1 /*
2 * Copyright (C) 2018 Johannes Mueller <github@johannes-mueller.org>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17 */
18
19
20 /* Shared code for a-comp.c and a-exp.c
21 *
22 * This file contains some code that draws the basic layout of for the inline
23 * rendering of a-comp.c and a-exp.c. It is put into a shared file for better
24 * maintainability. It is not meant to be compiled as a individual compilation
25 * unit but to be included like
26 *
27 * #include "dynamic_screen.c"
28 *
29 */
30
31
32 static inline void
draw_grid(cairo_t * cr,const float w,const float h)33 draw_grid (cairo_t* cr, const float w, const float h)
34 {
35 // clear background
36 cairo_rectangle (cr, 0, 0, w, h);
37 cairo_set_source_rgba (cr, .2, .2, .2, 1.0);
38 cairo_fill (cr);
39
40 cairo_set_line_width(cr, 1.0);
41
42 // draw grid 10dB steps
43 const double dash1[] = {1, 2};
44 const double dash2[] = {1, 3};
45 cairo_save (cr);
46 cairo_set_line_cap(cr, CAIRO_LINE_CAP_ROUND);
47 cairo_set_dash(cr, dash2, 2, 2);
48 cairo_set_source_rgba (cr, 0.5, 0.5, 0.5, 0.5);
49
50 for (uint32_t d = 1; d < 7; ++d) {
51 const float x = -.5 + floorf (w * (d * 10.f / 70.f));
52 const float y = -.5 + floorf (h * (d * 10.f / 70.f));
53
54 cairo_move_to (cr, x, 0);
55 cairo_line_to (cr, x, h);
56 cairo_stroke (cr);
57
58 cairo_move_to (cr, 0, y);
59 cairo_line_to (cr, w, y);
60 cairo_stroke (cr);
61 }
62 cairo_set_source_rgba (cr, 0.5, 0.5, 0.5, 1.0);
63 cairo_set_dash(cr, dash1, 2, 2);
64
65 // diagonal unity
66 cairo_move_to (cr, 0, h);
67 cairo_line_to (cr, w, 0);
68 cairo_stroke (cr);
69 cairo_restore (cr);
70
71 { // 0, 0
72 cairo_set_source_rgba (cr, 0.5, 0.5, 0.5, 0.5);
73 const float x = -.5 + floorf (w * (60.f / 70.f));
74 const float y = -.5 + floorf (h * (10.f / 70.f));
75 cairo_move_to (cr, x, 0);
76 cairo_line_to (cr, x, h);
77 cairo_stroke (cr);
78 cairo_move_to (cr, 0, y);
79 cairo_line_to (cr, w, y);
80 cairo_stroke (cr);
81 }
82 }
83
84 static inline void
draw_GR_bar(cairo_t * cr,const float w,const float h,const float gainr)85 draw_GR_bar (cairo_t* cr, const float w, const float h, const float gainr)
86 {
87 const float x = -.5 + floorf (w * (62.5f / 70.f));
88 const float y = -.5 + floorf (h * (10.0f / 70.f));
89 const float wd = floorf (w * (5.f / 70.f));
90 const float ht = floorf (h * (55.f / 70.f));
91 cairo_rectangle (cr, x, y, wd, ht);
92 cairo_fill (cr);
93
94 const float h_gr = fminf (ht, floorf (h * gainr / 70.f));
95 cairo_set_source_rgba (cr, 0.95, 0.0, 0.0, 1.0);
96 cairo_rectangle (cr, x, y, wd, h_gr);
97 cairo_fill (cr);
98 cairo_set_source_rgba (cr, 0.5, 0.5, 0.5, 0.5);
99 cairo_rectangle (cr, x, y, wd, ht);
100 cairo_set_source_rgba (cr, 0.75, 0.75, 0.75, 1.0);
101 cairo_stroke (cr);
102 }
103
104 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)105 draw_inline_bars (cairo_t* cr, const float w, const float h,
