* Red Hat Author(s): Behdad Esfahbod
*/
-#include "hb-ot-shape.h"
-
-#include "hb-buffer-private.hh"
+#include "hb-ot-shape-private.h"
#include "hb-open-type-private.hh"
};
static void
-setup_lookups (hb_face_t *face,
- hb_buffer_t *buffer,
- hb_feature_t *features,
- unsigned int num_features,
- hb_tag_t table_tag,
- lookup_map *lookups,
- unsigned int *num_lookups,
- hb_direction_t original_direction)
+setup_lookups (hb_ot_shape_context_t *c,
+ hb_tag_t table_tag,
+ lookup_map *lookups,
+ unsigned int *num_lookups)
{
unsigned int i, j, script_index, language_index, feature_index, room_lookups;
room_lookups = *num_lookups;
*num_lookups = 0;
- hb_ot_layout_table_choose_script (face, table_tag,
- hb_ot_tags_from_script (buffer->props.script),
+ hb_ot_layout_table_choose_script (c->face, table_tag,
+ hb_ot_tags_from_script (c->buffer->props.script),
&script_index);
- hb_ot_layout_script_find_language (face, table_tag, script_index,
- hb_ot_tag_from_language (buffer->props.language),
+ hb_ot_layout_script_find_language (c->face, table_tag, script_index,
+ hb_ot_tag_from_language (c->buffer->props.language),
&language_index);
hb_mask_allocator_t allocator;
- switch (original_direction) {
+ switch (c->original_direction) {
case HB_DIRECTION_LTR:
allocator.add_feature (HB_TAG ('l','t','r','a'), 1, true);
allocator.add_feature (HB_TAG ('l','t','r','m'), 1, true);
/* XXX complex-shaper features go here */
- for (unsigned int i = 0; i < num_features; i++) {
- const hb_feature_t *feature = &features[i];
+ for (unsigned int i = 0; i < c->num_features; i++) {
+ const hb_feature_t *feature = &c->features[i];
allocator.add_feature (feature->tag, feature->value, (feature->start == 0 && feature->end == (unsigned int) -1));
}
/* Compile features */
- allocator.compile (face, table_tag, script_index, language_index);
+ allocator.compile (c->face, table_tag, script_index, language_index);
/* Gather lookup indices for features and set buffer masks at the same time */
- if (hb_ot_layout_language_get_required_feature_index (face, table_tag, script_index, language_index,
+ if (hb_ot_layout_language_get_required_feature_index (c->face, table_tag, script_index, language_index,
&feature_index))
- add_feature (face, table_tag, feature_index, 1, lookups, num_lookups, room_lookups);
+ add_feature (c->face, table_tag, feature_index, 1, lookups, num_lookups, room_lookups);
const hb_mask_allocator_t::feature_map_t *map;
hb_mask_t global_mask = allocator.get_global_mask ();
if (global_mask)
- buffer->set_masks (global_mask, global_mask, 0, (unsigned int) -1);
+ c->buffer->set_masks (global_mask, global_mask, 0, (unsigned int) -1);
- switch (original_direction) {
+ switch (c->original_direction) {
case HB_DIRECTION_LTR:
map = allocator.find_feature (HB_TAG ('l','t','r','a'));
- add_feature (face, table_tag, map->index, map->mask, lookups, num_lookups, room_lookups);
+ add_feature (c->face, table_tag, map->index, map->mask, lookups, num_lookups, room_lookups);
map = allocator.find_feature (HB_TAG ('l','t','r','m'));
- add_feature (face, table_tag, map->index, map->mask, lookups, num_lookups, room_lookups);
+ add_feature (c->face, table_tag, map->index, map->mask, lookups, num_lookups, room_lookups);
break;
case HB_DIRECTION_RTL:
map = allocator.find_feature (HB_TAG ('r','t','l','a'));
- add_feature (face, table_tag, map->index, map->mask, lookups, num_lookups, room_lookups);
+ add_feature (c->face, table_tag, map->index, map->mask, lookups, num_lookups, room_lookups);
map = allocator.find_feature (HB_TAG ('r','t','l','m'));
- add_feature (face, table_tag, map->index, map->mask, lookups, num_lookups, room_lookups);
+ add_feature (c->face, table_tag, map->index, map->mask, lookups, num_lookups, room_lookups);
break;
case HB_DIRECTION_TTB:
case HB_DIRECTION_BTT:
for (i = 0; i < ARRAY_LENGTH (default_features); i++)
{
map = allocator.find_feature (default_features[i]);
- add_feature (face, table_tag, map->index, map->mask, lookups, num_lookups, room_lookups);
+ add_feature (c->face, table_tag, map->index, map->mask, lookups, num_lookups, room_lookups);
}
- for (i = 0; i < num_features; i++)
+ for (i = 0; i < c->num_features; i++)
{
- hb_feature_t *feature = &features[i];
