Method drawBitmapCanvas

examples/scenes/src/BitmapScene.java:83–119

(Canvas canvas, IRect target, float dpi)

    }

    private void drawBitmapCanvas(Canvas canvas, IRect target, float dpi) {
        try (var bitmap = new Bitmap();
             var path = new PathBuilder().moveTo(0, target.getHeight() / 2)
                                         .lineTo(target.getWidth() / 2, target.getHeight() / 2 - target.getWidth() / 2)
                                         .lineTo(target.getWidth(), target.getHeight() / 2)
                                         .lineTo(target.getWidth() / 2, target.getHeight() / 2 + target.getWidth() / 2)
                                         .closePath()
                                         .build();
             var stroke = new Paint().setColor(0xFFe76f51).setMode(PaintMode.STROKE).setStrokeWidth(10);)
        {
            bitmap.allocPixels(ImageInfo.makeS32((int) (target.getWidth() * dpi), (int) (target.getHeight() * dpi), ColorAlphaType.PREMUL));
            
            bitmap.erase(0x80a8dadc);
            int color = bitmap.getColor(10, 10);
            assert 0x80a7d9db == color : "Expected 0x" + Integer.toString(0x80a7d9db, 16) + ", got 0x" + Integer.toString(color, 16);
            float alpha = bitmap.getAlphaf(10, 10);
            assert Math.abs(0.5f - alpha) < 0.01 : "Expected 0.5f, got " + alpha;

            bitmap.erase(0x00FFFFFF, IRect.makeXYWH((int) ((target.getWidth() / 2 - 10) * dpi), (int) ((target.getHeight() / 2 - 10) * dpi), (int) (20 * dpi), (int) (20 * dpi)));
            color = bitmap.getColor((int) (target.getWidth() / 2 * dpi), (int) (target.getHeight() / 2 * dpi));
            assert 0x00000000 == color : "Expected 0x" + Integer.toString(0x00000000, 16) + ", got 0x" + Integer.toString(color, 16);
            alpha = bitmap.getAlphaf((int) (target.getWidth() / 2 * dpi), (int) (target.getHeight() / 2 * dpi));
            assert Math.abs(0f - alpha) < 0.01 : "Expected 0f, got " + alpha;

            Canvas canvas2 = new Canvas(bitmap);
            canvas2.scale(dpi, dpi);
            canvas2.drawPath(path, stroke);

            try (Image image = Image.makeRasterFromBitmap(bitmap.setImmutable())) {
                canvas.drawImageRect(image, target.toRect());
            }
        }

        try(var stroke = new Paint().setColor(0xFFE5E5E5).setMode(PaintMode.STROKE).setStrokeWidth(1);) {
            canvas.drawRect(target.toRect(), stroke);
        }
    }

    public void drawPixels(Canvas canvas, IRect target, IRect screen, float dpi) {
        target = target.intersect(screen);