android/src/com/android/tools/idea/rendering/ShadowPainter.java - platform/tools/adt/idea - Git at Google

 /*
  * Copyright (C) 2013 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 package com.android.tools.idea.rendering;

 import com.intellij.util.ui.UIUtil;
 import org.jetbrains.annotations.NotNull;

 import java.awt.*;
 import java.awt.image.BufferedImage;
 import java.awt.image.DataBufferInt;

 public class ShadowPainter {

   /**
    * Adds a drop shadow to a semi-transparent image (of an arbitrary shape) and returns it as a new image.
    * This method attempts to mimic the same visual characteristics as the rectangular shadow painting
    * methods in this class, {@link #createRectangularDropShadow(java.awt.image.BufferedImage)} and
    * {@link #createSmallRectangularDropShadow(java.awt.image.BufferedImage)}.
    *
    * @param source the source image
    * @param shadowSize the size of the shadow, normally {@link #SHADOW_SIZE or {@link #SMALL_SHADOW_SIZE}}
    * @return a new image with the shadow painted in
    */
   @NotNull
   public static BufferedImage createDropShadow(BufferedImage source, int shadowSize) {
     shadowSize /= 2; // make shadow size have the same meaning as in the other shadow paint methods in this class

     return createDropShadow(source, shadowSize, 0.7f, 0);
   }

   /**
    * Creates a drop shadow of a given image and returns a new image which shows the
    * input image on top of its drop shadow.
    * <p>
    * <b>NOTE: If the shape is rectangular and opaque, consider using
    * {@link #drawRectangleShadow(java.awt.Graphics, int, int, int, int)} instead.</b>
    *
    * @param source the source image to be shadowed
    * @param shadowSize the size of the shadow in pixels
    * @param shadowOpacity the opacity of the shadow, with 0=transparent and 1=opaque
    * @param shadowRgb the RGB int to use for the shadow color
    * @return a new image with the source image on top of its shadow
    */
   @SuppressWarnings({"AssignmentToForLoopParameter", "UnnecessaryLocalVariable",   // Imported code
                       "SuspiciousNameCombination", "UnusedAssignment"})
   public static BufferedImage createDropShadow(BufferedImage source, int shadowSize,
                                                float shadowOpacity, int shadowRgb) {

     // This code is based on
     //      http://www.jroller.com/gfx/entry/non_rectangular_shadow

     BufferedImage image;
     int width = source.getWidth();
     int height = source.getHeight();
     boolean isRetina = ImageUtils.isRetinaImage(source);
     if (isRetina && UIUtil.isAppleRetina()) {
       // This shadow painting code doesn't work right with the Apple JDK 6 Retina support.
       // Since this code isn't used very frequently, just skip the drop shadows for now
       return source;
     }
     if (isRetina) {
       image = ImageUtils.createDipImage(width + SHADOW_SIZE, height + SHADOW_SIZE, BufferedImage.TYPE_INT_ARGB);
     } else {
       //noinspection UndesirableClassUsage
       image = new BufferedImage(width + SHADOW_SIZE, height + SHADOW_SIZE, BufferedImage.TYPE_INT_ARGB);
     }

     Graphics2D g2 = image.createGraphics();
     //noinspection ConstantConditions
     UIUtil.drawImage(g2, source, shadowSize, shadowSize, null);

     int dstWidth = image.getWidth();
     int dstHeight = image.getHeight();

     int left = (shadowSize - 1) >> 1;
     int right = shadowSize - left;
     int xStart = left;
     int xStop = dstWidth - right;
     int yStart = left;
     int yStop = dstHeight - right;

     shadowRgb &= 0x00FFFFFF;

     int[] aHistory = new int[shadowSize];
     int historyIdx = 0;

     int aSum;

     int[] dataBuffer = ((DataBufferInt) image.getRaster().getDataBuffer()).getData();
     int lastPixelOffset = right * dstWidth;
     float sumDivider = shadowOpacity / shadowSize;