+ hb_feature_t *feature = &c->features[i];
map = allocator.find_feature (feature->tag);
- add_feature (face, table_tag, map->index, map->mask, lookups, num_lookups, room_lookups);
+ add_feature (c->face, table_tag, map->index, map->mask, lookups, num_lookups, room_lookups);
if (!(feature->start == 0 && feature->end == (unsigned int)-1))
- buffer->set_masks (features[i].value << map->shift, map->mask, feature->start, feature->end);
+ c->buffer->set_masks (feature->value << map->shift, map->mask, feature->start, feature->end);
}
}
-static hb_bool_t
-hb_ot_substitute_complex (hb_font_t *font HB_UNUSED,
- hb_face_t *face,
- hb_buffer_t *buffer,
- hb_feature_t *features,
- unsigned int num_features,
- hb_direction_t original_direction)
+static void
+hb_ot_substitute_complex (hb_ot_shape_context_t *c)
{
lookup_map lookups[1000]; /* FIXME */
unsigned int num_lookups = ARRAY_LENGTH (lookups);
unsigned int i;
- if (!hb_ot_layout_has_substitution (face))
- return FALSE;
+ if (!hb_ot_layout_has_substitution (c->face))
+ return;
- setup_lookups (face, buffer, features, num_features,
- HB_OT_TAG_GSUB,
- lookups, &num_lookups,
- original_direction);
+ setup_lookups (c, HB_OT_TAG_GSUB, lookups, &num_lookups);
for (i = 0; i < num_lookups; i++)
- hb_ot_layout_substitute_lookup (face, buffer, lookups[i].index, lookups[i].mask);
+ hb_ot_layout_substitute_lookup (c->face, c->buffer, lookups[i].index, lookups[i].mask);
- return TRUE;
+ c->applied_substitute_complex = TRUE;
+ return;
}
-static hb_bool_t
-hb_ot_position_complex (hb_font_t *font,
- hb_face_t *face,
- hb_buffer_t *buffer,
- hb_feature_t *features,
- unsigned int num_features,
- hb_direction_t original_direction)
+static void
+hb_ot_position_complex (hb_ot_shape_context_t *c)
{
- lookup_map lookups[1000];
+ lookup_map lookups[1000]; /* FIXME */
unsigned int num_lookups = ARRAY_LENGTH (lookups);
unsigned int i;
- if (!hb_ot_layout_has_positioning (face))
- return FALSE;
+ if (!hb_ot_layout_has_positioning (c->face))
+ return;
- setup_lookups (face, buffer, features, num_features,
- HB_OT_TAG_GPOS,
- lookups, &num_lookups,
- original_direction);
+ setup_lookups (c, HB_OT_TAG_GPOS, lookups, &num_lookups);
for (i = 0; i < num_lookups; i++)
- hb_ot_layout_position_lookup (font, face, buffer, lookups[i].index, lookups[i].mask);
+ hb_ot_layout_position_lookup (c->font, c->face, c->buffer, lookups[i].index, lookups[i].mask);
- hb_ot_layout_position_finish (font, face, buffer);
+ hb_ot_layout_position_finish (c->font, c->face, c->buffer);
- return TRUE;
+ c->applied_position_complex = TRUE;
+ return;
}
buffer->info[i].cluster = buffer->info[i - 1].cluster;
}
-static hb_direction_t
+static void
hb_ensure_native_direction (hb_buffer_t *buffer)
{
- hb_direction_t original_direction = buffer->props.direction;
+ hb_direction_t direction = buffer->props.direction;
/* TODO vertical */
- if (HB_DIRECTION_IS_HORIZONTAL (original_direction) &&
- original_direction != _hb_script_get_horizontal_direction (buffer->props.script))
+ if (HB_DIRECTION_IS_HORIZONTAL (direction) &&
+ direction != _hb_script_get_horizontal_direction (buffer->props.script))
{
hb_buffer_reverse_clusters (buffer);
buffer->props.direction = HB_DIRECTION_REVERSE (buffer->props.direction);
}
-
- return original_direction;
}
}
static void
-hb_substitute_default (hb_font_t *font,
- hb_face_t *face,
- hb_buffer_t *buffer,
- hb_feature_t *features HB_UNUSED,
- unsigned int num_features HB_UNUSED)
+hb_substitute_default (hb_ot_shape_context_t *c)
{
- hb_map_glyphs (font, face, buffer);
+ hb_map_glyphs (c->font, c->face, c->buffer);
}
static void
-hb_substitute_complex_fallback (hb_font_t *font HB_UNUSED,
- hb_face_t *face HB_UNUSED,
- hb_buffer_t *buffer HB_UNUSED,
- hb_feature_t *features HB_UNUSED,
- unsigned int num_features HB_UNUSED)
+hb_substitute_complex_fallback (hb_ot_shape_context_t *c HB_UNUSED)
{
/* TODO Arabic */
}
/* Position */
static void
-hb_position_default (hb_font_t *font,
- hb_face_t *face,
- hb_buffer_t *buffer,
- hb_feature_t *features HB_UNUSED,
- unsigned int num_features HB_UNUSED)
+hb_position_default (hb_ot_shape_context_t *c)
{
- hb_buffer_clear_positions (buffer);
+ hb_buffer_clear_positions (c->buffer);
- unsigned int count = buffer->len;
