private static int LoadProgram(string vertexShader, string fragmentShader)
{
int id = GLES20.CreateProgram();
if (id == 0)
{
throw new Exception("Could not create new program.");
}
int vertexShaderId = LoadShader(GLES20.GL_VERTEX_SHADER, vertexShader);
int fragmentShaderId = LoadShader(GLES20.GL_FRAGMENT_SHADER, fragmentShader);
GLES20.AttachShader(id, vertexShaderId);
GLES20.AttachShader(id, fragmentShaderId);
GLES20.LinkProgram(id);
GLES20.DeleteShader(vertexShaderId);
GLES20.DeleteShader(fragmentShaderId);
int status;
GLES20.GetProgramiv(id, GLES20.GL_LINK_STATUS, out status);
if (status == 0)
{
string log = GLES20.GetProgramInfoLog(id);
GLES20.DeleteProgram(id);
throw new Exception("Error linking program: " + log);
}
GLES20.ValidateProgram(id);
GLES20.GetProgramiv(id, GLES20.GL_VALIDATE_STATUS, out status);
if (status == 0)
{
string log = GLES20.GetProgramInfoLog(id);
throw new Exception("Results of validating program: " + status + ". Log: " + log);
}
CheckError("Program load");
return(id);
}
private void glesControl1_OnDestroy()
{
GLES20.DeleteProgram(_program);
_buffer.Dispose();
}