void DirectoryMangaVolume::prefetch() {
int theoretical_min = prefetchMin();
int theoretical_max = prefetchMax();
theoretical_max = std::max(theoretical_min+1,theoretical_max);
//qWarning() << theoretical_min << " " << theoretical_max;
//clear out pages that aren't necessary anymore
while(m_prefetched_pages.size() > 0 &&
m_prefetched_pages.cbegin()->first < theoretical_min) {
//qWarning() << "front unprefetched: " << m_prefetched_pages.begin()->first;
m_prefetched_pages.erase(m_prefetched_pages.begin());
}
while(m_prefetched_pages.size() > 0 &&
m_prefetched_pages.crbegin()->first > theoretical_max) {
//qWarning() << "back unprefetched: " << m_prefetched_pages.crbegin()->first;
//qWarning() << m_prefetched_pages.crbegin()->second.getFilename();
m_prefetched_pages.erase(--(m_prefetched_pages.crbegin().base()));
}
//if empty fill it in
if( m_prefetched_pages.size() == 0) {
for(int i=theoretical_min; i < theoretical_max; ++i) {
m_prefetched_pages[i] = MangaPage(m_page_names[i]);
}
}
//else fill in the front and back
if(theoretical_min < m_prefetched_pages.cbegin()->first) {
int endPos = m_prefetched_pages.cbegin()->first;
for(int i=theoretical_min; i < endPos; ++i) {
//qWarning() << "font prefetched: " << i;
m_prefetched_pages[i] = MangaPage(m_page_names[i]);
}
}
if(theoretical_max > m_prefetched_pages.crbegin()->first) {
int startPos = m_prefetched_pages.crbegin()->first+1;
for(int i=startPos; i < theoretical_max; ++i) {
//qWarning() << "back prefetched: " << i;
m_prefetched_pages[i] = MangaPage(m_page_names[i]);
}
}
}
std::shared_ptr<const QImage> DirectoryMangaVolume::getImage(uint page_num, QPointF) {
if (page_num >= m_page_names.size()) {
return std::shared_ptr<const QImage>();
} else if(m_prefetch_width <= 0) {
return MangaPage(m_page_names[page_num]).getData();
} else {
m_active_pages.insert(page_num);
prefetch();
return m_prefetched_pages[page_num].getData();
}
}
void DirectoryMangaVolume::prefetch() {
int theoretical_min = prefetchMin();
int theoretical_max = prefetchMax();
theoretical_max = std::max(theoretical_min+1,theoretical_max);
qWarning() << theoretical_min << " " << theoretical_max;
if( m_prefetched_pages.size() == 0) {
for(int i=theoretical_min; i < theoretical_max; ++i) {
m_prefetched_pages[i] = MangaPage(m_page_names[i]);
}
}
if(theoretical_min < m_prefetched_pages.cbegin()->first) {
int endPos = m_prefetched_pages.cbegin()->first;
for(int i=theoretical_min; i < endPos; ++i) {
qWarning() << "font prefetched: " << i;
m_prefetched_pages[i] = MangaPage(m_page_names[i]);
}
} else {
while(m_prefetched_pages.cbegin()->first < theoretical_min) {
qWarning() << "front unprefetched: " << m_prefetched_pages.begin()->first;
m_prefetched_pages.erase(m_prefetched_pages.begin());
}
}
if(theoretical_max > m_prefetched_pages.crbegin()->first) {
int startPos = m_prefetched_pages.crbegin()->first+1;
for(int i=startPos; i < theoretical_max; ++i) {
qWarning() << "back prefetched: " << i;
m_prefetched_pages[i] = MangaPage(m_page_names[i]);
}
} else {
while(m_prefetched_pages.crbegin()->first > theoretical_max) {
qWarning() << "back unprefetched: " << m_prefetched_pages.crbegin()->first;
qWarning() << m_prefetched_pages.crbegin()->second.getFilename();
m_prefetched_pages.erase(--(m_prefetched_pages.crbegin().base()));
}
}
}