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tl_shaped_string.cpp
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tl_shaped_string.cpp
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/*************************************************************************/
/* tl_shaped_string.cpp */
/*************************************************************************/
#include "resources/tl_shaped_string.hpp"
#ifdef GODOT_MODULE
#include "core/translation.h"
#include "servers/visual_server.h"
#else
#include <GlobalConstants.hpp>
#include <TranslationServer.hpp>
#include <VisualServer.hpp>
#endif
/*************************************************************************/
/* TLShapedString::Glyph */
/*************************************************************************/
TLShapedString::Glyph::Glyph(const Glyph &p_a) {
codepoint = p_a.codepoint;
offset = p_a.offset;
advance = p_a.advance;
}
TLShapedString::Glyph::Glyph() {
codepoint = 0;
}
TLShapedString::Glyph::Glyph(uint32_t p_codepoint, Point2 p_offset, Point2 p_advance) {
codepoint = p_codepoint;
offset = p_offset;
advance = p_advance;
}
/*************************************************************************/
/* TLShapedString::Cluster */
/*************************************************************************/
TLShapedString::Cluster::Cluster(const Cluster &p_a) {
start = p_a.start;
end = p_a.end;
offset = p_a.offset;
ascent = p_a.ascent;
descent = p_a.descent;
width = p_a.width;
valid = p_a.valid;
is_rtl = p_a.is_rtl;
ignore_on_input = p_a.ignore_on_input;
font_face = p_a.font_face;
script = p_a.script;
dir = p_a.dir;
lang = p_a.lang;
cl_type = p_a.cl_type;
glyphs = p_a.glyphs;
}
TLShapedString::Cluster::Cluster() {
start = -1;
end = -1;
offset = 0.0f;
ascent = 0.0f;
descent = 0.0f;
width = 0.0f;
valid = false;
is_rtl = false;
ignore_on_input = false;
font_face = NULL;
script = HB_SCRIPT_INVALID;
dir = HB_DIRECTION_INVALID;
lang = HB_LANGUAGE_INVALID;
cl_type = _CLUSTER_TYPE_INVALID;
}
/*************************************************************************/
/* TLShapedString::ScriptIterator */
/*************************************************************************/
bool TLShapedString::ScriptIterator::same_script(int32_t p_script_one, int32_t p_script_two) {
return p_script_one <= USCRIPT_INHERITED || p_script_two <= USCRIPT_INHERITED || p_script_one == p_script_two;
}
bool TLShapedString::ScriptIterator::next() {
if (is_rtl) {
cur--;
} else {
cur++;
}
return (cur >= 0) && (cur < (int64_t)script_ranges.size());
}
int32_t TLShapedString::ScriptIterator::get_start() const {
if ((cur >= 0) && (cur < (int64_t)script_ranges.size())) {
return script_ranges[cur].start;
} else {
return -1;
}
}
int32_t TLShapedString::ScriptIterator::get_end() const {
if ((cur >= 0) && (cur < (int64_t)script_ranges.size())) {
return script_ranges[cur].end;
} else {
return -1;
}
}
hb_script_t TLShapedString::ScriptIterator::get_script() const {
if ((cur >= 0) && (cur < (int64_t)script_ranges.size())) {
return script_ranges[cur].script;
} else {
return HB_SCRIPT_INVALID;
}
}
void TLShapedString::ScriptIterator::reset(hb_direction_t p_run_direction) {
if (p_run_direction == HB_DIRECTION_LTR) {
cur = -1;
is_rtl = false;
} else {
cur = (int64_t)script_ranges.size();
is_rtl = true;
}
}
TLShapedString::ScriptIterator::ScriptIterator(const UChar *p_chars, int32_t p_start, int32_t p_length) {
struct ParenStackEntry {
int32_t pair_index;
UScriptCode script_code;
};
if (p_start >= p_length)
p_start = p_length - 1;
if (p_start < 0)
p_start = 0;