     // horizontal pass
     for (int y = 0, bufferOffset = 0; y < dstHeight; y++, bufferOffset = y * dstWidth) {
       aSum = 0;
       historyIdx = 0;
       for (int x = 0; x < shadowSize; x++, bufferOffset++) {
         int a = dataBuffer[bufferOffset] >>> 24;
         aHistory[x] = a;
         aSum += a;
       }

       bufferOffset -= right;

       for (int x = xStart; x < xStop; x++, bufferOffset++) {
         int a = (int) (aSum * sumDivider);
         dataBuffer[bufferOffset] = a << 24 | shadowRgb;

         // subtract the oldest pixel from the sum
         aSum -= aHistory[historyIdx];

         // get the latest pixel
         a = dataBuffer[bufferOffset + right] >>> 24;
         aHistory[historyIdx] = a;
         aSum += a;

         if (++historyIdx >= shadowSize) {
           historyIdx -= shadowSize;
         }
       }
     }
     // vertical pass
     for (int x = 0, bufferOffset = 0; x < dstWidth; x++, bufferOffset = x) {
       aSum = 0;
       historyIdx = 0;
       for (int y = 0; y < shadowSize; y++, bufferOffset += dstWidth) {
         int a = dataBuffer[bufferOffset] >>> 24;
         aHistory[y] = a;
         aSum += a;
       }

       bufferOffset -= lastPixelOffset;

       for (int y = yStart; y < yStop; y++, bufferOffset += dstWidth) {
         int a = (int) (aSum * sumDivider);
         dataBuffer[bufferOffset] = a << 24 | shadowRgb;

         // subtract the oldest pixel from the sum
         aSum -= aHistory[historyIdx];

         // get the latest pixel
         a = dataBuffer[bufferOffset + lastPixelOffset] >>> 24;
         aHistory[historyIdx] = a;
         aSum += a;

         if (++historyIdx >= shadowSize) {
           historyIdx -= shadowSize;
         }
       }
     }

     //noinspection ConstantConditions
     UIUtil.drawImage(g2, source, null, 0, 0);
     g2.dispose();

     return image;
   }

   /**
    * Draws a rectangular drop shadow (of size {@link #SHADOW_SIZE} by
    * {@link #SHADOW_SIZE} around the given source and returns a new image with
    * both combined
    *
    * @param source the source image
    * @return the source image with a drop shadow on the bottom and right
    */
   public static BufferedImage createRectangularDropShadow(BufferedImage source) {
     int type = source.getType();
     if (type == BufferedImage.TYPE_CUSTOM) {
       type = BufferedImage.TYPE_INT_ARGB;
     }

     int width = source.getWidth();
     int height = source.getHeight();
     BufferedImage image;
     if (ImageUtils.isRetinaImage(source)) {
       image = ImageUtils.createDipImage(width + SHADOW_SIZE, height + SHADOW_SIZE, type);
     } else {
       //noinspection UndesirableClassUsage
       image = new BufferedImage(width + SHADOW_SIZE, height + SHADOW_SIZE, type);
     }
     Graphics g = image.getGraphics();
     //noinspection ConstantConditions
     UIUtil.drawImage(g, source, 0, 0, null);
     drawRectangleShadow(image, 0, 0, width, height);
     g.dispose();

     return image;
   }

   /**
    * Draws a small rectangular drop shadow (of size {@link #SMALL_SHADOW_SIZE} by
    * {@link #SMALL_SHADOW_SIZE} around the given source and returns a new image with
    * both combined
    *
    * @param source the source image
    * @return the source image with a drop shadow on the bottom and right
    */
   public static BufferedImage createSmallRectangularDropShadow(BufferedImage source) {
     int type = source.getType();
     if (type == BufferedImage.TYPE_CUSTOM) {
       type = BufferedImage.TYPE_INT_ARGB;
     }

     int width = source.getWidth();
     int height = source.getHeight();

     BufferedImage image;
     if (ImageUtils.isRetinaImage(source)) {
       image = ImageUtils.createDipImage(width + SMALL_SHADOW_SIZE, height + SMALL_SHADOW_SIZE, type);
     } else {
       //noinspection UndesirableClassUsage
       image = new BufferedImage(width + SMALL_SHADOW_SIZE, height + SMALL_SHADOW_SIZE, type);
     }

