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/******************************************************************************
* Dragon - a version of Mah-Jongg for X Windows
*
* Author: Gary E. Barnes	March 1989
*
* icon.c - Deals with our icon.  Setup and execution.
******************************************************************************/

#include "main.h"

#include "ic/dragon_icon32.ic"
#include "ic/dragon_icon64.ic"

extern char * malloc();
extern        free();
extern Pixmap XCreateTile();


GC	Icon_GC = (GC)0;		/* GC used for Icon window. */

\f


/*ARGSUSED*/
static void Icon_Expose( w, event, params, num_params )
     Widget	w;
     XEvent	*event;
     String	*params;
     Cardinal	*num_params;
/******************************************************************************
* Called when our Icon window receives an Expose event.  This is only called
* when we are using an Icon window.  If we managed to use an Icon pixmap then
* this routine is not called at all.
******************************************************************************/
{
    Display	*dpy = XtDisplay(w);
    Window	 win = XtWindow(w);
    XImage       ximage;
    XGCValues	 gcv;
    unsigned int wid  = 64;
    unsigned int hei  = 64;
    unsigned int bw = 0;
    unsigned int depth;
    int		 x, y;
    Window	 root;
    unsigned int size;

/*--Figure out how big our window is. */

    DEBUG_CALL(Icon_Expose);
    XGetGeometry( dpy, win, &root, &x, &y,
		  &wid, &hei, &bw, &depth );
    if (wid < 64 || hei < 64) {
	size = 32;
    } else {
	size = 64;
    }

/*--Get a GC and create an image of an appropriate size using one of our
 *  preexisting Icon images. */

    if (Icon_GC == (GC)0) {
	if (Dragon_Resources.Reverse_Video) {
	    gcv.background = BlackPixelOfScreen(XtScreen(w));
	    gcv.foreground = WhitePixelOfScreen(XtScreen(w));
	} else {
	    gcv.foreground = BlackPixelOfScreen(XtScreen(w));
	    gcv.background = WhitePixelOfScreen(XtScreen(w));
	}
	Icon_GC = XtGetGC( w, GCForeground|GCBackground, &gcv );
    }
    ximage.height  = size;
    ximage.width   = size;
    ximage.depth   = 1;
    ximage.xoffset = 0;
    ximage.format  = XYBitmap;
    ximage.data    =
      (size == 64 ? &dragon_icon64_bits[0] :&dragon_icon32_bits[0]);
    ximage.byte_order       = LSBFirst;
    ximage.bitmap_unit      = 8;
    ximage.bitmap_bit_order = LSBFirst;
    ximage.bitmap_pad       = 8;
    ximage.bytes_per_line   = (size+7)/8;

/*--Draw the bitmap on the window. */

    XClearWindow( dpy, win );
    XPutImage( dpy, win, Icon_GC, &ximage, 0, 0,
	       (int)(wid-size)/2, (int)(hei-size)/2,
	       (unsigned int)size, (unsigned int)size );
    DEBUG_RETURN(Icon_Expose);

} /* Icon_Expose */

\f


void Icon_Setup( args, argn, argi )
     Arg	*args;
     int	 argn;
     int	*argi;
/******************************************************************************
*   args - Specifies the ArgList to fill in
*   argn - Specifies the length of args
*   argi - Specifies the ArgList allocation index
*
* Called to handle all of the Icon setup for our main shell.
******************************************************************************/
{
    XIconSize	*ic;
    int		 nic;
    int		 i;
    int		 size;
    int		 accept;
    Pixmap	 Icon_Pixmap = (Pixmap)NULL;
    unsigned int W, H;
    int  	 X, Y;
    unsigned long flags;
    int	  	 scr;

#define SETARG(name,value) \
    if (*argi >= argn) {fprintf(stderr,"IS args overrun!\n");} \
    XtSetArg( args[*argi], name,  value ); ++*argi;

/*--If we've been asked to set up the Icon geometry then do that. */

    DEBUG_CALL(Icon_Setup);
    for(scr = 0;			/* Figure out which screen we are on.*/
	XtScreen(Dragon) != ScreenOfDisplay(XtDisplay(Dragon),scr);
	scr++);

    flags = XParseGeometry( Dragon_Resources.Icon_Geometry,
			    &X, &Y, &W, &H );
    if (flags & XValue) {
	SETARG( XtNiconX, X );
    }
    if (flags & YValue) {
	SETARG( XtNiconY, Y );
    }

/*--Set/Get the Icon_Name. */

    if (Dragon_Resources.Icon_Name == NULL) {
	SETARG( XtNiconName, "Dragon" );
    }

/*--Set up the Icon pixmap or window.  We try to use a pixmap instead of a
 *  window because it is simply less overhead. If there are supported Icon
 *  pixmap sizes then maybe we can use an icon pixmap. */

    if (XGetIconSizes( XtDisplay(Dragon), 
		       RootWindowOfScreen(XtScreen(Dragon)),
		       &ic,
		       &nic )) {

