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[TextServer / Font] Add support for customizable baseline offset. #87668

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Jan 29, 2024
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[TextServer / Font] Add support for customizable baseline offset. #87668

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1 change: 1 addition & 0 deletions doc/classes/Font.xml
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Expand Up @@ -118,6 +118,7 @@
<param index="5" name="spacing_bottom" type="int" default="0" />
<param index="6" name="spacing_space" type="int" default="0" />
<param index="7" name="spacing_glyph" type="int" default="0" />
<param index="8" name="baseline_offset" type="float" default="0.0" />
<description>
Returns [TextServer] RID of the font cache for specific variation.
</description>
Expand Down
15 changes: 15 additions & 0 deletions doc/classes/FontFile.xml
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Expand Up @@ -131,6 +131,13 @@
Returns embolden strength, if is not equal to zero, emboldens the font outlines. Negative values reduce the outline thickness.
</description>
</method>
<method name="get_extra_baseline_offset" qualifiers="const">
<return type="float" />
<param index="0" name="cache_index" type="int" />
<description>
Returns extra baseline offset (as a fraction of font height).
</description>
</method>
<method name="get_extra_spacing" qualifiers="const">
<return type="int" />
<param index="0" name="cache_index" type="int" />
Expand Down Expand Up @@ -445,6 +452,14 @@
Sets embolden strength, if is not equal to zero, emboldens the font outlines. Negative values reduce the outline thickness.
</description>
</method>
<method name="set_extra_baseline_offset">
<return type="void" />
<param index="0" name="cache_index" type="int" />
<param index="1" name="baseline_offset" type="float" />
<description>
Sets extra baseline offset (as a fraction of font height).
</description>
</method>
<method name="set_extra_spacing">
<return type="void" />
<param index="0" name="cache_index" type="int" />
Expand Down
3 changes: 3 additions & 0 deletions doc/classes/FontVariation.xml
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Expand Up @@ -46,6 +46,9 @@
<member name="base_font" type="Font" setter="set_base_font" getter="get_base_font">
Base font used to create a variation. If not set, default [Theme] font is used.
</member>
<member name="baseline_offset" type="float" setter="set_baseline_offset" getter="get_baseline_offset" default="0.0">
Extra baseline offset (as a fraction of font height).
</member>
<member name="opentype_features" type="Dictionary" setter="set_opentype_features" getter="get_opentype_features" default="{}">
A set of OpenType feature tags. More info: [url=https://docs.microsoft.com/en-us/typography/opentype/spec/featuretags]OpenType feature tags[/url].
</member>
Expand Down
15 changes: 15 additions & 0 deletions doc/classes/TextServer.xml
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Expand Up @@ -120,6 +120,13 @@
Returns the font ascent (number of pixels above the baseline).
</description>
</method>
<method name="font_get_baseline_offset" qualifiers="const">
<return type="float" />
<param index="0" name="font_rid" type="RID" />
<description>
Returns extra baseline offset (as a fraction of font height).
</description>
</method>
<method name="font_get_char_from_glyph_index" qualifiers="const">
<return type="int" />
<param index="0" name="font_rid" type="RID" />
Expand Down Expand Up @@ -640,6 +647,14 @@
Sets the font ascent (number of pixels above the baseline).
</description>
</method>
<method name="font_set_baseline_offset">
<return type="void" />
<param index="0" name="font_rid" type="RID" />
<param index="1" name="baseline_offset" type="float" />
<description>
Sets extra baseline offset (as a fraction of font height).
</description>
</method>
<method name="font_set_data">
<return type="void" />
<param index="0" name="font_rid" type="RID" />
Expand Down
13 changes: 13 additions & 0 deletions doc/classes/TextServerExtension.xml
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Expand Up @@ -105,6 +105,12 @@
<description>
</description>
</method>
<method name="_font_get_baseline_offset" qualifiers="virtual const">
<return type="float" />
<param index="0" name="font_rid" type="RID" />
<description>
</description>
</method>
<method name="_font_get_char_from_glyph_index" qualifiers="virtual const">
<return type="int" />
<param index="0" name="font_rid" type="RID" />
Expand Down Expand Up @@ -552,6 +558,13 @@
<description>
</description>
</method>
<method name="_font_set_baseline_offset" qualifiers="virtual">
<return type="void" />
<param index="0" name="font_rid" type="RID" />
<param index="1" name="baseline_offset" type="float" />
<description>
</description>
</method>
<method name="_font_set_data" qualifiers="virtual">
<return type="void" />
<param index="0" name="font_rid" type="RID" />
Expand Down
2 changes: 1 addition & 1 deletion misc/extension_api_validation/4.1-stable_4.2-stable.expected
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Expand Up @@ -91,7 +91,7 @@ Added optional argument. Compatibility methods registered.

