Various things

Signed-off-by: Slendi <slendi@socopon.com>

src/App.cpp

@@ -6,6 +6,7 @@
 #include <cstdlib>
 #include <cstring>
 #include <span>
+#include <unordered_set>
 #include <vector>
 #include <poll.h>
 #include <pthread.h>
@@ -303,15 +304,33 @@ auto App::init_egl() -> void
 	auto const font = find_font_path();
 	assert(font && "Could not find font");
 	std::vector<std::filesystem::path> fallback_paths;
+	std::unordered_set<std::string> seen_paths;
+	auto const primary_path_str = font->string();
+
 	constexpr char const *fallback_candidates[] = {
 	    "Noto Sans CJK JP:style=Regular",
 	    "Noto Sans CJK SC:style=Regular",
 	    "Noto Sans CJK KR:style=Regular",
 	    "Noto Sans CJK TC:style=Regular",
+	    "sans-serif:lang=ja",
+	    "sans-serif:lang=ko",
+	    "sans-serif:lang=zh-cn",
+	    "sans-serif:lang=zh-tw",
+	    "sans-serif:lang=zh-hk",
 	};
 	for (auto const *name : fallback_candidates) {
-		if (auto fallback = find_font_path(name))
+		if (auto fallback = find_font_path(name)) {
+			auto const path_str = fallback->string();
+			if (path_str == primary_path_str)
+				continue;
+			if (!seen_paths.emplace(path_str).second)
+				continue;
 			fallback_paths.push_back(*fallback);
+		}
+	}
+	if (fallback_paths.empty()) {
+		TraceLog(LOG_WARNING,
+		    "No fallback fonts found; some glyphs may render as missing");
 	}
 	auto const font_handle
 	    = m_tr->load_font(*font, std::span(fallback_paths));

src/TextRenderer.cpp

@@ -13,6 +13,7 @@
 #include <unordered_map>
 #include <utility>
 #include <vector>
+#include <limits>
 
 #include <fontconfig/fontconfig.h>
 
@@ -635,7 +636,8 @@ auto TextRenderer::shape_text(FontHandle const font,
 	if (codepoints.empty())
 		return shaped;
 
-	std::vector<usize> selections(codepoints.size(), 0);
+	constexpr usize kNoFont = std::numeric_limits<usize>::max();
+	std::vector<usize> selections(codepoints.size(), kNoFont);
 	for (size_t i = 0; i < codepoints.size(); ++i) {
 		bool matched = false;
 		for (size_t candidate = 0; candidate < font_set.font_indices.size();
@@ -655,12 +657,16 @@ auto TextRenderer::shape_text(FontHandle const font,
 			}
 		}
 		if (!matched)
-			selections[i] = 0;
+			selections[i] = kNoFont;
 	}
 
 	size_t idx = 0;
 	while (idx < codepoints.size()) {
 		size_t font_choice = selections[idx];
+		if (font_choice == kNoFont) {
+			++idx;
+			continue;
+		}
 		if (font_choice >= font_set.font_indices.size())
 			font_choice = 0;
 		usize runtime_index = font_set.font_indices[font_choice];

src/Tick.cpp

@@ -30,7 +30,7 @@ auto App::tick() -> void
 
 	BeginDrawing();
 
-	ClearBackground(BLANK);
+	ClearBackground(theme().window.background);
 
 	DrawFPS(10, 10);
 	if (m_tr) {