     Graphics g = image.getGraphics();
     //noinspection ConstantConditions
     UIUtil.drawImage(g, source, 0, 0, null);
     drawSmallRectangleShadow(image, 0, 0, width, height);
     g.dispose();

     return image;
   }

   /**
    * Draws a drop shadow for the given rectangle into the given context. It
    * will not draw anything if the rectangle is smaller than a minimum
    * determined by the assets used to draw the shadow graphics.
    * The size of the shadow is {@link #SHADOW_SIZE}.
    *
    * @param image the image to draw the shadow into
    * @param x the left coordinate of the left hand side of the rectangle
    * @param y the top coordinate of the top of the rectangle
    * @param width the width of the rectangle
    * @param height the height of the rectangle
    */
   public static void drawRectangleShadow(BufferedImage image,
                                                int x, int y, int width, int height) {
     Graphics gc = image.getGraphics();
     try {
       drawRectangleShadow(gc, x, y, width, height);
     } finally {
       gc.dispose();
     }
   }

   /**
    * Draws a small drop shadow for the given rectangle into the given context. It
    * will not draw anything if the rectangle is smaller than a minimum
    * determined by the assets used to draw the shadow graphics.
    * The size of the shadow is {@link #SMALL_SHADOW_SIZE}.
    *
    * @param image the image to draw the shadow into
    * @param x the left coordinate of the left hand side of the rectangle
    * @param y the top coordinate of the top of the rectangle
    * @param width the width of the rectangle
    * @param height the height of the rectangle
    */
   public static void drawSmallRectangleShadow(BufferedImage image,
                                                     int x, int y, int width, int height) {
     Graphics gc = image.getGraphics();
     try {
       drawSmallRectangleShadow(gc, x, y, width, height);
     } finally {
       gc.dispose();
     }
   }

   /**
    * The width and height of the drop shadow painted by
    * {@link #drawRectangleShadow(Graphics, int, int, int, int)}
    */
   public static final int SHADOW_SIZE = 20; // DO NOT EDIT. This corresponds to bitmap graphics

   /**
    * The width and height of the drop shadow painted by
    * {@link #drawSmallRectangleShadow(Graphics, int, int, int, int)}
    */
   public static final int SMALL_SHADOW_SIZE = 10; // DO NOT EDIT. Corresponds to bitmap graphics

   /**
    * Draws a drop shadow for the given rectangle into the given context. It
    * will not draw anything if the rectangle is smaller than a minimum
    * determined by the assets used to draw the shadow graphics.
    *
    * @param gc the graphics context to draw into
    * @param x the left coordinate of the left hand side of the rectangle
    * @param y the top coordinate of the top of the rectangle
    * @param width the width of the rectangle
    * @param height the height of the rectangle
    */
   @SuppressWarnings("ConstantConditions")
   public static void drawRectangleShadow(Graphics gc, int x, int y, int width, int height) {
     assert ShadowBottomLeft != null;
     assert ShadowBottomRight.getWidth(null) == SHADOW_SIZE;
     assert ShadowBottomRight.getHeight(null) == SHADOW_SIZE;

     int blWidth = ShadowBottomLeft.getWidth(null);
     int trHeight = ShadowTopRight.getHeight(null);
     if (width < blWidth) {
       return;
     }
     if (height < trHeight) {
       return;
     }

     UIUtil.drawImage(gc, ShadowBottomLeft, x, y + height, null);
     UIUtil.drawImage(gc, ShadowBottomRight, x + width, y + height, null);
     UIUtil.drawImage(gc, ShadowTopRight, x + width, y, null);
     ImageUtils.drawDipImage(gc, ShadowBottom, x + ShadowBottomLeft.getWidth(null), y + height, x + width,
                             y + height + ShadowBottom.getHeight(null), 0, 0, ShadowBottom.getWidth(null), ShadowBottom.getHeight(null),
                             null);
     ImageUtils.drawDipImage(gc, ShadowRight, x + width, y + ShadowTopRight.getHeight(null), x + width + ShadowRight.getWidth(null),
                             y + height, 0, 0, ShadowRight.getWidth(null), ShadowRight.getHeight(null), null);
   }