GH-80954
--------
Validate extension JSON: Error: Field 'classes/Font/methods/find_variation/arguments': size changed value in new API, from 4 to 8.
Validate extension JSON: Error: Field 'classes/Font/methods/find_variation/arguments': size changed value in new API, from 4 to 9.

Added optional arguments. Compatibility method registered.

Expand Down
7 changes: 7 additions & 0 deletions misc/extension_api_validation/4.2-stable.expected
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Expand Up @@ -66,3 +66,10 @@ GH-86158
Validate extension JSON: Error: Field 'classes/GraphEdit/methods/get_connection_line': is_const changed value in new API, from false to true.

get_connection_line was made const.


GH-87668
--------
Validate extension JSON: Error: Field 'classes/Font/methods/find_variation/arguments': size changed value in new API, from 8 to 9.

Added optional "baseline_offset" argument. Compatibility method registered.
41 changes: 41 additions & 0 deletions modules/text_server_adv/text_server_adv.cpp
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Expand Up @@ -2409,6 +2409,37 @@ int64_t TextServerAdvanced::_font_get_spacing(const RID &p_font_rid, SpacingType
}
}

void TextServerAdvanced::_font_set_baseline_offset(const RID &p_font_rid, float p_baseline_offset) {
FontAdvancedLinkedVariation *fdv = font_var_owner.get_or_null(p_font_rid);
if (fdv) {
if (fdv->baseline_offset != p_baseline_offset) {
fdv->baseline_offset = p_baseline_offset;
}
} else {
FontAdvanced *fd = font_owner.get_or_null(p_font_rid);
ERR_FAIL_NULL(fd);

MutexLock lock(fd->mutex);
if (fd->baseline_offset != p_baseline_offset) {
_font_clear_cache(fd);
fd->baseline_offset = p_baseline_offset;
}
}
}

float TextServerAdvanced::_font_get_baseline_offset(const RID &p_font_rid) const {
FontAdvancedLinkedVariation *fdv = font_var_owner.get_or_null(p_font_rid);
if (fdv) {
return fdv->baseline_offset;
} else {
FontAdvanced *fd = font_owner.get_or_null(p_font_rid);
ERR_FAIL_NULL_V(fd, 0.0);

MutexLock lock(fd->mutex);
return fd->baseline_offset;
}
}

void TextServerAdvanced::_font_set_transform(const RID &p_font_rid, const Transform2D &p_transform) {
FontAdvanced *fd = _get_font_data(p_font_rid);
ERR_FAIL_NULL(fd);
Expand Down Expand Up @@ -5750,6 +5781,11 @@ Glyph TextServerAdvanced::_shape_single_glyph(ShapedTextDataAdvanced *p_sd, char
gl.x_off = Math::round((double)glyph_pos[0].x_offset / (64.0 / scale));
}
gl.y_off = -Math::round((double)glyph_pos[0].y_offset / (64.0 / scale));
if (p_sd->orientation == ORIENTATION_HORIZONTAL) {
gl.y_off += _font_get_baseline_offset(gl.font_rid) * (double)(_font_get_ascent(gl.font_rid, gl.font_size) + _font_get_descent(gl.font_rid, gl.font_size));
} else {
gl.x_off += _font_get_baseline_offset(gl.font_rid) * (double)(_font_get_ascent(gl.font_rid, gl.font_size) + _font_get_descent(gl.font_rid, gl.font_size));
}

