src/hb-paint-extents.cc - third_party/harfbuzz - Git at Google

 /*
  * Copyright © 2022 Behdad Esfahbod
  *
  *  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.
  */

 #include "hb.hh"

 #ifndef HB_NO_PAINT

 #include "hb-paint-extents.hh"

 #include "hb-draw.h"

 #include "hb-machinery.hh"


 /*
  * This file implements bounds-extraction as well as boundedness
  * computation of COLRv1 fonts as described in:
  *
  * https://learn.microsoft.com/en-us/typography/opentype/spec/colr#glyph-metrics-and-boundedness
  */

 static void
 hb_paint_extents_push_transform (hb_paint_funcs_t *funcs HB_UNUSED,
 				 void *paint_data,
 				 float xx, float yx,
 				 float xy, float yy,
 				 float dx, float dy,
 				 void *user_data HB_UNUSED)
 {
   hb_paint_extents_context_t *c = (hb_paint_extents_context_t *) paint_data;

   c->push_transform (hb_transform_t {xx, yx, xy, yy, dx, dy});
 }

 static void
 hb_paint_extents_pop_transform (hb_paint_funcs_t *funcs HB_UNUSED,
 			        void *paint_data,
 				void *user_data HB_UNUSED)
 {
   hb_paint_extents_context_t *c = (hb_paint_extents_context_t *) paint_data;

   c->pop_transform ();
 }

 static void
 hb_draw_extents_move_to (hb_draw_funcs_t *dfuncs HB_UNUSED,
 			 void *data,
 			 hb_draw_state_t *st,
 			 float to_x, float to_y,
 			 void *user_data HB_UNUSED)
 {
   hb_extents_t *extents = (hb_extents_t *) data;

   extents->add_point (to_x, to_y);
 }

 static void
 hb_draw_extents_line_to (hb_draw_funcs_t *dfuncs HB_UNUSED,
 			 void *data,
 			 hb_draw_state_t *st,
 			 float to_x, float to_y,
 			 void *user_data HB_UNUSED)
 {
   hb_extents_t *extents = (hb_extents_t *) data;

   extents->add_point (to_x, to_y);
 }

 static void
 hb_draw_extents_quadratic_to (hb_draw_funcs_t *dfuncs HB_UNUSED,
 			      void *data,
 			      hb_draw_state_t *st,
 			      float control_x, float control_y,
 			      float to_x, float to_y,
 			      void *user_data HB_UNUSED)
 {
   hb_extents_t *extents = (hb_extents_t *) data;

   extents->add_point (control_x, control_y);
   extents->add_point (to_x, to_y);
 }

 static void
 hb_draw_extents_cubic_to (hb_draw_funcs_t *dfuncs HB_UNUSED,
 			  void *data,
 			  hb_draw_state_t *st,
 			  float control1_x, float control1_y,
 			  float control2_x, float control2_y,
 			  float to_x, float to_y,
 			  void *user_data HB_UNUSED)
 {
   hb_extents_t *extents = (hb_extents_t *) data;

   extents->add_point (control1_x, control1_y);
   extents->add_point (control2_x, control2_y);
   extents->add_point (to_x, to_y);
 }

 static inline void free_static_draw_extents_funcs ();

 static struct hb_draw_extents_funcs_lazy_loader_t : hb_draw_funcs_lazy_loader_t<hb_draw_extents_funcs_lazy_loader_t>
 {
   static hb_draw_funcs_t *create ()
   {
     hb_draw_funcs_t *funcs = hb_draw_funcs_create ();

     hb_draw_funcs_set_move_to_func (funcs, hb_draw_extents_move_to, nullptr, nullptr);
     hb_draw_funcs_set_line_to_func (funcs, hb_draw_extents_line_to, nullptr, nullptr);
     hb_draw_funcs_set_quadratic_to_func (funcs, hb_draw_extents_quadratic_to, nullptr, nullptr);
     hb_draw_funcs_set_cubic_to_func (funcs, hb_draw_extents_cubic_to, nullptr, nullptr);

