From: Timo Kokkonen <kaapeli@itanic.dy.fi>
Date: Sun, 4 Apr 2010 07:37:42 +0000 (+0300)
Subject: fade_buf: Allow fading with very small increments
X-Git-Url: http://git.itanic.dy.fi/?p=sdl-planets;a=commitdiff_plain;h=14a760bbdb09a19a8be6e847eeb0f82c33ed45a8

fade_buf: Allow fading with very small increments

Signed-off-by: Timo Kokkonen <kaapeli@itanic.dy.fi>
---

diff --git a/main.c b/main.c
index 66272cb..d2f408a 100644
--- a/main.c
+++ b/main.c
@@ -8,11 +8,21 @@
 
 #define MAX_FPS 60
 
-static void fade_buf(SDL_Surface *screen, int amount)
+static void fade_buf(SDL_Surface *screen, double fade)
 {
 	int i;
 	unsigned int *buf = screen->pixels;
 	unsigned char *b;
+	unsigned char amount;
+	static double threshold = 0;
+	threshold += fade;
+
+	if (threshold > 1) {
+		amount = threshold;
+		threshold -= amount;
+	} else {
+		return;
+	}
 
 	for (i = 0; i < screen->pitch * screen->h / sizeof(*buf); i ++) {
 		if (!buf[i])