if ((glyph_info[0].codepoint != 0) || !u_isgraph(p_char)) {
gl.flags |= GRAPHEME_IS_VALID;
Expand Down Expand Up @@ -5964,6 +6000,11 @@ void TextServerAdvanced::_shape_run(ShapedTextDataAdvanced *p_sd, int64_t p_star
gl.x_off = Math::round((double)glyph_pos[i].x_offset / (64.0 / scale));
}
gl.y_off = -Math::round((double)glyph_pos[i].y_offset / (64.0 / scale));
if (p_sd->orientation == ORIENTATION_HORIZONTAL) {
gl.y_off += _font_get_baseline_offset(gl.font_rid) * (double)(_font_get_ascent(gl.font_rid, gl.font_size) + _font_get_descent(gl.font_rid, gl.font_size));
} else {
gl.x_off += _font_get_baseline_offset(gl.font_rid) * (double)(_font_get_ascent(gl.font_rid, gl.font_size) + _font_get_descent(gl.font_rid, gl.font_size));
}
}
if (!last_run || i < glyph_count - 1) {
// Do not add extra spacing to the last glyph of the string.
Expand Down
11 changes: 9 additions & 2 deletions modules/text_server_adv/text_server_adv.h
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Expand Up @@ -297,6 +297,7 @@ class TextServerAdvanced : public TextServerExtension {
struct FontAdvancedLinkedVariation {
RID base_font;
int extra_spacing[4] = { 0, 0, 0, 0 };
float baseline_offset = 0.0;
};

struct FontAdvanced {
Expand Down Expand Up @@ -324,6 +325,7 @@ class TextServerAdvanced : public TextServerExtension {
int weight = 400;
int stretch = 100;
int extra_spacing[4] = { 0, 0, 0, 0 };
float baseline_offset = 0.0;

HashMap<Vector2i, FontForSizeAdvanced *, VariantHasher, VariantComparator> cache;

Expand Down Expand Up @@ -574,9 +576,10 @@ class TextServerAdvanced : public TextServerExtension {
double embolden = 0.0;
Transform2D transform;
int extra_spacing[4] = { 0, 0, 0, 0 };
float baseline_offset = 0.0;

bool operator==(const SystemFontKey &p_b) const {
return (font_name == p_b.font_name) && (antialiasing == p_b.antialiasing) && (italic == p_b.italic) && (mipmaps == p_b.mipmaps) && (msdf == p_b.msdf) && (force_autohinter == p_b.force_autohinter) && (weight == p_b.weight) && (stretch == p_b.stretch) && (msdf_range == p_b.msdf_range) && (msdf_source_size == p_b.msdf_source_size) && (fixed_size == p_b.fixed_size) && (hinting == p_b.hinting) && (subpixel_positioning == p_b.subpixel_positioning) && (variation_coordinates == p_b.variation_coordinates) && (oversampling == p_b.oversampling) && (embolden == p_b.embolden) && (transform == p_b.transform) && (extra_spacing[SPACING_TOP] == p_b.extra_spacing[SPACING_TOP]) && (extra_spacing[SPACING_BOTTOM] == p_b.extra_spacing[SPACING_BOTTOM]) && (extra_spacing[SPACING_SPACE] == p_b.extra_spacing[SPACING_SPACE]) && (extra_spacing[SPACING_GLYPH] == p_b.extra_spacing[SPACING_GLYPH]);
return (font_name == p_b.font_name) && (antialiasing == p_b.antialiasing) && (italic == p_b.italic) && (mipmaps == p_b.mipmaps) && (msdf == p_b.msdf) && (force_autohinter == p_b.force_autohinter) && (weight == p_b.weight) && (stretch == p_b.stretch) && (msdf_range == p_b.msdf_range) && (msdf_source_size == p_b.msdf_source_size) && (fixed_size == p_b.fixed_size) && (hinting == p_b.hinting) && (subpixel_positioning == p_b.subpixel_positioning) && (variation_coordinates == p_b.variation_coordinates) && (oversampling == p_b.oversampling) && (embolden == p_b.embolden) && (transform == p_b.transform) && (extra_spacing[SPACING_TOP] == p_b.extra_spacing[SPACING_TOP]) && (extra_spacing[SPACING_BOTTOM] == p_b.extra_spacing[SPACING_BOTTOM]) && (extra_spacing[SPACING_SPACE] == p_b.extra_spacing[SPACING_SPACE]) && (extra_spacing[SPACING_GLYPH] == p_b.extra_spacing[SPACING_GLYPH]) && (baseline_offset == p_b.baseline_offset);
}

