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/*
* Copyright (C) 2005-2018 Team Kodi
* This file is part of Kodi - https://kodi.tv
*
* SPDX-License-Identifier: GPL-2.0-or-later
* See LICENSES/README.md for more information.
*/
#include "GUIFontTTF.h"
#include "windowing/GraphicContext.h"
#include <stdint.h>
#include <vector>
using namespace std::chrono_literals;
namespace
{
constexpr auto FONT_CACHE_TIME_LIMIT = 1000ms;
}
template<class Position, class Value>
class CGUIFontCacheImpl
{
struct EntryList
{
using HashMap = std::multimap<size_t, std::unique_ptr<CGUIFontCacheEntry<Position, Value>>>;
using HashIter = typename HashMap::iterator;
using AgeMap = std::multimap<std::chrono::steady_clock::time_point, HashIter>;
~EntryList() { Flush(); }
HashIter Insert(size_t hash, std::unique_ptr<CGUIFontCacheEntry<Position, Value>> v)
{
auto r(hashMap.insert(typename HashMap::value_type(hash, std::move(v))));
if (r->second)
ageMap.insert(typename AgeMap::value_type(r->second->m_lastUsed, r));
return r;
}
void Flush()
{
ageMap.clear();
hashMap.clear();
}
typename HashMap::iterator FindKey(CGUIFontCacheKey<Position> key)
{
CGUIFontCacheHash<Position> hashGen;
CGUIFontCacheKeysMatch<Position> keyMatch;
auto range = hashMap.equal_range(hashGen(key));
for (auto ret = range.first; ret != range.second; ++ret)
{
if (keyMatch(ret->second->m_key, key))
{
return ret;
}
}
return hashMap.end();
}
void UpdateAge(HashIter it, std::chrono::steady_clock::time_point now)
{
auto range = ageMap.equal_range(it->second->m_lastUsed);
for (auto ageit = range.first; ageit != range.second; ++ageit)
{
if (ageit->second == it)
{
ageMap.erase(ageit);
ageMap.insert(typename AgeMap::value_type(now, it));
it->second->m_lastUsed = now;
return;
}
}
}
HashMap hashMap;
AgeMap ageMap;
};
EntryList m_list;
CGUIFontCache<Position, Value>* m_parent;
public:
explicit CGUIFontCacheImpl(CGUIFontCache<Position, Value>* parent) : m_parent(parent) {}
Value& Lookup(const CGraphicContext& context,
Position& pos,
const std::vector<UTILS::COLOR::Color>& colors,
const vecText& text,
uint32_t alignment,
float maxPixelWidth,
bool scrolling,
std::chrono::steady_clock::time_point now,
bool& dirtyCache);
void Flush();
};
template<class Position, class Value>
CGUIFontCacheEntry<Position, Value>::~CGUIFontCacheEntry()
{
delete &m_key.m_colors;
delete &m_key.m_text;
m_value.clear();
}
template<class Position, class Value>
void CGUIFontCacheEntry<Position, Value>::Assign(const CGUIFontCacheKey<Position>& key,
std::chrono::steady_clock::time_point now)
{
m_key.m_pos = key.m_pos;
m_key.m_colors.assign(key.m_colors.begin(), key.m_colors.end());
m_key.m_text.assign(key.m_text.begin(), key.m_text.end());
m_key.m_alignment = key.m_alignment;
m_key.m_maxPixelWidth = key.m_maxPixelWidth;
m_key.m_scrolling = key.m_scrolling;
m_matrix = key.m_matrix;
m_key.m_scaleX = key.m_scaleX;
m_key.m_scaleY = key.m_scaleY;
m_lastUsed = now;
m_value.clear();
}
template<class Position, class Value>
CGUIFontCache<Position, Value>::CGUIFontCache(CGUIFontTTF& font)
: m_impl(std::make_unique<CGUIFontCacheImpl<Position, Value>>(this)), m_font(font)
{
}
template<class Position, class Value>
CGUIFontCache<Position, Value>::~CGUIFontCache() = default;
template<class Position, class Value>
Value& CGUIFontCache<Position, Value>::Lookup(const CGraphicContext& context,
Position& pos,
const std::vector<UTILS::COLOR::Color>& colors,
const vecText& text,
uint32_t alignment,
float maxPixelWidth,
bool scrolling,
std::chrono::steady_clock::time_point now,
bool& dirtyCache)
{
if (!m_impl)
