314 lines
8.6 KiB
C++
314 lines
8.6 KiB
C++
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// Dolaczamy plik naglowkowy naszej klasy MyWindow
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#include "mywindow.h"
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// Dolaczamy plik naglowkowy zawierajacy definicje GUI
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// Plik ten jest generowany automatycznie
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// z pliku XML "mywindow.ui"
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#include "ui_mywindow.h"
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#include <cmath>
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#include <QColor>
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#include <QDebug>
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#include <QColorDialog>
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#include <iostream>
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#include <float.h> // for float,double macros
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#include <string.h>
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#include <stack>
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#include <vector>
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#define PI 3.1415
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std::vector<float> matrixMul(std::vector<float> p, std::vector<float> m)
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{
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std::vector<float> res(3);
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for(int i = 0; i < 3; i++)
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{
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res.push_back(0);
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for(int j = 0; j < 3; j++)
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{
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res[i] += m[i * 3 + j] * p[j];
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}
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}
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return res;
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}
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std::vector<float> matrixMul3x3(std::vector<float> m1, std::vector<float> m2)
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{
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std::vector<float> res(9, 0);
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for(int i = 0; i < 3; i++)
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{
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for(int j = 0; j < 3; j++)
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{
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for(int k = 0; k < 3; k++)
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{
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res[i * 3 + j] += m1[i * 3 + k] * m2[k * 3 + j];
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}
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}
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}
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return res;
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}
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QColor mul(float v, QColor c){
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int red = (int)(c.red() * v);
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if(red > 255) red = 255;
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int green = (int)(c.green() * v);
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if(green > 255) green = 255;
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int blue = (int)(c.blue() * v);
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if(blue > 255) blue = 255;
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return QColor(red, green, blue);
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}
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QColor add(QColor c1, QColor c2){
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int red = (int)(c1.red() + c2.red());
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if(red > 255) red = 255;
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int green = (int)(c1.green() + c2.green());
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if(green > 255) green = 255;
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int blue = (int)(c1.blue() + c2.blue());
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if(blue > 255) blue = 255;
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return QColor(red, green, blue);
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}
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// Definicja konstruktora, wywolujemy najpierw
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// konstruktor klasy nadrzednej, nastepnie tworzymy
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// obiekt klasy Ui_MyWindow reprezentujacy GUI
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MyWindow::MyWindow(QWidget *parent) :
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QMainWindow(parent),
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ui(new Ui::MyWindow)
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{
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// Wywolujemy funkcje tworzaca elementy GUI
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// Jej definicja znajduje sie w pliku "ui_mywindow.h"
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ui->setupUi(this);
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// Pobieramy wymiary i wspolrzedne lewego gornego naroznika ramki
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// i ustawiamy wartosci odpowiednich pol
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// Uwaga: ramke "rysujFrame" wykorzystujemy tylko do
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// wygodnego ustaiwenia tych wymiarow. Rysunek bedziemy wyswietlac
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// bezposrednio w glownym oknie aplikacji.
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szer = ui->rysujFrame->width();
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wys = ui->rysujFrame->height();
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poczX = ui->rysujFrame->x();
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poczY = ui->rysujFrame->y();
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// Tworzymy obiekt klasy QImage, o odpowiedniej szerokosci
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// i wysokosci. Ustawiamy format bitmapy na 32 bitowe RGB
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// (0xffRRGGBB).
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img = new QImage(szer,wys,QImage::Format_RGB32);
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loaded_img1 = new QImage("/home/davp/umk/2022_2023/GK/QT/alpha-blending/f.png");
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loaded_img2 = new QImage("/home/davp/umk/2022_2023/GK/QT/alpha-blending/f.png");
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int width = loaded_img1->width();
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int height = loaded_img1->height();
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for(int x = 0; x < width; x++)
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for(int y = 0; y < height; y++){
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QColor color = GetPixel(loaded_img1, x, y);
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if((color.red() + color.green() + color.blue()) / 3.0f > 128.0f)
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DrawPixel(loaded_img1, x, y, QColor(255, 255, 255));
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else
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DrawPixel(loaded_img1, x, y, QColor(0, 0, 0));
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}
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UpdateImage();
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update();
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}
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// Definicja destruktora
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MyWindow::~MyWindow()
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{
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delete ui;
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}
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// Funkcja (slot) wywolywana po nacisnieciu przycisku "Wyjscie" (exitButton)
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// Uwaga: polaczenie tej funkcji z sygnalem "clicked"
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// emitowanym przez przycisk jest realizowane
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// za pomoca funkcji QMetaObject::connectSlotsByName(MyWindow)
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// znajdujacej sie w automatycznie generowanym pliku "ui_mywindow.h"
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// Nie musimy wiec sami wywolywac funkcji "connect"
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void MyWindow::on_exitButton_clicked()
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{
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// qApp to globalny wskaznik do obiektu reprezentujacego aplikacje
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// quit() to funkcja (slot) powodujaca zakonczenie aplikacji z kodem 0 (brak bledu)
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qApp->quit();
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}
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void MyWindow::on_erosion_clicked(){
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Erosion(loaded_img1);
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UpdateImage();
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}
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void MyWindow::on_dilation_clicked(){
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Dilation(loaded_img1);
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UpdateImage();
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}
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void MyWindow::on_opening_clicked(){
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Open(loaded_img1);
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UpdateImage();
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}
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void MyWindow::on_closing_clicked(){
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Close(loaded_img1);