/*--Run over all of the sizes.  We try to get a 64x64 pixmap but we are willing
 *  to settle for a 32x32.  We grab the first size that allows us to create
 *  a pixmap of exactly one of these sizes.  If we cannot find an exact match
 *  then "accept" is set to point to an acceptable size. */

	size = 64;
	accept = -1;
	for (;;) {
	    for (i = 0; i <= nic; ++i) {
		if (ic[i].max_width < size ||
		    ic[i].max_height < size) {
		    continue;			/* Size completely wrong */
		}
		if (accept < 0 ||
		    ic[i].max_width  < ic[accept].max_width ||
		    ic[i].max_height < ic[accept].max_height) {
		    accept = i;			/* Size is acceptable */
		}
		if (ic[i].min_width <= size &&
		    size-ic[i].min_width % ic[i].width_inc == 0 &&
		    ic[i].min_height <= size &&
		    size-ic[i].min_height & ic[i].height_inc == 0) {
		    Icon_Pixmap =		/* Size is perfect */
		      XCreateTile( XtDisplay(Dragon),
				   RootWindowOfScreen(XtScreen(Dragon)),
				   (size == 64
				    ? &dragon_icon64_bits[0]
				    : &dragon_icon32_bits[0]), 
				   size, size );
		}
	    }
	    if (Icon_Pixmap != (Pixmap)NULL || 	/* Stop on success */
		accept >= 0 ||			/* Stop on acceptable */
		size == 32) { break; }		/* Stop when exhausted */
	    size = 32;
	}

/*--If we don't have a pixmap yet and if accept is set then set up an "odd
 *  size" (from our viewpoint) pixmap. */

	if (Icon_Pixmap == (Pixmap)NULL && accept >= 0) {
	    char	*data;
	    char	*orig;
	    char	*ptr;
	    int		 w, wb, h, hb;
	    int		 inc;

/*--Figure out which of our pixmaps we will copy into this odd pixmap. */

	    if (ic[accept].max_width < 64 ||
		ic[accept].max_height < 64) {
		orig = &dragon_icon32_bits[0];
		size = 32 / 8;
	    } else {
		orig = &dragon_icon64_bits[0];
		size = 64 / 8;
	    }

/*--Calculate the exact size of the pixmap that we will be using; size is in
 *  bits (w,h) and also in bytes (wb,hb). */

	    w = ic[accept].min_width;
	    if (w < size) {
		inc = ic[accept].width_inc;
		w = w + (size - w + inc - 1) / inc * inc;
	    }
	    h = ic[accept].min_height;
	    if (h < size) {
		inc = ic[accept].height_inc;
		h = h + (size - h + inc - 1) / inc * inc;
	    }
	    wb = (w + 7) / 8;
	    hb = (h + 7) / 8;

/*--Allocate space for the pixmap and copy our existing pixmap into it. */

	    data = (char*)malloc( (unsigned)(wb * hb) );
	    for (ptr = data, nic = size;
		 nic >= 0;
		 ptr += wb, orig += size,--nic) {
		bcopy( orig, ptr, size );
	    }

/*--Create the pixmap and free up the data area. */

	    Icon_Pixmap =
	      XCreateTile( XtDisplay(Dragon),
			   RootWindowOfScreen(XtScreen(Dragon)),
			   data, w, h );
	    free( data );
	}
	XFree( ic );
    }

/*--If we managed to create a pixmap then use that.  Otherwise we need a window
 *  for our icon. */

    if (Icon_Pixmap != NULL) {
	DEBUG_OTHER(Icon_Setup,Icon Pixmap);
	SETARG( XtNiconPixmap, Icon_Pixmap );
    } else {

	/* No Pixmap found (or possibly none supported).  Try an Icon
	 * window instead. */

	static char	actions[] = "<Expose>: IconExpose()\n";
	XtActionsRec	SomeActions[1];
	Arg		SomeArgs[5];
	int		SomeArgsi;
	Widget		Icon_Shell;
	Widget		Icon_Core;

#define LCLARG(name,value) \
	if (SomeArgsi >= XtNumber(SomeArgs)) \
	  {fprintf(stderr,"IS SomeArgs overrun!\n");} \
	XtSetArg( SomeArgs[SomeArgsi], name,  value ); ++SomeArgsi;
        ;

/*--Create a shell to contain the Icon window. */

	DEBUG_OTHER(Icon_Setup,Icon Window);
	SomeArgsi = 0;
	LCLARG( XtNgeometry,		Dragon_Resources.Icon_Geometry);
	LCLARG( XtNmappedWhenManaged,	FALSE );

	Icon_Shell = XtCreateApplicationShell( "dragonicon", 
					       topLevelShellWidgetClass,
					       SomeArgs, (Cardinal)SomeArgsi );

/*--We want the Icon window to be 64x64 if possible; and, when the Icon window
 *  gets Expose events we want to call the IconExpose routine to redraw the
 *  window. */

	SomeActions[0].string = "IconExpose";
	SomeActions[0].proc   = (XtActionProc)Icon_Expose;
	XtAddActions( SomeActions, (Cardinal)1 );
	    
	SomeArgsi = 0;
	LCLARG( XtNtranslations,	XtParseTranslationTable( actions ) );

	Icon_Core = XtCreateManagedWidget( "drawable", widgetClass,
					   Icon_Shell,
					   SomeArgs, (Cardinal)SomeArgsi );
	if (flags & WidthValue) {
	    Icon_Core->core.width = W;
	}
	if (flags & HeightValue) {
	    Icon_Core->core.height = H;
	}

/*--Realize and use the Icon window. */

	XtRealizeWidget( Icon_Shell );
	SETARG( XtNiconWindow, XtWindow(Icon_Shell) );
    }
    DEBUG_RETURN(Icon_Setup);

} /* Icon_Setup */
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