int ShaderProgram::loadShader(const char* shader_filepath, GLuint &shader)
{
// Read shader code
std::string shaderCode = "";
std::ifstream shaderStream(shader_filepath, std::ios::in);
if(shaderStream.is_open())
{
std::string Line = "";
while(getline(shaderStream, Line)) shaderCode += "\n" + Line;
shaderStream.close();
}
else { printf("Failed to open %s.\n", shader_filepath); getchar(); return -1;}
// Compile shader
//printf("Compiling shader: %s\n", shader_filepath);
char const* source = shaderCode.c_str();
glShaderSource(shader, 1, &source , NULL);
glCompileShader(shader);
// Check shader
GLint result = GL_FALSE; int infoLogLength;
glGetShaderiv(shader, GL_COMPILE_STATUS, &result);
glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &infoLogLength);
if (infoLogLength > 0)
{
std::vector<char> shaderErrorMessage(infoLogLength+1);
glGetShaderInfoLog(shader, infoLogLength, NULL, &shaderErrorMessage[0]);
printf("%s\n", &shaderErrorMessage[0]);
return -2;
}
return 0;
}
void Shader::LoadShader( const std::string &filename, int type ) {
GLuint shaderID = glCreateShader( type );
std::string shaderCode;
std::ifstream shaderStream( filename, std::ios::in );
if ( shaderStream.is_open() ) {
std::string line = "";
while ( getline( shaderStream, line ) ) {
shaderCode += "\n" + line;
}
shaderStream.close();
} else {
fprintf( stderr, "Error loading shader." );
return;
}
GLint result = GL_FALSE;
int infoLogLength;
char const *sourcePoint = shaderCode.c_str();
glShaderSource( shaderID, 1, &sourcePoint, NULL );
glCompileShader( shaderID );
glGetShaderiv( shaderID, GL_COMPILE_STATUS, &result );
glGetShaderiv( shaderID, GL_INFO_LOG_LENGTH, &infoLogLength );
std::vector<char> shaderErrorMessage( infoLogLength );
glGetShaderInfoLog( shaderID, infoLogLength, NULL, &shaderErrorMessage[ 0 ] );
// fprintf( stdout, "%s\n", &shaderErrorMessage[ 0 ] );
AttachShader( shaderID );
}
void Shader::buildShader(GLuint shaderLoc, const char* fileName) {
// Read the Vertex Shader code from the file
std::string shaderCode;
std::ifstream shaderStream(fileName, std::ios::in);
if (shaderStream.is_open()) {
std::string Line = "";
while (getline(shaderStream, Line))
shaderCode += "\n" + Line;
shaderStream.close();
} else {
LOG_FATAL(logger) << "Could not open file!";
}
// Compile Shader
char const * sourcePointer = shaderCode.c_str();
glShaderSource(shaderLoc, 1, &sourcePointer , NULL);
glCompileShader(shaderLoc);
// Check Vertex Shader
GLint Result = GL_FALSE;
int InfoLogLength;
glGetShaderiv(shaderLoc, GL_COMPILE_STATUS, &Result);
glGetShaderiv(shaderLoc, GL_INFO_LOG_LENGTH, &InfoLogLength);
std::vector<char> shaderErrorMessage(InfoLogLength);
glGetShaderInfoLog(shaderLoc, InfoLogLength, NULL, &shaderErrorMessage[0]);
if (!Result)
LOG_ERROR(logger) << &shaderErrorMessage[0];
}
void Shaders::compileShader(GLuint shaderID, const std::string& sourceCode, GLint* result, int* infoLogLength)
{
char const * cstringSourceCode = sourceCode.c_str();
glShaderSource(shaderID, 1, &cstringSourceCode , NULL);
glCompileShader(shaderID);
// Check Vertex Shader
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]);
}
}
void ShaderProgram::compileShader(GLuint shader, std::string shaderCode) {
GLint compileResult = GL_FALSE;
int infoLogLength;
char const *sourcePointer = shaderCode.c_str();
glShaderSource(shader, 1, &sourcePointer, NULL);
glCompileShader(shader);
glGetShaderiv(shader, GL_COMPILE_STATUS, &compileResult);
if(compileResult == GL_FALSE) {
glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &infoLogLength);
std::vector<char> shaderErrorMessage(infoLogLength);
glGetShaderInfoLog(shader, infoLogLength, NULL, &shaderErrorMessage[0]);
throw ShaderException(std::string("Error compiling shader: ") + &shaderErrorMessage[0]);
}
}
GLboolean Program::attachShader(std::string filename, GLenum type)
{
GLuint shaderId = glCreateShader(type);
std::string shaderCode;
std::ifstream shaderStream(filename, std::ios::in);
if(shaderStream.is_open())
{
std::string line = "";
while(getline(shaderStream, line))
shaderCode += "\n" + line;
shaderStream.close();
}
else
{
std::cerr << clog::err << "Cannot open " << filename << "." << std::endl;
std::cin.get();
return GL_FALSE;
}
GLint result = GL_FALSE;
GLint infoLogLength;
//compile vertex shader
std::cout << clog::inf << "Compiling shader (" << filename << ")..." << std::endl;
char const* sourcePointer = shaderCode.c_str();
glShaderSource(shaderId, 1, &sourcePointer , NULL);
glCompileShader(shaderId);
//check vertex shader
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]);
std::cerr << clog::err << &shaderErrorMessage[0] << std::endl;
}
glAttachShader(instance, shaderId);
//glDeleteShader(vertexShaderId);
return GL_TRUE;
}
/// <summary>
/// Loads the shader.