ParenStackEntry paren_stack[128];
int32_t script_start;
int32_t script_end = p_start;
UScriptCode script_code;
int32_t paren_sp = -1;
int32_t start_sp = paren_sp;
UErrorCode err = U_ZERO_ERROR;
do {
script_code = USCRIPT_COMMON;
for (script_start = script_end; script_end < p_length; script_end = next_bound(p_chars, script_end + 1, p_length)) {
UChar32 ch;
U16_GET(p_chars, 0, script_end, p_length, ch);
UScriptCode sc = uscript_getScript(ch, &err);
if (U_FAILURE(err)) {
ERR_PRINTS(u_errorName(err));
ERR_FAIL_COND(true);
}
if (u_getIntPropertyValue(ch, UCHAR_BIDI_PAIRED_BRACKET_TYPE) != U_BPT_NONE) {
if (u_getIntPropertyValue(ch, UCHAR_BIDI_PAIRED_BRACKET_TYPE) == U_BPT_OPEN) {
paren_stack[++paren_sp].pair_index = ch;
paren_stack[paren_sp].script_code = script_code;
} else if (paren_sp >= 0) {
UChar32 paired_ch = u_getBidiPairedBracket(ch);
while (paren_sp >= 0 && paren_stack[paren_sp].pair_index != paired_ch)
paren_sp -= 1;
if (paren_sp < start_sp) start_sp = paren_sp;
if (paren_sp >= 0) sc = paren_stack[paren_sp].script_code;
}
}
if (same_script(script_code, sc)) {
if (script_code <= USCRIPT_INHERITED && sc > USCRIPT_INHERITED) {
script_code = sc;
while (start_sp < paren_sp)
paren_stack[++start_sp].script_code = script_code;
}
if ((u_getIntPropertyValue(ch, UCHAR_BIDI_PAIRED_BRACKET_TYPE) == U_BPT_CLOSE) && paren_sp >= 0) {
paren_sp -= 1;
if (start_sp >= 0) {
start_sp -= 1;
}
}
} else {
break;
}
}
ScriptRange rng;
rng.script = hb_icu_script_to_script(script_code);
rng.start = script_start;
rng.end = script_end;
script_ranges.push_back(rng);
} while (script_end < p_length);
}
/*************************************************************************/
/* TLShapedString (Base) */
/*************************************************************************/
void TLShapedString::_clear_props() {
if (bidi_iter) {
ubidi_close(bidi_iter);
bidi_iter = NULL;
}
if (script_iter) {
delete script_iter;
script_iter = NULL;
}
_clear_visual();
}
void TLShapedString::_clear_visual() {
valid = false;
visual.clear();
ascent = 0.0f;
descent = 0.0f;
width = 0.0f;
}
void TLShapedString::_generate_kashida_justification_opportunies(int64_t p_start, int64_t p_end, /*out*/ std::vector<JustificationOpportunity> &p_ops) const {
int32_t kashida_pos = -1;
int8_t priority = 100;
int64_t i = p_start;
uint32_t pc = 0;
while ((p_end > p_start) && is_transparent(get_char(p_end - 1)))
p_end--;
while (i < p_end) {
uint32_t c = get_char(i);
if (c == 0x0640) {
kashida_pos = i;
priority = 0;
}
if (priority >= 1 && i < p_end - 1) {
if (is_seen_sad(c) && (get_char(i + 1) != 0x200C)) {
kashida_pos = i;
priority = 1;
}
}
if (priority >= 2 && i > p_start) {
if (is_teh_marbuta(c) || is_dal(c) || (is_heh(c) && i == p_end - 1)) {
if (is_connected_to_prev(c, pc)) {
kashida_pos = i - 1;
priority = 2;
}
}
}
if (priority >= 3 && i > p_start) {
if (is_alef(c) || ((is_lam(c) || is_tah(c) || is_kaf(c) || is_gaf(c)) && i == p_end - 1)) {
if (is_connected_to_prev(c, pc)) {
kashida_pos = i - 1;
priority = 3;
}
}
}
if (priority >= 4 && i > p_start && i < p_end - 1) {
if (is_beh(c)) {
if (is_reh(get_char(i + 1)) || is_yeh(get_char(i + 1))) {
if (is_connected_to_prev(c, pc)) {
kashida_pos = i - 1;
priority = 4;
}
}
}
}
if (priority >= 5 && i > p_start) {
if (is_waw(c) || ((is_ain(c) || is_qaf(c) || is_feh(c)) && i == p_end - 1)) {
if (is_connected_to_prev(c, pc)) {
kashida_pos = i - 1;
priority = 5;
}
}
}
if (priority >= 6 && i > p_start) {
if (is_reh(c)) {
if (is_connected_to_prev(c, pc)) {
kashida_pos = i - 1;
priority = 6;
}
}
}
