以下是使用OpenCV读取图片，并使用GLFW加载到纹理渲染，然后将该纹理缩放为原始尺寸的一半并显示的示例代码：
#include <opencv2/opencv.hpp>#include <GLFW/glfw3.h>int main() {// 初始化GLFWif (!glfwInit()) {std::cout << "Failed to initialize GLFW" << std::endl;return -1;}// 创建窗口GLFWwindow* window = glfwCreateWindow(800, 600, "Image Texture", NULL, NULL);if (!window) {std::cout << "Failed to create GLFW window" << std::endl;glfwTerminate();return -1;}glfwMakeContextCurrent(window);// 加载图像并创建纹理cv::Mat image = cv::imread("image.jpg"); // 修改为你想加载的图片路径cv::flip(image, image, 0); // 如果需要翻转图像，请取消注释此行GLuint textureID;glGenTextures(1, &textureID);glBindTexture(GL_TEXTURE_2D, textureID);// 设置纹理参数glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);// 将图像数据上传到纹理对象中glTexImage2D(GL_TEXTURE_2D,0,GL_RGB,image.cols,image.rows,0,GL_BGR,GL_UNSIGNED_BYTE,image.data);// 主循环while (!glfwWindowShouldClose(window)) {glClear(GL_COLOR_BUFFER_BIT);// 绑定纹理并渲染glBindTexture(GL_TEXTURE_2D, textureID);glBegin(GL_QUADS);glTexCoord2f(0.0f, 0.0f); glVertex2f(-1.0f, -1.0f);glTexCoord2f(1.0f, 0.0f); glVertex2f(1.0f, -1.0f);glTexCoord2f(1.0f, 1.0f); glVertex2f(1.0f, 1.0f);glTexCoord2f(0.0f, 1.0f); glVertex2d(-1.0, 1.0);glEnd();glfwSwapBuffers(window);glfwPollEvents();}// 清理资源glfwDestroyWindow(window);glfwTerminate();return 0;}
请确保已经安装了OpenCV和GLFW库，并将图片路径修改为你想加载的图像路径。运行代码后，会创建一个窗口显示缩放后的图像纹理。
内容由零声教学AI助手提供，问题来源于学员提问
