kc3-lang/harfbuzz/src/hb-cairo-utils.hh

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• Hash : 0c80aec1
  Author :
  Date : 2023-08-15T10:30:38
  

  [COLR] Move cycle-detection to the renderer instead of cairo
  
  Alternative fix for https://github.com/harfbuzz/harfbuzz/issues/4375
  

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• src/hb-cairo-utils.hh

• /*
   * Copyright © 2022  Red Hat, 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): Matthias Clasen
   */
  
  #ifndef HB_CAIRO_UTILS_H
  #define HB_CAIRO_UTILS_H
  
  #include "hb.hh"
  #include "hb-cairo.h"
  
  
  typedef struct
  {
    cairo_scaled_font_t *scaled_font;
    cairo_t *cr;
    hb_map_t *color_cache;
  } hb_cairo_context_t;
  
  static inline cairo_operator_t
  _hb_paint_composite_mode_to_cairo (hb_paint_composite_mode_t mode)
  {
    switch (mode)
      {
      case HB_PAINT_COMPOSITE_MODE_CLEAR: return CAIRO_OPERATOR_CLEAR;
      case HB_PAINT_COMPOSITE_MODE_SRC: return CAIRO_OPERATOR_SOURCE;
      case HB_PAINT_COMPOSITE_MODE_DEST: return CAIRO_OPERATOR_DEST;
      case HB_PAINT_COMPOSITE_MODE_SRC_OVER: return CAIRO_OPERATOR_OVER;
      case HB_PAINT_COMPOSITE_MODE_DEST_OVER: return CAIRO_OPERATOR_DEST_OVER;
      case HB_PAINT_COMPOSITE_MODE_SRC_IN: return CAIRO_OPERATOR_IN;
      case HB_PAINT_COMPOSITE_MODE_DEST_IN: return CAIRO_OPERATOR_DEST_IN;
      case HB_PAINT_COMPOSITE_MODE_SRC_OUT: return CAIRO_OPERATOR_OUT;
      case HB_PAINT_COMPOSITE_MODE_DEST_OUT: return CAIRO_OPERATOR_DEST_OUT;
      case HB_PAINT_COMPOSITE_MODE_SRC_ATOP: return CAIRO_OPERATOR_ATOP;
      case HB_PAINT_COMPOSITE_MODE_DEST_ATOP: return CAIRO_OPERATOR_DEST_ATOP;
      case HB_PAINT_COMPOSITE_MODE_XOR: return CAIRO_OPERATOR_XOR;
      case HB_PAINT_COMPOSITE_MODE_PLUS: return CAIRO_OPERATOR_ADD;
      case HB_PAINT_COMPOSITE_MODE_SCREEN: return CAIRO_OPERATOR_SCREEN;
      case HB_PAINT_COMPOSITE_MODE_OVERLAY: return CAIRO_OPERATOR_OVERLAY;
      case HB_PAINT_COMPOSITE_MODE_DARKEN: return CAIRO_OPERATOR_DARKEN;
      case HB_PAINT_COMPOSITE_MODE_LIGHTEN: return CAIRO_OPERATOR_LIGHTEN;
      case HB_PAINT_COMPOSITE_MODE_COLOR_DODGE: return CAIRO_OPERATOR_COLOR_DODGE;
      case HB_PAINT_COMPOSITE_MODE_COLOR_BURN: return CAIRO_OPERATOR_COLOR_BURN;
      case HB_PAINT_COMPOSITE_MODE_HARD_LIGHT: return CAIRO_OPERATOR_HARD_LIGHT;
      case HB_PAINT_COMPOSITE_MODE_SOFT_LIGHT: return CAIRO_OPERATOR_SOFT_LIGHT;
      case HB_PAINT_COMPOSITE_MODE_DIFFERENCE: return CAIRO_OPERATOR_DIFFERENCE;
      case HB_PAINT_COMPOSITE_MODE_EXCLUSION: return CAIRO_OPERATOR_EXCLUSION;
      case HB_PAINT_COMPOSITE_MODE_MULTIPLY: return CAIRO_OPERATOR_MULTIPLY;
      case HB_PAINT_COMPOSITE_MODE_HSL_HUE: return CAIRO_OPERATOR_HSL_HUE;
      case HB_PAINT_COMPOSITE_MODE_HSL_SATURATION: return CAIRO_OPERATOR_HSL_SATURATION;
      case HB_PAINT_COMPOSITE_MODE_HSL_COLOR: return CAIRO_OPERATOR_HSL_COLOR;
      case HB_PAINT_COMPOSITE_MODE_HSL_LUMINOSITY: return CAIRO_OPERATOR_HSL_LUMINOSITY;
      default: return CAIRO_OPERATOR_CLEAR;
      }
  }
  
  HB_INTERNAL hb_bool_t
  _hb_cairo_paint_glyph_image (hb_cairo_context_t *c,
  			     hb_blob_t *blob,
  			     unsigned width,
  			     unsigned height,
  			     hb_tag_t format,
  			     float slant,
  			     hb_glyph_extents_t *extents);
  
  HB_INTERNAL void
  _hb_cairo_paint_linear_gradient (hb_cairo_context_t *c,
  				 hb_color_line_t *color_line,
  				 float x0, float y0,
  				 float x1, float y1,
  				 float x2, float y2);
  
  HB_INTERNAL void
  _hb_cairo_paint_radial_gradient (hb_cairo_context_t *c,
  				 hb_color_line_t *color_line,
  				 float x0, float y0, float r0,
  				 float x1, float y1, float r1);
  
  HB_INTERNAL void
  _hb_cairo_paint_sweep_gradient (hb_cairo_context_t *c,
  				hb_color_line_t *color_line,
  				float x0, float y0,
  				float start_angle, float end_angle);
  
  
  #endif /* HB_CAIRO_UTILS_H */
  

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