void MyGLWidget::carregaShaders()
{
// Creem els shaders per al fragment shader i el vertex shader
QGLShader fs (QGLShader::Fragment, this);
QGLShader vs (QGLShader::Vertex, this);
// Carreguem el codi dels fitxers i els compilem
fs.compileSourceFile("shaders/fragshad.frag");
vs.compileSourceFile("shaders/vertshad.vert");
// Creem el program
program = new QGLShaderProgram(this);
// Li afegim els shaders corresponents
program->addShader(&fs);
program->addShader(&vs);
// Linkem el program
program->link();
// Indiquem que aquest és el program que volem usar
program->bind();
// Obtenim identificador per a l'atribut “vertex” del vertex shader
vertexLoc = glGetAttribLocation (program->programId(), "vertex");
// Obtenim identificador per a l'atribut “color” del vertex shader
colorLoc = glGetAttribLocation (program->programId(), "color");
// Uniform locations
transLoc = glGetUniformLocation(program->programId(), "TG");
projLoc = glGetUniformLocation(program->programId(), "proj");
}
void MyGLWidget::initializeGL ()
{
// glew és necessari per cridar funcions de les darreres versions d'OpenGL
glewExperimental = GL_TRUE;
glewInit();
glGetError(); // Reinicia la variable d'error d'OpenGL
glClearColor (0.5, 0.7, 1.0, 1.0); // defineix color de fons (d'esborrat)
//afegim shaders
QGLShader fs (QGLShader::Fragment,this);
fs.compileSourceFile ("./fragshad.frag");
QGLShader vs (QGLShader::Vertex,this);
vs.compileSourceFile ("./vertshad.vert");
QGLShaderProgram program(this);
program.addShader(&fs);
program.addShader(&vs);
program.link();
program.bind();
//creem els buffers
createBuffers();
}
PlainShader::PlainShader()
{
QGLShader* vert = new QGLShader(QGLShader::Vertex);
QGLShader* frag = new QGLShader(QGLShader::Fragment);
vert->compileSourceFile("./shaders/plain.vert");
frag->compileSourceFile("./shaders/plain.frag");
m_shaderProg = new QGLShaderProgram();
m_shaderProg->addShader(vert);
m_shaderProg->addShader(frag);
m_shaderProg->link();
m_shaderFogFlag = m_shaderProg->uniformLocation("fog_enabled");
m_shaderProg->setUniformValue(m_shaderFogFlag, false);
}
void GLWidget::loadShaders(QGLShaderProgram* program, QString vShaderFileName, QString fShaderFileName)
{
QGLShader* vertexShader = NULL;
QGLShader* fragmentShader = NULL;
QFileInfo vsh(vShaderFileName);
if(vsh.exists()) {
vertexShader = new QGLShader(QGLShader::Vertex);
if(vertexShader->compileSourceFile(vShaderFileName)) {
program->addShader(vertexShader);
qDebug() << "Vertex shader compiled successfully.";
}
else {
qWarning() << "Vertex Shader Error" << vertexShader->log();
}
}
else {
qWarning() << "Vertex Shader source file " << fShaderFileName << " not found.";
}
QFileInfo fsh(fShaderFileName);
if(fsh.exists()) {
fragmentShader = new QGLShader(QGLShader::Fragment);
if(fragmentShader->compileSourceFile(fShaderFileName)) {
program->addShader(fragmentShader);
qDebug() << "Fragment shader compiled successfully.";
}
else {
qWarning() << "Fragment Shader Error" << fragmentShader->log();
}
}
else {
qWarning() << "Fragment Shader source file " << fShaderFileName << " not found.";
}
if(!program->link()){
qWarning() << "Shader Program Linker Error" << program->log();
}
}
void GLWidget::initializeGL()
{
initializeGLFunctions();
makeObject();
// opengl settings
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
glEnable(GL_TEXTURE_2D);
// transform matrices
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(-1.0, +1.0, +1.0, -1.0, 4.0, 15.0);
glMatrixMode(GL_MODELVIEW);
// shaders
QGLShader *vshader = new QGLShader(QGLShader::Vertex, this);
vshader->compileSourceFile(":/glsl/passThru_vert.glsl");
QGLShader *fshader = new QGLShader(QGLShader::Fragment, this);
fshader->compileSourceFile(":/glsl/uvMap_frag.glsl");
m_uvMapProgram = new QGLShaderProgram(this);
m_uvMapProgram->addShader(vshader);
m_uvMapProgram->addShader(fshader);
m_uvMapProgram->link();
fshader = new QGLShader(QGLShader::Fragment, this);
fshader->compileSourceFile(":/glsl/transparencyGrid_frag.glsl");
m_gridProgram = new QGLShaderProgram(this);
m_gridProgram->addShader(vshader);
m_gridProgram->addShader(fshader);
m_gridProgram->link();
emit initialized();
}
QGLShader *SceneParser::loadShader(KeyValues *data)
{
const char *type = data->getString("type");
if(!type) {
fprintf(stderr, "Key 'type' not found on Shader\n");
return NULL;
}
const char *file = data->getString("file");
if(!file) {
fprintf(stderr, "Key 'file' not found on Shader\n");
return NULL;
}
char *filename = resolvePath(file);
QGLShader::ShaderType shaderType;
if(strcmp(type, "vertex") == 0) {
shaderType = QGLShader::Vertex;
}
else if(strcmp(type, "fragment") == 0) {
shaderType = QGLShader::Fragment;
}
else {
fprintf(stderr, "Invalid shader type: %s\n", type);
delete[] filename;
return NULL;
}
QGLShader *shader = new QGLShader(shaderType);
if(!shader->compileSourceFile(filename)) {
fprintf(stderr, "Failed to load shader %s\n", filename);
fprintf(stdout, shader->log().toStdString().c_str());
delete shader;
delete[] filename;
return NULL;
}
delete[] filename;
return shader;
}