harfbuzz/src/hb-ot-color-colrv1-paint.hh

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/*
* Copyright © 2022 Matthias Clasen
*
* 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.
*
*/
#ifndef HB_OT_COLR_COLRV1_PAINT_HH
#define HB_OT_COLR_COLRV1_PAINT_HH
#include "hb-open-type.hh"
#include "hb-ot-layout-common.hh"
#include "hb-ot-color-colr-table.hh"
/*
* COLR -- Color
* https://docs.microsoft.com/en-us/typography/opentype/spec/colr
*/
namespace OT {
struct hb_colrv1_paint_context_t :
hb_dispatch_context_t<hb_colrv1_paint_context_t>
{
template <typename T>
return_t dispatch (const T &obj)
{
obj.paint (this);
return hb_empty_t ();
}
const COLR* get_colr_table () const
{ return reinterpret_cast<const COLR *> (base); }
public:
const void *base;
hb_paint_funcs_t *funcs;
void *paint_data;
hb_colrv1_paint_context_t (const void *base_, hb_paint_funcs_t *funcs_, void *paint_data_)
base (base_), funcs (funcs_), paint_data (paint_data_)
{}
void push_transform (float xx, float yx,
float xy, float yy,
float x0, float y0)
{
funcs->push_transform (paint_data, xx, yx, xy, yy, x0, y0);
}
void pop_transform ()
{
funcs->pop_transform (paint_data);
}
void push_clip (hb_codepoint_t gid)
{
funcs->push_clip (paint_data, gid);
}
void pop_clip ()
{
funcs->pop_clip (paint_data);
}
void solid (unsigned int color_index)
{
funcs->solid (paint_data, color_index);
}
void linear_gradient (hb_color_line *color_line,
float x0, float y0,
float x1, float y1,
float x2, float y2)
{
funcs->linear_gradient (paint_data,
color_line, x0, y0, x1, y1, x2, y2);
}
void radial_gradient (hb_color_line *color_line,
float x0, float y0, float r0,
float x1, float y1, float r1)
{
funcs->radial_gradient (paint_data,
color_line, x0, y0, r0, x1, y1, r1);
}
void sweep_gradient (hb_color_line *color_line,
float x0, float y0,
float start_angle, float end_angle)'
{
funcs->sweep_gradient (paint_data,
color_line, x0, y0, start_angle, end_angle);
}
void push_group ()
{
funcs->push_group (paint_data);
}
void pop_group_and_composite (hb_paint_composite_mode_t mode)
{
funcs->pop_group_and_composite (paint_data, mode);
}
}
HB_INTERNAL void PaintColrLayers::paint (hb_colrv1_paint_context_t *c) const
{
const COLR *colr_table = c->get_colr_table ();
const LayerList &paint_offset_lists = colr_table->get_layerList ();
for (unsigned i = firstLayerIndex; i < firstLayerIndex + numLayers; i++)
{
const Paint &paint = std::addressof (paint_offset_lists) + paint_offset_lists[i];
c->push_group ();
paint.dispatch (c);
c->pop_group_and_composite (HB_PAINT_COMPOSITE_MODE_OVER);
}
}
HB_INTERNAL void PaintGlyph::paint (hb_colrv1_paint_context_t *c) const
{
c->push_clip (gid);
(this+paint).dispatch (c);
c->pop_clip ();
}
HB_INTERNAL void PaintColrGlyph::paint (hb_colrv1_paint_context_t *c) const
{
const COLR *colr_table = c->get_colr_table ();
const BaseGlyphPaintRecord* baseglyph_paintrecord = colr_table->get_base_glyph_paintrecord (gid);
if (!baseglyph_paintrecord) return;
c->push_clip (gid);
const BaseGlyphList &baseglyph_list = colr_table->get_baseglyphList ();
(&baseglyph_list+baseglyph_paintrecord->paint).dispatch (c);
c->pop_clip ();
}
template <template<typename> class Var>
HB_INTERNAL void PaintTransform<Var>::paint (hb_colrv1_paint_context_t* c) const
{
c->push_transform (transform.xx, transform.yx,