     hb_draw_funcs_make_immutable (funcs);

     hb_atexit (free_static_draw_extents_funcs);

     return funcs;
   }
 } static_draw_extents_funcs;

 static inline
 void free_static_draw_extents_funcs ()
 {
   static_draw_extents_funcs.free_instance ();
 }

 static hb_draw_funcs_t *
 hb_draw_extents_get_funcs ()
 {
   return static_draw_extents_funcs.get_unconst ();
 }

 static void
 hb_paint_extents_push_clip_glyph (hb_paint_funcs_t *funcs HB_UNUSED,
 				  void *paint_data,
 				  hb_codepoint_t glyph,
 				  hb_font_t *font,
 				  void *user_data HB_UNUSED)
 {
   hb_paint_extents_context_t *c = (hb_paint_extents_context_t *) paint_data;

   hb_extents_t extents;
   hb_draw_funcs_t *draw_extent_funcs = hb_draw_extents_get_funcs ();
   hb_font_draw_glyph (font, glyph, draw_extent_funcs, &extents);
   c->push_clip (extents);
 }

 static void
 hb_paint_extents_push_clip_rectangle (hb_paint_funcs_t *funcs HB_UNUSED,
 				      void *paint_data,
 				      float xmin, float ymin, float xmax, float ymax,
 				      void *user_data)
 {
   hb_paint_extents_context_t *c = (hb_paint_extents_context_t *) paint_data;

   hb_extents_t extents = {xmin, ymin, xmax, ymax};
   c->push_clip (extents);
 }

 static void
 hb_paint_extents_pop_clip (hb_paint_funcs_t *funcs HB_UNUSED,
 			   void *paint_data,
 			   void *user_data HB_UNUSED)
 {
   hb_paint_extents_context_t *c = (hb_paint_extents_context_t *) paint_data;

   c->pop_clip ();
 }

 static void
 hb_paint_extents_push_group (hb_paint_funcs_t *funcs HB_UNUSED,
 			     void *paint_data,
 			     void *user_data HB_UNUSED)
 {
   hb_paint_extents_context_t *c = (hb_paint_extents_context_t *) paint_data;

   c->push_group ();
 }

 static void
 hb_paint_extents_pop_group (hb_paint_funcs_t *funcs HB_UNUSED,
 			    void *paint_data,
 			    hb_paint_composite_mode_t mode,
 			    void *user_data HB_UNUSED)
 {
   hb_paint_extents_context_t *c = (hb_paint_extents_context_t *) paint_data;

   c->pop_group (mode);
 }

 static hb_bool_t
 hb_paint_extents_paint_image (hb_paint_funcs_t *funcs HB_UNUSED,
 			      void *paint_data,
 			      hb_blob_t *blob HB_UNUSED,
 			      unsigned int width HB_UNUSED,
 			      unsigned int height HB_UNUSED,
 			      hb_tag_t format HB_UNUSED,
 			      float slant HB_UNUSED,
 			      hb_glyph_extents_t *glyph_extents,
 			      void *user_data HB_UNUSED)
 {
   hb_paint_extents_context_t *c = (hb_paint_extents_context_t *) paint_data;

   hb_extents_t extents = {(float) glyph_extents->x_bearing,
 			  (float) glyph_extents->y_bearing + glyph_extents->height,
 			  (float) glyph_extents->x_bearing + glyph_extents->width,
 			  (float) glyph_extents->y_bearing};
   c->push_clip (extents);
   c->paint ();
   c->pop_clip ();

   return true;
 }

 static void
 hb_paint_extents_paint_color (hb_paint_funcs_t *funcs HB_UNUSED,
 			      void *paint_data,
 			      hb_bool_t use_foreground HB_UNUSED,
 			      hb_color_t color HB_UNUSED,
 			      void *user_data HB_UNUSED)
 {
   hb_paint_extents_context_t *c = (hb_paint_extents_context_t *) paint_data;

