PsychError SCREENPreference(void)
{
PsychArgFormatType arg1Type;
char *preferenceName, *newFontName;
const char *tableCreator, *oldDefaultFontName;
Boolean preferenceNameArgumentValid, booleanInput, ignoreCase, tempFlag, textAlphaBlendingFlag, suppressAllWarningsFlag;
int numInputArgs, i, newFontStyleNumber, newFontSize, tempInt;
double returnDoubleValue, inputDoubleValue;
//all sub functions should have these two lines
PsychPushHelp(useString, synopsisString,seeAlsoString);
if(PsychIsGiveHelp()){PsychGiveHelp();return(PsychError_none);};
//check for superfluous or missing arguments
PsychErrorExit(PsychCapNumInputArgs(3));
PsychErrorExit(PsychRequireNumInputArgs(1));
PsychErrorExit(PsychCapNumOutputArgs(1));
numInputArgs=PsychGetNumInputArgs();
arg1Type=PsychGetArgType(1);
preferenceNameArgumentValid=FALSE;
//Cases which require both a window pointer or screen number and preference name. Argument 1 is the wposn and argument 2 is the preference name.
if( numInputArgs >= 2 && (PsychIsScreenNumberArg(1) || PsychIsScreenNumberArg(1)) && PsychGetArgType(2)==PsychArgType_char ){
PsychAllocInCharArg(2, kPsychArgRequired, &preferenceName);
//preferences which require window pointer or screen number argument which we DO NOT support
for(i=0;i<kPsychNumUnsupportedMacVideoPreferences;i++){
if(PsychMatch(preferenceName, unsupportedMacVideoPreferenceNames[i]))
PsychErrorExit(PsychError_unsupportedOS9Preference);
}
//insert here conditionals to act on prefernces which accept a window pointer or screen number argument which we DO support.
PsychErrorExit(PsychError_unrecognizedPreferenceName);
}
//Cases which do not require a wposn. Argument 1 is the preference name. if present Argument 2 is the new value
if(arg1Type==PsychArgType_char){
PsychAllocInCharArg(1, kPsychArgRequired, &preferenceName);
//Preferernces which we do not support and which do not require a wposn
for(i=0;i<kPsychNumUnsupportedMacNonVideoPreferences;i++){
if(PsychMatch(preferenceName, unsupportedMacNonVideoPreferenceNames[i]))
PsychErrorExit(PsychError_unsupportedOS9Preference);
}
//Preferences which we do support
if(PsychMatch(preferenceName, "IgnoreCase")){
ignoreCase=!PsychIsPsychMatchCaseSensitive();
PsychCopyOutFlagArg(1, kPsychArgOptional, ignoreCase);
if(numInputArgs==2){
PsychCopyInFlagArg(2, kPsychArgRequired, &booleanInput);
PsychSetPsychMatchCaseSenstive(!booleanInput);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "Tick0Secs")){
if(PsychCopyInDoubleArg(2, kPsychArgOptional, &inputDoubleValue) && inputDoubleValue==PsychGetNanValue())
PsychEstimateGetSecsValueAtTickCountZero();
returnDoubleValue=PsychGetEstimatedSecsValueAtTickCountZero();
PsychCopyOutDoubleArg(1, kPsychArgOptional, returnDoubleValue);
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "PsychTableVersion")){
if(numInputArgs==2)
PsychErrorExit(PsychError_extraInputArg);
PsychCopyOutDoubleArg(1, kPsychArgOptional, (double)PsychPrefStateGet_PsychTableVersion());
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "PsychTableCreator")){
if(numInputArgs==2)
PsychErrorExit(PsychError_extraInputArg);
tableCreator=PsychPrefStateGet_PsychTableCreator();
PsychCopyOutCharArg(1, kPsychArgOptional, tableCreator);
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "Process")){
if(numInputArgs==2)
PsychErrorExit(PsychError_extraInputArg);
PsychCopyOutDoubleArg(1, kPsychArgOptional, (double)getpid());
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "DefaultFontName")){
PsychPrefStateGet_DefaultFontName(&oldDefaultFontName);
PsychCopyOutCharArg(1, kPsychArgOptional, oldDefaultFontName);
if(numInputArgs==2){
PsychAllocInCharArg(2, kPsychArgRequired, &newFontName);
PsychPrefStateSet_DefaultFontName(newFontName);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "DefaultFontStyle")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_DefaultTextStyle());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &newFontStyleNumber);
PsychPrefStateSet_DefaultTextStyle(newFontStyleNumber);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "DefaultTextYPositionIsBaseline")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_TextYPositionIsBaseline());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_TextYPositionIsBaseline(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "DefaultFontSize")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_DefaultTextSize());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &newFontSize);
PsychPrefStateSet_DefaultTextSize(newFontSize);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "DebugMakeTexture")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_DebugMakeTexture());
if(numInputArgs==2){
PsychCopyInFlagArg(2, kPsychArgRequired, &tempFlag);
PsychPrefStateSet_DebugMakeTexture(tempFlag);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "SkipSyncTests")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_SkipSyncTests());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_SkipSyncTests(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "VisualDebugLevel")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_VisualDebugLevel());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_VisualDebugLevel(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "VBLTimestampingMode")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_VBLTimestampingMode());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_VBLTimestampingMode(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "ConserveVRAM")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_ConserveVRAM());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_ConserveVRAM(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "Verbosity")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_Verbosity());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_Verbosity(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "EmulateOldPTB")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_EmulateOldPTB());
if(numInputArgs==2){
PsychCopyInFlagArg(2, kPsychArgRequired, &tempFlag);
PsychPrefStateSet_EmulateOldPTB(tempFlag);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "Enable3DGraphics")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_3DGfx());
if(numInputArgs==2){
PsychCopyInFlagArg(2, kPsychArgRequired, &tempFlag);
PsychPrefStateSet_3DGfx(tempFlag);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "TextAlphaBlending")){
textAlphaBlendingFlag=PsychPrefStateGet_TextAlphaBlending();
PsychCopyOutFlagArg(1, kPsychArgOptional, textAlphaBlendingFlag);
if(numInputArgs==2){
PsychCopyInFlagArg(2, kPsychArgRequired, &booleanInput);
PsychPrefStateSet_TextAlphaBlending(booleanInput);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "SuppressAllWarnings")){
suppressAllWarningsFlag=PsychPrefStateGet_SuppressAllWarnings();
PsychCopyOutFlagArg(1, kPsychArgOptional, suppressAllWarningsFlag);
if(numInputArgs==2){
PsychCopyInFlagArg(2, kPsychArgRequired, &booleanInput);
PsychPrefStateSet_SuppressAllWarnings(booleanInput);
}
preferenceNameArgumentValid=TRUE;
}else
PsychErrorExit(PsychError_unrecognizedPreferenceName);
}
if(!preferenceNameArgumentValid)
PsychErrorExitMsg(PsychError_user, "Invalid arguments to preferences command");
return(PsychError_none);
}
PsychError SCREENGetImage(void)
{
PsychRectType windowRect,sampleRect;
int nrchannels, ix, iy, sampleRectWidth, sampleRectHeight, invertedY, redReturnIndex, greenReturnIndex, blueReturnIndex, alphaReturnIndex, planeSize;
int viewid;
ubyte *returnArrayBase, *redPlane, *greenPlane, *bluePlane, *alphaPlane;
float *dredPlane, *dgreenPlane, *dbluePlane, *dalphaPlane;
double *returnArrayBaseDouble;
PsychWindowRecordType *windowRecord;
GLboolean isDoubleBuffer, isStereo;
char* buffername = NULL;
boolean floatprecision = FALSE;
GLenum whichBuffer = 0;
//all sub functions should have these two lines
PsychPushHelp(useString, synopsisString, seeAlsoString);
if(PsychIsGiveHelp()){PsychGiveHelp();return(PsychError_none);};
//cap the numbers of inputs and outputs
PsychErrorExit(PsychCapNumInputArgs(5)); //The maximum number of inputs
PsychErrorExit(PsychCapNumOutputArgs(1)); //The maximum number of outputs
// Get windowRecord for this window:
PsychAllocInWindowRecordArg(kPsychUseDefaultArgPosition, TRUE, &windowRecord);
// Set window as drawingtarget: Even important if this binding is changed later on!
// We need to make sure all needed transitions are done - esp. in non-imaging mode,
// so backbuffer is in a useable state:
PsychSetDrawingTarget(windowRecord);
// Disable shaders:
PsychSetShader(windowRecord, 0);
// Soft-Reset drawingtarget. This is important to make sure no FBO's are bound,
// otherwise the following glGets for GL_DOUBLEBUFFER and GL_STEREO will retrieve
// wrong results, leading to totally wrong read buffer assignments down the road!!
PsychSetDrawingTarget(0x1);
glGetBooleanv(GL_DOUBLEBUFFER, &isDoubleBuffer);
glGetBooleanv(GL_STEREO, &isStereo);
// Retrieve optional read rectangle:
PsychGetRectFromWindowRecord(windowRect, windowRecord);
if(!PsychCopyInRectArg(2, FALSE, sampleRect)) memcpy(sampleRect, windowRect, sizeof(PsychRectType));
if (IsPsychRectEmpty(sampleRect)) return(PsychError_none);
// Assign read buffer:
if(PsychIsOnscreenWindow(windowRecord)) {
// Onscreen window: We read from the front- or front-left buffer by default.
// This works on single-buffered and double buffered contexts in a consistent fashion:
// Copy in optional override buffer name:
PsychAllocInCharArg(3, FALSE, &buffername);
// Override buffer name provided?
if (buffername) {
// Which one is it?
// "frontBuffer" is always a valid choice:
if (PsychMatch(buffername, "frontBuffer")) whichBuffer = GL_FRONT;
// Allow selection of left- or right front stereo buffer in stereo mode:
if (PsychMatch(buffername, "frontLeftBuffer") && isStereo) whichBuffer = GL_FRONT_LEFT;
if (PsychMatch(buffername, "frontRightBuffer") && isStereo) whichBuffer = GL_FRONT_RIGHT;
// Allow selection of backbuffer in double-buffered mode:
if (PsychMatch(buffername, "backBuffer") && isDoubleBuffer) whichBuffer = GL_BACK;
// Allow selection of left- or right back stereo buffer in stereo mode:
if (PsychMatch(buffername, "backLeftBuffer") && isStereo && isDoubleBuffer) whichBuffer = GL_BACK_LEFT;
if (PsychMatch(buffername, "backRightBuffer") && isStereo && isDoubleBuffer) whichBuffer = GL_BACK_RIGHT;
// Allow AUX buffer access for debug purposes:
if (PsychMatch(buffername, "aux0Buffer")) whichBuffer = GL_AUX0;
if (PsychMatch(buffername, "aux1Buffer")) whichBuffer = GL_AUX1;
if (PsychMatch(buffername, "aux2Buffer")) whichBuffer = GL_AUX2;
if (PsychMatch(buffername, "aux3Buffer")) whichBuffer = GL_AUX3;
}
else {
// Default is frontbuffer:
whichBuffer=GL_FRONT;
}
}
else {
// Offscreen window or texture: They only have one buffer, which is the
// backbuffer in double-buffered mode and the frontbuffer in single buffered mode:
whichBuffer=(isDoubleBuffer) ? GL_BACK : GL_FRONT;
}
// Enable this windowRecords framebuffer as current drawingtarget. This should
// also allow us to "GetImage" from Offscreen windows:
if ((windowRecord->imagingMode & kPsychNeedFastBackingStore) || (windowRecord->imagingMode & kPsychNeedFastOffscreenWindows)) {
// Special case: Imaging pipeline active - We need to activate system framebuffer
// so we really read the content of the framebuffer and not of some FBO:
if (PsychIsOnscreenWindow(windowRecord)) {
// It's an onscreen window:
if (buffername && (PsychMatch(buffername, "drawBuffer")) && (windowRecord->imagingMode & kPsychNeedFastBackingStore)) {
// Activate drawBufferFBO:
PsychSetDrawingTarget(windowRecord);
whichBuffer = GL_COLOR_ATTACHMENT0_EXT;
// Is the drawBufferFBO multisampled?
viewid = (((windowRecord->stereomode > 0) && (windowRecord->stereodrawbuffer == 1)) ? 1 : 0);
if (windowRecord->fboTable[windowRecord->drawBufferFBO[viewid]]->multisample > 0) {
// It is! We can't read from a multisampled FBO. Need to perform a multisample resolve operation and read
// from the resolved unisample buffer instead. This is only safe if the unisample buffer is either a dedicated
// FBO, or - in case its the final system backbuffer etc. - if preflip operations haven't been performed yet.
