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do not retrieve source tiles which actually don't get used. Code from

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jmakovicka 

Signed-off-by: yvecai <yvecai@gmail.com>
This commit is contained in:
yvecai 2012-02-09 00:30:07 +01:00 committed by Jindřich Makovička
parent a0833cb486
commit 8a753b2ef7
1 changed files with 62 additions and 170 deletions
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232
OsmAnd/src/net/osmand/plus/SQLiteTileSource.java
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@ -38,6 +38,9 @@ public class SQLiteTileSource implements ITileSource {
private int minZoom = 1;
private int maxZoom = 17;
private int baseZoom = 17; //Default base zoom
final int margin = 6;
final int tileSize = 256;
public SQLiteTileSource(File f, List<TileSourceTemplate> toFindUrl){
this.file = f;
@ -86,7 +89,7 @@ public class SQLiteTileSource implements ITileSource {
@Override
public int getTileSize() {
return base != null ? base.getTileSize() : 256;
return base != null ? base.getTileSize() : tileSize;
}
@Override
@ -198,7 +201,7 @@ public class SQLiteTileSource implements ITileSource {
return db.isDbLockedByOtherThreads();
}
private Bitmap getMetaTile(int x, int y, int zoom) {
private Bitmap getMetaTile(int x, int y, int zoom, int flags) {
// return a 268x268 tile ((6+256+6)x(6+256+6) px) around a given tile
// based on its neighbor. This is needed to have a nice bilinear resampling
// on tile edges. A 258x258 would do well, but maybe somebody wants to
@ -210,161 +213,39 @@ public class SQLiteTileSource implements ITileSource {
if(db == null){
return null;
}
Bitmap stitchedImage = Bitmap.createBitmap(268, 268, Config.ARGB_8888);
Bitmap stitchedImage = Bitmap.createBitmap(tileSize + 2 * margin, tileSize + 2 * margin, Config.ARGB_8888);
Canvas canvas = new Canvas(stitchedImage);
//1
Cursor cursor = db.rawQuery(
"SELECT image FROM tiles WHERE x = ? AND y = ? AND z = ?",
new String[] {(x-1)+"", (y-1)+"",(17 - zoom)+""}); //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$//$NON-NLS-4$
byte[] blob = null;
if(cursor.moveToFirst()) {
blob = cursor.getBlob(0);
}
cursor.close();
if(blob != null){
Bitmap Tile = BitmapFactory.decodeByteArray(blob, 0, blob.length);
blob = null;
Rect src = new Rect(250, 250, 256, 256);
Rect dst = new Rect(0,0,6,6);
canvas.drawBitmap(Tile, src, dst, null);
//Tile.recycle();
}
//2
cursor = db.rawQuery(
"SELECT image FROM tiles WHERE x = ? AND y = ? AND z = ?",
new String[] {(x)+"", (y-1)+"",(17 - zoom)+""}); //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$//$NON-NLS-4$
blob = null;
if(cursor.moveToFirst()) {
blob = cursor.getBlob(0);
}
cursor.close();
if(blob != null){
Bitmap Tile = BitmapFactory.decodeByteArray(blob, 0, blob.length);
blob = null;
Rect src = new Rect(0, 250, 256, 256);
Rect dst = new Rect(6,0,262,6);
canvas.drawBitmap(Tile, src, dst, null);
//Tile.recycle();
}
//3
cursor = db.rawQuery(
"SELECT image FROM tiles WHERE x = ? AND y = ? AND z = ?",
new String[] {(x+1)+"", (y-1)+"",(17 - zoom)+""}); //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$//$NON-NLS-4$
blob = null;
if(cursor.moveToFirst()) {
blob = cursor.getBlob(0);
}
cursor.close();
if(blob != null){
