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/*
*
* glm.c -- implementation of glm functions
*
* 08-Dec-2005 -- created (RFM)
* 11-Nov-2006 -- Minimal fixes for IntelMac Matlab beta: Replace mxGetPr by mxGetData where appropriate.
*/
#include "mogltypes.h"
// device information
AGLDevice device;
AGLContext context;
CGDirectDisplayID displayID;
int screenw, screenh, bitsperpixel;
double fps;
GLuint fontList;
int fontID,fontStyle,fontSize;
CFDictionaryRef enterMode;
// general-purpose text buffer
#define TEXT_SIZE 4096
char text[TEXT_SIZE];
void glm_close(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {
// delete font
if( fontList>0 )
glDeleteLists(fontList,256);
// tear down context
aglSetCurrentContext( NULL );
aglSetDrawable( context, NULL );
aglDestroyContext( context );
// restore clut
CGDisplayRestoreColorSyncSettings();
// release displays
CGDisplaySwitchToMode(displayID,enterMode);
CGDisplayRelease(displayID);
// clear display information
device=NULL;
context=NULL;
displayID=NULL;
screenw=screenh=0;
fps=0;
}
void glm_getkeys(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {
plhs[0]=mxCreateNumericMatrix(4,1,mxUINT32_CLASS,mxREAL);
GetKeys((void *)mxGetData(plhs[0]));
}
void glm_getmouse(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {
// get position
Point pt;
GetMouse(&pt);
plhs[0]=mxCreateDoubleMatrix(1,2,mxREAL);
double *dmat=mxGetPr(plhs[0]);
dmat[0]=pt.h;
dmat[1]=pt.v;
// get button state
plhs[1]=mxCreateDoubleMatrix(1,1,mxREAL);
*mxGetPr(plhs[1])=Button();
}
void glm_getscreeninfo(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {
// return screen size in pixels
plhs[0]=mxCreateDoubleMatrix(1,2,mxREAL);
double *p=mxGetPr(plhs[0]);
p[0]=(double)screenw;
p[1]=(double)screenh;
// return frames per secone
plhs[1]=mxCreateDoubleMatrix(1,1,mxREAL);
*mxGetPr(plhs[1])=(double)fps;
// return bits per pixel
plhs[2]=mxCreateDoubleMatrix(1,1,mxREAL);
*mxGetPr(plhs[2])=(double)bitsperpixel;
}
void glm_open(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {
// get requested device
int i=1,nRequestedDevice=(int)mxGetScalar(prhs[0]);
device=GetDeviceList();
while( i++<nRequestedDevice & device!=NULL )
device=GetNextDevice(device);
if( device==NULL )
mxErrMsgTxt("invalid device number");
// get CGDirectDisplayID for this device
displayID = QDGetCGDirectDisplayID(device);
// switch display mode
enterMode=CGDisplayCurrentMode(displayID);
if( mxGetScalar(prhs[1])>0 ) {
boolean_t exact;
CFDictionaryRef mode=CGDisplayBestModeForParameters(displayID,
(size_t)mxGetScalar(prhs[3]),(size_t)mxGetScalar(prhs[1]),(size_t)mxGetScalar(prhs[2]),
&exact);
if(!exact)
mxErrMsgTxt("invalid display mode");
CGDisplayCapture(displayID);
CGDisplaySwitchToMode(displayID,mode);
}
else
CGDisplayCapture(displayID);
// find a pixel format
AGLPixelFormat fmt = aglChoosePixelFormat(&device,1,(const GLint *)mxGetData(prhs[4]));
if( fmt==NULL )
mxErrMsgTxt("no matching pixel format");
// create context and enter full-screen mode
