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/*
* Copyright © 2018 Ebrahim Byagowi
* Copyright © 2020 Google, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and its documentation for any purpose, provided that the
* above copyright notice and the following two paragraphs appear in
* all copies of this software.
*
* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* Google Author(s): Calder Kitagawa
*/
#ifndef HB_OT_COLOR_COLR_TABLE_HH
#define HB_OT_COLOR_COLR_TABLE_HH
#include "hb-open-type.hh"
#include "hb-ot-layout-common.hh"
/*
* COLR -- Color
* https://docs.microsoft.com/en-us/typography/opentype/spec/colr
*/
#define HB_OT_TAG_COLR HB_TAG('C','O','L','R')
namespace OT {
struct COLR;
struct hb_colrv1_closure_context_t :
hb_dispatch_context_t<hb_colrv1_closure_context_t>
{
template <typename T>
return_t dispatch (const T &obj)
{
if (paint_visited (&obj))
return hb_empty_t ();
obj.closurev1 (this);
return hb_empty_t ();
}
static return_t default_return_value () { return hb_empty_t (); }
bool paint_visited (const void *paint)
{
hb_codepoint_t delta = (hb_codepoint_t) ((uintptr_t) paint - (uintptr_t) base);
if (visited_paint.has (delta))
return true;
visited_paint.add (delta);
return false;
}
const COLR* get_colr_table () const
{ return reinterpret_cast<const COLR *> (base); }
void add_glyph (unsigned glyph_id)
{ glyphs->add (glyph_id); }
void add_layer_indices (unsigned first_layer_index, unsigned num_of_layers)
{ layer_indices->add_range (first_layer_index, first_layer_index + num_of_layers - 1); }
void add_palette_index (unsigned palette_index)
{ palette_indices->add (palette_index); }
public:
const void *base;
hb_set_t visited_paint;
hb_set_t *glyphs;
hb_set_t *layer_indices;
hb_set_t *palette_indices;
hb_colrv1_closure_context_t (const void *base_,
hb_set_t *glyphs_,
hb_set_t *layer_indices_,
hb_set_t *palette_indices_) :
base (base_),
glyphs (glyphs_),
layer_indices (layer_indices_),
palette_indices (palette_indices_)
{}
};
struct LayerRecord
{
operator hb_ot_color_layer_t () const { return {glyphId, colorIdx}; }
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this));
}
public:
HBGlyphID glyphId; /* Glyph ID of layer glyph */
Index colorIdx; /* Index value to use with a
* selected color palette.
* An index value of 0xFFFF
* is a special case indicating
* that the text foreground
* color (defined by a
* higher-level client) should
* be used and shall not be
* treated as actual index
* into CPAL ColorRecord array. */
public:
DEFINE_SIZE_STATIC (4);
};
struct BaseGlyphRecord
{
int cmp (hb_codepoint_t g) const
{ return g < glyphId ? -1 : g > glyphId ? 1 : 0; }
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (likely (c->check_struct (this)));
}
public:
HBGlyphID glyphId; /* Glyph ID of reference glyph */
HBUINT16 firstLayerIdx; /* Index (from beginning of
* the Layer Records) to the
* layer record. There will be
* numLayers consecutive entries
* for this base glyph. */
HBUINT16 numLayers; /* Number of color layers
* associated with this glyph */
public:
DEFINE_SIZE_STATIC (6);
};
template <typename T>
struct Variable
{
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this));
}
protected:
T value;
VarIdx varIdx;
public:
DEFINE_SIZE_STATIC (4 + T::static_size);
};
template <typename T>
struct NoVariable
{
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this));
}
T value;
public:
DEFINE_SIZE_STATIC (T::static_size);
};
// Color structures
template <template<typename> class Var>
struct ColorIndex
{
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->embed (*this);
if (unlikely (!out)) return_trace (false);
return_trace (c->serializer->check_assign (out->paletteIndex, c->plan->colr_palettes->get (paletteIndex),
HB_SERIALIZE_ERROR_INT_OVERFLOW));
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this));
}
HBUINT16 paletteIndex;
Var<F2DOT14> alpha;
public:
DEFINE_SIZE_STATIC (2 + Var<F2DOT14>::static_size);
};
template <template<typename> class Var>
struct ColorStop
{
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
if (unlikely (!c->serializer->embed (stopOffset))) return_trace (false);
