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livetrax/libs/gtkmm2ext/ardour_icon.cc

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/*
Copyright (C) 2009 Paul Davis
Copyright (C) 2015 Robin Gareus <robin@gareus.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <math.h> // For M_PI
#include <algorithm>
#include "gtkmm2ext/ardour_icon.h"
// "canvas/types.h" Color == uint32_t
// from libs/canvas/utils.cc
static void ardour_canvas_set_source_rgba (cairo_t *cr, uint32_t color)
{
cairo_set_source_rgba ( cr,
((color >> 24) & 0xff) / 255.0,
((color >> 16) & 0xff) / 255.0,
((color >> 8) & 0xff) / 255.0,
((color >> 0) & 0xff) / 255.0
);
}
bool
Gtkmm2ext::ArdourIcon::render (cairo_t *cr,
const enum Gtkmm2ext::ArdourIcon::Icon icon,
const int width, const int height,
const Gtkmm2ext::ActiveState state,
const uint32_t fg_color)
{
#define VECTORICONSTROKEFILL(fillalpha) \
cairo_set_line_width(cr, 1.5); \
cairo_set_source_rgba (cr, 0, 0, 0, 1.0); \
cairo_stroke_preserve(cr); \
cairo_set_source_rgba (cr, 1, 1, 1, (fillalpha)); \
cairo_fill(cr);
#define VECTORICONSTROKEOUTLINE() \
cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND); \
cairo_set_line_width(cr, 3.0); \
cairo_set_source_rgba (cr, 0, 0, 0, 1.0); \
cairo_stroke_preserve(cr); \
ardour_canvas_set_source_rgba (cr, fg_color); \
cairo_set_line_width(cr, 1.5); \
cairo_stroke(cr);
/* TODO separate these into dedicated class
* it may also be efficient to render them only once for every size (image-surface) */
switch (icon) {
case Gtkmm2ext::ArdourIcon::RecTapeMode:
{
const double x = width * .5;
const double y = height * .5;
const double r = std::min(x, y) * .6;
const double slit = .11 * M_PI;
cairo_save(cr);
cairo_translate(cr, x, y);
cairo_arc (cr, 0, 0, r, 0, 2 * M_PI);
if (state == Gtkmm2ext::ExplicitActive) {
cairo_set_source_rgba (cr, .95, .1, .1, 1.);
} else {
cairo_set_source_rgba (cr, .95, .44, .44, 1.); // #f46f6f
}
cairo_fill_preserve(cr);
cairo_set_source_rgba (cr, .0, .0, .0, .5);
cairo_set_line_width(cr, 1);
cairo_stroke(cr);
cairo_save(cr);
cairo_set_source_rgba (cr, .15, .07, .07, 1.0);
cairo_rotate (cr, -.5 * M_PI);
cairo_move_to(cr, 0, 0);
cairo_arc (cr, 0, 0, r *.85, -slit, slit);
cairo_line_to(cr, 0, 0);
cairo_close_path(cr);
cairo_fill(cr);
cairo_rotate (cr, 2. * M_PI / 3.);
cairo_move_to(cr, 0, 0);
cairo_arc (cr, 0, 0, r *.85, -slit, slit);
cairo_line_to(cr, 0, 0);
cairo_close_path(cr);
cairo_fill(cr);
cairo_rotate (cr, 2. * M_PI / 3.);
cairo_move_to(cr, 0, 0);
cairo_arc (cr, 0, 0, r *.85, -slit, slit);
cairo_line_to(cr, 0, 0);
cairo_close_path(cr);
cairo_fill(cr);
cairo_restore(cr);
cairo_arc (cr, 0, 0, r * .3, 0, 2 * M_PI);
if (state == Gtkmm2ext::ExplicitActive)
cairo_set_source_rgba (cr, .95, .1, .1, 1.);
else
cairo_set_source_rgba (cr, .95, .44, .44, 1.); // #f46f6f
cairo_fill(cr);
cairo_set_source_rgba (cr, .0, .0, .0, 1.0);
cairo_arc (cr, 0, 0, r *.15, 0, 2 * M_PI); // hole in the middle
cairo_fill(cr);
cairo_restore(cr);
}
break;
case Gtkmm2ext::ArdourIcon::RecButton:
{
const double x = width * .5;
const double y = height * .5;
const double r = std::min(x, y) * .55;
cairo_arc (cr, x, y, r, 0, 2 * M_PI);
if (state == Gtkmm2ext::ExplicitActive)
cairo_set_source_rgba (cr, .95, .1, .1, 1.);
else
cairo_set_source_rgba (cr, .95, .44, .44, 1.); // #f46f6f
cairo_fill_preserve(cr);
cairo_set_source_rgba (cr, .0, .0, .0, .8);
cairo_set_line_width(cr, 1);
cairo_stroke(cr);
}
break;
case Gtkmm2ext::ArdourIcon::CloseCross:
{
