void PsychGLVertex4f(PsychWindowRecordType *windowRecord, float x, float y, float z, float w)
{
// Classic OpenGL? Use glEnd() and be done:
if (PsychIsGLClassic(windowRecord)) {
glVertex4f(x,y,z,w);
return;
}
// Make sure we don't overflow our internal static vertex array bufer:
if (gl_buffer_index > PSYCH_MAX_IMMSIM_VERTEX_COMPONENTS - 12) {
printf("PTB-ERROR: Overflow of internal immediate mode rendering buffer! Limit of %i components reached.\n", PSYCH_MAX_IMMSIM_VERTEX_COMPONENTS);
printf("PTB-ERROR: You must reduce the workload, or your stimulus image will be damaged. Likely culprit is Screen('Fill/FrameOval') with too high level of detail!\n\n");
return;
}
// Store (x,y,z,w) vertex pos first:
gl_buffer[gl_buffer_index++] = x;
gl_buffer[gl_buffer_index++] = y;
gl_buffer[gl_buffer_index++] = z;
gl_buffer[gl_buffer_index++] = w;
// Then current color (r,g,b,a):
gl_buffer[gl_buffer_index++] = (float) currentColor[0];
gl_buffer[gl_buffer_index++] = (float) currentColor[1];
gl_buffer[gl_buffer_index++] = (float) currentColor[2];
gl_buffer[gl_buffer_index++] = (float) currentColor[3];
// Then current texture coordinates (s,t,u,v):
gl_buffer[gl_buffer_index++] = currentTexCoord[0];
gl_buffer[gl_buffer_index++] = currentTexCoord[1];
gl_buffer[gl_buffer_index++] = currentTexCoord[2];
gl_buffer[gl_buffer_index++] = currentTexCoord[3];
return;
}
/*
PsychSetGLColor()
Accept a Psych color structure and a depth value and call the appropriate variant of glColor.
*/
void PsychSetGLColor(PsychColorType *color, PsychWindowRecordType *windowRecord)
{
int numVals;
numVals=PsychConvertColorToDoubleVector(color, windowRecord, (GLdouble*) &(windowRecord->currentColor));
if(numVals < 3 || numVals > 4) PsychErrorExitMsg(PsychError_internal, "Palette mode not yet implemented or illegal color specifier.");
// Set the color in GL:
if (windowRecord->defaultDrawShader) {
// Drawshader color submission:
HDRglColor4dv(windowRecord->currentColor);
}
else {
// Fixed function pipe:
if (PsychIsGLClassic(windowRecord)) {
// OpenGL-1/2:
glColor4dv(windowRecord->currentColor);
}
else {
// OpenGL-ES 1.x: glColor4f() is only available function.
glColor4f((float) windowRecord->currentColor[0], (float) windowRecord->currentColor[1], (float) windowRecord->currentColor[2], (float) windowRecord->currentColor[3]);
PsychGLColor4f(windowRecord, (float) windowRecord->currentColor[0], (float) windowRecord->currentColor[1], (float) windowRecord->currentColor[2], (float) windowRecord->currentColor[3]);
}
}
}
void PsychGLEnd(PsychWindowRecordType *windowRecord)
{
// Classic OpenGL? Use glEnd() and be done:
if (PsychIsGLClassic(windowRecord)) {
glEnd();
return;
}
// OpenGL 3+ or OpenGL-ES. Need to emulate immediate mode stuff:
// Work to do?
if (gl_buffer_index > 0) {
// Yes: Submit draw call:
glVertexPointer(4, GL_FLOAT, 4 * 3 * sizeof(float), &gl_buffer[0 * 4]);
glColorPointer(4, GL_FLOAT, 4 * 3 * sizeof(float), &gl_buffer[1 * 4]);
glTexCoordPointer(4, GL_FLOAT, 4 * 3 * sizeof(float), &gl_buffer[2 * 4]);
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glDrawArrays(gl_buffer_primitivetype, 0, gl_buffer_index / (4 * 3));
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_COLOR_ARRAY);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
}
// Reset primitive for this Begin->End block:
gl_buffer_primitivetype = (GLenum) 0xffff;
gl_buffer_index = 0;
return;
}
/* Emit a single pixel in top-left corner of window and wait for its rendering
* to complete. Our classic trick to wait for double-buffer swap completion on
* systems where we don't have better system-provided timestamping and syncing
* methods. This needs different implementations on classic OpenGL vs. non-
* immediate mode OpenGL.
*
* A 'flushOnly' flag of TRUE will only flush, not wait.
*
*/
void PsychWaitPixelSyncToken(PsychWindowRecordType *windowRecord, psych_bool flushOnly)
{
// Classic desktop OpenGL in use?
if (PsychIsGLClassic(windowRecord)) {
// Yes. Use our classic fixed-function immediate mode method:
glBegin(GL_POINTS);
glColor4f(0, 0, 0, 0);
glVertex2i(10, 10);
glEnd();
}
else {
// No. Avoid immediate mode functions, they won't work:
GLfloat glverts[2] = { 10, 10 };
glVertexPointer(2, GL_FLOAT, 0, glverts);
glEnableClientState(GL_VERTEX_ARRAY);
glDrawArrays(GL_POINTS, 0, 1);
glDisableClientState(GL_VERTEX_ARRAY);
}
// flushOnly flag - Don't wait for write to happen, just flush it:
if (!flushOnly) {
// Wait for write completion - Used for sync and timestamping:
glFinish();
}
else {
// Only flush:
glFlush();
}
if (flushOnly && (PsychPrefStateGet_Verbosity() > 15)) printf("PTB-DEBUG: PixelSyncToken write + glFlush().\n");
}
void PsychGLTexCoord4f(PsychWindowRecordType *windowRecord, float s, float t, float u, float v)
{
// Classic OpenGL? Use glEnd() and be done:
if (PsychIsGLClassic(windowRecord)) {
glTexCoord4f(s, t, u, v);
return;
}
currentTexCoord[0] = s;
currentTexCoord[1] = t;
currentTexCoord[2] = u;
currentTexCoord[3] = v;
}
void PsychGLRectd(PsychWindowRecordType *windowRecord, double x1, double y1, double x2, double y2)
{
// Classic OpenGL? Use glRectd() and be done:
if (PsychIsGLClassic(windowRecord)) {
glRectd(x1, y1, x2, y2);
return;
}
// Want to emulate a GL_QUAD draw: We do it as a triangle strip:
GLBEGIN(GL_TRIANGLE_STRIP);
GLVERTEX2d(x1, y1);
GLVERTEX2d(x2, y1);
GLVERTEX2d(x1, y2);
GLVERTEX2d(x2, y2);
GLEND();
}
void PsychGLBegin(PsychWindowRecordType *windowRecord, GLenum primitive)
{
// Classic OpenGL? Use glBegin() and be done:
if (PsychIsGLClassic(windowRecord)) {
glBegin(primitive);
return;
}
// OpenGL 3+ or OpenGL-ES. Need to emulate immediate mode stuff:
if (gl_buffer_index > 0) PsychErrorExitMsg(PsychError_internal, "PsychGLBegin() called while already inside PsychGLBegin() block!");
// Assign primitive for this Begin->End block:
gl_buffer_primitivetype = primitive;
return;
}
PsychError SCREENFrameOval(void)
{
PsychRectType rect;
double numSlices, outerRadius, xScale, yScale, xTranslate, yTranslate, rectY, rectX, penWidth, penHeight, penSize, innerRadius;
PsychWindowRecordType *windowRecord;
psych_bool isArgThere, isclassic;
double *xy, *colors;
unsigned char *bytecolors;
double* penSizes;
int numRects, i, nc, mc, nrsize;
GLUquadricObj *diskQuadric;
//all sub functions should have these two lines
PsychPushHelp(useString, synopsisString,seeAlsoString);
if(PsychIsGiveHelp()){PsychGiveHelp();return(PsychError_none);}
//check for superfluous arguments
PsychErrorExit(PsychCapNumInputArgs(6)); //The maximum number of inputs
PsychErrorExit(PsychCapNumOutputArgs(0)); //The maximum number of outputs
//get the window record from the window record argument and get info from the window record
PsychAllocInWindowRecordArg(kPsychUseDefaultArgPosition, TRUE, &windowRecord);
// Query, allocate and copy in all vectors...
