private int rotateColor(int color, float rad) {
float deg = rad * 180 / 3.1415927f;
int r = Color.red(color);
int g = Color.green(color);
int b = Color.blue(color);
ColorMatrix cm = new ColorMatrix();
ColorMatrix tmp = new ColorMatrix();
cm.setRGB2YUV();
tmp.setRotate(0, deg);
cm.postConcat(tmp);
tmp.setYUV2RGB();
cm.postConcat(tmp);
final float[] a = cm.getArray();
int ir = floatToByte(a[0] * r + a[1] * g + a[2] * b);
int ig = floatToByte(a[5] * r + a[6] * g + a[7] * b);
int ib = floatToByte(a[10] * r + a[11] * g + a[12] * b);
return Color.argb(
Color.alpha(color), pinToByte(ir),
pinToByte(ig), pinToByte(ib));
}
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private void animateTextColor(int targetColor) {
if (mCurrentColorAnim != null) {
mCurrentColorAnim.cancel();
}
mCurrentColorAnim = new AnimatorSet();
mCurrentColorAnim.setDuration(DragView.COLOR_CHANGE_DURATION);
if (mSrcFilter == null) {
mSrcFilter = new ColorMatrix();
mDstFilter = new ColorMatrix();
mCurrentFilter = new ColorMatrix();
}
DragView.setColorScale(getTextColor(), mSrcFilter);
DragView.setColorScale(targetColor, mDstFilter);
ValueAnimator anim1 =
ValueAnimator.ofObject(
new FloatArrayEvaluator(mCurrentFilter.getArray()),
mSrcFilter.getArray(),
mDstFilter.getArray());
anim1.addUpdateListener(
new AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
mDrawable.setColorFilter(new ColorMatrixColorFilter(mCurrentFilter));
invalidate();
}
});
mCurrentColorAnim.play(anim1);
mCurrentColorAnim.play(ObjectAnimator.ofArgb(this, "textColor", targetColor));
mCurrentColorAnim.start();
}
/** Keep all colorspace representations in sync. */
private void updateYUVfromRGB() {
float r = mRGB[0] / 255.0f;
float g = mRGB[1] / 255.0f;
float b = mRGB[2] / 255.0f;
ColorMatrix cm = new ColorMatrix();
cm.setRGB2YUV();
final float[] a = cm.getArray();
mYUV[0] = a[0] * r + a[1] * g + a[2] * b;
mYUV[0] = pinToUnit(mYUV[0]);
mYUV[1] = a[5] * r + a[6] * g + a[7] * b;
mYUV[1] = pin(mYUV[1], -.5f, .5f);
mYUV[2] = a[10] * r + a[11] * g + a[12] * b;
mYUV[2] = pin(mYUV[2], -.5f, .5f);
}