diff options
| author | Michael Meeks <michael.meeks@collabora.com> | 2020-09-09 12:02:50 +0100 |
|---|---|---|
| committer | Jan Holesovsky <kendy@collabora.com> | 2020-09-17 15:03:01 +0200 |
| commit | 26e87932aee04b2bf23e4af9dc53755ac0e27c02 (patch) | |
| tree | 5e3e2d9b748110b4dda82441decbb3f9631b0945 /loleaflet | |
| parent | d1971d3a7ddd1973c415b9cbe202f39a0b39faee (diff) | |
calc tiles: clarify some magic.
Change-Id: I2d95dd09b5640a5216e72366493ddf77541c8b73
Diffstat (limited to 'loleaflet')
| -rw-r--r-- | loleaflet/src/layer/tile/CanvasTileLayer.js | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/loleaflet/src/layer/tile/CanvasTileLayer.js b/loleaflet/src/layer/tile/CanvasTileLayer.js index 2b8eb00db..91be11179 100644 --- a/loleaflet/src/layer/tile/CanvasTileLayer.js +++ b/loleaflet/src/layer/tile/CanvasTileLayer.js @@ -161,7 +161,9 @@ L.CanvasTilePainter = L.Class.extend({ var tileBounds = new L.Bounds(tileTopLeft, tileTopLeft.add(ctx.tileSize)); for (var i = 0; i < ctx.paneBoundsList.length; ++i) { + // co-ordinates of this pane in core document pixels var paneBounds = this._layer._cssBoundsToCore(ctx.paneBoundsList[i]); + // co-ordinates of the main-(bottom right) pane in core document pixels var viewBounds = this._layer._cssBoundsToCore(ctx.viewBounds); // into real pixel-land ... @@ -171,9 +173,10 @@ L.CanvasTilePainter = L.Class.extend({ if (!paneBounds.intersects(tileBounds)) continue; - var offset = paneBounds.getTopLeft(); // allocates - offset.x = Math.min(offset.x, viewBounds.min.x); - offset.y = Math.min(offset.y, viewBounds.min.y); + var paneOffset = paneBounds.getTopLeft(); // allocates + // Cute way to detect the in-canvas pixel offset of each pane + paneOffset.x = Math.min(paneOffset.x, viewBounds.min.x); + paneOffset.y = Math.min(paneOffset.y, viewBounds.min.y); // intersect - to avoid state thrash through clipping var crop = new L.Bounds(tileBounds.min, tileBounds.max); @@ -189,8 +192,8 @@ L.CanvasTilePainter = L.Class.extend({ crop.min.x - tileBounds.min.x, crop.min.y - tileBounds.min.y, cropWidth, cropHeight, - crop.min.x - offset.x, - crop.min.y - offset.y, + crop.min.x - paneOffset.x, + crop.min.y - paneOffset.y, cropWidth, cropHeight); if (this._layer._debug) { |