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/* dynamic_screen.c
* Copyright (C) 2018 Johannes Mueller <github@johannes-mueller.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.
*/
/* Shared code for a-comp.c and a-exp.c
*
* This file contains some code that draws the basic layout of for the inline
* rendering of a-comp.c and a-exp.c. It is put into a shared file for better
* maintainability. It is not meant to be compiled as a individual compilation
* unit but to be included like
*
* #include "dynamic_screen.c"
*
*/
static inline void
draw_grid (cairo_t* cr, const float w, const float h)
{
// clear background
cairo_rectangle (cr, 0, 0, w, h);
cairo_set_source_rgba (cr, .2, .2, .2, 1.0);
cairo_fill (cr);
cairo_set_line_width(cr, 1.0);
// draw grid 10dB steps
const double dash1[] = {1, 2};
const double dash2[] = {1, 3};
cairo_save (cr);
cairo_set_line_cap(cr, CAIRO_LINE_CAP_ROUND);
cairo_set_dash(cr, dash2, 2, 2);
cairo_set_source_rgba (cr, 0.5, 0.5, 0.5, 0.5);
for (uint32_t d = 1; d < 7; ++d) {
const float x = -.5 + floorf (w * (d * 10.f / 70.f));
const float y = -.5 + floorf (h * (d * 10.f / 70.f));
cairo_move_to (cr, x, 0);
cairo_line_to (cr, x, h);
cairo_stroke (cr);
cairo_move_to (cr, 0, y);
cairo_line_to (cr, w, y);
cairo_stroke (cr);
}
cairo_set_source_rgba (cr, 0.5, 0.5, 0.5, 1.0);
cairo_set_dash(cr, dash1, 2, 2);
// diagonal unity
cairo_move_to (cr, 0, h);
cairo_line_to (cr, w, 0);
cairo_stroke (cr);
cairo_restore (cr);
{ // 0, 0
cairo_set_source_rgba (cr, 0.5, 0.5, 0.5, 0.5);
const float x = -.5 + floorf (w * (60.f / 70.f));
const float y = -.5 + floorf (h * (10.f / 70.f));
cairo_move_to (cr, x, 0);
cairo_line_to (cr, x, h);
cairo_stroke (cr);
cairo_move_to (cr, 0, y);
cairo_line_to (cr, w, y);
cairo_stroke (cr);
}
}
static inline void
draw_GR_bar (cairo_t* cr, const float w, const float h, const float gainr)
{
const float x = -.5 + floorf (w * (62.5f / 70.f));
const float y = -.5 + floorf (h * (10.0f / 70.f));
const float wd = floorf (w * (5.f / 70.f));
const float ht = floorf (h * (55.f / 70.f));
cairo_rectangle (cr, x, y, wd, ht);
cairo_fill (cr);
const float h_gr = fminf (ht, floorf (h * gainr / 70.f));
cairo_set_source_rgba (cr, 0.95, 0.0, 0.0, 1.0);
cairo_rectangle (cr, x, y, wd, h_gr);
cairo_fill (cr);
cairo_set_source_rgba (cr, 0.5, 0.5, 0.5, 0.5);
cairo_rectangle (cr, x, y, wd, ht);
cairo_set_source_rgba (cr, 0.75, 0.75, 0.75, 1.0);
cairo_stroke (cr);
}
static inline void
draw_inline_bars (cairo_t* cr, const float w, const float h,
const float thresdb, const float ratio,
const float peakdb, const float gainr,
const float level_in, const float level_out)
{
cairo_rectangle (cr, 0, 0, w, h);
cairo_set_source_rgba (cr, .2, .2, .2, 1.0);
cairo_fill (cr);
cairo_save (cr);
const float ht = 0.25f * h;
const float x1 = w*0.05;
const float wd = w - 2.0f*x1;
const float y1 = 0.17*h;
const float y2 = h - y1 - ht;
cairo_set_source_rgba (cr, 0.5, 0.5, 0.5, 0.5);
cairo_rectangle (cr, x1, y1, wd, ht);
cairo_fill (cr);
cairo_rectangle (cr, x1, y2, wd, ht);
cairo_fill (cr);
cairo_set_source_rgba (cr, 0.75, 0.0, 0.0, 1.0);
const float w_gr = (gainr > 60.f) ? wd : wd * gainr * (1.f/60.f);
cairo_rectangle (cr, x1+wd-w_gr, y2, w_gr, ht);
cairo_fill (cr);
if (level_in > -60.f) {
if (level_out > 6.f) {
cairo_set_source_rgba (cr, 0.75, 0.0, 0.0, 1.0);
} else if (level_out > 0.f) {
cairo_set_source_rgba (cr, 0.66, 0.66, 0.0, 1.0);
} else {
cairo_set_source_rgba (cr, 0.0, 0.66, 0.0, 1.0);
}
const float w_g = (level_in > 10.f) ? wd : wd * (60.f+level_in) / 70.f;
cairo_rectangle (cr, x1, y1, w_g, ht);
cairo_fill (cr);
}
cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 1.0);
const float tck = 0.33*ht;
cairo_set_line_width (cr, .5);
for (uint32_t d = 1; d < 7; ++d) {
const float x = x1 + (d * wd * (10.f / 70.f));
cairo_move_to (cr, x, y1);
cairo_line_to (cr, x, y1+tck);
cairo_move_to (cr, x, y1+ht);
cairo_line_to (cr, x, y1+ht-tck);
cairo_move_to (cr, x, y2);
cairo_line_to (cr, x, y2+tck);
cairo_move_to (cr, x, y2+ht);
cairo_line_to (cr, x, y2+ht-tck);
}
cairo_stroke (cr);
const float x_0dB = x1 + wd*(60.f/70.f);
cairo_move_to (cr, x_0dB, y1);
cairo_line_to (cr, x_0dB, y1+ht);
cairo_rectangle (cr, x1, y1, wd, ht);
cairo_rectangle (cr, x1, y2, wd, ht);
cairo_stroke (cr);
cairo_set_line_width (cr, 2.0);
// visualize threshold
const float tr = x1 + wd * (60.f+thresdb) / 70.f;
cairo_set_source_rgba (cr, 0.95, 0.95, 0.0, 1.0);
cairo_move_to (cr, tr, y1);
cairo_line_to (cr, tr, y1+ht);
cairo_stroke (cr);
// visualize ratio
const float reduced_0dB = thresdb * (1.f - 1.f/ratio);
const float rt = x1 + wd * (60.f+reduced_0dB) / 70.f;
cairo_set_source_rgba (cr, 0.95, 0.0, 0.0, 1.0);
cairo_move_to (cr, rt, y1);
cairo_line_to (cr, rt, y1+ht);
cairo_stroke (cr);
// visualize in peak
if (peakdb > -60.f) {
cairo_set_source_rgba (cr, 0.0, 1.0, 0.0, 1.0);
const float pk = (peakdb > 10.f) ? x1+wd : wd * (60.f+peakdb) / 70.f;
cairo_move_to (cr, pk, y1);
cairo_line_to (cr, pk, y1+ht);
cairo_stroke (cr);
}
}
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