   c->paint ();
 }

 static void
 hb_paint_extents_paint_linear_gradient (hb_paint_funcs_t *funcs HB_UNUSED,
 				        void *paint_data,
 				        hb_color_line_t *color_line HB_UNUSED,
 				        float x0 HB_UNUSED, float y0 HB_UNUSED,
 				        float x1 HB_UNUSED, float y1 HB_UNUSED,
 				        float x2 HB_UNUSED, float y2 HB_UNUSED,
 				        void *user_data HB_UNUSED)
 {
   hb_paint_extents_context_t *c = (hb_paint_extents_context_t *) paint_data;

   c->paint ();
 }

 static void
 hb_paint_extents_paint_radial_gradient (hb_paint_funcs_t *funcs HB_UNUSED,
 				        void *paint_data,
 				        hb_color_line_t *color_line HB_UNUSED,
 				        float x0 HB_UNUSED, float y0 HB_UNUSED, float r0 HB_UNUSED,
 				        float x1 HB_UNUSED, float y1 HB_UNUSED, float r1 HB_UNUSED,
 				        void *user_data HB_UNUSED)
 {
   hb_paint_extents_context_t *c = (hb_paint_extents_context_t *) paint_data;

   c->paint ();
 }

 static void
 hb_paint_extents_paint_sweep_gradient (hb_paint_funcs_t *funcs HB_UNUSED,
 				       void *paint_data,
 				       hb_color_line_t *color_line HB_UNUSED,
 				       float cx HB_UNUSED, float cy HB_UNUSED,
 				       float start_angle HB_UNUSED,
 				       float end_angle HB_UNUSED,
 				       void *user_data HB_UNUSED)
 {
   hb_paint_extents_context_t *c = (hb_paint_extents_context_t *) paint_data;

   c->paint ();
 }

 static inline void free_static_paint_extents_funcs ();

 static struct hb_paint_extents_funcs_lazy_loader_t : hb_paint_funcs_lazy_loader_t<hb_paint_extents_funcs_lazy_loader_t>
 {
   static hb_paint_funcs_t *create ()
   {
     hb_paint_funcs_t *funcs = hb_paint_funcs_create ();

     hb_paint_funcs_set_push_transform_func (funcs, hb_paint_extents_push_transform, nullptr, nullptr);
     hb_paint_funcs_set_pop_transform_func (funcs, hb_paint_extents_pop_transform, nullptr, nullptr);
     hb_paint_funcs_set_push_clip_glyph_func (funcs, hb_paint_extents_push_clip_glyph, nullptr, nullptr);
     hb_paint_funcs_set_push_clip_rectangle_func (funcs, hb_paint_extents_push_clip_rectangle, nullptr, nullptr);
     hb_paint_funcs_set_pop_clip_func (funcs, hb_paint_extents_pop_clip, nullptr, nullptr);
     hb_paint_funcs_set_push_group_func (funcs, hb_paint_extents_push_group, nullptr, nullptr);
     hb_paint_funcs_set_pop_group_func (funcs, hb_paint_extents_pop_group, nullptr, nullptr);
     hb_paint_funcs_set_color_func (funcs, hb_paint_extents_paint_color, nullptr, nullptr);
     hb_paint_funcs_set_image_func (funcs, hb_paint_extents_paint_image, nullptr, nullptr);
     hb_paint_funcs_set_linear_gradient_func (funcs, hb_paint_extents_paint_linear_gradient, nullptr, nullptr);
     hb_paint_funcs_set_radial_gradient_func (funcs, hb_paint_extents_paint_radial_gradient, nullptr, nullptr);
     hb_paint_funcs_set_sweep_gradient_func (funcs, hb_paint_extents_paint_sweep_gradient, nullptr, nullptr);

     hb_paint_funcs_make_immutable (funcs);

     hb_atexit (free_static_paint_extents_funcs);

     return funcs;
   }
 } static_paint_extents_funcs;

 static inline
 void free_static_paint_extents_funcs ()
 {
   static_paint_extents_funcs.free_instance ();
 }

 hb_paint_funcs_t *
 hb_paint_extents_get_funcs ()
 {
   return static_paint_extents_funcs.get_unconst ();
 }


