C++中修改PyQt对象

.gitignore

@@ -3,6 +3,13 @@ __pycache__/
 *.py[co]
 *$py.class
 
+debug
+release
+.qmake.stash
+Makefile
+Makefile.Debug
+Makefile.Release
+
 Tmp
 Tmp/*
 

Test/C++中修改PyQt对象/Cold/Cold.pro

@@ -0,0 +1,30 @@
+#-------------------------------------------------
+#
+# Project created by QtCreator 2020-03-02T16:57:48
+#
+#-------------------------------------------------
+
+TARGET = Cold
+TEMPLATE = lib
+
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
+SOURCES += \
+        cold.cpp
+
+HEADERS += \
+        cold.h
+
+unix {
+    target.path = /usr/lib
+    INSTALLS += target
+}

Test/C++中修改PyQt对象/Cold/build.bat

@@ -0,0 +1,2 @@
+qmake
+nmake

Test/C++中修改PyQt对象/Cold/cold.cpp

@@ -0,0 +1,19 @@
+#include "cold.h"
+
+void cold(QImage &src, int delta)
+{
+    int rows = src.height();
+    int cols = src.width();
+    for (int i = 0; i < rows; i++)
+    {
+        QRgb *line = (QRgb *)src.scanLine(i);
+        for (int j = 0; j < cols; j++)
+        {
+            int r = qRed(line[j]);
+            int g = qGreen(line[j]);
+            int b = qBlue(line[j]) + delta;
+            b = qBound(0, b, 255);
+            src.setPixel(j, i, qRgb(r, g, b));
+        }
+    }
+}

Test/C++中修改PyQt对象/Cold/cold.h

@@ -0,0 +1,4 @@
+#include <QImage>
+#include <QColor>
+
+extern "C" __declspec(dllexport) void cold(QImage &src, int delta);

Test/C++中修改PyQt对象/Test.py

@@ -0,0 +1,67 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+'''
+Created on 2020年3月2日
+@author: Irony
+@site: https://pyqt.site https://github.com/PyQt5
+@email: 892768447@qq.com
+@file:
+@description: 冷色调
+'''
+
+import sys
+from ctypes import CDLL
+from time import time
+
+# For PyQt5
+try:
+    from PyQt5 import sip
+except:
+    import sip
+from PyQt5.QtCore import Qt
+from PyQt5.QtGui import QImage, QPixmap
+from PyQt5.QtWidgets import QApplication, QWidget, QLabel, QSlider, QVBoxLayout
+
+# For PySide2
+# import shiboken2
+# from PySide2.QtCore import Qt
+# from PySide2.QtGui import QImage, QPixmap
+# from PySide2.QtWidgets import QApplication, QWidget, QLabel, QSlider, QVBoxLayout
+
+
+class Window(QWidget):
+
+    def __init__(self, *args, **kwargs):
+        super(Window, self).__init__(*args, **kwargs)
+        layout = QVBoxLayout(self)
+        self.imgLabel = QLabel(self)
+        self.coldSlider = QSlider(Qt.Horizontal, self)
+        self.coldSlider.valueChanged.connect(self.doChange)
+        self.coldSlider.setRange(0, 255)
+        layout.addWidget(self.imgLabel)
+        layout.addWidget(self.coldSlider)
+
+        # 加载图片
+        self.srcImg = QImage('src.jpg')
+        self.imgLabel.setPixmap(QPixmap.fromImage(self.srcImg).scaledToWidth(800, Qt.SmoothTransformation))
+        # DLL库
+        self.dll = CDLL('Cold.dll')
+        print(self.dll)
+
+    def doChange(self, value):
+        t = time()
+        img = self.srcImg.copy()  # 复制一份
+        # For PyQt5
+        self.dll.cold(sip.unwrapinstance(img), value)
+        # For PySide2
+        # self.dll.cold(shiboken2.getCppPointer(img)[0], value)
+        self.imgLabel.setPixmap(QPixmap.fromImage(img).scaledToWidth(800, Qt.SmoothTransformation))
+        print('use time:', time() - t)
+
+
+if __name__ == "__main__":
+    app = QApplication(sys.argv)
+    view = Window()
+    view.show()
+    sys.exit(app.exec_())