/*

 * 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-bounded.hh"

#include "hb-machinery.hh"

/*

 * This file implements 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_bounded_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_bounded_context_t *c = (hb_paint_bounded_context_t *) paint_data;

  c->push_clip ();

}

static void

hb_paint_bounded_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_bounded_context_t *c = (hb_paint_bounded_context_t *) paint_data;

  c->push_clip ();

}

static void

hb_paint_bounded_pop_clip (hb_paint_funcs_t *funcs HB_UNUSED,

         void *paint_data,

         void *user_data HB_UNUSED)

{

  hb_paint_bounded_context_t *c = (hb_paint_bounded_context_t *) paint_data;

  c->pop_clip ();

}

static void

hb_paint_bounded_push_group (hb_paint_funcs_t *funcs HB_UNUSED,

           void *paint_data,

           void *user_data HB_UNUSED)

{

  hb_paint_bounded_context_t *c = (hb_paint_bounded_context_t *) paint_data;

  c->push_group ();

}

static void

hb_paint_bounded_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_bounded_context_t *c = (hb_paint_bounded_context_t *) paint_data;

  c->pop_group (mode);

}

static hb_bool_t

hb_paint_bounded_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_bounded_context_t *c = (hb_paint_bounded_context_t *) paint_data;

  c->push_clip ();

  c->paint ();

  c->pop_clip ();

  return true;

}

static void

hb_paint_bounded_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_bounded_context_t *c = (hb_paint_bounded_context_t *) paint_data;

  c->paint ();

}

static void

hb_paint_bounded_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_bounded_context_t *c = (hb_paint_bounded_context_t *) paint_data;

  c->paint ();

}

static void

hb_paint_bounded_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_bounded_context_t *c = (hb_paint_bounded_context_t *) paint_data;

  c->paint ();

}

static void

hb_paint_bounded_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_bounded_context_t *c = (hb_paint_bounded_context_t *) paint_data;

  c->paint ();

}

static inline void free_static_paint_bounded_funcs ();

static struct hb_paint_bounded_funcs_lazy_loader_t : hb_paint_funcs_lazy_loader_t<hb_paint_bounded_funcs_lazy_loader_t>

{

  static hb_paint_funcs_t *create ()

  {

    hb_paint_funcs_t *funcs = hb_paint_funcs_create ();

    hb_paint_funcs_set_push_clip_glyph_func (funcs, hb_paint_bounded_push_clip_glyph, nullptr, nullptr);

    hb_paint_funcs_set_push_clip_rectangle_func (funcs, hb_paint_bounded_push_clip_rectangle, nullptr, nullptr);

    hb_paint_funcs_set_pop_clip_func (funcs, hb_paint_bounded_pop_clip, nullptr, nullptr);

    hb_paint_funcs_set_push_group_func (funcs, hb_paint_bounded_push_group, nullptr, nullptr);

    hb_paint_funcs_set_pop_group_func (funcs, hb_paint_bounded_pop_group, nullptr, nullptr);

    hb_paint_funcs_set_color_func (funcs, hb_paint_bounded_paint_color, nullptr, nullptr);

    hb_paint_funcs_set_image_func (funcs, hb_paint_bounded_paint_image, nullptr, nullptr);

    hb_paint_funcs_set_linear_gradient_func (funcs, hb_paint_bounded_paint_linear_gradient, nullptr, nullptr);

    hb_paint_funcs_set_radial_gradient_func (funcs, hb_paint_bounded_paint_radial_gradient, nullptr, nullptr);

    hb_paint_funcs_set_sweep_gradient_func (funcs, hb_paint_bounded_paint_sweep_gradient, nullptr, nullptr);

    hb_paint_funcs_make_immutable (funcs);

    hb_atexit (free_static_paint_bounded_funcs);

    return funcs;

  }

} static_paint_bounded_funcs;

static inline

void free_static_paint_bounded_funcs ()

{

  static_paint_bounded_funcs.free_instance ();

}

hb_paint_funcs_t *

hb_paint_bounded_get_funcs ()

{

  return static_paint_bounded_funcs.get_unconst ();

}

#endif