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import glfw
from OpenGL.GL import *
import numpy as np
import cv2
video_path = "/Users/xclin/Desktop/1.mp4"
# 顶点着色器代码
vertex_shader_source = """
#version 330 core
layout (location = 0) in vec3 aPos;
out vec2 TexCoord; // 添加纹理坐标输出
void main()
{
gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);
TexCoord = (aPos.xy + 1.0) / 2.0; // 计算纹理坐标
}
"""
# 片段着色器代码
fragment_shader_source = """
#version 330 core
in vec2 TexCoord; // 接收纹理坐标
out vec4 FragColor;
uniform sampler2D textureSampler; // 纹理采样器
void main()
{
// 从纹理中采样颜色
FragColor = texture(textureSampler, TexCoord);
}
"""
def main():
# 初始化glfw
if not glfw.init():
return
# 设置OpenGL版本号
glfw.window_hint(glfw.OPENGL_PROFILE, glfw.OPENGL_CORE_PROFILE)
glfw.window_hint(glfw.OPENGL_FORWARD_COMPAT, True)
glfw.window_hint(glfw.CONTEXT_VERSION_MAJOR, 3)
glfw.window_hint(glfw.CONTEXT_VERSION_MINOR, 3)
# 创建窗口
window = glfw.create_window(800, 600, "OpenGL + OpenCV Example", None, None)
if not window:
glfw.terminate()
return
# 设置当前窗口上下文
glfw.make_context_current(window)
# 编译顶点着色器
vertex_shader = glCreateShader(GL_VERTEX_SHADER)
glShaderSource(vertex_shader, vertex_shader_source)
glCompileShader(vertex_shader)
# 编译片段着色器
fragment_shader = glCreateShader(GL_FRAGMENT_SHADER)
glShaderSource(fragment_shader, fragment_shader_source)
glCompileShader(fragment_shader)
# 创建着色器程序
shader_program = glCreateProgram()
glAttachShader(shader_program, vertex_shader)
glAttachShader(shader_program, fragment_shader)
glLinkProgram(shader_program)
glUseProgram(shader_program)
# 顶点数据
vertices = [-0.5, -0.5, 0.0, # 左下角
0.5, -0.5, 0.0, # 右下角
0.0, 0.5, 0.0] # 顶部
vertices = np.array(vertices, dtype=np.float32)
# 创建顶点缓冲对象
VBO = glGenBuffers(1)
glBindBuffer(GL_ARRAY_BUFFER, VBO)
glBufferData(GL_ARRAY_BUFFER, vertices, GL_STATIC_DRAW)
# 创建顶点数组对象
VAO = glGenVertexArrays(1)
glBindVertexArray(VAO)
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(GLfloat), None)
glEnableVertexAttribArray(0)
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(GLfloat), ctypes.c_void_p(3 * sizeof(GLfloat)))
glEnableVertexAttribArray(1)
# 打开摄像头
cap = cv2.VideoCapture(video_path)
width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))
height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
# 创建纹理对象
gl_texture = glGenTextures(1)
glBindTexture(GL_TEXTURE_2D, gl_texture)
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_BGR, GL_UNSIGNED_BYTE, None)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR)
# glEnable(GL_BLEND)
# glEnable(GL_DEPTH_TEST)
while not glfw.window_should_close(window):
glClear(GL_COLOR_BUFFER_BIT)
# 使用着色器程序
glUseProgram(shader_program)
# 绑定顶点数组对象
glBindVertexArray(VAO)
# 绘制三角形
glDrawArrays(GL_TRIANGLES, 0, 3)
# 读取摄像头帧
ret, frame = cap.read()
# 将OpenCV图像数据传递到OpenGL纹理
glBindTexture(GL_TEXTURE_2D, gl_texture)
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, GL_BGR, GL_UNSIGNED_BYTE, frame)
# 交换缓冲区并轮询事件
glfw.swap_buffers(window)
glfw.poll_events()
# 清理资源
glfw.terminate()
if __name__ == "__main__":
main()
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