1 files changed, 8 insertions, 0 deletions
diff --git a/video/out/opengl/utils.h b/video/out/opengl/utils.h
index 19edfe4b24..e1b849ffab 100644
--- a/video/out/opengl/utils.h
+++ b/video/out/opengl/utils.h
@@ -20,6 +20,7 @@
 #define MP_GL_UTILS_
 
 #include "common.h"
+#include "math.h"
 
 struct mp_log;
 
@@ -114,6 +115,13 @@ struct mp_rect_f {
     float x0, y0, x1, y1;
 };
 
+// Semantic equality (fuzzy comparison)
+static inline bool mp_rect_f_seq(struct mp_rect_f a, struct mp_rect_f b)
+{
+    return fabs(a.x0 - b.x0) < 1e-6 && fabs(a.x1 - b.x1) < 1e-6 &&
+           fabs(a.y0 - b.y0) < 1e-6 && fabs(a.y1 - b.y1) < 1e-6;
+}
+
 static inline void gl_transform_rect(struct gl_transform t, struct mp_rect_f *r)
 {
     gl_transform_vec(t, &r->x0, &r->y0);