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/*
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* Copyright © 2022 Matthias Clasen |
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* |
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* This is part of HarfBuzz, a text shaping library. |
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* |
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* Permission is hereby granted, without written agreement and without |
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* license or royalty fees, to use, copy, modify, and distribute this |
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* software and its documentation for any purpose, provided that the |
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* above copyright notice and the following two paragraphs appear in |
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* all copies of this software. |
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* |
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR |
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES |
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN |
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
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* DAMAGE. |
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* |
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, |
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS |
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO |
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
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* |
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*/ |
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#ifndef HB_OT_COLR_COLRV1_PAINT_HH |
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#define HB_OT_COLR_COLRV1_PAINT_HH |
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#include "hb-open-type.hh" |
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#include "hb-ot-layout-common.hh" |
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#include "hb-ot-color-colr-table.hh" |
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/*
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* COLR -- Color |
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* https://docs.microsoft.com/en-us/typography/opentype/spec/colr
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*/ |
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namespace OT { |
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struct hb_colrv1_paint_context_t : |
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hb_dispatch_context_t<hb_colrv1_paint_context_t> |
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{ |
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template <typename T> |
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return_t dispatch (const T &obj) |
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{ |
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obj.paint (this); |
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return hb_empty_t (); |
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} |
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const COLR* get_colr_table () const |
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{ return reinterpret_cast<const COLR *> (base); } |
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public: |
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const void *base; |
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hb_paint_funcs_t *funcs; |
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void *paint_data; |
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hb_colrv1_paint_context_t (const void *base_, hb_paint_funcs_t *funcs_, void *paint_data_) |
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base (base_), funcs (funcs_), paint_data (paint_data_) |
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{} |
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void push_transform (float xx, float yx, |
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float xy, float yy, |
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float x0, float y0) |
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{ |
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funcs->push_transform (paint_data, xx, yx, xy, yy, x0, y0); |
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} |
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void pop_transform () |
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{ |
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funcs->pop_transform (paint_data); |
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} |
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void push_clip (hb_codepoint_t gid) |
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{ |
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funcs->push_clip (paint_data, gid); |
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} |
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void pop_clip () |
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{ |
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funcs->pop_clip (paint_data); |
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} |
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void solid (unsigned int color_index) |
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{ |
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funcs->solid (paint_data, color_index); |
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} |
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void linear_gradient (hb_color_line *color_line, |
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float x0, float y0, |
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float x1, float y1, |
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float x2, float y2) |
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{ |
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funcs->linear_gradient (paint_data, |
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color_line, x0, y0, x1, y1, x2, y2); |
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} |
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void radial_gradient (hb_color_line *color_line, |
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float x0, float y0, float r0, |
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float x1, float y1, float r1) |
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{ |
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funcs->radial_gradient (paint_data, |
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color_line, x0, y0, r0, x1, y1, r1); |
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} |
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void sweep_gradient (hb_color_line *color_line, |
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float x0, float y0, |
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float start_angle, float end_angle)' |
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{ |
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funcs->sweep_gradient (paint_data, |
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color_line, x0, y0, start_angle, end_angle); |
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} |
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void push_group () |
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{ |
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funcs->push_group (paint_data); |
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} |
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void pop_group_and_composite (hb_paint_composite_mode_t mode) |
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{ |
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funcs->pop_group_and_composite (paint_data, mode); |
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} |
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} |
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HB_INTERNAL void PaintColrLayers::paint (hb_colrv1_paint_context_t *c) const |
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{ |
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const COLR *colr_table = c->get_colr_table (); |
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const LayerList &paint_offset_lists = colr_table->get_layerList (); |
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for (unsigned i = firstLayerIndex; i < firstLayerIndex + numLayers; i++) |
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{ |
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const Paint &paint = std::addressof (paint_offset_lists) + paint_offset_lists[i]; |
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c->push_group (); |
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paint.dispatch (c); |
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c->pop_group_and_composite (HB_PAINT_COMPOSITE_MODE_OVER); |
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} |
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} |
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HB_INTERNAL void PaintGlyph::paint (hb_colrv1_paint_context_t *c) const |
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{ |
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c->push_clip (gid); |
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(this+paint).dispatch (c); |
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c->pop_clip (); |
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} |
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HB_INTERNAL void PaintColrGlyph::paint (hb_colrv1_paint_context_t *c) const |
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{ |
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const COLR *colr_table = c->get_colr_table (); |
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const BaseGlyphPaintRecord* baseglyph_paintrecord = colr_table->get_base_glyph_paintrecord (gid); |
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if (!baseglyph_paintrecord) return; |
