void Shader::compileShader()
{
glLinkProgram(m_program);
checkShaderError(m_program, GL_LINK_STATUS, true, "Error linking shader program");
// glGetProgramiv(program, GL_LINK_STATUS, &success);
//if (success == 0)
//{
// glGetProgramInfoLog(program, sizeof(error), NULL, ErrorLog);
// fprintf(stderr, "Error linking shader program: '%s'\n", ErrorLog);
// exit(1);
//}
glValidateProgram(m_program);
checkShaderError(m_program, GL_VALIDATE_STATUS, true, "Invalid shader program");
//glGetProgramiv(program, GL_VALIDATE_STATUS, &Success);
//if (!success) {
// glGetProgramInfoLog(ShaderProgram, sizeof(error), NULL, ErrorLog);
// fprintf(stderr, "Invalid shader program: '%s'\n", ErrorLog);
// exit(1);
//}
//glUseProgram(program);
//gScaleLocation = glGetUniformLocation(ShaderProgram, "gScale");
//assert(gScaleLocation != 0xFFFFFFFF);
}
void init() {
if (!initialized) {
GLuint vertexShaderId = glCreateShader(GL_VERTEX_SHADER);
GLuint fragmentShaderId = glCreateShader(GL_FRAGMENT_SHADER);
// vertex shader
glShaderSource(vertexShaderId, 1, &vertexShader, NULL);
glCompileShader(vertexShaderId);
checkShaderError(vertexShaderId,
"Vertex shader compilation failed.");
// fragment shader
glShaderSource(fragmentShaderId, 1, &fragmentShader, NULL);
glCompileShader(fragmentShaderId);
checkShaderError(fragmentShaderId,
"Fragment shader compilation failed.");
// linking program
programId = glCreateProgram();
glAttachShader(programId, vertexShaderId);
glAttachShader(programId, fragmentShaderId);
glLinkProgram(programId);
checkProgramError(programId, "Shader program link failed.");
// once linked into a program, we no longer need the shaders.
glDeleteShader(vertexShaderId);
glDeleteShader(fragmentShaderId);
projectionUniformId = glGetUniformLocation(programId, "projection");
modelViewUniformId = glGetUniformLocation(programId, "modelView");
initialized = true;
}
}
Shader::Shader(const std::string& fileName)
{
m_program = glCreateProgram();
m_shaders[0] = createShader(loadShader("./res/shaders/" + fileName + ".vs"), GL_VERTEX_SHADER); //Vertex shader
m_shaders[1] = createShader(loadShader("./res/shaders/" + fileName + ".fs"), GL_FRAGMENT_SHADER); //Fragment shader
for (unsigned int i = 0; i < NUM_SHADERS; i++)
glAttachShader(m_program, m_shaders[i]);
glBindAttribLocation(m_program, 0, "position");
glBindAttribLocation(m_program, 1, "texCoords");
glBindAttribLocation(m_program, 2, "normal");
glBindAttribLocation(m_program, 3, "tangent");
glLinkProgram(m_program);
checkShaderError(m_program, GL_LINK_STATUS, true, "Shader program link failed: ");
glValidateProgram(m_program);
checkShaderError(m_program, GL_VALIDATE_STATUS, true, "Shader program validation failed: ");
m_uniforms[MODEL_U] = glGetUniformLocation(m_program, "model");
m_uniforms[VIEW_U] = glGetUniformLocation(m_program, "view");
m_uniforms[PROJECTION_U] = glGetUniformLocation(m_program, "projection");
m_uniforms[VIEWPOS_U] = glGetUniformLocation(m_program, "viewPos");
m_uniforms[LIGHTPOS_U] = glGetUniformLocation(m_program, "lightPos");
m_uniforms[MAT_DIFFUSE_U] = glGetUniformLocation(m_program, "diffuseMap");
//m_uniforms[MAT_SPECULAR_U] = glGetUniformLocation(m_program, "material.specular");
m_uniforms[MAT_EMISSION_U] = glGetUniformLocation(m_program, "emissionMap");
m_uniforms[MAT_NORMAL_U] = glGetUniformLocation(m_program, "normalMap");
/*m_uniforms[MAT_SHININESS_U] = glGetUniformLocation(m_program, "material.shininess");
m_uniforms[DLIGHT_DIRECTION_U] = glGetUniformLocation(m_program, "dirLight.direction");
m_uniforms[DLIGHT_AMBIENT_U] = glGetUniformLocation(m_program, "dirLight.ambient");
