GLuint createProgram(GLenum type, const char* source)
{
GLchar logStr[MAX_INFOLOG_LENGTH];
GLint status, length;
GLuint program = glCreateProgram();
compileAndAttachShader(program, type, strlen(source), source);
glLinkProgram(program);
glGetProgramiv(program, GL_LINK_STATUS, &status);
if (!status)
{
glGetProgramInfoLog(program, MAX_INFOLOG_LENGTH, &length, logStr);
printf("%s", logStr);
glDeleteProgram(program);
return 0;
}
glValidateProgram(program);
glGetProgramiv(program, GL_VALIDATE_STATUS, &status);
if (!status)
{
glGetProgramInfoLog(program, MAX_INFOLOG_LENGTH, &length, logStr);
printf("%s", logStr);
}
return program;
}
bool DGLShader::create( bool linkNow )
{
_ready = false;
if( !_programID )
_programID = glCreateProgram();
// compile and attach the different shader objects
if( !compileAndAttachShader( _vertexShaderID, GL_VERTEX_SHADER, "Vertex Shader", _vertexShaderFilename, _vertexShaderString ) )
return false;
if( !compileAndAttachShader( _geometryShaderID, GL_GEOMETRY_SHADER, "Geometry Shader", _geometryShaderFilename, _geometryShaderString ) )
return false;
if( !compileAndAttachShader( _fragmentShaderID, GL_FRAGMENT_SHADER, "Fragment Shader", _fragmentShaderFilename, _fragmentShaderString ) )
return false;
if( linkNow )
return link();
return true;
}
/*
========================
compileAndLink2
========================
*/
bool CShader::compileAndLink2( void )
{
bool totalResult = true;
// clean up old state
deactivateProgram();
m_log = QString();
// create a new program object
m_program = glCreateProgram();
if( m_program == 0 )
{
m_log += QString( "ERROR: Failed on glCreateProgram()\n" );
return false;
}
// update shaders
for( int i = 0 ; i < MAX_SHADER_TYPES ; i++ )
{
bool result = compileAndAttachShader( i );
totalResult = totalResult && result;
}
// if we have shaders attached, link them to a program.
if( totalResult )
{
bool result = linkAndValidateProgram();
totalResult = totalResult && result;
}
// post processing...
if( totalResult )
{
setupInitialUniforms();
setupRememberedUniformState();
}
return totalResult;
}