// If non dedicated buffer (aka finalizedFBO) and preflip ops have already happened, then the backbuffer contains
// final content for an upcoming Screen('Flip') and we can't use (and therefore taint) that buffer.
if ((windowRecord->inputBufferFBO[viewid] == windowRecord->finalizedFBO[viewid]) && (windowRecord->backBufferBackupDone)) {
// Target for resolve is finalized FBO (probably system backbuffer) and preflip ops have run already. We
// can't do the resolve op, as this would screw up the backbuffer with the final stimulus:
printf("PTB-ERROR: Tried to 'GetImage' from a multisampled 'drawBuffer', but can't perform anti-aliasing pass due to\n");
printf("PTB-ERROR: lack of a dedicated resolve buffer.\n");
printf("PTB-ERROR: You can get what you wanted by either one of two options:\n");
printf("PTB-ERROR: Either enable a processing stage in the imaging pipeline, even if you don't need it, e.g., by setting\n");
printf("PTB-ERROR: the imagingmode argument in the 'OpenWindow' call to kPsychNeedImageProcessing, this will create a\n");
printf("PTB-ERROR: suitable resolve buffer. Or place the 'GetImage' call before any Screen('DrawingFinished') call, then\n");
printf("PTB-ERROR: i can (ab-)use the system backbuffer as a temporary resolve buffer.\n\n");
PsychErrorExitMsg(PsychError_user, "Tried to 'GetImage' from a multi-sampled 'drawBuffer'. Unsupported operation under given conditions.");
}
else {
// Ok, the inputBufferFBO is a suitable temporary resolve buffer. Perform a multisample resolve blit to it:
// A simple glBlitFramebufferEXT() call will do the copy & downsample operation:
glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, windowRecord->fboTable[windowRecord->drawBufferFBO[viewid]]->fboid);
glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, windowRecord->fboTable[windowRecord->inputBufferFBO[viewid]]->fboid);
glBlitFramebufferEXT(0, 0, windowRecord->fboTable[windowRecord->inputBufferFBO[viewid]]->width, windowRecord->fboTable[windowRecord->inputBufferFBO[viewid]]->height,
0, 0, windowRecord->fboTable[windowRecord->inputBufferFBO[viewid]]->width, windowRecord->fboTable[windowRecord->inputBufferFBO[viewid]]->height,
GL_COLOR_BUFFER_BIT, GL_NEAREST);
// Bind inputBuffer as framebuffer:
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, windowRecord->fboTable[windowRecord->inputBufferFBO[viewid]]->fboid);
viewid = -1;
}
}
}
else {
// Activate system framebuffer:
PsychSetDrawingTarget(NULL);
}
}
else {
// Offscreen window or texture: Select drawing target as usual,
// but set color attachment as read buffer:
PsychSetDrawingTarget(windowRecord);
whichBuffer = GL_COLOR_ATTACHMENT0_EXT;
// We do not support multisampled readout:
if (windowRecord->fboTable[windowRecord->drawBufferFBO[0]]->multisample > 0) {
printf("PTB-ERROR: You tried to Screen('GetImage', ...); from an offscreen window or texture which has multisample anti-aliasing enabled.\n");
printf("PTB-ERROR: This operation is not supported. You must first use Screen('CopyWindow') to create a non-multisampled copy of the\n");
printf("PTB-ERROR: texture or offscreen window, then use 'GetImage' on that copy. The copy will be anti-aliased, so you'll get what you\n");
printf("PTB-ERROR: wanted with a bit more effort. Sorry for the inconvenience, but this is mostly a hardware limitation.\n\n");
PsychErrorExitMsg(PsychError_user, "Tried to 'GetImage' from a multi-sampled texture or offscreen window. Unsupported operation.");
}
}
}
else {
// Normal case: No FBO based imaging - Select drawing target as usual:
PsychSetDrawingTarget(windowRecord);
}
// Select requested read buffer, after some double-check:
if (whichBuffer == 0) PsychErrorExitMsg(PsychError_user, "Invalid or unknown 'bufferName' argument provided.");
glReadBuffer(whichBuffer);
if (PsychPrefStateGet_Verbosity() > 5) printf("PTB-DEBUG: In Screen('GetImage'): GL-Readbuffer whichBuffer = %i\n", whichBuffer);
// Get optional floatprecision flag: We return data with float-precision if
// this flag is set. By default we return uint8 data:
PsychCopyInFlagArg(4, FALSE, &floatprecision);
// Get the optional number of channels flag: By default we return 3 channels,
// the Red, Green, and blue color channel:
nrchannels = 3;
PsychCopyInIntegerArg(5, FALSE, &nrchannels);
if (nrchannels < 1 || nrchannels > 4) PsychErrorExitMsg(PsychError_user, "Number of requested channels 'nrchannels' must be between 1 and 4!");
sampleRectWidth=PsychGetWidthFromRect(sampleRect);
sampleRectHeight=PsychGetHeightFromRect(sampleRect);
if (!floatprecision) {
// Readback of standard 8bpc uint8 pixels:
PsychAllocOutUnsignedByteMatArg(1, TRUE, sampleRectHeight, sampleRectWidth, nrchannels, &returnArrayBase);
redPlane= PsychMallocTemp(nrchannels * sizeof(GL_UNSIGNED_BYTE) * sampleRectWidth * sampleRectHeight);
planeSize=sampleRectWidth * sampleRectHeight;
greenPlane= redPlane + planeSize;
bluePlane= redPlane + 2 * planeSize;
alphaPlane= redPlane + 3 * planeSize;
glPixelStorei(GL_PACK_ALIGNMENT,1);
invertedY=windowRect[kPsychBottom]-sampleRect[kPsychBottom];
glReadPixels(sampleRect[kPsychLeft],invertedY, sampleRectWidth, sampleRectHeight, GL_RED, GL_UNSIGNED_BYTE, redPlane);
if (nrchannels>1) glReadPixels(sampleRect[kPsychLeft],invertedY, sampleRectWidth, sampleRectHeight, GL_GREEN, GL_UNSIGNED_BYTE, greenPlane);
if (nrchannels>2) glReadPixels(sampleRect[kPsychLeft],invertedY, sampleRectWidth, sampleRectHeight, GL_BLUE, GL_UNSIGNED_BYTE, bluePlane);
if (nrchannels>3) glReadPixels(sampleRect[kPsychLeft],invertedY, sampleRectWidth, sampleRectHeight, GL_ALPHA, GL_UNSIGNED_BYTE, alphaPlane);
//in one pass transpose and flip what we read with glReadPixels before returning.
//-glReadPixels insists on filling up memory in sequence by reading the screen row-wise whearas Matlab reads up memory into columns.
//-the Psychtoolbox screen as setup by gluOrtho puts 0,0 at the top left of the window but glReadPixels always believes that it's at the bottom left.
for(ix=0;ix<sampleRectWidth;ix++){
for(iy=0;iy<sampleRectHeight;iy++){
// Compute write-indices for returned data:
redReturnIndex=PsychIndexElementFrom3DArray(sampleRectHeight, sampleRectWidth, nrchannels, iy, ix, 0);
greenReturnIndex=PsychIndexElementFrom3DArray(sampleRectHeight, sampleRectWidth, nrchannels, iy, ix, 1);
blueReturnIndex=PsychIndexElementFrom3DArray(sampleRectHeight, sampleRectWidth, nrchannels, iy, ix, 2);
alphaReturnIndex=PsychIndexElementFrom3DArray(sampleRectHeight, sampleRectWidth, nrchannels, iy, ix, 3);
// Always return RED/LUMINANCE channel:
returnArrayBase[redReturnIndex]=redPlane[ix + ((sampleRectHeight-1) - iy ) * sampleRectWidth];
// Other channels on demand:
if (nrchannels>1) returnArrayBase[greenReturnIndex]=greenPlane[ix + ((sampleRectHeight-1) - iy ) * sampleRectWidth];
if (nrchannels>2) returnArrayBase[blueReturnIndex]=bluePlane[ix + ((sampleRectHeight-1) - iy ) * sampleRectWidth];
if (nrchannels>3) returnArrayBase[alphaReturnIndex]=alphaPlane[ix + ((sampleRectHeight-1) - iy ) * sampleRectWidth];
}
}
}
else {
// Readback of standard 32bpc float pixels into a double matrix:
PsychAllocOutDoubleMatArg(1, TRUE, sampleRectHeight, sampleRectWidth, nrchannels, &returnArrayBaseDouble);
dredPlane= PsychMallocTemp(nrchannels * sizeof(GL_FLOAT) * sampleRectWidth * sampleRectHeight);
planeSize=sampleRectWidth * sampleRectHeight * sizeof(GL_FLOAT);
dgreenPlane= redPlane + planeSize;
dbluePlane= redPlane + 2 * planeSize;
dalphaPlane= redPlane + 3 * planeSize;
glPixelStorei(GL_PACK_ALIGNMENT, 1);
invertedY=windowRect[kPsychBottom]-sampleRect[kPsychBottom];
if (nrchannels==1) glReadPixels(sampleRect[kPsychLeft],invertedY, sampleRectWidth, sampleRectHeight, GL_RED, GL_FLOAT, dredPlane);
if (nrchannels==2) glReadPixels(sampleRect[kPsychLeft],invertedY, sampleRectWidth, sampleRectHeight, GL_LUMINANCE_ALPHA, GL_FLOAT, dredPlane);
if (nrchannels==3) glReadPixels(sampleRect[kPsychLeft],invertedY, sampleRectWidth, sampleRectHeight, GL_RGB, GL_FLOAT, dredPlane);
if (nrchannels==4) glReadPixels(sampleRect[kPsychLeft],invertedY, sampleRectWidth, sampleRectHeight, GL_RGBA, GL_FLOAT, dredPlane);
//in one pass transpose and flip what we read with glReadPixels before returning.
//-glReadPixels insists on filling up memory in sequence by reading the screen row-wise whearas Matlab reads up memory into columns.
