summaryrefslogtreecommitdiffstats
path: root/gfx/harfbuzz/src/hb-draw.h
diff options
context:
space:
mode:
Diffstat (limited to 'gfx/harfbuzz/src/hb-draw.h')
-rw-r--r--gfx/harfbuzz/src/hb-draw.h340
1 files changed, 340 insertions, 0 deletions
diff --git a/gfx/harfbuzz/src/hb-draw.h b/gfx/harfbuzz/src/hb-draw.h
new file mode 100644
index 0000000000..9ca0b4006e
--- /dev/null
+++ b/gfx/harfbuzz/src/hb-draw.h
@@ -0,0 +1,340 @@
+/*
+ * Copyright © 2019-2020 Ebrahim Byagowi
+ *
+ * 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.
+ */
+
+#if !defined(HB_H_IN) && !defined(HB_NO_SINGLE_HEADER_ERROR)
+#error "Include <hb.h> instead."
+#endif
+
+#ifndef HB_DRAW_H
+#define HB_DRAW_H
+
+#include "hb.h"
+
+HB_BEGIN_DECLS
+
+
+/**
+ * hb_draw_state_t
+ * @path_open: Whether there is an open path
+ * @path_start_x: X component of the start of current path
+ * @path_start_y: Y component of the start of current path
+ * @current_x: X component of current point
+ * @current_y: Y component of current point
+ *
+ * Current drawing state.
+ *
+ * Since: 4.0.0
+ **/
+typedef struct hb_draw_state_t {
+ hb_bool_t path_open;
+
+ float path_start_x;
+ float path_start_y;
+
+ float current_x;
+ float current_y;
+
+ /*< private >*/
+ hb_var_num_t reserved1;
+ hb_var_num_t reserved2;
+ hb_var_num_t reserved3;
+ hb_var_num_t reserved4;
+ hb_var_num_t reserved5;
+ hb_var_num_t reserved6;
+ hb_var_num_t reserved7;
+} hb_draw_state_t;
+
+/**
+ * HB_DRAW_STATE_DEFAULT:
+ *
+ * The default #hb_draw_state_t at the start of glyph drawing.
+ */
+#define HB_DRAW_STATE_DEFAULT {0, 0.f, 0.f, 0.f, 0.f, {0.}, {0.}, {0.}}
+
+
+/**
+ * hb_draw_funcs_t:
+ *
+ * Glyph draw callbacks.
+ *
+ * #hb_draw_move_to_func_t, #hb_draw_line_to_func_t and
+ * #hb_draw_cubic_to_func_t calls are necessary to be defined but we translate
+ * #hb_draw_quadratic_to_func_t calls to #hb_draw_cubic_to_func_t if the
+ * callback isn't defined.
+ *
+ * Since: 4.0.0
+ **/
+
+typedef struct hb_draw_funcs_t hb_draw_funcs_t;
+
+
+/**
+ * hb_draw_move_to_func_t:
+ * @dfuncs: draw functions object
+ * @draw_data: The data accompanying the draw functions in hb_font_draw_glyph()
+ * @st: current draw state
+ * @to_x: X component of target point
+ * @to_y: Y component of target point
+ * @user_data: User data pointer passed to hb_draw_funcs_set_move_to_func()
+ *
+ * A virtual method for the #hb_draw_funcs_t to perform a "move-to" draw
+ * operation.
+ *
+ * Since: 4.0.0
+ *
+ **/
+typedef void (*hb_draw_move_to_func_t) (hb_draw_funcs_t *dfuncs, void *draw_data,
+ hb_draw_state_t *st,
+ float to_x, float to_y,
+ void *user_data);
+
+/**
+ * hb_draw_line_to_func_t:
+ * @dfuncs: draw functions object
+ * @draw_data: The data accompanying the draw functions in hb_font_draw_glyph()
+ * @st: current draw state
+ * @to_x: X component of target point
+ * @to_y: Y component of target point
+ * @user_data: User data pointer passed to hb_draw_funcs_set_line_to_func()
+ *
+ * A virtual method for the #hb_draw_funcs_t to perform a "line-to" draw
+ * operation.
