rectangular tiles

[ali-shatergholi]

supporting rectangular tiles just like the previous library (TileView).

[p-lr]

Ah.. I was hoping never to see that feature request. Alright. It certainly isn't a difficult thing to do - however a significant part of the code base would be impacted.

[devjta]

@crypto-sh @p-lr that was actually quite easy.

In the non-compose one, its in TileCanvasView.kt and in drawTiles, which i already needed to change, because of our tiles having 1 pixel more on each side (so 258x258, while calucation tileSize is 256).

`

        val tileScaled = (tileSize / scaleForLevel).toInt()

        val imgMultiplier = (tileScaled / 256) //if zoomed out, it could be more than 256

        val l = tile.col * tileScaled

        val t = tile.row * tileScaled

        val r = l + tileScaled.coerceAtMost(tile.bitmap.width * imgMultiplier)

        val b = t + tileScaled.coerceAtMost(tile.bitmap.height * imgMultiplier)

        source.set(0, 0, tileScaled.coerceAtMost(tile.bitmap.width.coerceAtMost(256)),

            tileScaled.coerceAtMost(tile.bitmap.height.coerceAtMost(256)))

        dest.set(l, t, r, b)
        //...
       canvas.drawBitmap(tile.bitmap, source, dest, paint)`

In the compose one, its in TileCanvas. Still testing around, but it looks quite good.

The tile.bitmap.width.coerceAtMost(256) is needed, because our tiles can be bigger than 256. But it should never pick them for the source.

So important was, to reduce the destination rectangle. Not sure if source is needed.

Edit: Why is it so damn hard to post code here..