libFont: ship Noto Sans as the fallback font (#1917)

* cmake: download Noto Sans at configure time

Fetch the hinted Regular, Bold, Italic and Bold Italic of Noto Sans
v2.015 and their licence from the Noto project's font distribution
(notofonts.github.io) with FetchContent, like the other third-party
dependencies. The commit and each file's SHA-256 are pinned in
variables.

Only these four styles are needed, so they are fetched individually
instead of through the release archive (117 MB, every style and build).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* cmake: ship Noto Sans beside the emulator

Copy the downloaded fonts to assets/fonts next to kyty_emulator on every
build, like the touch cursors and the trophy sound, and install them
there with the SIL Open Font License under licenses/noto-sans.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* libFont: fall back to the shipped Noto Sans instead of Tracy's Roboto

Fonts stb_truetype cannot read, including every system font set opened
with sceFontOpenFontSet, used Roboto from Tracy's source folder, found
relative to the source tree or the working directory. Installed builds
have neither, so their system fonts drew every character as '?'.

Load Noto Sans Regular, Bold, Italic or Bold Italic from assets/fonts
next to the emulator instead, and log when a file is missing.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* libFont: fetch Noto Sans with file(DOWNLOAD) and drop the style substitution

---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: nmzik <Nmzik@mail.ru>

3rdparty/CMakeLists.txt

@@ -42,6 +42,28 @@ if(NOT KYTY_CLANG_CL)
 endif()
 install(FILES "${openxr_SOURCE_DIR}/LICENSE" DESTINATION "licenses/openxr")
 
+# Noto Sans v2.015 (SIL Open Font License 1.1) is libFont's fallback font.
+set(KYTY_NOTO_SANS_REPOSITORY "https://raw.githubusercontent.com/notofonts/notofonts.github.io")
+set(KYTY_NOTO_SANS_COMMIT 42af67ccd12bc0e31ed85384bf73e39248265374)
+set(KYTY_NOTO_SANS_BASE_URL "${KYTY_NOTO_SANS_REPOSITORY}/${KYTY_NOTO_SANS_COMMIT}/fonts")
+set(KYTY_NOTO_SANS_DIR "${FETCHCONTENT_BASE_DIR}/noto-sans")
+function(kyty_fetch_noto_sans path sha256)
+	get_filename_component(name "${path}" NAME)
+	file(DOWNLOAD "${KYTY_NOTO_SANS_BASE_URL}/${path}" "${KYTY_NOTO_SANS_DIR}/${name}"
+		EXPECTED_HASH SHA256=${sha256})
+endfunction()
+kyty_fetch_noto_sans(LICENSE f2095b08bed08b23a6fe26112fcd679a2bee3f002eef077eb05d215ed1051bd8)
+kyty_fetch_noto_sans(NotoSans/hinted/ttf/NotoSans-Regular.ttf
+	478c558ea716033cd60c03438f628dfa75694dcf6b5f6d505a2f05fd2b4f3823)
+kyty_fetch_noto_sans(NotoSans/hinted/ttf/NotoSans-Bold.ttf
+	1df075a380fc7cb898acf64c1f7b3b4dd780de3caa860178bf929de35817a913)
+kyty_fetch_noto_sans(NotoSans/hinted/ttf/NotoSans-Italic.ttf
+	467e3f89eeca4108bb8710a2b9e0cf2281ac56d5b0609211a83776d0505eecb5)
+kyty_fetch_noto_sans(NotoSans/hinted/ttf/NotoSans-BoldItalic.ttf
+	1b602a9d6353be42c91df097a4857b69fa2696f26703d7a33b54a15d87c2622c)
+install(FILES "${KYTY_NOTO_SANS_DIR}/LICENSE" DESTINATION "licenses/noto-sans")
+set(KYTY_NOTO_SANS_DIR "${KYTY_NOTO_SANS_DIR}" PARENT_SCOPE)
+
 # The guest instruction patcher needs a decoder/encoder and a small
 # trampoline assembler. Pin the same revisions used by shadPS4's implementation.
 set(XBYAK_BUILD_TESTS OFF CACHE BOOL "" FORCE)

CMakeLists.txt

@@ -815,6 +815,19 @@ add_custom_target(kyty_touch_cursors
 add_dependencies(kyty_emulator kyty_touch_cursors)
 install(DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/assets/cursors" DESTINATION assets)
 
+set(KYTY_NOTO_SANS_FONTS
+	"${KYTY_NOTO_SANS_DIR}/NotoSans-Regular.ttf"
+	"${KYTY_NOTO_SANS_DIR}/NotoSans-Bold.ttf"
+	"${KYTY_NOTO_SANS_DIR}/NotoSans-Italic.ttf"
+	"${KYTY_NOTO_SANS_DIR}/NotoSans-BoldItalic.ttf")
+add_custom_target(kyty_noto_sans_fonts
+	COMMAND ${CMAKE_COMMAND} -E make_directory "$<TARGET_FILE_DIR:kyty_emulator>/assets/fonts"
+	COMMAND ${CMAKE_COMMAND} -E copy_if_different ${KYTY_NOTO_SANS_FONTS}
+		"$<TARGET_FILE_DIR:kyty_emulator>/assets/fonts"
+	VERBATIM)
+add_dependencies(kyty_emulator kyty_noto_sans_fonts)
+install(FILES ${KYTY_NOTO_SANS_FONTS} DESTINATION assets/fonts)
+
 target_link_libraries(kyty_emulator ${kyty_emulator_link_libraries})
 if (WIN32)
 	target_link_libraries(kyty_emulator opengl32)