if (!is_transparent(c)) pc = c;
i++;
}
if (kashida_pos > -1) {
JustificationOpportunity op;
op.position = kashida_pos;
op.kashida = true;
p_ops.push_back(op);
}
}
void TLShapedString::_generate_justification_opportunies(int32_t p_start, int32_t p_end, const char *p_lang, /*out*/ std::vector<JustificationOpportunity> &p_ops) const {
UErrorCode err = U_ZERO_ERROR;
UBreakIterator *bi = ubrk_open(UBRK_WORD, p_lang, &data[p_start], p_end - p_start, &err);
if (U_FAILURE(err)) {
//No data - use fallback
_generate_justification_opportunies_fallback(p_start, p_end, p_ops);
return;
}
int64_t limit = 0;
while (ubrk_next(bi) != UBRK_DONE) {
if (ubrk_getRuleStatus(bi) != UBRK_WORD_NONE) {
_generate_kashida_justification_opportunies(p_start + limit, p_start + ubrk_current(bi), p_ops);
UChar32 pch, nch;
U16_GET(data, 0, p_start + ubrk_current(bi) - 1, data_size, pch);
U16_GET(data, 0, p_start + ubrk_current(bi), data_size, nch);
if (!u_ispunct(pch) && !(u_charType(nch) == U_DASH_PUNCTUATION)) { //ignore justification before punctuation and after dashes
JustificationOpportunity op;
op.position = p_start + ubrk_current(bi);
op.kashida = false;
p_ops.push_back(op);
}
limit = ubrk_current(bi) + 1;
}
}
ubrk_close(bi);
}
void TLShapedString::_generate_justification_opportunies_fallback(int32_t p_start, int32_t p_end, /*out*/ std::vector<JustificationOpportunity> &p_ops) const {
int64_t limit = p_start;
for (int64_t i = p_start; i < p_end; i++) {
if (u_isWhitespace(get_char(i))) {
_generate_kashida_justification_opportunies(limit, i, p_ops);
UChar32 pch, nch;
U16_GET(data, 0, i - 1, data_size, pch);
U16_GET(data, 0, i, data_size, nch);
if (!u_ispunct(pch) && !(u_charType(nch) == U_DASH_PUNCTUATION)) { //ignore justification before punctuation and after dashes
JustificationOpportunity op;
op.position = i;
op.kashida = false;
p_ops.push_back(op);
}
limit = i + 1;
}
}
_generate_kashida_justification_opportunies(limit, p_end, p_ops);
}
void TLShapedString::_generate_break_opportunies(int32_t p_start, int32_t p_end, const char *p_lang, /*out*/ std::vector<BreakOpportunity> &p_ops) const {
UErrorCode err = U_ZERO_ERROR;
UBreakIterator *bi = ubrk_open(UBRK_LINE, p_lang, &data[p_start], p_end - p_start, &err);
if (U_FAILURE(err)) {
//No data - use fallback
_generate_break_opportunies_fallback(p_start, p_end, p_ops);
return;
}
while (ubrk_next(bi) != UBRK_DONE) {
UChar32 nch;
U16_GET(data, 0, p_start + ubrk_current(bi), data_size, nch);
if ((nch != 0x1361) || (ubrk_getRuleStatus(bi) == UBRK_LINE_HARD)) { //do not soft break before ethiopic wordspace
BreakOpportunity op;
op.position = p_start + ubrk_current(bi);
op.hard = (ubrk_getRuleStatus(bi) == UBRK_LINE_HARD);
p_ops.push_back(op);
}
}
ubrk_close(bi);
}
void TLShapedString::_generate_break_opportunies_fallback(int32_t p_start, int32_t p_end, /*out*/ std::vector<BreakOpportunity> &p_ops) const {
for (int64_t i = p_start; i < p_end; i++) {
if (is_break(get_char(i))) {
BreakOpportunity op;
op.position = i + 1;
op.hard = true;
p_ops.push_back(op);
} else if (u_isWhitespace(get_char(i))) {
UChar32 nch;
U16_GET(data, 0, i + 1, data_size, nch);
if (nch != 0x1361) { //do not soft break before ethiopic wordspace
BreakOpportunity op;
op.position = i + 1;
op.hard = false;
p_ops.push_back(op);
}
}
}
BreakOpportunity op;
op.position = p_end;
op.hard = false;
p_ops.push_back(op);
}
void TLShapedString::_shape_full_string() {
//Already shaped, nothing to do
if (valid) {
return;
}
//Nothing to shape
if (data_size == 0)
return;
//Create BiDi iterator
if (!bidi_iter) {