//-the Psychtoolbox screen as setup by gluOrtho puts 0,0 at the top left of the window but glReadPixels always believes that it's at the bottom left.
for(ix=0;ix<sampleRectWidth;ix++){
for(iy=0;iy<sampleRectHeight;iy++){
// Compute write-indices for returned data:
redReturnIndex=PsychIndexElementFrom3DArray(sampleRectHeight, sampleRectWidth, nrchannels, iy, ix, 0);
greenReturnIndex=PsychIndexElementFrom3DArray(sampleRectHeight, sampleRectWidth, nrchannels, iy, ix, 1);
blueReturnIndex=PsychIndexElementFrom3DArray(sampleRectHeight, sampleRectWidth, nrchannels, iy, ix, 2);
alphaReturnIndex=PsychIndexElementFrom3DArray(sampleRectHeight, sampleRectWidth, nrchannels, iy, ix, 3);
// Always return RED/LUMINANCE channel:
returnArrayBaseDouble[redReturnIndex]=dredPlane[(ix + ((sampleRectHeight-1) - iy ) * sampleRectWidth) * nrchannels + 0];
// Other channels on demand:
if (nrchannels>1) returnArrayBaseDouble[greenReturnIndex]=dredPlane[(ix + ((sampleRectHeight-1) - iy ) * sampleRectWidth) * nrchannels + 1];
if (nrchannels>2) returnArrayBaseDouble[blueReturnIndex]=dredPlane[(ix + ((sampleRectHeight-1) - iy ) * sampleRectWidth) * nrchannels + 2];
if (nrchannels>3) returnArrayBaseDouble[alphaReturnIndex]=dredPlane[(ix + ((sampleRectHeight-1) - iy ) * sampleRectWidth) * nrchannels + 3];
}
}
}
if (viewid == -1) {
// Need to reset framebuffer binding to get rid of the inputBufferFBO which is bound due to
// multisample resolve ops --> Activate system framebuffer:
PsychSetDrawingTarget(NULL);
}
return(PsychError_none);
}
PsychError SCREENPreference(void)
{
PsychArgFormatType arg1Type;
char *preferenceName, *newFontName;
const char *tableCreator, *oldDefaultFontName;
psych_bool preferenceNameArgumentValid, booleanInput, ignoreCase, tempFlag, textAlphaBlendingFlag, suppressAllWarningsFlag;
int numInputArgs, i, newFontStyleNumber, newFontSize, tempInt, tempInt2, tempInt3, tempInt4;
double returnDoubleValue, inputDoubleValue;
double maxStddev, maxDeviation, maxDuration;
int minSamples;
double *dheads = NULL;
//all sub functions should have these two lines
PsychPushHelp(useString, synopsisString,seeAlsoString);
if(PsychIsGiveHelp()){PsychGiveHelp();return(PsychError_none);};
//check for superfluous or missing arguments
PsychErrorExit(PsychCapNumInputArgs(5));
PsychErrorExit(PsychRequireNumInputArgs(1));
PsychErrorExit(PsychCapNumOutputArgs(4));
numInputArgs=PsychGetNumInputArgs();
arg1Type=PsychGetArgType(1);
preferenceNameArgumentValid=FALSE;
//Cases which require both a window pointer or screen number and preference name. Argument 1 is the wposn and argument 2 is the preference name.
if( numInputArgs >= 2 && (PsychIsScreenNumberArg(1) || PsychIsScreenNumberArg(1)) && PsychGetArgType(2)==PsychArgType_char ){
PsychAllocInCharArg(2, kPsychArgRequired, &preferenceName);
//preferences which require window pointer or screen number argument which we DO NOT support
for(i=0;i<kPsychNumUnsupportedMacVideoPreferences;i++){
if(PsychMatch(preferenceName, unsupportedMacVideoPreferenceNames[i]))
PsychErrorExit(PsychError_unsupportedOS9Preference);
}
//insert here conditionals to act on prefernces which accept a window pointer or screen number argument which we DO support.
PsychErrorExit(PsychError_unrecognizedPreferenceName);
}
//Cases which do not require a wposn. Argument 1 is the preference name. if present Argument 2 is the new value
if(arg1Type==PsychArgType_char){
PsychAllocInCharArg(1, kPsychArgRequired, &preferenceName);
//Preferernces which we do not support and which do not require a wposn
for(i=0;i<kPsychNumUnsupportedMacNonVideoPreferences;i++){
if(PsychMatch(preferenceName, unsupportedMacNonVideoPreferenceNames[i]))
PsychErrorExit(PsychError_unsupportedOS9Preference);
}
//Preferences which we do support
if(PsychMatch(preferenceName, "IgnoreCase")){
ignoreCase=!PsychIsPsychMatchCaseSensitive();
PsychCopyOutFlagArg(1, kPsychArgOptional, ignoreCase);
if(numInputArgs==2){
PsychCopyInFlagArg(2, kPsychArgRequired, &booleanInput);
PsychSetPsychMatchCaseSenstive(!booleanInput);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "Tick0Secs")){
if(PsychCopyInDoubleArg(2, kPsychArgOptional, &inputDoubleValue) && inputDoubleValue==PsychGetNanValue())
PsychEstimateGetSecsValueAtTickCountZero();
returnDoubleValue=PsychGetEstimatedSecsValueAtTickCountZero();
PsychCopyOutDoubleArg(1, kPsychArgOptional, returnDoubleValue);
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "PsychTableVersion")){
if(numInputArgs==2)
PsychErrorExit(PsychError_extraInputArg);
PsychCopyOutDoubleArg(1, kPsychArgOptional, (double)PsychPrefStateGet_PsychTableVersion());
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "PsychTableCreator")){
if(numInputArgs==2)
PsychErrorExit(PsychError_extraInputArg);
tableCreator=PsychPrefStateGet_PsychTableCreator();
PsychCopyOutCharArg(1, kPsychArgOptional, tableCreator);
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "Process")){
if(numInputArgs==2)
PsychErrorExit(PsychError_extraInputArg);
PsychCopyOutDoubleArg(1, kPsychArgOptional, (double) (psych_int64) getpid());
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "DefaultFontName")){
PsychPrefStateGet_DefaultFontName(&oldDefaultFontName);
PsychCopyOutCharArg(1, kPsychArgOptional, oldDefaultFontName);
if(numInputArgs==2){
PsychAllocInCharArg(2, kPsychArgRequired, &newFontName);
PsychPrefStateSet_DefaultFontName(newFontName);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "TextEncodingLocale")){
PsychCopyOutCharArg(1, kPsychArgOptional, PsychGetUnicodeTextConversionLocale());
if(numInputArgs==2){
PsychAllocInCharArg(2, kPsychArgRequired, &newFontName);
if (!PsychSetUnicodeTextConversionLocale(newFontName)) PsychErrorExitMsg(PsychError_user, "Setting the 'TextEncodingLocale' failed, most likely because you provided an invalid/unknown locale setting string.");
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "DefaultFontStyle")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_DefaultTextStyle());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &newFontStyleNumber);
PsychPrefStateSet_DefaultTextStyle(newFontStyleNumber);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "OverrideMultimediaEngine")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_UseGStreamer());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_UseGStreamer(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "DefaultTextYPositionIsBaseline")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_TextYPositionIsBaseline());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_TextYPositionIsBaseline(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "TextAntiAliasing")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_TextAntiAliasing());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_TextAntiAliasing(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "TextRenderer")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_TextRenderer());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_TextRenderer(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "DefaultFontSize")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_DefaultTextSize());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &newFontSize);
PsychPrefStateSet_DefaultTextSize(newFontSize);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "DebugMakeTexture")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_DebugMakeTexture());
if(numInputArgs==2){
PsychCopyInFlagArg(2, kPsychArgRequired, &tempFlag);
PsychPrefStateSet_DebugMakeTexture(tempFlag);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "SkipSyncTests")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_SkipSyncTests());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_SkipSyncTests(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "VisualDebugLevel")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_VisualDebugLevel());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_VisualDebugLevel(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "VBLTimestampingMode")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_VBLTimestampingMode());
if(numInputArgs>=2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_VBLTimestampingMode(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "SyncTestSettings")){
PsychPrefStateGet_SynctestThresholds(&maxStddev, &minSamples, &maxDeviation, &maxDuration);
PsychCopyOutDoubleArg(1, kPsychArgOptional, maxStddev);
PsychCopyOutDoubleArg(2, kPsychArgOptional, minSamples);
PsychCopyOutDoubleArg(3, kPsychArgOptional, maxDeviation);
PsychCopyOutDoubleArg(4, kPsychArgOptional, maxDuration);
if(numInputArgs>=2){
PsychCopyInDoubleArg( 2, kPsychArgOptional, &maxStddev);
PsychCopyInIntegerArg(3, kPsychArgOptional, &minSamples);
PsychCopyInDoubleArg( 4, kPsychArgOptional, &maxDeviation);
PsychCopyInDoubleArg( 5, kPsychArgOptional, &maxDuration);
PsychPrefStateSet_SynctestThresholds(maxStddev, minSamples, maxDeviation, maxDuration);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "VBLEndlineOverride")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_VBLEndlineOverride());
if(numInputArgs>=2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_VBLEndlineOverride(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "DefaultVideocaptureEngine")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_VideoCaptureEngine());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_VideoCaptureEngine(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "WindowShieldingLevel")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_WindowShieldingLevel());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_WindowShieldingLevel(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "ConserveVRAM") || PsychMatch(preferenceName, "Workarounds1")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_ConserveVRAM());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_ConserveVRAM(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "Verbosity")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_Verbosity());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_Verbosity(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "FrameRectCorrection")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_FrameRectCorrection());
if(numInputArgs==2){
PsychCopyInDoubleArg(2, kPsychArgRequired, &inputDoubleValue);
PsychPrefStateSet_FrameRectCorrection(inputDoubleValue);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "EmulateOldPTB")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_EmulateOldPTB());
if(numInputArgs==2){
PsychCopyInFlagArg(2, kPsychArgRequired, &tempFlag);
PsychPrefStateSet_EmulateOldPTB(tempFlag);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "Enable3DGraphics")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_3DGfx());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_3DGfx(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "TextAlphaBlending")){
textAlphaBlendingFlag=PsychPrefStateGet_TextAlphaBlending();
PsychCopyOutFlagArg(1, kPsychArgOptional, textAlphaBlendingFlag);
if(numInputArgs==2){
PsychCopyInFlagArg(2, kPsychArgRequired, &booleanInput);
PsychPrefStateSet_TextAlphaBlending(booleanInput);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "SuppressAllWarnings")){
suppressAllWarningsFlag=PsychPrefStateGet_SuppressAllWarnings();
PsychCopyOutFlagArg(1, kPsychArgOptional, suppressAllWarningsFlag);
if(numInputArgs==2){
PsychCopyInFlagArg(2, kPsychArgRequired, &booleanInput);
PsychPrefStateSet_SuppressAllWarnings(booleanInput);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "SynchronizeDisplays")){
if(numInputArgs >= 2) {
// This is a special call: It currently doesn't set a preference setting,
// but instead triggers an instantaneous synchronization of all available
// display heads, if possible. We may have a more clever and "standard" interface
// interface for this later on, but for first tests this will do.
// Syncmethod is hard-coded to 0 -> Use whatever's available to sync.
