// Draws a sub region of this texture on to the specified rectangle.
public void draw(GLCanvas canvas, RectF source, RectF target) {
RectF src = mSrcRect;
RectF dest = mDestRect;
float x0 = source.left;
float y0 = source.top;
float x = target.left;
float y = target.top;
float scaleX = target.width() / source.width();
float scaleY = target.height() / source.height();
synchronized (mTiles) {
for (int i = 0, n = mTiles.length; i < n; ++i) {
Tile t = mTiles[i];
src.set(0, 0, t.contentWidth, t.contentHeight);
src.offset(t.offsetX, t.offsetY);
if (!src.intersect(source)) continue;
mapRect(dest, src, x0, y0, x, y, scaleX, scaleY);
src.offset(BORDER_SIZE - t.offsetX, BORDER_SIZE - t.offsetY);
canvas.drawTexture(t, src, dest);
}
}
}
