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Code Issues Wiki

libass: remove fribidi dependency

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This commit is contained in:
Dylan Araps 2021-07-07 14:02:09 +03:00
parent a762e950ea
commit 92f6a37b6f
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GPG Key ID: 13295DAC2CF13B5C
5 changed files with 230 additions and 1 deletions
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10
extra/libass/build
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@ -1,6 +1,16 @@
#!/bin/sh -e
patch -p1 < no-fribidi.patch
# Remove fribidi configure checks.
sed -e 's/as_fn_error.*fribidi/: 0 "/' \
-e '/pkg_requires="fribidi >= .*/d' \
configure > _
mv -f _ configure
chmod +x configure
./configure \
FRIBIDI_LIBS=" " \
--prefix=/usr \
--enable-fontconfig

1
extra/libass/checksums
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@ -1 +1,2 @@
1cdd39c9d007b06e737e7738004d7f38cf9b1e92843f37307b24e7ff63ab8e53
c6d5c147d795edde634178f3a1437c81fe932fcaaaf2c9fb8269f59f4da70897

1
extra/libass/depends
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@ -1,6 +1,5 @@
expat
fontconfig
freetype-harfbuzz
fribidi
nasm make
pkgconf make

218
extra/libass/patches/no-fribidi.patch Normal file
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@ -0,0 +1,218 @@
diff --git a/libass/ass_shaper.c b/libass/ass_shaper.c
index ffcb36b..849b55f 100644
--- a/libass/ass_shaper.c
+++ b/libass/ass_shaper.c
@@ -81,8 +81,7 @@ struct ass_shaper_font_data {
*/
void ass_shaper_info(ASS_Library *lib)
{
- ass_msg(lib, MSGL_INFO, "Shaper: FriBidi "
- FRIBIDI_VERSION " (SIMPLE)"
+ ass_msg(lib, MSGL_INFO, "Shaper: "
" HarfBuzz-ng %s (COMPLEX)", hb_version_string()
);
}
@@ -686,8 +685,7 @@ static bool shape_harfbuzz(ASS_Shaper *shaper, GlyphInfo *glyphs, size_t len)
hb_buffer_add_utf32(buf, shaper->event_text + offset, i - offset + 1,
0, i - offset + 1);
- props.direction = FRIBIDI_LEVEL_IS_RTL(level) ?
- HB_DIRECTION_RTL : HB_DIRECTION_LTR;
+ props.direction = HB_DIRECTION_LTR;
props.script = glyphs[offset].script;
props.language = hb_shaper_get_run_language(shaper, props.script);
hb_buffer_set_segment_properties(buf, &props);
@@ -754,33 +752,6 @@ void ass_shaper_determine_script(ASS_Shaper *shaper, GlyphInfo *glyphs,
}
}
-/**
- * \brief Shape event text with FriBidi. Does mirroring and simple
- * Arabic shaping.
- * \param len number of clusters
- */
-static void shape_fribidi(ASS_Shaper *shaper, GlyphInfo *glyphs, size_t len)
-{
- int i;
- FriBidiJoiningType *joins = calloc(sizeof(*joins), len);
-
- // shape on codepoint level
- fribidi_get_joining_types(shaper->event_text, len, joins);
- fribidi_join_arabic(shaper->ctypes, len, shaper->emblevels, joins);
- fribidi_shape(FRIBIDI_FLAGS_DEFAULT | FRIBIDI_FLAGS_ARABIC,
- shaper->emblevels, len, joins, shaper->event_text);
-
- // update indexes
- for (i = 0; i < len; i++) {
- GlyphInfo *info = glyphs + i;
- FT_Face face = info->font->faces[info->face_index];
- info->symbol = shaper->event_text[i];
- info->glyph_index = FT_Get_Char_Index(face, ass_font_index_magic(face, shaper->event_text[i]));
- }
-
- free(joins);
-}
-
/**
* \brief Toggle kerning for HarfBuzz shaping.
* \param shaper shaper instance
@@ -864,33 +835,6 @@ void ass_shaper_set_bidi_brackets(ASS_Shaper *shaper, bool match_brackets)
}
#endif
-/**
- * \brief Remove all zero-width invisible characters from the text.
- * \param text_info text
- */
-static void ass_shaper_skip_characters(TextInfo *text_info)
-{
- int i;
- GlyphInfo *glyphs = text_info->glyphs;
-
- for (i = 0; i < text_info->length; i++) {
- // Skip direction override control characters
- if ((glyphs[i].symbol <= 0x202e && glyphs[i].symbol >= 0x202a)
- || (glyphs[i].symbol <= 0x200f && glyphs[i].symbol >= 0x200b)
- || (glyphs[i].symbol <= 0x206f && glyphs[i].symbol >= 0x2060)
- || (glyphs[i].symbol <= 0xfe0f && glyphs[i].symbol >= 0xfe00)
- || (glyphs[i].symbol <= 0xe01ef && glyphs[i].symbol >= 0xe0100)