   /**
    * Draws a small drop shadow for the given rectangle into the given context. It
    * will not draw anything if the rectangle is smaller than a minimum
    * determined by the assets used to draw the shadow graphics.
    * <p>
    *
    * @param gc the graphics context to draw into
    * @param x the left coordinate of the left hand side of the rectangle
    * @param y the top coordinate of the top of the rectangle
    * @param width the width of the rectangle
    * @param height the height of the rectangle
    */
   @SuppressWarnings("ConstantConditions")
   public static void drawSmallRectangleShadow(Graphics gc, int x, int y, int width, int height) {
     assert Shadow2BottomLeft != null;
     assert Shadow2TopRight != null;
     assert Shadow2BottomRight.getWidth(null) == SMALL_SHADOW_SIZE;
     assert Shadow2BottomRight.getHeight(null) == SMALL_SHADOW_SIZE;

     int blWidth = Shadow2BottomLeft.getWidth(null);
     int trHeight = Shadow2TopRight.getHeight(null);
     if (width < blWidth) {
       return;
     }
     if (height < trHeight) {
       return;
     }

     UIUtil.drawImage(gc, Shadow2BottomLeft, x, y + height, null);
     UIUtil.drawImage(gc, Shadow2BottomRight, x + width, y + height, null);
     UIUtil.drawImage(gc, Shadow2TopRight, x + width, y, null);
     ImageUtils.drawDipImage(gc, Shadow2Bottom, x + Shadow2BottomLeft.getWidth(null), y + height, x + width,
                             y + height + Shadow2Bottom.getHeight(null), 0, 0, Shadow2Bottom.getWidth(null), Shadow2Bottom.getHeight(null),
                             null);
     ImageUtils.drawDipImage(gc, Shadow2Right, x + width, y + Shadow2TopRight.getHeight(null), x + width + Shadow2Right.getWidth(null),
                             y + height, 0, 0, Shadow2Right.getWidth(null), Shadow2Right.getHeight(null), null);
   }

   // Shadow graphics. This was generated by creating a drop shadow in
   // Gimp, using the parameters x offset=10, y offset=10, blur radius=10,
   // (for the small drop shadows x offset=10, y offset=10, blur radius=10)
   // color=black, and opacity=51. These values attempt to make a shadow
   // that is legible both for dark and light themes, on top of the
   // canvas background (rgb(150,150,150). Darker shadows would tend to
   // blend into the foreground for a dark holo screen, and lighter shadows
   // would be hard to spot on the canvas background. If you make adjustments,
   // make sure to check the shadow with both dark and light themes.
   //
   // After making the graphics, I cut out the top right, bottom left
   // and bottom right corners as 20x20 images, and these are reproduced by
   // painting them in the corresponding places in the target graphics context.
   // I then grabbed a single horizontal gradient line from the middle of the
   // right edge,and a single vertical gradient line from the bottom. These
   // are then painted scaled/stretched in the target to fill the gaps between
   // the three corner images.
   //
   // Filenames: bl=bottom left, b=bottom, br=bottom right, r=right, tr=top right

   // Normal Drop Shadow
   private static final Image ShadowBottom = ImageUtils.loadIcon("/icons/shadow-b.png");
   private static final Image ShadowBottomLeft = ImageUtils.loadIcon("/icons/shadow-bl.png");
   private static final Image ShadowBottomRight = ImageUtils.loadIcon("/icons/shadow-br.png");
   private static final Image ShadowRight = ImageUtils.loadIcon("/icons/shadow-r.png");
   private static final Image ShadowTopRight = ImageUtils.loadIcon("/icons/shadow-tr.png");