transform.xy, transform.yy,
transform.dx, transform.dy);
(this+src).dispatch (c);
c->pop_transform ();
}
HB_INTERNAL void PaintTranslate::paint (hb_colrv1_paint_context_t* c) const
{
c->push_transform (0, 0, 0, 0, dx, dy);
(this+src).dispatch (c);
c->pop_transform ();
}
HB_INTERNAL void PaintScale::paint (hb_colrv1_paint_context_t* c) const
{
c->push_transform (scaleX, 0, 0, scaleY, 0, 0);
(this+src).dispatch (c);
c->pop_transform ();
}
HB_INTERNAL void PaintScaleAroundCenter::paint (hb_colrv1_paint_context_t* c) const
{
c->push_transform (0, 0, 0, 0, - centerX, - centerY);
c->push_transform (scaleX, 0, 0, scaleY, 0, 0);
c->push_transform (0, 0, 0, 0, centerX, centerY);
(this+src).dispatch (c);
c->pop_transform ();
c->pop_transform ();
c->pop_transform ();
}
HB_INTERNAL void PaintScaleUniform::paint (hb_colrv1_paint_context_t* c) const
{
c->push_transform (scale, 0, 0, scale, 0, 0);
(this+src).dispatch (c);
c->pop_transform ();
}
HB_INTERNAL void PaintScaleUniformAroundCenter::paint (hb_colrv1_paint_context_t* c) const
{
c->push_transform (0, 0, 0, 0, - centerX, - centerY);
c->push_transform (scale, 0, 0, scale, 0, 0);
c->push_transform (0, 0, 0, 0, centerX, centerY);
(this+src).dispatch (c);
c->pop_transform ();
c->pop_transform ();
c->pop_transform ();
}
HB_INTERNAL void PaintRotate::paint (hb_colrv1_paint_context_t* c) const
{
c->push_transform (cos (angle), sin (angle),
- sin (angle), cos (angle),
0, 0);
(this+src).dispatch (c);
c->pop_transform ();
}
HB_INTERNAL void PaintRotateAroundCenter::paint (hb_colrv1_paint_context_t* c) const
{
c->push_transform (0, 0, 0, 0, - centerX, - centerY);
c->push_transform (cos (angle), sin (angle),
- sin (angle), cos (angle),
0, 0);
c->push_transform (0, 0, 0, 0, centerX, centerY);
(this+src).dispatch (c);
c->pop_transform ();
c->pop_transform ();
c->pop_transform ();
}
HB_INTERNAL void PaintSkew::paint (hb_colrv1_paint_context_t* c) const
{
c->push_transform (1, tan (ySkewAngle),
- tan (xSkewAngle), 1,
0, 0);
(this+src).dispatch (c);
c->pop_transform ();
}
HB_INTERNAL void PaintSkewAroundCenter::paint (hb_colrv1_paint_context_t* c) const
{
c->push_transform (0, 0, 0, 0, - centerX, - centerY);
c->push_transform (1, tan (ySkewAngle),
- tan (xSkewAngle), 1,
0, 0);
c->push_transform (0, 0, 0, 0, centerX, centerY);
(this+src).dispatch (c);
c->pop_transform ();
c->pop_transform ();
c->pop_transform ();
}
HB_INTERNAL void PaintComposite::paint (hb_colrv1_paint_context_t* c) const
{
c->push_group ();
(this+src).dispatch (c);
c->push_group ();
(this+backdrop).dispatch (c);
c->pop_group_and_composite (mode);
c->pop_group_and_composite (HB_PAINT_COMPOSITE_MODE_OVER);
}
HB_INTERNAL void PaintSolid::paint (hb_colrv1_paint_context_t *c) const
{
c->solid (paletteIndex);
}
HB_INTERNAL void PaintLinearGradient::paint (hb_colrv1_paint_context_t *c) const
{
c->linear_gradient (color_line, x0, y0, x1, y1, x2, y2);
}
HB_INTERNAL void PaintRadialGradient::paint (hb_colrv1_paint_context_t *c) const
{
c->radial_gradient (color_line, x0, y0, radius0, x1, y1, radius1);
}
HB_INTERNAL void PaintSweepGradient::paint (hb_colrv1_paint_context_t *c) const
{
c->sweep_gradient (color_line, centerX, centerY, startAngle, endAngle);
}
} /* namespace OT */
#endif /* HB_OT_COLR_COLRV1_CLOSURE_HH */