Bitmap Tile = BitmapFactory.decodeByteArray(blob, 0, blob.length);
blob = null;
Rect src = new Rect(0, 250, 6, 256);
Rect dst = new Rect(262,0,268,6);
canvas.drawBitmap(Tile, src, dst, null);
//Tile.recycle();
}
//4
cursor = db.rawQuery(
"SELECT image FROM tiles WHERE x = ? AND y = ? AND z = ?",
new String[] {(x-1)+"", (y)+"",(17 - zoom)+""}); //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$//$NON-NLS-4$
blob = null;
if(cursor.moveToFirst()) {
blob = cursor.getBlob(0);
}
cursor.close();
if(blob != null){
Bitmap Tile = BitmapFactory.decodeByteArray(blob, 0, blob.length);
blob = null;
Rect src = new Rect(250, 0, 256, 256);
Rect dst = new Rect(0,6,6,262);
canvas.drawBitmap(Tile, src, dst, null);
//Tile.recycle();
}
//5
cursor = db.rawQuery(
"SELECT image FROM tiles WHERE x = ? AND y = ? AND z = ?",
new String[] {(x)+"", y+"",(17 - zoom)+""}); //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$//$NON-NLS-4$
blob = null;
if(cursor.moveToFirst()) {
blob = cursor.getBlob(0);
}
cursor.close();
if(blob != null){
Bitmap Tile = BitmapFactory.decodeByteArray(blob, 0, blob.length);
blob = null;
Rect src = new Rect(0, 0, 256, 256);
Rect dst = new Rect(6,6,262,262);
canvas.drawBitmap(Tile, src, dst, null);
//Tile.recycle();
}
//6
cursor = db.rawQuery(
"SELECT image FROM tiles WHERE x = ? AND y = ? AND z = ?",
new String[] {(x+1)+"", (y)+"",(17 - zoom)+""}); //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$//$NON-NLS-4$
blob = null;
if(cursor.moveToFirst()) {
blob = cursor.getBlob(0);
}
cursor.close();
if(blob != null){
Bitmap Tile = BitmapFactory.decodeByteArray(blob, 0, blob.length);
blob = null;
Rect src = new Rect(0, 0, 6, 256);
Rect dst = new Rect(262,6,268,262);
canvas.drawBitmap(Tile, src, dst, null);
//Tile.recycle();
}
//7
cursor = db.rawQuery(
"SELECT image FROM tiles WHERE x = ? AND y = ? AND z = ?",
new String[] {(x-1)+"", (y+1)+"",(17 - zoom)+""}); //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$//$NON-NLS-4$
blob = null;
if(cursor.moveToFirst()) {
blob = cursor.getBlob(0);
}
cursor.close();
if(blob != null){
Bitmap Tile = BitmapFactory.decodeByteArray(blob, 0, blob.length);
blob = null;
Rect src = new Rect(250, 0, 256, 6);
Rect dst = new Rect(0,262,6,268);
canvas.drawBitmap(Tile, src, dst, null);
//Tile.recycle();
}
//8
cursor = db.rawQuery(
"SELECT image FROM tiles WHERE x = ? AND y = ? AND z = ?",
new String[] {(x)+"", (y+1)+"",(17 - zoom)+""}); //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$//$NON-NLS-4$
blob = null;
if(cursor.moveToFirst()) {
blob = cursor.getBlob(0);
}
cursor.close();
if(blob != null){
Bitmap Tile = BitmapFactory.decodeByteArray(blob, 0, blob.length);
blob = null;
Rect src = new Rect(0, 0, 256, 6);
Rect dst = new Rect(6,262,262,268);
canvas.drawBitmap(Tile, src, dst, null);
//Tile.recycle();
}
//9
cursor = db.rawQuery(
"SELECT image FROM tiles WHERE x = ? AND y = ? AND z = ?",
new String[] {(x+1)+"", (y+1)+"",(17 - zoom)+""}); //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$//$NON-NLS-4$
blob = null;
if(cursor.moveToFirst()) {
blob = cursor.getBlob(0);
}
cursor.close();
if(blob != null){
Bitmap Tile = BitmapFactory.decodeByteArray(blob, 0, blob.length);
blob = null;
Rect src = new Rect(0, 0, 6, 6);