return_trace (color.subset (c));
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this));
}
Var<F2DOT14> stopOffset;
ColorIndex<Var> color;
public:
DEFINE_SIZE_STATIC (Var<F2DOT14>::static_size + ColorIndex<Var>::static_size);
};
struct Extend : HBUINT8
{
enum {
EXTEND_PAD = 0,
EXTEND_REPEAT = 1,
EXTEND_REFLECT = 2,
};
public:
DEFINE_SIZE_STATIC (1);
};
template <template<typename> class Var>
struct ColorLine
{
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->start_embed (this);
if (unlikely (!out)) return_trace (false);
if (unlikely (!c->serializer->extend_min (out))) return_trace (false);
if (!c->serializer->check_assign (out->extend, extend, HB_SERIALIZE_ERROR_INT_OVERFLOW)) return_trace (false);
if (!c->serializer->check_assign (out->stops.len, stops.len, HB_SERIALIZE_ERROR_ARRAY_OVERFLOW)) return_trace (false);
for (const auto& stop : stops.iter ())
{
if (!stop.subset (c)) return_trace (false);
}
return_trace (true);
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) &&
stops.sanitize (c));
}
Extend extend;
Array16Of<ColorStop<Var>> stops;
public:
DEFINE_SIZE_ARRAY_SIZED (3, stops);
};
// Composition modes
// Compositing modes are taken from https://www.w3.org/TR/compositing-1/
// NOTE: a brief audit of major implementations suggests most support most
// or all of the specified modes.
struct CompositeMode : HBUINT8
{
enum {
// Porter-Duff modes
// https://www.w3.org/TR/compositing-1/#porterduffcompositingoperators
COMPOSITE_CLEAR = 0, // https://www.w3.org/TR/compositing-1/#porterduffcompositingoperators_clear
COMPOSITE_SRC = 1, // https://www.w3.org/TR/compositing-1/#porterduffcompositingoperators_src
COMPOSITE_DEST = 2, // https://www.w3.org/TR/compositing-1/#porterduffcompositingoperators_dst
COMPOSITE_SRC_OVER = 3, // https://www.w3.org/TR/compositing-1/#porterduffcompositingoperators_srcover
COMPOSITE_DEST_OVER = 4, // https://www.w3.org/TR/compositing-1/#porterduffcompositingoperators_dstover
COMPOSITE_SRC_IN = 5, // https://www.w3.org/TR/compositing-1/#porterduffcompositingoperators_srcin
COMPOSITE_DEST_IN = 6, // https://www.w3.org/TR/compositing-1/#porterduffcompositingoperators_dstin
COMPOSITE_SRC_OUT = 7, // https://www.w3.org/TR/compositing-1/#porterduffcompositingoperators_srcout
COMPOSITE_DEST_OUT = 8, // https://www.w3.org/TR/compositing-1/#porterduffcompositingoperators_dstout
COMPOSITE_SRC_ATOP = 9, // https://www.w3.org/TR/compositing-1/#porterduffcompositingoperators_srcatop
COMPOSITE_DEST_ATOP = 10, // https://www.w3.org/TR/compositing-1/#porterduffcompositingoperators_dstatop
COMPOSITE_XOR = 11, // https://www.w3.org/TR/compositing-1/#porterduffcompositingoperators_xor
COMPOSITE_PLUS = 12, // https://www.w3.org/TR/compositing-1/#porterduffcompositingoperators_plus
// Blend modes
// https://www.w3.org/TR/compositing-1/#blending
COMPOSITE_SCREEN = 13, // https://www.w3.org/TR/compositing-1/#blendingscreen
COMPOSITE_OVERLAY = 14, // https://www.w3.org/TR/compositing-1/#blendingoverlay
COMPOSITE_DARKEN = 15, // https://www.w3.org/TR/compositing-1/#blendingdarken
COMPOSITE_LIGHTEN = 16, // https://www.w3.org/TR/compositing-1/#blendinglighten
COMPOSITE_COLOR_DODGE = 17, // https://www.w3.org/TR/compositing-1/#blendingcolordodge
COMPOSITE_COLOR_BURN = 18, // https://www.w3.org/TR/compositing-1/#blendingcolorburn
COMPOSITE_HARD_LIGHT = 19, // https://www.w3.org/TR/compositing-1/#blendinghardlight
COMPOSITE_SOFT_LIGHT = 20, // https://www.w3.org/TR/compositing-1/#blendingsoftlight
COMPOSITE_DIFFERENCE = 21, // https://www.w3.org/TR/compositing-1/#blendingdifference
COMPOSITE_EXCLUSION = 22, // https://www.w3.org/TR/compositing-1/#blendingexclusion
COMPOSITE_MULTIPLY = 23, // https://www.w3.org/TR/compositing-1/#blendingmultiply
// Modes that, uniquely, do not operate on components
// https://www.w3.org/TR/compositing-1/#blendingnonseparable
COMPOSITE_HSL_HUE = 24, // https://www.w3.org/TR/compositing-1/#blendinghue
COMPOSITE_HSL_SATURATION = 25, // https://www.w3.org/TR/compositing-1/#blendingsaturation
COMPOSITE_HSL_COLOR = 26, // https://www.w3.org/TR/compositing-1/#blendingcolor
