mousePosition.y()) &&
|
||||
isPointNearSide(_cropRect.right(), _mousePosition.x())) {
|
||||
cursorPosition = CursorPositionBottomRight;
|
||||
// Одностороннее направление
|
||||
} else if (isPointNearSide(_cropRect.left(), _mousePosition.x())) {
|
||||
cursorPosition = CursorPositionLeft;
|
||||
} else if (isPointNearSide(_cropRect.right(), _mousePosition.x())) {
|
||||
cursorPosition = CursorPositionRight;
|
||||
} else if (isPointNearSide(_cropRect.top(), _mousePosition.y())) {
|
||||
cursorPosition = CursorPositionTop;
|
||||
} else if (isPointNearSide(_cropRect.bottom(), _mousePosition.y())) {
|
||||
cursorPosition = CursorPositionBottom;
|
||||
// Без направления
|
||||
} else {
|
||||
cursorPosition = CursorPositionMiddle;
|
||||
}
|
||||
}
|
||||
//
|
||||
return cursorPosition;
|
||||
}
|
||||
|
||||
void ImageCropper::updateCursorIcon(const QPointF& _mousePosition)
|
||||
{
|
||||
QCursor cursorIcon;
|
||||
//
|
||||
switch (cursorPosition(pimpl->croppingRect, _mousePosition))
|
||||
{
|
||||
case CursorPositionTopRight:
|
||||
case CursorPositionBottomLeft:
|
||||
cursorIcon = QCursor(Qt::SizeBDiagCursor);
|
||||
break;
|
||||
case CursorPositionTopLeft:
|
||||
case CursorPositionBottomRight:
|
||||
cursorIcon = QCursor(Qt::SizeFDiagCursor);
|
||||
break;
|
||||
case CursorPositionTop:
|
||||
case CursorPositionBottom:
|
||||
cursorIcon = QCursor(Qt::SizeVerCursor);
|
||||
break;
|
||||
case CursorPositionLeft:
|
||||
case CursorPositionRight:
|
||||
cursorIcon = QCursor(Qt::SizeHorCursor);
|
||||
break;
|
||||
case CursorPositionMiddle:
|
||||
cursorIcon = pimpl->isMousePressed ?
|
||||
QCursor(Qt::ClosedHandCursor) :
|
||||
QCursor(Qt::OpenHandCursor);
|
||||
break;
|
||||
case CursorPositionUndefined:
|
||||
default:
|
||||
cursorIcon = QCursor(Qt::ArrowCursor);
|
||||
break;
|
||||
}
|
||||
//
|
||||
this->setCursor(cursorIcon);
|
||||
}
|
||||
|
||||
const QRectF ImageCropper::calculateGeometry(
|
||||
const QRectF& _sourceGeometry,
|
||||
const CursorPosition _cursorPosition,
|
||||
const QPointF& _mouseDelta
|
||||
)
|
||||
{
|
||||
QRectF resultGeometry;
|
||||
//
|
||||
if ( pimpl->isProportionFixed ) {
|
||||
resultGeometry =
|
||||
calculateGeometryWithFixedProportions(
|
||||
_sourceGeometry, _cursorPosition, _mouseDelta, pimpl->deltas);
|
||||
} else {
|
||||
resultGeometry =
|
||||
calculateGeometryWithCustomProportions(
|
||||
_sourceGeometry, _cursorPosition, _mouseDelta);
|
||||
}
|
||||
// Если пользователь пытается вывернуть область обрезки наизнанку,
|
||||
// возвращаем null-прямоугольник
|
||||
if ((resultGeometry.left() >= resultGeometry.right()) ||
|
||||
(resultGeometry.top() >= resultGeometry.bottom())) {
|
||||
resultGeometry = QRect();
|
||||
}
|
||||
//
|
||||
return resultGeometry;
|
||||
}
|
||||
|
||||
const QRectF ImageCropper::calculateGeometryWithCustomProportions(
|
||||
const QRectF& _sourceGeometry,
|
||||
const CursorPosition _cursorPosition,
|
||||
const QPointF& _mouseDelta
|
||||
)
|
||||
{
|
||||
QRectF resultGeometry = _sourceGeometry;
|
||||
//
|
||||
switch ( _cursorPosition )
|
||||
{
|
||||
case CursorPositionTopLeft:
|
||||
resultGeometry.setLeft( _sourceGeometry.left() + _mouseDelta.x() );
|
||||
resultGeometry.setTop ( _sourceGeometry.top() + _mouseDelta.y() );
|
||||
break;
|
||||
case CursorPositionTopRight:
|
||||
resultGeometry.setTop ( _sourceGeometry.top() + _mouseDelta.y() );
|
||||
resultGeometry.setRight( _sourceGeometry.right() + _mouseDelta.x() );
|
||||
break;
|
||||
case CursorPositionBottomLeft:
|
||||
resultGeometry.setBottom( _sourceGeometry.bottom() + _mouseDelta.y() );
|
||||
resultGeometry.setLeft ( _sourceGeometry.left() + _mouseDelta.x() );
|
||||
break;
|
||||
case CursorPositionBottomRight:
|
||||
resultGeometry.setBottom( _sourceGeometry.bottom() + _mouseDelta.y() );
|
||||
resultGeometry.setRight ( _sourceGeometry.right() + _mouseDelta.x() );
|
||||
break;
|
||||
case CursorPositionTop:
|
||||
resultGeometry.setTop( _sourceGeometry.top() + _mouseDelta.y() );
|
||||
break;
|
||||
