cairo.h

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// SPDX-FileCopyrightText: © 2019-2020, 2022 Alexandros Theodotou <alex@zrythm.org>
// SPDX-License-Identifier: LicenseRef-ZrythmLicense
 
#ifndef __UTILS_CAIRO_H__
#define __UTILS_CAIRO_H__
 
#include <gtk/gtk.h>
 
typedef struct Dictionary Dictionary;
 
typedef struct CairoCaches
{
  Dictionary * icon_surface_dict;
} CairoCaches;
 
#define CAIRO_CACHES (ZRYTHM->cairo_caches)
 
#define Z_CAIRO_FONT "Bold 9"
 
#define Z_CAIRO_TEXT_PADDING 2
 
#if 0
void
z_cairo_draw_selection_with_color (
  cairo_t * cr,
  GdkRGBA * color,
  double    start_x,
  double    start_y,
  double    offset_x,
  double    offset_y);
 
void
z_cairo_draw_selection (
  cairo_t * cr,
  double    start_x,
  double    start_y,
  double    offset_x,
  double    offset_y);
#endif
 
void
z_cairo_draw_horizontal_line (
  cairo_t * cr,
  double    y,
  double    from_x,
  double    to_x,
  double    line_width,
  double    alpha);
 
void
z_cairo_draw_vertical_line (
  cairo_t * cr,
  double    x,
  double    from_y,
  double    to_y,
  double    line_width);
 
static inline void
z_cairo_rounded_rectangle (
  cairo_t * cr,
  double    x,
  double    y,
  double    width,
  double    height,
  double    aspect,
  double    corner_radius)
{
  double radius = corner_radius / aspect;
  double degrees = G_PI / 180.0;
 
  cairo_new_sub_path (cr);
  cairo_arc (
    cr, x + width - radius, y + radius, radius, -90 * degrees,
    0 * degrees);
  cairo_arc (
    cr, x + width - radius, y + height - radius, radius,
    0 * degrees, 90 * degrees);
  cairo_arc (
    cr, x + radius, y + height - radius, radius, 90 * degrees,
    180 * degrees);
  cairo_arc (
    cr, x + radius, y + radius, radius, 180 * degrees,
    270 * degrees);
  cairo_close_path (cr);
}
 
#define z_cairo_get_text_extents_for_widget( \
  _widget, _layout, _text, _width, _height) \
  _z_cairo_get_text_extents_for_widget ( \
    (GtkWidget *) _widget, _layout, _text, _width, _height)
 
void
_z_cairo_get_text_extents_for_widget (
  GtkWidget *   widget,
  PangoLayout * layout,
  const char *  text,
  int *         width,
  int *         height);
 
#define z_cairo_draw_text(cr, widget, layout, text) \
  z_cairo_draw_text_full ( \
    cr, widget, layout, text, Z_CAIRO_TEXT_PADDING, \
    Z_CAIRO_TEXT_PADDING)
 
void
z_cairo_draw_text_full (
  cairo_t *     cr,
  GtkWidget *   widget,
  PangoLayout * layout,
  const char *  text,
  int           start_x,
  int           start_y);
 
static inline void
z_cairo_diamond (
  cairo_t * cr,
  double    x,
  double    y,
  double    width,
  double    height)
{
  cairo_move_to (cr, x, height / 2);
  cairo_line_to (cr, width / 2, y);
  cairo_line_to (cr, width, height / 2);
  cairo_line_to (cr, width / 2, height);
  cairo_line_to (cr, x, height / 2);
  cairo_close_path (cr);
}
 
cairo_surface_t *
z_cairo_get_surface_from_icon_name (
  const char * icon_name,
  int          size,
  int          scale);
 
PangoLayout *
z_cairo_create_pango_layout_from_string (
  GtkWidget *        widget,
  const char *       font,
  PangoEllipsizeMode ellipsize_mode,
  int                ellipsize_padding);
 
PangoLayout *
z_cairo_create_pango_layout_from_description (
  GtkWidget *            widget,
  PangoFontDescription * descr,
  PangoEllipsizeMode     ellipsize_mode,
  int                    ellipsize_padding);
 
PangoLayout *
z_cairo_create_default_pango_layout (GtkWidget * widget);
 
void
z_cairo_reset_caches (
  cairo_t **         cr_cache,
  cairo_surface_t ** surface_cache,
  int                width,
  int                height,
  cairo_t *          new_cr);
 
CairoCaches *
z_cairo_caches_new (void);
 
void
z_cairo_caches_free (CairoCaches * self);
 
#endif