 #endif
	/*
	* Copyright © 2022 Behdad Esfahbod
	*
	* 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.
	*/

	#include "hb.hh"

	#ifndef HB_NO_PAINT

	#include "hb-paint-extents.hh"

	#include "hb-draw.h"

	#include "hb-machinery.hh"


	/*
	* This file implements bounds-extraction as well as boundedness
	* computation of COLRv1 fonts as described in:
	*
	* https://learn.microsoft.com/en-us/typography/opentype/spec/colr#glyph-metrics-and-boundedness
	*/

	static void
	hb_paint_extents_push_transform (hb_paint_funcs_t *funcs HB_UNUSED,
	void *paint_data,
	float xx, float yx,
	float xy, float yy,
	float dx, float dy,
	void *user_data HB_UNUSED)
	{
	hb_paint_extents_context_t c = (hb_paint_extents_context_t ) paint_data;

	c->push_transform (hb_transform_t {xx, yx, xy, yy, dx, dy});
	}

	static void
	hb_paint_extents_pop_transform (hb_paint_funcs_t *funcs HB_UNUSED,
	void *paint_data,
	void *user_data HB_UNUSED)
	{
	hb_paint_extents_context_t c = (hb_paint_extents_context_t ) paint_data;

	c->pop_transform ();
	}

	static void
	hb_draw_extents_move_to (hb_draw_funcs_t *dfuncs HB_UNUSED,
	void *data,
	hb_draw_state_t *st,
	float to_x, float to_y,
	void *user_data HB_UNUSED)
	{
	hb_extents_t extents = (hb_extents_t ) data;

	extents->add_point (to_x, to_y);
	}

	static void
	hb_draw_extents_line_to (hb_draw_funcs_t *dfuncs HB_UNUSED,
	void *data,
	hb_draw_state_t *st,
	float to_x, float to_y,
	void *user_data HB_UNUSED)
	{
	hb_extents_t extents = (hb_extents_t ) data;

	extents->add_point (to_x, to_y);
	}

	static void
	hb_draw_extents_quadratic_to (hb_draw_funcs_t *dfuncs HB_UNUSED,
	void *data,
	hb_draw_state_t *st,
	float control_x, float control_y,
	float to_x, float to_y,
	void *user_data HB_UNUSED)
	{
	hb_extents_t extents = (hb_extents_t ) data;

	extents->add_point (control_x, control_y);
	extents->add_point (to_x, to_y);
	}

	static void
	hb_draw_extents_cubic_to (hb_draw_funcs_t *dfuncs HB_UNUSED,
	void *data,
	hb_draw_state_t *st,
	float control1_x, float control1_y,
	float control2_x, float control2_y,
	float to_x, float to_y,
	void *user_data HB_UNUSED)
	{
	hb_extents_t extents = (hb_extents_t ) data;

	extents->add_point (control1_x, control1_y);
	extents->add_point (control2_x, control2_y);
	extents->add_point (to_x, to_y);
	}

	static inline void free_static_draw_extents_funcs ();

	static struct hb_draw_extents_funcs_lazy_loader_t : hb_draw_funcs_lazy_loader_t<hb_draw_extents_funcs_lazy_loader_t>
	{
	static hb_draw_funcs_t *create ()
	{
	hb_draw_funcs_t *funcs = hb_draw_funcs_create ();

	hb_draw_funcs_set_move_to_func (funcs, hb_draw_extents_move_to, nullptr, nullptr);
	hb_draw_funcs_set_line_to_func (funcs, hb_draw_extents_line_to, nullptr, nullptr);
	hb_draw_funcs_set_quadratic_to_func (funcs, hb_draw_extents_quadratic_to, nullptr, nullptr);
	hb_draw_funcs_set_cubic_to_func (funcs, hb_draw_extents_cubic_to, nullptr, nullptr);