COMPOSITE_HSL_LUMINOSITY = 27, // https://www.w3.org/TR/compositing-1/#blendingluminosity
};
public:
DEFINE_SIZE_STATIC (1);
};
template <template<typename> class Var>
struct Affine2x3
{
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this));
}
Var<HBFixed> xx;
Var<HBFixed> yx;
Var<HBFixed> xy;
Var<HBFixed> yy;
Var<HBFixed> dx;
Var<HBFixed> dy;
public:
DEFINE_SIZE_STATIC (6 * Var<HBFixed>::static_size);
};
struct PaintColrLayers
{
void closurev1 (hb_colrv1_closure_context_t* c) const;
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->embed (this);
if (unlikely (!out)) return_trace (false);
return_trace (c->serializer->check_assign (out->firstLayerIndex, c->plan->colrv1_layers->get (firstLayerIndex),
HB_SERIALIZE_ERROR_INT_OVERFLOW));
return_trace (true);
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this));
}
HBUINT8 format; /* format = 1 */
HBUINT8 numLayers;
HBUINT32 firstLayerIndex; /* index into COLRv1::layersV1 */
public:
DEFINE_SIZE_STATIC (6);
};
template <template<typename> class Var>
struct PaintSolid
{
void closurev1 (hb_colrv1_closure_context_t* c) const
{ c->add_palette_index (color.paletteIndex); }
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
if (unlikely (!c->serializer->embed (format))) return_trace (false);
return_trace (color.subset (c));
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this));
}
HBUINT8 format; /* format = 2(noVar) or 3(Var)*/
ColorIndex<Var> color;
public:
DEFINE_SIZE_STATIC (1 + ColorIndex<Var>::static_size);
};
template <template<typename> class Var>
struct PaintLinearGradient
{
void closurev1 (hb_colrv1_closure_context_t* c) const
{
for (const auto &stop : (this+colorLine).stops.iter ())
c->add_palette_index (stop.color.paletteIndex);
}
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->embed (this);
if (unlikely (!out)) return_trace (false);
return_trace (out->colorLine.serialize_subset (c, colorLine, this));
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) && colorLine.sanitize (c, this));
}
HBUINT8 format; /* format = 4(noVar) or 5 (Var) */
Offset24To<ColorLine<Var>> colorLine; /* Offset (from beginning of PaintLinearGradient
* table) to ColorLine subtable. */
Var<FWORD> x0;
Var<FWORD> y0;
Var<FWORD> x1;
Var<FWORD> y1;
Var<FWORD> x2;
Var<FWORD> y2;
public:
DEFINE_SIZE_STATIC (4 + 6 * Var<FWORD>::static_size);
};
template <template<typename> class Var>
struct PaintRadialGradient
{
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->embed (this);
if (unlikely (!out)) return_trace (false);
return_trace (out->colorLine.serialize_subset (c, colorLine, this));
}
void closurev1 (hb_colrv1_closure_context_t* c) const
{
for (const auto &stop : (this+colorLine).stops.iter ())
c->add_palette_index (stop.color.paletteIndex);
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) && colorLine.sanitize (c, this));
}
HBUINT8 format; /* format = 6(noVar) or 7 (Var) */
Offset24To<ColorLine<Var>> colorLine; /* Offset (from beginning of PaintRadialGradient
* table) to ColorLine subtable. */
Var<FWORD> x0;
Var<FWORD> y0;
Var<UFWORD> radius0;
Var<FWORD> x1;
Var<FWORD> y1;
Var<UFWORD> radius1;
public:
DEFINE_SIZE_STATIC (4 + 6 * Var<FWORD>::static_size);
};
template <template<typename> class Var>
struct PaintSweepGradient
{
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->embed (this);
if (unlikely (!out)) return_trace (false);
return_trace (out->colorLine.serialize_subset (c, colorLine, this));
}
void closurev1 (hb_colrv1_closure_context_t* c) const
{
for (const auto &stop : (this+colorLine).stops.iter ())
c->add_palette_index (stop.color.paletteIndex);
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) && colorLine.sanitize (c, this));
}
HBUINT8 format; /* format = 8(noVar) or 9 (Var) */
Offset24To<ColorLine<Var>> colorLine; /* Offset (from beginning of PaintSweepGradient
* table) to ColorLine subtable. */
Var<FWORD> centerX;
Var<FWORD> centerY;
Var<HBFixed> startAngle;
Var<HBFixed> endAngle;
public:
DEFINE_SIZE_STATIC (2 * Var<FWORD>::static_size + 2 * Var<HBFixed>::static_size);
};
struct Paint;
// Paint a non-COLR glyph, filled as indicated by paint.