UErrorCode err = U_ZERO_ERROR;
bidi_iter = ubidi_openSized(data_size, 0, &err);
if (U_FAILURE(err)) {
ERR_PRINTS(u_errorName(err));
ERR_FAIL_COND(true);
}
switch (base_direction) {
case TEXT_DIRECTION_LOCALE: {
bool is_rtl = uloc_isRightToLeft(TranslationServer::get_singleton()->get_locale().ascii().get_data());
ubidi_setPara(bidi_iter, data, data_size, is_rtl ? UBIDI_RTL : UBIDI_LTR, NULL, &err);
para_direction = is_rtl ? TEXT_DIRECTION_RTL : TEXT_DIRECTION_LTR;
} break;
case TEXT_DIRECTION_LTR: {
ubidi_setPara(bidi_iter, data, data_size, UBIDI_LTR, NULL, &err);
para_direction = TEXT_DIRECTION_LTR;
} break;
case TEXT_DIRECTION_RTL: {
ubidi_setPara(bidi_iter, data, data_size, UBIDI_RTL, NULL, &err);
para_direction = TEXT_DIRECTION_RTL;
} break;
case TEXT_DIRECTION_AUTO: {
UBiDiDirection direction = ubidi_getBaseDirection(data, data_size);
if (direction != UBIDI_NEUTRAL) {
ubidi_setPara(bidi_iter, data, data_size, direction, NULL, &err);
para_direction = (direction == UBIDI_RTL) ? TEXT_DIRECTION_RTL : TEXT_DIRECTION_LTR;
} else {
bool is_rtl = uloc_isRightToLeft(TranslationServer::get_singleton()->get_locale().ascii().get_data());
ubidi_setPara(bidi_iter, data, data_size, is_rtl ? UBIDI_RTL : UBIDI_LTR, NULL, &err);
para_direction = is_rtl ? TEXT_DIRECTION_RTL : TEXT_DIRECTION_LTR;
}
} break;
case TEXT_DIRECTION_INVALID: {
ERR_PRINTS("Invalid base direction!");
ERR_FAIL_COND(true);
}
}
if (U_FAILURE(err)) {
ERR_PRINTS(u_errorName(err));
ERR_FAIL_COND(true);
}
}
//Create Script iterator
if (!script_iter) {
script_iter = new ScriptIterator(data, 0, data_size);
}
//Find BiDi runs in visual order
UErrorCode err = U_ZERO_ERROR;
int64_t bidi_run_count = ubidi_countRuns(bidi_iter, &err);
if (U_FAILURE(err)) {
ERR_PRINTS(u_errorName(err));
ERR_FAIL_COND(true);
}
for (int64_t i = 0; i < bidi_run_count; i++) {
int32_t bidi_run_start = 0;
int32_t bidi_run_length = 0;
hb_direction_t bidi_run_direction = (ubidi_getVisualRun(bidi_iter, i, &bidi_run_start, &bidi_run_length) == UBIDI_LTR) ? HB_DIRECTION_LTR : HB_DIRECTION_RTL;
_shape_bidi_run(bidi_run_direction, bidi_run_start, bidi_run_start + bidi_run_length);
}
//Calculate ascent, descent and width
if (visual.size() > 0) {
float max_neg_offset = 0.0f;
float max_pos_offset = 0.0f;
float max_ascent = 0.0f;
float max_descent = 0.0f;
float offset = 0.0f;
for (int64_t i = 0; i < (int64_t)visual.size(); i++) {
//Calc max ascent / descent
if (max_ascent < visual[i].ascent) {
max_ascent = visual[i].ascent;
}
if (max_descent < visual[i].descent) {
max_descent = visual[i].descent;
}
width += visual[i].width;
for (int64_t j = 0; j < (int64_t)visual[i].glyphs.size(); j++) {
//Calc max offsets for glyphs shifted from baseline and add glyphs width
if (visual[i].glyphs[j].offset.y > max_pos_offset) {
max_pos_offset = visual[i].glyphs[j].offset.y;
}
if (visual[i].glyphs[j].offset.y < max_neg_offset) {
max_neg_offset = visual[i].glyphs[j].offset.y;
}
}
visual[i].offset = offset;
offset += visual[i].width;
}
ascent = MAX(max_ascent, -max_neg_offset);
descent = MAX(max_descent, max_pos_offset);
} else {
ascent = 15.0f;
descent = 5.0f;
if (base_font.is_valid()) {
TLFontFallbackIterator font_iter = base_font->get_face(base_style);
if (font_iter.is_valid()) {
Ref<TLFontFace> _font = font_iter.value();
if (!_font.is_null()) {
ascent = _font->get_ascent(base_size);
descent = _font->get_descent(base_size);
}
}
}
}
//Ready
valid = true;
emit_signal("string_shaped");
}
void TLShapedString::_shape_substring(TLShapedString *p_ref, int64_t p_start, int64_t p_end, int p_trim) const {
