/*
- * Copyright (C) 2009 Red Hat, Inc.
+ * Copyright © 2009 Red Hat, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
* Red Hat Author(s): Behdad Esfahbod
*/
-#include "hb-private.h"
+#include "hb-private.hh"
#include "hb-shape.h"
#include "hb-buffer-private.hh"
-#include "hb-ot-shape-private.hh"
+#include "hb-ot-shape.h"
+#ifdef HAVE_GRAPHITE
+#include "hb-graphite.h"
+#endif
-/* Prepare */
+HB_BEGIN_DECLS
-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_form_clusters (hb_buffer_t *buffer)
-{
- unsigned int count;
-
- count = buffer->in_length;
- for (buffer->in_pos = 1; buffer->in_pos < count; buffer->in_pos++)
- if (buffer->unicode->get_general_category (IN_CURGLYPH()) == HB_CATEGORY_NON_SPACING_MARK)
- IN_CLUSTER (buffer->in_pos) = IN_CLUSTER (buffer->in_pos - 1);
-}
-
-static hb_direction_t
-hb_ensure_native_direction (hb_buffer_t *buffer)
-{
- hb_direction_t original_direction = buffer->direction;
-
- /* TODO vertical */
- if (HB_DIRECTION_IS_HORIZONTAL (original_direction) &&
- original_direction != _hb_script_get_horizontal_direction (buffer->script))
- {
- hb_buffer_reverse_clusters (buffer);
- buffer->direction = HB_DIRECTION_REVERSE (buffer->direction);
- }
-
- return original_direction;
-}
-
-
-/* Substitute */
static void
-hb_mirror_chars (hb_buffer_t *buffer)
+hb_shape_internal (hb_font_t *font,
+ hb_buffer_t *buffer,
+ const hb_feature_t *features,
+ unsigned int num_features)
{
- unsigned int count;
- hb_unicode_get_mirroring_func_t get_mirroring = buffer->unicode->get_mirroring;
-
- if (HB_DIRECTION_IS_FORWARD (buffer->direction))
- return;
-
- count = buffer->in_length;
- for (buffer->in_pos = 0; buffer->in_pos < count; buffer->in_pos++) {
- IN_CURGLYPH() = get_mirroring (IN_CURGLYPH());
- }
+ hb_ot_shape (font, buffer, features, num_features);
}
-static void
-hb_map_glyphs (hb_font_t *font,
- hb_face_t *face,
- hb_buffer_t *buffer)
+void
+hb_shape (hb_font_t *font,
+ hb_buffer_t *buffer,
+ const hb_feature_t *features,
+ unsigned int num_features)
{
- unsigned int count;
-
- if (unlikely (!buffer->in_length))
- return;
- count = buffer->in_length - 1;
- for (buffer->in_pos = 0; buffer->in_pos < count; buffer->in_pos++) {
- if (unlikely (is_variation_selector (IN_NEXTGLYPH()))) {
- IN_CURGLYPH() = hb_font_get_glyph (font, face, IN_CURGLYPH(), IN_NEXTGLYPH());
- buffer->in_pos++;
- } else {
- IN_CURGLYPH() = hb_font_get_glyph (font, face, IN_CURGLYPH(), 0);
+ hb_segment_properties_t orig_props;
+
+ orig_props = buffer->props;
+
+ /* If script is set to INVALID, guess from buffer contents */
+ if (buffer->props.script == HB_SCRIPT_INVALID) {
+ hb_unicode_funcs_t *unicode = buffer->unicode;
+ unsigned int count = buffer->len;
+ for (unsigned int i = 0; i < count; i++) {
+ hb_script_t script = hb_unicode_script (unicode, buffer->info[i].codepoint);
+ if (likely (script != HB_SCRIPT_COMMON &&
+ script != HB_SCRIPT_INHERITED &&
+ script != HB_SCRIPT_UNKNOWN)) {
+ buffer->props.script = script;
+ break;
+ }
}
}
- IN_CURGLYPH() = hb_font_get_glyph (font, face, IN_CURGLYPH(), 0);
-}
-
-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_mirror_chars (buffer);
- hb_map_glyphs (font, face, buffer);
-}
-
-static hb_bool_t
-hb_substitute_complex (hb_font_t *font,
- hb_face_t *face,
- hb_buffer_t *buffer,
- hb_feature_t *features,
- unsigned int num_features)
-{
