OpenGL鏈接器錯誤，與未編譯着色器鏈接

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我試圖創建一個只繪製三角形的OpenGL應用程序，但即時獲取鏈接器錯誤：與未編譯着色器鏈接。從調用glLinkProgram：OpenGL鏈接器錯誤，與未編譯着色器鏈接

#include <GL/glew.h> 
#include <GL/glut.h> 
#include <fstream> 
#include <iostream> 
#include <string> 
#include <vector> 
#include <assert.h> 
using namespace std; 

GLuint VBO; 
void draw(); 
void CreateVBO(); 
GLuint MakeShader(const string& shaderFile); 
GLuint CreateProgram(); 
string GetCode(const string& path); 

int main(int argc, char* argv[]) 
{ 
    glutInit(&argc, argv); 
    glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE); 

    glutInitWindowSize(768, 512); 
    glutInitWindowPosition(0, 0); 
    glutCreateWindow("Test"); 

    glutDisplayFunc(draw); 

    glClearColor(0.0f, 0.0f, 0.0f, 0.0f); 

    GLenum var = glewInit(); 
    if(var != GLEW_OK){ 
     cerr << "Couldn't initialize glew" << endl; 
     return -1; 
    } 

    CreateVBO(); 

    glutMainLoop(); 
    return 0; 
} 

void draw(){ 
    glClear(GL_COLOR_BUFFER_BIT); 

    static GLuint program = CreateProgram(); 
    glUseProgram(program); 
    glEnableVertexAttribArray(0); 
    glBindBuffer(GL_ARRAY_BUFFER, VBO); 
    glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 0, 0); 

    glDrawArrays(GL_TRIANGLES, 0, 3); 

    glDisableVertexAttribArray(0); 
    glutSwapBuffers(); 
} 

GLuint CreateProgram(){ 
    GLuint program = glCreateProgram(); 
    vector<GLuint> shaders; 
    shaders.push_back(MakeShader("shade.frag")); 
    shaders.push_back(MakeShader("shader.vert")); 
    for(size_t i = 0; i!= shaders.size(); ++i){ 
     glAttachShader(program, shaders[i]); 
    } 
    glLinkProgram(program); 

    GLint linked; 
    glGetProgramiv(program, GL_LINK_STATUS, &linked); 
    if(linked == GL_FALSE){ 
     GLint infoLogLength; 
     glGetProgramiv(program, GL_INFO_LOG_LENGTH, &infoLogLength); 

     GLchar* strInfoLog = new GLchar[infoLogLength+1]; 
     glGetProgramInfoLog(program, infoLogLength, NULL, strInfoLog); 
     printf("Linker failure: %s \n", strInfoLog); 
     delete strInfoLog; 
    } 
    return program; 
} 

string GetCode(const string &path){ 
    ifstream file(path); 
    string ret = ""; 
    string line; 
    if(file.is_open()){ 
     while(getline(file, line)){ 
      ret += line + '\n'; 
     } 
    } 
    return ret; 
} 

GLuint MakeShader(const string& shaderFile){ 
    string extension = shaderFile.substr(shaderFile.length()-4, 4); 
    GLenum type; 
    string shaderType; 
    if(extension == "vert") 
    { 
     type = GL_VERTEX_SHADER; 
     shaderType = "Vertex"; 
    } 
    else if(extension == "frag") 
    { 
     type = GL_FRAGMENT_SHADER; 
     shaderType = "Fragment"; 
    } 

    const char* code = (GetCode(shaderFile)).c_str(); 
    GLuint shader = glCreateShader(type); 
    glShaderSource(shader, 1, &code, NULL); 

    glCompileShader(shader); 

    GLint status; 
    glGetShaderiv(shader, GL_COMPILE_STATUS, &status); 
    if(status != GLEW_OK){ 
     GLint logSize; 
     glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &logSize); 
     GLchar* errorLog = new GLchar[logSize+1]; 
     glGetShaderInfoLog(shader, logSize, NULL, errorLog); 
     printf("Compile failed in %s shader: %s \n", shaderType.c_str(), errorLog); 
     delete errorLog; 
    } 
    return shader; 
} 

void CreateVBO(){ 
    float Vertices[12]= { 
     0.0f, 0.0f, 0.0f, 1.0f, 
     1.0f, 0.0f, 0.0f, 1.0f, 
     0.0f, 1.0f, 0.0f, 1.0f 
    }; 

    glGenBuffers(1, &VBO); 
    glBindBuffer(GL_ARRAY_BUFFER, VBO); 
    glBufferData(GL_ARRAY_BUFFER, sizeof(Vertices), Vertices, GL_STATIC_DRAW); 
}

對不起，如果我的問題是noobish，但我有點掙扎的OpenGL

來源

2015-11-24 J.Dev

如果您使用的是代碼塊IDE，那麼您可以按照我的[this]（http://stackoverflow.com/questions/22747110/c-graphics-h-lbgi-not-found/31242642#31242642）回答。 – manetsus

你確定你的'glCompileShader'調用成功嗎？無論是否編譯，您總是從'MakeShader'返回着色器名稱。 – n0rd

Im實際上使用QtCreator，並且是我得到的唯一錯誤消息是鏈接器錯誤 –

您不正確檢查着色器編譯成功。您將GL_COMPILE_STATUS與GLEW_OK（這是0並且與OpenGL無關）進行比較，而您應該與GL_TRUE（即1）進行比較。除了向stdout報告失敗之外，代碼也不會做任何事情（即，調用者無法知道它是失敗還是成功）。

來源

2015-11-24 01:14:48 n0rd

OpenGL鏈接器錯誤，與未編譯着色器鏈接

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