Java Code Examples for android.graphics.Picture#beginRecording()

/**
 * Creates an overlay with a background color and a thumbnail for the cross profile apps
 * animation.
 */
GraphicBuffer createCrossProfileAppsThumbnail(
        @DrawableRes int thumbnailDrawableRes, Rect frame) {
    final int width = frame.width();
    final int height = frame.height();

    final Picture picture = new Picture();
    final Canvas canvas = picture.beginRecording(width, height);
    canvas.drawColor(Color.argb(0.6f, 0, 0, 0));
    final int thumbnailSize = mService.mContext.getResources().getDimensionPixelSize(
            com.android.internal.R.dimen.cross_profile_apps_thumbnail_size);
    final Drawable drawable = mService.mContext.getDrawable(thumbnailDrawableRes);
    drawable.setBounds(
            (width - thumbnailSize) / 2,
            (height - thumbnailSize) / 2,
            (width + thumbnailSize) / 2,
            (height + thumbnailSize) / 2);
    drawable.setTint(mContext.getColor(android.R.color.white));
    drawable.draw(canvas);
    picture.endRecording();

    return Bitmap.createBitmap(picture).createGraphicBufferHandle();
}
 

/**
 * 绘制坐标系
 *
 * @param coo     坐标系原点
 * @param winSize 屏幕尺寸
 * @param winSize 屏幕尺寸
 */
private static Picture getCoo(Point coo, Point winSize, boolean showText) {
    Picture picture = new Picture();
    Canvas recording = picture.beginRecording(winSize.x, winSize.y);
    //初始化网格画笔
    Paint paint = new Paint();
    paint.setStrokeWidth(3);
    paint.setColor(Color.BLACK);
    paint.setStyle(Paint.Style.STROKE);
    //设置虚线效果new float[]{可见长度, 不可见长度},偏移值
    paint.setPathEffect(null);

    //绘制直线
    recording.drawPath(HelpPath.cooPath(coo, winSize), paint);
    //左箭头
    recording.drawLine(winSize.x, coo.y, winSize.x - 40, coo.y - 20, paint);
    recording.drawLine(winSize.x, coo.y, winSize.x - 40, coo.y + 20, paint);
    //下箭头
    recording.drawLine(coo.x, winSize.y, coo.x - 20, winSize.y - 40, paint);
    recording.drawLine(coo.x, winSize.y, coo.x + 20, winSize.y - 40, paint);
    //为坐标系绘制文字
    if (showText) {
        drawText4Coo(recording, coo, winSize, paint);
    }
    return picture;
}
 

@SuppressWarnings({"WeakerAccess", "unused"})
public Picture  renderToPicture(int widthInPixels, int heightInPixels, RenderOptions renderOptions)
{
   Picture  picture = new Picture();
   Canvas   canvas = picture.beginRecording(widthInPixels, heightInPixels);

   if (renderOptions == null || renderOptions.viewPort == null) {
      renderOptions = (renderOptions == null) ? new RenderOptions() : new RenderOptions(renderOptions);
      renderOptions.viewPort(0f, 0f, (float) widthInPixels, (float) heightInPixels);
   }

   SVGAndroidRenderer  renderer = new SVGAndroidRenderer(canvas, this.renderDPI);

   renderer.renderDocument(this, renderOptions);

   picture.endRecording();
   return picture;
}
 

@SuppressWarnings({"WeakerAccess", "unused"})
public Picture  renderViewToPicture(String viewId, int widthInPixels, int heightInPixels)
{
   RenderOptions  renderOptions = new RenderOptions();
   renderOptions.view(viewId)
                .viewPort(0f, 0f, (float) widthInPixels, (float) heightInPixels);

   Picture  picture = new Picture();
   Canvas   canvas = picture.beginRecording(widthInPixels, heightInPixels);