numRects = 4;
nrsize = 0;
colors = NULL;
bytecolors = NULL;
mc = nc = 0;
// The negative position -3 means: xy coords are expected at position 3, but they are optional.
// NULL means - don't want a size's vector.
PsychPrepareRenderBatch(windowRecord, -3, &numRects, &xy, 2, &nc, &mc, &colors, &bytecolors, 4, &nrsize, &penSizes, FALSE);
isclassic = PsychIsGLClassic(windowRecord);
// Only up to one rect provided?
if (numRects <= 1) {
// Get the oval and draw it:
PsychCopyRect(rect, windowRecord->clientrect);
isArgThere=PsychCopyInRectArg(kPsychUseDefaultArgPosition, FALSE, rect);
if (isArgThere && IsPsychRectEmpty(rect)) return(PsychError_none);
numRects = 1;
// Get the pen width and height arguments
penWidth=1;
penHeight=1;
PsychCopyInDoubleArg(4, FALSE, &penWidth);
PsychCopyInDoubleArg(5, FALSE, &penHeight);
penSize = (penWidth > penHeight) ? penWidth : penHeight;
}
else {
// Multiple ovals provided. Set up the first one:
PsychCopyRect(rect, &xy[0]);
penSize = penSizes[0];
}
// Create quadric object:
if (isclassic) diskQuadric = gluNewQuadric();
// Draw all ovals (one or multiple):
for (i=0; i < numRects;) {
// Per oval color provided? If so then set it up. If only one common color
// was provided then PsychPrepareRenderBatch() has already set it up.
if (nc>1) {
// Yes. Set color for this specific item:
PsychSetArrayColor(windowRecord, i, mc, colors, bytecolors);
}
// Per oval penSize provided? If so, set it up. Otherwise keep at default size
// common for all ovals, set by code outside loop:
if (nrsize > 1) penSize = penSizes[i];
// Compute drawing parameters for ellipse:
if (!IsPsychRectEmpty(rect)) {
//The glu disk object location and size with a center point and a radius,
//whereas FrameOval accepts a bounding rect. Converting from one set of parameters
//to the other we should careful what we do for rects size of even number of pixels in length.
PsychGetCenterFromRectAbsolute(rect, &xTranslate, &yTranslate);
rectY=PsychGetHeightFromRect(rect);
rectX=PsychGetWidthFromRect(rect);
if(rectX == rectY){
xScale=1;
yScale=1;
outerRadius=rectX/2;
}else if(rectX > rectY){
xScale=1;
yScale=rectY/rectX;
outerRadius=rectX/2;
}else {
yScale=1;
xScale=rectX/rectY;
outerRadius=rectY/2;
}
numSlices = 3.14159265358979323846 * 2 * outerRadius;
innerRadius = outerRadius - penSize;
innerRadius = (innerRadius < 0) ? 0 : innerRadius;
if (isclassic) {
// Draw: Set up position, scale and size via matrix transform:
glPushMatrix();
glTranslated(xTranslate, yTranslate, 0);
glScaled(xScale, yScale, 1);
// Compute disk quadric for given params: This is awfully slow and would
// benefit a lot from shader magic on modern GPUs:
gluDisk(diskQuadric, innerRadius, outerRadius, (int) numSlices, 1);
glPopMatrix();
}
else {
PsychDrawDisc(windowRecord, (float) xTranslate, (float) yTranslate, (float) innerRadius, (float) outerRadius, (int) numSlices, (float) xScale, (float) yScale, 0, 360);
}
}
// Done with this one. Set up the next one, if any...
i++;
if (i < numRects) {
PsychCopyRect(rect, &xy[i*4]);
}
// Next oval.
}
// Release quadric object:
if (isclassic) gluDeleteQuadric(diskQuadric);
// Mark end of drawing op. This is needed for single buffered drawing:
PsychFlushGL(windowRecord);
// All Psychfunctions require this.
return(PsychError_none);
}
PsychError SCREENFillPoly(void)
{
PsychColorType color;
PsychWindowRecordType *windowRecord;
double whiteValue;
int i, mSize, nSize, pSize;
psych_bool isArgThere;
double *pointList;
double isConvex;
int j,k;
int flag;
double z;
combinerCacheSlot = 0;
combinerCacheSize = 0;
combinerCache = NULL;
//all sub functions should have these two lines
PsychPushHelp(useString, synopsisString,seeAlsoString);
if(PsychIsGiveHelp()){PsychGiveHelp();return(PsychError_none);};
//check for superfluous arguments
PsychErrorExit(PsychCapNumInputArgs(4)); //The maximum number of inputs
PsychErrorExit(PsychCapNumOutputArgs(0)); //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 the color argument or use the default, then coerce to the form determened by the window depth.
isArgThere=PsychCopyInColorArg(2, FALSE, &color);
if(!isArgThere){
whiteValue=PsychGetWhiteValueFromWindow(windowRecord);
PsychLoadColorStruct(&color, kPsychIndexColor, whiteValue ); //index mode will coerce to any other.
}
PsychCoerceColorMode( &color);
//get the list of pairs and validate.