if (!p_ref)
return;
p_ref->_clear_props();
p_ref->_clear_visual();
//Trim edge line breaks chars or all ws
if (p_trim == TEXT_TRIM_BREAK_AND_WHITESPACE) {
while ((p_end > p_start) && u_isWhitespace(get_char(p_end - 1))) {
p_end--;
}
while ((p_end > p_start) && u_isWhitespace(get_char(p_start))) {
p_start++;
}
} else if (p_trim == TEXT_TRIM_BREAK) {
while ((p_end > p_start) && is_break(get_char(p_end - 1))) {
p_end--;
}
while ((p_end > p_start) && is_break(get_char(p_start))) {
p_start++;
}
}
//Copy substring data
p_ref->data = (UChar *)std::malloc((p_end - p_start + 1) * sizeof(UChar));
std::memcpy(p_ref->data, &data[p_start], (p_end - p_start) * sizeof(UChar));
p_ref->data[p_end - p_start] = 0x0000;
p_ref->data_size = (p_end - p_start);
p_ref->char_size = u_countChar32(p_ref->data, p_ref->data_size);
p_ref->base_direction = base_direction;
p_ref->para_direction = para_direction;
if (p_ref->base_font.is_valid() && p_ref->base_font->is_connected(_CHANGED, p_ref, "_font_changed")) {
p_ref->base_font->disconnect(_CHANGED, p_ref, "_font_changed");
}
p_ref->base_font = base_font;
if (p_ref->base_font.is_valid() && !p_ref->base_font->is_connected(_CHANGED, p_ref, "_font_changed")) {
p_ref->base_font->connect(_CHANGED, p_ref, "_font_changed");
}
p_ref->base_style = base_style;
p_ref->base_size = base_size;
p_ref->language = language;
p_ref->font_features = font_features;
UErrorCode err = U_ZERO_ERROR;
//Create temporary line bidi & shape
p_ref->bidi_iter = ubidi_openSized((p_end - p_start), 0, &err);
if (U_FAILURE(err)) {
p_ref->bidi_iter = NULL;
//Do not error out on failure - just continue with full reshapeing
} else {
ubidi_setLine(bidi_iter, p_start, p_end, p_ref->bidi_iter, &err);
if (U_FAILURE(err)) {
ubidi_close(p_ref->bidi_iter);
p_ref->bidi_iter = NULL;
}
}
p_ref->_shape_full_string();
//Close temorary line BiDi
if (p_ref->bidi_iter) {
ubidi_close(p_ref->bidi_iter);
p_ref->bidi_iter = NULL;
}
}
void TLShapedString::_shape_bidi_run(hb_direction_t p_run_direction, int32_t p_run_start, int32_t p_run_end) {
#ifdef DEBUG_PRINT_RUNS
printf(" Shape BiDi Run %d %d %s\n", p_run_start, p_run_end, hb_direction_to_string(p_run_direction));
#endif
//Find intersecting script runs in visual order
script_iter->reset(p_run_direction);
while (script_iter->next()) {
int32_t script_run_start = script_iter->get_start();
int32_t script_run_end = script_iter->get_end();
hb_script_t script_run_script = script_iter->get_script();
if ((script_run_start < p_run_end) && (script_run_end > p_run_start)) {
if (base_font.is_valid()) {
TLFontFallbackIterator font_iter = base_font->get_face_for_script(base_style, script_run_script);
if (language != HB_LANGUAGE_INVALID) {
TLFontFallbackIterator _iter = base_font->get_face_for_language(base_style, language);
if (_iter.is_linked()) {
font_iter = _iter;
}
}
if (!font_iter.is_valid()) {
_shape_hex_run(p_run_direction, p_run_start, p_run_end);
return;
}
/*
Ref<TLFontFace> _font = base_font->_get_liked_face_for_script(base_style, script_run_script);
if (_font.is_null()) {
_font = base_font->get_face(base_style);
if (_font.is_null()) {
_shape_hex_run(p_run_direction, p_run_start, p_run_end);
return;
}
}
*/
_shape_bidi_script_run(p_run_direction, script_run_script, MAX(script_run_start, p_run_start), MIN(script_run_end, p_run_end), font_iter);
} else {
_shape_hex_run(p_run_direction, p_run_start, p_run_end);
}
}
}
}
void TLShapedString::_shape_bidi_script_run(hb_direction_t p_run_direction, hb_script_t p_run_script, int32_t p_run_start, int32_t p_run_end, TLFontFallbackIterator p_font) {
