Index: third_party/harfbuzz-ng/src/hb-ot-shape.cc |
diff --git a/third_party/harfbuzz-ng/src/hb-ot-shape.cc b/third_party/harfbuzz-ng/src/hb-ot-shape.cc |
index 92c3925585c28df6d8e446979ec2769e39ed3b28..4275afc8251687acc577ff0b285de46313c2bc95 100644 |
--- a/third_party/harfbuzz-ng/src/hb-ot-shape.cc |
+++ b/third_party/harfbuzz-ng/src/hb-ot-shape.cc |
@@ -1,6 +1,6 @@ |
/* |
- * Copyright (C) 2009,2010 Red Hat, Inc. |
- * Copyright (C) 2010 Google, Inc. |
+ * Copyright © 2009,2010 Red Hat, Inc. |
+ * Copyright © 2010,2011 Google, Inc. |
* |
* This is part of HarfBuzz, a text shaping library. |
* |
@@ -29,53 +29,81 @@ |
#include "hb-ot-shape-private.hh" |
#include "hb-ot-shape-complex-private.hh" |
-HB_BEGIN_DECLS |
+#include "hb-font-private.hh" |
-/* XXX vertical */ |
-hb_tag_t default_features[] = { |
- HB_TAG('c','a','l','t'), |
+ |
+hb_tag_t common_features[] = { |
HB_TAG('c','c','m','p'), |
+ HB_TAG('l','o','c','l'), |
+ HB_TAG('m','a','r','k'), |
+ HB_TAG('m','k','m','k'), |
+ HB_TAG('r','l','i','g'), |
+}; |
+ |
+hb_tag_t horizontal_features[] = { |
+ HB_TAG('c','a','l','t'), |
HB_TAG('c','l','i','g'), |
- HB_TAG('c','s','w','h'), |
HB_TAG('c','u','r','s'), |
HB_TAG('k','e','r','n'), |
HB_TAG('l','i','g','a'), |
- HB_TAG('l','o','c','l'), |
- HB_TAG('m','a','r','k'), |
- HB_TAG('m','k','m','k'), |
- HB_TAG('r','l','i','g') |
+}; |
+ |
+/* Note: |
+ * Technically speaking, vrt2 and vert are mutually exclusive. |
+ * According to the spec, valt and vpal are also mutually exclusive. |
+ * But we apply them all for now. |
+ */ |
+hb_tag_t vertical_features[] = { |
+ HB_TAG('v','a','l','t'), |
+ HB_TAG('v','e','r','t'), |
+ HB_TAG('v','k','r','n'), |
+ HB_TAG('v','p','a','l'), |
+ HB_TAG('v','r','t','2'), |
}; |
static void |
-hb_ot_shape_collect_features (hb_ot_shape_plan_t *plan, |
+hb_ot_shape_collect_features (hb_ot_shape_planner_t *planner, |
const hb_segment_properties_t *props, |
- const hb_feature_t *user_features, |
- unsigned int num_user_features) |
+ const hb_feature_t *user_features, |
+ unsigned int num_user_features) |
{ |
switch (props->direction) { |
case HB_DIRECTION_LTR: |
- plan->map.add_bool_feature (HB_TAG ('l','t','r','a')); |
- plan->map.add_bool_feature (HB_TAG ('l','t','r','m')); |
+ planner->map.add_bool_feature (HB_TAG ('l','t','r','a')); |
+ planner->map.add_bool_feature (HB_TAG ('l','t','r','m')); |
break; |
case HB_DIRECTION_RTL: |
- plan->map.add_bool_feature (HB_TAG ('r','t','l','a')); |
- plan->map.add_bool_feature (HB_TAG ('r','t','l','m'), false); |
+ planner->map.add_bool_feature (HB_TAG ('r','t','l','a')); |
+ planner->map.add_bool_feature (HB_TAG ('r','t','l','m'), false); |
break; |
case HB_DIRECTION_TTB: |
case HB_DIRECTION_BTT: |
+ case HB_DIRECTION_INVALID: |
default: |
break; |
} |
- for (unsigned int i = 0; i < ARRAY_LENGTH (default_features); i++) |
- plan->map.add_bool_feature (default_features[i]); |
+#define ADD_FEATURES(array) \ |
+ HB_STMT_START { \ |
+ for (unsigned int i = 0; i < ARRAY_LENGTH (array); i++) \ |
+ planner->map.add_bool_feature (array[i]); \ |
+ } HB_STMT_END |
+ |
+ hb_ot_shape_complex_collect_features (planner->shaper, &planner->map, props); |
+ |
+ ADD_FEATURES (common_features); |
+ |
+ if (HB_DIRECTION_IS_HORIZONTAL (props->direction)) |
+ ADD_FEATURES (horizontal_features); |
+ else |
+ ADD_FEATURES (vertical_features); |
