private static Insets scaleFromDensity(Insets insets, int sdensity, int tdensity) {
int left = Bitmap.scaleFromDensity(insets.left, sdensity, tdensity);
int top = Bitmap.scaleFromDensity(insets.top, sdensity, tdensity);
int right = Bitmap.scaleFromDensity(insets.right, sdensity, tdensity);
int bottom = Bitmap.scaleFromDensity(insets.bottom, sdensity, tdensity);
return Insets.of(left, top, right, bottom);
}
/** @hide */
@Override
public Insets getOpticalInsets() {
if (needsMirroring()) {
return Insets.of(
mOpticalInsets.right, mOpticalInsets.top, mOpticalInsets.left, mOpticalInsets.bottom);
} else {
return mOpticalInsets;
}
}
NinePatchState(
@NonNull NinePatch ninePatch,
@Nullable Rect padding,
@Nullable Rect opticalInsets,
boolean dither,
boolean autoMirror) {
mNinePatch = ninePatch;
mPadding = padding;
mOpticalInsets = Insets.of(opticalInsets);
mDither = dither;
mAutoMirrored = autoMirror;
}
/** Updates the constant state from the values in the typed array. */
private void updateStateFromTypedArray(TypedArray a) throws XmlPullParserException {
final Resources r = a.getResources();
final NinePatchState state = mNinePatchState;
// Account for any configuration changes.
state.mChangingConfigurations |= a.getChangingConfigurations();
// Extract the theme attributes, if any.
state.mThemeAttrs = a.extractThemeAttrs();
state.mDither = a.getBoolean(R.styleable.NinePatchDrawable_dither, state.mDither);
final int srcResId = a.getResourceId(R.styleable.NinePatchDrawable_src, 0);
if (srcResId != 0) {
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inDither = !state.mDither;
options.inScreenDensity = r.getDisplayMetrics().noncompatDensityDpi;
final Rect padding = new Rect();
final Rect opticalInsets = new Rect();
Bitmap bitmap = null;
try {
final TypedValue value = new TypedValue();
final InputStream is = r.openRawResource(srcResId, value);
bitmap = BitmapFactory.decodeResourceStream(r, value, is, padding, options);
is.close();
} catch (IOException e) {
// Ignore
}
if (bitmap == null) {
throw new XmlPullParserException(
a.getPositionDescription() + ": <nine-patch> requires a valid src attribute");
} else if (bitmap.getNinePatchChunk() == null) {
throw new XmlPullParserException(
a.getPositionDescription() + ": <nine-patch> requires a valid 9-patch source image");
}
bitmap.getOpticalInsets(opticalInsets);
state.mNinePatch = new NinePatch(bitmap, bitmap.getNinePatchChunk());
state.mPadding = padding;
state.mOpticalInsets = Insets.of(opticalInsets);
}
state.mAutoMirrored =
a.getBoolean(R.styleable.NinePatchDrawable_autoMirrored, state.mAutoMirrored);
state.mBaseAlpha = a.getFloat(R.styleable.NinePatchDrawable_alpha, state.mBaseAlpha);
final int tintMode = a.getInt(R.styleable.NinePatchDrawable_tintMode, -1);
if (tintMode != -1) {
state.mTintMode = Drawable.parseTintMode(tintMode, Mode.SRC_IN);
}
final ColorStateList tint = a.getColorStateList(R.styleable.NinePatchDrawable_tint);
if (tint != null) {
state.mTint = tint;
}
// Update local properties.
initializeWithState(state, r);
// Push density applied by setNinePatchState into state.
state.mTargetDensity = mTargetDensity;
}