struct PaintGlyph
{
void closurev1 (hb_colrv1_closure_context_t* c) const;
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->embed (this);
if (unlikely (!out)) return_trace (false);
if (! c->serializer->check_assign (out->gid, c->plan->glyph_map->get (gid),
HB_SERIALIZE_ERROR_INT_OVERFLOW))
return_trace (false);
return_trace (out->paint.serialize_subset (c, paint, this));
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) && paint.sanitize (c, this));
}
HBUINT8 format; /* format = 10 */
Offset24To<Paint> paint; /* Offset (from beginning of PaintGlyph table) to Paint subtable. */
HBUINT16 gid;
public:
DEFINE_SIZE_STATIC (6);
};
struct PaintColrGlyph
{
void closurev1 (hb_colrv1_closure_context_t* c) const;
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->embed (this);
if (unlikely (!out)) return_trace (false);
return_trace (c->serializer->check_assign (out->gid, c->plan->glyph_map->get (gid),
HB_SERIALIZE_ERROR_INT_OVERFLOW));
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this));
}
HBUINT8 format; /* format = 11 */
HBUINT16 gid;
public:
DEFINE_SIZE_STATIC (3);
};
template <template<typename> class Var>
struct PaintTransform
{
HB_INTERNAL void closurev1 (hb_colrv1_closure_context_t* c) const;
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->embed (this);
if (unlikely (!out)) return_trace (false);
return_trace (out->src.serialize_subset (c, src, this));
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) && src.sanitize (c, this));
}
HBUINT8 format; /* format = 12(noVar) or 13 (Var) */
Offset24To<Paint> src; /* Offset (from beginning of PaintTransform table) to Paint subtable. */
Affine2x3<Var> transform;
public:
DEFINE_SIZE_STATIC (4 + Affine2x3<Var>::static_size);
};
template <template<typename> class Var>
struct PaintTranslate
{
HB_INTERNAL void closurev1 (hb_colrv1_closure_context_t* c) const;
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->embed (this);
if (unlikely (!out)) return_trace (false);
return_trace (out->src.serialize_subset (c, src, this));
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) && src.sanitize (c, this));
}
HBUINT8 format; /* format = 14(noVar) or 15 (Var) */
Offset24To<Paint> src; /* Offset (from beginning of PaintTranslate table) to Paint subtable. */
Var<HBFixed> dx;
Var<HBFixed> dy;
public:
DEFINE_SIZE_STATIC (4 + Var<HBFixed>::static_size);
};
template <template<typename> class Var>
struct PaintRotate
{
HB_INTERNAL void closurev1 (hb_colrv1_closure_context_t* c) const;
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->embed (this);
if (unlikely (!out)) return_trace (false);
return_trace (out->src.serialize_subset (c, src, this));
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) && src.sanitize (c, this));
}
HBUINT8 format; /* format = 16 (noVar) or 17(Var) */
Offset24To<Paint> src; /* Offset (from beginning of PaintRotate table) to Paint subtable. */
Var<HBFixed> angle;
Var<HBFixed> centerX;
Var<HBFixed> centerY;
public:
DEFINE_SIZE_STATIC (4 + 3 * Var<HBFixed>::static_size);
};
template <template<typename> class Var>
struct PaintSkew
{
HB_INTERNAL void closurev1 (hb_colrv1_closure_context_t* c) const;
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->embed (this);
if (unlikely (!out)) return_trace (false);
return_trace (out->src.serialize_subset (c, src, this));
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) && src.sanitize (c, this));
}
HBUINT8 format; /* format = 18(noVar) or 19 (Var) */
