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import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.graphics.Rect;
import android.graphics.drawable.NinePatchDrawable;
import android.util.DisplayMetrics;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.ArrayList;
import java.util.List;
/**
* User: bgriffey
* Date: 12/27/12
* Time: 2:37 PM
*/
public class NinePatchBitmapFactory {
private static final int NO_COLOR = 0x00000001;
private static final int TRANSPARENT_COLOR = 0x00000000;
public static NinePatchDrawable createNinePatchDrawable(Resources res, Bitmap bitmap) {
RangeLists rangeLists = checkBitmap(bitmap);
Bitmap trimedBitmap = trimBitmap(bitmap);
NinePatchDrawable drawable = createNinePatchWithCapInsets( res , trimedBitmap , rangeLists.rangeListX , rangeLists.rangeListY , null );
return drawable;
}
public static NinePatchDrawable createNinePatchWithCapInsets(Resources res, Bitmap bitmap,
List<Range> rangeListX, List<Range> rangeListY , String srcName) {
ByteBuffer buffer = getByteBuffer(rangeListX,rangeListY);
NinePatchDrawable drawable = new NinePatchDrawable(res,bitmap, buffer.array(), new Rect(), srcName);
return drawable;
}
private static ByteBuffer getByteBuffer(List<Range> rangeListX, List<Range> rangeListY) {
ByteBuffer buffer = ByteBuffer.allocate(4 + 4*7 + 4*2*rangeListX.size() + 4*2*rangeListY.size() + 4*9).order(ByteOrder.nativeOrder());
buffer.put((byte)0x01); // was serialised
buffer.put((byte) (rangeListX.size() * 2) ); // x div
buffer.put((byte) (rangeListY.size() * 2) ); // y div
buffer.put((byte)0x09); // color
// skip
buffer.putInt(0);
buffer.putInt(0);
// padding
buffer.putInt(0);
buffer.putInt(0);
buffer.putInt(0);
buffer.putInt(0);
// skip 4 bytes
buffer.putInt(0);
for (Range range : rangeListX) {
buffer.putInt( range.start );
buffer.putInt( range.end );
}
for (Range range : rangeListY) {
buffer.putInt( range.start);
buffer.putInt( range.end );
}
buffer.putInt(NO_COLOR);
buffer.putInt(NO_COLOR);
buffer.putInt(NO_COLOR);
buffer.putInt(NO_COLOR);
buffer.putInt(NO_COLOR);
buffer.putInt(NO_COLOR);
buffer.putInt(NO_COLOR);
buffer.putInt(NO_COLOR);
buffer.putInt(NO_COLOR);
return buffer;
}
public static class RangeLists {
public List<Range> rangeListX;
public List<Range> rangeListY;
}
public static class Range {
public int start;
public int end;
}
public static RangeLists checkBitmap(Bitmap bitmap) {
int width = bitmap.getWidth();
int height = bitmap.getHeight();
List<Range> rangeListX = new ArrayList<Range>();
int pos = -1;
for (int i=1;i<width-1;i++) {
int color = bitmap.getPixel(i, 0);
int alpha = Color.alpha( color );
int red = Color.red( color );
int green = Color.green( color );
int blue = Color.blue( color );
// System.out.println( String.valueOf(alpha) + "," + String.valueOf(red) + "," + String.valueOf(green) + "," + String.valueOf(blue) );
if (alpha == 255 && red == 0 && green == 0 && blue == 0) {
if (pos == -1) {
pos = i-1;
}
} else {
if (pos != -1) {
Range range = new Range();
range.start = pos;
range.end = i-1;
rangeListX.add( range );
pos = -1;
}
}
}
if (pos != -1) {
Range range = new Range();
range.start = pos;
range.end = width-2;
rangeListX.add( range );
}
for (Range range : rangeListX) {
System.out.println( "(" + range.start + "," + range.end + ")" );
}
List<Range> rangeListY = new ArrayList<Range>();
pos = -1;
for (int i=1;i<height-1;i++) {
int color = bitmap.getPixel(0, i);
int alpha = Color.alpha( color );
int red = Color.red( color );
int green = Color.green( color );
int blue = Color.blue( color );
if (alpha == 255 && red == 0 && green == 0 && blue == 0) {
if (pos == -1) {
pos = i-1;
}
} else {
if (pos != -1) {
Range range = new Range();
range.start = pos;
range.end = i-1;
rangeListY.add( range );
pos = -1;
}
}
}
if (pos != -1) {
Range range = new Range();
range.start = pos;
range.end = height-2;
rangeListY.add( range );
}
for (Range range : rangeListY) {
System.out.println( "(" + range.start + "," + range.end + ")" );
}
RangeLists rangeLists = new RangeLists();
rangeLists.rangeListX = rangeListX;
rangeLists.rangeListY = rangeListY;
return rangeLists;
}
public static Bitmap trimBitmap(Bitmap bitmap) {
int width = bitmap.getWidth();
int height = bitmap.getHeight();
Bitmap result = Bitmap.createBitmap(bitmap , 1 , 1 , width -2 , height -2 );
return result;
}
public static Bitmap loadBitmap(File file) {
BufferedInputStream bis = null;
try {
bis = new BufferedInputStream( new FileInputStream(file) );
return BitmapFactory.decodeStream(bis);
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
bis.close();
} catch (Exception e) {
}
}
return null;
}
public static String getDensityPostfix(Resources res) {
String result = null;
switch (res.getDisplayMetrics().densityDpi) {
case DisplayMetrics.DENSITY_LOW:
result = "ldpi";
break;
case DisplayMetrics.DENSITY_MEDIUM:
result = "mdpi";
break;
case DisplayMetrics.DENSITY_HIGH:
result = "hdpi";
break;
case DisplayMetrics.DENSITY_XHIGH:
result = "xhdpi";
break;
case DisplayMetrics.DENSITY_XXHIGH:
result = "xxhdpi";
break;
case DisplayMetrics.DENSITY_XXXHIGH:
result = "xxxhdpi";
break;
}
return result;
}
}
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