- hb_ot_shape_complex_collect_features (plan, props); |
+#undef ADD_FEATURES |
for (unsigned int i = 0; i < num_user_features; i++) { |
const hb_feature_t *feature = &user_features[i]; |
- plan->map.add_feature (feature->tag, feature->value, (feature->start == 0 && feature->end == (unsigned int) -1)); |
+ planner->map.add_feature (feature->tag, feature->value, (feature->start == 0 && feature->end == (unsigned int) -1)); |
} |
} |
@@ -86,7 +114,7 @@ hb_ot_shape_setup_masks (hb_ot_shape_context_t *c) |
hb_mask_t global_mask = c->plan->map.get_global_mask (); |
c->buffer->reset_masks (global_mask); |
- hb_ot_shape_complex_setup_masks (c); /* BUFFER: Clobbers var2 */ |
+ hb_ot_shape_complex_setup_masks (c->plan->shaper, &c->plan->map, c->buffer); |
for (unsigned int i = 0; i < c->num_user_features; i++) |
{ |
@@ -100,98 +128,54 @@ hb_ot_shape_setup_masks (hb_ot_shape_context_t *c) |
} |
-static void |
-hb_ot_substitute_complex (hb_ot_shape_context_t *c) |
-{ |
- if (!hb_ot_layout_has_substitution (c->face)) |
- return; |
- |
- c->plan->map.substitute (c->face, c->buffer); |
- |
- c->applied_substitute_complex = TRUE; |
- return; |
-} |
- |
-static void |
-hb_ot_position_complex (hb_ot_shape_context_t *c) |
-{ |
- |
- if (!hb_ot_layout_has_positioning (c->face)) |
- return; |
- |
- c->plan->map.position (c->font, c->face, c->buffer); |
- |
- hb_ot_layout_position_finish (c->buffer); |
- |
- c->applied_position_complex = TRUE; |
- return; |
-} |
- |
- |
/* Main shaper */ |
/* Prepare */ |
-static inline hb_bool_t |
-is_variation_selector (hb_codepoint_t unicode) |
-{ |
- return unlikely ((unicode >= 0x180B && unicode <= 0x180D) || /* MONGOLIAN FREE VARIATION SELECTOR ONE..THREE */ |
- (unicode >= 0xFE00 && unicode <= 0xFE0F) || /* VARIATION SELECTOR-1..16 */ |
- (unicode >= 0xE0100 && unicode <= 0xE01EF)); /* VARIATION SELECTOR-17..256 */ |
-} |
- |
-static void |
-hb_set_unicode_props (hb_ot_shape_context_t *c) |
+void |
+_hb_set_unicode_props (hb_buffer_t *buffer) |
{ |
- hb_unicode_get_general_category_func_t get_general_category = c->buffer->unicode->v.get_general_category; |
- hb_unicode_get_combining_class_func_t get_combining_class = c->buffer->unicode->v.get_combining_class; |
- hb_glyph_info_t *info = c->buffer->info; |
- |
- unsigned int count = c->buffer->len; |
- for (unsigned int i = 1; i < count; i++) { |
- info[i].general_category() = get_general_category (info[i].codepoint); |
- info[i].combining_class() = get_combining_class (info[i].codepoint); |
- } |
+ unsigned int count = buffer->len; |
+ for (unsigned int i = 1; i < count; i++) |
+ hb_glyph_info_set_unicode_props (&buffer->info[i], buffer->unicode); |
} |
static void |
-hb_form_clusters (hb_ot_shape_context_t *c) |
+hb_form_clusters (hb_buffer_t *buffer) |
{ |
- unsigned int count = c->buffer->len; |
+ unsigned int count = buffer->len; |
for (unsigned int i = 1; i < count; i++) |
- if (c->buffer->info[i].general_category() == HB_CATEGORY_NON_SPACING_MARK) |
- c->buffer->info[i].cluster = c->buffer->info[i - 1].cluster; |
+ if (FLAG (buffer->info[i].general_category()) & |
+ (FLAG (HB_UNICODE_GENERAL_CATEGORY_SPACING_MARK) | |
+ FLAG (HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK) | |
+ FLAG (HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK))) |
+ buffer->info[i].cluster = buffer->info[i - 1].cluster; |
} |
static void |
-hb_ensure_native_direction (hb_ot_shape_context_t *c) |
