BLF API: Add BLF_width_to_strlen,rstrlen gives a byte offset from a string width

1 files changed, 40 insertions, 0 deletions

diff --git a/source/blender/blenfont/intern/blf.c b/source/blender/blenfont/intern/blf.c
index 746ee3c0d93..a5aa19704ec 100644
--- a/source/blender/blenfont/intern/blf.c
+++ b/source/blender/blenfont/intern/blf.c
@@ -592,6 +592,46 @@ int BLF_draw_mono(int fontid, const char *str, size_t len, int cwidth)
 	return columns;
 }
 
+size_t BLF_width_to_strlen(int fontid, const char *str, size_t len, float width, float *r_width)
+{
+	FontBLF *font = blf_get(fontid);
+
+	if (font) {
+		const float xa = (font->flags & BLF_ASPECT) ? font->aspect[0] : 1.0f;
+		size_t ret;
+		ret = blf_font_width_to_strlen(font, str, len, width / xa, r_width);
+		if (r_width) {
+			*r_width *= xa;
+		}
+		return ret;
+	}
+
+	if (r_width) {
+		*r_width = 0.0f;
+	}
+	return 0;
+}
+
+size_t BLF_width_to_rstrlen(int fontid, const char *str, size_t len, float width, float *r_width)
+{
+	FontBLF *font = blf_get(fontid);
+
+	if (font) {
+		const float xa = (font->flags & BLF_ASPECT) ? font->aspect[0] : 1.0f;
+		size_t ret;
+		ret = blf_font_width_to_rstrlen(font, str, len, width / xa, r_width);
+		if (r_width) {
+			*r_width *= xa;
+		}
+		return ret;
+	}
+
+	if (r_width) {
+		*r_width = 0.0f;
+	}
+	return 0;
+}
+
 void BLF_boundbox(int fontid, const char *str, size_t len, rctf *box)
 {
 	FontBLF *font = blf_get(fontid);