public async Task Draw(int width, int height, Canvas2DContext canvas)
{
var index = 0;
for (var y = 0; y < _data.Height; ++y)
{
for (var x = 0; x < _data.Width; ++x, ++index)
{
var val = _data.Density[index];
if (val == 0)
{
continue;
}
//todo: highlight the visible rectangle.
bool inside = true;
var clr = ChooseColor(val);
if (!inside)
{
DarkenColor(clr);
}
await canvas.SetFillStyleAsync(ColorToString(clr));
await canvas.RectAsync(x, y, 1, 1);
}
}
}
protected override async Task OnAfterRenderAsync(bool firstRender)
{
_stopwatch.Start();
if (firstRender)
{
_ctx = await _canvas.CreateCanvas2DAsync();
await _ctx.SetFillStyleAsync("green");
await _ctx.SetStrokeStyleAsync("#777777");
await _ctx.SetLineWidthAsync(1);
}
await _ctx.ClearRectAsync(0, 0, GridSize *Scale, GridSize *Scale);
await _ctx.BeginPathAsync();
for (int i = 0; i <= Scale; ++i)
{
await _ctx.MoveToAsync(GridSize *i, 0);
await _ctx.LineToAsync(GridSize *i, GridSize *Scale);
await _ctx.MoveToAsync(0, GridSize *i);
await _ctx.LineToAsync(GridSize *Scale, GridSize *i);
}
for (int y = 0; y < Scale; ++y)
{
for (int x = 0; x < Scale; ++x)
{
if (_game.GetState(x, y))
{
await _ctx.RectAsync(x *GridSize + 1, y *GridSize + 1, GridSize - 2, GridSize - 2);
}
}
}
await _ctx.StrokeAsync();
await _ctx.FillAsync();
_stopwatch.Stop();
RenderCostInMilliSecond = _stopwatch.ElapsedMilliseconds;
_stopwatch.Reset();
}