106 const float thresdb, const float ratio,
107 const float peakdb, const float gainr,
108 const float level_in, const float level_out)
109 {
110 cairo_rectangle (cr, 0, 0, w, h);
111 cairo_set_source_rgba (cr, .2, .2, .2, 1.0);
112 cairo_fill (cr);
113
114
115 cairo_save (cr);
116
117 const float ht = 0.25f * h;
118
119 const float x1 = w*0.05;
120 const float wd = w - 2.0f*x1;
121
122 const float y1 = 0.17*h;
123 const float y2 = h - y1 - ht;
124
125 cairo_set_source_rgba (cr, 0.5, 0.5, 0.5, 0.5);
126
127 cairo_rectangle (cr, x1, y1, wd, ht);
128 cairo_fill (cr);
129
130 cairo_rectangle (cr, x1, y2, wd, ht);
131 cairo_fill (cr);
132
133 cairo_set_source_rgba (cr, 0.75, 0.0, 0.0, 1.0);
134 const float w_gr = (gainr > 60.f) ? wd : wd * gainr * (1.f/60.f);
135 cairo_rectangle (cr, x1+wd-w_gr, y2, w_gr, ht);
136 cairo_fill (cr);
137
138 if (level_in > -60.f) {
139 if (level_out > 6.f) {
140 cairo_set_source_rgba (cr, 0.75, 0.0, 0.0, 1.0);
141 } else if (level_out > 0.f) {
142 cairo_set_source_rgba (cr, 0.66, 0.66, 0.0, 1.0);
143 } else {
144 cairo_set_source_rgba (cr, 0.0, 0.66, 0.0, 1.0);
145 }
146 const float w_g = (level_in > 10.f) ? wd : wd * (60.f+level_in) / 70.f;
147 cairo_rectangle (cr, x1, y1, w_g, ht);
148 cairo_fill (cr);
149 }
150
151 cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 1.0);
152
153 const float tck = 0.33*ht;
154
155 cairo_set_line_width (cr, .5);
156
157 for (uint32_t d = 1; d < 7; ++d) {
158 const float x = x1 + (d * wd * (10.f / 70.f));
159
160 cairo_move_to (cr, x, y1);
161 cairo_line_to (cr, x, y1+tck);
162
163 cairo_move_to (cr, x, y1+ht);
164 cairo_line_to (cr, x, y1+ht-tck);
165
166 cairo_move_to (cr, x, y2);
167 cairo_line_to (cr, x, y2+tck);
168
169 cairo_move_to (cr, x, y2+ht);
170 cairo_line_to (cr, x, y2+ht-tck);
171 }
172
173 cairo_stroke (cr);
174
175 const float x_0dB = x1 + wd*(60.f/70.f);
176
177 cairo_move_to (cr, x_0dB, y1);
178 cairo_line_to (cr, x_0dB, y1+ht);
179
180 cairo_rectangle (cr, x1, y1, wd, ht);
181 cairo_rectangle (cr, x1, y2, wd, ht);
182 cairo_stroke (cr);
183
184 cairo_set_line_width (cr, 2.0);
185
186 // visualize threshold
187 const float tr = x1 + wd * (60.f+thresdb) / 70.f;
188 cairo_set_source_rgba (cr, 0.95, 0.95, 0.0, 1.0);
189 cairo_move_to (cr, tr, y1);
190 cairo_line_to (cr, tr, y1+ht);
191 cairo_stroke (cr);
192
193 // visualize ratio
194 const float reduced_0dB = thresdb * (1.f - 1.f/ratio);
195 const float rt = x1 + wd * (60.f+reduced_0dB) / 70.f;
196 cairo_set_source_rgba (cr, 0.95, 0.0, 0.0, 1.0);
197 cairo_move_to (cr, rt, y1);
198 cairo_line_to (cr, rt, y1+ht);
199 cairo_stroke (cr);
200
201 // visualize in peak
202 if (peakdb > -60.f) {
203 cairo_set_source_rgba (cr, 0.0, 1.0, 0.0, 1.0);
204 const float pk = (peakdb > 10.f) ? x1+wd : wd * (60.f+peakdb) / 70.f;
205 cairo_move_to (cr, pk, y1);
206 cairo_line_to (cr, pk, y1+ht);
207 cairo_stroke (cr);
208 }
209 }
210