case CursorPositionBottom:
|
||||
resultGeometry.setBottom( _sourceGeometry.bottom() + _mouseDelta.y() );
|
||||
break;
|
||||
case CursorPositionLeft:
|
||||
resultGeometry.setLeft( _sourceGeometry.left() + _mouseDelta.x() );
|
||||
break;
|
||||
case CursorPositionRight:
|
||||
resultGeometry.setRight( _sourceGeometry.right() + _mouseDelta.x() );
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
//
|
||||
return resultGeometry;
|
||||
}
|
||||
|
||||
const QRectF ImageCropper::calculateGeometryWithFixedProportions(
|
||||
const QRectF& _sourceGeometry,
|
||||
const CursorPosition _cursorPosition,
|
||||
const QPointF& _mouseDelta,
|
||||
const QSizeF& _deltas
|
||||
)
|
||||
{
|
||||
QRectF resultGeometry = _sourceGeometry;
|
||||
//
|
||||
switch (_cursorPosition)
|
||||
{
|
||||
case CursorPositionLeft:
|
||||
resultGeometry.setTop(_sourceGeometry.top() + _mouseDelta.x() * _deltas.height());
|
||||
resultGeometry.setLeft(_sourceGeometry.left() + _mouseDelta.x());
|
||||
break;
|
||||
case CursorPositionRight:
|
||||
resultGeometry.setTop(_sourceGeometry.top() - _mouseDelta.x() * _deltas.height());
|
||||
resultGeometry.setRight(_sourceGeometry.right() + _mouseDelta.x());
|
||||
break;
|
||||
case CursorPositionTop:
|
||||
resultGeometry.setTop(_sourceGeometry.top() + _mouseDelta.y());
|
||||
resultGeometry.setRight(_sourceGeometry.right() - _mouseDelta.y() * _deltas.width());
|
||||
break;
|
||||
case CursorPositionBottom:
|
||||
resultGeometry.setBottom(_sourceGeometry.bottom() + _mouseDelta.y());
|
||||
resultGeometry.setRight(_sourceGeometry.right() + _mouseDelta.y() * _deltas.width());
|
||||
break;
|
||||
case CursorPositionTopLeft:
|
||||
if ((_mouseDelta.x() * _deltas.height()) < (_mouseDelta.y())) {
|
||||
resultGeometry.setTop(_sourceGeometry.top() + _mouseDelta.x() * _deltas.height());
|
||||
resultGeometry.setLeft(_sourceGeometry.left() + _mouseDelta.x());
|
||||
} else {
|
||||
resultGeometry.setTop(_sourceGeometry.top() + _mouseDelta.y());
|
||||
resultGeometry.setLeft(_sourceGeometry.left() + _mouseDelta.y() * _deltas.width());
|
||||
}
|
||||
break;
|
||||
case CursorPositionTopRight:
|
||||
if ((_mouseDelta.x() * _deltas.height() * -1) < (_mouseDelta.y())) {
|
||||
resultGeometry.setTop(_sourceGeometry.top() - _mouseDelta.x() * _deltas.height());
|
||||
resultGeometry.setRight(_sourceGeometry.right() + _mouseDelta.x() );
|
||||
} else {
|
||||
resultGeometry.setTop(_sourceGeometry.top() + _mouseDelta.y());
|
||||
resultGeometry.setRight(_sourceGeometry.right() - _mouseDelta.y() * _deltas.width());
|
||||
}
|
||||
break;
|
||||
case CursorPositionBottomLeft:
|
||||
if ((_mouseDelta.x() * _deltas.height()) < (_mouseDelta.y() * -1)) {
|
||||
resultGeometry.setBottom(_sourceGeometry.bottom() - _mouseDelta.x() * _deltas.height());
|
||||
resultGeometry.setLeft(_sourceGeometry.left() + _mouseDelta.x());
|
||||
} else {
|
||||
resultGeometry.setBottom(_sourceGeometry.bottom() + _mouseDelta.y());
|
||||
resultGeometry.setLeft(_sourceGeometry.left() - _mouseDelta.y() * _deltas.width());
|
||||
}
|
||||
break;
|
||||
case CursorPositionBottomRight:
|
||||
if ((_mouseDelta.x() * _deltas.height()) > (_mouseDelta.y())) {
|
||||
resultGeometry.setBottom(_sourceGeometry.bottom() + _mouseDelta.x() * _deltas.height());
|
||||
resultGeometry.setRight(_sourceGeometry.right() + _mouseDelta.x());
|
||||
} else {
|
||||
resultGeometry.setBottom(_sourceGeometry.bottom() + _mouseDelta.y());
|
||||
resultGeometry.setRight(_sourceGeometry.right() + _mouseDelta.y() * _deltas.width());
|
||||
}
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
//
|
||||
return resultGeometry;
|
||||
}
|
||||
|
||||
103
src/anpro/imagecropper.h
Normal file
103
src/anpro/imagecropper.h
Normal file
|
|
@ -0,0 +1,103 @@
|
|||
/*****************************************************************************
|
||||
* ImageCropper Qt Widget for cropping images
|
||||
* Copyright (C) 2013 Dimka Novikov, to@dimkanovikov.pro
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 3 of the License, or any later version.