PsychAllocInDoubleMatArg(3, kPsychArgRequired, &mSize, &nSize, &pSize, &pointList);
if(nSize!=2) PsychErrorExitMsg(PsychError_user, "Width of pointList must be 2");
if(mSize<3) PsychErrorExitMsg(PsychError_user, "Polygons must consist of at least 3 points; M dimension of pointList was < 3!");
if(pSize>1) PsychErrorExitMsg(PsychError_user, "pointList must be a 2D matrix, not a 3D matrix!");
isConvex = -1;
PsychCopyInDoubleArg(4, kPsychArgOptional, &isConvex);
// On non-OpenGL1/2 we always force isConvex to zero, so the GLU tesselator is
// always used. This because the tesselator only emits GL_TRIANGLES and GL_TRIANGLE_STRIP
// and GL_TRIANGLE_FANS primitives which are supported on all current OpenGL API's, whereas
// or "classic" fast-path needs GL_POLYGONS, which are only supported on classic OpenGL1/2:
if (!PsychIsGLClassic(windowRecord)) isConvex = 0;
// Enable this windowRecords framebuffer as current drawingtarget:
PsychSetDrawingTarget(windowRecord);
// Set default drawshader:
PsychSetShader(windowRecord, -1);
PsychUpdateAlphaBlendingFactorLazily(windowRecord);
PsychSetGLColor(&color, windowRecord);
///////// Test for convexity ////////
// This algorithm checks, if the polygon is definitely convex, or not.
// We take the slow-path, if polygon is non-convex or if we can't prove
// that it is convex.
//
// Algorithm adapted from: http://astronomy.swin.edu.au/~pbourke/geometry/clockwise/
// Which was written by Paul Bourke, 1998.
//
// -> This webpage explains the mathematical principle behind the test and provides
// a C-Source file which has been adapted for use here.
//
if (isConvex == -1) {
flag = 0;
for (i=0; i < mSize; i++) {
j = (i + 1) % mSize;
k = (i + 2) % mSize;
z = (pointList[j] - pointList[i]) * (pointList[k+mSize] - pointList[j+mSize]);
z -= (pointList[j+mSize] - pointList[i+mSize]) * (pointList[k] - pointList[j]);
if (z < 0) {
flag |= 1;
}
else if (z > 0) {
flag |= 2;
}
if (flag == 3) {
// This is definitely a CONCAVE polygon --> not Convex --> Take slow but safe path.
break;
}
}
if (flag!=0 && flag!=3) {
// This is a convex polygon --> Take fast path.
isConvex = 1;
}
else {
// This is a complex polygon --> can't determine if it is convex or not --> Take slow but safe path.
isConvex = 0;
}
}
////// Switch between fast path and slow path, depending on convexity of polygon:
if (isConvex > 0) {
// Convex, non-self-intersecting polygon - Take the fast-path:
glBegin(GL_POLYGON);
for(i=0;i<mSize;i++) glVertex2d((GLdouble)pointList[i], (GLdouble)pointList[i+mSize]);
glEnd();
}
else {
// Possibly concave and/or self-intersecting polygon - At least we couldn't prove it is convex.
// Take the slow, but safe, path using GLU-Tesselators to break it up into a couple of convex, simple
// polygons:
// Create and initialize a new GLU-Tesselator object, if needed:
if (NULL == tess) {
// Create tesselator:
tess = gluNewTess();
if (NULL == tess) PsychErrorExitMsg(PsychError_outofMemory, "Out of memory condition in Screen('FillPoly')! Not enough space.");
// Assign our callback-functions:
gluTessCallback(tess, GLU_TESS_BEGIN, GLUTESSCBCASTER PsychtcbBegin);
gluTessCallback(tess, GLU_TESS_VERTEX, GLUTESSCBCASTER PsychtcbVertex);
gluTessCallback(tess, GLU_TESS_END, GLUTESSCBCASTER PsychtcbEnd);
gluTessCallback(tess, GLU_TESS_COMBINE, GLUTESSCBCASTER PsychtcbCombine);
// Define all tesselated polygons to lie in the x-y plane:
gluTessNormal(tess, 0, 0, 1);
}
// We need to hold the values in a temporary array:
if (tempvsize < mSize) {
tempvsize = ((mSize / 1000) + 1) * 1000;
tempv = (double*) realloc((void*) tempv, sizeof(double) * 3 * tempvsize);
if (NULL == tempv) PsychErrorExitMsg(PsychError_outofMemory, "Out of memory condition in Screen('FillPoly')! Not enough space.");
}
// Now submit our Polygon for tesselation:
gluTessBeginPolygon(tess, NULL);
gluTessBeginContour(tess);
for(i=0; i < mSize; i++) {
tempv[i*3]=(GLdouble) pointList[i];
tempv[i*3+1]=(GLdouble) pointList[i+mSize];
tempv[i*3+2]=0;
gluTessVertex(tess, (GLdouble*) &(tempv[i*3]), (void*) &(tempv[i*3]));
}
// Process, finalize and render it by calling our callback-functions:
gluTessEndContour(tess);
gluTessEndPolygon (tess);
// Done with drawing the filled polygon. (Slow-Path)
}
// Mark end of drawing op. This is needed for single buffered drawing:
PsychFlushGL(windowRecord);
// printf("CombinerCalls %i out of %i allocated.\n", combinerCacheSlot, combinerCacheSize);
return(PsychError_none);
}
PsychError SCREENFillOval(void)
{
PsychRectType rect;
double numSlices, radius, xScale, yScale, xTranslate, yTranslate, rectY, rectX;
PsychWindowRecordType *windowRecord;
psych_bool isArgThere, isclassic;
double *xy, *colors;
unsigned char *bytecolors;
int numRects, i, nc, mc, nrsize;
GLUquadricObj *diskQuadric;
double perfectUpToMaxDiameter;
static double perfectUpToMaxDiameterOld = 0;
//all sub functions should have these two lines
PsychPushHelp(useString, synopsisString,seeAlsoString);
if(PsychIsGiveHelp()){PsychGiveHelp();return(PsychError_none);}
//check for superfluous arguments
PsychErrorExit(PsychCapNumInputArgs(4)); //The maximum number of inputs
PsychErrorExit(PsychCapNumOutputArgs(0)); //The maximum number of outputs
//get the window record from the window record argument and get info from the window record
PsychAllocInWindowRecordArg(kPsychUseDefaultArgPosition, TRUE, &windowRecord);
isclassic = PsychIsGLClassic(windowRecord);
perfectUpToMaxDiameter = PsychGetWidthFromRect(windowRecord->clientrect);
if (PsychGetHeightFromRect(windowRecord->clientrect) < perfectUpToMaxDiameter) perfectUpToMaxDiameter = PsychGetHeightFromRect(windowRecord->clientrect);
PsychCopyInDoubleArg(4, kPsychArgOptional, &perfectUpToMaxDiameter);
// Compute number of subdivisions (slices) to provide a perfect oval, i.e., one subdivision for each
// distance unit on the circumference of the oval.
numSlices = 3.14159265358979323846 * perfectUpToMaxDiameter;
if ((perfectUpToMaxDiameter != perfectUpToMaxDiameterOld) || (windowRecord->fillOvalDisplayList == 0)) {
perfectUpToMaxDiameterOld = perfectUpToMaxDiameter;
// Destroy old display list so it gets rebuilt with the new numSlices setting:
if (isclassic && (windowRecord->fillOvalDisplayList != 0)) {
glDeleteLists(windowRecord->fillOvalDisplayList, 1);
windowRecord->fillOvalDisplayList = 0;
}
}
// Already cached display list for filled ovals for this windowRecord available?
if (isclassic && (windowRecord->fillOvalDisplayList == 0)) {
// Nope. Create our prototypical filled oval:
// Generate a filled disk of that radius and subdivision and store it in a display list:
diskQuadric=gluNewQuadric();
windowRecord->fillOvalDisplayList = glGenLists(1);
glNewList(windowRecord->fillOvalDisplayList, GL_COMPILE);
gluDisk(diskQuadric, 0, 1, (int) numSlices, 1);
glEndList();
gluDeleteQuadric(diskQuadric);
// Display list ready for use in this and all future drawing calls for this windowRecord.
