duktape-nspire/examples/xts_test.js.tns

// Xtase drawing routines demo

var t = require('nsp/texture');
var k = require('nsp/keys');

var width = 320;
var height = 240;

var screen = new t.Texture(width, height);
screen.fill(0x0000);


print(width+"x"+height+" press Enter");
k.waitKeyPressed();



var time_start = Date.now();
screen.fill(0x0000);


var RED   = 31 << 11 |  0 << 5 |   0;
var GREEN =  0 << 11 | 31 << 5 |   0;
var BLUE  =  0 << 11 |  0 << 5 |  31;
var PINK  = 31 << 11 |  0 << 5 |  31;


//                                   R        G       B
screen.drawLine(0,0,width,height, 31 << 11 | 31 << 5 | 31 );

screen.drawRect(50,50,100,70, RED );
screen.fillRect(50+20,50+20,100,70, GREEN );

var pts = [ 200, 40,//
				220, 60,//
				220, 80,//
				200, 120,//
				180, 80, //
		];
// screen.drawPolyLines(pts, pts.length/2, GREEN);
screen.fillPolygon(pts, pts.length / 2, BLUE);

pts = [ 200, 40,//
				220 + 30, 60,//
				220 + 30, 80,//
				200 + 30, 120,//
				180 + 30, 80, //
				210 + 30, 70, //
		];
screen.fillPolygon(pts, pts.length / 2, GREEN);
screen.drawPolyLines(pts, pts.length/2, RED);


var SCREEN_WIDTH = width;
var SCREEN_HEIGHT = height;

screen.drawCircle(SCREEN_WIDTH / 2, SCREEN_HEIGHT / 2, 20, RED);
screen.fillCircle(SCREEN_WIDTH - 10, SCREEN_HEIGHT / 2, 20, PINK);

for(var i=0; i < SCREEN_WIDTH / 40; i++) {
  screen.fillCircle( (i*40)+20, SCREEN_HEIGHT -40, 20, PINK);
}

screen.display();

print(width+"x"+height+" in "+(Date.now()-time_start)+" msec.");
k.waitKeyPressed();