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Speed up rendering map border shroud when no shroud is visible.

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When the map border shroud must be rendered, but no cells at the border are visible, then we know that no shroud will be visible at all. We can bail from rendering early in this case.
This commit is contained in:
RoosterDragon
2015-02-25 20:17:02 +00:00
parent cee3d6cf9e
commit 803390c68e
1 changed files with 13 additions and 13 deletions
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26
OpenRA.Mods.Common/Traits/World/ShroudRenderer.cs
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@@ -201,7 +201,7 @@ namespace OpenRA.Mods.Common.Traits
public void RenderShroud(WorldRenderer wr, Shroud shroud)
{
Update(shroud);
Render(wr.Viewport.VisibleCells);
Render(CellRegion.Expand(wr.Viewport.VisibleCells, 1));
}
void Update(Shroud newShroud)
@@ -269,22 +269,22 @@ namespace OpenRA.Mods.Common.Traits
void Render(CellRegion visibleRegion)
{
var renderRegion = CellRegion.Expand(visibleRegion, 1).MapCoords;
if (currentShroud == null)
RenderMapBorderShroud(visibleRegion);
else
RenderPlayerShroud(visibleRegion);
}
void RenderMapBorderShroud(CellRegion visibleRegion)
{
RenderMapBorderShroud(renderRegion);
// The map border shroud only affects the map border. If none of the visible cells are on the border, then
// we don't need to render anything and can bail early for performance.
if (map.Cells.Contains(visibleRegion))
return;
}
RenderPlayerShroud(visibleRegion, renderRegion);
}
void RenderMapBorderShroud(CellRegion.MapCoordsRegion renderRegion)
{
// Render the shroud that just encroaches at the map border. This shroud is always fully cached, so we can
// just render straight from the cache.
foreach (var uv in renderRegion)
foreach (var uv in visibleRegion.MapCoords)
{
var offset = VertexArrayOffset(uv);
RenderCachedTile(shroudSpriteLayer[uv], shroudVertices, offset);
@@ -292,7 +292,7 @@ namespace OpenRA.Mods.Common.Traits
}
}
void RenderPlayerShroud(CellRegion visibleRegion, CellRegion.MapCoordsRegion renderRegion)
void RenderPlayerShroud(CellRegion visibleRegion)
{
// Render the shroud by drawing the appropriate tile over each cell that is visible on-screen.
// For performance we keep a cache tiles we have drawn previously so we don't have to recalculate the
@@ -303,7 +303,7 @@ namespace OpenRA.Mods.Common.Traits
// cached vertices.
var visibleUnderShroud = currentShroud.IsExploredTest(visibleRegion);
var visibleUnderFog = currentShroud.IsVisibleTest(visibleRegion);
foreach (var uv in renderRegion)
foreach (var uv in visibleRegion.MapCoords)
{
var offset = VertexArrayOffset(uv);
if (shroudDirty[uv])