/
ImagePipelineRegionDecodingFragment.java
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/
ImagePipelineRegionDecodingFragment.java
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/*
* This file provided by Facebook is for non-commercial testing and evaluation
* purposes only. Facebook reserves all rights not expressly granted.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* FACEBOOK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package com.facebook.fresco.samples.showcase.imagepipeline;
import android.graphics.Rect;
import android.graphics.drawable.Animatable;
import android.net.Uri;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.facebook.drawee.backends.pipeline.Fresco;
import com.facebook.drawee.controller.BaseControllerListener;
import com.facebook.drawee.controller.ControllerListener;
import com.facebook.drawee.view.SimpleDraweeView;
import com.facebook.fresco.samples.showcase.BaseShowcaseFragment;
import com.facebook.fresco.samples.showcase.R;
import com.facebook.fresco.samples.showcase.imagepipeline.widget.ResizableFrameLayout;
import com.facebook.fresco.samples.showcase.misc.ImageUriProvider;
import com.facebook.imagepipeline.common.ImageDecodeOptions;
import com.facebook.imagepipeline.decoder.ImageDecoder;
import com.facebook.imagepipeline.image.CloseableImage;
import com.facebook.imagepipeline.image.CloseableStaticBitmap;
import com.facebook.imagepipeline.image.EncodedImage;
import com.facebook.imagepipeline.image.ImageInfo;
import com.facebook.imagepipeline.image.QualityInfo;
import com.facebook.imagepipeline.platform.PlatformDecoder;
import com.facebook.imagepipeline.request.ImageRequestBuilder;
/** Simple region decoding example that renders the original image and a selected region. */
public class ImagePipelineRegionDecodingFragment extends BaseShowcaseFragment {
private SimpleDraweeView mFullDraweeView;
private ResizableFrameLayout mSelectedRegion;
private SimpleDraweeView mRegionDraweeView;
private Uri mUri;
private @Nullable ImageInfo mImageInfo;
private final ControllerListener<ImageInfo> mControllerListener =
new BaseControllerListener<ImageInfo>() {
@Override
public void onFinalImageSet(
String id,
@javax.annotation.Nullable ImageInfo imageInfo,
@javax.annotation.Nullable Animatable animatable) {
mImageInfo = imageInfo;
mSelectedRegion.setUpdateMaximumDimensionOnNextSizeChange(true);
if (imageInfo != null) {
mFullDraweeView.setAspectRatio(imageInfo.getWidth() / (float) imageInfo.getHeight());
mFullDraweeView.requestLayout();
updateRegion();
}
}
};
private final ResizableFrameLayout.SizeChangedListener mSizeChangedListener =
new ResizableFrameLayout.SizeChangedListener() {
@Override
public void onSizeChanged(int widthPx, int heightPx) {
updateRegion();
}
};
@Nullable
@Override
public View onCreateView(
LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_imagepipeline_region_decoding, container, false);
}
@Override
public void onViewCreated(final View view, @Nullable Bundle savedInstanceState) {
final ImageUriProvider imageUriProvider = ImageUriProvider.getInstance(getContext());
mUri =
imageUriProvider.createSampleUri(
ImageUriProvider.ImageSize.L, ImageUriProvider.Orientation.LANDSCAPE);
mFullDraweeView = (SimpleDraweeView) view.findViewById(R.id.drawee_view_full);
mFullDraweeView.setController(
Fresco.newDraweeControllerBuilder()
.setUri(mUri)
.setControllerListener(mControllerListener)
.build());
mSelectedRegion = (ResizableFrameLayout) view.findViewById(R.id.frame_main);
mSelectedRegion.init(view.findViewById(R.id.btn_resize));
mSelectedRegion.setSizeChangedListener(mSizeChangedListener);
mRegionDraweeView = (SimpleDraweeView) view.findViewById(R.id.drawee_view_region);
mRegionDraweeView.setOnClickListener(
new View.OnClickListener() {
@Override
public void onClick(View v) {
updateRegion();
}
});
}
private void updateRegion() {
if (mImageInfo == null) {
return;
}
int left = 0;
int top = 0;
int right =
mSelectedRegion.getMeasuredWidth()
* mImageInfo.getWidth()
/ mFullDraweeView.getMeasuredWidth();
int bottom =
mSelectedRegion.getMeasuredHeight()
* mImageInfo.getHeight()
/ mFullDraweeView.getMeasuredHeight();
ImageDecoder regionDecoder = createRegionDecoder(left, top, right, bottom);
mRegionDraweeView.setController(
Fresco.newDraweeControllerBuilder()
.setImageRequest(
ImageRequestBuilder.newBuilderWithSource(mUri)
.setImageDecodeOptions(
ImageDecodeOptions.newBuilder()
.setCustomImageDecoder(regionDecoder)
.build())
.build())
.build());
}
@Override
public int getTitleId() {
return R.string.imagepipeline_region_decoding_title;
}
private ImageDecoder createRegionDecoder(int left, int top, int right, int bottom) {
return new RegionDecoder(
Fresco.getImagePipelineFactory().getPlatformDecoder(), new Rect(left, top, right, bottom));
}
public static class RegionDecoder implements ImageDecoder {
private final PlatformDecoder mPlatformDecoder;
private final Rect mRegion;
public RegionDecoder(PlatformDecoder platformDecoder, Rect region) {
mPlatformDecoder = platformDecoder;
mRegion = region;
}
@Override
public CloseableImage decode(
EncodedImage encodedImage,
int length,
QualityInfo qualityInfo,
ImageDecodeOptions options) {
return new CloseableStaticBitmap(
mPlatformDecoder.decodeJPEGFromEncodedImage(
encodedImage, options.bitmapConfig, mRegion, length),
qualityInfo,
0);
}
}
}