   // Small Drop Shadow
   private static final Image Shadow2Bottom = ImageUtils.loadIcon("/icons/shadow2-b.png");
   private static final Image Shadow2BottomLeft = ImageUtils.loadIcon("/icons/shadow2-bl.png");
   private static final Image Shadow2BottomRight = ImageUtils.loadIcon("/icons/shadow2-br.png");
   private static final Image Shadow2Right = ImageUtils.loadIcon("/icons/shadow2-r.png");
   private static final Image Shadow2TopRight = ImageUtils.loadIcon("/icons/shadow2-tr.png");
 }
	/*
	* Copyright (C) 2013 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/
	package com.android.tools.idea.rendering;

	import com.intellij.util.ui.UIUtil;
	import org.jetbrains.annotations.NotNull;

	import java.awt.*;
	import java.awt.image.BufferedImage;
	import java.awt.image.DataBufferInt;

	public class ShadowPainter {

	/**
	* Adds a drop shadow to a semi-transparent image (of an arbitrary shape) and returns it as a new image.
	* This method attempts to mimic the same visual characteristics as the rectangular shadow painting
	* methods in this class, {@link #createRectangularDropShadow(java.awt.image.BufferedImage)} and
	* {@link #createSmallRectangularDropShadow(java.awt.image.BufferedImage)}.
	*
	* @param source the source image
	* @param shadowSize the size of the shadow, normally {@link #SHADOW_SIZE or {@link #SMALL_SHADOW_SIZE}}
	* @return a new image with the shadow painted in
	*/
	@NotNull
	public static BufferedImage createDropShadow(BufferedImage source, int shadowSize) {
	shadowSize /= 2; // make shadow size have the same meaning as in the other shadow paint methods in this class

	return createDropShadow(source, shadowSize, 0.7f, 0);
	}

	/**
	* Creates a drop shadow of a given image and returns a new image which shows the
	* input image on top of its drop shadow.
	* <p>
	* <b>NOTE: If the shape is rectangular and opaque, consider using
	* {@link #drawRectangleShadow(java.awt.Graphics, int, int, int, int)} instead.</b>
	*
	* @param source the source image to be shadowed
	* @param shadowSize the size of the shadow in pixels
	* @param shadowOpacity the opacity of the shadow, with 0=transparent and 1=opaque
	* @param shadowRgb the RGB int to use for the shadow color
	* @return a new image with the source image on top of its shadow
	*/
	@SuppressWarnings({"AssignmentToForLoopParameter", "UnnecessaryLocalVariable", // Imported code
	"SuspiciousNameCombination", "UnusedAssignment"})
	public static BufferedImage createDropShadow(BufferedImage source, int shadowSize,
	float shadowOpacity, int shadowRgb) {

	// This code is based on
	// http://www.jroller.com/gfx/entry/non_rectangular_shadow

	BufferedImage image;
	int width = source.getWidth();
	int height = source.getHeight();
	boolean isRetina = ImageUtils.isRetinaImage(source);
	if (isRetina && UIUtil.isAppleRetina()) {
	// This shadow painting code doesn't work right with the Apple JDK 6 Retina support.
	// Since this code isn't used very frequently, just skip the drop shadows for now
	return source;
	}
	if (isRetina) {
	image = ImageUtils.createDipImage(width + SHADOW_SIZE, height + SHADOW_SIZE, BufferedImage.TYPE_INT_ARGB);
	} else {
	//noinspection UndesirableClassUsage
	image = new BufferedImage(width + SHADOW_SIZE, height + SHADOW_SIZE, BufferedImage.TYPE_INT_ARGB);
	}

	Graphics2D g2 = image.createGraphics();
	//noinspection ConstantConditions
	UIUtil.drawImage(g2, source, shadowSize, shadowSize, null);

	int dstWidth = image.getWidth();
	int dstHeight = image.getHeight();

	int left = (shadowSize - 1) >> 1;
	int right = shadowSize - left;
	int xStart = left;
	int xStop = dstWidth - right;
	int yStart = left;
	int yStop = dstHeight - right;

	shadowRgb &= 0x00FFFFFF;

	int[] aHistory = new int[shadowSize];
	int historyIdx = 0;

	int aSum;

	int[] dataBuffer = ((DataBufferInt) image.getRaster().getDataBuffer()).getData();
	int lastPixelOffset = right * dstWidth;
	float sumDivider = shadowOpacity / shadowSize;

