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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Author:
* Lauris Kaplinski <lauris@kaplinski.com>
* Ralf Stephan <ralf@ark.in-berlin.de>
*
* Copyright (C) 2001-2005 Authors
* Copyright (C) 2001 Ximian, Inc.
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include "ui/widget/color-preview.h"
#include "display/cairo-utils.h"
#include <cairo.h>
#define SPCP_DEFAULT_WIDTH 32
#define SPCP_DEFAULT_HEIGHT 12
namespace Inkscape {
namespace UI {
namespace Widget {
ColorPreview::ColorPreview (guint32 rgba)
{
_rgba = rgba;
set_has_window(false);
set_name("ColorPreview");
}
void
ColorPreview::on_size_allocate (Gtk::Allocation &all)
{
set_allocation (all);
if (get_is_drawable())
queue_draw();
}
void
ColorPreview::get_preferred_height_vfunc(int& minimum_height, int& natural_height) const
{
minimum_height = natural_height = SPCP_DEFAULT_HEIGHT;
}
void
ColorPreview::get_preferred_height_for_width_vfunc(int /* width */, int& minimum_height, int& natural_height) const
{
minimum_height = natural_height = SPCP_DEFAULT_HEIGHT;
}
void
ColorPreview::get_preferred_width_vfunc(int& minimum_width, int& natural_width) const
{
minimum_width = natural_width = SPCP_DEFAULT_WIDTH;
}
void
ColorPreview::get_preferred_width_for_height_vfunc(int /* height */, int& minimum_width, int& natural_width) const
{
minimum_width = natural_width = SPCP_DEFAULT_WIDTH;
}
void
ColorPreview::setRgba32 (guint32 rgba)
{
_rgba = rgba;
if (get_is_drawable())
queue_draw();
}
bool
ColorPreview::on_draw(const Cairo::RefPtr<Cairo::Context>& cr)
{
double x, y, width, height;
const Gtk::Allocation& allocation = get_allocation();
x = 0;
y = 0;
width = allocation.get_width()/2.0;
height = allocation.get_height() - 1;
double radius = height / 7.5;
double degrees = M_PI / 180.0;
cairo_new_sub_path (cr->cobj());
cairo_line_to(cr->cobj(), width, 0);
cairo_line_to(cr->cobj(), width, height);
cairo_arc (cr->cobj(), x + radius, y + height - radius, radius, 90 * degrees, 180 * degrees);
cairo_arc (cr->cobj(), x + radius, y + radius, radius, 180 * degrees, 270 * degrees);
cairo_close_path (cr->cobj());
/* Transparent area */
cairo_pattern_t *checkers = ink_cairo_pattern_create_checkerboard();
cairo_set_source(cr->cobj(), checkers);
cr->fill_preserve();
ink_cairo_set_source_rgba32(cr->cobj(), _rgba);
cr->fill();
cairo_pattern_destroy(checkers);
/* Solid area */
x = width;
cairo_new_sub_path (cr->cobj());
cairo_arc (cr->cobj(), x + width - radius, y + radius, radius, -90 * degrees, 0 * degrees);
cairo_arc (cr->cobj(), x + width - radius, y + height - radius, radius, 0 * degrees, 90 * degrees);
cairo_line_to(cr->cobj(), x, height);
cairo_line_to(cr->cobj(), x, y);
cairo_close_path (cr->cobj());
ink_cairo_set_source_rgba32(cr->cobj(), _rgba | 0xff);
cr->fill();
return true;
}
GdkPixbuf*
ColorPreview::toPixbuf (int width, int height)
{
GdkRectangle carea;
gint w2;
w2 = width / 2;
cairo_surface_t *s = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
cairo_t *ct = cairo_create(s);
/* Transparent area */
carea.x = 0;
carea.y = 0;
carea.width = w2;
carea.height = height;
cairo_pattern_t *checkers = ink_cairo_pattern_create_checkerboard();
// cairo_rectangle(ct, carea.x, carea.y, carea.width, carea.height);
cairo_arc(ct, carea.x + carea.width / 2, carea.y + carea.height / 2, carea.width / 2, 0, 2 * M_PI);
cairo_set_source(ct, checkers);
cairo_fill_preserve(ct);
ink_cairo_set_source_rgba32(ct, _rgba);
cairo_fill(ct);
cairo_pattern_destroy(checkers);
/* Solid area */
carea.x = w2;
carea.y = 0;
carea.width = width - w2;
carea.height = height;
cairo_rectangle(ct, carea.x, carea.y, carea.width, carea.height);
ink_cairo_set_source_rgba32(ct, _rgba | 0xff);
cairo_fill(ct);
cairo_destroy(ct);
cairo_surface_flush(s);
GdkPixbuf* pixbuf = ink_pixbuf_create_from_cairo_surface(s);
return pixbuf;
}
}}}
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :
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