diff options
Diffstat (limited to 'libass/ass_parse.c')
-rw-r--r-- | libass/ass_parse.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/libass/ass_parse.c b/libass/ass_parse.c index 0f3b4414..535e16f4 100644 --- a/libass/ass_parse.c +++ b/libass/ass_parse.c @@ -802,6 +802,81 @@ static char *parse_tag(ASS_Renderer *render_priv, char *p, double pwr) return p; } +void apply_transition_effects(ASS_Renderer *render_priv, ASS_Event *event) +{ + int v[4]; + int cnt; + char *p = event->Effect; + + if (!p || !*p) + return; + + cnt = 0; + while (cnt < 4 && (p = strchr(p, ';'))) { + v[cnt++] = atoi(++p); + } + + if (strncmp(event->Effect, "Banner;", 7) == 0) { + int delay; + if (cnt < 1) { + ass_msg(render_priv->library, MSGL_V, + "Error parsing effect: '%s'", event->Effect); + return; + } + if (cnt >= 2 && v[1] == 0) // right-to-left + render_priv->state.scroll_direction = SCROLL_RL; + else // left-to-right + render_priv->state.scroll_direction = SCROLL_LR; + + delay = v[0]; + if (delay == 0) + delay = 1; // ? + render_priv->state.scroll_shift = + (render_priv->time - render_priv->state.event->Start) / delay; + render_priv->state.evt_type = EVENT_HSCROLL; + return; + } + + if (strncmp(event->Effect, "Scroll up;", 10) == 0) { + render_priv->state.scroll_direction = SCROLL_BT; + } else if (strncmp(event->Effect, "Scroll down;", 12) == 0) { + render_priv->state.scroll_direction = SCROLL_TB; + } else { + ass_msg(render_priv->library, MSGL_V, + "Unknown transition effect: '%s'", event->Effect); + return; + } + // parse scroll up/down parameters + { + int delay; + int y0, y1; + if (cnt < 3) { + ass_msg(render_priv->library, MSGL_V, + "Error parsing effect: '%s'", event->Effect); + return; + } + delay = v[2]; + if (delay == 0) + delay = 1; // ? + render_priv->state.scroll_shift = + (render_priv->time - render_priv->state.event->Start) / delay; + if (v[0] < v[1]) { + y0 = v[0]; + y1 = v[1]; + } else { + y0 = v[1]; + y1 = v[0]; + } + if (y1 == 0) + y1 = render_priv->track->PlayResY; // y0=y1=0 means fullscreen scrolling + render_priv->state.clip_y0 = y0; + render_priv->state.clip_y1 = y1; + render_priv->state.evt_type = EVENT_VSCROLL; + render_priv->state.detect_collisions = 0; + } + +} + /** * \brief Get next ucs4 char from string, parsing and executing style overrides * \param str string pointer |