   SVGAndroidRenderer  renderer = new SVGAndroidRenderer(canvas, this.renderDPI);

   renderer.renderDocument(this, renderOptions);

   picture.endRecording();
   return picture;
}
 

/**
 * Renders this SVG document to a Picture object using the specified view defined in the document.
 * <p/>
 * A View is an special element in a SVG document that describes a rectangular area in the document.
 * Calling this method with a {@code viewId} will result in the specified view being positioned and scaled
 * to the viewport.  In other words, use {@link #renderToPicture()} to render the whole document, or use this
 * method instead to render just a part of it.
 *
 * @param viewId         the id of a view element in the document that defines which section of the document is to
 *                       be visible.
 * @param widthInPixels  the width of the initial viewport
 * @param heightInPixels the height of the initial viewport
 * @return a Picture object suitable for later rendering using {@code Canvas.drawPicture()},
 * or null if the viewId was not found.
 */
public Picture renderViewToPicture(String viewId, int widthInPixels, int heightInPixels) {
    SvgObject obj = this.getElementById(viewId);
    if (obj == null)
        return null;
    if (!(obj instanceof SVG.View))
        return null;

    SVG.View view = (SVG.View) obj;

    if (view.viewBox == null) {
        Log.w(TAG, "View element is missing a viewBox attribute.");
        return null;
    }

    Picture picture = new Picture();
    Canvas canvas = picture.beginRecording(widthInPixels, heightInPixels);
    Box viewPort = new Box(0f, 0f, (float) widthInPixels, (float) heightInPixels);

    SVGAndroidRenderer renderer = new SVGAndroidRenderer(canvas, viewPort, this.renderDPI);

    renderer.renderDocument(this, view.viewBox, view.preserveAspectRatio, false);

    picture.endRecording();
    return picture;
}
 

/**
 * Get a copy of bitmap of given drawable, return null if intrinsic size is zero
 */
public static Bitmap createDrawableBitmap(Drawable drawable, View hostView) {
    int width = drawable.getIntrinsicWidth();
    int height = drawable.getIntrinsicHeight();
    if (width <= 0 || height <= 0) {
        return null;
    }
    float scale = Math.min(1f, ((float)MAX_IMAGE_SIZE) / (width * height));
    if (drawable instanceof BitmapDrawable && scale == 1f) {
        // return same bitmap if scale down not needed
        return ((BitmapDrawable) drawable).getBitmap();
    }
    int bitmapWidth = (int) (width * scale);
    int bitmapHeight = (int) (height * scale);
    final Picture picture = new Picture();
    final Canvas canvas = picture.beginRecording(width, height);
    // Do stuff with the canvas
    Rect existingBounds = drawable.getBounds();
    int left = existingBounds.left;
    int top = existingBounds.top;
    int right = existingBounds.right;
    int bottom = existingBounds.bottom;
    drawable.setBounds(0, 0, bitmapWidth, bitmapHeight);
    drawable.draw(canvas);
    drawable.setBounds(left, top, right, bottom);
    picture.endRecording();
    return Bitmap.createBitmap(picture);
}
 

/**
 * 绘制网格
 *
 * @param winSize 屏幕尺寸
 */
private static Picture getGrid(Point winSize) {

    Picture picture = new Picture();
    Canvas recording = picture.beginRecording(winSize.x, winSize.y);
    Paint paint = getHelpPint();

    recording.drawPath(HelpPath.gridPath(50, winSize), paint);
    return picture;

}
 

/**
 * Renders this SVG document to a Picture object.
 * 
 * @param widthInPixels the width of the initial viewport
 * @param heightInPixels the height of the initial viewport
 * @return a Picture object suitable for later rendering using {@code Canvas.darwPicture()}
 */
public Picture  renderToPicture(int widthInPixels, int heightInPixels)
{
   Picture  picture = new Picture();
   Canvas   canvas = picture.beginRecording(widthInPixels, heightInPixels);
   Box      viewPort = new Box(0f, 0f, (float) widthInPixels, (float) heightInPixels);