m_uniforms[DLIGHT_DIFFUSE_U] = glGetUniformLocation(m_program, "dirLight.diffuse");
m_uniforms[DLIGHT_SPECULAR_U] = glGetUniformLocation(m_program, "dirLight.specular");
m_uniforms[PLIGHT_POSITION_U] = glGetUniformLocation(m_program, "pointLight.position");
m_uniforms[PLIGHT_AMBIENT_U] = glGetUniformLocation(m_program, "pointLight.ambient");
m_uniforms[PLIGHT_DIFFUSE_U] = glGetUniformLocation(m_program, "pointLight.diffuse");
m_uniforms[PLIGHT_SPECULAR_U] = glGetUniformLocation(m_program, "pointLight.specular");
m_uniforms[PLIGHT_CONSTANT_U] = glGetUniformLocation(m_program, "pointLight.constant");
m_uniforms[PLIGHT_LINEAR_U] = glGetUniformLocation(m_program, "pointLight.position");
m_uniforms[PLIGHT_QUADRATIC_U] = glGetUniformLocation(m_program, "pointLight.quadratic");*/
}
TTShader::TTShader(const std::string &fileName)
{
initializeOpenGLFunctions();
m_program = glCreateProgram();
m_shaders[0] = createShader(loadShader(fileName + ".vert"), GL_VERTEX_SHADER);
m_shaders[1] = createShader(loadShader(fileName + ".fsh"), GL_FRAGMENT_SHADER);
for (unsigned int i = 0; i < NUM_SHADERS; i++) {
glAttachShader(m_program, m_shaders[i]);
}
glLinkProgram(m_program);
checkShaderError(m_program, GL_LINK_STATUS, true, "Linking failed:");
glValidateProgram(m_program);
checkShaderError(m_program, GL_VALIDATE_STATUS, true, "Program is invalid:");
m_uniforms[TT_TRANSFORM_U] = glGetUniformLocation(m_program, "transformation");
}
Shader::Shader(const std::string& fileName) {
program = glCreateProgram();
shaders[0] = createShader(loadShader(fileName + ".vs"), GL_VERTEX_SHADER);
shaders[1] = createShader(loadShader(fileName + ".fs"), GL_FRAGMENT_SHADER);
for(unsigned int i = 0; i < NUM_SHADERS; i++)
glAttachShader(program, shaders[i]);
glBindAttribLocation(program, 0, "position");
glBindAttribLocation(program, 1, "texCoord");
glBindAttribLocation(program, 2, "normal");
glLinkProgram(program);
checkShaderError(program, GL_LINK_STATUS, true, "Program linking failed: ");
glValidateProgram(program);
checkShaderError(program, GL_VALIDATE_STATUS, true, "Program is invalid: ");
uniforms[0] = glGetUniformLocation(program, "MVP");
uniforms[1] = glGetUniformLocation(program, "Normal");
uniforms[2] = glGetUniformLocation(program, "lightDirection");
}
Shader::Shader(const std::string& filename)
{
program = glCreateProgram();
shaders[vertexShader] = createShader(loadShader(filename + ".vert"), GL_VERTEX_SHADER);
shaders[fragmentShader] = createShader(loadShader(filename + ".frag"), GL_FRAGMENT_SHADER);
for (unsigned int i = 0; i < NUM_SHADERS; i++)
{
glAttachShader(program, shaders[i]);
}
glBindAttribLocation(program, 0, "position");
glBindAttribLocation(program, 1, "texCoord");
glBindAttribLocation(program, 2, "normal");
glLinkProgram(program);
checkShaderError(program, GL_LINK_STATUS, true, "Error: Program linking failed: ");
glValidateProgram(program);
checkShaderError(program, GL_VALIDATE_STATUS, true, "Error: Program is invalid: ");
uniforms[TRANFORM_U] = glGetUniformLocation(program, "transform");
}
static GLuint createShader(const std::string& code, GLenum type)
{
GLuint shader = glCreateShader(type);
if (shader == 0)
std::cerr << "Shader creation failed." << std::endl;
const GLchar* shaderSource[1];
GLint shaderSourceLength[1];
shaderSource[0] = code.c_str();
shaderSourceLength[0] = code.length();
glShaderSource(shader, 1, shaderSource, shaderSourceLength);
glCompileShader(shader);
checkShaderError(shader, GL_COMPILE_STATUS, false, "Shader compilation failed: ");
return shader;
}
GLuint TTShader::createShader(const std::string &text, GLenum type)
{
GLuint shader = glCreateShader(type);
