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maybe slightly better image loading maybe hopefully

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This commit is contained in:
ouwou
2020-10-03 18:49:22 -04:00
parent c7a958a3bb
commit bbe36a8246
7 changed files with 105 additions and 66 deletions
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52
imgmanager.cpp
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@@ -1,44 +1,68 @@
#include "imgmanager.hpp"
#include "util.hpp"
ImageManager::ImageManager() {
m_cb_dispatcher.connect(sigc::mem_fun(*this, &ImageManager::RunCallbacks));
}
Cache &ImageManager::GetCache() {
return m_cache;
}
void ImageManager::LoadFromURL(std::string url, std::function<void(Glib::RefPtr<Gdk::Pixbuf>)> cb) {
/*if (m_pixs.find(url) != m_pixs.end()) {
cb(m_pixs.at(url));
return;
}*/
Glib::RefPtr<Gdk::Pixbuf> ImageManager::ReadFileToPixbuf(std::string path) {
const auto &data = ReadWholeFile(path);
if (data.size() == 0) return Glib::RefPtr<Gdk::Pixbuf>(nullptr);
auto loader = Gdk::PixbufLoader::create();
loader->signal_size_prepared().connect([&loader](int w, int h) {
int cw, ch;
GetImageDimensions(w, h, cw, ch); // what could go wrong
loader->set_size(cw, ch);
});
loader->write(static_cast<const guint8 *>(data.data()), data.size());
loader->close();
auto buf = loader->get_pixbuf();
return buf;
}
void ImageManager::LoadFromURL(std::string url, callback_type cb) {
m_cache.GetFileFromURL(url, [this, url, cb](std::string path) {
try {
auto buf = Gdk::Pixbuf::create_from_file(path);
//m_pixs[url] = buf;
cb(buf);
auto buf = ReadFileToPixbuf(path);
m_cb_mutex.lock();
m_cb_queue.push(std::make_pair(buf, cb));
m_cb_dispatcher.emit();
m_cb_mutex.unlock();
} catch (std::exception &e) {
fprintf(stderr, "err loading pixbuf from %s: %s\n", path.c_str(), e.what());
}
});
}
void ImageManager::RunCallbacks() {
m_cb_mutex.lock();
const auto &pair = m_cb_queue.front();
pair.second(pair.first);
m_cb_queue.pop();
m_cb_mutex.unlock();
}
Glib::RefPtr<Gdk::Pixbuf> ImageManager::GetFromURLIfCached(std::string url) {
std::string path = m_cache.GetPathIfCached(url);
if (path != "")
return Gdk::Pixbuf::create_from_file(path);
//if (m_pixs.find(url) != m_pixs.end())
// return m_pixs.at(url);
return ReadFileToPixbuf(path);
return Glib::RefPtr<Gdk::Pixbuf>(nullptr);
}
Glib::RefPtr<Gdk::Pixbuf> ImageManager::GetPlaceholder(int size) {
std::string name = "/placeholder" + std::to_string(size);
//if (m_pixs.find(name) != m_pixs.end())
// return m_pixs.at(name);
if (m_pixs.find(name) != m_pixs.end())
return m_pixs.at(name);
try {
auto buf = Gdk::Pixbuf::create_from_file("res/decamarks.png", size, size);
// m_pixs[name] = buf;
m_pixs[name] = buf;
return buf;
} catch (std::exception &e) {
fprintf(stderr, "error loading placeholder\n");