/*
* Copyright (C) 2006 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.glview.graphics.drawable;
import java.io.IOException;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import android.content.res.ColorStateList;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.PixelFormat;
import android.os.Build;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import com.glview.R;
import com.glview.graphics.Bitmap;
import com.glview.graphics.BitmapFactory;
import com.glview.graphics.Rect;
import com.glview.graphics.bitmap.ResourceBitmap;
import com.glview.graphics.shader.BitmapShader;
import com.glview.graphics.shader.TileMode;
import com.glview.hwui.GLCanvas;
import com.glview.hwui.GLPaint;
import com.glview.util.ArrayUtils;
import com.glview.view.Gravity;
/**
* A Drawable that wraps a bitmap and can be tiled, stretched, or aligned. You can create a
* BitmapDrawable from a file path, an input stream, through XML inflation, or from
* a {@link android.graphics.Bitmap} object.
* <p>It can be defined in an XML file with the <code><bitmap></code> element. For more
* information, see the guide to <a
* href="{@docRoot}guide/topics/resources/drawable-resource.html">Drawable Resources</a>.</p>
* <p>
* Also see the {@link android.graphics.Bitmap} class, which handles the management and
* transformation of raw bitmap graphics, and should be used when drawing to a
* {@link android.graphics.Canvas}.
* </p>
*
* @attr ref android.R.styleable#BitmapDrawable_src
* @attr ref android.R.styleable#BitmapDrawable_antialias
* @attr ref android.R.styleable#BitmapDrawable_filter
* @attr ref android.R.styleable#BitmapDrawable_dither
* @attr ref android.R.styleable#BitmapDrawable_gravity
* @attr ref android.R.styleable#BitmapDrawable_mipMap
* @attr ref android.R.styleable#BitmapDrawable_tileMode
*/
public class BitmapDrawable extends Drawable {
// Constants for {@link android.R.styleable#BitmapDrawable_tileMode}.
private static final int TILE_MODE_UNDEFINED = -2;
private static final int TILE_MODE_DISABLED = -1;
private static final int TILE_MODE_CLAMP = 0;
private static final int TILE_MODE_REPEAT = 1;
private static final int TILE_MODE_MIRROR = 2;
private final Rect mDstRect = new Rect(); // #updateDstRectAndInsetsIfDirty() sets this
private BitmapState mBitmapState;
private int mTargetDensity = DisplayMetrics.DENSITY_DEFAULT;
private boolean mDstRectAndInsetsDirty = true;
private boolean mMutated;
// These are scaled to match the target density.
private int mBitmapWidth;
private int mBitmapHeight;
/** Optical insets due to gravity. */
private Insets mOpticalInsets = Insets.NONE;
/**
* Create an empty drawable, not dealing with density.
* @deprecated Use {@link #BitmapDrawable(android.content.res.Resources, android.graphics.Bitmap)}
* instead to specify a bitmap to draw with and ensure the correct density is set.
*/
@Deprecated
public BitmapDrawable() {
mBitmapState = new BitmapState((Bitmap) null);
}
/**
* Create an empty drawable, setting initial target density based on
* the display metrics of the resources.
*
* @deprecated Use {@link #BitmapDrawable(android.content.res.Resources, android.graphics.Bitmap)}
* instead to specify a bitmap to draw with.
*/
@SuppressWarnings("unused")
@Deprecated
public BitmapDrawable(Resources res) {
mBitmapState = new BitmapState((Bitmap) null);
mBitmapState.mTargetDensity = mTargetDensity;
}
/**
* Create drawable from a bitmap, not dealing with density.
* @deprecated Use {@link #BitmapDrawable(Resources, Bitmap)} to ensure
* that the drawable has correctly set its target density.
*/
@Deprecated
public BitmapDrawable(Bitmap bitmap) {
this(new BitmapState(bitmap), null);
}
/**
* Create drawable from a bitmap, setting initial target density based on
* the display metrics of the resources.
*/
public BitmapDrawable(Resources res, Bitmap bitmap) {
this(new BitmapState(bitmap), res);
mBitmapState.mTargetDensity = mTargetDensity;
}
/**
* Create a drawable by opening a given file path and decoding the bitmap.
* @deprecated Use {@link #BitmapDrawable(Resources, String)} to ensure
* that the drawable has correctly set its target density.
