1 /*
2 * bit_display.cc
3 * DIN Is Noise is copyright (c) 2006-2021 Jagannathan Sampath
4 * DIN Is Noise is released under GNU Public License 2.0
5 * For more information, please visit https://dinisnoise.org/
6 */
7
8 #include "bit_display.h"
9 #include "dingl.h"
10
bit_display(int w,int h)11 bit_display::bit_display (int w, int h) {
12 num_bits = 0;
13 lsnr = 0;
14 prev_id = -1;
15 set_size (w, h);
16 }
17
set_size(int w,int h)18 void bit_display::set_size (int w, int h) {
19 set_extents (extents.left, extents.bottom, extents.left + w, extents.bottom + h);
20 set_pos (posx, posy);
21 }
22
set_pos(int x,int y)23 void bit_display::set_pos (int x, int y) {
24 widget::set_pos (x, y);
25 calc_visual_params ();
26 }
27
set(void * bytes,int num_bytes)28 void bit_display::set (void* bytes, int num_bytes) { // show bits of the given bytes
29 num_bits = 8 * num_bytes;
30 last_bit = num_bits - 1;
31 bits.resize (num_bits); // init bit array
32 unsigned char* pchar = (unsigned char *) bytes; // treat as character array
33 for (int i = 0, k = 0; i < num_bytes; ++i) { // number of bytes = number of characters now
34 unsigned char ci = pchar[i]; // ith character
35 for (int j = 0; j < 8; ++j) { // extract bits of this character and store in bit array
36 unsigned char tb = (ci & 0x80) >> 7; // extract left most bit
37 bits[k++] = tb;
38 ci = ci << 1; // left shift character by 1 bit
39 }
40 }
41 calc_visual_params ();
42 }
43
calc_visual_params()44 void bit_display::calc_visual_params () {
45 if (num_bits) {
46 d_width = int (extents.width / num_bits); // display width for each bit
47 int width = d_width * num_bits; // total width occupied by displayed bits
48 xstart = extents.left;
49 xend = xstart + width;
50 }
51 }
52
53 extern int mousex, mouseyy;
54
find_bit_id()55 int bit_display::find_bit_id () {
56 if (mousex < xstart) return 0;
57 else if (mousex > xend) return last_bit;
58 return (mousex - xstart) / d_width;;
59 }
60
handle_input()61 int bit_display::handle_input () {
62 int ret = widget::handle_input ();
63 if (hover) {
64 if (lmb) {
65 cur_id = find_bit_id ();
66 if (cur_id != prev_id) {
67 prev_id = cur_id;
68 bits[cur_id] = !bits[cur_id];
69 if (lsnr) lsnr->changed (*this);
70 }
71 } else prev_id = -1;
72 }
73 return ret;
74 }
75
draw()76 void bit_display::draw () {
77 glColor3f (clr.r, clr.g, clr.b);
78 glPolygonMode (GL_FRONT, GL_LINE);
79 glRecti (xstart, extents.bottom, xend, extents.top);
80 int xl = xstart, xr = xl;
81 for (int i = 0; i < num_bits; ++i) {
82 unsigned char bi = bits[i];
83 if (bi) glPolygonMode (GL_FRONT, GL_FILL); else glPolygonMode (GL_FRONT, GL_LINE);
84 xr = xl + d_width;
85 glRecti (xl, extents.bottom, xr, extents.top);
86 xl = xr;
87 }
88 glPolygonMode (GL_FRONT, GL_FILL);
89 }
90
get_color(ucolor_t * uc)91 void bit_display::get_color (ucolor_t* uc) {
92 unsigned char* pchar = (unsigned char*) uc;
93 for (int i = 0, j = 0; i < 3; ++i) {
94 unsigned char uci = 0;
95 for (int k = 7; k > -1; --k) {
96 unsigned char bj = bits[j++];
97 uci = uci | (bj << k);
98 }
99 pchar[i] = uci;
100 }
101 }
102