BitmapTexturePool.cpp [plain text]
#include "config.h"
#include "BitmapTexturePool.h"
#if USE(TEXTURE_MAPPER_GL)
#include "BitmapTextureGL.h"
#endif
namespace WebCore {
static const double releaseUnusedSecondsTolerance = 3;
static const Seconds releaseUnusedTexturesTimerInterval { 500_ms };
#if USE(TEXTURE_MAPPER_GL)
BitmapTexturePool::BitmapTexturePool(const TextureMapperContextAttributes& contextAttributes)
: m_contextAttributes(contextAttributes)
, m_releaseUnusedTexturesTimer(RunLoop::current(), this, &BitmapTexturePool::releaseUnusedTexturesTimerFired)
{
}
#endif
RefPtr<BitmapTexture> BitmapTexturePool::acquireTexture(const IntSize& size, const BitmapTexture::Flags flags)
{
Vector<Entry>& list = flags & BitmapTexture::FBOAttachment ? m_attachmentTextures : m_textures;
Entry* selectedEntry = std::find_if(list.begin(), list.end(),
[&size](Entry& entry) { return entry.m_texture->refCount() == 1 && entry.m_texture->size() == size; });
if (selectedEntry == list.end()) {
list.append(Entry(createTexture(flags)));
selectedEntry = &list.last();
}
scheduleReleaseUnusedTextures();
selectedEntry->markIsInUse();
return selectedEntry->m_texture.copyRef();
}
void BitmapTexturePool::scheduleReleaseUnusedTextures()
{
if (m_releaseUnusedTexturesTimer.isActive())
return;
m_releaseUnusedTexturesTimer.startOneShot(releaseUnusedTexturesTimerInterval);
}
void BitmapTexturePool::releaseUnusedTexturesTimerFired()
{
double minUsedTime = monotonicallyIncreasingTime() - releaseUnusedSecondsTolerance;
if (!m_textures.isEmpty()) {
m_textures.removeAllMatching([&minUsedTime](const Entry& entry) {
return entry.canBeReleased(minUsedTime);
});
}
if (!m_attachmentTextures.isEmpty()) {
m_attachmentTextures.removeAllMatching([&minUsedTime](const Entry& entry) {
return entry.canBeReleased(minUsedTime);
});
}
if (!m_textures.isEmpty() || !m_attachmentTextures.isEmpty())
scheduleReleaseUnusedTextures();
}
RefPtr<BitmapTexture> BitmapTexturePool::createTexture(const BitmapTexture::Flags flags)
{
#if USE(TEXTURE_MAPPER_GL)
return BitmapTextureGL::create(m_contextAttributes, flags);
#else
UNUSED_PARAM(flags);
return nullptr;
#endif
}
}