// timeout for retries is 5.0 seconds.
// Acceptable residual offset is +/- 2 scanlines.
// Returns the real residual offset after sync.
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
if (!PsychCopyInIntegerArg(3, kPsychArgOptional, &tempInt3)) {
// No screenId specified: Resync default screen or whatever...
tempInt2 = 0;
if (PsychSynchronizeDisplayScreens(&tempInt2, NULL, &tempInt, tempInt, 5.0, 2)!=PsychError_none) PsychErrorExitMsg(PsychError_user, "Sync failed for reasons mentioned above.");
} else {
// Specific screenId provided: Resync crtc's associated with this screenId if possible:
tempInt2 = 1;
if (PsychSynchronizeDisplayScreens(&tempInt2, &tempInt3, &tempInt, tempInt, 5.0, 2)!=PsychError_none) PsychErrorExitMsg(PsychError_user, "Sync failed for reasons mentioned above.");
}
PsychCopyOutDoubleArg(1, kPsychArgOptional, tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "ScreenToHead")){
// screenId is required:
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
if (tempInt < 0 || tempInt >= PsychGetNumDisplays() || tempInt >= kPsychMaxPossibleDisplays) PsychErrorExitMsg(PsychError_user, "Invalid screenId provided. Out of valid range!");
// Return old mappings for this screenId:
for (tempInt2 = 0; (tempInt2 < kPsychMaxPossibleCrtcs) && (PsychPrefStateGet_ScreenToHead(tempInt, tempInt2) >= 0); tempInt2++);
PsychAllocOutDoubleMatArg(1, kPsychArgOptional, 2, tempInt2, 1, &dheads);
tempInt4 = 0;
for (tempInt3 = 0; tempInt3 < tempInt2; tempInt3++) {
dheads[tempInt4++] = (double) PsychPrefStateGet_ScreenToHead(tempInt, tempInt3);
dheads[tempInt4++] = (double) PsychPrefStateGet_ScreenToCrtcId(tempInt, tempInt3);
}
// Optionally retrieve and set new mappings for this screenId:
if(numInputArgs>=3) {
// Set new headId for screenId:
PsychCopyInIntegerArg(3, kPsychArgRequired, &tempInt2);
if (tempInt2 < 0) PsychErrorExitMsg(PsychError_user, "Invalid negative headId provided!");
// Set new crtcId for screenId:
PsychCopyInIntegerArg(4, kPsychArgRequired, &tempInt3);
if (tempInt3 < 0) PsychErrorExitMsg(PsychError_user, "Invalid negative crtcId provided!");
// Assign primary head by default (index 0), but allow optionally others as well:
tempInt4 = 0;
PsychCopyInIntegerArg(5, kPsychArgOptional, &tempInt4);
if (tempInt4 < 0 || tempInt4 >= kPsychMaxPossibleCrtcs) PsychErrorExitMsg(PsychError_user, "Invalid rankId provided! Too many heads for one screen!");
PsychPrefStateSet_ScreenToHead(tempInt, tempInt2, tempInt3, tempInt4);
}
preferenceNameArgumentValid=TRUE;
}else
PsychErrorExit(PsychError_unrecognizedPreferenceName);
}
if(!preferenceNameArgumentValid)
PsychErrorExitMsg(PsychError_user, "Invalid arguments to preferences command");
return(PsychError_none);
}
PsychError SCREENDrawDots(void)
{
PsychWindowRecordType *windowRecord, *parentWindowRecord;
int m,n,p,mc,nc,idot_type;
int i, nrpoints, nrsize;
psych_bool isArgThere, usecolorvector, isdoublecolors, isuint8colors;
double *xy, *size, *center, *dot_type, *colors;
float *sizef;
unsigned char *bytecolors;
GLfloat pointsizerange[2];
psych_bool lenient = FALSE;
psych_bool usePointSizeArray = FALSE;
static psych_bool nocando = FALSE;
int oldverbosity;
// All sub functions should have these two lines
PsychPushHelp(useString, synopsisString,seeAlsoString);
if(PsychIsGiveHelp()){PsychGiveHelp();return(PsychError_none);};
// Check for superfluous arguments
PsychErrorExit(PsychCapNumInputArgs(7)); //The maximum number of inputs
PsychErrorExit(PsychCapNumOutputArgs(4)); //The maximum number of outputs
// Get the window record from the window record argument and get info from the window record
PsychAllocInWindowRecordArg(1, kPsychArgRequired, &windowRecord);
// Get dot_type argument, if any, as it is already needed for a pure point size range query below:
isArgThere = PsychIsArgPresent(PsychArgIn, 6);
if(!isArgThere){
idot_type = 0;
} else {
PsychAllocInDoubleMatArg(6, TRUE, &m, &n, &p, &dot_type);
if(p != 1 || n != 1 || m != 1 || (dot_type[0] < 0 || dot_type[0] > 4))
PsychErrorExitMsg(PsychError_user, "dot_type must be 0, 1, 2, 3 or 4");
idot_type = (int) dot_type[0];
}
// Query for supported point size range?
if (PsychGetNumOutputArgs() > 0) {
PsychSetDrawingTarget(windowRecord);
// Always query and return aliased range:
glGetFloatv(GL_ALIASED_POINT_SIZE_RANGE, (GLfloat*) &pointsizerange);
PsychCopyOutDoubleArg(3, FALSE, (double) pointsizerange[0]);
PsychCopyOutDoubleArg(4, FALSE, (double) pointsizerange[1]);
// If driver supports smooth points and usercode doesn't specify a dot type (idot_type 0)
// or does not request shader + point-sprite based drawing then return smooth point
// size range as "smooth point size range" - query and assign it. Otherwise, ie., code
// explicitely wants to use a shader (idot_type >= 3) or has to use one, we will use
// point-sprites and that means the GL_ALIASED_POINT_SIZE_RANGE limits apply also to
// our shader based smooth dots, so return those:
if ((windowRecord->gfxcaps & kPsychGfxCapSmoothPrimitives) && (idot_type < 3))
glGetFloatv(GL_POINT_SIZE_RANGE, (GLfloat*) &pointsizerange);
// Whatever the final choice for smooth dots is, return its limits:
PsychCopyOutDoubleArg(1, FALSE, (double) pointsizerange[0]);
PsychCopyOutDoubleArg(2, FALSE, (double) pointsizerange[1]);
// If this was only a query then we are done:
if (PsychGetNumInputArgs() < 2)
return(PsychError_none);
}
// Query, allocate and copy in all vectors...
nrpoints = 2;
nrsize = 0;
colors = NULL;
bytecolors = NULL;
PsychPrepareRenderBatch(windowRecord, 2, &nrpoints, &xy, 4, &nc, &mc, &colors, &bytecolors, 3, &nrsize, &size, (GL_FLOAT == PsychGLFloatType(windowRecord)));
isdoublecolors = (colors) ? TRUE:FALSE;
isuint8colors = (bytecolors) ? TRUE:FALSE;
usecolorvector = (nc>1) ? TRUE:FALSE;
// Assign sizef as float-type array of sizes, if float mode active, NULL otherwise:
sizef = (GL_FLOAT == PsychGLFloatType(windowRecord)) ? (float*) size : NULL;
// Get center argument
isArgThere = PsychIsArgPresent(PsychArgIn, 5);
if(!isArgThere){
center = (double *) PsychMallocTemp(2 * sizeof(double));
center[0] = 0;
center[1] = 0;
} else {
PsychAllocInDoubleMatArg(5, TRUE, &m, &n, &p, ¢er);
if(p!=1 || n!=2 || m!=1) PsychErrorExitMsg(PsychError_user, "center must be a 1-by-2 vector");
}
// Turn on antialiasing to draw circles? Or idot_type 4 for shader based square dots?
if (idot_type) {
// Smooth point rendering supported by gfx-driver and hardware? And user does not request our own stuff?
if ((idot_type == 3) || (idot_type == 4) || !(windowRecord->gfxcaps & kPsychGfxCapSmoothPrimitives)) {
// No. Need to roll our own shader + point sprite solution.
if (!windowRecord->smoothPointShader && !nocando) {
parentWindowRecord = PsychGetParentWindow(windowRecord);
if (!parentWindowRecord->smoothPointShader) {
// Build and assign shader to parent window, but allow this to silently fail:
oldverbosity = PsychPrefStateGet_Verbosity();
PsychPrefStateSet_Verbosity(0);
parentWindowRecord->smoothPointShader = PsychCreateGLSLProgram(PointSmoothFragmentShaderSrc, PointSmoothVertexShaderSrc, NULL);
PsychPrefStateSet_Verbosity(oldverbosity);
}
if (parentWindowRecord->smoothPointShader) {
// Got one compiled - assign it for use:
windowRecord->smoothPointShader = parentWindowRecord->smoothPointShader;
}
else {
// Failed. Record this failure so we can avoid retrying at next DrawDots invocation:
nocando = TRUE;
}
}
if (windowRecord->smoothPointShader) {
// Activate point smooth shader, and point sprite operation on texunit 1 for coordinates on set 1:
PsychSetShader(windowRecord, windowRecord->smoothPointShader);
glActiveTexture(GL_TEXTURE1);
glTexEnvi(GL_POINT_SPRITE, GL_COORD_REPLACE, GL_TRUE);
glActiveTexture(GL_TEXTURE0);
glEnable(GL_POINT_SPRITE);
// Tell shader from where to get its color information: Unclamped high precision colors from texture coordinate set 0, or regular colors from vertex color attribute?
glUniform1i(glGetUniformLocation(windowRecord->smoothPointShader, "useUnclampedFragColor"), (windowRecord->defaultDrawShader) ? 1 : 0);
// Tell shader if it should shade smooth round dots, or square dots:
glUniform1i(glGetUniformLocation(windowRecord->smoothPointShader, "drawRoundDots"), (idot_type != 4) ? 1 : 0);
// Tell shader about current point size in pointSize uniform:
glEnable(GL_PROGRAM_POINT_SIZE);
usePointSizeArray = TRUE;
}
else if (idot_type != 4) {
// Game over for round dot drawing:
PsychErrorExitMsg(PsychError_user, "Point smoothing unsupported on your system and our shader based implementation failed as well in Screen('DrawDots').");
}
else {
// Type 4 requested but unsupported. Fallback to type 0, which is the same, just slower:
idot_type = 0;
}
// Request square dots, without anti-aliasing: Better compatibility with
// shader + point sprite operation, and needed for idot_type 0 fallback.
glDisable(GL_POINT_SMOOTH);
glGetFloatv(GL_ALIASED_POINT_SIZE_RANGE, (GLfloat*) &pointsizerange);
}
else {
// User wants hw anti-aliased round smooth dots (idot_type = 1 or 2) and
// hardware + driver support this. Request smooth points from hardware:
glEnable(GL_POINT_SMOOTH);
glGetFloatv(GL_POINT_SIZE_RANGE, (GLfloat*) &pointsizerange);
// A dot type of 2 requests highest quality point smoothing:
glHint(GL_POINT_SMOOTH_HINT, (idot_type > 1) ? GL_NICEST : GL_DONT_CARE);
}
}
else {
glDisable(GL_POINT_SMOOTH);
glGetFloatv(GL_ALIASED_POINT_SIZE_RANGE, (GLfloat*) &pointsizerange);
}
// Does ES-GPU only support a fixed point diameter of 1 pixel?