   SVGAndroidRenderer  renderer = new SVGAndroidRenderer(canvas, viewPort, this.renderDPI);

   renderer.renderDocument(this, null, null, false);

   picture.endRecording();
   return picture;
}
 

/**
 * Renders this SVG document to a Picture object using the specified view defined in the document.
 * <p>
 * A View is an special element in a SVG document that describes a rectangular area in the document.
 * Calling this method with a {@code viewId} will result in the specified view being positioned and scaled
 * to the viewport.  In other words, use {@link #renderToPicture()} to render the whole document, or use this
 * method instead to render just a part of it.
 * 
 * @param viewId the id of a view element in the document that defines which section of the document is to be visible.
 * @param widthInPixels the width of the initial viewport
 * @param heightInPixels the height of the initial viewport
 * @return a Picture object suitable for later rendering using {@code Canvas.drawPicture()}, or null if the viewId was not found.
 */
public Picture  renderViewToPicture(String viewId, int widthInPixels, int heightInPixels)
{
   SvgObject  obj = this.getElementById(viewId);
   if (obj == null)
      return null;
   if (!(obj instanceof SVG.View))
      return null;

   SVG.View  view = (SVG.View) obj;
   
   if (view.viewBox == null) {
      Log.w(TAG, "View element is missing a viewBox attribute.");
      return null;
   }

   Picture  picture = new Picture();
   Canvas   canvas = picture.beginRecording(widthInPixels, heightInPixels);
   Box      viewPort = new Box(0f, 0f, (float) widthInPixels, (float) heightInPixels);

   SVGAndroidRenderer  renderer = new SVGAndroidRenderer(canvas, viewPort, this.renderDPI);

   renderer.renderDocument(this, view.viewBox, view.preserveAspectRatio, false);

   picture.endRecording();
   return picture;
}
 

/**
 * bitmap to picture
 *
 * @param bitmap
 * @return
 */
public static Picture getPictureFromBitmap(Bitmap bitmap) {
    Picture picture = new Picture();
    Canvas canvas = picture.beginRecording(bitmap.getWidth(),
            bitmap.getHeight());
    canvas.drawBitmap(
            bitmap,
            null,
            new RectF(0f, 0f, (float) bitmap.getWidth(), (float) bitmap
                    .getHeight()), null);
    picture.endRecording();
    return picture;
}
 

/**
 * Renders this SVG document to a Picture object.
 *
 * @param widthInPixels  the width of the initial viewport
 * @param heightInPixels the height of the initial viewport
 * @return a Picture object suitable for later rendering using {@code Canvas.darwPicture()}
 */
public Picture renderToPicture(int widthInPixels, int heightInPixels) {
    Picture picture = new Picture();
    Canvas canvas = picture.beginRecording(widthInPixels, heightInPixels);
    Box viewPort = new Box(0f, 0f, (float) widthInPixels, (float) heightInPixels);

    SVGAndroidRenderer renderer = new SVGAndroidRenderer(canvas, viewPort, this.renderDPI);

    renderer.renderDocument(this, null, null, false);

    picture.endRecording();
    return picture;
}
 

public Picture renderToImage(Rect bounds) {
    if (document != null) {
        Picture image = new Picture();
        try {
            Canvas c = image.beginRecording(bounds.width(), bounds.height());
            document.render(c);
        } catch (Exception ioe) {
            PXLog.e(TAG, ioe, "Error rendering to image");
        } finally {
            image.endRecording();
        }
        return image;
    }
    return null;
}
 

/**
 * Creates a new Picture that records drawing a provided bitmap.
 * Will return an empty Picture if the Bitmap is null.
 */
@CalledByNative
private static Picture recordBitmapIntoPicture(Bitmap bitmap) {
    Picture picture = new Picture();
    if (bitmap != null) {
        Canvas recordingCanvas = picture.beginRecording(bitmap.getWidth(), bitmap.getHeight());
        drawBitmapIntoCanvas(bitmap, recordingCanvas, 0, 0);
        picture.endRecording();
    }
    return picture;
}
 

/**
 * Creates a new Picture that records drawing a provided bitmap.
 * Will return an empty Picture if the Bitmap is null.
 */
@CalledByNative
private static Picture recordBitmapIntoPicture(Bitmap bitmap) {
    Picture picture = new Picture();
    if (bitmap != null) {
        Canvas recordingCanvas = picture.beginRecording(bitmap.getWidth(), bitmap.getHeight());
        drawBitmapIntoCanvas(bitmap, recordingCanvas, 0, 0);
        picture.endRecording();
    }
    return picture;
}
 

