2 #include "rotatescreen.h"
4 RotateScreen::RotateScreen()
5 : valid(false), current_screen(0), in_fade(false)
7 fadefrom_buf = new unsigned char[800 * 600 * 4];
10 RotateScreen::~RotateScreen()
15 bool RotateScreen::check_invalidated()
24 for (unsigned i = 0; i < subscreens.size(); ++i) {
25 if (subscreens[i].screen->check_invalidated())
32 void RotateScreen::draw(unsigned char *buf)
36 if (subscreens.size() == 0) {
38 gettimeofday(&last_update, NULL);
42 // if we're in a fade, complete it before doing anything else
45 gettimeofday(&now, NULL);
47 if (!fade_found_start_time) {
48 fade_found_start_time = true;
52 double elapsed_fade = double(now.tv_sec - fade_started.tv_sec) +
53 double(now.tv_usec - fade_started.tv_usec) * 1.0e-6;
55 if (elapsed_fade > 5.5 || (!same_fade && elapsed_fade > 0.5)) {
58 // ugly hack here? :-)
59 subscreens[current_screen].screen->draw(subscreens[current_screen].buf);
61 memcpy(buf, subscreens[current_screen].buf, 800 * 600 * 4);
63 // find the fade factors
66 if (elapsed_fade < 0.5) {
67 fr = fg = fb = fa = unsigned(elapsed_fade/0.5 * 256.0);
69 fr = fg = fb = fa = unsigned((elapsed_fade-0.5)/5.0 * 256.0);
72 fr = fg = fb = fa = unsigned(elapsed_fade/0.5 * 256.0);
75 unsigned char *sptr1 = fadefrom_buf;
76 unsigned char *sptr2 = subscreens[current_screen].buf;
77 unsigned char *dptr = buf;
79 if (same_fade && elapsed_fade >= 0.5) {
81 for (unsigned i = 0; i < 800 * 600; ++i) {
82 dptr[0] = sptr2[0] + (((int(sptr2[2]) - int(sptr2[0])) * fb) >> 8);
83 dptr[1] = sptr2[1] + (((int(sptr2[2]) - int(sptr2[1])) * fg) >> 8);
87 sptr1 += 4, sptr2 += 4, dptr += 4;
90 for (unsigned i = 0; i < 800 * 600; ++i) {
91 dptr[0] = sptr1[0] + (((int(sptr2[0]) - int(sptr1[0])) * fb) >> 8);
92 dptr[1] = sptr1[1] + (((int(sptr2[1]) - int(sptr1[1])) * fg) >> 8);
93 dptr[2] = sptr1[2] + (((int(sptr2[2]) - int(sptr1[2])) * fr) >> 8);
94 dptr[3] = sptr1[3] + (((int(sptr2[3]) - int(sptr1[3])) * fa) >> 8);
96 sptr1 += 4, sptr2 += 4, dptr += 4;
101 // determine if we want to switch screens
103 unsigned old_current_screen = current_screen;
105 // push any invalidated screen first (for now)
106 for (unsigned i = 0; i < subscreens.size(); ++i) {
107 if (subscreens[i].screen->check_invalidated()) {
113 // check if we want to go to the next screen
114 if (valid && !force && needs_update()) {
115 current_screen = (current_screen + 1) % subscreens.size();
116 gettimeofday(&last_update, NULL);
119 if (!valid || current_screen != old_current_screen || subscreens[current_screen].screen->check_invalidated()) {
122 fade_found_start_time = false;
123 same_fade = (current_screen == old_current_screen) || force;
125 memcpy(fadefrom_buf, subscreens[old_current_screen].buf, 800 * 600 * 4);
127 if (subscreens[current_screen].screen->check_invalidated())
128 subscreens[current_screen].screen->draw(subscreens[current_screen].buf);
134 gettimeofday(&last_update, NULL);
138 // note: makes no sense if valid=false!
139 bool RotateScreen::needs_update()
142 gettimeofday(&now, NULL);
144 double since = double(now.tv_sec - last_update.tv_sec) +
145 double(now.tv_usec - last_update.tv_usec) * 1.0e-6;
147 return (since >= 10.0);
150 void RotateScreen::add_screen(GenericScreen *screen)
153 ss.buf = new unsigned char[800 * 600 * 4];
156 screen->draw(ss.buf);
158 subscreens.push_back(ss);