D:/Timo/Visualisierung/LU/Aufgabe1/src/GLProgramm.cpp

Go to the documentation of this file.

#include "GLProgramm.h"

#include <QFile>
#include <QDebug>

GLProgramm::GLProgramm() : vertexShader(GL_VERTEX_SHADER), fragmentShader(GL_FRAGMENT_SHADER)
{
        programm = 0;
}

GLProgramm::~GLProgramm()
{
        free();
}

void GLProgramm::load(QString &vertexShaderName, QString &fragmentShaderName)
{
        vertexShader.load(vertexShaderName);
        fragmentShader.load(fragmentShaderName);
}

bool GLProgramm::link()
{
        GLenum glError;
        GLint glParam;
        bool changed, ret = false;

        if(fragmentShader.compile() && vertexShader.compile())
        {
                ret = true;

                if(programm == 0)
                {
                        programm = glCreateProgram();
                        glAttachShader(programm, vertexShader.shader);
                        glAttachShader(programm, fragmentShader.shader);
                }

                do {
                        glLinkProgram(programm);

                        changed = false;
                        glGetProgramiv(programm, GL_LINK_STATUS, &glParam);
                        if(glParam == GL_FALSE)
                        {
                                {
                                        char buf[1024];
                                        glGetProgramInfoLog(programm, sizeof(buf), NULL, buf);
                                        qDebug() << "info: " << buf;
                                }
                                fragmentShader.compile(&changed);

                                qDebug() << "link programm failed | changed: " << changed;
                        }

                        glError = glGetError();
                        if(glError != GL_NO_ERROR)
                        {
                                qDebug() << "link programm error: /" << programm << "/ " << (char*)gluErrorString(glError);
                        }
                } while(glError == GL_NO_ERROR && changed);

                if(glParam == GL_FALSE || glError != GL_NO_ERROR)
                {
                        ret = false;
                }

                if(!ret)
                {
                        char buf[1024];
                        glGetProgramInfoLog(programm, sizeof(buf), NULL, buf);
                        qDebug() << "info: " << buf;
                }
        }

        return ret;
}

void GLProgramm::free()
{
        if(programm != 0)
        {
                GLenum glError;

                glDeleteProgram(programm);
                programm = 0;

                glError = glGetError();
                if(glError != GL_NO_ERROR)
                {
                        qDebug() << "free Programm error: " << (char*)gluErrorString(glError);
                }
        }
}

---