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/*
* Copyright (C) 2012 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.android.gallery3d.filtershow.filters;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.support.v8.renderscript.*;
import android.util.Log;
import com.android.gallery3d.R;
public abstract class ImageFilterRS extends ImageFilter {
private final String LOGTAG = "ImageFilterRS";
private static RenderScript mRS = null;
protected static Allocation mInPixelsAllocation;
protected static Allocation mOutPixelsAllocation;
private static android.content.res.Resources mResources = null;
private static Bitmap sOldBitmap = null;
private Bitmap mOldBitmap = null;
private boolean mResourcesLoaded = false;
private final Bitmap.Config mBitmapConfig = Bitmap.Config.ARGB_8888;
public void resetBitmap() {
mOldBitmap = null;
}
public void prepare(Bitmap bitmap, float scaleFactor, int quality) {
if (sOldBitmap == null
|| (bitmap.getWidth() != sOldBitmap.getWidth())
|| (bitmap.getHeight() != sOldBitmap.getHeight())) {
if (mInPixelsAllocation != null) {
mInPixelsAllocation.destroy();
mInPixelsAllocation = null;
}
if (mOutPixelsAllocation != null) {
mOutPixelsAllocation.destroy();
mOutPixelsAllocation = null;
}
Bitmap bitmapBuffer = bitmap.copy(mBitmapConfig, true);
mOutPixelsAllocation = Allocation.createFromBitmap(mRS, bitmapBuffer,
Allocation.MipmapControl.MIPMAP_NONE, Allocation.USAGE_SCRIPT);
mInPixelsAllocation = Allocation.createTyped(mRS,
mOutPixelsAllocation.getType());
sOldBitmap = bitmap;
}
mInPixelsAllocation.copyFrom(bitmap);
if (mOldBitmap != sOldBitmap || !isResourcesLoaded()) {
freeResources();
createFilter(mResources, scaleFactor, quality);
mOldBitmap = sOldBitmap;
setResourcesLoaded(true);
}
}
abstract public void createFilter(android.content.res.Resources res,
float scaleFactor, int quality);
abstract public void runFilter();
public void update(Bitmap bitmap) {
mOutPixelsAllocation.copyTo(bitmap);
}
@Override
public Bitmap apply(Bitmap bitmap, float scaleFactor, int quality) {
if (bitmap == null) {
return bitmap;
}
try {
prepare(bitmap, scaleFactor, quality);
runFilter();
update(bitmap);
} catch (android.renderscript.RSIllegalArgumentException e) {
Log.e(LOGTAG, "Illegal argument? " + e);
} catch (android.renderscript.RSRuntimeException e) {
Log.e(LOGTAG, "RS runtime exception ? " + e);
} catch (java.lang.OutOfMemoryError e) {
// Many of the renderscript filters allocated large (>16Mb resources) in order to apply.
System.gc();
displayLowMemoryToast();
Log.e(LOGTAG, "not enough memory for filter " + getName(), e);
}
return bitmap;
}
public static RenderScript getRenderScriptContext() {
return mRS;
}
public static void setRenderScriptContext(Activity context) {
if (mRS == null) {
mRS = RenderScript.create(context);
}
mResources = context.getResources();
if (mInPixelsAllocation != null) {
mInPixelsAllocation.destroy();
mInPixelsAllocation = null;
}
if (mOutPixelsAllocation != null) {
mOutPixelsAllocation.destroy();
mOutPixelsAllocation = null;
}
sOldBitmap = null;
}
private Allocation convertBitmap(Bitmap bitmap) {
return Allocation.createFromBitmap(mRS, bitmap,
Allocation.MipmapControl.MIPMAP_NONE, Allocation.USAGE_SCRIPT);
}
private Allocation convertRGBAtoA(Bitmap bitmap) {
Type.Builder tb_a8 = new Type.Builder(mRS, Element.U8(mRS));
ScriptC_grey greyConvert = new ScriptC_grey(mRS, mResources, R.raw.grey);
Allocation bitmapTemp = convertBitmap(bitmap);
if (bitmapTemp.getType().getElement().isCompatible(Element.U8(mRS))) {
return bitmapTemp;
}
tb_a8.setX(bitmapTemp.getType().getX());
tb_a8.setY(bitmapTemp.getType().getY());
Allocation bitmapAlloc = Allocation.createTyped(mRS, tb_a8.create());
greyConvert.forEach_RGBAtoA(bitmapTemp, bitmapAlloc);
return bitmapAlloc;
}
public Allocation loadResourceAlpha(int resource) {
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.ALPHA_8;
Bitmap bitmap = BitmapFactory.decodeResource(
mRS.getApplicationContext().getResources(),
resource, options);
Allocation ret = convertRGBAtoA(bitmap);
bitmap.recycle();
return ret;
}
public Allocation loadResource(int resource) {
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
Bitmap bitmap = BitmapFactory.decodeResource(
mRS.getApplicationContext().getResources(),
resource, options);
Allocation ret = convertBitmap(bitmap);
bitmap.recycle();
return ret;
}
public boolean isResourcesLoaded() {
return mResourcesLoaded;
}
public void setResourcesLoaded(boolean resourcesLoaded) {
mResourcesLoaded = resourcesLoaded;
}
abstract protected void resetAllocations();
public void freeResources() {
if (!isResourcesLoaded()) {
return;
}
resetAllocations();
setResourcesLoaded(false);
}
}
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