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/*
Psychtoolbox3/Source/Common/SCREENPixelSize.c
AUTHORS:
Allen.Ingling@nyu.edu awi
PLATFORMS:
This file should build on any platform.
HISTORY:
1/14/03 awi Created.
DESCRIPTION:
Return the current pixel size of a screen or window.
*/
#include "Screen.h"
// If you change the useString then also change the corresponding synopsis string in ScreenSynopsis.c
static char useString[] = "pixelSize=Screen('PixelSize', windowPtrOrScreenNumber)";
static char synopsisString[] =
"Return the current pixel size of a screen or window. "
"pixel size refers to the color depth of a pixel in bits - also known as bpp or bits per pixel, "
"not to spatial size of the pixel. ";
static char seeAlsoString[] = "";
PsychError SCREENPixelSize(void)
{
int screenNumber;
double depth = 0;
PsychWindowRecordType *windowRecord;
//all sub functions should have these two lines
PsychPushHelp(useString, synopsisString, seeAlsoString);
if(PsychIsGiveHelp()){PsychGiveHelp();return(PsychError_none);};
//check to see if the user supplied superfluous arguments
PsychErrorExit(PsychCapNumOutputArgs(1));
PsychErrorExit(PsychCapNumInputArgs(1));
//get specified screen number.
if(PsychIsScreenNumberArg(1)){
PsychCopyInScreenNumberArg(1, TRUE, &screenNumber);
depth=(double)PsychGetScreenDepthValue(screenNumber);
}else if(PsychIsWindowIndexArg(1)){
PsychAllocInWindowRecordArg(1,TRUE,&windowRecord);
depth=(double)windowRecord->depth;
}else
PsychErrorExit(PsychError_invalidNumdex);
//Allocate a return matrix and load it with the depth values.
PsychCopyOutDoubleArg(1, FALSE, depth);
return(PsychError_none);
}
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