*/
@Deprecated
public BitmapDrawable(String filepath) {
this(new BitmapState(BitmapFactory.decodeFile(filepath)), null);
if (mBitmapState.mBitmap == null) {
android.util.Log.w("BitmapDrawable", "BitmapDrawable cannot decode " + filepath);
}
}
/**
* Create a drawable by opening a given file path and decoding the bitmap.
*/
@SuppressWarnings("unused")
public BitmapDrawable(Resources res, String filepath) {
this(new BitmapState(BitmapFactory.decodeFile(filepath)), null);
mBitmapState.mTargetDensity = mTargetDensity;
if (mBitmapState.mBitmap == null) {
android.util.Log.w("BitmapDrawable", "BitmapDrawable cannot decode " + filepath);
}
}
/**
* Create a drawable by decoding a bitmap from the given input stream.
* @deprecated Use {@link #BitmapDrawable(Resources, java.io.InputStream)} to ensure
* that the drawable has correctly set its target density.
*/
@Deprecated
public BitmapDrawable(java.io.InputStream is) {
this(new BitmapState(BitmapFactory.decodeStream(is)), null);
if (mBitmapState.mBitmap == null) {
android.util.Log.w("BitmapDrawable", "BitmapDrawable cannot decode " + is);
}
}
/**
* Create a drawable by decoding a bitmap from the given input stream.
*/
@SuppressWarnings("unused")
public BitmapDrawable(Resources res, java.io.InputStream is) {
this(new BitmapState(BitmapFactory.decodeStream(is)), null);
mBitmapState.mTargetDensity = mTargetDensity;
if (mBitmapState.mBitmap == null) {
android.util.Log.w("BitmapDrawable", "BitmapDrawable cannot decode " + is);
}
}
/**
* Returns the paint used to render this drawable.
*/
public final GLPaint getPaint() {
return mBitmapState.mPaint;
}
/**
* Returns the bitmap used by this drawable to render. May be null.
*/
public final Bitmap getBitmap() {
return mBitmapState.mBitmap;
}
private void computeBitmapSize() {
final Bitmap bitmap = mBitmapState.mBitmap;
if (bitmap != null) {
mBitmapWidth = bitmap.getScaledWidth(mTargetDensity);
mBitmapHeight = bitmap.getScaledHeight(mTargetDensity);
} else {
mBitmapWidth = mBitmapHeight = -1;
}
}
private void setBitmap(Bitmap bitmap) {
if (mBitmapState.mBitmap != bitmap) {
mBitmapState.mBitmap = bitmap;
computeBitmapSize();
invalidateSelf();
}
}
/**
* Set the density scale at which this drawable will be rendered. This
* method assumes the drawable will be rendered at the same density as the
* specified canvas.
*
* @param canvas The Canvas from which the density scale must be obtained.
*
* @see android.graphics.Bitmap#setDensity(int)
* @see android.graphics.Bitmap#getDensity()
*/
/*public void setTargetDensity(Canvas canvas) {
setTargetDensity(canvas.getDensity());
}*/
/**
* Set the density scale at which this drawable will be rendered.
*
* @param metrics The DisplayMetrics indicating the density scale for this drawable.
*
* @see android.graphics.Bitmap#setDensity(int)
* @see android.graphics.Bitmap#getDensity()
*/
public void setTargetDensity(DisplayMetrics metrics) {
setTargetDensity(metrics.densityDpi);
}
/**
* Set the density at which this drawable will be rendered.
*
* @param density The density scale for this drawable.
*
* @see android.graphics.Bitmap#setDensity(int)
* @see android.graphics.Bitmap#getDensity()
*/
public void setTargetDensity(int density) {
if (mTargetDensity != density) {
mTargetDensity = density == 0 ? DisplayMetrics.DENSITY_DEFAULT : density;
if (mBitmapState.mBitmap != null) {
computeBitmapSize();
}
invalidateSelf();
}
}
/** Get the gravity used to position/stretch the bitmap within its bounds.
* See android.view.Gravity
* @return the gravity applied to the bitmap
*/
public int getGravity() {
return mBitmapState.mGravity;
}
/** Set the gravity used to position/stretch the bitmap within its bounds.
