void Shader::check_shader(GLuint ShaderID,GLint &Result,int &InfoLogLength) {
glGetShaderiv(ShaderID,GL_COMPILE_STATUS,&Result);
glGetShaderiv(ShaderID,GL_INFO_LOG_LENGTH,&InfoLogLength);
std::vector<char> ShaderErrorMessage(InfoLogLength);
glGetShaderInfoLog(ShaderID,InfoLogLength, NULL,&ShaderErrorMessage[0]);
if(strcmp(&ShaderErrorMessage[0],""))fprintf(stdout, "%s\n", &ShaderErrorMessage[0]);
}
/*Get the log*/
GLint ShaderProgram::getLog(int type)
{
GLint iResult=GL_FALSE;
GLint iInfoLogLength;
glGetShaderiv(type,GL_COMPILE_STATUS,&iResult);
glGetShaderiv(type,GL_INFO_LOG_LENGTH,&iInfoLogLength);
if (iInfoLogLength>0)
{
std::vector<char> ShaderErrorMessage(iInfoLogLength+1);
glGetShaderInfoLog(type, iInfoLogLength, NULL, &ShaderErrorMessage[0]);
printf("%s\n", &ShaderErrorMessage[0]);
}
return iInfoLogLength;
}
void Shader::load(std::string filename) {
std::string ShaderCode = this->loadCode(filename);
GLint Result = GL_FALSE;
int InfoLogLength;
// Compile Shader
std::cout << "Compiling shader : " << filename << std::endl;
char const * SourcePointer = ShaderCode.c_str();
glShaderSource(this->id, 1, &SourcePointer , NULL);
glCompileShader(this->id);
// Check Shader
glGetShaderiv(this->id, GL_COMPILE_STATUS, &Result);
glGetShaderiv(this->id, GL_INFO_LOG_LENGTH, &InfoLogLength);
std::vector<char> ShaderErrorMessage(InfoLogLength);
glGetShaderInfoLog(this->id, InfoLogLength, NULL, &ShaderErrorMessage[0]);
fprintf(stdout, "%s\n", &ShaderErrorMessage[0]);
}
void Shader::Compile(std::string Filename)
{
ID = glCreateShader(type);
std::string ShaderCode;
std::ifstream ShaderStream;
// Load shader source code
ShaderStream.open(Filename.c_str(), std::ios::in );
if(ShaderStream.is_open() )
{
std::string line = "";
while(getline(ShaderStream, line))
{
ShaderCode += line + "\n";
}
ShaderStream.close();
}
else
cerr << "Could not open shader \"" << Filename << "\"" << endl;
GLint Result = GL_FALSE;
int InfoLogLength;
// Compile Shader
cout << "Compiling shader : " << Filename << endl;
char const * SourcePointer = ShaderCode.c_str();
glShaderSource(ID, 1, &SourcePointer , NULL);
glCompileShader(ID);
// Check Shader
glGetShaderiv(ID, GL_COMPILE_STATUS, &Result);
glGetShaderiv(ID, GL_INFO_LOG_LENGTH, &InfoLogLength);
std::vector<char> ShaderErrorMessage(InfoLogLength);
glGetShaderInfoLog(ID, InfoLogLength, NULL, &ShaderErrorMessage[0]);
string t(ShaderErrorMessage.begin(), ShaderErrorMessage.end() );
cout << t << endl;
}
void Shader::Add(char * path, GLenum type)
{
GLuint ShaderID = glCreateShader(type);
std::string ShaderCode = AString::LoadFileToString(path);
std::string sub = "#include";
std::string sub2 = "\"";
std::string s_path = std::string(path);
size_t pos = ShaderCode.find(sub, 0);
while (pos != std::string::npos)
{
size_t f_pos = pos;
size_t t_pos = ShaderCode.find(sub2, pos + 1);
pos = ShaderCode.find(sub2, t_pos + 1);
std::string t_file = s_path.substr(0, s_path.find_last_of("//") + 1) + ShaderCode.substr(t_pos + 1, pos - (t_pos + 1));
ShaderCode.erase(f_pos, pos - f_pos + 1);
ShaderCode.insert(f_pos, AString::LoadFileToString(AString::char_to_str(t_file)));
pos = ShaderCode.find(sub, f_pos + 1);
}
GLint Result = GL_FALSE;
int InfoLogLength;
printf("Compiling shader : %s\n", path);
char const * SourcePointer = ShaderCode.c_str();
glShaderSource(ShaderID, 1, &SourcePointer, NULL);
glCompileShader(ShaderID);
glGetShaderiv(ShaderID, GL_COMPILE_STATUS, &Result);
glGetShaderiv(ShaderID, GL_INFO_LOG_LENGTH, &InfoLogLength);
if (InfoLogLength > 0)
{
std::vector<char> ShaderErrorMessage(InfoLogLength + 1);
glGetShaderInfoLog(ShaderID, InfoLogLength, NULL, &ShaderErrorMessage[0]);
printf("%s\n", &ShaderErrorMessage[0]);
}
glAttachShader(this->program, ShaderID);
glDeleteShader(ShaderID);
}