ashatora/openlayers
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Clean up calculation of framebuffer extent and size

Browse Source
This commit is contained in:
Tom Payne
2012-08-06 01:19:41 +02:00
parent 530724235a
commit fe8c064a2e
1 changed files with 13 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
src/ol/webgl/tilelayerrenderer.js
View File

@@ -1,7 +1,7 @@
// FIXME large resolutions lead to too large framebuffers :-(
// FIXME animated shaders! check in redraw
// FIXME defer texture uploads and delete* calls
// FIXME this now breaks for intermediate resolutions :-(
// FIXME strange things happen at very large zooms
goog.provide('ol.webgl.TileLayerRenderer');
goog.provide('ol.webgl.tilelayerrenderer.shader.Fragment');
@@ -272,17 +272,18 @@ ol.webgl.TileLayerRenderer.prototype.render = function() {
tileBoundsSize.height * tileSize.height);
var framebufferDimension =
Math.pow(2, Math.ceil(Math.log(maxDimension) / Math.log(2)));
var nTilesX = framebufferDimension / tileSize.width;
var nTilesY = framebufferDimension / tileSize.height;
var framebufferTileBounds = new ol.TileBounds(
tileBounds.minX,
tileBounds.minY,
tileBounds.minX + nTilesX - 1,
tileBounds.minY + nTilesY - 1);
goog.asserts.assert(framebufferTileBounds.containsTileBounds(tileBounds));
var framebufferExtent =
tileGrid.getTileBoundsExtent(z, framebufferTileBounds);
var framebufferExtentSize = framebufferExtent.getSize();
var framebufferExtentSize = new ol.Size(
mapResolution * framebufferDimension,
mapResolution * framebufferDimension);
var origin = tileGrid.getOrigin(z);
var tileResolution = tileGrid.getResolution(z);
var minX = origin.x + tileBounds.minX * tileSize.width * tileResolution;
var minY = origin.y + tileBounds.minY * tileSize.height * tileResolution;
var framebufferExtent = new ol.Extent(
minX,
minY,
minX + framebufferExtentSize.width,
minY + framebufferExtentSize.height);
this.bindFramebuffer_(framebufferDimension);
gl.viewport(0, 0, framebufferDimension, framebufferDimension);