	// horizontal pass
	for (int y = 0, bufferOffset = 0; y < dstHeight; y++, bufferOffset = y * dstWidth) {
	aSum = 0;
	historyIdx = 0;
	for (int x = 0; x < shadowSize; x++, bufferOffset++) {
	int a = dataBuffer[bufferOffset] >>> 24;
	aHistory[x] = a;
	aSum += a;
	}

	bufferOffset -= right;

	for (int x = xStart; x < xStop; x++, bufferOffset++) {
	int a = (int) (aSum * sumDivider);
	dataBuffer[bufferOffset] = a << 24 \| shadowRgb;

	// subtract the oldest pixel from the sum
	aSum -= aHistory[historyIdx];

	// get the latest pixel
	a = dataBuffer[bufferOffset + right] >>> 24;
	aHistory[historyIdx] = a;
	aSum += a;

	if (++historyIdx >= shadowSize) {
	historyIdx -= shadowSize;
	}
	}
	}
	// vertical pass
	for (int x = 0, bufferOffset = 0; x < dstWidth; x++, bufferOffset = x) {
	aSum = 0;
	historyIdx = 0;
	for (int y = 0; y < shadowSize; y++, bufferOffset += dstWidth) {
	int a = dataBuffer[bufferOffset] >>> 24;
	aHistory[y] = a;
	aSum += a;
	}

	bufferOffset -= lastPixelOffset;

	for (int y = yStart; y < yStop; y++, bufferOffset += dstWidth) {
	int a = (int) (aSum * sumDivider);
	dataBuffer[bufferOffset] = a << 24 \| shadowRgb;

	// subtract the oldest pixel from the sum
	aSum -= aHistory[historyIdx];

	// get the latest pixel
	a = dataBuffer[bufferOffset + lastPixelOffset] >>> 24;
	aHistory[historyIdx] = a;
	aSum += a;

	if (++historyIdx >= shadowSize) {
	historyIdx -= shadowSize;
	}
	}
	}

	//noinspection ConstantConditions
	UIUtil.drawImage(g2, source, null, 0, 0);
	g2.dispose();

	return image;
	}

	/**
	* Draws a rectangular drop shadow (of size {@link #SHADOW_SIZE} by
	* {@link #SHADOW_SIZE} around the given source and returns a new image with
	* both combined
	*
	* @param source the source image
	* @return the source image with a drop shadow on the bottom and right
	*/
	public static BufferedImage createRectangularDropShadow(BufferedImage source) {
	int type = source.getType();
	if (type == BufferedImage.TYPE_CUSTOM) {
	type = BufferedImage.TYPE_INT_ARGB;
	}

	int width = source.getWidth();
	int height = source.getHeight();
	BufferedImage image;
	if (ImageUtils.isRetinaImage(source)) {
	image = ImageUtils.createDipImage(width + SHADOW_SIZE, height + SHADOW_SIZE, type);
	} else {
	//noinspection UndesirableClassUsage
	image = new BufferedImage(width + SHADOW_SIZE, height + SHADOW_SIZE, type);
	}
	Graphics g = image.getGraphics();
	//noinspection ConstantConditions
	UIUtil.drawImage(g, source, 0, 0, null);
	drawRectangleShadow(image, 0, 0, width, height);
	g.dispose();

	return image;
	}

	/**
	* Draws a small rectangular drop shadow (of size {@link #SMALL_SHADOW_SIZE} by
	* {@link #SMALL_SHADOW_SIZE} around the given source and returns a new image with
	* both combined
	*
	* @param source the source image
	* @return the source image with a drop shadow on the bottom and right
	*/
	public static BufferedImage createSmallRectangularDropShadow(BufferedImage source) {
	int type = source.getType();
	if (type == BufferedImage.TYPE_CUSTOM) {
	type = BufferedImage.TYPE_INT_ARGB;
	}

	int width = source.getWidth();
	int height = source.getHeight();

	BufferedImage image;
	if (ImageUtils.isRetinaImage(source)) {
	image = ImageUtils.createDipImage(width + SMALL_SHADOW_SIZE, height + SMALL_SHADOW_SIZE, type);
	} else {
	//noinspection UndesirableClassUsage
	image = new BufferedImage(width + SMALL_SHADOW_SIZE, height + SMALL_SHADOW_SIZE, type);
	}

