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 we're in a fade, complete it before doing anything else
39 gettimeofday(&now, NULL);
41 double elapsed_fade = double(now.tv_sec - fade_started.tv_sec) +
42 double(now.tv_usec - fade_started.tv_usec) * 1.0e-6;
44 if (elapsed_fade > 6.0 || (!same_fade && elapsed_fade > 1.0)) {
47 // ugly hack here? :-)
48 subscreens[current_screen].screen->draw(subscreens[current_screen].buf);
50 memcpy(buf, subscreens[current_screen].buf, 800 * 600 * 4);
52 // find the fade factors
55 if (elapsed_fade < 1.0) {
56 fr = fg = fb = fa = unsigned(elapsed_fade/1.0 * 256.0);
58 fr = fg = fb = fa = unsigned((elapsed_fade-1.0)/5.0 * 256.0);
61 fr = fg = fb = fa = unsigned(elapsed_fade/1.0 * 256.0);
64 unsigned char *sptr1 = fadefrom_buf;
65 unsigned char *sptr2 = subscreens[current_screen].buf;
66 unsigned char *dptr = buf;
68 if (same_fade && elapsed_fade >= 1.0) {
70 for (unsigned i = 0; i < 800 * 600; ++i) {
71 dptr[0] = sptr2[0] + (((int(sptr2[2]) - int(sptr2[0])) * fb) >> 8);
72 dptr[1] = sptr2[1] + (((int(sptr2[2]) - int(sptr2[1])) * fg) >> 8);
76 sptr1 += 4, sptr2 += 4, dptr += 4;
79 for (unsigned i = 0; i < 800 * 600; ++i) {
80 dptr[0] = sptr1[0] + (((int(sptr2[0]) - int(sptr1[0])) * fb) >> 8);
81 dptr[1] = sptr1[1] + (((int(sptr2[1]) - int(sptr1[1])) * fg) >> 8);
82 dptr[2] = sptr1[2] + (((int(sptr2[2]) - int(sptr1[2])) * fr) >> 8);
83 dptr[3] = sptr1[3] + (((int(sptr2[3]) - int(sptr1[3])) * fa) >> 8);
85 sptr1 += 4, sptr2 += 4, dptr += 4;
90 // determine if we want to switch screens
92 unsigned old_current_screen = current_screen;
94 // push any invalidated screen first (for now)
95 for (unsigned i = 0; i < subscreens.size(); ++i) {
96 if (subscreens[i].screen->check_invalidated()) {
102 // check if we want to go to the next screen
103 if (valid && !force && needs_update()) {
104 current_screen = (current_screen + 1) % subscreens.size();
105 gettimeofday(&last_update, NULL);
108 if (current_screen != old_current_screen || subscreens[current_screen].screen->check_invalidated()) {
111 same_fade = (current_screen == old_current_screen);
112 gettimeofday(&fade_started, NULL);
114 memcpy(fadefrom_buf, subscreens[old_current_screen].buf, 800 * 600 * 4);
116 if (subscreens[current_screen].screen->check_invalidated())
117 subscreens[current_screen].screen->draw(subscreens[current_screen].buf);
123 gettimeofday(&last_update, NULL);
127 // note: makes no sense if valid=false!
128 bool RotateScreen::needs_update()
131 gettimeofday(&now, NULL);
133 double since = double(now.tv_sec - last_update.tv_sec) +
134 double(now.tv_usec - last_update.tv_usec) * 1.0e-6;
136 return (since >= 10.0);
139 void RotateScreen::add_screen(GenericScreen *screen)
142 ss.buf = new unsigned char[800 * 600 * 4];
145 subscreens.push_back(ss);