void ae3d::Shader::Load( const char* vertexSource, const char* fragmentSource )
{
GLuint vertexShader = CompileShader( vertexSource, GL_VERTEX_SHADER );
GLuint fragmentShader = CompileShader( fragmentSource, GL_FRAGMENT_SHADER );
GLuint program = GfxDevice::CreateProgramId();
if (GfxDevice::HasExtension( "KHR_debug" ))
{
glObjectLabel( GL_PROGRAM, id, (GLsizei)std::string( "shader" ).size(), "shader" );
}
glAttachShader( program, vertexShader );
glAttachShader( program, fragmentShader );
glLinkProgram( program );
GLint wasLinked;
glGetProgramiv( program, GL_LINK_STATUS, &wasLinked );
if (!wasLinked)
{
ae3d::System::Print("Shader linking failed.\n");
PrintInfoLog( program, InfoLogType::Program );
return;
}
id = program;
uniformLocations = GetUniformLocations( program );
}
bool ShaderProgram::Link()
{
glLinkProgram( id );
GLint success;
glGetProgramiv( id, GL_LINK_STATUS, &success );
bool isValid = ( success == GL_TRUE );
if( !isValid )
{
PrintInfoLog();
return false;
}
// Get active attributes for attribute map creation
glGetProgramiv( id, GL_ACTIVE_ATTRIBUTES, &numAttributes );
attrArray = new ShaderAttribute * [ numAttributes ];
// Get active uniforms for parameter map creation
glGetProgramiv( id, GL_ACTIVE_UNIFORMS, &numParams );
uniformsArray = new Uniform * [ numParams ];
RetrieveAttributes();
RetrieveParameters();
// Bind attributes
for( int i=0; i<numAttributes; i++ )
glBindAttribLocation( id, attrArray[i]->location, attrArray[i]->name.c_str() );
// Detach after linking
for( int i=0; i<shadersArray.size(); i++ )
{
DetachShader( shadersArray[i] );
}
return true;
}