	Graphics g = image.getGraphics();
	//noinspection ConstantConditions
	UIUtil.drawImage(g, source, 0, 0, null);
	drawSmallRectangleShadow(image, 0, 0, width, height);
	g.dispose();

	return image;
	}

	/**
	* Draws a drop shadow for the given rectangle into the given context. It
	* will not draw anything if the rectangle is smaller than a minimum
	* determined by the assets used to draw the shadow graphics.
	* The size of the shadow is {@link #SHADOW_SIZE}.
	*
	* @param image the image to draw the shadow into
	* @param x the left coordinate of the left hand side of the rectangle
	* @param y the top coordinate of the top of the rectangle
	* @param width the width of the rectangle
	* @param height the height of the rectangle
	*/
	public static void drawRectangleShadow(BufferedImage image,
	int x, int y, int width, int height) {
	Graphics gc = image.getGraphics();
	try {
	drawRectangleShadow(gc, x, y, width, height);
	} finally {
	gc.dispose();
	}
	}

	/**
	* Draws a small drop shadow for the given rectangle into the given context. It
	* will not draw anything if the rectangle is smaller than a minimum
	* determined by the assets used to draw the shadow graphics.
	* The size of the shadow is {@link #SMALL_SHADOW_SIZE}.
	*
	* @param image the image to draw the shadow into
	* @param x the left coordinate of the left hand side of the rectangle
	* @param y the top coordinate of the top of the rectangle
	* @param width the width of the rectangle
	* @param height the height of the rectangle
	*/
	public static void drawSmallRectangleShadow(BufferedImage image,
	int x, int y, int width, int height) {
	Graphics gc = image.getGraphics();
	try {
	drawSmallRectangleShadow(gc, x, y, width, height);
	} finally {
	gc.dispose();
	}
	}

	/**
	* The width and height of the drop shadow painted by
	* {@link #drawRectangleShadow(Graphics, int, int, int, int)}
	*/
	public static final int SHADOW_SIZE = 20; // DO NOT EDIT. This corresponds to bitmap graphics

	/**
	* The width and height of the drop shadow painted by
	* {@link #drawSmallRectangleShadow(Graphics, int, int, int, int)}
	*/
	public static final int SMALL_SHADOW_SIZE = 10; // DO NOT EDIT. Corresponds to bitmap graphics

	/**
	* Draws a drop shadow for the given rectangle into the given context. It
	* will not draw anything if the rectangle is smaller than a minimum
	* determined by the assets used to draw the shadow graphics.
	*
	* @param gc the graphics context to draw into
	* @param x the left coordinate of the left hand side of the rectangle
	* @param y the top coordinate of the top of the rectangle
	* @param width the width of the rectangle
	* @param height the height of the rectangle
	*/
	@SuppressWarnings("ConstantConditions")
	public static void drawRectangleShadow(Graphics gc, int x, int y, int width, int height) {
	assert ShadowBottomLeft != null;
	assert ShadowBottomRight.getWidth(null) == SHADOW_SIZE;
	assert ShadowBottomRight.getHeight(null) == SHADOW_SIZE;

	int blWidth = ShadowBottomLeft.getWidth(null);
	int trHeight = ShadowTopRight.getHeight(null);
	if (width < blWidth) {
	return;
	}
	if (height < trHeight) {
	return;
	}

	UIUtil.drawImage(gc, ShadowBottomLeft, x, y + height, null);
	UIUtil.drawImage(gc, ShadowBottomRight, x + width, y + height, null);
	UIUtil.drawImage(gc, ShadowTopRight, x + width, y, null);
	ImageUtils.drawDipImage(gc, ShadowBottom, x + ShadowBottomLeft.getWidth(null), y + height, x + width,
	y + height + ShadowBottom.getHeight(null), 0, 0, ShadowBottom.getWidth(null), ShadowBottom.getHeight(null),
	null);
	ImageUtils.drawDipImage(gc, ShadowRight, x + width, y + ShadowTopRight.getHeight(null), x + width + ShadowRight.getWidth(null),
	y + height, 0, 0, ShadowRight.getWidth(null), ShadowRight.getHeight(null), null);
	}