See android.view.Gravity
* @param gravity the gravity
*/
public void setGravity(int gravity) {
if (mBitmapState.mGravity != gravity) {
mBitmapState.mGravity = gravity;
mDstRectAndInsetsDirty = true;
invalidateSelf();
}
}
/**
* Enables or disables the mipmap hint for this drawable's bitmap.
* See {@link Bitmap#setHasMipMap(boolean)} for more information.
*
* If the bitmap is null calling this method has no effect.
*
* @param mipMap True if the bitmap should use mipmaps, false otherwise.
*
* @see #hasMipMap()
*/
public void setMipMap(boolean mipMap) {
if (mBitmapState.mBitmap != null) {
mBitmapState.mBitmap.setHasMipMap(mipMap);
invalidateSelf();
}
}
/**
* Indicates whether the mipmap hint is enabled on this drawable's bitmap.
*
* @return True if the mipmap hint is set, false otherwise. If the bitmap
* is null, this method always returns false.
*
* @see #setMipMap(boolean)
* @attr ref android.R.styleable#BitmapDrawable_mipMap
*/
public boolean hasMipMap() {
return mBitmapState.mBitmap != null && mBitmapState.mBitmap.hasMipMap();
}
/**
* Enables or disables anti-aliasing for this drawable. Anti-aliasing affects
* the edges of the bitmap only so it applies only when the drawable is rotated.
*
* @param aa True if the bitmap should be anti-aliased, false otherwise.
*
* @see #hasAntiAlias()
*/
public void setAntiAlias(boolean aa) {
// mBitmapState.mPaint.setAntiAlias(aa);
invalidateSelf();
}
/**
* Indicates whether anti-aliasing is enabled for this drawable.
*
* @return True if anti-aliasing is enabled, false otherwise.
*
* @see #setAntiAlias(boolean)
*/
public boolean hasAntiAlias() {
return false;//mBitmapState.mPaint.isAntiAlias();
}
@Override
public void setFilterBitmap(boolean filter) {
// mBitmapState.mPaint.setFilterBitmap(filter);
invalidateSelf();
}
@Override
public void setDither(boolean dither) {
// mBitmapState.mPaint.setDither(dither);
invalidateSelf();
}
/**
* Indicates the repeat behavior of this drawable on the X axis.
*
* @return {@link android.graphics.Shader.TileMode#CLAMP} if the bitmap does not repeat,
* {@link android.graphics.Shader.TileMode#REPEAT} or
* {@link android.graphics.Shader.TileMode#MIRROR} otherwise.
*/
public TileMode getTileModeX() {
return mBitmapState.mTileModeX;
}
/**
* Indicates the repeat behavior of this drawable on the Y axis.
*
* @return {@link android.graphics.Shader.TileMode#CLAMP} if the bitmap does not repeat,
* {@link android.graphics.Shader.TileMode#REPEAT} or
* {@link android.graphics.Shader.TileMode#MIRROR} otherwise.
*/
public TileMode getTileModeY() {
return mBitmapState.mTileModeY;
}
/**
* Sets the repeat behavior of this drawable on the X axis. By default, the drawable
* does not repeat its bitmap. Using {@link android.graphics.Shader.TileMode#REPEAT} or
* {@link android.graphics.Shader.TileMode#MIRROR} the bitmap can be repeated (or tiled)
* if the bitmap is smaller than this drawable.
*
* @param mode The repeat mode for this drawable.
*
* @see #setTileModeY(android.graphics.Shader.TileMode)
* @see #setTileModeXY(android.graphics.Shader.TileMode, android.graphics.Shader.TileMode)
* @attr ref android.R.styleable#BitmapDrawable_tileModeX
*/
public void setTileModeX(TileMode mode) {
setTileModeXY(mode, mBitmapState.mTileModeY);
}
/**
* Sets the repeat behavior of this drawable on the Y axis. By default, the drawable
* does not repeat its bitmap. Using {@link android.graphics.Shader.TileMode#REPEAT} or
* {@link android.graphics.Shader.TileMode#MIRROR} the bitmap can be repeated (or tiled)
* if the bitmap is smaller than this drawable.
*
* @param mode The repeat mode for this drawable.
