+/* NOTE: this class will _NOT_ handle resolution changes cleanly. You have been warned. :-) */
+
+#include <cstdio>
#include <cstring>
#include "rotatescreen.h"
RotateScreen::RotateScreen()
- : valid(false), current_screen(0)
+ : fadefrom_buf(NULL), valid(false), current_screen(0), in_fade(false)
{
}
RotateScreen::~RotateScreen()
{
+ delete fadefrom_buf;
}
bool RotateScreen::check_invalidated()
{
if (!valid)
return true;
-
+ if (in_fade)
+ return true;
if (needs_update())
return true;
+ if (!can_update())
+ return false;
for (unsigned i = 0; i < subscreens.size(); ++i) {
- if (subscreens[i].screen->check_invalidated())
+ if (subscreens[i].buf == NULL || subscreens[i].screen->check_invalidated())
return true;
}
return false;
}
-void RotateScreen::draw(unsigned char *buf)
+void RotateScreen::draw(unsigned char *buf, unsigned width, unsigned height)
{
- bool force = false;
-
- // push any invalidated screen first (for now)
- for (unsigned i = 0; i < subscreens.size(); ++i) {
- if (subscreens[i].screen->check_invalidated()) {
- current_screen = i;
- force = true;
+ // see line 1 for all of this
+ if (fadefrom_buf == NULL) {
+ fadefrom_buf = new unsigned char[width * height * 4];
+ }
+ for (std::vector<Subscreen>::iterator i = subscreens.begin(); i != subscreens.end(); ++i) {
+ if (i->buf == NULL) {
+ i->buf = new unsigned char[width * height * 4];
+ i->screen->draw(i->buf, width, height);
}
}
+ // end of "line 1"-code :-)
+
+ bool force = false;
- // check if we want to go to the next screen
- if (valid && !force && needs_update()) {
- current_screen = (current_screen + 1) % subscreens.size();
+ if (subscreens.size() == 0) {
+ valid = true;
gettimeofday(&last_update, NULL);
+ return;
}
+
+ // if we're in a fade, complete it before doing anything else
+ if (in_fade) {
+ struct timeval now;
+ gettimeofday(&now, NULL);
+
+ if (!fade_found_start_time) {
+ fade_found_start_time = true;
+ fade_started = now;
+ }
+
+ double elapsed_fade = double(now.tv_sec - fade_started.tv_sec) +
+ double(now.tv_usec - fade_started.tv_usec) * 1.0e-6;
+
+ if (elapsed_fade > 5.5 || (!fade_to_new_info && elapsed_fade > 0.5)) {
+ in_fade = false;
+
+ // ugly hack here? :-)
+ subscreens[current_screen].screen->draw(subscreens[current_screen].buf, width, height);
+
+ memcpy(buf, subscreens[current_screen].buf, width * height * 4);
+ } else {
+ // find the fade factors
+ int fr, fg, fb, fa;
+ if (fade_to_new_info) {
+ if (elapsed_fade < 0.5) {
+ fr = fg = fb = fa = unsigned(elapsed_fade/0.5 * 256.0);
+ } else {
+ fr = fg = fb = fa = unsigned((elapsed_fade-0.5)/5.0 * 256.0);
+ }
+ } else {
+ fr = fg = fb = fa = unsigned(elapsed_fade/0.5 * 256.0);
+ }
+
+ unsigned char *sptr1 = fadefrom_buf;
+ unsigned char *sptr2 = subscreens[current_screen].buf;
+ unsigned char *dptr = buf;
+
+ if (fade_to_new_info && elapsed_fade >= 0.5) {
+ // fade G&B to be = R
+ for (unsigned i = 0; i < width * height; ++i) {
+ dptr[0] = sptr2[0] + (((int(sptr2[2]) - int(sptr2[0])) * fb) >> 8);
+ dptr[1] = sptr2[1] + (((int(sptr2[2]) - int(sptr2[1])) * fg) >> 8);
+ dptr[2] = sptr2[2];
+ dptr[3] = sptr2[3];
+
+ sptr1 += 4, sptr2 += 4, dptr += 4;
+ }
+ } else {
+ for (unsigned i = 0; i < width * height; ++i) {
+ dptr[0] = sptr1[0] + (((int(sptr2[0]) - int(sptr1[0])) * fb) >> 8);
+ dptr[1] = sptr1[1] + (((int(sptr2[1]) - int(sptr1[1])) * fg) >> 8);
+ dptr[2] = sptr1[2] + (((int(sptr2[2]) - int(sptr1[2])) * fr) >> 8);
+ dptr[3] = sptr1[3] + (((int(sptr2[3]) - int(sptr1[3])) * fa) >> 8);
- if (subscreens[current_screen].screen->check_invalidated())
- subscreens[current_screen].screen->draw(subscreens[current_screen].buf);
+ sptr1 += 4, sptr2 += 4, dptr += 4;
+ }
+ }
+ }
+ } else {
+ // determine if we want to switch screens
- memcpy(buf, subscreens[current_screen].buf, 800 * 600 * 4);
+ unsigned old_current_screen = current_screen;
+ int priority = -9999; // bah :-P
+
+ // push any invalidated screen first (for now)
+ for (unsigned i = 0; i < subscreens.size(); ++i) {
+ if (subscreens[i].screen->check_invalidated() && subscreens[i].screen->get_priority() > priority) {
+ current_screen = i;
+ force = true;
+ priority = subscreens[i].screen->get_priority();
+ }
+ }
+
+ // check if we want to go to the next screen
+ if (valid && !force && needs_update()) {
+ current_screen = (current_screen + 1) % subscreens.size();
+ gettimeofday(&last_update, NULL);
+ }
+
+ if (!valid || current_screen != old_current_screen || subscreens[current_screen].screen->check_invalidated()) {
+ // initialize a fade
+ in_fade = true;
+ fade_found_start_time = false;
+ fade_to_new_info = force;
+
+ memcpy(fadefrom_buf, subscreens[old_current_screen].buf, width * height * 4);
+
+ if (subscreens[current_screen].screen->check_invalidated()) {
+ subscreens[current_screen].screen->draw(subscreens[current_screen].buf, width, height);
+ }
+ }
+ }
if (!valid) {
valid = true;
return (since >= 10.0);
}
+/*
+ * Hold all screens for minimum three seconds, hold all screens with new info
+ * for at minimum eight seconds. There's a slight hack here; a screen with new
+ * info _might_ already be outdated (for instance, if we do an update to a group
+ * with a mistake, then correct it quick afterwards). If it's already outdated,
+ * we ignore the "eight second" rule; the results will be somewhat ugly, though,
+ * but it's hard to do much better without too much special code.
+ */
+bool RotateScreen::can_update()
+{
+ struct timeval now;
+ gettimeofday(&now, NULL);
+
+ double since = double(now.tv_sec - last_update.tv_sec) +
+ double(now.tv_usec - last_update.tv_usec) * 1.0e-6;
+
+ if (since < 3.0)
+ return false;
+ if (fade_to_new_info && !subscreens[current_screen].screen->check_invalidated() && since < 8.0)
+ return false;
+ return true;
+}
+
void RotateScreen::add_screen(GenericScreen *screen)
{
Subscreen ss;
- ss.buf = new unsigned char[800 * 600 * 4];
+ ss.buf = NULL;
ss.screen = screen;
subscreens.push_back(ss);
projects / ccbs / blobdiff