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c->push_clip (gid); |
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const BaseGlyphList &baseglyph_list = colr_table->get_baseglyphList (); |
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(&baseglyph_list+baseglyph_paintrecord->paint).dispatch (c); |
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c->pop_clip (); |
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} |
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template <template<typename> class Var> |
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HB_INTERNAL void PaintTransform<Var>::paint (hb_colrv1_paint_context_t* c) const |
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{ |
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c->push_transform (transform.xx, transform.yx, |
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transform.xy, transform.yy, |
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transform.dx, transform.dy); |
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(this+src).dispatch (c); |
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c->pop_transform (); |
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} |
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HB_INTERNAL void PaintTranslate::paint (hb_colrv1_paint_context_t* c) const |
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{ |
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c->push_transform (0, 0, 0, 0, dx, dy); |
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(this+src).dispatch (c); |
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c->pop_transform (); |
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} |
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HB_INTERNAL void PaintScale::paint (hb_colrv1_paint_context_t* c) const |
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{ |
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c->push_transform (scaleX, 0, 0, scaleY, 0, 0); |
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(this+src).dispatch (c); |
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c->pop_transform (); |
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} |
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HB_INTERNAL void PaintScaleAroundCenter::paint (hb_colrv1_paint_context_t* c) const |
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{ |
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c->push_transform (0, 0, 0, 0, - centerX, - centerY); |
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c->push_transform (scaleX, 0, 0, scaleY, 0, 0); |
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c->push_transform (0, 0, 0, 0, centerX, centerY); |
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(this+src).dispatch (c); |
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c->pop_transform (); |
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c->pop_transform (); |
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c->pop_transform (); |
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} |
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HB_INTERNAL void PaintScaleUniform::paint (hb_colrv1_paint_context_t* c) const |
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{ |
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c->push_transform (scale, 0, 0, scale, 0, 0); |
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(this+src).dispatch (c); |
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c->pop_transform (); |
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} |
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HB_INTERNAL void PaintScaleUniformAroundCenter::paint (hb_colrv1_paint_context_t* c) const |
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{ |
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c->push_transform (0, 0, 0, 0, - centerX, - centerY); |
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c->push_transform (scale, 0, 0, scale, 0, 0); |
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c->push_transform (0, 0, 0, 0, centerX, centerY); |
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(this+src).dispatch (c); |
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c->pop_transform (); |
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c->pop_transform (); |
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c->pop_transform (); |
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} |
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HB_INTERNAL void PaintRotate::paint (hb_colrv1_paint_context_t* c) const |
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{ |
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c->push_transform (cos (angle), sin (angle), |
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- sin (angle), cos (angle), |
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0, 0); |
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(this+src).dispatch (c); |
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c->pop_transform (); |
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} |
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HB_INTERNAL void PaintRotateAroundCenter::paint (hb_colrv1_paint_context_t* c) const |
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{ |
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c->push_transform (0, 0, 0, 0, - centerX, - centerY); |
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c->push_transform (cos (angle), sin (angle), |
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- sin (angle), cos (angle), |
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0, 0); |
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c->push_transform (0, 0, 0, 0, centerX, centerY); |
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(this+src).dispatch (c); |
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c->pop_transform (); |
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c->pop_transform (); |
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c->pop_transform (); |
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} |
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HB_INTERNAL void PaintSkew::paint (hb_colrv1_paint_context_t* c) const |
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{ |
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c->push_transform (1, tan (ySkewAngle), |
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- tan (xSkewAngle), 1, |
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0, 0); |
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(this+src).dispatch (c); |
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c->pop_transform (); |
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} |
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HB_INTERNAL void PaintSkewAroundCenter::paint (hb_colrv1_paint_context_t* c) const |
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{ |
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c->push_transform (0, 0, 0, 0, - centerX, - centerY); |
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c->push_transform (1, tan (ySkewAngle), |
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- tan (xSkewAngle), 1, |
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0, 0); |
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c->push_transform (0, 0, 0, 0, centerX, centerY); |
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(this+src).dispatch (c); |
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c->pop_transform (); |
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c->pop_transform (); |
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c->pop_transform (); |
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} |
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HB_INTERNAL void PaintComposite::paint (hb_colrv1_paint_context_t* c) const |
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{ |
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c->push_group (); |
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(this+src).dispatch (c); |
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c->push_group (); |
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(this+backdrop).dispatch (c); |
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c->pop_group_and_composite (mode); |
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c->pop_group_and_composite (HB_PAINT_COMPOSITE_MODE_OVER); |
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} |
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HB_INTERNAL void PaintSolid::paint (hb_colrv1_paint_context_t *c) const |
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{ |
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c->solid (paletteIndex); |
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} |
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HB_INTERNAL void PaintLinearGradient::paint (hb_colrv1_paint_context_t *c) const |
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{ |
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c->linear_gradient (color_line, x0, y0, x1, y1, x2, y2); |
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} |
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HB_INTERNAL void PaintRadialGradient::paint (hb_colrv1_paint_context_t *c) const |
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{ |
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c->radial_gradient (color_line, x0, y0, radius0, x1, y1, radius1); |
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} |
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HB_INTERNAL void PaintSweepGradient::paint (hb_colrv1_paint_context_t *c) const |
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{ |
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c->sweep_gradient (color_line, centerX, centerY, startAngle, endAngle); |
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} |
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} /* namespace OT */ |
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#endif /* HB_OT_COLR_COLRV1_CLOSURE_HH */ |
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