From a6a10ee02837118c2d8129e3c762edf3449c4e96 Mon Sep 17 00:00:00 2001 From: Matthias Clasen Date: Thu, 17 Jul 2003 22:47:10 +0000 Subject: Split correction into multiple pieces if no single weight is large enough MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 2003-07-18 Matthias Clasen * pixops/pixops.c (correct_total): Split correction into multiple pieces if no single weight is large enough to apply the unsplit correction. (#117431, problem reported by Tomas Ögren) --- gdk-pixbuf/pixops/pixops.c | 23 +++++++++++++---------- 1 file changed, 13 insertions(+), 10 deletions(-) (limited to 'gdk-pixbuf/pixops') diff --git a/gdk-pixbuf/pixops/pixops.c b/gdk-pixbuf/pixops/pixops.c index 04a429d296..548d48ee18 100644 --- a/gdk-pixbuf/pixops/pixops.c +++ b/gdk-pixbuf/pixops/pixops.c @@ -952,18 +952,21 @@ correct_total (int *weights, double overall_alpha) { int correction = (int)(0.5 + 65536 * overall_alpha) - total; - + int remaining, c, d, i; + if (correction != 0) { - int i; - for (i = n_x * n_y - 1; i >= 0; i--) - { - if (*(weights + i) + correction >= 0) - { - *(weights + i) += correction; - break; - } - } + remaining = correction; + for (d = 1, c = correction; c != 0 && remaining != 0; d++, c = correction / d) + for (i = n_x * n_y - 1; i >= 0 && c != 0 && remaining != 0; i--) + if (*(weights + i) + c >= 0) + { + *(weights + i) += c; + remaining -= c; + if ((0 < remaining && remaining < c) || + (0 > remaining && remaining > c)) + c = remaining; + } } } -- cgit v1.2.1