/usr/share/psychtoolbox-3/PsychGLImageProcessing/private/bvlDrawText.m is in psychtoolbox-3-common 3.0.11.20140816.dfsg1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 | function [newX, newY] = bvlDrawText(windowPtr, strMessage, x, y, iMirror, iSize)
% [newX, newY] = bvlDrawText(windowPtr, strMessage, [x,] [y,] [iMirror,]
% [iSize])
%
% Draw text to the screen.
% windowPtr is the window pointer returned from Screen (PsychToolbox)
% strMessage is text message to present, as a string
% x, y specifying the pixel coordinates in screen space. Default is screen center.
% iMirror can be either 0 or 1, specifies whether to mirror the message so
% the text will be readable on a stereoscope
% Default is not mirrored.
% iSize - Size of the text, 8 pt, 16 pt, etc...
%
% 2007-05-11 - cburns - Updated to use the new Psychtoolbox 3.x
% Note: Original version was called DrawText.m. Updated
% to bvl prefix to eliminate any namespace conflicts.
%
% Created: Feb 2006 - cburns - Bankslab, UC Berkeley
%
% Copy of Screen text based functions from PTB 3.0.8 for quick reference
% textModes = Screen('TextModes');
% oldCopyMode=Screen('TextMode', windowPtr [,textMode]);
% oldTextSize=Screen('TextSize', windowPtr [,textSize]);
% oldStyle=Screen('TextStyle', windowPtr [,style]);
% [oldFontName,oldFontNumber]=Screen(windowPtr,'TextFont' [,fontNameOrNumber]);
% [normBoundsRect, offsetBoundsRect]=Screen('TextBounds', windowPtr, text);
% [newX,newY]=Screen('DrawText', windowPtr, text [,x] [,y] [,color] [,backgroundColor] [,yPositionIsBaseline]);
% oldTextColor=Screen('TextColor', windowPtr [,colorVector]);
% oldTextBackgroundColor=Screen('TextBackgroundColor', windowPtr [,colorVector]);
% check args and set defaults
if (nargin < 1) || (length(strMessage) < 1)
return;
end
if (nargin < 6)
iSize = 24;
end
if (nargin < 5)
iMirror = 0;
end
[width, height] = Screen('WindowSize', windowPtr);
if (nargin < 4)
y = height / 2;
end
if (nargin < 3)
x = width / 2;
end
% Set text properties
if ~IsLinux
Screen(windowPtr, 'TextFont', 'Times');
end
Screen('TextSize', windowPtr, iSize);
if (iMirror == 1)
% Portions of this taken from PsychDemos/DrawMirroredTextDemo.m
% Get text bounds
[textBounds, offsetBounds] = Screen('TextBounds', windowPtr, strMessage);
% Offset to it's screenspace
textBounds = OffsetRect(textBounds, x, y);
% Find center of textRect
[xCenter, yCenter] = RectCenter(textBounds);
% Setup a local transform
Screen('glPushMatrix', windowPtr);
% Translate origin into the geometric center of text:
Screen('glTranslate', windowPtr, xCenter, 0, 0);
% Apple a scaling transform which flips the diretion of x-Axis,
% thereby mirroring the drawn text horizontally:
Screen('glScale', windowPtr, -1, 1, 1);
% We need to undo the translations...
Screen('glTranslate', windowPtr, -xCenter, 0, 0);
% The transformation is ready for mirrored drawing of text:
Screen('DrawText', windowPtr, strMessage, x, y);
% Pop local transformation of the stack
Screen('glPopMatrix', windowPtr);
else
Screen('DrawText', windowPtr, strMessage, x, y);
end
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