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Bug 1052751 - Part 1: Cull translated layers on the compositor. r=roc

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--HG--
extra : rebase_source : 6979b4d41c40ceb808a48ff8a1c038bbcfbed5b0
This commit is contained in:
Benoit Girard 2014-08-15 13:46:23 -04:00
parent e2eed40254
commit ce178451f6
1 changed files with 18 additions and 1 deletions
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19
gfx/layers/composite/ContainerLayerComposite.cpp
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@ -34,6 +34,9 @@
#include "TextRenderer.h" // for TextRenderer
#include <vector>
#define CULLING_LOG(...)
// #define CULLING_LOG(...) printf_stderr("CULLING: " __VA_ARGS__)
namespace mozilla {
namespace layers {
@ -321,16 +324,26 @@ ContainerPrepare(ContainerT* aContainer,
continue;
}
CULLING_LOG("Preparing sublayer %p\n", layerToRender->GetLayer());
nsIntRegion savedVisibleRegion;
bool restoreVisibleRegion = false;
gfx::Matrix matrix;
bool is2D = layerToRender->GetLayer()->GetBaseTransform().Is2D(&matrix);
if (i + 1 < children.Length() &&
layerToRender->GetLayer()->GetEffectiveTransform().IsIdentity()) {
is2D && !matrix.HasNonIntegerTranslation()) {
LayerComposite* nextLayer = static_cast<LayerComposite*>(children.ElementAt(i + 1)->ImplData());
CULLING_LOG("Culling against %p\n", nextLayer->GetLayer());
nsIntRect nextLayerOpaqueRect;
if (nextLayer && nextLayer->GetLayer()) {
nextLayerOpaqueRect = GetOpaqueRect(nextLayer->GetLayer());
gfx::Point point = matrix.GetTranslation();
nextLayerOpaqueRect.MoveBy(static_cast<int>(-point.x), static_cast<int>(-point.y));
CULLING_LOG(" point %i, %i\n", static_cast<int>(-point.x), static_cast<int>(-point.y));
CULLING_LOG(" opaque rect %i, %i, %i, %i\n", nextLayerOpaqueRect.x, nextLayerOpaqueRect.y, nextLayerOpaqueRect.width, nextLayerOpaqueRect.height);
}
if (!nextLayerOpaqueRect.IsEmpty()) {
CULLING_LOG(" draw\n");
savedVisibleRegion = layerToRender->GetShadowVisibleRegion();
nsIntRegion visibleRegion;
visibleRegion.Sub(savedVisibleRegion, nextLayerOpaqueRect);
@ -339,12 +352,16 @@ ContainerPrepare(ContainerT* aContainer,
}
layerToRender->SetShadowVisibleRegion(visibleRegion);
restoreVisibleRegion = true;
} else {
CULLING_LOG(" skip\n");
}
}
layerToRender->Prepare(clipRect);
aContainer->mPrepared->mLayers.AppendElement(PreparedLayer(layerToRender, clipRect, restoreVisibleRegion, savedVisibleRegion));
}
CULLING_LOG("Preparing container layer %p\n", aContainer->GetLayer());
/**
* Setup our temporary surface for rendering the contents of this container.
*/