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UpdateImage();
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}
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void MyWindow::UpdateImage(){
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for(int x = 0; x < szer; x++)
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for(int y = 0; y < wys; y++){
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float xw = (float) x / (float)szer;
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float yh = (float) y / (float) wys;
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DrawPixel(img, x, y, GetInterpolatedColor(loaded_img1, xw, yh));
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}
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update();
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}
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bool MyWindow::IsLit(QImage* im, int x, int y, int val){
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int width = im->width();
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int height = im->height();
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if(x < 0 || y < 0 || x >= width || y >= height)
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return false;
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QColor pix = GetPixel(im, x, y);
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return pix.red() == val && pix.green() == val && pix.blue() == val;
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}
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void MyWindow::Erosion(QImage* im){
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int width = im->width();
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int height = im->height();
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memcpy(loaded_img2->bits(), loaded_img1->bits(), width * height * 4);
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for(int x = 0; x < width; x++)
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for(int y = 0; y < height; y++){
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bool active = false;
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for (int x2 = x - 1; x2 <= x + 1; x2++)
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for (int y2 = y - 1; y2 <= y + 1; y2++)
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if(IsLit(loaded_img1, x2, y2, 0)){
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DrawPixel(loaded_img2, x, y, QColor(0, 0, 0));
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break;
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}
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}
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memcpy(loaded_img1->bits(), loaded_img2->bits(), width * height * 4);
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}
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void MyWindow::Dilation(QImage* im){
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int width = im->width();
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int height = im->height();
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memcpy(loaded_img2->bits(), loaded_img1->bits(), width * height * 4);
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for(int x = 0; x < width; x++)
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for(int y = 0; y < height; y++){
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bool active = false;
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for (int x2 = x - 1; x2 <= x + 1; x2++)
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for (int y2 = y - 1; y2 <= y + 1; y2++)
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if(IsLit(loaded_img1, x2, y2, 255)){
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DrawPixel(loaded_img2, x, y, QColor(255, 255, 255));
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break;
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}
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}
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memcpy(loaded_img1->bits(), loaded_img2->bits(), width * height * 4);
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}
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void MyWindow::Close(QImage* im){
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Dilation(im);
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Erosion(im);
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}
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void MyWindow::Open(QImage* im){
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Erosion(im);
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Dilation(im);
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}
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QColor MyWindow::GetPixel(QImage* img, int x, int y){
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QColor res;
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int width = img->width();
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int height = img->height();
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if(x >= width || y >= height || x < 0 || y < 0)
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return res;
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unsigned char* ptr = img->bits();
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res.setBlue(ptr[width*4*y + 4*x]);
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res.setGreen(ptr[width*4*y + 4*x + 1]);
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res.setRed(ptr[width*4*y + 4*x + 2]);
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res.setAlpha(ptr[width*4*y + 4*x + 3]);
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return res;
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}
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QColor MyWindow::GetInterpolatedColor(QImage* img, float x, float y){
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float width = img->width();
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float height = img->height();
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float xw = (x * width);
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float yw = (y * height);
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int x_f = (int) (x * width);
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int y_f = (int) (y * height);
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int x_c = ceil(x * width);
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int y_c = ceil(y * height);
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float a = (xw - (float) x_f);
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float b = ((yw) - (float) y_f);
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QColor P1 = GetPixel(img, x_f, y_c);
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QColor P2 = GetPixel(img, x_c, y_c);
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QColor P3 = GetPixel(img, x_c, y_f);
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QColor P4 = GetPixel(img, x_f, y_f);
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QColor v1 = mul(1.0f - a, P1);
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QColor v2 = mul(a, P2);
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QColor v3 = mul(a, P3);
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QColor v4 = mul(1.0f - a, P4);
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QColor top = add(v1, v2);
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QColor bottom = add(v3, v4);
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QColor btop = mul(b, top);
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QColor bbottom = mul(1.0f - b, bottom);
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QColor res = add(btop, bbottom);
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return res;
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}
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// Funkcja "odmalowujaca" komponent
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void MyWindow::paintEvent(QPaintEvent*)
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{
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// Obiekt klasy QPainter pozwala nam rysowac na komponentach
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QPainter p(this);
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UpdateImage();
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// Rysuje obrazek "img" w punkcie (poczX,poczY)
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// (tu bedzie lewy gorny naroznik)
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p.drawImage(poczX,poczY,*img);
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}
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void MyWindow::DrawPixel(QImage* im, int x, int y, QColor color){
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int width = im->width();
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int height = im->height();
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if(x >= width || y >= height || x < 0 || y < 0)
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return;
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unsigned char* ptr = im->bits();
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ptr[width*4*y + 4*x] = color.blue();
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ptr[width*4*y + 4*x + 1] = color.green();
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ptr[width*4*y + 4*x + 2] = color.red();
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ptr[width*4*y + 4*x + 3] = color.alpha();
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}
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void MyWindow::ClearImage(QImage *img){
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unsigned char* empty_val = (unsigned char*)malloc(4);
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empty_val[0] = 0;
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empty_val[1] = 0;
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empty_val[2] = 0;
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empty_val[3] = 255;
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unsigned char* ptr = img->bits();
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for(int i = 0; i < img->width(); i++){
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for(int j = 0; j < img->height(); j++){
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memcpy(ptr + 4 * (i + j * img->width()), empty_val, 4);
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}
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}
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}
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