//Shape monotone run using HarfBuzz
hb_font_t *hb_font = p_font.value()->get_hb_font(base_size);
if (!hb_font) {
if (p_font.next().is_valid()) {
_shape_bidi_script_run(p_run_direction, p_run_script, p_run_start, p_run_end, p_font.next());
} else {
_shape_hex_run(p_run_direction, p_run_start, p_run_end);
}
return;
}
hb_buffer_clear_contents(hb_buffer);
hb_buffer_set_direction(hb_buffer, p_run_direction);
if (preserve_control) {
hb_buffer_set_flags(hb_buffer, (hb_buffer_flags_t)(HB_BUFFER_FLAG_PRESERVE_DEFAULT_IGNORABLES | (p_run_start == 0 ? HB_BUFFER_FLAG_BOT : 0) | (p_run_end == data_size ? HB_BUFFER_FLAG_EOT : 0)));
} else {
hb_buffer_set_flags(hb_buffer, (hb_buffer_flags_t)(HB_BUFFER_FLAG_DEFAULT | (p_run_start == 0 ? HB_BUFFER_FLAG_BOT : 0) | (p_run_end == data_size ? HB_BUFFER_FLAG_EOT : 0)));
}
hb_buffer_set_script(hb_buffer, p_run_script);
if (language != HB_LANGUAGE_INVALID) hb_buffer_set_language(hb_buffer, language);
hb_buffer_add_utf16(hb_buffer, (const uint16_t *)data, data_size, p_run_start, p_run_end - p_run_start);
hb_shape(hb_font, hb_buffer, font_features.empty() ? NULL : &font_features[0], font_features.size());
//Compose grapheme clusters
std::vector<Cluster> run_clusters;
unsigned int glyph_count;
hb_glyph_info_t *glyph_info = hb_buffer_get_glyph_infos(hb_buffer, &glyph_count);
hb_glyph_position_t *glyph_pos = hb_buffer_get_glyph_positions(hb_buffer, &glyph_count);
if (glyph_count > 0) {
int64_t last_cluster_id = -1;
for (unsigned int i = 0; i < glyph_count; i++) {
if (glyph_info[i].cluster >= data_size) {
ERR_PRINTS("HarfBuzz return invalid cluster index");
ERR_FAIL_COND(true);
}
if (last_cluster_id != (int64_t)glyph_info[i].cluster) {
//Start new cluster
Cluster new_cluster;
//debug info
new_cluster.script = p_run_script;
new_cluster.dir = p_run_direction;
new_cluster.lang = language;
//debug info
new_cluster.font_face = p_font.value().ptr();
new_cluster.is_rtl = (p_run_direction == HB_DIRECTION_RTL);
new_cluster.cl_type = _CLUSTER_TYPE_TEXT;
new_cluster.glyphs.push_back(Glyph(glyph_info[i].codepoint, Point2((glyph_pos[i].x_offset) / 64, -(glyph_pos[i].y_offset / 64)), Point2((glyph_pos[i].x_advance * p_font.value()->get_glyph_scale(base_size)) / 64, ((glyph_pos[i].y_advance * p_font.value()->get_glyph_scale(base_size)) / 64))));
new_cluster.valid = ((glyph_info[i].codepoint != 0) || !u_isgraph(get_char(glyph_info[i].cluster)));
new_cluster.start = glyph_info[i].cluster;
new_cluster.end = glyph_info[i].cluster;
new_cluster.ascent = p_font.value()->get_ascent(base_size);
new_cluster.descent = p_font.value()->get_descent(base_size);
new_cluster.width += (glyph_pos[i].x_advance * p_font.value()->get_glyph_scale(base_size)) / 64;
//Set previous logical cluster end limit
if (i != 0) {
if (p_run_direction == HB_DIRECTION_LTR) {
run_clusters[run_clusters.size() - 1].end = glyph_info[i].cluster - 1;
} else {
new_cluster.end = run_clusters[run_clusters.size() - 1].start - 1;
}
}
run_clusters.push_back(new_cluster);
last_cluster_id = glyph_info[i].cluster;
} else {
//Add glyphs to existing cluster
run_clusters[run_clusters.size() - 1].glyphs.push_back(Glyph(glyph_info[i].codepoint, Point2((glyph_pos[i].x_offset) / 64, -(glyph_pos[i].y_offset / 64)), Point2((glyph_pos[i].x_advance * p_font.value()->get_glyph_scale(base_size)) / 64, ((glyph_pos[i].y_advance * p_font.value()->get_glyph_scale(base_size)) / 64))));
run_clusters[run_clusters.size() - 1].valid &= ((glyph_info[i].codepoint != 0) || !u_isgraph(get_char(glyph_info[i].cluster)));
