private void OnPaintSurfaceDisabled(SKPaintSurfaceEventArgs e)
{
if (Source == null)
{
if (_bitmapDisabled == null || _centerDisabled == null)
{
var result = BuildBitmap("NPImage.Resources.disabled.9.png");
_bitmapDisabled = result.bitmap;
_centerDisabled = result.center;
}
}
else
{
if (_bitmapDisabled == null || _centerDisabled == null)
{
OnPaintSurfaceDefault(e);
return;
}
}
SKImageInfo info = e.Info;
SKSurface surface = e.Surface;
SKCanvas canvas = surface.Canvas;
canvas.DrawBitmapNinePatch(_bitmapDisabled, _centerDisabled, new SKRect(0, 0, e.Info.Width, e.Info.Height));
}
void OnCanvasViewPaintSurface(object sender, SKPaintSurfaceEventArgs args)
{
SKImageInfo info = args.Info;
SKSurface surface = args.Surface;
SKCanvas canvas = surface.Canvas;
canvas.Clear();
SKRectI centerRect = new SKRectI(100, 100, 400, 400);
canvas.DrawBitmapNinePatch(FiveByFiveBitmap, centerRect, info.Rect);
}
protected override void OnDrawSample(SKCanvas canvas, int width, int height)
{
canvas.Clear(SKColors.White);
using (var stream = new SKManagedStream(SampleMedia.Images.NinePatch))
using (var bitmap = SKBitmap.Decode(stream))
{
var patchCenter = new SKRectI(33, 33, 256 - 33, 256 - 33);
// 2x3 for portrait, or 3x2 for landscape
var land = width > height;
var min = land ? Math.Min(width / 3f, height / 2f) : Math.Min(width / 2f, height / 3f);
var wide = SKRect.Inflate(SKRect.Create(0, land ? min : (min * 2f), min * 2f, min), -20, -20);
var tall = SKRect.Inflate(SKRect.Create(land ? (min * 2f) : min, 0, min, min * 2f), -20, -20);
var square = SKRect.Inflate(SKRect.Create(0, 0, min, min), -20, -20);
var text = SKRect.Create(land ? min : 0, land ? 0 : min, min, min / 5f);
text.Offset(text.Width / 2f, text.Height * 1.5f);
text.Right = text.Left;
// draw the bitmaps
canvas.DrawBitmapNinePatch(bitmap, patchCenter, square);
canvas.DrawBitmapNinePatch(bitmap, patchCenter, tall);
canvas.DrawBitmapNinePatch(bitmap, patchCenter, wide);
// describe what we see
using (var paint = new SKPaint())
{
paint.IsAntialias = true;
paint.TextAlign = SKTextAlign.Center;
paint.TextSize = text.Height * 0.75f;
canvas.DrawText("The corners", text.Left, text.Top, paint);
text.Offset(0, text.Height);
canvas.DrawText("should always", text.Left, text.Top, paint);
text.Offset(0, text.Height);
canvas.DrawText("be square", text.Left, text.Top, paint);
}
}
}
protected override void OnPaintSurface(SKPaintSurfaceEventArgs e)
{
if (_bitmap == null || _center == null)
{
var result = BuildBitmap("NPImage.Resources.default.9.png");
_bitmap = result.bitmap;
_center = result.center;
}
SKImageInfo info = e.Info;
SKSurface surface = e.Surface;
SKCanvas canvas = surface.Canvas;
canvas.DrawBitmapNinePatch(_bitmap, _center, new SKRect(0, 0, e.Info.Width, e.Info.Height));
}
void OnCanvasViewPaintSurface(object sender, SKPaintSurfaceEventArgs args)
{
SKImageInfo info = args.Info;
SKSurface surface = args.Surface;
SKCanvas canvas = surface.Canvas;
canvas.Clear();
canvas.DrawBitmapNinePatch(buttonPressed ? bitmapPressed : bitmapReleased,
centerRect, info.Rect);
SKRect textBounds = new SKRect();
textPaint.MeasureText(Text, ref textBounds);
float xText = info.Width / 2 - textBounds.MidX;
float yText = info.Height / 2 - textBounds.MidY;
canvas.DrawText(Text, xText, yText, textPaint);
}
private void SKCanvasView_PaintSurface(object sender, SKPaintSurfaceEventArgs e)
{
System.Diagnostics.Trace.WriteLine($"SKCanvasView_PaintSurface {e.Info.Width}/{e.Info.Height} {resourceBitmap?.Width}/{resourceBitmap?.Height}");
SKImageInfo info = e.Info;
SKSurface surface = e.Surface;
SKCanvas canvas = surface.Canvas;
canvas.Clear();
if (resourceBitmap != null)
{
//canvas.DrawBitmap(resourceBitmap, new SKRect(0, 0, e.Info.Width, e.Info.Height));
System.Diagnostics.Debug.WriteLine($"外周を切り取る");
var croppedWidth = resourceBitmap.Width - 2;
var croppedHeight = resourceBitmap.Height - 2;
var croppedBitmap = new SKBitmap(croppedWidth, croppedHeight);
var croppedDst = new SKRect(0, 0, croppedWidth, croppedHeight);
var croppedSrc = new SKRect(1, 1, resourceBitmap.Width - 1, resourceBitmap.Height - 1);
using (var croppedCanvas = new SKCanvas(croppedBitmap))
{
croppedCanvas.DrawBitmap(resourceBitmap, croppedSrc, croppedDst);
}
System.Diagnostics.Debug.WriteLine($"中央のX座標を調べる");
var centerXs = new List <int>();
for (int i = 0; i < resourceBitmap.Width; i++)
{
var color = resourceBitmap.GetPixel(i, 0);
System.Diagnostics.Debug.WriteLine($"{i} {color.Alpha} {color.Red} {color.Green} {color.Blue} {color.Alpha != 0}");
if (i != 0 && color.Alpha != 0)
{
centerXs.Add(i - 1);
}
}
System.Diagnostics.Debug.WriteLine($"中央のY座標を調べる");
var centerYs = new List <int>();
for (int i = 0; i < resourceBitmap.Height; i++)
{
var color = resourceBitmap.GetPixel(0, i);
System.Diagnostics.Debug.WriteLine($"{i} {color.Alpha} {color.Red} {color.Green} {color.Blue} {color.Alpha != 0}");
if (i != 0 && color.Alpha != 0)
{
centerYs.Add(i - 1);
}
}
System.Diagnostics.Debug.WriteLine($"中央の座標を決定する");
int left = (centerXs.Count > 0) ? centerXs.Min() : 0;
int top = (centerYs.Count > 0) ? centerYs.Min() : 0;
int right = (centerXs.Count > 0) ? centerXs.Max() : 0;
int bottom = (centerYs.Count > 0) ? centerYs.Max() : 0;
System.Diagnostics.Debug.WriteLine($"{left} {top} {right} {bottom}");
// 調整
if (left == right)
{
right = left + 1;
}
if (top == bottom)
{
bottom = top + 1;
}
System.Diagnostics.Debug.WriteLine($"切り取った画像を貼る");
var dst = new SKRect(0, 0, e.Info.Width, e.Info.Height);
var center = new SKRectI(left, top, right, bottom);
canvas.DrawBitmapNinePatch(croppedBitmap, center, dst);
}
}