Offset24To<Paint> src; /* Offset (from beginning of PaintSkew table) to Paint subtable. */
Var<HBFixed> xSkewAngle;
Var<HBFixed> ySkewAngle;
Var<HBFixed> centerX;
Var<HBFixed> centerY;
public:
DEFINE_SIZE_STATIC (4 + 4 * Var<HBFixed>::static_size);
};
struct PaintComposite
{
void closurev1 (hb_colrv1_closure_context_t* c) const;
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->embed (this);
if (unlikely (!out)) return_trace (false);
if (!out->src.serialize_subset (c, src, this)) return_trace (false);
return_trace (out->backdrop.serialize_subset (c, backdrop, this));
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) &&
src.sanitize (c, this) &&
backdrop.sanitize (c, this));
}
HBUINT8 format; /* format = 20 */
Offset24To<Paint> src; /* Offset (from beginning of PaintComposite table) to source Paint subtable. */
CompositeMode mode; /* If mode is unrecognized use COMPOSITE_CLEAR */
Offset24To<Paint> backdrop; /* Offset (from beginning of PaintComposite table) to backdrop Paint subtable. */
public:
DEFINE_SIZE_STATIC (8);
};
struct Paint
{
template <typename context_t, typename ...Ts>
typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const
{
TRACE_DISPATCH (this, u.format);
if (unlikely (!c->may_dispatch (this, &u.format))) return_trace (c->no_dispatch_return_value ());
switch (u.format) {
case 1: return_trace (c->dispatch (u.paintformat1, hb_forward<Ts> (ds)...));
case 2: return_trace (c->dispatch (u.paintformat2, hb_forward<Ts> (ds)...));
case 3: return_trace (c->dispatch (u.paintformat3, hb_forward<Ts> (ds)...));
case 4: return_trace (c->dispatch (u.paintformat4, hb_forward<Ts> (ds)...));
case 5: return_trace (c->dispatch (u.paintformat5, hb_forward<Ts> (ds)...));
case 6: return_trace (c->dispatch (u.paintformat6, hb_forward<Ts> (ds)...));
case 7: return_trace (c->dispatch (u.paintformat7, hb_forward<Ts> (ds)...));
case 8: return_trace (c->dispatch (u.paintformat8, hb_forward<Ts> (ds)...));
case 9: return_trace (c->dispatch (u.paintformat9, hb_forward<Ts> (ds)...));
case 10: return_trace (c->dispatch (u.paintformat10, hb_forward<Ts> (ds)...));
case 11: return_trace (c->dispatch (u.paintformat11, hb_forward<Ts> (ds)...));
case 12: return_trace (c->dispatch (u.paintformat12, hb_forward<Ts> (ds)...));
case 13: return_trace (c->dispatch (u.paintformat13, hb_forward<Ts> (ds)...));
case 14: return_trace (c->dispatch (u.paintformat14, hb_forward<Ts> (ds)...));
case 15: return_trace (c->dispatch (u.paintformat15, hb_forward<Ts> (ds)...));
case 16: return_trace (c->dispatch (u.paintformat16, hb_forward<Ts> (ds)...));
case 17: return_trace (c->dispatch (u.paintformat17, hb_forward<Ts> (ds)...));
case 18: return_trace (c->dispatch (u.paintformat18, hb_forward<Ts> (ds)...));
case 19: return_trace (c->dispatch (u.paintformat19, hb_forward<Ts> (ds)...));
case 20: return_trace (c->dispatch (u.paintformat20, hb_forward<Ts> (ds)...));
default:return_trace (c->default_return_value ());
}
}
protected:
union {
HBUINT8 format;
PaintColrLayers paintformat1;
PaintSolid<NoVariable> paintformat2;
PaintSolid<Variable> paintformat3;
PaintLinearGradient<NoVariable> paintformat4;
PaintLinearGradient<Variable> paintformat5;
PaintRadialGradient<NoVariable> paintformat6;
PaintRadialGradient<Variable> paintformat7;
PaintSweepGradient<NoVariable> paintformat8;
PaintSweepGradient<Variable> paintformat9;
PaintGlyph paintformat10;
PaintColrGlyph paintformat11;
PaintTransform<NoVariable> paintformat12;
