void Program::link()
{
glLinkProgram(program);
GL_CHECK_ERROR();
if (programLinkStatus(program) == false)
throw error("error linking program: " + programInfoLog(program));
}
/**
* Create a GLSL program object from vertex and fragment shader files.
*
* @param vShaderFile The vertex shader filename
* @param fShaderFile The fragment shader filename
* @return handle to the GLSL program
*/
GLuint createGLSLProgram(const char* vertexSource, const char* fragmentSource)
{
GLuint vertexShader;
GLuint fragmentShader;
char* log;
_program = glCreateProgram();
// Create vertex shader
vertexShader = createShader(vertexSource, GL_VERTEX_SHADER);
// Check for compile errors
if(!shaderCompileStatus(vertexShader))
{
log = getShaderLog(vertexShader);
fprintf(stderr, "Could not compile vertex shader:\n%s\n", log);
free(log);
terminate(EXIT_FAILURE);
}
// Create fragment shader
fragmentShader = createShader(fragmentSource, GL_FRAGMENT_SHADER);
// Check for compile errors
if(!shaderCompileStatus(fragmentShader))
{
log = getShaderLog(fragmentShader);
fprintf(stderr, "Could not compile fragment shader:\n%s\n", log);
free(log);
terminate(EXIT_FAILURE);
}
// Attach the shaders to the program
glAttachShader(_program, vertexShader);
glAttachShader(_program, fragmentShader);
// Link the program
glLinkProgram(_program);
// Check for linker errors
if(!programLinkStatus(_program))
{
log = getProgramLog(_program);
fprintf(stderr, "GLSL program filed to link:\n%s\n", log);
free(log);
terminate(EXIT_FAILURE);
}
return _program;
}