- return _hb_ot_substitute_complex (font, face, buffer, features, num_features);
-}
-
-static void
-hb_substitute_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)
-{
- /* 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)
-{
- unsigned int count;
-
- hb_buffer_clear_positions (buffer);
-
- count = buffer->in_length;
- for (buffer->in_pos = 0; buffer->in_pos < count; buffer->in_pos++) {
- hb_glyph_metrics_t metrics;
- hb_font_get_glyph_metrics (font, face, IN_CURGLYPH(), &metrics);
- CURPOSITION()->x_advance = metrics.x_advance;
- CURPOSITION()->y_advance = metrics.y_advance;
+ /* If direction is set to INVALID, guess from script */
+ if (buffer->props.direction == HB_DIRECTION_INVALID) {
+ buffer->props.direction = hb_script_get_horizontal_direction (buffer->props.script);
}
-}
-static hb_bool_t
-hb_position_complex (hb_font_t *font,
- hb_face_t *face,
- hb_buffer_t *buffer,
- hb_feature_t *features,
- unsigned int num_features)
-{
- return _hb_ot_position_complex (font, face, buffer, features, num_features);
-}
-
-static void
-hb_position_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)
-{
- /* 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)
-{
- unsigned int count;
-
- /* TODO Check for kern=0 */
- count = buffer->in_length;
- for (buffer->in_pos = 1; buffer->in_pos < count; buffer->in_pos++) {
- hb_position_t kern, kern1, kern2;
- kern = hb_font_get_kerning (font, face, IN_GLYPH(buffer->in_pos - 1), IN_CURGLYPH());
- kern1 = kern >> 1;
- kern2 = kern - kern1;
- POSITION(buffer->in_pos - 1)->x_advance += kern1;
- CURPOSITION()->x_advance += kern2;
- CURPOSITION()->x_offset += kern2;
+ /* If language is not set, use default language from locale */
+ if (buffer->props.language == HB_LANGUAGE_INVALID) {
+ /* TODO get_default_for_script? using $LANGUAGE */
+ buffer->props.language = hb_language_get_default ();
}
-}
-
-static void
-hb_position_fallback_visual (hb_font_t *font,
- hb_face_t *face,
- hb_buffer_t *buffer,
- hb_feature_t *features,
- unsigned int num_features)
-{
- hb_truetype_kern (font, face, buffer, features, num_features);
-}
-
-
-/* Shape */
-
-void
-hb_shape (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;
- hb_bool_t substitute_fallback, position_fallback;
-
- hb_form_clusters (buffer);
- hb_substitute_default (font, face, buffer, features, num_features);
+ hb_shape_internal (font, buffer, features, num_features);
- /* We do this after substitute_default because mirroring needs to
- * see the original direction. */
- original_direction = hb_ensure_native_direction (buffer);
-
- substitute_fallback = !hb_substitute_complex (font, face, buffer, features, num_features);
-
- if (substitute_fallback)
- hb_substitute_fallback (font, face, buffer, features, num_features);
-
- hb_position_default (font, face, buffer, features, num_features);
-
- position_fallback = !hb_position_complex (font, face, buffer, features, num_features);
-
- if (position_fallback)
- hb_position_fallback (font, face, buffer, features, num_features);
-
- if (HB_DIRECTION_IS_BACKWARD (buffer->direction))
- hb_buffer_reverse (buffer);
+ buffer->props = orig_props;
+}
- if (position_fallback)
- hb_position_fallback_visual (font, face, buffer, features, num_features);
- buffer->direction = original_direction;
-}
+HB_END_DECLS
projects / framework / uifw / harfbuzz.git / blobdiff