if ((pointsizerange[1] <= 1) && PsychIsGLES(windowRecord)) {
// Yes. Not much point bailing on this, as it should be easily visible
// during testing of a studies code on a OpenGL-ES device.
lenient = TRUE;
}
// Accept optional 'lenient' flag, if provided:
PsychCopyInFlagArg(7, FALSE, &lenient);
// Set size of a single dot:
if (!lenient && ((sizef && (sizef[0] > pointsizerange[1] || sizef[0] < pointsizerange[0])) ||
(!sizef && (size[0] > pointsizerange[1] || size[0] < pointsizerange[0])))) {
printf("PTB-ERROR: You requested a point size of %f units, which is not in the range (%f to %f) supported by your graphics hardware.\n",
(sizef) ? sizef[0] : size[0], pointsizerange[0], pointsizerange[1]);
PsychErrorExitMsg(PsychError_user, "Unsupported point size requested in Screen('DrawDots').");
}
// Setup initial common point size for all points:
if (!usePointSizeArray) glPointSize((sizef) ? sizef[0] : (float) size[0]);
if (usePointSizeArray) glMultiTexCoord1f(GL_TEXTURE2, (sizef) ? sizef[0] : (float) size[0]);
// Setup modelview matrix to perform translation by 'center':
glMatrixMode(GL_MODELVIEW);
// Make a backup copy of the matrix:
glPushMatrix();
// Apply a global translation of (center(x,y)) pixels to all following points:
glTranslatef((float) center[0], (float) center[1], 0);
// Render the array of 2D-Points - Efficient version:
// This command sequence allows fast processing of whole arrays
// of vertices (or points, in this case). It saves the call overhead
// associated with the original implementation below and is potentially
// optimized in specific OpenGL implementations.
// Pass a pointer to the start of the point-coordinate array:
glVertexPointer(2, PSYCHGLFLOAT, 0, &xy[0]);
// Enable fast rendering of arrays:
glEnableClientState(GL_VERTEX_ARRAY);
if (usecolorvector) {
PsychSetupVertexColorArrays(windowRecord, TRUE, mc, colors, bytecolors);
}
// Render all n points, starting at point 0, render them as POINTS:
if ((nrsize == 1) || usePointSizeArray) {
// Only one common size provided, or efficient shader based
// path in use. We can use the fast path of only submitting
// one glDrawArrays call to draw all GL_POINTS. For a single
// common size, no further setup is needed.
if (nrsize > 1) {
// Individual size for each dot provided. Setup texture unit 2
// with a 1D texcoord array that stores per point size info in
// texture coordinate set 2. But first validate point sizes:
for (i = 0; i < nrpoints; i++) {
if (!lenient && ((sizef && (sizef[i] > pointsizerange[1] || sizef[i] < pointsizerange[0])) ||
(!sizef && (size[i] > pointsizerange[1] || size[i] < pointsizerange[0])))) {
printf("PTB-ERROR: You requested a point size of %f units, which is not in the range (%f to %f) supported by your graphics hardware.\n",
(sizef) ? sizef[i] : size[i], pointsizerange[0], pointsizerange[1]);
PsychErrorExitMsg(PsychError_user, "Unsupported point size requested in Screen('DrawDots').");
}
}
// Sizes are fine, setup texunit 2:
glClientActiveTexture(GL_TEXTURE2);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glTexCoordPointer(1, (sizef) ? GL_FLOAT : GL_DOUBLE, 0, (sizef) ? (const GLvoid*) sizef : (const GLvoid*) size);
}
// Draw all points:
glDrawArrays(GL_POINTS, 0, nrpoints);
if (nrsize > 1) {
// Individual size for each dot provided. Reset texture unit 2:
glTexCoordPointer(1, (sizef) ? GL_FLOAT : GL_DOUBLE, 0, (const GLvoid*) NULL);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
// Back to default texunit 0:
glClientActiveTexture(GL_TEXTURE0);
}
}
else {
// Different size for each dot provided and we can't use our shader based implementation:
// We have to do One GL - call per dot:
for (i=0; i<nrpoints; i++) {
if (!lenient && ((sizef && (sizef[i] > pointsizerange[1] || sizef[i] < pointsizerange[0])) ||
(!sizef && (size[i] > pointsizerange[1] || size[i] < pointsizerange[0])))) {
printf("PTB-ERROR: You requested a point size of %f units, which is not in the range (%f to %f) supported by your graphics hardware.\n",
(sizef) ? sizef[i] : size[i], pointsizerange[0], pointsizerange[1]);
PsychErrorExitMsg(PsychError_user, "Unsupported point size requested in Screen('DrawDots').");
}
// Setup point size for this point:
if (!usePointSizeArray) glPointSize((sizef) ? sizef[i] : (float) size[i]);
// Render point:
glDrawArrays(GL_POINTS, i, 1);
}
}
// Disable fast rendering of arrays:
glDisableClientState(GL_VERTEX_ARRAY);
glVertexPointer(2, PSYCHGLFLOAT, 0, NULL);
if (usecolorvector) PsychSetupVertexColorArrays(windowRecord, FALSE, 0, NULL, NULL);
// Restore old matrix from backup copy, undoing the global translation:
glPopMatrix();
// turn off antialiasing again
if (idot_type) {
glDisable(GL_POINT_SMOOTH);
if (windowRecord->smoothPointShader) {
// Deactivate point smooth shader and point sprite operation on texunit 1:
PsychSetShader(windowRecord, 0);
glActiveTexture(GL_TEXTURE1);
glTexEnvi(GL_POINT_SPRITE, GL_COORD_REPLACE, GL_FALSE);
glActiveTexture(GL_TEXTURE0);
glDisable(GL_POINT_SPRITE);
glDisable(GL_PROGRAM_POINT_SIZE);
}
}
// Reset pointsize to 1.0
glPointSize(1);
// Mark end of drawing op. This is needed for single buffered drawing:
PsychFlushGL(windowRecord);
//All psychfunctions require this.
return(PsychError_none);
}
PsychError SCREENPreference(void)
{
PsychArgFormatType arg1Type;
char *preferenceName, *newFontName;
const char *tableCreator, *oldDefaultFontName;
Boolean preferenceNameArgumentValid, booleanInput, ignoreCase, tempFlag, textAlphaBlendingFlag, suppressAllWarningsFlag;
int numInputArgs, i, newFontStyleNumber, newFontSize, tempInt, tempInt2, tempInt3;
double returnDoubleValue, inputDoubleValue;
//all sub functions should have these two lines
PsychPushHelp(useString, synopsisString,seeAlsoString);
if(PsychIsGiveHelp()){PsychGiveHelp();return(PsychError_none);};
//check for superfluous or missing arguments
PsychErrorExit(PsychCapNumInputArgs(3));
PsychErrorExit(PsychRequireNumInputArgs(1));
PsychErrorExit(PsychCapNumOutputArgs(1));
numInputArgs=PsychGetNumInputArgs();
arg1Type=PsychGetArgType(1);
preferenceNameArgumentValid=FALSE;
//Cases which require both a window pointer or screen number and preference name. Argument 1 is the wposn and argument 2 is the preference name.
if( numInputArgs >= 2 && (PsychIsScreenNumberArg(1) || PsychIsScreenNumberArg(1)) && PsychGetArgType(2)==PsychArgType_char ){
PsychAllocInCharArg(2, kPsychArgRequired, &preferenceName);
//preferences which require window pointer or screen number argument which we DO NOT support
for(i=0;i<kPsychNumUnsupportedMacVideoPreferences;i++){
if(PsychMatch(preferenceName, unsupportedMacVideoPreferenceNames[i]))
PsychErrorExit(PsychError_unsupportedOS9Preference);
}
//insert here conditionals to act on prefernces which accept a window pointer or screen number argument which we DO support.
PsychErrorExit(PsychError_unrecognizedPreferenceName);
}
//Cases which do not require a wposn. Argument 1 is the preference name. if present Argument 2 is the new value
if(arg1Type==PsychArgType_char){
PsychAllocInCharArg(1, kPsychArgRequired, &preferenceName);
//Preferernces which we do not support and which do not require a wposn
for(i=0;i<kPsychNumUnsupportedMacNonVideoPreferences;i++){
if(PsychMatch(preferenceName, unsupportedMacNonVideoPreferenceNames[i]))
PsychErrorExit(PsychError_unsupportedOS9Preference);
}
//Preferences which we do support
if(PsychMatch(preferenceName, "IgnoreCase")){
ignoreCase=!PsychIsPsychMatchCaseSensitive();
PsychCopyOutFlagArg(1, kPsychArgOptional, ignoreCase);
if(numInputArgs==2){
PsychCopyInFlagArg(2, kPsychArgRequired, &booleanInput);
PsychSetPsychMatchCaseSenstive(!booleanInput);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "Tick0Secs")){
if(PsychCopyInDoubleArg(2, kPsychArgOptional, &inputDoubleValue) && inputDoubleValue==PsychGetNanValue())
PsychEstimateGetSecsValueAtTickCountZero();
returnDoubleValue=PsychGetEstimatedSecsValueAtTickCountZero();
PsychCopyOutDoubleArg(1, kPsychArgOptional, returnDoubleValue);
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "PsychTableVersion")){
if(numInputArgs==2)
PsychErrorExit(PsychError_extraInputArg);
PsychCopyOutDoubleArg(1, kPsychArgOptional, (double)PsychPrefStateGet_PsychTableVersion());
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "PsychTableCreator")){
if(numInputArgs==2)
PsychErrorExit(PsychError_extraInputArg);
tableCreator=PsychPrefStateGet_PsychTableCreator();
PsychCopyOutCharArg(1, kPsychArgOptional, tableCreator);
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "Process")){
if(numInputArgs==2)
PsychErrorExit(PsychError_extraInputArg);
PsychCopyOutDoubleArg(1, kPsychArgOptional, (double)getpid());
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "DefaultFontName")){
PsychPrefStateGet_DefaultFontName(&oldDefaultFontName);
PsychCopyOutCharArg(1, kPsychArgOptional, oldDefaultFontName);
if(numInputArgs==2){
PsychAllocInCharArg(2, kPsychArgRequired, &newFontName);
PsychPrefStateSet_DefaultFontName(newFontName);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "DefaultFontStyle")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_DefaultTextStyle());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &newFontStyleNumber);
PsychPrefStateSet_DefaultTextStyle(newFontStyleNumber);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "DefaultTextYPositionIsBaseline")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_TextYPositionIsBaseline());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_TextYPositionIsBaseline(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "TextAntiAliasing")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_TextAntiAliasing());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_TextAntiAliasing(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "TextRenderer")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_TextRenderer());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_TextRenderer(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "DefaultFontSize")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_DefaultTextSize());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &newFontSize);
PsychPrefStateSet_DefaultTextSize(newFontSize);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "DebugMakeTexture")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_DebugMakeTexture());
if(numInputArgs==2){
PsychCopyInFlagArg(2, kPsychArgRequired, &tempFlag);
PsychPrefStateSet_DebugMakeTexture(tempFlag);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "SkipSyncTests")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_SkipSyncTests());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_SkipSyncTests(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "VisualDebugLevel")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_VisualDebugLevel());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_VisualDebugLevel(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "VBLTimestampingMode")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_VBLTimestampingMode());
if(numInputArgs>=2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_VBLTimestampingMode(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "VBLEndlineOverride")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_VBLEndlineOverride());
if(numInputArgs>=2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_VBLEndlineOverride(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "DefaultVideocaptureEngine")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_VideoCaptureEngine());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_VideoCaptureEngine(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "ConserveVRAM") || PsychMatch(preferenceName, "Workarounds1")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_ConserveVRAM());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_ConserveVRAM(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "Verbosity")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_Verbosity());
if(numInputArgs==2){
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
PsychPrefStateSet_Verbosity(tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "EmulateOldPTB")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_EmulateOldPTB());
if(numInputArgs==2){
PsychCopyInFlagArg(2, kPsychArgRequired, &tempFlag);
PsychPrefStateSet_EmulateOldPTB(tempFlag);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "Enable3DGraphics")){
PsychCopyOutDoubleArg(1, kPsychArgOptional, PsychPrefStateGet_3DGfx());
if(numInputArgs==2){
PsychCopyInFlagArg(2, kPsychArgRequired, &tempFlag);
PsychPrefStateSet_3DGfx(tempFlag);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "TextAlphaBlending")){
textAlphaBlendingFlag=PsychPrefStateGet_TextAlphaBlending();
PsychCopyOutFlagArg(1, kPsychArgOptional, textAlphaBlendingFlag);
if(numInputArgs==2){
PsychCopyInFlagArg(2, kPsychArgRequired, &booleanInput);
PsychPrefStateSet_TextAlphaBlending(booleanInput);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "SuppressAllWarnings")){
suppressAllWarningsFlag=PsychPrefStateGet_SuppressAllWarnings();
PsychCopyOutFlagArg(1, kPsychArgOptional, suppressAllWarningsFlag);
if(numInputArgs==2){
PsychCopyInFlagArg(2, kPsychArgRequired, &booleanInput);
PsychPrefStateSet_SuppressAllWarnings(booleanInput);
}
preferenceNameArgumentValid=TRUE;
}else
if(PsychMatch(preferenceName, "SynchronizeDisplays")){
if(numInputArgs==2){
// This is a special call: It currently doesn't set a preference setting,
// but instead triggers an instantaneous synchronization of all available
// display heads, if possible. We may have a more clever and "standard" interface
// interface for this later on, but for first tests this will do.
