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overlays: Check if a font actually contains the character

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This commit is contained in:
Megamouse 2025-11-16 12:17:12 +01:00
parent a6371ef5d3
commit 10f8a49e36
2 changed files with 55 additions and 20 deletions
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72
rpcs3/Emu/RSX/Overlays/overlay_fonts.cpp
View file

@ -159,25 +159,57 @@ namespace rsx
return result;
}
codepage* font::initialize_codepage(char32_t codepage_id)
codepage* font::initialize_codepage(char32_t c)
{
// Init glyph
const auto codepage_id = get_page_id(c);
const auto class_ = classify(codepage_id);
const auto fs_settings = get_glyph_files(class_);
// Attemt to load requested font
std::vector<u8> bytes;
std::string file_path;
std::vector<u8> fallback_bytes;
std::string fallback_file;
bool font_found = false;
const auto get_font = [&](const std::string& file_path) -> bool
{
// Read font
fs::file f(file_path);
f.read(bytes, f.size());
// Check if the character exists in the font
stbtt_fontinfo info;
stbtt_InitFont(&info, bytes.data(), stbtt_GetFontOffsetForIndex(bytes.data(), 0));
font_found = stbtt_FindGlyphIndex(&info, c) != 0;
if (!font_found)
{
if (fallback_bytes.empty())
{
// Save this font as a fallback so we don't get a segfault or exception
fallback_bytes = std::move(bytes);
fallback_file = file_path;
}
bytes.clear();
}
return font_found;
};
for (const auto& font_file : fs_settings.font_names)
{
if (fs::is_file(font_file))
{
// Check for absolute paths or fonts 'installed' to executable folder
file_path = font_file;
font_found = true;
break;
if (get_font(font_file))
{
break;
}
continue;
}
std::string extension;
@ -196,11 +228,13 @@ namespace rsx
for (const auto& font_dir : fs_settings.lookup_font_dirs)
{
file_path = font_dir + file_name;
const std::string file_path = font_dir + file_name;
if (fs::is_file(file_path))
{
font_found = true;
break;
if (get_font(file_path))
{
break;
}
}
}
@ -210,16 +244,15 @@ namespace rsx
}
}
// Read font
if (font_found)
if (!font_found)
{
fs::file f(file_path);
f.read(bytes, f.size());
}
else
{
rsx_log.error("Failed to initialize font '%s.ttf' on codepage %d", font_name, static_cast<u32>(codepage_id));
return nullptr;
if (fallback_bytes.empty())
{
fmt::throw_exception("Failed to initialize font for character 0x%x on codepage %d.", static_cast<u32>(c), static_cast<u32>(codepage_id));
}
rsx_log.error("Failed to initialize font for character 0x%x on codepage %d. Falling back to font '%s'", static_cast<u32>(c), static_cast<u32>(codepage_id), fallback_file);
bytes = std::move(fallback_bytes);
}
codepage_cache.page = nullptr;
@ -245,7 +278,8 @@ namespace rsx
if (!initialized)
return {};
const auto page_id = (c >> 8);
const auto page_id = get_page_id(c);
if (codepage_cache.codepage_id == page_id && codepage_cache.page) [[likely]]
{
return codepage_cache.page->get_char(c, x_advance, y_advance);
@ -266,7 +300,7 @@ namespace rsx
if (!codepage_cache.page) [[unlikely]]
{
codepage_cache.page = initialize_codepage(page_id);
codepage_cache.page = initialize_codepage(c);
}
return codepage_cache.page->get_char(c, x_advance, y_advance);

3
rpcs3/Emu/RSX/Overlays/overlay_fonts.h
View file

@ -64,9 +64,10 @@ namespace rsx
}
codepage_cache;
static char32_t get_page_id(char32_t c) { return c >> 8; }
static language_class classify(char32_t codepage_id);
glyph_load_setup get_glyph_files(language_class class_) const;
codepage* initialize_codepage(char32_t codepage_id);
codepage* initialize_codepage(char32_t c);
public:
font(std::string_view ttf_name, f32 size);