PaintTransform<Variable> paintformat13;
PaintTranslate<NoVariable> paintformat14;
PaintTranslate<Variable> paintformat15;
PaintRotate<NoVariable> paintformat16;
PaintRotate<Variable> paintformat17;
PaintSkew<NoVariable> paintformat18;
PaintSkew<Variable> paintformat19;
PaintComposite paintformat20;
} u;
};
struct BaseGlyphV1Record
{
int cmp (hb_codepoint_t g) const
{ return g < glyphId ? -1 : g > glyphId ? 1 : 0; }
bool serialize (hb_serialize_context_t *s, const hb_map_t* glyph_map,
const void* src_base, hb_subset_context_t *c) const
{
TRACE_SERIALIZE (this);
auto *out = s->embed (this);
if (unlikely (!out)) return_trace (false);
if (!s->check_assign (out->glyphId, glyph_map->get (glyphId),
HB_SERIALIZE_ERROR_INT_OVERFLOW))
return_trace (false);
return_trace (out->paint.serialize_subset (c, paint, src_base));
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (likely (c->check_struct (this) && paint.sanitize (c, this)));
}
public:
HBGlyphID glyphId; /* Glyph ID of reference glyph */
Offset32To<Paint> paint; /* Offset (from beginning of BaseGlyphV1Record) to Paint,
* Typically PaintColrLayers */
public:
DEFINE_SIZE_STATIC (6);
};
struct BaseGlyphV1List : SortedArray32Of<BaseGlyphV1Record>
{
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->start_embed (this);
if (unlikely (!c->serializer->extend_min (out))) return_trace (false);
const hb_set_t* glyphset = c->plan->_glyphset;
for (const auto& _ : as_array ())
{
unsigned gid = _.glyphId;
if (!glyphset->has (gid)) continue;
if (_.serialize (c->serializer, c->plan->glyph_map, this, c)) out->len++;
else return_trace (false);
}
return_trace (out->len != 0);
}
};
struct LayerV1List : Array32OfOffset32To<Paint>
{
const Paint& get_paint (unsigned i) const
{ return this+(*this)[i]; }
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->start_embed (this);
if (unlikely (!c->serializer->extend_min (out))) return_trace (false);
for (const auto& _ : + hb_enumerate (*this)
| hb_filter (c->plan->colrv1_layers, hb_first))
{
auto *o = out->serialize_append (c->serializer);
if (unlikely (!o) || !o->serialize_subset (c, _.second, this))
return_trace (false);
}
return_trace (true);
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (Array32OfOffset32To<Paint>::sanitize (c, this));
}
};
struct COLR
{
static constexpr hb_tag_t tableTag = HB_OT_TAG_COLR;
bool has_data () const { return numBaseGlyphs; }
unsigned int get_glyph_layers (hb_codepoint_t glyph,
unsigned int start_offset,
unsigned int *count, /* IN/OUT. May be NULL. */
hb_ot_color_layer_t *layers /* OUT. May be NULL. */) const
{
const BaseGlyphRecord &record = (this+baseGlyphsZ).bsearch (numBaseGlyphs, glyph);
hb_array_t<const LayerRecord> all_layers = (this+layersZ).as_array (numLayers);
hb_array_t<const LayerRecord> glyph_layers = all_layers.sub_array (record.firstLayerIdx,
record.numLayers);
if (count)
{
+ glyph_layers.sub_array (start_offset, count)
| hb_sink (hb_array (layers, *count))
;
}
return glyph_layers.length;
}
struct accelerator_t
{
accelerator_t () {}
~accelerator_t () { fini (); }
void init (hb_face_t *face)
{ colr = hb_sanitize_context_t ().reference_table<COLR> (face); }
void fini () { this->colr.destroy (); }
bool is_valid () { return colr.get_blob ()->length; }
void closure_glyphs (hb_codepoint_t glyph,
hb_set_t *related_ids /* OUT */) const
{ colr->closure_glyphs (glyph, related_ids); }
void closure_V0palette_indices (const hb_set_t *glyphs,
