312 lines
11 KiB
C++
312 lines
11 KiB
C++
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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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#include "hb.hh"
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#ifndef HB_NO_PAINT
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#include "hb-paint.hh"
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static void
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hb_paint_push_transform_nil (hb_paint_funcs_t *funcs HB_UNUSED, void *paint_data HB_UNUSED,
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float xx HB_UNUSED, float xy HB_UNUSED,
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float yx HB_UNUSED, float yy HB_UNUSED,
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float x0 HB_UNUSED, float y0 HB_UNUSED,
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void *user_data HB_UNUSED) {}
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static void
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hb_paint_pop_transform_nil (hb_paint_funcs_t *funcs HB_UNUSED, void *paint_data HB_UNUSED,
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void *user_data HB_UNUSED) {}
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static void
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hb_paint_push_clip_nil (hb_paint_funcs_t *funcs HB_UNUSED, void *paint_data HB_UNUSED,
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hb_codepoint_t glyph HB_UNUSED,
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void *user_data HB_UNUSED) {}
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static void
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hb_paint_pop_clip_nil (hb_paint_funcs_t *funcs HB_UNUSED, void *paint_data HB_UNUSED,
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void *user_data HB_UNUSED) {}
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static void
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hb_paint_solid_nil (hb_paint_funcs_t *funcs HB_UNUSED, void *paint_data HB_UNUSED,
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unsigned int color_index HB_UNUSED,
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void *user_data HB_UNUSED) {}
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static void
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hb_paint_linear_gradient_nil (hb_paint_funcs_t *funcs HB_UNUSED, void *paint_data HB_UNUSED,
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hb_color_line_t *color_line HB_UNUSED,
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hb_position_t x0, hb_position_t y0 HB_UNUSED,
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hb_position_t x1, hb_position_t y1 HB_UNUSED,
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hb_position_t x2, hb_position_t y2 HB_UNUSED,
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void *user_data HB_UNUSED) {}
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static void
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hb_paint_radial_gradient_nil (hb_paint_funcs_t *funcs HB_UNUSED, void *paint_data HB_UNUSED,
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hb_color_line_t *color_line HB_UNUSED,
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hb_position_t x0, hb_position_t y0 HB_UNUSED,
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float r0 HB_UNUSED,
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hb_position_t x1 HB_UNUSED, hb_position_t y1 HB_UNUSED,
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float r1 HB_UNUSED,
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void *user_data HB_UNUSED) {}
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static void
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hb_paint_sweep_gradient_nil (hb_paint_funcs_t *funcs HB_UNUSED, void *paint_data HB_UNUSED,
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hb_color_line_t *color_line HB_UNUSED,
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hb_position_t x0, hb_position_t y0 HB_UNUSED,
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float start_angle HB_UNUSED,
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float end_angle HB_UNUSED,
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void *user_data HB_UNUSED) {}
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static void
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hb_paint_push_group_nil (hb_paint_funcs_t *funcs HB_UNUSED, void *paint_data HB_UNUSED,
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void *user_data HB_UNUSED) {}
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static void
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hb_paint_pop_group_and_composite_nil (hb_paint_funcs_t *funcs HB_UNUSED, void *paint_data HB_UNUSED,
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hb_paint_composite_mode_t mode,
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void *user_data HB_UNUSED) {}
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static bool
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_hb_paint_funcs_set_preamble (hb_paint_funcs_t *funcs,
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bool func_is_null,
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void **user_data,
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hb_destroy_func_t *destroy)
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{
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if (hb_object_is_immutable (funcs))
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{
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if (*destroy)
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(*destroy) (*user_data);
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return false;
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}
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if (func_is_null)
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{
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if (*destroy)
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(*destroy) (*user_data);
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*destroy = nullptr;
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*user_data = nullptr;
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}
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return true;
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}
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static bool
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_hb_paint_funcs_set_middle (hb_paint_funcs_t *funcs,
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void *user_data,
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hb_destroy_func_t destroy)
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{
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if (user_data && !funcs->user_data)
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{
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funcs->user_data = (decltype (funcs->user_data)) hb_calloc (1, sizeof (*funcs->user_data));
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if (unlikely (!funcs->user_data))
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goto fail;
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}
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if (destroy && !funcs->destroy)
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{
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funcs->destroy = (decltype (funcs->destroy)) hb_calloc (1, sizeof (*funcs->destroy));
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if (unlikely (!funcs->destroy))
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goto fail;
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}
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return true;
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fail:
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if (destroy)
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(destroy) (user_data);
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return false;
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}
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#define HB_PAINT_FUNC_IMPLEMENT(name) \
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\
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void \
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hb_paint_funcs_set_##name##_func (hb_paint_funcs_t *funcs, \
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hb_paint_##name##_func_t func, \
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void *user_data, \
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hb_destroy_func_t destroy) \
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{ \
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if (!_hb_paint_funcs_set_preamble (funcs, !func, &user_data, &destroy)) \
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return; \
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\
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if (funcs->destroy && funcs->destroy->name) \
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funcs->destroy->name (!funcs->user_data ? nullptr : funcs->user_data->name);\
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\
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if (!_hb_paint_funcs_set_middle (funcs, user_data, destroy)) \
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return; \
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\
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if (func) \
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funcs->func.name = func; \