// Syncmethod is hard-coded to 0 -> Use whatever's available to sync.
// timeout for retries is 5.0 seconds.
// Acceptable residual offset is +/- 2 scanlines.
// Returns the real residual offset after sync.
PsychCopyInIntegerArg(2, kPsychArgRequired, &tempInt);
tempInt2 = 0;
if (PsychSynchronizeDisplayScreens(&tempInt2, NULL, &tempInt, tempInt, 5.0, 2)!=PsychError_none) PsychErrorExitMsg(PsychError_user, "Sync failed for reasons mentioned above.");
PsychCopyOutDoubleArg(1, kPsychArgOptional, tempInt);
}
preferenceNameArgumentValid=TRUE;
}else
PsychErrorExit(PsychError_unrecognizedPreferenceName);
}
if(!preferenceNameArgumentValid)
PsychErrorExitMsg(PsychError_user, "Invalid arguments to preferences command");
return(PsychError_none);
}
// This also works as 'AddFrameToMovie', as almost all code is shared with 'GetImage'.
// Only difference is where the fetched pixeldata is sent: To the movie encoder or to
// a matlab/octave matrix.
PsychError SCREENGetImage(void)
{
PsychRectType windowRect, sampleRect;
int nrchannels, invertedY, stride;
size_t ix, iy, sampleRectWidth, sampleRectHeight, redReturnIndex, greenReturnIndex, blueReturnIndex, alphaReturnIndex, planeSize;
int viewid = 0;
psych_uint8 *returnArrayBase, *redPlane;
float *dredPlane;
double *returnArrayBaseDouble;
PsychWindowRecordType *windowRecord;
GLboolean isDoubleBuffer, isStereo;
char* buffername = NULL;
psych_bool floatprecision = FALSE;
GLenum whichBuffer = 0;
int frameduration = 1;
int moviehandle = 0;
unsigned int twidth, theight, numChannels, bitdepth;
unsigned char* framepixels;
psych_bool isOES;
// Called as 2nd personality "AddFrameToMovie" ?
psych_bool isAddMovieFrame = PsychMatch(PsychGetFunctionName(), "AddFrameToMovie");
// All sub functions should have these two lines
if (isAddMovieFrame) {
PsychPushHelp(useString2, synopsisString2, seeAlsoString);
}
else {
PsychPushHelp(useString, synopsisString, seeAlsoString);
}
if(PsychIsGiveHelp()){PsychGiveHelp();return(PsychError_none);};
//cap the numbers of inputs and outputs
PsychErrorExit(PsychCapNumInputArgs(5)); //The maximum number of inputs
PsychErrorExit(PsychCapNumOutputArgs(1)); //The maximum number of outputs
// Get windowRecord for this window:
PsychAllocInWindowRecordArg(kPsychUseDefaultArgPosition, TRUE, &windowRecord);
// Embedded subset has very limited support for readback formats :
isOES = PsychIsGLES(windowRecord);
// Make sure we don't execute on an onscreen window with pending async flip, as this would interfere
// by touching the system backbuffer -> Impaired timing of the flip thread and undefined readback
// of image data due to racing with the ops of the flipperthread on the same drawable.
//
// Note: It would be possible to allow drawBuffer readback if the drawBuffer is not multi-sampled
// or if we can safely multisample-resolve without touching the backbuffer, but checking for all
// special cases adds ugly complexity and is not really worth the effort, so we don't allow this.
//
// If this passes then PsychSetDrawingTarget() below will trigger additional validations to check
// if execution of 'GetImage' is allowed under the current conditions for offscreen windows and
// textures:
if (PsychIsOnscreenWindow(windowRecord) && (windowRecord->flipInfo->asyncstate > 0)) {
PsychErrorExitMsg(PsychError_user, "Calling this function on an onscreen window with a pending asynchronous flip is not allowed!");
}
// Set window as drawingtarget: Even important if this binding is changed later on!
// We need to make sure all needed transitions are done - esp. in non-imaging mode,
// so backbuffer is in a useable state:
PsychSetDrawingTarget(windowRecord);
// Disable shaders:
PsychSetShader(windowRecord, 0);
// Soft-Reset drawingtarget. This is important to make sure no FBO's are bound,
// otherwise the following glGets for GL_DOUBLEBUFFER and GL_STEREO will retrieve
// wrong results, leading to totally wrong read buffer assignments down the road!!
PsychSetDrawingTarget((PsychWindowRecordType*) 0x1);
// Queries only available on desktop OpenGL:
if (!isOES) {
glGetBooleanv(GL_DOUBLEBUFFER, &isDoubleBuffer);
glGetBooleanv(GL_STEREO, &isStereo);
}
else {
// Make something reasonable up:
isStereo = FALSE;
isDoubleBuffer = TRUE;
}
// Force "quad-buffered" stereo mode if our own homegrown implementation is active:
if (windowRecord->stereomode == kPsychFrameSequentialStereo) isStereo = TRUE;
// Assign read buffer:
if(PsychIsOnscreenWindow(windowRecord)) {
// Onscreen window: We read from the front- or front-left buffer by default.
// This works on single-buffered and double buffered contexts in a consistent fashion:
// Copy in optional override buffer name:
PsychAllocInCharArg(3, FALSE, &buffername);
// Override buffer name provided?
if (buffername) {
// Which one is it?
// "frontBuffer" is always a valid choice:
if (PsychMatch(buffername, "frontBuffer")) whichBuffer = GL_FRONT;
// Allow selection of left- or right front stereo buffer in stereo mode:
if (PsychMatch(buffername, "frontLeftBuffer") && isStereo) whichBuffer = GL_FRONT_LEFT;
if (PsychMatch(buffername, "frontRightBuffer") && isStereo) whichBuffer = GL_FRONT_RIGHT;
// Allow selection of backbuffer in double-buffered mode:
if (PsychMatch(buffername, "backBuffer") && isDoubleBuffer) whichBuffer = GL_BACK;
// Allow selection of left- or right back stereo buffer in stereo mode:
if (PsychMatch(buffername, "backLeftBuffer") && isStereo && isDoubleBuffer) whichBuffer = GL_BACK_LEFT;
if (PsychMatch(buffername, "backRightBuffer") && isStereo && isDoubleBuffer) whichBuffer = GL_BACK_RIGHT;
// Allow AUX buffer access for debug purposes:
if (PsychMatch(buffername, "aux0Buffer")) whichBuffer = GL_AUX0;
if (PsychMatch(buffername, "aux1Buffer")) whichBuffer = GL_AUX1;
if (PsychMatch(buffername, "aux2Buffer")) whichBuffer = GL_AUX2;
if (PsychMatch(buffername, "aux3Buffer")) whichBuffer = GL_AUX3;
// If 'drawBuffer' is requested, but imaging pipeline inactive, ie., there is no real 'drawBuffer', then we
// map this to the backbuffer, as on a non-imaging configuration, the backbuffer is pretty much exactly the
// equivalent of the 'drawBuffer':
if (PsychMatch(buffername, "drawBuffer") && !(windowRecord->imagingMode & kPsychNeedFastBackingStore)) whichBuffer = GL_BACK;
}
else {
// Default is frontbuffer:
whichBuffer = GL_FRONT;
}
}
else {
// Offscreen window or texture: They only have one buffer, which is the
// backbuffer in double-buffered mode and the frontbuffer in single buffered mode:
whichBuffer=(isDoubleBuffer) ? GL_BACK : GL_FRONT;
}
// Enable this windowRecords framebuffer as current drawingtarget. This should
// also allow us to "GetImage" from Offscreen windows:
if ((windowRecord->imagingMode & kPsychNeedFastBackingStore) || (windowRecord->imagingMode & kPsychNeedFastOffscreenWindows)) {
// Special case: Imaging pipeline active - We need to activate system framebuffer
// so we really read the content of the framebuffer and not of some FBO:
if (PsychIsOnscreenWindow(windowRecord)) {
// It's an onscreen window:
// Homegrown frame-sequential stereo active? Need to remap some stuff:
if (windowRecord->stereomode == kPsychFrameSequentialStereo) {
// Back/Front buffers map to backleft/frontleft buffers:
if (whichBuffer == GL_BACK) whichBuffer = GL_BACK_LEFT;
if (whichBuffer == GL_FRONT) whichBuffer = GL_FRONT_LEFT;
// Special case: Want to read from stereo front buffer?