|
||||
*
|
||||
* This library is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public License
|
||||
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*****************************************************************************/
|
||||
|
||||
#ifndef IMAGECROPPER_H
|
||||
#define IMAGECROPPER_H
|
||||
|
||||
#include "imagecropper_p.h"
|
||||
#include "imagecropper_e.h"
|
||||
|
||||
#include <QWidget>
|
||||
|
||||
class ImageCropper : public QWidget
|
||||
{
|
||||
Q_OBJECT
|
||||
|
||||
public:
|
||||
ImageCropper(QWidget *parent = 0);
|
||||
~ImageCropper();
|
||||
|
||||
public slots:
|
||||
// Установить изображение для обрезки
|
||||
void setImage(const QPixmap& _image);
|
||||
// Установить цвет фона виджета обрезки
|
||||
void setBackgroundColor(const QColor& _backgroundColor);
|
||||
// Установить цвет рамки области обрезки
|
||||
void setCroppingRectBorderColor(const QColor& _borderColor);
|
||||
// Установить пропорции области выделения
|
||||
void setProportion(const QSizeF& _proportion);
|
||||
// Использовать фиксированные пропорции области виделения
|
||||
void setProportionFixed(const bool _isFixed);
|
||||
|
||||
public:
|
||||
// Обрезать изображение
|
||||
const QPixmap cropImage();
|
||||
|
||||
protected:
|
||||
virtual void paintEvent(QPaintEvent* _event);
|
||||
virtual void mousePressEvent(QMouseEvent* _event);
|
||||
virtual void mouseMoveEvent(QMouseEvent* _event);
|
||||
virtual void mouseReleaseEvent(QMouseEvent* _event);
|
||||
|
||||
private:
|
||||
// Определение местоположения курсора над виджетом
|
||||
CursorPosition cursorPosition(const QRectF& _cropRect, const QPointF& _mousePosition);
|
||||
// Обновить иконку курсора соответствующую местоположению мыши
|
||||
void updateCursorIcon(const QPointF& _mousePosition);
|
||||
|
||||
// Получить размер виджета после его изменения мышью
|
||||
// --------
|
||||
// Контракты:
|
||||
// 1. Метод должен вызываться, только при зажатой кнопке мыши
|
||||
// (т.е. при перемещении или изменении размера виджета)
|
||||
// --------
|
||||
// В случае неудачи возвращает null-прямоугольник
|
||||
const QRectF calculateGeometry(
|
||||
const QRectF& _sourceGeometry,
|
||||
const CursorPosition _cursorPosition,
|
||||
const QPointF& _mouseDelta
|
||||
);
|
||||
// Получить размер виджета после его изменения мышью
|
||||
// Метод изменяет виджет не сохраняя начальных пропорций сторон
|
||||
// ------
|
||||
// Контракты:
|
||||
// 1. Метод должен вызываться, только при зажатой кнопке мыши
|
||||
// (т.е. при перемещении или изменении размера виджета)
|
||||
const QRectF calculateGeometryWithCustomProportions(
|
||||
const QRectF& _sourceGeometry,
|
||||
const CursorPosition _cursorPosition,
|
||||
const QPointF& _mouseDelta
|
||||
);
|
||||
// Получить размер виджета после его изменения мышью
|
||||
// Метод изменяет виджет сохраняя начальные пропорции сторон
|
||||
// ------
|
||||
// Контракты:
|
||||
// 1. Метод должен вызываться, только при зажатой кнопке мыши
|
||||
// (т.е. при перемещении или изменении размера виджета)
|
||||
const QRectF calculateGeometryWithFixedProportions(const QRectF &_sourceGeometry,
|
||||
const CursorPosition _cursorPosition,
|
||||
const QPointF &_mouseDelta,
|
||||
const QSizeF &_deltas
|
||||
);
|
||||
|
||||
private:
|
||||
// Private data implementation
|
||||
ImageCropperPrivate* pimpl;
|
||||
};
|
||||
|
||||
#endif // IMAGECROPPER_H
|
||||
36
src/anpro/imagecropper_e.h
Normal file
36
src/anpro/imagecropper_e.h
Normal file
|
|
@ -0,0 +1,36 @@
|
|||
/*****************************************************************************
|
||||
* ImageCropper Qt Widget for cropping images
|
||||
* Copyright (C) 2013 Dimka Novikov, to@dimkanovikov.pro
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 3 of the License, or any later version.
