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Misc: Optimized storage of window settings data (reducing allocation count).

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This commit is contained in:
omar 2019-11-05 22:43:53 +01:00
parent 3929255b77
commit 4c13807b7d
3 changed files with 12 additions and 7 deletions
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1
docs/CHANGELOG.txt
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@ -68,6 +68,7 @@ Other Changes:
incorrectly locating the arrow hit position to the left of the frame. (#2451, #2438, #1897)
- DragScalar, SliderScalar, InputScalar: Added p_ prefix to parameter that are pointers to the data
to clarify how they are used, and more comments redirecting to the demo code. (#2844)
- Misc: Optimized storage of window settings data (reducing allocation count).
- Misc: Windows: Do not use _wfopen() if IMGUI_DISABLE_WIN32_FUNCTIONS is defined. (#2815)
- Docs: Improved and moved FAQ to docs/FAQ.md so it can be readable on the web. [@ButternCream, @ocornut]
- Docs: Added permanent redirect from https://www.dearimgui.org/faq to FAQ page.

12
imgui.cpp
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@ -3809,8 +3809,7 @@ void ImGui::Shutdown(ImGuiContext* context)
g.PrivateClipboard.clear();
g.InputTextState.ClearFreeMemory();
for (int i = 0; i < g.SettingsWindows.Size; i++)
IM_DELETE(g.SettingsWindows[i].Name);
g.SettingsWindowsNames.clear();
g.SettingsWindows.clear();
g.SettingsHandlers.clear();
@ -9205,8 +9204,10 @@ ImGuiWindowSettings* ImGui::CreateNewWindowSettings(const char* name)
if (const char* p = strstr(name, "###"))
name = p;
#endif
settings->Name = ImStrdup(name);
settings->ID = ImHashStr(name);
size_t name_len = strlen(name);
settings->NameOffset = g.SettingsWindowsNames.size();
g.SettingsWindowsNames.append(name, name + name_len + 1); // Append with zero terminator
settings->ID = ImHashStr(name, name_len);
return settings;
}
@ -9387,7 +9388,8 @@ static void SettingsHandlerWindow_WriteAll(ImGuiContext* ctx, ImGuiSettingsHandl
for (int i = 0; i != g.SettingsWindows.Size; i++)
{
const ImGuiWindowSettings* settings = &g.SettingsWindows[i];
buf->appendf("[%s][%s]\n", handler->TypeName, settings->Name);
const char* settings_name = g.SettingsWindowsNames.c_str() + settings->NameOffset;
buf->appendf("[%s][%s]\n", handler->TypeName, settings_name);
buf->appendf("Pos=%d,%d\n", settings->Pos.x, settings->Pos.y);
buf->appendf("Size=%d,%d\n", settings->Size.x, settings->Size.y);
buf->appendf("Collapsed=%d\n", settings->Collapsed);

6
imgui_internal.h
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@ -662,15 +662,16 @@ struct IMGUI_API ImGuiInputTextState
};
// Windows data saved in imgui.ini file
// Because we never destroy or rename ImGuiWindowSettings, we can store the names in a separate buffer easily.
struct ImGuiWindowSettings
{
char* Name;
int NameOffset; // Offset into SettingsWindowNames[]
ImGuiID ID;
ImVec2ih Pos;
ImVec2ih Size;
bool Collapsed;
ImGuiWindowSettings() { Name = NULL; ID = 0; Pos = Size = ImVec2ih(0, 0); Collapsed = false; }
ImGuiWindowSettings() { NameOffset = -1; ID = 0; Pos = Size = ImVec2ih(0, 0); Collapsed = false; }
};
struct ImGuiSettingsHandler
@ -1039,6 +1040,7 @@ struct ImGuiContext
ImGuiTextBuffer SettingsIniData; // In memory .ini settings
ImVector<ImGuiSettingsHandler> SettingsHandlers; // List of .ini settings handlers
ImVector<ImGuiWindowSettings> SettingsWindows; // ImGuiWindow .ini settings entries (parsed from the last loaded .ini file and maintained on saving)
ImGuiTextBuffer SettingsWindowsNames; // Names for SettingsWindows
// Logging
bool LogEnabled;