run_clusters[run_clusters.size() - 1].width += (glyph_pos[i].x_advance * p_font.value()->get_glyph_scale(base_size)) / 64;
}
}
//Set last logical cluster end limit
if (run_clusters.size() > 0) {
if (p_run_direction == HB_DIRECTION_LTR) {
run_clusters[run_clusters.size() - 1].end = p_run_end - 1;
} else {
run_clusters[0].end = p_run_end - 1;
}
}
}
//Reshape sub-runs with invalid clusters using fallback fonts
if (run_clusters.size() > 0) {
int64_t failed_subrun_start = p_run_end + 1;
int64_t failed_subrun_end = p_run_start;
visual.reserve(visual.size() + run_clusters.size());
for (int64_t i = 0; i < (int64_t)run_clusters.size(); i++) {
if (run_clusters[i].valid) {
if (failed_subrun_start != p_run_end + 1) {
if (p_font.next().is_valid()) {
_shape_bidi_script_run(p_run_direction, p_run_script, failed_subrun_start, failed_subrun_end + 1, p_font.next());
} else {
_shape_hex_run(p_run_direction, failed_subrun_start, failed_subrun_end + 1);
}
failed_subrun_start = p_run_end + 1;
failed_subrun_end = p_run_start;
}
visual.push_back(run_clusters[i]);
} else {
if (failed_subrun_start >= run_clusters[i].start) failed_subrun_start = run_clusters[i].start;
if (failed_subrun_end <= run_clusters[i].end) failed_subrun_end = run_clusters[i].end;
}
}
if (failed_subrun_start != p_run_end + 1) {
if (p_font.next().is_valid()) {
_shape_bidi_script_run(p_run_direction, p_run_script, failed_subrun_start, failed_subrun_end + 1, p_font.next());
} else {
_shape_hex_run(p_run_direction, failed_subrun_start, failed_subrun_end + 1);
}
}
}
}
void TLShapedString::_shape_hex_run(hb_direction_t p_run_direction, int32_t p_run_start, int32_t p_run_end) {
visual.reserve(visual.size() + p_run_end - p_run_start);
//"Shape" monotone run using HexBox fallback
if (p_run_direction == HB_DIRECTION_LTR) {
int32_t i = p_run_start;
while (i < p_run_end) {
UChar32 c = get_char(i);
float w = (c <= 0xFF) ? 14 : ((c <= 0xFFFF) ? 20 : 26);
Cluster hex_cluster;
hex_cluster.cl_type = _CLUSTER_TYPE_HEX_BOX;
hex_cluster.is_rtl = (p_run_direction == HB_DIRECTION_RTL);
hex_cluster.valid = true;
hex_cluster.start = i;
hex_cluster.end = i;
hex_cluster.ascent = 15;
hex_cluster.descent = 5;
hex_cluster.width = w;
hex_cluster.glyphs.push_back(Glyph(c, Point2(0, 0), Point2(w, 0)));
visual.push_back(hex_cluster);
if (!U16_IS_SINGLE(data[i])) i++; //SKIP SURROGATE
i++;
}
} else {
int32_t i = p_run_end - 1;
while (i >= p_run_start) {
if (!U16_IS_SINGLE(data[i])) i--; //SKIP SURROGATE
UChar32 c = get_char(i);
float w = (c <= 0xFF) ? 14 : ((c <= 0xFFFF) ? 20 : 26);
Cluster hex_cluster;
hex_cluster.cl_type = _CLUSTER_TYPE_HEX_BOX;
hex_cluster.is_rtl = (p_run_direction == HB_DIRECTION_RTL);
hex_cluster.valid = true;
hex_cluster.start = i;
hex_cluster.end = i;
hex_cluster.ascent = 15;
hex_cluster.descent = 5;
hex_cluster.width = w;
hex_cluster.glyphs.push_back(Glyph(c, Point2(0, 0), Point2(w, 0)));
visual.push_back(hex_cluster);
i--;
}
}
}
int TLShapedString::get_base_direction() const {
return base_direction;
}
int TLShapedString::get_para_direction() const {
if (!valid)
const_cast<TLShapedString *>(this)->_shape_full_string();
if (!valid)
return TEXT_DIRECTION_INVALID;
return para_direction;
}
void TLShapedString::set_base_direction(int p_base_direction) {
if (p_base_direction < 0 || p_base_direction > TEXT_DIRECTION_AUTO)
return;
if (base_direction != (TextDirection)p_base_direction) {
base_direction = (TextDirection)p_base_direction;
_clear_props();
emit_signal("string_changed");
}
}
void TLShapedString::_font_changed() {
_clear_visual();
emit_signal("string_changed");
