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Use blur with kernel [[1,2,1], [2,4,2], [1,2,1]] for \be.

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This is faster than gaussian blur and similar to vsfilter.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@28834 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
greg 2009-03-06 01:17:05 +00:00
parent e7cb3e94b6
commit d4423f7516
3 changed files with 34 additions and 14 deletions
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40
libass/ass_bitmap.c
View File

@ -255,11 +255,38 @@ static bitmap_t* fix_outline_and_shadow(bitmap_t* bm_g, bitmap_t* bm_o)
return bm_s;
}
int glyph_to_bitmap(ass_synth_priv_t* priv, ass_synth_priv_t* priv_blur,
/**
* \brief Blur with [[1,2,1]. [2,4,2], [1,2,1]] kernel
* This blur is the same as the one employed by vsfilter.
*/
static void be_blur(unsigned char *buf, int w, int h) {
unsigned int x, y;
unsigned int old_sum, new_sum;
for (y=0; y<h; y++) {
old_sum = 2 * buf[0];
for (x=0; x<w-1; x++) {
new_sum = buf[y*w+x] + buf[y*w+x+1];
buf[y*w+x] = (old_sum + new_sum) >> 2;
old_sum = new_sum;
}
}
for (x=0; x<w; x++) {
old_sum = 2 * buf[0];
for (y=0; y<h-1; y++) {
new_sum = buf[y*w+x] + buf[(y+1)*w+x];
buf[y*w+x] = (old_sum + new_sum) >> 2;
old_sum = new_sum;
}
}
}
int glyph_to_bitmap(ass_synth_priv_t* priv_blur,
FT_Glyph glyph, FT_Glyph outline_glyph, bitmap_t** bm_g,
bitmap_t** bm_o, bitmap_t** bm_s, int be, double blur_radius)
{
int bord = be ? (be+1) : 0;
int bord = be ? (be/4+1) : 0;
blur_radius *= 2;
bord = (blur_radius > 0.0) ? blur_radius : bord;
@ -279,19 +306,16 @@ int glyph_to_bitmap(ass_synth_priv_t* priv, ass_synth_priv_t* priv_blur,
return 1;
}
}
if (*bm_o) {
resize_tmp(priv, (*bm_o)->w, (*bm_o)->h);
if (*bm_o)
resize_tmp(priv_blur, (*bm_o)->w, (*bm_o)->h);
}
resize_tmp(priv, (*bm_g)->w, (*bm_g)->h);
resize_tmp(priv_blur, (*bm_g)->w, (*bm_g)->h);
if (be) {
while (be--) {
if (*bm_o)
blur((*bm_o)->buffer, priv->tmp, (*bm_o)->w, (*bm_o)->h, (*bm_o)->w, (int*)priv->gt2, priv->g_r, priv->g_w);
be_blur((*bm_o)->buffer, (*bm_o)->w, (*bm_o)->h);
else
blur((*bm_g)->buffer, priv->tmp, (*bm_g)->w, (*bm_g)->h, (*bm_g)->w, (int*)priv->gt2, priv->g_r, priv->g_w);
be_blur((*bm_g)->buffer, (*bm_g)->w, (*bm_g)->h);
}
} else {
if (blur_radius > 0.0) {

2
libass/ass_bitmap.h
View File

@ -46,7 +46,7 @@ typedef struct bitmap_s {
* \param bm_g out: pointer to the bitmap of glyph shadow is returned here
* \param be 1 = produces blurred bitmaps, 0 = normal bitmaps
*/
int glyph_to_bitmap(ass_synth_priv_t* priv, ass_synth_priv_t* priv_blur, FT_Glyph glyph, FT_Glyph outline_glyph, bitmap_t** bm_g, bitmap_t** bm_o, bitmap_t** bm_s, int be, double blur_radius);
int glyph_to_bitmap(ass_synth_priv_t* priv_blur, FT_Glyph glyph, FT_Glyph outline_glyph, bitmap_t** bm_g, bitmap_t** bm_o, bitmap_t** bm_s, int be, double blur_radius);
void ass_free_bitmap(bitmap_t* bm);

6
libass/ass_render.c
View File

@ -43,7 +43,6 @@
#define MAX_GLYPHS 3000
#define MAX_LINES 300
#define BE_RADIUS 1.5
#define BLUR_MAX_RADIUS 50.0
#define ROUND(x) ((int) ((x) + .5))
@ -83,7 +82,6 @@ struct ass_renderer_s {
ass_settings_t settings;
int render_id;
ass_synth_priv_t* synth_priv;
ass_synth_priv_t* synth_priv_blur;
ass_image_t* images_root; // rendering result is stored here
ass_image_t* prev_images_root;
@ -270,8 +268,7 @@ ass_renderer_t* ass_renderer_init(ass_library_t* library)
goto ass_init_exit;
}
priv->synth_priv = ass_synth_init(BE_RADIUS);
priv->synth_priv_blur = ass_synth_init(BLUR_MAX_RADIUS);
priv->synth_priv = ass_synth_init(BLUR_MAX_RADIUS);
priv->library = library;
priv->ftlibrary = ft;
@ -1503,7 +1500,6 @@ static void get_bitmap_glyph(glyph_info_t* info)
// render glyph
error = glyph_to_bitmap(ass_renderer->synth_priv,
ass_renderer->synth_priv_blur,
info->glyph, info->outline_glyph,
&info->bm, &info->bm_o,
&info->bm_s, info->be, info->blur * frame_context.border_scale);