otomatalabs/furnace
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GUI: add a compressed font cache

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reduce memory usage by not loading the same font twice
This commit is contained in:
tildearrow 2025-09-07 18:13:57 -05:00
parent c75f363453
commit fb35e6f993
2 changed files with 29 additions and 3 deletions
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19
src/gui/fontzlib.cpp
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@ -38,9 +38,21 @@ struct InflateBlock {
};
ImFont* FurnaceGUI::addFontZlib(const void* data, size_t len, float size_pixels, const ImFontConfig* font_cfg, const ImWchar* glyph_ranges) {
// find font in cache
logV("addFontZlib...");
for (FurnaceGUIUncompFont& i: fontCache) {
if (i.origPtr==data && i.origLen==len) {
logV("found in cache");
ImFontConfig fontConfig=(font_cfg==NULL)?ImFontConfig():(*font_cfg);
fontConfig.FontDataOwnedByAtlas=false;
return ImGui::GetIO().Fonts->AddFontFromMemoryTTF(i.data,i.len,size_pixels,&fontConfig,glyph_ranges);
}
}
z_stream zl;
memset(&zl,0,sizeof(z_stream));
logV("addFontZlib...");
logV("not found in cache - decompressing...");
zl.avail_in=len;
zl.next_in=(Bytef*)data;
@ -116,10 +128,11 @@ ImFont* FurnaceGUI::addFontZlib(const void* data, size_t len, float size_pixels,
delete i;
}
blocks.clear();
len=finalSize;
fontCache.push_back(FurnaceGUIUncompFont(data,len,finalData,finalSize));
ImFontConfig fontConfig=(font_cfg==NULL)?ImFontConfig():(*font_cfg);
fontConfig.FontDataOwnedByAtlas=true;
fontConfig.FontDataOwnedByAtlas=false;
return ImGui::GetIO().Fonts->AddFontFromMemoryTTF(finalData,finalSize,size_pixels,&fontConfig,glyph_ranges);
}