if (shader == 0)
qDebug() << "Shader creation failed!";
const GLchar* shaderSourceStrings[1];
shaderSourceStrings[0] = text.c_str();
GLint shaderSourceStringLengths[1];
shaderSourceStringLengths[0] = text.length();
glShaderSource(shader, 1, shaderSourceStrings, shaderSourceStringLengths);
glCompileShader(shader);
checkShaderError(shader, GL_COMPILE_STATUS, false, "Shader did not compile:");
return shader;
}
GLuint Shader::createShader(const std::string& text, GLenum shaderType) {
GLuint shader = glCreateShader(shaderType);
if(shader == 0)
std::cerr << "Shader creation failed: " << std::endl;
const GLchar* shaderSourceStrings[1];
GLint shaderSourceStringLengths[1];
shaderSourceStrings[0] = text.c_str();
shaderSourceStringLengths[0] = text.length();
glShaderSource(shader, 1 ,shaderSourceStrings, shaderSourceStringLengths);
glCompileShader(shader);
checkShaderError(shader, GL_COMPILE_STATUS, false, "Shader compilation failed: ");
return shader;
}
const GLuint render::ShaderFactory::getShader(const std::string shaderName, GLenum shaderType) {
//Check for shader in flyweight pool
if(shaders.find(shaderName) != shaders.end()) {
return shaders[shaderName];
}
//Shader not in flyweight pool: load and compile shader
std::ifstream shaderSourceFile(std::string("./shaders/" + shaderName + ".glsl").c_str());
if(!shaderSourceFile.is_open()) {
//TODO To logging
std::cerr << "Could not find shader " << shaderName << std::endl;
assert(shaderSourceFile.is_open());
}
std::stringstream shaderSourceStream;
while(shaderSourceFile.good()) {
std::string line;
std::getline(shaderSourceFile, line);
shaderSourceStream << line << std::endl;
}
//We need to copy the C-string because of the volatile characteristics of std::string.c_str()
char* shaderSourceCString = new char[shaderSourceStream.str().size()+1];
std::strcpy(shaderSourceCString, shaderSourceStream.str().c_str());
GLuint shader = glCreateShader(shaderType);
glShaderSource(shader, 1, (const GLchar**) &shaderSourceCString, 0);
glCompileShader(shader);
checkShaderError(shader);
delete[] shaderSourceCString;
shaders.insert(std::pair<std::string, GLuint>(shaderName, shader));
return shader;
}
static GLuint createShader(const std::string& code, GLenum shaderType)
{
GLuint shader = glCreateShader(shaderType);
if (shader == 0)
{
std::cerr << "Error: Shader creation failed!" << std::endl;
}
const GLchar* shaderSourceStrings[1];
GLint shaderSourceStringLengths[1];
shaderSourceStrings[0] = code.c_str();
shaderSourceStringLengths[0] = code.length();
glShaderSource(shader, 1, shaderSourceStrings, shaderSourceStringLengths);
glCompileShader(shader);
checkShaderError(shader, GL_COMPILE_STATUS, false, "Error: Shader compilation failed: ");
return shader;
}
void Shader::createShader(const std::string& shaderFile)
{
_vertexShaderID = glCreateShader(GL_VERTEX_SHADER);
_fragmentShaderID = glCreateShader(GL_FRAGMENT_SHADER);
std::string vertexShaderCode;
std::ifstream vertexShaderStream(shaderFile+".vert", std::ios::in);
if (vertexShaderStream.is_open())
{
std::string line = "";
while (std::getline(vertexShaderStream, line))
vertexShaderCode += "\n" + line;
vertexShaderStream.close();
}
std::string fragmentShaderCode;
std::ifstream fragmentShaderStream(shaderFile + ".frag", std::ios::in);
if (fragmentShaderStream.is_open())
{
std::string line = "";
while (std::getline(fragmentShaderStream, line))
fragmentShaderCode += "\n" + line;
fragmentShaderStream.close();
}
compileShader(vertexShaderCode, fragmentShaderCode);
checkShaderError();
linkShader();
glDeleteShader(_vertexShaderID);
glDeleteShader(_fragmentShaderID);
}