}
// Query, allocate and copy in all vectors...
numRects = 4;
nrsize = 0;
colors = NULL;
bytecolors = NULL;
mc = nc = 0;
// The negative position -3 means: xy coords are expected at position 3, but they are optional.
// NULL means - don't want a size's vector.
PsychPrepareRenderBatch(windowRecord, -3, &numRects, &xy, 2, &nc, &mc, &colors, &bytecolors, 0, &nrsize, NULL, FALSE);
// Only up to one rect provided?
if (numRects <= 1) {
// Get the oval and draw it:
PsychCopyRect(rect, windowRecord->clientrect);
isArgThere=PsychCopyInRectArg(kPsychUseDefaultArgPosition, FALSE, rect);
if (isArgThere && IsPsychRectEmpty(rect)) return(PsychError_none);
numRects = 1;
}
else {
// Multiple ovals provided. Set up the first one:
PsychCopyRect(rect, &xy[0]);
}
// Draw all ovals (one or multiple):
for (i = 0; i < numRects;) {
// Per oval color provided? If so then set it up. If only one common color
// was provided then PsychPrepareRenderBatch() has already set it up.
if (nc>1) {
// Yes. Set color for this specific item:
PsychSetArrayColor(windowRecord, i, mc, colors, bytecolors);
}
// Compute drawing parameters for ellipse:
if (!IsPsychRectEmpty(rect)) {
//The glu disk object location and size with a center point and a radius,
//whereas FillOval accepts a bounding rect. Converting from one set of parameters
//to the other we should careful what we do for rects size of even number of pixels in length.
PsychGetCenterFromRectAbsolute(rect, &xTranslate, &yTranslate);
rectY=PsychGetHeightFromRect(rect);
rectX=PsychGetWidthFromRect(rect);
if(rectX == rectY){
xScale=1;
yScale=1;
radius=rectX/2;
} else if(rectX > rectY){
xScale=1;
yScale=rectY/rectX;
radius=rectX/2;
} else {
yScale=1;
xScale=rectX/rectY;
radius=rectY/2;
}
if (isclassic) {
// Draw: Set up position, scale and size via matrix transform:
glPushMatrix();
glTranslatef((float) xTranslate, (float) yTranslate, (float) 0);
glScalef((float) (xScale * radius), (float) (yScale * radius), (float) 1);
// Draw cached disk object (stored in display list):
glCallList(windowRecord->fillOvalDisplayList);
glPopMatrix();
}
else {
PsychDrawDisc(windowRecord, (float) xTranslate, (float) yTranslate, (float) 0, (float) radius, (int) numSlices, (float) xScale, (float) yScale, 0, 360);
}
}
// Done with this one. Set up the next one, if any...
i++;
if (i < numRects) PsychCopyRect(rect, &xy[i*4]);
// Next oval.
}
// Mark end of drawing op. This is needed for single buffered drawing:
PsychFlushGL(windowRecord);
//All psychfunctions require this.
return(PsychError_none);
}
PsychError SCREENDrawTexture(void)
{
static char synopsisString[] =
"Draw the texture specified via 'texturePointer' into the target window specified via 'windowPointer'. "
"In the the OS X Psychtoolbox textures replace offscreen windows for fast drawing of images during animation."
"'sourceRect' specifies a rectangular subpart of the texture to be drawn (Defaults to full texture). "
"'destinationRect' defines the rectangular subpart of the window where the texture should be drawn. This defaults"
"to centered on the screen. "
"'rotationAngle' Specifies a rotation angle in degree for rotated drawing of the texture (Defaults to 0 deg. = upright). "
"'filterMode' How to compute the pixel color values when the texture is drawn magnified, minified or drawn shifted, e.g., "
"if sourceRect and destinationRect do not have the same size or if sourceRect specifies fractional pixel values. 0 = Nearest "
"neighbour filtering, 1 = Bilinear filtering - this is the default. Values 2 or 3 select use of OpenGL mip-mapping for improved "
"quality: 2 = Bilinear filtering for nearest mipmap level, 3 = Trilinear filtering across mipmap levels, 4 = Nearest neighbour "
"filtering for nearest mipmap level, 5 = nearest neighbour filtering with linear interpolation between mipmap levels. Mipmap filtering is "
"only supported for GL_TEXTURE_2D textures (see description of 'specialFlags' flag 1 below). A negative filterMode value will "
"also use mip-mapping for fast drawing of blurred textures if the GL_TEXTURE_2D format is used: Mip-maps are essentially image "
"resolution pyramids, the filterMode value selects a specific layer in that pyramid. A value of -1 draws the highest resolution "
"layer, a value of -2 draws a half-resolution layer, a value of -3 draws a quarter resolution layer and so on. Each layer has "
"half the resolution of the preceeding layer. This allows for very fast drawing of blurred or low-pass filtered images, e.g., for "
"gaze-contingent displays. However, the filter function for downsampling is system dependent and may vary across graphics cards, "
"although a box-filter is the most common type. If you need a well defined filter function, use a custom written GLSL shader "
"instead, so you have full control over the mathematical properties of the downsampling function. This would incur a "
"performance penalty.\n"
"'globalAlpha' A global alpha transparency value to apply "
"to the whole texture for blending. Range is 0 = fully transparent to 1 = fully opaque, defaults to one. If both, an alpha-channel "
"and globalAlpha are provided, then the final alpha is the product of both values. 'modulateColor', if provided, overrides the "
"'globalAlpha' value. If 'modulateColor' is specified, the 'globalAlpha' value will be ignored. 'modulateColor' will be a global "
"color that gets applied to the texture as a whole, i.e., it modulates each color channel. E.g., modulateColor = [128 255 0] would "
"leave the green- and alpha-channel untouched, but it would multiply the blue channel with 0 - set it to zero blue intensity, and "
"it would multiply each texel in the red channel by 128/255 - reduce its intensity to 50%. The most interesting application of "
"'modulateColor' is drawing of arbitrary complex shapes of selectable color: Simply generate an all-white luminance texture of "
"arbitrary shape, possibly with alpha channel, then draw it with 'modulateColor' set to the wanted color and global alpha value.\n"
"'textureShader' (optional): If you provide a valid handle of a GLSL shader, this shader will be applied to the texture during "
"drawing. If the texture already has a shader assigned (via Screen('MakeTexture') or automatically by PTB for some reason), then "
"the shader provided here as 'textureShader' will silently override the shader assigned earlier. Application of shaders this way "
"is mostly useful for application of simple single-pass image processing operations to a texture, e.g., a simple blur or a "
"deinterlacing operation for a video texture. If you intend to use this texture multiple times or if you need more complex image "
"processing, e.g., multi-pass operations, better use the Screen('TransformTexture') command. It allows for complex operations to "
"be applied and is more flexible.\n"
"'specialFlags' optional argument: Allows to pass a couple of special flags to influence the drawing. The flags can be combined "
"by mor() ing them together. A value of kPsychUseTextureMatrixForRotation will use a different mode of operation for drawing of "
"rotated textures, where the drawn 'dstRect' texture rectangle is always upright, but texels are retrieved at rotated positions, "
"as if the 'srcRect' rectangle would be rotated. If you set a value of kPsychDontDoRotation then the rotation angle will not be "
"used to rotate the texture. Instead it will be passed to a bount texture shader (if any), which is free to interpret the "
"'rotationAngle' parameters is it wants - e.g., to implement custom texture rotation."