|
||||
*
|
||||
* This library is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public License
|
||||
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*****************************************************************************/
|
||||
|
||||
#ifndef IMAGECROPPER_E_H
|
||||
#define IMAGECROPPER_E_H
|
||||
|
||||
enum CursorPosition
|
||||
{
|
||||
CursorPositionUndefined,
|
||||
CursorPositionMiddle,
|
||||
CursorPositionTop,
|
||||
CursorPositionBottom,
|
||||
CursorPositionLeft,
|
||||
CursorPositionRight,
|
||||
CursorPositionTopLeft,
|
||||
CursorPositionTopRight,
|
||||
CursorPositionBottomLeft,
|
||||
CursorPositionBottomRight
|
||||
};
|
||||
|
||||
#endif // IMAGECROPPER_E_H
|
||||
76
src/anpro/imagecropper_p.h
Normal file
76
src/anpro/imagecropper_p.h
Normal file
|
|
@ -0,0 +1,76 @@
|
|||
/*****************************************************************************
|
||||
* ImageCropper Qt Widget for cropping images
|
||||
* Copyright (C) 2013 Dimka Novikov, to@dimkanovikov.pro
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 3 of the License, or any later version.
|
||||
*
|
||||
* This library is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public License
|
||||
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*****************************************************************************/
|
||||
|
||||
#ifndef IMAGECROPPER_P_H
|
||||
#define IMAGECROPPER_P_H
|
||||
|
||||
#include "imagecropper_e.h"
|
||||
|
||||
#include <QtCore/QRect>
|
||||
#include <QtGui/QPixmap>
|
||||
#include <QtGui/QColor>
|
||||
|
||||
namespace {
|
||||
const QRect INIT_CROPPING_RECT = QRect();
|
||||
const QSizeF INIT_PROPORTION = QSizeF(1.0, 1.0);
|
||||
}
|
||||
|
||||
class ImageCropperPrivate {
|
||||
public:
|
||||
ImageCropperPrivate() :
|
||||
imageForCropping(QPixmap()),
|
||||
croppingRect(INIT_CROPPING_RECT),
|
||||
lastStaticCroppingRect(QRect()),
|
||||
cursorPosition(CursorPositionUndefined),
|
||||
isMousePressed(false),
|
||||
isProportionFixed(false),
|
||||
startMousePos(QPoint()),
|
||||
proportion(INIT_PROPORTION),
|
||||
deltas(INIT_PROPORTION),
|
||||
backgroundColor(Qt::black),
|
||||
croppingRectBorderColor(Qt::white)
|
||||
{}
|
||||
|
||||
public:
|
||||
// Изображение для обрезки
|
||||
QPixmap imageForCropping;
|
||||
// Область обрезки
|
||||
QRectF croppingRect;
|
||||
// Последняя фиксированная область обрезки
|
||||
QRectF lastStaticCroppingRect;
|
||||
// Позиция курсора относительно области обрезки
|
||||
CursorPosition cursorPosition;
|
||||
// Зажата ли левая кнопка мыши
|
||||
bool isMousePressed;
|
||||
// Фиксировать пропорции области обрезки
|
||||
bool isProportionFixed;
|
||||
// Начальная позиция курсора при изменении размера области обрезки
|
||||
QPointF startMousePos;
|
||||
// Пропорции
|
||||
QSizeF proportion;
|
||||
// Приращения
|
||||
// width - приращение по x
|
||||
// height - приращение по y
|
||||
QSizeF deltas;
|
||||
// Цвет заливки фона под изображением
|
||||
QColor backgroundColor;
|
||||
// Цвет рамки области обрезки
|
||||
QColor croppingRectBorderColor;
|
||||
};
|
||||
|
||||
#endif // IMAGECROPPER_P_H
|
||||
Loading…
Add table
Add a link
Reference in a new issue