hb_set_t *palettes /* OUT */) const
{ colr->closure_V0palette_indices (glyphs, palettes); }
void closure_forV1 (hb_set_t *glyphset,
hb_set_t *layer_indices,
hb_set_t *palette_indices) const
{ colr->closure_forV1 (glyphset, layer_indices, palette_indices); }
private:
hb_blob_ptr_t<COLR> colr;
};
void closure_glyphs (hb_codepoint_t glyph,
hb_set_t *related_ids /* OUT */) const
{
const BaseGlyphRecord *record = get_base_glyph_record (glyph);
if (!record) return;
auto glyph_layers = (this+layersZ).as_array (numLayers).sub_array (record->firstLayerIdx,
record->numLayers);
if (!glyph_layers.length) return;
related_ids->add_array (&glyph_layers[0].glyphId, glyph_layers.length, LayerRecord::min_size);
}
void closure_V0palette_indices (const hb_set_t *glyphs,
hb_set_t *palettes /* OUT */) const
{
if (!numBaseGlyphs || !numLayers) return;
hb_array_t<const BaseGlyphRecord> baseGlyphs = (this+baseGlyphsZ).as_array (numBaseGlyphs);
hb_array_t<const LayerRecord> all_layers = (this+layersZ).as_array (numLayers);
for (const BaseGlyphRecord record : baseGlyphs)
{
if (!glyphs->has (record.glyphId)) continue;
hb_array_t<const LayerRecord> glyph_layers = all_layers.sub_array (record.firstLayerIdx,
record.numLayers);
for (const LayerRecord layer : glyph_layers)
palettes->add (layer.colorIdx);
}
}
void closure_forV1 (hb_set_t *glyphset,
hb_set_t *layer_indices,
hb_set_t *palette_indices) const
{
if (version != 1) return;
hb_set_t visited_glyphs;
hb_colrv1_closure_context_t c (this, &visited_glyphs, layer_indices, palette_indices);
const BaseGlyphV1List &baseglyphV1_records = this+baseGlyphsV1List;
for (const BaseGlyphV1Record &baseglyphV1record: baseglyphV1_records.iter ())
{
unsigned gid = baseglyphV1record.glyphId;
if (!glyphset->has (gid)) continue;
const Paint &paint = &baseglyphV1_records+baseglyphV1record.paint;
paint.dispatch (&c);
}
hb_set_union (glyphset, &visited_glyphs);
}
const LayerV1List& get_layerV1List () const
{ return (this+layersV1); }
const BaseGlyphV1List& get_baseglyphV1List () const
{ return (this+baseGlyphsV1List); }
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) &&
(this+baseGlyphsZ).sanitize (c, numBaseGlyphs) &&
(this+layersZ).sanitize (c, numLayers) &&
(version == 0 || (version == 1 &&
baseGlyphsV1List.sanitize (c, this) &&
layersV1.sanitize (c, this) &&
varStore.sanitize (c, this))));
}
template<typename BaseIterator, typename LayerIterator,
hb_requires (hb_is_iterator (BaseIterator)),
hb_requires (hb_is_iterator (LayerIterator))>
bool serialize_V0 (hb_serialize_context_t *c,
unsigned version,
BaseIterator base_it,
LayerIterator layer_it)
{
TRACE_SERIALIZE (this);
if (unlikely (base_it.len () != layer_it.len ()))
return_trace (false);
if (unlikely (!c->extend_min (this))) return_trace (false);
this->version = version;
numLayers = 0;
numBaseGlyphs = base_it.len ();
if (base_it.len () == 0)
{
baseGlyphsZ = 0;
layersZ = 0;
return_trace (true);
}
baseGlyphsZ = COLR::min_size;
layersZ = COLR::min_size + numBaseGlyphs * BaseGlyphRecord::min_size;
for (const hb_item_type<BaseIterator> _ : + base_it.iter ())
{
auto* record = c->embed (_);
if (unlikely (!record)) return_trace (false);
record->firstLayerIdx = numLayers;
numLayers += record->numLayers;
}
for (const hb_item_type<LayerIterator>& _ : + layer_it.iter ())
_.as_array ().copy (c);
return_trace (true);
}
const BaseGlyphRecord* get_base_glyph_record (hb_codepoint_t gid) const
{
if ((unsigned int) gid == 0) // Ignore notdef.