"\n\n"
"'auxParameters' optional argument: If this is set as a vector with at least 4 components, and a multiple of four components, "
"then these values are passed to a shader (if any is bound) as 'auxParameter0....n'. The current implementation supports at "
"most 32 values per draw call. This is mostly useful when drawing procedural textures if one needs to pass more additional "
"parameters to define the texture than can fit into other parameter fields. See 'help ProceduralShadingAPI' for more info. "
"\n\n"
"If you want to draw many textures to the same onscreen- or offscreen window, use the function Screen('DrawTextures'). "
"It accepts the same arguments as this function, but is optimized to draw many textures in one call.";
// If you change useString then also change the corresponding synopsis string in ScreenSynopsis.c
static char useString[] = "Screen('DrawTexture', windowPointer, texturePointer [,sourceRect] [,destinationRect] [,rotationAngle] [, filterMode] [, globalAlpha] [, modulateColor] [, textureShader] [, specialFlags] [, auxParameters]);";
// 1 2 3 4 5 6 7 8 9 10 11
PsychWindowRecordType *source, *target;
PsychRectType sourceRect, targetRect, tempRect;
double rotationAngle = 0; // Default rotation angle is zero deg. = upright.
int filterMode = 1; // Default filter mode is bilinear filtering.
double globalAlpha = 1.0; // Default global alpha is 1 == no effect.
PsychColorType color;
int textureShader, backupShader;
double* auxParameters;
int numAuxParams, m, n, p;
psych_bool isclassic;
int specialFlags = 0;
//all subfunctions should have these two lines.
PsychPushHelp(useString, synopsisString, seeAlsoString);
if(PsychIsGiveHelp()){PsychGiveHelp();return(PsychError_none);};
//Get the window structure for the onscreen window. It holds the onscreein GL context which we will need in the
//final step when we copy the texture from system RAM onto the screen.
PsychErrorExit(PsychCapNumInputArgs(11));
PsychErrorExit(PsychRequireNumInputArgs(2));
PsychErrorExit(PsychCapNumOutputArgs(0));
//Read in arguments
PsychAllocInWindowRecordArg(1, kPsychArgRequired, &target);
PsychAllocInWindowRecordArg(2, kPsychArgRequired, &source);
if(source->windowType!=kPsychTexture) {
PsychErrorExitMsg(PsychError_user, "The first argument supplied was a window pointer, not a texture pointer");
}
// Classic OpenGL-1/2?
isclassic = PsychIsGLClassic(target);
PsychCopyRect(sourceRect,source->clientrect);
PsychCopyInRectArg(3, kPsychArgOptional, sourceRect);
if (IsPsychRectEmpty(sourceRect)) return(PsychError_none);
PsychCopyRect(tempRect, target->clientrect);
PsychCenterRectInRect(sourceRect, tempRect, targetRect);
PsychCopyInRectArg(4, kPsychArgOptional, targetRect);
if (IsPsychRectEmpty(targetRect)) return(PsychError_none);
PsychCopyInDoubleArg(5, kPsychArgOptional, &rotationAngle);
PsychCopyInIntegerArg(6, kPsychArgOptional, &filterMode);
if (filterMode > 5) {
PsychErrorExitMsg(PsychError_user, "filterMode needs to be negative for a specific blur level, or at most 5 for other modes.");
}
// Copy in optional 'globalAlpha': We don't put restrictions on its valid range
// anymore - That made sense for pure fixed function LDR rendering, but no longer
// for HDR rendering or procedural shading.
PsychCopyInDoubleArg(7, kPsychArgOptional, &globalAlpha);
PsychSetDrawingTarget(target);
PsychUpdateAlphaBlendingFactorLazily(target);
if(PsychCopyInColorArg(8, kPsychArgOptional, &color)) {
// set globalAlpha to DBL_MAX to signal that PsychBlitTexture() shouldn't
// use this parameter and not set any modulate color, cause we do it.
globalAlpha = DBL_MAX;
// Setup global vertex color as modulate color for texture drawing:
PsychCoerceColorMode(&color);
// This call stores unclamped color in target->currentColor, as needed
// if color is to be processed by some bound shader (procedural or filtershader)
// inside PsychBlitTextureToDisplay():
PsychConvertColorToDoubleVector(&color, target, (GLdouble*) &(target->currentColor));
// Submit the same color to fixed function pipe attribute as well, in case no
// shader is bound, or shader pulls from standard color attribute (we can't know yet):
if (isclassic) {
glColor4dv(target->currentColor);
}
else {
PsychGLColor4f(target, (float) target->currentColor[0], (float) target->currentColor[1], (float) target->currentColor[2], (float) target->currentColor[3]);
}
}
// Assign optional override texture shader, if any provided:
textureShader = -1;
PsychCopyInIntegerArg(9, kPsychArgOptional, &textureShader);
// Assign any other optional special flags:
PsychCopyInIntegerArg(10, kPsychArgOptional, &specialFlags);
// Set rotation mode flag for texture matrix rotation if secialFlags is set accordingly:
if (specialFlags & kPsychUseTextureMatrixForRotation) source->specialflags|=kPsychUseTextureMatrixForRotation;
// Set rotation mode flag for no fixed function pipeline rotation if secialFlags is set accordingly:
if (specialFlags & kPsychDontDoRotation) source->specialflags|=kPsychDontDoRotation;
// Optional auxParameters:
auxParameters = NULL;
m=n=p=0;
if (PsychAllocInDoubleMatArg(11, kPsychArgOptional, &m, &n, &p, &auxParameters)) {
if ((p!=1) || (m * n < 4) || (((m*n) % 4)!=0)) PsychErrorExitMsg(PsychError_user, "The 11th argument must be a vector of 'auxParameter' values with a multiple of 4 components.");
}
numAuxParams = m*n;
target->auxShaderParamsCount = numAuxParams;
// Pass auxParameters for current primitive in the auxShaderParams field.