SystemFontKey(const String &p_font_name, bool p_italic, int p_weight, int p_stretch, RID p_font, const TextServerAdvanced *p_fb) {
Expand All @@ -601,6 +604,7 @@ class TextServerAdvanced : public TextServerExtension {
extra_spacing[SPACING_BOTTOM] = p_fb->_font_get_spacing(p_font, SPACING_BOTTOM);
extra_spacing[SPACING_SPACE] = p_fb->_font_get_spacing(p_font, SPACING_SPACE);
extra_spacing[SPACING_GLYPH] = p_fb->_font_get_spacing(p_font, SPACING_GLYPH);
baseline_offset = p_fb->_font_get_baseline_offset(p_font);
}
};

Expand Down Expand Up @@ -633,7 +637,7 @@ class TextServerAdvanced : public TextServerExtension {
hash = hash_murmur3_one_32(p_a.extra_spacing[SPACING_BOTTOM], hash);
hash = hash_murmur3_one_32(p_a.extra_spacing[SPACING_SPACE], hash);
hash = hash_murmur3_one_32(p_a.extra_spacing[SPACING_GLYPH], hash);

hash = hash_murmur3_one_double(p_a.baseline_offset, hash);
return hash_fmix32(hash_murmur3_one_32(((int)p_a.mipmaps) | ((int)p_a.msdf << 1) | ((int)p_a.italic << 2) | ((int)p_a.force_autohinter << 3) | ((int)p_a.hinting << 4) | ((int)p_a.subpixel_positioning << 8) | ((int)p_a.antialiasing << 12), hash));
}
};
Expand Down Expand Up @@ -781,6 +785,9 @@ class TextServerAdvanced : public TextServerExtension {
MODBIND3(font_set_spacing, const RID &, SpacingType, int64_t);
MODBIND2RC(int64_t, font_get_spacing, const RID &, SpacingType);

MODBIND2(font_set_baseline_offset, const RID &, float);
MODBIND1RC(float, font_get_baseline_offset, const RID &);

MODBIND2(font_set_transform, const RID &, const Transform2D &);
MODBIND1RC(Transform2D, font_get_transform, const RID &);

Expand Down
35 changes: 33 additions & 2 deletions modules/text_server_fb/text_server_fb.cpp
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Expand Up @@ -1403,6 +1403,37 @@ int64_t TextServerFallback::_font_get_spacing(const RID &p_font_rid, SpacingType
}
}

void TextServerFallback::_font_set_baseline_offset(const RID &p_font_rid, float p_baseline_offset) {
FontFallbackLinkedVariation *fdv = font_var_owner.get_or_null(p_font_rid);
if (fdv) {
if (fdv->baseline_offset != p_baseline_offset) {
fdv->baseline_offset = p_baseline_offset;
}
} else {
FontFallback *fd = font_owner.get_or_null(p_font_rid);
ERR_FAIL_NULL(fd);

MutexLock lock(fd->mutex);
if (fd->baseline_offset != p_baseline_offset) {
_font_clear_cache(fd);
fd->baseline_offset = p_baseline_offset;
}
}
}

float TextServerFallback::_font_get_baseline_offset(const RID &p_font_rid) const {
FontFallbackLinkedVariation *fdv = font_var_owner.get_or_null(p_font_rid);
if (fdv) {
return fdv->baseline_offset;
} else {
FontFallback *fd = font_owner.get_or_null(p_font_rid);
ERR_FAIL_NULL_V(fd, 0.0);

