DelayFPS 于 24/01/31 更新 此次更新对这个函数进行改动，其目的是解决多线程使用时引发的问题，并提高精度 同时将 HpSleep(delay); 改为 std::this_thread::sleep_for(std::chrono::milliseconds(delay)); 有助于

释放窗口内存

* @brief 获取滚动条内容长度 */

获取默认窗口图标

获取目标点集

Window has already passed the IsWindowNavFocusable()

This is only used in rare/specific situations to manufacture an ID out of nowhere. FIXME: Consider instead storing last non-zero ID + count of success

获取源点集

Closely mimics PathBezierToCasteljau() in imgui_draw.cpp

Those functions are designed to facilitate changing the underlying structures for ImFontAtlas to store an array of ImDrawListSharedData

FIXME: Code is duplicated with code above.

FIXME-OPT: This is not a fast query. Adding a BakedCount field in Font might allow to take a shortcut for the most common case.

Copy to texture, post-process and queue update for backend

Important! This assume by ImFontConfig::GlyphExcludeRanges[] is a SMALL ARRAY (e.g. <10 entries) Use "Input Glyphs Overlap Detection Tool" to display

Preload all glyph ranges for legacy backends. This may lead to multiple texture creation which might be a little slower than before.

Create a compact, baked "..." if it doesn't exist, by using the ".". This may seem overly complicated right now but the point is to exercise and impro

Setup main font loader for the atlas Every font source (ImFontConfig) will use this unless ImFontConfig::FontLoader specify a custom loader.

Load/identify special glyphs (note that this is called again for fonts with MergeMode)

This is essentially a free-list pattern, it may be nice to wrap it into a dedicated type.

Overwrite existing entry

Source buffer may be written to (used for in-place mods). Post-process hooks may eventually be added here.