if ((whichBuffer == GL_FRONT_LEFT) || (whichBuffer == GL_FRONT_RIGHT)) {
// These don't really exist in our homegrown implementation. Their equivalents are the
// regular system front/backbuffers. Due to the bufferswaps happening every video
// refresh cycle and the complex logic on when and how to blit finalizedFBOs into
// the system buffers and the asynchronous execution of the parallel flipper thread,
// we don't know which buffer (GL_BACK or GL_FRONT) corresponds to the leftFront or
// rightFront buffer. Let's be stupid and just return the current front buffer for
// FRONT_LEFT and the current back buffer for FRONT_RIGHT, but warn user about the
// ambiguity:
whichBuffer = (whichBuffer == GL_FRONT_LEFT) ? GL_FRONT : GL_BACK;
if (PsychPrefStateGet_Verbosity() > 2) {
printf("PTB-WARNING: In Screen('GetImage'): You selected retrieval of one of the stereo front buffers, while our homegrown frame-sequential\n");
printf("PTB-WARNING: In Screen('GetImage'): stereo display mode is active. This will impair presentation timing and may cause flicker. The\n");
printf("PTB-WARNING: In Screen('GetImage'): mapping of 'frontLeftBuffer' and 'frontRightBuffer' to actual stimulus content is very ambiguous\n");
printf("PTB-WARNING: In Screen('GetImage'): in this mode. You may therefore end up with the content of the wrong buffer returned! Check results\n");
printf("PTB-WARNING: In Screen('GetImage'): carefully! Better read from 'backLeftBuffer' or 'backRightBuffer' for well defined results.\n\n");
}
}
}
// Homegrown frame-sequential stereo active and backleft or backright buffer requested?
if (((whichBuffer == GL_BACK_LEFT) || (whichBuffer == GL_BACK_RIGHT)) && (windowRecord->stereomode == kPsychFrameSequentialStereo)) {
// We can get the equivalent of the backLeft/RightBuffer from the finalizedFBO's in this mode. Get their content:
viewid = (whichBuffer == GL_BACK_RIGHT) ? 1 : 0;
whichBuffer = GL_COLOR_ATTACHMENT0_EXT;
// Bind finalizedFBO as framebuffer to read from:
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, windowRecord->fboTable[windowRecord->finalizedFBO[viewid]]->fboid);
// Make sure binding gets released at end of routine:
viewid = -1;
} // No frame-sequential stereo: Full imaging pipeline active and one of the drawBuffer's requested?
else if (buffername && (PsychMatch(buffername, "drawBuffer")) && (windowRecord->imagingMode & kPsychNeedFastBackingStore)) {
// Activate drawBufferFBO:
PsychSetDrawingTarget(windowRecord);
whichBuffer = GL_COLOR_ATTACHMENT0_EXT;
// Is the drawBufferFBO multisampled?
viewid = (((windowRecord->stereomode > 0) && (windowRecord->stereodrawbuffer == 1)) ? 1 : 0);
if (windowRecord->fboTable[windowRecord->drawBufferFBO[viewid]]->multisample > 0) {
// It is! We can't read from a multisampled FBO. Need to perform a multisample resolve operation and read
// from the resolved unisample buffer instead. This is only safe if the unisample buffer is either a dedicated
// FBO, or - in case its the final system backbuffer etc. - if preflip operations haven't been performed yet.
// If non dedicated buffer (aka finalizedFBO) and preflip ops have already happened, then the backbuffer contains
// final content for an upcoming Screen('Flip') and we can't use (and therefore taint) that buffer.
if ((windowRecord->inputBufferFBO[viewid] == windowRecord->finalizedFBO[viewid]) && (windowRecord->backBufferBackupDone)) {
// Target for resolve is finalized FBO (probably system backbuffer) and preflip ops have run already. We
// can't do the resolve op, as this would screw up the backbuffer with the final stimulus:
printf("PTB-ERROR: Tried to 'GetImage' from a multisampled 'drawBuffer', but can't perform anti-aliasing pass due to\n");
printf("PTB-ERROR: lack of a dedicated resolve buffer.\n");
printf("PTB-ERROR: You can get what you wanted by either one of two options:\n");
printf("PTB-ERROR: Either enable a processing stage in the imaging pipeline, even if you don't need it, e.g., by setting\n");
printf("PTB-ERROR: the imagingmode argument in the 'OpenWindow' call to kPsychNeedImageProcessing. This will create a\n");
printf("PTB-ERROR: suitable resolve buffer. Or place the 'GetImage' call before any Screen('DrawingFinished') call, then\n");
printf("PTB-ERROR: i can (ab-)use the system backbuffer as a temporary resolve buffer.\n\n");
PsychErrorExitMsg(PsychError_user, "Tried to 'GetImage' from a multi-sampled 'drawBuffer'. Unsupported operation under given conditions.");
}
else {
// Ok, the inputBufferFBO is a suitable temporary resolve buffer. Perform a multisample resolve blit to it:
// A simple glBlitFramebufferEXT() call will do the copy & downsample operation:
glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, windowRecord->fboTable[windowRecord->drawBufferFBO[viewid]]->fboid);
glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, windowRecord->fboTable[windowRecord->inputBufferFBO[viewid]]->fboid);
glBlitFramebufferEXT(0, 0, windowRecord->fboTable[windowRecord->inputBufferFBO[viewid]]->width, windowRecord->fboTable[windowRecord->inputBufferFBO[viewid]]->height,
0, 0, windowRecord->fboTable[windowRecord->inputBufferFBO[viewid]]->width, windowRecord->fboTable[windowRecord->inputBufferFBO[viewid]]->height,
GL_COLOR_BUFFER_BIT, GL_NEAREST);
// Bind inputBuffer as framebuffer:
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, windowRecord->fboTable[windowRecord->inputBufferFBO[viewid]]->fboid);
viewid = -1;
}
}
}
else {
// No: Activate system framebuffer:
PsychSetDrawingTarget(NULL);
}
}
else {
// Offscreen window or texture: Select drawing target as usual,
// but set color attachment as read buffer:
PsychSetDrawingTarget(windowRecord);
whichBuffer = GL_COLOR_ATTACHMENT0_EXT;
// We do not support multisampled readout:
if (windowRecord->fboTable[windowRecord->drawBufferFBO[0]]->multisample > 0) {
printf("PTB-ERROR: You tried to Screen('GetImage', ...); from an offscreen window or texture which has multisample anti-aliasing enabled.\n");
printf("PTB-ERROR: This operation is not supported. You must first use Screen('CopyWindow') to create a non-multisampled copy of the\n");
printf("PTB-ERROR: texture or offscreen window, then use 'GetImage' on that copy. The copy will be anti-aliased, so you'll get what you\n");
printf("PTB-ERROR: wanted with a bit more effort. Sorry for the inconvenience, but this is mostly a hardware limitation.\n\n");
PsychErrorExitMsg(PsychError_user, "Tried to 'GetImage' from a multi-sampled texture or offscreen window. Unsupported operation.");
}
}
}
else {
// Normal case: No FBO based imaging - Select drawing target as usual:
PsychSetDrawingTarget(windowRecord);
}
if (!isOES) {
// Select requested read buffer, after some double-check:
if (whichBuffer == 0) PsychErrorExitMsg(PsychError_user, "Invalid or unknown 'bufferName' argument provided.");
glReadBuffer(whichBuffer);
if (PsychPrefStateGet_Verbosity() > 5) printf("PTB-DEBUG: In Screen('GetImage'): GL-Readbuffer whichBuffer = %i\n", whichBuffer);
}
else {
// OES: No way to select readbuffer, it is "hard-coded" by system spec, depending
// on framebuffer. For bound FBO, always color attachment zero, for system framebuffer,
// always front buffer on single-buffered setup, back buffer on double-buffered setup:
if (buffername && PsychIsOnscreenWindow(windowRecord) && (whichBuffer != GL_COLOR_ATTACHMENT0_EXT)) {
// Some part of the real system framebuffer of an onscreen window explicitely requested.
if ((windowRecord->windowType == kPsychSingleBufferOnscreen) && (whichBuffer != GL_FRONT) && (PsychPrefStateGet_Verbosity() > 1)) {
printf("PTB-WARNING: Tried to Screen('GetImage') single-buffered framebuffer '%s', but only 'frontBuffer' supported on OpenGL-ES. Returning that instead.\n", buffername);
}
if ((windowRecord->windowType == kPsychDoubleBufferOnscreen) && (whichBuffer != GL_BACK) && (PsychPrefStateGet_Verbosity() > 1)) {
printf("PTB-WARNING: Tried to Screen('GetImage') double-buffered framebuffer '%s', but only 'backBuffer' supported on OpenGL-ES. Returning that instead.\n", buffername);
}
}
}
if (whichBuffer == GL_COLOR_ATTACHMENT0_EXT) {
// FBO of texture / offscreen window / onscreen drawBuffer/inputBuffer
// has size of clientrect -- potentially larger or smaller than backbuffer:
PsychCopyRect(windowRect, windowRecord->clientrect);
}
else {
// Non-FBO backed texture / offscreen window / onscreen window has size
// of raw rect (==clientrect for non-onscreen, == backbuffer size for onscreen):
PsychCopyRect(windowRect, windowRecord->rect);
}
// Retrieve optional read rectangle:
if(!PsychCopyInRectArg(2, FALSE, sampleRect)) PsychCopyRect(sampleRect, windowRect);
if (IsPsychRectEmpty(sampleRect)) return(PsychError_none);
// Compute sampling rectangle:
if ((PsychGetWidthFromRect(sampleRect) >= INT_MAX) || (PsychGetHeightFromRect(sampleRect) >= INT_MAX)) {
PsychErrorExitMsg(PsychError_user, "Too big 'rect' argument provided. Both width and height of the rect must not exceed 2^31 pixels!");
}
sampleRectWidth = (size_t) PsychGetWidthFromRect(sampleRect);
sampleRectHeight= (size_t) PsychGetHeightFromRect(sampleRect);
// Regular image fetch to runtime, or adding to a movie?
if (!isAddMovieFrame) {
// Regular fetch:
// Get optional floatprecision flag: We return data with float-precision if
// this flag is set. By default we return uint8 data:
PsychCopyInFlagArg(4, FALSE, &floatprecision);
// Get the optional number of channels flag: By default we return 3 channels,
// the Red, Green, and blue color channel:
nrchannels = 3;
PsychCopyInIntegerArg(5, FALSE, &nrchannels);
if (nrchannels < 1 || nrchannels > 4) PsychErrorExitMsg(PsychError_user, "Number of requested channels 'nrchannels' must be between 1 and 4!");
if (!floatprecision) {
// Readback of standard 8bpc uint8 pixels:
// No Luminance + Alpha on OES:
if (isOES && (nrchannels == 2)) PsychErrorExitMsg(PsychError_user, "Number of requested channels 'nrchannels' == 2 not supported on OpenGL-ES!");
PsychAllocOutUnsignedByteMatArg(1, TRUE, (int) sampleRectHeight, (int) sampleRectWidth, (int) nrchannels, &returnArrayBase);
if (isOES) {
// We only do RGBA reads on OES, then discard unwanted stuff ourselves:
redPlane = (psych_uint8*) PsychMallocTemp((size_t) 4 * sampleRectWidth * sampleRectHeight);
}
else {
redPlane = (psych_uint8*) PsychMallocTemp((size_t) nrchannels * sampleRectWidth * sampleRectHeight);
}
planeSize = sampleRectWidth * sampleRectHeight;
glPixelStorei(GL_PACK_ALIGNMENT,1);
invertedY = (int) (windowRect[kPsychBottom] - sampleRect[kPsychBottom]);
if (isOES) {
glReadPixels((int) sampleRect[kPsychLeft], invertedY, (int) sampleRectWidth, (int) sampleRectHeight, GL_RGBA, GL_UNSIGNED_BYTE, redPlane);
stride = 4;
}
else {
stride = nrchannels;
if (nrchannels==1) glReadPixels((int) sampleRect[kPsychLeft], invertedY, (int) sampleRectWidth, (int) sampleRectHeight, GL_RED, GL_UNSIGNED_BYTE, redPlane);
if (nrchannels==2) glReadPixels((int) sampleRect[kPsychLeft], invertedY, (int) sampleRectWidth, (int) sampleRectHeight, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, redPlane);
if (nrchannels==3) glReadPixels((int) sampleRect[kPsychLeft], invertedY, (int) sampleRectWidth, (int) sampleRectHeight, GL_RGB, GL_UNSIGNED_BYTE, redPlane);
if (nrchannels==4) glReadPixels((int) sampleRect[kPsychLeft], invertedY, (int) sampleRectWidth, (int) sampleRectHeight, GL_RGBA, GL_UNSIGNED_BYTE, redPlane);
}
//in one pass transpose and flip what we read with glReadPixels before returning.