+ *
+ * Since: 4.0.0
+ *
+ **/
+typedef void (*hb_draw_line_to_func_t) (hb_draw_funcs_t *dfuncs, void *draw_data,
+ hb_draw_state_t *st,
+ float to_x, float to_y,
+ void *user_data);
+
+/**
+ * hb_draw_quadratic_to_func_t:
+ * @dfuncs: draw functions object
+ * @draw_data: The data accompanying the draw functions in hb_font_draw_glyph()
+ * @st: current draw state
+ * @control_x: X component of control point
+ * @control_y: Y component of control point
+ * @to_x: X component of target point
+ * @to_y: Y component of target point
+ * @user_data: User data pointer passed to hb_draw_funcs_set_quadratic_to_func()
+ *
+ * A virtual method for the #hb_draw_funcs_t to perform a "quadratic-to" draw
+ * operation.
+ *
+ * Since: 4.0.0
+ *
+ **/
+typedef void (*hb_draw_quadratic_to_func_t) (hb_draw_funcs_t *dfuncs, void *draw_data,
+ hb_draw_state_t *st,
+ float control_x, float control_y,
+ float to_x, float to_y,
+ void *user_data);
+
+/**
+ * hb_draw_cubic_to_func_t:
+ * @dfuncs: draw functions object
+ * @draw_data: The data accompanying the draw functions in hb_font_draw_glyph()
+ * @st: current draw state
+ * @control1_x: X component of first control point
+ * @control1_y: Y component of first control point
+ * @control2_x: X component of second control point
+ * @control2_y: Y component of second control point
+ * @to_x: X component of target point
+ * @to_y: Y component of target point
+ * @user_data: User data pointer passed to hb_draw_funcs_set_cubic_to_func()
+ *
+ * A virtual method for the #hb_draw_funcs_t to perform a "cubic-to" draw
+ * operation.
+ *
+ * Since: 4.0.0
+ *
+ **/
+typedef void (*hb_draw_cubic_to_func_t) (hb_draw_funcs_t *dfuncs, void *draw_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_draw_close_path_func_t:
+ * @dfuncs: draw functions object
+ * @draw_data: The data accompanying the draw functions in hb_font_draw_glyph()
+ * @st: current draw state
+ * @user_data: User data pointer passed to hb_draw_funcs_set_close_path_func()
+ *
+ * A virtual method for the #hb_draw_funcs_t to perform a "close-path" draw
+ * operation.
+ *
+ * Since: 4.0.0
+ *
+ **/
+typedef void (*hb_draw_close_path_func_t) (hb_draw_funcs_t *dfuncs, void *draw_data,
+ hb_draw_state_t *st,
+ void *user_data);
+
+/**
+ * hb_draw_funcs_set_move_to_func:
+ * @dfuncs: draw functions object
+ * @func: (closure user_data) (destroy destroy) (scope notified): move-to callback
+ * @user_data: Data to pass to @func
+ * @destroy: (nullable): The function to call when @user_data is not needed anymore
+ *
+ * Sets move-to callback to the draw functions object.
+ *
+ * Since: 4.0.0
+ **/
+HB_EXTERN void
+hb_draw_funcs_set_move_to_func (hb_draw_funcs_t *dfuncs,
+ hb_draw_move_to_func_t func,
+ void *user_data, hb_destroy_func_t destroy);
+
+/**
+ * hb_draw_funcs_set_line_to_func:
+ * @dfuncs: draw functions object
+ * @func: (closure user_data) (destroy destroy) (scope notified): line-to callback
+ * @user_data: Data to pass to @func
+ * @destroy: (nullable): The function to call when @user_data is not needed anymore
+ *
+ * Sets line-to callback to the draw functions object.
+ *
+ * Since: 4.0.0
+ **/
+HB_EXTERN void
+hb_draw_funcs_set_line_to_func (hb_draw_funcs_t *dfuncs,
+ hb_draw_line_to_func_t func,
+ void *user_data, hb_destroy_func_t destroy);
+
+/**
+ * hb_draw_funcs_set_quadratic_to_func:
+ * @dfuncs: draw functions object
+ * @func: (closure user_data) (destroy destroy) (scope notified): quadratic-to callback
+ * @user_data: Data to pass to @func
+ * @destroy: (nullable): The function to call when @user_data is not needed anymore
+ *
+ * Sets quadratic-to callback to the draw functions object.