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else \
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funcs->func.name = hb_paint_##name##_nil; \
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\
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if (funcs->user_data) \
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funcs->user_data->name = user_data; \
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if (funcs->destroy) \
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funcs->destroy->name = destroy; \
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}
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HB_PAINT_FUNCS_IMPLEMENT_CALLBACKS
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#undef HB_PAINT_FUNC_IMPLEMENT
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hb_paint_funcs_t *
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hb_paint_funcs_create ()
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{
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hb_paint_funcs_t *funcs;
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if (unlikely (!(funcs = hb_object_create<hb_paint_funcs_t> ())))
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return const_cast<hb_paint_funcs_t *> (&Null (hb_paint_funcs_t));
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funcs->func = Null (hb_paint_funcs_t).func;
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return funcs;
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}
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DEFINE_NULL_INSTANCE (hb_paint_funcs_t) =
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{
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HB_OBJECT_HEADER_STATIC,
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{
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#define HB_PAINT_FUNC_IMPLEMENT(name) hb_paint_##name##_nil,
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HB_PAINT_FUNCS_IMPLEMENT_CALLBACKS
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#undef HB_PAINT_FUNC_IMPLEMENT
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}
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};
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hb_paint_funcs_t *
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hb_paint_funcs_reference (hb_paint_funcs_t *funcs)
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{
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return hb_object_reference (funcs);
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}
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void
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hb_paint_funcs_destroy (hb_paint_funcs_t *funcs)
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{
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if (!hb_object_destroy (funcs)) return;
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if (funcs->destroy)
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{
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#define HB_PAINT_FUNC_IMPLEMENT(name) \
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if (funcs->destroy->name) funcs->destroy->name (!funcs->user_data ? nullptr : funcs->user_data->name);
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HB_PAINT_FUNCS_IMPLEMENT_CALLBACKS
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#undef HB_PAINT_FUNC_IMPLEMENT
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}
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hb_free (funcs->destroy);
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hb_free (funcs->user_data);
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hb_free (funcs);
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}
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void
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hb_paint_funcs_make_immutable (hb_paint_funcs_t *funcs)
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{
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if (hb_object_is_immutable (funcs))
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return;
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hb_object_make_immutable (funcs);
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}
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hb_bool_t
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hb_paint_funcs_is_immutable (hb_paint_funcs_t *funcs)
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{
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return hb_object_is_immutable (funcs);
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}
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void
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hb_paint_push_transform (hb_paint_funcs_t *funcs, void *paint_data,
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float xx, float xy,
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float yx, float yy,
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float x0, float y0)
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{
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funcs->push_transform (paint_data, xx, xy, yx, yy, x0, y0);
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}
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void
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hb_paint_pop_transform (hb_paint_funcs_t *funcs, void *paint_data)
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{
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funcs->pop_transform (paint_data);
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}
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void
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hb_paint_push_clip (hb_paint_funcs_t *funcs, void *paint_data,
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hb_codepoint_t glyph)
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{
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funcs->push_clip (paint_data, glyph);
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}
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void
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hb_paint_pop_clip (hb_paint_funcs_t *funcs, void *paint_data)
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{
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funcs->pop_clip (paint_data);
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}
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void
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hb_paint_solid (hb_paint_funcs_t *funcs, void *paint_data,
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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
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hb_paint_linear_gradient (hb_paint_funcs_t *funcs, void *paint_data,
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hb_color_line_t *color_line,
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hb_position_t x0, hb_position_t y0,
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hb_position_t x1, hb_position_t y1,
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hb_position_t x2, hb_position_t y2)
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{
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funcs->linear_gradient (paint_data, color_line, x0, y0, x1, y1, x2, y2);
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}
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void
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hb_paint_radial_gradient (hb_paint_funcs_t *funcs, void *paint_data,
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hb_color_line_t *color_line,
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hb_position_t x0, hb_position_t y0,
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float r0,
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hb_position_t x1, hb_position_t y1,
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float r1)
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{
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funcs->radial_gradient (paint_data, color_line, x0, y0, r0, y1, x1, r1);
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}
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void
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hb_paint_sweep_gradient (hb_paint_funcs_t *funcs, void *paint_data,
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hb_color_line_t *color_line,
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hb_position_t x0, hb_position_t y0,
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float start_angle, float end_angle)
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{
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funcs->sweep_gradient (paint_data, color_line, x0, y0, start_angle, end_angle);
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}
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void
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hb_paint_push_group (hb_paint_funcs_t *funcs, void *paint_data)
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{
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funcs->push_group (paint_data);
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}
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void
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hb_paint_pop_group_and_composite (hb_paint_funcs_t *funcs, void *paint_data,
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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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#endif
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