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Code Issues Activity Actions

FileManager: Add a very naive thumbnail generation thread.

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This is pretty rickety since we don't have any synchronization primitives.
This commit is contained in:
Andreas Kling 2019-03-24 02:59:09 +01:00
parent e7c1caa2b5
commit 812dc1e9ea
2 changed files with 35 additions and 4 deletions
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38
Applications/FileManager/DirectoryModel.cpp
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@ -9,8 +9,36 @@
#include <SharedGraphics/GraphicsBitmap.h>
#include <SharedGraphics/Painter.h>
static HashMap<String, RetainPtr<GraphicsBitmap>>& thumbnail_cache()
{
static HashMap<String, RetainPtr<GraphicsBitmap>>* s_map;
if (!s_map)
s_map = new HashMap<String, RetainPtr<GraphicsBitmap>>();
return *s_map;
}
int thumbnail_thread(void* model)
{
for (;;) {
sleep(1);
for (auto& it : thumbnail_cache()) {
if (it.value)
continue;
if (auto png_bitmap = GraphicsBitmap::load_from_file(it.key)) {
auto thumbnail = GraphicsBitmap::create(png_bitmap->format(), { 32, 32 });
Painter painter(*thumbnail);
painter.draw_scaled_bitmap(thumbnail->rect(), *png_bitmap, png_bitmap->rect());
it.value = move(thumbnail);
((DirectoryModel*)model)->did_update();
}
}
}
}
DirectoryModel::DirectoryModel()
{
create_thread(thumbnail_thread, this);
m_directory_icon = GraphicsBitmap::load_from_file("/res/icons/folder16.png");
m_file_icon = GraphicsBitmap::load_from_file("/res/icons/file16.png");
m_symlink_icon = GraphicsBitmap::load_from_file("/res/icons/link16.png");
@ -83,10 +111,12 @@ const GraphicsBitmap& DirectoryModel::icon_for(const Entry& entry) const
return *m_executable_icon;
if (entry.name.ends_with(".png")) {
if (!entry.thumbnail) {
if (auto png_bitmap = GraphicsBitmap::load_from_file(entry.full_path(*this))) {
entry.thumbnail = GraphicsBitmap::create(png_bitmap->format(), { 32, 32 });
Painter painter(*entry.thumbnail);
painter.draw_scaled_bitmap(entry.thumbnail->rect(), *png_bitmap, png_bitmap->rect());
auto path = entry.full_path(*this);
auto it = thumbnail_cache().find(path);
if (it != thumbnail_cache().end()) {
entry.thumbnail = (*it).value.copy_ref();
} else {
thumbnail_cache().set(path, nullptr);
}
}
if (!entry.thumbnail)