if (numAuxParams > 0) {
target->auxShaderParams = auxParameters;
}
else {
target->auxShaderParams = NULL;
}
if (textureShader > -1) {
backupShader = source->textureFilterShader;
source->textureFilterShader = -1 * textureShader;
PsychBlitTextureToDisplay(source, target, sourceRect, targetRect, rotationAngle, filterMode, globalAlpha);
source->textureFilterShader = backupShader;
}
else {
PsychBlitTextureToDisplay(source, target, sourceRect, targetRect, rotationAngle, filterMode, globalAlpha);
}
// Reset rotation mode flag:
source->specialflags &= ~(kPsychUseTextureMatrixForRotation | kPsychDontDoRotation);
target->auxShaderParams = NULL;
target->auxShaderParamsCount = 0;
// Mark end of drawing op. This is needed for single buffered drawing:
PsychFlushGL(target);
return(PsychError_none);
}
// Batch-drawing version of DrawTexture:
PsychError SCREENDrawTextures(void)
{
// If you change useString then also change the corresponding synopsis string in ScreenSynopsis.c 1 2 3 4 5 6 7 8
static char useString[] = "Screen('DrawTextures', windowPointer, texturePointer(s) [, sourceRect(s)] [, destinationRect(s)] [, rotationAngle(s)] [, filterMode(s)] [, globalAlpha(s)] [, modulateColor(s)] [, textureShader] [, specialFlags] [, auxParameters]);";
// 1 2 3 4 5 6 7 8 9 10 11
static char synopsisString[] = "Draw many textures at once, either one texture to many locations or many textures.\n"
"This function accepts the same parameters as Screen('DrawTexture'), but it is optimized for drawing many textures. "
"You can leave out each argument, a default setting will be used in that case, provide it once to apply it to all "
"drawn items, or provide a vector or matrix with a individual setting for each drawn item. If you provide multiple "
"settings per argument, then the number must match between all arguments.\n\n"
"Examples:\n"
"a) One texture drawn to different locations at different orientations: Provide one texture handle for the texturePointer, "
"a 4 row by n columns matrix for 'destinationRect' to provide target rectangles for n locations, provide a n component "
"vector of 'rotationAngles' for the n different orientations of the n drawn texture patches.\n"
"b) n textures drawn to n different locations: Same as a) but provide a n component vector of 'texturePointers' one for "
"each texture to be drawn to one of n locations at n angles.\n";
PsychWindowRecordType *source, *target;
PsychRectType sourceRect, targetRect, tempRect;
PsychColorType color;
double *dstRects, *srcRects, *colors, *penSizes, *globalAlphas, *filterModes, *rotationAngles;
unsigned char *bytecolors;
int numTexs, numdstRects, numsrcRects, i, nc, mc, nrsize, m, n, p, numAngles, numFilterModes, numAlphas, numRef;
double* texids;
double rotationAngle, globalAlpha, filterMode;
double* auxParameters;
int numAuxParams, numAuxComponents;
psych_bool isclassic;
int textureShader, backupShader;
int specialFlags = 0;
//all subfunctions should have these two lines.
PsychPushHelp(useString, synopsisString, seeAlsoString);
if(PsychIsGiveHelp()){PsychGiveHelp();return(PsychError_none);};
//Get the window structure for the onscreen window. It holds the onscreen GL context which we will need in the
//final step when we copy the texture from system RAM onto the screen.
PsychErrorExit(PsychCapNumInputArgs(11));
PsychErrorExit(PsychRequireNumInputArgs(2));
PsychErrorExit(PsychCapNumOutputArgs(0));
// The target window is a fixed parameter:
PsychAllocInWindowRecordArg(1, kPsychArgRequired, &target);
// Classic OpenGL-1/2?
isclassic = PsychIsGLClassic(target);
// First get all source texture handles:
PsychAllocInDoubleMatArg(2, kPsychArgRequired, &m, &n, &p, &texids);
if ((p!=1) || (m>1 && n!=1) || (n>1 && m!=1)) PsychErrorExitMsg(PsychError_user, "The second argument must be either a row- or columnvector of valid texture handles.");
// This is the number of texture handles:
numTexs = m * n;
// Only one texture?
if (numTexs == 1) {
// Yes. Allocate it in the conventional way:
PsychAllocInWindowRecordArg(2, kPsychArgRequired, &source);
if(source->windowType!=kPsychTexture) {
PsychErrorExitMsg(PsychError_user, "The second argument supplied was not a texture handle!");
}
}
// Query, allocate and copy in all vectors...
numdstRects = 4;
nrsize = 0;
colors = NULL;
bytecolors = NULL;
penSizes = NULL;
// The negative position -4 means: dstRects coords are expected at position 4, but they are optional.
// NULL means - don't want a size's vector.
PsychPrepareRenderBatch(target, -4, &numdstRects, &dstRects, 8, &nc, &mc, &colors, &bytecolors, 5, &nrsize, &penSizes, FALSE);
// At this point, target is set up as target window, i.e. its GL-Context is active, it is set as drawing target,
// alpha blending is set up according to Screen('BlendFunction'), and the drawing color is set if it is a singular one.
if (nc <= 1) {
// Only one - or no - color provided. One or none?