- || (glyphs[i].symbol <= 0x180f && glyphs[i].symbol >= 0x180b)
- || glyphs[i].symbol == 0x061c
- || glyphs[i].symbol == 0xfeff
- || glyphs[i].symbol == 0x00ad
- || glyphs[i].symbol == 0x034f) {
- glyphs[i].symbol = 0;
- glyphs[i].skip = true;
- }
- }
-}
-
/**
* \brief Shape an event's text. Calculates directional runs and shapes them.
* \param text_info event's text
@@ -898,52 +842,18 @@ static void ass_shaper_skip_characters(TextInfo *text_info)
*/
bool ass_shaper_shape(ASS_Shaper *shaper, TextInfo *text_info)
{
- int i, ret, last_break;
- FriBidiParType dir;
+ int i;
GlyphInfo *glyphs = text_info->glyphs;
if (!check_allocations(shaper, text_info->length))
return false;
// Get bidi character types and embedding levels
- last_break = 0;
for (i = 0; i < text_info->length; i++) {
shaper->event_text[i] = glyphs[i].symbol;
- // embedding levels should be calculated paragraph by paragraph
- if (glyphs[i].symbol == '\n' || i == text_info->length - 1) {
- dir = shaper->base_direction;
- fribidi_get_bidi_types(shaper->event_text + last_break,
- i - last_break + 1, shaper->ctypes + last_break);
-#ifdef USE_FRIBIDI_EX_API
- FriBidiBracketType *btypes = NULL;
- if (shaper->bidi_brackets) {
- btypes = shaper->btypes + last_break;
- fribidi_get_bracket_types(shaper->event_text + last_break,
- i - last_break + 1, shaper->ctypes + last_break,
- btypes);
- }
- ret = fribidi_get_par_embedding_levels_ex(
- shaper->ctypes + last_break, btypes,
- i - last_break + 1, &dir, shaper->emblevels + last_break);
-#else
- ret = fribidi_get_par_embedding_levels(shaper->ctypes + last_break,
- i - last_break + 1, &dir, shaper->emblevels + last_break);
-#endif
- if (ret == 0)
- return false;
- last_break = i + 1;
- }
}
- switch (shaper->shaping_level) {
- case ASS_SHAPING_SIMPLE:
- shape_fribidi(shaper, glyphs, text_info->length);
- ass_shaper_skip_characters(text_info);
- return true;
- case ASS_SHAPING_COMPLEX:
- default:
- return shape_harfbuzz(shaper, glyphs, text_info->length);
- }
+ return shape_harfbuzz(shaper, glyphs, text_info->length);
}
/**
@@ -955,7 +865,7 @@ ASS_Shaper *ass_shaper_new(void)
if (!shaper)
return NULL;
- shaper->base_direction = FRIBIDI_PAR_ON;
+ shaper->base_direction = 0;
if (!init_features(shaper))
goto error;
@@ -998,25 +908,12 @@ void ass_shaper_cleanup(ASS_Shaper *shaper, TextInfo *text_info)
*/
FriBidiStrIndex *ass_shaper_reorder(ASS_Shaper *shaper, TextInfo *text_info)
{
- int i, ret;
+ int i;
// Initialize reorder map
for (i = 0; i < text_info->length; i++)
shaper->cmap[i] = i;
- // Create reorder map line-by-line
- for (i = 0; i < text_info->n_lines; i++) {
- LineInfo *line = text_info->lines + i;
- FriBidiParType dir = FRIBIDI_PAR_ON;
-
- ret = fribidi_reorder_line(0,
- shaper->ctypes + line->offset, line->len, 0, dir,
- shaper->emblevels + line->offset, NULL,
- shaper->cmap + line->offset);
- if (ret == 0)
- return NULL;
- }
-
return shaper->cmap;
}
@@ -1034,10 +931,5 @@ FriBidiStrIndex *ass_shaper_get_reorder_map(ASS_Shaper *shaper)
*/
FriBidiParType resolve_base_direction(int enc)
{
- switch (enc) {
- case -1:
- return FRIBIDI_PAR_ON;
- default:
- return FRIBIDI_PAR_LTR;
- }
+ return 0;
}
diff --git a/libass/ass_shaper.h b/libass/ass_shaper.h
index 70bec9a..c0ff055 100644
--- a/libass/ass_shaper.h
+++ b/libass/ass_shaper.h
@@ -21,13 +21,14 @@
typedef struct ass_shaper ASS_Shaper;
-#include <fribidi.h>
#include <stdbool.h>
#include "ass_render.h"
-#if FRIBIDI_MAJOR_VERSION >= 1
-#define USE_FRIBIDI_EX_API
-#endif
+typedef uint32_t FriBidiChar;
+typedef uint32_t FriBidiCharType;
+typedef int FriBidiStrIndex;
+typedef int FriBidiParType;
+typedef signed char FriBidiLevel;
void ass_shaper_info(ASS_Library *lib);
ASS_Shaper *ass_shaper_new(void);

1
extra/libass/sources
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@ -1 +1,2 @@
https://github.com/libass/libass/releases/download/0.15.1/libass-0.15.1.tar.xz
patches/no-fribidi.patch