context = aglCreateContext(fmt,NULL);
aglEnable(context,AGL_FS_CAPTURE_SINGLE);
aglSetFullScreen(context,0,0,0,0);
aglSetCurrentContext(context);
aglDestroyPixelFormat(fmt);
// record screen information
CFDictionaryRef dispInfo=CGDisplayCurrentMode(displayID);
CFNumberRef dispNum;
// width
dispNum=CFDictionaryGetValue(dispInfo,kCGDisplayWidth);
CFNumberGetValue(dispNum,kCFNumberIntType,&screenw);
// height
dispNum=CFDictionaryGetValue(dispInfo,kCGDisplayHeight);
CFNumberGetValue(dispNum,kCFNumberIntType,&screenh);
// refresh rate
dispNum=CFDictionaryGetValue(dispInfo,kCGDisplayRefreshRate);
CFNumberGetValue(dispNum,kCFNumberDoubleType,&fps);
// bits per pixel
dispNum=CFDictionaryGetValue(dispInfo,kCGDisplayBitsPerPixel);
CFNumberGetValue(dispNum,kCFNumberIntType,&bitsperpixel);
int argp=0;
char *str="cmd";
glutInit(&argp,&str);
}
void glm_packpixels(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {
// get image
double *dmat=mxGetPr(prhs[0]);
int m=mxGetM(prhs[0]),n=mxGetN(prhs[0])/3;
int padn=( (4-((3*n)%4)) % 4 );
// create return argument
int n2=3*n+padn;
plhs[0]=mxCreateNumericMatrix(n2*m+8,1,mxUINT8_CLASS,mxREAL);
unsigned char *umat=(unsigned char*)mxGetData(plhs[0]);
// store image format and size
umat[n2*m ]=GL_RGB/256;
umat[n2*m+1]=GL_RGB%256;
umat[n2*m+2]=GL_UNSIGNED_BYTE/256;
umat[n2*m+3]=GL_UNSIGNED_BYTE%256;
umat[n2*m+4]=n/256;
umat[n2*m+5]=n%256;
umat[n2*m+6]=m/256;
umat[n2*m+7]=m%256;
// reformat and reorder (much slower if inner and outer loops exchanged)
int i,j;
for(j=0;j<n;j++) {
for(i=0;i<m;i++) {
umat[3*j +n2*((m-1)-i)]=(unsigned char)dmat[i+m*j];
umat[3*j+1+n2*((m-1)-i)]=(unsigned char)dmat[i+m*(j+n)];
umat[3*j+2+n2*((m-1)-i)]=(unsigned char)dmat[i+m*(j+2*n)];
}
}
}
// do this type casting in the m-file wrapper
void glm_setclut(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {
int i;
double *clut=mxGetPr(prhs[0]);
CGByteValue pnRed[256],pnGreen[256],pnBlue[256];
for(i=0;i<256;i++) {
pnRed[i]= (CGByteValue)clut[i];
pnGreen[i]=(CGByteValue)clut[i+256];
pnBlue[i]= (CGByteValue)clut[i+512];
}
CGSetDisplayTransferByByteTable(displayID,256,pnRed,pnGreen,pnBlue);
}
void glm_setfont(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {
// delete previous font
if( fontList>0 )
glDeleteLists(fontList,256);
// get font ID, style, size
fontID= (int)mxGetScalar(prhs[0]);
fontStyle=(int)mxGetScalar(prhs[1]);
fontSize= (int)mxGetScalar(prhs[2]);
// create font
fontList=glGenLists(256);
aglUseFont(context,fontID,fontStyle,fontSize,0,256,fontList);
}
void glm_setmouse(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {
// set position
if( mxGetM(prhs[0])>0 ) {
double *p=mxGetPr(prhs[0]);
CGPoint pos;
pos.x=(float)p[0];
pos.y=(float)p[1];
CGDisplayMoveCursorToPoint(displayID,pos);
}
// set visibility
if( mxGetM(prhs[1])>0 ) {
if( mxGetScalar(prhs[1])!=0 )
CGDisplayShowCursor(displayID);
else
CGDisplayHideCursor(displayID);
}
}
void glm_setswapinterval(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {
