创建渲染器时，SDL终止

编程问答 2022-08-15

问题描述

当我运行此代码时：

#include <iostream>
#include <SDL.h>
#include <stdexcept>
#include <GL/gl3w.h>

int main() try {
    if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_TIMER | SDL_INIT_GAMECONTROLLER ) != 0 )
        throw std::runtime_error{ "Could not initialize sdl" };

    SDL_GL_SetAttribute( SDL_GL_CONTEXT_FLAGS,0 );
    SDL_GL_SetAttribute( SDL_GL_CONTEXT_PROFILE_MASK,SDL_GL_CONTEXT_PROFILE_CORE );
    SDL_GL_SetAttribute( SDL_GL_CONTEXT_MAJOR_VERSION,3 );
    SDL_GL_SetAttribute( SDL_GL_CONTEXT_MInor_VERSION,0 );

    // Create window with graphics context
    SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER,1 );
    SDL_GL_SetAttribute( SDL_GL_DEPTH_SIZE,24 );
    SDL_GL_SetAttribute( SDL_GL_STENCIL_SIZE,8 );
    auto window_flags = (SDL_WindowFlags) ( SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI );
    auto window       = SDL_CreateWindow( "window",SDL_WINDOWPOS_CENTERED,1280,720,window_flags );
    auto gl_context   = SDL_GL_CreateContext( window );
    SDL_GL_MakeCurrent( window,gl_context );
    SDL_GL_SetSwapInterval( 1 ); // Enable vsync

    if ( gl3wInit() != 0 )
        throw std::runtime_error{ "Unable to initialize OpenGL loader" };

    auto renderer = SDL_CreateRenderer( window,-1,0 );

    return 0;
}
catch ( std::exception& e ) {
    std::cerr << e.what() << "\n";
    return -1;
}

它产生以下输出：

X Error of Failed request:  GLXBadDrawable
  Major opcode of Failed request:  151 (GLX)
  Minor opcode of Failed request:  5 (X_GLXMakeCurrent)
  Serial number of Failed request:  259
  Current serial number in output stream:  259

Process finished with exit code 1

当我注释掉设置opengl版本的行时，它运行正常。

是什么原因导致此错误？为何SDL_CreateRenderer终止而不返回空指针？

解决方法

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