	hb_draw_funcs_make_immutable (funcs);

	hb_atexit (free_static_draw_extents_funcs);

	return funcs;
	}
	} static_draw_extents_funcs;

	static inline
	void free_static_draw_extents_funcs ()
	{
	static_draw_extents_funcs.free_instance ();
	}

	static hb_draw_funcs_t *
	hb_draw_extents_get_funcs ()
	{
	return static_draw_extents_funcs.get_unconst ();
	}

	static void
	hb_paint_extents_push_clip_glyph (hb_paint_funcs_t *funcs HB_UNUSED,
	void *paint_data,
	hb_codepoint_t glyph,
	hb_font_t *font,
	void *user_data HB_UNUSED)
	{
	hb_paint_extents_context_t c = (hb_paint_extents_context_t ) paint_data;

	hb_extents_t extents;
	hb_draw_funcs_t *draw_extent_funcs = hb_draw_extents_get_funcs ();
	hb_font_draw_glyph (font, glyph, draw_extent_funcs, &extents);
	c->push_clip (extents);
	}

	static void
	hb_paint_extents_push_clip_rectangle (hb_paint_funcs_t *funcs HB_UNUSED,
	void *paint_data,
	float xmin, float ymin, float xmax, float ymax,
	void *user_data)
	{
	hb_paint_extents_context_t c = (hb_paint_extents_context_t ) paint_data;

	hb_extents_t extents = {xmin, ymin, xmax, ymax};
	c->push_clip (extents);
	}

	static void
	hb_paint_extents_pop_clip (hb_paint_funcs_t *funcs HB_UNUSED,
	void *paint_data,
	void *user_data HB_UNUSED)
	{
	hb_paint_extents_context_t c = (hb_paint_extents_context_t ) paint_data;

	c->pop_clip ();
	}

	static void
	hb_paint_extents_push_group (hb_paint_funcs_t *funcs HB_UNUSED,
	void *paint_data,
	void *user_data HB_UNUSED)
	{
	hb_paint_extents_context_t c = (hb_paint_extents_context_t ) paint_data;

	c->push_group ();
	}

	static void
	hb_paint_extents_pop_group (hb_paint_funcs_t *funcs HB_UNUSED,
	void *paint_data,
	hb_paint_composite_mode_t mode,
	void *user_data HB_UNUSED)
	{
	hb_paint_extents_context_t c = (hb_paint_extents_context_t ) paint_data;

	c->pop_group (mode);
	}

	static hb_bool_t
	hb_paint_extents_paint_image (hb_paint_funcs_t *funcs HB_UNUSED,
	void *paint_data,
	hb_blob_t *blob HB_UNUSED,
	unsigned int width HB_UNUSED,
	unsigned int height HB_UNUSED,
	hb_tag_t format HB_UNUSED,
	float slant HB_UNUSED,
	hb_glyph_extents_t *glyph_extents,
	void *user_data HB_UNUSED)
	{
	hb_paint_extents_context_t c = (hb_paint_extents_context_t ) paint_data;

	hb_extents_t extents = {(float) glyph_extents->x_bearing,
	(float) glyph_extents->y_bearing + glyph_extents->height,
	(float) glyph_extents->x_bearing + glyph_extents->width,
	(float) glyph_extents->y_bearing};
	c->push_clip (extents);
	c->paint ();
	c->pop_clip ();

	return true;
	}

	static void
	hb_paint_extents_paint_color (hb_paint_funcs_t *funcs HB_UNUSED,
	void *paint_data,
	hb_bool_t use_foreground HB_UNUSED,
	hb_color_t color HB_UNUSED,
	void *user_data HB_UNUSED)
	{
	hb_paint_extents_context_t c = (hb_paint_extents_context_t ) paint_data;