	/**
	* Draws a small drop shadow for the given rectangle into the given context. It
	* will not draw anything if the rectangle is smaller than a minimum
	* determined by the assets used to draw the shadow graphics.
	* <p>
	*
	* @param gc the graphics context to draw into
	* @param x the left coordinate of the left hand side of the rectangle
	* @param y the top coordinate of the top of the rectangle
	* @param width the width of the rectangle
	* @param height the height of the rectangle
	*/
	@SuppressWarnings("ConstantConditions")
	public static void drawSmallRectangleShadow(Graphics gc, int x, int y, int width, int height) {
	assert Shadow2BottomLeft != null;
	assert Shadow2TopRight != null;
	assert Shadow2BottomRight.getWidth(null) == SMALL_SHADOW_SIZE;
	assert Shadow2BottomRight.getHeight(null) == SMALL_SHADOW_SIZE;

	int blWidth = Shadow2BottomLeft.getWidth(null);
	int trHeight = Shadow2TopRight.getHeight(null);
	if (width < blWidth) {
	return;
	}
	if (height < trHeight) {
	return;
	}

	UIUtil.drawImage(gc, Shadow2BottomLeft, x, y + height, null);
	UIUtil.drawImage(gc, Shadow2BottomRight, x + width, y + height, null);
	UIUtil.drawImage(gc, Shadow2TopRight, x + width, y, null);
	ImageUtils.drawDipImage(gc, Shadow2Bottom, x + Shadow2BottomLeft.getWidth(null), y + height, x + width,
	y + height + Shadow2Bottom.getHeight(null), 0, 0, Shadow2Bottom.getWidth(null), Shadow2Bottom.getHeight(null),
	null);
	ImageUtils.drawDipImage(gc, Shadow2Right, x + width, y + Shadow2TopRight.getHeight(null), x + width + Shadow2Right.getWidth(null),
	y + height, 0, 0, Shadow2Right.getWidth(null), Shadow2Right.getHeight(null), null);
	}

	// Shadow graphics. This was generated by creating a drop shadow in
	// Gimp, using the parameters x offset=10, y offset=10, blur radius=10,
	// (for the small drop shadows x offset=10, y offset=10, blur radius=10)
	// color=black, and opacity=51. These values attempt to make a shadow
	// that is legible both for dark and light themes, on top of the
	// canvas background (rgb(150,150,150). Darker shadows would tend to
	// blend into the foreground for a dark holo screen, and lighter shadows
	// would be hard to spot on the canvas background. If you make adjustments,
	// make sure to check the shadow with both dark and light themes.
	//
	// After making the graphics, I cut out the top right, bottom left
	// and bottom right corners as 20x20 images, and these are reproduced by
	// painting them in the corresponding places in the target graphics context.
	// I then grabbed a single horizontal gradient line from the middle of the
	// right edge,and a single vertical gradient line from the bottom. These
	// are then painted scaled/stretched in the target to fill the gaps between
	// the three corner images.
	//
	// Filenames: bl=bottom left, b=bottom, br=bottom right, r=right, tr=top right

	// Normal Drop Shadow
	private static final Image ShadowBottom = ImageUtils.loadIcon("/icons/shadow-b.png");
	private static final Image ShadowBottomLeft = ImageUtils.loadIcon("/icons/shadow-bl.png");
	private static final Image ShadowBottomRight = ImageUtils.loadIcon("/icons/shadow-br.png");
	private static final Image ShadowRight = ImageUtils.loadIcon("/icons/shadow-r.png");
	private static final Image ShadowTopRight = ImageUtils.loadIcon("/icons/shadow-tr.png");

	// Small Drop Shadow
	private static final Image Shadow2Bottom = ImageUtils.loadIcon("/icons/shadow2-b.png");
	private static final Image Shadow2BottomLeft = ImageUtils.loadIcon("/icons/shadow2-bl.png");
	private static final Image Shadow2BottomRight = ImageUtils.loadIcon("/icons/shadow2-br.png");
	private static final Image Shadow2Right = ImageUtils.loadIcon("/icons/shadow2-r.png");
	private static final Image Shadow2TopRight = ImageUtils.loadIcon("/icons/shadow2-tr.png");
	}