+hb_ensure_native_direction (hb_buffer_t *buffer) |
{ |
- hb_direction_t direction = c->buffer->props.direction; |
- |
- /* TODO vertical */ |
- if (HB_DIRECTION_IS_HORIZONTAL (direction) && |
- direction != _hb_script_get_horizontal_direction (c->buffer->props.script)) |
+ hb_direction_t direction = buffer->props.direction; |
+ |
+ /* TODO vertical: |
+ * The only BTT vertical script is Ogham, but it's not clear to me whether OpenType |
+ * Ogham fonts are supposed to be implemented BTT or not. Need to research that |
+ * first. */ |
+ if ((HB_DIRECTION_IS_HORIZONTAL (direction) && direction != hb_script_get_horizontal_direction (buffer->props.script)) || |
+ (HB_DIRECTION_IS_VERTICAL (direction) && direction != HB_DIRECTION_TTB)) |
{ |
- hb_buffer_reverse_clusters (c->buffer); |
- c->buffer->props.direction = HB_DIRECTION_REVERSE (c->buffer->props.direction); |
+ hb_buffer_reverse_clusters (buffer); |
+ buffer->props.direction = HB_DIRECTION_REVERSE (buffer->props.direction); |
} |
} |
-static void |
-hb_reset_glyph_infos (hb_ot_shape_context_t *c) |
-{ |
- unsigned int count = c->buffer->len; |
- for (unsigned int i = 0; i < count; i++) |
- c->buffer->info[i].var1.u32 = c->buffer->info[i].var2.u32 = 0; |
-} |
- |
/* Substitute */ |
static void |
hb_mirror_chars (hb_ot_shape_context_t *c) |
{ |
- hb_unicode_get_mirroring_func_t get_mirroring = c->buffer->unicode->v.get_mirroring; |
+ hb_unicode_funcs_t *unicode = c->buffer->unicode; |
if (HB_DIRECTION_IS_FORWARD (c->target_direction)) |
return; |
@@ -200,7 +184,7 @@ hb_mirror_chars (hb_ot_shape_context_t *c) |
unsigned int count = c->buffer->len; |
for (unsigned int i = 0; i < count; i++) { |
- hb_codepoint_t codepoint = get_mirroring (c->buffer->info[i].codepoint); |
+ hb_codepoint_t codepoint = hb_unicode_mirroring (unicode, c->buffer->info[i].codepoint); |
if (likely (codepoint == c->buffer->info[i].codepoint)) |
c->buffer->info[i].mask |= rtlm_mask; /* XXX this should be moved to before setting user-feature masks */ |
else |
@@ -210,31 +194,54 @@ hb_mirror_chars (hb_ot_shape_context_t *c) |
static void |
hb_map_glyphs (hb_font_t *font, |
- hb_face_t *face, |
hb_buffer_t *buffer) |
{ |
+ hb_codepoint_t glyph; |
+ |
if (unlikely (!buffer->len)) |
return; |
buffer->clear_output (); |
+ |
unsigned int count = buffer->len - 1; |
- for (buffer->i = 0; buffer->i < count;) { |
- if (unlikely (is_variation_selector (buffer->info[buffer->i + 1].codepoint))) { |
- buffer->replace_glyph (hb_font_get_glyph (font, face, buffer->info[buffer->i].codepoint, buffer->info[buffer->i + 1].codepoint)); |
- buffer->i++; |
+ for (buffer->idx = 0; buffer->idx < count;) { |
+ if (unlikely (is_variation_selector (buffer->info[buffer->idx + 1].codepoint))) { |
+ hb_font_get_glyph (font, buffer->info[buffer->idx].codepoint, buffer->info[buffer->idx + 1].codepoint, &glyph); |
+ buffer->replace_glyph (glyph); |
+ buffer->skip_glyph (); |
} else { |
- buffer->replace_glyph (hb_font_get_glyph (font, face, buffer->info[buffer->i].codepoint, 0)); |
+ hb_font_get_glyph (font, buffer->info[buffer->idx].codepoint, 0, &glyph); |
+ buffer->replace_glyph (glyph); |
} |
} |
- if (likely (buffer->i < buffer->len)) |
- buffer->replace_glyph (hb_font_get_glyph (font, face, buffer->info[buffer->i].codepoint, 0)); |
- buffer->swap (); |
+ if (likely (buffer->idx < buffer->len)) { |