@Override
public Canvas getCanvas(View view, int width, int height) {
    mPicture = new Picture();
    return mPicture.beginRecording(width, height);
}
 

private Drawable rasterizeSVG(MapMarker aiMarker, SVG markerSvg) {
  SVG.Svg svg = markerSvg.getRootElement();
  final float density = view.getContext().getResources().getDisplayMetrics().density;
  float height = aiMarker.Height() <= 0 ? getBestGuessHeight(svg) : aiMarker.Height();
  float width = aiMarker.Width() <= 0 ? getBestGuessWidth(svg) : aiMarker.Width();
  float scaleH = height / getBestGuessHeight(svg);
  float scaleW = width / getBestGuessWidth(svg);
  float scale = (float) Math.sqrt(scaleH * scaleH + scaleW * scaleW);

  // update fill color of SVG <path>
  Paint fillPaint = new Paint();
  Paint strokePaint = new Paint();
  PaintUtil.changePaint(fillPaint, aiMarker.FillColor());
  PaintUtil.changePaint(strokePaint, aiMarker.StrokeColor());
  SVG.Length strokeWidth = new SVG.Length(aiMarker.StrokeWidth() / scale);
  for (SVG.SvgObject element : svg.getChildren()) {
    if (element instanceof SVG.SvgConditionalElement) {
      SVG.SvgConditionalElement path = (SVG.SvgConditionalElement) element;
      path.baseStyle.fill = new SVG.Colour(fillPaint.getColor());
      path.baseStyle.fillOpacity = fillPaint.getAlpha()/255.0f;
      path.baseStyle.stroke = new SVG.Colour(strokePaint.getColor());
      path.baseStyle.strokeOpacity = strokePaint.getAlpha()/255.0f;
      path.baseStyle.strokeWidth = strokeWidth;
      path.baseStyle.specifiedFlags = 0x3d;
      if (path.style != null) {
        if ((path.style.specifiedFlags & SPECIFIED_FILL) == 0) {
          path.style.fill = new SVG.Colour(fillPaint.getColor());
          path.style.specifiedFlags |= SPECIFIED_FILL;
        }
        if ((path.style.specifiedFlags & SPECIFIED_FILL_OPACITY) == 0) {
          path.style.fillOpacity = fillPaint.getAlpha()/255.0f;
          path.style.specifiedFlags |= SPECIFIED_FILL_OPACITY;
        }
        if ((path.style.specifiedFlags & SPECIFIED_STROKE) == 0) {
          path.style.stroke = new SVG.Colour(strokePaint.getColor());
          path.style.specifiedFlags |= SPECIFIED_STROKE;
        }
        if ((path.style.specifiedFlags & SPECIFIED_STROKE_OPACITY) == 0) {
          path.style.strokeOpacity = strokePaint.getAlpha()/255.0f;
          path.style.specifiedFlags |= SPECIFIED_STROKE_OPACITY;
        }
        if ((path.style.specifiedFlags & SPECIFIED_STROKE_WIDTH) == 0) {
          path.style.strokeWidth = strokeWidth;
          path.style.specifiedFlags |= SPECIFIED_STROKE_WIDTH;
        }
      }
    }
  }

  // draw SVG to Picture and create a BitmapDrawable for rendering
  Picture picture = markerSvg.renderToPicture();
  Picture scaledPicture = new Picture();
  Canvas canvas = scaledPicture.beginRecording((int)((width + 2.0f * aiMarker.StrokeWidth()) * density),
      (int)((height + 2.0f * aiMarker.StrokeWidth()) * density));
  canvas.scale(density * scaleW, density * scaleH);
  canvas.translate(strokeWidth.floatValue(), strokeWidth.floatValue());
  picture.draw(canvas);
  scaledPicture.endRecording();
  return new PictureDrawable(scaledPicture);
}