MutexLock lock(fd->mutex);
return fd->baseline_offset;
}
}

void TextServerFallback::_font_set_transform(const RID &p_font_rid, const Transform2D &p_transform) {
FontFallback *fd = _get_font_data(p_font_rid);
ERR_FAIL_NULL(fd);
Expand Down Expand Up @@ -4105,12 +4136,12 @@ bool TextServerFallback::_shaped_text_shape(const RID &p_shaped) {
if (sd->orientation == ORIENTATION_HORIZONTAL) {
gl.advance = _font_get_glyph_advance(gl.font_rid, gl.font_size, gl.index).x;
gl.x_off = 0;
gl.y_off = 0;
gl.y_off = _font_get_baseline_offset(gl.font_rid) * (double)(_font_get_ascent(gl.font_rid, gl.font_size) + _font_get_descent(gl.font_rid, gl.font_size));
sd->ascent = MAX(sd->ascent, _font_get_ascent(gl.font_rid, gl.font_size) + _font_get_spacing(gl.font_rid, SPACING_TOP));
sd->descent = MAX(sd->descent, _font_get_descent(gl.font_rid, gl.font_size) + _font_get_spacing(gl.font_rid, SPACING_BOTTOM));
} else {
gl.advance = _font_get_glyph_advance(gl.font_rid, gl.font_size, gl.index).y;
gl.x_off = -Math::round(_font_get_glyph_advance(gl.font_rid, gl.font_size, gl.index).x * 0.5);
gl.x_off = -Math::round(_font_get_glyph_advance(gl.font_rid, gl.font_size, gl.index).x * 0.5) + _font_get_baseline_offset(gl.font_rid) * (double)(_font_get_ascent(gl.font_rid, gl.font_size) + _font_get_descent(gl.font_rid, gl.font_size));
gl.y_off = _font_get_ascent(gl.font_rid, gl.font_size);
sd->ascent = MAX(sd->ascent, Math::round(_font_get_glyph_advance(gl.font_rid, gl.font_size, gl.index).x * 0.5));
sd->descent = MAX(sd->descent, Math::round(_font_get_glyph_advance(gl.font_rid, gl.font_size, gl.index).x * 0.5));
Expand Down
10 changes: 9 additions & 1 deletion modules/text_server_fb/text_server_fb.h
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Expand Up @@ -248,6 +248,7 @@ class TextServerFallback : public TextServerExtension {
struct FontFallbackLinkedVariation {
RID base_font;
int extra_spacing[4] = { 0, 0, 0, 0 };
float baseline_offset = 0.0;
};

struct FontFallback {
Expand Down Expand Up @@ -275,6 +276,7 @@ class TextServerFallback : public TextServerExtension {
int weight = 400;
int stretch = 100;
int extra_spacing[4] = { 0, 0, 0, 0 };
float baseline_offset = 0.0;

HashMap<Vector2i, FontForSizeFallback *, VariantHasher, VariantComparator> cache;

Expand Down Expand Up @@ -490,9 +492,10 @@ class TextServerFallback : public TextServerExtension {
double embolden = 0.0;
Transform2D transform;
int extra_spacing[4] = { 0, 0, 0, 0 };
float baseline_offset = 0.0;

bool operator==(const SystemFontKey &p_b) const {
return (font_name == p_b.font_name) && (antialiasing == p_b.antialiasing) && (italic == p_b.italic) && (mipmaps == p_b.mipmaps) && (msdf == p_b.msdf) && (force_autohinter == p_b.force_autohinter) && (weight == p_b.weight) && (stretch == p_b.stretch) && (msdf_range == p_b.msdf_range) && (msdf_source_size == p_b.msdf_source_size) && (fixed_size == p_b.fixed_size) && (hinting == p_b.hinting) && (subpixel_positioning == p_b.subpixel_positioning) && (variation_coordinates == p_b.variation_coordinates) && (oversampling == p_b.oversampling) && (embolden == p_b.embolden) && (transform == p_b.transform) && (extra_spacing[SPACING_TOP] == p_b.extra_spacing[SPACING_TOP]) && (extra_spacing[SPACING_BOTTOM] == p_b.extra_spacing[SPACING_BOTTOM]) && (extra_spacing[SPACING_SPACE] == p_b.extra_spacing[SPACING_SPACE]) && (extra_spacing[SPACING_GLYPH] == p_b.extra_spacing[SPACING_GLYPH]);
return (font_name == p_b.font_name) && (antialiasing == p_b.antialiasing) && (italic == p_b.italic) && (mipmaps == p_b.mipmaps) && (msdf == p_b.msdf) && (force_autohinter == p_b.force_autohinter) && (weight == p_b.weight) && (stretch == p_b.stretch) && (msdf_range == p_b.msdf_range) && (msdf_source_size == p_b.msdf_source_size) && (fixed_size == p_b.fixed_size) && (hinting == p_b.hinting) && (subpixel_positioning == p_b.subpixel_positioning) && (variation_coordinates == p_b.variation_coordinates) && (oversampling == p_b.oversampling) && (embolden == p_b.embolden) && (transform == p_b.transform) && (extra_spacing[SPACING_TOP] == p_b.extra_spacing[SPACING_TOP]) && (extra_spacing[SPACING_BOTTOM] == p_b.extra_spacing[SPACING_BOTTOM]) && (extra_spacing[SPACING_SPACE] == p_b.extra_spacing[SPACING_SPACE]) && (extra_spacing[SPACING_GLYPH] == p_b.extra_spacing[SPACING_GLYPH]) && (baseline_offset == p_b.baseline_offset);
}