if(PsychCopyInColorArg(8, kPsychArgOptional, &color)) {
// One global modulate color provided:
// Setup global vertex color as modulate color for texture drawing:
PsychCoerceColorMode(&color);
PsychSetGLColor(&color, target);
}
else {
// No modulateColor provided: Don't use this parameter:
nc = 0;
}
}
// Try to get source rects:
m=n=p=0;
if (PsychAllocInDoubleMatArg(3, kPsychArgOptional, &m, &n, &p, &srcRects)) {
if ((p!=1) || (m!=1 && m!=4)) PsychErrorExitMsg(PsychError_user, "The third argument must be either empty, or a single srcRect 4 component row vector, or a 4 row by n column matrix with srcRects for all objects to draw, not a 3D matrix!");
// Ok, its a one row or four row matrix:
if (m==4) {
// Potentially multiple source rects provided:
numsrcRects = n;
}
else {
// Its a one row vector: This is either a single srcRect for all textures, or something invalid:
if (n!=4) PsychErrorExitMsg(PsychError_user, "The third argument must be either empty, or a single srcRect 4 component row vector, or a 4 row by n column matrix with srcRects for all objects to draw!");
// Single srcRect provided:
numsrcRects = 1;
}
}
else {
// No srcRects provided:
numsrcRects = 0;
}
// Optional rotation angles:
m=n=p=0;
if (PsychAllocInDoubleMatArg(5, kPsychArgOptional, &m, &n, &p, &rotationAngles)) {
if ((p!=1) || (m>1 && n!=1) || (n>1 && m!=1)) PsychErrorExitMsg(PsychError_user, "The fifth argument must be either a row- or columnvector of rotation angles.");
}
numAngles = m * n;
// Default to 0 degree rotation -- upright drawing:
rotationAngle = (numAngles == 1) ? rotationAngles[0] : 0.0;
// Optional filter modes:
m=n=p=0;
if (PsychAllocInDoubleMatArg(6, kPsychArgOptional, &m, &n, &p, &filterModes)) {
if ((p!=1) || (m>1 && n!=1) || (n>1 && m!=1)) PsychErrorExitMsg(PsychError_user, "The sixth argument must be either a row- or columnvector of filterModes.");
}
numFilterModes = m * n;
// Default to bilinear filtering:
filterMode = (numFilterModes == 1) ? filterModes[0] : 1;
// Optional globalAlphas:
m=n=p=0;
if (PsychAllocInDoubleMatArg(7, kPsychArgOptional, &m, &n, &p, &globalAlphas)) {
if ((p!=1) || (m>1 && n!=1) || (n>1 && m!=1)) PsychErrorExitMsg(PsychError_user, "The seventh argument must be either a row- or columnvector of globalAlpha values.");
}
numAlphas = m * n;
globalAlpha = (numAlphas == 1) ? globalAlphas[0] : 1.0;
// Optional auxParameters:
auxParameters = NULL;
m=n=p=0;
if (PsychAllocInDoubleMatArg(11, kPsychArgOptional, &m, &n, &p, &auxParameters)) {
if ((p!=1) || (m < 4) || ((m % 4) !=0)|| (n < 1)) PsychErrorExitMsg(PsychError_user, "The 11th argument must be a column vector or matrix of 'auxParameter' values with at least 4 components and component count a multiple of four.");
}
numAuxParams = n;
numAuxComponents = m;
// Check for consistency: Each parameter must be either not present, present once,
// or present as many times as all other multi-parameters:
numRef = (numsrcRects > numdstRects) ? numsrcRects : numdstRects;
numRef = (numRef > numTexs) ? numRef : numTexs;
numRef = (numRef > nc) ? numRef : nc;
numRef = (numRef > numAlphas) ? numRef : numAlphas;
numRef = (numRef > numFilterModes) ? numRef : numFilterModes;
numRef = (numRef > numAngles) ? numRef : numAngles;
numRef = (numRef > numAuxParams) ? numRef : numAuxParams;
if (numTexs > 1 && numTexs != numRef) {
printf("PTB-ERROR: Number of provided texture handles %i doesn't match number of other primitives %i!\n", numTexs, numRef);
PsychErrorExitMsg(PsychError_user, "Inconsistent number of arguments provided to Screen('DrawTextures').");
}
if (numsrcRects > 1 && numsrcRects != numRef) {
printf("PTB-ERROR: Number of provided source rectangles %i doesn't match number of other primitives %i!\n", numsrcRects, numRef);
PsychErrorExitMsg(PsychError_user, "Inconsistent number of arguments provided to Screen('DrawTextures').");
}
if (numdstRects > 1 && numdstRects != numRef) {
printf("PTB-ERROR: Number of provided destination rectangles %i doesn't match number of other primitives %i!\n", numdstRects, numRef);
PsychErrorExitMsg(PsychError_user, "Inconsistent number of arguments provided to Screen('DrawTextures').");
}
if (numAngles > 1 && numAngles != numRef) {
printf("PTB-ERROR: Number of provided rotation angles %i doesn't match number of other primitives %i!\n", numAngles, numRef);
PsychErrorExitMsg(PsychError_user, "Inconsistent number of arguments provided to Screen('DrawTextures').");
}
if (numAlphas > 1 && numAlphas != numRef) {
printf("PTB-ERROR: Number of provided global alpha values %i doesn't match number of other primitives %i!\n", numAlphas, numRef);
PsychErrorExitMsg(PsychError_user, "Inconsistent number of arguments provided to Screen('DrawTextures').");
}
if (numFilterModes > 1 && numFilterModes != numRef) {
printf("PTB-ERROR: Number of provided filtermode values %i doesn't match number of other primitives %i!\n", numFilterModes, numRef);
PsychErrorExitMsg(PsychError_user, "Inconsistent number of arguments provided to Screen('DrawTextures').");
}
if (nc > 1 && nc != numRef) {
printf("PTB-ERROR: Number of provided modulateColors %i doesn't match number of other primitives %i!\n", nc, numRef);
PsychErrorExitMsg(PsychError_user, "Inconsistent number of arguments provided to Screen('DrawTextures').");
}
if (numAuxParams > 1 && numAuxParams != numRef) {
printf("PTB-ERROR: Number of provided 'auxParameter' column vectors %i doesn't match number of other primitives %i!\n", numAuxParams, numRef);
PsychErrorExitMsg(PsychError_user, "Inconsistent number of arguments provided to Screen('DrawTextures').");
}
// Assign optional override texture shader, if any provided:
textureShader = -1;
PsychCopyInIntegerArg(9, kPsychArgOptional, &textureShader);
// Assign any other optional special flags:
PsychCopyInIntegerArg(10, kPsychArgOptional, &specialFlags);
// Ok, everything consistent so far.
// Texture blitting loop:
for (i=0; i < numRef; i++) {
// Draw i'th texture:
// Check if more than one texture provided. If not then the one single texture has been
// setup already above:
if (numTexs > 1) {
// More than one texture handle provided: Need to allocate i'th one in:
if(!IsWindowIndex((PsychWindowIndexType) texids[i])) {
printf("PTB-ERROR: %i th entry in texture handle vector is not a valid handle!\n");
PsychErrorExitMsg(PsychError_user, "Invalid texture handle provided to Screen('DrawTextures').");
}
// Get it:
FindWindowRecord((PsychWindowIndexType) texids[i], &source);
if(source->windowType!=kPsychTexture) {
printf("PTB-ERROR: %i th entry in texture handle vector is not a valid handle!\n");
PsychErrorExitMsg(PsychError_user, "The second argument supplied was not a texture handle!");
}
// Ok, we have our texture record in source:
}
// Source rectangle provided?
if (numsrcRects > 1) {
// Get i'th source rectangle:
PsychCopyRect(sourceRect, &(srcRects[i*4]));
} else if (numsrcRects == 1) {
// Single source rect provided - get it:
PsychCopyRect(sourceRect, &(srcRects[0]));
} else {
// No source rect provided: Take rectangle of current texture as srcRect:
PsychCopyRect(sourceRect,source->clientrect);
}
// Skip this texture if sourceRect is an empty rect:
if (IsPsychRectEmpty(sourceRect)) continue;
// Destination rectangle provided?
