diff options
Diffstat (limited to 'gfx/harfbuzz/src/OT/glyf/VarCompositeGlyph.hh')
| -rw-r--r-- | gfx/harfbuzz/src/OT/glyf/VarCompositeGlyph.hh | 401 |
1 files changed, 401 insertions, 0 deletions
diff --git a/gfx/harfbuzz/src/OT/glyf/VarCompositeGlyph.hh b/gfx/harfbuzz/src/OT/glyf/VarCompositeGlyph.hh new file mode 100644 index 0000000000..50cbece3ca --- /dev/null +++ b/gfx/harfbuzz/src/OT/glyf/VarCompositeGlyph.hh @@ -0,0 +1,401 @@ +#ifndef OT_GLYF_VARCOMPOSITEGLYPH_HH +#define OT_GLYF_VARCOMPOSITEGLYPH_HH + + +#include "../../hb-open-type.hh" +#include "coord-setter.hh" + + +namespace OT { +namespace glyf_impl { + + +struct VarCompositeGlyphRecord +{ + protected: + enum var_composite_glyph_flag_t + { + USE_MY_METRICS = 0x0001, + AXIS_INDICES_ARE_SHORT = 0x0002, + UNIFORM_SCALE = 0x0004, + HAVE_TRANSLATE_X = 0x0008, + HAVE_TRANSLATE_Y = 0x0010, + HAVE_ROTATION = 0x0020, + HAVE_SCALE_X = 0x0040, + HAVE_SCALE_Y = 0x0080, + HAVE_SKEW_X = 0x0100, + HAVE_SKEW_Y = 0x0200, + HAVE_TCENTER_X = 0x0400, + HAVE_TCENTER_Y = 0x0800, + GID_IS_24BIT = 0x1000, + AXES_HAVE_VARIATION = 0x2000, + RESET_UNSPECIFIED_AXES = 0x4000, + }; + + public: + + unsigned int get_size () const + { + unsigned fl = flags; + unsigned int size = min_size; + + unsigned axis_width = (fl & AXIS_INDICES_ARE_SHORT) ? 4 : 3; + size += numAxes * axis_width; + + if (fl & GID_IS_24BIT) size += 1; + + // 2 bytes each for the following flags + fl = fl & (HAVE_TRANSLATE_X | HAVE_TRANSLATE_Y | + HAVE_ROTATION | + HAVE_SCALE_X | HAVE_SCALE_Y | + HAVE_SKEW_X | HAVE_SKEW_Y | + HAVE_TCENTER_X | HAVE_TCENTER_Y); + size += hb_popcount (fl) * 2; + + return size; + } + + bool has_more () const { return true; } + + bool is_use_my_metrics () const { return flags & USE_MY_METRICS; } + bool is_reset_unspecified_axes () const { return flags & RESET_UNSPECIFIED_AXES; } + + hb_codepoint_t get_gid () const + { + if (flags & GID_IS_24BIT) + return * (const HBGlyphID24 *) &pad; + else + return * (const HBGlyphID16 *) &pad; + } + + void set_gid (hb_codepoint_t gid) + { + if (flags & GID_IS_24BIT) + * (HBGlyphID24 *) &pad = gid; + else + * (HBGlyphID16 *) &pad = gid; + } + + unsigned get_numAxes () const + { + return numAxes; + } + + unsigned get_num_points () const + { + unsigned fl = flags; + unsigned num = 0; + if (fl & AXES_HAVE_VARIATION) num += numAxes; + + /* Hopefully faster code, relying on the value of the flags. */ + fl = (((fl & (HAVE_TRANSLATE_Y | HAVE_SCALE_Y | HAVE_SKEW_Y | HAVE_TCENTER_Y)) >> 1) | fl) & + (HAVE_TRANSLATE_X | HAVE_ROTATION | HAVE_SCALE_X | HAVE_SKEW_X | HAVE_TCENTER_X); + num += hb_popcount (fl); + return num; + + /* Slower but more readable code. */ + if (fl & (HAVE_TRANSLATE_X | HAVE_TRANSLATE_Y)) num++; + if (fl & HAVE_ROTATION) num++; + if (fl & (HAVE_SCALE_X | HAVE_SCALE_Y)) num++; + if (fl & (HAVE_SKEW_X | HAVE_SKEW_Y)) num++; + if (fl & (HAVE_TCENTER_X | HAVE_TCENTER_Y)) num++; + return num; + } + + void transform_points (hb_array_t<const contour_point_t> record_points, + hb_array_t<contour_point_t> points) const + { + float matrix[4]; + contour_point_t trans; + + get_transformation_from_points (record_points.arrayZ, matrix, trans); + + auto arrayZ = points.arrayZ; + unsigned count = points.length; + + if (matrix[0] != 1.f || matrix[1] != 0.f || + matrix[2] != 0.f || matrix[3] != 1.f) + for (unsigned i = 0; i < count; i++) + arrayZ[i].transform (matrix); + + if (trans.x != 0.f || trans.y != 0.f) + for (unsigned i = 0; i < count; i++) + arrayZ[i].translate (trans); + } + + static inline void transform (float (&matrix)[4], contour_point_t &trans, + float (other)[6]) + { + // https://github.com/fonttools/fonttools/blob/f66ee05f71c8b57b5f519ee975e95edcd1466e14/Lib/fontTools/misc/transform.py#L268 + float xx1 = other[0]; + float xy1 = other[1]; + float yx1 = other[2]; + float yy1 = other[3]; + float dx1 = other[4]; + float dy1 = other[5]; + float xx2 = matrix[0]; + float xy2 = matrix[1]; + float yx2 = matrix[2]; + float yy2 = matrix[3]; + float dx2 = trans.x; + float dy2 = trans.y; + + matrix[0] = xx1*xx2 + xy1*yx2; + matrix[1] = xx1*xy2 + xy1*yy2; + matrix[2] = yx1*xx2 + yy1*yx2; + matrix[3] = yx1*xy2 + yy1*yy2; + trans.x = xx2*dx1 + yx2*dy1 + dx2; + trans.y = xy2*dx1 + yy2*dy1 + dy2; + } + + static void translate (float (&matrix)[4], contour_point_t &trans, + float translateX, float translateY) + { + if (!translateX && !translateY) + return; + + trans.x += matrix[0] * translateX + matrix[2] * translateY; + trans.y += matrix[1] * translateX + matrix[3] * translateY; + } + + static void scale (float (&matrix)[4], contour_point_t &trans, + float scaleX, float scaleY) + { + if (scaleX == 1.f && scaleY == 1.f) + return; + + matrix[0] *= scaleX; + matrix[1] *= scaleX; + matrix[2] *= scaleY; + matrix[3] *= scaleY; + } + + static void rotate (float (&matrix)[4], contour_point_t &trans, + float rotation) + { + if (!rotation) + return; + + // https://github.com/fonttools/fonttools/blob/f66ee05f71c8b57b5f519ee975e95edcd1466e14/Lib/fontTools/misc/transform.py#L240 + rotation = rotation * HB_PI; + float c; + float s; +#ifdef HAVE_SINCOSF + sincosf (rotation, &s, &c); +#else + c = cosf (rotation); + s = sinf (rotation); +#endif + float other[6] = {c, s, -s, c, 0.f, 0.f}; + transform (matrix, trans, other); + } + + static void skew (float (&matrix)[4], contour_point_t &trans, + float skewX, float skewY) + { + if (!skewX && !skewY) + return; + + // https://github.com/fonttools/fonttools/blob/f66ee05f71c8b57b5f519ee975e95edcd1466e14/Lib/fontTools/misc/transform.py#L255 + skewX = skewX * HB_PI; + skewY = skewY * HB_PI; + float other[6] = {1.f, + skewY ? tanf (skewY) : 0.f, + skewX ? tanf (skewX) : 0.f, + 1.f, + 0.f, 0.f}; + transform (matrix, trans, other); + } + + bool get_points (contour_point_vector_t &points) const + { + unsigned num_points = get_num_points (); + + points.alloc (points.length + num_points + 4); // For phantom points + if (unlikely (!points.resize (points.length + num_points, false))) return false; + contour_point_t *rec_points = points.arrayZ + (points.length - num_points); + hb_memset (rec_points, 0, num_points * sizeof (rec_points[0])); + + unsigned fl = flags; + + unsigned num_axes = numAxes; + unsigned axis_width = (fl & AXIS_INDICES_ARE_SHORT) ? 2 : 1; + unsigned axes_size = num_axes * axis_width; + + const F2DOT14 *q = (const F2DOT14 *) (axes_size + + (fl & GID_IS_24BIT ? 3 : 2) + + (const HBUINT8 *) &pad); + + unsigned count = num_axes; + if (fl & AXES_HAVE_VARIATION) + { + for (unsigned i = 0; i < count; i++) + rec_points++->x = q++->to_int (); + } + else + q += count; + + const HBUINT16 *p = (const HBUINT16 *) q; + + if (fl & (HAVE_TRANSLATE_X | HAVE_TRANSLATE_Y)) + { + int translateX = (fl & HAVE_TRANSLATE_X) ? * (const FWORD *) p++ : 0; + int translateY = (fl & HAVE_TRANSLATE_Y) ? * (const FWORD *) p++ : 0; + rec_points->x = translateX; + rec_points->y = translateY; + rec_points++; + } + if (fl & HAVE_ROTATION) + { + int rotation = (fl & HAVE_ROTATION) ? ((const F4DOT12 *) p++)->to_int () : 0; + rec_points->x = rotation; + rec_points++; + } + if (fl & (HAVE_SCALE_X | HAVE_SCALE_Y)) + { + int scaleX = (fl & HAVE_SCALE_X) ? ((const F6DOT10 *) p++)->to_int () : 1 << 10; + int scaleY = (fl & HAVE_SCALE_Y) ? ((const F6DOT10 *) p++)->to_int () : 1 << 10; + if ((fl & UNIFORM_SCALE) && !