*
* @see #setTileModeX(android.graphics.Shader.TileMode)
* @see #setTileModeXY(android.graphics.Shader.TileMode, android.graphics.Shader.TileMode)
* @attr ref android.R.styleable#BitmapDrawable_tileModeY
*/
public final void setTileModeY(TileMode mode) {
setTileModeXY(mBitmapState.mTileModeX, mode);
}
/**
* Sets the repeat behavior of this drawable on both axis. By default, the drawable
* does not repeat its bitmap. Using {@link android.graphics.Shader.TileMode#REPEAT} or
* {@link android.graphics.Shader.TileMode#MIRROR} the bitmap can be repeated (or tiled)
* if the bitmap is smaller than this drawable.
*
* @param xmode The X repeat mode for this drawable.
* @param ymode The Y repeat mode for this drawable.
*
* @see #setTileModeX(android.graphics.Shader.TileMode)
* @see #setTileModeY(android.graphics.Shader.TileMode)
*/
public void setTileModeXY(TileMode xmode, TileMode ymode) {
final BitmapState state = mBitmapState;
if (state.mTileModeX != xmode || state.mTileModeY != ymode) {
state.mTileModeX = xmode;
state.mTileModeY = ymode;
state.mRebuildShader = true;
mDstRectAndInsetsDirty = true;
invalidateSelf();
}
}
@Override
public void setAutoMirrored(boolean mirrored) {
if (mBitmapState.mAutoMirrored != mirrored) {
mBitmapState.mAutoMirrored = mirrored;
invalidateSelf();
}
}
@Override
public final boolean isAutoMirrored() {
return mBitmapState.mAutoMirrored;
}
@Override
public int getChangingConfigurations() {
return super.getChangingConfigurations() | mBitmapState.mChangingConfigurations;
}
@Override
protected void onBoundsChange(Rect bounds) {
mDstRectAndInsetsDirty = true;
/*final Shader shader = mBitmapState.mPaint.getShader();
if (shader != null) {
if (needMirroring()) {
updateMirrorMatrix(bounds.right - bounds.left);
shader.setLocalMatrix(mMirrorMatrix);
mBitmapState.mPaint.setShader(shader);
} else {
if (mMirrorMatrix != null) {
mMirrorMatrix = null;
// shader.setLocalMatrix(Matrix.IDENTITY_MATRIX);
mBitmapState.mPaint.setShader(shader);
}
}
}*/
}
@Override
public void draw(GLCanvas canvas) {
final Bitmap bitmap = mBitmapState.mBitmap;
if (bitmap == null) {
return;
}
final BitmapState state = mBitmapState;
final GLPaint paint = state.mPaint;
if (state.mRebuildShader) {
final TileMode tmx = state.mTileModeX;
final TileMode tmy = state.mTileModeY;
if (tmx == null && tmy == null) {
paint.setShader(null);
} else {
paint.setShader(new BitmapShader(bitmap,
tmx == null ? TileMode.CLAMP : tmx,
tmy == null ? TileMode.CLAMP : tmy));
}
state.mRebuildShader = false;
}
final int restoreAlpha;
if (state.mBaseAlpha != 1.0f) {
final GLPaint p = getPaint();
restoreAlpha = p.getAlpha();
p.setAlpha((int) (restoreAlpha * state.mBaseAlpha + 0.5f));
} else {
restoreAlpha = -1;
}
updateDstRectAndInsetsIfDirty();
canvas.drawBitmap(bitmap, (Rect) null, mDstRect, paint);
if (restoreAlpha >= 0) {
paint.setAlpha(restoreAlpha);
}
}
private void updateDstRectAndInsetsIfDirty() {
if (mDstRectAndInsetsDirty) {
if (mBitmapState.mTileModeX == null && mBitmapState.mTileModeY == null) {
final Rect bounds = getBounds();
final int layoutDirection = getLayoutDirection();
Gravity.apply(mBitmapState.mGravity, mBitmapWidth, mBitmapHeight,
bounds, mDstRect, layoutDirection);
final int left = mDstRect.left - bounds.left;
final int top = mDstRect.top - bounds.top;
final int right = bounds.right - mDstRect.right;
final int bottom = bounds.bottom - mDstRect.bottom;
mOpticalInsets = Insets.of(left, top, right, bottom);
} else {
copyBounds(mDstRect);
mOpticalInsets = Insets.NONE;
}
}
mDstRectAndInsetsDirty = false;
}
/**
* @hide
*/
@Override
public Insets getOpticalInsets() {
updateDstRectAndInsetsIfDirty();
return mOpticalInsets;
}
/*@Override
public void getOutline(Outline outline) {
updateDstRectAndInsetsIfDirty();
outline.setRect(mDstRect);
// Only opaque Bitmaps can report a non-0 alpha,
// since only they are guaranteed to fill their bounds
boolean opaqueOverShape = mBitmapState.mBitmap != null
&& !mBitmapState.mBitmap.hasAlpha();
outline.setAlpha(opaqueOverShape ? getAlpha() / 255.0f : 0.0f);
}*/
@Override
public void setAlpha(int alpha) {
final int oldAlpha = mBitmapState.mPaint.getAlpha();
if (alpha != oldAlpha) {
mBitmapState.mPaint.setAlpha(alpha);
invalidateSelf();
}
}
@Override
public int getAlpha() {
return mBitmapState.mPaint.getAlpha();
}
/**
* A mutable BitmapDrawable still shares its Bitmap with any other Drawable
* that comes from the same resource.