+ hb_font_get_glyph (font, buffer->info[buffer->idx].codepoint, 0, &glyph); |
+ buffer->replace_glyph (glyph); |
+ } |
+ buffer->swap_buffers (); |
} |
static void |
hb_substitute_default (hb_ot_shape_context_t *c) |
{ |
- hb_map_glyphs (c->font, c->face, c->buffer); |
+ hb_ot_layout_substitute_start (c->buffer); |
+ |
+ hb_mirror_chars (c); |
+ |
+ hb_map_glyphs (c->font, c->buffer); |
+} |
+ |
+static void |
+hb_ot_substitute_complex (hb_ot_shape_context_t *c) |
+{ |
+ if (hb_ot_layout_has_substitution (c->face)) { |
+ c->plan->map.substitute (c->face, c->buffer); |
+ c->applied_substitute_complex = TRUE; |
+ } |
+ |
+ hb_ot_layout_substitute_finish (c->buffer); |
+ |
+ return; |
} |
static void |
@@ -249,14 +256,52 @@ hb_substitute_complex_fallback (hb_ot_shape_context_t *c HB_UNUSED) |
static void |
hb_position_default (hb_ot_shape_context_t *c) |
{ |
- hb_buffer_clear_positions (c->buffer); |
+ hb_ot_layout_position_start (c->buffer); |
unsigned int count = c->buffer->len; |
for (unsigned int i = 0; i < count; i++) { |
- hb_font_get_glyph_advance (c->font, c->face, c->buffer->info[i].codepoint, |
- &c->buffer->pos[i].x_advance, |
- &c->buffer->pos[i].y_advance); |
+ hb_font_get_glyph_advance_for_direction (c->font, c->buffer->info[i].codepoint, |
+ c->buffer->props.direction, |
+ &c->buffer->pos[i].x_advance, |
+ &c->buffer->pos[i].y_advance); |
+ hb_font_subtract_glyph_origin_for_direction (c->font, c->buffer->info[i].codepoint, |
+ c->buffer->props.direction, |
+ &c->buffer->pos[i].x_offset, |
+ &c->buffer->pos[i].y_offset); |
+ } |
+} |
+ |
+static void |
+hb_ot_position_complex (hb_ot_shape_context_t *c) |
+{ |
+ |
+ if (hb_ot_layout_has_positioning (c->face)) |
+ { |
+ /* Change glyph origin to what GPOS expects, apply GPOS, change it back. */ |
+ |
+ unsigned int count = c->buffer->len; |
+ for (unsigned int i = 0; i < count; i++) { |
+ hb_font_add_glyph_origin_for_direction (c->font, c->buffer->info[i].codepoint, |
+ HB_DIRECTION_LTR, |
+ &c->buffer->pos[i].x_offset, |
+ &c->buffer->pos[i].y_offset); |
+ } |
+ |
+ c->plan->map.position (c->font, c->buffer); |
+ |
+ for (unsigned int i = 0; i < count; i++) { |
+ hb_font_subtract_glyph_origin_for_direction (c->font, c->buffer->info[i].codepoint, |
+ HB_DIRECTION_LTR, |
+ &c->buffer->pos[i].x_offset, |
+ &c->buffer->pos[i].y_offset); |
+ } |
+ |
+ c->applied_position_complex = TRUE; |
} |
+ |
+ hb_ot_layout_position_finish (c->buffer); |
+ |
+ return; |
} |
static void |
@@ -271,13 +316,23 @@ hb_truetype_kern (hb_ot_shape_context_t *c) |
/* TODO Check for kern=0 */ |
unsigned int count = c->buffer->len; |
for (unsigned int i = 1; i < count; i++) { |
- hb_position_t kern, kern1, kern2; |
- kern = hb_font_get_kerning (c->font, c->face, c->buffer->info[i - 1].codepoint, c->buffer->info[i].codepoint); |
- kern1 = kern >> 1; |
- kern2 = kern - kern1; |
+ hb_position_t x_kern, y_kern, kern1, kern2; |
+ hb_font_get_glyph_kerning_for_direction (c->font, |
+ c->buffer->info[i - 1].codepoint, c->buffer->info[i].codepoint, |
+ c->buffer->props.direction, |
+ &x_kern, &y_kern); |
+ |
+ kern1 = x_kern >> 1; |
+ kern2 = x_kern - kern1; |
c->buffer->pos[i - 1].x_advance += kern1; |
c->buffer->pos[i].x_advance += kern2; |
c->buffer->pos[i].x_offset += kern2; |
+ |
+ kern1 = y_kern >> 1; |
+ kern2 = y_kern - kern1; |
+ c->buffer->pos[i - 1].y_advance += kern1; |
+ c->buffer->pos[i].y_advance += kern2; |
