*/
#include "hb-ot-shape-private.hh"
-#include "hb-ot-shape-complex-private.hh"
+#include "hb-ot-shape-normalize-private.hh"
#include "hb-font-private.hh"
+#include "hb-set-private.hh"
-HB_BEGIN_DECLS
hb_tag_t common_features[] = {
HB_TAG('c','c','m','p'),
+ 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'),
};
+
hb_tag_t horizontal_features[] = {
HB_TAG('c','a','l','t'),
HB_TAG('c','l','i','g'),
HB_TAG('c','u','r','s'),
HB_TAG('k','e','r','n'),
- HB_TAG('l','i','g','a'),
};
/* Note:
HB_TAG('v','r','t','2'),
};
+
+
+struct hb_ot_shape_planner_t
+{
+ hb_ot_map_builder_t map;
+ hb_ot_complex_shaper_t shaper;
+
+ hb_ot_shape_planner_t (void) : map () {}
+ ~hb_ot_shape_planner_t (void) { map.finish (); }
+
+ inline void compile (hb_face_t *face,
+ const hb_segment_properties_t *props,
+ struct hb_ot_shape_plan_t &plan)
+ {
+ plan.shaper = shaper;
+ map.compile (face, props, plan.map);
+ }
+
+ private:
+ NO_COPY (hb_ot_shape_planner_t);
+};
+
static void
hb_ot_shape_collect_features (hb_ot_shape_planner_t *planner,
const hb_segment_properties_t *props,
}
+struct hb_ot_shape_context_t
+{
+ /* Input to 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;
+
+ /* Transient stuff */
+ hb_direction_t target_direction;
+ hb_bool_t applied_position_complex;
+};
+
static void
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->plan->shaper, &c->plan->map, c->buffer); /* BUFFER: Clobbers var2 */
+ hb_ot_shape_complex_setup_masks (c->plan->shaper, &c->plan->map, c->buffer, c->font);
for (unsigned int i = 0; i < c->num_user_features; i++)
{
}
-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;
-
- 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);
- }
-
- hb_ot_layout_position_finish (c->buffer);
-
- c->applied_position_complex = TRUE;
- return;
-}
-
-
/* Main shaper */
/* Prepare */
hb_set_unicode_props (hb_buffer_t *buffer)
{
unsigned int count = buffer->len;
- for (unsigned int i = 1; i < count; i++)
- hb_glyph_info_set_unicode_props (&buffer->info[i], buffer->unicode);
+ for (unsigned int i = 0; i < count; i++)
+ _hb_glyph_info_set_unicode_props (&buffer->info[i], buffer->unicode);
}
static void
{
unsigned int count = buffer->len;
for (unsigned int i = 1; i < count; i++)
- if (FLAG (buffer->info[i].general_category()) &
+ if (FLAG (_hb_glyph_info_get_general_category (&buffer->info[i])) &
(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;
+ buffer->info[i].cluster = buffer->info[i - 1].cluster; /* XXX do the min() here */
}
static void
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_form_clusters (buffer);
hb_buffer_reverse_clusters (buffer);
buffer->props.direction = HB_DIRECTION_REVERSE (buffer->props.direction);
}
}
-static void
-hb_reset_glyph_infos (hb_buffer_t *buffer)
-{
- unsigned int count = buffer->len;
- for (unsigned int i = 0; i < count; i++)
- buffer->info[i].var1.u32 = buffer->info[i].var2.u32 = 0;
-}
-
/* Substitute */
unsigned int count = buffer->len - 1;
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 ();
+ if (unlikely (_hb_unicode_is_variation_selector (buffer->cur(+1).codepoint))) {
+ hb_font_get_glyph (font, buffer->cur().codepoint, buffer->cur(+1).codepoint, &glyph);
+ buffer->replace_glyphs (2, 1, &glyph);
} else {
- hb_font_get_glyph (font, buffer->info[buffer->idx].codepoint, 0, &glyph);
+ hb_font_get_glyph (font, buffer->cur().codepoint, 0, &glyph);
buffer->replace_glyph (glyph);
}
}
if (likely (buffer->idx < buffer->len)) {
- hb_font_get_glyph (font, buffer->info[buffer->idx].codepoint, 0, &glyph);
+ hb_font_get_glyph (font, buffer->cur().codepoint, 0, &glyph);
buffer->replace_glyph (glyph);
}
buffer->swap_buffers ();
static void
hb_substitute_default (hb_ot_shape_context_t *c)
{
