Be nicer to terrible fonts

thomasp85 · thomasp85 · commit c7c601095287 · 2025-09-30T10:07:15.000+02:00
diff --git a/NEWS.md b/NEWS.md
@@ -1,5 +1,9 @@
 # ragg (development version)
 
+* Fix support for the default symbol font on many linux distros
+  (StandardSymbolPS) by ensuring proper fallback during character metric
+  calculation (#136, #201)
+
 # ragg 1.5.0
 
 * Fix gradient rendering bug introduced by trying to fix #177 (#192)
diff --git a/src/AggDevice.h b/src/AggDevice.h
@@ -638,7 +638,7 @@ void AggDevice<PIXFMT, R_COLOR, BLNDFMT>::charMetric(int c, const char *family,
       Rf_ucstoutf8(str, (unsigned int) c);
       const char* str2 = Rf_utf8Toutf8NoPUA(str);
       int n = 0;
-      uint32_t* res = converter.convert(str2, n);
+      const uint32_t* res = converter.convert_to_ucs(str2, n);
       if (n > 0) c = res[0];
     }
 #endif
diff --git a/src/text_renderer.h b/src/text_renderer.h

Original file line number	Diff line number	Diff line change
`@@ -638,7 +638,7 @@ void AggDevice<PIXFMT, R_COLOR, BLNDFMT>::charMetric(int c, const char *family,`
`638`	`638`	`Rf_ucstoutf8(str, (unsigned int) c);`
`639`	`639`	`const char* str2 = Rf_utf8Toutf8NoPUA(str);`
`640`	`640`	`int n = 0;`
`641`		`- uint32_t* res = converter.convert(str2, n);`
	`641`	`+ const uint32_t* res = converter.convert_to_ucs(str2, n);`
`642`	`642`	`if (n > 0) c = res[0];`
`643`	`643`	`}`
`644`	`644`	`#endif`