const double x = width * .5;
const double y = height * .5;
const double o = .5 + std::min(x, y) * .4;
ardour_canvas_set_source_rgba (cr, fg_color);
cairo_set_line_width(cr, 1);
cairo_move_to(cr, x-o, y-o);
cairo_line_to(cr, x+o, y+o);
cairo_move_to(cr, x+o, y-o);
cairo_line_to(cr, x-o, y+o);
cairo_stroke(cr);
}
break;
case Gtkmm2ext::ArdourIcon::StripWidth:
{
const double x0 = width * .2;
const double x1 = width * .8;
const double y0 = height * .25;
const double y1= height * .75;
const double ym= height * .5;
// arrow
const double xa0= height * .39;
const double xa1= height * .61;
const double ya0= height * .35;
const double ya1= height * .65;
ardour_canvas_set_source_rgba (cr, fg_color);
cairo_set_line_width(cr, 1);
// left + right
cairo_move_to(cr, x0, y0);
cairo_line_to(cr, x0, y1);
cairo_move_to(cr, x1, y0);
cairo_line_to(cr, x1, y1);
// horiz center line
cairo_move_to(cr, x0, ym);
cairo_line_to(cr, x1, ym);
// arrow left
cairo_move_to(cr, x0, ym);
cairo_line_to(cr, xa0, ya0);
cairo_move_to(cr, x0, ym);
cairo_line_to(cr, xa0, ya1);
// arrow right
cairo_move_to(cr, x1, ym);
cairo_line_to(cr, xa1, ya0);
cairo_move_to(cr, x1, ym);
cairo_line_to(cr, xa1, ya1);
cairo_stroke(cr);
}
break;
case Gtkmm2ext::ArdourIcon::DinMidi:
{
const double x = width * .5;
const double y = height * .5;
const double r = std::min(x, y) * .75;
ardour_canvas_set_source_rgba (cr, fg_color);
cairo_set_line_width(cr, 1);
cairo_arc (cr, x, y, r, .57 * M_PI, 2.43 * M_PI);
cairo_stroke(cr);
// pins equally spaced 45deg
cairo_arc (cr, x, y * 0.5, r * .15, 0, 2 * M_PI);
cairo_fill(cr);
cairo_arc (cr, x * 0.5, y, r * .15, 0, 2 * M_PI);
cairo_fill(cr);
cairo_arc (cr, x * 1.5, y, r * .15, 0, 2 * M_PI);
cairo_fill(cr);
// .5 + .5 * .5 * sin(45deg), 1.5 - .5 * .5 * cos(45deg)
cairo_arc (cr, x * 0.677, y * .677, r * .15, 0, 2 * M_PI);
cairo_fill(cr);
cairo_arc (cr, x * 1.323, y * .677, r * .15, 0, 2 * M_PI);
cairo_fill(cr);
// bottom notch
cairo_arc (cr, x, y+r, r * .26, 1.05 * M_PI, 1.95 * M_PI);
cairo_stroke(cr);
}
break;
case Gtkmm2ext::ArdourIcon::TransportStop:
{
const int wh = std::min (width, height);
cairo_rectangle (cr,
(width - wh) * .5 + wh * .25,
(height - wh) * .5 + wh * .25,
wh * .5, wh * .5);
VECTORICONSTROKEFILL(0.8);
}
break;
case Gtkmm2ext::ArdourIcon::TransportPlay:
{
const int wh = std::min (width, height) * .5;
const double y = height * .5;
const double x = width - wh;
const float tri = ceil(.577 * wh); // 1/sqrt(3)
cairo_move_to (cr, x + wh * .5, y);
cairo_line_to (cr, x - wh * .5, y - tri);
cairo_line_to (cr, x - wh * .5, y + tri);
cairo_close_path (cr);
VECTORICONSTROKEFILL(0.8);
}
break;
case Gtkmm2ext::ArdourIcon::TransportPanic:
{
const int wh = std::min (width, height) * .1;
const double xc = width * .5;
const double yh = height;
cairo_rectangle (cr,
xc - wh, yh *.19,
wh * 2, yh *.41);
VECTORICONSTROKEFILL(0.8);
cairo_arc (cr, xc, yh *.75, wh, 0, 2 * M_PI);
VECTORICONSTROKEFILL(0.8);
}
break;
case Gtkmm2ext::ArdourIcon::TransportStart:
case Gtkmm2ext::ArdourIcon::TransportEnd:
case Gtkmm2ext::ArdourIcon::TransportRange:
{
// small play triangle
int wh = std::min (width, height);
const double y = height * .5;
const double x = width - wh * .5;
wh *= .18;
const float tri = ceil(.577 * wh * 2); // 1/sqrt(3)
const float ln = std::min (width, height) * .07;
if (icon == Gtkmm2ext::ArdourIcon::TransportStart || icon == Gtkmm2ext::ArdourIcon::TransportRange) {
cairo_rectangle (cr,
x - wh - ln, y - tri * 1.7,
ln * 2, tri * 3.4);
VECTORICONSTROKEFILL(1.0);