+ hb_ot_layout_substitute_start (c->buffer);
+
+ hb_mirror_chars (c);
+
hb_map_glyphs (c->font, c->buffer);
}
static void
-hb_substitute_complex_fallback (hb_ot_shape_context_t *c HB_UNUSED)
+hb_ot_substitute_complex (hb_ot_shape_context_t *c)
{
- /* TODO Arabic */
+ if (hb_ot_layout_has_substitution (c->face)) {
+ c->plan->map.substitute (c->face, c->buffer);
+ }
+
+ hb_ot_layout_substitute_finish (c->buffer);
+
+ return;
}
}
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
hb_position_complex_fallback (hb_ot_shape_context_t *c HB_UNUSED)
{
/* TODO Mark pos */
hb_truetype_kern (c);
}
+static void
+hb_hide_zerowidth (hb_ot_shape_context_t *c)
+{
+ /* TODO Save the space character in the font? */
+ hb_codepoint_t space;
+ if (!hb_font_get_glyph (c->font, ' ', 0, &space))
+ return; /* No point! */
+
+ unsigned int count = c->buffer->len;
+ for (unsigned int i = 0; i < count; i++)
+ if (unlikely (_hb_glyph_info_is_zero_width (&c->buffer->info[i]))) {
+ c->buffer->info[i].codepoint = space;
+ c->buffer->pos[i].x_advance = 0;
+ c->buffer->pos[i].y_advance = 0;
+ }
+}
+
/* Do it! */
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); /* BUFFER: Clear buffer var1 and var2 */
+ HB_BUFFER_ALLOCATE_VAR (c->buffer, unicode_props0);
+ HB_BUFFER_ALLOCATE_VAR (c->buffer, unicode_props1);
+
+ hb_set_unicode_props (c->buffer);
- hb_set_unicode_props (c->buffer); /* BUFFER: Set general_category and combining_class in var1 */
+ hb_form_clusters (c->buffer);
hb_ensure_native_direction (c->buffer);
- _hb_ot_shape_normalize (c);
+ _hb_ot_shape_normalize (c->font, c->buffer, hb_ot_shape_complex_normalization_preference (c->plan->shaper));
- hb_ot_shape_setup_masks (c); /* BUFFER: Clobbers var2 */
+ hb_ot_shape_setup_masks (c);
/* SUBSTITUTE */
{
- hb_mirror_chars (c);
-
hb_substitute_default (c);
hb_ot_substitute_complex (c);
-
- if (!c->applied_substitute_complex)
- hb_substitute_complex_fallback (c);
}
/* POSITION */
hb_position_complex_fallback_visual (c);
}
+ hb_hide_zerowidth (c);
+
+ HB_BUFFER_DEALLOCATE_VAR (c->buffer, unicode_props1);
+ HB_BUFFER_DEALLOCATE_VAR (c->buffer, unicode_props0);
+
c->buffer->props.direction = c->target_direction;
+
+ c->buffer->deallocate_var_all ();
}
static void
{
hb_ot_shape_planner_t planner;
+ assert (HB_DIRECTION_IS_VALID (props->direction));
+
planner.shaper = hb_ot_shape_complex_categorize (props);
hb_ot_shape_collect_features (&planner, props, user_features, num_user_features);
hb_ot_shape_execute_internal (&c);
}
-void
-hb_ot_shape (hb_font_t *font,
- hb_buffer_t *buffer,
- const hb_feature_t *features,
- unsigned int num_features)
+hb_bool_t
+_hb_ot_shape (hb_font_t *font,
+ hb_buffer_t *buffer,
+ const hb_feature_t *features,
+ unsigned int num_features)
{
hb_ot_shape_plan_t plan;
+ 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
+void
+hb_ot_shape_glyphs_closure (hb_font_t *font,
+ hb_buffer_t *buffer,
+ const hb_feature_t *features,
+ unsigned int num_features,
+ hb_set_t *glyphs)
+{
+ hb_ot_shape_plan_t plan;
+
+ buffer->guess_properties ();
+
+ hb_ot_shape_plan_internal (&plan, font->face, &buffer->props, features, num_features);
+
+ /* TODO: normalization? have shapers do closure()? */
+ /* TODO: Deal with mirrored chars? */
+ hb_map_glyphs (font, buffer);
+
+ /* Seed it. It's user's responsibility to have cleard glyphs
+ * if that's what they desire. */
+ unsigned int count = buffer->len;
+ for (unsigned int i = 0; i < count; i++)
+ hb_set_add (glyphs, buffer->info[i].codepoint);
+
+ /* And find transitive closure. */
+ hb_set_t copy;
+ copy.init ();
+
+ do {
+ copy.set (glyphs);
+ plan.map.substitute_closure (font->face, glyphs);
+ } while (!copy.equal (glyphs));
+}
projects / framework / uifw / harfbuzz.git / blobdiff