Set a more reasonable maximum blur radius and make \blur animatable.

diff --git a/libass/ass_render.c b/libass/ass_render.c
index 66b513e23a4a4a23ea8fb14ab430972c143dece8..141de4954b4c46a96bd0602a89b8a5dff580e422 100644 (file)
--- a/libass/ass_render.c
+++ b/libass/ass_render.c
@@ -43,7 +43,7 @@
 
 #define MAX_GLYPHS_INITIAL 1024
 #define MAX_LINES_INITIAL 64
-#define BLUR_MAX_RADIUS 50.0
+#define BLUR_MAX_RADIUS 100.0
 #define MAX_BE 100
 #define ROUND(x) ((int) ((x) + .5))
 #define SUBPIXEL_MASK 56       // d6 bitmask for subpixel accuracy adjustment
@@ -865,6 +865,7 @@ static char* parse_tag(ass_renderer_t* render_priv, char* p, double pwr) {
        } else if (mystrcmp(&p, "blur")) {
                double val;
                if (mystrtod(&p, &val)) {
+                       val = render_priv->state.blur * (1-pwr) + val*pwr;
                        val = (val < 0) ? 0 : val;
                        val = (val > BLUR_MAX_RADIUS) ? BLUR_MAX_RADIUS : val;
                        render_priv->state.blur = val;