*
* @return This drawable.
*/
@Override
public Drawable mutate() {
if (!mMutated && super.mutate() == this) {
mBitmapState = new BitmapState(mBitmapState);
mMutated = true;
}
return this;
}
@Override
protected boolean onStateChange(int[] stateSet) {
final BitmapState state = mBitmapState;
if (state.mTint != null) {
return true;
}
return false;
}
@Override
public boolean isStateful() {
final BitmapState s = mBitmapState;
return super.isStateful() || (s.mTint != null && s.mTint.isStateful());
}
@Override
public void inflate(Resources r, XmlPullParser parser, AttributeSet attrs)
throws XmlPullParserException, IOException {
super.inflate(r, parser, attrs);
final TypedArray a = obtainAttributes(r, attrs, com.glview.R.styleable.BitmapDrawable);
updateStateFromTypedArray(a);
verifyState(a);
a.recycle();
}
/**
* Ensures all required attributes are set.
*
* @throws XmlPullParserException if any required attributes are missing
*/
private void verifyState(TypedArray a) throws XmlPullParserException {
final BitmapState state = mBitmapState;
if (state.mBitmap == null) {
throw new XmlPullParserException(a.getPositionDescription() +
": <bitmap> requires a valid src attribute");
}
}
/**
* Updates the constant state from the values in the typed array.
*/
private void updateStateFromTypedArray(TypedArray a) throws XmlPullParserException {
final Resources r = a.getResources();
final BitmapState state = mBitmapState;
// Account for any configuration changes.
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
state.mChangingConfigurations |= a.getChangingConfigurations();
}
// Extract the theme attributes, if any.
// state.mThemeAttrs = a.extractThemeAttrs();
int srcResId = a.getResourceId(R.styleable.BitmapDrawable_src, 0);
if (srcResId != 0) {
final Bitmap bitmap = new ResourceBitmap(r, srcResId);
state.mBitmap = bitmap;
}
state.mTargetDensity = r.getDisplayMetrics().densityDpi;
boolean defMipMap = state.mBitmap != null ? state.mBitmap.hasMipMap() : false;
setMipMap(a.getBoolean(R.styleable.BitmapDrawable_mipMap, defMipMap));
state.mAutoMirrored = a.getBoolean(
R.styleable.BitmapDrawable_autoMirrored, state.mAutoMirrored);
// state.mBaseAlpha = a.getFloat(R.styleable.BitmapDrawable_alpha, state.mBaseAlpha);
//
// final int tintMode = a.getInt(R.styleable.BitmapDrawable_tintMode, -1);
// if (tintMode != -1) {
// state.mTintMode = Drawable.parseTintMode(tintMode, Mode.SRC_IN);
// }
//
// final ColorStateList tint = a.getColorStateList(R.styleable.BitmapDrawable_tint);
// if (tint != null) {
// state.mTint = tint;
// }
//
// final Paint paint = mBitmapState.mPaint;
// paint.setAntiAlias(a.getBoolean(
// R.styleable.BitmapDrawable_antialias, paint.isAntiAlias()));
// paint.setFilterBitmap(a.getBoolean(
// R.styleable.BitmapDrawable_filter, paint.isFilterBitmap()));
// paint.setDither(a.getBoolean(R.styleable.BitmapDrawable_dither, paint.isDither()));
//
setGravity(a.getInt(R.styleable.BitmapDrawable_gravity, state.mGravity));
final int tileMode = a.getInt(R.styleable.BitmapDrawable_tileMode, TILE_MODE_UNDEFINED);
if (tileMode != TILE_MODE_UNDEFINED) {
final TileMode mode = parseTileMode(tileMode);
setTileModeXY(mode, mode);
}
// final int tileModeX = a.getInt(R.styleable.BitmapDrawable_tileModeX, TILE_MODE_UNDEFINED);
// if (tileModeX != TILE_MODE_UNDEFINED) {
// setTileModeX(parseTileMode(tileModeX));
// }
//
// final int tileModeY = a.getInt(R.styleable.BitmapDrawable_tileModeY, TILE_MODE_UNDEFINED);
// if (tileModeY != TILE_MODE_UNDEFINED) {
// setTileModeY(parseTileMode(tileModeY));
// }
// Update local properties.
