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Add Image Editor support for blur mask layer.

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This commit is contained in:
Alan Evans
2020-06-03 03:30:24 -03:00
parent 32e9901592
commit 514048171b
5 changed files with 101 additions and 5 deletions
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67
app/src/main/java/org/thoughtcrime/securesms/scribbles/UriGlideRenderer.java
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@@ -2,13 +2,20 @@ package org.thoughtcrime.securesms.scribbles;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BlurMaskFilter;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Point;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.RectF;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.Parcel;
import android.renderscript.Allocation;
import android.renderscript.Element;
import android.renderscript.RenderScript;
import android.renderscript.ScriptIntrinsicBlur;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
@@ -20,6 +27,8 @@ import com.bumptech.glide.request.transition.Transition;
import org.thoughtcrime.securesms.imageeditor.Bounds;
import org.thoughtcrime.securesms.imageeditor.Renderer;
import org.thoughtcrime.securesms.imageeditor.RendererContext;
import org.thoughtcrime.securesms.imageeditor.model.EditorElement;
import org.thoughtcrime.securesms.imageeditor.model.EditorModel;
import org.thoughtcrime.securesms.mms.DecryptableStreamUriLoader;
import org.thoughtcrime.securesms.mms.GlideApp;
import org.thoughtcrime.securesms.mms.GlideRequest;
@@ -43,8 +52,10 @@ final class UriGlideRenderer implements Renderer {
private final int maxWidth;
private final int maxHeight;
@Nullable
private Bitmap bitmap;
@Nullable private Bitmap bitmap;
@Nullable private Bitmap blurredBitmap;
@Nullable private Paint blurPaint;
@Nullable private BlurMaskFilter blurMaskFilter;
UriGlideRenderer(@NonNull Uri imageUri, boolean decryptable, int maxWidth, int maxHeight) {
this.imageUri = imageUri;
@@ -94,17 +105,52 @@ final class UriGlideRenderer implements Renderer {
int alpha = paint.getAlpha();
paint.setAlpha(rendererContext.getAlpha(alpha));
rendererContext.canvas.drawBitmap(bitmap, 0, 0, paint);
rendererContext.canvas.drawBitmap(bitmap, 0, 0, rendererContext.getMaskPaint() != null ? rendererContext.getMaskPaint() : paint);
paint.setAlpha(alpha);
rendererContext.restore();
renderBlurOverlay(rendererContext);
} else if (rendererContext.isBlockingLoad()) {
// If failed to load, we draw a black out, in case image was sticker positioned to cover private info.
rendererContext.canvas.drawRect(Bounds.FULL_BOUNDS, paint);
}
}
private void renderBlurOverlay(RendererContext rendererContext) {
boolean renderMask = false;
for (EditorElement child : rendererContext.getChildren()) {
if (child.getZOrder() == EditorModel.Z_MASK) {
renderMask = true;
if (blurMaskFilter == null) {
blurMaskFilter = new BlurMaskFilter(4, BlurMaskFilter.Blur.NORMAL); // This blurs edges of the mask shapes
}
if (blurPaint == null) {
blurPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
blurPaint.setMaskFilter(blurMaskFilter);
}
blurPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT));
rendererContext.setMaskPaint(blurPaint);
child.draw(rendererContext);
}
}
if (renderMask) {
rendererContext.save();
rendererContext.canvasMatrix.concat(imageProjectionMatrix);
blurPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_ATOP));
blurPaint.setMaskFilter(null);
if (blurredBitmap == null) blurredBitmap = blur(bitmap, rendererContext.context);
rendererContext.canvas.drawBitmap(blurredBitmap, 0, 0, blurPaint);
blurPaint.setXfermode(null);
rendererContext.restore();
}
}
private GlideRequest<Bitmap> getBitmapGlideRequest(@NonNull Context context, boolean preview) {
int width = this.maxWidth;
int height = this.maxHeight;
@@ -177,6 +223,21 @@ final class UriGlideRenderer implements Renderer {
return matrix;
}
private static @NonNull Bitmap blur(@NonNull Bitmap bitmap, @NonNull Context context) {
RenderScript rs = RenderScript.create(context);
Allocation input = Allocation.createFromBitmap(rs, bitmap);
Allocation output = Allocation.createTyped (rs, input.getType());
ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));
script.setRadius(25f);
script.setInput(input);
script.forEach(output);
Bitmap blurred = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), bitmap.getConfig());
output.copyTo(blurred);
return blurred;
}
public static final Creator<UriGlideRenderer> CREATOR = new Creator<UriGlideRenderer>() {
@Override
public UriGlideRenderer createFromParcel(Parcel in) {