C++ 我可以使用qt中的OpenGL功能而不使用任何类型的小部件吗？

我正在尝试使用openGL计算着色器在gpu上计算一些东西。 但我想把这个程序保存在终端中，所以我不想要任何类型的小部件

现在看来，如果没有分段错误，我将无法调用InitializePenglFunctions或任何其他ogl相关函数

标题

#include <QOpenGLShaderProgram>
#include <QOpenGLFunctions_4_5_Core>

class SolverGPU : public QObject,
                  protected QOpenGLFunctions_4_5_Core
{
    Q_OBJECT
public:
    SolverGPU();

private:
    QOpenGLShaderProgram* program;
};

---

我已经尝试过使用QOpenGLFunctions而不是QOpenGLFunctions\u 4\u 5\u Core，但没有成功。

下面的代码适合我。我现在使用的盒子不支持OpenGL4.5，因此“降级”到3.3。原理是一样的

#include <cstdlib>
#include <iostream>
#include <QApplication>
#include <QOffscreenSurface>
#include <QOpenGLContext>
#include <QOpenGLFunctions_3_3_Core>
#include <QOpenGLShader>
#include <QOpenGLShaderProgram>

int main (int argc, char **argv)
{
  try {
    QApplication app(argc, argv);

    QSurfaceFormat format;
    format.setMajorVersion(3);
    format.setMinorVersion(3);
    format.setProfile(QSurfaceFormat::CoreProfile);

    QOpenGLContext gl_ctx;
    gl_ctx.setFormat(format);
    if (!gl_ctx.create())
      throw std::runtime_error("context creation failed");

    QOffscreenSurface surface;
    surface.create();
    gl_ctx.makeCurrent(&surface);

    QOpenGLFunctions_3_3_Core opengl_functions;
    if (!opengl_functions.initializeOpenGLFunctions())
      throw std::runtime_error("initialization failed");

    QOpenGLShader vertex_shader(QOpenGLShader::Vertex);
    if (!vertex_shader.compileSourceCode(
          "#version 330 core\n"
          "\n"
          "void main ()\n"
          "{\n"
          "  gl_Position = vec4(0.0, 0.0, 0.0, 1.0);\n"
          "}\n"
          )) {
      throw std::runtime_error("vertex shader compilaton failed");
    }

    QOpenGLShader fragment_shader(QOpenGLShader::Fragment);
    if (!fragment_shader.compileSourceCode(
          "#version 330 core\n"
          "\n"
          "layout(location = 0) out vec4 colour;\n"
          "\n"
          "void main ()\n"
          "{\n"
          "  colour = vec4(0.0, 0.0, 0.0, 1.0);\n"
          "}\n"
          )) {
      throw std::runtime_error("fragment shader compilaton failed");
    }

    QOpenGLShaderProgram program;
    if (!program.addShader(&vertex_shader))
      throw std::runtime_error("failed to add vertex shader to program");
    if (!program.addShader(&fragment_shader))
      throw std::runtime_error("failed to add fragment shader to program");
    if (!program.link())
      throw std::runtime_error("failed to link failed");
    if (!program.bind())
      throw std::runtime_error("glUseProgram failed");

    app.exec();
  }
  catch (std::exception &ex) {
    std::clog << "\n" << ex.what();
  }
  catch (...) {
    std::clog << "\nunrecognized exception";
  }
  exit(0);
}

---

我只执行了最低限度的测试，但显示的代码创建了一个合适的上下文，初始化了3.30核心函数集，并成功编译和链接了着色器程序。

调用QOpenGLFunctions_4_5_core:：InitializePenglFunctions时，您可能需要一个有效的电流。或者，使用所需规范创建QOpenGLContext并使用.QOpenGLContext:：makeCurrent需要QSurface作为参数。调用QOpenGLContext:：函数需要上下文是最新的。好的，我几乎可以肯定的是，使用Qt包装器是没有办法做到这一点的。谢谢你回答我的第一个问题！是的，就这样！多谢各位

#include <cstdlib>
#include <iostream>
#include <QApplication>
#include <QOffscreenSurface>
#include <QOpenGLContext>
#include <QOpenGLFunctions_3_3_Core>
#include <QOpenGLShader>
#include <QOpenGLShaderProgram>

int main (int argc, char **argv)
{
  try {
    QApplication app(argc, argv);

    QSurfaceFormat format;
    format.setMajorVersion(3);
    format.setMinorVersion(3);
    format.setProfile(QSurfaceFormat::CoreProfile);

    QOpenGLContext gl_ctx;
    gl_ctx.setFormat(format);
    if (!gl_ctx.create())
      throw std::runtime_error("context creation failed");

    QOffscreenSurface surface;
    surface.create();
    gl_ctx.makeCurrent(&surface);

    QOpenGLFunctions_3_3_Core opengl_functions;
    if (!opengl_functions.initializeOpenGLFunctions())
      throw std::runtime_error("initialization failed");

    QOpenGLShader vertex_shader(QOpenGLShader::Vertex);
    if (!vertex_shader.compileSourceCode(
          "#version 330 core\n"
          "\n"
          "void main ()\n"
          "{\n"
          "  gl_Position = vec4(0.0, 0.0, 0.0, 1.0);\n"
          "}\n"
          )) {
      throw std::runtime_error("vertex shader compilaton failed");
    }

    QOpenGLShader fragment_shader(QOpenGLShader::Fragment);
    if (!fragment_shader.compileSourceCode(
          "#version 330 core\n"
          "\n"
          "layout(location = 0) out vec4 colour;\n"
          "\n"
          "void main ()\n"
          "{\n"
          "  colour = vec4(0.0, 0.0, 0.0, 1.0);\n"
          "}\n"
          )) {
      throw std::runtime_error("fragment shader compilaton failed");
    }

    QOpenGLShaderProgram program;
    if (!program.addShader(&vertex_shader))
      throw std::runtime_error("failed to add vertex shader to program");
    if (!program.addShader(&fragment_shader))
      throw std::runtime_error("failed to add fragment shader to program");
    if (!program.link())
      throw std::runtime_error("failed to link failed");
    if (!program.bind())
      throw std::runtime_error("glUseProgram failed");

    app.exec();
  }
  catch (std::exception &ex) {
    std::clog << "\n" << ex.what();
  }
  catch (...) {
    std::clog << "\nunrecognized exception";
  }
  exit(0);
}