src/launcher/CMakeLists.txt

@@ -125,6 +125,7 @@ if(APPLE)
 	install(TARGETS kyty_emulator DESTINATION "KytyPS5.app/Contents/MacOS")
 	install(TARGETS kyty_updater DESTINATION "KytyPS5.app/Contents/MacOS")
 	install(FILES "${KYTY_TROPHY_UNLOCK_SOUND}" DESTINATION "KytyPS5.app/Contents/Resources/assets/sounds")
+	install(FILES ${KYTY_NOTO_SANS_FONTS} DESTINATION "KytyPS5.app/Contents/Resources/assets/fonts")
 	install(DIRECTORY "${CMAKE_SOURCE_DIR}/assets/cursors" DESTINATION "KytyPS5.app/Contents/Resources/assets")
 	# Deploy and ad-hoc sign the Qt frameworks and plugins in the bundle.
 	find_program(KYTY_MACDEPLOYQT NAMES macdeployqt PATHS "${Qt6_DIR}/../../../bin" NO_DEFAULT_PATH)

src/libs/libFont.cpp

@@ -2,10 +2,12 @@
 #include "common/assert.h"
 #include "common/common.h"
 #include "common/logging/log.h"
+#include "common/stringUtils.h"
 #include "libs/errno.h"
 #include "libs/libs.h"
 #include "loader/symbolDatabase.h"
 
+#include <SDL3/SDL.h>
 #include <algorithm>
 #include <array>
 #include <cinttypes>
@@ -675,19 +677,6 @@ static bool font_is_italic(const FontState* font) {
 	       font->render_effect_slant != 0.0f;
 }
 
-static const char* fallback_font_file_name(bool bold, bool italic) {
-	if (bold && italic) {
-		return "Roboto-BoldItalic.ttf";
-	}
-	if (bold) {
-		return "Roboto-Bold.ttf";
-	}
-	if (italic) {
-		return "Roboto-Italic.ttf";
-	}
-	return "Roboto-Regular.ttf";
-}
-
 static std::vector<uint8_t> read_file_bytes(const std::filesystem::path& path) {
 	std::ifstream file(path, std::ios::binary | std::ios::ate);
 	if (!file) {
@@ -709,49 +698,34 @@ static std::vector<uint8_t> read_file_bytes(const std::filesystem::path& path) {
 	return data;
 }
 
-static std::vector<std::filesystem::path> fallback_font_candidates(const char* file_name) {
-	const auto rel =
-	    std::filesystem::path("3rdparty") / "tracy" / "profiler" / "src" / "font" / file_name;
-	std::vector<std::filesystem::path> paths;
-
-	auto source_root = std::filesystem::path(__FILE__).parent_path().parent_path().parent_path();
-	paths.push_back(source_root / rel);
-
-	std::error_code ec;
-	auto            cwd = std::filesystem::current_path(ec);
-	if (!ec) {
-		paths.push_back(cwd / rel);
-		paths.push_back(cwd / ".." / rel);
-		paths.push_back(cwd / ".." / ".." / rel);
+static std::vector<uint8_t> load_fallback_font_data(const char* file_name) {
+	const char* base_path = SDL_GetBasePath();
+	if (base_path == nullptr) {
+		LOGF("Font: SDL_GetBasePath failed: %s\n", SDL_GetError());
+		return {};
 	}
-
-	return paths;
-}
-
-static std::vector<uint8_t> load_fallback_font_data(bool bold, bool italic) {
-	for (const auto& path: fallback_font_candidates(fallback_font_file_name(bold, italic))) {
-		auto data = read_file_bytes(path);
-		if (!data.empty()) {
-			return data;
-		}
+	// SDL returns UTF-8; path(const char*) would read it in the Windows ANSI code page.
+	const auto path = Common::PathFromUtf8(base_path) / "assets" / "fonts" / file_name;
+	auto       data = read_file_bytes(path);
+	if (data.empty()) {
+		LOGF("Font: fallback font not found: %s\n", Common::PathToString(path).c_str());
 	}
-
-	return {};
+	return data;
 }
 
 static const std::vector<uint8_t>& fallback_font_data(bool bold, bool italic) {
-	static const auto regular     = load_fallback_font_data(false, false);
-	static const auto bold_data   = load_fallback_font_data(true, false);
-	static const auto italic_data = load_fallback_font_data(false, true);
-	static const auto bold_italic = load_fallback_font_data(true, true);
+	static const auto regular     = load_fallback_font_data("NotoSans-Regular.ttf");
+	static const auto bold_data   = load_fallback_font_data("NotoSans-Bold.ttf");
+	static const auto italic_data = load_fallback_font_data("NotoSans-Italic.ttf");
+	static const auto bold_italic = load_fallback_font_data("NotoSans-BoldItalic.ttf");
 
-	if (bold && italic && !bold_italic.empty()) {
+	if (bold && italic) {
 		return bold_italic;
 	}
-	if (bold && !bold_data.empty()) {
+	if (bold) {
 		return bold_data;
 	}
-	if (italic && !italic_data.empty()) {
+	if (italic) {
 		return italic_data;
 	}
 	return regular;