m_impl = std::make_unique<CGUIFontCacheImpl<Position, Value>>(this);
return m_impl->Lookup(context, pos, colors, text, alignment, maxPixelWidth, scrolling, now,
dirtyCache);
}
template<class Position, class Value>
Value& CGUIFontCacheImpl<Position, Value>::Lookup(const CGraphicContext& context,
Position& pos,
const std::vector<UTILS::COLOR::Color>& colors,
const vecText& text,
uint32_t alignment,
float maxPixelWidth,
bool scrolling,
std::chrono::steady_clock::time_point now,
bool& dirtyCache)
{
const CGUIFontCacheKey<Position> key(pos, const_cast<std::vector<UTILS::COLOR::Color>&>(colors),
const_cast<vecText&>(text), alignment, maxPixelWidth,
scrolling, context.GetGUIMatrix(), context.GetGUIScaleX(),
context.GetGUIScaleY());
auto i = m_list.FindKey(key);
if (i == m_list.hashMap.end())
{
// Cache miss
dirtyCache = true;
std::unique_ptr<CGUIFontCacheEntry<Position, Value>> entry;
if (!m_list.ageMap.empty())
{
const auto duration =
std::chrono::duration_cast<std::chrono::milliseconds>(now - m_list.ageMap.begin()->first);
if (duration > FONT_CACHE_TIME_LIMIT)
{
entry = std::move(m_list.ageMap.begin()->second->second);
m_list.hashMap.erase(m_list.ageMap.begin()->second);
m_list.ageMap.erase(m_list.ageMap.begin());
}
}
// add new entry
CGUIFontCacheHash<Position> hashgen;
if (!entry)
entry = std::make_unique<CGUIFontCacheEntry<Position, Value>>(*m_parent, key, now);
else
entry->Assign(key, now);
return m_list.Insert(hashgen(key), std::move(entry))->second->m_value;
}
else
{
// Cache hit
// Update the translation arguments so that they hold the offset to apply
// to the cached values (but only in the dynamic case)
pos.UpdateWithOffsets(i->second->m_key.m_pos, scrolling);
// Update time in entry and move to the back of the list
m_list.UpdateAge(i, now);
dirtyCache = false;
return i->second->m_value;
}
}
template<class Position, class Value>
void CGUIFontCache<Position, Value>::Flush()
{
m_impl->Flush();
}
template<class Position, class Value>
void CGUIFontCacheImpl<Position, Value>::Flush()
{
m_list.Flush();
}
template CGUIFontCache<CGUIFontCacheStaticPosition, CGUIFontCacheStaticValue>::CGUIFontCache(
CGUIFontTTF& font);
template CGUIFontCache<CGUIFontCacheStaticPosition, CGUIFontCacheStaticValue>::~CGUIFontCache();
template CGUIFontCacheEntry<CGUIFontCacheStaticPosition,
CGUIFontCacheStaticValue>::~CGUIFontCacheEntry();
template CGUIFontCacheStaticValue& CGUIFontCache<
CGUIFontCacheStaticPosition,
CGUIFontCacheStaticValue>::Lookup(const CGraphicContext& context,
CGUIFontCacheStaticPosition&,
const std::vector<UTILS::COLOR::Color>&,
const vecText&,
uint32_t,
float,
bool,
std::chrono::steady_clock::time_point,
bool&);
template void CGUIFontCache<CGUIFontCacheStaticPosition, CGUIFontCacheStaticValue>::Flush();
template CGUIFontCache<CGUIFontCacheDynamicPosition, CGUIFontCacheDynamicValue>::CGUIFontCache(
CGUIFontTTF& font);
template CGUIFontCache<CGUIFontCacheDynamicPosition, CGUIFontCacheDynamicValue>::~CGUIFontCache();
template CGUIFontCacheEntry<CGUIFontCacheDynamicPosition,
CGUIFontCacheDynamicValue>::~CGUIFontCacheEntry();
template CGUIFontCacheDynamicValue& CGUIFontCache<
CGUIFontCacheDynamicPosition,
CGUIFontCacheDynamicValue>::Lookup(const CGraphicContext& context,
CGUIFontCacheDynamicPosition&,
const std::vector<UTILS::COLOR::Color>&,
const vecText&,
uint32_t,
float,
bool,
std::chrono::steady_clock::time_point,
bool&);
template void CGUIFontCache<CGUIFontCacheDynamicPosition, CGUIFontCacheDynamicValue>::Flush();
void CVertexBuffer::clear()
{
if (m_font)
m_font->DestroyVertexBuffer(*this);
}
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