+ c->buffer->pos[i].y_offset += kern2; |
} |
} |
@@ -293,24 +348,26 @@ hb_position_complex_fallback_visual (hb_ot_shape_context_t *c) |
static void |
hb_ot_shape_execute_internal (hb_ot_shape_context_t *c) |
{ |
+ c->buffer->deallocate_var_all (); |
+ |
/* Save the original direction, we use it later. */ |
c->target_direction = c->buffer->props.direction; |
- hb_reset_glyph_infos (c); /* BUFFER: Clear buffer var1 and var2 */ |
+ HB_BUFFER_ALLOCATE_VAR (c->buffer, general_category); |
+ HB_BUFFER_ALLOCATE_VAR (c->buffer, combining_class); |
- hb_set_unicode_props (c); /* BUFFER: Set general_category and combining_class in var1 */ |
+ _hb_set_unicode_props (c->buffer); /* BUFFER: Set general_category and combining_class */ |
- hb_ensure_native_direction (c); |
+ hb_form_clusters (c->buffer); |
- hb_form_clusters (c); |
+ hb_ensure_native_direction (c->buffer); |
- hb_ot_shape_setup_masks (c); /* BUFFER: Clobbers var2 */ |
+ _hb_ot_shape_normalize (c); |
+ |
+ hb_ot_shape_setup_masks (c); |
/* SUBSTITUTE */ |
{ |
- /* Mirroring needs to see the original direction */ |
- hb_mirror_chars (c); |
- |
hb_substitute_default (c); |
hb_ot_substitute_complex (c); |
@@ -336,47 +393,56 @@ hb_ot_shape_execute_internal (hb_ot_shape_context_t *c) |
hb_position_complex_fallback_visual (c); |
} |
+ HB_BUFFER_DEALLOCATE_VAR (c->buffer, combining_class); |
+ HB_BUFFER_DEALLOCATE_VAR (c->buffer, general_category); |
+ |
c->buffer->props.direction = c->target_direction; |
+ |
+ c->buffer->deallocate_var_all (); |
} |
-void |
+static void |
hb_ot_shape_plan_internal (hb_ot_shape_plan_t *plan, |
hb_face_t *face, |
const hb_segment_properties_t *props, |
const hb_feature_t *user_features, |
unsigned int num_user_features) |
{ |
- plan->shaper = hb_ot_shape_complex_categorize (props); |
+ hb_ot_shape_planner_t planner; |
- hb_ot_shape_collect_features (plan, props, user_features, num_user_features); |
+ planner.shaper = hb_ot_shape_complex_categorize (props); |
- plan->map.compile (face, props); |
+ hb_ot_shape_collect_features (&planner, props, user_features, num_user_features); |
+ |
+ planner.compile (face, props, *plan); |
} |
-void |
+static void |
hb_ot_shape_execute (hb_ot_shape_plan_t *plan, |
hb_font_t *font, |
- hb_face_t *face, |
hb_buffer_t *buffer, |
const hb_feature_t *user_features, |
unsigned int num_user_features) |
{ |
- hb_ot_shape_context_t c = {plan, font, face, buffer, user_features, num_user_features}; |
+ hb_ot_shape_context_t c = {plan, font, font->face, buffer, user_features, num_user_features}; |
hb_ot_shape_execute_internal (&c); |
} |
-void |
-hb_ot_shape (hb_font_t *font, |
- hb_face_t *face, |
- hb_buffer_t *buffer, |
- const hb_feature_t *user_features, |
- unsigned int num_user_features) |
+hb_bool_t |
+hb_ot_shape (hb_font_t *font, |
+ hb_buffer_t *buffer, |
+ const hb_feature_t *features, |
+ unsigned int num_features, |
+ const char * const *shaper_options) |
{ |
hb_ot_shape_plan_t plan; |
- hb_ot_shape_plan_internal (&plan, face, &buffer->props, user_features, num_user_features); |
- hb_ot_shape_execute (&plan, font, face, buffer, user_features, num_user_features); |
+ buffer->guess_properties (); |
+ |
+ hb_ot_shape_plan_internal (&plan, font->face, &buffer->props, features, num_features); |
+ hb_ot_shape_execute (&plan, font, buffer, features, num_features); |
+ |
+ return TRUE; |
} |
-HB_END_DECLS |