opengl之glsl编译

功能：编译glsl代码

编译：
    GLuint ShaderProgram = glCreateProgram();

    if (ShaderProgram == 0) {
        ULOGE("Error creating shader program");
       // fprintf(stderr, "Error creating shader program\n");
        exit(1);
    }
   // glBindAttribLocation(ShaderProgram, 0, "Position");
    
    string vs, fs;

    if (!ReadFile(pVSFileName, vs)) {
        exit(1);
    };

    if (!ReadFile(pFSFileName, fs)) {
        exit(1);
    };

    AddShader(ShaderProgram, vs.c_str(), GL_VERTEX_SHADER);
    AddShader(ShaderProgram, fs.c_str(), GL_FRAGMENT_SHADER);

    GLint Success = 0;
    GLchar ErrorLog[1024] = { 0 };

    glLinkProgram(ShaderProgram);
    glGetProgramiv(ShaderProgram, GL_LINK_STATUS, &Success);
    if (Success == 0) {
        glGetProgramInfoLog(ShaderProgram, sizeof(ErrorLog), NULL, ErrorLog);

        ULOGE("Error linking shader program ", ErrorLog);
        //fprintf(stderr, "Error linking shader program: '%s'\n", ErrorLog);
        exit(1);
    }

    glValidateProgram(ShaderProgram);
    glGetProgramiv(ShaderProgram, GL_VALIDATE_STATUS, &Success);
    if (!Success) {
        glGetProgramInfoLog(ShaderProgram, sizeof(ErrorLog), NULL, ErrorLog);
        ULOGE("Invalid shader program ", ErrorLog);
        //fprintf(stderr, "Invalid shader program: '%s'\n", ErrorLog);
        exit(1);
    }

    glUseProgram(ShaderProgram);
 

相关函数：

static void AddShader(GLuint ShaderProgram, const char* pShaderText, GLenum ShaderType)
{
    GLuint ShaderObj = glCreateShader(ShaderType);

    if (ShaderObj == 0) {
        ULOGE("Error creating shader type ", ShaderType);

        exit(0);
    }

    const GLchar* p[1];
    p[0] = pShaderText;
    GLint Lengths[1];
    Lengths[0]= strlen(pShaderText);
    glShaderSource(ShaderObj, 1, p, Lengths);
    glCompileShader(ShaderObj);
    GLint success;
    glGetShaderiv(ShaderObj, GL_COMPILE_STATUS, &success);
    if (!success) {
        GLchar InfoLog[1024];
        glGetShaderInfoLog(ShaderObj, 1024, NULL, InfoLog);
        ULOGE("Error compiling shader type ", ShaderType, "log: ", InfoLog);
        
        exit(1);
    }

    glAttachShader(ShaderProgram, ShaderObj);
}

源码位置：../code/05.cpp