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 "common/utils/pango.h"
#include "gui/backend/gtk_widgets/gtk_wrapper.h"
 
class Color;


#define Z_CAIRO_FONT "Bold 9"

#define Z_CAIRO_TEXT_PADDING 2
 
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);
}

PangoLayoutUniquePtr
z_cairo_create_pango_layout_from_string (
  GtkWidget *        widget,
  const char *       font,
  PangoEllipsizeMode ellipsize_mode,
  int                ellipsize_padding);

PangoLayoutUniquePtr
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_set_source_color (cairo_t * cr, Color color);

 
#endif