initializeWithState(state, r);
}
private static TileMode parseTileMode(int tileMode) {
switch (tileMode) {
case TILE_MODE_CLAMP:
return TileMode.CLAMP;
case TILE_MODE_REPEAT:
return TileMode.REPEAT;
case TILE_MODE_MIRROR:
return TileMode.MIRROR;
default:
return null;
}
}
@Override
public int getIntrinsicWidth() {
return mBitmapWidth;
}
@Override
public int getIntrinsicHeight() {
return mBitmapHeight;
}
@Override
public int getOpacity() {
if (mBitmapState.mGravity != Gravity.FILL) {
return PixelFormat.TRANSLUCENT;
}
final Bitmap bitmap = mBitmapState.mBitmap;
return (bitmap == null || bitmap.hasAlpha() || mBitmapState.mPaint.getAlpha() < 1) ?
PixelFormat.TRANSLUCENT : PixelFormat.OPAQUE;
}
@Override
public final ConstantState getConstantState() {
mBitmapState.mChangingConfigurations = getChangingConfigurations();
return mBitmapState;
}
final static class BitmapState extends ConstantState {
final GLPaint mPaint;
Bitmap mBitmap = null;
ColorStateList mTint = null;
int mGravity = Gravity.FILL;
float mBaseAlpha = 1.0f;
TileMode mTileModeX = null;
TileMode mTileModeY = null;
int mTargetDensity = DisplayMetrics.DENSITY_DEFAULT;
boolean mAutoMirrored = false;
int mChangingConfigurations;
boolean mRebuildShader;
BitmapState(Bitmap bitmap) {
mBitmap = bitmap;
mPaint = new GLPaint();
}
BitmapState(BitmapState bitmapState) {
mBitmap = bitmapState.mBitmap;
mTint = bitmapState.mTint;
mChangingConfigurations = bitmapState.mChangingConfigurations;
mGravity = bitmapState.mGravity;
mTileModeX = bitmapState.mTileModeX;
mTileModeY = bitmapState.mTileModeY;
mTargetDensity = bitmapState.mTargetDensity;
mBaseAlpha = bitmapState.mBaseAlpha;
mPaint = bitmapState.mPaint;
mRebuildShader = bitmapState.mRebuildShader;
mAutoMirrored = bitmapState.mAutoMirrored;
}
@Override
public Bitmap getBitmap() {
return mBitmap;
}
@Override
public Drawable newDrawable() {
return new BitmapDrawable(this, null);
}
@Override
public Drawable newDrawable(Resources res) {
return new BitmapDrawable(this, res);
}
@Override
public int getChangingConfigurations() {
return mChangingConfigurations;
}
}
/**
* The one constructor to rule them all. This is called by all public
* constructors to set the state and initialize local properties.
*/
private BitmapDrawable(BitmapState state, Resources res) {
mBitmapState = state;
initializeWithState(state, res);
}
/**
* Initializes local dynamic properties from state. This should be called
* after significant state changes, e.g. from the One True Constructor and
* after inflating or applying a theme.
*/
private void initializeWithState(BitmapState state, Resources res) {
if (res != null) {
mTargetDensity = res.getDisplayMetrics().densityDpi;
} else {
mTargetDensity = state.mTargetDensity;
}
computeBitmapSize();
}
}