SystemFontKey(const String &p_font_name, bool p_italic, int p_weight, int p_stretch, RID p_font, const TextServerFallback *p_fb) {
Expand All @@ -517,6 +520,7 @@ class TextServerFallback : public TextServerExtension {
extra_spacing[SPACING_BOTTOM] = p_fb->_font_get_spacing(p_font, SPACING_BOTTOM);
extra_spacing[SPACING_SPACE] = p_fb->_font_get_spacing(p_font, SPACING_SPACE);
extra_spacing[SPACING_GLYPH] = p_fb->_font_get_spacing(p_font, SPACING_GLYPH);
baseline_offset = p_fb->_font_get_baseline_offset(p_font);
}
};

Expand Down Expand Up @@ -549,6 +553,7 @@ class TextServerFallback : public TextServerExtension {
hash = hash_murmur3_one_32(p_a.extra_spacing[SPACING_BOTTOM], hash);
hash = hash_murmur3_one_32(p_a.extra_spacing[SPACING_SPACE], hash);
hash = hash_murmur3_one_32(p_a.extra_spacing[SPACING_GLYPH], hash);
hash = hash_murmur3_one_double(p_a.baseline_offset, hash);
return hash_fmix32(hash_murmur3_one_32(((int)p_a.mipmaps) | ((int)p_a.msdf << 1) | ((int)p_a.italic << 2) | ((int)p_a.force_autohinter << 3) | ((int)p_a.hinting << 4) | ((int)p_a.subpixel_positioning << 8) | ((int)p_a.antialiasing << 12), hash));
}
};
Expand Down Expand Up @@ -648,6 +653,9 @@ class TextServerFallback : public TextServerExtension {
MODBIND3(font_set_spacing, const RID &, SpacingType, int64_t);
MODBIND2RC(int64_t, font_get_spacing, const RID &, SpacingType);

MODBIND2(font_set_baseline_offset, const RID &, float);
MODBIND1RC(float, font_get_baseline_offset, const RID &);

MODBIND2(font_set_transform, const RID &, const Transform2D &);
MODBIND1RC(Transform2D, font_get_transform, const RID &);

Expand Down
7 changes: 6 additions & 1 deletion scene/resources/font.compat.inc
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Expand Up @@ -31,11 +31,16 @@
#ifndef DISABLE_DEPRECATED

RID Font::_find_variation_compat_80954(const Dictionary &p_variation_coordinates, int p_face_index, float p_strength, Transform2D p_transform) const {
return find_variation(p_variation_coordinates, p_face_index, p_strength, p_transform, 0, 0, 0, 0);
return find_variation(p_variation_coordinates, p_face_index, p_strength, p_transform, 0, 0, 0, 0, 0.0);
}

RID Font::_find_variation_compat_87668(const Dictionary &p_variation_coordinates, int p_face_index, float p_strength, Transform2D p_transform, int p_spacing_top, int p_spacing_bottom, int p_spacing_space, int p_spacing_glyph) const {
return find_variation(p_variation_coordinates, p_face_index, p_strength, p_transform, p_spacing_top, p_spacing_bottom, p_spacing_space, p_spacing_glyph, 0.0);
}

void Font::_bind_compatibility_methods() {
ClassDB::bind_compatibility_method(D_METHOD("find_variation", "variation_coordinates", "face_index", "strength", "transform"), &Font::_find_variation_compat_80954, DEFVAL(0), DEFVAL(0.0), DEFVAL(Transform2D()));
ClassDB::bind_compatibility_method(D_METHOD("find_variation", "variation_coordinates", "face_index", "strength", "transform", "spacing_top", "spacing_bottom", "spacing_space", "spacing_glyph"), &Font::_find_variation_compat_87668, DEFVAL(0), DEFVAL(0.0), DEFVAL(Transform2D()), DEFVAL(0), DEFVAL(0), DEFVAL(0), DEFVAL(0));
}

#endif
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