Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
import 'dart:typed_data';
import 'dart:ui';
class FoundationWindow {
static final double devicePixelRatio = window.devicePixelRatio;
static final Size physicalSize = window.physicalSize;
static final Float64List deviceTransform = new Float64List(16)
..[0] = window.devicePixelRatio
..[5] = window.devicePixelRatio
..[10] = 1.0
..[15] = 1.0;
static final paintBounds = Offset.zero & window.physicalSize;
int _tick = 0;
get tick => _tick;
Image snapShot;
Function(Canvas canvas) onUpdateFrame;
FoundationWindow(this.onUpdateFrame) {
window.onBeginFrame = onBeginFrame;
window.scheduleFrame();
}
void onBeginFrame(Duration timeStamp) {
_tick++;
// PreProcess : Create Canvas
final recorder = new PictureRecorder();
final canvas = new Canvas(recorder, paintBounds);
// Draw by Outside
onUpdateFrame(canvas);
// PostProcess : Capture
final picture = recorder.endRecording();
snapShot = picture.toImage(
physicalSize.width.toInt(), physicalSize.height.toInt());
// composite
final sceneBuilder = new SceneBuilder()
..pushTransform(deviceTransform)
..addPicture(Offset.zero, picture)
..pop();
window.render(sceneBuilder.build());
window.scheduleFrame();
}
static void drawGuid(Canvas canv) {
const size = 600.0;
var paint = Paint()
..color = Color.fromARGB(255, 0xFF, 22, 22)
//..blendMode = BlendMode.multiply
..style = PaintingStyle.stroke;
canv.drawRect(Rect.fromLTWH(0.0, 0.0, size, size), paint);
paint.color = Color.fromARGB(255, 0xAA, 0xAA, 0xAA);
var step = 10.0;
var l = size / step;
for (var i = 0; i < l; i++) {
if (i % 5 == 0) {
paint.color = Color.fromARGB(255, 0xFF, 0x99, 0x99);
} else {
paint.color = Color.fromARGB(255, 0xAA, 0xAA, 0xAA);
}
canv.drawLine(Offset(step * i, 0.0), Offset(step * i, size), paint);
canv.drawLine(Offset(0.0, step * i), Offset(size, step * i), paint);
}
}
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.