private void grid(ICanvasRenderingContext2D ctx, int w, int h, int size, int unit, string color, string color2)
{
int x, y, i, j;
for (i = 0, x = size; x < w; ++i, x += size)
{
ctx.beginPath();
ctx.strokeStyle = (i%unit != 0) ? color : color2;
ctx.moveTo(x, 0);
ctx.lineTo(x, h);
ctx.stroke();
ctx.closePath();
}
for (j = 0, y = size; y < h; ++j, y += size)
{
ctx.beginPath();
ctx.strokeStyle = (j%unit != 0) ? color : color2;
ctx.moveTo(0, y);
ctx.lineTo(w, y);
ctx.stroke();
ctx.closePath();
}
}
private void drawStar(ICanvasRenderingContext2D ctx, int r)
{
ctx.save();
ctx.beginPath();
ctx.moveTo(r, 0);
for (int i = 0; i < 9; i++)
{
ctx.rotate(Math.PI/5);
if (i%2 == 0)
{
ctx.lineTo((r/0.525731)*0.200811, 0);
}
else
{
ctx.lineTo(r, 0);
}
}
ctx.closePath();
ctx.fill();
ctx.restore();
}
private string TextPositions(ICanvasRenderingContext2D ctx)
{
int i, j;
string text = "Hello world";
var align = new[] {"left", "center", "right"};
var baseline = new[] {"top", "hanging", "middle", "alphabetic", "ideographic", "bottom"};
ctx.fillStyle = "#000";
ctx.strokeStyle = "#f00";
ctx.font = "20px Arial";
ctx.translate(70, 30);
for (i = 0; i < align.Length; i++)
{
for (j = 0; j < baseline.Length; j++)
{
ctx.save();
ctx.translate(i*170 + 0.5, j*50 + 0.5);
ctx.textAlign = align[i];
ctx.textBaseLine = baseline[j];
ctx.fillText(text, 0, 0);
ctx.beginPath();
ctx.moveTo(-50, 0);
ctx.lineTo(50, 0);
ctx.moveTo(0, -10);
ctx.lineTo(0, 10);
ctx.closePath();
ctx.stroke();
ctx.restore();
}
}
return @"Originals\Text\TextPositions.png";
}