GLint swapinterval=(GLint)mxGetScalar(prhs[0]);
aglSetInteger( context, AGL_SWAP_INTERVAL, &swapinterval );
}
AbsoluteTime entrytime;
unsigned char pausepoint[4];
GLint nRead,nDraw;
void glm_swapbuffers(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {
// create return argument and record entry time
if( nlhs>0 ) {
plhs[0]=mxCreateNumericMatrix(1,1,mxUINT64_CLASS,mxREAL);
if( nlhs>1 ) {
plhs[1]=mxCreateNumericMatrix(1,1,mxUINT64_CLASS,mxREAL);
entrytime=UpTime();
}
}
// swap buffers
aglSwapBuffers(context);
// do a trivial graphics operation so that execution halts here
// until buffers are swapped
if( mxGetScalar(prhs[0])>0 ) {
glGetIntegerv(GL_READ_BUFFER,&nRead);
glGetIntegerv(GL_DRAW_BUFFER,&nDraw);
glReadBuffer(GL_BACK);
glDrawBuffer(GL_BACK);
glReadPixels(0,0,1,1,GL_RGBA,GL_UNSIGNED_BYTE,pausepoint);
glWindowPos2d(0,0);
glDrawPixels(1,1,GL_RGBA,GL_UNSIGNED_BYTE,pausepoint);
glReadBuffer(nRead);
glDrawBuffer(nDraw);
glFinish();
}
// record the time
if( nlhs>0 ) {
// record the time
*(AbsoluteTime *)mxGetData(plhs[0])=UpTime();
if( nlhs>1 )
*(long long *)mxGetData(plhs[1])=*(long long *)mxGetData(plhs[0])-*(long long *)&entrytime;
}
}
void glm_text(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {
// check that a font has been created
if( fontList==0 )
mexErrMsgTxt("no font has been chosen");
// get string
mxGetString(prhs[0],text,TEXT_SIZE);
// draw string
glListBase(fontList);
glCallLists(strlen(text),GL_UNSIGNED_BYTE,text);
}
void glm_textsize(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {
// check that a font has been created
if( fontList==0 )
mexErrMsgTxt("no font has been chosen");
// get string
mxGetString(prhs[0],text,TEXT_SIZE);
// save state and use logic operations to prevent bitmap rendering
glPushAttrib(GL_COLOR_BUFFER_BIT);
glEnable(GL_COLOR_LOGIC_OP);
glLogicOp(GL_NOOP);
// see how much raster position changes when text is drawn
double rpos[]={ 0, 0 };
glWindowPos2dv(rpos);
glListBase(fontList);
glCallLists(strlen(text),GL_UNSIGNED_BYTE,text);
glGetDoublev(GL_CURRENT_RASTER_POSITION,rpos);
// restore state
glPopAttrib();
// return text size in pixels
plhs[0]=mxCreateDoubleMatrix(1,2,mxREAL);
double *p=mxGetPr(plhs[0]);
p[0]=(double)rpos[0];
p[1]=(double)fontSize;
}
// command map: moglcore string commands and functions that handle them
// *** it's important that this list be kept in alphabetical order,
// and that glm_map_count be updated for
// each new entry ***
int glm_map_count=13;
cmdhandler glm_map[] = {
{ "glmClose", glm_close },
{ "glmGetKeys", glm_getkeys },
{ "glmGetMouse", glm_getmouse },
{ "glmGetScreenInfo", glm_getscreeninfo },
{ "glmOpen", glm_open },
{ "glmPackPixels", glm_packpixels },
{ "glmSetClut", glm_setclut },
{ "glmSetFont", glm_setfont },
{ "glmSetMouse", glm_setmouse },
{ "glmSetSwapInterval", glm_setswapinterval },
{ "glmSwapBuffers", glm_swapbuffers },
{ "glmText", glm_text },
{ "glmTextSize", glm_textsize }};
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