#include "rotatescreen.h"
RotateScreen::RotateScreen()
- : valid(false), current_screen(0)
+ : valid(false), current_screen(0), in_fade(false)
{
+ fadefrom_buf = new unsigned char[800 * 600 * 4];
}
RotateScreen::~RotateScreen()
{
+ delete fadefrom_buf;
}
bool RotateScreen::check_invalidated()
{
if (!valid)
return true;
-
+ if (in_fade)
+ return true;
if (needs_update())
return true;
{
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;
- }
- }
+ // if we're in a fade, complete it before doing anything else
+ if (in_fade) {
+ struct timeval now;
+ gettimeofday(&now, NULL);
- // 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);
- }
+ double elapsed_fade = double(now.tv_sec - fade_started.tv_sec) +
+ double(now.tv_usec - fade_started.tv_usec) * 1.0e-6;
+ printf("fade: %f\n", elapsed_fade);
+
+ if (elapsed_fade > 6.0 || (!same_fade && elapsed_fade > 1.0)) {
+ in_fade = false;
+
+ // ugly hack here? :-)
+ subscreens[current_screen].screen->draw(subscreens[current_screen].buf);
+
+ memcpy(buf, subscreens[current_screen].buf, 800 * 600 * 4);
+ printf("fade done\n");
+ } else {
+ // find the fade factors
+ int fr, fg, fb, fa;
+ if (same_fade) {
+ if (elapsed_fade < 1.0) {
+ fr = fg = fb = fa = unsigned(elapsed_fade/1.0 * 256.0);
+ } else {
+ fr = fg = fb = fa = unsigned((elapsed_fade-1.0)/5.0 * 256.0);
+ }
+ } else {
+ fr = fg = fb = fa = unsigned(elapsed_fade/1.0 * 256.0);
+ }
+ printf("%u %u %u %u\n", fr, fg, fb, fa);
+
+ unsigned char *sptr1 = fadefrom_buf;
+ unsigned char *sptr2 = subscreens[current_screen].buf;
+ unsigned char *dptr = buf;
+
+ if (same_fade && elapsed_fade >= 1.0) {
+ // fade G&B to be = R
+ for (unsigned i = 0; i < 800 * 600; ++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];
- if (subscreens[current_screen].screen->check_invalidated())
- subscreens[current_screen].screen->draw(subscreens[current_screen].buf);
+ sptr1 += 4, sptr2 += 4, dptr += 4;
+ }
+ } else {
+ for (unsigned i = 0; i < 800 * 600; ++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);
+
+ 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;
+
+ // 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;
+ }
+ }
+
+ // 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 (current_screen != old_current_screen || subscreens[current_screen].screen->check_invalidated()) {
+ // initialize a fade
+ in_fade = true;
+ same_fade = (current_screen == old_current_screen);
+ gettimeofday(&fade_started, NULL);
+ printf("starting fade (same=%u)\n", same_fade);
+
+ memcpy(fadefrom_buf, subscreens[old_current_screen].buf, 800 * 600 * 4);
+
+ if (subscreens[current_screen].screen->check_invalidated())
+ subscreens[current_screen].screen->draw(subscreens[current_screen].buf);
+ }
+ }
if (!valid) {
valid = true;