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Add right and left margins support to libass.

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Add ability to not use margins even when they are available.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@19544 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
eugeni 2006-08-26 18:24:37 +00:00
parent d8dab41707
commit a0f422546d
2 changed files with 18 additions and 4 deletions
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4
libass/ass.h
View File

@ -14,6 +14,10 @@ typedef struct ass_settings_s {
double line_spacing; // additional line spacing (in frame pixels)
int top_margin; // height of top margin. Everything except toptitles is shifted down by top_margin.
int bottom_margin; // height of bottom margin. (frame_height - top_margin - bottom_margin) is original video height.
int left_margin;
int right_margin;
int use_margins; // 0 - place all subtitles inside original frame
// 1 - use margins for placing toptitles and subtitles
double aspect; // frame aspect ratio, d_width / d_height.
} ass_settings_t;

18
libass/ass_render.c
View File

@ -117,6 +117,7 @@ typedef struct frame_context_s {
ass_instance_t* ass_priv;
int width, height; // screen dimensions
int orig_height; // frame height ( = screen height - margins )
int orig_width; // frame width ( = screen width - margins )
ass_track_t* track;
int add_bottom_margin; // additional margin, used to shift subtitles in case of collision
int add_top_margin;
@ -140,7 +141,8 @@ static void ass_lazy_track_init(void)
track->PlayResX = 384;
track->PlayResY = 288;
} else {
double orig_aspect = (global_settings->aspect * frame_context.height) / frame_context.orig_height;
double orig_aspect = (global_settings->aspect * frame_context.height * frame_context.orig_width) /
frame_context.orig_height / frame_context.width;
if (!track->PlayResY) {
track->PlayResY = track->PlayResX / orig_aspect + .5;
mp_msg(MSGT_GLOBAL, MSGL_WARN, "PlayResY undefined, setting %d \n", track->PlayResY);
@ -410,7 +412,7 @@ static int render_text(text_info_t* text_info, int dst_x, int dst_y)
* \brief Mapping between script and screen coordinates
*/
static int x2scr(int x) {
return x*frame_context.width / frame_context.track->PlayResX;
return x*frame_context.width / frame_context.track->PlayResX + global_settings->left_margin;
}
/**
* \brief Mapping between script and screen coordinates
@ -420,11 +422,18 @@ static int y2scr(int y) {
}
// the same for toptitles
static int y2scr_top(int y) {
return y * frame_context.orig_height / frame_context.track->PlayResY;
if (global_settings->use_margins)
return y * frame_context.orig_height / frame_context.track->PlayResY;
else
return y * frame_context.orig_height / frame_context.track->PlayResY + global_settings->top_margin;
}
// the same for subtitles
static int y2scr_sub(int y) {
return y * frame_context.orig_height / frame_context.track->PlayResY + global_settings->top_margin + global_settings->bottom_margin;
if (global_settings->use_margins)
return y * frame_context.orig_height / frame_context.track->PlayResY +
global_settings->top_margin + global_settings->bottom_margin;
else
return y * frame_context.orig_height / frame_context.track->PlayResY + global_settings->top_margin;
}
static void vmirror_bbox(FT_BBox* orig, FT_BBox* pbbox) {
@ -1745,6 +1754,7 @@ int ass_start_frame(ass_instance_t *priv, ass_track_t* track, long long now)
frame_context.ass_priv = priv;
frame_context.width = global_settings->frame_width;
frame_context.height = global_settings->frame_height;
frame_context.orig_width = global_settings->frame_width - global_settings->left_margin - global_settings->right_margin;
frame_context.orig_height = global_settings->frame_height - global_settings->top_margin - global_settings->bottom_margin;
frame_context.track = track;
frame_context.add_bottom_margin = 0;