}
if (icon == Gtkmm2ext::ArdourIcon::TransportEnd || icon == Gtkmm2ext::ArdourIcon::TransportRange) {
cairo_rectangle (cr,
x + wh - ln, y - tri * 1.7,
ln * 2, tri * 3.4);
VECTORICONSTROKEFILL(1.0);
}
if (icon == Gtkmm2ext::ArdourIcon::TransportStart) {
cairo_move_to (cr, x - wh, y);
cairo_line_to (cr, x + wh, y - tri);
cairo_line_to (cr, x + wh, y + tri);
} else {
cairo_move_to (cr, x + wh, y);
cairo_line_to (cr, x - wh, y - tri);
cairo_line_to (cr, x - wh, y + tri);
}
cairo_close_path (cr);
VECTORICONSTROKEFILL(1.0);
}
break;
case Gtkmm2ext::ArdourIcon::TransportLoop:
{
const double x = width * .5;
const double y = height * .5;
const double r = std::min(x, y);
cairo_arc (cr, x, y, r * .62, 0, 2 * M_PI);
cairo_arc_negative (cr, x, y, r * .35, 2 * M_PI, 0);
VECTORICONSTROKEFILL(1.0);
#define ARCARROW(rad, ang) \
x + (rad) * sin((ang) * 2.0 * M_PI), y + (rad) * cos((ang) * 2.0 * M_PI)
cairo_move_to (cr, ARCARROW(r * .35, .72));
cairo_line_to (cr, ARCARROW(r * .15, .72));
cairo_line_to (cr, ARCARROW(r * .56, .60));
cairo_line_to (cr, ARCARROW(r * .75, .72));
cairo_line_to (cr, ARCARROW(r * .62, .72));
cairo_set_source_rgba (cr, 0, 0, 0, 1.0);
cairo_stroke_preserve(cr);
cairo_close_path (cr);
cairo_set_source_rgba (cr, 1, 1, 1, 1.0);
cairo_fill(cr);
#undef ARCARROW
}
break;
case Gtkmm2ext::ArdourIcon::TransportMetronom:
{
const double x = width * .5;
const double y = height * .5;
const double wh = std::min(x, y);
const double h = wh * .85;
const double w = wh * .55;
const double lw = w * .34;
cairo_rectangle (cr,
x - w * .7, y + h * .25,
w * 1.4, lw);
VECTORICONSTROKEFILL(1.0);
cairo_move_to (cr, x - w, y + h);
cairo_line_to (cr, x + w, y + h);
cairo_line_to (cr, x + w * .35, y - h);
cairo_line_to (cr, x - w * .35, y - h);
cairo_line_to (cr, x - w, y + h);
cairo_move_to (cr, x - w + lw, y + h -lw);
cairo_line_to (cr, x - w * .35 + lw, y - h + lw);
cairo_line_to (cr, x + w * .35 - lw, y - h + lw);
cairo_line_to (cr, x + w - lw, y + h -lw);
cairo_line_to (cr, x - w + lw, y + h -lw);
VECTORICONSTROKEFILL(1.0);
// ddx = .70 w = .75 * .5 wh = .375 wh
// ddy = .75 h - lw = .75 * .8 wh - wh .5 * .2 = .5 wh
// ang = (ddx/ddy):
// -> angle = atan (ang) = atan (375 / .5) ~= 36deg
const double dx = lw * .2; // 1 - cos(tan^-1(ang))
const double dy = lw * .4; // 1 - sin(tan^-1(ang))
cairo_move_to (cr, x - w * .3 , y + h * .25 + lw * .5);
cairo_line_to (cr, x - w + dx , y - h + lw + dy);
cairo_line_to (cr, x - w + lw , y - h + lw);
cairo_line_to (cr, x - w * .3 + lw, y + h * .25 + lw * .5);
cairo_close_path (cr);
VECTORICONSTROKEFILL(1.0);
cairo_rectangle (cr,
x - w * .7, y + h * .25,
w * 1.4, lw);
cairo_fill(cr);
}
break;
case Gtkmm2ext::ArdourIcon::NudgeLeft:
{
const double x = width * .5;
const double y = height * .5;
const double wh = std::min (x, y);
const double tri_x = .3 * wh;
const double tri_y = .6 * wh;
cairo_move_to (cr, x + tri_x, y - tri_y);
cairo_line_to (cr, x - tri_x, y);
cairo_line_to (cr, x + tri_x, y + tri_y);
VECTORICONSTROKEOUTLINE();
}
break;
case Gtkmm2ext::ArdourIcon::NudgeRight:
{
const double x = width * .5;
const double y = height * .5;
const double wh = std::min (x, y);
const double tri_x = .3 * wh;
const double tri_y = .6 * wh;
cairo_move_to (cr, x - tri_x, y - tri_y);
cairo_line_to (cr, x + tri_x, y);
cairo_line_to (cr, x - tri_x, y + tri_y);
VECTORICONSTROKEOUTLINE();
}
break;
default:
return false;
} // end case(icon)
#undef VECTORICONSTROKEFILL
#undef VECTORICONSTROKEOUTLINE
return true;
}