return nullptr;
const BaseGlyphRecord* record = &(this+baseGlyphsZ).bsearch (numBaseGlyphs, (unsigned int) gid);
if ((record && (hb_codepoint_t) record->glyphId != gid))
record = nullptr;
return record;
}
const BaseGlyphV1Record* get_base_glyphV1_record (hb_codepoint_t gid) const
{
const BaseGlyphV1Record* record = &(this+baseGlyphsV1List).bsearch ((unsigned) gid);
if ((record && (hb_codepoint_t) record->glyphId != gid))
record = nullptr;
return record;
}
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
const hb_map_t &reverse_glyph_map = *c->plan->reverse_glyph_map;
auto base_it =
+ hb_range (c->plan->num_output_glyphs ())
| hb_map_retains_sorting ([&](hb_codepoint_t new_gid)
{
hb_codepoint_t old_gid = reverse_glyph_map.get (new_gid);
const BaseGlyphRecord* old_record = get_base_glyph_record (old_gid);
if (unlikely (!old_record))
return hb_pair_t<bool, BaseGlyphRecord> (false, Null (BaseGlyphRecord));
BaseGlyphRecord new_record = {};
new_record.glyphId = new_gid;
new_record.numLayers = old_record->numLayers;
return hb_pair_t<bool, BaseGlyphRecord> (true, new_record);
})
| hb_filter (hb_first)
| hb_map_retains_sorting (hb_second)
;
auto layer_it =
+ hb_range (c->plan->num_output_glyphs ())
| hb_map (reverse_glyph_map)
| hb_map_retains_sorting ([&](hb_codepoint_t old_gid)
{
const BaseGlyphRecord* old_record = get_base_glyph_record (old_gid);
hb_vector_t<LayerRecord> out_layers;
if (unlikely (!old_record ||
old_record->firstLayerIdx >= numLayers ||
old_record->firstLayerIdx + old_record->numLayers > numLayers))
return hb_pair_t<bool, hb_vector_t<LayerRecord>> (false, out_layers);
auto layers = (this+layersZ).as_array (numLayers).sub_array (old_record->firstLayerIdx,
old_record->numLayers);
out_layers.resize (layers.length);
for (unsigned int i = 0; i < layers.length; i++) {
out_layers[i] = layers[i];
hb_codepoint_t new_gid = 0;
if (unlikely (!c->plan->new_gid_for_old_gid (out_layers[i].glyphId, &new_gid)))
return hb_pair_t<bool, hb_vector_t<LayerRecord>> (false, out_layers);
out_layers[i].glyphId = new_gid;
out_layers[i].colorIdx = c->plan->colr_palettes->get (layers[i].colorIdx);
}
return hb_pair_t<bool, hb_vector_t<LayerRecord>> (true, out_layers);
})
| hb_filter (hb_first)
| hb_map_retains_sorting (hb_second)
;
if (version == 0 && (!base_it || !layer_it))
return_trace (false);
COLR *colr_prime = c->serializer->start_embed<COLR> ();
bool ret = colr_prime->serialize_V0 (c->serializer, version, base_it, layer_it);
if (version == 0) return_trace (ret);
auto snap = c->serializer->snapshot ();
if (!c->serializer->allocate_size<void> (3 * HBUINT32::static_size)) return_trace (false);
if (!colr_prime->baseGlyphsV1List.serialize_subset (c, baseGlyphsV1List, this))
{
if (c->serializer->in_error ()) return_trace (false);
//no more COLRv1 glyphs: downgrade to version 0
c->serializer->revert (snap);
colr_prime->version = 0;
return_trace (true);
}
if (!colr_prime->layersV1.serialize_subset (c, layersV1, this)) return_trace (false);
colr_prime->varStore = 0;
//TODO: subset varStore once it's implemented in fonttools
return_trace (true);
}
protected:
HBUINT16 version; /* Table version number (starts at 0). */
HBUINT16 numBaseGlyphs; /* Number of Base Glyph Records. */
NNOffset32To<SortedUnsizedArrayOf<BaseGlyphRecord>>
baseGlyphsZ; /* Offset to Base Glyph records. */
NNOffset32To<UnsizedArrayOf<LayerRecord>>
layersZ; /* Offset to Layer Records. */
HBUINT16 numLayers; /* Number of Layer Records. */
// Version-1 additions
Offset32To<BaseGlyphV1List> baseGlyphsV1List;
Offset32To<LayerV1List> layersV1;
Offset32To<VariationStore> varStore;
public:
DEFINE_SIZE_MIN (14);
};
} /* namespace OT */
#endif /* HB_OT_COLOR_COLR_TABLE_HH */
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