}
Ref<TLFontFamily> TLShapedString::get_base_font() const {
return base_font;
}
void TLShapedString::set_base_font(const Ref<TLFontFamily> p_font) {
if (!cast_to<TLFontFamily>(*p_font)) {
ERR_PRINTS("Type mismatch");
return;
}
if (base_font != p_font) {
if (base_font.is_valid() && base_font->is_connected(_CHANGED, this, "_font_changed")) {
base_font->disconnect(_CHANGED, this, "_font_changed");
}
base_font = p_font;
if (base_font.is_valid() && !base_font->is_connected(_CHANGED, this, "_font_changed")) {
base_font->connect(_CHANGED, this, "_font_changed");
}
_clear_visual();
emit_signal("string_changed");
}
}
String TLShapedString::get_base_font_style() const {
return base_style;
}
void TLShapedString::set_base_font_style(const String p_style) {
if (base_style != p_style) {
base_style = p_style;
_clear_visual();
emit_signal("string_changed");
}
}
int TLShapedString::get_base_font_size() const {
return base_size;
}
void TLShapedString::set_base_font_size(int p_size) {
if (base_size != p_size) {
base_size = p_size;
_clear_visual();
emit_signal("string_changed");
}
}
String TLShapedString::get_features() const {
String ret;
char _feature[255];
for (int64_t i = 0; i < (int64_t)font_features.size(); i++) {
hb_feature_to_string(const_cast<hb_feature_t *>(&font_features[i]), _feature, 255);
ret += String(_feature);
if (i != (int64_t)font_features.size() - 1) ret += String(",");
}
return ret;
}
void TLShapedString::set_features(const String p_features) {
#ifdef GODOT_MODULE
Vector<String> v_features = p_features.split(",");
#else
PoolStringArray v_features = p_features.split(",");
#endif
for (int64_t i = 0; i < (int64_t)v_features.size(); i++) {
hb_feature_t feature;
if (hb_feature_from_string(v_features[i].ascii().get_data(), -1, &feature)) {
//feature.start = 0;
//feature.end = (unsigned int)-1;
font_features.push_back(feature);
}
}
_clear_visual();
emit_signal("string_changed");
}
String TLShapedString::get_language() const {
return String(hb_language_to_string(language));
}
void TLShapedString::set_language(const String p_language) {
language = hb_language_from_string(p_language.ascii().get_data(), -1);
_clear_visual();
emit_signal("string_changed");
}
bool TLShapedString::get_preserve_control() const {
return preserve_control;
}
void TLShapedString::set_preserve_control(bool p_enable) {
if (preserve_control != p_enable) {
preserve_control = p_enable;
_clear_visual();
emit_signal("string_changed");
}
}
bool TLShapedString::shape() {
if (!valid)
_shape_full_string();
return valid;
}
bool TLShapedString::is_valid() const {
return valid;
}
bool TLShapedString::empty() const {
return data_size == 0;
}
int64_t TLShapedString::length() const {
return data_size;
}
int64_t TLShapedString::char_count() const {
return char_size;
}
float TLShapedString::get_ascent() const {
if (!valid)
const_cast<TLShapedString *>(this)->_shape_full_string();
if (!valid) {
if (base_font.is_valid()) {
TLFontFallbackIterator font_iter = base_font->get_face(base_style);
if (font_iter.is_valid()) {
Ref<TLFontFace> _font = font_iter.value();
if (_font.is_null()) {
return 0.0f;
}
return _font->get_ascent(base_size);
}
}
return 15.0f;
}
return ascent;
}
float TLShapedString::get_descent() const {
if (!valid)
const_cast<TLShapedString *>(this)->_shape_full_string();
if (!valid) {
if (base_font.is_valid()) {
TLFontFallbackIterator font_iter = base_font->get_face(base_style);
if (font_iter.is_valid()) {
Ref<TLFontFace> _font = font_iter.value();
if (_font.is_null()) {
return 0.0f;
}
return _font->get_descent(base_size);
}
}