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Bug 1221073 - Increase max tile size to 1024 again. r=mstange

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Make the heuristic for the tile size aim for > 2 and <= 4 tiles per
screen width, but no larger than 1024. This increases the tile size back
up to 1024 on retina macbooks.
This commit is contained in:
Jamie Nicol 2015-12-08 21:42:43 +00:00
parent 6b64a3e361
commit 809e288246
1 changed files with 5 additions and 5 deletions
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10
gfx/thebes/gfxPlatform.cpp
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@ -120,6 +120,7 @@ class mozilla::gl::SkiaGLGlue : public GenericAtomicRefCounted {
#include "mozilla/Attributes.h"
#include "mozilla/Mutex.h"
#include "nsAlgorithm.h"
#include "nsIGfxInfo.h"
#include "nsIXULRuntime.h"
#include "VsyncSource.h"
@ -1067,11 +1068,10 @@ gfxPlatform::ComputeTileSize()
if (gfxPrefs::LayersTilesAdjust()) {
gfx::IntSize screenSize = GetScreenSize();
if (screenSize.width > 0) {
// For the time being tiles larger than 512 probably do not make much
// sense. This is due to e.g. increased rasterisation time outweighing
// the decreased composition time, or large increases in memory usage
// for screens slightly wider than a higher power of two.
w = h = screenSize.width >= 512 ? 512 : 256;
// Choose a size so that there are between 2 and 4 tiles per screen width.
// FIXME: we should probably make sure this is within the max texture size,
// but I think everything should at least support 1024
w = h = clamped(NextPowerOfTwo(screenSize.width) / 4, 256, 1024);
}
#ifdef MOZ_WIDGET_GONK