//-glReadPixels insists on filling up memory in sequence by reading the screen row-wise whearas Matlab reads up memory into columns.
//-the Psychtoolbox screen as setup by gluOrtho puts 0,0 at the top left of the window but glReadPixels always believes that it's at the bottom left.
for(ix=0; ix < sampleRectWidth; ix++){
for(iy=0; iy < sampleRectHeight; iy++){
// Compute write-indices for returned data:
redReturnIndex=PsychIndexElementFrom3DArray(sampleRectHeight, sampleRectWidth, nrchannels, iy, ix, 0);
greenReturnIndex=PsychIndexElementFrom3DArray(sampleRectHeight, sampleRectWidth, nrchannels, iy, ix, 1);
blueReturnIndex=PsychIndexElementFrom3DArray(sampleRectHeight, sampleRectWidth, nrchannels, iy, ix, 2);
alphaReturnIndex=PsychIndexElementFrom3DArray(sampleRectHeight, sampleRectWidth, nrchannels, iy, ix, 3);
// Always return RED/LUMINANCE channel:
returnArrayBase[redReturnIndex] = redPlane[(ix + ((sampleRectHeight-1) - iy ) * sampleRectWidth) * (size_t) stride + 0];
// Other channels on demand:
if (nrchannels>1) returnArrayBase[greenReturnIndex] = redPlane[(ix + ((sampleRectHeight-1) - iy ) * sampleRectWidth) * (size_t) stride + 1];
if (nrchannels>2) returnArrayBase[blueReturnIndex] = redPlane[(ix + ((sampleRectHeight-1) - iy ) * sampleRectWidth) * (size_t) stride + 2];
if (nrchannels>3) returnArrayBase[alphaReturnIndex] = redPlane[(ix + ((sampleRectHeight-1) - iy ) * sampleRectWidth) * (size_t) stride + 3];
}
}
}
else {
// Readback of standard 32bpc float pixels into a double matrix:
// No Luminance + Alpha on OES:
if (isOES && (nrchannels == 2)) PsychErrorExitMsg(PsychError_user, "Number of requested channels 'nrchannels' == 2 not supported on OpenGL-ES!");
// Only float readback on floating point FBO's with EXT_color_buffer_float support:
if (isOES && ((whichBuffer != GL_COLOR_ATTACHMENT0_EXT) || (windowRecord->bpc < 16) || !glewIsSupported("GL_EXT_color_buffer_float"))) {
printf("PTB-ERROR: Tried to 'GetImage' pixels in floating point format from a non-floating point surface, or not supported by your hardware.\n");
PsychErrorExitMsg(PsychError_user, "'GetImage' of floating point values from given object not supported on OpenGL-ES!");
}
PsychAllocOutDoubleMatArg(1, TRUE, (int) sampleRectHeight, (int) sampleRectWidth, (int) nrchannels, &returnArrayBaseDouble);
if (isOES) {
dredPlane = (float*) PsychMallocTemp((size_t) 4 * sizeof(float) * sampleRectWidth * sampleRectHeight);
stride = 4;
}
else {
dredPlane = (float*) PsychMallocTemp((size_t) nrchannels * sizeof(float) * sampleRectWidth * sampleRectHeight);
stride = nrchannels;
}
planeSize = sampleRectWidth * sampleRectHeight * sizeof(float);
glPixelStorei(GL_PACK_ALIGNMENT, 1);
invertedY = (int) (windowRect[kPsychBottom]-sampleRect[kPsychBottom]);
if (!isOES) {
if (nrchannels==1) glReadPixels((int) sampleRect[kPsychLeft], invertedY, (int) sampleRectWidth, (int) sampleRectHeight, GL_RED, GL_FLOAT, dredPlane);
if (nrchannels==2) glReadPixels((int) sampleRect[kPsychLeft], invertedY, (int) sampleRectWidth, (int) sampleRectHeight, GL_LUMINANCE_ALPHA, GL_FLOAT, dredPlane);
if (nrchannels==3) glReadPixels((int) sampleRect[kPsychLeft], invertedY, (int) sampleRectWidth, (int) sampleRectHeight, GL_RGB, GL_FLOAT, dredPlane);
if (nrchannels==4) glReadPixels((int) sampleRect[kPsychLeft], invertedY, (int) sampleRectWidth, (int) sampleRectHeight, GL_RGBA, GL_FLOAT, dredPlane);
}
else {
glReadPixels((int) sampleRect[kPsychLeft], invertedY, (int) sampleRectWidth, (int) sampleRectHeight, GL_RGBA, GL_FLOAT, dredPlane);
}
//in one pass transpose and flip what we read with glReadPixels before returning.
//-glReadPixels insists on filling up memory in sequence by reading the screen row-wise whearas Matlab reads up memory into columns.
//-the Psychtoolbox screen as setup by gluOrtho puts 0,0 at the top left of the window but glReadPixels always believes that it's at the bottom left.
for(ix=0; ix < sampleRectWidth; ix++){
for(iy=0; iy < sampleRectHeight; iy++){
// Compute write-indices for returned data:
redReturnIndex=PsychIndexElementFrom3DArray(sampleRectHeight, sampleRectWidth, nrchannels, iy, ix, 0);
greenReturnIndex=PsychIndexElementFrom3DArray(sampleRectHeight, sampleRectWidth, nrchannels, iy, ix, 1);
blueReturnIndex=PsychIndexElementFrom3DArray(sampleRectHeight, sampleRectWidth, nrchannels, iy, ix, 2);
alphaReturnIndex=PsychIndexElementFrom3DArray(sampleRectHeight, sampleRectWidth, nrchannels, iy, ix, 3);
// Always return RED/LUMINANCE channel:
returnArrayBaseDouble[redReturnIndex] = dredPlane[(ix + ((sampleRectHeight-1) - iy ) * sampleRectWidth) * (size_t) stride + 0];
// Other channels on demand:
if (nrchannels>1) returnArrayBaseDouble[greenReturnIndex] = dredPlane[(ix + ((sampleRectHeight-1) - iy ) * sampleRectWidth) * (size_t) stride + 1];
if (nrchannels>2) returnArrayBaseDouble[blueReturnIndex] = dredPlane[(ix + ((sampleRectHeight-1) - iy ) * sampleRectWidth) * (size_t) stride + 2];
if (nrchannels>3) returnArrayBaseDouble[alphaReturnIndex] = dredPlane[(ix + ((sampleRectHeight-1) - iy ) * sampleRectWidth) * (size_t) stride + 3];
}
}
}
}
if (isAddMovieFrame) {
// Adding of image to a movie requested:
// Get optional moviehandle:
moviehandle = 0;
PsychCopyInIntegerArg(4, FALSE, &moviehandle);
if (moviehandle < 0) PsychErrorExitMsg(PsychError_user, "Provided 'moviehandle' is negative. Must be greater or equal to zero!");
// Get optional frameduration:
frameduration = 1;
PsychCopyInIntegerArg(5, FALSE, &frameduration);
if (frameduration < 1) PsychErrorExitMsg(PsychError_user, "Number of requested framedurations 'frameduration' is negative. Must be greater than zero!");
framepixels = PsychGetVideoFrameForMoviePtr(moviehandle, &twidth, &theight, &numChannels, &bitdepth);
if (framepixels) {
glPixelStorei(GL_PACK_ALIGNMENT,1);
invertedY = (int) (windowRect[kPsychBottom] - sampleRect[kPsychBottom]);
if (isOES) {
if (bitdepth != 8) PsychErrorExitMsg(PsychError_user, "AddFrameToMovie failed due to wrong bpc value. Only 8 bpc supported on OpenGL-ES.");
if (numChannels == 4) {
// OES: BGRA supported?
if (glewIsSupported("GL_EXT_read_format_bgra")) {
// Yep: Readback in a compatible and acceptably fast format:
glReadPixels((int) sampleRect[kPsychLeft], invertedY, twidth, theight, GL_BGRA, GL_UNSIGNED_BYTE, framepixels);
}
else {
// Suboptimal readback path. will also cause swapped colors in movie writing:
glReadPixels((int) sampleRect[kPsychLeft], invertedY, twidth, theight, GL_RGBA, GL_UNSIGNED_BYTE, framepixels);
}
}
else if (numChannels == 3) {
glReadPixels((int) sampleRect[kPsychLeft], invertedY, twidth, theight, GL_RGB, GL_UNSIGNED_BYTE, framepixels);
}
else PsychErrorExitMsg(PsychError_user, "AddFrameToMovie failed due to wrong number of channels. Only 3 or 4 channels are supported on OpenGL-ES.");
}
else {
// Desktop-GL: Use optimal format and support 16 bpc bitdepth as well.
switch (numChannels) {
case 4:
glReadPixels((int) sampleRect[kPsychLeft], invertedY, twidth, theight, GL_BGRA, (bitdepth <= 8) ? GL_UNSIGNED_INT_8_8_8_8 : GL_UNSIGNED_SHORT, framepixels);
break;
case 3:
glReadPixels((int) sampleRect[kPsychLeft], invertedY, twidth, theight, GL_RGB, (bitdepth <= 8) ? GL_UNSIGNED_BYTE : GL_UNSIGNED_SHORT, framepixels);
break;
case 1:
glReadPixels((int) sampleRect[kPsychLeft], invertedY, twidth, theight, GL_RED, (bitdepth <= 8) ? GL_UNSIGNED_BYTE : GL_UNSIGNED_SHORT, framepixels);
break;
default:
PsychErrorExitMsg(PsychError_user, "AddFrameToMovie failed due to wrong number of channels. Only 1, 3 or 4 channels are supported on OpenGL.");
break;
}
}
// Add frame to movie, mark it as "upside down", with invalid -1 timestamp and a duration of frameduration ticks:
if (PsychAddVideoFrameToMovie(moviehandle, frameduration, TRUE, -1) != 0) {
PsychErrorExitMsg(PsychError_user, "AddFrameToMovie failed with error above!");
}
}
else {
PsychErrorExitMsg(PsychError_user, "Invalid 'moviePtr' provided. Doesn't correspond to a movie open for recording!");
}
}
if (viewid == -1) {
// Need to reset framebuffer binding to get rid of the inputBufferFBO which is bound due to
// multisample resolve ops, or of other special FBO bindings --> Activate system framebuffer:
PsychSetDrawingTarget(NULL);
}
return(PsychError_none);
}
