46 lines
1.8 KiB
C++
46 lines
1.8 KiB
C++
#pragma once
|
|
|
|
#include <map>
|
|
#include <string>
|
|
#include <utility>
|
|
|
|
#include <QByteArray>
|
|
#include <QPixmap>
|
|
#include <QString>
|
|
|
|
// Rasterizes and caches per-item icon SVGs (REQ-UI-ITEM-ICON). Item icons are
|
|
// self-contained, full-color SVGs loaded from a directory, one file per item type
|
|
// named after the item's id (e.g. "iron_ore.svg"). Shared by the recipe-selection
|
|
// dialog (REQ-UI-RECIPE-ICON) and the game world's belt/port item rendering so the
|
|
// rasterization is not duplicated.
|
|
//
|
|
// A missing icon file is not an error: hasIcon() returns false for it and the caller
|
|
// falls back (a colored square in the world, a name caption in the dialog).
|
|
class ItemIconCache
|
|
{
|
|
public:
|
|
// iconDir is the directory holding the "<item_id>.svg" icon files
|
|
// (typically "<configDir>/../icons/items").
|
|
explicit ItemIconCache(const QString& iconDir);
|
|
|
|
// True if an icon SVG file exists for the given item id. Loads the file's bytes
|
|
// on first query and remembers the result (including absence) so repeated calls
|
|
// are cheap.
|
|
bool hasIcon(const std::string& itemId);
|
|
|
|
// Returns the item's icon rasterized to a transparent sizePx*sizePx pixmap,
|
|
// cached per (item id, size) so it is rendered once and reused across frames and
|
|
// only re-rasterized when the target size changes (REQ-UI-ITEM-ICON). Returns a
|
|
// null pixmap if the item has no icon file (callers should gate on hasIcon()).
|
|
QPixmap getPixmap(const std::string& itemId, int sizePx);
|
|
|
|
private:
|
|
// Returns the raw SVG bytes for an item id, loading and caching them on first
|
|
// access. An absent file caches an empty QByteArray so it is not retried.
|
|
const QByteArray& getSvg(const std::string& itemId);
|
|
|
|
QString m_iconDir;
|
|
std::map<std::string, QByteArray> m_svgById;
|
|
std::map<std::pair<std::string, int>, QPixmap> m_pixmapCache;
|
|
};
|