	c->paint ();
	}

	static void
	hb_paint_extents_paint_linear_gradient (hb_paint_funcs_t *funcs HB_UNUSED,
	void *paint_data,
	hb_color_line_t *color_line HB_UNUSED,
	float x0 HB_UNUSED, float y0 HB_UNUSED,
	float x1 HB_UNUSED, float y1 HB_UNUSED,
	float x2 HB_UNUSED, float y2 HB_UNUSED,
	void *user_data HB_UNUSED)
	{
	hb_paint_extents_context_t c = (hb_paint_extents_context_t ) paint_data;

	c->paint ();
	}

	static void
	hb_paint_extents_paint_radial_gradient (hb_paint_funcs_t *funcs HB_UNUSED,
	void *paint_data,
	hb_color_line_t *color_line HB_UNUSED,
	float x0 HB_UNUSED, float y0 HB_UNUSED, float r0 HB_UNUSED,
	float x1 HB_UNUSED, float y1 HB_UNUSED, float r1 HB_UNUSED,
	void *user_data HB_UNUSED)
	{
	hb_paint_extents_context_t c = (hb_paint_extents_context_t ) paint_data;

	c->paint ();
	}

	static void
	hb_paint_extents_paint_sweep_gradient (hb_paint_funcs_t *funcs HB_UNUSED,
	void *paint_data,
	hb_color_line_t *color_line HB_UNUSED,
	float cx HB_UNUSED, float cy HB_UNUSED,
	float start_angle HB_UNUSED,
	float end_angle HB_UNUSED,
	void *user_data HB_UNUSED)
	{
	hb_paint_extents_context_t c = (hb_paint_extents_context_t ) paint_data;

	c->paint ();
	}

	static inline void free_static_paint_extents_funcs ();

	static struct hb_paint_extents_funcs_lazy_loader_t : hb_paint_funcs_lazy_loader_t<hb_paint_extents_funcs_lazy_loader_t>
	{
	static hb_paint_funcs_t *create ()
	{
	hb_paint_funcs_t *funcs = hb_paint_funcs_create ();

	hb_paint_funcs_set_push_transform_func (funcs, hb_paint_extents_push_transform, nullptr, nullptr);
	hb_paint_funcs_set_pop_transform_func (funcs, hb_paint_extents_pop_transform, nullptr, nullptr);
	hb_paint_funcs_set_push_clip_glyph_func (funcs, hb_paint_extents_push_clip_glyph, nullptr, nullptr);
	hb_paint_funcs_set_push_clip_rectangle_func (funcs, hb_paint_extents_push_clip_rectangle, nullptr, nullptr);
	hb_paint_funcs_set_pop_clip_func (funcs, hb_paint_extents_pop_clip, nullptr, nullptr);
	hb_paint_funcs_set_push_group_func (funcs, hb_paint_extents_push_group, nullptr, nullptr);
	hb_paint_funcs_set_pop_group_func (funcs, hb_paint_extents_pop_group, nullptr, nullptr);
	hb_paint_funcs_set_color_func (funcs, hb_paint_extents_paint_color, nullptr, nullptr);
	hb_paint_funcs_set_image_func (funcs, hb_paint_extents_paint_image, nullptr, nullptr);
	hb_paint_funcs_set_linear_gradient_func (funcs, hb_paint_extents_paint_linear_gradient, nullptr, nullptr);
	hb_paint_funcs_set_radial_gradient_func (funcs, hb_paint_extents_paint_radial_gradient, nullptr, nullptr);
	hb_paint_funcs_set_sweep_gradient_func (funcs, hb_paint_extents_paint_sweep_gradient, nullptr, nullptr);

	hb_paint_funcs_make_immutable (funcs);

	hb_atexit (free_static_paint_extents_funcs);

	return funcs;
	}
	} static_paint_extents_funcs;

	static inline
	void free_static_paint_extents_funcs ()
	{
	static_paint_extents_funcs.free_instance ();
	}

	hb_paint_funcs_t *
	hb_paint_extents_get_funcs ()
	{
	return static_paint_extents_funcs.get_unconst ();
	}


	#endif