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// Copyright 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "cc/layer_tree_settings.h"
#include <limits>
#include "base/command_line.h"
#include "base/logging.h"
#include "base/string_number_conversions.h"
#include "cc/switches.h"
namespace cc {
LayerTreeSettings::LayerTreeSettings()
: acceleratePainting(false)
, compositorFrameMessage(false)
, implSidePainting(false)
, renderVSyncEnabled(true)
, perTilePaintingEnabled(false)
, partialSwapEnabled(false)
, rightAlignedSchedulingEnabled(false)
, acceleratedAnimationEnabled(true)
, pageScalePinchZoomEnabled(false)
, backgroundColorInsteadOfCheckerboard(false)
, showOverdrawInTracing(false)
, canUseLCDText(true)
, shouldClearRootRenderPass(true)
, useLinearFadeScrollbarAnimator(false)
, calculateTopControlsPosition(false)
, useCheapnessEstimator(false)
, minimumContentsScale(0.0625f)
, lowResContentsScaleFactor(0.125f)
, topControlsHeight(0.f)
, refreshRate(0)
, maxPartialTextureUpdates(std::numeric_limits<size_t>::max())
, numRasterThreads(1)
, defaultTileSize(gfx::Size(256, 256))
, maxUntiledLayerSize(gfx::Size(512, 512))
, minimumOcclusionTrackingSize(gfx::Size(160, 160))
{
// TODO(danakj): Move this to chromium when we don't go through the WebKit API anymore.
compositorFrameMessage = CommandLine::ForCurrentProcess()->HasSwitch(cc::switches::kEnableCompositorFrameMessage);
partialSwapEnabled = CommandLine::ForCurrentProcess()->HasSwitch(switches::kEnablePartialSwap);
backgroundColorInsteadOfCheckerboard = CommandLine::ForCurrentProcess()->HasSwitch(switches::kBackgroundColorInsteadOfCheckerboard);
showOverdrawInTracing = CommandLine::ForCurrentProcess()->HasSwitch(switches::kTraceOverdraw);
// TODO(alokp): Remove this hard-coded setting.
// Platforms that need to disable LCD text must explicitly set this value.
#if defined(OS_ANDROID)
canUseLCDText = false;
#endif
#if defined(OS_ANDROID)
// TODO(danakj): Move this out to the android code.
maxPartialTextureUpdates = 0;
#endif
#if defined(OS_ANDROID)
// TODO(danakj): Move this out to the android code.
useLinearFadeScrollbarAnimator = true;
#endif
initialDebugState.showPropertyChangedRects = CommandLine::ForCurrentProcess()->HasSwitch(cc::switches::kShowPropertyChangedRects);
initialDebugState.showSurfaceDamageRects = CommandLine::ForCurrentProcess()->HasSwitch(cc::switches::kShowSurfaceDamageRects);
initialDebugState.showScreenSpaceRects = CommandLine::ForCurrentProcess()->HasSwitch(cc::switches::kShowScreenSpaceRects);
initialDebugState.showReplicaScreenSpaceRects = CommandLine::ForCurrentProcess()->HasSwitch(cc::switches::kShowReplicaScreenSpaceRects);
initialDebugState.showOccludingRects = CommandLine::ForCurrentProcess()->HasSwitch(cc::switches::kShowOccludingRects);
initialDebugState.showNonOccludingRects = CommandLine::ForCurrentProcess()->HasSwitch(cc::switches::kShowNonOccludingRects);
if (CommandLine::ForCurrentProcess()->HasSwitch(cc::switches::kSlowDownRasterScaleFactor)) {
int scaleAsInt;
std::string value = CommandLine::ForCurrentProcess()->GetSwitchValueASCII(switches::kSlowDownRasterScaleFactor);
if (!base::StringToInt(value, &scaleAsInt))
LOG(ERROR) << "Failed to parse the slow down raster scale factor:" << value;
else
initialDebugState.slowDownRasterScaleFactor = scaleAsInt;
}
if (CommandLine::ForCurrentProcess()->HasSwitch(
switches::kNumRasterThreads)) {
const size_t kMaxRasterThreads = 64;
std::string num_raster_threads =
CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
switches::kNumRasterThreads);
int num_threads;
if (base::StringToInt(num_raster_threads, &num_threads) &&
num_threads > 0 && num_threads <= kMaxRasterThreads) {
numRasterThreads = num_threads;
} else {
LOG(WARNING) << "Bad number of raster threads: " <<
num_raster_threads;
}
}
}
LayerTreeSettings::~LayerTreeSettings()
{
}
} // namespace cc
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