+ unsigned int count = c->buffer->len;
for (unsigned int i = 0; i < count; i++) {
hb_glyph_metrics_t metrics;
- hb_font_get_glyph_metrics (font, face, buffer->info[i].codepoint, &metrics);
- buffer->pos[i].x_advance = metrics.x_advance;
- buffer->pos[i].y_advance = metrics.y_advance;
+ hb_font_get_glyph_metrics (c->font, c->face, c->buffer->info[i].codepoint, &metrics);
+ c->buffer->pos[i].x_advance = metrics.x_advance;
+ c->buffer->pos[i].y_advance = metrics.y_advance;
}
}
static void
-hb_position_complex_fallback (hb_font_t *font HB_UNUSED,
- hb_face_t *face HB_UNUSED,
- hb_buffer_t *buffer HB_UNUSED,
- hb_feature_t *features HB_UNUSED,
- unsigned int num_features HB_UNUSED)
+hb_position_complex_fallback (hb_ot_shape_context_t *c HB_UNUSED)
{
/* TODO Mark pos */
}
static void
-hb_truetype_kern (hb_font_t *font,
- hb_face_t *face,
- hb_buffer_t *buffer,
- hb_feature_t *features HB_UNUSED,
- unsigned int num_features HB_UNUSED)
+hb_truetype_kern (hb_ot_shape_context_t *c)
{
/* TODO Check for kern=0 */
- unsigned int count = buffer->len;
+ 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 (font, face, buffer->info[i - 1].codepoint, buffer->info[i].codepoint);
+ 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;
- buffer->pos[i - 1].x_advance += kern1;
- buffer->pos[i].x_advance += kern2;
- buffer->pos[i].x_offset += kern2;
+ c->buffer->pos[i - 1].x_advance += kern1;
+ c->buffer->pos[i].x_advance += kern2;
+ c->buffer->pos[i].x_offset += kern2;
}
}
static void
-hb_position_complex_fallback_visual (hb_font_t *font,
- hb_face_t *face,
- hb_buffer_t *buffer,
- hb_feature_t *features,
- unsigned int num_features)
+hb_position_complex_fallback_visual (hb_ot_shape_context_t *c)
{
- hb_truetype_kern (font, face, buffer, features, num_features);
+ hb_truetype_kern (c);
}
/* Do it! */
-void
-hb_ot_shape (hb_font_t *font,
- hb_face_t *face,
- hb_buffer_t *buffer,
- hb_feature_t *features,
- unsigned int num_features)
+static void
+hb_ot_shape_internal (hb_ot_shape_context_t *c)
{
- hb_direction_t original_direction;
- hb_bool_t substitute_fallback, position_fallback;
-
- hb_form_clusters (buffer);
+ hb_form_clusters (c->buffer);
/* SUBSTITUTE */
{
- buffer->clear_masks ();
+ c->buffer->clear_masks ();
/* Mirroring needs to see the original direction */
- hb_mirror_chars (buffer);
+ hb_mirror_chars (c->buffer);
- original_direction = hb_ensure_native_direction (buffer);
+ hb_ensure_native_direction (c->buffer);
- hb_substitute_default (font, face, buffer, features, num_features);
+ hb_substitute_default (c);
- substitute_fallback = !hb_ot_substitute_complex (font, face, buffer, features, num_features, original_direction);
+ hb_ot_substitute_complex (c);
- if (substitute_fallback)
- hb_substitute_complex_fallback (font, face, buffer, features, num_features);
+ if (!c->applied_substitute_complex)
+ hb_substitute_complex_fallback (c);
}
/* POSITION */
{
- buffer->clear_masks ();
+ c->buffer->clear_masks ();
- hb_position_default (font, face, buffer, features, num_features);
+ hb_position_default (c);
- position_fallback = !hb_ot_position_complex (font, face, buffer, features, num_features, original_direction);
+ hb_ot_position_complex (c);
+ hb_bool_t position_fallback = !c->applied_position_complex;
if (position_fallback)
- hb_position_complex_fallback (font, face, buffer, features, num_features);
+ hb_position_complex_fallback (c);
- if (HB_DIRECTION_IS_BACKWARD (buffer->props.direction))
- hb_buffer_reverse (buffer);
+ if (HB_DIRECTION_IS_BACKWARD (c->buffer->props.direction))
+ hb_buffer_reverse (c->buffer);
if (position_fallback)
- hb_position_complex_fallback_visual (font, face, buffer, features, num_features);
+ hb_position_complex_fallback_visual (c);
}
- buffer->props.direction = original_direction;
+ c->buffer->props.direction = c->original_direction;
+}
+
+void
+hb_ot_shape (hb_font_t *font,
+ hb_face_t *face,
+ hb_buffer_t *buffer,
+ hb_feature_t *features,
+ unsigned int num_features)
+{
+ hb_ot_shape_context_t c = {font, face, buffer, features, num_features};
+
+ /* Setup transient context members */
+ c.original_direction = buffer->props.direction;
+
+ hb_ot_shape_internal (&c);
}
projects / platform / upstream / libHarfBuzzSharp.git / commitdiff