openPTB.m

function [ PTB ] = openPTB( bgclr, varargin )
%UNTITLED8 Summary of this function goes here
%   Detailed explanation goes here

fprintf('\n\n');
fprintf('Opening PTB window...\n')

smallscreen = 0;
if nargin > 1
    if strcmp(varargin{1}, 'smallscreen')
        smallscreen = 1;
    elseif strcmp(varargin{1}, 'smallscreenhome')
        smallscreen = 2;
    end
end

% PTB parameters
screens         = Screen('Screens');
screenNumber    = max(screens);

% Here we call some default settings for setting up Psychtoolbox
PsychDefaultSetup(2);

% init PTB structure
PTB             = {};

% Open the window
if smallscreen == 1
    [PTB.window, PTB.windowRect]    = PsychImaging('OpenWindow', screenNumber, bgclr, [0 0 1267 800]);
elseif smallscreen == 2
    [PTB.window, PTB.windowRect]    = PsychImaging('OpenWindow', screenNumber, bgclr, [0 0 850 530]);
else
    [PTB.window, PTB.windowRect]    = PsychImaging('OpenWindow', screenNumber, bgclr);
end

% clear the screen
Screen('Flip', PTB.window);

% makes it so that characters typed don't show up in the command window
ListenChar(-1);

% hide cursor
HideCursor(PTB.window);

% Set up alpha-blending for smooth (anti-aliased) lines to draw fixation cross
Screen('BlendFunction', PTB.window, 'GL_SRC_ALPHA', 'GL_ONE_MINUS_SRC_ALPHA');

% Return width and height of the graphics window/screen in pixels
[PTB.width, PTB.height]     = Screen('WindowSize', PTB.window);

% Retrieve monitor refresh rate
PTB.hz                      = Screen('NominalFrameRate', PTB.window);

% Get the centre coordinate of the window in pixels.
[PTB.xCenter, PTB.yCenter]  = RectCenter(PTB.windowRect);

% Query the inter-frame-interval. This refers to the minimum possible time
% between drawing to the screen
PTB.ifi                     = Screen('GetFlipInterval', PTB.window);

% Get the maximum coded luminance level (this should be 1)
PTB.maxLum                  = Screen('ColorRange', PTB.window);

% Print resolution and refreh rate in Matlab's Command Window
fprintf('\n\n\n\n');
fprintf('Running on a %d x %d screen at %d Hz\n', PTB.width, PTB.height, PTB.hz);
fprintf('Inter-frame-interval is %d\n', PTB.ifi);
fprintf('Maximum coded luminance is %d\n', PTB.maxLum);
fprintf('\n\n\n\n');

% Init UI
Screen('Preference', 'DefaultFontSize', 20);
Screen('TextFont',  PTB.window, 'Consolas');

% KB
KbName( 'UnifyKeyNames' );
end