Rect dst = new Rect(262,262,268,268);
canvas.drawBitmap(Tile, src, dst, null);
Tile.recycle();
}
for (int dx = -1; dx <= 1; dx++) {
for (int dy = -1; dy <= 1; dy++) {
if ((flags & (0x400 >> (4 * (dy + 1) + (dx + 1)))) == 0)
continue;
int xOff, yOff, w, h;
int dstx, dsty;
Cursor cursor = db.rawQuery(
"SELECT image FROM tiles WHERE x = ? AND y = ? AND z = ?",
new String[] {(x + dx) + "", (y + dy) + "", (17 - zoom) + ""}); //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$//$NON-NLS-4$
byte[] blob = null;
if(cursor.moveToFirst()) {
blob = cursor.getBlob(0);
}
cursor.close();
if (dx < 0) xOff = tileSize - margin; else xOff = 0;
if (dx == 0) w = tileSize; else w = margin;
if (dy < 0) yOff = tileSize - margin; else yOff = 0;
if (dy == 0) h = tileSize; else h = margin;
dstx = dx * tileSize + xOff + margin;
dsty = dy * tileSize + yOff + margin;
if(blob != null){
Bitmap Tile = BitmapFactory.decodeByteArray(blob, 0, blob.length);
blob = null;
Rect src = new Rect(xOff, yOff, xOff + w, yOff + h);
Rect dst = new Rect(dstx, dsty, dstx + w, dsty + h);
canvas.drawBitmap(Tile, src, dst, null);
}
}
}
System.gc();
return stitchedImage; // return a 256x256 tile + 6px margin
@ -374,6 +255,7 @@ public class SQLiteTileSource implements ITileSource {
if(db == null){
return null;
}
if (zoom > maxZoom) return null;
if ( zoom <= baseZoom) {
// return the normal tile if exists
Cursor cursor = db.rawQuery("SELECT image FROM tiles WHERE x = ? AND y = ? AND z = ?", new String[] {x+"", y+"",(17 - zoom)+""}); //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$//$NON-NLS-4$
@ -389,30 +271,40 @@ public class SQLiteTileSource implements ITileSource {
} else {
// return a resampled tile from its last parent
int n = zoom - baseZoom;
int base_xtile = (int)(x / Math.pow(2,n));
int base_ytile = (int)(y / Math.pow(2,n));
Bitmap metaTile = getMetaTile(base_xtile, base_ytile, baseZoom);
int base_xtile = x >> n;
int base_ytile = y >> n;
int scaledSize= tileSize >> n;
int offset_x= x - (base_xtile << n);
int offset_y= y - (base_ytile << n);
int flags = 0x020;
if (offset_x == 0)
flags |= 0x444;
else if (offset_x == (1 << n) - 1)
flags |= 0x111;
if (offset_y == 0)
flags |= 0x700;
else if (offset_y == (1 << n) - 1)
flags |= 0x007;
Bitmap metaTile = getMetaTile(base_xtile, base_ytile, baseZoom, flags);
if(metaTile != null){
//return Bitmap.createScaledBitmap(metaTile,256,256,false);
// in tile space:
int scaledSize= (int)(256/Math.pow(2,n));
int offset_x= (int)((x - base_xtile*Math.pow(2,n)));
int offset_y= (int)((y - base_ytile*Math.pow(2,n)));
int delta_px = (int)(scaledSize*offset_x);
int delta_py = (int)(scaledSize*offset_y);
int delta_px = scaledSize * offset_x;
int delta_py = scaledSize * offset_y;
Bitmap xn = Bitmap.createBitmap(metaTile,
delta_px, //(+6)
delta_py, //(+6)
scaledSize+12,
scaledSize+12);
scaledSize + 2 * margin,
scaledSize + 2 * margin);
metaTile.recycle();
int scaleto = (int)(256+12*Math.pow(2,n));
int scaleto = 256 + ((2 * margin) << n);
Bitmap scaled = Bitmap.createScaledBitmap(xn,scaleto,scaleto,true);
xn.recycle();
return Bitmap.createBitmap(scaled,(int)(6*Math.pow(2,n)),(int)(6*Math.pow(2,n)),256,256);
return Bitmap.createBitmap(scaled, (margin << n), (margin << n), 256, 256);
}
return null;
}