X-Git-Url: https://git.sesse.net/?p=ccbs;a=blobdiff_plain;f=bigscreen%2Frotatescreen.cpp;h=78a0e783693ceb3b1ff8fcbeb7964f7c49b6c6af;hp=0997e5c2eed3c2fe738ea49cfe936b72cfe43a4a;hb=9c22e166f4d25f2d80766de9baab56efd9d952b0;hpb=865e85b2e5da68f6bf0b907d239f2277579382a6

diff --git a/bigscreen/rotatescreen.cpp b/bigscreen/rotatescreen.cpp
index 0997e5c..78a0e78 100644
--- a/bigscreen/rotatescreen.cpp
+++ b/bigscreen/rotatescreen.cpp
@@ -2,21 +2,26 @@
 #include "rotatescreen.h"
 
 RotateScreen::RotateScreen()
-	: valid(false), current_screen(0)
+	: valid(false), current_screen(0), in_fade(false)
 {
+	fadefrom_buf = new unsigned char[SCREEN_WIDTH * SCREEN_HEIGHT * 4];
 }
 
 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())
@@ -29,25 +34,104 @@ bool RotateScreen::check_invalidated()
 void RotateScreen::draw(unsigned char *buf)
 {
 	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;
-		}
-	}
 
-	// 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 (subscreens[current_screen].screen->check_invalidated())
-		subscreens[current_screen].screen->draw(subscreens[current_screen].buf);
+		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);
+			
+			memcpy(buf, subscreens[current_screen].buf, SCREEN_WIDTH * SCREEN_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 < SCREEN_WIDTH * SCREEN_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 < SCREEN_WIDTH * SCREEN_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); 
+
+					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, SCREEN_WIDTH * SCREEN_HEIGHT * 4);
+
+			if (subscreens[current_screen].screen->check_invalidated())
+				subscreens[current_screen].screen->draw(subscreens[current_screen].buf);
+		}
+	}
 
 	if (!valid) {
 		valid = true;
@@ -67,12 +151,30 @@ bool RotateScreen::needs_update()
 	return (since >= 10.0);
 }
 
+// hold all screens for minimum three seconds, hold all screens with new info for at minimum eight seconds
+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 && 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 = new unsigned char[SCREEN_WIDTH * SCREEN_HEIGHT * 4];
 	ss.screen = screen;
 
+	screen->draw(ss.buf);
+	
 	subscreens.push_back(ss);
 }