+ *
+ * Since: 4.0.0
+ **/
+HB_EXTERN void
+hb_draw_funcs_set_quadratic_to_func (hb_draw_funcs_t *dfuncs,
+ hb_draw_quadratic_to_func_t func,
+ void *user_data, hb_destroy_func_t destroy);
+
+/**
+ * hb_draw_funcs_set_cubic_to_func:
+ * @dfuncs: draw functions
+ * @func: (closure user_data) (destroy destroy) (scope notified): cubic-to callback
+ * @user_data: Data to pass to @func
+ * @destroy: (nullable): The function to call when @user_data is not needed anymore
+ *
+ * Sets cubic-to callback to the draw functions object.
+ *
+ * Since: 4.0.0
+ **/
+HB_EXTERN void
+hb_draw_funcs_set_cubic_to_func (hb_draw_funcs_t *dfuncs,
+ hb_draw_cubic_to_func_t func,
+ void *user_data, hb_destroy_func_t destroy);
+
+/**
+ * hb_draw_funcs_set_close_path_func:
+ * @dfuncs: draw functions object
+ * @func: (closure user_data) (destroy destroy) (scope notified): close-path callback
+ * @user_data: Data to pass to @func
+ * @destroy: (nullable): The function to call when @user_data is not needed anymore
+ *
+ * Sets close-path callback to the draw functions object.
+ *
+ * Since: 4.0.0
+ **/
+HB_EXTERN void
+hb_draw_funcs_set_close_path_func (hb_draw_funcs_t *dfuncs,
+ hb_draw_close_path_func_t func,
+ void *user_data, hb_destroy_func_t destroy);
+
+
+HB_EXTERN hb_draw_funcs_t *
+hb_draw_funcs_create (void);
+
+HB_EXTERN hb_draw_funcs_t *
+hb_draw_funcs_get_empty (void);
+
+HB_EXTERN hb_draw_funcs_t *
+hb_draw_funcs_reference (hb_draw_funcs_t *dfuncs);
+
+HB_EXTERN void
+hb_draw_funcs_destroy (hb_draw_funcs_t *dfuncs);
+
+HB_EXTERN hb_bool_t
+hb_draw_funcs_set_user_data (hb_draw_funcs_t *dfuncs,
+ hb_user_data_key_t *key,
+ void * data,
+ hb_destroy_func_t destroy,
+ hb_bool_t replace);
+
+
+HB_EXTERN void *
+hb_draw_funcs_get_user_data (const hb_draw_funcs_t *dfuncs,
+ hb_user_data_key_t *key);
+
+HB_EXTERN void
+hb_draw_funcs_make_immutable (hb_draw_funcs_t *dfuncs);
+
+HB_EXTERN hb_bool_t
+hb_draw_funcs_is_immutable (hb_draw_funcs_t *dfuncs);
+
+
+HB_EXTERN void
+hb_draw_move_to (hb_draw_funcs_t *dfuncs, void *draw_data,
+ hb_draw_state_t *st,
+ float to_x, float to_y);
+
+HB_EXTERN void
+hb_draw_line_to (hb_draw_funcs_t *dfuncs, void *draw_data,
+ hb_draw_state_t *st,
+ float to_x, float to_y);
+
+HB_EXTERN void
+hb_draw_quadratic_to (hb_draw_funcs_t *dfuncs, void *draw_data,
+ hb_draw_state_t *st,
+ float control_x, float control_y,
+ float to_x, float to_y);
+
+HB_EXTERN void
+hb_draw_cubic_to (hb_draw_funcs_t *dfuncs, void *draw_data,
+ hb_draw_state_t *st,
+ float control1_x, float control1_y,
+ float control2_x, float control2_y,
+ float to_x, float to_y);
+
+HB_EXTERN void
+hb_draw_close_path (hb_draw_funcs_t *dfuncs, void *draw_data,
+ hb_draw_state_t *st);
+
+
+HB_END_DECLS
+
+#endif /* HB_DRAW_H */