/* fillarea.c 1.1 */
/*
    Copyright 1992, 1993 O'Reilly and Associates, Inc.  Permission to
    use, copy, and modify this program is hereby granted, as long as
    this copyright notice appears in each copy of the program source
    code.
*/

#include "book_utils.h"

#define WIN_GEOM	"500x500+50+50"

/* Structure ID */
static PEXStructure	struct_id;

/* Miscellaneous constants we use. */
#define NUM_CURVE_SEGMENTS	40
#define X_START			0.1
#define X_SIZE			0.2
#define Y_START			0.75
#define Y_SIZE			0.05

static PEXCoord2D chevron[]  = {{.1,.3},{.2,.35},{.3,.3},{.2,.5}};
static PEXCoord2D octagon[]  = {{.4,.45},{.45,.4},{.55,.4}, {.6,.45},
				{.6,.55},{.55,.6}, {.45,.6},{.4,.55}};
static PEXCoord2D keyhole[]  = {{.7,.3},{.9,.3},{.9,.5},{.7,.5},
				{.8,.35},{.84,.4},{.8,.45}};
static PEXCoord   bowtie[] = {{.7,.8,.5},{.7,.7,.5},{.9,.8,.5},
			      {.9,.7,.5}};

static void
create_structure( dpy )
    Display	*dpy;
{
    PEXColor		color;
    PEXCoord2D		curve[NUM_CURVE_SEGMENTS + 1];
    double		dx, angle;
    int			i;
    
    /* Create the structure. */
    struct_id = PEXCreateStructure( dpy );

    /* Generate the points for the sine curve. */
    dx = X_SIZE / NUM_CURVE_SEGMENTS;
    curve[0].x = X_START; curve[0].y = Y_START;
    for ( i = 1; i <= NUM_CURVE_SEGMENTS; i++ ) {
	curve[i].x = curve[i-1].x + dx;
	angle = ((curve[i].x - X_START) / X_SIZE) * 2 * M_PI;
	curve[i].y = Y_START + Y_SIZE * sin( angle );
    }

    /* Set the interior style and color. */
    PEXSetInteriorStyle( dpy, struct_id, PEXOCStore,
			 PEXInteriorStyleSolid );
    SET_COLOR( 1, 1, 1, color ); /* white */
    PEXSetSurfaceColor( dpy, struct_id, PEXOCStore,
		        PEXColorTypeRGB, &color );
	
    /* Distinguish between front and back faces. */
    PEXSetFacetDistinguishFlag( dpy, struct_id, PEXOCStore, True );
    
    /* Set the back interior style and color. */
    PEXSetBFInteriorStyle( dpy, struct_id, PEXOCStore,
			   PEXInteriorStyleSolid );
    SET_COLOR( 1, 1, 0, color ); /* yellow */
    PEXSetBFSurfaceColor( dpy, struct_id, PEXOCStore,
			  PEXColorTypeRGB, &color );
    
    /* Create the fill area for the "curve." */
    PEXFillArea2D( dpy, struct_id, PEXOCStore, PEXShapeComplex,
		   True, NUM_CURVE_SEGMENTS + 1, curve );
    
    /* Create the fill area for the chevron. */
    PEXFillArea2D( dpy, struct_id, PEXOCStore, PEXShapeNonConvex,
		   True, 4, chevron );
    
    /* Create the fill area for the octagon. */
    PEXFillArea2D( dpy, struct_id, PEXOCStore, PEXShapeConvex,
		   True, 8, octagon );
    
    /* Create the fill area for the key hole. */
    PEXFillArea2D( dpy, struct_id, PEXOCStore, PEXShapeComplex,
		   True, 7, keyhole );
    
    /* Create a 3D fill area for the bow tie. */
    PEXFillArea( dpy, struct_id, PEXOCStore, PEXShapeComplex,
		 True, 4, bowtie );
}

static void
redraw( dpy, window, renderer )
    Display	*dpy;
    Window	window;
    PEXRenderer	renderer;
{
    XClearWindow( dpy, window );
    PEXRenderNetwork( dpy, window, renderer, struct_id );
    XFlush( dpy );
}

main( argc, argv )
    int		argc;
    char	*argv[];
{
    Display			*dpy;
    Window			window;
    XEvent			event;
    XVisualInfo			vis_info;
    XColor			bkgd_color;
    XStandardColormap		cmap_info;
    PEXColorApproxEntry		capx_info;
    PEXRenderer			renderer;
    PEXRendererAttributes	rattrs;
    PEXExtensionInfo		*pexinfo;
    int				done = 0;
    
    /* Open a display and initialize PEX. */
    dpy = ora_init_pex( argv, &pexinfo );
    if ( !dpy ) exit(1);
    
    /* Determine the best visual to use. */
    ora_find_best_visual( dpy, &vis_info );
    
    /* Get a standard colormap for the visual. */
    if ( !ora_get_standard_colormap( dpy, &vis_info, &cmap_info ) ) {
	fprintf ( stderr, "Cannot find a standard colormap\n" );
	exit(1);
    }
    ora_set_stdcmap_approx( &vis_info, &cmap_info, &capx_info );

    /* Create the window, giving it a gray background. */
    bkgd_color.red = bkgd_color.green = bkgd_color.blue = 0x5555;
    bkgd_color.flags = DoRed | DoGreen | DoBlue;
    window = ora_create_window( dpy, &vis_info, &cmap_info, WIN_GEOM,
			        &bkgd_color );
    
    /* Create the structure and Set up the PEX renderer. */
    if ( STRUCTURE_SPT( pexinfo ) ) {
	create_structure( dpy );
	renderer = ora_setup_renderer( dpy, window, &capx_info,
				       &rattrs );
    } else {
	fprintf( stderr, "Structures not supported.\n" );
	exit(1);
    }
    
    /* Read and respond to X events. */
    XSelectInput( dpy, window, ExposureMask | ButtonPressMask );
    while ( !done ) {
	XNextEvent( dpy, &event );
	switch ( event.type ) {
	case Expose:
	    /* Flush remaining Expose events, then redraw. */
	    while ( XCheckTypedWindowEvent( dpy, window,
					    Expose, &event ) )
		; /* empty statement */
	    redraw( dpy, window, renderer );
	    break;
	case ButtonPress:
	    done = 1;
	    break;
	}
    }

    XCloseDisplay( dpy );
    return 0;
}