/// </summary>
/// <param name="filename">The filename.</param>
/// <param name="type">The type.</param>
/// <returns></returns>
GLuint ShaderProgram::LoadShader( const std::string& filename, GLenum type )
{
// Create the shader
GLuint shaderID = glCreateShader( type );
// Read the Shader code from the file
std::string shaderCode;
std::ifstream shaderStream( filename, std::ios::in );
if( shaderStream.is_open() )
{
std::string line = "";
while( getline( shaderStream, line ) )
shaderCode += "\n" + line;
shaderStream.close();
}
else
{
Debug::Log( "Could not find shader with path: " + filename );
return 0;
}
GLint result = GL_FALSE;
int infoLogLength;
// Compile Shader
Debug::Log( "Compiling shader: " + filename );
char const * sourcePointer = shaderCode.c_str();
glShaderSource( shaderID, 1, &sourcePointer, NULL );
glCompileShader( shaderID );
// Check Shader
glGetShaderiv( shaderID, GL_COMPILE_STATUS, &result );
glGetShaderiv( shaderID, GL_INFO_LOG_LENGTH, &infoLogLength );
std::vector<char> shaderErrorMessage( infoLogLength );
glGetShaderInfoLog( shaderID, infoLogLength, NULL, &shaderErrorMessage[0] );
Debug::Log( trim( std::string( shaderErrorMessage.begin(), shaderErrorMessage.end() ) ), LogType::Error );
CHECK_GL_ERROR();
return shaderID;
}
GLuint shaderhelper::compileShader(const std::string & shaderFilename, GLenum shaderType)
{
std::string shaderCode = loadShader(shaderFilename);
GLint compilationSuccess = GL_FALSE;
int infoLogLength;
GLuint shaderId = glCreateShader(shaderType);
char const * sourcePointer = shaderCode.c_str();
glShaderSource(shaderId, 1, &sourcePointer, nullptr);
glCompileShader(shaderId);
glGetShaderiv(shaderId, GL_COMPILE_STATUS, &compilationSuccess);
glGetShaderiv(shaderId, GL_INFO_LOG_LENGTH, &infoLogLength);
if (infoLogLength > 0) {
std::vector<char> shaderErrorMessage((unsigned long) (infoLogLength + 1));
glGetShaderInfoLog(shaderId, infoLogLength, nullptr, &shaderErrorMessage[0]);
throw std::runtime_error(&shaderErrorMessage[0]);
}
return shaderId;
}
GLuint loadShader(string file_path, GLuint shader)
{
GLuint shaderID = glCreateShader(shader);
string shaderCode;
ifstream shaderStream(file_path, std::ios::in);
if (shaderStream.is_open())
{
string Line = "";
while (getline(shaderStream, Line)) shaderCode += "\n" + Line;
shaderStream.close();
}
else
{
cerr << "Cannot open: " << file_path << endl;
return 0;
}
cout << "Compiling shader: " << file_path << endl;
char const* sourcePointer = shaderCode.c_str();
glShaderSource(shaderID, 1, &sourcePointer, NULL);
glCompileShader(shaderID);
GLint result = 0;
glGetShaderiv(shaderID, GL_COMPILE_STATUS, &result);
if (result == GL_FALSE)
{
GLint infoLogLength = 0;
glGetShaderiv(shaderID, GL_INFO_LOG_LENGTH, &infoLogLength);
vector<char> shaderErrorMessage(infoLogLength);
glGetShaderInfoLog(shaderID, infoLogLength, NULL, &shaderErrorMessage[0]);
cerr << &shaderErrorMessage[0] << endl;
return 0;
}
return shaderID;
}
GLuint Shaders::compileShaderCode(const std::string &code, GLenum type)
{
GLuint shaderHandle = glCreateShader(type);
char const *shaderCodeRaw = code.c_str();
glShaderSource(shaderHandle, 1, &shaderCodeRaw, NULL);
glCompileShader(shaderHandle);
GLint result = GL_FALSE;
int infoLength;
glGetShaderiv(shaderHandle, GL_COMPILE_STATUS, &result);
glGetShaderiv(shaderHandle, GL_INFO_LOG_LENGTH, &infoLength);
if (infoLength > 0) {
std::vector<char> shaderErrorMessage(infoLength + 1);
glGetShaderInfoLog(shaderHandle, infoLength, NULL, &shaderErrorMessage[0]);
std::cout << "Error compiling shader: " << &shaderErrorMessage[0] << std::endl;
} else {
std::cout << "Shader compilation successful" << std::endl;
}
return shaderHandle;
}
