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/*
* Copyright (C) 2022 Apple Inc. All rights reserved.
*
* 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. ``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
* 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 "GlyphDisplayListCache.h"
#include "DisplayListItems.h"
#include "DisplayListIterator.h"
namespace WebCore {
static bool canShareDisplayListWithItem(DisplayList::ItemType itemType)
{
using DisplayList::ItemType;
switch (itemType) {
case ItemType::Translate:
case ItemType::Scale:
case ItemType::ConcatenateCTM:
case ItemType::DrawDecomposedGlyphs:
case ItemType::DrawImageBuffer:
case ItemType::DrawNativeImage:
case ItemType::BeginTransparencyLayer:
case ItemType::EndTransparencyLayer:
return true;
case ItemType::Save:
case ItemType::Restore:
case ItemType::Rotate:
case ItemType::SetCTM:
case ItemType::SetInlineFillColor:
case ItemType::SetInlineStrokeColor:
case ItemType::SetStrokeThickness:
case ItemType::SetState:
case ItemType::SetLineCap:
case ItemType::SetLineDash:
case ItemType::SetLineJoin:
case ItemType::SetMiterLimit:
case ItemType::ClearShadow:
case ItemType::Clip:
case ItemType::ClipRoundedRect:
case ItemType::ClipOut:
case ItemType::ClipOutRoundedRect:
case ItemType::ClipToImageBuffer:
case ItemType::ClipOutToPath:
case ItemType::ClipPath:
case ItemType::ResetClip:
case ItemType::DrawControlPart:
case ItemType::DrawFilteredImageBuffer:
case ItemType::DrawSystemImage:
case ItemType::DrawGlyphs:
case ItemType::DrawPattern:
case ItemType::DrawRect:
case ItemType::DrawLine:
case ItemType::DrawLinesForText:
case ItemType::DrawDotsForDocumentMarker:
case ItemType::DrawEllipse:
case ItemType::DrawPath:
case ItemType::DrawFocusRingPath:
case ItemType::DrawFocusRingRects:
case ItemType::FillRect:
case ItemType::FillRectWithColor:
case ItemType::FillRectWithGradient:
case ItemType::FillCompositedRect:
case ItemType::FillRoundedRect:
case ItemType::FillRectWithRoundedHole:
#if ENABLE(INLINE_PATH_DATA)
case ItemType::FillLine:
case ItemType::FillArc:
case ItemType::FillQuadCurve:
case ItemType::FillBezierCurve:
#endif
case ItemType::FillPathSegment:
case ItemType::FillPath:
case ItemType::FillEllipse:
#if ENABLE(VIDEO)
case ItemType::PaintFrameForMedia:
#endif
case ItemType::StrokeRect:
case ItemType::StrokeLine:
#if ENABLE(INLINE_PATH_DATA)
case ItemType::StrokeArc:
case ItemType::StrokeQuadCurve:
case ItemType::StrokeBezierCurve:
#endif
case ItemType::StrokePathSegment:
case ItemType::StrokePath:
case ItemType::StrokeEllipse:
case ItemType::ClearRect:
#if USE(CG)
case ItemType::ApplyStrokePattern:
case ItemType::ApplyFillPattern:
#endif
case ItemType::ApplyDeviceScaleFactor:
return false;
}
ASSERT_NOT_REACHED();
return false;
}
struct GlyphDisplayListCacheKey {
const TextRun& textRun;
const FontCascade& font;
GraphicsContext& context;
};
static void add(Hasher& hasher, const GlyphDisplayListCacheKey& key)
{
add(hasher, key.textRun, key.context.scaleFactor().width(), key.context.scaleFactor().height(), key.font.generation(), key.context.shouldSubpixelQuantizeFonts());
}
struct GlyphDisplayListCacheKeyTranslator {
static unsigned hash(const GlyphDisplayListCacheKey& key)
{
return computeHash(key);
}
static bool equal(GlyphDisplayListCacheEntry* entry, const GlyphDisplayListCacheKey& key)
{
return entry->m_textRun == key.textRun
&& entry->m_scaleFactor == key.context.scaleFactor()
&& entry->m_fontCascadeGeneration == key.font.generation()
&& entry->m_shouldSubpixelQuantizeFont == key.context.shouldSubpixelQuantizeFonts();
}
};
GlyphDisplayListCache& GlyphDisplayListCache::singleton()
{
static NeverDestroyed<GlyphDisplayListCache> cache;
return cache;
}
void GlyphDisplayListCache::clear()
{
m_entriesForLayoutRun.clear();
m_entries.clear();
}
unsigned GlyphDisplayListCache::size() const
{
return m_entries.size();
}
size_t GlyphDisplayListCache::sizeInBytes() const
{
size_t sizeInBytes = 0;
for (auto entry : m_entries)
sizeInBytes += entry->displayList().sizeInBytes();
return sizeInBytes;
}
DisplayList::DisplayList* GlyphDisplayListCache::get(const void* run, const FontCascade& font, GraphicsContext& context, const TextRun& textRun)
{
if (MemoryPressureHandler::singleton().isUnderMemoryPressure()) {
if (!m_entries.isEmpty()) {
LOG(MemoryPressure, "GlyphDisplayListCache::%s - Under memory pressure - size: %d - sizeInBytes: %ld", __FUNCTION__, size(), sizeInBytes());
clear();
}
return nullptr;
}
if (font.isLoadingCustomFonts() || !font.fonts())
return nullptr;
if (auto entry = m_entriesForLayoutRun.get(run))
return &entry->displayList();
if (auto entry = m_entries.find<GlyphDisplayListCacheKeyTranslator>(GlyphDisplayListCacheKey { textRun, font, context }); entry != m_entries.end())
return &m_entriesForLayoutRun.add(run, Ref { **entry }).iterator->value->displayList();
if (auto displayList = font.displayListForTextRun(context, textRun)) {
auto entry = GlyphDisplayListCacheEntry::create(WTFMove(displayList), textRun, font, context);
if (canShareDisplayList(entry->displayList()))
m_entries.add(entry.ptr());
return &m_entriesForLayoutRun.add(run, WTFMove(entry)).iterator->value->displayList();
}
return nullptr;
}
DisplayList::DisplayList* GlyphDisplayListCache::getIfExists(const void* run)
{
if (auto entry = m_entriesForLayoutRun.get(run))
return &entry->displayList();
return nullptr;
}
void GlyphDisplayListCache::remove(const void* run)
{
m_entriesForLayoutRun.remove(run);
}
bool GlyphDisplayListCache::canShareDisplayList(const DisplayList::InMemoryDisplayList& displayList)
{
for (auto displayListItem : displayList) {
if (!canShareDisplayListWithItem(displayListItem.value().item.type()))
return false;
}
return true;
}
GlyphDisplayListCacheEntry::~GlyphDisplayListCacheEntry()
{
GlyphDisplayListCache::singleton().m_entries.remove(this);
}
} // namespace WebCore
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