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Better fix_outline implementation. No more "fix_outline failed" messages,

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should work even with the craziest glyphs.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@19947 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
eugeni 2006-09-23 00:15:00 +00:00
parent 6c8ab3f263
commit 64f3fac3a0
1 changed files with 16 additions and 13 deletions
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29
libass/ass_bitmap.c
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@ -162,20 +162,23 @@ static bitmap_t* glyph_to_bitmap_internal(FT_Glyph glyph, int bord)
static void fix_outline(bitmap_t* bm_g, bitmap_t* bm_o)
{
int x, y;
int sx = bm_g->left - bm_o->left;
int sy = bm_g->top - bm_o->top;
if (sx < 0 || sy < 0) {
mp_msg(MSGT_GLOBAL, MSGL_WARN, "fix_outline failed \n");
return;
}
for (y = 0; y < bm_g->h; ++y)
for (x = 0; x < bm_g->w; ++x) {
unsigned char c_g, c_o;
c_o = bm_o->buffer[(y + sy) * bm_o->w + (x + sx)];
c_g = bm_g->buffer[y * bm_g->w + x];
bm_o->buffer[(y + sy) * bm_o->w + (x + sx)] = (c_o > c_g) ? c_o - c_g : 0;
}
const int l = bm_o->left > bm_g->left ? bm_o->left : bm_g->left;
const int t = bm_o->top > bm_g->top ? bm_o->top : bm_g->top;
const int r = bm_o->left + bm_o->w < bm_g->left + bm_g->w ? bm_o->left + bm_o->w : bm_g->left + bm_g->w;
const int b = bm_o->top + bm_o->h < bm_g->top + bm_g->h ? bm_o->top + bm_o->h : bm_g->top + bm_g->h;
unsigned char* g = bm_g->buffer + (t - bm_g->top) * bm_g->w + (l - bm_g->left);
unsigned char* o = bm_o->buffer + (t - bm_o->top) * bm_o->w + (l - bm_o->left);
for (y = 0; y < b - t; ++y) {
for (x = 0; x < r - l; ++x) {
unsigned char c_g, c_o;
c_g = g[x];
c_o = o[x];
o[x] = (c_o > c_g) ? c_o - c_g : 0;
}
g += bm_g->w;
o += bm_o->w;
}
}
int glyph_to_bitmap(ass_synth_priv_t* priv, FT_Glyph glyph, FT_Glyph outline_glyph, bitmap_t** bm_g, bitmap_t** bm_o, int be)