(fl & HAVE_SCALE_Y)) + scaleY = scaleX; + rec_points->x = scaleX; + rec_points->y = scaleY; + rec_points++; + } + if (fl & (HAVE_SKEW_X | HAVE_SKEW_Y)) + { + int skewX = (fl & HAVE_SKEW_X) ? ((const F4DOT12 *) p++)->to_int () : 0; + int skewY = (fl & HAVE_SKEW_Y) ? ((const F4DOT12 *) p++)->to_int () : 0; + rec_points->x = skewX; + rec_points->y = skewY; + rec_points++; + } + if (fl & (HAVE_TCENTER_X | HAVE_TCENTER_Y)) + { + int tCenterX = (fl & HAVE_TCENTER_X) ? * (const FWORD *) p++ : 0; + int tCenterY = (fl & HAVE_TCENTER_Y) ? * (const FWORD *) p++ : 0; + rec_points->x = tCenterX; + rec_points->y = tCenterY; + rec_points++; + } + + return true; + } + + void get_transformation_from_points (const contour_point_t *rec_points, + float (&matrix)[4], contour_point_t &trans) const + { + unsigned fl = flags; + + if (fl & AXES_HAVE_VARIATION) + rec_points += numAxes; + + matrix[0] = matrix[3] = 1.f; + matrix[1] = matrix[2] = 0.f; + trans.init (0.f, 0.f); + + float translateX = 0.f; + float translateY = 0.f; + float rotation = 0.f; + float scaleX = 1.f; + float scaleY = 1.f; + float skewX = 0.f; + float skewY = 0.f; + float tCenterX = 0.f; + float tCenterY = 0.f; + + if (fl & (HAVE_TRANSLATE_X | HAVE_TRANSLATE_Y)) + { + translateX = rec_points->x; + translateY = rec_points->y; + rec_points++; + } + if (fl & HAVE_ROTATION) + { + rotation = rec_points->x / (1 << 12); + rec_points++; + } + if (fl & (HAVE_SCALE_X | HAVE_SCALE_Y)) + { + scaleX = rec_points->x / (1 << 10); + scaleY = rec_points->y / (1 << 10); + rec_points++; + } + if (fl & (HAVE_SKEW_X | HAVE_SKEW_Y)) + { + skewX = rec_points->x / (1 << 12); + skewY = rec_points->y / (1 << 12); + rec_points++; + } + if (fl & (HAVE_TCENTER_X | HAVE_TCENTER_Y)) + { + tCenterX = rec_points->x; + tCenterY = rec_points->y; + rec_points++; + } + + translate (matrix, trans, translateX + tCenterX, translateY + tCenterY); + rotate (matrix, trans, rotation); + scale (matrix, trans, scaleX, scaleY); + skew (matrix, trans, -skewX, skewY); + translate (matrix, trans, -tCenterX, -tCenterY); + } + + void set_variations (coord_setter_t &setter, + hb_array_t<contour_point_t> rec_points) const + { + bool have_variations = flags & AXES_HAVE_VARIATION; + unsigned axis_width = (flags & AXIS_INDICES_ARE_SHORT) ? 2 : 1; + unsigned num_axes = numAxes; + + const HBUINT8 *p = (const HBUINT8 *) (((HBUINT8 *) &numAxes) + numAxes.static_size + (flags & GID_IS_24BIT ? 3 : 2)); + const HBUINT16 *q = (const HBUINT16 *) (((HBUINT8 *) &numAxes) + numAxes.static_size + (flags & GID_IS_24BIT ? 3 : 2)); + + const F2DOT14 *a = (const F2DOT14 *) ((HBUINT8 *) (axis_width == 1 ? (p + num_axes) : (HBUINT8 *) (q + num_axes))); + + unsigned count = num_axes; + for (unsigned i = 0; i < count; i++) + { + unsigned axis_index = axis_width == 1 ? (unsigned) *p++ : (unsigned) *q++; + + signed v = have_variations ? rec_points.arrayZ[i].x : a++->to_int (); + + v = hb_clamp (v, -(1<<14), (1<<14)); + setter[axis_index] = v; + } + } + + protected: + HBUINT16 flags; + HBUINT8 numAxes; + HBUINT16 pad; + public: + DEFINE_SIZE_MIN (5); +}; + +using var_composite_iter_t = composite_iter_tmpl<VarCompositeGlyphRecord>; + +struct VarCompositeGlyph +{ + const GlyphHeader &header; + hb_bytes_t bytes; + VarCompositeGlyph (const GlyphHeader &header_, hb_bytes_t bytes_) : + header (header_), bytes (bytes_) {} + + var_composite_iter_t iter () const + { return var_composite_iter_t (bytes, &StructAfter<VarCompositeGlyphRecord, GlyphHeader> (header)); } + + const hb_bytes_t trim_padding () const + { + unsigned length = GlyphHeader::static_size; + for (auto &comp : iter ()) + length += comp.get_size (); + return bytes.sub_array (0, length); + } +}; + + +} /* namespace glyf_impl */ +} /* namespace OT */ + + +#endif /* OT_GLYF_VARCOMPOSITEGLYPH_HH */ |