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/*
* Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
* Copyright (C) 2015 Igalia S.L.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "BitmapTexturePool.h"
#if USE(TEXTURE_MAPPER)
namespace WebCore {
#if defined(BITMAP_TEXTURE_POOL_MAX_SIZE_IN_MB) && BITMAP_TEXTURE_POOL_MAX_SIZE_IN_MB > 0
static constexpr size_t poolSizeLimit = BITMAP_TEXTURE_POOL_MAX_SIZE_IN_MB * MB;
#else
static constexpr size_t poolSizeLimit = std::numeric_limits<size_t>::max();
#endif
static const Seconds releaseUnusedSecondsTolerance { 3_s };
static const Seconds releaseUnusedTexturesTimerInterval { 500_ms };
static const Seconds releaseUnusedSecondsToleranceOnLimitExceeded { 50_ms };
static const Seconds releaseUnusedTexturesTimerIntervalOnLimitExceeded { 200_ms };
BitmapTexturePool::BitmapTexturePool()
: m_releaseUnusedTexturesTimer(RunLoop::current(), this, &BitmapTexturePool::releaseUnusedTexturesTimerFired)
, m_releaseUnusedSecondsTolerance(releaseUnusedSecondsTolerance)
, m_releaseUnusedTexturesTimerInterval(releaseUnusedTexturesTimerInterval)
{
}
Ref<BitmapTexture> BitmapTexturePool::acquireTexture(const IntSize& size, OptionSet<BitmapTexture::Flags> flags)
{
Entry* selectedEntry = std::find_if(m_textures.begin(), m_textures.end(),
[&](Entry& entry) {
return entry.m_texture->refCount() == 1
&& entry.m_texture->size() == size
&& entry.m_texture->flags().contains(BitmapTexture::Flags::DepthBuffer) == flags.contains(BitmapTexture::Flags::DepthBuffer);
});
if (selectedEntry == m_textures.end()) {
m_textures.append(Entry(BitmapTexture::create(size, flags)));
selectedEntry = &m_textures.last();
m_poolSize += size.unclampedArea();
} else
selectedEntry->m_texture->reset(size, flags);
enterLimitExceededModeIfNeeded();
scheduleReleaseUnusedTextures();
selectedEntry->markIsInUse();
return selectedEntry->m_texture;
}
#if USE(GBM)
Ref<BitmapTexture> BitmapTexturePool::createTextureForImage(EGLImage image, OptionSet<BitmapTexture::Flags> flags)
{
auto texture = BitmapTexture::create(image, flags);
m_imageTextures.append(texture.copyRef());
scheduleReleaseUnusedTextures();
return texture;
}
#endif
void BitmapTexturePool::scheduleReleaseUnusedTextures()
{
if (m_releaseUnusedTexturesTimer.isActive())
return;
m_releaseUnusedTexturesTimer.startOneShot(m_releaseUnusedTexturesTimerInterval);
}
void BitmapTexturePool::releaseUnusedTexturesTimerFired()
{
if (!m_textures.isEmpty()) {
// Delete entries, which have been unused in releaseUnusedSecondsTolerance.
MonotonicTime minUsedTime = MonotonicTime::now() - m_releaseUnusedSecondsTolerance;
m_textures.removeAllMatching([this, &minUsedTime](const Entry& entry) {
if (entry.canBeReleased(minUsedTime)) {
m_poolSize -= entry.m_texture->size().unclampedArea();
return true;
}
return false;
});
exitLimitExceededModeIfNeeded();
}
#if USE(GBM)
if (!m_imageTextures.isEmpty()) {
m_imageTextures.removeAllMatching([](const BitmapTexture& texture) {
return texture.refCount() == 1;
});
}
if (!m_textures.isEmpty() && !m_imageTextures.isEmpty())
scheduleReleaseUnusedTextures();
#else
if (!m_textures.isEmpty())
scheduleReleaseUnusedTextures();
#endif
}
void BitmapTexturePool::enterLimitExceededModeIfNeeded()
{
if (m_onLimitExceededMode)
return;
if (m_poolSize > poolSizeLimit) {
// If we allocated a new texture and this caused that we went over the size limit, enter limit exceeded mode,
// set values for tolerance and interval for this mode, and trigger an immediate request to release textures.
// While on limit exceeded mode, we are more aggressive releasing textures, by polling more often and keeping
// the unused textures in the pool for smaller periods of time.
m_onLimitExceededMode = true;
m_releaseUnusedSecondsTolerance = releaseUnusedSecondsToleranceOnLimitExceeded;
m_releaseUnusedTexturesTimerInterval = releaseUnusedTexturesTimerIntervalOnLimitExceeded;
m_releaseUnusedTexturesTimer.startOneShot(0_s);
}
}
void BitmapTexturePool::exitLimitExceededModeIfNeeded()
{
if (!m_onLimitExceededMode)
return;
// If we're in limit exceeded mode and the pool size has become smaller than the limit,
// exit the limit exceeded mode and set the default values for interval and tolerance again.
if (m_poolSize <= poolSizeLimit) {
m_onLimitExceededMode = false;
m_releaseUnusedSecondsTolerance = releaseUnusedSecondsTolerance;
m_releaseUnusedTexturesTimerInterval = releaseUnusedTexturesTimerInterval;
}
}
} // namespace WebCore
#endif // USE(TEXTURE_MAPPER)
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