if (numdstRects > 1) {
// Get i'th destination rectangle:
PsychCopyRect(targetRect, &(dstRects[i*4]));
} else if (numdstRects == 1) {
// Single destination rect provided - get it:
PsychCopyRect(targetRect, &(dstRects[0]));
} else {
// No destination rect provided: Center the current sourceRect in the current
// target window and use that as destination:
PsychCopyRect(tempRect, target->clientrect);
PsychCenterRectInRect(sourceRect, tempRect, targetRect);
}
// Skip this texture if targetRect is an empty rect:
if (IsPsychRectEmpty(targetRect)) continue;
if (numAngles > 1) rotationAngle = rotationAngles[i];
if (numFilterModes > 1) filterMode = filterModes[i];
if (numAlphas > 1) globalAlpha = globalAlphas[i];
// Disable alpha if modulateColor active:
if (nc > 0) globalAlpha = DBL_MAX;
// Pass auxParameters for current primitive in the auxShaderParams field.
target->auxShaderParamsCount = numAuxComponents;
if (numAuxParams > 0) {
if (numAuxParams == 1) {
target->auxShaderParams = auxParameters;
}
else {
target->auxShaderParams = &(auxParameters[i * numAuxComponents]);
}
}
else {
target->auxShaderParams = NULL;
}
// Multiple modulateColors provided?
if (nc > 1) {
if (isclassic) {
// Yes. Set it up as current vertex color: We submit to internal currentColor for
// shader based color processing and via glColorXXX() for fixed pipe processing:
if (mc==3) {
if (colors) {
// RGB double:
glColor3dv(&(colors[i*3]));
target->currentColor[0]=colors[i*3 + 0];
target->currentColor[1]=colors[i*3 + 1];
target->currentColor[2]=colors[i*3 + 2];
target->currentColor[3]=1.0;
}
else {
// RGB uint8:
glColor3ubv(&(bytecolors[i*3]));
target->currentColor[0]=((double) bytecolors[i*3 + 0] / 255.0);
target->currentColor[1]=((double) bytecolors[i*3 + 1] / 255.0);
target->currentColor[2]=((double) bytecolors[i*3 + 2] / 255.0);
target->currentColor[3]=1.0;
}
}
else {
if (colors) {
// RGBA double:
glColor4dv(&(colors[i*4]));
target->currentColor[0]=colors[i*4 + 0];
target->currentColor[1]=colors[i*4 + 1];
target->currentColor[2]=colors[i*4 + 2];
target->currentColor[3]=colors[i*4 + 3];
}
else {
// RGBA uint8:
glColor4ubv(&(bytecolors[i*4]));
target->currentColor[0]=((double) bytecolors[i*4 + 0] / 255.0);
target->currentColor[1]=((double) bytecolors[i*4 + 1] / 255.0);
target->currentColor[2]=((double) bytecolors[i*4 + 2] / 255.0);
target->currentColor[3]=((double) bytecolors[i*4 + 3] / 255.0);
}
}
}
else {
PsychSetArrayColor(target, i, mc, colors, bytecolors);
}
}
// Ok, everything assigned. Check parameters:
if (filterMode > 5) {
PsychErrorExitMsg(PsychError_user, "filterMode needs to be negative for a specific blur level, or at most 5 for other modes.");
}
// Set rotation mode flag for texture matrix rotation if secialFlags is set accordingly:
if (specialFlags & kPsychUseTextureMatrixForRotation) source->specialflags|=kPsychUseTextureMatrixForRotation;
if (specialFlags & kPsychDontDoRotation) source->specialflags|=kPsychDontDoRotation;
// Perform blit operation for i'th texture, either with or without an override texture shader applied:
if (textureShader > -1) {
backupShader = source->textureFilterShader;
source->textureFilterShader = -1 * textureShader;
PsychBlitTextureToDisplay(source, target, sourceRect, targetRect, rotationAngle, (int) filterMode, globalAlpha);
source->textureFilterShader = backupShader;
}
else {
PsychBlitTextureToDisplay(source, target, sourceRect, targetRect, rotationAngle, (int) filterMode, globalAlpha);
}
// Reset rotation mode flag:
source->specialflags &= ~(kPsychUseTextureMatrixForRotation | kPsychDontDoRotation);
// Next one...
}
target->auxShaderParams = NULL;
target->auxShaderParamsCount = 0;
// Mark end of drawing op. This is needed for single buffered drawing:
PsychFlushGL(target);
return(PsychError_none);
}
void PsychSetArrayColor(PsychWindowRecordType *windowRecord, int i, int mc, double* colors, unsigned char *bytecolors)
{
psych_bool isgles = !PsychIsGLClassic(windowRecord);
if ((windowRecord->defaultDrawShader) || isgles) {
// Draw shader assigned or OpenGL-ES in use. Need to feed color values into high-precision
// alternative channel for unclamped, high-precision color handling:
if (mc==3) {
i=i * 3;
if (colors) {
// RGB double:
currentColor[0]=colors[i++];
currentColor[1]=colors[i++];
currentColor[2]=colors[i++];
currentColor[3]=1.0;
}
else {
// RGB uint8:
currentColor[0]=((double) bytecolors[i++] / 255.0);
currentColor[1]=((double) bytecolors[i++] / 255.0);
currentColor[2]=((double) bytecolors[i++] / 255.0);
currentColor[3]=1.0;
}
}
else {
i=i * 4;
if (colors) {
// RGBA double:
currentColor[0]=colors[i++];
currentColor[1]=colors[i++];
currentColor[2]=colors[i++];
currentColor[3]=colors[i++];
}
else {
// RGBA uint8:
currentColor[0]=((double) bytecolors[i++] / 255.0);
currentColor[1]=((double) bytecolors[i++] / 255.0);
currentColor[2]=((double) bytecolors[i++] / 255.0);
currentColor[3]=((double) bytecolors[i++] / 255.0);
}
}
if (isgles) {
// GLES can only do glColor4f(), nothing else:
glColor4f((float) currentColor[0], (float) currentColor[1], (float) currentColor[2], (float) currentColor[3]);
}
else {
HDRglColor4dv(currentColor);
}
}
else {
// Standard fixed-function pipeline assigned: Feed into standard glColorXXX() calls:
if (mc==3) {
if (colors) {
// RGB double:
glColor3dv(&(colors[i*3]));
}
else {
// RGB uint8:
glColor3ubv(&(bytecolors[i*3]));
}
}
else {
if (colors) {
// RGBA double:
glColor4dv(&(colors[i*4]));
}
else {
// RGBA uint8:
glColor4ubv(&(bytecolors[i*4]));
}
}
}
return;
}
